Abstract
The article discusses the control system of a hydraulic power source of constant pressure, which is a pump-storage power source, equipped with the original design of the automatic unloading of the hydraulic pump, which provides relay switching of its operation mode. A mathematical model is proposed, obtained using a modeling technique based on the application of the theory of volumetric rigidity of hydraulic systems and their elements. The results of a numerical experiment carried out by numerically solving the equations that make up the mathematical model of a power source are also presented. As a result of a numerical experiment, the main technical capabilities of the considered power source and the influence of its main structural parameters and functional features of the system on operational properties are revealed. The results showed that due to changes in various design parameters of the unloading machine, you can not only change the upper (maximum) and lower (minimum) values of the battery charging pressure, but also adjust their difference depending on the requirements for the power source.
Highlights
Some believe that the use of hybrid models is most effective by combining the precise and energy-efficient operation of an electric motor with the well-established ability of hydraulic systems to create pressure
We propose to consider a system for automatic control of a constant pressure power source equipped with a hydraulic pump unloading machine [2, 3], which contains a differential valve, which virtually eliminates the likelihood of the operation of the unloading machine in hovering mode
In order to identify the main functional capabilities of the control system of the pumpaccumulator hydraulic power source equipped with a pump unloading machine of the proposed design, a numerical experiment was carried out
Summary
Some believe that the use of hybrid models is most effective by combining the precise and energy-efficient operation of an electric motor with the well-established ability of hydraulic systems to create pressure. All this at a price average for both types of installations. Hybrid designs began at first to be created by “electrifying” the screw plasticizers, “the largest energy absorbers,” according to Hicks of Sumitomo. About 7% goes to the clamping device, and another 5% to the extraction, ”explains Hicks. “66% of the energy that can be used to extract the screw remains.
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