阅读说明：本技术 一种易更换低摩擦的往复式运动结构 (Reciprocating motion structure with low friction and easy replacement ) 是由 顾振军 郝宏达 陈文鑫 董霞 张国锋 张娜 范相辉 王军刚 张建宝 陆钰珍 蒋亚 于 2020-12-25 设计创作，主要内容包括：一种易更换低摩擦的往复式运动结构,活塞端面外缘处安装支撑圈,支撑圈外侧由挡板的一端顶住,而挡板的另一端可拆卸安装到活塞上；且挡板和活塞之间留有间隙。支撑圈上端面与活塞上端面间留有高度差。本发明采用螺钉将支撑圈可拆卸地安装在活塞上,解决了往复式运动活塞摩擦垫摩擦力较大,难以拆卸的问题,同时对于活塞频繁的往复式运动,解决了其密封问题。而且安装方便简易,减少零件加工工序,降低相对运动间摩擦力,有效降低生产成本。(A reciprocating motion structure with easy replacement and low friction is characterized in that a support ring is arranged at the outer edge of the end face of a piston, the outer side of the support ring is propped against one end of a baffle, and the other end of the baffle is detachably arranged on the piston; and a gap is left between the baffle plate and the piston. A height difference is reserved between the upper end face of the support ring and the upper end face of the piston. The support ring is detachably arranged on the piston by adopting the screw, so that the problems that the friction force of a friction pad of the reciprocating piston is large and the piston is difficult to detach are solved, and the sealing problem of the piston caused by frequent reciprocating motion is solved. And the installation is convenient and simple, the part processing procedures are reduced, the friction force between relative movements is reduced, and the production cost is effectively reduced.)

1. A reciprocating motion structure with easy replacement and low friction is characterized in that a support ring (3) is arranged at the outer edge of the end face of a piston (6), the outer side of the support ring (3) is propped against one end of a baffle (2), and the other end of the baffle (2) is detachably arranged on the piston (6); and a gap is reserved between the baffle (2) and the piston (6).

2. An easily replaceable low friction reciprocating motion structure according to claim 1, characterized in that a height difference is left between the upper end surface of the support ring (3) and the upper end surface of the piston (6).

3. An easily replaceable low friction reciprocating motion structure according to claim 1 or 2, characterized in that the support ring (3) is made of low friction brass and its surface is embedded with flexible graphite.

4. An easily replaceable low friction reciprocating motion structure according to claim 1, characterized in that the piston (6) inside the support ring (3) is provided with an O-ring (4), and the two ends of the O-ring (4) are provided with baffle rings (5).

Technical Field

The invention belongs to the field of general mechanical equipment, and particularly relates to a low-friction reciprocating motion structure easy to replace.

Background

The supporting structure of the piston in the reciprocating motion structure is a very critical part, the overall performance of the motion of the valve can be influenced if the structural design is unreasonable, and particularly, the structural design of the piston supporting ring requires low friction and is easy to replace.

In general, a reciprocating piston is provided with a friction pad which is directly embedded in a groove of the piston, the friction pad deforms due to frequent movement and extrusion, and once a problem occurs and maintenance is needed, the friction pad is difficult to take out of the groove, so that great difficulty is caused to maintenance personnel; the piston is generally sealed by adopting an O-shaped ring, however, the O-shaped ring is extruded and cut by the edge of the groove to be damaged due to frequent reciprocating motion and large impact force of the piston, so that the sealing effect is lost. Therefore, it is still imperative to optimize such reciprocating piston structures.

Disclosure of Invention

The invention provides a reciprocating motion structure with low friction and easy replacement, and solves the problems that a friction pad of a reciprocating motion piston has large friction and is difficult to disassemble.

The technical scheme adopted by the invention is as follows:

a reciprocating motion structure with easy replacement and low friction is characterized in that a support ring is arranged at the outer edge of the end face of a piston, the outer side of the support ring is propped against one end of a baffle, and the other end of the baffle is detachably arranged on the piston; and a gap is left between the baffle plate and the piston.

A height difference is reserved between the upper end face of the support ring and the upper end face of the piston.

The support ring is made of a low-friction brass material, and flexible graphite is inlaid in the surface of the support ring.

And an O-shaped ring is arranged on the piston at the inner side of the support ring, and two ends of the O-shaped ring are provided with baffle rings.

The support ring is detachably arranged on the piston by adopting the screw, so that the problems that the friction force of a friction pad of the reciprocating piston is large and the piston is difficult to detach are solved, and the sealing problem of the piston caused by frequent reciprocating motion is solved. And the installation is convenient and simple, the part processing procedures are reduced, the friction force between relative movements is reduced, and the production cost is effectively reduced.

The invention is widely applied to various industrial fields such as petroleum, chemical industry, aerospace, ships, electric power, metallurgy and the like, and plays a vital role.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the invention with a gap between the baffle and the piston;

FIG. 3 is an expanded view of the support ring of the present invention;

FIG. 4 is a schematic view of the height difference between the support ring and the piston of the present invention;

fig. 5 is a complete installation schematic of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, in an easily replaceable low-friction reciprocating motion structure, a support ring 3 is arranged at the outer edge of the end face of a piston 6, the outer side of the support ring 3 is supported by one end of a baffle plate 2, and the other end of the baffle plate 2 is detachably arranged on the piston 6 through a screw 1; and a gap is reserved between the baffle 2 and the piston 6, and the gap can realize the application of the pretightening force of the support ring. The pretightening force is adjusted through the screws 1, so that the baffle 2 uniformly compresses the support ring 3, and the support ring 3 is prevented from shaking in the groove of the piston 6 or bending and protruding due to overlarge stress when the piston 6 reciprocates.

A height difference is reserved between the support ring 3 and the piston 6, and a gap is reserved between the upper end face of the piston 6 and the outer wall to ensure that the end face of the support ring 3 is always in close contact with the outer wall.

Referring to fig. 3, the support ring 3 is made of low-friction brass, and has a small pit on the surface, and flexible graphite is embedded in the pit and has a self-lubricating effect.

Referring to fig. 4, an O-ring 4 is installed on a piston 6 inside the support ring 3, and two ends of the O-ring 4 are provided with a baffle ring 5. The heights of the O-shaped ring 4 and the baffle ring 5 are consistent with the height of the support ring 3. The O-ring 4 acts as a seal and the purpose of the stop ring 5 is to prevent the O-ring 4 from being squeezed into the gap and to increase the pressure the stop ring can withstand to the O-ring 4.