CN200971845Y - Piston of compressor of vehicle air conditioner - Google Patents

Abstract

The utility model discloses a piston of an automobile air condition compressor and is a working component that makes reciprocated movement within the air condition compressor. The surface of the utility model has an anodic coating and a solid lubricant permeates into a tiny hole of the anodic coating. Compared with the existent technology, the utility model has the advantages of that the hardness of the piston surface is greatly improved and has a certain dry rub resisting performance and due to the small friction between the piston and the cylinder, the piston ball socket and the hemispherical, the utility model greatly improves the cooling frequency and service time of the air condition compressor and efficiently slows down the increasing noise in the process of using the compressor, and the piston has a simple manufacturing technics, low manufacturing cost, no harmful gas to be discharged and avoids from environmental pollution.

Description

The automobile air conditioner compressor piston

The utility model relates to parts reciprocating in cylinder, the piston in particularly a kind of automobile air conditioner compressor.

Background technique

At present, the piston of piston-type automobile air-conditioning compressor has two classes.One class is traditional piston that is used with piston ring, and piston ring is fastened in the piston ring groove, and it tightly rises on cylinder wall during work, frictional force during reciprocating motion of the pistons is bigger, the energy consumption height, piston ring and cylinder wall are easy to wear, cause compressor in use refrigerating capacity descend fast; Another kind of is the piston that its rubbing surface applies one deck ptfe composite, and piston cooperates with the cylinder interporal lacuna, and reciprocating motion of the pistons is calmed the anger by oil film seal.China's model utility CN2633623 patent specification has been done detailed disclosure to this class piston.The piston of surface-coated one deck ptfe composite has: frictional force is little, coefficient of performance height; It is little to wear and tear, good endurance, reliable operation.Yet applying ptfe composite needs through surface coarsening---degrease---heating---the 1st spraying---drying---the 2nd spraying---oven dry---the 3rd spraying---oven dry---high temperature sintering---technologies such as grinding.In manufacture process, can produce a large amount of toxic gases, have a strong impact on health of operators; The while toxic gas is discharged into outdoor, the meeting atmosphere pollution; There is complex process in addition, problems such as manufacture cost height.

The model utility content

At the deficiency that above-mentioned prior art exists, the automobile air conditioner compressor piston that the purpose of this utility model provides a kind of surface hardness height, has certain anti-dry friction ability, production process can be avoided environmental pollution.

Technical solution of the present utility model is: a kind of piston of automobile air conditioner compressor, has columned piston body, the waist of piston body has an opening, a ball-and-socket is respectively arranged on the bi-side of opening, one deck anodic oxide coating is arranged on the cylndrical surface of described piston body, the solid lubricant of sealing of hole is arranged in the micropore of described anodic oxide coating.

There is anodic oxide coating on the ball-and-socket surface of described piston body, and the solid lubricant of sealing of hole is arranged in the micropore of described anodic oxide coating.

The thickness of described anodic oxide coating is 0.008～0.010mm.

The utility model compared with prior art has the following advantages and technique effect

1, the anodic oxide coating of piston face has improved piston face hardness, the solid lubricant of sealing of hole has improved anti-dry friction ability again, thereby the piston friction face of making not only has good sealing effect, and its wear resistance is better, improve the coefficient of performance of compressor, prolonged the working life of compressor.

2, anodic oxidation and the solid lubricant sealing of hole because of piston carries out after piston is finished whole gold machinings, and this processing is to piston integral body, so also improved the abrasion-resistance and the selflubricating ability of piston ball-and-socket, the gap of having slowed down ball-and-socket and hemisphere effectively increases, slow down compressor noise in use and increased, prolonged the working life of compressor equally.

3, the piston processing technology is simple, and manufacture cost reduces by 2.5 yuan/than the piston of spraying teflon.

4, piston does not have the harmful gas generation in process of production, has avoided environmental pollution.

Description of drawings

Fig. 1 is the structure diagram that adopts the automobile air conditioner compressor of the utility model piston.

Fig. 2 is that structure of piston is partly cutd open enlarged view among Fig. 1.

