Shaft sealing performance and wear performance detection device

Abstract

The utility model discloses a shaft sealing performance and wear performance detection device comprising a cylinder body, two ends of the cylinder body are respectively provided with an end cover, a test shaft is arranged in the cylinder body and the end covers in a penetrating manner, one end of the test shaft is connected with a connecting piece, one end of each end cover far away from the cylinder body is provided with a mounting ring groove, and a plurality of test sealing pieces are arranged in the mounting ring groove. The inner wall of the testing sealing piece is attached to the periphery of the testing shaft, a gland is installed at the end, away from the cylinder body, of the end cover, and an abutting ring is arranged on the inner side of the gland and abuts against the testing sealing piece. According to the utility model, the sealing performance and the wear performance of the shaft can be tested simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and more specifically, to a device for testing shaft sealing performance and wear performance. Background Technology

[0002] During operation, water lifting equipment requires seals to protect the shaft and prevent liquid leakage. Simultaneously, the shaft experiences wear due to friction with media particles during movement. To ensure the normal operation of the equipment, sealing and wear performance tests are necessary to obtain data for appropriate adjustments and settings. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for testing shaft sealing performance and wear resistance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a shaft sealing and wear performance testing device, including a cylinder body, with end caps installed at both ends of the cylinder body. A test shaft is inserted inside the cylinder body and end caps, and a connector is connected to one end of the test shaft. An installation ring groove is opened at the end of the end cap away from the cylinder body, and a plurality of test seals are installed in the installation ring groove. The inner wall of the test seals is fitted to the outer circumference of the test shaft. A pressure cap is installed at the end of the end cap away from the cylinder body, and a pressure ring is provided on the inner side of the pressure cap, which presses against the test seals.

[0006] Furthermore, a sealing sleeve is installed in the mounting ring groove, the test shaft passes through the sealing sleeve, a test ring groove is opened on the side of the mounting ring groove near the pressure ring, several test seals are installed in the test ring groove, and a guide pressure ring is provided between the pressure ring and the test seals.

[0007] Furthermore, the end cap is threaded with several connecting studs on the side away from the cylinder body. The other end of the connecting stud is threaded to a force sensor. The end of the force sensor away from the connecting stud is threaded with a connecting stud. The connecting stud passes through the pressure cap and is threaded with a lock nut on the part of the connecting stud that passes through the pressure cap.

[0008] Furthermore, a sealing groove is provided on the side of the sealing sleeve away from the pressure ring, and a sealing ring is installed in the sealing groove.

[0009] Furthermore, a leakage detector is installed at the contact point between the inner wall of the gland and the test shaft.

[0010] Furthermore, the connector has an insertion hole on the side near the test shaft, and the test shaft has an end head on the end near the connector, which is inserted into the insertion hole.

[0011] Furthermore, a fixing hole is provided on the outer periphery of the end, and a through hole corresponding to the fixing hole is provided on the test shaft.

[0012] Furthermore, a metal spiral wound gasket is provided at the mating surface of the cylinder block and the end cap.

[0013] Furthermore, a stirring ring is installed on the portion of the test shaft located within the cavity.

[0014] The beneficial effects of this invention are: it can simultaneously test the sealing performance of the seal and the wear of the shaft by the medium particles, thus improving the efficiency of the test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a shaft sealing and wear performance testing device in this embodiment;

[0016] Figure 2 This is a front view of the shaft sealing and wear performance testing device in this embodiment;

[0017] Figure 3 This is a cross-sectional view of the shaft sealing and wear performance testing device in this embodiment;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0020] Figure 6 This is a cross-sectional view of the shaft sealing and wear performance testing device in this embodiment.

[0021] Reference numerals: 1. Cylinder body; 2. End cap; 3. Test shaft; 4. Connecting piece; 5. Pressure cap; 6. Force sensor; 7. Cavity; 8. Connecting stud one; 9. Sealing ring; 10. Connecting stud two; 11. Locking nut; 12. Mounting ring groove; 13. Sealing sleeve; 14. Test ring groove; 15. Test seal; 16. Guide pressure ring; 17. Leakage detector; 18. Pressure ring; 19. Metal spiral wound gasket; 20. End; 21. Insertion hole; 22. Fixing hole; 23. Through hole; 24. Stirring ring; 25. Vent hole; 26. Pressure measuring hole; 27. Pressure supply hole; 28. Turbidity test hole; 29. ​​Sealing groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-6 As shown, a shaft sealing and wear performance testing device includes a cylinder body 1, with end caps 2 installed at both ends of the cylinder body 1. The cylinder body 1 is hollow, and a cavity 7 for containing medium particles and liquid is formed between the cylinder body 1 and the two end caps 2. The cylinder body 1 and the end caps 2 are connected by bolts, which facilitates disassembly to clean the turbidity in the cavity 7 and to check the wear condition of the test shaft 3.

