CN201517606U

CN201517606U - Piston ring

Info

Publication number: CN201517606U
Application number: CN2009200045628U
Authority: CN
Inventors: 赵日出
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-16
Filing date: 2009-02-16
Publication date: 2010-06-30
Anticipated expiration: 2019-02-16

Abstract

The utility model discloses a piston ring for keeping the airtightness, which consists of two same rings. Certain processing precision is formed on an upper plane and a lower plane which are stacked together for sealing and can stop an annular port on one side no matter the piston mover towards any direction; since each annular port takes a lapped shape, the piston ring has lapping effect and the sealing function by only ensuring that the lapping surface gap is not exposed out of an annular groove; in addition, the functions of the piston ring can be realized by only combining two piston rings together and taking an aboral shape; and since the lapping position is vary important, a lapping gap is preferably offset inwards.

Description

Piston ring

Affiliated technical field

The utility model is a kind of mechanical device that can keep cylinder pressurization ratio, a kind of piston ring that can effectively control gas blowby.

Background technique:

Present known piston ring all is that an annular groove is placed a piston ring, is subjected to heat expansion dead for preventing piston ring, and opening stays by an amount of gap, but along with the increase of wearing and tearing, opened gap also increases gradually, and air leak amount also increases thereupon.Build-up of pressure descends.

Summary of the invention:

In order to overcome the wearing and tearing of existing piston ring, opened gap increases the big problem of air leak amount, and the utility model provides a kind of piston ring, can effectively control gas-blowing phenomenon.

The scheme that the utility model is dealt with problems is: overlay in the annular groove with two identical piston rings of structure, and the inboard part of removing of gap-clearance of piston rings one end, a part is removed in the other end outside, make the piston ring two ends overlap suitable length mutually, and leave overlap joint gap and counterpart gap, so in use, the counterpart gap increases gradually, and the gap, position that can overlap changes little, owing to be that two piston rings are used, the opening end of two rings staggers mutually, no matter piston to which direction moves, opened gap is all blocked by the another ring like this, and gas can not directly be scurried out along casing wall, can only be by the gap of faying surface, thus air leak amount controlled.

Description of drawings

Below in conjunction with accompanying drawing present embodiment is further specified.

Fig. 1 is a schematic diagram of the present utility model.

The plan view of single piston ring of Fig. 2.

The plan view of single piston ring of Fig. 3.

Among Fig. 1: 1,2 piston ring, 3 pistons, 4 cylinder sleeves.

Embodiment

In the embodiment shown in fig. 1, be placed in the same groove by two identical piston rings of structure, and two gap-clearance of piston rings ends are staggered mutually.

In another embodiment shown in Figure 3, with the gap-clearance of piston rings end inboard and the outside, remove a part separately, two ends are overlapped mutually along ring.

Claims

1. piston ring, the piston ring of two same configuration, essential characteristic: be that they are contained in the same annular groove, two piston rings are stacked together, and are used in combination.

2. piston ring according to claim 1 is characterized in that the two ends of gap-clearance of piston rings reducing respective width separately, be exactly wherein an end inboard remove a corresponding part, a part is removed in the other end outside, and two ends can be overlapped.