CN207832163U - A kind of shaft centerline measurement device - Google Patents

Abstract

The utility model proposes an axis measurement device, which relates to the technical field of generator set installation. The axis measurement device includes a reference unit and a measurement unit arranged at intervals along the axial direction. The reference unit has a reference base, a first laser rangefinder and a digital telescope. The first A laser rangefinder and a digital telescope are installed on the first installation axis of the reference base, the first laser rangefinder can rotate around the first installation axis and the laser emitted by it is perpendicular to the axis of the reference base, the collimation of the digital telescope The axis coincides with the axis of the reference base; the measuring unit has a measuring base and a second laser rangefinder, the second laser rangefinder is installed on the measuring base and can rotate around the axis of the measuring base, and the laser emitted by the second laser rangefinder Vertical to the axis of the measuring base, a scale line is provided on the end surface of the measuring base facing the reference unit, and the zero point of the scale line coincides with the axis of the measuring base. The axis measuring device and method can reduce human error and shorten measurement time.

Description

An axis measuring device

technical field

The utility model relates to the technical field of generator set installation, in particular to an axis measuring device.

Background technique

Generator assembly machine and equipment overhaul all involve the installation of rotating and fixed parts. The coaxiality of the rotating parts of the hydro-generator set is an important indicator of its installation quality. Among them, the axis of the hydro-generator set includes the main axis of the generator, the overall axis after the shaft is connected between the generator and the turbine, and the axis at the commutator of the exciter and the slip ring. The measurement and adjustment of these axes can be carried out step by step, or Together, the measurement and adjustment of the rotation axis of the generator set is an important task.

However, at present, the measurement of the axis of the generating set mostly uses more transmission tools and methods. The principle of the most common piano wire earphone method is to use tools such as piano wire, weight, centering frame, inner diameter dial, wire, earphone, and elevation axis frame. Firstly, determine the position of the benchmark components of the generator set and install them securely. Taking the vertical hydro-generator unit as an example, the lower labyrinth ring of the hydro-turbine located at the bottom of the unit is sealed and installed first, and the axis of the lower labyrinth ring is used as the rotation axis of the hydro-generator unit. In order to visualize the axis of rotation, it is necessary to install a center finder from the uppermost frame of the hydro-generator set, and lower down a piano wire with a plumb so that the piano wire coincides with the axis of the lower labyrinth ring. In this way, the piano wire is the axis of the generator set, and each component with a coaxiality relationship measures the distance from the piano wire by the measurer holding an inner micrometer, and judges the distance between the inner micrometer and the piano wire through the current feedback in the earphone Contact conditions, and then adjust the installation position of the components, and finally make the coaxiality of each component meet the installation requirements.

The piano wire earphone method has the following problems in the implementation process: 1, the efficiency is low, and each part needs to measure the distance with the piano wire repeatedly before and after adjustment. 2. The reliability is relatively low. The piano wire earphone method is affected by the difference in the feeling of the measuring person, and the measured data is often different. The same measuring person may have different measurement results at different positions.

Therefore, it is very urgent to develop an axis measuring device to avoid human error and improve work efficiency.

Utility model content

The purpose of the utility model is to provide an axis measuring device, which can reduce human error and shorten measurement time.

In order to achieve the above purpose, the utility model proposes an axis measuring device, wherein the axis measuring device includes:

The reference unit has a reference base, a first laser range finder and a digital telescope, the first laser range finder and the digital telescope are installed on the reference base, and the first laser range finder can circle the The axis of the reference base rotates, and the laser emitted by the first laser rangefinder is perpendicular to the axis of the reference base, and the line-of-sight axis of the digital telescope coincides with the axis of the reference base;

The measuring unit has a measuring base and a second laser rangefinder, the second laser rangefinder is installed on the measuring base and can rotate around the axis of the measuring base, and the laser rangefinder emitted by the second laser rangefinder The laser is perpendicular to the axis of the measurement base, and the end surface of the measurement base facing the reference unit is provided with a scale line, and the zero point of the scale line coincides with the axis of the measurement base.

The above-mentioned axis measuring device, wherein, the reference base has a first installation shaft protruding along its axis, and the first laser range finder is installed on the first installation shaft and can rotate around the first installation shaft. The installation shaft rotates, the digital telescope is installed on the end of the first installation shaft, and the end surface of the other end of the measurement base facing away from the scale line is provided with a second protrusion protruding along the axis of the measurement base. An installation shaft, the second laser range finder is installed on the second installation shaft and can rotate around the second installation shaft.

