CN116907401A - Sensor assembly for rotor displacement detection and motor - Google Patents
Sensor assembly for rotor displacement detection and motor Download PDFInfo
- Publication number
- CN116907401A CN116907401A CN202310910195.2A CN202310910195A CN116907401A CN 116907401 A CN116907401 A CN 116907401A CN 202310910195 A CN202310910195 A CN 202310910195A CN 116907401 A CN116907401 A CN 116907401A
- Authority
- CN
- China
- Prior art keywords
- probe
- rotor
- axial
- compensating
- radial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
本发明提供一种转子位移检测的传感器组件和电机，转子位移检测的传感器组件，其包括：被测转子、传感器探头和补偿探头，被测转子包括轴向检测位置，传感器探头设置于轴向检测位置的径向外侧以与轴向检测位置在径向方向相对，补偿探头设置于被测转子的径向外侧且不与轴向检测位置相对，设沿着被测转子的中心轴线方向为Z轴方向，垂直于Z轴的径向平面并经过传感器探头的中心的方向为X轴方向，并有：根据本发明能同时实现X、Z两个方向的位移信号的输出，能够实现检测精度高的效果，具有精度高的优点。
The invention provides a sensor assembly and a motor for rotor displacement detection. The sensor assembly for rotor displacement detection includes: a measured rotor, a sensor probe and a compensation probe. The measured rotor includes an axial detection position, and the sensor probe is arranged at the axial detection position. The radial outer side of the position is opposite to the axial detection position in the radial direction. The compensation probe is installed on the radial outer side of the measured rotor and not opposite to the axial detection position. Let the direction along the central axis of the measured rotor be the Z axis. direction, the direction perpendicular to the radial plane of the Z-axis and passing through the center of the sensor probe is the X-axis direction, and has: According to the present invention, the output of displacement signals in the X and Z directions can be realized simultaneously, and the effect of high detection accuracy can be achieved, which has the advantage of high accuracy.
Description
Technical Field
The application relates to the technical field of sensors, in particular to a sensor assembly for detecting rotor displacement and a motor.
Background
The sensor is a tool for acquiring information, is a five sense organ of a machine, and is one of three main posts of information technology. The sensor technology is a source technology of a chain of information acquisition-processing-transmission, is a basic technology of automation and intellectualization of modern industrial production and manufacture, and the development level of the sensor technology represents the industrialization level of a country. Any operating machine, as long as there is motion or mechanical deformation, requires a displacement sensor for measurement and control. In addition, many non-displacement quantities, such as mechanical quantities of speed, pressure, angle, angular velocity, or even torque, can be converted into displacement for measurement. Displacement sensors are the most important and fundamental members of a large family of sensors, and are of a wide variety of types and forms, thereby meeting the needs of various applications. With the development of modern advanced manufacturing technology and industrial automation, there is an increasing demand for displacement sensors, such as non-contact, high resolution, high stability, high speed (wide bandwidth), low cost, small volume, insensitivity to environmental parameters, high tolerance to harsh environments, etc.
As shown in fig. 1, in general, a single displacement sensor probe is only used for detecting displacement in a single direction, but cannot detect displacement in a direction perpendicular to the single direction, and as shown in the following figure, the sensor probe is mounted in an X direction, and can detect displacement in the X direction, while displacement in a Y, Z direction cannot be recognized by the sensor probe mounted in the X direction, and if the sensor probe is required to detect displacement in the Y, Z direction, the sensor probe is required to be additionally mounted in a corresponding direction.
In practical application, the sensor probe cannot be installed in all detected directions due to factors such as space limitation, the single displacement sensor probe can identify multi-directional displacement by carrying out surface treatment on a detected body, the detected body is a rotor, the Z direction is the axial radial direction, the X, Y direction is the radial direction, the sensor probe is installed in the X direction, the displacement in the X direction can be normally detected, a step or an inclined plane is processed in the detection range of the sensor probe on the detected rotor along the axial Z direction, the sensor probe installed in the X direction can identify the displacement of the detected rotor in the Z direction, and the displacement detection of two directions can be simultaneously realized by the single probe.
The single displacement sensor probe can recognize multi-directional displacement by processing a measured body, but the probe cannot output displacement amounts in all directions respectively, and the problem is usually solved by adding a differential probe in the opposite direction, taking fig. 3 as an example, a sensor probe a is arranged in the X+ direction, and a sensor probe b is arranged in the X-direction. When the tested rotor is displaced in the X direction, the sensor probe a and the sensor probe b output opposite signals; when the measured rotor moves in the Z direction, the sensor probe a and the sensor probe b output the same signals. The signals of the sensor probe a and the sensor probe b are added, so that the X-direction displacement signals can be eliminated, and the Z-direction displacement signals can be independently output; the signals of the sensor probe a and the sensor probe b are subtracted, the Z-direction displacement signal can be eliminated, and the X-direction displacement signal is independently output, so that the displacement detection in the two directions X, Z is realized while the X-direction probe is installed.
