Embodiments of this application provide a centrifugal pump. The centrifugal pump includes a pump casing and a first drive mechanism, a second drive mechanism, a pump shaft, and an impeller that are disposed in the pump casing. The pump casing includes a first chamber and a second chamber that are connected. An axis of the pump shaft coincides with axes of the first chamber and the second chamber. An inner diameter of the second chamber is greater than that of the first chamber. The impeller is connected to an end of the pump shaft. The first drive mechanism and the second drive mechanism are connected to the pump shaft and located on a side, away from the impeller, of the pump shaft. The first drive mechanism is configured to drive the pump shaft to rotate.

The present invention relates to a pressure wall for a centrifugal pump for fluid having substantially the shape of a disc, the disc-shaped pressure wall having a central axis, the pressure wall comprising: a top surface; and a bottom surface opposing the top surface; wherein the top surface includes an inner surface section and an outer surface section, wherein the inner surface section extends radially from the central axis and is recessed to form a central recess; and wherein the outer surface section includes an inner circumferential edge portion and an outer circumferential edge portion, wherein the inner circumferential edge portion is located closer to the central axis than the outer circumferential edge portion, and wherein the outer circumferential edge portion is located higher than the inner circumferential edge portion with respect to a plane perpendicular to the central axis and passing through the inner circumferential edge portion.

A centrifugal pump including an outer case; an inner case; a first unit and a second unit placed in fluid communication with each other, each unit including a plurality of impellers; the inner case includes two half-parts joined along a connection plane containing the axis of rotation; a connecting element is placed between the first unit and the second unit, the connecting element is engaged with a last impeller of the first unit and with a last impeller of the second unit.

The invention relates to a separating device for a turbomachine, comprising at least one housing (12) that has at least one bearing receiving area (24), which defines at least one bearing axis (26), and at least one wheel-side area (28). The separating device also comprises at least one swirling unit (32), which is arranged on the housing (12) in particular, for deflecting and/or swirling at least one fluid and/or particle flow (34), wherein the swirling unit (32) has at least one flow recess (38) which is delimited by a wall (36) of the housing (12) and which extends within the wheel-side area (28) at a distance from the bearing axis (26). According to the invention, the swirling unit (32) comprises at least one seal gap element (40) which is arranged on a wall (36) of the housing (12) and which is designed to deflect and/or swirl at least one fluid and/or particle flow (34) flowing through the flow recess (38) along the bearing axis (26) and/or towards the bearing axis (26).

A pump device is for sucking and transferring objects. The pump device includes a pump housing, at least one impeller, an air withdrawal opening, at least one inlet opening defined in the pump housing, at least one outlet opening defined in the pump housing, and at least one chive device connected to the pump device. The pump housing includes a first short side defined as a semicircle or a partial circle and a second short side defined as a flat or plane surface, two long sides having a tapered shape extending from the first short side to the second short side, and two planar sides so as to define a closed pump housing. The at least one impeller is in the pump housing.

Centrifugal pump systems and related methods are disclosed herein that can shift a best efficiency point of a pump based on one or more operating conditions to operate more efficiently across and/or adjust to a broader range of conditions. Pumps provided for herein can include an adaptive volute in which a geometry of the volute can be adjusted to shift an operating efficiency of the pump. In some embodiments, a height or radial dimension of the adaptive volute can be adjusted based on one or more operating condition. A geometry of the adaptive volute can be adjusted during operation of the pump and/or while an impeller is disposed within the volute. In some embodiments, a first and second collar can be disposed within the adaptive volute. Rotation of the first component can move the second component axially, which can expand or contract an axial dimension of the adaptive volute.

The technology relates to a submersible water lifting assembly and automatic fire fighting system for unmanned platforms having said system (1) that is efficient yet simple to install, energy saving, noise free and economical. The submersible water lifting assembly can comprise a High flow Ratio ejector Pump (30/30A) that utilizes under water arrangements of unmanned platform and enables the fire-fighting system to efficiently lift water from the sea water; using the force of existing water injection system; eliminating the requirement of diesel engine driven pump, for lifting the water. It avoids fire risk of the safety system itself, even in conditions of a large fire, unlike that of the prior art.

A smart molten metal pump system and method automatically controls the operating speed of the pump rather than requiring an operator to control the speed. The system includes a pump, a controller for controlling the speed of the pump and one or more vibration sensors (such as an accelerometer) to measure vibration. The controller receives input about the vibration of the pump or one or more pump components, and possibly other data, such as the temperature of the molten metal, and/or the depth of the molten metal, ad/or parameters related to the operation of the pump. The controller analyzes the one or more inputs to vary the speed of the pump, turn the pump off, and/or send a communication to an operator.

A cooling apparatus includes a casing, pumping unit, and heat exchange unit. The pumping unit includes a body and housing. The body includes a wishbone-shaped indentation and lollipop shaped indentation separate from the wishbone-shaped indentation. The housing includes a wishbone-shaped flow path and lollipop-shaped flow path separate from the wishbone-shaped flow path. The body is coupled to the housing such that the wishbone-shaped indentation and the wishbone-shaped flow path define a first flow path and the lollipop-shaped indentation and the lollipop-shaped flow path define a second flow path. The pumping unit is coupled to the heat exchange chamber such that the first flow path and the second flow path is in fluid communication with the heat exchange chamber via a first end opening and second end opening, and third opening, respectively.

Provides heating pump cover and heating pump, heating pump cover comprises: cover body, comprising flange plate and sealing piece, sealing piece is outside and integrally connected with flange plate, with cross-section stepped, flange plate comprises first surface and second surface arranged oppositely, first surface is for contacting with liquid, temperature control assembly, arranged on second surface, heating body, arranged on one side of first surface, and end of heating body penetrates flange plate, sealing and connecting flange plate, connecting to temperature control assembly by electric circuit. Arranging sealing piece on outer side of flange plate on cover body, with cross-section stepped, after being installed onto pump body, achieving multi-level snapping and sealing, effectively avoiding situation of liquid leakage happen at connecting portion between cover body and pump body due to aging or not tightly sealing, improving sealing performance and reliability of cover body installation.