摘要
为了得到安装空气室后工作缸的压力特性和管道的流量特性,根据往复泵非定常流动特点和空气室调节流量原理,建立了泵装置水力特性的仿真数学模型,用数值逼近法求二阶非线性方程组中压力解,提出了迭代计算中的收敛方法并利用计算机进行仿真实验。结果表明,泵启动后一段时间内,排液过程压力和流量曲线会呈现波动性,先突然升高至最大值,然后逐渐衰减并稳定在平均值,波动周期大于2π,吸液过程压力有可能先降低至最低值然后回升,波动幅值取决于泵转速n和空气室气体初始容积Vk0。压力和流量特性除有波动性外,还具有脉动性,其周期≤2π,由工作缸数决定,幅值大小也取决于n和Vk0。
Based on the pump＇s unsteady flow characteristic and adjustment flow rate principle of air chamber, a simulation model is established and run. The pressure solution for second order nonlinear equations is done by numerical approximation, and convergence method is proposed in iterative calculation. The result indicated that in the pump starting up period, the pressure and flow rate curve can present the undulation property. It suddenly elevates to the maximum value and then weakens gradually and stabilizes in the mean value. The undulation cycle is longer than 2π the imbibition＇s process pressure has the possibility to reduce to the minimum value and then rise, the peak-to-peak value is decided by pump rotational speed n and air chamber gas initial volume Vk0. The pressure and flow rate characteristic has not only the undulation property, but also the pulsation. Its cycle is less than or equal to 2π, decided by the number of work cylinder. And the peak-to-peak value is also decided by n and Vk0.
出处
《安徽理工大学学报（自然科学版）》
CAS
2006年第4期50-54,共5页
Journal of Anhui University of Science and Technology:Natural Science
关键词
往复泵装置
水力特性
空气室
计算机仿真
reciprocating pump-unit
hydraulic characteristics
air chamber
computer simulation
