Abstract: A centrifugal blower apparatus includes a scroll-shaped housing with first and second air inlets which open to a blower chamber that is in fluid communication with an air outlet. The blower includes a motor to drive impellers, wherein the motor is secured to a frame coupled within the housing in a manner to substantially enhance aerodynamic performance of the blower.

Abstract: A reciprocating compressor with a gas bearing is configured to support a portion between a cylinder and a piston by the gas bearing and induce a resonating motion of the piston by the use of compression coil springs. Therefore, a proper resonating motion of a vibrating body can be induced by the use of the gas bearing, without using plate springs, and accordingly manufacturing costs and the number of assembly processes can be reduced and the installation direction of the compressor can be freely designed.

Abstract: A reciprocating compressor is provided. Bearing holes of a fluid bearing of the compressor may be positioned correspond to a full reciprocating region of a piston, to reduce/eliminate frictional loss and/or abrasion between a cylinder and the piston. The bearing holes may be concentrated at certain regions of the cylinder to stably support the piston through a full reciprocating range. Compression coil springs may maintain concentric alignment of the cylinder and the piston. Gas through holes may be radially formed at the piston to lower a pressure of a bearing space and allow refrigerant to be smoothly introduced into the bearing space through a gas pocket. A casing of the compressor may include an outer shell and an inner shell to attenuate vibration generated due to friction generated by operation of the reciprocating compressor.

Abstract: Disclosed is a system for allocating torque, supplied in one embodiment by an engine, to multiple variable and fixed displacement pumps coupled together in a series by coupling elements interspersed between the pumps. A controller is included which monitors the torque applied to each coupling element. The controller automatically varies displacement in one or more of the variable displacement pumps to prioritize and allocate torque to optimize available torque while keeping the torque applied to each coupling element within the torque limit for that particular coupling element.

Abstract: A wind turbine comprises a wind-driven rotor for converting wind energy to a mechanical driving force, a power converter for converting the driving force to exploitable power, and a drive train for rotatably transmitting the driving force from the wind-driven rotor to the power converter. The drive train includes: at least one rotatable driving element configured to provide at least one torsional resonance frequency in the drive train; a first detuner having at least one first mass element with a first mass inertia and at least one first elastic element with first elastic properties; and a second detuner having at least one second mass element with a second mass inertia and at least one second elastic element with second elastic properties. The first and second mass elements and first and second elastic elements are arranged to rotate during operation of the wind turbine. The torsional resonance frequency is influenced by the first and second mass inertias and the first and second first elastic properties.

Abstract: An automatic-transmission hydraulic pressure supply system includes a low-pressure hydraulic pump supplying low hydraulic pressure to a first low-pressure line, a low-pressure regulator valve recirculating through a first recirculation line a portion of the hydraulic pressure supplied through the first low-pressure line to regulate the hydraulic pressure of the first low-pressure line, and supplying the regulated hydraulic pressure to a low pressure portion through a second low-pressure line, a high-pressure hydraulic pump receiving a portion of the hydraulic pressure of the first low-pressure line, increasing and supplying the increased hydraulic pressure to a high pressure portion through a high-pressure line, and a high-pressure regulator valve recirculating a portion of the hydraulic pressure supplied through the high-pressure line through second and/or third recirculation lines, and supplying the regulated hydraulic pressure to the high pressure portion.

Abstract: A motor-driven compressor includes a compression unit, an electric motor, a housing, a cover, wherein the cover includes a main body and a connector coupler, and the cover and the housing define an accommodating chamber, a motor driving circuit that is accommodated in the accommodating chamber and includes a circuit board, and a metal terminal held in the connector coupler, wherein the metal terminal includes first and second end portions. The cover has a shield including a first shield portion, which blocks electromagnetic noise and forms at least part of the connector coupler, and a second shield portion, which blocks electromagnetic noise and forms at least part of the main body. The first and second shield portions are coupled to each other. The second shield portion includes an insertion hole into which one of the first and second end portions of the metal terminal is insertable.

