CN215806252U

CN215806252U - U-shaped sealing ring for reciprocating piston

Info

Publication number: CN215806252U
Application number: CN202121429692.3U
Authority: CN
Inventors: 俞洋; 瞿建恩
Original assignee: Suzhou Meifului New Material Technology Co ltd
Current assignee: Suzhou Meifului New Material Technology Co ltd
Priority date: 2021-06-26
Filing date: 2021-06-26
Publication date: 2022-02-11
Anticipated expiration: 2031-06-26

Abstract

The utility model discloses a U-shaped sealing ring for a reciprocating piston, which comprises a sealing ring body, wherein a plurality of external spiral protrusions are arranged on the outer side surface of the sealing ring body, a plurality of waist-shaped protrusions are arranged on the bottom surface of the sealing ring body, an inner sealing lip and an outer sealing lip are arranged on the top surface of the sealing ring body, and a U-shaped groove is formed between the inner sealing lip and the outer sealing lip. The U-shaped sealing ring for the reciprocating piston is characterized in that a plurality of external spiral protrusions are arranged on the outer side surface of a sealing ring body, the external spiral protrusions reduce the contact area between the sealing ring and an external part, and the friction resistance of the sealing ring is reduced to a certain extent; when this U type sealing washer had the backpressure to produce, lubricating oil can get into lip mouth draining groove through draining groove and sealing washer medial surface, finally gets back to the intracavity, reaches the purpose of pressure release. In a word, this reciprocating motion is U type sealing washer structural design scientific and reasonable for piston, has reduced the frictional force of self, can form the draining passageway, is fit for using widely.

Description

U-shaped sealing ring for reciprocating piston

Technical Field

The utility model relates to the technical field of sealing rings, in particular to a U-shaped sealing ring for a reciprocating piston.

Background

In the prior art, the oil cylinder piston hole is sealed by independently designing and using a sealing ring with a U-shaped structure or independently designing and using a Glare ring with a rectangular structure.

The sealing ring of U-shaped structure is called U-shaped ring for short. The U-shaped ring is mostly made of polyurethane or nitrile rubber materials, and because the polyurethane or nitrile rubber materials have elasticity, and the sealing surface of the U-shaped ring is set into a lip, the lip expands under the action of pressure oil, the upper lip is tightly attached to the inner wall of the cylinder barrel of the oil cylinder, and the lower lip is tightly attached to the bottom diameter of the piston sealing groove, thereby playing the role of sealing oil. The U-shaped ring has the characteristic of good sealing performance in a medium and low pressure state.

The common U-shaped sealing ring has large friction force with peripheral parts, so that lubricating oil playing a lubricating role for the piston is not easy to pass around the sealing ring, and the lubricating effect on the piston is reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a U-shaped sealing ring for a reciprocating piston, which comprises a sealing ring body, wherein a plurality of external spiral protrusions are arranged on the outer side surface of the sealing ring body, a plurality of waist-shaped protrusions are arranged on the bottom surface of the sealing ring body, oil drainage grooves are formed between the adjacent waist-shaped protrusions, an inner sealing lip and an outer sealing lip are arranged on the top surface of the sealing ring body, a U-shaped groove is formed between the inner sealing lip and the outer sealing lip, a plurality of lip protrusions are arranged on the top of the inner sealing lip, and lip oil drainage grooves are formed between the adjacent lip protrusions.

Preferably, the seal ring body, the outer spiral bulge, the inner seal lip, the outer seal lip and the lip bulge are integrally formed.

Preferably, the height of the lip protrusion is 0.1-1 mm.

Preferably, the height of the waist-shaped protrusions is 0.1-1 mm.

The preferable material of the U-shaped sealing ring for the reciprocating piston is thermoplastic polyurethane elastomer rubber TPU or foam nitrile rubber NBR.

Preferably, the lip protrusions and the waist protrusions are the same in number.

Preferably, the number of the lip protrusions and the number of the waist-shaped protrusions are six respectively.

The utility model relates to a U-shaped sealing ring for a reciprocating piston, wherein a plurality of external spiral protrusions are arranged on the outer side surface of a sealing ring body, the external spiral protrusions reduce the contact area between the sealing ring and an external part, the friction resistance of the sealing ring is reduced to a certain extent, and the phenomenon that the original U-shaped sealing ring has abnormal sound at high pressure and low speed is also improved; the bottom surface of sealing washer body is equipped with a plurality of waist shape archs, forms the draining groove between the adjacent waist shape arch, and the top of interior seal lip is equipped with a plurality of lips arch, forms the lip draining groove between the adjacent lip arch, and when U type sealing washer had the backpressure to produce, lubricating oil can get into the lip draining groove through draining groove and sealing washer medial surface, finally gets back to the intracavity, reaches the purpose of pressure release. The U-shaped sealing ring for the reciprocating piston is made of thermoplastic polyurethane elastomer rubber TPU or foam nitrile rubber NBR, so that the sealing effect is improved, and the service life of the sealing ring is prolonged. In a word, this reciprocating motion is U type sealing washer structural design scientific and reasonable for piston, has reduced the frictional force of self, can form the draining passageway, is fit for using widely.

