CN2171684Y

CN2171684Y - Piston with compound ring

Info

Publication number: CN2171684Y
Application number: CN 93215079
Authority: CN
Inventors: 郑昭
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-31
Filing date: 1993-05-31
Publication date: 1994-07-13
Anticipated expiration: 2003-05-31

Abstract

The utility model relates to a piston with a compound ring, which is applied to an automobile engine. The utility model comprises the piston (1), a piston ring (2) and a piston ring (6). The piston (1) is a double-cone body. Multiple channels of air ring grooves and oil ring grooves are distributed on the head of a cone body. The skirt part of the cone body has small taper, which is convenient to guide. Piston rings adopt the combination of a combined air ring (2) and a combined oil ring (6). The combined air ring (2) is single-groove double rings with a return curving lining spring structure. The piston with a compound ring is adopted which can enhance the sealing performance of a cylinder, extend service life, overcomes swinging movement after a piston abrasion, reduce noise, improve the lubricating condition of the piston and a cylinder arm, lower oil consumption, reduce pollution and raise the power performance of an engine.

Description

Piston with compound ring

The utility model relates to the composition ring piston that a kind of motor car engine is used, and is applicable to diesel oil or petrol engine, but also is applicable to air compressor.

At present, motor car engine extensively adopts the reciprocating piston in the connecting rod both at home and abroad, and the piston body head is heated than skirt section height during work, often makes single cone shape, and head diameter is littler than the skirt section.In the piston ring groove of head, mostly every groove is to adorn a piston ring, especially compression is only adorned a slice compression ring, when the piston of this structure is made high-speed motion in cylinder, because working environment restriction, bear High Temperature High Pressure, poor lubrication in addition, the surface of contact of piston ring very easily weares and teares in the cylinder and piston, makes piston ring gap constantly become big, and dancing appears in the to-and-fro motion meeting of piston in cylinder, even send knock, produce gas leakage between counterpart, engine power performance, economic performance degenerate, and have limited the working life of motor.The wearing and tearing of cylinder and piston ring, concentrated expression are that piston ring gap becomes big when cooperating, and therefore, the size of piston ring gap is the key factor of decision engine performance.Single groove single ring architecture of existing piston structure, especially compression ring can't remedy opened gap and become the big influence that causes, and cylinder arm and wear of piston-rings are difficult to avoid, so that tightness reduces, and compressive force descends, and engine consumption raises, underpower, over-emitting black exhaust, noise increases.

The purpose of this utility model just is the defective at above-mentioned existing piston structure, and the composition ring piston that provides a kind of bicone to be furnished with combined gas ring and oil ring structure, thereby improve engine power performance and economic performance.

The composition ring piston comprises piston and piston ring.Piston is a bicone, and piston pin hole is a cone with head portion, and piston pin hole is little with skirt end taper ratio head tapering, can be chosen as the tapering of 50:1 and 500:1 respectively.Piston crown is distributed with the multiple tracks annular groove, divides compression and oil ring groove, and compression is generally two roads or more than it, is evenly equipped with dozens of capillary oilhole between the annular groove on the ring wall last; Oil ring groove is down, be generally together or more than, there is a long-pending oil groove every groove below, is evenly equipped with several spill ports in the long-pending oil groove.The piston skirt cone has the lubricated long-pending oil groove of several mutual circular arc at regular intervals.Oil groove and oilhole can improve the lubricating condition of piston and cylinder arm.

Piston ring comprises combined gas ring and multipiece ring, and combined gas ring radially returns bent lining spring by two opening elasticity compression rings and to be formed, and when being installed on piston ring groove, the aperture position of two compression rings is arranged at an angle; The bottom land liner radially returns bent lining spring, can select leaf spring, and its width can slide in the time of should guaranteeing to cooperate with the annular groove upper and lower end face, and opening should leave the gap.Between two compression rings and and the annular groove end face between all maintain the gap.Multipiece ring is made up of two scraper rings, and its aperture position is also arranged at an angle.The angle of compression ring and scraper ring aperture position is the best with 180 ° of symmetric arrangement.Compression ring and scraper ring can adopt rectangular section ring or twist type ring, keystone ring etc.

The piston advantage of this structure is:

1, tightness is good.Combined gas ring is that single groove dicyclo adds and radially returns bent lining spring structure, the angled layout of dicyclo opening, can avoid piston in cylinder, to produce lower air ring open butt joint short circuit, the elastic force that radially returns bent lining spring makes ring be close to the cylinder arm all the time, tightness improves greatly, has overcome piston ring gap to bubble-tight influence.

2, increase the service life.During reciprocating motion of the pistons, cylinder arm and wear of piston-rings can be eliminated the radial clearance between cylinder arm and the piston ring owing to radially return the effect of bent lining spring, gap-clearance of piston rings increases, but the angle of opening is arranged, still can keep its tightness constant, thereby has prolonged piston working life.Moreover the piston skirt tapering is little, can improve its steering capability, has improved piston working life.

