VACUUM PUMP, AND ROTOR AND ROTARY VANE FOR USE IN VACUUM PUMP

Title:

VACUUM PUMP, AND ROTOR AND ROTARY VANE FOR USE IN VACUUM PUMP

Document Type and Number:

WIPO Patent Application WO/2021/015018

Kind Code:

A1

Abstract:

[Problem] To provide a vacuum pump having a structure wherein rupture occurs in a planned state at a planned location when greater-than-expected torque for rotating a rotor in the rotational direction of the rotor is generated, thereby providing inexpensive and stable impact absorption; as well as a rotor and rotary vane for use in the vacuum pump. [Solution] A vacuum pump 10 comprises: a case 11 in which an air inlet or an air outlet is formed; a stator disposed inside the case 11; and a rotor 17, housed within the case 11, that comprises a shaft 20 rotatably supported by the stator 18, and a rotary vane 19 which is formed by stacking a plurality of blades 22 in multiple stages on the circumference thereof to form a cylindrical shape, and which is anchored to the shaft 20 so as to be capable of rotating integrally therewith. The rotary vane 19 is provided with a rupture location restriction groove 32 serving as a rupture location restriction means that locally reduces the rigidity of the rotary vane 19 and restricts the location at which the rotary vane 19 ruptures.

Inventors:

TAKEDA SHUNSUKE (JP)

Application Number:

PCT/JP2020/027128

Publication Date:

January 28, 2021

Filing Date:

July 10, 2020

Export Citation:

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Assignee:

EDWARDS JAPAN LTD (JP)

International Classes:

F04D19/04

Domestic Patent References:

WO2012043027A1	2012-04-05
WO2012032863A1	2012-03-15

Foreign References:

JPH064392U	1994-01-21
JP2014181628A	2014-09-29
JPH10274189A	1998-10-13
JPH08114196A	1996-05-07
JP4484470B2	2010-06-16

Other References: