Rotary shaft sealing ring of anti-abrasion shaft

Abstract

The rotating shaft sealing ring comprises a fixed ring, a movable ring, a first fluorine rubber sleeve, a second fluorine rubber sleeve and a third fluorine rubber sleeve, the fixed ring is composed of a first cylinder body, a first transition ring, a second cylinder body and a limiting ring which are coaxial and sequentially connected, and the first cylinder body, the first transition ring, the second cylinder body and the limiting ring are of an integrated structure. The outer diameter of the second cylinder is smaller than the inner diameter of the first cylinder, the second cylinder is located outside an area defined by the first cylinder, the first cylinder is sleeved with a first fluorine rubber sleeve, and the first fluorine rubber sleeve and the first cylinder are fixed together through vulcanization. According to the utility model, the second fluorine rubber sleeve, the movable ring and the third fluorine rubber sleeve are matched, so that the rotating shaft and the movable ring move together when the rotating shaft rotates, the rotating shaft and the third fluorine rubber sleeve are relatively static, and the rotating shaft cannot be worn by the third fluorine rubber sleeve.

Description

[Technical field]

[0001] The utility model relates to the technical field of machinery, in particular to the technical field of rotary shaft sealing rings. [Background technology]

[0002] The rotary shaft seal ring, also called the rotary shaft lip seal ring, is installed between the rotary shaft and the stationary part. It is used to seal the leakage of lubricating oil and prevent external dust and debris from invading the dynamic sealing element of the equipment. It is generally used to seal rods, shafts, pins, rotary joints, etc. with rotating or swinging motions. Rotary hydraulic rotation exists in various industrial fields such as engineering machinery, construction machinery and automotive equipment. It is a two-way rotating seal ring that can withstand pressure from both sides or alternating pressure. The existing rotary shaft seal ring will be provided with a seal ring with a C-shaped lip, which will be sleeved on the rotary shaft to play a sealing role. However, when the rotary shaft rotates, the seal ring will continuously rub against the rotary shaft. After long-term use, dents will be worn on the rotary shaft. The dents will not only reduce the strength of the rotary shaft, but also when the dents are deep to a certain extent, even if a new seal ring is replaced, the initial sealing effect cannot be achieved, and leakage is prone to occur. [Contents of the utility model]

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a rotary shaft sealing ring for an anti-wear shaft, which can prevent the rotary shaft from being easily worn.

[0004] To achieve the above-mentioned purpose, the utility model proposes a rotating shaft sealing ring for an anti-wear shaft, comprising a fixed ring, a movable ring, a first fluororubber sleeve, a second fluororubber sleeve, and a third fluororubber sleeve. The fixed ring is composed of a first cylinder, a first transition ring, a second cylinder, and a limit ring that are coaxial and sequentially connected. The first cylinder, the first transition ring, the second cylinder, and the limit ring are an integrated structure. The outer diameter of the second cylinder is smaller than the inner diameter of the first cylinder. The second cylinder is located outside the area surrounded by the first cylinder. A first fluororubber sleeve is sleeved on the outside of the first cylinder. The first fluororubber sleeve and the first cylinder are fixed together by vulcanization. An annular insertion groove is formed between the first fluororubber sleeve and the second cylinder. The movable ring is coaxial with the fixed ring. The movable ring is composed of a third cylinder, a second transition ring, and a fourth cylinder that are coaxial and sequentially connected. The third cylinder is inserted into the annular insertion groove, the fourth cylinder passes through the limiting ring, the movable ring is covered with a second fluororubber sleeve on the outside, the second fluororubber sleeve is fixed to the movable ring by vulcanization, the second fluororubber sleeve is tightly combined with the outer wall of the third cylinder, the end of the second transition ring away from the fixed ring, and the inner wall of the fourth cylinder, the outer diameter of the second fluororubber sleeve is smaller than the outer diameter of the first fluororubber sleeve, the second fluororubber sleeve is tightly fitted with the inner wall of the annular insertion groove formed by the first fluororubber sleeve, a third fluororubber sleeve is fixed near the end of the limiting ring close to the first cylinder, the third fluororubber sleeve is fixed to the limiting ring by vulcanization, an annular spring is covered on the outside of the third fluororubber sleeve, the annular spring is in a tensioned state, the inner side of the third fluororubber sleeve is provided with a C-shaped lip, and the inner side of the third fluororubber sleeve is tightly against the outer wall of the fourth cylinder.

[0005] Preferably, a protective ring is installed on the fourth cylinder, and the protective ring consists of a coaxial and connected connecting ring and a fifth cylinder. The connecting ring is installed on the outer wall of the fourth cylinder, and the fifth cylinder is located at the connecting ring close to the limiting ring end.

[0006] Preferably, an annular mounting groove is provided on the outer wall of the fourth cylinder, and the inner side of the connecting ring is embedded in the mounting groove.

[0007] Preferably, an anti-slip groove is provided on the outer wall of the third fluororubber sleeve, and the annular spring is partially embedded in the anti-slip groove.

