air pump decompression test stand

Abstract

The utility model belongs to air pump test technical field, concretely relates to an air pump pressure relief test board, including test board base, be provided with linear guide rail, end clamping mechanism and top pressure mechanism on test board base, be provided with sliding seat on linear guide rail, be provided with the air pump of measuring on sliding seat, test board base includes adjacent setting test station and removal station, test station and removal station all are along linear guide rail's extension direction setting, test station and removal station cooperate sliding seat and set up limit locking block between, end clamping mechanism includes the first clamping unit and the second clamping unit of opposite setting, first clamping unit and the second clamping unit are located test station's both sides respectively, top pressure mechanism includes support vertical board and pressure drive part, and pressure drive part is located test station's top. The device can reduce the vibration and microdisplacement of air pump in the testing process.

Description

Technical Field

[0001] This utility model belongs to the field of air pump testing technology, specifically relating to an air pump pressure relief test bench. Background Technology

[0002] The air pump, a secondary air pump used in automotive engines, is a key component for reducing pollutant emissions during cold starts. The pressure relief valve integrated within the air pump acts as a safety device, opening when the exhaust system is blocked to release excessive pressure and protect the air pump itself from damage. Therefore, the reliability of the pressure relief valve directly affects the safety of the air pump and the entire emission control system. During air pump production and maintenance, precise testing using a dedicated pressure relief test bench is essential. Even the slightest vibration during testing can cause fluctuations in pressure sensor readings, leading to inaccurate pressure capture points for the pressure relief valve. Furthermore, it can easily cause seal failure, mistakenly classifying qualified products as unqualified, posing significant challenges to production quality and after-sales maintenance.

[0003] Chinese patent CN209069579U discloses a comprehensive testing device for an air pressure regulating valve, including a test bench and a mounting frame. The mounting frame is set on the test bench, which is equipped with an intake pressure gauge, an intake switch, and a cylinder switch. An air pump is installed inside the test bench. The intake pressure gauge is connected to the air pump via a pipeline, and the intake switch is connected to the air pump via a circuit. An intake mechanism is fixed on one upright plate of the mounting frame, and the intake mechanism is connected to an intake pipe. The other end of the intake pipe is connected to the air pump inside the test bench. Another upright plate of the mounting frame is connected to a cylinder. A connecting rod inside the cylinder passes through the upright plate and is connected to an exhaust mechanism. The cylinder switch is connected to the cylinder via a circuit, and the exhaust mechanism is connected to an exhaust pipe. This patent can prevent pressure leakage during testing, and multiple tests such as sealing, stability, pressure regulation, and sensitivity can be performed with a single clamping operation. However, when testing the air pump, the motor inside the air pump generates continuous, multi-directional vibration and torque at high speed. This unstable state directly interferes with the testing process, causing fluctuations in the pressure sensor readings and seriously affecting the accuracy and repeatability of the test data. Utility Model Content

[0004] The purpose of this invention is to provide an air pump pressure relief test bench that can reduce the vibration and micro-displacement of the air pump during the test, thereby improving the accuracy and reliability of the test results.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An air pump depressurization test bench includes a test bench base, on which a linear guide rail, an end clamping mechanism, and a top pressing mechanism are provided. A sliding seat is slidably disposed on the linear guide rail, and an air pump to be tested is disposed on the sliding seat. The test bench base includes a test station and a transfer station arranged adjacent to each other, both of which are arranged along the extension direction of the linear guide rail. A limit locking block is provided between the test station and the transfer station in cooperation with the sliding seat. The end clamping mechanism includes a first clamping unit and a second clamping unit arranged opposite to each other, which are respectively located on both sides of the test station. The top pressing mechanism includes a supporting plate and a pressing drive component, which is located above the test station.

[0006] Furthermore, one end of the support plate is fixedly connected to the clamping drive component, and the other end of the support plate is fixedly connected to the test bench base.

[0007] Furthermore, the clamping drive includes an electric push rod that extends downward and is connected to a constraint pressure head, the vertical cross-section of which is an isosceles trapezoid.

