METHOD OF AND PUMPING UNIT FOR COMPENSATING FLOW RATE PULSATIONS OF DISPLACEMENT PUMP Russian patent published in 1998 - IPC

FIELD: mechanical engineering; pumps; flow rate pulsation compensating in suction and discharge channels of controlled and noncontrolled displacement pumps with any number of operating chambers. SUBSTANCE: displacement members 5 of flow rate compensator 4 of pump 1 are set into motion simultaneously with pump 1 through drive 8 connected with drive shaft 10 of pump 1 by synchronizing kinematic coupling 9. Gear ratios of drive 8 for each displacement member 5 as a function of turning angle of drive shaft 10 of pump 1 are made to comply with results of calculation depending of adopted version. Movement of displacement members 5 in compensating chambers 6 synchronized with operation of pump 1 provides forming of pulsating liquid flows in channels 7 of compensating chambers 6 created by periodically taking off liquid from delivery channel 3 of pump 1 and returning it into the same channel 3 and forming, in combination, the flow with correcting rate changing in antiphase relative to pulsating component of flow rate at outlet of pump 1. According to preset gear ratio realized by drive 8 value of correcting flow rate in each moment of time (at each angle of turning of drive shaft 10 of pump 1), with tolerable error, is formed equal to difference between designed values of mean and instant flow rate of pump 1 and, in particular case, equal to sum of characterized by maximum values of amplitudes of harmonic components of expansion into series of dependence of difference between designed values of mean and instant flow rates of pump 1 from angle of turning of drive shaft 10 of pump 1. Thanks to it flow rate pulsation on section of channel 3 after connection of channels 7 of device 4 is reduced to preset tolerable limit (complete elimination of pulsation is practically possible) at preservation of corrected flow rate of pumping unit at level of mean flow rate of pump 1. EFFECT: enlarged operating capabilities. 24 cl, 2 dwg