Abstract: A seal structure includes a rotary shaft that is provided inside a housing, a metal-made surrounding portion of the housing that surrounds the rotary shaft in a radial direction of the rotary shaft, and a resin-made seal member that faces an inner circumferential surface of the surrounding portion and rotates together with the rotary shaft.

Abstract: An electric device includes a partition wall configured to partition between a motor chamber having a relatively high pressure and an inverter chamber having a relatively low pressure; an inverter, which is provided in the inverter chamber, and is configured to supply power; a motor, which is provided in the motor chamber, and is configured to operate with supply of power from the inverter; and a bus-bar device, which is mounted to the partition wall by being inserted into a partition wall through hole formed in the partition wall, and is configured to connect the inverter and the motor to each other. The bus-bar device includes a bus bar configured to connect the inverter and the motor to each other; a plate portion into which the bus bar is inserted; and a resin portion.

Abstract: A bearing structure of the present disclosure includes a rotation shaft, a bearing that is attached in a housing to support the rotation shaft with respect to the housing and includes an inner race through which the rotation shaft is inserted and an outer race which includes an annular groove portion formed on an outer peripheral surface facing an inner wall surface of the housing, and an O-ring which is disposed on the groove portion of the outer race of the bearing, protrudes outward in a radial direction in relation to the outer peripheral surface, and comes into contact with the inner wall surface of the housing. A clearance is formed between the inner wall surface of the housing and the outer peripheral surface of the bearing. The clearance is larger than a radial displacement amount of the O-ring.

Abstract: An electric compressor includes a rotation shaft, a compressor impeller, a rotor portion, a stator portion, and a motor housing. The motor housing includes an inner housing which includes a first cylindrical portion surrounding and holding the stator portion and an outer housing which includes a second cylindrical portion surrounding and holding the first cylindrical portion of the inner housing. An outer peripheral surface of the stator portion is in contact with an inner peripheral surface of the first cylindrical portion of the inner housing. An outer peripheral surface of the first cylindrical portion is provided with a first groove portion disposed to turn around an axis of the rotation shaft by one turn or more and the first groove portion includes a spiral groove portion.

Abstract: A centrifugal compressor including: a impeller; a wall portion having an opposed surface that is spaced apart from and opposed to a back surface of the impeller; an insertion hole, which is formed in the wall portion, and is configured to receive a shaft inserted into the insertion hole; a bearing, which is provided in the insertion hole or apart from the impeller with respect to the insertion hole, and is configured to axially support the shaft through interposition of grease being a lubricant inside; an electric motor which is provided on a side opposite to the impeller over the wall portion; and an opposed hole, which is formed in the wall portion, is disclosed. The opposed hole has one end opened in the opposed surface and another end opened at a position opposed to a stator of the electric motor on a side opposite to the impeller.

Abstract: A rotary machine includes rotating shaft supported with respect to an end wall of a housing. The rotary machine includes a bearing that is attached to the rotating shaft and rotatably supports the rotating shaft to the housing, a cylindrical holding portion that is provided in the end wall of the housing and extends in an axial direction of the rotating shaft, and a cylindrical bearing sleeve that is fixed to the holding portion and surrounds the bearing. The bearing sleeve includes a surrounding portion that surrounds the bearing and a protruding portion that protrudes from the surrounding portion toward the end wall. The protruding portion and the holding portion overlap each other in a radial direction of the rotating shaft, and the bearing sleeve is fixed to the end wall by fitting the protruding portion into the holding portion.

Abstract: An exhaust gas energy recovery device includes a power generation device driven by a turbine configured to rotate by an exhaust gas, a switching element connected to the power generation device, a first terminal connected to the power generation device via the switching element and for being connected to a first power storage device, and a second terminal connected to the power generation device and for being connected to a second power storage device, in which a terminal voltage of the first power storage device is lower than a terminal voltage of the second power storage device, and the switching element switches a destination to be charged by the power generation device to either the first power storage device or the second power storage device on the basis of magnitude of a direct current voltage output from the power generation device.

Abstract: An electric compressor includes: a rotary shaft to which a compressor impeller is attached; a stator portion which is disposed around the rotary shaft; and a motor housing which accommodates the stator portion. The motor housing includes an inner housing which includes a first cylindrical portion surrounding and holding the stator portion and an outer housing which includes a second cylindrical portion surrounding and holding the first cylindrical portion of the inner housing. Between an outer surface of the inner housing and an inner surface of the outer housing, a cooling jacket portion is formed in a part of a circumferential direction about the rotary shaft. The inner housing includes a first end wall portion which is formed to be continuous to the first cylindrical portion and extends inward in relation to an outer peripheral portion of the stator portion in a radial direction of the rotary shaft.

Abstract: A centrifugal compressor includes a compressor impeller attached to a rotary shaft and a housing accommodating the rotary shaft and the compressor impeller. The housing includes a suction portion formed upstream of the compressor impeller and a high pressure part formed on a rear face side of the compressor impeller and having a pressure higher than a pressure in the suction portion during rotation of the compressor impeller. The housing has a discharge passage formed for connecting the high pressure part to a low pressure part including the suction portion and a gas flow path upstream of the suction portion.

Abstract: Provided is an electric compressor which includes a motor which rotates a rotary shaft of a impeller; a housing which accommodates the motor; a plate attached to the housing mounted with a control circuit configured to drive and control the motor; and a refrigerant flow passage provided between the housing and the plate. At least a part of the refrigerant flow passage is formed by a heat radiation fin provided on at least one of the housing and the plate.

