CN2228984Y

CN2228984Y - Joint overlap type piston ring

Info

Publication number: CN2228984Y
Application number: CN 95219798
Authority: CN
Inventors: 赵敏杰
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-19
Filing date: 1995-08-19
Publication date: 1996-06-12
Anticipated expiration: 2005-08-19

Abstract

The utility model relates to an interface overlap type piston ring. The interface of the piston ring adopts the tenon type structure of double overlap of a radial direction and an axial direction. One interface end is made into a concave tenon with a definite shape, and the other interface end is made into a convex tenon with the corresponding shape. The concave tenon is matched with the convex tenon and the concave tenon and the convex tenon are arranged in the way of overlapping. The utility model alters the phenomena that the existing piston ring is provided with an opening gap with the purpose of preventing the expansion of a cylinder and gas leaks from the gap. The utility model has the advantages of the improvement of air tightness, the improvement of lubrication conditions, the reduction of degree of wear, the extension of the service life of a piston, a cylinder, and the piston ring, the improvement of power, the reduction of oil consumption, the reduction of pollution, and the improvement of the power and the economic performance of an IC engine.

Description

Interface overlapping piston ring

The utility model relates to the interface overlapping piston ring that a kind of internal combustion engine is used.

During internal combustion engine, piston ring is contained in the piston ring groove, relies on its elastic force to be adjacent on cylinder wall, and in the to-and-fro motion of cylinder high speed, the effect of piston ring is a sealing cylinder with piston, stops the outburst gas in the cylinder to scurry into crankcase.Piston ring is worked under high temperature condition, because expanded by heating influence, piston ring all leaves an opened gap, and piston ring and cylinder speed of related movement are fast, poor lubrication, surface of contact weares and teares unavoidably, piston ring gap continues to increase, and is easy to generate gas leakage, and tightness reduces, compressive force descends, and oil consumption is increased.The composition ring piston that proposes adopts piston ring groove dress twice piston ring one at present, and the opening dislocation is arranged, considers to solve the gas leakage problem from fit on.But the outburst gas in the cylinder might pass through the opening of opening, piston ring groove and the following piston ring of top piston ring constitutes leakage path, again because of having exhaust, scavenging, air inlet openings, combined type piston ring can not be used for other facility that two stroke IC engine and casing wall have opening on the two stroke IC engine cylinder wall.

The utility model is exactly for overcoming the problem that prior art exists, proposing a kind of interface and adopt tenon formula overlay structure, to improve the interface overlapping piston ring of piston-cylinder air-tightness.

The utility model is to take following measure to realize its purpose: adopt tenon formula overlay structure at the piston ring joint place, an interface end is made the blind mortise of definite shape, and another interface end is then made the tenon of correspondingly-shaped, and the two cooperatively interacts, overlapping preparation.

The tenon formula overlay structure of piston ring joint, can make the blind mortise cross section of an interface end make rectangle, lower corner is made a blind mortise in the end face outside, highly be advisable for 1/2nd of piston ring depth of section, width in two kinds of situation, to quartastroke engine, the blind mortise width is that 2/3rds of piston ring cross-sectional width is advisable, to two stroke IC engine, the blind mortise width is that 1/2nd of piston ring cross-sectional width is advisable; The tenon cross section of another interface end of piston ring is corresponding rectangle, and lower corner is made tenon in the end face outside, height and width and rectangle blind mortise corresponding matching.

Consider the difficulty or ease of manufacturing process, also the rectangle convex-concave tenon of piston ring joint tenon formula lap can be made the convex-concave tenon that the cross section is a right-angled triangle, the blind mortise cross section of one interface end is a right-angled triangle, make a blind mortise in its end face outside lower corner equally, to quartastroke engine, height and width are got 2/3rds of height of piston ring and width respectively and are advisable, and to two stroke IC engine, height and width are got 1/2nd of height of piston ring and width respectively and be advisable; The tenon cross section of another interface end of piston ring is corresponding right-angled triangle, make tenon in its end face outside lower corner equally, height and width and right-angled triangle blind mortise corresponding matching, to two stroke IC engine, the interior garden or the upper edge jointing of piston ring should be made the wrist pin breach, so that be used with the piston-cylinder wrist pin.

Overlapping piston ring joint end also can be made into other tenon formula overlay structure, as fibulae type overlay structure etc.

More than the tenon formula overlay structure of various sectional shapes, blind mortise and tenon length are all decided on the cylinder bore size, generally get 1.2-4 millimeters and are advisable.Two opened gaps reserving that stagger after the assembling equate (bigger being advisable) with the opened gap of former internal-combustion engine piston ring, the shape in piston ring diameter and cross section thereof, highly, width is all identical with former internal-combustion engine piston ring.

Piston ring joint tenon formula overlay structure is referring to each relevant diagram.

Fig. 1 is interface overlapping piston ring structure (a looking up) schematic representation (four-stroke)

Fig. 2 is interface overlapping piston ring structure (looking up) schematic representation (a garden breach in two-stroke, the band)

Fig. 3 is interface overlapping piston ring structure (looking up) schematic representation (two-stroke, a band upper edge breach)

Interface overlapping piston ring, since adopt jointing radially, axial dual folded tenon type structure, changed existing piston ring and be the set opened gap of cylinder that prevents to rise and produced the phenomenon of gas leakage, thereby air-tightness improves greatly, the oil ring frizing has better effect, improved the lubricating condition of piston, casing wall, the degree of wear reduces, and is used with tension ring, can keep the conformity of piston and cylinder wall matching gap, prevent that swing from appearring in piston, avoids producing noise.Because the overlapping certain-length in interface overlapping piston ring joint place, but the gas leakage gap that occurs after the compensate for wear, thereby the working life of prolongation piston, cylinder, piston ring.Adopt this piston ring, can improve moving rate, reduce oil consumption, reduce and pollute, improve the power performance and the economic performance of internal-combustion engine, extensive popularizing value is arranged.

Claims

1, a kind of interface overlapping piston ring of internal combustion engine application is characterized in that, the piston ring joint place adopts tenon formula overlay structure, one interface end is made the blind mortise of definite shape, another interface end is then made the tenon of correspondingly-shaped, and the two cooperatively interacts, overlapping configuration.

2, interface overlapping piston ring according to claim 1, it is characterized in that, the blind mortise cross section of piston ring one interface end is a rectangle, lower corner is made blind mortise in the end face outside, it highly is 1/2nd of piston ring depth of section, to quartastroke engine, width is 2/3rds of a piston ring cross-sectional width, to two stroke IC engine, width is 1/2nd of a piston ring cross-sectional width, the tenon cross section of another interface end of piston ring is corresponding rectangle, and lower corner is made tenon in the end face outside, height and width and rectangle blind mortise corresponding matching.

3, interface overlapping piston ring according to claim 1, it is characterized in that, the blind mortise cross section of piston ring one interface end is a right-angled triangle, lower corner is made blind mortise in the end face outside, to quartastroke engine, height and width are got 2/3rds of height of piston ring and width respectively, to two stroke IC engine, height and width are got 1/2nd of height of piston ring and width respectively, the tenon cross section of another interface end of piston ring is corresponding right-angled triangle, lower corner is made tenon in the end face outside, height and width and right-angled triangle blind mortise corresponding matching.

According to claim 2,3 described interface overlapping piston rings, it is characterized in that 4, to two stroke IC engine, the interior garden or the upper edge jointing of piston ring should be made the wrist pin breach.