Air suspension bearing air supply system, air supply method and centrifugal water chilling unit

Abstract

The invention provides an air suspension bearing air supply system, an air supply method and a centrifugal water chilling unit. The air suspension bearing air supply system comprises an air suspensioncompressor, a refrigerant circulation loop where the air suspension compressor is located and a first air supply loop, wherein a liquid inlet of the first air supply loop is connected to a liquid taking opening of the refrigerant circulation loop, liquid is taken from the liquid taking opening, an air outlet of the first air supply loop is connected to the air suspension compressor, the first airsupply loop comprises a liquid supplementing tank and an air supply tank, the installation height of the liquid supplementing tank and air supply tank is lower than that of the liquid taking opening,and a refrigerant in the refrigerant circulation loop can flow into the first air supply loop from the liquid taking opening under the action of gravity. The air suspension bearing air supply systemis suitable for the centrifugal water chilling unit adopting the air suspension bearing, continuous and stable air supply to the air suspension bearing is achieved through different installation heights of the liquid taking opening, the liquid supplementing tank and the air supply tank by means of gravity and the communicating vessel principle, and reliable and stable operation of the unit is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of centrifugal chillers, and in particular relates to an air suspension bearing air supply system, an air supply method and a centrifugal chiller. Background technique [0002] Centrifugal water chillers are usually used in various building air conditioners. The compressor bearings of centrifugal units mainly use oil-lubricated bearings, electromagnetic bearings, and air suspension bearings. Oil-lubricated bearings need to increase the oil supply system, and the lubricating oil will also Leakage into the refrigerant will cause refrigerant pollution. In addition, friction between the lubricating oil and the rotor will cause energy loss; for centrifugal compressors using electromagnetic bearings, the complete set of control systems for the bearings is more complicated, and the impact resistance of the system is relatively high. In addition, it is necessary to add additional power-off protection measures such a...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is that the design of the air supply system of the air suspension bearing is unreasonable, the refrigerant pump starts and stops frequently, and the reliability is low, thereby providing an air suspension bearing air supply system, an air supply method and a centrifugal chiller

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