Lifting And Adjusting Device Multi-rope Friction Hoist

Multi-rope friction hoist has become a main way in modern mine transportation because of various advantages,which makes the first rope maintenance of multi-rope friction hoist becomes crucial.The first rope will produce the plastic elongation in the first loading or run with big load for a long time,thereby the two cage can not in place at the same time,which influences the transport efficiency of elevator seriously and reduces transportation volume.Although there are a number of adjustment technology and adjustment process according to this problem,in terms of actual application,these problems still exit,such as the limited clamping and lifting ability,strong dependence to hoisting conveyance,the complicated adjustive process and limited regulating variable.The paper takes the four line for example and research the defects of the existing adjusting technology.Realizing the whole control system in place and offline quickly by the method of upper and lower bearing beam alternating load.Clamping device exerted pretightening to wedge block using self-locking wedge block principle and the lever principle,upper and lower two sets of clamping device containing eight clamping apparatus realizes the continuous operation.Choosing the single rope adjustment process,dual the rope adjustment process or four rope adjustment process(ie lifting)according to the actual situation implements the flexibility and diversity of rope adjusting process.The hydraulic system control and electric control system control achieve the lifting and adjusting action under different process.In order to more vivid to show the overall structure of the device and analyze the main stressed components,the three-dimensional model of the machine is established by using Solidworks2007.The stress analysis and the static simulation about the main board of the clamping device and the bearing beam are carried by using ANSYS WORKBENCH module.After analyzing the simulation results,the weak links are redesigned and improved.Eventually the maximum stress is reduced and the minimum safety coefficient is improved,good improvement effect is obtained.The structure of under bearing beam is optimized by using multi-objective parameter optimization module of ANSYS WORKBENCH,which ensure its bearing capacity and reduce the mass.In order to research dynamic characteristics of clamping device further more,a comparative analysis of dynamic characteristic of the clamping device in different load conditions and different pre-tightening force system is conduced.The clamping force of clamping device is verified,and the parameters of influencing the clamping properties are obtained.Further the system kinematics simulation analysis verified coordination of the motion and the rationality of the design.At last,the industrial test further verify the clamping capacity of the clamping device and test kinematics and dynamics simulation results.The field use results show that the device design is reasonable.The device can solve the deficiencies of the existing technology,meet the needs of the field application.