Study On Mechanical Properties Of Instantaneous Safety Gear Of 24 T Freight Elevator

With the rapid development of the national economy,the demand for the super high speed and large load lift is increasing in many industries.As one of the most important safety devices,the safety clamp is made to stop the car and clamp on the guide rail when the elevator speed,broken rope and other very serious fault.It plays an important role in preventing accidental injury.In the aspect of stopping and reducing speed,the safety clamp are divided into instantaneous safety clamp and progressive safety clamp.The main characteristic of the instantaneous safety clamp is that the braking element is rigid,and the braking system is short,and the braking element is short.In the process of safety gear to stop the car under the very big impact,the clamping element and guide surface will have a serious injury.Therefore,it is necessary to put forward higher requirements for the structure design of the safety clamp for the large load lift.In this paper,the mechanical properties of large tonnage cargo ladder safety clamp is studied,in order to provide a reference for the structure optimization and design of the super heavy load cargo ladder safety clamp.According to the above objectives,the static finite element analysis model of the safety clamp is established according to the type test of the 24 t cargo elevator safety clamp.The finite element analysis model is verified by comparing the results of finite element analysis with the model test results.Taking into account the type test and can not fully reflect the actual braking of the safety clamp,a dynamic analysis model is established to analyze the mechanical properties of the clamp in the actual braking process.And through the comparison of the energy,the model analysis process can get a reasonable response.By changing the structure and parameters of the model,the influence of different structures and parameters on the mechanical properties of the clamp was studied.For the static analysis model of the safety clamp,the increase of the rib plate can make the safety clamp obtain higher mechanical properties under the condition of less safety clamp quality.For the dynamic analysis model of the safety clamp,the reinforcement plate,the length of the bearing block and the wedge angle has great influence on the maximum displacement of the U₂ direction of the clamp body,and the wedge angle has great influence on the maximum displacement of the U₁direction.The research content of this paper is mainly about the safety clamp of 24 t,which can lay the foundation for the optimization of the existing product structure and the development of the design theory of the heavy haul freight in our country.