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US 10,094,385 B2Granted
Multi-stage centrifugal pump
AssigneeGrundfos Holding A/S
InventorsSteen Mikkelsen, Carl-Christian Danielsen
Life of this patent
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Abstract
A multistage centrifugal pump includes a foot part (1) and a head part (7), between which several pump stages are arranged. Each of the pump stages includes an impeller (4) and a housing (5) surrounding the impeller (4). The housings (5) are arranged over one another. The housings (5) together with an outer casing (9) form an annular channel (8). The housings (5) together with an outer casing (9) are clamped via clamping bolts (11) which are fastened on the head part (7) and the foot part (1). The clamping bolts (11) are arranged within the annular channel (8).
Claims20
A multi-stage centrifugal pump comprising:
- a foot part comprising a suction connection and a delivery connection for the entirety of a working fluid of the multi-stage centrifugal pump;
- a head part;
- at least two pump stages arranged between the foot part and the head part, each of said stages comprising an impeller and a housing surrounding the impeller;
- an outer casing surrounding each housing at a distance and forming an annular channel;
- clamping bolts connecting the head part and the foot part to one another amid the inclusion of the casing and the housings, wherein the annular channel leads delivery fluid to one of the suction connection and the delivery connection, wherein the clamping bolts are arranged in the annular channel.
2 more elements
A multi-stage centrifugal pump comprising:
- a foot part comprising a suction connection and a delivery connection;
- a head part;
- a plurality of pump stages arranged between the foot part and the head part, each of the stages comprising an impeller and a housing surrounding the impeller;
- an outer casing surrounding each housing associated with the plurality of pump stages, the outer casing comprising an inner casing surface, the inner casing surface and each housing associated with the plurality of pump stages defining an annular channel, the annular channel defining at least a portion of an entire pressurized fluid flow path, wherein the annular channel is in fluid communication with one or of more of the suction connection and the delivery connection for delivering a delivery fluid to at least one of the suction connection and the delivery connection;
- a plurality of clamping bolts, the head part being connected to the foot part via the plurality of clamping bolts, at least a portion of each of the clamping bolts being arranged in the annular channel, wherein a compressive force is applied to the entire pressurized fluid flow path via the clamping bolts being connected to the foot part and the head part, the entire pressurized fluid flow path comprising the at least one of the suction connection and the delivery connection, the annular channel and the plurality of pump stages.
2 more elements
A multi-stage centrifugal pump comprising:
- a foot part comprising a suction connection and a delivery connection;
- a head part;
- a plurality of pump stages arranged between the foot part and the head part, each of the stages comprising an impeller and a housing surrounding the impeller;
- an outer casing surrounding each housing associated with the plurality of pump stages, the outer casing comprising an inner casing surface, the inner casing surface and each housing associated with the plurality of pump stages defining an annular fluid flow path, the annular fluid flow path being in fluid communication with one or of more of the suction connection and the delivery connection for delivering a delivery fluid to at least one of the suction connection and the delivery connection;
- a plurality of clamping bolts, the head part being connected to the foot part via the plurality of clamping bolts, at least a portion of each of the clamping bolts being arranged in the annular fluid flow path, wherein a compressive force is applied to an entire pressurized fluid flow path via the clamping bolts being connected to the foot part and the head part, the entire pressurized fluid flow path comprising the annular fluid flow path, the plurality of pump stages and the at least one of suction connection and the delivery connection.
2 more elements
Dependencies are inferred from the claim text.