Off-circuit tap-changer with in-place operation hand feeling

Abstract

The invention discloses an off-circuit tap-changer with an in-place operation hand feeling. The off-circuit tap-changer is characterized by comprising a main shaft arranged on an upper supporting seatand a lower supporting seat in a penetrating manner; one end of the main shaft is connected with an intermittent motion mechanism, the output end of the intermittent motion mechanism is connected with a moving contact support, the moving contact support is provided with a wedge-shaped moving contact assembly which is in sliding connection with the moving contact support in the radial direction, the circumference of the moving contact assembly is correspondingly provided with a static contact column matched with the moving contact assembly, and the main shaft is further provided with a double-roller cam mechanism matched with a moving contact supporting piece. The intermittent motion mechanism is combined with the double-roller cam mechanism, each cam is matched with at least two rollers,so that the switch has in-place hand feeling and in-place sound, the vibration hand feeling can overcome membrane resistance caused by contact between the moving contact and the static contact, and the reliability of the switch is further improved.

Description

technical field [0001] The invention relates to the technical field of an off-excitation tap changer, in particular to an off-excitation tap changer with in-position operation feel. Background technique [0002] The wedge-shaped contact structure drum-shaped off-excitation tap changer is a product designed for the technology introduced from the Soviet Union to China in the 1980s. This off-excitation tap-changer has been used for many years. Due to the high precision requirements for manufacturing and the limited number of gears Most of the defects such as , operation and so on are gradually eliminated by other structural switches, so that the structural switches are no longer produced in China. [0003] The Chinese Patent Office CN 104465155 B published "A Type of Non-excitation Tap-Changer After Moving Contact Unloading" has improved the above-mentioned defects. It mainly includes: main shaft, gear indicator rod, shield cover, gear system, sheave system, contact bracket, m...

AI Technical Summary

Problems solved by technology

However, there are the following problems during the operation: ① During the whole process of shifting, there is no feel and sound of the moving contact in place, and it is difficult to determine whether the switch moving contact is in place from the mechanism

② When shifting gears, the moving contact slides and rubs along the surface of the static contact column, which increases the wear of the contact, and is particularly easy to wear off the coating on the surface of the dynamic and static contact columns. The metal powder that falls off due to friction will also pollute the transformer oil.

Images