A multi-channel mud-resistant water seal assembly

Abstract

The present invention provides a multi-channel mud-proof water oil seal assembly, which includes a stator oil seal, a shaft sleeve and an external mud-proof water component that are sleeved together in a ring shape. The shaft sleeve includes an outer shaft sleeve, a shaft sleeve side wall and an inner shaft sleeve that are integrally arranged. A clamping groove is formed in the inner shaft sleeve, and the clamping groove faces the outer shaft sleeve. A nylon retaining ring is clamped in the clamping groove. The stator oil seal includes a sealing support portion, an oil seal side wall and an oil seal lip that are integrally arranged. An internal mud-proof water component is connected to the sealing member support wall. The internal mud-proof water component includes a rubber sealing ring, a main sealing spring ring and a secondary sealing spring ring. The rubber sealing ring includes an intermediate clamping groove, a main sealing lip and a secondary sealing lip. The external mud-proof water component includes an outer shaft sleeve mud-proof water wing and an inner shaft sleeve mud-proof water wing. The nylon ring piece reduces the running-in time and running torque. The multi-layer labyrinth design improves the sliding property and reduces the rotational friction, ensuring excellent sealing performance. The design of multiple-layer outer diameters improves the adaptability.

Description

Technical Field

[0001] The invention relates to the field of mechanical oil seals, in particular to a multi-channel mud and water blocking oil seal assembly. Background Art

[0002] The mud and water-blocking oil seal is a sealing structure, and its main purpose is to be installed on machinery that needs to operate in a muddy and water environment. It is used to seal the lubricating oil inside the machinery to prevent the lubricating oil from leaking out, and at the same time prevent the mud and water outside the machinery from entering the inside of the machinery, and prevent the mud and water from damaging the rotating parts. Compared with ordinary sealing rings, the mud and water-blocking oil seal is more important for blocking mud and water, because once the mud and water-blocking effect fails, the mud and water enter the rotating parts, which will cause the lubricating oil to mix with the mud and water, and the lubrication effect will fail. At the same time, the mud and water will cause the rotating parts to wear and rust, and the life of the equipment will be greatly reduced, leading to damage. The mud and water-blocking oil seal is in the shape of a circular rotating body. Usually, the inside of the mud and water-blocking oil seal is lubricating oil, and the outside of the mud and water-blocking oil seal faces mud and water. The mud and water-blocking oil seal structure in the prior art is similar to the lubricating oil sealing structure of the rotating shaft lip seal ring specified in standards such as GB / T9877-2008, and is specifically a structure formed by the interference fit between the sealing lip and the sealing surface.

[0003] The existing mud and water blocking oil seal has insufficient anti-mud and water effect, mainly because the seal is prone to failure in the face of axial and radial deviations of rotating parts. Although the stator oil seal and the shaft sleeve in the existing mud and water blocking oil seal have interference fit, the interference fit is prone to failure in the face of axial and radial deviations, resulting in mud and water entering. In particular, the existing structure is more inclined to prevent the mud and water from flowing in radially, and the axial mud and water blocking sealing effect is poor. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional technology and provide a multi-channel mud and water blocking oil seal assembly with good sealing effect for radial and axial deviations of a rotating structure.

[0005] The purpose of the present invention is achieved through the following technical measures:

[0006] A multi-pass mud and water blocking oil seal assembly, comprising a stator oil seal, a shaft sleeve and an outer mud and water blocking component which are annularly sleeved together, characterized in that:

[0007] The shaft sleeve comprises an outer shaft sleeve, a shaft sleeve side wall and an inner shaft sleeve which are integrally arranged, and a shaft sleeve sealing groove is formed between the outer shaft sleeve, the shaft sleeve side wall and the inner shaft sleeve;

[0008] The stator oil seal includes a sealing support portion, an oil seal side wall, and an oil seal lip that are integrally provided. The sealing support portion of the stator oil seal is disposed inside the shaft sleeve sealing groove. The sealing support portion includes an outer support wall, an inner support side wall, an intermediate support wall, and a seal support wall. A snap ring groove is formed between the outer support wall, the inner support side wall, and the intermediate support wall. The seal support wall is connected with an internal resistance mud and water component;

