公开(公告)号：US09324493B2

公开(公告)日：2016-04-26

申请号：US14431157

申请日：2013-09-11

Applicant: ABB Technology Ltd

Inventor： Per Krainer ,  Harald Hedsten

IPC: H01F21/12 ,  H01H35/38 ,  F16K31/44 ,  H01F29/04

CPC classification number: H01F29/04 ,  H01H3/605 ,  H01H9/0027

Abstract: An actuator for a tap changer of an electrical transformer, including: a piston, being hollow to define a piston space; a cylinder arranged around the piston such that the piston is arranged to be movable axially into and out of the cylinder; a piston ring fixed to the outside surface of the piston such that a cylinder space is formed between the piston and the cylinder and delimited by the piston ring, the cylinder space having a variable volume which is configured to vary with axial movement of the piston; and a spring engaging both the piston and the cylinder such that the spring is able to be compressed and elongated, respectively, with axial movement of the piston. The piston space is connected to the cylinder space via at least one hole through the hollow piston. The piston space is connected to an outside of the piston.

Abstract translation: 一种用于电变压器的分接开关的致动器，包括：活塞，其中空以限定活塞空间; 气缸，其布置在所述活塞周围，使得所述活塞被布置成可轴向移动和移出所述气缸; 活塞环固定到活塞的外表面，使得在活塞和气缸之间形成气缸空间并且由活塞环限定，气缸空间具有可变容积，该容积构造成随着活塞的轴向运动而变化; 以及与活塞和气缸接合的弹簧，使得弹簧能够随着活塞的轴向运动而分别被压缩和拉长。 活塞空间通过中空活塞的至少一个孔连接到气缸空间。 活塞空间连接到活塞的外部。

公开(公告)号：US20150235760A1

公开(公告)日：2015-08-20

申请号：US14431157

申请日：2013-09-11

Applicant: ABB TECHNOLOGY LTD

Inventor： Per Krainer ,  Harald Hedsten

IPC: H01F29/04

CPC classification number: H01F29/04 ,  H01H3/605 ,  H01H9/0027

Abstract: An actuator for a tap changer of an electrical transformer, including a piston, being hollow to define a piston space; a cylinder arranged around the piston such that the piston is arranged to be movable axially into and out of the cylinder; a piston ring fixed to the outside surface of the piston such that a cylinder space is formed between the piston and the cylinder and delimited by the piston ring, the cylinder space having a variable volume which is configured to vary with axial movement of the piston; and a spring engaging both the piston and the cylinder such that the spring is able to be compressed and elongated, respectively, with axial movement of the piston. The piston space is connected to the cylinder space via at least one hole through the hollow piston. The piston space is connected to an outside of the piston.

Abstract translation: 一种用于电气变压器的分接开关的致动器，包括活塞，中空以限定活塞空间; 气缸，其布置在所述活塞周围，使得所述活塞被布置成可轴向移动和移出所述气缸; 活塞环固定到活塞的外表面，使得在活塞和气缸之间形成气缸空间并且由活塞环限定，气缸空间具有可变容积，该容积构造成随着活塞的轴向运动而变化; 以及与活塞和气缸接合的弹簧，使得弹簧能够随着活塞的轴向运动而分别被压缩和拉长。 活塞空间通过中空活塞的至少一个孔连接到气缸空间。 活塞空间连接到活塞的外部。