The Development Of Bushing Friction And Wear Tester

In high voltage circuit breaker arcing system,the bushing friction pair wears seriously.In order to study the wear regularity of joints,a bushing friction and wear tester are developed,and equipped with sealing system.This machine can be used to explore the wear regularity of materials in special gas atmosphere,it can also be used to explore materials of wear rules under air atmosphere.This paper first introduces the design method and rules of friction and wear testing machine,and the overall structure of the machine is designed.The friction pair part,driving system,loading system,sealing systems,measurement and control system are respectively designed.After that the scheme is compared,the final plan is determined after a lot of changes.The requirements of the experiment in the process of modification scheme are satisfied under the premise of the simplest structure,the optimal performance.In the final plan,the friction pair is fixed by a special fixture,it is convenient for rapid change.The high degree of automation and convenient loading of electromagnetic is selected to load the friction pair by a radial load.The electromagnetic design of load mechanism is described in detail.In order to make the decision the structure of electromagnet and the structure of loading mechanism are compared.The electromagnetic force is also calculated in detail,the method of formula,division of magnetic circuit and finite element simulation are respectively used,and finally three kinds of calculation results are compared.By comparing it can be found that the electromagnetic force calculated using the method of finite element simulation is similar to the actual results.In real production,the finite element simulation method for the electromagnet preliminary is designed,the electromagnetic is calculated,and then it is put into production,.