Pitch variation control device for the blades of a turbomachine rotor and method of operating the device
US5595474A · kind A · utility
41Cited by
12References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1996 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Apr 4, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for controlling the pitch of the blades of a turbomachine rotor includes an electric motor having a stator which is stationary and a rotor, preferably of the permanent magnet or asynchronous kind, which is mounted on the turbomachine shaft and is rigidly secured to a toothed wheel meshing with pinion sectors rigidly secured to the roots of the blades, and a mechanism for locking the blade roots in position which includes an electromechanical actuator rigidly secured to the shaft and electrically powered by a rotary transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.