Hydraulic cylinder is the executive element of hydraulic transmission, which has a direct connection with the host and the working mechanism on the host. For different hosts and institutions, with the use and working conditions require different types and structures of hydraulic cylinders vary widely, there is no uniform specification, unlike hydraulic pumps and hydraulic valves have been standardised, and therefore must be designed according to the actual needs of their own.
Hydraulic cylinder design steps are not mandatory, should be pattern has been determined by a variety of conditions, the flexibility to choose the design process, generally refer to the following steps:
1, master the original information and design basis, usually including some of the following: the use of the host and working conditions; the structural characteristics of the working mechanism, load conditions,
Stroke size and action requirements; hydraulic system selected working pressure and flow; materials, accessories and processing technology of the reality; relevant national standards and technical specifications.
2, according to the host action requirements to select the type of hydraulic cylinder and structural form.
3, according to the hydraulic cylinder to withstand the external load force, such as gravity, external institutional movement friction, inertia and work load, determine the hydraulic cylinder in the stroke of the various
Stage on the change rule of the load and must provide the power value.
4, according to the working load of the hydraulic cylinder and the selected oil working pressure, determine the diameter of the piston and piston rod.
5, according to the movement speed of the hydraulic cylinder, piston and piston rod diameter, determine the flow rate of the hydraulic pump.
6, select the cylinder barrel material, calculate the outer diameter.
7, select the structural form of the cylinder head, calculate the strength of the connection between the cylinder head and cylinder barrel.
8, according to the requirements of the working stroke, to determine the maximum working length of the hydraulic cylinder l, usually l ≥ d, d for the piston rod diameter. As the piston rod is slender, the
Longitudinal bending strength should be checked and the stability of the hydraulic cylinder calculation.
9, if necessary, the design of buffer, exhaust and dust and other devices.
10, drawing hydraulic cylinder assembly and parts drawings.
11, collate the design calculations, validation drawings and other technical documents.
