CN214742743U

CN214742743U - Pressure relief bearing

Info

Publication number: CN214742743U
Application number: CN202120699573.3U
Authority: CN
Inventors: 张涛
Original assignee: Shanghai C&U Group Co Ltd; C&U Co Ltd
Current assignee: Shanghai C&U Group Co Ltd; C&U Co Ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-16
Anticipated expiration: 2031-04-06

Abstract

The utility model discloses a pressure relief bearing, including bearing inner race, the steel ball that sets up between bearing inner race and bearing outer race, the sealing member of setting between bearing inner race and bearing outer race, the sealing member is located the side of bearing inner race and bearing outer race, bearing inner race or/and bearing inner race are provided with the seal groove that is used for the installation sealing member of seting up along circumference, the sealing member closely laminates with the lateral wall on one side of the relative steel ball of seal groove, the inner space that bearing inner race and bearing outer race constitute forms confined space through the sealing member; the bearing outer ring is provided with a pressure discharge groove which is communicated to the external space from the sealing space. The utility model discloses a set up on the bearing and arrange the pressure that presses structure release bearing inside and avoid producing "collapse the lid" phenomenon.

Description

Pressure relief bearing

Technical Field

The utility model relates to the technical field of machinery, specifically be row's pressure bearing.

Background

With the development of the technology, the requirements on high temperature and high pressure performance are more and more special for different working occasions. Like the automobile industry, along with the appearance of operating mode requirements such as rotational speed, high temperature, bearing internal pressure also is higher and higher, so the bearing that can prevent to take place "the lid that collapses" phenomenon under the high-pressure internal environment of high temperature needs, current ordinary structure bearing often can't reach the requirement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a arrange and press bearing avoids producing "collapsing the lid" phenomenon through setting up the pressure that row presses structure release bearing inside on the bearing.

In order to achieve the above purpose, the utility model provides a following technical scheme: a pressure relief bearing comprises a bearing outer ring, a bearing inner ring, a steel ball arranged between the bearing outer ring and the bearing inner ring, and a sealing element arranged between the bearing outer ring and the bearing inner ring, wherein the sealing element is positioned at the side edges of the bearing outer ring and the bearing inner ring; and a pressure discharge groove is formed in the bearing outer ring and communicated to the external space from the sealing space.

As a further improvement, the pressure discharge groove is arranged in the sealing groove, and is formed by the side wall of the sealing groove relative to the steel ball and communicated with the outside by passing through the sealing groove after extending along the circumferential direction of the sealing groove.

As a further improvement of the present invention, one end of the sealing element, which is abutted against the bottom of the sealing groove, is circumferentially provided with a chamfer, the chamfer is located on one side of the sealing element opposite to the steel ball, the chamfer and the sealing groove form an annular space, the pressure discharge groove comprises an inlet groove and an outlet groove, the inlet groove is arranged on the side wall of the sealing groove facing the steel ball, the sealing space between the outer ring and the inner ring of the bearing is communicated with the annular space formed by the chamfer and the sealing element through the inlet groove, the outlet groove is arranged at the bottom of the sealing groove, and the annular space formed by the chamfer and the sealing element is communicated with the outside through the outlet groove; an included angle is formed between a connecting line of the outlet groove and the circle center of the bearing outer ring and a connecting line of the inlet groove and the circle center of the bearing outer ring.

As a further improvement of the utility model, the included angle between the line of the centre of a circle of export groove and bearing inner race and the line of the centre of a circle of import groove and bearing inner race is 90 at least.

As a further improvement of the utility model, the inlet groove and the outlet groove are provided with two sets, and are evenly distributed on the outer ring.

The beneficial effects of the utility model, it can realize sealing through the change of lubricating oil cooperation pressure to arrange the indent, consequently can not influence sealed space's sealed effect yet, has sealed and arrange the characteristics that the pressure has concurrently, has solved among the prior art and has appeared "collapsing the problem of lid" phenomenon under the high temperature easily.

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the bearing of the present invention;

FIG. 2 is a schematic view of the structure of the outer ring of the bearing of the present invention;

FIG. 3 is a schematic view of the cross-sectional side view of the outer race of the bearing of the present invention;

FIG. 4 is a schematic view of the operation of the inlet tank of the present invention;

fig. 5 is a schematic view of the operation of the outlet tank of the present invention.

