Patent ID: 11967449
Assignee: HITACHI ENERGY LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A transformer tank for a shell type transformer, comprising:
a wall, the wall surrounding a tank interior,
a clamping arrangement for exerting a clamping force on a magnetic core of the shell type transformer, which is arranged on an inside of the wall in the tank interior, the clamping arrangement comprising:
a beam fixed on the wall,
a plunger, the plunger comprising a first axial end configured to exert the clamping force on the magnetic core, wherein the plunger is movable with respect to the beam along its longitudinal axis and a value of the clamping force is settable depending on the position of the plunger relative to the beam,
a screw device, the screw device being contact with a second axial end of the plunger for moving the plunger along its longitudinal axis
a plunger sleeve, the plunger sleeve being arranged inside the beam,

the plunger arranged inside the plunger sleeve and movable with respect to plunger sleeve along its longitudinal axis,
the plunger sleeve comprising a first axial end and an opposite second axial end,
the screw device arranged at the first axial end,
the screw device comprising one or more screws,
the screws being turnable in a thread of the plunger sleeve to move with respect to the plunger sleeve along the longitudinal axis, such that a part of the screw that protrudes the sleeve interior is settable, and
the second axial end of the plunger arranged at the first axial end of the plunger sleeve and in contact with the screw device.