Electric hoist three kinds of loads and effect

Wire rope hoist load refers to the process in operation, load bearing species complex loads in a different direction, not only in the running to be included electric hoist static load, dynamic load, alternating load, etc. The role of various loads, And with electric hoist operation conditions change, even if the load is also exhibited similar characteristics varied. Subject to the lifting 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 hoist  lift hoist  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.
A gravity load hoist loads and gravity loads, including weight lifting load two parts. Weight loads include crane metal structure, mechanical equipment, electrical equipment, etc. 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. Weight load is typically less than the weight of the object it works much more. 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 rope can be neglected. When the hoist is in a stationary state of non-movement, namely electric hoist is not working, or hanging out stops movement at the state of suspension in the air, or electric hoist uniform motion in a steady state, the electric hoist lifting the weight of the load and the load can be As static load handling. For bridge type hoist, trolley material through horizontal movement along the main beam, the car weight and lifting load is composed of a mobile load.

Two. Impetus to make  wire rope hoist  load dynamic loads generated upon a change in the state of 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 load and the speed of the work, with the direction of movement, but not with the form and nature of the structure, and the conditions of use of the crane and drivers methods of operation, operation skills proficiency and other factors.
Three Natural load load specifically refers to the natural wind, ice, snow, earthquakes and temperature changes caused by natural factors such as load. Work outdoors  rope hoist ，  wind loads on the impact of lifting operations should be given adequate attention.