Device and method for verifying the radial working reliability of a rubber sealing ring with circular cross-section

Abstract

The application discloses a device and method for verifying the radial working reliability of a circular-section rubber sealing ring, wherein a valve core is arranged in a shell inner hole and can slide in the shell inner hole, one end of the shell inner hole is connected with an oil return joint, a spring is arranged between the valve core and the oil return joint, an outlet joint and an inlet joint inner hole can be communicated with the shell inner hole, a circular-section rubber sealing ring to be tested is arranged between the valve core and the shell, the shell inner hole is further provided with a type hole A, and the other end of the shell inner hole is connected with high-pressure oil; when the valve core moves to an extreme position close to the oil return joint, the inlet joint and the outlet joint are communicated, pressure oil is discharged from the outlet joint, and the circular-section rubber sealing ring on the valve core passes through the type hole A; when the valve core moves to an extreme position away from the oil return joint, the inlet joint and the outlet joint are separated by the circular-section rubber sealing ring to be tested. The device and method solve the problems of high risk, long verification period and high verification cost of rubber sealing ring performance verification.

Description

Technical Field

[0001] This invention belongs to the field of sealing ring performance testing technology, and particularly relates to an apparatus and method for verifying the radial working reliability of a circular cross-section rubber sealing ring. Background Technology

[0002] Circular cross-section rubber seals are indispensable components in our company's products. As our products continue to upgrade and the operating environment becomes increasingly harsh, the requirements for rubber seals are becoming more stringent. Therefore, our company is constantly developing new materials and structures for seals with better functionality, performance, and reliability. At the same time, the demand for seals is also increasing, necessitating the addition of new seal suppliers to better ensure production targets are met.

[0003] Currently, the performance testing and verification of newly developed rubber seals or those produced by new suppliers mainly involves testing them on fuel accessory products or when they are installed in engines. This method carries significant risk; failure leads to extremely high costs and time-consuming repeated testing and verification. Newly developed seals or those produced by new suppliers should undergo relevant testing and verification before being installed in products or engines. Verified seals lay the foundation for subsequent testing, reducing risk and cost. However, there is currently no device or method for verifying circular cross-section rubber seals. Radial static and radial dynamic seals are among the main application scenarios for circular cross-section rubber seals in the company's fuel accessory products. For radial applications of seals, a device and verification method are needed to verify the radial operational reliability of circular cross-section rubber seals. Summary of the Invention

[0004] Purpose of the invention

[0005] To address the aforementioned technical problems, this invention provides an apparatus and method for verifying the radial working reliability of a circular cross-section rubber sealing ring. It can not only verify the functional performance of the sealing ring, but also verify its environmental adaptability, motion reliability, and lifespan wear. The method is simple and easy to operate.

[0006] Invention Technology Solutions

[0007] The device for verifying the radial working reliability of a circular cross-section rubber seal includes a valve core, which is disposed in the inner hole of a housing and can slide within the housing. One end of the inner hole of the housing is connected to a return oil connector. A spring is installed between the valve core and the return oil connector. The housing is also connected to an outlet connector and an inlet connector, the inner holes of which can communicate with the inner hole of the housing. The circular cross-section rubber seal to be tested is disposed between the valve core and the housing. The inner hole of the housing also has a shaped hole A. High-pressure oil is connected to the other end of the inner hole of the housing. When the valve core moves to its limit position towards the end of the return oil connector, the inlet connector and the outlet connector communicate, and the pressurized oil exits from the outlet connector. At the same time, the circular cross-section rubber seal on the valve core passes through the shaped hole A. When the valve core moves to its limit position away from the end of the return oil connector, the inlet connector and the outlet connector are separated by the circular cross-section rubber seal to be tested.

[0008] Preferably, the high-pressure oil is passed through the inner hole of the housing and connected to a high-pressure oil connector.

[0009] Preferably, a spring seat is provided in the groove at one end of the return oil connector near the valve core, the spring is provided between the spring seat and the valve core, and an adjusting shim is provided between the spring and the spring seat.

[0010] Preferably, pipe joint sealing rings are provided between the shell and the high-pressure oil connector, return oil connector, outlet connector, and inlet connector.

[0011] Preferably, the outer circumferential surface of the valve core is provided with an annular oil passage groove that allows the inlet connector and the outlet connector to communicate.

[0012] Preferably, the outer circumferential surface of the valve core is provided with a sealing ring groove for placing a rubber sealing ring with a circular cross-section to be tested.

