Design Of Standby Load Conversion System For Intelligent Homogeneous Phase Multi-well Pumping Unit

This article takes the self-developed intelligent homogeneous phase multi well pumping unit as the research background.In order to solve a series of adverse effects caused by well group overload,single well failure,daily maintenance and other situations in the multi well pumping unit system,a backup load conversion system is proposed for this multi well pumping unit.The article first provides a detailed introduction to the design concept,overall structural composition,and functions of each part of the intelligent phase equalization multi well pumping unit system,and points out the application location of the backup load conversion system;Then,detailed design and research were conducted on the structure of the backup load conversion system according to functional requirements;Then the key structure of the device is analyzed by finite element statics and modal analysis;Based on the analysis results,the relevant structures were optimized and designed using the multi-objective size optimization module in ANSYS Workbench;Finally,the feasibility and reliability of the device principle were verified through prototype experiments.The main work and achievements of this article are as follows:(1)Introduce the structural composition of the backup load conversion system,elaborate in detail on the working principle of the backup load conversion process,and use Solidworks software to complete the design and modeling of the backup load conversion system structure.(2)The statics analysis of the key components of the standby load conversion system was completed through the Solidworks Simulation module,ensuring that the strength and stiffness of the core structure meet the design requirements.Then,modal analysis was conducted on the frame of the backup load conversion system,and the natural frequencies and vibration modes of the first six modes of the frame were obtained.Through analysis,the natural frequencies of the computer frame were much greater than the operating frequencies of the motors in the multi well system,ensuring that the system would not experience common vibration during operation.(3)Using the Design Exploration module in the finite element software ANSYS Workbench,multi-objective size optimization was carried out on the main structure of the overload protection device.The geometric dimensions that have a significant impact on the performance of the plate spring overload protection device shell were used as input parameters,and the maximum equivalent stress and minimum mass were used as constraints and optimization objectives for optimization.Compared with the values before and after optimization,the weight of the overload protection device shell decreased by 30.3% compared to before optimization,and the maximum equivalent stress still met the design requirements,achieving good optimization results.(4)The manufacturing of the test prototype was completed and the pressure holding test was carried out.The test results verified the feasibility of the overload protection principle of the standby load conversion system and the principle of single well failure without shutdown as well as the reliability in application,which provided the direction for further improvement and optimization and field application.