Abstract: A pump, including: inlet port and outlet ports; a cylinder block including a piston disposed in a through-bore; a swash plate engaged with the piston; a drive shaft non-rotatably connected to the drive shaft, arranged to rotate the cylinder block to draw fluid through the inlet port into the through-bore and to expel the fluid from the through-bore and through the outlet port and including an axis of rotation; an axis transverse to the axis of rotation; and an actuator including a roller screw; a nut disposed about the roller screw and in threaded contact with the roller screw; an actuator pin; and an electric motor arranged to rotate the roller screw or the nut to axially displace the actuator pin to pivot the swash plate or the cylinder block about the axis and control an amount of the fluid expelled from the through-bore.

Abstract: A gerotor assembly is provided which includes a crankshaft, an inner drive gear, an outer driven gear and a housing defining an oil groove. The inner drive gear defines a plurality of inner gear teeth. The outer driven gear defines a plurality of outer gear teeth operatively configured to engage with the inner gear teeth. The outer drive gear may define a plurality of passageways to form a hydrodynamic film between the outer driven gear and the housing. Alternatively, a high pressure oil pump may feed oil into the oil groove in order to distribute a hydrodynamic film.

Abstract: A scroll fluid machine includes a pair of a fixed scroll (15) and an orbiting scroll (16). The scroll fluid machine has an one-side stepped scroll structure in which a stepped part (16E) is provided only at a predetermined position on a tooth bottom surface (16D) of a involute spiral wrap (16B) of one of the fixed scroll (15) and the orbiting scroll (16) in a spiral direction, and a stepped part (15E) corresponding to the stepped part (16E) on the tooth bottom surface (16D) is provided only at a predetermined position on a tooth top surface (15C) of a involute spiral wrap (15B) of the other scroll in a spiral direction. The stepped part (16E) on the tooth bottom surface (16D) is provided at a position on an inner side of a spiral end position (16F) of the involute spiral wrap (16B) at intake closure by an involute angle of n radians in the spiral direction or at a position on an outer side of the inner-side position.

Abstract: A screw compressor includes: a male rotor 2 and a female rotor 3 including a rotor tooth section 21, 31 that has multiple helical teeth, the male rotor 2 and the female rotor 3 rotating in engagement with each other; a casing 4 including a main casing 41 with a bore 45 formed to accommodate the male rotor 2 and the female rotor 3, and a discharge-side casing 43 closing a discharge side of the bore 45; and a discharge passage 60 including a discharge port 61 that opens in a rotational axis direction of the male rotor 2 and the female rotor 3 on a bore side surface of the discharge-side casing 43, compressed gas flowing from the discharge port 61 circulating in the discharge passage 60. The male rotor 2 and the female rotor 3 are configured such that a discharge-side end surface 21a, 31a of the rotor tooth section 21, 31 serves as a discharge-side distal end of the male rotor 2 or the female rotor 3 in the rotational axis direction.

Abstract: A vacuum pump isolation (VPI) valve is interposed between a vacuum pump and a vacuum chamber. During normal operation of the vacuum pump, the VPI valve is open, allowing fluid communication between the vacuum pump and the vacuum chamber. When the vacuum pump becomes non-operational such as by losing power, the VPI valve closes, thereby isolating the vacuum chamber from the vacuum pump. The closing of the VPI valve is driven by the exhaust gas pressure of the vacuum pump. The VPI valve becomes exposed to the exhaust gas pressure by the opening of a pilot valve, which may occur as a result of the vacuum pump ceasing to operate. By this configuration, the VPI valve is hermetic and does not require ambient air for its operation.

Abstract: This electric compressor includes a compressor which rotates around an axis to compress a fluid, a motor which rotatably drives the compressor around the axis, and a control unit having a first component and a second component and controlling current supply to the motor during driving using the first component and the second component. An allowable current when the first component and the second component are exposed to the same temperature is set to be smaller in the second component than in the first component. The second component is disposed at a place in which cooling capability is greater than that of the first component so that allowable power of the second component at rated use is set to be greater than an allowable power of the first component.

