WO2019241977A1 - Rotating component temperature monitoring system - Google Patents

Abstract

A rotating component temperature monitoring system, comprising a rotating component (4) and an infrared radiation intensity monitoring device. The infrared radiation intensity monitoring device comprises an induction probe (2) facing the end surface of the rotating component, and a gap exists between an induction end of the induction probe (2) and the end surface of the rotating component (4); and the infrared radiation intensity monitoring device further comprises a signal processing device and a power supply module, and the signal processing device is connected to the induction probe (2) and the power supply module. The induction probe (2) collects infrared radiation of the end surface of the rotating component (4), after processing, the surface temperature and the temperature field distribution of the rotating component (4) are calculated according to an algorithm, distributed detection is adopted, the measurement result is more accurate, the temperature of the rotating component (4) can be effectively monitored, motor rotor winding insulation failure or permanent magnet synchronous motor rotor demagnetization due to excessive rotor temperature can be avoided, motor performance degradation is prevented, and the motor reliability is high.

Description

Temperature monitoring system for rotating parts Technical field

The invention belongs to the technical field of motors or temperature monitoring, and particularly relates to a temperature monitoring system for rotating parts.

Background technique

Because the rotor of the motor is in a strong electric field, strong magnetic field, and high-speed rotation, the temperature of the rotor is often difficult to measure. The temperature of the rotor is an important parameter for the operation of the motor. When the temperature is too high, it may cause insulation failure of the rotor windings of the motor or demagnetization of the rotor of the permanent magnet synchronous motor, which will reduce the performance of the motor and even make it unusable. Therefore, the temperature monitoring of the rotor is of great significance to ensure the safe operation of the motor.

In the prior art, the rotor temperature measurement method is mostly embedded in the stator slot. The sensor is oriented toward the cylindrical side of the rotor. The disadvantage is that many motors (especially small motors) have a small gap between the stator and the rotor, and the stator slots It is difficult to fix and install, and the holes in the stator will cause damage to the motor structure and magnetic circuit, and the reliability is not good.

technical problem

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a temperature monitoring system for rotating parts, which has high reliability.

Technical solutions

The technical solution of the present invention is: a rotating component temperature monitoring system, comprising a rotating component and an infrared radiation intensity monitoring device, the infrared radiation intensity monitoring device includes an induction probe facing the end surface of the rotating component, There is a gap between the end and the end surface of the rotating component; the infrared radiation intensity monitoring device further includes a signal processing device and a power module, and the signal processing device is connected to the induction probe and the power module.

Optionally, the sensing probe is provided with at least one group, and at least one of the sensing probes in each group is arranged along a radial interval of the rotating member.

Optionally, the sensing probes are provided with at least one group, and the sensing probes of each group are arranged at intervals along the circumferential direction of the rotating member.

Optionally, the inductive probe is an optical fiber probe, and the optical fiber probe is connected to the signal processing device through an optical fiber wire.

Optionally, the sensing probe is an infrared probe, and the infrared probe is connected with a transmitter module, and the transmitter module is connected to the signal processing device through a transmission wire.

Optionally, the rotating member is disposed in a housing, and a bracket is fixedly disposed in the housing. The bracket is provided with a mounting hole for fixing the sensing probe, and a side wall of the housing is provided with a bracket for fixing the bracket. Fixing hole.

Optionally, the bracket is provided with a bracket groove for receiving an optical fiber wire or a transmission wire.

Optionally, the rotating member is disposed in a housing, and an end cover is connected to the housing, the end cover faces an end surface of the rotating member, and the induction probe is fixed on the end cover.

Optionally, the rotating component is a motor rotor.

Optionally, a display or a host computer is connected to the signal processing device.

Beneficial effect

An embodiment of the present invention provides a temperature monitoring system for a rotating component. The present invention uses an inductive probe (optical fiber probe or infrared probe and transmitter) to collect infrared radiation from the end surface of a rotating component (motor rotor), and calculates it according to an algorithm after processing. Surface temperature; on the basis of the measured rotating parts (motor rotor), the mathematical model is used to estimate the temperature distribution of the rotating parts (motor rotor). In addition, multiple inductive probes can be set, and distributed detection is used to make the measurement results more accurate. In addition, the designed bracket is easy to install or modify, and it will not cause any damage to the stator and rotor of the motor. It can avoid the failure of the rotor winding insulation of the motor due to the high temperature of the rotor or the demagnetization of the permanent magnet synchronous motor to prevent the performance of the motor. Reduced, motor reliability is high.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present invention more clearly, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can obtain other drawings according to these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a temperature monitoring system based on an optical fiber probe in a temperature monitoring system of a rotating component according to an embodiment of the present invention;

2 is a schematic diagram of a monitoring system based on an optical fiber probe in a temperature monitoring system of a rotating component according to an embodiment of the present invention;

