CN211574244U

CN211574244U - Pressure balance's combination formula sealing washer

Info

Publication number: CN211574244U
Application number: CN202020083412.7U
Authority: CN
Inventors: 王永平; 李安虎; 石翠
Original assignee: Shandong Anlan Electronics Co ltd; Shandong Yuanxing Electronics Co ltd
Current assignee: Shandong Anlan Electronics Co ltd; Shandong Yuanxing Electronics Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-09-25
Anticipated expiration: 2030-01-15

Abstract

A combined sealing ring with balanced pressure belongs to the technical field of sealing rings. The method is characterized in that: the elastic ring comprises an elastic ring (1) and a support ring (3), wherein the support ring (3) is sleeved in the elastic ring (1) to play a supporting role, the upper end surface and the lower end surface of the elastic ring (1) are respectively attached to the upper end surface and the lower end surface of the support ring (3), a cavity is formed between the end surface of the elastic ring (1) and the ring surface of the support ring (3) at intervals, and a balance channel (4) for communicating the inner ring surface and the outer ring surface of the support ring (3) is arranged on the support ring (3). In this pressure balance's combined type sealing washer, through set up the balanced passageway of connecting its inside and outside annular on the support ring, when this pressure balance's combined type sealing washer is in the great environment of temperature difference change, the pressure difference that produces in the cavity difference in temperature between support ring and the elastic ring can realize pressure balance through between balanced passageway and the outside atmosphere, prevents effectively that the sealing washer from taking place deformation because of the pressure differential, has guaranteed sealed effect.

Description

Pressure balance's combination formula sealing washer

Technical Field

A combined sealing ring with balanced pressure belongs to the technical field of sealing rings.

Background

The sealing ring is the most common sealing element in the prior art, and is generally made of elastic materials, and the elasticity of the sealing ring is utilized for sealing. The following defects generally exist when the sealing ring is used: when the external temperature changes greatly, the gas inside the sealing cavity sealed by the sealing ring can change in pressure due to expansion with heat and contraction with cold, so that pressure difference is formed between the pressure in the sealing ring and the external atmospheric pressure, the pressure difference can lead to the whole deformation of the sealing ring, and the sealing effect can be seriously influenced.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, and the combined sealing ring capable of balancing internal pressure and external pressure is provided.

The utility model provides a technical scheme that its technical problem adopted is: this pressure balance's combination formula sealing washer, its characterized in that: the elastic ring comprises an elastic ring and a support ring, wherein the support ring is sleeved in the elastic ring to play a supporting role, the upper end surface and the lower end surface of the elastic ring are respectively attached to the upper end surface and the lower end surface of the support ring, a cavity is formed between the side surface of the elastic ring and the ring surface of the support ring at intervals, and a balance channel communicated with the inner ring surface and the outer ring surface of the support ring is arranged on the support ring.

Preferably, the support ring is provided with a positioning groove on two side faces contacting with the elastic ring, and the elastic ring is provided with an elastic bulge at a position corresponding to the positioning groove.

Preferably, the support ring is made of a hard material.

Preferably, the side surface of the elastic ring is provided with a wavy expansion ring.

Preferably, the support ring is split and is formed by vertically butting two support ring monomers.

Preferably, a clamping table is arranged on the butt joint surface of the two support ring monomers, and a groove is arranged on the side part of the clamping table.

Preferably, a circulation gap is formed between the two support ring monomers, and balancing channels communicated with the circulation gap are respectively formed on the two support ring monomers.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

1. in the combined sealing ring with balanced pressure, a balance channel for connecting the inner and outer ring surfaces of the supporting ring is arranged on the supporting ring, and a cavity formed between the supporting ring and the elastic ring is communicated with the outside atmosphere through the balance channel. When this pressure balance's combination formula sealing washer is in the great environment of difference in temperature change, the pressure difference that produces can realize pressure balance between balanced passageway and the outside atmosphere through the difference in temperature in the cavity between support ring and the elastic ring, prevents effectively that the upper seal circle from taking place deformation because of the pressure difference, has guaranteed sealed effect.

2. The locating grooves are formed in the two side faces, in contact with the elastic ring, of the support ring, the elastic protrusions are formed in the positions, corresponding to the locating grooves, of the elastic ring, and after the support ring is placed into the elastic ring, the elastic protrusions enter the locating grooves, so that the support ring and the elastic ring are effectively prevented from moving in the lateral direction in the use process of the combined sealing ring.

3. By providing the telescopic ring, sufficient buffer space is provided for the seal cavity.

4. When the support rings are designed in a split mode, the clamping table and the clamping groove between the two support ring monomers are designed to ensure that the two support ring monomers cannot shift, and a circulation gap is formed between the two support ring monomers at intervals.

Drawings

Fig. 1 is a sectional view of an embodiment 1 of a pressure-balanced composite seal ring.

Fig. 2 is a schematic installation diagram of embodiment 1 of the combined sealing ring with pressure balance.

Fig. 3 is a sectional view of embodiment 2 of the combined sealing ring with pressure balance.

Fig. 4 is a sectional view of embodiment 3 of the combined seal ring with pressure balance.

Wherein: 1. the elastic ring 2, the elastic bulge 3, the support ring 4, the balance channel 5, the telescopic ring 6, the sealing cavity 7, the upper cover 8, the lower cover 9 and the clamping table.

Detailed Description

Fig. 1 to 2 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 4.

Example 1:

as shown in fig. 1, a pressure balanced combined seal ring (hereinafter referred to as a combined seal ring) includes an elastic ring 1 and a support ring 3, a groove is disposed on a side surface of the elastic ring 1, the support ring 3 is placed into the elastic ring 1 from an opening of the groove, and upper and lower support surfaces of the support ring 3 are flush with two side surfaces of the groove on the side of the elastic ring 1, in this embodiment, the opening of the groove of the elastic ring 1 faces outward, and the support ring 3 is placed in from the outer side of the elastic ring 1.