[0009] The external resistance mud and water component includes an outer shaft sleeve resistance mud and water wing and an inner shaft sleeve resistance mud and water wing. The outer shaft sleeve resistance mud and water wing is sleeved with the outer shaft sleeve. The outer shaft sleeve resistance mud and water wing is provided with an annular protruding outer rubber wing on the outer side of the outer shaft sleeve, and the outer shaft sleeve resistance mud and water wing is provided with an annular protruding inner rubber wing on the inner side of the outer shaft sleeve. The inner rubber wing is arranged in interference fit with the outer support wall. A connecting ring is connected between the outer shaft sleeve resistance mud and water wing and the inner shaft sleeve resistance mud and water wing.

[0010] As an improvement: The inner shaft sleeve is provided with a clamping groove facing the outer shaft sleeve. A nylon snap ring is clamped in the clamping groove. The nylon snap ring has an inner ring wall and an outer ring wall that are vertically arranged. The outer ring wall of the nylon snap ring is clamped in the clamping groove of the inner shaft sleeve, and the inner ring wall of the nylon snap ring is inserted into the snap ring groove.

[0011] As an improvement: The internal resistance mud and water component includes a rubber sealing ring, a main sealing spring ring, and a secondary sealing spring ring. The main sealing spring ring and the secondary sealing spring ring tighten the rubber sealing ring. The rubber sealing ring is arranged between the shaft sleeve and the stator oil seal.

[0012] As an improvement: The rubber sealing ring includes an intermediate clamping groove, a main sealing lip, and a secondary sealing lip. The main sealing lip is arranged between the side wall of the shaft sleeve and the inner shaft sleeve, and the main sealing lip is tightened towards the center by the main sealing spring ring. The secondary sealing lip is arranged between the outer ring wall of the nylon snap ring and the inner shaft sleeve, and the secondary sealing lip is tightened towards the center by the secondary sealing spring ring. The seal support wall is inserted into the intermediate clamping groove of the rubber sealing ring, and the seal support wall is in interference fit with the rubber sealing ring.

[0013] As an improvement: An intermediate buffer groove is arranged between the rubber sealing ring and the inner shaft sleeve. A main lip buffer groove is arranged between the main sealing lip and the nylon snap ring. A secondary lip buffer groove is arranged between the secondary sealing lip and the side wall of the shaft sleeve.

[0014] As an improvement: A nylon ring piece is connected between the outer shaft sleeve and the oil seal side wall. The nylon ring piece includes a nylon ring body and a nylon ring inner lip. The outer shaft sleeve resistance mud and water wing and the inner shaft sleeve resistance mud and water wing extend towards the distal end of the outer shaft sleeve and form a ring groove. The nylon ring inner lip faces the outer shaft sleeve, and the nylon ring inner lip is inserted into the ring groove.

[0015] As an improvement: The nylon ring piece includes a nylon ring outer lip, and the protruding direction of the nylon ring outer lip is the same as that of the outer rubber wing.

[0016] As an improvement: Two groups of rubber sealing ribs are arranged on the side wall of the inner shaft sleeve mud-proof water wing away from the inner shaft sleeve, and the two groups of rubber sealing ribs are integrally arranged with the inner shaft sleeve mud-proof water wing.

[0017] As an improvement: The protruding directions of the outer rubber wing on the outside of the outer shaft sleeve mud-proof water wing and the inner rubber wing on the inside of the outer shaft sleeve mud-proof water wing are opposite. The protruding direction of the outer rubber wing faces away from the nylon ring piece, and the protruding direction of the inner rubber wing faces towards the nylon ring piece.

