Double-cylinder rotating compressor and eccentric assembling method thereof

Abstract

The invention discloses a double-cylinder rotating compressor which comprises a shell body, a motor, an upper flange, an upper air cylinder, a crank shaft, an upper running pulley, a partition plate, a lower running pulley, a lower air cylinder and a lower flange. The radius of a cylinder matched segment of the portion in which the crank shaft is matched with an inner hole of the partition plate is larger than biggest eccentric radiuses of an upper eccentric portion and a lower eccentric portion of the crank shaft, the cylinder matched segment of the crank shaft is matched with the inner hole of the partition plate in a sliding mode to form an auxiliary bearing of the compressor, the bottom end face of the lower eccentric portion of the crank shaft is arranged in an alignment mode corresponding to the bottom end face of the lower air cylinder, and the corresponding lower flange is a plane plate. The lower flange enables the lower running pulley and the lower eccentric portion of the crank shaft to be blocked in the lower air cylinder in an alignment mode, an original short shaft of the crank shaft is removed, the height of the shell body is reduced, frozen oil filling injection amount is reduced, and power consumption of the compressor is reduced. The invention further discloses an eccentric assembling method of the double-cylinder rotating compressor, a combined centering assembling mode from top to bottom is adopted by the method, and the problem that coaxiality difference of the long shaft and the short shaft of the existing crank brings problem for a gap of the lower cylinder is solved.

Description

【Technical field】 [0001] The invention relates to compressor equipment, in particular to a double-cylinder rotary compressor and an eccentric assembly method thereof. 【Background technique】 [0002] Existing twin-cylinder compressors, such as Figure 1 to Figure 4 As shown, the major axis b of crankshaft a and the matching flange of upper flange c are used as the main bearing, and the minor axis d of crankshaft a and the lower flange e are matched as auxiliary bearings. The part that fits with the short axis d of the crankshaft a causes the lower flange e to have a boss e1, resulting in higher processing and manufacturing costs for the lower flange e. [0003] At the same time, the short shaft of the crankshaft of the existing two-cylinder compressor also serves as the role of absorbing oil from the bottom of the compressor. The characteristics of this structure make it necessary to have a gap between the lower end of the short shaft d of the crankshaft a and the lower cover...

AI Technical Summary

Problems solved by technology

[0012] The second object of the present invention is to provide a combined centering assembly method from top to bottom, which solves the bad problem caused by the difference in the coaxiality of the long and short crankshafts in the past to the clearance of the lower cylinder, and reduces the power consumption of the compressor. , the eccentric assembly method of the twin-cylinder rotary compressor to improve the service life and quality of the compressor

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