Method of and drive for actuating absorber rods in pebble bed reactors
US4341733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Feb 8, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of actuating absorber rods in pebble bed reactors, according to which the rod is moved into or out of the ball pile with limited advancing speed in a turning or rotary manner. A feeding or advancing force is transmitted onto the rod being introduced, and this force does not exceed the appropriate maximum value of the ball strength and the rod stability. The drive provided for the foregoing procedure effects both a longitudinal shifting and rotation of a rod connected therewith, and has an axially fixed advancing spindle, the spindle nut of which is rigidly connected with the absorber rod and is journalled in a rotary pipe or tube in such a way as to be axially displaceable yet fixed against rotation, with the rotary tube being driven at a constant speed. During removal or outward travel of the rod from the ball pile, a fixed transmission ratio exists between the driving mechanism and driven end, which fixed transmission is generated with the aid of a freewheel or free-running drive. A coupling is provided between the drive motor and the spindle to limit the transferrable torque or turning moments according to a predetermined characterizing line or curve, whereby the rotary…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.