INFLUENCE OF THE DAMPING DEVICE ON THE DYNAMICS OF THE HYDRAULIC DRIVE OF THE LOAD LIFTING DEVICE

Abstract

Introduction. The article considers the value of the hydraulic accumulator in the hydraulic drive of a lifting mechanism with a load, as well as the influence of the working volume of the hydraulic accumulator on the pressure of the hydraulic system under the action of dynamic forces.

More than two centuries have passed since the invention of the accumulator. The past time has significantly expanded the areas and tasks solved by the installation in hydraulic systems.

Currently, almost all machines are equipped with hydraulic equipment, so improving the performance of the hydraulic drive will increase the efficiency and productivity of lifting, transport and technological machines.

The best practical illustration of the value of a hydraulic accumulator in a hydraulic drive, as a dynamically active compensator, is a lifting mechanism.

Method of research. One of the methods for improving these characteristics is the use of hydraulic accumulators in the hydraulic system of lifting, transport and technological machines, which have a high energy consumption with a relatively low mass and high speed of these hydraulic units. The battery is able to store the energy of the fluid in the hydraulic system when the energy in the hydraulic system is excessive, and give it back when necessary.

The possible use of a hydraulic accumulator is not only limited to energy collection and return, it is also used to protect the system from excessively high pressures that occur as a result of hydraulic shocks, to reduce pressure pulsations in the system caused by the operation of pumps, valves and distributors, to absorb kinetic energy under inertial loads, to fill leaks and to compensate for changes in volume when the temperature changes.

Conclusions. The given dynamic model allows us to estimate the value of the working volume of the hydraulic accumulator, the nature of changes in the pressure values, depending on external parameters, the kinematic scheme of lifting the load from any position of the boom of the lifting mechanism.