The axis measuring device as described above, wherein both the reference base and the measurement base are disc-shaped, the measurement bases are arranged above the reference base at intervals, and the first installation shaft is arranged on the reference base The upper surface of the base, the second installation shaft is set on the upper surface of the measurement base, and the scale line is set on the lower surface of the measurement base.

The above-mentioned axis measuring device, wherein a horizontally arranged indium steel ruler is installed on the lower surface of the measurement base, and the scale line is arranged on the indium steel ruler.

The above-mentioned axis measuring device, wherein a level sensor is provided on both the reference base and the measurement base.

The axis measuring device as described above, wherein the level sensor is an electronic level.

The above-mentioned axis measuring device, wherein, adjustment mechanisms are provided on the reference base and the measurement base, and each adjustment mechanism includes a base and four adjustment bolts, and the base is in the form of a cylinder shape and set outside the reference base or the measurement base, each of the adjustment bolts penetrates the side wall of the base and abuts against the reference base or the measurement base, each of the The adjusting bolts are all threadedly matched with the base, and the four adjusting bolts are evenly distributed along the circumference of the base.

The above-mentioned axis measurement device, wherein, the measurement device further includes a reference bracket and a measurement bracket, the reference unit is arranged on the reference bracket; the measurement unit is arranged on the measurement bracket.

Compared with the prior art, the utility model has the following characteristics and advantages:

The axis measuring device proposed by the utility model uses the first laser range finder and the second laser range finder to quickly determine the position of the axis of the reference component and the axis of the component to be measured, and then realizes the rapid measurement of the concentricity deviation of the two components. The high-precision laser range finder improves the measurement accuracy, uses the electronic reading of the laser range finder to replace the manual reading, reduces human error, shortens the time-consuming measurement, and at the same time can complete the measurement with fewer people, reduces labor costs, and improves measurement efficiency.

In the work of adjusting the rotation axis of the generator set, the axis measuring device proposed by the utility model is used to measure the concentricity deviation data of the two components, and then the rotation axis of the generator set is adjusted according to the above data, which can improve the adjustment efficiency of the rotation axis of the generator set.

Description of drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help the understanding of the present utility model, and do not specifically limit the shapes and proportional dimensions of the various components of the present utility model. Under the teaching of the utility model, those skilled in the art can choose various possible shapes and proportional dimensions according to specific conditions to implement the utility model.

Fig. 1 is the structural representation (1) of reference unit in the utility model;

Fig. 2 is the structural representation (two) of reference unit in the utility model;

Fig. 3 is the structural representation (three) of reference unit in the utility model;

Fig. 4 is the structural representation (1) of measuring unit in the utility model;

Fig. 5 is the structural representation (two) of measuring unit in the utility model;

Fig. 6 is the structural representation (three) of measuring unit in the utility model;

Fig. 7 is the schematic diagram (1) of the utility model axis measuring method;

Fig. 8 is a schematic diagram (2) of the central axis measuring method of the present invention.

Explanation of reference signs:

110. Reference unit; 111. Reference base;

112. The first laser range finder; 1111. The first installation shaft;

113. Digital telescope; 120. Measuring unit;

121. Measuring base; 1211. Second installation shaft;

122. The second laser range finder; 123. Indium steel ruler;

130. Level sensor; 140. Adjustment mechanism;

141. Base; 142. Adjusting bolts;

200. A reference component; 300. A component to be measured.

Detailed ways

The details of the utility model can be understood more clearly in combination with the accompanying drawings and the description of the specific implementation of the utility model. However, the specific implementations of the utility model described here are only for the purpose of explaining the utility model, and cannot be construed as limiting the utility model in any way. Under the teaching of the present utility model, any possible deformation based on the present utility model can be conceived by a skilled person, and these should be regarded as belonging to the scope of the present utility model.

Please refer to Fig. 1 to Fig. 8, the axis measurement device that the utility model proposes comprises the reference unit 110 and the measurement unit 120 that are arranged at intervals along the axial direction of the axial measurement device, as shown in Fig. 1 to Fig. 3, the reference unit 110 has a reference Base 111, first laser range finder 112 and digital telescope 113, the first laser range finder 112 and digital telescope 113 are all installed on the first installation shaft 1111, the first laser range finder 112 can be around the axis of reference base 111 Rotate, and the laser that the first laser rangefinder 112 emits is perpendicular to the axis of the reference base 111, and the line of sight of the digital telescope 113 (that is, the line of sight of the digital telescope 113) coincides with the axis of the reference base 111; 6, the measuring unit 120 has a measuring base 121 and a second laser range finder 122, the second laser range finder 122 is installed on the measuring base 121 and can rotate around the axis of the measuring base 121, the second laser range finder 122 The emitted laser is perpendicular to the axis of the measurement base 121 , and the end surface of the measurement base 121 facing away from the reference unit 110 is provided with a scale line, and the zero point of the scale line coincides with the axis of the measurement base 121 .