U+: probe a voltage, U-: probe b voltage, kx: radial sensitivity, kz: axial sensitivity, X: radial displacement, Z: and (5) axially displacing.
However, the X, Z directional displacement signal has a high-order coupling term, so that the decoupling cannot be realized through simple superposition and subtraction operation, and the coupling in practical application leads to poor detection precision, so that the detection requirement cannot be met.
U+: probe a voltage, U-: probe b voltage, kxx: radial quadratic coefficient, kx: radial sensitivity; kz: axial sensitivity, K: coupling term coefficient, X: radial displacement, Z: and (5) axially displacing.
There is also a background art in the prior art that can improve the detection accuracy, as shown in fig. 4, the axial displacement calculation unit is configured to calculate the axial displacement according to the formulaCalculating the axial displacement of the tested element; where Ur is the first electrical signal, U z is the second electrical signal, phi is the inclination angle of the inclined surface, k1 is the sensitivity parameter of the first sensor, and k2 is the sensitivity parameter of the second sensor.
But it has the following limitations: 1. the two probes are required to be aligned with the center axis of the probe ring and the installation directions are consistent, so that the probes are installed to occupy an excessive axial dimension, the length of the rotor is further increased, and the dynamic characteristics of the operation of the rotor are affected; 2. the axial length of the inclined surface is larger than the maximum axial displacement of the measured element, so that the length of the rotor is related to the axial displacement and the size of the sensor probe, the axial displacement is required to be further increased, and the space utilization rate is low.
Because the displacement sensor in the prior art can not output displacement amounts in all directions respectively when realizing displacement detection in a plurality of directions, the displacement amounts in all directions can not be output due to the fact that high-order coupling items exist when a differential sensor is adopted, and the detection precision is poor; the displacement sensor adopting the inclined plane structure increases the probe spacing, so that the sensor occupies an excessive axial dimension, has low space utilization rate and other technical problems, and therefore, the application designs a sensor component for detecting the rotor displacement and a motor.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to overcome the defect that the detection precision is poor because the displacement sensor in the prior art can not output displacement amounts in all directions respectively and accurately when the displacement sensor detects displacement in a plurality of directions, thereby providing a sensor component and a motor for detecting rotor displacement.
In order to solve the above-mentioned problems, the present application provides a sensor assembly for rotor displacement detection, comprising:
the device comprises a rotor to be tested, a sensor probe and a compensation probe, wherein the rotor to be tested comprises an axial detection position, the sensor probe is arranged on the radial outer side of the axial detection position to be opposite to the axial detection position in the radial direction, the compensation probe is arranged on the radial outer side of the rotor to be tested and is not opposite to the axial detection position, the direction along the central axis of the rotor to be tested is the Z-axis direction, the direction perpendicular to the radial plane of the Z-axis and passing through the center of the sensor probe is the X-axis direction, and the device comprises:
；
wherein: u (U) 1 : sensor probe voltage, U Compensation : compensating the probe voltage, K xx : radial quadratic term coefficient, K x : radial sensitivity, K z : axial sensitivity, K: coupling term coefficient, X: displacement of the rotor to be measured along the X-axis direction, Z: and the displacement of the rotor to be measured along the Z-axis direction.
In some embodiments of the present application, in some embodiments,
the rotor to be tested is a stepped shaft, the stepped shaft comprises a first shaft section and a second shaft section which are connected, the outer diameter of the first shaft section is smaller than that of the second shaft section, so that a step surface is formed at the joint of the first shaft section and the second shaft section, and the axial detection position comprises the step surface;
the step surface and the sensor probe are oppositely arranged along the radial direction; the compensating probe is arranged on the radial outer side of the first shaft section and is not opposite to the step surface, or the compensating probe is arranged on the radial outer side of the second shaft section and is not opposite to the step surface.
In some embodiments of the present application, in some embodiments,
the first shaft section coincides with the central axis of the second shaft section, the central axis takes the direction from the second shaft section to the first shaft section as the positive direction of the Z shaft, the intersection of the plane of the step surface and the central axis is an O point, the center of the sensor probe is opposite to the step surface, the connecting line direction of the O point to the center of the sensor probe is the positive direction of the X shaft, and the direction in the plane of the step surface and perpendicular to the X shaft is the Y shaft direction.
In some embodiments of the present application, in some embodiments,
the axial detection position is a position of the step surface which is offset by a distance of a towards the positive direction of the Z axis, wherein a is more than or equal to 0, and/or the axial detection position is a position of the step surface which is offset by a distance of b towards the negative direction of the Z axis, wherein b is more than or equal to 0.
