CN201539554U

CN201539554U - Piston ring without oil

Info

Publication number: CN201539554U
Application number: CN2009202565345U
Authority: CN
Inventors: 顾晓勇; 顾晓宁; 顾余舜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-13
Filing date: 2009-11-13
Publication date: 2010-08-04
Anticipated expiration: 2019-11-13

Abstract

The utility model relates to a piston ring without oil, wherein the main body is in ring shaped structure, and the piston ring is characterized in that a S-shaped cut opening in plane for breaking is provided on the annular surface of the ring shaped structure. The piston ring is used in double pieces, have simple structure, great sealing effect, and is beneficial for reducing leakage, improve working efficiency of the non-oil machine, and reduces energy consumption.

Description

There is not oily piston ring

Technical field

The utility model relates to a kind of piston ring, the piston ring that uses in especially a kind of oilless compressor, specifically a kind of no oily piston ring.

Background technique

As everyone knows, do not have oily piston air compressor, do not contain Residual oil, can not pollute the product composition Residual oil owing to export gas, therefore, more and more wider in sector applications such as medicine, food, electronics, biologic products.Must use no oily piston ring in no oily piston air compressor, and the material that does not have an oily piston ring usually adopts the nonmetallic material with self-lubricating property, as filled polytetrafluoroethylene etc., its thermal linear expansion coefficient is bigger about 10 times than metallic material.Therefore, the otch end-gaps that does not have oily piston ring must design greatlyyer, so will cause cold conditions seriously to be leaked.In addition, the abrasion speed of nonmetallic ring is much larger than metal ring, and it is also increasing not have the hot end-gaps in oily piston ring abrasion back, and further causing leaking increases, and gas production descends.Fig. 1,2 and Fig. 3, the 4th, the structure of two kinds of at present common no oily piston rings, Fig. 1,2 is depicted as the radially no oil ring of angular cut structure, and every groove is adorned 2 during use.Fig. 3,4 is depicted as radially S shaped incision, and every groove is adorned 1.Piston ring shown in Fig. 1,2 is if every groove is adorned 1, then axially, radially end-gaps is all unimpeded; If every groove is adorned two, stagger 180 ° and then only can block axial end-gaps, and radially end-gaps can not be blocked.The every groove dress of piston ring shown in Fig. 3,4 a slice can block axial end-gaps leakage way, and radially end-gaps can not be blocked.Therefore, no oil ring (shown in Fig. 1,2,3,4) end-gaps size commonly used at present directly influences leakage rate, and with the abrasion of ring, end-gaps is increasing, leaks also more and more serious.Therefore people wish to design a kind of no oil ring, and directly influence or influence are very not little to leakage rate in the variation of its end-gaps, thereby improve the life-span of no oily piston ring and the working efficiency of no oily machine.

Summary of the invention

The purpose of this utility model is can't eliminate end-gaps and along with the increase end-gaps of wear extent is increasing at the existing piston ring, make leakage rate increasing, have a strong impact on the problem of compressor operating efficient, the variation that designs a kind of end-gaps does not directly influence leakage rate or the nothing oil piston ring very little to the leakage rate influence.

The technical solution of the utility model is:

A kind of no oily piston ring, its main body is structure in the form of a ring, has the planar S shape otch with its disconnection on the anchor ring of the described ring structure of its feature.Adorn two rings in each piston ring groove in use simultaneously, the S shaped incisions of two rings circumferentially and on the direction are all staggering 180 °.Shown in Fig. 5,6.

The beneficial effects of the utility model:

The utility model is by changing the shape and the mounting type of gap-clearance of piston rings, makes the good sealing of formation between piston ring groove and the cylinder bearing face, and its end-gaps passage all is blocked radial and axial.Though end-gaps increases with the loss of ring like this, in certain wear range, the stage casing of S shaped incision (a) contacts all the time, do not have directly influence to leaking.Referring to Fig. 5,6.

No oil ring of the present utility model can be realized the bidimensional sealing of end-gaps, and the abrasion of ring are little to leakage contribution within the specific limits, so can improve working life effectively, cuts down the consumption of energy significantly.

The utility model is simple in structure, and is easily manufactured, can obviously improve the working efficiency and the working life of compressor.

Description of drawings

Fig. 1 is the structural representation of the existing degree of lip-rounding piston ring of cutting sth. askew.

Fig. 2 is the plan view of Fig. 1.

Fig. 3 is the structural representation of existing radially S shaped incision piston ring.

Fig. 4 is the plan view of Fig. 3.

Fig. 5 is a planar S shape otch piston ring dicyclo of the present utility model structural representation when using.

Fig. 6 is the plan view of Fig. 5.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

Shown in Fig. 5,6.

A kind of no oily piston ring, its main body is structure in the form of a ring, has the planar S shape otch (Fig. 5,6) with its disconnection on the anchor ring of described ring structure.As can be seen from Figure 3, the wearing and tearing of piston ring external diameter all can not influence the contact segment of S shape stage casing (a) point within the specific limits, and the contact segment in S shape stage casing is to realize the key of radial seal, in each mounting groove, misplace 180 ° during concrete the use and install two, then can realize axial seal, shown in Fig. 5,6.So can realize axially and two-way blocking-up end-gaps leakage way radially, realize good sealing, effect significantly better than Fig. 1,2 and Fig. 3,4 shown in seal ring.

The utility model does not relate to part to be realized as prior aries that maybe can adopt all same as the prior art such as the employed materials of piston ring.

Claims

1. no oily piston ring, its main body is structure in the form of a ring, has the planar S shape otch with its disconnection on the anchor ring of the described ring structure of its feature.