JP2017106330A5 - Turbomachine and turbomachine refrigerant compression method - Google Patents

Claims (5)

A rotation axis;
A bearing that supports the rotating shaft, and has a bearing surface facing the outer peripheral surface of the rotating shaft in a state where a liquid refrigerant is interposed;
The liquid refrigerant discharged from the bearing faces the end surface of the bearing in the axial direction of the bearing with a discharge space in which the liquid refrigerant is stored together with the gas-phase refrigerant, and has a through hole into which the rotating shaft is inserted. A partition,
An impeller fixed to the rotating shaft, having a front surface facing the partition wall in a state where a suction space for sucking a gas-phase refrigerant is interposed on the opposite side of the bearing as viewed from the partition wall in the axial direction of the rotating shaft. An impeller for sucking the gas-phase refrigerant from the suction space by rotating together with the rotating shaft,
The partition and the rotary shaft form a throttle filled with the gas-phase refrigerant supplied from the discharge space between a surface forming the through hole and an outer peripheral surface of the rotary shaft.
Turbo machine.   2. The motor according to claim 1, further comprising a motor that is attached to the rotating shaft adjacent to the impeller on the side opposite to the partition wall when viewed from the impeller in the axial direction of the rotating shaft and rotates the rotating shaft. Turbomachine.   3. The apparatus according to claim 1, further comprising an annular body that is formed in an annular shape while extending radially outward of the rotating shaft from an outer peripheral surface of the rotating shaft, and is disposed adjacent to the partition wall in the discharge space. The listed turbomachine.   The turbomachine according to claim 1, wherein the partition wall has a heat insulating structure inside the partition wall. Rotate the impeller fixed to the rotating shaft,
Supplying a liquid refrigerant between the rotating shaft and the bearing to lubricate the bearing and the rotating shaft;
Discharging at least a portion of the liquid refrigerant used for lubrication into a discharge space;
Storing at least a part of the liquid refrigerant in the discharge space together with a gas phase refrigerant in which a part of the at least part of the liquid refrigerant is evaporated;
Of the at least part of the liquid refrigerant and the gas phase refrigerant stored in the discharge space, the gas phase refrigerant is formed in a partition wall disposed between the discharge space and the suction space, and the rotating shaft is inserted. Through the throttling formed between the rotating shaft and the partition wall in the through hole is supplied from the discharge space to the suction space,
The suction space is filled with the gas phase refrigerant to be compressed and the gas phase refrigerant supplied from the exhaust space,
Compressing the gas-phase refrigerant filling the suction space by rotation of the impeller;
Refrigerant compression method for turbomachine.