POSITIVE-DISPLACEMENT PISTON PUMP AND ASSOCIATED DELIVERY CONTROL METHOD

摘要

The positive-displacement pump comprises a product-metering chamber (22), a metering piston (28) slideably mounted inside said chamber between a top dead centre and a bottom dead centre, a barrel (14) at least partially delimiting an intake chamber (16) and an exhaust chamber (18) for said product, and a distribution means (24) for the product mounted with the ability to move relative to the barrel and able to place the metering chamber alternately in communication with the intake chamber and with the exhaust chamber. The pump further comprises a measurement means (60) able to measure the pressure of the product inside the metering chamber (22) and a control unit (62) connected to the measurement means (60) and able to check the presence of pressure spikes of a magnitude greater than or equal to a predetermined pressure threshold magnitude.