| Popis: |
Hydrostatic steering is widespread in the construction of modern tractors. In recent years, it began to apply in designs of haulage trucks and high-speed crawler vehicles. This steering allows for the free arrangement of its main units, simplifies the design, reduces the material consumption of the machine and improves the working conditions of the driver. At the same time, the cost of manufacturing a hydrostatic power steering in recent years has significantly decreased due to the development of high technologies for the manufacture of its units. Hydrostatic steering is a purely hydraulic transmission with flexible connecting pipelines (hoses) of relatively high pressure, less reliable in operation than mechanical tractions, this requires increased attention to the reliability and safety of its operation. For this reason, it is not recommended for use on vehicles with transport speeds above 50 ... 60 km / h. In the known scientific literature there are practically no publications on methods for designing and calculating hydrostatic steering. In the educational literature on tractors, published by professors of the Moscow Polytechnic University, information is given on the design and methods for designing and calculating hydrostatic steering. The task of designing and calculating such a steering is selecting the necessary parameters for the hydraulic cylinder, the metering pump and the power source (drive pump) for it. These units are produced serially, from which the hydrostatic steering is designed. The technique of design and calculation of single-circuit and dual-circuit hydrostatic steering is considered. Information is provided on the characteristics of gerotor type metering pumps of foreign and domestic production. |
