Electric chain hoist load and mode of action

wire rope hoist loads Meaning is electric chain hoist in the job, load bearing species complex loads in a different direction, not only in running electric chain hoist should be included static load, dynamic load, alternating loads, etc. The role of various loads, and with electric chain hoist operation conditions change, even if the load is also shown similar characteristics varied. Subject to the  Hoist equipment  of the load bearing parts and the structure will produce the corresponding stress and deformation, when the stress and deformation exceeds a certain limit, it will make zero, component loss of function, or even destroy, dangerous. Electric chain hoist crane load calculation and its components is zero, unit, component stress analysis of the original basis on which the retirement or cause of the accident analysis to determine the important basis. Load state judgment was accurate or not, will directly affect the results and conclusions of the accident is correct or not. Therefore, we need to understand the load on the crane species, the role of various loads as well as in the direction of the mode of action of different load conditions.
1 dynamic loads dynamic loads that electric chain hoist generated when the state changes in motion Dynamic Effects, dynamic load effects so that the original value of the static load increases. Dynamic loads including variable motion, the structure and weight lifting load inertia loads generated; After the wheel is not flat track adapter, or moving parts of the crane buffers the impact shock loads; inertial loads and impact loads, metal structure and working mechanism of elastic system vibrates the vibration loads, etc..

Dynamic loads and operating speed (acceleration), but not with the direction of movement, but not with the structure of the form and nature (such as the mass distribution of the system, the system stiffness and damping, etc.) related to the conditions of use and the crane driver operation method, operating skills proficiency and other factors.
2 electric chain hoist gravity loads gravity loads include weight lifting loads and loads of two parts. Weight loads include crane metal structure, mechanical equipment, electrical equipment, etc. (not including lifting load) gravity loads. Mode of action of the load and simplify the mechanical model can be considered separately, under normal circumstances, crane machinery and electrical equipment can be considered as concentrated loads on the equipment installation location center truss weight acting on the structure as a concentrated load on the node , box-type structure as a uniform load weight handling. Lifting load hoisting means all gravitational mass, including allowing the maximum effective lifting goods, extract device, suspension flexible member and other lifting devices in gravity. When lifting height of less than 50 meters, weight lifting  wire rope  can be neglected. When the electric chain hoist machine in a non-stationary state of motion, ie, electric chain hoist is not working, or hanging out stops movement at the state
of suspension in the air, or electric chain hoist uniform motion in a steady state, the electric chain hoist Lifting the weight of the load and the load can be treated as a static load.
3 Natural Natural loads which loads the wind, ice, snow, earthquakes and temperature changes caused by natural factors such as load. Work outdoors electric chain hoist, wind loads on the impact of lifting operations should be given adequate attention.