Research On The Membrane Fluid Pulsation Attenuator

In the hydraulic system，As the hydraulic pump working principle is the use ofvolume change, alternately discharge the hydraulic oil, the output of the instantaneousflow is a periodic pulsating flow. After this pulsating flow encountered systemimpedance the periodic pressure pulsation was produced. And the pressure pulsationresulting in vibration and noise in the hydraulic system, as spread along the pipeline,The inhibition of the hydraulic system pressure pulsation is of great significance toimprove system reliability、quality of work、the life of hydraulic components andreduce system noise. Pulsating flow Inhibition of the hydraulic system has been awell-settled technical problems. The pulsation attenuator has a good effect to attenuatethe pulsating flow in the hydraulic system. The paper presents a simple, smartmechanical resonant structure-the membrane fluid pulsation attenuator. The specificstudies include:1. A membrane fluid pulsation attenuator structure was proposed in this paper.Based on the mechanism of dynamic vibration absorber, a simple, smart mechanicalresonant structure is designed.2. The vibration model of the pre-stretching membrane is established, and thenatural frequency of the flexible membrane is solved. Using finite element softwareADINA, the paper analyzed the fluid-structure interaction frequency of the membrane.The dynamic characteristics of fluid-structure interaction of membrane is studied, Theanalysis result provide a basis for the pulsation attenuator design.3. The fluid-structure interaction simulation model is presented, which is used forthe attenuation characteristics simulation of the pulsation attenuator. The model ofpulsation attenuator is simplified. The setting of the simulation parameters arecompleted. Taking the transient dynamics analysis as the principal means, the paperanalyzes the frequency characteristics and attenuation characteristics of the pulsationattenuator.4.The test rig of the pressure pulsation attenuator is designed,and the prototype isalso developed. The attenuation characteristics of membrane fluid pulsation attenuatoris tested in the test rig.