Algorithm for Calculation of Damping Cap for Piston Pump

The paper presents a mathematical model of cap-damper of pressure oscillations in piston pumps and its approbation on practical calculations. The aim of the study is the theoretical justification of the rationale for the cap- damper of pressure fluctuations calculation in the given conditions. It is shown that two previously known methods of cap- dampers calculation do not satisfy the conditions of the practice. By analyzing the transfer function of the cap as the converter (attenuator) of signal, the ratio was obtained, which allows to calculate the structural characteristics of the cap- damper on the desired degree of pressure reduction. Calculations under the terms of industrial and power pumps were carried out. The resulting expression allows you to evaluate the size of the cap-damper taking into consideration the properties of gas and structural conditions at the outlet of the absorber. It is shown that the effectiveness of the cap-damper does not depend on the pump operation mode. The design of the cap-damper calculated on the proposed method has a lower metal content than the conventional constructions.