CN2522631Y

CN2522631Y - Combined piston gaseous ring to improve engine sealing property

Info

Publication number: CN2522631Y
Application number: CN 02221378
Authority: CN
Inventors: 夏麒彪; 李书菊
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-23
Filing date: 2002-01-23
Publication date: 2002-11-27
Anticipated expiration: 2012-01-23

Abstract

The utility model relates to a combined piston gaseous ring to improve engine sealing property and consists of a main ring and two assistant rings. A first assistant ring is arranged under the main ring, has the same radial width as the main ring and is axially overlapped with the main ring; openings of the two rings are staggered to form an angle of 120 degrees; the first assistant ring can seal an axial channel of an opening gap of the main ring. A second assistant ring is arranged in the main ring and the first assistant ring; the height of the second assistant ring is equal to a summation of heights of the main ring and the first assistant ring; and the second assistant ring is overlapped with the two rings in a radial direction. An opening of the second assistant ring and the openings of the main ring and the first assistant ring are staggered to form an angle of 120 degrees. The second assistant ring can seal a radial channel of an opening gap of the main ring and the first assistant ring. The utility model provides a good solution to sealing problems of prepared opening of a piston ring for high-temperature thermal expansion, and a fundamental improvement of sealing properties of high-pressure gas in engine so as to increase the engine power and to reduce fuel consumption and environmental pollution of the engine. At the same time, the utility model uses a novel structure with one groove and three rings to replace an original structure with three grooves and three rings; the structure is simple and the processing is convenient.

Description

A kind of built-up piston compression ring that improves the motor sealability

Technical field

The utility model relates to a kind of built-up piston compression ring that improves engine high pressure gas sealing performance.

Background technique

100 for many years, internal-combustion engine uses piston ring and its annular groove sealing configuration one to one always, produce some roads piston ring groove at the head of piston exactly, cylinder iron or steel produce the elastic piston ring of opening, in mode (putting into a piston ring in the piston ring groove) one to one, piston ring is put into piston ring groove, and then whole piston assembly is packed in the cylinder-bore.This piston ring and piston ring groove be textural association one to one, generally all has 2～3 at the head of various engine pistons.Because the diameter of piston ring under free state is greater than cylinder bore, it is little with instrument piston ring to be received, and it has just had elasticity.After piston assembly put into cylinder because the elasticity of piston ring will inevitably make piston ring paste cylinder wall all the time tightly, like this with regard to shutoff inevitable gap between piston and the casing wall, play the effect of sealing.But the opened gap of piston ring must stay enough and stop, because the high temperature that oil inflame produces, piston ring is expanded and the girth increase, if piston ring is not reserved enough opened gaps, then can make piston ring stuck in cylinder, powerful explosive force forces piston to move by force during oil inflame, can cause the serious accident of scuffing of cylinder bore.

Yet above-mentioned ring and annular groove be textural association one to one, does not solve the sealing problem of gap-clearance of piston rings place well, makes gap-clearance of piston rings place become the central core of circulation that engine gas leaks.Generally take multiple-sealed structure series connection at present, with increasing gas leakage is reduced along the method for journey pressure drop, the textural association (being generally 2～3 roads) of multiple tracks piston ring and its annular groove promptly is set at piston crown, during installation the opened gap of each road piston ring is staggered 120 °～180 ° each other.Do so just to reduce and leak, the leakage of not eradicating high-pressure gas causes motor power in various degree to descend, oil consumption increases and to the pollution of environment thus.

Summary of the invention

The purpose of this utility model is to provide a kind of built-up piston compression ring that improves the motor sealability, can fundamentally improve the airtight property of motor, and is simultaneously simple in structure, easy to process.

For reaching above technical purpose, the utility model by the following technical solutions.

A kind of built-up piston compression ring that improves the motor sealability, form by one main ring and twice inner loop, the first road inner loop is below main ring,, axial overlap radially wide with main ring, two ring openings stagger 120 °, but the axial passage of this inner loop shutoff main ring opened gap, the second road inner loop is in the inside of the main ring and the first road inner loop, it highly equals main ring and the high summation of the first road inner loop ring, and it is radially overlapping with two rings, its opening also staggers 120 ° mutually with two ring openings, but the radial passage of the second road inner loop shutoff main ring and the first road inner loop opened gap.

