A drain pump for an appliance includes a single, self-starting, single-phase synchronous motor and a pump chamber having an inlet and first and second outlets. The first outlet is a drain outlet and the second outlet is a recirculation outlet. An impeller is disposed within the pump chamber and is selectively and bi-directionally driven by the single-phase synchronous motor. Rotation of the impeller in a first direction directs fluid from the inlet toward the drain outlet and away from the recirculation outlet. Rotation of the impeller in the second direction directs the fluid from the inlet toward the recirculation outlet and away from the drain outlet.

A shaft coupling for connecting a first shaft to a second shaft includes a first hub that has a shaft sleeve that fits over a portion of the first shaft. The first hub also includes a connection flange connected to the shaft sleeve. The shaft coupling further includes a compression fitting that fits over the shaft sleeve to apply a compressive force to the shaft sleeve and first shaft. The shaft coupling further includes a second hub that is connected to the second shaft and to the first hub.

A frame for supporting a horizontal pumping system includes a base assembly and a motor support assembly connected to the base assembly. The motor support assembly includes an upper support plate having a top and a bottom, a first lower support plate connected to the upper support plate, and a second lower support plate connected to the upper support plate. The first and second lower support plates are connected to the upper plate with bolted and welded connections.

In various embodiments, a catheter pump is disclosed herein. The catheter pump can include an elongated catheter body having a distal portion including an expandable cannula having an inlet and an outlet. The expandable cannula can have a delivery profile and an operational profile larger than the delivery profile. An impeller assembly can include an impeller shaft, and an impeller body can include one or more blades. The impeller blades can draw blood into the cannula when rotated. Further, an expandable support can have a mounting portion disposed on the impeller shaft distal of the impeller body and a cannula contact portion for reducing a change in tip gap due to bending of the cannula. The cannula contact portion can be disposed distal of the mounting portion.

This invention relates to a cross-flow wave making pump comprising an impeller shell forming a water intake and a water outlet, an impeller assembly pivotally connected to two ends of the impeller shell, and a motor used for driving the impeller assembly; wherein, the impeller assembly comprises an impeller used for driving a liquid flow, a first turntable and a second turntable respectively fixed at two ends of the impeller, wherein the first turntable is provided with a shaft rotatably mounted in the impeller shell, the second turntable is provided with a cavity used for receiving a rotor shaft of the motor. The embodiments of the present invention can provide a sufficient liquid-circulation in a container, and significantly reduce the dead zone where the liquid flows extremely slowly. Other embodiments are disclosed.

A cooling or heating fluid circulation system of a cantilevered centrifugal pump, comprises a pump shaft, one end of which is connected with a vane wheel, a shaft sleeve sleeved on the periphery of the pump shaft, a left sealing gland and a right sealing gland, which are sleeved on the periphery of the shaft sleeve, are connected in sequence from one side of the vane wheel along the axial direction of the shaft sleeve; the gap between the left sealing gland and the said shaft sleeve is arranged with an inside rotating sealing ring fixed with the shaft sleeve and an inside stationary sealing ring fixed with the left sealing gland, an outside rotating sealing ring fixed with the shaft sleeve and an outside stationary sealing ring fixed with the right sealing gland are arranged in the gap between the right sealing gland and the shaft sleeve and away from the left sealing gland; a flow-restricted ring is arranged between the inner peripheral surface of the right sealing gland and the shaft sleeve; and a heat exchange fluid circulation channel, which is formed among the gap between the right sealing gland and the shaft sleeve, the shaft sleeve and the pump shaft, is connected with an external heat exchanger via an external channel. The present invention is capable of directly cooling or heating the rotating parts which are most in need of cooling or heating, thus the temperature of the rotating parts can be kept in a certain range.

A cooling or heating fluid circulation system of a cantilevered centrifugal pump, comprises a pump shaft, one end of which is connected with a vane wheel, a shaft sleeve sleeved on the periphery of the pump shaft, a left sealing gland and a right sealing gland, which are sleeved on the periphery of the shaft sleeve, are connected in sequence from one side of the vane wheel along the axial direction of the shaft sleeve; the gap between the left sealing gland and the said shaft sleeve is arranged with an inside rotating sealing ring fixed with the shaft sleeve and an inside stationary sealing ring fixed with the left sealing gland, an outside rotating sealing ring fixed with the shaft sleeve and an outside stationary sealing ring fixed with the right sealing gland are arranged in the gap between the right sealing gland and the shaft sleeve and away from the left sealing gland; a flow-restricted ring is arranged between the inner peripheral surface of the right sealing gland and the shaft sleeve; and a heat exchange fluid circulation channel, which is formed among the gap between the right sealing gland and the shaft sleeve, the shaft sleeve and the pump shaft, is connected with an external heat exchanger via an external channel. The present invention is capable of directly cooling or heating the rotating parts which are most in need of cooling or heating, thus the temperature of the rotating parts can be kept in a certain range.

A two piece impeller centrifugal pump comprising two halves of an impeller facing each other within a volute, a housing having two sides, one side adjacent each impeller half and having an inlet and an outlet, a motor mounted on the housing, the motor driving both impeller halves, for pumping fluid or material from the inlet to the outlet, the housing and the impeller halves having a sealing surface where they contact each other, the centrifugal force of the impeller forcing the fluid or material outward, pushing the two impeller halves outward against the housing.

A centrifugal pump for delivering coolant in vehicles and providing a centering of a pump impeller and a dampening of motor vibrations. The centrifugal pump having a pump housing consisting of a pump head, which forms a single part with a suction nozzle, a discharge nozzle, a spoke, and a bearing support, in which a counter bearing is mounted, in which a first region of a shaft is supported, around which a pump impeller is rotatably mounted via a slide bearing secured in the pump impeller, the spoke retaining the bearing support in a central position within the pump head and having a containment shell, which separates a wet chamber from a dry chamber and in which a second region of the shaft is supported. The invention seeks to solve the problem of providing in a generic centrifugal pump.

A centrifugal pump for delivering coolant in vehicles and providing a centering of a pump impeller and a dampening of motor vibrations. The centrifugal pump having a pump housing consisting of a pump head, which forms a single part with a suction nozzle, a discharge nozzle, a spoke, and a bearing support, in which a counter bearing is mounted, in which a first region of a shaft is supported, around which a pump impeller is rotatably mounted via a slide bearing secured in the pump impeller, the spoke retaining the bearing support in a central position within the pump head and having a containment shell, which separates a wet chamber from a dry chamber and in which a second region of the shaft is supported. The invention seeks to solve the problem of providing in a generic centrifugal pump.