Title:
DEVICE FOR REDUCING AIR RESISTANCE AND AIR FILM AT TIME WHEN WHEELS OF RAILROAD VEHICLE ARE IN CONTACT WITH RAIL
Document Type and Number:
WIPO Patent Application WO/2012/096000
Kind Code:
A1
Abstract:
Along with an increase in speed of railroad vehicles, a wheel slip due to an air resistance and an air film caused when a wheel is rotated, a resistance due to air turbulence caused at the back of the wheel, and the like, which were negligible in the case of past middle-speed vehicles, become non-negligible factors, but all the factors are overcome if the vicinity of the wheel and a rail are approximately vacuated. A cover is put on the vicinity of the wheel and the rail entirely as much as possible, and a vent which is communicated with the inside of the cover is formed on a side thereof. With this structure, as the vehicle runs at higher speed, air inside the cover is sucked out of the cover in accordance with Bernoulli's theorem, and even in a part of the bottom of the wheel where the cover cannot be put, air is prevented from getting into the inside because of Bernoulli's theorem.
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Inventors:
MOTOYAMA KENNITI (JP)
Application Number:
PCT/JP2011/051395
Publication Date:
July 19, 2012
Filing Date:
January 26, 2011
Export Citation:
Assignee:
MOTOYAMA KENNITI (JP)
International Classes:
B61F13/00; B61F19/02
Foreign References:
| JP2003146002A | 2003-05-21 | |||
| JP2009126315A | 2009-06-11 | |||
| US1612944A | 1927-01-04 |
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