Abstract: Various embodiments are provided herein for a system and method for air compression. In at least some embodiments provided herein, there is provided a compressor device having an annular chamber, at least one inlet port, at least one blade, at least one dynamic partition wall and at least one outlet, wherein when the at least one partition wall is in a closed position, the at least one blade approaching the at least one partition wall causes the air to compress and wherein when the at least one partition wall is in the open position, at least one blade moves from a first side to a second side of the at least one partition wall. The compressor device may contain a gearbox train configured to move the at least one partition wall from the closed position to the open position when the at least one blade is within a predetermined distance.

Abstract: A turbomachine engine can include a fan assembly, a pitch change mechanism, a vane assembly, a core engine, a gearbox, and a gearbox efficiency rating. The fan assembly can include a plurality of fan blades. The pitch change mechanism can be coupled to the fan assembly. The vane assembly can include a plurality of vanes. The core engine can include one or more compressor sections and one or more turbine sections. The gearbox includes an input and an output. The input is coupled to the one or more turbine sections of the core engine and comprises a first rotational speed, the output is coupled to the fan assembly and has a second rotational speed, and a gear ratio of the first rotational speed to the second rotational speed is within a range of 4.1-14.0. The gearbox efficiency rating is 0.10-1.8.

Abstract: A fan with airfoil blades is provided for a regenerative air vacuum street sweeper. The blades are formed using cut and pressed upper and lower panels which are welded at a forward edge to a rod to form the airfoil leading edge and welded at the rear edges to form the airfoil trailing edge. Pins extend laterally outwardly from the rod for mounting each blade in corresponding holes in the front and rear plates of the fan housing. The side edges of the blade are welded to the plates at a 9-11° angle of attack. The airfoil blades allow for reduced size, horse power, noise, and manufacturing and shipping costs.

Abstract: An inertial particle separator (IPS) duct assembly is disclosed having a duct having an inlet section extending downstream from an intake flow opening for receiving airflow to a junction, a scavenge flow section and a core flow section, the scavenge flow section and the core flow section splitting from the inlet section at the junction, the scavenge flow section having a scavenge flow outlet downstream of the junction, the core flow section having a core flow outlet downstream of the junction and fluidly connectable to the air intake of an engine core. A splitter cartridge is removably mounted at the junction, the splitter cartridge including a splitter body extending between a duct wall of the scavenge flow section and a duct wall of the core flow section.

Abstract: A silencing device and a compressor having the silencing device are disclosed. The silencing device has a housing. An air inlet and an air outlet are provided to the housing. An air flow channel is provided in the housing for allowing air communication between the air inlet and the air outlet. An oil hole is provided in the housing for discharging oil from the housing. An oil guide part is arranged on the outside of the housing and at a position downstream of the oil hole in the moving direction of the oil, such that the oil drips from the housing after flowing from the oil hole to the oil guide part.

Abstract: A stator structure and a motor are provided, including an air duct housing. A fixing part is coaxially disposed in the air duct housing and configured to install a motor assembly, connecting components disposed between the air duct housing and the fixing part fix a relative position between the air duct housing and the fixing part, a position of a mounting inlet of the fixing part is on the same side as a position of a fan blade assembly of the air duct housing, an end of the fixing part far away from the mounting inlet is provided with a mounting end cover. By setting the mounting inlet of the fixing part and the fan blade assembly of the air duct housing on the same side, processing of surfaces A, B and C can be completed by one processing without secondary processing, therefore ensuring coaxiality and accuracy of the processing.

Abstract: A vibration attenuator has a first spinner configured for rotation about a first axis and a first mass coupled to the first spinner for rotation therewith, the first mass being movable radially relative to the first axis between an inner position and an outer position. An actuator is coupled to the first mass for selectively controlling a radial location of the first mass relative to the axis, and a first motor is configured for driving the first spinner in rotation about the first axis.

Abstract: Some embodiments of the present disclosure provide a shaft sleeve assembly, a blade mounting structure and an air conditioner. The shaft sleeve assembly is configured to connect a blade shaft and a motor shaft and includes: a blade shaft sleeve a first end of the blade shaft sleeve being configured to be connected with the blade shaft; and a motor shaft sleeve, a first end of the motor shaft sleeve being configured with be connected to the motor shaft and a second end of the motor shaft sleeve being connected with a second end of the blade shaft sleeve and at least one of the blade shaft sleeve and the motor shaft sleeve is an injection molded member.

Abstract: An impeller for a disc pump has a drive disc with a connector for joining to a shaft of the disc pump, a driven disc affixed to the drive disc so as to define a space therebetween, and a plurality of wing vanes formed in the face of at least one of the drive disc and the driven disc. The drive disc has a face facing a face of the driven disc. The drive disc extends in generally parallel planar relationship to the driven disc. The plurality of wing vanes radiate across the face toward an outer diameter of one of the drive disc and the driven disc. Each of the plurality of wing vanes has a portion extending outwardly beyond the outer diameter of the drive disc and the driven disc.