Abstract: A device for detecting breaks in a diaphragm of a hydraulically-actuated pump includes a body (21) in which a first chamber (22) is formed, a duct (23) connecting the first chamber to a second end of the body, a check valve (24) arranged in the duct to pass fluid from the second end towards the first chamber, a piston (26) having a first portion (27) that co-operates in sealed manner with the first chamber and that has a hole passing therethrough of diameter greater than the diameter of a free ball (25) of the check valve, and a second portion (33) that is suitable for co-operating in sealed manner with the first portion to form a closed end of the piston. A method of mounting such a device on a pump, and a pump fitted with such a device, are also provided.

Abstract: One exemplary embodiment of this disclosure relates to a centrifugal refrigerant compressor system. The system includes a condenser, an evaporator, and an economizer between the condenser and the evaporator. The system further includes a centrifugal compressor having a first impeller and a second impeller downstream of the first impeller. The compressor includes at least one port. Fluid from a recirculation flow path and an economizer flow path is introduced into a main flow path of the compressor by way of the at least one port.

Abstract: A fan unit for a heat exchanger, has a plate-like support structure or shroud with a main opening defining an air passage for ventilation of the heat exchanger. An electric drive motor is fixed to the support structure or shroud. An impeller is arranged inside the main opening and driven by the drive motor. A spray protection screen associated with a side of the motor remote from the impeller is fixed to the support structure or shroud in such a way that, during use, it is substantially vertical and defines an inlet opening for an air flow for cooling the motor. The spray protection screen has an outwardly projecting deviating formation designed to deflect outside of the inlet opening, water which may flow over the outer surface of the screen during operation of the fan unit.

Abstract: A reciprocating motor and reciprocating compressor having a reciprocating motor are provided. Making of the reciprocating motor is made easier, and therefore, manufacturing costs are reduced by configuring the stator such that an inner stator positioned inside a mover and an outer stator positioned outside of the mover are integrally formed, or by making inner and outer circumferential surfaces of the stator have a same curvature. Magnetic leakage is prevented as no gap is formed between the inner and outer stators, thereby improving performance of the reciprocating motor. The use of magnets may be reduced by omitting magnets between stator blocks, and therefore, manufacturing costs may be reduced, when compared to efficiency of the reciprocating motor.

Abstract: A connection plate for a hydrostatic piston machine includes two connection openings on opposite lateral surfaces of the connection plate. The connection openings are arranged at an offset from a main axis of the connection plate on a common side. Two slotted recesses are formed from an inner face of the connection plate. The slotted recesses are each connected in the area of the first end section of the slotted recesses to one of the connection openings in order to connect the piston machine to a hydraulic circuit. A valve cartridge is inserted in an installation bore of the connection plate. The installation bore is formed opposite the plate axis in the connection plate with respect to the connection openings and extends approximately parallel to axes of the connection openings. The valve cartridge is hydraulically connected to one of the slots.

Abstract: A disc pump valve includes an elliptical pump base having at least one aperture extending through the base. The base comprises a first end wall and a sealing surface. The pump includes an isolator overlying the base and having an isolator valve aperture extending through the isolator at or near the periphery of the isolator and partially overlying a cavity formed by the base to form an outlet. In addition, the disc pump includes a valve flap disposed between the pump base and the isolator. The flap has apertures arranged about its periphery, beyond the periphery of the cavity but underlying an isolator valve aperture. The flap seals against the sealing surface to close the pump outlet and prevent fluid from flowing from the outlet into the cavity and flexes away from the sealing surface to allow fluid to pass from the cavity through the pump outlet.

Abstract: A pump housing of a gear pump and a stator of an electric motor are fastened to each other with bolts via a front insulator. Dowel pins are inserted in respective through-holes that are formed in the front insulator at equal intervals in a circumferential direction so as to be located next to insertion holes for the bolts. Respective end portions of each dowel pin are in contact with a bottom face of the pump housing and a pump-side surface of the stator core, and the pump housing and the front insulator are fixed to each other such that a slight gap is formed between the pump housing and the front insulator.