Reference numerals: 1. a bearing outer race; 2. a bearing inner race; 3. a steel ball; 4. a seal member; 5. a sealing groove; 6. a pressure discharge groove; 61. an inlet tank; 62. an outlet tank; 7. and (6) chamfering.

Detailed Description

The present invention will be described in further detail with reference to embodiments shown in the drawings.

As shown with reference to figures 1-5,

a pressure relief bearing comprises a bearing outer ring 1, a bearing inner ring 2, a steel ball 3 arranged between the bearing outer ring 1 and the bearing inner ring 2, and a sealing element 4 arranged between the bearing outer ring 1 and the bearing inner ring 2, wherein the sealing element 4 is positioned at the side edges of the bearing outer ring 1 and the bearing inner ring 2, a sealing groove 5 for installing the sealing element 4 is arranged on the bearing outer ring 1 or/and the bearing inner ring 2 along the circumferential direction, the sealing element 4 is tightly attached to the side wall of the sealing groove 5, which is opposite to the steel ball 3, of one side, and a sealing space is formed by the inner space formed by the bearing outer ring 1 and the bearing inner ring 2 through the sealing element 4; the bearing outer ring 1 is provided with a pressure discharge groove 6, and the pressure discharge groove 6 is communicated to an external space from a sealed space.

Can constitute more confined seal space through sealing member 4 cooperation seal groove 5, sealed effect is better, and the seal space is through arranging indent 6 and exterior space intercommunication, the temperature rise in the seal space this moment, internal pressure increases, can let the lubricating oil in the seal space enter into row indent 6 through expend with heat and contract with cold's principle, simultaneously because the entering of lubricating oil, the air in arranging indent 6 can be followed the export and discharged, lubricating oil can be temporarily stored in arranging indent 6 simultaneously, and after the temperature descends, because the pressure decline in the seal space, can let the lubricating oil in arranging indent 6 get back to again in the seal space this moment. Because the pressure discharge groove 6 can realize sealing through the change of the lubricating oil matched pressure, the sealing effect of a sealing space cannot be influenced, the pressure discharge groove has the characteristics of sealing and pressure discharge, and the problem that the cover is easy to collapse at high temperature in the prior art is solved.

As one of the implementable options a, the pressure discharge groove 6 is disposed in the sealing groove 5, and the pressure discharge groove 6 is opened from a side wall of the sealing groove 5 opposite to the steel ball 3, and extends along the circumferential direction of the sealing groove 5 and then communicates with the outside by passing through the sealing groove 5.

This scheme is through extending row's indent 6 along circumference, can prolong the length of arranging indent 6, makes the pressure change of its adaptation bigger to can reduce the problem of lubricating oil seepage, utilize the cooperation of sealing member 4 with seal groove 5, can set up this row's indent 6 in the position of seal groove 5 with sealing member 4 in close contact with, utilize sealing member 4 to constitute full enclosure structure this moment, make the flow of lubricating oil more stable. Due to the design of the sealing groove 5 and the sealing element 4, the dustproof effect is better when the sealing groove and the sealing element are matched with each other, and the outlet of the pressure discharge groove 6 for air outlet does not need too large space, so that a better dustproof scheme can be designed.

As another scheme B, a chamfer 7 is circumferentially arranged at one end of the sealing element 4, which is abutted against the bottom of the sealing groove 5, the chamfer 7 is positioned at one side of the sealing element 4 opposite to the steel ball 3, the chamfer 7 and the sealing groove 5 form an annular space, the pressure discharge groove 6 comprises an inlet groove 61 and an outlet groove 62, the inlet groove 61 is arranged on the side wall of the sealing groove 5 facing the steel ball 3, the sealing space between the bearing outer ring 1 and the bearing inner ring 2 is communicated with the annular space formed by the chamfer 7 and the sealing element 4 through the inlet groove 61, the outlet groove 62 is arranged at the bottom of the sealing groove 5, and the annular space formed by the chamfer 7 and the sealing element 4 is communicated with the outside through the outlet groove 62; an included angle is formed between a connecting line of the outlet groove 62 and the circle center of the bearing outer ring 1 and a connecting line of the inlet groove 61 and the circle center of the bearing outer ring 1.