Abstract: A method for determining a set of optimal operating parameters for a pumping plant that pumps a fluid medium by a set of multiple pumps connected in parallel includes: determining, from the set of pumps, a set of possible scenarios, each scenario indicating, for each pump in the set, whether the pump is running or not running; optimizing, for each scenario, a set of operating parameters including operating parameters of the pumps that are running according to the respective scenario so that all running pumps together bring a given input mass flow of the medium from a given input pressure to a given output pressure while minimizing a total power consumption of all running pumps, and assigning the found minimum power consumption and the corresponding optimal operating parameters to the respective scenario; and determining, from the set of scenarios, the scenario with a lowest power consumption.

Abstract: A component for a gas turbine engine includes, among other things, an airfoil that includes a pressure sidewall and a suction sidewall that meet together at both a leading edge and a trailing edge, the airfoil extending radially from a platform to a tip, a tip pocket formed in the tip and terminating prior to the trailing edge, and one or more heat transfer augmentation devices formed in the tip pocket.

Abstract: A method of assembling a blade outer air seal assembly includes engaging a first blade outer air seal with a first attachment surface on a first attachment body. The first blade outer air seal includes a first attachment body passage for accepting the first attachment body. A second blade outer air seal is engaged with a second attachment surface on the first attachment body. The second blade outer air seal includes a second attachment body passage for accepting the first attachment body. Rotation is prevented of the first attachment body relative to the first blade outer air seal with a first post engaging the first blade outer air seal. Rotation is prevented of the first attachment body relative to the second blade outer air seal with a second post engaging the second blade outer air seal.

Abstract: Disclosed examples include a retrofit fan frame assembly, comprising: a leading edge adjustment component coupleable to an airfoil, the leading edge adjustment component of variable chord length, the variable chord length to increase and then decrease along a radial length from a hub end of the airfoil to an opposite tip end of the airfoil; and an attachment mechanism configured to couple the leading edge adjustment component to a leading edge of the airfoil.

Abstract: A cooling fan creating a more stable airflow for heat-removing purposes, with reduced noise of operation, comprises a rotor hub and preferably an odd number of blades mounted on periphery of the rotor hub in unequal intervals. Adjacent blades are configured with different shapes, reducing the noise generated during operation without affecting the cooling effect.

Abstract: The disclosed technology generally relates to a compressor housing, comprising a first portion configured to house a compressor motor of a centrifugal compressor, a second portion configured to house an inlet housing of the centrifugal compressor, where the inlet housing is configured to receive refrigerant into an impeller assembly of the centrifugal compressor, and at least one refrigerant accumulator upstream of the second portion, the at least one refrigerant accumulator configured to accumulate liquid refrigerant.

Abstract: An impeller is provided, including a metal housing, a shaft, and a plastic member. The metal housing has a shaft mounting hole. The inner surface of the shaft mounting hole includes three or more contact points, and the contact points are closer to the shaft than other portions of the inner surface of the shaft mounting hole. The shaft passes through the shaft mounting hole and is affixed by the contact points. The metal housing divides the shaft into an upper section, a middle section, and a lower section. The plastic member passes through the shaft mounting hole and is in contact with the middle section.

Abstract: The utility model relates to a household submersible pump, which comprises a pump base, a pump body and a signal light assembly, wherein the pump base is provided with a water outlet, a water inlet and a first filter screen; the pump body has an inner housing having an inner electrical chamber equipped with a circuit board therein and a front mount, and an outer housing having a front guiding seat; the signal light assembly comprises a signal light connected to the circuit board and a light guiding column with a waterproof seal ring embedded therein; the light guiding column is able to be rotated from a first state in which it can be inserted into the front mount through the front guiding seat to a second state in which it is locked in the front mount, and is set to be able to export the light emitted from the signal light to the outside of the outer housing. The utility model not only achieves an outward propagation of light to indicate the status of the pump but also achieves an IPX8 level waterproof.

Abstract: A thrust box with improved cooling comprises a case having an interior, a first passageway and an opposing second passageway. A shaft passes through the case and the first and second passageway. A thrust runner is secured to the shaft and a pump ring is attached to the thrust runner. Advantageously, the pump ring facilitates oil rate circulation and cooling among other benefits.

Abstract: A frequency tuning rib is provided on an impeller shroud to alter a natural frequency of the shroud so as to avoid coincidence with the aerodynamic excitation frequencies to which the shroud is exposed during engine operation.

Abstract: A centrifugal or diagonal impeller has impeller blades (4) that are curved in the circumferential direction about an axis of rotation and are formed from a single-layer sheet metal. Each blade (4) has a suction side (11) and a pressure side (12) as well as a blade leading edge (5) and a blade trailing edge (6). At least the blade leading edge (5) of the impeller blades (4) adjacent to their suction side (11) have a geometric edge modification in the form of a rounding (7) over a predetermined partial length of a blade thickness (SD) of the impeller blades (4).