In some embodiments of the present application, in some embodiments,
the sensor probe has a first preset distance greater than 0 from the radial outer periphery of the axial detection position, the compensation probe is arranged on the radial outer side of the second shaft section and has a second preset distance greater than 0 from the outer periphery of the second shaft section, and the compensation probe has a third preset distance greater than 0 from the axial detection position along the Z-axis direction.
In some embodiments of the present application, in some embodiments,
in the axial projection plane facing the step surface, the compensating probe and the sensor probe are arranged in a staggered manner.
In some embodiments of the present application, in some embodiments,
the compensating probes are more than two, the two compensating probes are all positioned in a plane perpendicular to the central axis of the rotor to be measured, and the two compensating probes are arranged at intervals along the circumferential direction.
In some embodiments of the present application, in some embodiments,
at least two of the compensating probes comprise one compensating probe arranged at a first circumferential position and one compensating probe arranged at a second circumferential position, wherein the second circumferential position is a position at which the second circumferential position is rotated by 90 degrees along the circumferential direction.
In some embodiments of the present application, in some embodiments,
at least two of the compensating probes include one compensating probe disposed at a third circumferential position, one compensating probe disposed at a fourth circumferential position, one compensating probe disposed at a fifth circumferential position, and one compensating probe disposed at a sixth circumferential position, the third circumferential position, the fourth circumferential position, the fifth circumferential position, and the sixth circumferential position being sequentially spaced apart by 90 ° in the circumferential direction.
The application also provides a motor which comprises the sensor assembly for detecting the displacement of the rotor.
The sensor component for detecting the rotor displacement and the motor provided by the application have the following beneficial effects:
1. according to the application, the sensor probe and the compensation probe are arranged, the sensor probe is opposite to the axial detection position, the displacement of the rotor relative to the axial direction and the radial direction can be detected and obtained, meanwhile, the compensation probe which is additionally arranged along the axial Z direction can be used for obtaining the displacement of the rotor relative to the radial direction, namely, the displacement in the X direction is detected, meanwhile, an X displacement signal is fed back to the sensor probe, and the axial displacement signal can be output through the subsequent operation; the radial displacement signal and the axial displacement signal of the rotor can be effectively decoupled respectively, the operation is simple and convenient, and the precision is high; compared with the Z-direction sensor in the background technology (the scheme of fig. 1), the axial detection ring is not required, the assembly efficiency is improved, the cost is reduced, displacement amounts in multiple directions can be output compared with the scheme of fig. 2, a higher-order coupling item is not provided compared with a differential structure in the background technology (the scheme of fig. 3), and the detection precision is high; compared with the prior art, the structure of the application realizes radial installation and detection of axial displacement of the probe without increasing the number of the sensor probes, has no high-order coupling item, avoids the problem of coupling in displacement output in different directions in the prior art, can realize the output of displacement signals in X, Z directions at the same time, can realize the effect of high detection precision, does not need to set too many structures, greatly compresses the axial dimensions of the sensor and the measured surface of the rotor, and has the advantages of high precision, low cost and compact space layout.
2. According to the application, by arranging the radial compensation probe, the opposite-side axial differential probe of the background technology of FIG. 3 is omitted, a conventional axial detection surface or an axial detection ring (FIG. 1) is not required to be processed, a sealing disc structure is not required to be added in the axial direction, and the axial length is shortened; the axial dimensions of the sensor and the rotor are shortened, and the space utilization rate is improved.
Drawings
Fig. 1 is a structural diagram of a prior art scheme 1;
fig. 2 is a structural diagram of a prior art scheme 2;
fig. 3 is a structural diagram of a prior art scheme 3;
fig. 4 is a structural diagram of a prior art scheme 4;
FIG. 5 is a front block diagram of a sensor assembly of the rotor displacement detection of the present application;
FIG. 6 is a perspective view of a sensor assembly for rotor displacement detection of the present application (embodiment 1);
FIG. 7 is a right side view of FIG. 6;
FIG. 8 is a perspective view of a sensor assembly for rotor displacement detection of the present application (embodiment 2);
fig. 9 is a right side view of fig. 8.
The reference numerals are:
1. a compensating probe; 2. a sensor probe; 3. a rotor to be measured; 31. axially detecting the position; 32. a first shaft section; 33. a second shaft section.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.
As shown in fig. 5-9, the present application provides a sensor assembly for rotor displacement detection, comprising:
the rotor 3 to be measured includes an axial detection position 31, the sensor probe 2 is disposed radially outside the axial detection position 31 so as to be opposite to the axial detection position 31 in a radial direction, the compensation probe 1 is disposed radially outside the rotor 3 to be measured and is not opposite to the axial detection position 31, a direction along a central axis direction of the rotor 3 to be measured is a Z-axis direction, a direction perpendicular to a radial plane of the Z-axis and passing through a center of the sensor probe 2 is an X-axis direction, and:
；
wherein: u (U) 1 : sensor probe voltage, U Compensation : compensating the probe voltage, K xx : radial quadratic term coefficient, K x : radial sensitivity, K z : axial sensitivity, K: coupling term coefficient, X: displacement of the rotor under test in the X-axis direction (i.e. radial displacement) Z: the displacement of the rotor to be measured along the Z-axis direction (i.e., axial displacement).
