Title:
AIR MOTOR AND ELECTROSTATIC COATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/073475
Kind Code:
A1
Abstract:
Provided are an air motor and an electrostatic coating device which have improved efficiency. For this, the air motor and the electrostatic coating device comprise: a housing (12); a main shaft (2) which is inserted in the housing (12); a impeller (4) which has a part thereof disposed in the housing and fixed coaxially with the main shaft, the impeller (4) including a plurality of turbine vanes (10) formed along the outer circumferential surface thereof; bearings (14, 16) for rotatably supporting the main shaft and the impeller; and a nozzle part (a turbine air nozzle hole (28) and a brake air nozzle hole (34)) which includes a flow passage shaped like a tube or hole for blowing compressed air toward the turbine vanes to rotate the impeller in the circumferential direction. The length of the flow passage of the nozzle part is set to be equal to or greater than a value (L) calculated by a predetermined numerical formula constituted by the hydraulic radius (rh) of the flow passage of the nozzle part, the viscous friction coefficient (cf) of the surface of the flow passage, the ratio of specific heat (k) of the compressed air, the velocity (ve) of the compressed air at an inlet of the flow passage, the speed of sound (a0), and M1=ve/a0.
Inventors:
KOBAYASHI NAOYA (JP)
NAKAMURA TSUYOSHI (JP)
KOIWA YUU (JP)
NAKAMURA TSUYOSHI (JP)
KOIWA YUU (JP)
Application Number:
PCT/JP2011/006614
Publication Date:
June 07, 2012
Filing Date:
November 28, 2011
Export Citation:
Assignee:
NSK LTD (JP)
KOBAYASHI NAOYA (JP)
NAKAMURA TSUYOSHI (JP)
KOIWA YUU (JP)
KOBAYASHI NAOYA (JP)
NAKAMURA TSUYOSHI (JP)
KOIWA YUU (JP)
International Classes:
F01D1/06
Foreign References:
| JP2008057363A | 2008-03-13 | |||
| JP2006194203A | 2006-07-27 | |||
| JPH11289713A | 1999-10-19 | |||
| JPH08117245A | 1996-05-14 | |||
| JP2005048605A | 2005-02-24 | |||
| JP2000033292A | 2000-02-02 | |||
| JPH09262509A | 1997-10-07 |
Other References:
YASUO MORI ET AL., NETSU RIKIGAKU GAIRON, 30 March 2001 (2001-03-30), YOKENDO, pages 213 - 214, XP008172749
YASUO MORI; SYOJI ISSHIKI; HARUO KAWADA: "Introduction to Thermodynamics", 1989, YOKENDO, CO.., LTD., pages: 214
YASUO MORI; SYOJI ISSHIKI; HARUO KAWADA: "Introduction to Thermodynamics", 1989, YOKENDO, CO.., LTD., pages: 214
Attorney, Agent or Firm:
MORI, Tetsuya et al. (JP)
Woods Tetsuya (JP)
Woods Tetsuya (JP)
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Claims: