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1. (WO2018110467) VACUUM PUMP, STATOR COLUMN USED THEREIN, AND MANUFACTURING METHOD FOR SAME

Pub. No.:    WO/2018/110467    International Application No.:    PCT/JP2017/044247
Publication Date: Fri Jun 22 01:59:59 CEST 2018 International Filing Date: Sat Dec 09 00:59:59 CET 2017
IPC: F04D 19/04
Applicants: EDWARDS JAPAN LIMITED
エドワーズ株式会社
Inventors: MITSUHASHI Keita
三橋 啓太
MIWATA Tooru
三輪田 透
Title: VACUUM PUMP, STATOR COLUMN USED THEREIN, AND MANUFACTURING METHOD FOR SAME
Abstract:
Provided, without lowering exhaust performance or increasing the number of components or costs, is a vacuum pump, a stator column used therein, and a manufacturing method for the same which are suitable and highly reliable in preventing faults such as the cracking of the stator column due to the fracture energy of a rotary body or the ejection of fragments produced by damage to the stator column from an intake port. The vacuum pump is provided with: an outer body (1) having an intake port (1A); a stator column (3) installed inside the outer body; a rotary body (4) having a shape surrounding the outer periphery of the stator column; a support means for rotatably supporting the rotary body; and a drive means for rotationally driving the rotary body. The rotation of the rotary body causes the intake port to take in gas. The stator column (3) is an aluminum alloy casting material having an elongation of at least 5% as a mechanical material property.