[0013] Preferably, the housing is threadedly connected to the high-pressure oil connector, return oil connector, outlet connector, and inlet connector.

[0014] The method of using the device for verifying the radial working reliability of a circular cross-section rubber seal includes the following steps:

[0015] (1) Assemble the circular cross-section rubber sealing ring to be verified onto the valve core in the device;

[0016] (2) Place the device in an environmental chamber. Connect the oil tank to the D1 oil pump, the return oil connector, and the outlet pipe connector respectively. Connect the D1 oil pump to the high-pressure oil connector and the inlet connector respectively. Install a high-pressure oil solenoid valve and a P1 pressure sensor between the D1 oil pump and the high-pressure pipe connector. Install an inlet solenoid valve and a P2 pressure sensor between the D1 oil pump and the inlet connector. Install an adjustable valve and a P3 pressure sensor between the outlet pipe connector and the oil tank. The electronic controller controls and collects the on / off working status and data signals of the D1 oil pump, the high-pressure oil solenoid valve, the inlet solenoid valve, the P1 pressure sensor, and the P2 pressure sensor.

[0017] (3) Set the ambient temperature of the environmental chamber and the medium temperature in the oil tank to different temperature combinations; then, in accordance with the requirements of the circular cross-section rubber seal verification outline, perform the performance verification of the circular cross-section rubber seal.

[0018] Preferably, the performance of the circular cross-section rubber sealing ring includes static sealing performance, motion response, reliability of through-hole movement, and lifespan wear.

[0019] Preferably, during static sealing verification, the electronic controller controls the D1 oil pump to be energized, the D1 oil pump outputs a certain pressure oil, the high-pressure oil solenoid valve is de-energized, the high-pressure oil inlet is not connected to the oil, the inlet solenoid valve is energized, the pressure oil from the D1 oil pump enters the cavity of the housing from the inlet connector, the pipeline at the outlet connector is disconnected, and at the outlet connector, the oil leakage is detected under different temperatures and different P2 pressures.

[0020] During motion response verification, the electronic controller energizes the D1 oil pump and the inlet solenoid valve, and adjusts the P2 pressure to the specified value. When the high-pressure oil solenoid valve is energized, the pressurized oil pushes the valve core against the spring force, pushing it towards the end closest to the return oil connector until it reaches its maximum position. The pressurized oil at the inlet connector flows out through the valve core from the outlet connector, and the pressure after the outlet connector is fed back to the electronic controller via the P3 pressure sensor. The time from the moment the high-pressure oil solenoid valve is energized to the time when the P3 pressure sensor provides pressure feedback is the dynamic response time. The electronic controller collects time, pressure, and temperature data. The motion response time of the valve core is tested under different temperatures and different P1 pressure values.

[0021] During the reliability verification of the through-hole movement, the circular cross-section rubber sealing ring and valve core to be verified are assembled using an over-fit method: the electronic controller controls the D1 oil pump and the inlet solenoid valve to be in the energized state, and adjusts the P2 pressure value; when the high-pressure oil solenoid valve is energized, the valve core moves towards the end closer to the return oil connector under the action of pressurized oil until it reaches the top; when the high-pressure oil solenoid valve is de-energized, the valve core moves away from the return oil connector under the action of the spring until it stops. The high-pressure oil solenoid valve is energized and de-energized 50 times under different ambient temperatures and different medium temperatures; according to the static sealing verification requirements, oil leakage is detected, and the appearance of the circular cross-section rubber sealing ring is disassembled and inspected for damage;

[0022] During the life wear verification, the electronic controller controls the D1 oil pump and the inlet solenoid valve to be energized, and adjusts the P2 pressure value. Under different ambient temperatures, different medium temperatures, and different P2 pressure values, the high-pressure oil solenoid valve is energized and de-energized no less than 200 times in each state. Oil leakage is detected according to the static sealing verification requirements, and the wear and damage of the rubber sealing ring of the test circular section are checked.

[0023] Advantages of this invention: The device and method solve the problems of high risk, long verification cycle, and high verification cost in the performance verification of rubber sealing rings. The method is simple and easy to operate; the verification cycle is short; the verification cost is low; it can verify high temperature environment; it can verify low temperature environment; it can verify static and dynamic seals; it can verify the reliability of the through hole movement; and it can verify life wear. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the device for verifying the radial working reliability of a circular cross-section rubber seal ring according to the present invention.