According to the application, the sensor probe and the compensation probe are arranged, the sensor probe is opposite to the axial detection position, the displacement of the rotor relative to the axial direction and the radial direction can be detected and obtained, meanwhile, the compensation probe which is additionally arranged along the axial Z direction can be used for obtaining the displacement of the rotor relative to the radial direction, namely, the displacement in the X direction is detected, meanwhile, an X displacement signal is fed back to the sensor probe, and the axial displacement signal can be output through the subsequent operation; the radial displacement signal and the axial displacement signal of the rotor can be effectively decoupled respectively, the operation is simple and convenient, and the precision is high; compared with the Z-direction sensor in the background technology (the scheme of fig. 1), the axial detection ring is not required, the assembly efficiency is improved, the cost is reduced, displacement amounts in multiple directions can be output compared with the scheme of fig. 2, a higher-order coupling item is not provided compared with a differential structure in the background technology (the scheme of fig. 3), and the detection precision is high; compared with the prior art, the structure of the application realizes radial installation and detection of axial displacement of the probe without increasing the number of the sensor probes, has no high-order coupling item, avoids the problem of coupling in displacement output in different directions in the prior art, can realize the output of displacement signals in X, Z directions at the same time, can realize the effect of high detection precision, does not need to set too many structures, greatly compresses the axial dimensions of the sensor and the measured surface of the rotor, and has the advantages of high precision, low cost and compact space layout.
The sensor assembly of the application comprises a radial sensor probe (i.e. a compensation probe 1), an axial sensor probe (i.e. a sensor probe 2) and a rotor 3 to be tested, wherein the rotor is provided with a specially arranged axial detection position 31 for realizing the axial displacement detection of the radial probe. By arranging the radial compensation probe, the opposite-side axial differential probe of the background technology of FIG. 3 is omitted, a conventional axial detection surface or an axial detection ring (FIG. 1) is not required to be processed, a sealing disc structure is not required to be added in the axial direction, and the axial length is shortened; the axial dimensions of the sensor and the rotor are shortened, and the space utilization rate is improved.
During detection, the signals of the 2 opposite radial sensor probes (namely, the compensation probes 1) are differentiated and then output radial displacement signals, 2 pairs of total 4 compensation probes 1 respectively output displacement signals in the radial X, Y direction of the rotor 3 to be detected, after coordinate system conversion is carried out on the displacement signals in the radial X, Y direction through a signal processing circuit, radial displacement signals of the axial sensor probe (namely, the sensor probe 2) corresponding to the radial angle can be obtained, and in the background technology, the radial displacement signals of the sensor probe 2 corresponding to the radial angle are obtained through calculation by the compensation probes 1 at the moment, the radial displacement signals and the axial displacement signals measured by the sensor probe 2 are subjected to compensation operation, and the radial displacement signals and the axial displacement signals measured by the sensor probe 2 can be separated, so that the sensor probe 2 outputs the axial displacement signals.
In some embodiments of the present application, in some embodiments,
the rotor 3 to be tested is a stepped shaft, the stepped shaft comprises a first shaft section 32 and a second shaft section 33 which are connected, the outer diameter of the first shaft section 32 is smaller than that of the second shaft section 33, so that a step surface is formed at the joint of the first shaft section 32 and the second shaft section 33, and the axial detection position 31 comprises the step surface;
the step surface is disposed opposite to the sensor probe 2 in the radial direction, and the compensation probe 1 is disposed radially outside the first shaft section 32 and not opposite to the step surface, or the compensation probe 1 is disposed radially outside the second shaft section 33 and not opposite to the step surface.
The application is a preferable structural form of the tested rotor, a stepped shaft is formed by connecting shaft sections with different outer diameters, a sensor probe is arranged at or near the stepped surface (the stepped surface and the sensor probe are arranged opposite to each other along the radial direction), and the sensor probe is fixed because the rotor can generate axial movement, so that the axial detection position is required to be always within the detection range of the sensor probe, the sensor probe corresponds to the axial detection position, and the moving stepped surface is required to be within the detection range of the sensor probe, so that the signal generated by the axial movement displacement of the stepped shaft can be effectively ensured and output; the compensating probe is arranged at a position which is not opposite to the step surface, so that the compensating probe detects the displacement of the rotor along the radial direction and generates signal output; finally, the axial displacement signal and the radial displacement signal can be obtained by decoupling the two signals.
