A high-pressure oil pump plunger seal ring sealing detection tool

Abstract

The utility model relates to gasoline pump equipment detection technical field, especially a kind of high-pressure oil pump plunger sealing ring leakproofness detection tool, including frame body, drive mechanism one and air-tightness detection mechanism, the air-tightness detection mechanism includes the detection rod and detection instrument connected, the detection rod includes first end and second end, the first end is connected with the detection instrument;Drive mechanism one is located on the frame body, drive mechanism one is connected with the detection rod, for driving the second end of the detection rod inserts into sealing ring;The outer diameter of the detection rod is compatible with the inner diameter of the sealing ring, at least one through-hole is set up on the detection rod along the circumference, the through-hole is connected the sealing ring with detection instrument. The interface of detection rod and sealing ring is sealed well, ensure that there is no gas leakage in detection process, avoid the precision of interference leakage rate measurement, ensure the accuracy of detection result.

Description

Technical Field

[0001] This utility model relates to the field of gasoline pump equipment testing technology, and in particular to a tooling for testing the sealing performance of a high-pressure oil pump plunger seal ring. Background Technology

[0002] In modern engine systems, the high-pressure fuel pump plays a crucial role. Typically driven by the engine's camshaft, the high-pressure fuel pump operates by the camshaft's rotation pushing the pump's plunger in a high-speed reciprocating motion. This high-speed reciprocating motion delivers fuel at high pressure to the engine's combustion chamber, ensuring normal engine operation and power output.

[0003] During the operation of a high-pressure fuel pump, the sealing ring that mates with the pump plunger plays a crucial sealing role. The sealing performance of this ring directly affects the performance of the high-pressure fuel pump and even the entire engine. However, current high-pressure fuel pump plunger sealing rings suffer from poor sealing. When the sealing ring fails to seal properly, it can lead to a series of serious consequences. On the one hand, it can cause a decrease in engine power and fuel efficiency, affecting the overall performance and economy of the engine. On the other hand, severe leaks may cause fuel to leak into the engine compartment. The engine compartment contains high-temperature components; if leaked fuel encounters high temperatures or open flames, it can easily ignite a fire, posing a serious safety hazard to the vehicle and its occupants.

[0004] Currently, testing technologies for plunger seal leakage rates are inadequate, making it difficult to reliably and effectively detect leaks within design tolerances. This allows some high-pressure oil pumps with potential sealing problems to enter the market, increasing the risk of engine malfunctions and safety accidents. Therefore, there is an urgent need for a testing system capable of reliably and effectively detecting plunger seal leakage rates within design tolerances to ensure the normal operation of high-pressure oil pumps, improve engine performance and safety, and reduce the probability of safety accidents such as fires caused by fuel leaks. Utility Model Content

[0005] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a high-pressure oil pump plunger sealing ring sealing performance testing tool.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] This utility model provides a high-pressure oil pump plunger sealing ring sealing performance testing fixture, including a frame, a drive mechanism, and an airtightness testing mechanism. The airtightness testing mechanism includes a connected testing rod and a testing instrument. The testing rod includes a first end and a second end, with the first end communicating with the testing instrument. The drive mechanism is mounted on the frame and connected to the testing rod, used to drive the second end of the testing rod to insert into the sealing ring. The outer diameter of the testing rod is adapted to the inner diameter of the sealing ring. At least one through hole is provided circumferentially on the testing rod, and the through hole communicates with the sealing ring and the testing instrument.

[0008] The high-pressure oil pump plunger sealing ring sealing performance testing fixture provided by this utility model ensures a good seal at the interface between the testing rod and the sealing ring, preventing gas leakage during the testing process, avoiding interference with the accuracy of leakage rate measurement, and ensuring the accuracy of the test results.

[0009] Based on the above technical solution, the present invention can also be improved in the following ways:

[0010] Furthermore, the second end has a tapered structure.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the second end of the detection rod inserted into the sealing ring is set as a conical structure, which ensures that the detection rod can be quickly and effectively inserted into the sealing ring to form a seal. At the same time, the design of the conical end can reduce the wear of the sealing ring inside the sealing cap while ensuring accurate alignment with the sealing cap.

[0012] Furthermore, when the number of through holes is greater than one, each through hole is evenly distributed along the circumference of the detection rod.