The utility model also relates to a method for measuring the axis of a generating set, using the above-mentioned axis measuring device, as shown in Fig. 7 and Fig. 8, the method for measuring the axis includes:

Step A1, set the reference unit 110 at the center of the generator set reference part 200, set the measurement unit 120 at the center of the generator set to be measured part 300, and make the digital telescope 113 of the reference unit 110 and the scale line of the measurement unit 120 relative settings;

Step A2, using the first laser rangefinder 112 to measure the distance from the reference base 111 to the inner ring surface of the reference component 200, adjust the position of the reference base 111 so that the axis of the reference base 111 coincides with the axis of the reference component 200, so as to determine the distance between the reference base 111 and the axis of the reference component 200 axis;

Step A3, using the second laser range finder 122 to measure the distance from the measuring base 121 to the inner annulus of the part to be measured 300, adjust the position of the measuring base 121 so that the axis of the measuring base 121 coincides with the axis of the part to be measured 300, to determine the distance to be measured the axis of the part 300;

Step A4, observe the scale line through the digital telescope 113, the difference between the collimation axis of the digital telescope 113 and zero degree (that is, the difference between the axis of the reference base 111 and the axis of the measurement base 121) is the reference component 200 and the component to be measured 300 degree of concentricity deviation.

The axis measuring device proposed by the utility model uses the first laser range finder 112 and the second laser range finder 122 to quickly determine the axis of the reference component 200 and the axis position of the component to be measured 300, and then realize rapid measurement of two components (reference The concentricity deviation of the part 200 and the part to be measured 300) adopts a high-precision laser range finder to improve the measurement accuracy, and uses the electronic reading of the laser range finder to replace the manual reading, reducing human errors, shortening the time-consuming measurement, and at the same time reducing the number of people Complete the measurement, reduce labor costs, and improve measurement efficiency.

In the work of adjusting the rotation axis of the generator set, the axis measuring device and the axis measuring method proposed by the utility model are used to measure the concentricity deviation data of the two components (the reference component 200 and the component to be measured 300), and then the generator set is rotated according to the above data. The adjustment of the axis can improve the adjustment efficiency of the rotation axis of the generator set.

In the present utility model, the first laser range finder 112, the second laser range finder 122 and the digital telescope 113 (also called digital telescope) can all adopt the prior art.

In the utility model, the scale line can be a cross-shaped scale line, and the zero point of the scale line is located at the center of the cross; The symmetrical arrangement has positive scales and negative scales, and the positive scales and negative scales are respectively arranged in sequence.

In an optional example of the present utility model, the reference base 111 has a first installation shaft 1111 protruding along its axis, and the first laser range finder 112 is installed on the first installation shaft 1111 and can rotate around the first installation shaft 1111 The axis rotation of the digital telescope 113 is installed on the end of the first installation shaft 1111; the end surface of the other end of the measurement base 121 facing away from the scale line is provided with a second installation shaft protruding along the axis of the measurement base 121, and the second laser The rangefinder 122 is installed on the second installation shaft 1211 and can rotate around the second installation shaft 1211 .

In an optional example of the present invention, step A2 includes: the first laser rangefinder 112 emits a ranging laser to the inner annulus of the reference component 200 and the ranging laser is perpendicular to the inner annulus of the reference component 200, and measures The distance from the reference base 111 to the inner ring surface of the reference component 200, the first laser range finder 112 rotates around the first installation axis 1111, adjusts the position of the reference base 111, and makes the first laser range finder 112 rotate to different positions for measurement The result (the distance from the reference base 111 to the inner ring surface of the reference component 200) is the same, the axis of the reference base 111 coincides with the axis of the reference component 200, and then the axis of the reference component 200 is determined;

Step A3 includes: the second laser rangefinder 122 emits a ranging laser to the inner annulus of the component to be measured 300 and the ranging laser is perpendicular to the inner annulus of the component to be measured 300, and measures the measurement base 121 into the component to be measured 300 The distance of the torus, the second laser range finder 122 rotates around the second installation shaft 1211, adjusts the position of the measurement base 121, and makes the second laser range finder 122 rotate to the measurement results at different positions (the measurement base 121 to the to-be-measured The distance of the inner ring surface of the component 300) is the same, the axis of the measuring base 121 coincides with the axis of the component 300 to be measured, and then the axis of the component 300 to be measured is determined.