[0025] Figure 2 This is a schematic diagram illustrating the working principle of the radial sealing test of the sealing ring.

[0026] Figure 3 This is a schematic diagram of the electronic controller.

[0027] In the diagram: 1-Outlet connector, 2-Adjusting pad, 3-Spring, 4-Spring seat, 5-Return oil connector, 6-Valve core, 7-Rubber sealing ring with round cross-section to be tested, 8-Inlet connector, 9-High-pressure oil connector, 10-Housing, 11-Pipe connector sealing ring, A-Through hole, 12-Oil tank, 13-D1 oil pump, 14-High-pressure oil solenoid valve, 15-Inlet solenoid valve, 16-P1 pressure sensor, 17-P2 pressure sensor, 18-Device, 19-P3 pressure sensor, 20-Adjustable valve, 21-Environmental chamber, 22-Electronic controller. Detailed Implementation

[0028] The present invention is achieved through the following technical solution.

[0029] The device used to verify the radial working reliability of circular cross-section rubber seals consists of the following components: Figure 1As shown, the assembly includes an outlet connector 1, an adjusting shim 2, a spring 3, a spring seat 4, a return oil connector 5, a valve core 6, a circular cross-section rubber sealing ring 7, an inlet connector 8, a high-pressure oil connector 9, a housing 10, and a pipe connector sealing ring 11. The valve core 6 is located within the inner bore of the housing 10 and can slide within it. One end of the inner bore of the housing 10 is threadedly connected to the high-pressure oil connector 9, which serves as the high-pressure oil inlet. The other end of the inner bore of the housing 10 is threadedly connected to the return oil connector 5, which serves as the return oil port. A spring seat 4 is located in a groove near the valve core 6 of the return oil connector 5. A spring 3 is positioned between the spring seat 4 and the valve core 6, and an adjusting shim 2 is positioned between the spring 3 and the spring seat. The housing 10 is also threadedly connected to the outlet connector 1 and the inlet connector 8. The inner bores of both the outlet connector 1 and the inlet connector 8 can communicate with the inner bore of the housing 10. The outer circumferential surface of the valve core 6 has an annular sealing ring groove and an annular oil passage groove for mounting the circular cross-section rubber sealing ring 7 to be tested. The inner bore of the housing 10 also has a shaped hole A. Pipe joint sealing rings are provided between the housing 10 and the high-pressure oil connector 9, return oil connector 5, outlet connector 1, and inlet connector 8.

[0030] The sealing ring groove structure on valve core 6 matches the size of the circular cross-section rubber sealing ring 7, and can be assembled in groups according to different matching requirements.

[0031] The working principle of the verification device is as follows: When pressure oil is supplied to inlet connector 8 and high-pressure oil connector 9, the high-pressure oil overcomes spring 3 and pushes valve core 6 to the right until it rests against spring seat 4. Inlet connector 8 communicates with outlet connector 1, and pressure oil flows out from outlet connector 1. At the same time, the circular cross-section rubber sealing ring 7 on valve core 6 passes through hole A and operates through the hole. When pressure oil is supplied to inlet connector 8 and pressure oil is not supplied to high-pressure oil connector 9, valve core 6 stops to the left under the action of spring 3, and inlet connector 8 and outlet connector 1 are separated by the circular cross-section rubber sealing ring 7.

[0032] The function of the verification device is to verify the static sealing performance of the tested circular cross-section rubber seal 7, the dynamic response time of the valve core 6 equipped with the tested circular cross-section rubber seal 7, the reliability of the movement of the tested circular cross-section rubber seal 7 through the hole, and the life wear of the tested circular cross-section rubber seal 7 under high temperature environment, low temperature environment, high temperature medium and low temperature medium conditions.

[0033] The experimental principle diagram of the method for verifying the working reliability of the circular cross-section rubber sealing ring described in this invention is as follows. Figure 2 and Figure 3As shown, the device 18 used to verify the radial working reliability of the circular cross-section rubber seal is placed in the environmental chamber 21. The oil tank 12 is connected to the D1 oil pump 13, the return oil connector 5, and the outlet pipe connector 1 through pipelines. The D1 oil pump 13 is connected to the high-pressure oil connector 9 and the inlet connector 8 through pipelines. A high-pressure oil solenoid valve 14 and a P1 pressure sensor 16 are installed on the pipeline between the D1 oil pump 13 and the high-pressure pipe connector 9. An inlet solenoid valve 15 and a P2 pressure sensor 17 are installed on the pipeline between the D1 oil pump 13 and the inlet connector 8. An adjustable valve 20 and a P3 pressure sensor 19 are installed on the pipeline between the outlet pipe connector 1 and the oil tank 12.

