Abstract: In a wedge looseness diagnosis which is performed by striking wedges of a rotary electric machine, a variation of a wave form of a strike sound is reduced with respect to a variation of an amount of looseness of the wedges, and it is difficult that a slight difference of the amount of the looseness of the wedges is discriminated, so that the wedges are struck by a strike portion in a state where the wedges are pressed by a pressure portion which presses the wedges, and a strike sound at a high frequency is reduced, whereby an amount of a variation of magnitude of the strike sound is enlarged with respect to a valuation of the amount of the looseness of the wedges, and the amount of the looseness of the wedges is judged in accordance with the strike sound which is obtained by a strike sound measuring portion.

Abstract: There is provided a planar member having a flat portion that makes contact with the inner circumferential surface of an endless track at a position at a traveling subject side with respect to a virtual straight line that connects a vertex, at the traveling subject side, in the outer circumferential surface of a first pulley and a vertex, at the traveling subject side, in the outer circumferential surface of a second pulley.

Abstract: A centrifugal fan includes a motor, a support body, a rotating body, and a housing. The motor includes a rotor hub that rotates around a central axis extending up and down. The support body is fixed to and rotates together with the rotor hub. The rotating body is different from the support body in material. The rotating body is a continuous porous body. The housing accommodates the rotating body, the support body, and the motor. The housing includes a first air inlet open in an axial direction and at least one air outlet open in a radial direction. A radially inner surface of the rotating body opposes a radially outer surface of the rotor hub with a gap interposed therebetween. The rotating body is fixed to at least one of an axially upper surface and an axially lower surface of the support body.

Abstract: A centrifugal fan includes a motor, a support body, first and second rotating bodies, and a housing. The motor includes a rotor hub. The support body is fixed to and rotates together with the rotor hub. The first and second rotating bodies are continuous porous bodies and are different in material than the support body. The first rotating body is located on an axially upper surface of the support body. The second rotating body is located on an axially lower surface of the support body. The housing accommodates the first and second rotating bodies, the support body, and the motor. The housing includes a first air inlet and an air outlet. A radially inner surface of the first rotating body opposes a radially outer surface of the rotor hub with a gap interposed therebetween.

Abstract: A centrifugal fan includes a motor, a support body, a rotating body, and a housing. The motor includes a rotor hub that rotates around a central axis extending up and down. The support body is fixed to the rotor hub and rotates together with the rotor hub. The rotating body is different from the support body in material. The rotating body is a continuous porous body. The housing accommodates the rotating body, the support body, and the motor. The housing includes an air inlet open in an axial direction and at least one air outlet open in a radial direction. A radially inner surface of the rotating body opposes a radially outer surface of the rotor hub with a gap interposed therebetween.

Abstract: A centrifugal fan includes a motor, a support body, a rotating body, and a housing. The motor includes a rotor hub that rotates around a central axis extending up and down. The support body is fixed to the rotor hub and rotates together with the rotor hub. The rotating body is different from the support body in material and is a continuous porous body. The housing accommodates the rotating body, the support body, and the motor. The housing includes an air inlet open in an axial direction and at least one air outlet open in a radial direction. A radially inner surface of the rotating body opposes a radially outer surface of the rotor hub with a gap interposed therebetween. The rotating body is fixed to the support body to be replaceable.

Abstract: In an air blower, an exhaust includes fins and extends in a first direction that is a radial component of an impeller. Assuming that a first virtual circle is a circle connecting ends on a side opposed to the impeller in a fin group in a first direction, and that a second virtual circle is a circle larger than a virtual circle connecting radially outer edges of blades of the impeller with a central axis as a center in diameter and is connected to the first virtual circle at one point, a radius of the first virtual circle is larger than a radius of the second virtual circle.

