CN2380702Y

CN2380702Y - Single-slot self-sealing piston gas-loop

Info

Publication number: CN2380702Y
Application number: CN 99228123
Authority: CN
Inventors: 高翔
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-13
Filing date: 1999-04-13
Publication date: 2000-05-31
Anticipated expiration: 2009-04-13

Abstract

The utility model discloses a single-slot self-sealing air ring of a piston, which is arranged in a piston ring groove of an engine and mainly composed of two opening air rings which are arranged in a same ring groove, and opening clearance positions are mutually staggered. Outer rings of the air rings can also be provided with small grooves. The disadvantage that sealing only can be formed in a mode that two ring grooves are matched in the prior art is overcome, and sealing can be formed by each ring groove. The utility model has the advantages of simple structure, convenient manufacture, good tightness, large output power, long service life, etc. The utility model is suited to be widely used on a gasoline engine and a diesel engine.

Description

Single groove self-sealing piston compression ring

The utility model relates to a kind of piston ring, and particularly a kind of piston gas ring that all has good sealability and greasy property in the per pass piston ring groove that is contained in belongs to the piston field.

Piston internal-combustion engine is to do straight reciprocating motion with piston in cylinder, and piston drives crank rotation acting by connecting rod.In order to make piston motion prevent the cylinder inner high voltage gas crank box that bleeds freely again, need on piston outer wall, to have several annular groove, annular groove is spaced apart 5-10mm, a piston ring is housed in the per pass annular groove, piston ring can be divided into compression ring and oil ring by function, compression ring is used for seals high pressure gas, and oil ring is cloth oil when moving upward, frizing when moving downward.Owing to the reason of expanding with heat and contract with cold, an opening is all arranged on the piston ring, in order to reduce the gas leak phenomenon of this opening, existing compression ring is the multi-groove structure, be that single groove can not seal, generally all be designed to more than the twice, and the installation of need staggering of the aperture position of adjacent compression ring, even now, still can cause that sealability descends because of opened gap is excessive, because of the gap of this opening when too small, can accelerated wear test behind the piston ring expanded by heating, even can be stuck in cylinder, for fear of taking place by the card phenomenon, opened gap can only be stayed greatlyyer, the high pressure air in the cylinder is known from experience and is entered annular groove from the opened gap of upper strata compression ring and spill through the opened gap of lower floor's compression ring more at interval, so, the existing piston compression ring exists annular groove quantity many, sealability is not good, causes starting difficulty easily, shortcomings such as output power decline and tail gas pollution are serious

The purpose of this utility model is in order to overcome the shortcoming that above-mentioned single groove of the prior art can not seal, and designs single groove self-sealing piston compression ring that a kind of per pass annular groove all has reasonable in design, simple in structure, the long service life of sealing effect.

Single groove self-sealing piston compression ring of the present utility model is made up of two opening compression rings, and the thickness of each sheet compression ring is slightly less than half of annular groove width, and the opened gap of described two compression rings staggers mutually and is installed in in the annular groove.In order in sealing, to increase greasy property, can on the cylindrical of compression ring, have sulculus, the optional 0.1-3mm of the degree of depth of this sulculus, the optional 0.2-2mm of the width of sulculus.

Accompanying drawing 1 is the gas leakage situation schematic representation of existing piston ring;

Accompanying drawing 2 is cross-sectional view of compression ring of the present utility model and piston;

Accompanying drawing 3 is plan structure schematic representation of compression ring of the present utility model and piston;

Accompanying drawing 4 is that compression ring of the present utility model and casing wall mesh local enlarged diagram.

Referring to accompanying drawing 1, among the figure 1 is cylinder liner, the 2nd, piston, the 3rd, first road compression ring, the 4th, the annular groove interval, 5 is second road compression rings, when the cylinder igniting, when air pressure promotes descent of piston, the pressurized gas in the cylinder will be along the direction of arrow from compression ring opening 6 on 3 drain to annular groove at interval in 4, the opening 7 from the compression ring border, second road 5 down leaks again.Although the opened gap on the compression ring is very little, the expanded by heating post gap is littler, but it is still gapped after all, otherwise compression ring is expanded seizure of piston, since it is so, stagger even will go up the opened gap position of lower air ring, even aerating circuit number again, also can only play to reduce and leak, can not avoid leaking.In the accompanying drawing 28 is last slice compression rings, the 9th, following sheet compression ring, the 10th, the opened gap of last slice compression ring, the 11st, the opened gap of following sheet compression ring, because it is last, following two compression rings are to be contained in in the annular groove, and the opened gap position staggered mutually, the opened gap 10 of above sheet compression ring all blocked by following sheet compression ring 9, when in cylinder, moving, two compression rings will mutual extrusion together, so, can therefrom not leak gas even opened gap is very big yet, realize the self-packing effect of single groove, can make existing 2-3 road compression reduce to 1-2 road compression, and sealability is better, and output power is bigger.Owing in one annular groove, place two compression rings,, two compression rings be installed in existing annular groove so the thickness of these two compression rings should during manufacturing, can reduce half with the thickness that has compression ring now less than the width of annular groove; Existing annular groove width can be doubled again, two existing compression rings are installed in the annular groove of widening; Also existing annular groove width suitably can be increased and simultaneously existing compression ring thickness is suitably reduced.In order to make compression ring have interchangeability, generally the thickness of every compression ring can be made half that is slightly less than the annular groove width.In order to make compression ring that the effect of selflubricating can be arranged when moving, can on the cylindrical of compression ring, have sulculus 12, as shown in Figure 4, the optional 0.1-3mm of the degree of depth of this sulculus, the optional 0.2-2mm of the width of sulculus.Sulculus can form oil groove at work automatically, and the wearing and tearing of compression ring and casing wall are reduced, and also makes sealability better, and in the use, compression ring does not influence proper functioning as make opened gap increase some because of wearing and tearing yet, so also can prolong working life.

Single groove self-sealing piston compression ring of the present utility model has overcome in the prior art must cooperate ability by the twice annular groove Form the shortcoming of sealing, realized that every road annular groove all can form separately sealing and have simple in structurely, it is convenient to make, Good seal performance, the advantages such as the big and long service life of power output are adapted at petrol engine and Diesel engine In be extensive use of.

Claims

1. single groove self-sealing piston compression ring that is contained in the engine piston annular groove, it is characterized in that forming by two opening compression rings, the thickness of each sheet compression ring is slightly less than half of annular groove width, and the opened gap of described two compression rings staggers mutually and is installed in in the annular groove.

2. single groove self-sealing piston compression ring as claimed in claim 1 is characterized in that having sulculus on the cylindrical of compression ring, and the degree of depth of sulculus is 0.1-3mm, and the width of sulculus is 0.2-2mm.