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The impact of overload operation on electric hoists

releaseTime:2024-07-02 08:54:25source:Mu TiannumberOfPageViews:0

The impact of overloaded operation on electric hoists is multifaceted and often leads to serious consequences. The following is a detailed analysis of the impact of overload operation, including specific impacts on mechanical components, electrical systems, safety performance, and other aspects:

1、 The impact of mechanical components

Gearbox and brake

Impact description: Prolonged overload operation can lead to a significant increase in the temperature of the gearbox and brake pads. When the temperature of the gearbox is too high, it may cause deformation of the connecting shaft, leading to jamming during operation. In severe cases, it may even cause internal jamming and inability to operate.

Specific numbers: Although the specific temperature values are not provided, the mechanical failures caused by high temperatures are clear.

Hook and steel wire rope

Impact description: Long term overload operation can cause cracks in the steel wire rope and small hook, increasing the risk of fracture and leading to safety accidents.

Actual case: Overloading the use of electric hoists directly leads to damage to the lower hook and steel wire rope, and prolonged overload operation will accelerate this process.

Overall stability

Impact description: Overloading can also damage the stability of the electric hoist, making it easy for the suspended object to collide with surrounding objects, causing varying degrees of damage. In extreme cases, it may even lead to malignant safety accidents such as machine dumping.

2、 The impact of electrical systems

electric machinery

Impact description: If the motor exceeds the rated load, the current will significantly increase based on the relationship between current and power (P=UI). According to Joule's law, an increase in current will lead to an increase in heat generation, thereby damaging the insulation layer of the motor, reducing its service life, and even potentially burning the motor.

Specific numbers: Although specific current and temperature values are not provided, it is recognized that motor overheating and damage caused by overloading.

Control system

Impact description: Overloading operation may also have a negative impact on the control system of electric hoists, such as affecting the accuracy of control signals and increasing the load on the control system.

3、 The impact of safety performance

Failure of safety protection function

Impact description: Overloading operation may cause the safety protection function of the electric hoist to fail or respond slowly, making it difficult to prevent safety accidents in a timely and effective manner.

Increase accident risk

Statistics: There is data showing that a considerable portion of all electric hoist accidents are caused by overload use. This indicates that overloaded operation is one of the important reasons for safety accidents of electric hoists.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoistwire rope electric hoistHand chain hoist, lever hoist, pneumatic hoist and other lifting equipment    

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