CN2055549U

CN2055549U - Combined non-clearance piston ring

Info

Publication number: CN2055549U
Application number: CN 89210639
Authority: CN
Inventors: 徐福满
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-06-17
Filing date: 1989-06-17
Publication date: 1990-04-04

Abstract

The utility model relates to a combined type piston ring. The combined type piston ring is composed of three parts of an inner ring, a trapeziform opening ring, and an annular opening sealing pad. The air ring is adopted, the air leakage of the air ring of the cylinder of the internal-combustion engine can be effectively prevented, mechanical efficiency is improved, oil consumption is reduced, and the effective power output of the internal-combustion engine is increased. The combined type piston ring is especially suitable for being used by a plurality of internal-combustion engines whose cylinders and pistons are seriously abraded during long time running to cause the air leakage amount of the cylinders increased. The part performance of the combined type piston ring can be improved, and the service life of the combined type piston ring can be extended.

Description

Combined non-clearance piston ring

The utility model is a kind of internal-combustion engine piston ring.

Piston ring is the vitals that keeps cylinder and piston space sealing, because there is opening in piston ring, therefore compresses and breaks out the gas that is compressed in two strokes and burns and can leak from opening at cylinder, causes so-called normal gas leakage.But piston ring is worked under high temperature, high pressure, high speed and lubricated hard situation, and the opening that the continuous firing of internal-combustion engine makes the wearing and tearing of piston ring excircle face and cylinder bore diameter be directed at piston ring increases and then increase air leakage.This gas leakage increases makes internal-combustion engine produce incomplete combustion, burn oil, and Mao Lanyan is difficult for phenomenons such as starting.The power of internal-combustion engine also will descend, and fuel consumption increases.Therefore the opening that reduces piston ring is to improve internal-combustion engine useful horsepower, reduces oil consumption, prolongs the internal-combustion engine important key in working life.

The purpose of this utility model is a kind of compound piston ring of design, use this piston ring, can guarantee the excellent sealing between piston and cylinder, even and piston ring is under the serious situation of wearing and tearing, still can effectively prevent the gas leakage of gap-clearance of piston rings, improve the efficient of internal-combustion engine, promptly increase the service life, also reduced fuel consumption.

The utility model compound piston ring is by encircling in the elasticity, and stepped shaft trip ring and loop seal pad three parts are formed.Combine as shown in Figure 1.Wherein 1, ring in the elasticity; 2, stepped shaft trip ring; 3, loop seal pad.

Ring 1 is to be made by high temperature resistant elastic material (for example clockwork spring steel disc) in the elasticity, ring 1 is wide identical with stepped shaft trip ring 2 width in the elasticity, the thickness of ring 1 can not be excessive in the elasticity, in order to avoid influence the degree of depth that the stepped shaft trip ring is put into piston groove, but should have enough intensity, its thickness is that 0.20 millimeter is advisable, and interior ring 1 has the opening of one 2～3 mm wide.

Stepped shaft trip ring 2 is by the transformation of the way of common piston ring, the opening of its piston ring as shown in Figure 2,4,5 is trapezoidal faces among Fig. 2.Trapezoidal faces the 3, the 4th is respectively removed 1/2 ring width with the two ends of common compression ring, and its tread length is 5～10 millimeters.The long too small loop seal pad of tread is too short, and piston ring actual life is short, and the loop seal pad is difficult for fixedly securing on its opening section, but tread is long excessive, its tread processing difficulties, and the intensity of trip ring 2 also has certain attenuating.

Loop seal pad 3 is also by the pot type piston ring transformation of the way, as 1/2 ring width is removed at the two ends of stepped shaft trip ring, is long one sections of 2 times of treads removing intercepting arc length on the common compression ring of 1/2 ring width.Loop seal pad 3 is placed on the opening of trapezoid-shaped openings ring 2,, forms a compression ring outer shroud as Fig. 3.

With above-mentioned, interior ring 1, it promptly is compound piston ring of the present utility model that trapezoid-shaped openings ring 2 fits together with loop seal pad 3, but the opening of ring 1 should be installed with the interleaved openings of trapezoid-shaped openings ring 3 in it should be noted that, generally is that two openings are installed relatively.

The utility model compound piston ring can prevent gas leakage effectively, and its reason is very simple.Common compression ring is owing to there is an opening, so gas can leak.But the opening of compound piston ring is owing to there is loop seal pad 3, stop gas to pass through, though trapezoid-shaped openings ring 2 after the transformation of the way and loop seal pad 3 two ends many two little openings, but all stopped, can prevent that gas from passing through simultaneously by the trapezoid-shaped openings face.Along the gas that opening direction leaks, therefore the outer wall of ring 1 in will running into also can avoid gas to leak from this direction.

In addition, adopt compound piston ring,, can change pot type piston into combined gas ring one with three road compression rings, therefore can reduce the height of piston, promptly improve guidance quality the cylinder volume is reduced owing to can prevent gas leakage effectively.Use this compound piston ring, can be described further by embodiment the performance of improving internal-combustion engine.

Embodiment

Compare experiment with diesel engine (power is 2.43 kilowatts, and rotating speed is 2600 rev/mins).

1, former machine 2600r/min part throttle characteristics and mechanical efficiency are measured;

2, former machine is torn open the machine repacking, adorned compound piston ring one, two, three roads are not adorned, and 2600r/min part throttle characteristics and mechanical efficiency are measured, its result such as table 1

	Rate of fuel consumption under the operating condition of test (8/dwh)						Friction horsepower Pm (kw)	Mechanical efficiency η m (%)
									25％ 0.61kw	50％ 1.21kw	75％ 1.92kw	90％ 2.81kw	100％ 2.43kw	110％ 2.67kw
	Former machine	573.8	366.5	301.4	287.2	278.8									282.4	1.34	64.5
Original-assemblied machine							532.0	352.9	300.7	281.1	278.2	298.9	1.19	67.2

From above-mentioned comparative trial, adopt compression ring of the present utility model on the different load characteristic, can accomplish the reduction oil consumption, preferable fuel-economizing absolute value 41.8 the gram/kilowatt-hour, its fuel saving ratio can reach 7.28%.The friction horsepower of internal-combustion engine can descend simultaneously, has increased the useful horsepower output of diesel engine like this.In addition, this compound piston ring is particularly suitable for some internal-combustion engines and causes the cylinder leakage tester amount of internal-combustion engine to increase through long-time running, cylinder and wearing for piston, influence under the situation of useful horsepower output to adopt, and can be apt to partial properties, prolongation internal-combustion engine working life.

Claims

1, a kind of piston ring, it is characterized in that this compression ring is by the interior ring 1 that has opening, its opening trapezoid-shaped openings ring 2 and loop seal pad 3 three parts in echelon, air ring mouth pad 3 is placed on the opening of trapezoid-shaped openings ring 2, and interior ring 1 is placed on and combines in the ring of trapezoid-shaped openings ring 2.

2, according to the described piston ring of claim 1, it is characterized in that ring 1 is by high temperature resistant elastic material in it, stalloy is made, and its thickness is 0.20 millimeter.

3, according to the described piston ring of claim 1, the opening that it is characterized in that its trapezoid-shaped openings ring 2 is a trapezoidal faces, and the length of trapezoidal faces is 5～10 millimeters.

4, according to the described piston ring of claim 1, the arc length that it is characterized in that its loop seal pad 3 is that 2 times of treads are long.