CN217951229U

CN217951229U - Sealing ring with buffering performance for hydraulic cylinder

Info

Publication number: CN217951229U
Application number: CN202221912973.9U
Authority: CN
Inventors: 张洪伟; 毛德君; 张静
Original assignee: Tektronix Seals Yantai Co ltd
Current assignee: Tektronix Seals Yantai Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-12-02
Anticipated expiration: 2032-07-21

Abstract

The utility model relates to a sealing washer for pneumatic cylinder with shock-absorbing capacity belongs to the sealed technical field of pneumatic cylinder, including annular circle body, circle body tip do not is equipped with in with outer with, in with the one end of keeping away from the circle body be equipped with main lip, be equipped with static seal lip with the one end of keeping away from the circle body outward, outer with the tip be equipped with outer with the boss. The buffer has the advantages of good buffer performance and long service life.

Description

Sealing ring with buffering performance for hydraulic cylinder

Technical Field

The utility model relates to a sealing washer for pneumatic cylinder with shock-absorbing capacity belongs to the pneumatic cylinder sealing technique field.

Background

The sealing ring is an indispensable important part in a sealing system of the hydraulic cylinder and mainly prevents hydraulic oil in the hydraulic cylinder from flowing out, sometimes in the hydraulic system, the service life of the hydraulic cylinder is directly determined by the service life of the sealing ring, and in addition, the sealing ring is required to have better sealing performance during working, and when the hydraulic cylinder is stopped, the sealing ring is still required to keep better static sealing performance.

A related chinese patent publication No. CN206145125U discloses a seal ring, which includes an annular seal ring body, the seal ring body is disposed through, the seal ring body has an upper end face, a lower end face, an inner side face and an outer side face; be provided with the relief groove on the lateral surface, the relief groove is close to the up end setting, and medial surface and lateral surface are the wave face, and are provided with sealed arch on the medial surface, and sealed arch is close to down the terminal surface setting, and has the contained angle between sealed arch and the medial surface, and sealed arch sets up towards terminal surface direction slope down.

The inventor thinks that after the sealing ring is installed in a sealing system of a hydraulic cylinder, the sealing ring needs to buffer a part of oil pressure, so that the sealing ring has poor buffering performance and is easy to damage the structure of the sealing ring after being used for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides a sealing washer for pneumatic cylinder with shock-absorbing capacity.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the sealing ring with the buffering performance for the hydraulic cylinder comprises an annular ring body, wherein an inner heel and an outer heel are respectively arranged at the end part of the ring body, a main lip is arranged at one end, away from the ring body, of the inner heel, a static sealing lip is arranged at one end, away from the ring body, of the outer heel, and an outer heel boss is arranged at the end part of the outer heel.

The beneficial effect who adopts above-mentioned scheme is: the circle body can be inside with outer the effect of connecting, inside with can play the effect of connecting to main lip, main lip is inconsistent with the piston rod of pneumatic cylinder, the dynamic seal performance that has the preferred, outer with can play the effect of connecting to quiet seal lip, when the pneumatic cylinder shut down the back, quiet seal lip is contradicted with the sealed axle sleeve of pneumatic cylinder mutually, when the pneumatic cylinder is shutting down, still have the sealing performance of preferred, outer with the tip set up outer with the boss, when the backpressure phenomenon appears in the pneumatic cylinder, the quiet seal lip is opened with boss department gap outside to the backpressure fluid, can form oil return channel, and then reach the oil return effect, and then can play the cushioning effect to the oil pressure, and then reducible destruction to self structure.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

furthermore, an installation groove is formed in the contact position of the outer heel and the outer heel boss, and the outer heel boss is arranged in the installation groove.

Furthermore, the outer heel boss comprises a first table body and a second table body, the first table body is in a right trapezoid shape, the second table body is in a right triangle shape, and the first table body and the second table body are integrally formed.

Furthermore, the end of the static seal lip, which is far away from the outer heel, is provided with a static seal lip angle, and the static seal lip angle is an obtuse angle.

Furthermore, a groove is formed in one end, away from the ring body, of the inner heel, a check ring is arranged in the groove, and a check ring boss is arranged at one end, away from the inner heel, of the check ring.

Furthermore, one end, far away from the inner heel, of the retainer ring protrudes out of the inner heel, and the cross section of the groove is arc-shaped.

