Compressor and refrigeration device

Abstract

The invention provides a compressor and a refrigeration device. The compressor comprises a housing, a stator, a rotor, a first air cylinder, a first piston, a second air cylinder, a second piston, a crankshaft, a bearing system, a balance system and an insulation hood, wherein the first piston is arranged in the first air cylinder; the second piston is arranged in the second air cylinder; the crankshaft is provided with a first eccentric part and a second eccentric part; the first piston is arranged on the first eccentric part in a sleeving manner; the second piston is arranged on the second eccentric part in a sleeving manner; the crankshaft penetrates through the rotor and a compression component; the bearing system comprises a first bearing, a second bearing and an auxiliary bearing; the first bearing is arranged on one side, close to a driving motor, of the first air cylinder; the second bearing is arranged on one side, far from the driving motor, of the second bearing; the auxiliary bearing is arranged on the crankshaft and positioned on one side, far from the compression component, of the driving motor; the balance system comprises a rotor balance block and a crankshaft balance block; the rotor balance block is arranged on the rotor; the crankshaft balance block is arranged on the crankshaft and positioned on one side, far from the first bearing, of the second bearing; and a part of the isolation hood surrounds the crankshaft balance block. The high-speed operation reliability of the compressor is improved.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to a compressor and a refrigeration device. Background technique [0002] In the rolling rotor compressor, in the axial direction of the crankshaft, there are rotor, upper bearing, cylinder and lower bearing in sequence. The crankshaft with eccentric part rotates under the drive of the rotor, and the piston sleeved on the eccentric part performs eccentric motion compression in the cylinder. The gas does work. Due to the existence of the eccentric part and the eccentric movement of the piston, it is necessary to set up balance weights on the upper and lower sides of the rotor to offset the unbalanced force and moment. The centrifugal force and bending moment generated by the balance weight on the upper side of the rotor and the balance weight on the lower side of the rotor will act on the crankshaft, and the resulting bending deformation of the crankshaft is mainly s...

AI Technical Summary

Problems solved by technology

[0003] With the development trend of high efficiency, miniaturization and high speed of compressors, and in order to improve mechanical efficiency, the crankshaft shaft diameter is often designed to be smaller, and the crankshaft stiffness is poorer.

Since the centrifugal force is directly proportional to the quadratic of the rotational speed, for high rotational speed compressors, the crankshaft will be seriously deformed under the action of the centrifugal force and bending moment generated by the balance weight on the rotor, and wear with the upper bearing, making the upper bearing Poor reliability, which in turn makes the reliability of the compressor worse

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