[0024] It also includes a test shaft 3, which passes through the cylinder body 1 and the end cover 2. One end of the test shaft 3 is connected to a connector 4, which is connected to an external drive mechanism to drive the test shaft 3. The end of the end cover 2 away from the cylinder body 1 has a mounting ring groove 12, in which a sealing sleeve 13 is installed. Inside the sealing sleeve 13, there is a test ring groove 14, in which several test seals 15 are installed. The inner wall of the test seals 15 is in contact with the outer periphery of the test shaft 3, and the test seals 15 are arranged axially along the test shaft 3. A pressure cap 5 is installed at the end of the end cap 2 away from the cylinder body 1. A pressure ring 18 is connected to the side of the pressure cap 5 closest to the end cap 2. The pressure ring 18 is located in the mounting ring groove 12. A guide pressure ring 16 is provided between the pressure ring 18 and the mounting ring groove 12. The outermost test seal 15 contacts the guide pressure ring 16. The pressure ring 18 presses against the test seal 15 through the guide pressure ring 16. After the test seal 15 is pressed, it fits tightly against the test shaft 3. The sealing performance of the test seal 15 is tested when the test shaft 3 moves by driving the test shaft 3 to rotate.

[0025] At the same time, when the test shaft 3 rotates, the medium particles in the liquid will come into contact with the test shaft 3, thus testing the wear of the shaft by the medium particles.

[0026] A metal spiral wound gasket 19 is provided at the mating surface of the cylinder body 1 and the end cap 2 to prevent liquid from leaking from the cavity 7 between them. A sealing groove 29 is provided on the side of the sealing sleeve 13 away from the pressure ring 18, and a sealing ring 9 is installed in the sealing groove 29 to prevent liquid from leaking from the gap between the sealing sleeve 13 and the end cap 2. Effective sealing of each gap can avoid the impact of leakage on the sealing performance test of the test seal 15.

[0027] For compression seals, the sealing material, clamping force, and relative speed between moving and stationary parts are all variable factors affecting their sealing performance. One of the main testing objectives of this device is to detect the relationship between clamping force and sealing performance. Specifically, several connecting studs 8 are threaded onto the side of the end cap 2 away from the cylinder 1. The other end of the connecting studs 8 is threaded onto the force sensor 6. The end of the force sensor 6 away from the connecting studs 8 is threaded onto the connecting stud 10. The connecting stud 10 passes through the pressure cap 5, and the portion of the connecting stud 10 passing through the pressure cap 5 is threaded onto a locking nut 11. During the tightening of the locking nut 11, the pressure cap 5 is pressed towards the end cap 2. The pressure ring 18 on the pressure cap 5 presses against the test seal 15. After the test seal 15 is pressed, it fits tightly against the test shaft 3, preventing liquid leakage between the test seal 15 and the test shaft 3. When the gland 5 presses the test seal 15, the force sensor 6 can detect the corresponding pressure value, thereby detecting the sealing performance of the test seal 15 under different pressing forces.

[0028] A leakage detector 17 is installed at the contact point between the inner wall of the pressure cap 5 and the test shaft 3. The leakage detector 17 is located outside the pressure ring 18, and the sealing performance is judged by the leakage detector 17.

[0029] The connector 4 has an insertion hole 21 on the side near the test shaft 3, and the test shaft 3 has an end head 20 on the end near the connector 4. The end head 20 is inserted into the insertion hole 21. The end head 20 has a fixing hole 22 on its outer periphery, and the test shaft 3 has a through hole 23 corresponding to the fixing hole 22. A fixing pin can be inserted into the through hole 23 and the fixing hole 22 to fix the end head 20 and the test shaft 3 together.