Furthermore, the main lip mouth end part is provided with a main lip mouth angle, and the main lip mouth angle is an obtuse angle.

Furthermore, one end of the main lip, which is far away from the inner heel, is provided with a main lip end surface boss, and the main lip end surface boss is provided with a chamfer.

Compared with the prior art, the beneficial effects of the utility model are that:

1. according to the oil pressure sealing ring, the ring body and the outer heel are arranged, the outer heel boss is arranged on the outer heel, the hydraulic cylinder has a back pressure phenomenon, when the sealing ring bears large oil pressure, back pressure oil is used for opening the static sealing lip opening through the gap at the outer heel boss, an oil return channel can be formed, an oil return effect is achieved, the oil pressure can be buffered, and the damage to the structure of the oil pressure sealing ring can be reduced;

2. this application can play the supporting role to the circle body with interior through setting up the retaining ring, the intensity of multiplicable this sealing washer simultaneously.

Drawings

FIG. 1 is a schematic cross-sectional view of a seal ring for a hydraulic cylinder with damping performance according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of the embodiment of the present application for highlighting the main lip angle.

In the figure, 1, circle body; 2. a main lip; 21. a main lip angle; 22. a main lip end surface boss; 23. chamfering; 3. statically sealing the lip; 31. statically sealing the lip angle; 4. an inner heel; 41. a groove; 42. a retainer ring; 43. a retainer ring boss; 5. an outer heel; 51. mounting grooves; 6. an outer heel boss; 61. a first stage body; 62. and a second table body.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in figure 1, a sealing washer for pneumatic cylinder with shock-absorbing capacity includes annular circle body 1, it is interior with 4 and outer with 5, it sets up respectively at the both ends of circle body 1 with outer with 4 to interior with 5, interior one end of keeping away from circle body 1 with 4 is equipped with main lip 2, it is equipped with static seal lip 3 with 5 one end of keeping away from circle body 1 outward, when the pneumatic cylinder operation, main lip 2 is inconsistent with the piston rod of pneumatic cylinder, the dynamic seal performance that has the preferred, static seal lip 3 is contradicted with the sealed axle sleeve of pneumatic cylinder, when the pneumatic cylinder is shutting down, the sealing performance that has the preferred.

As shown in fig. 1 and 2, the end of the static seal lip 3 away from the outer heel 5 is provided with a static seal lip angle 31, the static seal lip angle 31 is an obtuse angle, the degree of the static seal lip angle 31 is 124 degrees, the static seal lip angle 31 is set to be an obtuse angle, the degree is controlled to be 124 degrees, the impact force between the static seal lip 3 and the guide sleeve can be reduced in the instant of starting the hydraulic cylinder, and further protection effect is achieved on the sealing ring.

As shown in fig. 1 and fig. 2, a main lip angle 21 is arranged at the end of the main lip 2, the main lip angle 21 is an obtuse angle, the degree of the main lip angle 21 is 117 °, the main lip angle 21 is in contact with the piston rod, the sealing ring can have better dynamic sealing performance, the degree of the main lip angle 21 is set to 117 °, the contact area between the piston rod and the main lip 2 can be set to an optimal value, the dynamic sealing performance of the sealing ring can be further ensured, the copper wire can protect the oil film on the surface of the piston rod, the oil film on the surface of the piston rod can be ensured, sufficient lubrication can be facilitated, and the problem of oil film accumulation can be reduced.

As shown in fig. 1, a groove 41 is formed in one end of the inner heel 4, which is far away from the ring body 1, a retaining ring 42 is arranged in the groove 41 of the inner heel 4, the retaining ring 42 is made of a material with certain strength, and the retaining ring 42 can play a better supporting role, so that the strength of the inner heel 4, the ring body 1 and the outer heel 5 can be increased; the cross-section of recess 41 is the arc, and curved recess 41 can increase with retaining ring 42 area of contact, and then can improve the steadiness of installing retaining ring 42, and retaining ring 42 atress back is convenient for transmit power to internal heel 4 and circle body 1 simultaneously.

