Tensioning device for a surge arrester, production method and surge arrester
AssigneeSiemens Aktiengesellschaft
InventorsBernd Kruska, Dirk Springborn, Kai Steinfeld
Life of this patent
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Abstract
A tensioning device is provided for a surge arrester having an end fitting and tensioner. The tensioning device has an axial clearance for receiving a tensioner and a region being conically tapered in axial direction to be introduced into a clearance of the end fitting being shaped for a substantially exact fit. The conically tapered region has delimitation walls defining the axial clearance for the tensioner being movable toward a clearance interior. An antifriction layer is applied to the surface of the conically tapered region. A production method for a surge arrester and a corresponding surge arrester are also provided.
Claims16
A tensioning device for a surge arrester having a tensioner and an end fitting with a clearance, the tensioning device comprising:
- a region being conically tapered in axial direction, said conically tapered region having a surface being shaped for introduction into the clearance of the end fitting with a substantially exact fit;
- delimiting walls forming an axial clearance having a clearance interior for receiving the tensioner, said delimiting walls in said conically tapered region being movable toward said clearance interior;
- and
- an antifriction layer applied to said surface of said conically tapered region.
A production method for a surge arrester, the method comprising the following steps:
- providing a plurality of tensioning devices each including a region being conically tapered in axial direction and delimiting walls, the delimiting walls forming an axial clearance for receiving a tensioner, the axial clearance having a clearance interior, and the delimiting walls being movable toward the clearance interior in the conically tapered region;
- introducing a respective holding device into each respective axial clearance;
- subsequently wrapping a polytetrafluoroethylene tape around at least the conically tapered region of each respective tensioning device;
- removing the holding devices from the tensioning devices;
- placing a respective tensioner into each respective tensioning device;
- placing the tensioning devices conjointly with the tensioners into clearances in an end fitting with an exact fit;
- and
- using the tensioning devices to secure the tensioners in the end fitting by traction to permit a discharge column having semiconductor resistors to be secured in a compressed manner between two of the end fittings by using a cage of rods.
Dependencies are inferred from the claim text.