Title:
MANUFACTURE OF VORTEX TYPE VACUUM PUMP AND ITS ROTOR
Document Type and Number:
Japanese Patent JPH02112697
Kind Code:
A
Abstract:
PURPOSE: To improve the exhaust characteristics by forming a pointed part at each of the entry and exit part of a blade axially having both an inlet and an outlet.
CONSTITUTION: Each disk 80 of a rotor 8 and a blade 81 formed around the disk 80 are integrally formed by a casting means. Both the front and the rear face of the disk 80 are ground to form pointed parts 82 and 83 at the gas entry 8a and exit 8b of each blade 81, that is, at the upper and lower opposing edges of the inner side face of the blade 81 which is exposed to gas when it is exhausted. When molecule of gas passes in the axial direction of the blade 81, the passing will be smooth so that the high exhaust characteristics may be attained.
Inventors:
SAKAMOTO RYUICHI
MATSUMOTO TAKAO
HAGIWARA SHIGEKI
TANIGUCHI BUNICHI
MATSUMOTO TAKAO
HAGIWARA SHIGEKI
TANIGUCHI BUNICHI
Application Number:
JP26448688A
Publication Date:
April 25, 1990
Filing Date:
October 20, 1988
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F04D23/00; (IPC1-7): F04D23/00
Domestic Patent References:
| JPS5065912A | 1975-06-03 | |||
| JPS56141098A | 1981-11-04 | |||
| JPS63147989A | 1988-06-20 |
Attorney, Agent or Firm:
Kunio Hirose (1 person outside)