Fig. 3 is the partial enlarged drawing at Fig. 2 J place.

Embodiment

Fig. 1 shows one of them structure diagram of the automobile air conditioner compressor that adopts the utility model piston.This air condition compressor is a bi-directional swash plate type compressor, mainly is made up of front-bank rotor housing 5, rear-bank rotor housing 9, front end housing 1 back cylinder cover 10, piston 7, hemisphere 8, swash plate 6, live axle 2, valve plate 12, suction valve chip 4 exhaust valve plates 3.Swash plate flexibly connects by hemisphere and piston, and when live axle 2 drove swash plate 6 rotations, piston 7 was reciprocating in two cylinders 11 of front and back cylinder body 5,9.Its working principle is: live axle 2 rotations make piston 7 be moved to the lower dead center direction by top dead center by swash plate 6, suction and discharge this moment valve block 4,3 close, at first cylinder 11 inside clearance portion gas expand, when gas pressure in the cylinder drops to pressure of inspiration(Pi) when following, suction valve chip 4 is opened, air-breathing beginning, until the piston arrives lower dead center, suction valve chip is closed; To the motion of top dead center direction, pressurized gas to cylinder pressure reaches more than the exhaust pressure piston 7 by lower dead center, and exhaust valve plate 3 is opened, and high temperature and high pressure gas is discharged, and until the piston arrives top dead center, exhaust valve plate is closed, and piston is finished a work cycle.Refrigerant gas becomes high temperature and high pressure gas by the low-temp low-pressure gas compression.

As Fig. 2, shown in Figure 3, above-mentioned piston 7 has the piston body 701 of a cylindrical shape, it is made by the silumin material of light weight usually, the waist of piston body 7 has an opening 704, a ball-and-socket 703 that can match with hemisphere 8 spheres that is positioned on piston body 7 axis is respectively arranged on the bi-side of opening, one deck anodic oxide coating 705 that forms after anodizing is arranged on the cylndrical surface 702 of described piston body 7 and the ball-and-socket face 703, the solid lubricant 706 of sealing of hole is arranged in the micropore of anodic oxide coating.The thickness of anodic oxide coating is 0.008～0.010mm, and solid lubricant is a molybdenum disulfide, can certainly be polytetrafluoroethylmaterial material, makes mixed solution or ultrafine dust, adopts dipping or smearing method that it is oozed in the micropore that is attached to oxide layer.Because anodic oxide coating 705 has higher surface hardness (more than the HV400), and be filled with solid lubricant in the micropore of oxide layer, thereby wear-resisting property improves, and has certain anti-dry grinding ability, thereby can improve the refrigerating efficiency of air condition compressor, prolonged working life, the noise that has slowed down compressor operation increases.The oxidation technology of piston is simple, compares with former spraying teflon piston, and manufacture cost can reduce by 2.5 yuan/, and does not have noxious gas emission in process of production, helps environmental protection.

Claims (5)

1, a kind of piston of automobile air conditioner compressor, has a cylindric piston body (701), the waist of piston body has an opening (704), a ball-and-socket (703) is respectively arranged on the bi-side of opening, it is characterized in that: one deck anodic oxide coating (705) is arranged on described piston body (701) cylndrical surface (702), the solid lubricant (706) of sealing of hole is arranged in the micropore of this anodic oxide coating.

2, the piston of automobile air conditioner compressor according to claim 1 is characterized in that: there is anodic oxide coating on described ball-and-socket (703) surface, and the solid lubricant of sealing of hole is arranged in the micropore of this anodic oxide coating.

3, the piston of automobile air conditioner compressor according to claim 1 and 2 is characterized in that: the thickness of described anodic oxide coating is 0.008～0.010mm.

4, the piston of automobile air conditioner compressor according to claim 3 is characterized in that: described solid lubricant is a molybdenum disulfide, perhaps is teflon.

5, the piston of automobile air conditioner compressor according to claim 1 and 2 is characterized in that: described solid lubricant is a molybdenum disulfide, perhaps is teflon.

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