CN203594523U

CN203594523U - Piston

Info

Publication number: CN203594523U
Application number: CN201320831770.1U
Authority: CN
Inventors: 潘荣国
Original assignee: ZHEJIANG DONGXIN DYNAMICAL CO Ltd
Current assignee: ZHEJIANG DONGXIN DYNAMICAL CO Ltd
Priority date: 2013-12-17
Filing date: 2013-12-17
Publication date: 2014-05-14
Anticipated expiration: 2023-12-17

Abstract

The utility model relates to a piston which comprises a piston body. A gas ring groove is formed in the piston body, the gas ring groove is provided with a reinforcing layer and a wear resistant layer from inside to outside, a triangular groove is formed in one side, away from the reinforcing layer, of the wear resistant layer, and the triangular groove is provided with a piston ring in a matched mode. Due to the fact that the gas ring groove of the piston body is provided with the reinforcing layer and the wear resistant layer from inside to outside, the wear resistant layer is integrated with the piston body through the reinforcing layer to be more stable, impact wear between the piston ring and the gas ring groove is small through the wear resistant layer, the service life of the piston is long, work efficiency of an engine is high, performance is better, and the accidents like blow-by are greatly reduced. The triangular groove and the piston ring matched with the triangular groove are arranged on one side, away from the reinforcing layer, of the wear resistant layer, the slope face of the triangular groove eliminates gaps generated through assembling, so that the piston ring is more firmly attached to the gas ring groove, impact force of the piston in the up and down moving process is prevented from being concentrated at the corners of the ring groove, the service life of the piston is further prolonged, and work efficiency of the engine is improved.

Description

A kind of piston

Technical field

The utility model belongs to mechanical technical field, particularly a kind of by wear-resistant parts and structure being set to reduce the wearing and tearing of piston ring groove and piston ring and then to reach the piston of the Efficient Operation of motor.

Background technique

Piston is the central position of motor, in engine operation, account for extremely important status, it generally comprises firing chamber, annular groove portion (compression and oil ring groove), cooling oil duct, piston skirt, piston pin hole, piston pin hole connects after connecting rod by wrist pin, connects bent axle in connecting rod lower end.When pistons work, after fuel combustion blast in firing chamber, produce huge pressure and promote piston, because wrist pin connects connecting rod, make connecting rod promote crankshaft rotating, in the time that crankshaft rotating arrives certain degree, this cylinder pressure exhausts, thrust by other cylinder piston makes this cylinder get back to starting point, continues running next time.

The immense pressure producing after fuel combustion blast in firing chamber directly affects the size of engine output, therefore cylinder must seal, the method that general sealing is taked is that the gap that reduces compression and cylinder wall by compression ring guarantees the sealing between piston and cylinder wall, prevents high-temperature high-pressure fuel gas in the cylinder lower end of cylinder sleeve of bleeding in a large number.

But in the higher motor of heat load, compression is relatively near combustion high temperature district, so the compression temperature of piston is also relatively high in operation, along with the hardness of the rising piston ring material of temperature declines, add piston ring moves up and down in overall piston movement process, more accelerate the impact wear between piston ring and compression, and the wearing and tearing of piston ring and compression can make the fit up gap of piston ring and compression slowly increase, because seal reduces, the power of motor is also along with reduction slowly, in the time that compression and piston ring scuffing were lost efficacy to being assembled together completely, to there is difficulty in starting in motor, underpower, body case pressure raises, ventilation system is seriously smoldered, consumption of lubricating oil increases, blue smoke is emitted in exhaust, firing chamber, the various bad phenomenon such as the serious carbon deposit in the surface such as piston, need to change piston could normally work, working life is shorter, be unfavorable for the operation of motor continuous and effective.

Model utility content

The technical problem that the utility model solves is, in prior art, because the compression temperature of piston is higher, cause the hardness of piston ring material in the process of work to decline, add piston ring moves up and down in overall piston movement process, more accelerate the impact wear between piston ring and compression, and the fit up gap of the piston ring causing and compression is because wearing and tearing slowly increase, seal reduces, and then the power of motor is also along with reduction slowly, in the time that compression and piston ring scuffing were lost efficacy to being assembled together completely, to there is difficulty in starting in motor, underpower, body case pressure raises, ventilation system is seriously smoldered, consumption of lubricating oil increases, blue smoke is emitted in exhaust, firing chamber, the various bad phenomenon such as the serious carbon deposit in the surface such as piston, need to change piston could normally work, working life is shorter, be unfavorable for the problem of the operation of motor continuous and effective, and then provide a kind of piston of optimizing structure.

The technological scheme that the utility model adopts is, a kind of piston, comprises piston only, and described piston only is provided with compression, and described compression is provided with back-up coat and wearing layer from the inside to the outside; A described wearing layer dorsad side of back-up coat is triangular groove, and described triangular groove is equipped with piston ring.

Preferably, the angle of the triangular groove of described wearing layer is 5～20 °.

Preferably, the angle of the triangular groove of described wearing layer is 15 °.

