Pump assembly, suppression apparatus for use with a pump, and method of controlling a pump assembly
View Patent ↗A pump assembly comprising an apparatus for reducing process noise manifest in a piping system. The invention introduces a pump pulse to counteract a negative dip in pressure when the reciprocating pump is at the completion of each pump stroke.
1. A method of controlling a reciprocating pump assembly and a noise cancellation system coupled to the reciprocating pump assembly, the reciprocating pump assembly comprising a fluid suction, a reciprocation member, and a fluid discharge, the method comprising: acquiring a first signal having a relation to the excursion of the reciprocating member; producing a second signal during each excursion of the reciprocating member; delivering a defined volume of fluid to the fluid discharge based on the second signal, wherein producing the second signal comprises approximating the expected noise of the reciprocating pump assembly and outputting a cancellation signal, wherein the cancellation signal is based upon the expected noise and phase-shifted from the expected noise, wherein the cancellation signal substantially cancels out the second signal.
2. A method as set forth in claim 1 wherein the reciprocating pump comprises a double-diaphragm, reciprocating pump, and wherein the reciprocating member comprises a connecting rod coupling a first diaphragm to a second diaphragm.
3. A method as set forth in claim 1 wherein the noise cancellation system comprises a solenoid and a pulse pump coupled to the solenoid, and wherein delivering a defined volume of fluid to the fluid discharge comprises controlling an air supply to the pulse pump based on the second signal, and delivering the defined volume of fluid in response to the controlling of the air supply to the pulse pump.
4. A method as set forth in claim 1 wherein the first signal is a signal having a relation to the position of the reciprocating member.
5. A method as set forth in claim 1 wherein the first signal is representative of a pumping rate of the reciprocating pump assembly.
6. A method of controlling a reciprocating pump assembly and a noise cancellation system coupled to the reciprocating pump assembly, the reciprocating pump assembly comprising a fluid suction, a reciprocation member, and a fluid discharge, the method comprising: acquiring a first signal based upon the excursion of the reciprocating member; producing a second signal during each excursion of the reciprocating member; delivering a defined volume of fluid to the fluid discharge based on the second signal, wherein producing the second signal comprises modeling a noise of the reciprocating pump assembly, filtering the modeled noise, and outputting a cancellation signal based upon the filtered noise, wherein the cancellation signal substantially cancels out the second signal.
7. A method as set forth in claim 6 and further comprising acquiring a pressure having a relation to the discharged fluid, and wherein producing the second signal further comprises determining an error based on the acquired pressure, and adapting the filter based on the error.