In some embodiments of the present application, in some embodiments,
the first shaft section 32 coincides with the central axis of the second shaft section 33, the central axis takes the direction from the second shaft section 33 to the first shaft section 32 as the positive direction of the Z axis, the intersection of the plane of the step surface and the central axis is an O point, the center of the sensor probe 2 is opposite to the step surface, the connecting line direction of the O point to the center of the sensor probe 2 is the positive direction of the X axis, and the direction in the plane of the step surface and perpendicular to the X axis is the Y axis direction.
This is a particular form of the first and second axial segments of the present application, and X, Z and Y-direction, the first and second axial segments being coaxial axial segment structures, the Z-axis square being oriented from the second axial segment toward the first axial segment, as shown in fig. 5,O, and the line connecting the sensor probe to the X-axis square being in the same radial plane as the X-axis and perpendicular to the X-axis, as shown in fig. 5.
In some embodiments of the present application, in some embodiments,
the axial detection position 31 is a position of the step surface that is offset by a distance a toward the positive direction of the Z axis, where a is equal to or greater than 0, and/or the axial detection position 31 is a position of the step surface that is offset by a distance b toward the negative direction of the Z axis, where b is equal to or greater than 0.
This is a preferable positional relationship between the axial detection position and the step surface in the present application, and the axial detection position is opposite to the radial inner position of the sensor probe, and since the rotor is moving, there is a movement error in the left-right direction as viewed in fig. 5 with respect to the step surface as the center, and the sensor probe can effectively detect the signal of the axial detection position within the distance range of a to b, so as to output the signal of the axial displacement.
In some embodiments of the present application, in some embodiments,
the sensor probe 2 has a first preset distance spaced more than 0 from the radial outer periphery of the axial detection position 31, the compensation probe 1 is disposed radially outside the second shaft section 33 and has a second preset distance spaced more than 0 from the outer periphery of the second shaft section 33, and the compensation probe 1 has a third preset distance spaced more than 0 from the axial detection position 31 along the Z-axis direction.
The sensor probe and the compensation probe are in a preferable structural form of the axial detection position respectively, and the sensor probe is opposite to the axial detection position in the radial direction and is positioned at a position which is more than 0 distance outside the axial detection position so as to detect a displacement signal of the axial detection position; the compensation probe is not opposite to the axial detection position and is spaced by a third preset distance larger than 0 along the Z-axis direction, so that the axial detection position is located outside the detection range of the compensation probe, interference of the axial detection position on the radial displacement signal detection of the compensation probe is avoided, and the accuracy of the displacement output in the X, Z direction is effectively improved.
In some embodiments of the present application, in some embodiments,
the compensating probe 1 is offset from the sensor probe 2 in the axial projection plane toward the stepped surface. The compensation probe and the sensor spring are arranged in a staggered manner along the circumferential direction, so that the axial size of the whole sensor can be further effectively compressed, the axial volume can be further made smaller, and the space utilization rate is improved.
During assembly, the axial sensor probe (namely the sensor probe 2) needs to be aligned with the axial detection position 31, and the axial movement range of the rotor 3 to be detected needs to ensure that the axial detection position 31 is always within the detection range of the sensor probe 2; the 4 radial sensor probes (i.e. the compensating probes 1) are uniformly distributed along the circumferential direction of the rotor 3 to be measured, the axial detection position 31 needs to be avoided, and the axial movement range of the rotor 3 to be measured needs to ensure that the axial detection position 31 is always out of the detection range of the compensating probes 1. The radial sensor probe (compensation probe 1) and the axial sensor probe (sensor probe 2) are staggered by a certain angle in the circumferential direction, so that the axial dimension of the whole sensor can be further compressed.
In some embodiments of the present application, in some embodiments,
the number of the compensating probes 1 is more than two, the two compensating probes 1 are all positioned in a plane perpendicular to the central axis of the rotor 3 to be measured, and the two compensating probes 1 are arranged at intervals along the circumferential direction.
This is a preferred structural form of the compensation probe of the present application, and by means of two or more compensation probes, at least one of which is used for detecting the displacement signal of the rotor in the X direction and at least one of which is used for detecting the displacement signal of the rotor in the Y direction, the displacement output signals in the X, Y and Z3 directions can be outputted, thereby further improving the accuracy of displacement detection.
Example 2, as in fig. 8-9, in some embodiments,
at least two of the compensating probes 1 comprise one compensating probe arranged at a first circumferential position and one compensating probe arranged at a second circumferential position, which is a position at which the second circumferential position is rotated by 90 ° in the circumferential direction.
This is the preferred form of embodiment 2 of the application, i.e. comprising two compensating probes, one of which is spaced 90 ° apart from the other in the circumferential direction, from which different radial displacement signals can be detected to obtain displacement output signals in the X and Y directions.
