CN107327352A

CN107327352A - The sealing structure of cylinder barrel and piston

Info

Publication number: CN107327352A
Application number: CN201710462115.6A
Authority: CN
Inventors: 周建平; 周林
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2017-11-07
Anticipated expiration: 2037-06-09
Also published as: CN107327352B

Abstract

The sealing structure of cylinder and piston of the present invention belongs to mechanical field.The present invention includes piston, piston ring and cylinder wall, piston ring includes upper ring and lower ring, and lower ring is made up of the outer shroud of condition of equivalent thickness with inner ring, and ring group, which is closed, up and down installs in a piston ring, piston ring, which is respectively equipped with boss and combined with groove, mutually forms positioning, and opening staggers sealing.Combustion chamber is opened up in piston ring body, piston ring groove plane, casing wall to leak toward one low drain tolerance passage of crankcase.Leakage path is not because of cylinder, piston ring, match abrasion increase air leakage living.The defect that present engine piston collar extension air leakage is brought greatly is overcome, it is simple in construction, easily install.

Description

The sealing structure of cylinder barrel and piston

Technical field

The present invention relates to the seal structure for piston ring of mechanical field, more particularly to reciprocating-piston and cylinder.

Technical background

Present engine piston ring (being commonly called as conventional piston ring), monocyclic single groove piston ring abrasion after-opening gap gradually adds Greatly, add towards crankcase blow-by amount, reduction power increase fuel consumption.Piston ring, cylinder barrel heat expansion different from piston material Shrinkage is asynchronous, and new engine reserves the casing wall that piston ring is scraped above and below excessive piston ring gap, a large amount of gases push It is atomized during machine oil reflux crankcase, the lubricant separator of atomization can not be completely separated, cylinder is sucked into engine inlets Cause oil consumption big, exhaust emission particulate matter is more, a large amount of burning waste gas particulate matters, which enter crankcase, makes the too fast oxidation of machine oil, Cause engine work vicious circle.

The casing wall machine oil scraped in the middle of multiple-piece piston-ring closure opening gas leakage, bipassage ring can not return to crankcase, largely alter Enter combustion chambers burn.

New engine is due to materials application, metal heat-expansion shrinkage characteristic currently on the market, and gap-clearance of piston rings can not be accomplished most , there is substantial amounts of turbocharged engine oil consumption greatly, seriously in small air leakage, it is impossible to meet the requirement of engine optimum performance Pollute air ambient.

The content of the invention

In order to make up present engine piston ring seal defect, the present invention provides a kind of new seal structure for piston ring, The air leakage of the present piston ring standard openings more than 50% of reduction is realized, not because piston ring and casing wall abrasion opening become big reduction gas Cylinder pressure, meets engine and most preferably does work performance.

Technical solution of the present invention：Encapsulation scheme includes casing wall, piston, piston ring, and such as accompanying drawing 1, piston ring includes upper ring 1, The lower ring includes outer shroud 2 and inner ring 3, and upper ring is installed in an annular groove with lower ring concentric design.It is provided with the inside of the upper lower plane of ring 1 In groove 6, inner ring 3 plane connect provided with boss 7 and upper ring groove 6 and, the inner side of outer shroud 2 provided with boss 9 and the opening grafting of inner ring 3, 1 time ring of ring 2 and the circumferential registration of inner ring 3 in formation.Upper ring 1 staggers with the opening of outer shroud 2, blocks the suitable for reading of outer ring opening 5, inner ring is opened Mouthful stagger with outer ring opening 5 inner side of closure outer ring opening 5, planar radial fluting is open with upper ring body 1 in inner ring 3 communicates, shape Into combustion chamber toward crankcase blow-by passage 4.

The above-mentioned air leakage of leakage path 4 is less than more than the 50% of conventional piston ring standard openings air leakage, gas leakage mesh Be casing wall machine oil backspace crankcase that piston ring is scraped.There is no combustion chamber to leak the leakage path gas leakage toward crankcase, starting Machine suction stroke, which is lived, to be matched descending, piston ring and is fitted with upper annular groove plane, when in cylinder being negative pressure, and upper collar extension 8 and crankcase are phases Logical, the casing wall machine oil that the piston ring in piston ring groove is scraped up and down can suck combustion chamber by upper ring opening 8, cause engine A large amount of burn oil phenomenons.

Preferably, leakage path 4 is implemented in piston plane of a loop.

Preferably, leakage path 4 is implemented in piston ring excircle.

Further, leakage path 4 is implemented in piston ring groove plane.

Further, leakage path 4 is implemented in casing wall.

Feature compared with the prior art of the invention：Existing gap-clearance of piston rings structure is not changed, of good reliability, three rings are mutually justified Mouth gas leakage is determined in all bit combination integrative-structures, realization, not because piston ring scuffing opening increases increase air leakage, in any hair Motivation standard openings gap reduces gas leakage more than 50%.Enhancing power reduces fuel consumption, and low engine speeds moment of torsion is big.Side Gas leakage body is few, piston reciprocating is stable, is worn and torn in reduction cylinder, and increasing service life of engine reduces noise.Reduce work Atomization of the machine oil that plug ring is scraped when gas pushes crankcase to, reduces oil consumption.Leak the burning particles thing toward crankcase Few with exhausted air quantity, oil life accordingly extends.Machine oil content in the reduction of machine oil atomization, waste gas circulation to cylinder is low, in gas When door back and combustion chamber form carbon distribution, carbon distribution is free of machine oil drying regime, when forming layer, due to carbon distribution dry hardening with Metal heat-expansion shrinkage is asynchronous, is separated automatically with metal, and combustion chamber is not forming a large amount of carbon distributions, while solving direct fuel-injection engine Valve back carbon distribution problem.Cylinder pressure does not decline all the time, keeps engine optimum Working, energy-saving and emission-reduction.Solve in a word A series of defects that present engine piston ring opening air leakage is brought greatly.

