三马致力于打造优质传动设备蜗轮蜗杆

Failure analysis of oil outlet holes at the top of worm gear box:

This is mainly due to the small cylinder of polyurethane seal damage, pressure oil into the worm gear box caused by the replacement of the seal ring. The specific method is to remove the screw of the inlet pipe and two copper pads on the side of the small cylinder of the worm gear box, remove the fastening screw of the small cylinder and the worm gear box, remove the whole set of small cylinder, then remove the back cover and spring of the small cylinder, remove the piston to see the sealing ring. The small cylinder polyurethane seal rings used in the series of paper cutters produced by our company are divided into two types: shaft (mounted on the inner wall of the small cylinder) and hole (mounted on the outer diameter of the piston), which must be carefully distinguished when purchasing. The Y-shaped opening of the sealing ring should be directed toward the inlet direction of the pressure oil during installation, otherwise it will not work. In addition, when installing the small oil cylinder body, be careful that the plain bearing on the push rod can not fall off.



In order to replace the polyurethane sealing ring, we must pay attention to the model, specifications, date of manufacture and so on. Especially in recent years, the polyurethane sealing rings are made of imported parts, such as 1150, 1370 specifications of machines. The color of the imported polyurethane sealing rings is blue, and the size is 72 *60 *10mm. So please change them one at the same time. We must first look at the specifications and colors of the sealing ring in Qingyuan.



Damage to the polyurethane sealing ring in small cylinders will also reduce the cutting force of the knife, and even though the pressure of the auxiliary pump shows normal, it can not cut the paper. This is because the pressure oil can not fully act on the small cylinder piston, part of the leakage into the worm gear box caused by the loss of pressure.