| The oil drilling rig is an important petroleum production equipment.The winch is an important part of the oil drilling rig.Its structure and performance have an important impact on the efficient and reliable operation of the drilling rig.This paper introduces the structural composition,working principle and working condition of the oil rig winch,analyzes the load characteristics and dynamic characteristics,and points out the basic performance requirements of the driving equipment.The composition,principle and characteristics of the winch drive scheme are discussed,and a new drive scheme is proposed with the aim of improving the transmission efficiency and simplifying the structure.According to the speed regulation performance and technical requirements of the AC variable frequency motor,the dynamic parameters under the new scheme are matched,and the speed regulation performance and technical requirements of the AC variable frequency motor are given.Finally,the basic parameters are summarized and The advantages of automatic drilling,transmission efficiency,motion transmission,power utilization,etc.are compared,and the conclusion of the new scheme due to the original transmission scheme is obtained.According to the empirical formula,the key components of the winch are designed: the drum and the drum shaft.The static strength calculation and vibration evaluation of the drum are carried out by the finite element method.The stress,deformation and vibration mode distribution cloud map are obtained,and then the strength is evaluated and the dynamics is obtained.The analysis laid the foundation.Based on the introduction of the basic content of structural optimization and ANSYS parameter optimization and topology optimization methods,the single-objective parameters of statics are optimized.Under the premise that the stress increases by about 10% and the safety factor meets the requirements,the weight can be reduced by about 37.%;Based on modal analysis,the single-objective parameters of vibration are optimized.The first-order natural frequency of the optimization result is increased by about 32%.It is farther away from the first-order resonance point,and the possibility and amplitude of vibration will be suppressed.Based on statics and mode State analysis performed multi-objective parameter optimization.Under the premise of stress increase of about 12% and still meeting safety requirements,the weight can be reduced by about 18%,and the first-order natural frequency is increased by about 30%.At the same time,the parameter sensitivity analysis is carried out in the single target and multi-objective optimization process,and the parameter sensitivity histogram is given to determine which are the key parameters and which are the secondary parameters,so that the number of parameters can be effectively reduced and the experiment can be carried out efficiently.design.The paper also optimizes the topography of the roller side,and details the model simplification,load application,result analysis,model correction and topology verification.It has guiding significance for the structural design of the drum.This paper has practical significance and positive promotion for improving winch structure and improving winch performance. |