Abstract: The float switch device for submersible pumps, comprises a float member (2) constrained to a flexible cable (3) which is electrically connected to the driving member of the pump (10). The flexible cable (3) is associated with a tilting support member (5), mounted in tilting manner outside the body of the pump (10) on a pin (6) with a substantially horizontal axis. The float member (2) is provided with a switch member (24) electrically connected to said flexible cable (3) and actuatable by actuator means (22) mobile as a function of the liquid level (L1, L2), for controlling the starting and stopping of the pump (10).

Abstract: A fluid flow machine, includes a main flow path formed by a hub and a housing, an arrangement of rotating blades in the main flow path to supply energy to the fluid, forming a rotor assembly group, an arrangement of resting blades arranged adjacent to the rotor in the main flow path, forming a stator assembly group, wherein respectively one rotor assembly group and one stator assembly group adjacent thereto form a stage of the fluid flow machine. In at least one stage, the averaged blade profile angles ?RI, ?RE of the rotor assembly group, the averaged blade profile angles ?SI, ?SE of the stator assembly group, as well as the course of the cross-sectional areas of the main flow path in a downstream direction are selected such that they fulfill a certain relationship to increase the realizable level of efficient work to be supplied.

Abstract: An improved purge gas supply that is less susceptible to the shortcomings of known systems. The disclosure aims to reduce backflow or recirculation of pumped gases into the purge supply apparatus by providing an arrangement where the purge ports on a multistage vacuum pump contains purge gas at sufficient pressure to resist the backflow, particularly when the vacuum pump is operating outside of its ultimate pressure regime. Embodiments of the purge supply apparatus described herein do not necessarily need a non-return valve to resist the unwanted pump gas back-flow.

Abstract: A ventilation assembly includes a main housing comprising a first housing wall and a second housing wall, a fan assembly disposed within the main housing, the fan assembly including a fan, and an acoustic device disposed between said first and second housing walls, the acoustic device having a first distal portion, a second distal portion and an intermediate portion extending between the first distal portion and the second distal portion, the first distal portion being relatively wider than the intermediate portion.

Abstract: The present disclosure relates to a current rectifier for being arranged on the suction area of a ventilator, with an axial initial flow side and an axial exit flow side, wherein the current rectifier comprises several crossing struts formed by at least one circumferential strut and by at least one radial strut, and a pressure measuring conduit is constructed at least in one of the struts and which comprises at least one opening facing the exit flow side, and wherein the pressure measuring conduit comprises a measuring opening for being connected to a measuring line for the connection to a pressure sensor or a pressure sensor is integrated in the pressure measuring conduit.

Abstract: The present invention provides a compressor that includes: one or more impellers that axially suck and centrifugally compress a refrigerant; a rotary shaft that is connected with the impeller and a motor for rotating the impeller; a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate; a gap sensor that senses the distance from the rotary shaft; and a controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor. The controller can sense movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and can determine whether there is abnormal wire connection on the basis of the information.

Abstract: The invention relates to a system (100) for producing energy or torque, comprising: a generator designed so as to generate energy or torque from a gas introduced at an admission of the generator; at least two compressors (101, 102) for compressing the gas at the admission of the generator; and a pipeline system (103) in which the pipes (101a, 102a, 101b, 102b, Ce, Cs) are designed such that they can be opened or closed in order to selectively place said compressors (101, 102) in series or in parallel.

Abstract: A compressor surge avoidance control system and method for a gas turbine engine includes sensing a plurality of engine inlet parameters, and receiving a fuel command value. The sensed parameters are processed to determine a surge fuel value that is representative of a fuel flow above which, for the sensed engine inlet parameters, a compressor surge will likely occur. The surge fuel value and the fuel command value are compared, and a protective action signal is generated if the fuel command value exceeds the surge fuel value.

Abstract: The present invention is directed to a load bearing direct-drive system for driving a fan in a cooling system such as a wet-cooling tower, air-cooled heat exchanger, HVAC system, hybrid cooling tower, mechanical tower or chiller system. The present invention includes a variable process control system that is based on the integration of key features and characteristics such as tower thermal performance, fan speed and airflow, motor torque, fan pitch, fan speed, fan aerodynamic properties, and pump flow. The variable process control system processes feedback signals from multiple locations in order to control a high torque, low variable speed, load bearing motor to drive the fan.

