Power generating device

Abstract

In a scroll compressor, a revolution scroll lap 1a stands on one of surfaces of a revolution lap support disk 1b of a revolution scroll member 1, and a revolution disk 2 is connected to the other surface. The revolution disk 2 is formed at its center with a revolution shaft support hole 2b into which an eccentric shaft 4a is to be inserted. An outer periphery of the revolution shaft support hole 2b is formed with a crankshaft support hole 2a into which an eccentric shaft 5e is to be inserted. The eccentric shaft 5e restrains the rotation of the revolution scroll member 1. The revolution scroll lap 1a and the revolution lap support disk 1b are integrally formed of synthetic resin. The revolution disk 2 is made of metal. The revolution shaft support hole 2b and the crankshaft support hole 2a are integrally formed together. With this configuration, the thermal deformation of revolution scroll member 1 is suppressed, and wear and mechanical loss caused by contact between laps are prevented.

Description

TECHNICAL FIELD [0001] The present invention relates to an electric power generator utilizing a scroll compressor as an air compressor. BACKGROUND TECHNIQUE [0002] A turbo-air compressor and a swirl air compressor are used as air compressors which supply air and which are utilized in polyelectrolyte fuel cells which are electric power generators. A turbo-air compressor is an air compressor in which a turbofan is rotated at high speed to increase the pressure by a centrifugal force. The turbo-air compressor is incorporated in a home vacuum cleaner, and the turbo-air compressor is normally rotated at high speed of 15,000 to 25,000 rpm. Thus, there is a problem that lifetime of the turbo-air compressor is as short as 5,000 hours, and its noise is also high. A swirl air compressor is an air compressor in which a rotation disk having a large number of radial grooves along its outer periphery causes turbulent flow and shearing effect to increase the pressure. Although high pressure can be...

AI Technical Summary

Benefits of technology

[0024] According to this aspect, it is possible to provide a payable electric power generator in which thermal deformation of the revolution scroll member is suppressed, wear and mechanical loss caused by contact between laps are prevented, power consumption of the air compressor is reduced, its lifetime is increased, and electricity loss is small.

[0044] According to this aspect, deformation is prevented by the synthetic resin embedded in the hole and by the dispersion of the driving force, and the compression efficiency is prevented from being deteriorated because the dead volume is eliminated.

Problems solved by technology

Thus, there is a problem that lifetime of the turbo-air compressor is as short as 5,000 hours, and its noise is also high.

Although high pressure can be generated as compared with circumferential speed, there is a problem that power consumption is high, operation efficiency is low and noise is high.

Further, since the thickness of the eccentric shaft 103a can not be increased, the revolution scroll member 101 is bent by the bending moment M, the drive shaft 103 and the eccentric shaft 103a can not be kept in parallel to each other, and this may cause a noise.

However, the electric power generator in which the above-described conventional scroll compressor is utilized as the air compressor has the following problems.

First, since synthetic resin is used for the revolution scroll member of the scroll compressor, if a metal part is inserted into the synthetic resin turning scroll to reinforce the receiving portion which receives the eccentric rotation, coefficients of linear expansion of the synthetic resin and the metal part are different from each other, the turning scroll is deformed by heat generated at the time of insert injection molding or change in time during use.

If such a deformation is generated, the gap between the turning scroll lap and the fixed scroll lap can not be maintained at constant, lap contact is generated, and this causes nose as mechanical loss.

That is, the deformation causes wear or mechanical loss due to the lap contact, and the lifetime and consumed power are adversely affected.

Further, the bearing boss is made of synthetic resin, a sink is generated in the resin due to the bearing boss at the time of insert injection molding, this sink causes a recess in the inner bottom surface of the turning scroll, and there is an adverse possibility that the compressing efficiency is lowered due to the dead volume.

Tip end gaps are provided between a lap tip end of the revolution scroll lap 101a and the fixed lap support disk 102b, and between a lap tip end of the fixed scroll lap 102a and the revolution lap support disk 101b. However, if the revolution scroll member made of synthetic resin is deformed, the predetermined gap can not be maintained, and the lifetime and consumed power are adversely affected.

When a discharging pressure of 10 Kpa or greater is required, there is a problem that gas leaks from a gap in the direction of the normal and the gap of the tip end.

If the synthetic resin is used for the revolution scroll member, there is a problem that it is deformed by drive force applied to the revolution scroll member.

Further, there is a problem that the scroll member, the casing and the like must further be reduced in weight to reduce the entire air compressor in weight.

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