The support ring 3 is made of hard material, and after the support ring 3 is placed in the elastic ring 1, the end surface of the elastic ring 1 opposite to the inner side surface of the support ring 3 is a wavy expansion ring 5. Inside the telescopic ring 5 is a sealed cavity 6 (a cavity which needs to be sealed and isolated from the outside).

The positioning grooves are formed on the two side surfaces of the support ring 3, which are in contact with the elastic ring 1, the elastic bulges 2 are formed at the positions of the elastic ring 1, which correspond to the positioning grooves, and after the support ring 3 is sleeved into the elastic ring 1, the elastic bulges 2 enter the positioning grooves, so that the support ring 3 and the elastic ring 1 are effectively prevented from shifting in the lateral direction in the use process of the combined sealing ring.

A balance channel 4 is arranged on the support ring 3 along the lateral direction of the combined seal ring, and two ends of the balance channel 4 are communicated with the inner side and the outer side of the support ring 3, so that a cavity formed between the outer side of the telescopic ring 5 and the inner side of the support ring 3 is communicated with the outside through the balance channel 4. The equalization channel 4 can be implemented in any form: such as air (water) permeable holes, air (water) permeable channels, etc., the balance channel 4 may be opened one or more than one.

The specific working process and working principle are as follows:

referring to fig. 2, the combined sealing ring of the present application is described as an example of a container including an upper cap 7 and a lower cap 8, and the combined sealing ring of the present application is first placed between the upper cap 7 and the lower cap 8, and then the upper cap 7 and the lower cap 8 are screwed (not shown in the drawing) by conventional means (e.g., threads).

Along with constantly compressing tightly between upper cover 7 and the lower cover 8, upper cover 7 and lower cover 8 press respectively at the upper and lower terminal surface of support ring 3 to compress tightly the elastic ring 1 that is located the upper and lower terminal surface of support ring 3, realize sealed chamber 6 and external sealed through the extrusion to elastic ring 1, play sealed effect to the inside of container.

When the container was in the great environment of temperature difference change, the pressure in the seal chamber 6 can change because of the difference in temperature, in case 6 internal pressure in seal chamber and external environment have the pressure differential when, the pressure differential can drive expansion ring 5 and take place deformation, and the air current that appears because of expansion ring 5 takes place deformation can flow through balanced passageway 4, has consequently realized the pressure balance of this combination formula sealing washer. The expansion ring 5 is designed into a wave shape, so that the deformation of the expansion ring 5 is effectively increased, and a sufficient buffer space is provided for the seal cavity 6.

Example 2:

this example differs from example 1 in that: as shown in fig. 3, in the present embodiment, the support ring 3 is a split type, and the support ring 3 includes two support ring units with similar shapes and different thicknesses. When the support ring 3 is formed, the two support ring monomers are sleeved together and then butted up and down to form the support ring 3.

The top of the combined end face of the support ring monomers is provided with a clamping table 9, the side part of the clamping table 9 is provided with a clamping groove, and when the two support ring monomers are butted up and down, the clamping table 9 of one support ring monomer is clamped in the clamping groove of the other support ring monomer. The design of the clamping table 9 and the clamping groove between the two support ring monomers ensures that lateral displacement cannot occur between the two support ring monomers, and ensures that a circulation gap is formed between the two support ring monomers at intervals.

The two support ring monomers are respectively provided with a balance channel 4, the two balance channels 4 are respectively communicated with the circulation gap between the two support ring monomers, and therefore the two balance channels 4 and the circulation gap jointly form a channel for communicating the inner ring and the outer ring of the support ring 3.

The working process and principle of this embodiment are the same as those of embodiment 1, and are not described herein again.

Example 3:

this example differs from example 1 in that: in the present embodiment, as shown in fig. 4, the opening of the groove of the elastic ring 1 faces the inside, while the telescopic ring 5 is located at the outside, and the support ring 3 is inserted from the inside of the elastic ring 1. The working process and principle of this embodiment are the same as those of embodiment 1, and are not described herein again.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a pressure balance's combination formula sealing washer which characterized in that: the elastic ring comprises an elastic ring (1) and a support ring (3), wherein the support ring (3) is sleeved in the elastic ring (1) to play a supporting role, the upper end surface and the lower end surface of the elastic ring (1) are respectively attached to the upper end surface and the lower end surface of the support ring (3), a cavity is formed between the side surface of the elastic ring (1) and the ring surface of the support ring (3) at intervals, and a balance channel (4) for communicating the inner ring surface and the outer ring surface of the support ring (3) is arranged on the support ring (3).

2. The pressure balanced composite seal ring of claim 1, wherein: the two side faces of the support ring (3) contacting with the elastic ring (1) are provided with positioning grooves, and elastic bulges (2) are arranged at the positions of the elastic ring (1) corresponding to the positioning grooves.

3. The pressure balanced composite seal ring of claim 1, wherein: the support ring (3) is made of hard material.

4. The pressure balanced composite seal ring of claim 1, wherein: the side surface of the elastic ring (1) is a wavy expansion ring (5).

5. A pressure balanced composite seal ring according to any one of claims 1 to 3 wherein: the support ring (3) is split and is formed by vertically butting two support ring monomers.

6. The pressure balanced composite seal ring of claim 5, wherein: the butt joint surfaces of the two support ring monomers are provided with clamping tables (9), and the side parts of the clamping tables (9) are provided with grooves.

7. The pressure balanced composite seal ring of claim 5, wherein: a circulation gap is formed between the two support ring monomers, and balance channels (4) communicated with the circulation gap are respectively arranged on the two support ring monomers.