CN211259652U

CN211259652U - Pneumatic swingable piston sealing structure

Info

Publication number: CN211259652U
Application number: CN201922164238.9U
Authority: CN
Inventors: 吴卿宝; 叶相石; 叶承阳; 吴松文
Original assignee: Wuxi Zongyang Pneumatic Manufacturing Co ltd
Current assignee: Wuxi Zongyang Pneumatic Manufacturing Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-08-14
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a pneumatic piston seal structure that can swing, its structure is including installing the piston in the piston cavity, establishes lip lamella shape sealing washer in the clearance between piston side and the piston cavity, and the guide bar is connected in the piston centre bore, is equipped with the clearance between piston and the guide bar. The utility model has the advantages that: the structure design is reasonable, the fixed lip valve-shaped sealing ring is adopted to support the piston and give enough freedom degree to the piston to play a sealing role, and the piston can be ensured to move flexibly and freely; the guide rod is adopted for guiding the piston to ensure the necessary movement direction; the high-linearity requirement of the proportional valve can be met, and the gap is arranged between the piston and the guide rod and is completely separated from the piston cavity, so that the freedom degree of the piston is large, the piston is in a swinging state, the motion of the piston is very flexible, the sealing is also reliable, and the requirement of the proportional valve can be completely met.

Description

Pneumatic swingable piston sealing structure

Technical Field

The utility model relates to a but pneumatics wobbling piston seal structure.

Background

In the proportional valve, a piston is an important part for realizing proportional output, and whether the motion of the piston is flexible or not is related to the output precision of the proportional valve, namely whether the linearity is good or not.

The piston in the proportional valve in the prior art is not flexible enough in movement due to structural design defects, and the structural requirements of the proportional valve cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model provides a but pneumatic oscillating piston seal structure, its purpose aims at overcoming the above-mentioned not enough that prior art exists, realizes improving the piston motion flexibility under the prerequisite of guaranteeing the leakproofness.

The technical solution of the utility model is as follows: the pneumatic swingable piston sealing structure structurally comprises a piston arranged in a piston cavity, a lip-shaped sealing ring is arranged in a gap between the side surface of the piston and the piston cavity, a guide rod is connected in a center hole of the piston, and a gap is formed between the piston and the guide rod.

Preferably, the fixed end of the lip-shaped sealing ring is arranged in a fixed hole on the inner wall of the piston cavity.

The utility model has the advantages that: the structure design is reasonable, the fixed lip valve-shaped sealing ring is adopted to support the piston and give enough freedom degree to the piston to play a sealing role, and the piston can be ensured to move flexibly and freely; the guide rod is adopted for guiding the piston to ensure the necessary movement direction; the high-linearity requirement of the proportional valve can be met, and the gap is arranged between the piston and the guide rod and is completely separated from the piston cavity, so that the freedom degree of the piston is large, the piston is in a swinging state, the motion of the piston is very flexible, the sealing is also reliable, and the requirement of the proportional valve can be completely met.

Drawings

Fig. 1 is a schematic structural view of the pneumatic swingable piston sealing structure of the present invention.

In the figure, 1 is a piston, 2 is a piston cavity, 3 is a lip seal, and 4 is a guide rod.

Detailed Description

The present invention will be described in further detail with reference to examples and embodiments.

As shown in figure 1, the pneumatic swingable piston sealing structure structurally comprises a piston 1 arranged in a piston cavity 2, a lip-shaped sealing ring 3 is arranged in a gap between the side surface of the piston 1 and the piston cavity 2, a guide rod 4 is connected in a central hole of the piston 1, and a gap is formed between the piston 1 and the guide rod 4.

The fixed end of the lip-shaped sealing ring 3 is arranged in a fixed hole on the inner wall of the piston cavity 2.

The fixed lip-shaped sealing ring 3 is adopted to support the piston 1 and give enough freedom degree to the piston 1, and the sealing function is also realized, so that the piston 1 is ensured to move flexibly and freely.

The use of the guide rod 4 for guiding the piston 1 ensures the necessary direction of movement.

All the above components are prior art, and those skilled in the art can use any model and existing design that can implement their corresponding functions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. Pneumatic piston seal structure that can sway, its structure is including installing piston (1) in piston chamber (2), characterized by piston (1) side and piston chamber (2) between the clearance establish lip lamella shape sealing washer (3), piston (1) centre bore in-connection guide bar (4), be equipped with the clearance between piston (1) and guide bar (4).

2. A pneumatic swingable piston seal structure according to claim 1, wherein the fixed end of said lip-shaped seal ring (3) is disposed in a fixed hole in the inner wall of the piston chamber (2).