CN2479230Y

CN2479230Y - Double-sealed piston ring

Info

Publication number: CN2479230Y
Application number: CN 01240173
Authority: CN
Inventors: 沈延; 聂小军; 梁桓炎; 邹广南
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-25
Filing date: 2001-05-25
Publication date: 2002-02-27
Anticipated expiration: 2011-05-25

Abstract

The utility model provides a complementary and double-sealed piston ring. The piston ring is combined by a slice of an outer-shoulder main-ring and a slice of rectangle secondary-ring, and an included angle alpha is formed by the outer shoulder and the end face. Further a location nail can be welded or pasted on the shoulder of the main-ring or the shoulder of the main-rain and the inner circle of secondary ring are processed into an inter-corresponding eccentric circle, thereby avoiding the relative rotating in the course of the operation of the main and the secondary rings. The complementary and double-sealed piston ring of the utility model has the advantages of good property of air-tightness and long service life. Owing to the good function of double-layer sealing, the air pressure inside a cylinder is higher than the common piston rings, thereby having the effect of pressure boosting, and further the horsepower soups up obviously compared with the same condition, the fuel oil is saved and the waste-heat discharging is reduced.

Description

Double-sealing complementary piston ring

The utility model is to be used for the machine that need such as internal-combustion engine, air compressor adopt piston rings to seal, a kind of novel double-sealing complementary piston ring on the device.

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 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, combustion gas also can be leaked 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, is 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, up to not using.In addition, be equipped with the road ring when mounted opening stagger, 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, but each road ring rotates in cylinder gradually because of the impact of vibrations and gas in the course of the work, cause eventually and occur upper and lower bipassage ring register phenomenon in use for some time, and can't stagger again after the register, at this moment scurry oil, gas blowby sharply increases, serious can not use.

It is good that the purpose of this utility model provides a kind of air-tightness, and the double seal effect is arranged, the double-sealing complementary piston ring of long service life.

The utility model is combined as piston ring one by the outer shoulder ring (calling main ring in the following text) of a slice and a slice rectangular ring (calling inner loop in the following text), and outer shoulder and the end face α that has angle.In addition, produce gas blowby, scurry oil in order to prevent that major and minor in the course of the work ring opening from overlaping, can on the main ring shoulder, burn-on or be stained with locating pin 7 or circle in main ring shoulder, the inner loop is processed in correspondence with each other eccentric circle, produce relative rotation in the course of the work to prevent major and minor ring.

Owing to taked above technical measures, this double-sealing complementary piston ring has good air-tightness, characteristics such as long service life.Because air-tightness is good, the air pressure in the cylinder has played the effect of supercharging greater than the pot type piston ring, and situation has tangible lifting for following horsepower on year-on-year basis, saves fuel oil, reduces toxic emission.In addition, the locating pin of on the main ring shoulder, burn-oning or circle in main ring shoulder, the inner loop is processed into corresponding eccentric circle, can prevent effectively that major and minor ring from producing relative rotation down in working order, avoided major and minor ring opening to overlap, strengthened tightness, play good double seal effect, prolonged working life.In addition, the opening form of main ring can change into takes degree of lip-rounding formula, and then effect is better.

Elaborate below in conjunction with accompanying drawing.

Fig. 1 is the main ring structural representation;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is the inner loop structural representation;

Fig. 4 is the B-B view of Fig. 3;

Fig. 5 is combined into the structural front view of one ring for major and minor ring;

Fig. 6 is the sectional view of Fig. 5;

Phase diagram when Fig. 7 does not have the α angle for the main ring shoulder under in working order;

Phase diagram when Fig. 8 cuts out the α angle for the main ring shoulder under in working order;

Fig. 9 is the burn-on structural front view of locating pin of main ring shoulder;

Figure 10 is the sectional view of Fig. 9.

