A non-positive displacement type pressurizing device for pressurizing a fluid includes a rotor including a rotary blade row including a plurality of rotary blades provided at intervals in a circumferential direction; a casing that accommodates the rotor; a stationary blade row supported by the casing and including a plurality of stationary blades provided at intervals in the circumferential direction; and a plurality of heat exchanging units for cooling the fluid, wherein the heat exchanging units are configured to divide a flow path formed between stationary blades, of the plurality of stationary blades, adjacent to one another in the circumferential direction in a height direction of the stationary blades.

A centrifugal compressor includes: an impeller which is allowed to rotate around an axis; a casing in which the impeller is accommodated and a guide flow path guiding fluid to the impeller is formed; and a guide vane which is disposed in the guide flow path and is extended from a hub side wall surface of the guide flow path, which is continued to a hub side of the impeller, to a shroud side wall surface of the guide flow path to a shroud side of the impeller, wherein the guide vane is twisted forward the impeller in a rotating direction thereof as close to the shroud side wall surface from the hub side wall surface.

A heat pump includes a housing; a liquefier and an evaporator arranged inside the housing; and a compressor interposed between the evaporator and the liquefier in terms of fluid flow, the compressor having a motor, an impeller connected to the motor, and a diffusor, the diffusor having a diffusor portion extending between the motor and the impeller, the diffusor portion having at least two parts, a first part of the diffusor portion being connected to the housing and a second part of the diffusor portion being connected to the motor, wherein the first part of the diffusor portion has an opening, wherein the second part of the diffusor portion is configured to close the opening, and wherein the opening is dimensioned such that the impeller is removable from the housing through the opening.

An electric submersible pump (ESP) assembly. The ESP assembly comprises an electric motor, a centrifugal pump, and a hybrid magnetic thrust bearing, wherein the hybrid magnetic thrust bearing is disposed inside the electric motor or disposed inside the centrifugal pump.

There is provided a rotating machinery including: a rotating body R which is rotatable around an axis O and has a first facing surface P1 that widens in a plane intersecting the axis O; a stationary body S which faces the first facing surface P1 from the axial direction O, and has a second facing surface P2 forming a flow path F1 through which a fluid flows from a radially inner side toward the radially outer side between the first facing surface P1 and the second facing surface P2; and a rotation side projection portion 80 which projects from the first facing surface P1 toward the second facing surface P2, has an annular shape around the axis O, and faces the second facing surface P2 via a clearance C.

A motor includes a housing, an impeller and a diffuser in the housing, a rotor assembly and a stator assembly, the motor has an air inlet on the housing and an air outlet, the impeller is disposed adjacent to the air inlet and is connected to the rotor assembly, the diffuser is located downstream of the impeller, the stator assembly is located downstream of the diffuser, the housing includes a front housing and a rear housing connected to each other, a first air duct is enclosed among a rear inner wall of the front housing, a front inner wall of the rear housing and the diffuser and in communication with an outlet of the impeller and the air outlet, and an inner diameter size of the rear end of the rear inner wall is less than or equal to that of the front end of the front inner wall.

An air duct component includes first and second volute members arranged oppositely in a cross section perpendicular to an axis of a cross-flow impeller. An inner end of the first volute member includes a volute tongue. A cross-flow air duct formed between the first and second volute members includes a middle air duct section and an end air duct section arranged along an axial direction of the cross-flow impeller. The middle air duct section includes a middle air outlet duct located downstream of a vertical line that passes through the volute tongue and is perpendicular to the second volute member. The end air duct section includes an end air outlet duct located downstream of the vertical line. A cross-sectional area of the middle air outlet duct is larger than a cross-sectional area of the end air outlet duct.

A mixed-flow compressor includes an impeller attached to a shaft and rotatable about a shaft axis. A vaneless diffuser is located axially downstream of the impeller and has a converging portion and a diverging portion. A vaned diffuser is located axially downstream of the vaneless diffuser.

In one aspect, a pump is provided comprising a motor configured to rotate a shaft that is operably coupled to an impeller. The impeller is housed within a fluid chamber having an inlet and a discharge in fluid communication with the inlet. The fluid chamber further includes an outlet in a top portion thereof for venting air within the fluid chamber when the impeller is rotated by the motor. In other forms, a pump assembly is provided with an internal float switch integrated into the pump housing.

A water heating device equipped with a housing, a fan and a chamber arranged in the interior of the housing, and screws. The housing has first and second side plates which oppose one another in a first direction and extend from the ends of a back plate along a second direction intersecting the first direction. An opening part is provided in the housing on the side opposite the back plate in the second direction. The fan has a discharge opening, a first flow passage extending along the first direction, and a first flange. The chamber has an intake opening, a second flow passage extending along the first direction, and a second flange. The first and the second flanges are secured by screws. In a planar view, the center axis of the screws is slanted such that a head portion is closer to the opening part than the tip-end portion.