A kind of scroll compressor static disk height difference measuring frock

Abstract

The utility model discloses a kind of height difference measuring tool of scroll compressor moving and static disc, including base and compression mechanism, base is used to place the moving and static disc after closing, compression mechanism is used to press down moving disc, and compression mechanism includes compression block and sensor fixing seat, central hole is opened on sensor fixing seat, the axis of central hole coincides with static disc center line, displacement sensor set downward is installed in the position of sensor fixing seat located at the periphery of central hole, guiding shaft is slidably assembled in central hole, the bottom of guiding shaft is fixed with conical guide block, the outer circumferential surface of lower part of conical guide block is tapered surface that gradually increases upwards, the bottom of conical guide block is used to insert into moving disc back bearing hole, compression spring is connected between sensor fixing seat and conical guide block, and compression spring is sleeved on guiding shaft, compression block is fixed on the bottom surface of sensor fixing seat and is used to compress the peripheral position of moving disc back bearing hole. The utility model automatically guides the position of moving disc before moving and static disc height difference measurement.

Description

Technical Field

[0001] This utility model relates to a tooling for measuring the height difference between the moving and stationary plates of a scroll compressor, belonging to the technical field of compressor testing equipment. Background Technology

[0002] A scroll compressor uses a unique scroll-type rotating disc to achieve gas compression. The stationary disc is fixed to the compressor housing, while the rotating disc rotates around the center of the stationary disc via an eccentric shaft. To ensure that the compressed gas does not leak out during the compression process, the height difference between the rotating and stationary discs needs to be within a certain range. If the height difference is too large, the high-pressure gas will leak into the low-pressure chamber, affecting the cooling capacity; if the height difference is too small, it will affect the rotation of the rotating disc. To meet the compressor's axial sealing requirements and ensure its COP (Coefficient of Performance), the height difference between the rotating and stationary discs needs to be measured.

[0003] Current technology for measuring the height difference between the moving and stationary discs involves assembling the discs and then measuring the height difference. After assembly, the moving and stationary discs... Figure 6 As shown, it is difficult to ensure that the centers of the moving plate and the stationary plate are in the same position. If the centers of the moving plate and the stationary plate are not aligned, the measuring instrument will not be able to accurately position the bottom of the BP ring groove of the moving plate. Therefore, it is necessary to manually adjust or place other auxiliary fixtures to ensure that the centers of the moving plate and the stationary plate are relatively consistent before measuring the height difference between the moving plate and the stationary plate, which affects the measurement efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a tooling for measuring the height difference between the moving and stationary discs of a scroll compressor, so as to solve the technical problem that manual adjustment is required to align the centers of the moving and stationary discs before measuring the height difference.

[0005] This utility model adopts the following technical solution: a tooling for measuring the height difference between the moving and stationary discs of a scroll compressor, comprising a base and a clamping mechanism. The base is used to place the aligned moving and stationary discs, and the clamping mechanism is used to press the moving disc downwards. The clamping mechanism includes a clamping block and a sensor mounting base. The sensor mounting base has a central hole, the axis of which coincides with the center line of the stationary disc. A downwardly positioned displacement sensor is installed on the sensor mounting base at a position around the central hole. A guide shaft is slidably fitted inside the central hole, and a tapered guide block is fixed at the bottom of the guide shaft. The outer circumferential surface of the lower part of the tapered guide block is a tapered surface that gradually increases upwards. The bottom of the tapered guide block is used to insert into the bearing hole on the back of the moving disc. A compression spring sleeved on the guide shaft is connected between the sensor mounting base and the tapered guide block. The clamping block is fixed on the bottom surface of the sensor mounting base and is used to press the outer part of the bearing hole on the back of the moving disc.

[0006] An oil-free bushing is fixedly installed inside the central hole, and the guide shaft is slidably installed inside the oil-free bushing.

[0007] The upper end of the compression spring is fixedly connected to the lower end of the oil-free bushing.

[0008] The bottom surface of the tapered guide block is a plane with a diameter smaller than the inner diameter of the bearing hole on the back of the moving disk. The maximum diameter of the tapered surface of the tapered guide block is greater than the diameter of the bearing hole on the back of the moving disk, and the height of the tapered surface of the tapered guide block is greater than the depth of the bearing hole on the back of the moving disk.

[0009] The upper part of the conical guide block is a cylindrical section, and the diameter of the cylindrical section is equal to the maximum diameter of the conical surface.

[0010] The upper end face of the cylindrical section is provided with a fixing block that is connected to the guide shaft.

[0011] The number of displacement sensors is two or more, and each displacement sensor is evenly distributed on the outer periphery of the central hole.

[0012] The base is fixed to the workbench, and the base is provided with a stationary plate positioning hole.

[0013] The guide shaft is fixed with a guide shaft support at a position above the sensor mounting base, and a baffle is provided on the sensor mounting base above the guide shaft support.