The optimal implementation mode needs 4 radial sensor probes (i.e. compensation probes 1), mainly for improving the detection precision and reliability through the signal difference of 2 opposite radial sensor probes, if the requirements on the detection precision and reliability are not high, 2 radial sensor probes (i.e. compensation probes 1) can be installed only at intervals of 90 degrees along the circumferential direction of the rotor 3 to be detected, at this time, the axial sensor probe (i.e. sensor probe 2) can be installed at the opposite side of one radial sensor probe (compensation probe 1), and the coordinate system conversion part of a signal processing circuit in the optimal implementation mode can be omitted, so that the cost is further saved.
Example 1, as in fig. 6-7, in some embodiments,
at least two of the compensating probes 1 include one compensating probe disposed at a third circumferential position, one compensating probe disposed at a fourth circumferential position, one compensating probe disposed at a fifth circumferential position, and one compensating probe disposed at a sixth circumferential position, the third circumferential position, the fourth circumferential position, the fifth circumferential position, and the sixth circumferential position being sequentially spaced apart by 90 ° in the circumferential direction.
This is a preferred embodiment of embodiment 1 of the present application, i.e. comprising four compensating probes, wherein the 4 compensating probes are arranged at intervals of 90 ° in sequence in the circumferential direction, and the radial displacement signal in the X direction can be detected by at least 2 compensating probes at intervals of 180 °, and the radial displacement signal in the Y direction can be detected by at least 2 further compensating probes at intervals of 180 °.
The application also provides a motor which comprises the sensor assembly for detecting the displacement of the rotor.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application. The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.
Claims (10)
1. A sensor assembly for rotor displacement detection, characterized by: comprising the following steps:
the device comprises a rotor (3) to be measured, a sensor probe (2) and a compensation probe (1), wherein the rotor (3) to be measured comprises an axial detection position (31), the sensor probe (2) is arranged on the outer radial side of the axial detection position (31) to be opposite to the axial detection position (31) in the radial direction, the compensation probe (1) is arranged on the outer radial side of the rotor (3) to be measured and is not opposite to the axial detection position (31), the direction along the central axis of the rotor (3) to be measured is the Z-axis direction, the direction perpendicular to the radial plane of the Z-axis and passing through the center of the sensor probe (2) is the X-axis direction, and the device comprises:
；
wherein: u (U) 1 : sensor probe voltage, U Compensation : compensating the probe voltage, K xx : radial quadratic term coefficient, K x : radial sensitivity, K z : axial sensitivity, K: coupling term coefficient, X: displacement of the rotor to be measured along the X-axis direction, Z: and the displacement of the rotor to be measured along the Z-axis direction.
2. The rotor displacement detecting sensor assembly of claim 1, wherein:
the rotor (3) to be tested is a stepped shaft, the stepped shaft comprises a first shaft section (32) and a second shaft section (33) which are connected, the outer diameter of the first shaft section (32) is smaller than that of the second shaft section (33), so that a step surface is formed at the joint of the first shaft section (32) and the second shaft section (33), and the axial detection position (31) comprises the step surface;
the sensor probe (2) is arranged opposite to the step surface along the radial direction;
the compensation probe (1) is arranged on the radial outer side of the first shaft section (32) and is not opposite to the step surface, or the compensation probe (1) is arranged on the radial outer side of the second shaft section (33) and is not opposite to the step surface.
3. The rotor displacement detecting sensor assembly of claim 2, wherein:
the first shaft section (32) and the central axis of the second shaft section (33) are overlapped, the direction of the central axis from the second shaft section (33) to the first shaft section (32) is the positive direction of the Z shaft, the intersection of the plane of the step surface and the central axis is an O point, the center of the sensor probe (2) is opposite to the step surface, the connecting line direction of the O point to the center of the sensor probe (2) is the positive direction of the X shaft, and the direction which is in the plane of the step surface and perpendicular to the X shaft is the Y shaft direction.
4. The rotor displacement detecting sensor assembly of claim 2, wherein:
the axial detection position (31) is a position of the step surface which is offset by a distance of a towards the positive direction of the Z axis, wherein a is more than or equal to 0, and/or the axial detection position (31) is a position of the step surface which is offset by a distance of b towards the negative direction of the Z axis, wherein b is more than or equal to 0.
5. The rotor displacement detecting sensor assembly of claim 2, wherein:
the sensor probe (2) has a first preset distance greater than 0 from the radial outer circumference of the axial detection position (31), the compensation probe (1) is arranged radially outside the second shaft section (33) and has a second preset distance greater than 0 from the outer circumference of the second shaft section (33), and the compensation probe (1) has a third preset distance greater than 0 from the axial detection position (31) along the Z-axis direction.
6. The rotor displacement detecting sensor assembly of claim 2, wherein:
in an axial projection plane facing the step surface, the compensating probe (1) and the sensor probe (2) are arranged in a staggered manner.
7. The rotor displacement detecting sensor assembly of any one of claims 1-6, wherein:
the number of the compensating probes (1) is more than two, the two compensating probes (1) are all positioned in a plane perpendicular to the central axis of the rotor (3) to be measured, and the two compensating probes (1) are arranged at intervals along the circumferential direction.