[0018] Due to the adoption of the above technical solutions, compared with the prior art, the advantages of the present invention are:

[0019] The sealing performance is ensured by the arrangement of multiple groups of rubber sealing ribs. The shaft sleeve is made of tool steel with a certain thickness. The firm integral structure has the advantages of high structural strength and toughness on the side, comprehensively protecting the internal structure during installation and preventing damage to the internal mud-proof water structure. The stator oil seal, shaft sleeve, outer mud-proof water component and inner mud-proof water component jointly constitute a multi-layer labyrinth design. The professionally designed nylon ring piece reduces the running-in time and operating torque. The multi-layer labyrinth design has the advantages of improving the sliding property and reducing the rotational friction. The outer shaft sleeve mud-proof water wing, inner shaft sleeve mud-proof water wing, rubber sealing ring and rubber sealing ribs are all made of hydrogenated nitrile rubber, and their structures ensure excellent sealing performance. The design of multiple levels of outer diameters improves the adaptability. Brief Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 is a cross-sectional structural schematic diagram of the present invention.

[0022] Figure 3 is Figure 2 a schematic diagram of the connection structure between the middle shaft sleeve and the outer mud-proof water component.

[0023] Figure 4 is Figure 3 a three-dimensional structural schematic diagram of the middle shaft sleeve.

[0024] Figure 5 is Figure 3 a three-dimensional structural schematic diagram of the outer mud-proof water component.

[0025] Figure 6 is Figure 2 a schematic diagram of the connection structure between the stator oil seal and the inner mud-proof water component.

[0026] In the figure: 1. Bush; 11. Outer bush; 12. Inner bush; 13. Bush side wall; 14. Bush seal groove; 15. Card slot; 16. Nylon retaining ring; 2. Stator oil seal; 21. Seal support part; 211. Outer support wall; 212. Inner support side wall; 213. Intermediate support wall; 214. Seal support wall; 215. Retaining ring groove; 22. Oil seal side wall; 23. Oil seal lip; 3. Outer mud and water resistance component; 31. Outer bush mud and water resistance wing; 32. Inner bush mud and water resistance wing; 33. Inner rubber wing; 34. Outer rubber wing; 35. Ring groove; 36. Rubber seal rib; 37. Connecting ring; 4. Inner mud and water resistance component; 41. Main seal spring ring; 42. Sub-seal spring ring; 43. Rubber seal ring; 44. Intermediate clamping groove; 45. Main seal lip; 46. Sub-seal lip; 47. Main lip buffer groove; 48. Sub-lip buffer groove; 49. Intermediate buffer groove; 5. Nylon ring piece; 51. Nylon ring body; 52. Nylon ring inner lip; 53. Nylon ring outer lip. Detailed implementation mode

[0027] Example: As shown in the appendix Figures 1 to 6 As shown in the figure, a multi-channel mud and water resistance oil seal assembly includes a stator oil seal 2, a bush 1 and an outer mud and water resistance component 3 that are sleeved together in a ring shape. The bush 1 includes an outer bush 11, a bush side wall 13 and an inner bush 12 that are integrally arranged. An axial seal groove 14 is formed between the outer bush 11, the bush side wall 13 and the inner bush 12 of the bush 1. The stator oil seal 2 includes a seal support part 21, an oil seal side wall 22 and an oil seal lip 23 that are integrally arranged. The seal support part 21 of the stator oil seal 2 is arranged inside the bush seal groove 14. The seal support part 21 includes an outer support wall 211, an inner support side wall 212, an intermediate support wall 213 and a seal support wall 214. A retaining ring groove 215 is formed between the outer support wall 211, the inner support side wall 212 and the intermediate support wall 213. The seal support wall 214 is connected with an inner mud and water resistance component 4. The outer mud and water resistance component 3 includes an outer bush mud and water resistance wing 31 and an inner bush mud and water resistance wing 32. The outer bush mud and water resistance wing 31 is sleeved on the outer bush 11. The outer bush mud and water resistance wing 31 is provided with an annular protruding outer rubber wing 34 on the outside of the outer bush 11. The outer bush mud and water resistance wing 31 is provided with an annular protruding inner rubber wing 33 on the inside of the outer bush 11. The inner rubber wing 33 is arranged in an interference fit with the outer support wall 211. A connecting ring 37 is connected between the outer bush mud and water resistance wing 31 and the inner bush mud and water resistance wing 32.

