Motor driven hydraulic control system with adaptive flow distribution function

Abstract

The invention discloses a motor driven hydraulic control system with an adaptive flow distribution function. The system comprises a hydraulic oil tank, a first hydraulic motor and a second hydraulic motor; the first hydraulic motor is connected with a first motor control valve, a first flow regulator and a first motor rotating direction controller; the second hydraulic motor is connected with a second motor control valve, a second flow regulator and a second motor rotating direction controller; the system further comprises a third flow regulator; pressure sensing ports of the three flow regulators communicate with one another; when load of one hydraulic motor is increased, the three flow regulators cooperate for work, the oil intake amount of the motor is increased, the oil intake amount of the other motor is reduced, normal work is guaranteed, and after the load returns to normal, the normal hydraulic state is restored under cooperative adjustment of the three flow regulators. The system has the characteristics of producing little heat and being more energy-saving; one pump controls multiple motors, an electrical control system is not needed, and the cost is relatively low; and the scheme is easy to implement, and the operation effect is better.

Description

technical field [0001] The invention relates to a hydraulic control system, in particular to a motor-driven hydraulic control system with flow self-adaptive distribution function. Background technique [0002] In agricultural harvesting machinery or construction machinery, two or more hydraulic motor-driven rotating mechanisms are usually used, and these rotating mechanisms have interrelated motion relationships: for example, in agricultural harvesting machinery, the fruit picking device (rotating mechanism) occurs When it is blocked (the load increases at this time), the pick-up device of the header (which is a rotating mechanism) is required to automatically and appropriately reduce the speed (that is, the flow rate of the motor driving the pick-up device should be appropriately reduced), and at the same time, the speed of the fruit picking device is required to be increased appropriately (that is, The flow rate of the motor driving the fruit picking device should be appro...

AI Technical Summary

Problems solved by technology

In the traditional scheme, when the flow through the valve controlled by the proportional valve or servo valve decreases, the excess hydraulic oil in the hydraulic system will overflow back to the oil tank through the overflow valve of the hydraulic system, which will cause heat generation and power waste of the hydraulic system; control The cost of sensors and controllers in the system is relatively high; the control strategy is relatively cumbersome, the control system is difficult to debug, and the operation effect is not ideal

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