| Force Controls Brakes & Controls for the Drilling Industry |
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| 3000 HP Drawworks Brake precision control Full Range "0-100%" +/- .001Tol. 100% Tq. - "0" RPM |
The Positorq brakes use multiple disc oil shear technology with a continual supply of
cooling and lubricating fluid like all other Force Control units. The main difference is that the
Positorq Brake is a constant slip device. It is normally force lubricated for smooth accurate
torque control over the entire speed range, even to 0 RPM. Tension torque is transmitted
through the viscous shear of the fluid between the friction surfaces.
Torque is proportional to air or hydraulic pressure supplied to the piston. Teflon piston
liners produce smooth controllable piston movement for precise control and quick brake
response.
Tension and dynamometer brakes are essentially energy absorbers. Rotary motion is
transformed through the brake to heat, so a critical function of the brake is its ability to
dissipate heat. In the Positorq brake, fluid is pumped through the brake shaft to furnish a
continuous supply of fluid between the friction surfaces. The fluid lubricates the surfaces at
the point of engagement, and removes engagement heat. The fluid is then circulated
through a cooling unit and cooled fluid is returned to the Positorq brake.
cooling and lubricating fluid like all other Force Control units. The main difference is that the
Positorq Brake is a constant slip device. It is normally force lubricated for smooth accurate
torque control over the entire speed range, even to 0 RPM. Tension torque is transmitted
through the viscous shear of the fluid between the friction surfaces.
Torque is proportional to air or hydraulic pressure supplied to the piston. Teflon piston
liners produce smooth controllable piston movement for precise control and quick brake
response.
Tension and dynamometer brakes are essentially energy absorbers. Rotary motion is
transformed through the brake to heat, so a critical function of the brake is its ability to
dissipate heat. In the Positorq brake, fluid is pumped through the brake shaft to furnish a
continuous supply of fluid between the friction surfaces. The fluid lubricates the surfaces at
the point of engagement, and removes engagement heat. The fluid is then circulated
through a cooling unit and cooled fluid is returned to the Positorq brake.
Offshore Source China Ltd.