Abstract: The present disclosure relates to a fluid pump having a pump housing and an inlet wall portion positioned adjacent the pump housing. The inlet wall portion has an extending portion which extends generally parallel to an inner surface of the pump housing. A motor is housed within the pump housing. An impeller is included which is responsive to the motor. An impeller retainer is disposed adjacent the impeller and includes a radiused corner portion. An O-ring is positioned at the radiused corner portion. The O-ring exerts a force non-perpendicular to the inner surface of the pump housing to form a seal against the inner surface of the pump housing and the extending portion of the inlet wall portion.

Abstract: Embodiments of the invention are directed to a rotor for a molten metal pump and a molten metal pump including the rotor. The rotor has a main body and a top comprised of a material that is at least twice as hard as the main body. The top, among other things, may form a first portion of each rotor blade wherein the first portion directs molten metal into a pump chamber or other structure in which the rotor is mounted.

Abstract: A self-priming pump is described that has a housing, an inlet, and an outlet. A first impeller has a first pump section that is arranged in a first chamber, and a second impeller has a second pump section that is arranged in a second chamber. A shaft section is provided between the pump sections, and has a shaft end and penetrates an opening in a housing wall. To improve the net positive section head of the pump, the shaft section between a constriction and the shaft end is formed to taper from the shaft end toward the constriction, and the first impeller and shaft section between the constriction and first pump section has a smooth contour.

Abstract: A blade module and a fan using the same are provided. The blade module includes a rotating shaft and a plurality of blades. Each blade is connected to the rotating shaft and includes a blade body and an airflow guiding portion. The airflow guiding portion is connected to the blade body and has an opening.

Abstract: An impeller includes a disk formed in a disk shape about an axis, and a plurality of blades provided at intervals in a circumferential direction on one side in the axial direction of the disk. The blades define a flow path extending from one side in the axial direction toward a radial outer side and include a low-rigidity region and a high-rigidity region. The low-rigidity region has an inlet, an outlet of the extending region of the flow path, a relatively small plate thickness, and has a relatively small inclination angle with respect to the disk. The high-rigidity region adjacent to the low-rigidity region has a relatively large plate thickness, and a relatively large inclination angle with respect to the disk.

Abstract: A fan blade assembly for a gas turbine engine is provided. The fan blade assembly having: a non-linear composite airfoil; and a metal root removably attached to the non-linear composite airfoil.

Abstract: A fan includes an impeller, a drive device, and a frame structure. The driving device drives the impeller to rotate, and the frame structure accommodates the driving device. The frame structure includes a frame body, a first frame, a second frame, a base and a plurality of supports. The frame body has first engaging portions and second engaging portions, which are disposed annularly at the upper end and the lower end of the frame body, respectively. The first frame is mounted on the frame body and disposed corresponding to the first engaging portions. The second frame is mounted on the frame body and disposed corresponding to the second engaging portions. The base is disposed within the frame body and located adjacent to the second frame. The supports are disposed around the base. The material of the frame body is different from that of the first and second frames.

Abstract: An assembly for the compressor stator of a turbomachine. The assembly comprises: a shroud, in various instances an inner shroud, that is axially divided into two parts; a pocket formed in the shroud; a bearing located in the pocket; and an orientable vane pivotably mounted in the bearing about a pivot axis. The shroud comprises an axial interface separating the parts that is axially offset from the pivot axis of the orientable vane. The invention also provides a process for assembling the assembly.

Abstract: An apparatus and method for cooling a fluid within a turbine engine. A fan casing assembly for the turbine engine can include an annular fan casing with a peripheral wall having a flow path defined through the casing. A fan casing cooler includes a body to confront the peripheral wall with at least one conduit configured to carry a flow of heated fluid to convectively cool the heated fluid with a flow of air through the flow path.

