Research On Optimization Of Key Components Of Hydraulic Transmission For Emergency Rescue And Troubleshooting Engineering Vehicles And Study On Shifting Rules

With the continuous development of society,human production activities have become widespread.In the production process,safety issues have always been the focus of attention,but in recent years,public safety incidents have occurred from time to time.At the same time,China is a country with a vast territory and extremely complex natural and geographical conditions.Natural disasters occur from time to time.Natural disasters and public safety emergencies have always attached great importance.The government continues to step up the establishment of an emergency rescue system.This year,the National People's Congress voted on the institutional reform plan of the State Council,established an emergency management department,and established the emergency management department.To a great extent,It has improved our ability to deal with natural disasters and public events.Our response has been more flexible and management has been more efficient.As an emergency rescue equipment manufacturing and manufacturing company,to continuously strengthen the investment in product research and development to meet the needs of emergency rescue work equipment under the new situation is not only an inevitable choice for the development of the enterprise,but also the social responsibility of the company.This paper studies the emergency rescue and troubleshooting The hydraulic transmission of engineering vehicles is one of the key components of the engineering vehicle.Optimizing the structure of the transmission and improving the performance of the transmission have greatly improved the mobility of the entire vehicle in response to the on-the-spot response.In this context,the research of the hydraulic transmission has The significance of this article is mainly to carry out the following research:First of all,without affecting the analysis results of the entire virtual prototyping,some partial structures in the transmission drive system,including hydraulic oil grooves and oil grooves on gear shafts,are neglected,and a three-dimensional modeling of the transmission drive system is quickly performed for subsequent computer simulation analysis.Provides the original model;deduces the vibration excitation of the gear transmission system at the same time,analyzes the excitation source and generating mechanism of the system,and constructs various mathematical models of the incentive,which lays a theoretical foundation for the subsequent computer simulation analysis of the virtual prototype.Secondly,based on the existing three-dimensional model and mathematical model,computer simulation work was carried out to investigate the problem of large vibration and unreasonable stress distribution on the gear surface of the gear transmission system,and to improve the tooth surface stress by using the method of repairing each gear of the transmission.The situation of irrational distribution and excessive transmission error is due to the fact that no definite modification theory has been proposed at home and abroad,mainly based on empirical formulas.Most companies pursue a single objective,that is,reduce transmission errors to reduce transmission system vibration.Because the gear eccentric load has a great influence on the life of the transmission system,this paper considers the two factors of transmission error and tooth surface stress to study the amount of modification of the gear system,and puts forward that the decision matrix method ultimately combines experience with both factors.The formula determines the amount of modification.Finally,after the shape of the gear transmission system is modified,the mechanical efficiency of the transmission is improved,and the optimal economic shift schedule is formulated on the basis of the mechanical efficiency of the transmission,which will improve the fuel economy of the engine.According to the relevant data provided by the engine manufacturer and the hydraulic transmission manufacturer,the driving force characteristic curve and the best fuel consumption curve of the construction vehicle are fitted to the driving force characteristic curve of the adjacent gear position and the same throttle opening degree respectively.The intersection of the best fuel consumption rate curve,the best power and economical shift points,the best power shift points and the best economic shift points are respectively connected,and the best shift law curve is finally obtained.The above-mentioned research process will provide reference for the optimization or replacement process of enterprise products,and provide theoretical guidance for the modification of the gear transmission system of the enterprise.