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Multistage pump body and multistage gas pump

A multi-stage pump and pump body technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve the problems of unsatisfactory efficiency of multi-stage pumps

Pending Publication Date: 2021-09-14
ATELIERS BUSCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The cooling of multi-stage pumps described in the documents and patents mentioned above does not have a fully satisfactory efficiency

Method used

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  • Multistage pump body and multistage gas pump
  • Multistage pump body and multistage gas pump
  • Multistage pump body and multistage gas pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The multistage pump 1 according to one embodiment of the present invention is figure 1 shown separately. The multistage pump comprises a multistage pump body 2 carrying at each end a housing 3 on which is arranged one of two electric motors 4 and 5 synchronized with each other.

[0046] From figure 2 It can be seen that the multistage pump 1 is a lobe pump. However, the invention is not limited to lobe pumps. For example, claw pumps or gear pumps can also be used in accordance with the invention.

[0047] The multistage pump 1 comprises two rotary shafts 8 , which are rotationally driven in opposite directions, one of which is driven by the electric motor 4 and the other by the electric motor 5 . Each rotating shaft 8 carries three rotors, each forming part of a pair of complementary rotors 9 . Each rotor 9 comprises a plurality of lobes, four in number in the embodiment represented. However, the number of lobes of the rotor 9 may be different from four.

[0048...

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PUM

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Abstract

A multistage pump body comprises a first pumping chamber (20) and a second pumping chamber (21). A connecting duct (26a) puts an outlet (27) of the first pumping chamber (20) into communication with an inlet (28) of the second pumping chamber (21). A leaktight conduit (40) is provided for the circulation of a cooling liquid. The connecting duct (26a) is a lateral duct of the multistage pump body. A heat-conducting wall (33) partially delimits the connecting duct (26a) and has an external surface (34) on the outside. At least one portion of the connecting duct (26a) passes between this external surface (34) of the heat-conducting wall (33) and the leaktight conduit (40).

Description

technical field [0001] The present invention relates to a multistage pump body and a multistage pump, especially, the multistage pump may be a vacuum pump. In the following text and in the appended claims, the term "pump" covers gas-driven pumps, vacuum pumps and compressors, while the term "pump body" refers to the components which may belong to such gas-driven pumps, such vacuum pumps and such compressors. part. Background technique [0002] It is known that a multistage pump is a pump comprising several successive pumping chambers, wherein the connecting ducts are connected such that the compressed gas in one pumping chamber (except the last pumping chamber) is directed to The inlet of the subsequent pumping chamber. [0003] The compression of the gas in each pumping chamber results in the release of heat, for the removal of which various cooling devices have been proposed. [0004] European patent EP 2 626 562 B1 describes a multistage pump in which, in the path betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01C21/10F04C29/04F04C23/00
CPCF01C21/10F04C29/04F04C18/123F04C18/126F04C18/14F04C23/001F04C29/12F05B2210/12
Inventor T·伊尔切夫S·德西S·瓦芮
Owner ATELIERS BUSCH