Coupling Analysis And Parameter Optimization Of Transmission System And Distribution System Of Emulsion

The emulsion pump is the power source for the hydraulic support and other hydraulic drive devices in the coal mining face of the coal mine.Its working performance directly affects the reliability operation of the hydraulic support and the whole fully mechanized mining equipment.In recent years,with the development of high-yield and high-efficiency fully mechanized mining technology,it is required that the emulsion pumping station can provide higher working pressure and larger liquid supply flow rate,resulting in an increase in the structural size of the pump and limited roadway space in the underground working face.Under the conditions,this brings great difficulties to the installation and placement of the mobile pumping station system.Therefore,the optimization of the performance and structural parameters of the emulsion pump have a certain guiding effect on the design of the emulsion product.In this paper,RBW315/31.5 type mineral emulsion pump is used as the physical object of research.Firstly,according to the transmission and distribution principle of the reciprocating plunger pump,the factors affecting the hydraulic end performance of the emulsion pump were analyzed,and the mathematical model of the volume loss of the emulsion pump was established.The hydraulics of the emulsion pump system were analyzed by AMESim system simulation software.The relationship between the factors and the volumetric efficiency is achieved.The results show that the crankshaft speed,the suction and discharge valve spring stiffness,the suction and discharge valve spool quality,and the spool opening have a direct impact on the volumetric efficiency.Research and analysis show that there is an inflection point threshold for the crankshaft speed.When the speed is higher than this value,the volumetric efficiency will decrease.The frequency response analysis of the distribution system of the emulsion pump was carried out by the frequency response method,and the cutoff frequency of the frequency response was determined.The cutoff frequency is the inflection point threshold.The distribution system can increase the bandwidth of the distribution system by increasing the bandwidth of the distribution system without surge.Through the simulation analysis of the pump single plunger distribution process,the bandwidth of the distribution system is proportionate to the spring stiffness of the suction and discharge valve,and inversely proportional to the mass of the suction and discharge valve core.The multi-factor parameters were optimized by orthogonal test design.The influence factors of various factors on the characteristics of liquid absorption and drainage of the distribution system were analyzed by the range analysis method and variance analysis method of orthogonal test.The optimal combination scheme of each factor was determined.Simulation experiments show that the volumetric efficiency of the optimized solution is improved by about 4%,and the volumetric efficiency of the emulsion pump is improved significantly.