|
Rotary injection pump (referred to as rotary jet pump, also known as pitot pump) is a new type of ultra-low specific speed pump, a small flow, high head, QH curve flat, simple structure and characteristics of centrifugal pump speed than the average year-on-year efficiency of about 10-20% higher, are widely used in petrochemical, metallurgy, paper making, fire, and other industries. Study comprehensive enough depth, especially in the main flow passage components - less manifold and the rotor chamber, resulting in this type of pump efficiency is still relatively low, due to the late start of the domestic research for rotary jet pump is seldom used . Therefore, the research Churning pump flow rule has a significant theoretical value and a good prospect. The paper discusses in detail the principles, structure and design principle of a rotating jet pump, depth experimental research and numerical analysis of rotary jet pump has laid a solid theoretical foundation for us. Prototype rotary jet pump test our stringent specification requirements in accordance with the experimental design of the experimental program to obtain accurate experimental results and hydraulic performance curves to select reasonable test points provide a basis for the subsequent simulation. Text using Pro / ENGINEER to create solid models assembled rotary jet pump. CFX software, K-ε two equation turbulence model and SIMPLEC algorithm on the front runner Churning pump, manifold, and the speed of the rotor housing internal flow field numerical simulation of the internal flow field pressure field Churning through data calculated pump head, efficiency, shaft power and hydraulic performance data to improve spin optimization and development of the jet pump provides practical engineering guidance role. Compared through experimental and simulation data to prove that the use of the CFX simulation rotary jet pump is feasible, which laid the foundation for the following work. Three hydraulic model of the pump length composite S-type impeller single closed, single semi-open, double the performance of the semi-open numerical simulation, respectively, pressure, velocity, performance curves, analysis and comparison of available single closed better than the other two hydraulic model. Rectangular impeller, Churning composite S-type impeller pump using the same method on the basis of the single-closed hydraulic model, analog comparator, found: in the same flow, rectangular channel cross-section the Churning pump blade rotor chamber internal flow velocity rather set little difference of velocity in the flow tube, rectangular channel cross-section blade rotary jet pump the larger speed can be converted into pressure energy, which will be greater the pressure difference, that is, The higher the lift. Description rectangular impeller jet pump in more suitable spin.
|