How to adjust the clearance of SWL screw elevator correctly

SWL screw liftThe screw nut drive is a common mechanism to achieve linear motion.It is difficult to achieve no gap between the lead screw and the nut.Especially after a stage of use, due to wear and tear, the gap will increase, affecting the normal operation of the equipment.Therefore, in the process of equipment maintenance, it is very important to pay attention to eliminating the gap between the screw and the nut.

one,SWL screw liftdisplacement compensation
Shift compensation is often used for single-term precision error compensation.
1. Compensation for axial movement: First, measure the perpendicularity error between the bearing positioning end face on the main shaft and the center line of the main shaft and its direction position; The high point is shifted so that it can be assembled with the low point of the circular runout of the thrust bearing end face, which can reduce the amount of error of the axial play.
2. Compensation of radial circular runout: For parts assembled on the shaft, such as gears, worm gears, etc., the radial circular runout value of the parts on the outer circle and the shaft at the assembly of the parts should be measured first, and the high points should be determined respectively. location.When assembling, move and adjust the high point of the radial runout of the two to make them in the direction of a difference of 180°, so as to offset part of the radial runout error.In order to reduce the radial runout value of the front end of the main shaft, the large radial circular runout points generated at the front and rear bearings can be located on the same side of the main shaft center line in the same axial plane, and the error value of the front bearing can be made smaller than that of the rear bearing. error value.

XNUMX. Error compensation method

Error compensation is an adjustment method to ensure the accuracy of the movement trajectory of the equipment by properly assembling the errors of the parts themselves to produce relative degrees of mutual cancellation.In the maintenance of mechanical equipment, the commonly used error compensation methods include displacement compensation and comprehensive compensation.