CN220930175U

CN220930175U - Rotary joint seal

Info

Publication number: CN220930175U
Application number: CN202322512527.XU
Authority: CN
Inventors: 黄广明; 李厚宁; 叶健鸿
Original assignee: Guangzhou Jst Seals Technology Co ltd
Current assignee: Guangzhou Jst Seals Technology Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-10
Anticipated expiration: 2033-09-15

Abstract

The utility model relates to the technical field of rotary joints, and discloses a rotary joint sealing member which comprises a slip ring and an elastomer; the slip ring is provided with a ring groove, and the ring groove is in an annular groove shape and is arranged on the outer side wall of the slip ring in a surrounding mode; the elastic body is abutted with the slip ring, the elastic body is sleeved on the outer side of the slip ring, and the elastic body covers the annular groove. By arranging the annular groove on the slip ring, the elastic body is sleeved outside the slip ring and covers the annular groove, so that the contact area between the slip ring and the elastic body is reduced, the friction force is reduced, the relative rotation abrasion loss between the slip ring and the elastic body is reduced, leakage is avoided, and the service life is prolonged.

Description

Rotary joint seal

Technical Field

The utility model relates to the technical field of rotary joints, in particular to a rotary joint sealing element.

Background

The rotary joint is widely applied to engineering machinery and is used for ensuring the supply of pipeline media when mechanical equipment performs rotary motion. Compared with the common pipeline, the mechanical equipment using the rotary joint reduces the contact between the pipelines, greatly prolongs the service life of the equipment, and generally, the conveying medium of the conventional rotary joint pipeline is hydraulic oil.

The sealing element of the rotary joint needs to ensure the rotary motion and simultaneously seal, and the sealing element can directly influence the quality of the rotary joint. The existing rotary joint sealing element generally comprises a sliding ring and an elastic body, and the sliding ring is pressed against the elastic body to ensure the sealing of the sliding ring in the rotating process relative to the elastic body. However, the existing elastic body and the slip ring are of a surface-to-surface joint structure, the contact area is larger, the friction force is larger, the power of a working element is higher, the slip ring is rubbed and heated due to long-time rotary movement, the abrasion loss of the slip ring is increased, the compression rate of the elastic body is reduced, the elasticity is reduced, leakage occurs, and the service life is short.

Disclosure of utility model

The utility model aims to solve the technical problems that:

the friction force between the elastic body and the slip ring is large, the abrasion loss is increased, and leakage occurs, so that the service life is influenced.

In order to solve the above technical problems, the present utility model provides a rotary joint seal, including:

The sliding ring is provided with an annular groove, and the annular groove is arranged on the outer side wall of the sliding ring in a surrounding manner in an annular groove shape; and

And the elastic body is abutted with the slip ring, the elastic body is sleeved on the outer side of the slip ring, and the elastic body covers the annular groove.

In one embodiment, the slip ring and the elastic body are both in an annular structure, and the slip ring is collinear with the central axis of the elastic body.

In one embodiment, the number of the ring grooves is at least two, and the ring grooves are arranged at intervals along the central axis direction of the slip ring.

In one embodiment, the cross section of the ring groove is V-shaped, and the side walls on both sides of the ring groove are gradually arranged in a close-proximity inclined manner from the elastic body to the slip ring.

In one embodiment, the slip ring is further provided with a slot; the grooving is annular groove-shaped and surrounds the inner side wall of the slip ring.

In one embodiment, the cross section of the slot is in a trapezoid shape, and two side walls of the slot are gradually and adjacently arranged and obliquely arranged from the slip ring to the elastic body.

In one embodiment, the elastomer includes a top pressure portion and an extension portion; the top pressure part is sleeved on the outer side of the slip ring and is abutted against the outer side wall of the slip ring, and the extension part is arranged on the outer side of the top pressure part in a surrounding mode.

In one embodiment, the width dimension of the pressing portion in the central axis direction of the elastic body is B1, and the width dimension of the extending portion in the central axis direction of the elastic body is B2;

Wherein B1 > B2.

In one embodiment 0.6B1.ltoreq.B2.ltoreq. 0.8B1.

In one embodiment, the pressing portion is in a ring shape, the extending portion is in a ring shape, and the extending portion is located at a middle position of the pressing portion along a central axis direction of the elastic body, and the elastic body is an integral piece.

Compared with the prior art, the rotary joint sealing piece has the beneficial effects that:

By arranging the annular groove on the slip ring, the elastic body is sleeved outside the slip ring and covers the annular groove, so that the contact area between the slip ring and the elastic body is reduced, the friction force is reduced, the relative rotation abrasion loss between the slip ring and the elastic body is reduced, leakage is avoided, and the service life is prolonged.

