Multi-working-condition reciprocating sealing ring modular testing device

Abstract

The utility model provides a multi-working-condition reciprocating sealing ring modularization testing device, which relates to the technical field of fluid transmission sealing and comprises a first end cover, a second end cover, a sealing testing block, a piston rod, a sealing shell and a pressure sensor. The sealing test block is arranged in the sealing shell; the middle end of the piston rod is in contact with the inner side wall of the sealing test block; a first mounting opening is formed in the center of the first end cover, the second end cover is arranged in the first mounting opening, the outer side wall of a boss of the first end cover is in contact with the inner side wall of the end part of the sealing shell, and the inner side wall of the boss of the first end cover is in contact with the sealing test block. According to the utility model, through the arrangement of the sealing test block and the sealing shell, the device can carry out rapid replacement test on sealing rings with different sizes and types under different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transmission sealing, and particularly relates to a modular test device for multi-condition reciprocating sealing rings. Background Technique

[0002] The hydraulic reciprocating sealing ring is a key sealing element in the hydraulic system, mainly used to prevent the leakage of hydraulic medium during the reciprocating motion and ensure the normal operation of the system. The sealing ring test can not only be used to guide the verification of the sealing lubrication theory and then realize the forward design of the sealing ring structure, but also can carry out the reverse optimization design of the sealing structure according to the test results. Common hydraulic reciprocating sealing rings include various types such as O-rings, U-rings, V-rings, Gleitrings and Struthers seals, etc., each of which has its own characteristics and is suitable for different working conditions and application scenarios. However, the existing sealing ring test devices cannot carry out tests on multiple environments or different types of sealing rings at the same time, increasing the time cost and economic cost of the sealing ring test and prolonging the R & D cycle of high-performance sealing rings. Content of the Utility Model

[0003] The purpose of the utility model is to provide a modular test device for multi-condition reciprocating sealing rings, which realizes the modular test of multi-condition reciprocating sealing rings in the same device through the cooperation of a sealing test block and a sealing housing.

[0004] In view of the problems existing in the prior art, the utility model provides a modular test device for reciprocating seals under multiple working conditions, which includes a first end cover, a second end cover, a seal test block, a piston rod, a seal housing and a pressure sensor. The first end cover and the second end cover are respectively arranged at both ends of the seal housing. The seal test block is arranged inside the seal housing. The middle end of the piston rod contacts the inner side wall of the seal test block. A first installation opening is formed in the center of the first end cover. The second end cover is arranged in the first installation opening. The outer side wall of the boss of the first end cover contacts the inner side wall of the end of the seal housing. The inner side wall of the boss of the first end cover contacts the seal test block. A second installation opening is formed in the center of the second end cover. The piston rod passes through the second installation opening and then contacts the seal test block. A plurality of liquid guide holes, a plurality of positioning holes and a plurality of lead holes are formed in the boss of the first end cover. The installation end of the pressure sensor is installed in the positioning hole, and the test end of the pressure sensor contacts the seal test block. A first oil outlet, a second oil outlet, a first oil inlet, a second oil inlet, a first liquid tank, a second liquid tank, a first leakage port and a second leakage port are formed in the seal housing. The first liquid tank and the second liquid tank are annular grooves, which are formed in the inner side wall of the seal housing, and the first liquid tank and the second liquid tank are respectively communicated with the first oil outlet, the second oil outlet, the first oil inlet and the second oil inlet. A first volume chamber and a second volume chamber are respectively arranged at both ends of the seal test block. The first oil inlet is communicated with the first volume chamber through the liquid guide hole. The first oil outlet is communicated with the first volume chamber through the liquid guide hole. The second oil inlet is communicated with the second volume chamber through the liquid guide hole. The second oil outlet is communicated with the second volume chamber through the liquid guide hole. The first leakage port and the second leakage port are formed in the side wall of the seal housing corresponding to the pressure sensor.