Drawings

FIG. 1 is a schematic structural view of a U-shaped seal ring for a reciprocating piston according to the present invention;

FIG. 2 is a cross-sectional view of a U-shaped seal ring for a reciprocating piston in accordance with the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

wherein: 1. a seal ring body; 2. an inner sealing lip; 3. an outer sealing lip; 4. an external spiral bulge; 5. a waist-shaped bulge; 6. an oil drainage groove; 7. the lip is convex; 8. a lip oil drainage groove; 9. a U-shaped groove.

Detailed Description

The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-3, a U-shaped seal ring for a reciprocating piston comprises a seal ring body 1, wherein a plurality of outer spiral protrusions 4 are arranged on the outer side surface of the seal ring body 1, a plurality of waist-shaped protrusions 5 are arranged on the bottom surface of the seal ring body 1, an oil drainage groove 6 is formed between the adjacent waist-shaped protrusions 5, an inner seal lip 2 and an outer seal lip 3 are arranged on the top surface of the seal ring body 1, a U-shaped groove 9 is formed between the inner seal lip 2 and the outer seal lip 3, a plurality of lip protrusions 7 are arranged on the top of the inner seal lip 2, a lip oil drainage groove 8 is formed between the adjacent lip protrusions 7, the seal ring body 1, the outer spiral protrusions 4, the inner seal lip 2, the outer seal lip 3 and the lip protrusions 7 are integrally formed, the height of the lip protrusions 7 is 0.5 mm, the height of the waist-shaped protrusions 5 is 0.5 mm, the U-shaped seal ring for the reciprocating piston is made of thermoplastic polyurethane elastomer rubber, the number of the lip protrusions 7 is the same as that of the waist-shaped protrusions 5, and the number of the lip protrusions 7 is six than that of the waist-shaped protrusions 5.

The utility model relates to a U-shaped sealing ring for a reciprocating piston, wherein a plurality of outer spiral protrusions 4 are arranged on the outer side surface of a sealing ring body 1, the outer spiral protrusions 4 reduce the contact area between the sealing ring and an external part, the friction resistance of the sealing ring is reduced to a certain extent, and the phenomenon that the original U-shaped sealing ring has abnormal sound at high pressure and low speed is also improved; the bottom surface of sealing washer body 1 is equipped with a plurality of waist shape archs 5, forms draining groove 6 between the adjacent waist shape arch 5, and the top of interior seal lip 2 is equipped with a plurality of lips arch 7, forms lip draining groove 8 between the adjacent lip arch 7, and when U type sealing washer had the backpressure to produce, lubricating oil can get into lip draining groove 8 through draining groove 6 and sealing washer medial surface, finally gets back to the intracavity, reaches the purpose of pressure release. The U-shaped sealing ring for the reciprocating piston is made of thermoplastic polyurethane elastomer rubber TPU or foam nitrile rubber NBR, so that the sealing effect is improved, and the service life of the sealing ring is prolonged. In a word, this reciprocating motion is U type sealing washer structural design scientific and reasonable for piston, has reduced the frictional force of self, can form the draining passageway, is fit for using widely.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a reciprocating motion is U type sealing washer for piston, includes sealing washer body (1), its characterized in that: the lateral surface of sealing washer body (1) is equipped with a plurality of outer spiral archs (4), the bottom surface of sealing washer body (1) is equipped with a plurality of waist shape arch (5), forms between the protruding (5) of adjacent waist shape draining groove (6), the top surface of sealing washer body (1) is equipped with interior seal lip (2) and external seal lip (3), form U type groove (9) between interior seal lip (2) and external seal lip (3), the top of interior seal lip (2) is equipped with a plurality of lip archs (7), forms lip draining groove (8) between the protruding (7) of adjacent lip.

2. A U-shaped seal ring for a reciprocating piston as defined in claim 1 wherein: the sealing ring is characterized in that the sealing ring body (1), the outer spiral protrusion (4), the inner sealing lip (2), the outer sealing lip (3) and the lip protrusion (7) are integrally formed.

3. A U-shaped seal ring for a reciprocating piston as defined in claim 1 wherein: the height of the lip bulge (7) is 0.1-1 mm.

4. A U-shaped seal ring for a reciprocating piston as defined in claim 1 wherein: the height of the waist-shaped bulge (5) is 0.1-1 mm.

5. A U-shaped seal ring for a reciprocating piston as defined in claim 1 wherein: the U-shaped sealing ring for the reciprocating piston is made of thermoplastic polyurethane elastomer rubber TPU or foam nitrile rubber NBR.

6. A U-shaped seal ring for a reciprocating piston as defined in claim 1 wherein: the lip bulges (7) and the waist-shaped bulges (5) have the same number.

7. A U-shaped seal ring for a reciprocating piston as defined in claim 1 wherein: the number of the lip bulges (7) and the waist-shaped bulges (5) is six respectively.