Abstract: This electric compressor includes a compressor which rotates to compress a fluid, a motor which rotatably drives the compressor, and a control unit which controls current supply to the motor using first and second components. An allowable current for first and second components 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 greater than allowable power of the first component. This electric compressor includes a temperature sensor which detects the temperature of the first component and a calculation unit which outputs an alarm signal when the detected temperature and a current flowing in the first component satisfy a predetermined condition.

Abstract: A vehicle seat in accordance with the present disclosure includes a seat bottom, a seat back, and an occupant comfort system. The occupant comfort system includes a pneumatic pump and a pneumatic bladder. The pneumatic pump provides a stream of pressurized air to the pneumatic bladder to inflate the pneumatic bladder.

Abstract: Valve assembly for a pump, the valve assembly including: a valve seat having a valve face (60), a flexible valve having a sealing portion for abutting the valve face (60), and at least a fluid pathway (66, 68, 70) from an interior of the valve seat to an exterior of the valve seat that serves as a leak flow path for fluid when the valve is in the closed position to reduce pressure build up on the valve. In this way, the vacuum inside the pump can be released when the value is in the closed position and the pump is stopped, thereby allowing the pump to start/restart due to reduced pressure build up on a side of the valve abutting the valve face. A pump or compressor including such a valve assembly is also disclosed.

Abstract: The invention provides the submersible pumping apparatus comprising, united in a single housing, a filtration system for the inlet of a wellbore fluid, a gravity gas separation system, a head for attachment to a tubing, a double action pump, a linear driven electric motor, a hydro-protector, and a telemetry system. The linear electric motor comprises a fixed part, a stator with a dielectric liquid which surrounds the stator, and a movable part being a slider, comprising several sections spaced-apart from the central axis of a stator housing along a diameter, and is configured to reciprocate along a longitudinal axis. The double action pump comprises two plungers; movable parts of the pump, plungers, are mechanically connected with the slider sections; fixed parts of the pump, cylinders, are arranged as follows: one cylinder is in the central part of the motor stator, and the second cylinder is in the inner part of the hydro-protector.

Abstract: A method for operating a pneumatic system of a vehicle is disclosed. The pneumatic system comprises an electronically and/or pneumatically controlled compressor which supplies compressed air during a normal mode and which is switched off or idles when not supplying compressed air. In the method, an ambient temperature (T_Umg) around the pneumatic system is continuously sensed and compared with a predefined target temperature (T_Ziel), a freezing risk is detected when the ambient temperature (T_Umg) reaches or drops below the target temperature (T_Ziel), and when a freezing risk has been detected, a cold mode is activated in which the compressor delivers compressed air also outside delivery phases of the normal mode, and additional compressed air is supplied to pneumatic system components that risk freezing. An additional ON time (ED_zus) of the compressor in the cold mode is variably controlled.

Abstract: An electric motor assembly includes a stator assembly and a rotor assembly positioned adjacent the stator assembly to define an axial gap therebetween. The stator assembly is configured to induce a first axial force on the rotor assembly. The electric motor assembly also includes an impeller directly coupled to the rotor assembly opposite the stator assembly such that the rotor assembly and the impeller are configured to rotate about an axis. A fluid channeled by the impeller induces a second axial force on the impeller. The electric motor assembly further includes a hydrodynamic bearing assembly including a rotating member coupled to the rotor assembly and stationary member at least partially circumscribing the rotating member such that rotation of the rotating member with respect to the stationary member is configured to induce a third axial force on the rotor assembly.

Abstract: A method for pumping a fluid includes providing a peristaltic pump including a contact wall, an opposing, movable compression element, and a flexible tube interposed between the contact wall and the compression element in a compressing region. The flexible tube has a tube lengthwise axis and a through passage. The flexible tube is displaceable relative to the compressing region between a first position and a second position different from the first position. The method includes: with the flexible tube in the first position, compressing the flexible tube between the compression element and the contact wall to thereby force the fluid through the through passage; thereafter displacing the flexible tube into the second position from the first position; and thereafter, with the flexible tube in the second position, compressing the flexible tube between the compression element and the contact wall to thereby force the fluid through the through passage.

Abstract: The present disclosure is directed to a nozzle for a turbomachine. The nozzle includes an inner side wall, an outer side wall radially spaced apart from the inner side wall, and an airfoil extending radially from the inner side wall to the outer side wall. The airfoil defines a cavity that extends radially through the nozzle. The cavity is at least partially defined by a cavity wall. The cavity wall at least partially defines a pocket in fluid communication with the cavity. A cooling passage is defined by one of the inner side wall or the outer side wall. The cooling passage is in fluid communication with the cavity via the pocket.

Abstract: An oil-injected screw air compressor includes a first stage compression chamber, an air buffering chamber coupled to the first stage compression chamber, a second stage compression chamber coupled to the air buffering chamber, a first oil cooling device for cooling lubricating oil for the first stage compression chamber and the air buffering chamber, a second oil cooling device for cooling lubricating oil for the second stage compression chamber and the first oil cooling device, a plurality sensors respectively located at the first stage compression chamber outlet and the second stage compression chamber outlet, and a control unit respectively and dynamically controlling the first oil cooling device and the second oil cooling device according to preset pressure and temperature data measured by the sensors or pressure and temperature data measured by the sensors, and temperature data and humidity data of an environment.

Abstract: A motor-operated compressor includes a casing having an inner space in which a driving motor, an orbiting scroll and a fixed scroll are accommodated, and a controller provided outside the casing. The casing includes an intake hole formed at a side adjacent to the controller and an exhaust hole formed at a side adjacent to the fixed scroll on the basis of the driving motor. The casing includes a communication passage formed between the casing and a stator of the driving motor, such that a refrigerant introduced into the inner space through the intake hole is introduced into the suction chamber through the driving motor. A back pressure space supporting the orbiting scroll is sealed by oil. The stator has teeth on its inner circumferential surface and protrusions on its outer circumferential surface, each protrusion being located within a width range of each tooth.

