The hydraulic system scheme of the cargo lift elevator is based on the working conditions of the main engine, the technical requirements of the main engine for the hydraulic system, the working conditions and environmental conditions of the hydraulic system, and a comprehensive and comprehensive design selection based on many factors such as cost, economy, and availability. A reasonable and achievable hydraulic system scheme in all aspects. The selection method of the hydraulic system of the freight elevator lift includes: the analysis and selection of the oil circuit circulation mode, the analysis and selection of the oil source form, the analysis, selection, and synthesis of the hydraulic circuit, and the formulation of the hydraulic system schematic diagram.
The choice of the oil circuit circulation mode of the cargo lift elevator mainly depends on the speed regulation mode and heat dissipation conditions of the hydraulic system.
Comparing the differences of various hydraulic control methods, according to the performance requirements of the elevator, the oil circuit circulation method that can be selected is the open system, because the main engine of the elevator and the hydraulic pump must be installed separately, there is a large space for storing the fuel tank, and the hydraulic cargo lift elevator is required to be installed separately. The structure is as simple as possible.
When there are multiple hydraulic actuators in the system, the initial system can be divided into series, parallel, independent, and their combination and complex according to the different connection methods of the oil circuit.
The series connection method is that except the oil inlet of the first hydraulic element and the oil return port of the last actuator are connected with the hydraulic pump and the oil tank respectively, the inlet and outlet ports of the other hydraulic actuators are connected in turn. The characteristic is that when multiple hydraulic components act at the same time, their speed does not change with the external load, and at light load, multiple hydraulic actuators can act simultaneously.
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