[0013] Furthermore, the number of through holes is four.

[0014] Furthermore, the diameter of the through hole is 0.6-1.0 mm.

[0015] Furthermore, the diameter of the through hole is 0.8 mm.

[0016] The beneficial effect of adopting the above-mentioned further technical solution is that it ensures that all or most of the gas in the detection process enters the detector through the through hole, thereby improving the accuracy of the detection results.

[0017] Furthermore, the driving mechanism is a cylinder.

[0018] The beneficial effect of adopting the above-mentioned further technical solution is that the insertion depth of the detection rod into the sealing ring is controlled by moving the detection rod through the cylinder.

[0019] Furthermore, the frame includes a base, a support, a first connector, a second connector, a third connector, and a fourth connector. The base is connected to the support. The first drive mechanism is connected to the support via the first connector. The detection rod is connected to the output end of the first drive mechanism via the second connector. The second connector is connected to the third connector. The fourth connector is used to fix the sealing cap positioning mechanism.

[0020] Furthermore, the detection rod is detachably connected to the second connector, and the sealing cap positioning mechanism is detachably connected to the fourth connector.

[0021] Furthermore, it also includes a second drive mechanism, the output end of which is connected to the fourth connector.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] The high-pressure oil pump plunger sealing ring sealing performance testing fixture provided by this utility model allows for the detection of gas leakage rate when the testing rod is inserted into the sealing ring and the testing instrument is turned on. The interface between the testing rod and the sealing ring is well sealed, ensuring no gas leakage during the testing process, avoiding interference with the accuracy of the leakage rate measurement, and ensuring the accuracy of the test results. Attached Figure Description

[0024] Figure 1 This diagram shows a structural schematic of a high-pressure oil pump plunger seal ring sealing performance testing fixture according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the high-pressure oil pump plunger seal ring sealing performance testing fixture from another angle according to an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the detection rod is shown;

[0027] Figure 4 A schematic diagram showing the structure at another angle of the detection rod;

[0028] Figure 5 Showing the front view of the detection rod;

[0029] Figure 6 This diagram illustrates the application of the high-pressure oil pump plunger seal ring sealing performance testing fixture according to an embodiment of the present invention.

[0030] Figure label:

[0031] 1. Drive mechanism one; 2. Detection rod; 3. Through hole; 4. Base; 5. Bracket; 6. Connector one; 7. Connector two; 8. Connector three; 9. Connector four; 10. Sealing cap; 11. Through hole; 12. Positioning boss; 13. Threaded hole; 14. Drive mechanism two; 15. Sealing cap positioning mechanism; 16. Sensor. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0033] See Figures 1 to 6 A high-pressure oil pump plunger sealing ring sealing performance testing fixture includes a frame, a drive mechanism 1, and an airtightness testing mechanism. The airtightness testing mechanism includes a connected testing rod 2 and a testing instrument. The testing rod 2 includes a first end and a second end, with the first end communicating with the testing instrument. The drive mechanism 1 is mounted on the frame and connected to the testing rod 2, used to drive the second end of the testing rod 2 into the sealing ring inside the sealing cap 10. The outer diameter of the testing rod 2 is adapted to the inner diameter of the sealing ring. At least one through hole 11 is provided circumferentially on the testing rod 2, and the through hole 11 communicates the sealing ring and the testing instrument.

[0034] The high-pressure oil pump plunger seal ring sealing performance testing fixture also includes a second drive mechanism 14, a sealing cap positioning mechanism 15, and a sensor 16. The sensor 16 is used to sense the presence or absence of a sealing cap 10. When the sensor 16 detects the presence of a sealing cap 10, the first drive mechanism 11 controls the detection rod 2 to fall for a sealing performance test. The frame includes a base 4, a bracket 5, a first connector 6, a second connector 7, a third connector 8, and a fourth connector 9. The base 4 is connected to the bracket 5. The first drive mechanism 11 is connected to the bracket 5 via the first connector 6. The detection rod 2 is connected to the output end of the first drive mechanism 11 via the second connector 7. The second connector 7 is connected to the third connector 8. The second drive mechanism 14... 14 is mounted on the connecting member 3 8. The output end of the driving mechanism 2 14 is connected to the connecting member 4 9. The connecting member 4 9 is used to fix the sealing cap positioning mechanism 15. The driving mechanism 2 14 can drive the sealing cap positioning mechanism 15 to move vertically. The detection rod 2 is detachably connected to the connecting member 2 7, and the sealing cap positioning mechanism 15 is detachably connected to the connecting member 4 9. Specifically, the detection rod 2 and the connecting member 2 7, and the sealing cap positioning mechanism 15 and the connecting member 4 9 are all connected by bolts. The connecting member 2 7 and the connecting member 4 9 are both L-shaped structural parts, which facilitates connection with the detection rod 2 and the sealing cap positioning mechanism 15, respectively. After the sealing test is completed, the driving mechanism 1 drives the detection rod 2 to move upward, thereby pulling it out of the sealing cap 10. During this process, the output end of the driving mechanism 2 14 moves downward, causing the sealing cap positioning mechanism 15 to fix and press the sealing cap 10, preventing the sealing cap 10 from being lifted.