[0005] Further, a first seal groove is formed at the connection between the second end cover and the piston rod, and a first seal ring is arranged in the first seal groove. A second seal groove is formed at the contact between the second end cover and the first end cover, and a second seal ring is arranged in the second seal groove. A third seal groove is formed at the connection between the first end cover and the seal housing, and a third seal ring is arranged in the third seal groove. A fourth seal groove is formed at the contact between the outer side wall of the boss of the first end cover and the inner side wall of the seal housing, and a fourth seal ring is arranged in the fourth seal groove. A fifth seal groove is formed at the contact between the inner side wall of the boss of the first end cover and the seal test block, and a fifth seal ring is arranged in the fifth seal groove. A sixth seal groove is formed at the connection between the seal test block and the piston rod, and a test seal ring is arranged in the sixth seal groove.

[0006] Further, a first bolt hole and a third bolt hole are formed in the first end cover. The first bolt passes through the first bolt hole and the fourth bolt hole of the sealing housing to connect the first end cover and the sealing housing. A second bolt hole is formed in the second end cover. The second bolt passes through the second bolt hole and the third bolt hole to connect the second end cover and the first end cover.

[0007] Further, the power line of the pressure sensor is connected to an external power supply through the lead hole.

[0008] Further, the multiple positioning holes are three positioning holes, which are evenly distributed on the boss of the first end cover, and a pressure sensor is installed in each positioning hole.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] 1. Through the arrangement of the sealing test block, the first end cover, the second end cover and the sealing housing, two volume chambers are formed inside the device, and the two volume chambers do not communicate with each other. Different media or fluids with different pressures can be introduced into the two volume chambers. Therefore, the device can test the working conditions where the media at both ends of the sealing ring are inconsistent and the pressures are inconsistent.

[0011] 2. By arranging six pressure sensors circumferentially at both ends of the sealing test block, the friction forces of the forward stroke and the return stroke of the sealing ring to be measured are measured when the piston rod reciprocates, and the friction force test signal does not include the reciprocating inertia force of the piston rod. Therefore, when the piston rod reciprocates linearly at a variable speed, the device can conveniently and quickly obtain the friction force during the reciprocation of a single sealing ring to be measured, improving the accuracy of friction force measurement.

[0012] 3. The utility model is an assembled sealing test device. By modularly designing the device components, rapid replacement for measuring the friction forces of reciprocating sealing rings of different sizes and different types can be realized. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the overall structure of the multi-condition reciprocating sealing ring modular test device of the utility model;

[0014] Figure 2 is a cross-sectional view of the multi-condition reciprocating sealing ring modular test device of the utility model;

[0015] Figure 3 is an axonometric view of the first end cover of the multi-condition reciprocating sealing ring modular test device of the utility model;

[0016] Figure 4 is a structural diagram of the second end cover of the multi-condition reciprocating sealing ring modular test device of the utility model;

[0017] Figure 5 This is a structural diagram of the sealing test block for the multi-condition reciprocating seal ring modular test device of the present utility model.

[0018] Main reference numerals:

[0019] 1. First end cover; 2. First bolt; 3. Pressure sensor; 4. Second end cover; 5. Piston rod; 6. Second bolt; 7. Sealing housing; 8. First leakage port; 9. Second leakage port; 10. First oil inlet; 11. Sealing test block; 12. Second oil inlet; 13. First volume chamber; 14. Liquid guiding hole; 15. Second volume chamber; 16. Liquid tank; 17. Positioning hole; 18. Lead hole; 19. First bolt hole; 20. Second bolt hole; 21. First sealing groove; 22. Second sealing groove; 23. Third sealing groove; 24. Fourth sealing groove; 25. Fifth sealing groove; 26. Sixth sealing groove; 27. First oil outlet; 28. Second oil outlet; 29. First sealing ring; 30. Second sealing ring; 31. Third sealing ring; 32. Fourth sealing ring; 33. Fifth sealing ring; 34. Test sealing ring. Specific embodiments

[0020] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the meaning of "a plurality of" is two or more; in the terms, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. The specific orientation of the element needs to be designed according to the specific situation.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0023] To elaborate on the structural features, achieved objectives and effects of the present utility model, the following will be described in detail with reference to the accompanying drawings of the specification.