[0008] Furthermore, a support frame is fixedly installed on the sliding seat in conjunction with the air pump under test, and the vertical cross-section of the support frame is set in an inverted isosceles trapezoid.

[0009] Furthermore, both the inner wall of the constraint head and the inner wall of the support frame are equipped with cushioning anti-slip pads.

[0010] Furthermore, the air pump under test is provided with an air supply port and a pressure relief port at both ends, the first clamping unit is provided with an air supply sealing joint in conjunction with the air supply port, and the second clamping unit is provided with a pressure testing sealing joint in conjunction with the pressure relief port.

[0011] Furthermore, the first clamping unit includes a first clamping seat and a first pneumatic drive cylinder. One end of the first pneumatic drive cylinder is fixedly connected to the first clamping seat, and the other end of the first pneumatic drive cylinder is fixedly connected to the air supply sealing joint.

[0012] Furthermore, the second clamping unit includes a second clamping seat and a second pneumatic drive cylinder. One end of the second pneumatic drive cylinder is fixedly connected to the second clamping seat, and the other end of the second pneumatic drive cylinder is fixedly connected to the pressure measuring and sealing joint.

[0013] Furthermore, the first clamping seat is integrally formed in an L-shaped structure, and a first through hole is provided on the first clamping seat in conjunction with the air supply sealing connector.

[0014] Furthermore, the second clamping seat is integrally formed in an L-shaped structure, and a second through hole is provided on the second clamping seat to cooperate with the pressure testing and sealing joint.

[0015] The beneficial effects of this utility model are as follows: This invention constructs a stable testing system by setting up a linear guide rail, an end clamping mechanism, and a top pressing mechanism. When the sliding seat carries the air pump under test to the testing station and is positioned by the limit locking block, the air pump is simultaneously subjected to horizontal clamping force from the end clamping mechanisms on both sides and vertical downward pressure from the top pressing mechanism. This three-point positioning three-dimensional constraint system forms a stable rigid support structure, which can effectively resist the multi-directional vibration and torque generated by the high-speed operation of the motor inside the air pump under test, fundamentally eliminating its shaking and micro-displacement. The transfer station and the testing station work together to achieve a seamless connection between rapid loading and precise positioning testing. Operators can easily load and unload the air pump under test at the transfer station, and then gently push the sliding seat to accurately send it into the testing station for automatic clamping and testing. This device can optimize the operation process and improve testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the test bench base, linear guide rail, sliding seat, support frame, air pump to be tested, and limit locking block in this utility model; Figure 4 This is a schematic diagram of the gas supply sealing joint in this utility model; Figure 5 This is a schematic diagram of the pressure-measuring sealing joint in this utility model; In the picture: 1. Test bench base; 101. Test station; 102. Transfer station; 2. Linear guide rail; 3. Sliding seat; 4. Air pump under test; 5. Limiting locking block; 6. First clamping unit; 601. First clamping seat; 602. First pneumatic drive cylinder; 7. Second clamping unit; 701. Second clamping seat; 702. Second pneumatic drive cylinder; 8. Support plate; 9. Pressing drive component; 901. Electric push rod; 902. Constraint pressure head; 10. Support bracket; 11. Air supply sealing joint; 12. Pressure testing sealing joint; 13. First through hole; 14. Second through hole. Detailed Implementation

[0017] The present invention will now be described and illustrated in detail with reference to the embodiments.

[0018] Example 1 like Figure 1-5As shown, the air pump depressurization test bench includes a test bench base 1, on which a linear guide rail 2, an end clamping mechanism, and a top pressing mechanism are provided. A sliding seat 3 is slidably arranged on the linear guide rail 2, and an air pump 4 to be tested is arranged on the sliding seat 3. The test bench base 1 includes a test station 101 and a transfer station 102 arranged adjacent to each other. Both the test station 101 and the transfer station 102 are arranged along the extension direction of the linear guide rail 2. A limit locking block 5 is provided between the test station 101 and the transfer station 102 in cooperation with the sliding seat 3. The end clamping mechanism includes a first clamping unit 6 and a second clamping unit 7 arranged opposite to each other. The first clamping unit 6 and the second clamping unit 7 are respectively located on both sides of the test station 101. The top pressing mechanism includes a supporting plate 8 and a pressing drive 9, which is located above the test station 101.

