Pressure pulsation attenuation device integrated in plunger pump and capable of adjusting attenuation frequency

Abstract

The invention discloses a pressure pulsation attenuation device integrated in a plunger pump and capable of adjusting the attenuation frequency. A sleeve is arranged outside the plunger pump. An upper damping fin with a hole and a lower damping fin with a hole are fixed in the sleeve. A cavity in the sleeve is divided by the upper damping fin with the hole and the lower damping fin with the hole into an oil drainage buffer cavity, an upper buffer cavity and a lower buffer cavity. A sleeve port at the position of the upper buffer cavity is connected with an upper adjusting nut. A sleeve port at the position of the lower buffer cavity is connected with a lower adjusting nut. The portions, between the two ends of an oil suction groove and an oil drainage groove, of a thrust plate are provided with an upper dead center damping hole and a lower dead center damping hole correspondingly, the upper dead center damping hole and the lower dead center damping hole communicate with the upper buffer cavity and the lower buffer cavity through an upper thin pipe and a lower thin pipe correspondingly, and an oil outlet is connected with the oil drainage buffer cavity through an oil drainage thin pipe. The inherent flow refill amplitude of the plunger pump can be effectively attenuated, the pulsation amplitude of pump high-pressure oil drainage pressure is effectively attenuated, and the attenuation frequency is adjustable. The pressure pulsation attenuation device can be integrated in a shell of the plunger pump and is applicable to various hydraulic plunger pumps.

Description

technical field [0001] The invention relates to a pressure pulsation attenuator, in particular to a pressure pulsation attenuation device with adjustable attenuation frequency integrated in a plunger pump, which belongs to the technical field of fluid transmission and control. Background technique [0002] Fluid mechanical systems generally have flow pulsation and pressure pulsation, for example, the pump source of the hydraulic system causes the flow pulsation of the pipeline, the water hammer phenomenon of valve opening and closing, etc. These flow and pressure pulsations not only affect the proper operation of the system, but also degrade the performance of the system. If the pulsation induces large pipeline vibration, it will reduce the life of the pipeline and hydraulic components. In severe cases, it will even cause the rupture of the pipeline wall, the damage of the pipeline support structure, the decrease of the support stiffness, the failure of the pipeline system, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of the pressure pulsation of the hydraulic pump source and the problem that the traditional pulsation attenuator with fixed attenuation frequency cannot effectively attenuate the pressure pulsation with changing frequency, and specially provides an adjustable attenuation frequency integrated in the plunger pump The pressure pulsation attenuator can efficiently attenuate the pressure pulsation amplitude output by the plunger pump, and can adjust the attenuation frequency according to the piston pump speed to maximize the pulsation attenuation effect in a wide frequency band

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