[0024] The present utility model provides a multi-condition reciprocating seal ring modular test device, as Figures 1-5As shown in the figure, it includes a first end cap 1, a second end cap 4, a seal test block 11, a piston rod 5, a seal housing 7, and a pressure sensor 3. The first end cap 1 and the second end cap 4 are respectively arranged at both ends of the seal housing 7. The seal test block 11 is arranged inside the seal housing 7, and the displacement of the seal test block 11 is restricted by the seal housing 7 in the radial direction. The middle end of the piston rod 5 is horizontally connected to the inner side wall of the seal test block 11 and can move along the axis of the seal test block 11.

[0025] A first mounting opening is provided at the center of the first end cap 1. The second end cap 4 is arranged in the first mounting opening. The outer side wall of the boss of the first end cap 1 is connected to the inner side wall of the end of the seal housing 7, and the inner side wall of the boss of the first end cap 1 contacts the seal test block 11. A second mounting opening is provided at the center of the second end cap 4. After passing through the second mounting opening, the piston rod 5 is connected to the seal test block 11.

[0026] A plurality of liquid guide holes 14, a plurality of positioning holes 17, and a plurality of lead holes 18 are provided on the boss of the first end cap 1. The mounting end of the pressure sensor 3 is mounted in the positioning hole 17. A total of six pressure sensors 3 are provided on the outer edge of the seal test block 11 and are distributed at 120°. The test end of the pressure sensor 3 contacts the seal test block 11.

[0027] A first oil outlet 27, a second oil outlet 28, a first oil inlet 10, a second oil inlet 12, a liquid tank 16, a first leakage port 8, and a second leakage port 9 are provided on the seal housing 7.

[0028] Specifically, a first leakage port 8 is provided on the left side of the first oil outlet 27, and a second leakage port 9 is provided on the right side of the second oil outlet 28. Specifically, it is provided at the lower end of the pressure sensor 3. There is a gap between the pressure sensor 3 and the seal housing 7, and the hydraulic oil in the circumferential gap is discharged through the first leakage port 8.

[0029] The first liquid tank 16 and the second liquid tank 16 are annular grooves. The first liquid tank 16 and the second liquid tank 16 are provided on the inner side wall of the seal housing 7, and the first liquid tank 16 and the second liquid tank 16 are respectively in communication with the first oil outlet 27, the second oil outlet 28, the first oil inlet 10, and the second oil inlet 12.

[0030] A first volume chamber 13 and a second volume chamber 15 are respectively arranged at both ends of the seal test block 11. The first oil inlet 10 is in communication with the first volume chamber 13 through the liquid guide hole 14, and the first oil outlet 27 is in communication with the first volume chamber 13 through the liquid guide hole 14. The second oil inlet 12 is in communication with the second volume chamber 15 through the liquid guide hole 14, and the second oil outlet 28 is in communication with the second volume chamber 15 through the liquid guide hole 14.

[0031] The first leakage port and the second leakage port 9 are provided on the side wall of the seal housing 7 at the position where the pressure sensor 3 is located.

[0032] A first sealing groove 21 is provided at the connection between the second end cover 4 and the piston rod 5, and a first sealing ring 29 is arranged in the first sealing groove 21; a second sealing groove 22 is provided at the connection between the second end cover 4 and the first end cover 1, and a second sealing ring 30 is arranged in the second sealing groove 22; a third sealing groove 23 is provided at the connection between the first end cover 1 and the sealing housing, and a third sealing ring 31 is arranged in the third sealing groove 23; a fourth sealing groove 24 is provided at the contact between the outer side wall of the boss of the first end cover 1 and the inner side wall of the sealing housing, and a fourth sealing ring 32 is arranged in the fourth sealing groove 24; a fifth sealing groove 25 is provided at the contact between the inner side wall of the boss of the first end cover 1 and the sealing test block 11, and a fifth sealing ring 33 is arranged in the fifth sealing groove 25; a sixth sealing groove 26 is provided at the connection between the sealing test block 11 and the piston rod 5, and a test sealing ring 34 is arranged in the sixth sealing groove 26.

