In large power generation units such as 300MW, 600MW, and 1000MW, the brush gear plays a crucial role. The main responsibility of this component is to support and fix the brushes, which is crucial for ensuring the stability of the generator carbon brush operation and extending its service life. In large generators, the design and maintenance of the brush gear are crucial to ensure good electrical contact between the brush and rotating components such as the rotor.

The generator brush gear has multiple functions, including:

• -Ensure that the carbon brushes remain in the correct position on the high-speed rotating rotor to achieve stable electrical connections.
• -Provide necessary pressure between the brush and rotor surface to maintain necessary electrical contact and brush grip stability.
• -The brush gear is usually designed with a heat dissipation channel to facilitate the timely dissipation of heat generated by the brush and prevent the brush from overheating.
• -Reduce impact and noise caused by rotor vibration or relative motion between brushes and brush holders.
• -Make the installation, replacement, and inspection of brushes more convenient for maintenance work.

The structure of the generator brush gear assembly consists of multiple key parts, each with its unique function and importance:

• -Brush holder: As the core part of the brush holder, the brush holder is responsible for fixing and supporting the brush. It is made of wear-resistant and conductive materials to ensure good contact between the brush and the brush holder.
• -Brush guide plate: The function of the brush guide plate is to guide the brush to run smoothly on the rotor, made of high hardness and wear-resistant materials to withstand the wear and tear of the brush during operation.
• -Brush gear body: The body is the main structure of the brush gear , used to support and fix the brush holders and brush guide plate. It is made of high-strength and corrosion-resistant materials to withstand various loads and environmental factors during generator operation.
• -Heat dissipation channel: The heat dissipation channel is an important design feature of the brush gear, used to guide the heat generated by the brush to dissipate in a timely manner and prevent the brush from overheating.
• -Fasteners: Fasteners are used to fix the brush gear and the body, ensuring the stability and safety of the entire brush gear structure. The selection and installation of fasteners should consider the load and vibration they bear to ensure that they do not loosen during generator operation.
• -Insulation material: Insulation material is used to isolate the brush holders and brush guide plate, preventing electrical short circuits and leakage. The selection of insulation materials should consider their voltage resistance, heat resistance, and corrosion resistance.
• -Protective cover: The function of a protective cover is to protect the brush gear and brush from the invasion of dust, moisture, and other external pollutants, usually made of fiberglass.

It can be seen that the design and maintenance of the brush gear are key to ensuring the normal operation of the generator carbon brushes. By carefully designing the brush holder, good electrical contact between the brush and rotating parts can be ensured, while reducing the risk of wear and failure, thereby extending the service life of the equipment.

Forced-draft blower Single row slotted ball bearing DTYD60LG019
Coal mill Loading cylinder seals MG08.11.14.02
Generator Shaft sleeve
Generator rubber gasket
Induced draft fan Assembly Servomotor for Booster Fan SFG305X272D228
Booster pump Drive end inner shaft sleeve FA1D56-01-05
Steam turbine Front Casing
Steam turbine ICV spring housing assembly
Induced draft fan Main Shaft TU790102 TU790100SMZY
Coal mill Upper pull rod MG33.11.17.89
Generator Sealing plate
Steam turbine elastic washer
Generator Cleaning agent
Steam turbine Regulating Pre-inlet Valve Cover
Generator Airside sealing tile
Steam turbine Tube male screw connector