Step 1 hydraulic cylinder design, master raw materials and the design basis, including: the host uses and working conditions; structural features of work organization, load conditions, stroke size and movement requirements; selected hydraulic system operating pressure and flow; the reality of materials, parts and processing; the relevant national standards and technical specifications. 2. The hydraulic cylinders are exposed to external load forces, such as gravity, external kinematic friction, inertia force and the work load 2000T hydraulic cylinders, hydraulic cylinders to determine the variation in the various stages of the trip, as well as dynamic load value to offer. 3, the hydraulic cylinder according to workload and selected working oil pressure, determines the diameter of the piston and piston rod 4, according to the requirements of the working stroke, the hydraulic cylinder to determine the maximum working length L 1500T hydraulic cylinder, generally L> = D, D for rod diameter. Due to the elongated rod, should be stability and longitudinal bending strength check calculation of hydraulic cylinders. Hydraulic cylinder is expected to usher favorable policies in 2013, cumulative sales of excavators 114,743 units, down 3.5%, in people's expected dull ending. Different companies from 2013 excavator sales point of view, in addition to domestic excavator heavy machine sales were lower, which makes the upstream hydraulic industry suffered a blow. Not long ago, the Ministry of Industry and Information Technology Planning Division revealed that China will accelerate the "strong industrial base", and hydraulic engineering machinery and heavy equipment as an important component of hydraulic cylinders, is expected to usher in a favorable policies. December 2013, China's excavator industry sales 8683 units, an increase of 19.9%, a 6.9% increase over November; cumulative sales of 114,743 units annual excavator hydraulic cylinder professional manufacturing, down 3.5%, in line with people's expectations. Prospective Industrial Research Institute released the "2013-2017 China hydraulic industry sales forecasting and upgrade analysis report" shows that the largest construction machinery hydraulic products downstream applications industry, estimated as the amount, about one-third of domestic hydraulic products are used in mechanical engineering; and construction machinery hydraulic excavator is the most used and most demanding hydraulic products. Different companies from 2013 excavator sales point of view, in addition to domestic excavator heavy machine sales have declined. 2013 affected excavator sales decline, sales and marketing of hydraulic cylinders have also been some impact. Hydraulic cylinder manufacturer, Ya'an hydraulic cylinders, hydraulic speed quality provided by Dezhou City mass-velocity hydraulic machinery factory. Dezhou City mass-velocity hydraulic machinery plant (www.dzzhisu.com) (www.dzzhisu.com) strong, credible, in Dezhou hydraulic equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the quality of innovative ideas will lead you hand speed hydraulic and into the brilliant, for a better future!