[0033] A first bolt hole 19 and a third bolt hole are provided on the first end cover 1. The first bolt 2 passes through the first bolt hole 19 and the fourth bolt hole of the sealing housing 7 to connect the first end cover 1 and the sealing housing 7; a second bolt hole 20 is provided on the second end cover 4. The second bolt 6 passes through the second bolt hole 20 and the third bolt hole to connect the second end cover 4 and the first end cover 1.

[0034] The power line of the pressure sensor 3 is connected to an external power supply through the lead hole 18.

[0035] Three positioning holes 17 are evenly distributed on the boss of the first end cover 1, and a pressure sensor 3 is installed in each positioning hole 17.

[0036] The opening positions of the liquid guide holes 14 are symmetrically distributed with respect to the plane where the first oil inlet 10, the second oil inlet 12, the first oil outlet 27, and the second oil outlet 28 are located.

[0037] The outer side wall of the boss of the first end cover 1 is pressed by the sealing housing 7 in the radial direction, and the two liquid guide holes 14 on the first end cover 1 are respectively on the same line as the first oil inlet 10 and the second oil inlet 12.

[0038] The second end cover 4 presses the first end cover 1 in the axial direction through a detachable second bolt 6.

[0039] The first end cover 1 is specifically as Figure 3As shown, six symmetrically distributed first bolt holes 19 and third bolt holes are provided on the surface. A detachable first bolt 2 is installed on the first bolt hole 19. After the first bolt 2 connects the first bolt hole 19 and the fourth bolt hole of the sealing housing 7, the first end cover 1 is tightly connected to the sealing housing 7 and presses the sealing housing 7 in the axial direction. Three lead holes 18 distributed at 120° are provided on the first end cover 1. The opening positions of the lead holes 18 are on the same straight line as the first bolt holes 19 of the first end cover 1. Positioning holes 17 for installing three pressure sensors 3 are also provided on the first end cover 1, and a first sealing groove 21, a third sealing groove 23, a fourth sealing groove 24, and a fifth sealing groove 25 are provided on the first end cover 1.

[0040] The second end cover 4 is specifically as Figure 4 shown. Six evenly distributed second bolt holes 20 are provided on the surface. After the second bolt 6 connects the second bolt hole 20 and the third bolt hole, the second end cover 4 is connected to the first end cover 1.

[0041] The seal test block 11 is specifically as Figure 5 shown. A sixth sealing groove 26 is provided in the seal test block 1111. The test sealing ring 34 is installed in the sixth sealing groove 26. The test sealing ring 34 is in the middle between the piston rod 5 and the seal test block 11. Among them, the seal friction block, the first end cover 1, and the piston rod 5 together form a first volume chamber 13 and a second volume chamber 15. The test sealing ring 34 makes the two volume chambers not communicate with each other, so that the test sealing ring 34 can be tested.

[0042] The test process of the present utility model is as follows: When the same pressure but different media with stable pressure are introduced into the two volume chambers, the piston rod 5 reciprocates in the device. The test sealing ring 34 is subjected to frictional force in a certain direction. The force is transmitted to the seal test block 11 through the test sealing ring 34. At this time, the pressure sensors 3 on both sides are subjected to pressure. The frictional force is determined by the two values of the two pressure sensors 3 on the same axis. The numerical changes of the two pressure sensors 3 should be consistent.

[0043] This device can be designed with different modules according to Figure 5 to be able to perform the test on the hole sealing ring.

[0044] When different pressure media are introduced into the first oil inlet 10 and the second oil inlet 12, the different pressure media enter the first volume chamber 13 and the second volume chamber 15 from the two oil inlets respectively. After the pressure media are stable, that is, the values of the pressure sensors 3 do not change significantly, the left and right inner walls of the seal test block 11 feel the pressure, and at the same time the piston rod 5 reciprocates. At this time, the values of the pressure sensors 3 at both ends change, and the changed value is the reciprocating one-way frictional force of the tested sealing ring one 34.

