Ihi Corporation

Takuya Ozasa

Kuniaki Iizuka

Tatsumi Inomata

Takashi Yoshida

Ryosuke Yumoto

Yuji Sasaki

Kouta Kimachi

Tomohisa Okada

Koutarou Itou

Taiki Yoshizaki

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.

Electric compressor

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.

Centrifugal compressor

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.

Turbocharger impeller

Provided is a rotary machine including a rotating resinous impeller, a rotary shaft penetrating the impeller, and a fastening portion screwed to the rotary shaft, in which the rotary shaft includes a penetrating shaft portion facing an inner peripheral surface of the impeller, a tip shaft portion screwed to the fastening portion, and a fastening reception portion sandwiching the impeller between the fastening reception portion and the fastening portion, the penetrating shaft portion has a non-circular portion and an outline of a cross section of the non-circular portion orthogonal to a rotational axis deviates from a perfect circle about the rotational axis, and the impeller includes a connecting portion engaging with the non-circular portion.

Rotary machine

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.

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.

Exhaust gas energy recovery device

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.

Impeller and supercharger

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.

Electric turbocharger

A motor rotor is configured to include a tubular inner sleeve, an annular magnet mounted on the outside of the inner sleeve in a radial direction of the inner sleeve, and a ring member disposed on the outside of the magnet in an axial direction of the inner sleeve and mounted on the outside of the inner sleeve in the radial direction of the inner sleeve. A linear expansion coefficient of the inner sleeve is higher than the linear expansion coefficient of the magnet. The ring member is mounted on the inner sleeve by shrinkage-fitting, and a gap is provided between the ring member and the magnet in the axial direction of the inner sleeve.

Motor rotor, supercharger, and method of manufacturing motor rotor

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.

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.

Centrifugal compressor having equalizing vent to prevent grease from being pushed out of a bearing

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.

Growing community of inventors

Koto-ku, Japan

Takuya Ozasa