3 is a schematic diagram of a temperature monitoring system based on an infrared probe in a temperature monitoring system for a rotating component according to an embodiment of the present invention;

4 is a schematic diagram of a monitoring system based on an infrared probe in a temperature monitoring system for a rotating component according to an embodiment of the present invention;

5 is a schematic perspective view of a bracket in a temperature monitoring system for a rotating component according to an embodiment of the present invention;

6 is a schematic plan view of a bracket in a temperature monitoring system for a rotating component according to an embodiment of the present invention;

7 is a schematic plan view of an end cap mounted with a sensing probe in a temperature monitoring system for a rotating component according to an embodiment of the present invention;

FIG. 8 is a schematic plan view of an induction probe mounted on an end cap in a temperature monitoring system for a rotating component according to an embodiment of the present invention.

Embodiments of the invention

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

It should be noted that when an element is referred to as "fixed to" or "disposed to" another element, it may be directly on the other element or there may be a centered element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should also be noted that the terms such as left, right, up, and down in the embodiments of the present invention are merely relative concepts or reference to the normal use status of the product, and should not be considered as restrictive. .

As shown in FIG. 1 to FIG. 4, a temperature monitoring system for a rotating component according to an embodiment of the present invention includes a rotating component 4 and an infrared radiation intensity monitoring device. The rotating component 4 may be disposed in a housing. The rotating member 4 may be a rotating device such as a motor rotor. In this embodiment, the rotating member 4 is taken as an example of a motor rotor. The motor rotor is disposed in the frame or the casing 6. The casing 5 is also provided with a stator 5. It is arranged in the stator 5 and the motor rotor is connected with a rotating shaft 7. The infrared radiation intensity monitoring device includes an inductive probe 2 facing the end surface of the rotating member 4. There is a gap between the inductive end of the inductive probe 2 and the end surface of the rotating member 4. The inductive probe 2 is not in contact with the rotating member 4, and the inductive probe 2 will not affect The rotation of the rotating part 4; the infrared radiation intensity monitoring device further includes a signal processing device and a power module. The signal processing device is connected to the sensing probe 2 and the power module. The power module can supply power to the signal processing device and the sensing probe 2. The power module can be externally connected. Power supply. The signal processing device and the power module may be located outside the casing 6. The induction probe 2 faces the end of the rotor of the motor. There is no need to place a sensor between the stator 5 and the rotor, and there is no need to make a hole in the stator 5. It can be used in fields such as micro and small motors, and will not cause motor structure and magnetic circuit. Destruction, good reliability. The sensing probe 2 collects and monitors the end surface temperature of the rotating component 4 in real time, and can directly obtain the temperature of the end surface of the rotating component 4 through the signal processing device, and can estimate the temperature of the other surface or other position of the motor rotor according to this. The signal processing device may have a built-in The data and algorithm can be used to obtain the relationship between the end surface temperature of the rotating component 4 and the temperature of other positions through a limited number of experiments and establish a data model. It can monitor the temperature of the rotating component 4 in real time and accurately, which is beneficial to control the temperature of the rotating component 4 at the set value. If the detected temperature exceeds the set range, the signal processing device can alarm or control the rotation speed or torque of the rotating component 4 within the preset range. When applied to the field of motors, it can avoid the motor caused by the high temperature of the rotor. Rotor winding insulation failure or permanent magnet synchronous motor rotor demagnetization, preventing motor performance degradation and high motor reliability.

Specifically, the signal processing device is connected with a display or a host computer, and can output temperature data in a set form. The signal processing module converts the input electric signal through amplification filtering, A / D conversion, calculates the temperature value by the microprocessor according to the built-in algorithm, and outputs it to the display or host computer in real time. The signal processing device may also be connected with a wireless transmission module, such as a 4G communication module, a WIFI module, a Bluetooth module, etc., and the data can be uploaded to the designated terminal device wirelessly.

Specifically, the sensing probes 2 are provided with at least one group, and at least one or at least two sensing probes 2 in each group are uniformly arranged along a radial interval of the rotating member 4 to detect the temperature of different positions of the rotating member 4.

Specifically, the sensing probes 2 are provided with at least one group or at least two groups, and the sensing probes 2 of each group are arranged at intervals along the circumferential direction of the rotating member 4 to improve the accuracy of temperature detection.

As shown in FIG. 1 and FIG. 2, as one embodiment of the inductive probe 2, the inductive probe 2 may be an optical fiber probe. The optical fiber probe is connected to the signal processing device through an optical fiber wire 3, and the optical fiber wire 3 may pass through the housing 6. That is, the optical fiber probe is transmitted to the infrared conversion module through the optical fiber. The infrared conversion module uses a thermal detector or a photoelectric converter to convert the radiation signal into an electrical signal.

