F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 47/02 (2006.01) E21B 43/12 (2006.01) F04C 15/00 (2006.01)
Patent
CA 2308164
The invention relates to a drive head, comprising a housing (12) with passages (24, 26) for the rod assembly (10) and a rotary-driven sleeve (30) which is arranged in said housing. Said sleeve (30) surrounds a section of the rod assembly (10) and is connected thereto by a coupling (40). A recoil brake (70) is provided for the controlled reduction of the torsion energy accumulated in the rod assembly. Said recoil brake (70) has a rotor (74) which is driven by means of the sleeve (30) and a stator (76) which is supported on the housing (12). The stator (76) is prevented from turning in relation to the housing (12) by a lock (82) which can only be released when the assembly (10) is essentially free of torsion energy. This ensures that it is safe to check whether the torsion energy has been essentially reduced.
L'invention concerne une tête d'entraînement, comportant un carter (12) muni de passages (24, 26) destinés aux tiges (10) et un manchon entraîné en rotation (30) disposé dans ce carter. Ledit manchon (30) entoure une section des tiges (10) auxquelles il est relié par l'intermédiaire d'un accouplement (40). Un frein de retour (70) permet la réduction contrôlée de l'énergie de torsion accumulée dans les tiges. Ce frein (70) comporte un rotor (74) entraîné à l'aide du manchon (30) et un stator (76) supporté sur le carter (12). Un verrouillage (82) empêche le stator (76) de tourner par rapport au carter (12), ce verrouillage ne pouvant être libéré que lorsque les tiges (10) sont pratiquement dépourvues d'énergie de torsion. Cela permet de s'assurer sans danger que l'énergie de torsion a été pratiquement supprimée.
Netzsch-Mohnopumpen Gmbh
Sim & Mcburney
LandOfFree
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