The utility model provides a kind of piston of optimizing structure, by back-up coat and wearing layer are set from the inside to the outside in the compression of piston only, wearing layer is combined as a whole by back-up coat and piston, more stable, wearing layer be arranged so that in the impact process between piston ring and compression that wearing and tearing are less, piston is longer working life, engine operation efficiency is high, performance is better, greatly reduces the generation of accidents such as collaborating; In the utility model, a wearing layer dorsad side of back-up coat is made as triangular groove and is equipped with piston ring, the gradient face of triangular groove has been eliminated the gap producing because of assembling, make piston ring and compression laminating more firm, while having avoided piston up-down, impact force concentrates on annular groove edges and corners simultaneously, further extend the working life of piston, improved the working efficiency of motor.

Accompanying drawing explanation

Fig. 1 is the plan view generalized section of omission piston ring of the present utility model;

Fig. 2 is the partial enlarged drawing of A in Fig. 1.

Embodiment

Below in conjunction with embodiment, the utility model is described in further detail, but protection domain of the present utility model is not limited to this.

As shown in the figure, the utility model relates to a kind of piston, comprises piston 1 body, and described piston 1 body is provided with compression 2, and described compression 2 is provided with back-up coat 3 and wearing layer 4 from the inside to the outside; A described wearing layer 4 dorsad side of back-up coat 3 is triangular groove, and described triangular groove is equipped with piston ring.

In the utility model, back-up coat 3 and wearing layer 4 are set from the inside to the outside in the compression 2 of piston 1, because wearing layer 4 is traditionally arranged to be antifriction metal (AFM), it is metal layer, it is to put in cast, in the time of cast, will form one deck alloy-layer with piston 1, forms back-up coat 3, the existence of back-up coat 3 has guaranteed that wearing layer 4 and piston 1 are combined as a whole completely, the situation of having avoided wearing layer 4 to come off; And the existence of wearing layer 4 has guaranteed in the operation of piston 1, when being assemblied in piston ring in compression 2 and compression 2 and colliding up and down, the piston that wearing layer 4 is not more installed in the wearing and tearing of compression 2 is much smaller, piston extends for 1 working life, and greatly reduce the generation of accidents such as collaborating, promote the working efficiency of motor.

In the utility model, a wearing layer 4 dorsad side of back-up coat 3 is set to the structure of triangular groove and is equipped with piston ring, the gap that the gradient face of triangular groove has produced while having eliminated assembling piston ring, what make that piston ring and compression 2 fit on the whole is more firm, also while having avoided piston 1 to move up and down, piston ring concentrates on the edges and corners of compression 2 for the impact force of compression 2 simultaneously, further extend the working life of piston 1, promoted the working efficiency of motor.

The angle of the triangular groove of described wearing layer 4 is 5～20 °.

The angle of the triangular groove of described wearing layer 4 is 15 °.

In the utility model, the angle of the triangular groove of wearing layer 4 is traditionally arranged to be the value in 5 °～20 °, angle value is now less, and can effectively avoid piston 1 to move up and down time, piston ring concentrates on the edges and corners of compression 2 for the impact force of compression 2, extends the working life of piston 1.

In actual operation, the angle of the triangular groove of wearing layer 4 is set to 15 °, disperses the effect of impact force best under this angle, and it is the most suitable to process, and the assembling laminating degree of piston ring and compression 2 is best.

The utility model has solved in prior art, because compression 2 temperature of piston 1 are higher, cause the hardness of piston ring material to decline, add piston ring moves up and down in overall piston 1 movement process, more accelerate the impact wear between piston ring and compression 2, and the fit up gap of the piston ring causing and compression 2 is because wearing and tearing slowly increase, seal reduces, and then the power of motor is also along with reduction slowly, in the time that compression 2 and piston ring scuffing were lost efficacy to being assembled together completely, to there is difficulty in starting in motor, underpower, body case pressure raises, ventilation system is seriously smoldered, consumption of lubricating oil increases, blue smoke is emitted in exhaust, firing chamber, the various bad phenomenon such as piston 1 serious carbon deposit such as surface such as grade, need to change piston 1 could normally work, working life is shorter, be unfavorable for the problem of the operation of motor continuous and effective, by back-up coat 3 and wearing layer 4 are set from the inside to the outside in the compression 2 of piston 1 body, wearing layer 4 is combined as a whole by back-up coat 3 and piston 1, more stable, wearing layer 4 be arranged so that in the impact process between piston ring and compression 2 that wearing and tearing are less, piston is longer 1 working life, engine operation efficiency is high, performance is better, greatly reduce the generation of accidents such as collaborating, in the utility model, a wearing layer 4 dorsad side of back-up coat 3 is made as triangular groove and is equipped with piston ring, the gradient face of triangular groove has been eliminated the gap producing because of assembling, make piston ring and compression 2 fit more firm, while having avoided piston 1 to move up and down, impact force concentrates on annular groove edges and corners simultaneously, further extend the working life of piston, improved the working efficiency of motor.

Claims

1. a piston, comprises piston only, and described piston only is provided with compression, it is characterized in that: described compression is provided with back-up coat and wearing layer from the inside to the outside; A described wearing layer dorsad side of back-up coat is triangular groove, and described triangular groove is equipped with piston ring.

2. a kind of piston according to claim 1, is characterized in that: the angle of the triangular groove of described wearing layer is 5～20 °.

3. a kind of piston according to claim 2, is characterized in that: the angle of the triangular groove of described wearing layer is 15 °.