CN2353904Y

CN2353904Y - High-level-sealing piston assembly

Info

Publication number: CN2353904Y
Application number: CN 98233062
Authority: CN
Inventors: 王耀磊
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-09
Filing date: 1998-10-09
Publication date: 1999-12-15
Anticipated expiration: 2008-10-09

Abstract

The utility model relates to a high-level-sealing piston assembly. The piston is provided with an oil ring groove which is provided with an oil ring and a gas ring groove which is provided with a gas ring. The gas ring is a sealing ring; both ends of an opening part are inserted mutually concavely and convexly, are sealed, and are matched. The utility model is not affected by wear of the member, the tightness is good, the service life is long, the work efficiency of engines and compressors can be increased.

Description

The high sealing piston assembly

The utility model relates to a kind of high sealing piston assembly.

At present, the piston assembly of large-scale chiller plants such as domestic and international vapour, diesel engine and reciprocating piston type air compressor, air conditioner, its seal gas ring all adopts the mode of structure of a groove one ring.For preventing the seal ring cylinder that after being heated, rises, all be provided with opened gap, sideshake and back clearance on the ring, and the open end of compression ring is flat mouthful.In use, the external diameter of compression ring and cylinder inner wall can produce friction, after the use regular period, cylinder bore diameter can increase because of wearing and tearing, and the compression ring external diameter can dwindle because of wearing and tearing, under the effect of compression ring self elastic force, compression ring is expanding, thereby the opened gap of compression ring is increased.Piston ring gap clearance compression increases, one, and motor is collaborated generation, and string oil reduces cylinder pressure, and fuel oil increases, and engine operation efficient reduces; Fuel oil is insufficient also can to cause atmospheric pollution.Its two, compression ring will further increase the weight of both wearing and tearing to the cylinder inner wall expanding, and shortened the working life of motor.For preventing snap ring, existing compression all leaves sideshake, and then compression ring can produce in the course of the work and beat, and this not only makes compression produce wearing and tearing, and sideshake increases, and also will increase the wearing and tearing of compression ring and cylinder.In the high speed to-and-fro motion, beating of compression ring also will make gas and gasoline enter in the crankcase to back clearance by the sideshake string, and the oil lubricating performance is gone down, and causes machine members such as bent axle and bearing shell.Generally, motor is at cylinder wear 0.12mm, and piston ring gap clearance compression weares and teares greater than 1.0～1.5mm, and when the machine oil loss was lower than a gear with fuel oil than 5% power, motor was promptly wanted overhaul.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and provides a kind of component wear that is not subjected to influence, good seal performance, and long service life can improve the high sealing piston assembly of motor and compressor operating efficient greatly.

The purpose of this utility model can reach by following measure:

A kind of high sealing piston assembly has oil ring groove (3) that oil ring is set and the compression (2) that compression ring (4) are set on its piston (1), its special way is: described compression ring (4) is the uneven seal ring that is sealed and matched of opening two ends.

In the compression of the present utility model (2) ripple shell fragment (13) can be set.

Compression ring of the present utility model (4) also can comprise another compression ring spare, and the outside of its opening one termination is provided with the boss (5) that protrudes along hoop, and the inboard of this termination forms concave station (6); The interior outside of its other end is respectively equipped with and described boss (5), the uneven concave station that cooperates of concave station (6) (7) and boss (8).

The boss (9) and the concave station (10) of upper and lower uneven cooperation can be set respectively on the boss (5) outside compression ring of the present utility model (4) opening, two ends, the concave station (7).

A compression ring spare of compression ring of the present utility model (4), its opening two ends are respectively equipped with boss (11), the concave station (12) of upper and lower uneven cooperation.

The accompanying drawing drawing is described as follows:

Fig. 1 is the utility model structure of piston schematic representation:

Fig. 2～4 are respectively the structural representation of the utility model compression ring;

Fig. 5 is the utility model one embodiment's an overall structure schematic representation.

The utility model is described in further detail below in conjunction with drawings and Examples:

Referring to Fig. 1, has the compression 2 that 3, one of an oil ring groove that oil ring is set is provided with compression ring 4 on the piston 1 of the present utility model.Compression ring 4 is the uneven seal rings that are sealed and matched of opening two ends.In the compression 2 compression ring 4 with two way sealed structure can be set, referring to Fig. 2, promptly at the opening of compression ring 4, the outside of its termination is provided with the boss 5 that outwards protrudes along the direction of ring, the then corresponding concave station 6 that caves inward along the direction of ring that forms in the inboard of this termination; At the other end of compression ring 4 openings, in it outside be respectively equipped with along the direction of ring concavo-convex and with described boss 5 and concave station 6 concave station 7 and the boss 8 that close of scarf mutually, this forms the sealing of first direction.On the boss 5 in the compression ring 4 opening two ends outsides, concave station 7, can be provided with respectively along the upper and lower of ring concavo-convex to uneven cooperation, be about to boss 9, concave station 10 that upper and lower phase scarf closes, be divided on the above and below of boss 5, concave station 7, form the sealing of second direction.Two compression rings also can be set in the compression 2 of the present utility model, be that compression ring 4 is made of two compression ring spares, wherein the opening two ends of a compression ring are respectively equipped with along the concave station 7 and the boss 5 of the uneven cooperation of direction of ring, see Fig. 3, the opening two ends of another compression ring then are respectively equipped with along concave station 12 and the boss 11 of the upper and lower that encircles to uneven cooperation, see that Fig. 4, Fig. 3, compression ring shown in Figure 4 also can use separately, but use together to good with the two, and when using together, the opening position of two compression rings is assembled into good to interlock.Beat for guaranteeing that compression ring does not produce in the course of the work, can in compression 2, set up ripple shell fragment 13, see Fig. 5.Compression ring 4 of the present utility model also can be made of a plurality of compression ring spares.

The utility model compared with prior art has following advantage:

1, good seal performance, the order sealing property is not subjected to the impact of component wear;

2, improve cylinder pressure, greatly strengthened the operating efficiency of engine;

3, save machine oil, fuel oil, reduced air pollution;

4, component wear is little, long product lifecycle, and under same material and equal process conditions, product Can prolong service life more than three times;

5, sealing range is big, and maintenance rate reduces greatly, thereby has saved a large amount of maintenance costs.

Claims

1, a kind of high sealing piston assembly has oil ring groove (3) that oil ring is set and the compression (2) that compression ring (4) are set on its piston (1), it is characterized in that: described compression ring (4) is the uneven seal ring that is sealed and matched of opening two ends.

2, high sealing piston assembly as claimed in claim 1 is characterized in that: be provided with ripple shell fragment (13) in the described compression (2).

3, high sealing piston assembly as claimed in claim 1 or 2 is characterized in that: described compression ring (4) comprises a compression ring spare, and the outside of its opening one termination is provided with the boss (5) that protrudes along hoop, and the inboard of this termination forms concave station (6); The interior outside of its other end is respectively equipped with and described boss (5), the uneven concave station that cooperates of concave station (6) (7) and boss (8).

4, high sealing piston assembly as claimed in claim 3 is characterized in that: the boss (9) and the concave station (10) that are respectively equipped with upper and lower uneven cooperation on the boss (5) outside described compression ring (4) opening, two ends, the concave station (7).

5, high sealing piston assembly as claimed in claim 3 is characterized in that: another compression ring spare of described compression ring (4), its opening two ends are respectively equipped with boss (11), the concave station (12) of upper and lower uneven cooperation.