CN215806295U

CN215806295U - Novel buffering seal with elastic reinforcing function for hydraulic breaking hammer

Info

Publication number: CN215806295U
Application number: CN202122218078.9U
Authority: CN
Inventors: 杜杰; 杨琦
Original assignee: Yantai Runfuxiang Oil Seal Co ltd
Current assignee: Yantai Runfuxiang Oil Seal Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-11
Anticipated expiration: 2031-09-14

Abstract

The utility model relates to a novel buffer seal with an elastic reinforcing function for a hydraulic breaking hammer, which relates to the technical field of sealing elements and comprises a closed annular base body, wherein a circle of groove is arranged on the end surface of the base body facing to a high-pressure oil side, the end surface side is divided into a static seal lip arranged on an outer ring and a main seal lip arranged on an inner ring by the groove, a framework is arranged in the base body, and the framework extends from the static seal lip to the main seal lip. The novel buffer seal with the elastic reinforcing function for the hydraulic breaking hammer has the advantages of long service life and good sealing performance, can generate a stable oil film, and has a protection effect on a main seal.

Description

Novel buffering seal with elastic reinforcing function for hydraulic breaking hammer

Technical Field

The utility model relates to the technical field of sealing elements, in particular to a novel buffer seal with an elastic reinforcing function for a hydraulic breaking hammer.

Background

The hydraulic breaking hammer is called as 'breaking hammer' or 'breaker' for short, is installed on an excavator and a loader to break stones, rocks and the like, and is the main equipment for mining in the open-pit mining industry. The buffer seal is an important component of the hydraulic breaking hammer as a sealing element; the inner structure of the middle cylinder body is a hollow structure, the front end of the middle cylinder body is provided with a dustproof seal groove, a main oil seal groove and a buffer ring groove, and the dustproof seal groove, the main oil seal groove and the buffer ring groove are used for providing positions for sealing rings installed inside the middle cylinder body so as to seal oil in the middle cylinder body conveniently; and the piston in the middle cylinder body and the valve group act mutually, so that the hydraulic breaking hammer realizes striking operation.

The buffer seal has very important protection function for hydraulic equipment. The impact energy of large-scale hydraulic breaking hammer is big, and current buffering sealing performance is not enough: when the hammer works, the piston reciprocates to hammer the drill rod to generate vibration, the gap between the piston and the middle cylinder body is very small, and if the vibration exceeds the peak value of the gap, a piston ring in the buffer seal can be prematurely failed and broken or deformed to cause the strain of the main seal, so that the strain of the piston and the middle cylinder body is caused, and the normal work of the breaking hammer is influenced; if the sealing performance of the buffer seal exceeds that of the main seal, a lubricating oil film with a certain degree cannot be provided for the main seal in actual work, so that dry friction is generated between the main seal and the piston, iron cutting generated by premature failure of the main seal, piston galling and galling enters a power station, and the normal work of the breaking hammer is influenced. Secondly, the buffer sealed substrate is made of polyurethane, and because the polyurethane is processed by a reaction kettle in the synthesis process, the control of temperature and pressure is easy to deviate, so that the performance is different. In summary, the buffer seal used on the hydraulic breaking hammer at the present stage has the following problems: (1) the service life is short, and the reciprocating shaft cannot be protected so that the service life is prolonged; (2) the wear resistance is poor when the wear-resistant rubber is matched with a piston and is close to dry friction; (3) the performance of compression permanent deformation is high; (4) high performance materials are expensive and not easily purchased.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects in the prior art, the utility model provides a novel buffer seal with an elastic reinforcing function for a hydraulic breaking hammer.

The technical scheme is as follows: in order to achieve the purpose, the novel buffer seal with the elastic reinforcing function for the hydraulic breaking hammer comprises a closed annular base body, wherein a circle of groove is formed in the end face, facing the high-pressure oil side, of the base body, the end face side is divided into a static seal lip arranged on an outer ring and a main seal lip arranged on an inner ring through the groove, a framework is arranged in the base body, and the framework extends from the static seal lip to the main seal lip.

Preferably, the surface of the framework is provided with raised grains.

Preferably, the cross-sectional shape of the groove is the same as the cross-sectional shape of the skeleton.

Preferably, the cross-sectional profile of the groove and the cross-sectional profile of the skeleton are both parabolic.

Preferably, the base body and the framework are integrally formed in an injection molding mode.

Preferably, the framework is made of spring steel.

As a preferred scheme, the buffer seal is arranged on the end face side of the groove, a plurality of oil unloading areas are distributed, the oil unloading areas extend along the radial direction, and the oil unloading areas are distributed at intervals along the circumferential direction.

Preferably, the thickness of one end of the buffer seal is larger than that of the other end.

Preferably, the length of the static sealing lip is larger than that of the main sealing lip.

