Middle-high pressure multi-lip sealing ring for shaft

Abstract

The utility model relates to a sealing ring, belongs to the technical field of sealing rings, and particularly relates to a middle-high pressure multi-lip sealing ring for a shaft, which comprises a first sealing ring, a second sealing ring is fixedly connected onto the first sealing ring, and a third sealing ring and a fourth sealing ring are fixedly connected onto the second sealing ring. The device further comprises a limiting rod, a first sealing lip, a second sealing lip and a third sealing lip. According to the sealing device, the first sealing ring, the groove, the limiting rod, the third sealing lip and the sealing cover are matched, the limiting rod is embedded into the sealing cover to limit the device, so that the device cannot rotate, the sealing performance of the device is ensured, a first convex ring is embedded into a first clamping groove, and a second convex ring is embedded into a second clamping groove, so that the sealing performance of the device is improved. And a third convex ring is embedded into a third clamping groove, the sealing effect of the device is improved, through cooperation of a first sealing lip, a second sealing lip and a third sealing lip, the device can better adapt to the medium and high pressure environment, and therefore the sealing effect of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing ring, specifically a middle and high pressure multi-lip sealing ring for shaft. BACKGROUND

[0002] Under the middle and high pressure environment, single-lip sealing ring is easy to fail due to excessive pressure, resulting in leakage, so multi-lip sealing ring is needed. The multi-lip design can better adapt to the middle and high pressure environment by sharing the pressure with multiple sealing lips, ensuring stable sealing performance.

[0003] The Chinese patent with publication number CN216642656U discloses a middle and high pressure sealing ring for shaft, which comprises a first sealing ring body and a hydraulic cylinder body. The inner and outer surfaces of the first sealing ring body are provided with first grooves. The lower surface of the first sealing ring body is fixedly connected with a third sealing ring body. The upper surface of the third sealing ring body is fixedly connected with a fourth sealing ring body. The inner and outer surfaces of the fourth sealing ring body are provided with second grooves. The upper surface of the third sealing ring body is fixedly connected with a second sealing ring body. The outer surface of the second sealing ring body is provided with a third groove. The inner circle of the second sealing ring body is provided with a first shaft through groove. The second sealing ring body is arranged inside the first sealing ring body. The patent improves the sealing effect by setting the first sealing ring body, the second sealing ring body, the fourth sealing ring body, and the third sealing ring body, further preventing oil leakage.

[0004] In the above technical solution, after the device is embedded in the sealing cover, it is not limited, so that the device is easy to rotate under the action of external force after installation is completed. When the sealing ring rotates, a certain gap is generated, which reduces the sealing effect of the device.

[0005] Therefore, the present application provides a middle and high pressure multi-lip sealing ring for shaft. SUMMARY

[0006] To solve the above technical problems, the utility model provides a middle and high pressure multi-lip sealing ring for shaft, which can be limited by embedding the limiting rod into the sealing cover, so that the device cannot rotate during use, ensuring the sealing effect of the device. The first sealing lip, the second sealing lip, and the third sealing lip cooperate to make the device better adapt to the middle and high pressure environment, thereby improving the sealing effect of the device.

[0007] The technical solution for achieving the purpose of the utility model is as follows: a middle and high pressure multi-lip sealing ring for shaft, comprising a first sealing ring, a second sealing ring fixedly connected to the first sealing ring, a third sealing ring and a fourth sealing ring fixedly connected to the second sealing ring, and further comprising:

[0008] A plurality of limiting rods are fixedly connected in the first sealing ring, a plurality of grooves are formed in the first sealing ring, a plurality of limiting rods are fixedly connected in the grooves respectively, and a plurality of third sealing lips are fixedly connected on the plurality of limiting rods respectively.

[0009] Preferably, a through hole is formed in the first sealing ring, a through groove is formed in the third sealing ring, and a piston rod is movably connected in the through groove.

[0010] Preferably, two first clamping grooves are formed in the first sealing ring, a second clamping groove is formed in the third sealing ring, and two third clamping grooves are formed in the fourth sealing ring.

[0011] Preferably, three first sealing lips are fixedly connected on the second sealing ring, and three second sealing lips are fixedly connected on the third sealing ring.

[0012] Preferably, a sealing cover is movably inserted in the first sealing ring, and a hydraulic cylinder body is fixedly connected on the sealing cover.