[0034] Figure 3 The electronic controller shown controls and acquires the on / off working status and data signals of D1 oil pump 13, high-pressure oil solenoid valve 14, inlet solenoid valve 15, P1 pressure sensor 16, and P2 pressure sensor 17.

[0035] according to Figure 2 Connect the test pipeline, and set the ambient temperature of the environmental chamber 21 and the medium temperature in the oil tank 12 to different temperature combinations. Under the action of different temperature combinations, install the circular cross-section rubber sealing ring 7 to be verified in the device 18, place it in the environmental chamber for storage for 30 minutes, and after the internal and external temperatures of the device 18 stabilize, perform static sealing verification, dynamic response verification, through-hole movement reliability verification, and life wear verification.

[0036] Static sealing verification: D1 oil pump 13 is powered on, high-pressure oil solenoid valve 14 is de-energized, inlet solenoid valve 15 is connected, outlet connector 1 is disconnected from the pipeline, and oil leakage is detected through outlet connector 1 at different temperatures and different P2 pressures.

[0037] Dynamic response verification: D1 oil pump 13 is energized, inlet solenoid valve 15 is connected, P2 pressure is adjusted to the specified pressure value, outlet connector 1 is connected to the pipeline, adjustable valve 20 is adjusted, and high-pressure oil solenoid valve 14 is energized. Figure 3 The electronic controller 22 collects data signals and measures the response time from the energization of the high-pressure oil solenoid valve 14 to the pressure sensor 19 (P3) applying pressure. The response time is measured under different temperatures and different P1 pressure values.

[0038] Reliability verification of the through-hole movement: With oil pump D1 13 energized, inlet solenoid valve 15 connected, pressure P2 adjusted to the specified value, outlet connector 1 connected to the pipeline, and high-pressure oil solenoid valve 14 energized and de-energized 50 times at different temperatures. The circular cross-section rubber seal 7 was disassembled and inspected for damage. The key difference between this verification method and the life wear verification method lies in the over-matching of the circular cross-section rubber seal 7 and the valve core 6.

[0039] Life and Wear Verification: With the D1 oil pump energized, the inlet solenoid valve 15 is connected, and the outlet connector 1 is connected to the pipeline. The high-pressure oil solenoid valve 14 is switched on and off. Under different ambient temperatures, different medium temperatures, and different P2 pressure values, the number of on / off cycles in each state is no less than 200. According to the static sealing verification requirements, check for oil leakage, and disassemble and inspect the circular cross-section rubber sealing ring 7 for wear and damage.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent transformations or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention. The technologies, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A device for verifying the radial working reliability of a rubber sealing ring of circular cross-section, characterized in that, The valve core is arranged in the inner hole of the shell and can slide in the inner hole of the shell, one end of the inner hole of the shell is connected with the oil return joint, a spring is arranged between the valve core and the oil return joint, an outlet joint and an inlet joint are further connected to the shell, the inner holes of the outlet joint and the inlet joint can communicate with the inner hole of the shell, a circular cross-section rubber sealing ring to be tested is arranged between the valve core and the shell, a type hole A is further arranged in the inner hole of the shell, the other end of the inner hole of the shell is connected with the high-pressure oil, when the valve core moves to the limit position close to the oil return joint, the inlet joint communicates with the outlet joint, the pressure oil is discharged from the outlet joint, and the circular cross-section rubber sealing ring on the valve core passes through the type hole A; when the valve core moves to the limit position away from the oil return joint, the inlet joint and the outlet joint are separated by the circular cross-section rubber sealing ring to be tested. The inner hole of the shell connected with the high-pressure oil is connected with the high-pressure oil joint. An annular oil passage is arranged on the outer circumferential surface of the valve core and can communicate the inlet joint with the outlet joint. A sealing ring groove is arranged on the outer circumferential surface of the valve core and is used for placing the circular cross-section rubber sealing ring to be tested.

2. The device for verifying the radial working reliability of a rubber sealing ring with a circular cross-section according to claim 1, characterized in that, A spring seat is arranged in the groove close to the valve core of the oil return joint, a spring is arranged between the spring seat and the valve core, and an adjusting pad is arranged between the spring and the spring seat.

