Title:
VACUUM PUMP
Document Type and Number:
Japanese Patent JP2023106779
Kind Code:
A
Abstract:
To correct deviation of a gravity center position of a rotor from a rotation center.SOLUTION: A vacuum pump 1 includes a housing 2 and a rotor 4. The rotor 4 is arranged on an inner peripheral side of the housing 2 and is rotary driven and has a first cylindrical part 22, a wall part 23, and an opening 25. The first cylindrical part 22 extends in the direction of a rotation axis A1 of the rotor 4. The wall part 23 closes an end on an intake port 13 side of the first cylindrical part 22. The opening 25 is formed in the wall part 23 and communicates the intake port 13 side of the wall part 23 and an inner peripheral side of the first cylindrical part 22 with each other. A virtual gravity center position of the rotor when assuming that no opening 25 is formed is at a position deviated from the rotation center of the rotor 4. The opening 25 is formed so that the gravity center position of the rotor 4 moves from the virtual gravity center position in the direction of the rotation center.SELECTED DRAWING: Figure 3
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Inventors:
MANABE MASATSUGU
Application Number:
JP2022007709A
Publication Date:
August 02, 2023
Filing Date:
January 21, 2022
Export Citation:
Assignee:
SHIMADZU CORP
International Classes:
F04D19/04
Attorney, Agent or Firm:
Takuji Yamashita
Shinji Okazaki
Shinji Okazaki
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