[0019] One end of the support plate 8 is fixedly connected to the clamping drive component 9, and the other end of the support plate 8 is fixedly connected to the test bench base 1.

[0020] The clamping drive component 9 includes an electric push rod 901, which extends downward and is connected to a constraint pressure head 902. The vertical cross-section of the constraint pressure head 902 is an isosceles trapezoid.

[0021] A support frame 10 is fixedly installed on the sliding seat 3 in conjunction with the air pump 4 to be tested. The vertical cross section of the support frame 10 is an inverted isosceles trapezoid.

[0022] Both the inner wall of the constraint head 902 and the inner wall of the support frame 10 are equipped with buffer anti-slip pads.

[0023] The air pump under test 4 is provided with an air supply port and a pressure relief port at both ends. The first clamping unit 6 is provided with an air supply sealing connector 11 in conjunction with the air supply port, and the second clamping unit 7 is provided with a pressure testing sealing connector 12 in conjunction with the pressure relief port.

[0024] The first clamping unit 6 includes a first clamping seat 601 and a first pneumatic drive cylinder 602. One end of the first pneumatic drive cylinder 602 is fixedly connected to the first clamping seat 601, and the other end of the first pneumatic drive cylinder 602 is fixedly connected to the air supply sealing connector 11.

[0025] The second clamping unit 7 includes a second clamping seat 701 and a second pneumatic drive cylinder 702. One end of the second pneumatic drive cylinder 702 is fixedly connected to the second clamping seat 701, and the other end of the second pneumatic drive cylinder 702 is fixedly connected to the pressure measuring and sealing joint 12.

[0026] The first clamping seat 601 is an integrally formed L-shaped structure, and the first clamping seat 601 is provided with a first through hole 13 to cooperate with the air supply sealing connector 11.

[0027] The second clamping seat 701 is an integrally formed L-shaped structure, and the second clamping seat 701 is provided with a second through hole 14 to cooperate with the pressure measuring and sealing connector 12.

[0028] Working process and principle: I. Loading and Transfer The operator places the air pump 4 to be tested on the support frame 10 of the sliding seat 3 located at the transfer station 102. The support frame 10 can play a preliminary positioning role on the bottom of the air pump 4 to be tested.

[0029] Subsequently, the operator pushes the sliding seat 3, causing it to slide along the linear guide rail 2 from the transfer station 102 to the test station 101.

[0030] II. Positioning and Locking When the sliding seat 3 moves to the test station 101, it will interact with the limit locking block 5. The sliding seat 3 is positioned and locked in the test station 101 by the limit locking block 5, ensuring that the air pump 4 under test is in the accurate test position.

[0031] III. Three-dimensional clamping and fixing The first pneumatic drive cylinder 602 and the second pneumatic drive cylinder 702 are activated. The first pneumatic drive cylinder 602 and the second pneumatic drive cylinder 702 respectively push the air supply sealing joint 11 and the pressure testing sealing joint 12 to move until the air supply sealing joint 11 and the pressure testing sealing joint 12 are tightly connected with the air supply port and the pressure relief port at both ends of the air pump 4 under test. At this point, the air pump 4 under test is clamped in the horizontal direction by both ends.

[0032] When the clamping drive 9 is activated, the electric push rod 901 pushes the constraint pressure head 902 downward, pressing it against the air pump 4 under test from the top. The constraint pressure head 902 and the support frame 10 at the bottom work together to hold the air pump 4 under test tightly from both the top and bottom. At this point, the air pump 4 under test is completely fixed in a stable rigid support structure.

[0033] IV. Pressure Relief Test The test air circuit begins operation. Compressed air enters the air supply port of the air pump under test 4 through the first through hole 13 on the first clamping seat 601 and the air supply sealing connector 11, simulating its working state. When the pressure reaches the opening set value of the internal pressure relief valve of the air pump under test 4, the pressure relief valve opens, and the high-pressure gas is discharged from the pressure relief port, flowing through the pressure testing sealing connector 12 and the second through hole 14 on the second clamping seat 701, and entering the back-end measurement system.