[0014] The beneficial effects of this utility model are as follows: A guide shaft is installed on the sensor mounting base. The tapered guide block at the bottom of the guide shaft constitutes a center-aligning mechanism for the displacement of the moving disk. The guide shaft and the compression spring constitute a telescopic mechanism for guiding the tapered guide block. The bottom surface of the tapered guide block is lower than the bottom surface of the clamping block. When the sensor mounting base moves downward, the tapered guide block first contacts the moving disk. As the tapered guide block enters the bearing hole on the back of the moving disk, the bearing hole of the moving disk moves along the direction of the guide post until the center of the moving disk aligns with the center of the stationary disk. During this process, the compression spring is compressed, and relative sliding occurs between the guide shaft and the sensor mounting base. The guide shaft guides the downward movement of the tapered guide block, preventing any deviation in its movement direction. After the centers of the moving and stationary disks are aligned, the clamping block presses against the annular measuring reference surface of the moving disk, and the displacement sensor measures the height difference between the moving and stationary disks. After the height difference measurement is completed, the sensor mounting base and displacement sensor return to their initial positions, and the conical guide block resets under the force of the compression spring, ready for the next measurement. This invention automatically aligns the position of the moving plate before measuring the height difference between the moving and stationary plates of a scroll compressor, ensuring that the centers of the moving and stationary plates are aligned, eliminating the need for manual alignment and thus automating the measurement of the height difference. Compared with existing technologies, this invention offers convenient and efficient measurement.

[0015] Preferably, an oil-free bushing is provided between the guide shaft and the sensor mounting base to reduce the friction of the guide shaft and reduce its wear.

[0016] Preferably, multiple displacement sensors evenly distributed around the outer periphery of the central hole are used to detect multiple points on the assembled moving and stationary discs, resulting in more accurate detection results.

[0017] Preferably, the guide shaft support and the baffle stop fit together to limit the compression length of the compression spring and keep the guide shaft in the same position after each reset. Attached Figure Description

[0018] Figure 1 This is a three-dimensional sectional view of a scroll compressor moving and stationary plate height difference measuring fixture according to an embodiment of this utility model;

[0019] Figure 2 yes Figure 1 A plan view;

[0020] Figure 3 yes Figure 1 Schematic diagram of the fixture for measuring the height difference between the moving and stationary plates of a scroll compressor;

[0021] Figure 4 yes Figure 3 A sectional view;

[0022] Figure 5 yes Figure 1 A magnified view of a portion of the image;

[0023] Figure 6 This is a schematic diagram showing that the centers of the moving and stationary disks are not aligned after assembly in the existing technology.

[0024] In the diagram: 1-fixed block, 2-sensor mounting base, 3-clamping block, 4-guide shaft, 5-conical guide block, 6-compression spring, 7-oil-free bushing, 8-guide shaft support, 9-displacement sensor, 10-worktable, 11-base, 12-moving disc, 13-stationary disc. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 6As shown, a scroll compressor moving and stationary disc height difference measuring fixture of one embodiment of the present invention includes a base 11 and a clamping mechanism. The base 11 is used to place the moving and stationary discs after they are aligned. The base 11 is fixed on the worktable 10 and the base 11 is provided with a stationary disc positioning hole. The clamping mechanism is used to press the moving disk 12 downward. The clamping mechanism includes a clamping block 3 and a sensor mounting base 2. The sensor mounting base 2 has a central hole, the axis of which coincides with the center line of the stationary disk 13. A downwardly positioned displacement sensor 9 is installed on the sensor mounting base 2 at the periphery of the central hole. A guide shaft 4 is slidably fitted inside the central hole. A tapered guide block 5 is fixed to the bottom of the guide shaft 4. The outer circumferential surface of the lower part of the tapered guide block 5 is a tapered surface that gradually increases upward. The bottom of the tapered guide block 5 is used to insert into the bearing hole on the back of the moving disk 12. A compression spring 6 sleeved on the guide shaft 4 is connected between the sensor mounting base 2 and the tapered guide block 5. The clamping block 3 is fixed on the bottom surface of the sensor mounting base 2 and is used to press the periphery of the bearing hole on the back of the moving disk.

[0027] An oil-free bushing 7 is fixedly installed inside the central hole, and the guide shaft 4 is slidably installed inside the oil-free bushing 7. The upper end of the compression spring 6 is fixedly connected to the lower end of the oil-free bushing 7. A guide shaft support 8 is installed on the upper surface of the sensor mounting base 2, and the guide shaft support 8 has a guide hole that coincides with the axis of the central hole. The guide shaft 4 is fixed to the guide shaft support 8 at a position above the sensor mounting base 2, and a baffle is provided on the sensor mounting base 2 above the guide shaft support 2.

[0028] The bottom surface of the tapered guide block 5 is a plane with a diameter smaller than the inner diameter of the bearing hole on the back of the moving disk 12. The maximum diameter of the tapered surface of the tapered guide block 5 is greater than the diameter of the bearing hole on the back of the moving disk 12, and the height of the tapered surface of the tapered guide block 5 is greater than the depth of the bearing hole on the back of the moving disk. The upper part of the tapered guide block 5 is a cylindrical section, and the diameter of the cylindrical section is equal to the maximum diameter of the tapered surface. A fixing block 1 connected to the guide shaft 4 is provided on the upper end face of the cylindrical section.

