CN2399514Y - Endless gap piston ring - Google Patents

Abstract

The utility model relates to an endless gap piston ring. The perimeter of an outer diameter of a piston ring of the utility model is longer an overlapped size of one end of one piston ring opening than the perimeter of an inner diameter of an air cylinder; two ends of the overlapped position are made into complementary notches of diagonal lines, the thickness of the overlapped position is same with the thickness of the piston ring, so the blowby of air can be prevented, and the air tightness of end gaps of the piston ring opening after the inner walls of the air cylinder and the outer diameter of the piston ring are worn out is increased. The overhaul period for a diesel locomotive is prolonged, and the original compression pressure and original power performance of the diesel locomotive are reserved. The diesel locomotive is not provided with blue smoke of burning machine oils which can pollute environment.

Description

No end gap piston ring

The utility model relates to a kind of internal-combustion engine, air compressor does not have end gap, the good piston ring of close gas.

In the existing technology, the shape of internal-combustion engine, air-compressor piston ring otch has straight flange otch, hypotenuse otch and cascade otch etc.Straight flange otch piston ring is most widely used general.Hypotenuse otch, cascade otch are used less.Straight flange otch, hypotenuse otch piston ring external diameter and cylinder inner wall rub for a long time, produce the wearing and tearing of piston ring external diameter, the cylinder inner wall wearing and tearing, and piston ring increases at cylinder inner opening end gap.Make compression pressure reduction, cylinder seal performance variation, fuel consumption increase, combustion engine powered decline, scurry lubricant oil generation burn oil, emit the blue smoke befouling environment.Concerning air compressor: air pressure is difficult to improve.Oily thing increases in the gas storage bag, energy consumption increases, efficient reduces, necessary overhaul so far, boring cylinder, replacing piston and piston ring.Cascade otch piston ring can compensate the piston ring side clearance that increases because of cylinder inner wall, the wearing and tearing of piston ring external diameter.But exist pressurized air and detonation gas enters in the piston ring groove from upper shed, scurry out through under shed.Also can reduce internal-combustion engine compression pressure, increase fuel consumption, power of IC engine decline.

The purpose of this utility model is to avoid deficiency of the prior art, and a kind of piston ring of similar cascade otch is provided.After the wearing and tearing of cylinder inner wall and piston ring external diameter, can compensate end gap, and can not produce gas blowby, scurry oil.Keep the intrinsic compression pressure of internal-combustion engine, do not reduce combustion engine powered, do not increase fuel consumption, do not emit the blue smoke of befouling environment.The piston ring in prolonging overhaul cycle.

The purpose of this utility model is achieved in that the otch of piston ring is a diagonal cut, promptly the cross section of piston ring by internal diameter by the last corner of piston tip to the diagonal of external diameter away from the following corner of piston tip, two ends complementation otch.This diagonal cut itself is just blocked after the piston ring scuffing from end gap upper shed gas blowby to annular groove.Reach close gas effect.

Owing to adopt such scheme, can when cold car, improve compression pressure without combustion, when cylinder of internal-combustion engine wall, piston ring scuffing as long as diagonal cut is also closed, just can not reduce compression pressure, can not gas blowby, lubricating oil carry-over, can not reduce the power of internal-combustion engine, can not emit the blue smoke befouling environment.And the prolonging overhaul cycle (or mileage).

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

Fig. 1 is the partial front elevation view of the utility model piston ring diagonal cut incision.

Fig. 2 is the partial top view of the utility model piston ring diagonal cut incision.

Fig. 3 is the part sectioned view of the utility model piston ring diagonal cut incision.

Fig. 1 be piston ring in the cylinder of packing into, port is subjected to cylinder wall restriction and closed shape.Fig. 2 is that piston ring is packed in the cylinder, the overlooking of port closure.Fig. 3 is the diagonal cut partial enlarged drawing, and its otch is the piston ring cross section by internal diameter is complementary otch by the angle of piston tip to piston ring external diameter away from the diagonal at the angle of piston tip.Incision length is the overlapping length of piston ring two ends.When the wearing and tearing of piston ring external diameter, cylinder inner wall, pressurized gas detonation gas rush at the end gap mouth that wearing and tearing strengthen, yet the internal diameter cylinder of triangle and piston groove upper wall have been sealed blow-by gas passage under the piston ring ends, so prevent gas blowby, scurry oil, kept the original compression pressure of internal-combustion engine.In sum, overlapping many of piston ring ends, the internal-combustion engine overhaul life will prolong, and reduces the fuel consumption that causes because of the wearing and tearing of cylinder and piston ring and increase, scurry lubricant oil the pollution and the power character of air descended.

Claims (1)

1, a kind of no end gap piston ring, it is characterized in that: the otch of piston ring is a diagonal cut, the cross section of piston ring leans on the last corner of piston tip to the diagonal of external diameter away from the following corner of piston tip, the otch of two ends complementation by internal diameter.

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