基于ADAMS的压裂车三缸泵振动分析

针对压裂车作业时三缸泵对车架的激励不明确问题,对压裂车三缸泵的振动特性进行了研究.首先通过建模软件Pro/E建立了三缸泵的三维实体模型,然后导入了多刚体动力学软件ADAMS,建立了其虚拟样机模型,综合考虑三缸泵多档位工作时的惯性力和液力端压力波动等激励源,添加了相应的连接、约束、驱动及激励条件,仿真得出了压裂车在工作时三缸泵对车架的横向激励,最后通过整车虚拟样机试验和现场试验对其进行了验证.研究结果表明,三缸泵对车架的激励主要为低频激励,激励峰值为2.3×106 N,出现在5.3 Hz;仿真结果能够真实反映压裂车实际工况的激励值,为压裂车三缸泵隔振方案的设计提供了理论基础.

Vibration analysis of triplex pump installed on the fracturing truck based on ADAMS

Aiming at the problem that the excitation loaded on the frame caused by the triplex pump when the fracturing truck operates was unclear, special studies on the vibration characteristics of the triplex pump was carried out. Firstly, the 3D solid model of the triplex pump was set up by the modeling software Pro/E, and then rigid multi-body dynamics software ADAMS was imported and a virtual prototype model was built up. Excitation sources were considered comprehensively slvely, such as inertial forces caused by multi-gear operation of the triplex pump and pressure surges on the fluid end, and relevant joint conditions, constraint conditions, driving and excitation conditions were added. In this way, the stimulate horizontal excitation that frame made on triplex pump when the fracturing truck worked was gained, which also could be proven by virtual prototype test and field test. The result indicated that the excitation applied on the frame by the triplex pump mainly was low frequency（LF） excita- tion. The peak value 2.3 × 10^6 N appeared at 5.3 Hz. The simulation results can faithfully reflect the excitation values when the fracturing truck worked under actual conditions, providing theory basis on the design of vibration isolation scheme of the triplex pump of the fracturing truck.