Abstract: A pulsation dampening apparatus for providing a selectively variable orifice size for a reciprocating compressor system includes a rotatable conical cage and a fixed conical cage, the conical cages being aligned along a central axis to form a central cylindrical port. The conical cages each include at least one window or port and have mating contours allowing the conical cages to rotatably slide over one another, allowing their respective ports to be selectively aligned in any configuration to create any desired effective orifice size. In one embodiment, each of the conical cages include a plurality of ports which can be selectively aligned, the relative alignment of the ports determining the effective orifice size of the pulsation dampening apparatus.

Abstract: An improved air compressor includes a cylinder that is fitted with a piston body and defines at its top wall a plurality of exit holes which are approximately equal in diameter and can be regulated by a resilient sheet having a plurality of branches to enable the cylinder to communicate with an air storage container. The exit holes are normally sealed by the branches of the resilient sheet with the assistance of compression springs when the air compressor is not in operation. The exit holes allow the compressed air produced in the cylinder to quickly enter the air storage container, so that the piston body can conduct reciprocating motion more smoothly and thus the performance of the air compressor can be increased.

Abstract: A compressor control system includes: a compressor; an inlet guide vane (IGV) arranged at an inlet of the compressor, and configured to adjust opening of the inlet based on a supplementary surge control signal or a performance control signal; an anti-surge valve (ASV) connected to an outlet of the compressor, and configured to prevent a surge based on a surge control signal; and a controller configured to generate the surge control signal for controlling the ASV when an operating point enters a surge control range, generate the supplementary surge control signal for controlling the IGV in an anti-surge mode when the operating point enters a supplementary surge control range set between the surge control range and a surge range, and generate the performance control signal for controlling the IGV in a performance mode until the operating point enters the surge control range.

Abstract: Turn caps for airfoils of gas turbine engines having exterior side walls, an exterior top wall extending between the exterior side walls, a first turn cap divider extending from the exterior top wall and positioned between the exterior side walls and defining a first turning feature between the first turn cap divider and the exterior side walls, the first turning feature comprising a first suction-side turn passage and a first pressure-side turn passage wherein the first turn cap divider fluidly separates the first pressure-side turn passage from the first suction-side turn passage within the turn cap, and a merging chamber is formed in the turn cap wherein fluid flows passing through the first suction side turn passage and the first pressure side turn passage are merged at the merging chamber.

Abstract: An evacuator for supplying vacuum to a device in a boosted engine air system is disclosed. The evacuator defines a body comprising a converging motive section, a diverging discharge section, at least one suction port, and a Venturi gap located between an outlet end of the converging motive section and an inlet end of the diverging discharge section. A lineal distance is measured between the outlet end and the inlet end. The lineal distance is decreased in length if higher suction vacuum at a specific set of operating conditions is required and the lineal distances is increased in length if higher suction flow rate at the specific set of operating conditions is required.

Abstract: A reciprocating pump includes a housing, a rod, and a bellows. The housing surrounds a bellows chamber and a displacement chamber. A portion of the rod extends through the opening in the endcap and into the bellows chamber of the housing. A cross-section of the rod includes a lobed shape. The bellows is connected to the housing and to the rod such that the bellows surrounds a portion of the rod.

Abstract: A coupling assembly, including a first component and a second component overlapping in a join region; a joining device allowing the first and second components to rest against each other clampingly and region; the joining device including a clamp resting on the first component and the second component and having a bolt connection adapted for securing the clamp to the first and second component. The first and second components are manufactured from a ceramic matrix composite; the first component having a holding portion including a front side facing the clamp, a rear side facing away from the clamp, and a receiving opening; and the bolt connection having a bolt portion that extends through the receiving opening and, at the end thereof facing away from the clamp, having a bracing portion angled relative to the longitudinal axis of the bolt portion and that rests against the rear side.

Abstract: An electric pump can have a stator with a stator core defining a plurality of poles, a coil of electrically conductive material extending around each respective one of the plurality of poles, and a stator-cooling chamber, as well as an impeller coupled to a rotor. A first region can be at least partially occupied by the impeller and fluidicly coupled with the stator-cooling chamber to convey a working fluid from the first region into the stator-cooling chamber. The stator-cooling chamber can be configured to facilitate heat transfer from the stator core and/or the coils to the working fluid in the stator-cooling chamber. Cooling systems can incorporate such a pump. Related methods also are disclosed.

Abstract: A hand air pump with air accumulation function includes a control valve with a valve block and a control lever switchable between a first operation mode where the plunger assembly is allowed to pump compressed air into an air accumulation tank for accumulation, and a second operation mode where the air accumulation tank is opened to discharge the accumulated compressed air for inflating an attached tire and the plunger assembly is allowed to pump compressed air directly into the attached tire.

Abstract: A bellows pump device includes first and second bellows mounted on a pump head so as to be expandable/contractible independently of each other and configured to suck a fluid from a suction passage thereinto by expansion thereof and discharge the fluid therefrom to a discharge passage by contraction thereof. First and second air cylinder portions are configured to respectively cause the first and second bellows to perform expansion/contraction operation. First and second detection devices are configured to detect expanded/contracted states of the first and second bellows, respectively. A control unit is configured to control drive of the first and second air cylinder portions on the basis of each of detection signals of the first and second detection devices such that, before one bellows comes into a most contracted state, the other bellows is caused to contract from a most expanded state.