Abstract: A centrifugal rotation machine includes a rotation shaft, a plurality of impellers rotating along with the rotation shaft, a casing defining a return flow channel configured to guide the fluid from the front-stage impeller to the rear-stage impeller, and a plurality of return vanes installed in the return flow channel, the return flow channel includes a return bend section guiding the fluid G, which has been sent from the front-stage impeller to the outside in the radial direction, to the inside in the radial direction, the return bend section includes a first curved portion and a second curved portion connected to the downstream side of the first curved portion, and the radius of curvature of an inside wall surface of the second curved portion in the radial direction is greater than the radius of curvature of an inside wall surface of the first curved portion in the radial direction.

Abstract: A stationary vane includes: a side surface exposed to a fluid and that is provided along a flow direction of the fluid; and corner portions provided in the side surface and that generates, at a downstream side in the flow direction of the fluid, streamwise vortexes each having a vortex axis that is parallel to the flow direction of the fluid.

Abstract: The present invention provides a rotary machine intake casing which, by using a simple configuration, makes it possible to reduce asymmetry between the flow speed of air flowing in a forward direction relative to the direction of rotation of a rotating shaft of a compressor and the flow speed of air flowing in the opposite direction.

Abstract: A centrifugal compressor is able to cause air to efficiently flow to an impeller thereof, and enables improvement of operating efficiency. The centrifugal compressor has: a casing having an inlet flow channel and a connection flow channel formed therein, the inlet flow channel having a suction port provided at one place thereof, the connection flow channel being connected to the inlet flow channel; a main shaft inserted in the casing; an impeller fixed to the main shaft and arranged in the inlet flow channel; and an inlet guide vane unit having a plurality of inlet guide vanes arranged upstream of the impeller of the inlet flow channel. In the inlet guide vane unit, an arrangement interval between inlet guide vanes at a suction port side is narrower than an arrangement interval of inlet guide vanes at a side opposite to the suction port side.

Abstract: An impeller for a centrifugal rotary machine has a plurality of blades (4) arranged at intervals in a circumferential direction on a face facing a direction of an axis of a disc (3) formed in a discoid shape about the axis, wherein the blades (4) each include a first section (10A) rising from the disc (3) and inclined toward an opposite direction of a rotary direction (R) as the distance from the disc and a second section (11A) continuing from the first section (10A) and inclined toward a forward direction of the rotary direction (R) as the distance from the disc (3) between the leading edges and the trailing edges in the blades (4).

Abstract: Provided is an impeller and a fluid machine which have an annular hub (21) and a plurality of blades (22) radially arranged along an outer peripheral surface of the hub (21). On a pressure surface (P1) of the blade (22), there are provided a first pressure surface (31) extending from the hub (21) side at an angle of 90 degrees or less with respect to the forward direction of the rotation direction (A), and a second pressure surface (32) extending from the first pressure surface (31) at an angle of more than 90 degrees with respect to the forward direction of the rotation direction (A). This configuration reduces a low-energy fluid stagnating on a suction surface side of the blade, achieving higher impeller efficiency.

Abstract: Provided is a centrifugal compressor impeller capable of improving machine operation efficiency, by making the total pressure distribution of a fluid that flowed into a vaneless diffuser constant. To this end, the provided centrifugal compressor impeller has a plurality of vanes radially provided around a rotating shaft, uses centrifugal force produced by rotating along with the rotating shaft, pumps a fluid (G) taken in from the leading edge side of the vanes to the outside in the radial direction of the rotating shaft from the trailing edge side of the vanes, and thereafter, discharges the fluid (G) into a vaneless diffuser. Furthermore, the edge front end and the edge rear end of the trailing edge are positioned to the outside in the radial direction of the rotating shaft relative to the edge center section of the trailing edge.

Abstract: The invention provides a grease composition used for lubricating a mechanical part having a steel portion to be lubricated which performs a rolling motion and a rolling and sliding motion, containing a base oil, a thickener and an additive, wherein the additive includes at least one compound selected from the group consisting of polyethylene wax, oxidized polyethylene wax, polypropylene wax, montan wax and amide wax.

Abstract: According to one embodiment, an electronic device includes: a housing configured to house an electronic component; a first housing member comprising a first wall; a second housing member comprising a second wall overlapping the first wall with a gap therebetween; a first connecting structure configured to fix the first wall and the second wall; a second connecting structure positioned closer to an end of the first wall or the second wall than the first connecting structure and configured to connect the first wall and the second wall with play between the first wall and the second wall.

Abstract: The invention provides a lubricant composition for an eccentrically oscillating speed reducer of planetary gear type, which is capable of extending the life of the speed. reducer under high temperatures and keeping low input torque at low temperatures, and includes (a) a base oil containing a synthetic oil, (b) a hydrocarbon wax, and (c) at least one calcium salt selected from the group consisting of a calcium salt of petroleum sulfonic acid, a calcium salt of alkyl aromatic sulfonic acid, a calcium salt of oxidized wax, an overbasic calcium salt of petroleum sulfonic acid, an overbasic calcium salt of alkyl aromatic sulfonic acid, and an overbasic calcium salt of oxidized wax.

