余姚镇农机厂生产的螺杆式启闭机,启闭能力为开10吨;闭8吨。启闭机的闸门升降速度为167毫米/分,而蜗杆轴端轴承盖的油毡油封漏汕很厉害,不仅浪费润滑脂,也影响机体清洁和机房美观。但只要把原来轴承盖上的油毡油封槽,改车成自紧骨架油封 Yuyao town agricultural machinery factory screw hoist, opening and closing capacity to open 10 tons; closed 8 tons. Hoist gate lift speed of 167 mm / min, while the worm shaft shaft bearing grease cover seal leaks very powerful, not only a waste of grease, but also affect the body clean and beautiful room. However, as long as the original bearing cover on the linoleum oil seal groove, the car into tight self-tight oil seal