In an optional example of the present invention, the reference base 111 and the measurement base 121 are disc-shaped, the measurement base 121 is arranged above the reference base 111 at intervals, and the first installation shaft 1111 is arranged on the upper surface of the reference base 111, The second installation shaft 1211 is set on the upper surface of the measurement base 121 , and the scale line is set on the lower surface of the measurement base 121 .

In an optional example of the present invention, a level sensor 130 is provided on both the reference base 111 and the measurement base 121 .

In an optional example of the present invention, the level sensor 130 is an electronic level. The electronic level can keep the reference base 111 and the measurement base 121 set horizontally.

In an optional example of the present invention, the generator set is a vertical hydroelectric generator set, and step A1 also includes adjusting the positions of the reference base 111 and the measurement base 121 through the level sensor 130 so that the axis of the reference base 111 and the measurement base 121 The axis lines coincide with the hammer line. Thereby guarantee that the ranging laser emitted by the first laser rangefinder 112 to the inner annulus of the reference part 200 is perpendicular to the inner annulus of the reference part 200; The ranging laser is perpendicular to the inner annulus of the component to be measured 300; the plane formed by the rotating laser ranging emitted by the first laser ranging instrument 112 is parallel to the reference base 111, and the ranging laser emitted by the second laser ranging instrument 122 rotates The formed plane is parallel to the measurement base 121 .

In an optional example of the present invention, an adjustment mechanism 140 is provided on the reference base 111 and the measurement base 121. The adjustment mechanism 140 can quickly adjust the horizontal positions of the reference base 111 and the measurement base 121. Each adjustment mechanism 140 each includes a base 141 and four adjustment bolts 142, the base 141 is cylindrical and sleeved outside the reference base 111 or the measurement base 121, each adjustment bolt 142 runs through the side wall of the base 141 and abuts against the On the reference base 111 or the measuring base 121 , each adjusting bolt 142 is screwed with the base 141 , and four adjusting bolts 142 are evenly distributed along the circumference of the base 141 . When it is necessary to fine-tune the positions of the reference base 111 and the measurement base 121, you only need to turn the adjustment bolt 142 on the adjustment mechanism 140 corresponding to it, and change the length of the adjustment bolt 142 extending into the base 141 to change the reference base. 111. Measuring the position of the base 121 is convenient and quick.

In an optional example of the present invention, the lower surface of the measuring base 121 is provided with an indium steel ruler 123 , and the scale line is set on the indium steel ruler 123 . Specifically, the indium steel ruler 123 should be kept relatively horizontal to the measurement base 121 , the scale line is set on the lower surface of the indium steel scale 123 and the zero point of the scale line is set on the axis of the measurement base 121 .

In an optional example of the present invention, the reference unit 110 is set on the reference support; the measurement unit 120 is set on the measurement support (not shown in the figure).

In an optional example, both the reference support and the measurement support are tripods, the top of the tripod is provided with a support platform, the upper surface of the support platform is a horizontal plane, and the cylindrical base 141 is vertically arranged on the upper surface of the support platform .

The working principle of the axis measuring device proposed by the utility model is as follows:

For example, the upper frame of the generator set is a component with coaxiality installation requirements (that is, the component to be measured 300), and the central axis of the lower labyrinth ring of the hydraulic turbine is generally used as the axis of the unit (that is, the lower labyrinth ring of the hydraulic turbine is the reference component 200), When installing the unit, the axes of each component of the unit are required to be on the same axis (that is, the axis of the upper frame and the axis of the lower labyrinth ring of the turbine are on the same axis), that is, there is a certain coaxiality requirement. At this moment, the axis measuring device and the axis measuring method proposed by the utility model can be used to measure the axis of the labyrinth (reference part 200) and the axis of the upper frame (the part to be measured 300) of the hydraulic turbine, and adjust the axis of the upper frame. Position, so that the axis of the upper frame and the axis of the labyrinth ring meet the coaxiality requirements.

