CN2428586Y

CN2428586Y - Fitting structure of cyliinder and piston

Info

Publication number: CN2428586Y
Application number: CN 00241233
Authority: CN
Inventors: 刘振虎; 付振庄
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-15
Filing date: 2000-06-15
Publication date: 2001-05-02
Anticipated expiration: 2010-06-15

Abstract

The utility model relates to a fitting structure of a cylinder and a piston. The utility model comprises a cylinder, a piston and piston rings. The utility model is characterized in that at least one ring groove of the piston is provided with two piston rings, and the openings of the two or more than two piston rings are staggered. Therefore, the openings of the piston rings causing the air leakage and pressure reduction of a combustion chamber are closed, and the disadvantage of the combustion chamber having poor sealing property as a result of the enlarged openings of the piston rings due to abrasion is avoided. The relatively stable and closed combustion chamber is formed, combustion environment in the cylinder can not become bad with the abrasion of the cylinder and the piston rings, and thus the service life of an internal combustion engine is prolonged.

Description

The cooperating structure of cylinder barrel and piston

The utility model relates to the cooperating structure of a kind of cylinder barrel and piston, is particularly suitable for the cylinder barrel of internal-combustion engine and cooperating of piston.

At present, existing internal-combustion engine, as diesel engine, in use for some time, its airtight burning situation progressively reduces, and seal degree is more and more littler.Influencing more serious wearing and tearing has cylinder barrel to lose that circle, cylinder bore become big, piston ring groove broadens, piston ring diminishes, encircle the opening increase.Along with the use of machine, following drawback will appear in the continuous increase of gap-clearance of piston rings: 1. the pressure of compression stroke generation is little, and temperature is low, the machine startup difficulty; Oil consumption is big, and horsepower is not enough, and the thermal efficiency reduces.2. scurry on the machine oil, burn oil, after leak serious, oily temperature rise, influence is lubricated, quickens the aging and component wear of machine oil.Because the appearance of above problem and constantly aggravation make machine enter the overhaul phase in advance.

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art, and the cooperating structure of a kind of cylinder barrel and piston is provided, and eliminates owing to wearing and tearing make gap-clearance of piston rings become the drawback of the combustion chamber sealing difference of bringing greatly, thereby prolongs the working life of machine.

The purpose of this utility model realizes by following technical proposals:

The cooperating structure of a kind of cylinder barrel and piston has cylinder barrel, piston, piston ring, and two piston rings are installed at least one annular groove that its technological scheme is described piston at least, and described its opening of two or more piston rings staggers.

In the technique scheme, in 3 annular grooves of piston two piston rings are installed at least all, described two or more piston ring is to be set in side by side in each annular groove of piston, the interior piston ring of each annular groove that is set in piston side by side can be two piston rings, and the angle that the opening of piston ring staggers is preferably 180 °.In above-mentioned two or more piston ring, be set with interior ring in one of them piston ring, the opening of this piston ring and interior ring staggers, the piston ring number can be two, be set with interior ring in one of them piston ring, the angle that two piston rings, interior ring three openings stagger is preferably 120 °.

The utility model is owing to be equipped with two piston rings at least at least one annular groove of described piston, and described its opening of two or more piston rings staggers.Like this, it is the gap-clearance of piston rings " locking " that causes firing chamber gas leakage decompression, eliminated owing to wearing and tearing make gap-clearance of piston rings become the drawback of the combustion chamber sealing difference of bringing greatly, make the firing chamber form a metastable airtight firing chamber, make the burning situation in the cylinder barrel can be with cylinder barrel, wear of piston-rings and become bad, thereby prolonged the working life of internal-combustion engine, make its optimum working state improve major step, (with the diesel engine is example as Fig. 1, old and feeble curve of the performance of existing diesel engine and the old and feeble curve comparison diagram of performance that adopts diesel engine behind the utility model) shown in, adopt the performance of diesel engine behind the utility model obviously to be better than control group (existing diesel engine).The old and feeble situation of diesel engine depends on the working life of cylinder barrel, piston and piston ring behind employing the utility model.When the elastic force of piston ring be not enough to seal or piston ring scuffing to can not resist the crunch that burning produces the time till.In view of this, the old and feeble time of the machine that the utility model prolonged is appreciable.

The utility model is described in further detail below in conjunction with embodiment:

Fig. 1 is for being example with the diesel engine, the old and feeble curve of the performance of existing diesel engine with adopt the old and feeble curve comparison diagram of diesel engine performance behind the utility model.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is along the sectional view (first embodiment) of A-A line among Fig. 2.

Fig. 4 is the structural representation of two piston rings arranged side by side among Fig. 3.

Fig. 5 is along the sectional view (second embodiment) of A-A line among Fig. 2.

Fig. 6 is two piston rings arranged side by side and the interior structural representation that encircles among Fig. 5.

As shown in Figure 1, T express time (year), Q presentation technology standard, Q ₁The overhaul threshold state of presentation technology standard, Q ₂The optimum working state of presentation technology standard, curve a represents the old and feeble curve of the performance of existing diesel engine, curve b represents to adopt the old and feeble curve of performance of diesel engine behind the utility model.

As Fig. 2, Fig. 3, shown in Figure 4, the utlity model has cylinder barrel 1, piston 2, piston ring 3.In 3 annular grooves of described piston 2 two

piston rings

31,32 are installed all, per two piston rings the 31, the 32nd are set in each annular groove of piston 2 side by side, and the opening 31a of piston ring, the angle that 32a staggers are preferably 180 °.Certainly, two piston rings also can be set in together (not drawing among the figure), this moment they be respectively piston ring and in the ring, in be located in the piston ring, piston ring is loaded in the annular groove of piston by inner ring sleeve.Also plural piston ring can be installed all in one or more annular grooves of piston.As Fig. 5, shown in Figure 6, in two

piston rings

31,32, the angle that ring 33, two

piston rings

31,32, interior ring 33 three's opening 31a, 32a, 33a stagger in being set with in one of them piston ring 31 is preferably 120 °.

Claims

1, the cooperating structure of a kind of cylinder barrel and piston, have cylinder barrel, piston, piston ring, it is characterized in that at least one annular groove of described piston (2) two piston rings (3) being installed at least, its opening of described two or more piston rings (3) staggers.

2, the cooperating structure of cylinder barrel according to claim 1 and piston, it is characterized in that in 3 annular grooves of above-mentioned piston (2) two piston rings (3) being installed at least all, described two or more piston rings (3) are to be set in side by side in each annular groove of piston (2).

3, the cooperating structure of cylinder barrel according to claim 2 and piston, it is characterized in that in above-mentioned two or more piston ring (3), be set with interior ring (33) in one of them piston ring (31), this piston ring (31) staggers with opening (31a), (33a) of interior ring (33).

4, the cooperating structure of cylinder barrel according to claim 2 and piston, it is characterized in that the above-mentioned interior piston ring (3) of each annular groove that is set in piston (2) side by side can be two piston rings (31,32), the angle that the opening (31a, 32a) of piston ring (31,32) staggers is preferably 180 °

5, the cooperating structure of cylinder barrel according to claim 3 and piston, it is characterized in that above-mentioned piston ring (3) number can be two, be set with interior ring (33) in one of them piston ring (31), the angle that two piston rings (31,32), interior ring (33) three's opening (31a, 32a), (33a) stagger is preferably 120 °.