[0029] The number of displacement sensors 9 is two or more, and each displacement sensor 9 is evenly distributed on the outer periphery of the central hole. In this embodiment, there are four displacement sensors 9 in total.

[0030] In this embodiment, the scroll compressor moving-stationary disc height difference measuring fixture is used by a drive mechanism (not shown in the attached drawings) on the worktable, which drives the sensor mounting base 1 and the clamping block 3 to move up and down simultaneously. Before measurement, the stationary disc 13 is installed on the base 11 and positioned through the stationary disc positioning hole. Then, the moving disc 12 is assembled with the stationary disc 13. Initially, the compression spring 6 is not under force, and the bottom surface of the tapered guide block 5 is lower than the bottom surface of the clamping block 3. When the sensor mounting base 2 moves downward, the guide shaft 4 and the tapered guide block 5 move downward synchronously until the tapered guide block 5 contacts the moving disc 12. At this time, as the sensor mounting base 9 continues to move downward, the compression spring 6 is compressed, and the guide shaft 4 and the sensor mounting base 2 undergo relative displacement. The tapered guide block 5 enters the bearing hole at the center of the back of the moving disc 12. When the moving disc is not aligned with the center of the stationary disc, the tapered guide block will push the moving disc to shift when it enters the bearing hole until the moving disc is aligned with the center of the stationary disc. The sensor mounting base 2 continues to move the clamping block 3 downwards, until the clamping block 3 finally presses against the annular measuring reference surface of the moving plate 12, ensuring that the clamping block 3 can correctly contact the reference surface of the object being measured. Finally, the displacement sensor 9 is used to measure the height difference between the moving and stationary plates. The measurement of the height difference between the moving and stationary plates uses the bottom surface of the annular groove of the moving plate as the measuring reference, measuring the height difference from the reference surface to the end face of the stationary plate. In other words, it measures the height difference between the end face of the clamping block and the surface of the object being measured that is in contact with the displacement sensor. After the measurement, the sensor mounting base 2 and the displacement sensor 9 return to their origin, and simultaneously, the guide shaft 4 and the tapered guide block 5 reset under the force of the compression spring, ready for the next measurement. The compression length of the compression spring 6 is limited by the guide shaft support 8 and the baffle stop, ensuring that the guide shaft remains in the same position after each reset.

[0031] This invention automatically aligns the position of the moving plate before measuring the height difference between the moving and stationary plates of a scroll compressor, ensuring that the centers of the moving and stationary plates are aligned without the need for manual alignment, thus automating the measurement of the height difference between the moving and stationary plates.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fixture for measuring the height difference between the moving and stationary discs of a scroll compressor, comprising a base and a clamping mechanism, wherein the base is used to place the aligned moving and stationary discs, and the clamping mechanism is used to press the moving disc downwards, characterized in that: The clamping mechanism includes a clamping block and a sensor mounting base. The sensor mounting base has a central hole, the axis of which coincides with the center line of the stationary disk. A downwardly positioned displacement sensor is installed on the sensor mounting base at the periphery of the central hole. A guide shaft is slidably fitted inside the central hole. A tapered guide block is fixed to the bottom of the guide shaft. The outer circumferential surface of the lower part of the tapered guide block is a tapered surface that gradually increases in size upwards. The bottom of the tapered guide block is used to insert into the bearing hole on the back of the moving disk. A compression spring sleeved on the guide shaft connects the sensor mounting base and the tapered guide block. The clamping block is fixed to the bottom surface of the sensor mounting base and is used to clamp the periphery of the bearing hole on the back of the moving disk.

2. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 1, characterized in that: An oil-free bushing is fixedly installed inside the central hole, and the guide shaft is slidably installed inside the oil-free bushing.

3. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 2, characterized in that: The upper end of the compression spring is fixedly connected to the lower end of the oil-free bushing.

4. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 1, characterized in that: The bottom surface of the tapered guide block is a plane with a diameter smaller than the inner diameter of the bearing hole on the back of the moving disk. The maximum diameter of the tapered surface of the tapered guide block is greater than the diameter of the bearing hole on the back of the moving disk, and the height of the tapered surface of the tapered guide block is greater than the depth of the bearing hole on the back of the moving disk.

5. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 4, characterized in that: The upper part of the conical guide block is a cylindrical section, and the diameter of the cylindrical section is equal to the maximum diameter of the conical surface.

6. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 5, characterized in that: The upper end face of the cylindrical section is provided with a fixing block that is connected to the guide shaft.

7. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 1, characterized in that: The number of displacement sensors is two or more, and each displacement sensor is evenly distributed on the outer periphery of the central hole.

8. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 1, characterized in that: The base is fixed to the workbench, and the base is provided with a stationary plate positioning hole.

9. The tooling for measuring the height difference between the moving and stationary discs of a scroll compressor according to claim 1, characterized in that: The guide shaft is fixed with a guide shaft support at a position above the sensor mounting base, and a baffle is provided on the sensor mounting base above the guide shaft support.

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