Abstract: An example motor rotor includes a cylindrical magnet which is disposed around a rotation shaft, a protective layer which is disposed around the magnet, and a middle resin portion which is disposed between the magnet and the protective layer. The magnet has a cylindrical shape that extends continuously in a circumferential direction of the rotation shaft. A surface treatment portion is formed on at least one of an outer peripheral surface of the magnet or an inner peripheral surface of the protective layer, to impart adhesion with the middle resin portion.

Abstract: An example rotary machine includes a motor including a rotor and a stator, and a cooling jacket disposed around the stator. The cooling jacket includes an inner body part being cylindrical and in contact with the stator, an outer body part being cylindrical and surrounding the inner body part, and a groove through which a cooling medium passes, the groove circling helically around an outer circumference of the inner body part at least once. The groove has a pair of side surfaces opposed in a direction of an axis of rotation of the rotor, and a bottom surface connected to each of the pair of side surfaces. Each of the pair of side surfaces is formed having a draft angle inclined away from each other, the draft angle inclined relative to a release direction orthogonal to the axis of rotation.

Abstract: An operation mechanism of a turbocharger includes: a driving member undergoes a reciprocating movement; a link plate rotationally coupled to the driving member through a first hinge-portion, wherein a first rotation-center of the first hinge-portion is moves linearly along a virtual line in a reciprocating manner in response to the reciprocating movement; and an operation lever. The operation lever includes: a first end operates a flow regulator of the turbocharger, wherein a swing center of the operation lever is located at the first end; and a second end rotationally coupled to the link plate through a second hinge-portion including a second rotation-center, wherein the second end is swings relative to the swing center when the first rotation-center moves linearly along the virtual line, and wherein a distance from the swing center to the second rotation-center is shorter than a distance from the swing center to the virtual line.

Abstract: A valve structure includes: a valve unit including a valve body, a shaft portion extending from the valve body, and a separating portion provided on the shaft portion and spaced apart from the valve body; a mounting plate located between the valve body and the separating portion and including an insertion hole into which the shaft portion is inserted; a holding portion including a first holding surface provided on the mounting plate, and a second holding surface provided on the valve unit and spaced apart from the first holding surface; a protrusion provided on one of the valve unit and the mounting plate, an end of the protrusion protruding beyond the first and second holding surfaces; and an elastic body including a contact portion located between the first and second holding surfaces, and a pressed portion located inside or outside the contact portion and contacting the protrusion.

Abstract: A semi-floating bearing (bearing) including: a main body, which has an annular shape, extends in a direction intersecting with a vertical direction, and has a shaft inserted through the main body; a radial bearing surface formed on an inner peripheral surface of the main body; and a plurality of oil supply grooves, which extend in an axial direction of the main body, are formed in the radial bearing surface at positions excluding a lowermost portion of the radial bearing surface in the vertical direction at intervals in a circumferential direction, and are arranged so as to be line-symmetric with each other with respect to a vertical axis in a cross section orthogonal to the axial direction of the radial bearing surface such that the interval between the oil supply grooves in the circumferential direction is the largest on a vertically lower side.

Abstract: An operation mechanism of a turbocharger includes: a driving member undergoes a reciprocating movement; a link plate rotationally coupled to the driving member through a first hinge-portion, wherein a first rotation-center of the first hinge-portion is moves linearly along a virtual line in a reciprocating manner in response to the reciprocating movement; and an operation lever. The operation lever includes: a first end operates a flow regulator of the turbocharger, wherein a swing center of the operation lever is located at the first end; and a second end rotationally coupled to the link plate through a second hinge-portion including a second rotation-center, wherein the second end is swings relative to the swing center when the first rotation-center moves linearly along the virtual line, and wherein a distance from the swing center to the second rotation-center is shorter than a distance from the swing center to the virtual line.

Abstract: This electric compressor includes a rotation shaft including a first end and a second end, a compressor impeller which is mounted on the first end of the rotation shaft and includes a back surface facing the second end, a motor disposed between the first end and the second end of the rotation shaft, a wall portion which separates an impeller space and a motor space from each other and includes a reference wall surface having a shape along the back surface of the compressor impeller, and a bypass hole which is formed in the wall portion to connect the impeller space to the motor space and includes a first opening which opens to the impeller space. In the wall portion, a recessed portion which is disposed around the first opening of the bypass hole and recessed from the reference wall surface is formed.

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: An example motor rotor includes a cylindrical magnet which is disposed around a rotation shaft, a protective layer which is disposed around the magnet, and a middle resin portion which is disposed between the magnet and the protective layer. The magnet has a cylindrical shape that extends continuously in a circumferential direction of the rotation shaft. A surface treatment portion is formed on at least one of an outer peripheral surface of the magnet or an inner peripheral surface of the protective layer, to impart adhesion with the middle resin portion.

Abstract: An IPM motor includes a rotation shaft, a rotor, and a stator. The rotor includes a rotor body, a magnet, and a resin filled between the magnet and the rotor body. The magnet includes a magnet main surface, a magnet back surface, and a magnet side surface. The rotor body includes a slot side surface facing the magnet side surface. The slot side surface includes a first flat surface portion and an inclined surface portion. The resin includes a first side surface resin portion filled between the magnet side surface and the first flat surface portion and a second side surface resin portion filled between the magnet side surface and the inclined surface portion.

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: An example rotary machine includes a motor including a rotor and a stator, and a cooling jacket disposed around the stator. The cooling jacket includes an inner body part being cylindrical and in contact with the stator, an outer body part being cylindrical and surrounding the inner body part, and a groove through which a cooling medium passes, the groove circling helically around an outer circumference of the inner body part at least once. The groove has a pair of side surfaces opposed in a direction of an axis of rotation of the rotor, and a bottom surface connected to each of the pair of side surfaces. Each of the pair of side surfaces is formed having a draft angle inclined away from each other, the draft angle inclined relative to a release direction orthogonal to the axis of rotation.

Abstract: A turbocharger impeller includes: a cylindrical boss portion disposed around a rotary axis; a hub portion connected to the boss portion and extends in a radial direction of the rotary axis; and a blade portion protruding from the boss portion and the hub portion toward a tip end side in the direction of the rotary axis and the radial direction. At least a part of an outer peripheral part of the hub portion in the radial direction or a part of the blade portion is provided with a resin second section and the second section is bonded to an aluminum first section. The turbocharger impeller includes the aluminum first section and the resin second section.

Abstract: This electric compressor includes a rotation shaft including a first end and a second end, a compressor impeller which is mounted on the first end of the rotation shaft and includes a back surface facing the second end, a motor disposed between the first end and the second end of the rotation shaft, a wall portion which separates an impeller space and a motor space from each other and includes a reference wall surface having a shape along the back surface of the compressor impeller, and a bypass hole which is formed in the wall portion to connect the impeller space to the motor space and includes a first opening which opens to the impeller space. In the wall portion, a recessed portion which is disposed around the first opening of the bypass hole and recessed from the reference wall surface is formed.

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 turbocharger impeller includes: a cylindrical boss portion disposed around a rotary axis; a hub portion connected to the boss portion and extends in a radial direction of the rotary axis; and a blade portion protruding from the boss portion and the hub portion toward a tip end side in the direction of the rotary axis and the radial direction. At least a part of an outer peripheral part of the hub portion in the radial direction or a part of the blade portion is provided with a resin second section and the second section is bonded to an aluminum first section. The turbocharger impeller includes the aluminum first section and the resin second section.

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 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: 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: 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.