CN2388362Y - Double-torsional anti-rotating complementary piston ring - Google Patents

Abstract

The utility model discloses a double-twist anti-rotating complementary piston ring which is composed of a piece of main ring and a piece of auxiliary ring. One side of the main ring is a circular elliptical inner boss shoulder, and one side of the auxiliary ring is a circular elliptical shoulder. The openings of the main and the auxiliary rings are staggered for 180 DEG, and concave and lug boss shoulders of the two rings are mutually pitted to form a piston ring. The utility model has the advantages of double sealing, good air tightness, oil scraping capacity enhancement, fuel oil and machine oil saving, long service life, etc., and the main and the auxiliary rings can be prevented from rotating correspondingly. The utility model is suitable for machines and devices adopting the piston ring such as an internal combustion engine, an air compressor, etc.

Description

Two distortion anti-rotation complementary piston rings

The utility model relates to the piston ring of cylinders such as a kind of internal-combustion engine, air compressor.

The conventional piston ring is when work, gas at first flows in the gap of casing wall and piston space from the firing chamber, enter the back clearance of ring through the sideshake of ring, the gas that accumulates in whole ring back enters the cylinder wall and the piston clearance of main below by the opened gap of ring, thereby encircles the central core of circulation that opened gap becomes leakage.In addition, when work, because the up-down vibration of piston ring, oil gas also can leak through the path of gap formation everywhere.For general internal-combustion engine, air pressure is original 25% behind ring together, falls into 10% behind two road rings, 5% (referring to railway publishing house " piston ring ") behind three road rings.Along with cylinder sleeve, wear of piston-rings, the ring opened gap becomes greatly gradually in addition, and air leakage increases, and horsepower descends, until not using.In addition, each road ring opening when mounted staggers, to avoid combustion gas directly to spray into down the opening that encircles together and increase air leakage from the last opening that encircles together, and, each road ring rotates in cylinder gradually because of the impact of vibrations and gas in the course of the work, causes eventually to occur upper and lower bipassage ring register phenomenon in use for some time, does not have method after the register again and staggers again, at this moment scurry oil, gas blowby sharply increases, serious can not use.

The purpose of this utility model provides a kind of double seal, and tightness is good, can prevent that major and minor ring from relatively rotating, and improves the frizing ability, the two distortion anti-rotation complementary piston rings that increase the service life.

For achieving the above object, this piston ring is made up of a slice main ring and a slice inner loop, this piston ring:

Main ring one side is arranged to the oval protruding interior shoulder of annular;

Inner loop one side is arranged to annular oval indent shoulder;

The opening of described major and minor ring staggers 180 °, and the recessed and boss shoulder phase ridge of two rings constitutes piston ring one.

The piston ring of said structure is that following advantage is arranged:

1, good air-tightness.Main ring and inner loop opening stagger 180 ° when mounted, thereby the combustion gas under scurrying from a last Room can not directly enter next chamber from the main ring opening, but enter next chamber through the opening of inner loop around the back clearance of ring and annular groove, avoided pressurized gas directly to enter next chamber, played the labyrinth sealed effect from the opening of ring.In piston high speed to-and-fro motion process, blast, the compression stroke time is all very short, and exhausted most gas also is not able to do in time to flow to next chamber through the inner loop opening after taking an unnecessary way, and the air pressure of a last Room has been lower than this chamber, gas produces adverse current, thereby air leakage significantly reduces after labyrinth sealing, effectively improves the compression ratio of cylinder, makes burning more abundant, horsepower rises, save fuel oil, reduce the harmful matter in the waste gas, increase the service life.

2, double seal effect.For the tradition ring, when work,, cause piston ring excircle local location and casing wall moment disengaging and produce and leak because there are radial vibration in gas percussion and mechanical vibration, the high speed internal-combustion engine is particularly serious; And two distortion rotation inhibiting complementary piston rings are combined by major and minor ring, because the randomness of radial vibration, vibrative on one point probability is very little simultaneously for major and minor ring, even thereby wherein a slice produced to leak and also can't scurry another sheet, played good double seal effect.