Abstract: A heat exchanger for a turbine engine having a body including a first surface, a second surface opposite the first surface, and at least one fluid passage configured to carry a flow of heated fluid proximal to the second surface and where the body is arranged to transfer heat from the heated fluid to a cooling fluid passing by the second surface.

Abstract: A thermal barrier attachment seal for a gas turbine engine component includes a spine having a first surface and a second surface facing opposite the first surface. A first layer of insulation is provided on the first surface. A second layer of insulation is provided on the second surface to provide a thermal barrier seal between a first gas turbine engine component and a second gas turbine engine component. A fan section for a gas turbine engine is also disclosed.

Abstract: An attachment mechanism for a gas turbine engine component includes an elongated body having at least first and second ends. A first attachment feature is formed at the first end. A second attachment feature is formed at the second end. The first and second attachment features define attachment points configured to attach a first gas turbine engine component to a second gas turbine engine component. A fan section for a gas turbine engine and a gas turbine engine are also disclosed.

Abstract: A quick connect mounting assembly for a ceiling fan. The quick connect mounting assembly includes two releasably attachable plates that are easily interconnected to mechanically couple elements of a ceiling fan. The quick connect mounting assembly can be used to mount a ceiling fan switch housing to a ceiling fan motor assembly.

Abstract: The invention relates to a holding system for a fan comprising a wall ring and a protective grille. A holding system according to the invention for a fan with a protective grille having at least one protective-grille strut arranged in the circumferential direction and comprising a wall ring having a first end face is characterized in that the wall ring has at least one first connecting element on the first end face and the protective grille has at least one second connecting element, whereby the first connecting element can be operatively connected to the second connecting element, and the second connecting element is arranged so as to be sunk in the first end face of the wall ring.

Abstract: A vacuum pump comprises: a pump rotor rotatably driven by a motor and fastened to a shaft; a recessed portion formed at a suction-port-side end surface of the pump rotor; and a rotor balance correction member including a cover portion configured to cover the recessed portion.

Abstract: An impeller for an axial flow fan includes a plurality of blades arranged around a rotating shaft and a hub portion having a side peripheral portion surrounding the rotating shaft as viewed from a direction parallel to the rotating shaft, wherein an end portion on the rotating shaft side of each of the plurality of blades is coupled to the side peripheral portion, the plurality of blades includes a blade having a first type of shape and a blade having a second type of shape, and a thickness of the end portion on the rotating shaft side in the rotating shaft direction of the first type of shape is greater than the thickness of the end portion on the rotating shaft side in the rotating shaft direction of the second type of shape.

Abstract: An actuator includes a displaceable portion, first to fourth artificial muscles, a pressure adjuster that changes a pressure of a fluid filled in the first and second artificial muscles, an open-close valve that allows a fluid to flow into or out of the third and fourth artificial muscles, and a controller that drives the pressure adjuster and controls the open-close valve. Each of the first to fourth artificial muscles includes a coiled elastic tube. In an outer circumferential surface of the tube, grooves are helically formed about an axis of the tube. The tube is filled with a fluid. In the first artificial muscle, a direction in which the tube is coiled is opposite to a direction in which the grooves extend helically. In each of the second to fourth artificial muscles, a direction in which the tube is coiled is the same as a direction in which the grooves extend helically.

Abstract: Various implementations include a linear actuator that provides controllable depressurization of the actuator and is tunable to the specifications set by the vehicle manufacturer. The linear actuator includes a housing and a piston and piston rod that are slidably disposed within a channel extending through the housing. The piston rod defines a vent path that includes an axial cavity adjacent the proximal end of the piston rod and radial channel extending from the axial cavity to an outer peripheral surface of the piston rod. Pressurized gas entering the housing causes the piston to move axially through the housing, and a portion of the gas vents through the cavity and radial channel to the channel of the housing and then to the environment. This venting allows the actuator to be returned to its initial or stored position within a time frame and without exceeding the force set by the manufacturer.

