SCROLL TYPE FLUID MACHINE

摘要

PURPOSE:To prevent a crank type anti-rotation mechanism from being damaged due to thermal expansion of a rotary scroll by attaching a bearing supporting block of the crank type anti-rotation mechanism on a frame of a scroll type compressor in such a manner that the bearing supporting block can move only in the radial direction of a shaft. CONSTITUTION:When a rotary scroll 22 expands due to heat of gas compression and friction of a rotary shaft bearing 10, excessively great shearing stresses are exerted in the radial direction on pin cranks 18 and 18' of a crank type anti-rotation mechanism. However, since bearing supporting blocks 20 and 20' supporting shafts 18a and 18b of the pin cranks 18 and 18' are attached to a frame 5a so that the blocks can move in the radial direction of the shaft, excessively great shearing stresses are prevented from being exerted on the pin cranks 18 and 18'.