This built-up piston compression ring still adopts open type elastic piston ring commonly used, forms by reasonable combination, and main ring plays main seal action, can be made by wear-resisting cast iron, and inner loop plays the auxiliary seal effect, can be made by alloyed steel, and can make thinlyyer.

Because this built-up piston compression ring is to be combined by three open elastic rings, so it is the same with single open elastic ring, the needs of adaptation material high temperature heat expansion fully well.

The utility model compared with prior art has the following advantages:

(1) fundamentally improved the sealing problem of engine high pressure combustion gas, particularly solved the sealing of the gap-clearance of piston rings of reserving for high temperature heat expansion place, thereby increased engine power, reduced engine consumption and the pollution of environment;

(2) new structure with a groove three rings has replaced the old structure that original three-flute three encircles, and has the actual effect of simplified structure, convenient processing.

Description of drawings Fig. 1 is that a kind of sectional view Fig. 2 that improves the built-up piston compression ring of motor sealability of the utility model is that a kind of plan view Fig. 3 that improves the built-up piston compression ring of motor sealability of the utility model is that the utility model is that the utility model is the sectional view of the utility model at the second road inner loop opening at sectional view Fig. 5 of the first road inner loop opening at sectional view Fig. 4 of main ring opening

Embodiment

Referring to Fig. 1, engine piston 4 is positioned in the cylinder, there is gap 6 between piston 4 and the casing wall 5, the head of piston 4 has piston ring groove 7 one, the utility model built-up piston compression ring is put into piston ring groove 7, high-pressure gas forms back clearance 9 and crack, limit 10 between this associative ring and annular groove, among can enter into back clearance 9 and crack, limit 10 from the gap 6 of piston and casing wall.Under the high pressure effect, piston ring downwards and outwards extruding, except making compound piston ring is adjacent to annular groove 7 lower edges and casing wall 5 tightly, each ring each other also extruding be adjacent to.

Referring to Fig. 1, Fig. 2, a kind of built-up piston compression ring that improves the motor sealability, by one main ring 1 and twice

inner loop

2,3 form, the first road inner loop 2 is below main ring 1, radially wide with main ring, axial overlap, two ring openings 1 ', 2 ' staggers 120 °, but the axial passage of this inner loop shutoff main ring opening 1 ', the second road inner loop 3 is in the inside of the main ring 1 and the first road inner loop 2, it highly equals main ring 1 and the high summation of the first road inner loop, 2 rings, and radially overlapping with two rings, its opening 3 ' also staggers 120 ° mutually with two ring openings, but the radial passage of the second road inner loop, 3 shutoff main rings 1 and the first road inner loop, 2 openings 2 '.

Referring to Fig. 3, Fig. 4, Fig. 5, compound piston ring is the superior part of general expression piston ring relatively, just be that it has solved the sealing of the gap-clearance of piston rings of being reserved for high temperature heat expansion place well, 2 shutoff of the first road inner loop high-pressure gas directly by main ring opening 1 ', flow to the axial passage in gap 8, ring below from gap 6, main ring top; The second road inner loop 3 has stoped the high-pressure gas in the back clearance 9 to pass the opening 2 ' of the first road inner loop 2, flow to the radial passage in gap 8, ring below from back clearance 9, thereby has realized sealing completely fully.

Claims

1 one kinds of built-up piston compression rings that improve the motor sealability, form by one main ring 1 and twice inner loop 2,3, the first road inner loop 2 is below main ring 1,, axial overlap radially wide with main ring 1, two ring openings stagger 120 °, and the second road inner loop 3 is in the inside of the main ring 1 and the first road inner loop 2, and it highly equals main ring 1 and the high summation of the first road inner loop, 2 rings, and radially overlapping with two rings, its opening also staggers 120 ° mutually with two ring openings.