8. The rotor displacement detecting sensor assembly of claim 7, wherein:
at least two of the compensating probes (1) comprise one compensating probe arranged at a first circumferential position and one compensating probe arranged at a second circumferential position, which is a position at which the first circumferential position is rotated by 90 ° in the circumferential direction.
9. A sensor assembly for rotor displacement detection according to claim 7 or 8, wherein:
at least two of the compensating probes (1) comprise one compensating probe arranged at a third circumferential position, one compensating probe arranged at a fourth circumferential position, one compensating probe arranged at a fifth circumferential position and one compensating probe arranged at a sixth circumferential position, wherein the third circumferential position, the fourth circumferential position, the fifth circumferential position and the sixth circumferential position are sequentially spaced by 90 degrees in the circumferential direction.
10. An electric motor, characterized in that: a sensor assembly comprising the rotor displacement detection of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310910195.2A CN116907401A (en) | 2023-07-24 | 2023-07-24 | Sensor assembly for rotor displacement detection and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310910195.2A CN116907401A (en) | 2023-07-24 | 2023-07-24 | Sensor assembly for rotor displacement detection and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116907401A true CN116907401A (en) | 2023-10-20 |
Family
ID=88367774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310910195.2A Pending CN116907401A (en) | 2023-07-24 | 2023-07-24 | Sensor assembly for rotor displacement detection and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116907401A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119469055A (en) * | 2024-11-12 | 2025-02-18 | 浙江大学 | A method and device for detecting the spatial posture of a magnetic suspension pump rotor |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1518717A (en) * | 1975-10-07 | 1978-07-26 | Teldix Gmbh | Magnetic bearing arrangement |
| EP0819861A2 (en) * | 1996-07-18 | 1998-01-21 | Seiko Seiki Kabushiki Kaisha | Magnetic bearing devices |
| KR20110116717A (en) * | 2010-04-20 | 2011-10-26 | 한국기계연구원 | Force measuring device of motor |
| US20150026847A1 (en) * | 2013-07-18 | 2015-01-22 | National Taiwan University | Radio-frequency reflectometry scanning tunneling microscope |
| CN105115453A (en) * | 2015-04-27 | 2015-12-02 | 南京林业大学 | Device and method for on-line measurement of abrasion loss of mechanical sealing end face based on technology of digital B-ultrasound imaging |
| CN205300548U (en) * | 2016-01-12 | 2016-06-08 | 天津飞旋科技研发有限公司 | Rotor axial displacement detecting system |
| CN105716515A (en) * | 2014-12-04 | 2016-06-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Current vortex sensor |
| CN205593500U (en) * | 2015-12-14 | 2016-09-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Axial displacement detection device and magnetic suspension bearing |
| CN108809154A (en) * | 2018-06-14 | 2018-11-13 | 珠海格力电器股份有限公司 | Novel magnetic suspension high-speed motor and method for detecting position of motor rotor |
| CN111486112A (en) * | 2019-01-29 | 2020-08-04 | 青岛海尔智能技术研发有限公司 | Magnetic levitation centrifugal compressor and air conditioning system |
| CN112564398A (en) * | 2019-05-13 | 2021-03-26 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| US20210156717A1 (en) * | 2018-01-30 | 2021-05-27 | Mecos Ag | Contactless radial position sensor having improved response behavior to target defects |
| US20210175777A1 (en) * | 2017-12-08 | 2021-06-10 | Moving Magnet Technologies | Compact control valve |
| CN215058912U (en) * | 2020-12-02 | 2021-12-07 | 南京理工大学 | A new type of gap sensor-based magnetic bearing control system |
| CN114483635A (en) * | 2022-01-26 | 2022-05-13 | 广东美的暖通设备有限公司 | Magnetic bearing system, compressor and air conditioner |
| CN115435768A (en) * | 2022-09-29 | 2022-12-06 | 中国人民解放军火箭军工程大学 | Hemispherical resonant gyroscope temperature modeling compensation method based on real-time sliding window |
| CN116428954A (en) * | 2023-03-16 | 2023-07-14 | 珠海格力电器股份有限公司 | A shaft radial displacement detection device and detection method |
| CN220270404U (en) * | 2023-07-24 | 2023-12-29 | 珠海格力电器股份有限公司 | Sensor assembly for rotor displacement detection and motor |
-
2023
- 2023-07-24 CN CN202310910195.2A patent/CN116907401A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1518717A (en) * | 1975-10-07 | 1978-07-26 | Teldix Gmbh | Magnetic bearing arrangement |
| EP0819861A2 (en) * | 1996-07-18 | 1998-01-21 | Seiko Seiki Kabushiki Kaisha | Magnetic bearing devices |
| KR20110116717A (en) * | 2010-04-20 | 2011-10-26 | 한국기계연구원 | Force measuring device of motor |
