CN2178786Y

CN2178786Y - Spiral anti-turn no-clearance piston ring and ring groove and adaption

Info

Publication number: CN2178786Y
Application number: CN 93215620
Authority: CN
Inventors: 苏永福
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-12
Filing date: 1993-06-12
Publication date: 1994-10-05
Anticipated expiration: 2003-06-12

Abstract

The utility model is designed in a spiral shape. The utility model relates to the piston rings and ring groove of an internal combustion reciprocating-piston engine. The piston rings are staggered to be closed. The technique of the utility model generates comprehensive and favorable effects of a high sealing performance, reliability, a simple structure, etc. due to the special adaption of the piston rings and the ring groove. The utility model is especially suitable for two-stroke engines.

Description

Spiral anti-turn no-clearance piston ring and ring groove and adaption

The utility model relates to a kind of technology of eliminating the reciprocating-piston engine piston ring gap.

At present, the piston ring gap of known reciprocating-piston engine is key factor, especially the float amount two stroke engine that reduces cylinder pressurization ratio.

The purpose of this utility model provides a kind of piston ring of reciprocating-piston engine, and it keeps no gap in rising-heat contracting-cold, and cooperates with the annular groove of respective shapes, thereby strengthens cylinder pressurization ratio.

The purpose of this utility model is achieved in that it is the screw type that waits rectangle that piston ring is made the cross section, opening alternating expression closure, and piston groove is also made the shape that matches with above-mentioned piston ring.

Owing to take such scheme, can make piston ring in rising-heat contracting-cold, remain closure like this, promptly eliminated piston ring gap and can not make the piston ring cylinder that rises again, simultaneously, because the piston ring alternating expression is closed and with the cooperating of annular groove, can prevent that piston ring from rotating along annular groove, be particularly useful for two stroke engine.

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1, Fig. 2 be the mentioned piston ring of the utility model just, plan view.

Fig. 3 is the view of the mentioned piston ring groove of the utility model from the closed aspect of piston ring alternating expression.

Fit like a glove leaving under the suitable gap situation by Fig. 1, piston ring shown in Figure 2 and annular groove shown in Figure 3.

Because this scheme, piston ring remains no gap at work, and matches with annular groove, and piston ring can not rotated along groove, this technology is applied to two stroke engine, and its reliability prevents the technology that piston ring rotates apparently higher than at present known with locating stud.

By the technical construction of the present utility model of Fig. 1, Fig. 2 and Fig. 3, also can produce following good result.When piston ring is promoted in cylinder to-and-fro motion by piston and since the piston ring side be subjected to the force direction out of plumb, thereby make piston ring be subjected to a moment W effect, as shown in Figure 2, and piston ring expands to casing wall under the W effect, thus the applying power of enhancing and casing wall, shown in Fig. 2 dotted arrow.

The utility model is used for the motor that float amount two-stroke piston ring is no more than twice, is to realize best way of the present utility model.

Claims

A kind of no gap piston ring is with annular groove and cooperate model utility, it is characterized in that: piston ring is a screw type alternating expression closure, and cooperates with the annular groove of respective shapes.