Shaft Voltage Grounding

Types of Brushes

Type L Brushes

The Type L Brush is a shaft riding brush with roughly the shape of a toothbrush. It is widely used for all kinds of machinery including steam and gas turbines up to about 50 MW rating and higher. It is available in numerous lengths, sizes are as follows:
  1. 10L
  2. 12.5L
  3. 15L
  4. 17.5L
  5. 20L
  • Sohre turbo machinery® inc. Type-l brush (with replaceable bristle element). Top view. Optional mounting flange is not shown.

  • Sohre turbomachinery® inc. Type-l brush (with replaceable bristle element).Side view. Optional mounting flange is not shown.

  • Sohre turbomachinery® inc. Type-l brush. Partially withdrawn cartridge. Cartridge can be withdrawn for maintenance while unit is in operation.

  • Sohre turbomachinery® inc. Type-l brush inserts.Shown in new and also in depleted condition.

  • Type S Brushes

    The Type S Brush is a shaft riding brush similar to the Type L brush but smaller. It too is widely used for all kinds of machinery including steam and gas turbines up to approximately 25 MW rating. It is available in numerous lengths, sizes are as follows:
    1. 6.35 S
    2. 7.5 S
    3. 9.0 S
    4. 10.5 S
    5. 12.0 S
  • Sohre turbomachinery® inc. Type-s brush (with replaceable bristle element).Top view. Optional mounting flange is not shown.

  • Sohre turbomachinery® inc. Type-s brush (with replaceable bristle element).Side view. Optional mounting flange is not shown.

  • Sohre turbomachinery® inc. Type-s brush bristle element (new and depleted).

  • Type A Brushes

    The Type A Brush is a "plunger" type brush. It is especially suitable for applications where access to the rotating shaft is limited such as when retrofitting an existing machine with a brush. These brushes are suitable for equipment up to approximately 25 MW. Type "A" brushes are available in numerous lengths, sizes are as follows:
    1. 6.0 A
    2. 8.5 A
    3. 11.0 A
    4. 13.5 A
    5. 16.0 A
  • Sohre turbomachinery® inc. Type-a brush (with replaceable bristle element).Top view. Optional mounting flange is not shown.

  • Sohre turbomachinery® inc. Type-a brush (with replaceable bristle element).Side view. Optional mounting flange is not shown.

  • Sohre turbomachinery® inc. Type-a brush bristle elements.Shown in new and also in depleted condition.

  • Type LW Brushes

    The Type LW Brush is a shaft riding brush similar to the Type L and Type S brushes but substantially larger. It is intended for large power station turbines up to 500 MW and higher rating or where large shaft currents have to be grounded. Type LW brushes are also used for propeller shaft grounding on large ships.
  • Sohre turbomachinery® inc. Type-lw brush.Side view. Optional mounting flange is shown.

  • Sohre turbomachinery® inc. Type-lw brush (shown with replaceable bristle element).

  • Sohre turbomachinery® inc. Type-lw brush.Internal cartridge assembly is shown partially withdrawn.

  • Sohre turbomachinery® inc. Type-lw brush bristle element.Side view. Bristle element is designed to be replaceable while brush is in service.

  • Sohre turbomachinery® inc. Type-lw brush bristle element.Depleted bristle element. Bristle element is designed to be replaceable while brush is in service.