Calculating, designing and manufacturing super short height hydraulic jack, double acting, lifting capacity of 30 tons for lifting bridge beam to replace bearings = Tính toán, thiết kế và chế tạo kích thủy lực siêu ngắn, kiểu làm việc hai chiều, tải trọng nâng 30 tấn, phục vụ nâng dầm thay gối cầu

Abstract

Almost every type of jacks for lifting beams of bridges to replace bearing today are single acting or have no mechanical locks. The purpose of this research is to design and to manufacture a lifting capacity of 30 tons, double acting, included mechanical lock, and large lifting height hydraulic jack. This article presents the calculation, design meathod with solidwork software and test fabrication that type of hydraulic jack.