Rotary expansible chamber devices – Working member has planetary or planetating movement – With relatively movable partition member
Patent
1995-02-17
1996-02-27
Freay, Charles
Rotary expansible chamber devices
Working member has planetary or planetating movement
With relatively movable partition member
418179, 418243, F01C 102
Patent
active
054944236
ABSTRACT:
A rotary compressor has a compression chamber defined by a rolling piston which is eccentrically rotated in a cylinder by a rotary shaft including an eccentric crank portion, and by a blade which slides in a groove formed in the cylinder and of which the tip contacts an outer-peripheral surface of the rolling piston. In such a rotary compressor, abnormal wear in the contact portion between the rolling piston and the blade can be prevented as follows: Assuming that the rotation angle of the rolling piston when the blade is located at a start position of reciprocating motion is zero degrees, the contact surface of the blade which is in contact with the rolling piston is formed to have a curvature of substantially zero and as a flat surface when the rotation angle of the rolling piston is about 90 degrees and about 270 degrees and the pressing force of the blade with respect to the rolling piston reaches the maximum value; and also, a material which has an elastic modulus lower than that of the material of the rolling piston which is highly self-lubricative is used for the blade.
REFERENCES:
patent: 1692639 (1928-01-01), Elsner
patent: 4615663 (1986-10-01), Iio et al.
Hata Hiroaki
Iizuka Tadashi
Ishiyama Akihiko
Kawashima Ken'ichi
Kohsokabe Hirokatsu
Freay Charles
Hitachi , Ltd.
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