[0035] See Figures 3 to 5 The second end of the detection rod 2 has a tapered structure and is made of high-strength 304 stainless steel. There are four through holes 11, which are evenly distributed around the circumference of the detection rod 2, and the diameter of each through hole 11 is 0.8 mm. The end of the detection rod 2 near the first end is provided with a positioning boss 12, and the positioning boss 12 is provided with a threaded hole 13 to realize the threaded connection between the detection rod 2 and the connecting piece 2 7.

[0036] Both drive mechanism 1 and drive mechanism 2 are high-precision cylinders; the detector is an ATEQ airtightness detector.

[0037] See Figure 6When testing the sealing performance of a high-pressure oil pump plunger seal ring using the high-pressure oil pump plunger seal ring sealing performance testing fixture provided by this utility model, firstly, the testing rod 2 is fixed to the connecting part 2 7 with bolts. Then, the sealing cap positioning mechanism 15, which is fixed with the sealing cap 10, is fixed to the connecting part 4 9 with bolts. Then, the driving mechanism 1 drives the testing rod 2 to approach the sealing cap 10, so that the second end of the testing rod 2 is inserted into the sealing ring inside the sealing cap 10, making the outer wall of the testing rod 2 tightly fit with the inner wall of the sealing ring to form a seal. Then, 5 Bar compressed air is injected into the sealing ring through the first end of the testing rod 2. Subsequently, the first end of the testing rod 2 is connected to the testing instrument through a nylon tube. By monitoring the pressure change, the gas leakage rate of the sealing ring is detected.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling for testing the sealing performance of a high-pressure oil pump plunger seal ring, characterized in that, The device includes a frame, a drive mechanism, and an airtightness testing mechanism. The airtightness testing mechanism includes a connected testing rod and a testing instrument. The testing rod has a first end and a second end, with the first end communicating with the testing instrument. The drive mechanism is mounted on the frame and connected to the testing rod, used to drive the second end of the testing rod to insert into a sealing ring. The outer diameter of the testing rod is adapted to the inner diameter of the sealing ring. At least one through hole is provided on the testing rod along the circumferential direction, and the through hole communicates with the sealing ring and the testing instrument.

2. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 1, characterized in that, The second end has a tapered structure.

3. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 1, characterized in that, When the number of through holes is greater than one, each through hole is evenly distributed along the circumference of the detection rod.

4. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 1, characterized in that, The number of through holes is four.

5. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 3 or 4, characterized in that, The diameter of the through hole is 0.6-1.0 mm.

6. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 5, characterized in that, The diameter of the through hole is 0.8 mm.

7. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 1, characterized in that, The drive mechanism is a cylinder.

8. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 1, characterized in that, The frame includes a base, a support, a first connector, a second connector, a third connector, and a fourth connector. The base is connected to the support. The first drive mechanism is connected to the support via the first connector. The detection rod is connected to the output end of the first drive mechanism via the second connector. The second connector is connected to the third connector. The fourth connector is used to fix the sealing cap positioning mechanism.

9. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 8, characterized in that, The detection rod is detachably connected to the second connector, and the sealing cap positioning mechanism is detachably connected to the fourth connector.

10. The high-pressure oil pump plunger seal ring sealing performance testing fixture according to claim 8, characterized in that, It also includes a second drive mechanism, the output end of which is connected to the fourth connector.

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