[0008] Preferably, the movable ring is fixed with a fourth fluororubber sleeve by vulcanization, the first fluororubber sleeve is tightly combined with the inner wall of the third cylinder and the end of the second transition ring close to the fixed ring, and the third fluororubber sleeve is provided with several compression rings on the side close to the limiting ring, and the compression rings are in close contact with the limiting ring.

[0009] Preferably, a plurality of sealing convex rings are provided on the outer wall of the first fluororubber sleeve and the inner wall of the second fluororubber sleeve located in the inner area of ​​the fourth cylinder.

[0010] Beneficial effects of the utility model: the utility model matches the second fluororubber sleeve, the movable ring and the third fluororubber sleeve so that when the rotating shaft rotates, the rotating shaft and the movable ring move together, the rotating shaft and the third fluororubber sleeve are relatively stationary, and the rotating shaft will not be worn by the third fluororubber sleeve.

[0011] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0012] Figure 1 It is a front view of the rotary shaft sealing ring of the wear-resistant shaft of the utility model.

[0013] In the figure: 1-fixed ring, 2-movable ring, 3-first fluororubber sleeve, 4-second fluororubber sleeve, 5-third fluororubber sleeve, 6-protective ring, 7-fourth fluororubber sleeve, 11-first cylinder, 12-first transition ring, 13-second cylinder, 14-limiting ring, 21-third cylinder, 22-second transition ring, 23-fourth cylinder, 30-annular insertion groove, 40-sealing convex ring, 50-annular spring, 61-connecting ring, 62-fifth cylinder, 70-compression ring. [Specific implementation method]

[0014] See also Figure 1The utility model of the rotary shaft sealing ring of the wear-resistant shaft comprises a fixed ring 1, a movable ring 2, a first fluororubber sleeve 3, a second fluororubber sleeve 4, and a third fluororubber sleeve 5. The fixed ring 1 is composed of a first cylinder 11, a first transition ring 12, a second cylinder 13, and a limit ring 14 which are coaxial and sequentially connected. The first cylinder 11, the first transition ring 12, the second cylinder 13, and the limit ring 14 are an integrated structure. The outer diameter of the second cylinder 13 is smaller than the inner diameter of the first cylinder 11. The second cylinder 13 is located outside the area surrounded by the first cylinder 11. A first fluororubber sleeve 3 is sleeved on the outside of the first cylinder 11. The first fluororubber sleeve 3 and the first cylinder 11 are fixed together by vulcanization. An annular insertion groove 30 is formed between the first fluororubber sleeve 3 and the second cylinder 13. The movable ring 2 is coaxial with the fixed ring 1. The movable ring 2 is composed of a third cylinder 21, a second transition ring 22, and a fourth cylinder 23 which are coaxial and sequentially connected. The third cylinder 21 is inserted into the annular insertion groove 30, and the fourth cylinder 23 passes through the limiting ring 14. The movable ring 2 is covered with a second fluororubber sleeve 4 on the outside, and the second fluororubber sleeve 4 is fixed to the movable ring 2 by vulcanization. The second fluororubber sleeve 4 is tightly combined with the outer wall of the third cylinder 21, the end of the second transition ring 22 away from the fixed ring 1, and the inner wall of the fourth cylinder 23. The outer diameter of the second fluororubber sleeve is smaller than the outer diameter of the first fluororubber sleeve 3. The second fluororubber sleeve 4 is tightly fitted with the inner wall of the annular insertion groove 30 formed by the first fluororubber sleeve 3. A third fluororubber sleeve 5 is fixed to the end of the limiting ring 14 close to the first cylinder 11. The third fluororubber sleeve 5 is fixed to the limiting ring 14 by vulcanization. The third fluororubber sleeve 5 is covered with an annular spring 50 on the outside, and the annular spring 50 is in a tensioned state. The inner side of the third fluororubber sleeve 5 is provided with a C-shaped lip, and the inner side of the third fluororubber sleeve 5 is close to the outer wall of the fourth cylinder 23.

[0015] A protective ring 6 is installed on the fourth cylinder 23, and the protective ring 6 is composed of a coaxial and connected connecting ring 61 and a fifth cylinder 62. The connecting ring 61 is installed on the outer wall of the fourth cylinder 23, and the fifth cylinder 62 is located at the end of the connecting ring 61 close to the limiting ring 14.

[0016] An annular mounting groove is provided on the outer wall of the fourth cylinder 23, and the inner side of the connecting ring 61 is embedded in the mounting groove.

[0017] An anti-slip groove is provided on the outer wall of the third fluororubber sleeve 5, and a portion of the annular spring 50 is embedded in the anti-slip groove.

[0018] The movable ring 2 is fixed with a fourth fluororubber sleeve 7 by vulcanization, the first fluororubber sleeve 3 is tightly combined with the inner wall of the third cylinder 21 and the end of the second transition ring 22 close to the fixed ring 1, and the third fluororubber sleeve 5 is provided with a plurality of compression rings 70 on the side close to the limiting ring 14, and the compression ring 70 is in close contact with the limiting ring 14.

