Why is the universal joint drive shaft unbalanced

1. The unilateral unbalanced state of the precision universal joint drive shaft.

If the center of gravity of the object is not on the axis of rotation, one-sided imbalance will occur. At this time, regardless of the relative position between the object and the axis, it will not be in a static equilibrium state. Place the journal of the unbalanced object on two parallel horizontal rods or guide rails, and then you can observe the angular position and the correction amount to be corrected in a single surface. The heavy side of the object always immediately turns to the position below the axis. The adjustment method is to add a counterweight to the radius of the symmetrical point between the heavy side of the object and the center of rotation. The static balancer can achieve single-sided balance without rotating the rotor. , Centrifugal balancing machines are often used to achieve single-sided balancing.

2. The double-sided unbalanced state of the universal joint drive shaft.

When there is an unbalance and a phase difference in the two planes of the universal joint, this unbalanced state will appear. The phase difference is not necessarily 180 degrees. Offset occurs. Generally, the two axes are skewed with each other. When a rotating cylinder with unbalanced moment, such as a coupling, is not restricted by the bearing, it will rotate around the main axis of inertia. Geometric longitudinal axis. Moments of equal magnitude but opposite directions are sometimes referred to as couple imbalance of 5-153X GU1000 PRECISION 369 universal joint.