Abstract: A hydraulic pressure supply system may include a low-pressure hydraulic pump receiving the oil stored in the oil pan and generating the low hydraulic pressure, a low-pressure regulator valve controlling the low hydraulic pressure of the first low-pressure line, a reducing valve fluid-connected to the low-pressure regulator valve and supplying a hydraulic pressure to the low pressure portion, a high-pressure hydraulic pump increasing the low hydraulic pressure supplied from the low-pressure hydraulic pump, a switch valve disposed between the first low-pressure line and the high-pressure line, and selectively connecting the first low-pressure line and the high-pressure line, a high-pressure regulator valve controlling the increased hydraulic pressure supplied from the high-pressure hydraulic pump and the low hydraulic pressure selectively supplied from the low-pressure hydraulic pump through the switch valve, and supplying the stable high hydraulic pressure to the high pressure portion.

Abstract: A turbomachine system and method, with the system including a slug detector coupled to a main line to detect a slug flow in a multiphase fluid in the main line. The system also includes a compressor fluidly coupled to the main line and disposed downstream of the slug detector, and a bypass line fluidly coupled to the main line upstream of the compressor and downstream of the compressor. The system further includes at least an upstream control valve fluidly coupled to the main line upstream of the compressor and communicably coupled to the slug detector. The upstream control valve is configured to actuate between a normal position, in which the upstream control valve directs fluid to the compressor, and a bypass position, in which the upstream control valve directs fluid to the bypass line, according to when the slug detector detects a slug flow.

Abstract: A hydraulic pressure supply system may generate low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and may supply the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion in which the hydraulic pressure supply system may include: a low-pressure hydraulic pump; a first switch valve; a low-pressure regulator valve controlling the hydraulic pressure supplied from the first switch valve and supplying the hydraulic pressure to the low pressure portion; a high-pressure hydraulic pump discharging the raised hydraulic pressure to a high-pressure line; a second switch valve disposed between the first low-pressure line and the high-pressure line, a high-pressure regulator valve controlling the hydraulic pressure supplied from the high-pressure hydraulic pump and supplying the stable high hydraulic pressure to the high pressure portion; a bypass line bypassing the first switch valve.

Abstract: A hydraulic pressure supply may include a low pressure portion, a high pressure portion, a low-pressure hydraulic pump receiving the oil stored in the oil pan and discharging the low hydraulic pressure to a first low-pressure line fluid-connected to the low-pressure hydraulic pump, a switch valve fluid-connected to the first low-pressure line, and selectively supplying the low hydraulic pressure to the low pressure portion or the high pressure portion, a low-pressure regulator valve connected to the switch valve, a high-pressure hydraulic pump fluid-connected to the low-pressure hydraulic pump through the first low-pressure line, a high-pressure regulator valve fluid-connected to the high pressure line and controlling the high hydraulic pressure supplied from the high-pressure hydraulic pump and the low hydraulic pressure supplied from the low-pressure hydraulic pump to be stable high hydraulic pressure, a second input line connecting the oil pan to the first low-pressure line.

Abstract: A vertical takeoff and landing aircraft includes rotors that provide vertical and horizontal thrust. During forward motion, the vertical lift system is inactive. A lift fan mechanism positions the fan blades of the aircraft in a collapsed configuration when the vertical lift system is inactive and positions the fan blades of the aircraft in a deployed configuration when the vertical lift system is active.

Abstract: A motor-driven compressor to be mounted to an attachment section of a vehicle includes a fluid compression unit, an electric drive unit for the compression unit and a case. The case has a main body formed from a resin and covering at least the compression unit, and a mounting portion that is provided integrally with the main body and configured to be mounted to the attachment section. The mounting portion has a tubular body provided integrally with the main body and a fastening member inserted into the tubular body for mounting the tubular body to the attachment section. The main body is interposed between the compression unit and the tubular body.