Motor rotor counterbalance structure for compressor

Abstract

The invention discloses the electric machine rotor balance block frame of the compressor, the balance block is fixed on the above end of the electric machine rotor composed by the rotor iron core and the above and the bottom end casting aluminum in the cavity of the compressor, it can be used to balance the electric machine rotor, the frame of the balance block is showed below, the windward face of the side of the balance block and the other side of the balance block are arc streamline ladder frames. The invention processes the windward face of the balance block of the electric machine rotor to the streamline round angle, the friction between the balance block and the medium such as the cold intermediary when the electric machine rotating can be reduced to the least, the heat produced form the friction and the importing power can be reduces to advance the capability of compressor. The leeward face of the balance block can also be produced to the round arc streamline ladder frame to amend the complexion of producing the bow wave when cold intermediary flow passes.

Description

technical field [0001] The invention relates to a motor rotor. In particular, it relates to a motor rotor balance weight structure of a compressor which can reduce the friction between the balance weight and the refrigerant and prevent the refrigerant eddy current from being generated when the motor rotor rotates. Background technique [0002] Typically, compressors are used to compress fluids. This compressor is composed of a closed container with a certain inner space, a motor part installed in the closed container to generate a driving force, and a compression part that can compress fluid by using the driving force of the motor part. figure 1 It is a schematic diagram of the internal structure of a rotary compressor in the prior art. Such as figure 1 As shown, the airtight container of the prior art rotary compressor 10 is composed of a cylindrical shell 3, an upper cover 4 and a lower cover 5. A refrigerant inlet 1 is provided on one side of the casing 3 , and a refr...

AI Technical Summary

Problems solved by technology

But the shape of the balance weight 14 of prior art is, when the motor rotor 20 rotates, the windward surface 14a of the balance weight 14 side and the leeward surface 14b of the other side are all straight angles of 90 degrees, like this, in the motor When the rotor 20 rotates at high speed (3460 rpm / Min), the vertical windward surface 14a of the balance weight 14 will rub against the medium such as the refrigerant in the compressor cavity, which will not only generate excess heat, but more importantly, increase the input work and reduce the performance.

In addition, when the refrigerant flows (relative to) the leeward surface 14b, eddy currents will be generated, which will affect the flow of the refrigerant and reduce the efficiency.

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