3, prevent that major and minor ring from acting in relative rotation.In order to ensure labyrinth sealing, must guarantee that the opening of major and minor ring is not overlapping, otherwise will be the same with the tradition ring after overlapping, can't play labyrinth sealing.We are designed to ellipse with the shoulder of major and minor ring for this reason, and these two elliptic curves have complementarity, when two ring openings stagger 180 the time, gap between two shoulders (being distance between shoulder) is same for each point, the gap of two shoulders can diminish when two rings relatively rotate, when turning over several angle (being generally 30-40) post gap is zero can't the rotation, therefore major and minor ring opening can't overlap forever, make and the existing good sealing property of two distortion rotation inhibiting complementary piston rings can increase the service life again.

4, frizing characteristics.The passage that machine oil rises has two: the one, along the slip surface of cylinder and ring; The 2nd, by the gap of ring with annular groove, the back side of circuitous ring.For two distortion rotation inhibiting complementary piston rings, primary and secondary ring is the unsymmetrical section ring, is twisted state in cylinder, primary and secondary ring tilts in annular groove, its upper and lower end face contact ring groove has stoped on the circuitous back side of encircling of machine oil to rise, and therefore can reduce the consumption of machine oil; Major and minor in addition ring plays knife-type oil stripping action respectively twice, can reduce consumption of lubricating oil to greatest extent.

Comprehensively described, it is good that two distortion rotation inhibiting complementary piston have an air-tightness, characteristics such as long service life, comparatively speaking, a revolution on the motor history beyond doubt.At first, good sealing can make the compression ratio of firing chamber improve, and makes burning more abundant, and explosive power is stronger, the fuel oil of burning as much, horsepower rises, and promptly means and has saved fuel oil, and because burning is more abundant, harmful gas reduces in a large number in the waste gas that gives off, and helps environmental protection; In addition because after the piston-cylinder wearing and tearing, horsepower is held stationary still, prolong greatly working life on the one hand, played the effect of saving fuel oil on the other hand, because the tradition ring is along with the change high-power of opened gap descends more and more obvious, particularly serious in old machine, behind the two distortion of the employing rotation inhibiting complementary piston rings, generally can save 8～10%; Engine oil consumption descends 30～50%.

Generally speaking, behind the two distortion of the employing rotation inhibiting complementary piston rings, from macroscopic view following advantage is arranged: 1. horsepower rises; 2. save fuel oil machine oil; 3. grade ability is strong; 4. starting easily; 5. reduce environmental pollution; 6. prevent gas blowby lubricating oil carry-over phenomenon; 7. increase the service life.

Below in conjunction with accompanying drawing, the utility model is carried out a step explanation.

Fig. 1 is the utility model main ring plan view.

Fig. 2 is Fig. 1 sectional view.

Fig. 3 is the utility model inner loop plan view.

Fig. 4 is Fig. 3 sectional view.

Fig. 5, Fig. 6 are piston ring plan view and the plan view that major and minor ring constitutes.

As can be known, the upside of main ring 1 is annular oval convex shoulder 2 from Fig. 1 and Fig. 2; The thickness of this shoulder 2 from opening along both sides to 180 degree relative with opening, thicken by thin gradually, form an oval convex shoulder of annular, the interior circle of ring is constant.

As can be known, the upside of inner loop 3 is annular oval indent shoulders 4 from Fig. 3 and Fig. 4; These shoulder 4 width from opening along both sides to 180 degree relative with opening, narrow by reductions gradually, form an oval indent shoulder of annular, the interior fenestra of ring is constant.

In Fig. 5 and Fig. 6, the opening of major and minor ring 180 degree that stagger, the boss of the main ring shoulder 2 and the concave station of inner loop are takeed on 4 banks mutually, constitute piston ring one.

Claims (1)

1, a kind of two distortion anti-rotation complementary piston ring is characterized in that being made of this piston ring a slice main ring and a slice inner loop:

Main ring one side is arranged to annular oval convex shoulder;

Inner loop one side is arranged to annular oval indent shoulder;

The opening of described major and minor ring 180 degree that stagger, the protruding and concave station shoulder phase ridges of two rings constitute piston ring one.

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