[0028] According to Figure 2 and 4As shown, a clamping groove 15 is formed in the inner shaft sleeve 12. The clamping groove 15 faces the outer shaft sleeve 11. A nylon retaining ring 16 is clamped in the clamping groove 15. The nylon retaining ring 16 has an inner ring wall and an outer ring wall that are vertically arranged. The outer ring wall of the nylon retaining ring 16 is clamped in the clamping groove 15 of the inner shaft sleeve 12, and the inner ring wall of the nylon retaining ring 16 is inserted into the retaining ring groove 215. The nylon retaining ring 16 can be used to limit the stator oil seal 2. By providing the nylon retaining ring 16, a labyrinth structure can be formed inside the oil seal assembly. With the labyrinth structure of the complex structure, it has the advantages of improving the sliding property and reducing the rotational friction, ensuring excellent sealing performance, and the design of multiple-layer outer diameters improves the adaptability.

[0029] According to Figure 2 and 6 As shown, the internal resistance muddy water assembly 4 includes a rubber sealing ring 43, a main sealing spring ring 41, and a secondary sealing spring ring 42. The main sealing spring ring 41 and the secondary sealing spring ring 42 tighten the rubber sealing ring 43. The rubber sealing ring 43 is arranged between the shaft sleeve 1 and the stator oil seal 2. The internal resistance muddy water assembly 4 mainly functions to provide the sealing performance and the ability to block muddy water inside the oil seal assembly. The main sealing spring ring 41 and the secondary sealing spring ring 42 can tighten the rubber sealing ring 43 to achieve sealing.

[0030] Through Figure 2 、 3 、4 and 6 as shown, the rubber sealing ring 43 includes an intermediate clamping groove 44, a main sealing lip 45, and a secondary sealing lip 46. The main sealing lip 45 is arranged between the side wall 13 of the shaft sleeve and the inner shaft sleeve 12. The main sealing lip 45 is tightened towards the center by the main sealing spring ring 41. The secondary sealing lip 46 is arranged between the outer ring wall of the nylon retaining ring 16 and the inner shaft sleeve 12. The secondary sealing lip 46 is tightened towards the center by the secondary sealing spring ring 42. The sealing member support wall 214 is inserted into the intermediate clamping groove 44 of the rubber sealing ring 43, and the sealing member support wall 214 and the rubber sealing ring 43 are in interference fit.

[0031] Through Figure 2 、 3 、4 and 6 as shown, an intermediate buffer groove 49 is provided between the rubber sealing ring 43 and the inner shaft sleeve 12. A main lip buffer groove 47 is provided between the main sealing lip 45 and the nylon retaining ring 16. A secondary lip buffer groove 48 is provided between the secondary sealing lip 46 and the side wall 13 of the shaft sleeve. The intermediate buffer groove 49 can apply a force to the sealing member support wall 214 to achieve pressing and tightening of the sealing member support wall 214. The main lip buffer groove 47 can apply a force to the nylon retaining ring 16 to achieve the sealing of the gap between the nylon retaining ring 16 and the main sealing lip 45. Through the secondary lip buffer groove 48, a force can be applied to the side wall 13 of the shaft sleeve to achieve the sealing of the gap between the side wall 13 of the shaft sleeve and the secondary lip buffer groove 48.

[0032] As shown in FIGS. 2 and 3, a nylon ring piece 5 is connected between the outer shaft sleeve 11 and the side wall 22 of the oil seal. The nylon ring piece 5 includes a nylon ring body 51 and a nylon ring inner lip 52. The outer shaft sleeve mud blocking wing 31 and the inner shaft sleeve mud blocking wing 32 extend towards the distal end of the outer shaft sleeve 11 and form a ring groove 35. The nylon ring inner lip 52 faces the outer shaft sleeve 11, and the nylon ring inner lip 52 is inserted into the ring groove 35. The nylon ring piece 5 mainly functions to fix the outer shaft sleeve mud blocking wing 31. By connecting the nylon ring inner lip 52 with the ring groove 35, the gap between the nylon ring inner lip 52 and the ring groove 35 can be sealed, thereby realizing the design of multiple-layer outer diameters and improving the adaptability.

