摘要
针对纯水支架液压系统管路设计时无明确的推荐流速问题,在分析管道液流流动特性的基础上,基于紊流水力光滑管提出了纯水液压系统管路极限流速计算模型,计算了不同管径紊流光滑管流动下的极限流速,给出了进液管路和回液管路的极限推荐流速,并以温升理论计算和仿真分析2种方法对其合理性及可行性进行了验证。研究结果表明:纯水在支架液压系统管路中的流动应保持在紊流水力光滑管状态,其进液管路极限推荐速度为8~10 m/s,回液管路极限推荐流速为5 m/s,通过理论计算和基于热流体的仿真分析表明管路每产生10 MPa的管路压力损失会形成约2.39℃的温升,这与油基液压系统的已有结论是吻合的,进而验证了水液压系统管路极限推荐流速的合理行和可行性。
Aiming at the problem that there is no clear recommended flow velocity in the pipeline design of the hydraulic system of pure water support, based on the analysis of the liquid flow characteristics of the pipeline, the calculation model of the limit flow velocity of the pipeline of pure water hydraulic system was proposed based on the turbulent hydraulic smooth pipe, the limit flow velocity of the turbulent smooth pipe with different pipe diameters was calculated, and the limit recommended flow velocity of the inlet pipeline and return pipeline was given. The rationality and feasibility were verified by theoretical calculation and simulation analysis of temperature rise. The research results show that the flow of pure water in the pipeline of the support hydraulic system should be maintained in the turbulent hydraulic smooth pipe state, and the limit recommended flow velocity of the inlet pipeline is 8~10 m/s, and the limit recommended flow velocity of the return pipeline is 5 m/s.Through theoretical calculation and simulation analysis based on thermal fluid, it is shown that the temperature rise of about 2.39 ℃ will be formed for every 10 MPa pipeline pressure loss. This is consistent with the existing conclusions of oil-based hydraulic system, and then verifies the rationality and feasibility of the recommended flow velocity in the pipeline of water hydraulic system.
作者
靳现平
Jin Xianping(Jinjie Coal Mine,Shendong Coal Group,Yulin 719319,China)
出处
《煤矿机械》
2022年第6期78-80,共3页
Coal Mine Machinery
关键词
纯水支架
管路
推荐流速
温升
pure water support
pipeline
recommended flow velocity
temperature rise