Through seting up the fluting on the sliding ring inside wall, provide the space of keeping away of sliding ring, improve the deformation volume of sliding ring, and then reduce the frictional force between sliding ring and the elastomer, further reduce pivoted wearing and tearing volume, increase of service life.

The width dimension of the jacking part is larger than that of the extension part, the jacking part is propped against the sliding ring, the compression amount of the propping position of the elastic body and the sliding ring is increased through the jacking part, and then the initial sealing stress of the sliding ring is increased, and the sealing performance is improved. And the volume of the elastic body is reduced through the extension part, so that the volume ratio of the elastic body relative to the space volume is reduced, the friction force in the rotating process of the slip ring is reduced, the rotating abrasion loss is further reduced, and the service life is prolonged.

Drawings

FIG. 1 is a schematic view, partially in section, of a swivel joint seal according to one embodiment of the utility model;

Fig. 2 is a schematic structural diagram of a circle a in fig. 1.

The meaning of the reference numerals in the drawings are:

100. A swivel joint seal;

10. a slip ring; 11. a ring groove; 15. slotting;

20. an elastomer; 21. a pressing part; 22. an extension.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, a rotary joint seal 100 according to an embodiment of the utility model includes a slip ring 10 and an elastomer 20; the rotary joint seal 100 is disposed between two parts that are rotatable relative to each other and seals hydraulic oil that is transferred inside the parts from leaking during the relative rotation of the two parts. The slip ring 10 is provided with a ring groove 11, and the ring groove 11 is arranged on the outer side wall of the slip ring 10 in a ring groove shape in a surrounding manner; the slip ring 10 is sleeved on an external part. The elastic body 20 is abutted with the slip ring 10, the elastic body 20 is sleeved outside the slip ring 10, the elastic body 20 covers the annular groove 11, the elastic body 20 is correspondingly arranged in an external part, and the elastic body 20 is sleeved outside the slip ring 10, so that the external parts can rotate relatively; by providing the annular groove 11 between the slip ring 10 and the elastic body 20, the contact area between the slip ring 10 and the elastic body 20 is reduced, and the rotational friction force between the slip ring 10 and the elastic body 20 is further reduced.

Further, the slip ring 10 has an annular structure, the elastic body 20 is sleeved outside the slip ring 10, and the slip ring 10 is collinear with the central axis of the elastic body 20. In this embodiment, the number of the ring grooves 11 is at least two, the ring grooves 11 are arranged at intervals along the central axis direction of the slip ring 10, and by arranging a plurality of ring grooves 11, the contact area between the slip ring 10 and the elastic body 20 is further reduced, and the friction between the slip ring 10 and the elastic body 20 is further reduced.

Further, the cross section of the ring groove 11 is V-shaped, and the side walls at two sides of the ring groove 11 are gradually and adjacently arranged from the elastic body 20 to the inner direction of the slip ring 10, so that the opening of the ring groove 11 faces the elastic body 20, the contact area between the slip ring 10 and the elastic body 20 is reduced, and the strength of the slip ring 10 is ensured.

Further, the slip ring 10 is provided with a slot 15. The slot 15 is formed in an annular groove shape and surrounds the inner side wall of the slip ring 10, the cross section of the slot 15 is in a trapezoid shape, and two side walls of the slot 15 are gradually arranged in a close-approaching inclined manner from the slip ring 10 to the elastic body 20. In this embodiment, the slot 15 is disposed at a middle position of the slip ring 10 along the central axis direction thereof, and the slot 15 provides a space for avoiding the slip ring 10, thereby reducing friction between the slip ring 10 and the elastic body 20, reducing abrasion of the slip ring 10, and prolonging service life.

Further, the elastic body 20 includes a pressing portion 21 and an extending portion 22. The pressing part 21 is sleeved outside the slip ring 10, the pressing part 21 is of an annular structure, and the pressing part 21 is abutted against the slip ring 10; the extension portion 22 is disposed around the outside of the pressing portion 21, the outside of the pressing portion 21 abuts against an external member, and the elastic body 20 is used for pressing the slip ring 10, so as to prevent leakage of hydraulic oil. In this embodiment, the top pressing portion 21 is annular, the extending portion 22 is located at a middle position of the top pressing portion 21 along a central axis direction of the elastic body 20, the elastic body 20 is an integral piece, the extending portion 22 is disposed at the middle position of the top pressing portion 21, it is ensured that the pressure applied to the slip ring 10 by the elastic body 20 is more uniform, the sealing effect is improved, and the reliability of the elastic body 20 is improved by arranging the elastic body 20 as an integral piece.

