FLOW REGULATING DEVICE FOR A ROTARY PISTON PUMP

摘要

The flow regulating device of a rotary piston pump intended to regulate a useful flow comprises a by-pass flow regulation valve. The viscosity-dependent regulation is obtained because the cross-section of the flow passage through the choke is reduced with respect to that of the choke surface wetted by the oil flow provided to a consumer. A diaphragm (17) is arranged upstream of the choke (21), thereby providing for an early regulation of the circulated flow during low temperatures and the circulation of a larger amount of oil transported in the pump. Undesirable noises are suppressed.