Abstract: In an air blower, an exhaust extends in a first direction that is a radial component of an impeller, and includes fins. Assuming that a distance from a line segment extending from a central axis in the first direction to an array of the fins upstream of an airflow caused by rotation of the impeller is a first predetermined distance, at least a portion of the fins are disposed in a first region upstream from the first predetermined distance and in a second region downstream from the first predetermined distance. The distance between the fins in the first region is shorter than the distance between the fins in the second region.

Abstract: A wedge tapping device for a rotating electrical machine to be inserted through a gap between a rotor and a stator to tap a wedge. The wedge tapping device includes: a tapping portion configured to tap the wedge and having a tapping force measuring portion configured to measure a tapping force of the tapping; an energy supplying portion configured to apply tapping energy to the tapping portion; an absorbing portion configured to suppress energy to be applied to the tapping portion; and a tapping arm, on which the tapping portion is disposed, and which has a longitudinal direction in a direction perpendicular to a direction in which the tapping portion performs tapping. The tapping arm is disposed so that the longitudinal direction is parallel to a rotation axis when the tapping is performed in the gap.

Abstract: Provided is an insertion guide that performs accurate rotation correction between a shaft and a hole and phase correction between the shaft and hole. The shaft includes: a first guide portion at a distal end of the shaft having a diameter smaller than a diameter of the hole; a second guide portion, provided on a base end side of a first narrow cylindrical portion, and having a diameter smaller than the diameter of the hole and larger than a diameter of the first narrow cylindrical portion; and a third guide portion, provided at the distal end of the shaft, and is a recessed portion to be engaged with a protruding portion formed in the hole. The shaft being inclined with respect to the hole, is brought into contact with the hole at two points or less before the third guide portion is brought into contact with the protruding portion.

Abstract: A control moment gyroscope includes: an inner gimbal; a rotor that is held by the inner gimbal to be rotatable around a spin axis; a spin motor that is disposed on the inner gimbal, and that rotates the rotor around the spin axis; a stator that holds the inner gimbal to be rotatable around a gimbal axis that is perpendicular to the spin axis; gimbal bearings that are disposed between the inner gimbal and the stator to face each other from opposite sides of a plane that is perpendicular to the gimbal axis and that includes the spin axis, to be in contact with the plane in question, or to include the plane in question; and a torque module that is disposed on the stator, and that rotates the inner gimbal around the gimbal axis.

Abstract: A cooling apparatus includes an impeller, a motor, a base portion, and a motor circuit board. The impeller includes a plurality of blades and a blade support portion. Of the plurality of blades, at least one pair of circumferentially adjacent blades are arranged to have a channel defined therebetween, the channel extending from axially upper edges to axially lower edges of the blades, and being arranged to be open toward the upper surface of the base portion. The base portion includes a heat source contact portion with which a heat source is to be in contact. At least one of the blades includes a blade edge opposed portion having an axially lower edge arranged opposite to the upper surface of the base portion. An outermost edge portion of the motor circuit board is arranged radially inward of a radially inner end portion of the blade edge opposed portion.

Abstract: A sleeve housing of a bearing mechanism according to a preferred embodiment of the present invention includes a cylindrical portion arranged to cover outer circumferences of a sleeve and a plate portion, and a bottom portion arranged to close a lower portion of the cylindrical portion. The bottom portion includes a plurality of projecting portions arranged in a circumferential direction in an upper surface of the bottom portion. Each projecting portion is arranged to project upward to be in contact with a lower surface of the sleeve. Each of the projecting portions and the plate portion are arranged radially opposite each other. At least a portion of an adhesive is arranged to exist between an outer circumferential surface of the sleeve and an inner circumferential surface of the cylindrical portion.

Abstract: A mirror replacement device includes a gripping mechanism to grip a segment mirror, a fine drive mechanism to change a position and a posture of the gripping mechanism, a lift mechanism for the segment mirror, a first detector to detect a relative position and a relative posture between a comparison object and a target object, a second detector to detect a bend of the fine drive mechanism, and a mirror replacement controller to replace the segment mirror based on detection signals output from the above-mentioned detectors. The controller determines whether the first detector can successfully perform a measurement. When it is determined that the measurement can be successfully performed, the control is performed based on the detection signal output from the first detector. When it is determined that the measurement cannot be successfully performed, the control is performed based on the detection signal output from the second detector.

