CN103711675A

CN103711675A - Piston of oilless air compressor

Info

Publication number: CN103711675A
Application number: CN201310670289.3A
Authority: CN
Inventors: 罗领春
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2014-04-09

Abstract

The invention relates to the technical field of air compressor parts, in particular to a piston of oilless air compressors. The piston for oilless air compressors comprises a piston rod and a piston plate which is disposed on upper part of the piston rod. A press plate fixed with the piston rod is provided at upper end surface of the piston plate in a press fit, a gasket is disposed between lower end surface of the press plate and upper end surface of the piston plate, and a circle of grooves are formed in the edge of the press plate. A rubber seal ring is installed inside the groove, the edge of the gasket tilts upward from inside to outside, and the rubber seal ring is partly covered by edge of the gasket. The piston of oilless air compressors has the advantages that seal pieces can be prevented from softening out of friction between the piston and a cylinder, damage, scoring and blinding of the piston and the cylinder can be avoided, reparation cost can be reduced directly or indirectly, and difficulty to repair can be relatively decreased.

Description

The piston of oilless air compressor

Technical field

The present invention relates to the technical field of air compressor Component, especially relate 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 mechanical energy of motor to be converted to the device of 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 object of the invention is to 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 the oilless air compressor that also relatively reduces of the difficulty of maintenance.

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

A kind of piston of oilless air compressor, the piston plate that comprises piston rod and be located at 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 present invention is further set to: the upper-end surface of described pressing plate is provided with a groove.

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

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

By adopting technique scheme, the technique effect that the present invention reaches is:

The edge part of pad is by being upturned outside interior and partly enveloping rubber seal, when 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 further wear-resistant effect of reinforced gasket not only, 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 present invention is further detailed explanation.

Fig. 1 is one of perspective view of the present invention.

Fig. 2 is two of perspective view of the present invention.

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

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

Specific embodiment

As shown in Figures 1 to 4, piston for a kind of oilless air compressor disclosed by the invention, the piston plate 20 that comprises piston rod 10 and be located at 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 surpass 100 times of the materials such as rubber polyurethane, even 1000 times working life.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 invention, not limits the scope of the invention according to this, therefore: all equivalences of doing according to structure of the present invention, shape, principle change, within all should being covered by protection scope of the present invention.

Claims

1. the piston of an oilless air compressor, the piston plate that comprises piston rod and be located at 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.

4. the piston of oilless air compressor according to claim 1, is characterized in that: described pad has annular body, and the teflon that body is is 10%～35% with weight percentage and 65%～90% polyimide material are made.

5. the piston of oilless air compressor according to claim 4, is characterized in that: the internal diameter of described body is 10mm～300mm.