Structural Analysis And Vibration Research Of A New Type Of Elevator

With the increase of reno,vation projects of old buildings,the emergence of villa real estate enterprises and people's pursuit of convenient life,lifting equipment has become more and more important.Common lifting equipment exists in the use of limited scope,poor reliability,operation and maintenance costs,high cost,installation is not convenient and so on.In view of these problems,this paper proposes to develop a new type of household lift as a research object based on an enterprise project.The specific research work of the thesis is as follows:1)This paper studies the characteristics of the overall layout of traditional elevators,lefts and the installation space required for their civil engineering,designs a new type of elevator on the premise of maximizing the space utilization rate and reducing the required shaft space,and finally realizes the rational layout of the design of bottomless pit and no machine room.2)Solid-works is used to build three-dimensional model of lifting parts and components to ensure the accuracy and universality of the parameterization of complex parts.The whole model is assembled to realize the simplicity,rapidity and accuracy of prototype modeling.It lays a foundation for upgrading and reconstruction,and completes interference checking to ensure the size of parts and components is accurate and reasonable.The final design realizes the manual release and safe landing function of the new elevator.3)Carry out theoretical calculations on the critical system of the elevator and complete the static mechanical analysis to ensure that the structure of the elevator is reliable and stable.And it is used as the basis for the subsequent dynamic performance analysis(such as the analysis of the guide rails for lifts-T-type ensures that its the degree of bending is within the scope of the standard specification,otherwise it will cause strong vibration).4)The dynamic analysis model of the lift is established,and the dynamic analysis of the lift car frame is carried out.The first six natural frequencies are compared with the excitation frequencies,and the running speed of the car is calculated to avoid the resonance zone.Dynamic simulation of the whole model is carried out to complete its modal analysis with the load and position change of the car,the relationship between the mode of vibration and its changing working conditions is obtained,and it is judged whether it is within the sensitivity range of the human body to the frequency.The sinusoidal and step load are applied to the guide rails for lifts-T-type under different working conditions to complete the harmonic response and transient analysis.The corresponding curves of vibration acceleration and displacement in the horizontal direction of the car are obtained.The amplitude of the guide rail is compared with the standard technical specifications to determine whether it is beyond the prescribed range.Combined with the dynamic simulation results,the measures of car vibration reduction are proposed.The method of optimizing the structure by changing the rolling guide boots and adding the spring shock absorber is adopted,and the dynamic simulation is completed again.The results show that the vibration acceleration is significantly reduced,which verifies the rationality of the vibration reduction measures.