Investigation of the influence of the parameters of a hydropneumatic accumulator on the operation of the device for controlling the position of a cylindrical brush of a communal machine

The article is devoted to the actual problem of improving the quality of cleaning roads and sidewalks by communal machines with brush working equipment. One of the main parameters of the working process of a communal machine with brush working equipment, which determines the cleaning efficiency and brush life, is the brush pressing force against the surface to be cleaned. In order to ensure the highest efficiency of the cleaning process during the operation of the communal machine, it is required to maintain a certain value of the brush pressing force. During the operation of a communal machine equipped with brush implements with track rollers, the pressing force can vary significantly. To maintain the required value of the brush pressing force against the surface to be cleaned, a device for controlling the position of the brush working equipment using a hydropneumatic accumulator connected to the rod end of a standard hydraulic cylinder is proposed. The pressure of the working fluid created by the hydropneumatic accumulator and acting on the piston of the hydraulic cylinder creates a force acting on the brush working equipment, which makes it possible to provide the necessary force for pressing the brush to the surface to be cleaned. The performance indicators of the device for controlling the position of the brush working equipment depend on the selected values of the design parameters of its elements, including the parameters of the hydropneumatic accumulator. The dependences of the deviation of the brush pressing force from the required value during the vertical movement of the brush working equipment on the useful volume, the initial charging pressure and the maximum pressure of the hydropneumatic accumulator are obtained. A method is considered to reduce the deviation of the brush pressing force from the required value by connecting an additional volume to the gas cavity of the hydropneumatic accumulator.