Abstract: A pump assembly has at least one electronics receiving space (54; 54; 54?). The electronics receiving space (54; 54; 54?) includes at least one defined ventilation opening (40; 40; 40?). The ventilation opening (40; 40; 40?), at an outer side of the electronics receiving space (54; 54; 54?), runs out into an air duct (41; 41; 46; 46; 48, 48?) which is led along at least one condensation surface (60; 60; 60?).

Abstract: An apparatus can include a housing defining a housing interior, an air pump positioned in the housing interior, and a plurality of resilient connectors connecting the air pump to the housing with the resilient connectors in tension so as to reduce transmission of vibration from the air pump to the housing during operation of the air pump.

Abstract: A method for detecting head crashing in a linear compressor includes sampling a rolling average of a peak applied voltage and a desired peak current each time that a current controller adjusts the desired peak current. The method also includes calculating a linear regression for a predicted peak applied voltage as a function of the desired peak current, calculating the predicted peak voltage for the motor of the linear compressor with the linear regression and a current value for the desired peak current from the current controller, and establishing that a piston of the linear compressor is soft crashing when the predicted peak voltage is different than the current value for the rolling average of the peak applied voltage by more than a threshold value.

Abstract: Embodiments of a core-protecting fan module are provided, as are embodiments of a turbofan engine containing such a fan module. In an embodiment, the core-protecting fan module contains a nose member, a fan rotor downstream of the nose member, a full span stator downstream of the fan rotor, and a splitter structure downstream of the fan rotor. The fan rotor includes a plurality of fan blades, which extends from a rotor hub and which is angularly spaced about a rotational axis. Certain fundamental angular relationships are observed between the angles formed by rotational axis, the nose member, the fan rotor, and a leading edge of the splitter structure to reduce contaminant ingestion by the core flow path and to promote moisture shedding to reduce susceptibility to icing within the fan module, while further avoiding or minimizing negative impacts to other structural and functional aspects of the turbofan engine.

Abstract: Methods and systems for pumping fluid through tubing are provided. Methods include orbiting one or more first rollers at multiple angular speeds around the periphery of a substantially circular first disk having a first radius with each first roller travelling at the same angular speed as the other first rollers, orbiting second rollers at a second angular speed around a substantially circular second disk having substantially the first radius, and increasing the pressure of fluid in tubing between one first roller and one second roller by causing the one or more first rollers to orbit at a first angular speed greater than the second angular speed so the one first roller moves along and fully compresses the tubing in a first section of the first disk, and simultaneously causing the one second roller to move along and fully compress the tubing in a first section of the second disk.

Abstract: A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when system parameters are exceeded and/or fault conditions occur, can detect fault conditions, and can store fault conditions for later retrieval.

Abstract: A method for operating a linear compressor includes substituting a first observed velocity, a bounded integral of the first observed velocity, an estimated clearance, an estimated discharge pressure, and an estimated suction pressure into the mechanical dynamic model for the motor, calculating an observed acceleration for the piston with the mechanical dynamic model for the motor, calculating a second observed velocity for the piston by integrating the observed acceleration for the piston, calculating an observed position of the piston by integrating the second observed velocity for the piston, and updating an estimated clearance, an estimated discharge pressure, and an estimated suction pressure based upon an error between the first and second observed velocities and an error between the bounded integral of the first observed velocity and the observed position.

Abstract: A charging apparatus (20) for a combustion engine, having a compressor (1) which has a compressor housing (2) in which a compressor wheel (3) is arranged, the compressor wheel being mounted on one end (4) of a rotor shaft (5), and which has a compressor housing rear wall (6); and having an electric motor (7) which has a stator winding (12) which surrounds a magnet (11), which is arranged on the rotor shaft (5), on the outside. The stator winding (12) is an iron-free stator winding, and the electric motor (7) is a brushless DC motor.

Abstract: A two-stage oil-injected screw air compressor includes an integrated compression casing, and the integrated compression casing further includes a first stage compression chamber, an intermediate cooling channel, and a second stage compression chamber parallel stacked in the integrated compression casing. A straightforward oil injector aims at the intermediate cooling channel to spray lubricating oil into the intermediate cooling channel.

Abstract: An electric motor may include: a stator; a rotor; and a tubular sleeve. The stator may have a stator cavity with an axis extending in a longitudinal direction. The stator cavity may have a stator inlet for receiving a fluid and a stator outlet for discharging the fluid. The rotor may be arranged inside the stator cavity and be rotatable around the axis. The tubular sleeve may be arranged between the stator and the rotor, coaxial with the axis, and attached to the stator through attachment members. The tubular sleeve may be spaced from the stator by a first tubular gap, and from the rotor by a second tubular gap. The first tubular gap may extend along the longitudinal direction between a first gap inlet and a first gap outlet. The second tubular gap may extend along the longitudinal direction between a second gap inlet and a second gap outlet.

Abstract: Disclosed is a lubricant supply device, including at least a first housing section forming a reservoir for a lubricant, a second housing section including a feed pump for feeding the lubricant from the reservoir to a lubricant outlet and a motor driving at least the feed pump, the motor being arranged in the first housing section forming the reservoir.