Major and minor ring composite structure plan view when Figure 11 has locating pin for main ring;

Figure 12 is the sectional view of Figure 11;

Figure 13 is processed into the structural front view of eccentric circle for the main ring shoulder;

Figure 14 is the sectional view of Figure 13;

Figure 15 is processed into the structural front view of eccentric circle for circle in the inner loop;

Figure 16 is the sectional view of Figure 15;

Figure 17 is the composite structure schematic representation of Figure 13, major and minor ring shown in Figure 15;

Figure 18 is the sectional view of Figure 17;

Figure 19 is the main ring structural front view of taking degree of lip-rounding formula.

Figure 20 is the plan view of Figure 19.

Structure of the present utility model is: the main ring 1 by the outer shoulder of a slice band is combined as piston ring with a slice rectangle inner loop 2, and the outer shoulder of main ring and the end face α that has angle.Can burn-on or be stained with anti-rotation locating pin 7 on main ring 1 shoulder, the locating pin position is the arbitrary position on the whole shoulder circumference.Main ring 1 shoulder and inner loop 2 shoulders can be processed into eccentric circle respectively.Main ring 1 opening can be designed to take degree of lip-rounding formula.

Working principle of the present utility model and characteristics:

1, good sealing.Main ring 1 and inner loop 2 openings stagger 180 ° when mounted, thereby the combustion gas under scurrying from a last Room can not directly enter next chamber from main ring opening 3, have avoided pressurized gas directly to enter next chamber from the opening of ring, play the labyrinth sealed effect.In piston 5 high speed to-and-fro motion processes, blast, the compression stroke time is very short, exhausted most gas also is not able to do in time to flow to next chamber through inner loop opening 4 after taking an unnecessary way, and the air pressure of a last Room has been lower than this chamber, and gas produces adverse current, thereby air leakage significantly reduces after labyrinth sealing, can effectively improve the compression ratio of cylinder 6, make burning more abundant, horsepower rises, save fuel oil, reduce toxic emission, increase the service life.

2, double seal effect.For the tradition ring, when work, because gas percussion and mechanical vibration, there is radial vibration, cause piston ring excircle local location and casing wall moment disengaging and produce and leak, the high speed internal-combustion engine is particularly serious, and the major and minor vibrative on one point probability of ring while of novel complementary piston ring is very little, thereby promptly use wherein a slice to produce to leak and also can't scurry another sheet, play good double seal effect.

3, the effect of the α angle on the shoulder.Because main ring is outer shoulder ring, stress effect meeting produces distortion when work, if the main ring shoulder does not have the α angle, then working state such as Fig. 7, can't be close to sealing between the major and minor ring, inner loop can't carry out balanced support to main ring, be easy to generate gas blowby, scurry oil, main ring produces a radial pressure to inner loop in addition, inner loop can't freely be opened flexibly, can not follow casing wall well, for piston ring, the tracing ability of casing wall has been determined the quality of sealability, thereby the sealing of complementary ring can be had a greatly reduced quality also; Main ring is inconsistent because of distortion to the radial force that inner loop produces in addition, and differ bigger, with main ring opening subtend maximum, can cause the inner loop irregular wear, the local generation fast of inner loop worn and torn, and other position wear extent seldom, make inner loop lose seal action on the one hand, the irregular wear of inner loop has also reduced the working life of a whole set of ring in addition, thereby can be according to the characteristics of various rings, on the main ring shoulder, cut out different α angles, make it to be close to sealing (as Fig. 8) with inner loop in working order, sealability is greatly improved, and main ring has also been eliminated the irregular radial pressure of inner loop in addition.

Claims

1, a kind of sealing complementary piston ring comprises main ring, inner loop, it is characterized in that: main ring (1) and a slice rectangle inner loop (2) by the outer shoulder of a slice band are combined as piston ring one, and main ring shoulder and the end face α that has angle outward.

2, piston ring according to claim 1 is characterized in that: can burn-on on main ring (1) shoulder or be stained with anti-rotation locating pin (7), the locating pin position is the arbitrary position on the whole shoulder circumference.

3, piston ring according to claim 1 is characterized in that: main ring (1) shoulder and inner loop (2) shoulder can be processed into eccentric circle respectively.

4, piston ring according to claim 1 is characterized in that: main ring (1) opening can be designed to take degree of lip-rounding formula.