[0013] Preferably, two first convex rings, one second convex ring and two third convex rings are fixedly connected on the sealing cover, the first convex ring is matched with the first clamping groove, the second convex ring is matched with the second clamping groove, and the third convex ring is matched with the third clamping groove.

[0014] Compared with the prior art, the utility model has the following obvious advantages:

[0015] Firstly, in the utility model, the first sealing ring, the groove, the limiting rod, the third sealing lip and the sealing cover are matched, the limiting rod is embedded in the sealing cover, the device is limited, the device cannot rotate, and the sealing property of the device is ensured.

[0016] Secondly, in the utility model, the first convex ring is embedded in the first clamping groove, the second convex ring is embedded in the second clamping groove, and the third convex ring is embedded in the third clamping groove, the sealing effect of the device is improved, the first sealing lip, the second sealing lip and the third sealing lip are matched, the device can better adapt to the high-pressure environment, and the sealing effect of the device is improved. DRAWINGS

[0017] The utility model will be explained further in combination with the drawings and the embodiments:

[0018] Fig. 1 It is the three-dimensional structure schematic diagram of the utility model;

[0019] Fig. 2 It is the packaging structure schematic diagram of the utility model;

[0020] Fig. 3 It is the sectional structure sectional view of the utility model.

[0021] Reference signs:

[0022] 1, the first sealing ring; 2, the second sealing ring; 3, the third sealing ring; 4, the fourth sealing ring; 5, the through hole; 6, the through slot; 7, the first clamping groove; 8, the second clamping groove; 9, the third clamping groove; 10, the first sealing lip; 11, the second sealing lip; 12, the groove; 13, the limiting rod; 14, the third sealing lip; 15, the hydraulic cylinder body; 16, the piston rod; 17, the sealing cover; 18, the first convex ring; 19, the second convex ring; 20, the third convex ring. DETAILED DESCRIPTION

[0023] The utility model is described in detail below, and the technical scheme of the utility model embodiment is clearly and completely described. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment of the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] The utility model discloses a kind of high pressure multi-lip sealing rings for shaft by improvement, and the technical scheme of the utility model is:

[0025] As shown in Figs. 1-3 A kind of high pressure multi-lip sealing rings for shaft, including first sealing ring 1, first sealing ring 1 is fixedly connected with second sealing ring 2, first sealing ring 1 is perpendicular to the top of second sealing ring 2, second sealing ring 2 is fixedly connected with third sealing ring 3 and fourth sealing ring 4, the diameter of second sealing ring 2 is greater than the diameter of fourth sealing ring 4, which is greater than the diameter of first sealing ring 1, which is greater than the diameter of third sealing ring 3, further comprising;

[0026] Limiting rod 13, multiple limiting rods 13 are fixedly connected in first sealing ring 1, multiple limiting rods 13 are circularly arrayed with the center of first sealing ring 1 as center, multiple grooves 12 are formed in first sealing ring 1, multiple limiting rods 13 are fixedly connected in multiple grooves 12 respectively, multiple third sealing lips 14 are fixedly connected on multiple limiting rods 13 respectively, third sealing lips 14 are linearly arrayed on the same limiting rod 13, by the cooperation of first sealing ring 1, groove 12, limiting rod 13, third sealing lip 14 and sealing cover 17, limiting rod 13 is embedded in sealing cover 17, the device is limited, so that the device cannot rotate, and the sealing property of the device is ensured.

[0027] Further, as shown in Figs. 1-3 First sealing ring 1 is provided with through hole 5, the diameter of through hole 5 is greater than the diameter of third sealing ring 3, third sealing ring 3 is provided with through slot 6, the diameter of through slot 6 is equal to the diameter of piston rod 16, and piston rod 16 is movably connected in through slot 6.

[0028] Further, as shown in Fig. 1 and Fig. 2 , two first clamping grooves 7 are formed on the first sealing ring 1, the two first clamping grooves 7 are respectively located on the inner wall and the outer wall of the first sealing ring 1, a second clamping groove 8 is formed on the third sealing ring 3, two third clamping grooves 9 are formed on the fourth sealing ring 4, the cross sections of the first clamping groove 7, the second clamping groove 8 and the third clamping groove 9 are all semicircular, and the diameter of the first clamping groove 7 is consistent with the diameter of the second clamping groove 8.