Abstract: Typical liquid-cooled compressors use the effective means of reducing no-load power by repeatedly starting and stopping an electric motor according to the amount of required air, but sufficient consideration has not been given to the fact that frequent starting and stopping of large-output electric motors leads to a decline in motor reliability. In order to solve this problem, a liquid-cooled compressor for circulating a liquid inside a compressor body using a pressure difference, and equipped with a cooling channel for circulating said liquid for cooling, configured so as to have an intake valve for adjusting the air intake of the compressor body, to change the amount of air taken in through the intake valve, and as a result, to perform a low-pressure operation during no-load operation at two levels of reduced operating pressure consisting of a value no less than a minimum circulation oil supply pressure and a low value.

Abstract: An air compressor (10) has a reservoir (12), pump (14), motor (16), transmission belt (18) wound around a driving pulley (20) coupled to a motor shaft (16) and around a driven pulley (22) coupled to a pump shaft. Driven pulley spokes (28) are shaped as fan blades transmit torque and cool the pump (14). A belt guard (30) encloses the transmission belt (18), and pulleys (20, 22). The belt guard (18) has a front wall (32) with slits (34) for air drawn by the driven pulley (22), a side wall (36) enclosing the space around the transmission belt (18) and around pulleys (20, 22), and a rear wall (38) having an opening (40) receiving the pump (14). Air drawn through the slits (34) in the front wall (32) passes towards the pump (14). The guard rear wall (38) covers the pump (14) by at least 30% of its depth.

Abstract: Method for preventing condensate in the oil of an oil-injected compressor (1), characterised in that before the compressor element (2) is stopped, when the maximum pressure (pmax) in the consumer network (16) has been reached, the compressor element continues to be driven until the temperature (T) of the oil or the compressed gas is lower than a set fixed or calculated minimum value (Tmin) above which there is no or as little condensate as possible in the oil.

Abstract: A compressor assembly includes a shaft and a compressor wheel that is supported on the shaft. The compressor assembly also includes an electric motor with a stator and a rotor. The electric motor is configured to rotate the shaft and the compressor wheel. The compressor assembly additionally includes a housing assembly configured to house the stator, the rotor, and at least part of the shaft. The housing assembly includes a first member and a second member. Moreover, the compressor assembly includes a dampener disposed between the first member and the second member of the housing assembly. The dampener is configured to elastically deform to provide dampening of a force transferred between the first member and the second member of the housing assembly.

Abstract: The bilge pump safety system comprises a bilge pump, a primary switch, a monitor switch, and a control system. The primary switch is a first float switch that controls the operation of the bilge pump based on the level of liquid accumulated in the bilge that is protected by the bilge pump. The monitor switch is a second float switch installed within the bilge such that the monitor switch mimics the operation of the primary switch. By mimic is meant that: 1) when the primary switch is closed the monitor switch is closed; and, 2) when the primary switch is open the monitor switch is open. The control system simultaneously monitors the status of both the primary switch and the monitor switch. In situations where the operation of the monitor switch does not mimic the primary switch, the control system generates a message to an appropriate authority.

Abstract: An improved air compressor includes a cylinder fitted with a piston body, a main frame for mounting a motor, and an air storage container. The cylinder defines a plurality of exit holes regulated by a control mechanism including a resilient sheet having a root and a plurality branches corresponding to the exit holes. The root and branches of the resilient sheet are individually attached to a top wall of the cylinder at separate points, so that each of the branches can be individually moved by the compressed air produced in the cylinder to open or close the corresponding exit hole without affecting movements of the other branches, so that the piston body can conduct reciprocating motion more smoothly, and thus the performance of the air compressor can be increased.

Abstract: The present invention is an improved superimposed standing valve and related method of harvesting oil and gas using a conventional rod pump equipped with the improved superimposed standing valve. The present invention includes a valve cylindrical sleeve disposed between a top cylinder and a main standing valve such that the valve cylindrical sleeve can slide along the top cylinder a fixed valve stroke. A plurality of openings are sealed and unsealed by the movement of the valve cylindrical sleeve. The present invention isolates the pump from the head pressure of the oil and gas inside of the tubing thereby enabling the standing valve of the pump to remain open on both the upstroke and the downstroke. As a result, the improved superimposed standing valve increases pump efficiency and reduces the risk of gas locking. Its cylindrical sealing surfaces also prevent solid formation particles from gravitating downward into the pump chamber.

Abstract: A method for generating a flow of fluid, implemented in a device including a membrane (2) provided with at least one hole (20) and elements (4) generating back-and-forth movements, wherein a flow is generated through the membrane by actuating the membrane, at least in the region of the at least one hole (20), according to a mode of deformation of the at least one hole, causing the at least one hole to open and close and disturbing the fluid in order to generate the flow. The device suitable for implementing the method is also described.

Abstract: A turbine blade includes an airfoil that extends radially between a root end and a tip end, a platform coupled to the root end, and a shank that extends radially inwardly from the platform. The shank includes a cover plate. The cover plate includes an outer surface, an opposite inner surface, and a contoured face that at least partially defines a damper pin slot. The contoured face extends from the outer surface to a first blend edge. The cover plate also includes a blended surface that extends from the first blend edge to a second blend edge. The second blend edge intersects with the inner surface.