CN203614355U

CN203614355U - Piston of oilless air compressor

Info

Publication number: CN203614355U
Application number: CN201320809163.5U
Authority: CN
Inventors: 罗领春
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2014-05-28
Anticipated expiration: 2023-12-10

Abstract

The utility model relates to the technical field of air compressor spare and accessory parts, in particular to a piston of an oilless air compressor. The piston comprises a piston connecting rod and a piston plate arranged on the upper portion of the piston connecting rod. A pressing plate which is fixedly connected with the piston connecting rod is arranged on the upper end face of the piston plate in a pressing mode, a gasket is arranged between the lower end face of the pressing plate and the upper end face of the piston plate in a backing mode, a circle of groove is formed in the edge portion of the pressing plate, a rubber seal ring is arranged in the groove, and the peripheral portion of the gasket turns upwards from inside to outside to partially wrap the rubber seal ring. The piston of the oilless air compressor has the advantages that the situation that a sealing piece of the piston is softened due to long-time quick friction between the piston and a cylinder is avoided, accordingly, the phenomena of damage, scuffing and sticking of the cylinder or the piston are avoided, the repair cost is lowered directly or indirectly, and the repair difficulty is also relatively lowered.

Description

The piston of oilless air compressor

Technical field

The utility model relates to the technical field of air compressor Component, especially relates to a kind of piston of oilless air compressor.

Background technique

Oil-free air compressor is the main body in compressed air source unit, and it is the device that the mechanical energy of motor is converted to gas pressure energy, is compressed-air actuated pressure generator.The piston of at present traditional oilless air compressor is in the engineering of air compressor work, in the process that the load of especially working increases, easily make the Sealing of the piston of oilless air compressor soften, to such an extent as to the metal part that causes piston is direct and cylinder body friction, cause the damage, scuffing of cylinder bore of cylinder body or piston, the phenomenon such as stuck, maintenance cost is high and difficulty is large in direct or indirect causing.

Summary of the invention

The deficiency existing for above-mentioned prior art, the purpose of this utility model be to provide a kind of Sealing that prevents piston because of piston and cylinder body for a long time fast friction soften, cause the damage, scuffing of cylinder bore of cylinder body or piston, stuck phenomenon, direct or indirect reduction maintenance cost, and the piston of oilless air compressor that also relatively reduces of the difficulty of maintenance.

For realizing above-mentioned object, the utility model provides following technological scheme:

A kind of piston of oilless air compressor, comprise piston rod and be located at the piston plate on the top of piston rod, on piston plate upper-end surface, be installed with the pressing plate being fixedly connected with piston rod, between the lower end surface of pressing plate and piston plate upper-end surface, pad is provided with pad, the limit portion of described pressing plate offers a circle groove, in groove, be provided with rubber seal, the edge part of pad is by being upturned outside interior and partly enveloping described rubber seal.

The utility model is further set to: the upper-end surface of described pressing plate is provided with a groove.

The utility model is further set to: the limit portion of the lower end surface of described piston plate is inclined upwardly from the inside to the outside and extends to the limit portion of upper-end surface.

In the utility model: described pad has annular body, the teflon that body is is 10%～35% with weight percentage and 65%～90% polyimide material are made.

The utility model is further set to: the internal diameter of described body is 10mm～300mm.

By adopting technique scheme, the technique effect that the utility model reaches is:

The edge part of pad is by being upturned outside interior and partly enveloping rubber seal, in making piston do piston movement in cylinder body, the part being coated by pad rubs fast with cylinder body, and add that rubber seal has certain spring function, can cushion the partial reaction power producing in the process of pad friction, the not only further wear-resistant effect of reinforced gasket, and can reduce the loss of pad and prevent cylinder body or the damage of piston, scuffing of cylinder bore, the phenomenon such as stuck, direct or indirect reduction maintenance cost, and the difficulty of maintenance also reduces relatively, and the teflon that pad employing weight percentage is 10%～35% and 65%～90% polyimide material are made, it effectively raises the quality of pad itself, the wear-resistant of itself and stretch-proof effect are strengthened, and the effect of high temperature resistance also strengthens accordingly, can resist the high temperature producing in piston and cylinder body friction process, prevent pad or rubber seal or piston Yin Gaowen and cause softening.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is one of perspective view of the present utility model.

Fig. 2 is two of perspective view of the present utility model.

Fig. 3 is the cross-sectional view of pad of the present utility model.

Fig. 4 is the cross-sectional view of pressing plate of the present utility model.

Specific embodiment

As shown in Figures 1 to 4, for the piston of the disclosed a kind of oilless air compressor of the utility model, comprise piston rod 10 and be located at the piston plate 20 on the top of piston rod 10, on piston plate 20 upper-end surfaces, be installed with the pressing plate 30 being fixedly connected with piston rod 10, between the lower end surface of pressing plate 30 and piston plate 20 upper-end surfaces, pad is provided with pad 40, the limit portion of described pressing plate 30 offers a circle groove 50, in groove 50, be provided with rubber seal 60, the edge part of pad 40 is by being upturned outside interior and partly enveloping described rubber seal 60.The upper-end surface of described pressing plate 30 is provided with a groove 70.The limit portion of the lower end surface of described piston plate 20 is inclined upwardly from the inside to the outside and extends to the limit portion of upper-end surface.

In the present embodiment, described pad 40 has annular body, and the teflon that body is is 10%～35% with weight percentage and 65%～90% polyimide material are made.The internal diameter of described body is 10mm～300mm.Certainly, the content of teflon is 10%, 15%, 20%, 25%, 30%, 35%, and the content of polyimide is 90%, 85%, 80%, 75%, 70%, 65% accordingly, by adding a certain amount of teflon, can be high temperature resistant 380 degrees Celsius, low temperature resistant subzero 200 degrees Celsius, thermosetting performance is stronger, can be without oily waterless operation, corrosion-resistant, anti-soda acid acetone, formaldehyde ethanol, can exceed 100 times of the materials such as rubber polyurethane working life, even 1000 times.Certainly the content of teflon is higher, and high temperature resistant and low temperature resistant degree also can be strengthened accordingly.

Above-described embodiment is only preferred embodiment of the present utility model, not limits according to this protection domain of the present utility model, therefore: all equivalences of doing according to structure of the present utility model, shape, principle change, within all should being covered by protection domain of the present utility model.

Claims

1. the piston of an oilless air compressor, comprise piston rod and be located at the piston plate on the top of piston rod, it is characterized in that: on piston plate upper-end surface, be installed with the pressing plate being fixedly connected with piston rod, between the lower end surface of pressing plate and piston plate upper-end surface, pad is provided with pad, the limit portion of described pressing plate offers a circle groove, in groove, be provided with rubber seal, the edge part of pad is by being upturned outside interior and partly enveloping described rubber seal.

2. the piston of oilless air compressor according to claim 1, is characterized in that: the upper-end surface of described pressing plate is provided with a groove.

3. the piston of oilless air compressor according to claim 1, is characterized in that: the limit portion of the lower end surface of described piston plate is inclined upwardly from the inside to the outside and extends to the limit portion of upper-end surface.