Head clearance measuring equipment for variable displacement compressor

Abstract

The utility model discloses a variable displacement compressor top clearance measuring device which comprises a device frame, a pressing assembly, a positioning tool, a detection tool and a jacking assembly are arranged in the device frame, the pressing assembly is located over the positioning tool, the pressing assembly is provided with an automatic lifting pressing plate, the pressing assembly further comprises a lifting air cylinder, and the lifting air cylinder is connected with the detection tool. The telescopic end of the lifting air cylinder is fixedly connected with a rotating motor, the rotating motor is connected with a rotating head through a speed reducer, the rotating head movably penetrates through the pressing plate and then is fixedly connected with a compressor main shaft in an inserted mode in the radial direction, the jacking assembly comprises a jacking air cylinder, the telescopic end of the jacking air cylinder is connected with a detection tool, and a displacement sensor is installed on the side face of the detection tool. The lower end of a piston rod of the top piston cylinder is connected with a displacement sensor contact plate. The device is high in automation degree in the whole process, and improves the measurement efficiency and precision.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive air conditioning compressor assembly equipment, specifically a variable displacement compressor head clearance measuring device. Background Technology

[0002] The top clearance of a compressor is an important parameter that affects its performance. To obtain the maximum discharge volume, the minimum clearance between the piston end face and the valve plate should be as small as possible. However, during the manufacturing process, there will be machining errors and assembly errors, making it difficult to control the clearance between the piston end face and the valve plate accurately.

[0003] A large clearance will reduce the exhaust volume; if the minimum clearance becomes negative, the piston will jam against the valve plate, preventing it from rotating.

[0004] To prevent the piston from jamming against the valve plate while maximizing exhaust volume, a shim is added between the cylinder block and the valve plate to adjust the clearance between them. The thickness of this shim is determined based on the measured clearance value. Traditional manual measurement suffers from poor accuracy, low production efficiency, and the tendency to miss values, making it unsuitable for current production needs.

[0005] Therefore, we propose a variable displacement compressor head clearance measuring device to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a device for measuring the head clearance of a variable displacement compressor, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a variable displacement compressor head clearance measuring device, comprising: a device frame, wherein a clamping component, a positioning fixture, a detection fixture and a lifting component are arranged within the device frame, wherein the clamping component is located directly above the positioning fixture;

[0008] The clamping assembly is equipped with an automatically lifting pressure plate;

[0009] The clamping assembly also includes a lifting cylinder, the telescopic end of which is fixedly connected to a rotary motor, the rotary motor is connected to a rotating head through a reducer, and the rotating head is radially fixedly inserted into the compressor main shaft after moving through the pressure plate.

[0010] The lifting assembly includes a lifting cylinder, the telescopic end of which is connected to a detection fixture, and a displacement sensor is installed on the side of the detection fixture.

[0011] The testing fixture includes a top piston cylinder, the telescopic end of which is connected to a measuring contact, and the lower end of the piston rod of the top piston cylinder is connected to a displacement sensor contact plate.

[0012] Preferably, a control box is provided on the rear side of the equipment frame, a human-machine interface is provided on the upper end of the equipment frame, and a three-color light is installed on the top of the equipment frame.

[0013] Preferably, the control box is equipped with a main unit, electrical and pneumatic control switches, and an associated PLC module. The PLC module is connected to a human-machine interface, and the human-machine interface controls the three-color lights.

[0014] Preferably, a torque sensor is provided between the reducer and the rotating head.

[0015] Preferably, the clamping assembly includes a clamping cylinder, and the telescopic end of the clamping cylinder is fixedly connected to a pressure plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The compressor without the rear cover and valve plate is manually placed into the positioning fixture. The equipment is started, and the clamping cylinder drives the pressure plate to press the compressor onto the positioning fixture. At the same time, the lifting cylinder pushes the rotating head downward and connects it to the compressor's main shaft. The lifting cylinder of the lifting assembly lifts the detection fixture and displacement sensor upward, so that the detection fixture is pressed against the compressor piston end face. The displacement sensor measures the piston displacement through the detection fixture and calculates the relative size between the piston end face and the valve plate. The measurement results are displayed through the human-machine interface. The entire process is highly automated, improving the efficiency and accuracy of the measurement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is the left view of the present invention;

[0020] Figure 3 This is a schematic diagram of the clamping assembly in this utility model;

[0021] Figure 4 This is a schematic diagram of the lifting assembly in this utility model;

[0022] Figure 5 This is a schematic diagram of the testing fixture in this utility model;

[0023] Figure 6 This is a top view of the testing fixture in this utility model.

[0024] In the diagram: 1. Equipment frame; 2. Human-machine interface; 3. Clamping assembly; 31. Clamping cylinder; 32. Lifting cylinder; 33. Rotary motor; 34. Reducer; 35. Torque sensor; 5. Rotating head; 6. Pressure plate; 7. Positioning fixture; 8. Detection fixture; 81. Measuring contact; 82. Top piston cylinder; 83. Displacement sensor contact plate; 9. Displacement sensor; 10. Lifting assembly; 11. Control box; 12. Three-color light. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 This utility model provides a technical solution: a variable displacement compressor head clearance measuring device, comprising: a device frame 1, a control box 11 on the rear side of the device frame 1, a human-machine interface 2 on the upper end of the device frame 1, a three-color light 12 installed on the top of the device frame 1, a main unit, electrical and pneumatic control switches and an associated PLC module in the control box 11, the PLC module being connected to the human-machine interface 2, the human-machine interface 2 controlling the three-color light 12, the human-machine interface 2 being an online operation platform used to control each electrical and pneumatic circuit through the control box 11 and read data from each sensor in real time, thereby realizing digital intelligent measurement of the compressor head clearance.