As shown in fig. 1, one end of the retainer ring 42, which is far away from the inner heel 4, protrudes out of the inner heel 4, one end of the retainer ring 42, which is far away from the inner heel 4, is provided with a retainer ring boss 43, the retainer ring 42 is matched with the retainer ring boss 43 to support a piston rod of a hydraulic cylinder, the inner diameter of the retainer ring 42 is matched with the piston rod without clearance, the design of the retainer ring boss 43 can reduce the contact area between the retainer ring 42 and the piston rod, so that friction is reduced, meanwhile, a gap of the retainer ring boss 43 can play a lubricating role, so that the piston rod can be protected, and the problem that a guide sleeve in a sealing structure scratches the piston rod can be reduced.

As shown in fig. 1, an installation groove 51 is formed at the end of the outer heel 5, the outer heel 5 is fixedly provided with an outer heel boss 6 in the installation groove 51, when the hydraulic cylinder has a back pressure phenomenon, back pressure liquid oil can open a precise lip sealing opening through a gap at the outer heel boss 6, so that an oil return channel can be formed, an oil return effect is achieved, the oil pressure can be buffered, and the damage to the structure of the hydraulic cylinder can be reduced; set up mounting groove 51 on outer heel 5 and install to outer heel boss 6, can improve the steadiness to the installation of outer heel boss 6 simultaneously.

As shown in fig. 1, the outer boss 6 includes a first table body 61 and a second table body 62, the first table body 61 is a right trapezoid, the second table body 62 is a right triangle, the first table body 61 and the second table body 62 are integrally formed, and the first table body 61 and the second table body 62 are matched with each other, so that an oil return effect of the outer boss 6 can be improved, and a buffering effect of the sealing ring can be further improved.

As shown in fig. 1, the one end of following 4 in keeping away from of main lip 2 is equipped with main lip terminal surface boss 22, and main lip terminal surface boss 22 cooperatees with boss 6 outward, can form the backpressure oil return passageway, reaches the effect of oil return, and chamfer 23 has been seted up to main lip terminal surface boss 22, and the gap between chamfer 23 and the guide pin bushing of sealing system is convenient for the passing through of hydraulic oil, and then alleviates the problem of this sealing washer backpressure, can prolong the life of this sealing washer to a certain extent.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a sealing washer for pneumatic cylinder with shock-absorbing capacity which characterized in that: including annular circle body (1), circle body (1) tip is equipped with respectively in with (4) and with (5) outward, in with (4) keep away from the one end of circle body (1) and be equipped with main lip (2), outward with (5) keep away from the one end of circle body (1) and be equipped with quiet sealing lip (3), outward with (5) tip be equipped with outward with boss (6).

2. The seal ring for the hydraulic cylinder having the cushioning property according to claim 1, wherein: the outer supporting lug boss (6) is arranged in the mounting groove (51), and the outer supporting lug boss (5) is abutted to the outer supporting lug boss (6) and is provided with the mounting groove (51).

3. The seal ring for the hydraulic cylinder having a shock-absorbing performance according to claim 2, wherein: the outer heel boss (6) comprises a first table body (61) and a second table body (62), the first table body (61) is in a right trapezoid shape, the second table body (62) is in a right triangle shape, and the first table body (61) and the second table body (62) are integrally formed.

4. The seal ring for the hydraulic cylinder having the cushioning property according to claim 1, wherein: the one end that outer (5) were kept away from in quiet seal lip (3) is equipped with quiet seal lip angle (31), quiet seal lip angle (31) are the obtuse angle.

5. The seal ring for the hydraulic cylinder having the cushioning property according to claim 1, wherein: a groove (41) is formed in one end, far away from the ring body (1), of the inner heel (4), a check ring (42) is arranged in the groove (41) of the inner heel (4), and a check ring boss (43) is arranged at one end, far away from the inner heel (4), of the check ring (42).

6. The seal ring for the hydraulic cylinder with the buffering performance according to claim 5, wherein: one end, far away from the inner heel (4), of the retainer ring (42) protrudes out of the inner heel (4), and the cross section of the groove (41) is arc-shaped.

7. The seal ring for the hydraulic cylinder with the buffering performance according to claim 1, wherein: the end part of the main lip (2) is provided with a main lip angle (21), and the main lip angle (21) is an obtuse angle.

8. The seal ring for the hydraulic cylinder having the cushioning property according to claim 1, wherein: one end of the main lip (2) far away from the inner heel (4) is provided with a main lip end surface boss (22), and the main lip end surface boss (22) is provided with a chamfer (23).