3. The device for verifying the radial working reliability of a rubber sealing ring with a circular cross-section according to claim 1, characterized in that, Pipe joint sealing rings are arranged between the shell and the high-pressure oil joint, the oil return joint, the outlet joint and the inlet joint.

4. The device for verifying the radial working reliability of a rubber sealing ring with a circular cross-section according to claim 1, characterized in that, The shell is threadedly connected with the high-pressure oil joint, the oil return joint, the outlet joint and the inlet joint.

5. The method of using the device for verifying the radial working reliability of a rubber sealing ring with a circular cross-section according to claim 1, characterized in that, The method comprises the following steps: assembling the circular cross-section rubber sealing ring to be tested on the valve core in the device; placing the device in an environmental box, connecting the oil tank with a D1 oil pump, an oil return joint and an outlet joint, connecting the D1 oil pump with a high-pressure oil joint and an inlet joint, arranging a high-pressure oil electromagnetic valve and a P1 pressure sensor between the D1 oil pump and the high-pressure oil joint, arranging an inlet electromagnetic valve and a P2 pressure sensor between the D1 oil pump and the inlet joint, arranging an adjustable valve and a P3 pressure sensor between the outlet joint and the oil tank; an electronic controller controls and collects the on-off electrical working state and data signal of the D1 oil pump, the high-pressure oil electromagnetic valve, the inlet electromagnetic valve, the P1 pressure sensor and the P2 pressure sensor; the environmental temperature of the environmental box and the medium temperature in the oil tank are set as different temperature combinations; then, according to the verification outline of the circular cross-section rubber sealing ring, the performance verification of the circular cross-section rubber sealing ring is carried out.

6. The method of using the device for verifying the radial working reliability of a rubber sealing ring with a circular cross-section according to claim 5, characterized in that, The performance of the circular cross-section rubber sealing ring includes static sealing property, motion response, type hole motion reliability and service life wear.

7. The method of using the device for verifying the radial working reliability of a rubber sealing ring with a circular cross-section according to claim 6, characterized in that, In the static sealing verification, the electronic controller controls the D1 oil pump to be powered on, the D1 oil pump outputs certain pressure oil, the high-pressure oil electromagnetic valve is powered off, the high-pressure oil inlet is not connected to oil, the inlet electromagnetic valve is powered on, the pressure oil from the D1 oil pump is connected to the cavity of the shell from the inlet joint, the pipeline at the outlet joint is disconnected, at the outlet joint, the oil leakage under different temperatures and different P2 pressures is detected; in the motion response verification, the electronic controller controls the D1 oil pump and the inlet electromagnetic valve to be powered on, and the P2 pressure is adjusted to a specified pressure value; when the high-pressure oil electromagnetic valve is powered on, the pressure oil pushes the valve core to overcome the spring force, and the valve core is pushed to the end close to the return oil joint to be in abutment, the pressure oil at the inlet joint flows out from the outlet joint through the valve core, and the pressure after the outlet joint is fed back to the electronic controller through the P3 pressure sensor; from the moment when the high-pressure oil electromagnetic valve is powered on, to the time when the P3 pressure sensor has pressure feedback, the dynamic response time is obtained, and the time, pressure, and temperature data are collected by the electronic controller; under different temperatures and different P1 pressure values, the motion response time of the valve core is detected; in the over-hole motion reliability verification, the circular cross-section rubber sealing ring and the valve core are assembled in an over-matching manner: the electronic controller controls the D1 oil pump and the inlet electromagnetic valve to be powered on, and adjusts the P2 pressure value; when the high-pressure oil electromagnetic valve is powered on, the valve core moves to the end close to the return oil joint under the action of the pressure oil to be in abutment, and when the high-pressure oil electromagnetic valve is powered off, the valve core moves to the end away from the return oil joint under the action of the spring to be in abutment; under different environmental temperatures and different medium temperatures, the high-pressure oil electromagnetic valve is powered on and off for 50 times; according to the static sealing verification requirements, the oil leakage is detected, and the appearance of the circular cross-section rubber sealing ring is disassembled and checked whether it is damaged; in the life wear verification, the electronic controller controls the D1 oil pump and the inlet electromagnetic valve to be powered on, and adjusts the P2 pressure value; under different environmental temperatures, different medium temperatures, and different P2 pressure values, the high-pressure oil electromagnetic valve is powered on and off for not less than 200 times in each state; according to the static sealing verification requirements, the oil leakage is detected, and whether the circular cross-section rubber sealing ring to be tested is worn and damaged is checked.

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