Abstract: A system may comprise a first sensor; a second sensor; and an electronic control module. The electronic control module may be configured to determine a flow of the fluid based on information regarding the pressure from the first sensor and information regarding the temperature from the second sensor; determine a portion of the flow of the fluid that is directed to a particle counter of the machine; receive, from the particle counter, information identifying a quantity of particles in the portion of the flow of the fluid; determine a quality of the fluid based on the quantity of particles; determine whether the flow of the fluid exceeds a flow threshold or whether the quality of the fluid is less than a quality threshold; and take a remedial action when the flow of the fluid exceeds the flow threshold or the quality of the fluid is less than the quality threshold.

Abstract: A propulsion system coupled to a vehicle. The system includes a diffusing structure and a conduit portion configured to introduce to the diffusing structure through a passage a primary fluid produced by the vehicle. The passage is defined by a wall, and the diffusing structure comprises a terminal end configured to provide egress from the system for the introduced primary fluid. A constricting element is disposed adjacent the wall. An actuating apparatus is coupled to the constricting element and is configured to urge the constricting element toward the wall, thereby reducing the cross-sectional area of the passage.

Abstract: A spring clip includes a body having (a) a base, (b) a support post carried on the base, (c) a first cantilever bar carried on the support post, (d) a second cantilever bar carried on the support post and (e) at least one gusset reinforcing the first and second cantilever bars.

Abstract: A fastener assembly includes various features that work in conjunction to compress one structure against another structure thereby detachably coupling the structures together. The features may include one or more of a stud, a lever, a body, a fastener, etc. Some of these features may be pivotable, rotatable, etc. between positions to assist in coupling the structures together. Other example fastener assemblies and systems including one or more fastener assemblies are also disclosed.

Abstract: A cylindrical, internally-threaded part such as a nut or standoff that can be clinched into very-thin, sheet-metal panel even if the receiving hole is blind. The part has no integrally-formed displacer. The part is installed in an annular, blind hole by cold deforming and pushing material of the panel with a special installation tool into one or more recesses of the part. The tool has an annular cavity for receiving the fastener, an annular displacer surrounding the outer diameter of the annular cavity, and a center punch surrounded by the inner diameter of the cavity. One recess of the part may comprise an undercut in the outer periphery while another recess may comprise the groove of the internal threads. With a single stroke of the tool, panel material is simultaneously pushed into the undercut by the displacer and into the threads by the center punch to attach the part to the panel by clinching.

Abstract: The present disclosure illustrates a fixing device including a fixing assembly, a first plate and a second plate. The fixing assembly includes a sleeve, a position-limiting device, an elastic element, and a fastener. A supporting surface of the second plate is slid along a guiding incline of a stop part of the fastener, so that a stop section and the stop part of the fastener can be respectively positioned in a first fastening recess and a second fastening recess of the second plate. Later, the user just needs to push the position-limiting device to separate the fixing assembly from the second plate. Therefore, effects of reliable positioning and easy detachment can be achieved.

Abstract: A self-piercing rivet for joining a stack of at least two sheets of material. The rivet comprises a rivet head rotationally symmetrical to a central axis, and the rivet head includes a top side, a bottom side opposite the top side, and a cylindrical head exterior surface of a head diameter. The rivet head has a thickness (th) along the central axis. The rivet further comprises a rivet shank rotationally symmetrical to the central axis and including a cylindrical shank exterior surface and a cylindrical shank interior surface. The shank interior surface and the bottom side of the rivet head partially define a central shank hole that is open in an axial direction opposite to the bottom side of the rivet head. The rivet has an axial length (La) along the central axis, and the ratio between the head thickness and the axial length is between 1/7 and 1/22.

Abstract: A washer-equipped screw is provided with a screw body, a metal washer, and a rubber washer. The screw body includes a cylindrical portion between a shaft portion on which a screw groove is formed and a head portion. A hole in the metal washer is inserted through the cylindrical portion so as to be adjacent to the head portion. A hole in the rubber washer is inserted through the cylindrical portion and positioned on a shaft portion side of the metal washer. A seat surface of the head portion has an inclined surface inclined away from the metal washer toward an outer periphery thereof.

