CN202719129U

CN202719129U - Multiple staggered sealing structure of piston

Info

Publication number: CN202719129U
Application number: CN 201220235856
Authority: CN
Inventors: 赵维; 李业
Original assignee: Zhongshan Yatai Machinery Industrial Co Ltd
Current assignee: Zhongshan Yatai Machinery Industrial Co Ltd
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2013-02-06
Anticipated expiration: 2022-05-18

Abstract

The utility model discloses a multiple staggered sealing structure of a piston. The multiple staggered sealing structure comprises a piston, wherein at least three open piston rings are overlapped and assembled between the inner wall of a piston cylinder and the piston; all the open piston rings are provided with openings; and the openings of the adjacent open piston rings are not adjacent to each other. The openings of the open piston rings guarantee that the open piston rings have sufficient flexibility under the thermal expansion and cold shrinkage state, so that the sealing of the piston is guaranteed at any time; and a multiple sealing effect is realized through a plurality of piston rings overlapped together, so that the sealing property is better, and the sealing effect is not affected by the openings.

Description

The multiple dislocation sealing configuration of a kind of piston

Technical field

The utility model relates to a kind of piston mechanism, particularly relates to the multiple dislocation sealing configuration of a kind of piston.

Background technique

Piston mechanism can produce to-and-fro motion by extraneous mechanical force or gas, fluid pressure, take with other transformation of energy as needed mechanical energy, for machinery; Piston mechanism is mainly by piston cylinder; sheathedly be matched with piston in the piston cylinder and relevant sealing; fixed structure forms; be applied in the piston mechanism of hot environment for some; expand with heat and contract with cold to realize piston movement with what utilize medium; and accordingly because of cold and hot variation; same meeting is so that certain expanding with heat and contract with cold appears in each structure; particularly for sealing configuration; expand with heat and contract with cold frequently and will certainly cause test to sealability; therefore in order to adapt to the cold and hot distortion of piston cylinder; usually can adopt the piston packing ring that possesses opening; so that seal ring can have certain stretchability, yet because the existence of opening just might cause piston cylinder to leak.

The model utility content

The technical problems to be solved in the utility model provides a kind of piston multi-sealing structure that can prevent effectively that piston cylinder from leaking.

The technological scheme that its technical problem that solves the utility model adopts is:

The multiple dislocation sealing configuration of a kind of piston comprises piston, and piston end periphery overlap assembly has at least three open piston rings, and this open piston ring all has opening, and wherein the opening of adjacent apertures piston ring is non-conterminous mutually.

The beneficial effects of the utility model: the utility model adopts open piston ring opening wherein to guarantee under the state of expanding with heat and contract with cold, open piston ring all has enough stretchabilities, guarantee at any time the sealing of piston, and a plurality of piston rings that overlap, mutually opening dislocation, to reach multi-sealed effect, so that better tightness, and so that opening can not affect sealing effect.

Description of drawings

In order to be illustrated more clearly in the technological scheme among the utility model embodiment, the accompanying drawing of required use was done simple declaration during the below will describe embodiment.Obviously, described accompanying drawing is a part of embodiment of the present utility model, rather than whole embodiment, and those skilled in the art can also be according to other design proposals and the accompanying drawing of these accompanying drawings acquisitions under the prerequisite of not paying creative work.

Fig. 1 is structural representation of the present utility model;

Fig. 2 is fractionation structural representation of the present utility model.

Embodiment

Be clearly and completely described below with reference to embodiment and the accompanying drawing technique effect to design of the present utility model, concrete structure and generation, to understand fully the purpose of this utility model, feature and effect.Obviously; described embodiment is a part of embodiment of the present utility model, rather than whole embodiment, based on embodiment of the present utility model; other embodiments that those skilled in the art obtains under the prerequisite of not paying creative work all belong to the scope that the utility model is protected.

With reference to Fig. 1, Fig. 2, the multiple dislocation sealing configuration of a kind of piston of the present utility model, comprise the piston 1 that carries out fore and aft motion, it is in piston structure, can be assemblied in the piston cylinder, owing to there being fore and aft motion between the two, so sealability between the two will be subject to than test, be directed to this, the utility model has at least three open piston rings 2 at the terminal periphery overlap assembly that piston 1 cooperates with piston cylinder, as seen in FIG., open piston ring 2 can be by the external pressure ring structure, is threaded or the outer press ring 3 that clamps connection press-fits fixing such as employing; This open piston ring 2 all has opening 21, so that open piston ring 2 does not form a complete annular, like this in its process of expansion and contraction, can maintain enough dilatabilities, and the cold and hot distortion to piston cylinder and piston 1 all has enough suitabilities, and because the existence of opening 21, meeting is so that may there be leakage problem in piston cylinder, therefore the utility model has adopted two kinds of means, one is with three or the 2 overlapping successively assemblings of above open piston ring, another is so that the opening 21 of the adjacent apertures piston ring 2 that is assembled together is non-conterminous mutually, be that each opening 21 is not beeline mutually, can't interconnect, so also be equivalent to adjacent open piston ring 2 with opening 21 sealings of previous open piston ring 2, final formation is multi-sealed, has also just solved by this leakage problem that opening 21 may exist.

In said structure, still conventional piston ring or pad can be set between adjacent open piston ring 2, mix use and reach more excellent effect.

Certainly, the invention is not limited to above-mentioned mode of execution, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of the utility model spirit, the modification that these are equal to or replacement all are included in the application's claim limited range.

Claims

1. multiple dislocation sealing configuration of piston, comprise piston (1), it is characterized in that: the terminal periphery overlap assembly of described piston (1) has at least three open piston rings (2), this open piston ring (2) all has opening (21), and wherein the opening (21) of adjacent apertures piston ring (2) is non-conterminous mutually.