CN110715053A - Multistage centrifugal circulation sealing washer - Google Patents

Abstract

The invention discloses a multi-stage centrifugal circulating sealing ring, comprising an outer ring and a sealing inner ring. The sealing inner ring is installed inside the outer ring to form a sealing ring. It is the inner reinforced densification convex ring, the middle reinforced densified convex ring and the outer reinforced densified convex ring. The back of the outer ring is provided with three layers of grooves from the inside to the outside, which are the inner reinforced sealing groove and the middle reinforced groove. The sealing groove and the outer layer reinforcement sealing groove, the outer layer reinforcement sealing groove is located just below the outer layer reinforcement densification convex ring, the middle layer reinforcement sealing groove is located directly below the middle layer reinforcement densification convex ring, the beneficial effect of the present invention Are: (1) full of elasticity and resilience; (2) appropriate mechanical strength, including expansion strength, elongation and tear strength. (3) The performance is stable, it is not easy to swell in the medium, and the thermal shrinkage effect (Joule effect) is small. (4) It is easy to process and form, and can maintain precise dimensions. (5) Does not corrode the contact surface, does not pollute the medium, etc.

Description

A kind of multistage centrifugal circulation sealing ring

technical field

The invention relates to a sealing valve, in particular to a multi-stage centrifugal circulating sealing ring.

Background technique

The existing sealing rings are as follows:

1. NBR nitrile rubber sealing ring: suitable for use in petroleum-based hydraulic oil, glycol-based hydraulic oil, diester-based lubricating oil, gasoline, water, silicone grease, silicone oil and other media. It is currently the most widely used and lowest cost rubber seal. Not suitable for use in polar solvents such as ketones, ozone, nitro hydrocarbons, MEK and chloroform. The general operating temperature range is -40~120 ℃.

2. HNBR hydrogenated nitrile rubber sealing ring: It has excellent corrosion resistance, tear resistance and compression deformation resistance, and has good ozone resistance, sunlight resistance and weather resistance. Better abrasion resistance than nitrile rubber. It is suitable for washing machinery, automobile engine system and refrigeration system using new environmentally friendly refrigerant R134a. Not recommended for use in alcohol, ester or aromatic solutions. The general operating temperature range is -40~150 ℃.

3. SIL silicone rubber sealing ring: It has excellent heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. Has good insulating properties. However, the tensile strength is poorer than that of general rubber and it does not have oil resistance. Suitable for household appliances such as electric water heaters, electric irons, microwave ovens, etc. It is also suitable for all kinds of supplies that have contact with the human body, such as kettles, water dispensers, etc. Not recommended for use in most concentrated solvents, oils, concentrated acids and sodium hydroxide. The general operating temperature range is -55~250 ℃.

4. VITON fluorine rubber sealing ring: The high temperature resistance is better than that of silicone rubber, and it has excellent weather resistance, ozone resistance and chemical resistance, but poor cold resistance. Resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils. Suitable for sealing needs of diesel engines, fuel systems and chemical plants. Not recommended for use with ketones, low molecular weight esters and nitrous-containing mixtures. The general operating temperature range is -20~250 ℃.

5. FLS fluorosilicone rubber sealing ring: Its performance has the advantages of fluoro rubber and silicone rubber, and it has good oil resistance, solvent resistance, fuel oil resistance and high and low temperature resistance. Resistant to oxygen-containing compounds, aromatic hydrocarbon-containing solvents and chlorine-containing solvents. Generally used for aviation, aerospace and military purposes. Exposure to ketones and brake fluid is not recommended. The general operating temperature range is -50~200 ℃.

The above-mentioned types of sealing rings have the following defects:

1. NBR nitrile rubber sealing ring is not suitable for polar solvents

2. HNBR hydrogenated nitrile rubber sealing ring is not suitable for use in alcohol, ester or aromatic solutions, and the general operating temperature range is -40~120 ℃

3. The tensile strength of SIL silicone rubber sealing ring is worse than that of general rubber and it has no oil resistance

4. VITON fluorine rubber sealing ring is not suitable for use in ketones, low molecular weight esters and nitrile mixtures

5. FLS fluorosilicone rubber sealing ring should not be exposed to ketones and brake oil for a long time.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a multi-stage centrifugal circulation sealing ring to solve the above-mentioned problems in the background art.

To achieve the above object, the present invention provides the following technical solutions:

A multi-stage centrifugal circulation sealing ring, comprising an outer ring and a sealing inner ring, the sealing inner ring is installed inside the outer ring to form a sealing ring, and the front of the outer ring is sequentially provided with three layers of convex rings from the inside to the outside, which are the inner layer reinforcement. The densification convex ring, the middle reinforced densified convex ring and the outer reinforced densified convex ring, the back of the outer ring is provided with three layers of grooves from the inside to the outside, namely the inner reinforced sealing groove, the middle reinforced sealing groove and the outer ring. The outer reinforced sealing groove is located directly under the outer reinforced densification convex ring, the middle reinforced sealing groove is located directly under the middle reinforced densified convex ring, and the inner reinforced sealing groove is located in the inner layer Reinforce just below the densifying bead.

As a further solution of the present invention: the outer ring is an embedded outer ring.

As a further solution of the present invention: the outer ring is made of stainless steel wire.

As a further solution of the present invention: the sealing inner ring is made of stainless steel wire.