[0045] If it is selected to measure sealing rings of different sizes, the piston rod 5 can be first withdrawn, the second bolts 6 on both sides can be removed, the second end cover 4 can be taken off, the first bolt 2 on one side can be removed and then the first end cover 1 on one side can be taken off, and the pressure sensor 3 is removed together with the first end cover 1, and the seal test block 11 can be taken off. Replace and install the seal test block 11, the second end cover 4 and the piston rod 5 according to the size and model of the sealing ring to be measured.

[0046] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A modular test device for a multi-condition reciprocating seal ring, comprising a first end cover, a second end cover, a seal test block, a piston rod, a seal housing and a pressure sensor, characterized in that: The first end cover and the second end cover are respectively disposed at both ends of the sealing housing, the sealing test block is disposed inside the sealing housing, and the middle end of the piston rod contacts the inner side wall of the sealing test block; A first installation opening is provided at the center of the first end cover, the second end cover is arranged in the first installation opening, the outer side wall of the boss of the first end cover contacts the inner side wall of the end of the sealing housing, and the inner side wall of the boss of the first end cover contacts the sealing test block; a second installation opening is provided at the center of the second end cover, and the piston rod contacts the sealing test block after passing through the second installation opening; The boss of the first end cover is provided with a plurality of liquid guide holes, a plurality of positioning holes and a plurality of lead holes, the mounting end of the pressure sensor is mounted in the positioning hole, and the test end of the pressure sensor is in contact with the sealing test block; The sealed housing is provided with a first oil outlet, a second oil outlet, a first oil inlet, a second oil inlet, a first liquid groove, a second liquid groove, a first leakage port, and a second leakage port; the first liquid groove and the second liquid groove are annular grooves, the first liquid groove and the second liquid groove are provided on the inner side wall of the sealed housing, and the first liquid groove and the second liquid groove are respectively connected with the first oil outlet, the second oil outlet, the first oil inlet, and the second oil inlet; The two ends of the sealing test block are respectively provided with a first volume cavity and a second volume cavity, the first oil inlet is communicated with the first volume cavity through the liquid guide hole, and the first oil outlet is communicated with the first volume cavity through the liquid guide hole; the second oil inlet is communicated with the second volume cavity through the liquid guide hole, and the second oil outlet is communicated with the second volume cavity through the liquid guide hole; The first leakage port and the second leakage port are opened on the side wall of the sealing housing at corresponding positions of the pressure sensor.

2. The multi-condition reciprocating seal ring modular testing device according to claim 1, characterized in that: A first sealing groove is provided at the connection between the second end cover and the piston rod, and a first sealing ring is arranged in the first sealing groove; a second sealing groove is provided at the contact between the second end cover and the first end cover, and a second sealing ring is arranged in the second sealing groove; a third sealing groove is provided at the connection between the first end cover and the sealing shell, and a third sealing ring is arranged in the third sealing groove; a fourth sealing groove is provided at the contact between the outer wall of the boss of the first end cover and the inner wall of the sealing shell, and a fourth sealing ring is arranged in the fourth sealing groove; a fifth sealing groove is provided at the contact between the inner wall of the boss of the first end cover and the sealing test block, and a fifth sealing ring is arranged in the fifth sealing groove; a sixth sealing groove is provided at the connection between the sealing test block and the piston rod, and a test sealing ring is arranged in the sixth sealing groove.

3. The multi-condition reciprocating seal ring modular testing device according to claim 2, characterized in that: The first end cover is provided with a first bolt hole and a third bolt hole, and the first end cover is connected to the sealing shell after the first bolt passes through the first bolt hole and the fourth bolt hole of the sealing shell; the second end cover is provided with a second bolt hole, and the second end cover is connected to the first end cover after the second bolt passes through the second bolt hole and the third bolt hole.

4. The multi-condition reciprocating seal ring modular testing device according to claim 2, characterized in that: The power line of the pressure sensor is connected to an external power source through the lead hole.

5. The multi-condition reciprocating seal ring modular testing device according to claim 2, characterized in that: The multiple positioning holes are three positioning holes, and the three positioning holes are evenly distributed on the boss of the first end cover, and a pressure sensor is installed in each positioning hole.

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