[0034] During this process, because the air pump 4 under test is firmly fixed, vibration is effectively suppressed, and the pressure sensor can stably and accurately capture the pressure value when the pressure relief valve is opened and closed, thereby completing the performance test.

[0035] V. Resetting and Unloading After the test, the clamping drive component 9 lifts the constraint pressure head 902, and the first pneumatic drive cylinder 602 and the second pneumatic drive cylinder 702 retract, causing the air supply sealing joint 11 and the pressure testing sealing joint 12 to separate from the air pump 4 under test. The operator releases the locking of the limit locking block 5, pushes the sliding seat 3 back to the transfer station 102, and removes the air pump 4 under test that has completed the test.

Claims

1. An air pump depressurization test bench, comprising a test bench base (1), characterized in that, The test bench base (1) is provided with a linear guide rail (2), an end clamping mechanism and a top pressing mechanism. A sliding seat (3) is slidably provided on the linear guide rail (2). An air pump (4) to be tested is provided on the sliding seat (3). The test bench base (1) includes a test station (101) and a transfer station (102) arranged adjacent to each other. The test station (101) and the transfer station (102) are both arranged along the extension direction of the linear guide rail (2). A limit locking block (5) is provided between the test station (101) and the transfer station (102) in cooperation with the sliding seat (3). The end clamping mechanism includes a first clamping unit (6) and a second clamping unit (7) arranged opposite to each other. The first clamping unit (6) and the second clamping unit (7) are located on both sides of the test station (101). The top pressing mechanism includes a support plate (8) and a pressing drive (9). The pressing drive (9) is located above the test station (101).

2. The air pump depressurization test bench according to claim 1, characterized in that, One end of the support plate (8) is fixedly connected to the clamping drive (9), and the other end of the support plate (8) is fixedly connected to the test bench base (1).

3. The air pump depressurization test bench according to claim 1, characterized in that, The clamping drive (9) includes an electric push rod (901), which extends downward and is connected to a constraint pressure head (902). The vertical section of the constraint pressure head (902) is arranged in an isosceles trapezoidal shape.

4. The air pump depressurization test bench according to claim 3, characterized in that, A support frame (10) is fixedly installed on the sliding seat (3) in conjunction with the air pump (4) to be tested. The vertical section of the support frame (10) is set in an inverted isosceles trapezoid.

5. The air pump depressurization test bench according to claim 4, characterized in that, Both the inner wall of the constraint head (902) and the inner wall of the support frame (10) are equipped with buffer anti-slip pads.

6. The air pump depressurization test bench according to claim 1, characterized in that, The air pump under test (4) is provided with an air supply port and a pressure relief port at both ends. The first clamping unit (6) is provided with an air supply sealing connector (11) in conjunction with the air supply port, and the second clamping unit (7) is provided with a pressure testing sealing connector (12) in conjunction with the pressure relief port.

7. The air pump depressurization test bench according to claim 6, characterized in that, The first clamping unit (6) includes a first clamping seat (601) and a first pneumatic drive cylinder (602). One end of the first pneumatic drive cylinder (602) is fixedly connected to the first clamping seat (601), and the other end of the first pneumatic drive cylinder (602) is fixedly connected to the air supply sealing joint (11).

8. The air pump depressurization test bench according to claim 6, characterized in that, The second clamping unit (7) includes a second clamping seat (701) and a second pneumatic drive cylinder (702). One end of the second pneumatic drive cylinder (702) is fixedly connected to the second clamping seat (701), and the other end of the second pneumatic drive cylinder (702) is fixedly connected to the pressure testing and sealing joint (12).

9. The air pump depressurization test bench according to claim 7, characterized in that, The first clamping seat (601) is an integrally formed L-shaped structure, and the first clamping seat (601) is provided with a first through hole (13) in conjunction with the air supply sealing connector (11).

10. The air pump depressurization test bench according to claim 8, characterized in that, The second clamping seat (701) is an integrally formed L-shaped structure, and the second clamping seat (701) is provided with a second through hole (14) in conjunction with the pressure testing and sealing connector (12).

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