The invention discloses a series
hydraulic pressure pulsation attenuator and an attenuation method. The series
hydraulic pressure pulsation attenuator comprises a
piston rod, a
piston and an attenuator shell body; the
piston rod is fixed to the attenuator shell body, one end of the
piston rod is located in the attenuator shell body, and the other end of the
piston rod penetrates out of the attenuator shell body; a through hole is formed in the
piston rod in the axis direction and communicates with a follow-up oil line; the piston is located in the attenuator shell body, and a piezoelectric
ceramic is arranged between the piston and the attenuator shell body and makes contact with the piston; the rigidity of the piezoelectric
ceramic is changed by changing
voltage applied to the two ends of the piezoelectric
ceramic according to the magnitude of the pressure pulsation, and accordingly piston displacement is changed; and high-frequency change of the volume of the attenuator shell body and attenuation of the
hydraulic pressure pulsation are achieved. According to the novel series hydraulic pressure pulsation attenuator, compared with a traditional hydraulic pressure pulsation attenuator, the oil line
energy loss caused by the series hydraulic pressure pulsation attenuator is small, the bandwidth of the pressure pulsation playing an inhibition effect is increased, and the pressure pulsation in a high-pressure oil line can be inhibited.