Improving the workflow in the hydraulic drive of cultivators

Abstract

The studies were performed to improve workflow of hydraulic automatic control systems of the tillage units. In modern conditions there are new requirements to the agricultural hydraulic drive. Improved hydraulic drive is required. There is a mismatch between the parameters of the hydraulic drive and its functional purpose. It is necessary to analyze the working process in the hydraulic drive of machine-tractor units when performing a complex of field work under various operating conditions. Working bodies have to be moved automatically. The article presents analysis of automatic devices used into tillage machines. Automatic control systems can be hydraulic, electro-hydraulic and pneumatic. Mechanical systems are not effective. Hydraulic systems are cheaper electric and pneumatic. They provide best of energy and quality indicators of technological process
of tillage. The analysis of the working process in the hydraulic drive of cultivators KSG-5 (Russia) and H-7 (Germany). The working body for tillage in a row of trees at the cultivator KSG-5 is represented by a flat-cut paw. The cultivator N-7 is equipped with an hiller. The imperfection of the design of the hydraulic drive of the cultivator KSG-5 is revealed. During operation, there are failures of the hydraulic automatic control system KSG-5. The operation of the hydraulic cultivator KSG-5 leads to an increase in energy costs. Overpressure is created in the hydraulic drive. It is proposed to reduce energy costs due to unloading the hydraulic drive. Under a certain ratio of the movement mechanism parameters, the working elements under the action of soil resistance forces, tend to a row of perennial plantations and are retained in it without the usage of the hydraulic drive. The main part of the energy is spent for retraction by means of hydraulic drive of working elements from a number of plantations.