Abstract: An electric compressor includes a casing which accommodates an inverter and includes a bottom plate on which a power board of the inverter is mounted and a cooling water passage which is provided in a housing and opens to a bottom plate of the casing. The bottom plate of the casing includes a first surface on which a power board is mounted and a second surface opposite to the first surface. A metal plate is buried at a position corresponding to the power board in the bottom plate and a rear surface of the metal plate is exposed to the second surface side and faces the cooling water passage.

Abstract: A rotary machine is provided with: a bearing that supports a rotary shaft of an impeller; a bearing support part that supports an outer circumference of the bearing; a key groove that is formed in the bearing and the bearing support part and extends along a rotary shaft line direction of the rotary shaft; and a key member that is inserted into the key groove. The bearing support part is provided with an outer regulating part that can contact one end part of the key member inside the key groove. An outer ring of the bearing is provided with an inner regulating part that can contact another end part of the key member inside the key groove. A distance between the outer regulating part and the inner regulating part is longer than a length of the key member in the rotary shaft line direction.

Abstract: According to an aspect of the present disclosure, a seal structure includes a rotary shaft that is provided inside a housing, a metal-made surrounding portion of the housing that surrounds the rotary shaft in a radial direction of the rotary shaft, and a resin-made seal member that faces an inner circumferential surface of the surrounding portion and rotates together with the rotary shaft.

Abstract: An electric turbocharger includes an electric motor which rotationally drives a rotating blade, a motor housing which accommodates the electric motor therein, a controller which is disposed outside the motor housing and controls the driving of the electric motor, and a power supply mechanism which supplies a current from the controller to the electric motor through a through-hole communicating the inside and the outside of the motor housing, in which the power supply mechanism includes a rod which is hermetically sealed while being inserted through the through-hole, a connector which is connected to at least one end of the rod, and a busbar which is connected to the connector, and in which the connector absorbs a relative positional displacement of the rod with respect to the connector.

Abstract: Sealing performance for a high-pressure space and a low-pressure space is improved. An electric device (electric supercharger includes: a partition wall configured to partition between a motor chamber having a relatively high pressure and an inverter chamber having a relatively low pressure; an inverter, which is provided in the inverter chamber, and is configured to supply power; a motor, which is provided in the motor chamber, and is configured to operate with supply of power from the inverter; and a bus-bar device, which is mounted to the partition wall by being inserted into a partition wall through hole formed in the partition wall, and is configured to connect the inverter and the motor to each other.

Abstract: An actuator power transmission mechanism includes: a first lever that rotates by power of an actuator; a drive shaft that has one end fixed to the first lever and rotates integrally with the first lever; one or more nozzle vanes that are directly or indirectly coupled to the other end side of the drive shaft, rotate interlocking with the drive shaft, and adjust an inclination angle with respect to a flow direction of a fluid; and a bearing that has an insertion hole through which the drive shaft is inserted, and that rotatably supports the drive shaft, and a suppression portion that suppresses infiltration of water that runs along an outer peripheral surface of the bearing into the insertion hole is provided at the outer peripheral surface of the bearing.

Abstract: An impeller includes: a main body portion which is increased in diameter from one side to another side in a rotation axis direction; a thinned portion, which is formed in a back surface of the main body portion so as to be oriented toward the another side in the rotation axis direction, and is recessed toward the one side in the rotation axis direction; a plurality of full blades which are formed on an outer circumferential surface of the main body portion so as to be oriented toward the one side in the rotation axis direction; and a plurality of splitter blades, which are formed on the outer circumferential surface, and have end portions being located on the one side in the rotation axis direction and being positioned on the another side in the rotation axis direction with respect to the full blades.

Abstract: Provided is a centrifugal compressor, including: a impeller; a wall portion having an opposed surface that is spaced apart from and opposed to a back surface of the impeller; an insertion hole, which is formed in the wall portion, and is configured to receive a shaft inserted to the insertion hole; a bearing, which is provided in the insertion hole or apart from the impeller with respect to the insertion hole, and is configured to axially support the shaft through interposition of grease being a lubricant inside; an electric motor which is provided on a side opposite to the impeller over the wall portion; and an opposed hole, which is formed in the wall portion, and has one end opened in the opposed surface and another end opened at a position opposed to a stator of the electric motor on a side opposite to the impeller.

Abstract: A rotary machine includes an impeller which is attached to one end portion in an axial direction of a rotating shaft; and a bearing which is attached to the rotating shaft on a rear surface side of the impeller. The impeller includes a cylindrical boss portion, a hub portion, and a blade portion. A rear surface of the hub portion is provided with a recessed portion recessed toward the one end side from an end edge on the rear surface side of the hub portion in the axial direction. The other end in the axial direction of the boss portion is disposed inside the recessed portion, and an end surface on the one end side of the bearing is disposed inside the recessed portion.

Abstract: A rotary machine includes rotating shaft supported with respect to an end wall of a housing. The rotary machine includes a bearing that is attached to the rotating shaft and rotatably supports the rotating shaft to the housing, a cylindrical holding portion that is provided in the end wall of the housing and extends in an axial direction of the rotating shaft, and a cylindrical bearing sleeve that is fixed to the holding portion and surrounds the bearing. The bearing sleeve includes a surrounding portion that surrounds the bearing and a protruding portion that protrudes from the surrounding portion toward the end wall. The protruding portion and the holding portion overlap each other in a radial direction of the rotating shaft, and the bearing sleeve is fixed to the end wall by fitting the protruding portion into the holding portion.