Abstract: An industrial or residential modular locking pin which captures and retains items with optional adjustable pressure prior to tightening. An elongate body carries a plurality of locking balls that are selectively urged radially outwardly to extend past an outer surface of the pin to retain a mounting aperture of a workpiece. Manual and automatically actuated configurations are disclosed.

Abstract: A screw capable of cutting and compressing dregs in an object to be drilled comprises: a tapered head with a small lower end; at least one rib being formed on and winds around the tapered area of the head. Each rib is formed with an outer wall having a first slope with respect to an outer wall of a tapered surface of the head and an inner wall with a second slope with respect to an outer wall of the tapered surface. Connection of the inner wall and outer wall is formed as a sharp knife portion. Each rib winds around the tapered surface of the head with an angle being equal to or larger than 360 degrees. By using the structure above said, dregs in screwing are compressed into the object to tighten the screw to the object to be drilled and no dregs expose out.

Abstract: Provided are wall anchors including an external plate and an inside plate partially overlapping the external plate, each of the external plate and an inside plate having a wall-facing side, the plates being rigidly connected to one another adjacent a first end of their respective wall-facing sides by a cylindrical connecting member; at least a portion of the cylindrical connecting member is configured with a round perimeter. Further provided are modifications of such wall anchors.

Abstract: A clip for attaching an attaching member to an attached member through a male connector of the attached member, includes a main body portion; a locking portion for engaging the male connector; a claw portion having elasticity to deform when inserted into a hole of the attaching member, and to return to an original form after passing through the hole; a first flange portion extending radially outwardly from an outer circumferential surface of the main body portion; a second flange portion extending radially outwardly from the outer circumferential surface of the main body portion between the first flange portion and the claw portion, for sandwiching the attaching member between the first and second flange portions; and a tool hooking portion on the another side of the main body portion, for receiving a tool to rotate in respect to the male connector.

Abstract: A washer-equipped screw is provided with a screw body, a flat washer, and a rubber washer. The screw body includes a cylindrical portion between a shaft portion on which a screw groove is formed and a head portion. A hole in the flat washer is inserted through the cylindrical portion so as to be adjacent to the head portion. A hole in the rubber washer is inserted through the cylindrical portion and positioned on a shaft portion side of the flat washer. The cylindrical portion is provided with a projection for engagingly locking the flat washer. An inner edge of the flat washer is caught by the projection, whereby the flat washer is prevented from detaching.

Abstract: A universal electronics lock has an inner cylinder and an outer cylinder. The outer cylinder slidingly fits over the inner cylinder. The outer cylinder is equipped with a lock cylinder that has an axially-movable latch. When the latch is in one position, it clears an inwardly-directed ridge defined within the inner cylinder. The lock is then in the “unlocked” position. When the latch is in a second position when rotated by a turning of a key, the latch is disposed behind a portion of the ridge and the lock is in the “locked” position. The universal electronics lock of the present invention allows rotation about a fastener, thus making the lock difficult to cut or saw through.

Abstract: A hybrid propeller shaft may include a CFRP tube layer in which high-strength CFRP or high-elasticity CFRP, the high-strength CFRP, and the high-elasticity CFRP are laminated to form at least two layers while having different wrapping angles by a prepreg wrapping process method; and a protective layer which is formed on an outermost layer of the CFRP tube layer to protect the CFRP tube layer.

Abstract: A connecting rod includes a rod having the form of a bar, a smaller end part, and a larger end part. The rod is provided with a friction generation portion at which friction is generated due to deformation of the rod.

Abstract: A dual-shaft synchronous transmission device includes a hinge structure, a driving structure, and a linkage assembly, which are linked with each other. The hinge structure includes a first shaft, a second shaft parallel to the first shaft, and a carrier fixed on the first shaft and having a track slot. The driving structure is sleeved at the first shaft and can be driven by the second shaft. A guiding slot is formed on the outer surface of the driving structure. The linkage assembly includes a linking member sleeved at the guiding slot, a first connecting rod connected to the linking member, a second connecting rod linked to the linking member. The linking member is configured to move along the guiding slot with respect to the driving structure and parallel to the first shaft for driving a column of the second connecting rod in the track slot.