Will the inclination of the axis centerline affect the transmission efficiency of the gearbox

Main influencing mechanism

1. Gear misalignment: Tilting can cause uneven contact between the tooth surfaces along the tooth width direction, increase local stress, increase meshing loss, and in severe cases, lead to pitting, bonding, and even tooth breakage.

2. Additional load on bearings: Axis tilt introduces additional bending moments and axial forces, increasing the contact stress between bearing rolling elements and raceways, increasing friction losses, and significantly shortening the service life.

3. Deterioration of oil film: Tilting can disrupt the distribution of oil film, causing some areas to enter the boundary for lubrication or even dry friction, resulting in an increase in friction coefficient and temperature rise.

4. Vibration and noise increase: Tilting causes periodic impact loads, and the increase in vibration will further amplify meshing errors and bearing damage.

5. Efficiency reduction amplitude: In general equipment, misalignment of the shaft system may cause a decrease in transmission efficiency of about 5% -15%; If the structure such as worm gear is more sensitive to the axis angle, the efficiency decrease may be more significant when the verticality or angle deviation is large.

2、 Judgment and handling suggestions

1. Check for vibration and noise: If there is abnormal vibration, an increase in the second harmonic vibration component, or a significant increase in noise, priority should be given to checking for alignment.

2. Temperature measurement: Abnormal local temperature rise in the bearing position and housing is often related to unbalanced load and poor lubrication.

3. Check the coupling and oil seal: Wear of the elastic parts of the coupling, loose bolts, and oil leakage of the oil seal are common accompanying phenomena of misalignment.

4. Recheck the centering accuracy: After installation or maintenance, it is recommended to use a laser centering instrument or double gauge method to recheck the radial deviation and angular deviation, and adjust them according to the tolerance allowed by the equipment manufacturer.

5. Check the installation foundation: Uneven base, uneven bolt fastening, foundation settlement, bent shaft, or abnormal bearing clearance may all cause the axis centerline to tilt.