The Research On The Characteristics Of The Double Acting Crabshaft With Large Five Crank Four Support

At present,the water injection power consumption accounts for about 60% of the total electricity consumption in oil field.High power centrifugal pump's efficiency is low,and reciprocating pumps have high efficiency but small power.So the development of high power reciprocating oil field water injection pump to provide energy saving and environmental protection equipment for oil field development has become a top priority,and has a very important significance for the sustainable development of the national economy.The five-cylinder and double acting reciprocating oil injection pump is a new generation of high power oil injection pump,its crankshaft as the key driving force components directly affect the reliability and the service life of the pump.Along with the increasing of the water injection pump power,the working condition of the crankshaft is also more severe.Therefore,in this paper,the strength and dynamic characteristics analysis are carried for the crankshaft of a large five-cylinder and double acting reciprocating oil field water injection pump.The study has great theoretical significance and engineering application value.This paper mainly uses the model 5S200D-266.6/10 water injection pump to carry on the simulation research,the main content of research is as follows:(1)Through the method of continuous beam stress analysis of double acting reciprocating pump crankshaft,this paper deduces the calculation formula of piston displacement and velocity,and introduces the stress characteristics of crankshaft.Using EXCEL and Origin to get the motion curve of the piston in the crankshaft system and the force curve on the crank.(2)With the use of SolidWorks and ADAMS,rigid crankshaft system is established and the dynastic simulation is carried.it is shown that simulation results coincide with the theoretical calculation;and the dynamic value of single and double acting loading and input torque is obtained.Also the research results show that 5S200D-266.6/10 oil injection pump five turn four support double acting crankshaft smooth operation.(3)By using the finite element analysis software ANSYS Workbench,this paper creates two finite element calculation models of the single and double acting crankshaft,which processes various finite element calculation,modal analysis,strength check,and comparison analysis separately,with above study,the change law of the stress distribution and vibration mode of the crankshaft under multiple working conditions,and the fatigue safety coefficient of the crankshaft are obtained,and the most dangerous working conditions of the crankshaft are found.(4)Do Finite element contact analysis of crankshaft by using ANSYS Workbench The stress and deformation of crankshaft under the condition of solid bearing support are obtained.And compared with the previous analysis.(5)According to the finite element analysis of double acting crankshaft strength analysis results and the most dangerous working conditions,without affecting the basic structure of crankshaft,the maximum stress is reduced,so that the crankshaft to optimize the best effect.Through heoretical analysis and simulation study on dynamic characteristics and strength of the five turn four supporting the dual role of the crankshaft,this paper reveals the dynamic stress and stress deformation at work in the double acting crankshaft,and provides technical support for the development of large efficient injection oil pump.