Abstract: A blower fan includes a lower plate portion made of a material having a thermal conductivity of 1.0 W/(m·K) or more, and a side wall portion made of a material having a thermal conductivity of 1.0 W/(m·K) or more. An upper plate portion arranged to cover an upper side of the impeller includes an air inlet. The upper plate portion, the side wall portion, and the lower plate portion are arranged to together define an air outlet on the lateral side of the impeller. The blower fan further includes a heat source contact portion with which a heat source is to be in contact, the heat source contact portion being arranged in a surface of the blower fan which faces away from the impeller. The heat source contact portion and the tongue portion are arranged to at least partially overlap with each other in the plan view.

Abstract: A fan includes a stationary portion; a bearing mechanism; and a rotating portion. The rotating portion includes an impeller including a plurality of blades and an annular impeller cup arranged to support the blades. The rotor portion includes a cover portion and a cylindrical portion. The impeller is fixed to an outer circumferential surface of the cylindrical portion of the rotor portion. The outer circumferential surface of the cylindrical portion and an inner circumferential surface of the impeller cup have a joining portion therebetween. At least one of the outer circumferential surface of the cylindrical portion and the inner circumferential surface of the impeller cup includes a groove portion recessed radially from the joining portion. The groove portion includes an upward facing surface. An adhesive is arranged in the groove portion. At least a portion of the adhesive is arranged above the upward facing surface of the groove portion.

Abstract: The fan includes an impeller, a motor, and a housing. The housing includes a side wall portion and a lower plate portion. at least one of the lower plate portion and an upper plate portion arranged to cover an upper side of the impeller includes an air inlet. The upper plate portion, the side wall portion, and the lower plate portion are arranged to together define an air outlet on a lateral side of the impeller. At or near an opposite end of the heat pipe, the heat pipe includes a contact portion arranged to be in contact with one of an upper surface of the lower plate portion and a lower surface of the upper plate portion. A longitudinal direction of at least a portion of the heat pipe extends at an angle with respect to the air outlet.

Abstract: A wire electric discharge machining apparatus is constructed in such a manner as to include: a wire electrode having a plurality of cutting wire portions that are separated from one another in parallel and are opposed to a workpiece; a machining power supply that generates a pulsed machining voltage; a plurality of power feed contact units that are electrically connected to the cutting wire portions and apply the machining voltage between the cutting wire portions and the workpiece; and a nozzle that ejects machining liquid from an ejection opening toward an electrode gap along the cutting wire portions.

Abstract: A heat module includes a fan and a heat pipe. A flat portion of the heat pipe includes a recessed portion being recessed toward a center of the heat pipe in a cross section. A heat receiving portion arranged between the heat source and the heat pipe includes a heat source contact portion arranged to be in thermal contact with the heat pipe. In at least a portion of the heat pipe which extends between a portion of the heat pipe which is in thermal contact with the fan contact portion and a portion of the heat pipe which is in thermal contact with the heat source contact portion, a difference between a maximum axial height of the heat pipe and a minimum axial height of a portion of the heat pipe where the recessed portion is defined is smaller than a wall thickness of the recessed portion.

Abstract: A motor includes a stationary unit and a rotary unit. The stationary unit includes a stator, a base portion having at least one hole extending in the up-down direction, and a flexible wiring substrate. The flexible wiring substrate reaches a position higher than a lower surface of the base portion through at least one hole and is arranged to supply electric power to the stator. The flexible wiring substrate includes a connection portion arranged higher than the lower surface of the base portion and connected to the stator. The connection portion includes a solder portion arranged on a lower surface thereof to cover a portion of a lead wire extending from a coil of the stator. At least a portion of the solder portion is positioned within the hole.