Title:
VACUUM PUMP AND FIXED COMPONENT
Document Type and Number:
WIPO Patent Application WO/2024/043276
Kind Code:
A1
Abstract:
[Problem] To provide a vacuum pump and a fixed component by which: it is possible to suppress the occurrence of casting cavities and sink marks in a thick part of a fixed component formed by casting; and by which it is possible promote heat transfer in the fixed component. [Solution] A vacuum pump 201 comprises: a casing 211; a rotor shaft 113 that is enclosed by an exterior body and is rotatably supported; a rotor 103 that is fixed to the rotor shaft 113 and rotates together with the rotor shaft 113; and an annular fixed component that, in conjunction with the rotor 103, exhausts taken-in gas. The fixed component is formed by casting, and has: a first part 246 and a second part 245 opposing each other so as to sandwich at least one reduction groove 255, which extends along the circumferential direction of the fixed component, for reducing volume; and a bottom part 258 that is disposed so as to include at least the bottom of the reduction groove 255 and connects the first part 246 and the second part 245. The fixed component includes a heat transfer improving structure 256 for improving heat transfer between the first part 246 and the second part 245.
Inventors:
SHIBATA YASUHIRO (JP)
SATO KENTARO (JP)
SATO KENTARO (JP)
Application Number:
PCT/JP2023/030312
Publication Date:
February 29, 2024
Filing Date:
August 23, 2023
Export Citation:
Assignee:
EDWARDS JAPAN LTD (JP)
International Classes:
F04D19/04
Foreign References:
| JP2020197152A | 2020-12-10 | |||
| JP2020082157A | 2020-06-04 |
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