Lg Electronics Inc.

Yoo-Chol Ji

Young-Kwan Kim

Moon-Chang Choi

Kwang-Ha Suh

Dae-Sung Wang

Sang-Wook Lee

Hoi-Sun Kim

Kwang-ha Suh

A system for cooling a turbo compressor includes two compressing parts on opposite ends of a rotational shaft driven by a motor. Fluid from a fluid chamber within the casing of the device is supplied to a bearing chamber when the temperature of the bearing chamber increases. A supply passage is formed in a first support where the radial bearing for supporting a load in the axial direction is formed. The open-and-shut valve supplies fluid when the temperature of the bearing chamber increases.

Thrust bearing cooling unit for a turbo compressor

A cooling system, which includes a compressor for compressing the refrigerant by operation of a motor, a condenser, an expansion means, and an evaporator, comprises a motor cooling device for cooling down the motor by making some of the refrigerant passed the condenser flow to the compressor according to temperature of the motor, and therefore the heat of high temperature generated from the motor in the compressor during the operation of the compressor which is used in the cooling system can be cooled down efficiently.

Cooling system and cooling method

A centrifugal compressor includes first and second impellers coupled to opposite ends of a drive shaft. Each impeller includes a hub with a plurality of blades on a front face. The blades compress a fluid, while forcing the fluid off an outer periphery of the hub. At least one of the impellers includes a plurality of uniformly shaped pressure attenuating grooves provided around its outer periphery. The pressure attenuating grooves reduce an axial load applied to the impeller, and act to balance the overall resultant axial load applied to the drive shaft by the two impellers, thereby reducing wear on thrust bearings engaging the rotating drive shaft.

Centrifugal compressor structure with impellers

Growing community of inventors

Incheon, South Korea

Yoo-Chol Ji