Title:
TRACTION DRIVE STEP-UP GEAR FOR WINDMILL GENERATOR
Document Type and Number:
Japanese Patent JP3025108
Kind Code:
B2
Abstract:
PURPOSE: To secure the safety against the excessive torque by determining the slip ratio between both the input and output shafts of a step-up gear with revolving speed detectors of them, and setting the load to zero when it exceeds the first set value and is increased with the passage of time and when it exceeds the second set value.
CONSTITUTION: The revolving speed of a vane side input shaft 4 is measured with a revolving speed detector 15, the revolving speed of a generator side output shaft 5 is measured with a revolving speed detector 16, the signals are fed to an arithmetic unit 18 via a rotation ratio meter 17 to calculate the slip ratio, and the time differential value of the slip ratio is calculated by a differentiator 19. The obtained value is compared and judged by a comparing/ judging unit 20, and a signal to set the generator load to zero is issued when it exceeds preset values. The first set value is a slip ratio for the traction coefficient of the maximum value, and the second set value is a slip ratio on the high-slip side for the traction coefficient used in the design of a traction drive step-up gear. No excessive torque is applied, and the reliability and durability of an apparatus are improved.
Inventors:
Sada Takahashi
Youichi Iwanaga
Akihiro Suzuki
Youichi Iwanaga
Akihiro Suzuki
Application Number:
JP22142492A
Publication Date:
March 27, 2000
Filing Date:
August 20, 1992
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
F16H13/08; F16H61/00; H02P9/00; (IPC1-7): H02P9/00; F16H13/08; F16H61/00
Domestic Patent References:
| JP63199955A | ||||
| JP2157483A | ||||
| JP579450A | ||||
| JP57208849A | ||||
| JP61112780A | ||||
| JP6325864U |
Attorney, Agent or Firm:
Koharu Fujita (3 outside)