A multistage compression system uses refrigerant and oil. The multistage compression system includes a low-stage compressor that compresses the refrigerant, a high-stage compressor that further compresses the refrigerant compressed by the low-stage compressor, refrigerant pipes that introduce the refrigerant compressed and discharged by the low-stage compressor into a suction part of the high-stage compressor, an intercooler, and an oil discharge pipe. The intercooler cools the refrigerant discharged by the low-stage compressor before the refrigerant is sucked into the high-stage compressor. The intercooler is disposed between the refrigerant pipes. The oil discharge pipe discharges the oil in the low-stage compressor. The oil discharge pipe connects the low-stage compressor and a portion of the refrigerant pipes. The portion of the refrigerant pipes is on an upstream side of the intercooler.

A geared compressor includes a plurality of compression units and a compression-unit-driving mechanism which drives the plurality of compression units. The compression-unit-driving mechanism includes a plurality of driven gears which are provided in respective rotation shafts of the plurality of compression units and a plurality of large-diameter gears which are directly or indirectly driven by a drive source and have outer diameters larger than those of the plurality of driven gears. The plurality of large-diameter gears is arranged side by side in a horizontal direction and each of the plurality of large-diameter gears meshes with two or more of the plurality of driven gears.

A waste heat recovery system including a drive unit, the drive unit having a drive shaft, a compressor, the compressor operably coupled to the drive shaft, wherein operation of the drive unit drives the compressor, and a waste heat recovery cycle, the waste heat recovery cycle coupled to the drive unit and the compressor, wherein a waste heat of the drive unit powers the waste heat recovery cycle, such that the waste heat recovery cycle transmits a mechanical power to the compressor, is provided. Furthermore, an associated method is also provided.

A gas turbine engine has a compressor section with a low pressure compressor and a high pressure compressor having a downstream end. A cooling air system includes a tap from a location upstream of the downstream most location. The tap passes air to a boost compressor, and the boost compressor passes the air back to a location to be cooled. The boost compressor is driven by a shaft in the engine through an epicyclic gear system. A speed control changes the relative speed between an input and an output to the epicyclic gear system.

A rotary machine includes: a pair of radial bearings for rotatably supporting a rotating shaft around a center axis; impellers fixed to the rotating shaft at positions separated from the radial bearings in a center axis direction; and additional masses fixed to the rotating shaft at positions separated from both the radial bearings and the impellers in the center axis direction, and applying a load to an entire circumference of the rotating shaft so as to move positions of amplitude increase regions where an amplitude in a radial direction of the rotating shaft starts to increase.

A multistage compression system uses refrigerant and oil. The multistage compression system includes a low-stage compressor that compresses the refrigerant, a high-stage compressor that further compresses the refrigerant compressed by the low-stage compressor, refrigerant pipes that introduce the refrigerant compressed and discharged by the low-stage compressor into a suction part of the high-stage compressor, an intercooler, and an oil discharge pipe. The intercooler cools the refrigerant discharged by the low-stage compressor before the refrigerant is sucked into the high-stage compressor. The intercooler is disposed between the refrigerant pipes. The oil discharge pipe discharges the oil in the low-stage compressor. The oil discharge pipe connects the low-stage compressor and a portion of the refrigerant pipes. The portion of the refrigerant pipes is on an upstream side of the intercooler.

An inlet guide vane includes: a movable vane that has a vane main body and a shaft portion disposed in an end portion of the vane main body; a frame that has an insertion hole into which the shaft portion is to be inserted; a plurality of bearing portions that are arranged inside the insertion hole at an interval in a direction of a central axis of the shaft portion and that support the shaft portion to be rotatable around the central axis with respect to the frame; and a seal portion that is located inside the insertion hole between the plurality of bearing portions in the direction of the central axis and that seals an area between the insertion hole and the shaft portion.

A fan includes a support, a motor mounted at the support and including a first rotation shaft, a first blade mounted at one end of the first rotation shaft, a transmission mechanism mounted at the support and connected to another end of the first rotation shaft, and a second blade. The transmission mechanism includes a second rotation shaft. A rotation direction of the second rotation shaft is opposite to a rotation direction of the first rotation shaft. The second blade is mounted at the second rotation shaft. A tilt direction of the first blade is opposite to a tilt direction of the second blade.

An assembly having a first compressor train and a second compressor train for compressing a process fluid, wherein the first compressor train has a first drive and a first compressor, wherein the second compressor train has a second drive and a second compressor, wherein the first compressor train is not mechanically coupled to rotating parts of the second compressor train for transmission of torque, wherein the two compressors of the different compressor trains are directly connected to each other fluidically by a connecting fluid line such that the first compressor is arranged upstream of the second compressor. The first compressor compresses at a pressure ratio between 1.1 and 1.6 before the process fluid is fed to the second compressor.

Disclosed is a high-speed dual turbo machine enabling cooling thermal equilibrium and, more particularly, to a high-speed dual turbo machine enabling cooling thermal equilibrium, the high-speed dual turbo machine maximizing the cooling efficiency thereof by compressing and discharging external air suctioned therein at both ends, cooling an air compressor in a suction air-cooling method, decreasing a flow path of air for cooling the inside of the dual turbo machine and the air compressor, and optimizing the flow path.

Accordingly, the present invention uses the suction air-cooling method and guides the flow of air for cooling the turbo machine through a specific path, so that it maximizes the efficiency and durability of the turbo machine, the cost reduction owing to the structural simplification of the turbo machine, and the easiness of maintenance by preventing an increase in temperature of the inside of the turbomachine casing (100) and the air compressor (200).