[0033] As shown in FIGS. 2 and 3, the nylon ring piece 5 includes a nylon ring outer lip 53, and the protruding direction of the nylon ring outer lip 53 is the same as the protruding direction of the outer rubber wing 34. The nylon ring piece 5 functions for sealed installation, and the nylon ring outer lip 53 mainly functions to seal and press tightly against the side wall 22 of the oil seal.

[0034] As shown in FIGS. 2, 3 and 5, two groups of rubber sealing ribs 36 are provided on the side wall of the inner shaft sleeve mud blocking wing 32 away from the inner shaft sleeve 12, and the two groups of rubber sealing ribs 36 are integrally provided with the inner shaft sleeve mud blocking wing 32. By providing the rubber sealing ribs 36, the components installed inside the inner shaft sleeve 12 can be sealed. The two groups of rubber sealing ribs 36 can achieve a better sealing effect. Both groups of rubber sealing ribs 36 are provided with annular grooves, which can increase the friction force during fitting and can also be used for sealing. The rubber sealing ribs 36 are made of hydrogenated nitrile rubber as raw material.

[0035] As shown in FIGS. 2, 3, 5 and 6, the protruding direction of the outer rubber wing 34 outside the outer shaft sleeve mud blocking wing 31 is opposite to the protruding direction of the inner rubber wing 33 inside the outer shaft sleeve mud blocking wing 31. The protruding direction of the outer rubber wing 34 is towards the direction away from the nylon ring piece 5, and the protruding direction of the inner rubber wing 33 is towards the direction close to the nylon ring piece 5. The protruding direction of the outer rubber wing 34 is beneficial to effectively prevent external mud and water from entering the inside of the oil seal assembly during installation. The protruding direction of the outer rubber wing 34 can directly block the mud and water. The protruding direction of the inner rubber wing 33 is to prevent mud and water from entering the inside of the oil seal assembly through the gap between the outer shaft sleeve 11 and the outer support wall 211. The protruding direction of the inner rubber wing 33 can directly block the mud and water. Moreover, the inner rubber wing 33 is provided with an interference fit with the outer support wall 211, which can also prevent mud and water from entering the inside of the oil seal assembly through the gap between the inner rubber wing 33 and the outer support wall 211, ensuring excellent sealing performance.

Claims

1. A multi-channel mud-blocking water oil seal assembly, comprising a stator oil seal (2), a shaft sleeve (1) and an external mud-blocking water assembly (3) sleeved together in a ring shape, characterized in that: The shaft sleeve (1) includes an outer shaft sleeve (11), a shaft sleeve side wall (13) and an inner shaft sleeve (12) integrally arranged. An axial seal groove (14) is formed between the outer shaft sleeve (11), the shaft sleeve side wall (13) and the inner shaft sleeve (12) of the shaft sleeve (1); The stator oil seal (2) includes a sealing support portion (21), an oil seal side wall (22) and an oil seal lip (23) integrally arranged. The sealing support portion (21) of the stator oil seal (2) is arranged inside the shaft sleeve seal groove (14). The sealing support portion (21) includes an outer support wall (211), an inner support side wall (212), an intermediate support wall (213) and a seal support wall (214). A snap ring groove (215) is formed between the outer support wall (211), the inner support side wall (212) and the intermediate support wall (213). An internal mud-blocking water assembly (4) is connected to the seal support wall (214); The external mud-blocking water assembly (3) includes an outer shaft sleeve mud-blocking water wing (31) and an inner shaft sleeve mud-blocking water wing (32). The outer shaft sleeve mud-blocking water wing (31) is sleeved on the outer shaft sleeve (11). The outer shaft sleeve mud-blocking water wing (31) is provided with an annular protruding outer rubber wing (34) on the outer side of the outer shaft sleeve (11), and the outer shaft sleeve mud-blocking water wing (31) is provided with an annular protruding inner rubber wing (33) on the inner side of the outer shaft sleeve (11). The inner rubber wing (33) is arranged in interference fit with the outer support wall (211). A connecting ring (37) is connected between the outer shaft sleeve mud-blocking water wing (31) and the inner shaft sleeve mud-blocking water wing (32). A clamping groove (15) is formed in the inner shaft sleeve (12). The clamping groove (15) faces the outer shaft sleeve (11). A nylon snap ring (16) is clamped in the clamping groove (15). The nylon snap ring (16) has an inner ring wall and an outer ring wall arranged vertically. The outer ring wall of the nylon snap ring (16) is clamped in the clamping groove (15) of the inner shaft sleeve (12), and the inner ring wall of the nylon snap ring (16) is inserted into the snap ring groove (215). A nylon ring piece (5) is connected between the outer shaft sleeve (11) and the oil seal side wall (22). The nylon ring piece (5) includes a nylon ring body (51) and a nylon ring inner lip (52). The outer shaft sleeve mud-blocking water wing (31) and the inner shaft sleeve mud-blocking water wing (32) extend towards the distal end of the outer shaft sleeve (11) and form an annular groove (35). The nylon ring inner lip (52) faces the outer shaft sleeve (11). The nylon ring inner lip (52) is inserted into the annular groove (35).

