Turning device especially for driving a turbine shaft
US4267738A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Jan 17, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19502
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turning device preferably for turbine-machines is disclosed having a turning-gear pinion arranged on a cam so that the axes of rotation of the cam, the turning-gear pinion and the shaft to be turned are aligned in a central line. To turn the shaft, the turning-gear pinion is caused to engage a toothed ring of the shaft by a hydraulic piston acting on the cam. The turning-gear piston is then held in the engaged position by a spring-loaded pressure cylinder which engages a catch of the cam. When a certain speed has been reached, or when the shaft is turning backward, the spring loaded pressure cylinder becomes disengaged from the catch and the turning-gear pinion swings out sideways.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.