[0030] The cylinder body 1 has an exhaust port 25, a pressure measuring port 26, a pressure supply port 27, and a turbidity test port 28 on its outer periphery. The exhaust port 25 is located at the upper part of the cylinder body 1 and is used to discharge gas from the cylinder body 1 and to add solid particles of different materials and diameters into the cylinder body 1 to test the wear of the test shaft 3 and the sealing performance of the sealing sleeve 13. During the test, the exhaust port 25 is in a sealed state.

[0031] There are two pressure measuring holes 26, which are symmetrically arranged. Pressure sensors are connected to the pressure measuring holes 26 to read the liquid pressure inside the cylinder 1.

[0032] The pressure supply port 27 and the turbidity test port 28 are located on the left and right sides of the cylinder 1, respectively. A turbidity sensor is connected to the turbidity test port 28 to detect the turbidity of the liquid inside the cylinder 1.

[0033] A stirring ring 24 is installed on the part of the test shaft 3 located inside the cavity 7. When the test shaft 3 moves, it drives the stirring ring 24 to move to stir the liquid and prevent solid particles from settling to the bottom and affecting the test results.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for detecting the sealing property and wear performance of a shaft, characterized by, The utility model provides a test device for testing the sealing performance of the test seal (15), which comprises a cylinder (1), end covers (2) are installed at both ends of the cylinder (1), a test shaft (3) is arranged in the cylinder (1) and the end cover (2), one end of the test shaft (3) is connected with a connecting piece (4), an installation ring groove (12) is formed in the end cover (2) away from the cylinder (1), a plurality of test seals (15) are installed in the installation ring groove (12), the inner wall of the test seal (15) is arranged in close contact with the outer periphery of the test shaft (3), a gland (5) is installed on the end cover (2) away from the cylinder (1), a pressing ring (18) is arranged on the inner side of the gland (5), and the pressing ring (18) is arranged in close contact with the test seal (15).

2. The device for detecting the sealing and wear performance of a shaft according to claim 1, characterized in that, A sealing sleeve (13) is installed in the installation ring groove (12), the test shaft (3) passes through the sealing sleeve (13), a test ring groove (14) is formed in the side of the installation ring groove (12) close to the pressing ring (18), the plurality of test seals (15) are installed in the test ring groove (14), and a guide pressing ring (16) is arranged between the pressing ring (18) and the test seal (15).

3. The device for detecting the sealing and wear performance of a shaft according to claim 1 or 2, characterized in that, A plurality of connecting studs one (8) are threadedly connected to the side of the end cover (2) away from the cylinder (1), the other end of the connecting stud one (8) is threadedly connected to a force sensor (6), the end of the force sensor (6) away from the connecting stud one (8) is threadedly connected with a connecting stud two (10), the connecting stud two (10) passes through the gland (5), and the part of the connecting stud two (10) passing through the gland (5) is threadedly connected with a locking nut (11).

4. The device for detecting the sealing and wear performance of a shaft according to claim 2, characterized in that, A sealing groove (29) is formed in the side of the sealing sleeve (13) away from the pressing ring (18), and a sealing ring (9) is installed at the sealing groove (29).

5. The device for detecting the sealing and wear performance of a shaft according to claim 1 or 2, characterized in that, A liquid leakage detector (17) is arranged at the contact position between the inner wall of the gland (5) and the test shaft (3).

6. The device for detecting the sealing and wear performance of a shaft according to claim 1, wherein An insertion hole (21) is formed in the side of the connecting piece (4) close to the test shaft (3), an end head (20) is arranged at the end of the test shaft (3) close to the connecting piece (4), and the end head (20) is arranged in the insertion hole (21).

7. The device for detecting the sealing and wear performance of a shaft according to claim 6, characterized in that, A fixing hole (22) is formed in the outer periphery of the end head (20), and a through hole (23) corresponding to the fixing hole (22) is arranged on the test shaft (3).

8. The device for detecting the sealing and wear performance of a shaft according to claim 1, wherein, A metal winding gasket (19) is arranged at the joint surface of the cylinder (1) and the end cover (2).

9. The device for detecting the sealing and wear performance of a shaft according to claim 1, characterized in that, A stirring ring (24) is installed on the part of the test shaft (3) located in the cavity (7).

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