At first, reference unit 110 is arranged at the center of the labyrinth ring (reference part 200) under the water turbine, measurement unit 120 is arranged at the center of the upper frame (parts to be measured 300), and the digital telescope 113 of reference unit 110 and The scale marks of the measuring unit 120 are set relatively;

Afterwards, the first laser rangefinder 112 emits a range-finding laser at the center of the lower labyrinth ring (reference part 200) of the water turbine to the inner annulus of the lower hydraulic turbine labyrinth ring (reference part 200), and the first laser rangefinder 112 can measure Get the distance from the reference base 111 to the inner ring surface of the reference part 200 (the distance from the center of the circle to the circumference), and adjust the position of the reference base 111 by rotating the ranging laser to make the above-mentioned distance reach the center of the reference base 111 and the lower labyrinth ring of the water turbine (the reference The center of the part 200) is consistent to obtain the center position, and then determine the axis of the labyrinth ring (reference part 200) under the water turbine;

Then, the second laser rangefinder 122 emits a distance measuring laser at the center of the upper frame (part to be measured 300), and measures the axis (center) position of the upper frame (part to be measured 300), the specific occurrence and steps and reference The units 110 are basically the same, and will not be described in detail here; at this time, the first laser range finder 112 and the second laser range finder 122 both reach the center of their respective corresponding components;

Then, use the digital telescope 113 (electronic detector) to observe upwards at the center position of the labyrinth ring (reference part 200) under the water turbine, and read the indium steel on the lower surface of the measurement base 121 at the center of the upper frame (part 300 to be measured) The reading of the ruler gets the deviation of the two centers (that is, the deviation of the coaxiality);

Finally, keep the labyrinth ring (reference part 200) under the water turbine still, adjust the installation position in the horizontal direction of the upper frame (the part to be measured 300), and then use the measuring unit 120 to determine the axis position of the upper frame (the part to be measured 300) , and read the coaxiality deviation through the digital telescope 113, repeat this step until the coaxiality deviation value is reduced to the specified range (meeting the coaxiality requirement), so that the center of the upper frame (the part to be measured 300) and the lower part of the water turbine The centers of the labyrinth rings (reference member 200) are on the same axis.

For the detailed explanations of the above-mentioned embodiments, the purpose is only to explain the utility model so as to better understand the utility model, but these descriptions cannot be interpreted as a limitation of the utility model for any reason, especially, The various features described in different implementations can also be combined arbitrarily with each other to form other implementations. Unless there is an explicit description to the contrary, these features should be understood as being applicable to any implementation, and not limited to all of them. described implementation.

Claims (8)

1. An axis measuring device, characterized in that, said axis measuring device comprises axially spaced: The reference unit has a reference base, a first laser range finder and a digital telescope, the first laser range finder and the digital telescope are installed on the reference base, and the first laser range finder can circle the The axis of the reference base rotates, and the laser emitted by the first laser rangefinder is perpendicular to the axis of the reference base, and the line-of-sight axis of the digital telescope coincides with the axis of the reference base; The measuring unit has a measuring base and a second laser rangefinder, the second laser rangefinder is installed on the measuring base and can rotate around the axis of the measuring base, and the laser rangefinder emitted by the second laser rangefinder The laser is perpendicular to the axis of the measurement base, and the end surface of the measurement base facing the reference unit is provided with a scale line, and the zero point of the scale line coincides with the axis of the measurement base. 2. The axis measuring device according to claim 1, wherein the reference base has a first mounting shaft protruding along its axis, and the first laser rangefinder is mounted on the first mounting shaft And can rotate around the first installation shaft, the digital telescope is installed at the end of the first installation shaft, the end face of the other end of the measurement base facing away from the scale line is provided with a A second installation shaft protruding from the axis of the second laser range finder is mounted on the second installation shaft and can rotate around the second installation shaft. 3. The axis measuring device according to claim 2, wherein the reference base and the measurement base are disc-shaped, and the measurement bases are arranged at intervals above the reference base, and the first The installation axis is arranged on the upper surface of the reference base, the second installation axis is arranged on the upper surface of the measurement base, and the scale line is arranged on the lower surface of the measurement base. 4. The axis measuring device according to claim 3, characterized in that, a horizontally arranged indium steel ruler is installed on the lower surface of the measurement base, and the scale line is arranged on the indium steel ruler. 5. The axis measuring device according to claim 1, characterized in that, level sensors are arranged on both the reference base and the measurement base. 6. The axis measuring device according to claim 5, wherein the level sensor is an electronic level. 7. The axis measuring device according to claim 1, wherein adjustment mechanisms are provided on the reference base and the measurement base, and each adjustment mechanism includes a base and four adjustment bolts, The base is cylindrical and sleeved outside the reference base or the measurement base, and each of the adjustment bolts passes through the side wall of the base and abuts against the reference base or the measurement base. On the measuring base, each of the adjusting bolts is threadedly engaged with the base, and four adjusting bolts are evenly distributed along the circumference of the base. 8. The axis measuring device according to claim 1, wherein the measuring device further comprises a reference bracket and a measurement bracket, the reference unit is arranged on the reference bracket; the measurement unit is arranged on the measurement on the stand.