Compressor motors for turbo refrigerators

Abstract

The invention provides a motor used for a compressor of a turbo-refrigerator. The labyrinth sealing member is arranged or detached with respect to a rotary shaft of a motor of a turbo compressor, and the broken or damaged labyrinth sealing member can be prevented, and the integrity of the sealing mechanism can be guaranteed, and therefore the simplification of the assembly operation of the labyrinth sealing member can be prevented, and the assembly time can be reduced. The labyrinth sealing member is disposed in the motor of the compressor, and the labyrinth sealing member is provided with a labyrinth sealing body, which is opposite to the outer periphery of the rotary shaft of the motor for the shaft sealing, and is formed by the gear rows. The labyrinth sealing part is provided with a plurality of guiding parts in a separated manner,and the guiding parts are provided with the same internal diameter as the labyrinth sealing body, and a plurality of circular grooves are formed in the rotary shaft corresponding to the guiding parts.

Description

technical field [0001] The present invention relates to a motor for a compressor of a turbo refrigerator, and more particularly, to a motor for a compressor in which a part of refrigerant is guided from a refrigeration cycle to an electric motor driving a turbo compressor in a turbo refrigerator to cool the motor. Background technique [0002] Conventionally, turbo refrigerators used in refrigerating and air-conditioning equipment and the like are constituted by a closed system in which a refrigerant is sealed, and are configured as an evaporator that absorbs heat from cold water (fluid to be cooled) to evaporate the refrigerant to exert a cooling effect, A compressor that compresses the refrigerant gas evaporated by the evaporator to become a high-pressure refrigerant gas, a condenser that cools the high-pressure refrigerant gas with cooling water (cooling fluid) to condense it, and The expansion valve (expansion mechanism) that depressurizes the refrigerant and expands it ...

AI Technical Summary

Problems solved by technology

The gear box 18 having the oil cylinder 19 communicates with the motor box 17 through the through hole through which the rotating shaft 12 passes, so there is a problem that the oil leaks into the refrigerant system to lower the oil level of the oil cylinder 19 and impair the oil supply function, or Refrigerant leakage into the oil system lowers the temperature of the oil, making it impossible to ensure the specified oil viscosity, and refrigerant gas that does not contribute to the refrigeration capacity flows from the high-pressure part of the refrigeration cycle to the low-pressure part, causing the efficiency of the refrigerator to drop

Therefore, the damage or breakage of a part of the tooth row not only reduces the sealing function, but also causes device failure due to the damaged fragments being involved in the rotating body.

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