As shown in FIG. 3 and FIG. 4, as another embodiment of the sensing probe 2, the sensing probe 2 may be an infrared probe. The infrared probe is connected with a transmitter module, and the transmitter module is connected to the signal processing device through a transmission wire 3. . The transmitter module can be provided with a thermal detector or a photoelectric converter to directly convert infrared radiation signals into electrical signals.

As shown in FIG. 5 and FIG. 6, as the first fixing scheme of the sensing probe 2, the rotating member 4 may be disposed in the housing 6, and a bracket 1 for fixing the sensing probe 2 is fixedly disposed in the housing 6. A mounting hole for fixing the sensing probe 2 is provided, and a fixing hole for fixing the bracket 1 is provided on the side wall of the housing 6. The fixing hole may be provided with one or more, and the optical fiber wire 3 or the transmission wire 3 may be passed through one of the fixing holes.出壳 6。 6 out of the shell.

Specifically, the bracket 1 is provided with a groove of the bracket 1 for accommodating the optical fiber wire or the transmission wire 3 in order to receive and protect the optical fiber wire and the transmission wire 3.

Specifically, the bracket 1 may include a semi-circular main bracket 1 and an overhang rod integrally connected to the main bracket 1, and an end portion of the overhang rod may be caught in a fixing hole. The groove of the bracket 1 can be provided on the surface of the main bracket 1 and the outrigger. The mounting holes may be provided on the main bracket 1 or on the main bracket 1 and the outrigger. The material of the bracket 1 may be metal, plastic or ceramic.

As shown in FIG. 7 and FIG. 8, as the second fixing scheme of the sensing probe 2, the rotating member 4 is disposed in the housing 6, and an end cover is connected to the housing 6. The end cover faces the end surface of the rotating member 4. 2 is fixed on the end cover, that is, there is no need to provide an additional bracket 1, the sensor probe 2 is directly fixed to the end cover, and the end cover is used as the bracket 1, which is convenient for installation, modification and maintenance.

An embodiment of the present invention provides a rotating component temperature monitoring system. The present invention uses an inductive probe 2 (optical fiber probe or infrared probe and transmitter) to collect infrared radiation from the end surface of a rotating component 4 (motor rotor). Calculate the surface temperature; on the basis of the measured rotating part 4 (motor rotor), use a mathematical model to estimate the temperature distribution of the rotating part 4 (motor rotor). In addition, multiple inductive probes 2 can be provided and distributed detection is used. The measurement results are more accurate. In addition, the designed bracket 1 is easy to install or modify, and will not cause any damage to the stator and rotor of the motor. It can avoid the failure of the rotor winding insulation of the motor due to the high temperature of the rotor or the demagnetization of the permanent magnet synchronous motor to prevent the motor. Reduced performance and high motor reliability.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (10)

A rotating component temperature monitoring system is characterized in that it includes a rotating component and an infrared radiation intensity monitoring device. The infrared radiation intensity monitoring device includes an inductive probe facing an end surface of the rotating component. There is a gap between the end faces of the rotating parts; the infrared radiation intensity monitoring device further includes a signal processing device and a power module, and the signal processing device is connected to the induction probe and the power module. The temperature monitoring system for a rotating component according to claim 1, wherein the sensing probes are provided with at least one group, and at least one of the sensing probes in each group is arranged along a radial interval of the rotating component. Zh The temperature monitoring system for a rotating component according to claim 2, wherein the sensing probe is provided with at least one group, and the sensing probes of each group are arranged at intervals along the circumferential direction of the rotating component. The temperature monitoring system for a rotating component according to any one of claims 1 to 3, wherein the sensing probe is an optical fiber probe, and the optical fiber probe is connected to the signal processing device through an optical fiber wire. The temperature monitoring system for rotating parts according to any one of claims 1 to 3, wherein the sensing probe is an infrared probe, and the infrared probe is connected with a transmitter module, and the transmitter module Connected to the signal processing device via a transmission line. The temperature monitoring system for a rotating component according to any one of claims 1 to 3, wherein the rotating component is disposed in a casing, a bracket is fixedly disposed in the casing, and the bracket is provided with A mounting hole for fixing the sensing probe, and a fixing hole for fixing a bracket is provided on a side wall of the casing. The temperature monitoring system for a rotating component according to claim 6, wherein the bracket is provided with a bracket groove for receiving an optical fiber wire or a transmission wire. The temperature monitoring system for a rotating component according to any one of claims 1 to 3, wherein the rotating component is disposed in a housing, the housing is connected with an end cover, and the end cover faces toward The end face of the rotating member, and the induction probe is fixed on the end cover. The temperature monitoring system for a rotating component according to any one of claims 1 to 3, wherein the rotating component is a motor rotor. The temperature monitoring system for a rotating component according to any one of claims 1 to 3, wherein a display or a host computer is connected to the signal processing device.