Force Control: oil shear clutch brake manufacturer

Posidyne® clutch/brakes transmit torque by shearing automatic transmission fluid between multiple friction discs. The fluid absorbs the heat of engagement and dissipates it through the housing. The recirculating fluid minimizes wear, resulting in exceptionally long service life. Oil-shear operation provides a controllable, cushioned engagement that is smoother, quieter and more accurate than dry friction units.

oil shear clutch brake

The Force Control Recirculation System Puts the Fluid
"Where it's needed — When it's Needed"

Fluid Flow Through a Clutch, Brake Engaged When the clutch input shaft begins to rotate, fluid resting inside the hollow barrel of the clutch is drawn out through radially extending passages by the centrifugal force of the rotating drive plates. The natural level of the fluid supply inside the unit housing replenishes the fluid drawn out of the hub barrel. Recirculation is established. The brake hub, like the clutch hub on the rotating output shaft pumps fluid through the radially extending passages to the I.D. of the brake stack. Centrifugal force of the rotating hub and friction discs causes the fluid to flow through the brake stack providing cooled fluid to the friction surfaces. Fluid flow is established in preparation for brake engagement.

The fluid flowing across the friction surfaces carries the heat of engagement to the sump for radiation through the housing or a heat exchanger. Cooled fluid is returned.