, below will be to embodiment or existing for the clearer explanation embodiment of the present invention or the technical scheme of prior art The accompanying drawing 1 used needed for technology description is briefly described, it should be apparent that, drawings in the following description are only invention One embodiment,, can be with root on the premise of any creative labor is not paid for the common art personnel in this area Other accompanying drawings is obtained according to accompanying drawing

Fig. 1 is the sealed piston ring structure diagrammatic top view of cylinder and piston of the present invention.

Brief description of the drawings

1 is upper ring body.

2 be lower outer shroud ring body.

3 be lower inner ring ring body.

4 be planar radial fluting on inner ring body.

5 be outer ring body opening.

6 be upper ring body lower plane inboard groove.

7 be plane boss in inner ring.

8 be upper ring body opening.

9 be outer shroud inner circle radial direction boss.

It should be noted that the present invention staff is to be engaged in motor vehicle repair personnel for many years, piston ring is that the primary motivation of purchase is lived Plug ring is processed oneself.In order to cost-effective, tested on single-cylinder air-cooled motorcycle, it is repeatedly various not set gas leakage mouthful The piston ring test of structure is all unsuccessful, and reason is gas leakage in no fixed-point set, and a large amount of machine oil scurry into combustion chamber.It is determined that fixed After the certainty of mouth gas leakage, determine the experiment of the various structures of mouth gas leakage, in engine test is disassembled repeatedly, do not occur any Bad phenomenon, upper ring does not have any abrasion with lower ring binding face, and inner ring not circular runout after being tested successfully on motorcycle, is filled Tested on the engine of following examples.

Embodiment

As shown in Figure 1, ring 1, lower ring include outer shroud 2 and inner ring 3, outer shroud 2 and the thickness phase of inner ring 3 on the piston ring of this implementation Deng, upper ring 1 is equal with lower ring thickness, the lower plane inboard groove 6 of upper ring 1 connect with the plane boss 7 of lower inner ring 3 and, it is convex on the inside of outer shroud 2 Planar radial fluting 4 is formed radially leakage path with outer ring opening 5 in platform 9 and the opening grafting of inner ring 3, inner ring 3.Upper ring opening 8 Stagger 60 ° with lower outer ring opening 5, upper ring opening design prevents the opening gas leakage impact of piston ring 1 above lower outer shroud boss 9 The circular runout of inner ring 3, upper ring 1, lower ring 2 and the concentric design of inner ring 3 are installed in first annular groove of match living.

With on one 1.8 liters 4 cylinder gasoline turbocharged engine automobiles described in embodiment, this preceding engine of experiment is Through travelling 220,000 kilometers, 1 liter of machine oil of consumption of lubricating oil thousand kilometer, machine oil filling standard volume travels 800 kms and machine oil report occurs Alert phenomenon, new car dispatches from the factory engine motor oil consumption for 3500 kilometers 1 liter, with the increase oil consumption of traveling milimeter number Gradually increase.Two sets of new piston rings have been bought, top compression ring is taken, a compression ring processes inboard groove as upper near collar extension Ring, a reserved inner side boss polishing inner side is as lower outer shroud, and former top compression ring for engines polishing outside is corresponding in upper plane Position processes boss.Test engine live match head diameter be less than cylinder diameter 0.80mm, piston in the middle of cylinder barrel with casing wall gap It is 0.40mm, gap-clearance of piston rings standard clearance 0.25mm, gap-clearance of piston rings gas leakage area 0.10mm².Plane and outer shroud in inner ring Opening is diametrically located：Open wide 0.20mm, depth 0.25mm grooves.Angle carries out chamfering on recess outlet, prevents groove from being opened with outer shroud Mouth dislocation is blocked.The directly processing of primary first of annular groove of motivation fills two layers of piston ring thickness, and piston ring is loaded in annular groove.Casing wall Direct application is not processed.

Rear engine powerful is assembled, vehicle travels 5000 kilometers of oil rule liquid levels and is not decreased obviously, and tail gas is not There is unpleasant burn oil smell, engine inlets are not having within liquid machine oil, 10000 kilometers of 0.2 liter of consumptions of lubricating oil. Match top living carbon distribution has self falling vestige, and blast pipe afterbody does not have do not having seepage machine oil to show at jet-black phenomenon, engine sealing As starting dynamic traveling engine when temperature is low not in the sound for having acceleration piston knock, tail gas of validating the car meets discharge standard.

Claims

1. sealing structure includes piston, piston ring and cylinder wall, the piston ring includes upper ring (1) and lower ring, and lower ring has on an equal basis The outer shroud (2) of thickness is combined with inner ring (3), and plane in groove (6), inner ring (3) is provided with the inside of upper ring (1) lower plane and is provided with boss (7) engaged with upper ring groove (6), the inner side of outer shroud 2 is provided with radial direction boss (9) and inner ring (3) opening grafting, upper ring (1) and lower ring (2) inner ring (3) mutually forms circumferential registration.Planar radial fluting (4) forms the passage led into toward outer ring opening in inner ring (3). Ring opening 8 and 5 staggers setting.Ring (2) is combined with inner ring (3) in one piston ring groove of installation under upper ring (1).

2. leakage path described in claim 1 (4), implements in piston ring body.

3. leakage path described in claim 1 (4), implements in piston ring groove plane.

4. leakage path described in claim 1 (4), implements in cylinder wall.