Abstract: The present invention is provided with: a disk (2) that rotates around an axis (O); and, on the surface of one axial (O) side of the disk (2), a plurality of blades (3) that are provided at intervals in the circumferential direction and demarcate a channel (10) in which a fluid that flows in from one side in the axial (O) direction is discharged toward the outer side in the radial direction. Therein, holes (H) are formed in the blades (3), said holes communicating with a pressure surface (p) that faces the front side in the rotational direction, and with a suction surface (n) that faces the rear side in the rotational direction.

Abstract: An impeller comprises a disc that rotates about an axis, and blades a plurality of which are disposed in the circumferential direction of the disc with intervals therebetween. Of the angles formed by a tangent line to a projection curve line which is a center curve line of the thickness of the blade projected from the axis direction to the disc, and an imaginary line orthogonal to a line connecting the axis and a tangent point between the projection curve line and the tangent line, if the angle formed at the rotation direction rear-side and the outer peripheral side of the disc is defined as a blade angle, then the blade angle of the blade has a prescribed gradual increase region and gradual decrease region from the center towards the outside, and at the center of an inflection region of the gradual increase region and of the gradual decrease region, provided is a partial gradual decrease region having a smaller blade angle decrease amount than the blade angle increase amount of the gradual increase region.

Abstract: According to one embodiment, an electronic device includes a housing, a member, and an intervening portion. The housing includes a pair of first hook portions extending in one direction and an opening extending in the one direction and being between the pair of first hook portions. The member includes a pair of second hook portions configured to catch the first hook portions and is movable in the opening in the one direction. The intervening portion is configured to be between the pair of second hook portions. The intervening portion is configured to keep the member to be in a movable state and to come into contact with the second hook portions that elastically approach to each other such that the second hook portions keep catching the first hook portions.

Abstract: Provided is an impeller and a fluid machine which have an annular hub (21) and a plurality of blades (22) radially arranged along an outer peripheral surface of the hub (21). On a pressure surface (P1) of the blade (22), there are provided a first pressure surface (31) extending from the hub (21) side at an angle of 90 degrees or less with respect to the forward direction of the rotation direction (A), and a second pressure surface (32) extending from the first pressure surface (31) at an angle of more than 90 degrees with respect to the forward direction of the rotation direction (A). This configuration reduces a low-energy fluid stagnating on a suction surface side of the blade, achieving higher impeller efficiency.

Abstract: According to one embodiment, a stand for an electronic device, includes a first housing and a connector. The connector is configured to detachably connect to the electronic device and to be rotatably supported by the first housing. The electronic device includes a display face and a second housing. The second housing includes a first opening formed at an end thereof. The connector includes a support, a protrusion, and a base member. The support is configured to support the second housing from outside. The protrusion is spaced from the support and inserted into the first opening. The base member includes a first part configuring at least a portion of the support and a second part integrated with the first part and configuring at least a portion of the protrusion.

Abstract: A centrifugal rotation machine includes a rotation shaft, a plurality of impellers rotating along with the rotation shaft, a casing defining a return flow channel configured to guide the fluid from the front-stage impeller to the rear-stage impeller, and a plurality of return vanes installed in the return flow channel, the return flow channel includes a return bend section guiding the fluid G, which has been sent from the front-stage impeller to the outside in the radial direction, to the inside in the radial direction, the return bend section includes a first curved portion and a second curved portion connected to the downstream side of the first curved portion, and the radius of curvature of an inside wall surface of the second curved portion in the radial direction is greater than the radius of curvature of an inside wall surface of the first curved portion in the radial direction.

Abstract: In general, according to one embodiment, an electronic device includes a first component, a wall member, and an accommodating part. The wall member includes a plurality of first walls surrounding the first component, a gap being formed between at least one of the first walls and the first component. The accommodating part is between the first component and the at least one of the first walls, and is configured to accommodate a second component.

Abstract: An impeller for a centrifugal rotary machine has a plurality of blades (4) arranged at intervals in a circumferential direction on a face facing a direction of an axis of a disc (3) formed in a discoid shape about the axis, wherein the blades (4) each include a first section (10A) rising from the disc (3) and inclined toward an opposite direction of a rotary direction (R) as the distance from the disc and a second section (11A) continuing from the first section (10A) and inclined toward a forward direction of the rotary direction (R) as the distance from the disc (3) between the leading edges and the trailing edges in the blades (4).

Abstract: According to one embodiment, an electronic device includes a housing, a member, and an intervening portion. The housing includes a pair of first hook portions extending in one direction and an opening extending in the one direction and being between the pair of first hook portions. The member includes a pair of second hook portions configured to catch the first hook portions and is movable in the opening in the one direction. The intervening portion is configured to be between the pair of second hook portions. The intervening portion is configured to keep the member to be in a movable state and to come into contact with the second hook portions that elastically approach to each other such that the second hook portions keep catching the first hook portions.

Abstract: According to one embodiment, a stand for an electronic device, includes a first housing and a connector. The connector is configured to detachably connect to the electronic device and to be rotatably supported by the first housing. The electronic device includes a display face and a second housing. The second housing includes a first opening formed at an end thereof. The connector includes a support, a protrusion, and a base member. The support is configured to support the second housing from outside. The protrusion is spaced from the support and inserted into the first opening. The base member includes a first part configuring at least a portion of the support and a second part integrated with the first part and configuring at least a portion of the protrusion.