Damping device

Abstract

The invention discloses a damping device and a breaker. The damping device comprises a cylinder body, a piston, a piston rod, a channel and a pressure relief device, wherein the cylinder body comprises a first end cover, a cylinder barrel and a second end cover; one end part of the piston rod runs through the first end cover, extends into the cylinder body, and is fixed to the piston in the cylinder body; the piston partitions the cylinder body into a first chamber located at the side of the first end cover and a second chamber; the pressure relief device is assembled on the cylinder body; a valve rod part of a built-in pressure relief valve core of the pressure relief device extends towards the first chamber; the breaker comprises a single-pole switch; the single-pole switch is axially connected with the damping device; the damping device decompresses and relieves damping at the end of the stroke of a vacuum bubble moving contact when closed; damping force is prevented from promoting a closing bounce of the moving contact of the breaker; and the closing performance is improved. The pressure relief device is arranged on the cylinder body of the damping device, so that installation and maintenance of the pressure relief device and change of the pressure relief valve core are facilitated.

Description

technical field [0001] The invention relates to a damping device, in particular to a damping device that generates damping at the front end of the stroke and releases damping at the end of the stroke and is easy to maintain, and a circuit breaker using the damping device, belonging to the field of electric equipment. Background technique [0002] After the circuit breaker is opened, the speed of the moving contact of the vacuum bubble is still high when it moves to the end of its stroke. The moving contact collides with the limit piece and rebounds. When the distance between the moving contact and the static contact is less than the discharge When the critical distance is reached, discharge occurs and arcing occurs. For the opening rebound of the moving contact, a damping device is often used to consume the energy of the moving contact and prevent it from rebounding after opening. When closing, the high-speed moving moving contact in the vacuum bubble collides with the stat...

AI Technical Summary

Problems solved by technology

The dynamic performance of opening and closing of high and low voltage circuit breakers with damping devices and energy storage devices has been greatly improved. However, when closing, the damping force generated by the damping device is in the same direction as the closing bounce of the moving contact. , to promote the closing bounce of the moving contact and affect the closing performance

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