| US20150026847A1 (en) * | 2013-07-18 | 2015-01-22 | National Taiwan University | Radio-frequency reflectometry scanning tunneling microscope |
| CN105716515A (en) * | 2014-12-04 | 2016-06-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Current vortex sensor |
| CN105115453A (en) * | 2015-04-27 | 2015-12-02 | 南京林业大学 | Device and method for on-line measurement of abrasion loss of mechanical sealing end face based on technology of digital B-ultrasound imaging |
| CN205593500U (en) * | 2015-12-14 | 2016-09-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Axial displacement detection device and magnetic suspension bearing |
| CN205300548U (en) * | 2016-01-12 | 2016-06-08 | 天津飞旋科技研发有限公司 | Rotor axial displacement detecting system |
| US20210175777A1 (en) * | 2017-12-08 | 2021-06-10 | Moving Magnet Technologies | Compact control valve |
| US20210156717A1 (en) * | 2018-01-30 | 2021-05-27 | Mecos Ag | Contactless radial position sensor having improved response behavior to target defects |
| CN108809154A (en) * | 2018-06-14 | 2018-11-13 | 珠海格力电器股份有限公司 | Novel magnetic suspension high-speed motor and method for detecting position of motor rotor |
| CN111486112A (en) * | 2019-01-29 | 2020-08-04 | 青岛海尔智能技术研发有限公司 | Magnetic levitation centrifugal compressor and air conditioning system |
| CN112564398A (en) * | 2019-05-13 | 2021-03-26 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN112564400A (en) * | 2019-05-13 | 2021-03-26 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN215058912U (en) * | 2020-12-02 | 2021-12-07 | 南京理工大学 | A new type of gap sensor-based magnetic bearing control system |
| CN114483635A (en) * | 2022-01-26 | 2022-05-13 | 广东美的暖通设备有限公司 | Magnetic bearing system, compressor and air conditioner |
| CN115435768A (en) * | 2022-09-29 | 2022-12-06 | 中国人民解放军火箭军工程大学 | Hemispherical resonant gyroscope temperature modeling compensation method based on real-time sliding window |
| CN116428954A (en) * | 2023-03-16 | 2023-07-14 | 珠海格力电器股份有限公司 | A shaft radial displacement detection device and detection method |
| CN220270404U (en) * | 2023-07-24 | 2023-12-29 | 珠海格力电器股份有限公司 | Sensor assembly for rotor displacement detection and motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119469055A (en) * | 2024-11-12 | 2025-02-18 | 浙江大学 | A method and device for detecting the spatial posture of a magnetic suspension pump rotor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5667723B1 (en) | Force sensor | |
| JP5834292B2 (en) | Current sensor | |
| CN102175207B (en) | High-accuracy roundness detection method based on combination of reverse and multi-sensor methods | |
| CN103229024A (en) | A sensor assembly and a method for determining a spatial position of a first part relative to a second part | |
| CN109781329B (en) | Six-dimensional force sensor with six-beam structure | |
| CN109032070A (en) | A kind of contactless R-test measuring instrument scaling method using eddy current displacement sensor | |
| CN107314737B (en) | A radial measurement method for axial displacement of magnetic suspension rotor | |
| CN109781328B (en) | Six-dimensional force sensor with eight-beam structure | |
| CN220270404U (en) | Sensor assembly for rotor displacement detection and motor | |
| CN116379899B (en) | Magnetic position sensor devices, methods, and systems with error detection | |
| CN116907401A (en) | Sensor assembly for rotor displacement detection and motor | |
| CN116428954B (en) | A shaft radial displacement detection device and detection method | |
| US11099243B2 (en) | Differential magnetic load cells for compact low-hysteresis force and torque measurements | |
| CN110940296A (en) | A method for measuring rudder deflection angle of hypersonic aircraft | |
| CN118816971A (en) | A method and system for compensating the angular measurement error of a circular grating encoder shaft system | |
| JP2010014695A (en) | Multiaxial sensor | |
| CN113865473B (en) | Magnetic suspension motor system and rotor displacement detection device and method thereof | |
| US20120297878A1 (en) | Micromechanical Angular Acceleration Sensor and Method for Measuring an Angular Acceleration | |
| CN110044613B (en) | Rotor six-degree-of-freedom motion test based on shaft and disk and its motion parameter decoupling method | |
| CN113566887B (en) | Suspension motor rotor suspension position, deflection angle and rotating speed integrated detection system and application | |
| CN208688449U (en) | Double read head grating angle-measuring equipments | |
| CN116164687B (en) | Workpiece size measuring method and device | |
| CN222747975U (en) | Real-time self-compensation metrology turntable for shaft angle measurement error based on circular grating encoder | |
| CN110657768B (en) | Method for measuring axial and radial displacements of rotor by utilizing conical surface | |
| CN106871857B (en) | A device and method for detecting the bending deflection of a ball screw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |