Mathematical Model of Parameters of Hydraulic Drive Cylinder of Agricultural Machinery
The article discusses the issues of the use of hydraulic drive of agricultural machinery, justified by the problem of improvement and modernization of agricultural machinery, where the main attention is paid to the modernization of the hydraulic drive performing basic technological operations, primarily modernization concerns the hydraulic cylinder, being the essential element in the hydraulic drive, and having a low mass per unit of transmitted power, relatively small dimensions, stepless speed control, high efficiency, ease of operation, compactness, power parameters and other positive qualities. When improving agricultural machinery, there appears a question of upgrading the hydraulic drive, primarily the hydraulic cylinder, to improve power, speed and design parameters. The authors have proposed a mathematical model that allows calculating the parameters of an improved hydraulic cylinder, primarily the determination of forces, power, sleeve diameters, stem diameters, the choice of piston and stem seals; calculation of sleeve thickness, determination of diametrical deformation and linear compliance of the system, as well as design parameters of fasteners. The initial data for calculations are the type of hydraulic drive in which the hydraulic cylinder is used, the type of hydraulic cylinder, the operating maximum load, the stroke speed of the hydraulic cylinder, the reverse stroke speed of the hydraulic cylinder, the stroke length of the hydraulic cylinder, the degree of unevenness of the stroke speed of the hydraulic cylinder, the maximum weight of the load being moved, as well as the design features of the hydraulic cylinder mounting, seals, and braking.