3, overcome the piston swing, reduce noise.Mainly be the effect of radially returning bent lining spring, the gap between piston ring and the cylinder arm is eliminated, thereby overcome the piston dancing that occurs when piston ring scuffing produces the gap, also avoided the noise that produces therefrom.

4, save lubricant oil.Oil ring adopts dicyclo opening symmetric arrangement, can reduce the opening oil leak and scrape phenomenon, improves the frizing performance, saves machine oil.

Adopt this piston, can reduce oil consumption, reduce and pollute, improve engine power performance, economical, societal benefits are remarkable, are suitable for applying.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the front view of composition ring piston

Fig. 2 is the plan view of composition ring piston

The utility model is described in further detail below in conjunction with accompanying drawing embodiment.The composition ring piston comprises piston (1) and piston ring (2), (6).Piston (1) is a bicone, the above forecone tapering of piston pin hole is 50:1, there are two road compressions the top, be evenly equipped with 0.5 millimeter capillary oilhole of 20 Φ (5) between the annular groove on the ring wall, there are two road oil ring grooves the below, every groove below is equipped with long-pending oil groove (8), is evenly equipped with 16 spill ports (9) in the long-pending oil groove (8); Piston pin hole is got 500:1 with the skirt end cone taper, and the skirt body is processed with the oil groove of 6 road R1.2.

Piston ring divides combined type compression ring (2) and multipiece ring (6), combined gas ring (2) radially returns bent plate formula lining spring (4) by two length of a film square cross-section opening elasticity compression rings (3) and and forms, be installed in piston (1) compression, the aperture position of two compression rings (3) is 180 ° of symmetric arrangement, radially the returning its elasticity of bent plate spring (4) and can make compression ring (3) be close to cylinder arm of bottom land liner; Multipiece ring (6) is the scraper ring (7) of two length of a film square cross-sections, is installed in the oil ring groove, and the aperture position of scraper ring (7) also is 180 ° of layouts.Between two compression rings (3) or two scraper rings (7) and and annular groove between keep appropriate gap, it is dead to prevent to be subjected to heat expansion.

Combined gaseous ring (3) and scraper ring (7) all select for use the 65 manganese steel chrome faced steel band of RC55-62 that hardens to make, and return bent lining spring (4) and select 65 thick 0.2 millimeter manganese steel material for use.

Claims

1, a kind of composition ring piston comprises piston (1) and piston ring (2) (6), it is characterized in that:

A, piston (1) are bicone, and piston pin hole is a cone with head portion, is distributed with the multiple tracks annular groove, and the top is two roads or its above compression, and there is one or more oil ring groove the below, and piston pin hole is little with skirt end taper ratio head tapering;

B, piston ring comprise combined gas ring (2) and multipiece ring (6), combined gas ring (2) radially returns bent lining spring (4) by two opening elasticity compression rings (3) and and forms, when being installed on piston (1) annular groove, the aperture position of two compression rings (3) is arranged at an angle, the bottom land liner radially returns bent lining spring (4), between two compression rings (3) and and the annular groove end face between all maintain the gap; Multipiece ring (6) is made up of two scraper rings (7), and the aperture position of scraper ring (7) is also arranged at an angle;

Be evenly equipped with dozens of capillary oilhole (5) between the annular groove of c, combined gas ring (2) on the ring wall;

Every groove below of d, multipiece ring (6) is equipped with a long-pending oil groove (8), uniform several oilholes (9) in the long-pending oil groove.

2, composition ring piston according to claim 1 is characterized in that the tapering of piston (1) head may be selected to be 50:1, and the tapering in skirt section may be selected to be 500:1.

3, composition ring piston according to claim 1, the two opening elasticity compression rings (3) that it is characterized in that the combined gas ring (2) in the piston ring, and two scraper rings (7) of multipiece ring (6), can adopt rectangular section ring or twist type ring, keystone ring etc.

4, composition ring piston according to claim 1 is characterized in that two compression rings (3) of combined gas ring (2), and two scraper rings (7) of multipiece ring (6), and its aperture position is 180 ° of symmetric arrangement.

5, composition ring piston according to claim 1 is characterized in that the bent lining spring (4) that radially returns of combined gas ring (2) is leaf spring, and leaf spring and annular groove upper and lower end face are for being slidingly matched.

6, composition ring piston according to claim 1 is characterized in that being evenly equipped with on the ring wall between combined gas ring (2) annular groove capillary oilhole (5) of 0.5 millimeter of 20 Φ.

7, composition ring piston according to claim 1 is characterized in that being evenly equipped with 16 spill ports (9) in the long-pending oil groove (8) of the every groove of multipiece ring (6) below.

8, composition ring piston according to claim 1 is characterized in that the bent lining spring (4) that returns of combined gas ring (2) is selected 65 thick 0.2 millimeter manganese steel material for use.

9, composition ring piston according to claim 1 is characterized in that piston (1) skirt section is processed with the oil groove of 6 road R1.2.