2. The multi-channel mud-blocking water oil seal assembly according to claim 1, wherein: The internal mud-blocking water assembly (4) includes a rubber sealing ring (43), a main sealing spring ring (41) and a secondary sealing spring ring (42). The main sealing spring ring (41) and the secondary sealing spring ring (42) tighten the rubber sealing ring (43). The rubber sealing ring (43) is arranged between the shaft sleeve (1) and the stator oil seal (2).

3. The multi-channel mud-blocking water oil seal assembly according to claim 2, characterized in that: The rubber sealing ring (43) includes an intermediate clamping groove (44), a main sealing lip (45) and a secondary sealing lip (46). The main sealing lip (45) is disposed between the side wall of the bushing (13) and the inner bushing (12), and the main sealing lip (45) is tightened towards the center by a main sealing spring ring (41). The secondary sealing lip (46) is disposed between the outer wall of the nylon retaining ring (16) and the inner bushing (12), and the secondary sealing lip (46) is tightened towards the center by a secondary sealing spring ring (42). The sealing member support wall (214) is inserted into the intermediate clamping groove (44) of the rubber sealing ring (43), and the sealing member support wall (214) is in interference fit with the rubber sealing ring (43).

4. A multi-channel anti-seepage oil seal assembly according to claim 3, characterized in that: An intermediate buffer groove (49) is provided between the rubber sealing ring (43) and the inner bushing (12), a main lip buffer groove (47) is provided between the main sealing lip (45) and the nylon retaining ring (16), and a secondary lip buffer groove (48) is provided between the secondary sealing lip (46) and the side wall of the bushing (13).

5. The multi-channel anti-seepage water oil seal assembly according to claim 1, characterized in that: The nylon ring piece (5) includes a nylon ring outer lip (53), and the protruding direction of the nylon ring outer lip (53) is the same as that of the outer rubber wing (34).

6. The multi-channel mud-blocking water oil seal assembly according to claim 1, characterized in that: Two groups of rubber sealing ribs (36) are provided on the side wall of the inner bushing mud-proof wing (32) away from the inner bushing (12), and the two groups of rubber sealing ribs (36) are integrally provided with the inner bushing mud-proof wing (32).

7. A multi-channel mud-blocking water oil seal assembly according to claim 1, characterized in that: The protruding directions of the outer rubber wing (34) outside the outer bushing mud-proof wing (31) and the inner rubber wing (33) inside the outer bushing mud-proof wing (31) are opposite. The protruding direction of the outer rubber wing (34) is towards the direction away from the nylon ring piece (5), and the protruding direction of the inner rubber wing (33) is towards the direction close to the nylon ring piece (5).

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