[0019] A plurality of sealing convex rings 40 are provided on the outer wall of the first fluororubber sleeve 3 and the inner wall of the second fluororubber sleeve 4 located in the inner area of ​​the fourth cylinder 23 .

[0020] Working process of this utility model:

[0021] During the operation of the rotating shaft sealing ring of the wear-resistant shaft of the utility model, the rotating shaft is tightly clamped by the second fluororubber sleeve 4. When the rotating shaft rotates, the second fluororubber sleeve 4 and the movable ring 2 rotate together. The rotating shaft does not generate dynamic friction with the second fluororubber sleeve 4, and the rotating shaft will not be worn. After long-term operation, the fourth cylinder 23 and the second fluororubber sleeve 4 are worn. After being worn to a certain extent, only the movable ring 2 or the second fluororubber sleeve 4 needs to be replaced, and the replacement cost is low.

[0022] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. The rotary shaft sealing ring of the anti-wear shaft is characterized by: The invention comprises a fixed ring (1), a movable ring (2), a first fluororubber sleeve (3), a second fluororubber sleeve (4), and a third fluororubber sleeve (5); the fixed ring (1) is composed of a first cylinder (11), a first transition ring (12), a second cylinder (13), and a stop ring (14) which are coaxial and sequentially connected; the first cylinder (11), the first transition ring (12), the second cylinder (13), and the stop ring (14) are an integrated structure; the outer diameter of the second cylinder (13) is smaller than the inner diameter of the first cylinder (11); ... 3) is located outside the area surrounded by the first cylinder (11), the first cylinder (11) is covered with a first fluororubber sleeve (3), the first fluororubber sleeve (3) and the first cylinder (11) are fixed together by vulcanization, an annular insertion groove (30) is formed between the first fluororubber sleeve (3) and the second cylinder (13), the movable ring (2) is coaxial with the fixed ring (1), the movable ring (2) is composed of a third cylinder (21), a second transition ring (22), and a fourth cylinder (23) which are coaxial and sequentially connected, and the third cylinder The movable ring (21) is inserted into the annular insertion groove (30), the fourth cylinder (23) passes through the limiting ring (14), the movable ring (2) is covered with a second fluororubber sleeve (4), the second fluororubber sleeve (4) and the movable ring (2) are fixed together by vulcanization, the second fluororubber sleeve (4) is tightly combined with the outer wall of the third cylinder (21), the end of the second transition ring (22) away from the fixed ring (1), and the inner wall of the fourth cylinder (23), the outer diameter of the second fluororubber sleeve is smaller than the outer diameter of the first fluororubber sleeve (3), and the second fluororubber sleeve (4) is tightly combined with the outer wall of the third cylinder (21), the end of the second transition ring (22) away from the fixed ring (1), and the inner wall of the fourth cylinder (23). The inner wall of the annular insertion groove (30) formed by the first fluororubber sleeve (3) is tightly fitted, and a third fluororubber sleeve (5) is fixed to the end of the limiting ring (14) close to the first cylinder (11), and the third fluororubber sleeve (5) and the limiting ring (14) are fixed together by vulcanization. An annular spring (50) is sleeved on the outside of the third fluororubber sleeve (5), and the annular spring (50) is in a tensioned state. A C-shaped lip is provided on the inner side of the third fluororubber sleeve (5), and the inner side of the third fluororubber sleeve (5) is tightly fitted to the outer wall of the fourth cylinder (23).

2. The rotary shaft seal ring for the anti-wear shaft according to claim 1, characterized in that: A protective ring (6) is installed on the fourth cylinder (23), and the protective ring (6) is composed of a coaxial and connected connecting ring (61) and a fifth cylinder (62). The connecting ring (61) is installed on the outer wall of the fourth cylinder (23), and the fifth cylinder (62) is located at the end of the connecting ring (61) close to the limiting ring (14).

3. The rotary shaft seal ring for the anti-wear shaft according to claim 2, characterized in that: An annular mounting groove is provided on the outer wall of the fourth cylinder (23), and the inner side of the connecting ring (61) is embedded in the mounting groove.

4. The rotary shaft seal ring for the anti-wear shaft according to claim 1, characterized in that: An anti-slip groove is provided on the outer wall of the third fluororubber sleeve (5), and a portion of the annular spring (50) is embedded in the anti-slip groove.

5. The rotary shaft sealing ring for the anti-wear shaft according to claim 1, characterized in that: The movable ring (2) is fixed with a fourth fluororubber sleeve (7) by vulcanization, the first fluororubber sleeve (3) is tightly combined with the inner wall of the third cylinder (21) and the end of the second transition ring (22) close to the fixed ring (1), and the third fluororubber sleeve (5) is provided with a plurality of compression rings (70) on the side close to the limiting ring (14), and the compression rings (70) are in tight contact with the limiting ring (14).

6. The rotary shaft seal ring for the anti-wear shaft according to claim 1, characterized in that: A plurality of sealing convex rings (40) are provided on the outer wall of the first fluororubber sleeve (3) and the inner wall of the second fluororubber sleeve (4) located in the inner area of ​​the fourth cylinder (23).

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