The novel buffer seal with the elastic reinforcing function for the hydraulic breaking hammer at least has the following technical effects:

(1) the service life is long, the main seal can be protected, a lubricating oil film is generated, and the service life is prolonged;

(2) the wear-resisting piston is matched with a piston, so that the wear-resisting performance is good;

(3) the performance of compression set is low;

(4) the internal framework is adopted, the required performance of the polyurethane is not high, and the performance of the whole is complemented.

Drawings

FIG. 1 is a schematic structural view of a conventional cushion seal;

FIG. 2 is a schematic view of the buffer seal of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic structural view of the framework of the present invention;

FIG. 5 is an enlarged view of the surface structure of the skeleton of the present invention.

In the figure, 1, a substrate; 2. a groove; 3. a static seal lip; 4. a primary seal lip; 5. a framework; 6. an oil unloading area; 7. buffering and sealing.

Detailed Description

The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-5, which are provided by way of example only to illustrate the present invention and not to limit the scope of the present invention.

A novel buffering seal with an elastic reinforcing function for a hydraulic breaking hammer comprises a base body 1, a static seal lip 3 and a main seal lip 4 which are integrally formed.

The substrate 1 is made of polyurethane material, and the substrate 1 is in a closed ring shape. The end face, facing the high-pressure oil side, of the base body 1 is provided with a circle of grooves 2, and the grooves 2 divide the end face side into a static seal lip 3 arranged on the outer ring and a main seal lip 4 arranged on the inner ring. Be provided with skeleton 5 through moulding plastics integrated into one piece ground in the base member 1, skeleton 5 extends to main seal lip 4 by quiet seal lip 3. Specifically, the cross-sectional shape of the groove 2 and the cross-sectional shape of the skeleton 5 are both parabolic. The inner surface and the outer surface of the framework 5 are respectively provided with raised grains. The framework 5 is made of spring steel and has good compression performance. The end face of the whole buffer seal 7 facing the high-pressure oil side is provided with a plurality of oil unloading areas 6, the oil unloading areas 6 are groove-shaped, and the oil unloading areas 6 extend from the main seal lip 4 to the static seal lip 3. And a plurality of oil unloading areas 6 are distributed at intervals along the circumferential direction. The thickness of the buffer seal 7 arranged on the end face side of the static seal lip 3 and the main seal lip 4 is larger than that of the other end face side, and the length of the static seal lip 3 is larger than that of the main seal lip 4.

The working principle of the utility model is as follows: the main sealing lip 4 is arranged at the right lower end of the base body 1, acts on the outer surface of the piston and plays a role in leakage prevention and the like; the static sealing lip 3 is positioned at the upper right end of the base body 1 and acts in a groove of the cylinder body to perform the first compression of the buffer seal 7. Skeleton 5 is located inside base member 1, because the surface of skeleton 5 is provided with the raised grain, can cooperate the compression of base member 1 in actual work, has strengthened elasticity, initial leakproofness and the intensity of base member 1. Under the high-frequency reciprocating motion, the main sealing lip 4 can be better attached to the surface of the piston. Through the wave texture design of 5 shapes of skeleton, at the during operation, partly fluid is given the separation by the sealing material of 5 low level departments of skeleton, and partly fluid passes through from the sealing material of 5 high level departments of skeleton, plays certain lubrication action to next one is sealed to make frictional force more steady, prolonged front end sealing system's life-span.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a hydraulic pressure quartering hammer is with novel take buffering of elasticity reinforcement function sealed which characterized in that: including being closed annular base member (1), be provided with round recess (2) on base member (1) the terminal surface towards the high pressure oil side, recess (2) divide into static seal lip (3) of arranging the outer lane in with main seal lip (4) of arranging the inner circle in with this terminal surface side, be provided with skeleton (5) in base member (1), skeleton (5) are extended to main seal lip (4) by static seal lip (3).

2. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the surface of the framework (5) is provided with wavy grains.

3. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the cross section of the groove (2) is the same as that of the framework (5).

4. The new buffer seal with elastic reinforcement function for hydraulic hammer as set forth in claim 3, wherein: the cross section of the groove (2) and the cross section of the framework (5) are parabolic.

5. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the base body (1) and the framework (5) are integrally formed in an injection molding mode.

6. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the framework (5) is made of spring steel.

7. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the buffer seal (7) is arranged on the end face side of the groove (2) and is provided with a plurality of oil unloading areas (6), the oil unloading areas (6) extend along the radial direction, and the oil unloading areas (6) are distributed at intervals along the circumferential direction.

8. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the thickness of one end of the buffer seal (7) is larger than that of the other end.

9. The hydraulic hammer of claim 1, wherein the buffer seal with elastic reinforcement function comprises: the length of the static sealing lip (3) is larger than that of the main sealing lip (4).