[0027] The equipment frame 1 is equipped with a clamping assembly 3, a positioning fixture 7, a testing fixture 8 and a lifting assembly 10. The clamping assembly 3 is located directly above the positioning fixture 7. The clamping assembly 3 includes a clamping cylinder 31. The telescopic end of the clamping cylinder 31 is fixedly connected to the pressure plate 6. The clamping cylinder 31 drives the pressure plate 6 to press the compressor downward or release the compressor upward.

[0028] The clamping assembly 3 also includes a lifting cylinder 32. The telescopic end of the lifting cylinder 32 is fixedly connected to a rotary motor 33. The rotary motor 33 is connected to a rotating head 5 through a reducer 34. The rotating head 5 moves through the pressure plate 6 and is radially fixedly inserted into the compressor main shaft. A torque sensor 35 is set between the reducer 34 and the rotating head 5. When moving downward, the rotating head 5 is fitted into the compressor main shaft and radially fixed thereto. The rotary motor 33 can drive the compressor main shaft to rotate through the rotating head 5.

[0029] The lifting assembly 10 includes a lifting cylinder. The telescopic end of the lifting cylinder is connected to the detection fixture 8. A displacement sensor 9 is installed on the side of the detection fixture 8. The lifting cylinder drives the displacement sensor 9 and the detection fixture 8 to lift upward. The detection fixture 8 contacts and positions itself with the positioning fixture 7. The displacement sensor 9 detects the maximum displacement of the piston end face through the detection fixture 8. The top clearance value is calculated by comparing this measured value with the reference value.

[0030] The testing fixture 8 includes a top piston cylinder 82. The telescopic end of the top piston cylinder 82 is connected to a measuring contact 81. The lower end of the piston rod of the top piston cylinder 82 is connected to a displacement sensor contact plate 83. The top piston cylinder 82 pushes the measuring contact 81 upward, so that the measuring contact 81 presses against the end face of the compressor piston. When the compressor main shaft rotates, the piston will move up and down. When the piston moves downward, the top piston cylinder 82 will contract due to the downward pressure of the piston. When the top piston cylinder 82 contracts to a certain stroke, the displacement sensor contact plate 83 contacts the displacement sensor 9 and reads the maximum downward value. This value is compared with the reference value to calculate the top clearance value.

[0031] Working principle: The compressor without the rear cover and valve plate is manually placed into the positioning fixture 7. The equipment is started, and the clamping cylinder 31 drives the pressure plate 6 to press the compressor onto the positioning fixture 7. At the same time, the lifting cylinder 32 pushes the rotating head 5 downward, and the rotating head 5 is inserted into the compressor's main shaft.

[0032] The lifting cylinder of the lifting assembly 10 lifts the detection fixture 8 and the displacement sensor 9 upwards, so that the detection fixture 8 is pressed against the piston end face of the compressor. The displacement sensor 9 measures the displacement of the piston through the detection fixture 8 and calculates the relative size between the piston end face and the valve plate. The measurement result is displayed through the human-machine interface 2.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the head clearance of a variable displacement compressor, comprising: The equipment frame (1) is characterized in that: a clamping component (3), a positioning fixture (7), a detection fixture (8) and a lifting component (10) are provided inside the equipment frame (1), wherein the clamping component (3) is located directly above the positioning fixture (7); The clamping assembly (3) is equipped with an automatically lifting pressure plate (6). The pressing assembly (3) also includes a lifting cylinder (32), the telescopic end of the lifting cylinder (32) is fixedly connected to a rotary motor (33), the rotary motor (33) is connected to a rotating head (5) through a reducer (34), and the rotating head (5) is radially fixedly inserted into the compressor main shaft after passing through the pressure plate (6). The lifting assembly (10) includes a lifting cylinder, the telescopic end of which is connected to a detection fixture (8), and a displacement sensor (9) is installed on the side of the detection fixture (8). The detection fixture (8) includes a top piston cylinder (82), the telescopic end of the top piston cylinder (82) is connected to a measuring contact (81), and the lower end of the piston rod of the top piston cylinder (82) is connected to a displacement sensor contact plate (83).

2. The variable displacement compressor head clearance measuring device according to claim 1, characterized in that, The equipment frame (1) is provided with a control box (11) on the rear side, a human-machine interface (2) is provided on the upper end of the equipment frame (1), and a three-color light (12) is installed on the top of the equipment frame (1).

3. The variable displacement compressor head clearance measuring device according to claim 2, characterized in that, The control box (11) is equipped with a host, electrical and pneumatic control switches and associated PLC module. The PLC module is connected to the human-machine interface (2), and the human-machine interface (2) controls the three-color lamp (12).

4. The variable displacement compressor head clearance measuring device according to claim 1, characterized in that, A torque sensor (35) is provided between the reducer (34) and the rotating head (5).

5. The variable displacement compressor head clearance measuring device according to claim 1, characterized in that, The clamping assembly (3) includes a clamping cylinder (31), and the telescopic end of the clamping cylinder (31) is fixedly connected to a pressure plate (6).

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