Brush braid type generator large shaft grounding device

Abstract

The invention discloses a brush braid type generator large shaft grounding device, comprising: a support assembly comprising a bottom support, an upper support connected to the bottom support in a sliding manner, and a sliding member arranged between the upper support and the bottom support; the frame rod assembly comprises a first bending arm arranged on the upper end support, a second bending arm arranged on the upper end support and an adjusting part arranged on the upper end support; the grounding assembly is arranged at the end of the first bending arm and the end of the second bending arm, an operator can drive the first bending arm and the second bending arm to slide so that the first bending arm and the second bending arm can be jointly matched to clamp the large shaft of the generator, and the four cladding plates can improve the clamping stability while grounding is achieved.

Description

technical field [0001] The invention relates to the technical field of generator shafts, in particular to a brush-braided generator shaft grounding device. Background technique [0002] At present, the grounding device used by generators is grounded by carbon brushes and large shaft springs. The carbon brushes are used to connect the grounding between the large shaft and the grounding end. Four grounding carbon brushes are arranged on the same axial surface, 2 A set of grounding carbon brushes, the specifications of the grounding carbon brush are: 8×20×32mm, the contact area between the grounding carbon brush and the large shaft is small (now the contact area is 8×20mm×4=640mm2), which is very easy to cause the carbon brush to be damaged. The brush box bounces, and the jitter damages the large shaft, causing high-order harmonic interference voltage, and even in severe cases, discharge corrosion and burns out the bearing seat; the four grounding carbon brushes are in contact ...

AI Technical Summary

Problems solved by technology

[0002] At present, the grounding device used by the generator is to use the carbon brush and the large shaft spring to press the grounding method. The carbon brush is used to connect the grounding connection between the large shaft and the grounding end, and 4 grounding carbon brushes are arranged on the same axial plane, 2 A grounding carbon brush is a group. The specification of the grounding carbon brush is: 8×20×32mm. The contact area between the grounding carbon brush and the large shaft is small (the contact area is 8×20mm×4=640mm2) The vibration in the brush box damages the large shaft, causing high-order harmonic interference voltage, and even produces discharge corrosion and burns the bearing seat in severe cases; when four grounding carbon brushes contact in the same dimension for a long time, the contact surface of the large shaft is no longer Smooth, strip grooves have appeared, so that the contact effect between the grounding carbon brush and the surface of the large shaft is not good, and it is easy to cause unsafe hazards such as ignition, jumping or even ring fire; due to jumping and vibration, the constant force compression spring is easy to break, Lead to poor contact of grounding carbon brushes, and a large amount of on-site maintenance

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