What are the specific effects of thermal expansion and contraction factors on the clearance of ZSC600-77.5-3 medium hard tooth reducer

The specific effects of thermal expansion and contraction factors on the clearance of ZSC600-77.5-3 medium hard tooth reducer are as follows:

The impact of temperature rise

Reduced gear clearance: During the operation of the reducer, components such as gears generate heat due to friction, leading to an increase in temperature and expansion of metal materials. If the original gear mesh clearance is small, expansion may further reduce the clearance and even cause gear jamming, resulting in a decrease in equipment output torque, weakened load capacity, increased energy consumption, and a decrease in positioning accuracy and motion stability due to changes in part size.

Reduced bearing clearance: If the inner ring of the bearing is tightly fitted with the shaft, the inner ring will expand to a certain extent when the temperature rises, resulting in a decrease in bearing clearance. This may cause the shaft to experience thermal expansion and generate tension, affecting the normal operation of the shaft system, increasing friction and stress inside the bearings, and accelerating bearing wear.

The impact of temperature reduction

Increase in gear clearance: When the reducer stops running or is in a low-temperature environment, components such as gears will contract, resulting in an increase in clearance between gears. Excessive clearance can cause impact loads on gears during start-up and reversing, reduce transmission accuracy, increase vibration and noise, and accelerate gear wear.

Increased bearing clearance: The inner and outer rings of the bearing will contract when the temperature decreases. If the amount of contraction is different, it may increase the bearing clearance. Excessive clearance of bearings can cause unstable operation, vibration, and noise, and in severe cases, even damage to the bearings.

The impact of temperature difference changes

Inconsistent deformation of components: Under frequent start stop or alternating cold and hot working conditions, thermal stress in the gearbox can cause varying degrees of thermal expansion and contraction between different components. Long term accumulation may cause component deformation, increase clearance, and affect the normal operation and service life of the gearbox.

Changes in bolt tightening force: Components made of different materials have different coefficients of expansion when subjected to temperature changes, which may cause changes in the relative position between the bolt and the connected component. In high temperature environments, bolts expand due to heat, resulting in a decrease in preload force; When the temperature decreases, the bolt shrinks. If the degree of shrinkage of other components is not consistent with that of the bolt, it may cause the bolt to be subjected to additional tensile or shear forces, resulting in changes in the tightening force and affecting the connection stability of the gearbox components, indirectly affecting the clearance.