The scheme is different from the scheme A, the working principle is as follows, when the pressure in the sealing space is increased, lubricating oil enters the inlet groove 61 through thermal expansion, and enters the annular space formed by the chamfer 7 and the sealing groove 5 through the inlet groove 61, the annular space can be used as an oil path for filling the lubricating oil, meanwhile, air in the annular space is discharged through the outlet groove 62, the outlet groove 62 is positioned at the bottom of the sealing groove 5, the design of the outlet groove 62 at the moment that the sealing element 4 is in close contact with the bottom of the sealing groove 5 does not cause too large influence on the sealing effect, and the better dustproof and sealing effects can be kept. By designing the size of the included angle between the connecting line of the circle centers of the outlet groove 62 and the bearing outer ring 1 and the connecting line of the circle centers of the inlet groove 61 and the bearing outer ring 1, the length of the oil path can be changed, and different requirements can be met.

Preferably, the angle between the line connecting the outlet groove 62 and the center of the bearing cup 1 and the line connecting the inlet groove 61 and the center of the bearing cup 1 is at least 90 °. The length of the oil way is moderate by selecting the included angle of more than or equal to 90 degrees, and the leakage of lubricating oil can be effectively avoided.

As a further alternative, in order to improve the pressure discharge efficiency and maintain a good sealing effect, the inlet grooves 61 and the outlet grooves 62 are provided in two sets and are uniformly distributed on the outer ring.

The design of two sets of import grooves 61 and export groove 62 can directly arrange through two when arranging the pressure and press, arrange that the pressure is imitated more, further prevent to arrange under the untimely condition of pressure, appear collapsing and cover the phenomenon. It is worth mentioning that in this embodiment, the angle needs to be less than 180 °. The design of evenly distributed can let the effect of row's pressure more even, lets efficiency higher.

In fact, in the above embodiments, the inlet groove 61, the outlet groove 62, the sealing element 4, and the sealing groove 5 may be disposed in the bearing inner ring 2, and the two are not very different in practice and belong to the same technology, so the bearing outer ring 1 and the bearing inner ring 2 in the present embodiment are not limited to these components.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A pressure relief bearing comprises a bearing outer ring, a bearing inner ring, a steel ball arranged between the bearing outer ring and the bearing inner ring, and a sealing element arranged between the bearing outer ring and the bearing inner ring, wherein the sealing element is positioned at the side edges of the bearing outer ring and the bearing inner ring; and a pressure discharge groove is formed in the bearing outer ring and communicated to the external space from the sealing space.

2. The pressure relief bearing according to claim 1, wherein the pressure relief groove is formed in the sealing groove, and the pressure relief groove is formed in a side wall of the sealing groove opposite to the steel ball, extends in the circumferential direction of the sealing groove, and is communicated with the outside by penetrating through the sealing groove.

3. The pressure relief bearing according to claim 1, wherein an end of the sealing member abutting against the bottom of the sealing groove is circumferentially provided with a chamfer at a side of the sealing member opposite to the steel ball, the chamfer and the sealing groove form an annular space, the pressure relief groove comprises an inlet groove and an outlet groove, the inlet groove is formed in a side wall of the sealing groove facing the steel ball, the sealing space between the outer ring and the inner ring of the bearing is communicated with the annular space formed by the chamfer and the sealing member through the inlet groove, the outlet groove is formed in the bottom of the sealing groove, and the annular space formed by the chamfer and the sealing member is communicated with the outside through the outlet groove; an included angle is formed between a connecting line of the outlet groove and the circle center of the bearing outer ring and a connecting line of the inlet groove and the circle center of the bearing outer ring.

4. A dump bearing according to claim 3, wherein the angle between a line joining the outlet groove to the centre of the outer race and a line joining the inlet groove to the centre of the outer race is at least 90 °.

5. The displacement bearing of claim 4, wherein the inlet grooves and the outlet grooves are arranged in two groups and are evenly distributed on the outer ring.