The main drive universal jointing device is used in the main drive system of the four-roller roughing mill, installed between the main motor and the work rolls of the roughing mill, its role is to transfer the rotation and torque of the motor to the rolls.
The main drive universal jointing device is used in the main drive system of the four-roller roughing mill, installed between the main motor and the work rolls of the roughing mill, its role is to transfer the rotation and torque of the motor to the rolls. The upper and lower universal joint shaft of the intermediate shaft is set up as a balance point, a balancing device to make the upper and lower universal joint shaft position change in a balanced state.
When the work roll opening degree changes, ensure the normal operation of the rolling equipment. Shaft balancing support for SWP type bearing seat type split roller bearing, upper shaft balancing is placed on the balance of the upper balance cylinder through the lever and the two pallets and bearing seat balance.
The lower joint shaft balance is balanced by the lower balance cylinder placed on the balance seat directly against the support pad at the bottom of the lower bearing seat. The universal joint is composed of two cross universal joints to achieve equal speed operation with different axis folding angles to transfer torque.
1. The work roller flat head and universal joint flat head hole clearance are too large, resulting in a flat head hole in the axial direction on the work roller with no binding force, the shaft rotation process produces axial force, resulting in motor rotation instability.
2. Angle between the work rolls or support roles, resulting in the relative twisting of the two rolls bearing seat, uneven force, resulting in large axial force, rolling process, universal joint with the rolls swing phenomenon, or resulting in the cross universal joint shaft bearing force damage.
3. The mill roll system balance system or shaft balance system failure, resulting in unstable shaft rotation, a larger shaking.
4. Main motor lubrication system failure, split bearing failure, cross universal joint bearing failure will also lead to unstable rotation of the joint shaft, periodic oscillation phenomenon.
Although there is a certain gap between the work roller flat head and cross universal joint flat head hole design, but the gap value is small, the relative displacement of the two is also small, the basic operation of the joint shaft in the process can not be seen.
But when the wear between the flathead and flat head hole increases, the gap increases, there will be a larger relative movement between the two, the joint shaft rotation process will not be consistent with the centerline of the roll, thus producing a certain angle, because the rolls are fixed in the pagoda, which leads to the joint shaft in the process of rotation of the periodic wobble.
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