[0029] Further, as shown in Figs. 1-3 , three first sealing lips 10 are fixedly connected on the second sealing ring 2, the first sealing lips 10 are linearly arrayed on the outer wall of the second sealing ring 2, three second sealing lips 11 are fixedly connected on the third sealing ring 3, and the second sealing lips 11 are linearly arrayed on the outer wall of the third sealing ring 3.

[0030] Further, as shown in Fig. 3 , a sealing cover 17 is movably inserted on the first sealing ring 1, the diameter of the sealing cover 17 is equal to the diameter of the second sealing ring 2, and a hydraulic cylinder body 15 is fixedly connected on the sealing cover 17.

[0031] Further, as shown in Fig. 3 , two first convex rings 18, a second convex ring 19 and two third convex rings 20 are fixedly connected on the sealing cover 17, the first convex ring 18 is matched with the first clamping groove 7, the second convex ring 19 is matched with the second clamping groove 8, and the third convex ring 20 is matched with the third clamping groove 9, the first convex ring 18 is embedded in the first clamping groove 7, the second convex ring 19 is embedded in the second clamping groove 8, and the third convex ring 20 is embedded in the third clamping groove 9, so that the sealing effect of the device is improved.

[0032] Specific working method is: the second sealing ring 2 is inserted into the hydraulic cylinder body 15, so that the first sealing lip 10 on the second sealing ring 2 is attached to the inner wall of the hydraulic cylinder body 15, and the piston rod 16 is passed through the through slot 6 of the third sealing ring 3, with the movement of the second sealing ring 2, the first sealing ring 1 first meets the sealing cover 17 and is embedded in the sealing cover 17, then the third sealing ring 3 and the fourth sealing ring 4 are embedded in the sealing cover 17, the first convex ring 18 is embedded in the first clamping groove 7, the second convex ring 19 is embedded in the second clamping groove 8, and the third convex ring 20 is embedded in the third clamping groove 9, and the second sealing lip 11 on the third sealing ring 3 and the third sealing lip 14 on the limiting rod 13 are all embedded in the sealing cover 17, so that the installation of the device is completed.

[0033] The technical means disclosed by the utility model scheme is not limited to the technical means disclosed by the above technical means, and also includes technical solutions composed of equivalent replacement of the above technical features. The unfinished matters of the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A medium-high pressure multi-lip seal ring for shafts, comprising a first seal ring (1), characterized in that: The first sealing ring (1) is fixedly connected with a second sealing ring (2), the second sealing ring (2) is fixedly connected with a third sealing ring (3) and a fourth sealing ring (4), and the sealing device further comprises; A plurality of limiting rods (13) are fixedly connected in the first sealing ring (1), a plurality of recesses (12) are formed in the first sealing ring (1), a plurality of limiting rods (13) are fixedly connected in the recesses (12), respectively, and a plurality of third sealing lips (14) are fixedly connected on the limiting rods (13), respectively.

2. The high pressure multi-lip seal ring for shafts according to claim 1, characterized in that: A through hole (5) is formed in the first sealing ring (1), a through groove (6) is formed in the third sealing ring (3), and a piston rod (16) is movably connected in the through groove (6).

3. The high pressure multi-lip seal ring for shaft as claimed in claim 1, wherein: Two first clamping grooves (7) are formed in the first sealing ring (1), a second clamping groove (8) is formed in the third sealing ring (3), and two third clamping grooves (9) are formed in the fourth sealing ring (4).

4. The high pressure multi-lip seal ring for shaft as claimed in claim 1, wherein: Three first sealing lips (10) are fixedly connected on the second sealing ring (2), and three second sealing lips (11) are fixedly connected on the third sealing ring (3).

5. The high pressure multi-lip seal ring for shaft as claimed in claim 1, wherein: A sealing cover (17) is movably inserted on the first sealing ring (1), and a hydraulic cylinder body (15) is fixedly connected on the sealing cover (17).

6. The high pressure multi-lip seal ring for shaft as claimed in claim 5, wherein: Two first convex rings (18), one second convex ring (19) and two third convex rings (20) are fixedly connected on the sealing cover (17), the first convex ring (18) is matched with the first clamping groove (7), the second convex ring (19) is matched with the second clamping groove (8), and the third convex ring (20) is matched with the third clamping groove (9).

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