Research On Horizontal Vibration Of High Speed Elevator And Its Reduction Technology

With the continuous emergence of high-rise and super high-rise buildings,the elevator,as a kind of indispensable vehicle,is also developing towards high speed.The increase of running speed makes the elevator car more sensitive to external interference during running,and abnormal vibration is more likely to occur.It is found that the vibration response in the actual operation of the elevator is mainly vertical vibration and horizontal vibration,and the larger horizontal vibration will cause adverse reactions such as dizziness and vomiting,which will greatly reduce the comfort of taking the elevator.Therefore,restraining effectively the horizontal vibration of the elevator has become one of the key issues in the research field of high-speed elevator vibration.In this paper,for the purpose of suppressing horizontal vibration of high-speed elevator car,based on multi-body dynamics theory and similarity theory,combining virtual prototype technology and experimental research methods,the horizontal vibration of high-speed elevator car and its vibration reduction technology were studied.The research contents are as follows:The composition of the elevator system and the structural characteristics of the high-speed elevator were described,and the factors affecting the horizontal vibration of the high-speed elevator car were analyzed.The dynamic model of horizontal vibration of elevator coupling system with ordinary guide rail support was established.According to the dynamic model,the dynamic equation of elevator coupling system was established,and the solution method of the dynamic equation was analyzed.On this basis,based on virtual prototype technology,a simulation model of horizontal vibration of high-speed elevator with ordinary guide support was established.The simulation results show that: The vibration characteristics of the elevator car under noload,half-load and full-load conditions all meet the requirements of national standards,and the vibration of the elevator car under no-load condition is the most severe.Therefore,the following paper will carry out research based on the simulation model of the elevator under no-load condition.Considering the influence of guide rail vibration on the car vibration,a kind of vibration absorber guide support was designed.The strength of the vibration reduction guide support was checked through finite element analysis,which proves that the strength of the vibration absorber guide brackets is sufficient.The normal rail support in the above standard simulation model was replaced with the designed vibration reduction rail support,and the vibration reduction performance of the vibration reduction guide brackets was studied.The simulation results show that when the rubber stiffness and damping values are 1960N/mm and 0.77N·s/mm respectively,the maximum horizontal vibration acceleration and A95 value of the car are reduced by15.72% and 24.15% respectively compared with the simulation results of the ordinary guide rail bracket above,which effectively reduces the horizontal vibration of the elevator car and improves the ride comfort of passengers.Based on the similarity principle,the elevator horizontal vibration test system was designed.The horizontal vibration response of elevator car with common guide rail brackets was studied.The results and the simulation results were compared to verify the correctness of the simulation analysis.On this basis,the ordinary guide rail support was replaced by the vibration damping guide support in the horizontal vibration test system of elevator car,and the vibration damping performance of the vibration damping guide support was studied.The test results verify that the designed vibration absorber rail support has the ability to suppress the horizontal vibration of the elevator car.