Further, the pressing portion 21 has a width dimension B1 in the central axis direction of the elastic body 20, and the extending portion 22 has a width dimension B2 in the central axis direction of the elastic body 20; wherein B1 > B2. By B1 being larger than B2, the width of the pressing portion 21 in the central axis direction is made wider, so that the initial sealing stress to the slip ring 10 is improved, and the sealing performance between the elastic body 20 and the slip ring 10 is ensured. The extension 22 has smaller width and forms gaps at two sides, so that the volume ratio of the elastic body 20 is reduced, namely the same displacement amount, the elastic force generated by the extension 22 is smaller, and the friction force acting on the elastic body 20 and the slip ring 10 is further reduced, thereby further reducing the abrasion loss and prolonging the service life. Preferably, 0.6B1 is less than or equal to B2 is less than or equal to 0.8B1, and through a large number of experiments, the width dimension of the extension portion 22 is set to be 0.6 to 0.8 times of the width dimension of the pressing portion 21, so that the extension portion 22 can ensure that the pressing portion 21 is well supported, sufficient pressure between the elastic body 20 and the slip ring 10 is provided, meanwhile, leakage of hydraulic oil at the joint position of the elastic body 20 and the slip ring 10 is avoided, and the reliability of the joint between the elastic body 20 and the slip ring 10 is ensured.

The working process of the utility model is as follows: the rotary joint sealing element 100 is supported between two parts capable of rotating relatively, the sliding ring 10 and the elastic body 20 are respectively abutted against two parts outside, the two parts rotate to drive the sliding ring 10 and the elastic body 20 to rotate relatively, and the hydraulic oil inside the two parts can be normally transmitted through the abutting of the elastic body 20 to the sliding ring 10 and is not influenced by rotary motion.

In summary, embodiments of the present utility model provide a swivel joint seal 100, which has the following beneficial effects:

1. By arranging the annular groove 11 on the slip ring 10, the elastic body 20 is sleeved outside the slip ring 10 and seals the annular groove 11, so that the contact area between the slip ring 10 and the elastic body 20 is reduced, the friction force is reduced, the relative rotation abrasion loss between the slip ring 10 and the elastic body 20 is reduced, leakage is avoided, and the service life is prolonged.

2. Through offer fluting 15 on slip ring 10 inside wall, provide the space of keeping away of slip ring 10, improve the deformation volume of slip ring 10, and then reduce the frictional force between slip ring 10 and elastomer 20, further reduce pivoted wearing and tearing volume, increase of service life.

3. The width of the pressing portion 21 is larger than that of the extension portion 22, the pressing portion 21 is abutted against the slip ring 10, and the pressing portion 21 improves the compression amount of the abutting position of the elastic body 20 and the slip ring 10, so that the initial sealing stress on the slip ring 10 is improved, and the sealing performance is improved. And the volume of the elastic body 20 is reduced through the extension part 22, so that the volume ratio between the elastic body 20 and the empty space volume is reduced, the friction force in the rotating process of the slip ring 10 is reduced, the rotating abrasion loss is further reduced, and the service life is prolonged.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A swivel joint seal comprising:

2. The rotary joint seal of claim 1 wherein the slip ring and the elastomer are each in an annular configuration, the slip ring being collinear with a central axis of the elastomer.

3. The rotary joint seal according to claim 2, wherein the number of the ring grooves is at least two, and the ring grooves are arranged at intervals along the central axis direction of the slip ring.

4. The rotary joint seal according to claim 2, wherein the cross section of the ring groove is V-shaped, and side walls on both sides of the ring groove are inclined so as to gradually approach each other from the elastic body toward the inside of the slip ring.

5. The rotary joint seal of claim 1 wherein said slip ring is further provided with a slot; the grooving is annular groove-shaped and surrounds the inner side wall of the slip ring.

6. The rotary joint seal according to claim 5, wherein the cross section of the groove is trapezoidal, and both side walls of the groove are inclined so as to gradually approach each other from the slip ring toward the elastic body.

7. The swivel joint seal of claim 1 wherein the elastomer comprises a top pressure portion and an extension portion; the top pressure part is sleeved on the outer side of the slip ring and is abutted against the outer side wall of the slip ring, and the extension part is arranged on the outer side of the top pressure part in a surrounding mode.

8. The rotary joint seal according to claim 7, wherein a width dimension of the pressing portion in a direction of a central axis of the elastic body is B1, and a width dimension of the extending portion in a direction of a central axis of the elastic body is B2;

Wherein B1 > B2.

9. The swivel joint seal of claim 8 wherein 0.6B1 ∈b2 ∈ 0.8B1.

10. The rotary joint seal according to claim 7, wherein the pressing portion is annular, the extending portion is annular, and the extending portion is located at an intermediate position of the pressing portion in a central axis direction of the elastic body, and the elastic body is an integral piece.