As a further solution of the present invention: the outer ring is made of polytetrafluoroethylene.

As a further solution of the present invention: the sealing inner ring is made of metal rubber.

As a further solution of the present invention: the sealing inner ring is a component made of different wire diameters and densities.

Compared with the prior art, the beneficial effects of the present invention are: (1) rich elasticity and resilience; (2) appropriate mechanical strength, including expansion strength, elongation and tear strength. (3) The performance is stable, it is not easy to swell in the medium, and the thermal shrinkage effect (Joule effect) is small. (4) It is easy to process and form, and can maintain precise dimensions. (5) Does not corrode the contact surface, does not pollute the medium, etc.

Description of drawings

Figure 1 is a front view of the structure of the present invention.

FIG. 2 is a rear structure diagram of the present invention.

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

In the picture: 1-outer ring; 2-inner layer reinforced densification convex ring; 3-middle layer reinforced densification convex ring; 4-outer layer reinforced densification convex ring; 5-seal inner ring, 6-outer layer reinforced sealing concave Groove, 7 - Reinforced sealing groove in the middle layer, 8 - Reinforced sealing groove in the inner layer.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figures 1-3, Embodiment 1: In the embodiment of the present invention, a multi-stage centrifugal circulation sealing ring includes an outer ring 1 and a sealing inner ring 5, and the sealing inner ring 5 is installed inside the outer ring 1 to form a sealing ring , the front of the outer ring 1 is provided with three layers of convex rings from the inside to the outside, namely the inner layer reinforced densification convex ring 2, the middle layer reinforced densification convex ring 3 and the outer layer reinforced densification convex ring 4, the back of the outer ring 1 is There are three layers of grooves from the inside to the outside, namely the inner layer reinforcement sealing groove 8, the middle layer reinforcement sealing groove 7 and the outer layer reinforcement sealing groove 6, and the outer layer reinforcement sealing groove 6 is located in the outer layer reinforcement and densification convex. Right below the ring 4 , the middle layer reinforcement and sealing groove 7 is located directly below the middle layer reinforcement and densification convex ring 3 , and the inner layer reinforcement and sealing groove 8 is located directly under the inner layer reinforcement and densification convex ring 2 . Outer ring 1 is an embedded outer ring. The outer ring 1 is made of stainless steel wire. The sealing inner ring 5 is made of stainless steel wire. The outer ring 1 is made of Teflon. The sealing inner ring 5 is made of metal rubber. The sealing inner ring 5 is made of different wire diameters and densities.

Multistage centrifugal circulation sealing ring: made of stainless steel wire, does not contain any rubber components, and has strong use characteristics. For example: maintain normal work in high vacuum, high and low temperature, strong radiation, and various corrosive environments. The skin of the sealing ring can be made of different materials such as stainless steel, copper, PTFE and other materials according to the purpose. The sealing ring liner is made of different wire diameters and densities, and is suitable for different pressure occasions. The general use range is -80~800℃. But compared with the existing sealing ring, it has stronger performance and wider use environment.

Embodiment 2: On the basis of Embodiment 1, the present invention can also be used to seal the piston in the reciprocating hydraulic oil cylinder. Scope of application: TPU: general hydraulic cylinder, general equipment hydraulic cylinder. CPU: hydraulic cylinders for construction machinery and oil cylinders for high temperature and high pressure. Product hardness: HS85±2°A Working temperature: TPU: -40～+80℃ CPU: -40～+120℃ Working pressure: ≤32Mpa Various working media, such as hydraulic oil, emulsion, high temperature and low pressure water, etc.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A multi-stage centrifugal circulation sealing ring comprises an outer ring (1) and a sealing inner ring (5), the sealing ring is characterized in that the sealing inner ring (5) is arranged inside the outer ring (1) to form a sealing ring, three layers of convex rings are sequentially arranged on the front surface of the outer ring (1) from inside to outside, namely an inner layer reinforcing and densifying convex ring (2), a middle layer reinforcing and densifying convex ring (3) and an outer layer reinforcing and densifying convex ring (4), three layers of grooves are sequentially arranged on the back surface of the outer ring (1) from inside to outside, namely an inner layer reinforcing and densifying groove (8), a middle layer reinforcing and sealing groove (7) and an outer layer reinforcing and sealing groove (6), the outer layer reinforcing and sealing groove (6) is located under the outer layer reinforcing and densifying convex ring (4), the middle layer reinforcing and sealing groove (7) is located under the middle layer reinforcing and densifying convex ring (3), and the inner layer reinforcing and sealing groove (8) is located under the inner layer reinforcing and densifying convex ring (.

2. The multistage centrifugal circulation gasket according to claim 1, characterized in that the outer ring (1) is a snap-in outer ring.

3. The multistage centrifugal circulation gasket according to claim 1, characterized in that the outer ring (1) is made of stainless steel wire.

4. The multistage centrifugal circulation gasket according to claim 1, characterized in that the sealing inner ring (5) is made of stainless steel wire.

5. The multistage centrifugal circulation gasket according to claim 1, characterized in that the outer ring (1) is made of polytetrafluoroethylene.

6. The multistage centrifugal circulation gasket according to claim 1, characterized in that the sealing inner ring (5) is made of metal rubber.

7. A multistage centrifugal circulation seal ring according to claim 2, characterized in that the sealing inner ring (5) is a member made of different wire diameters, densities.

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