Advance of spindle drum and frontality of active spindle surface

Abstract

Harvesting machines of modern cotton pickers are equipped with spindle drums, making rotational movements against the direction of machine motion. To ensure the natural position of the bushes with bolls in the working area of the vertical spindle apparatus, the linear speeds of the spindle centers on the drums advance the speed of the machine. The aim of the paper is to develop a methodology for calculating the lead coefficient depending on the parameters of the drum, spindle, its activity, and frontal location, where the active surface of the spindle should be located opposite the cotton plant. Specific recommendations are given for calculating the operating modes of a cotton picker.

Mathematical modelling and numerical methods for studying the dynamic stability of the movement of cotton harvesters on slopes

“…For the transverse tipping of cotton harvesters, a smaller value is taken, connecting the centres of the contact areas of the back wheels of one side (Figure 1). The reaction of the sides located down and up the slope with the static position of the machine on the transverse slope with an angle β, is determined from the condition of equilibrium of the machine relative to the axis, passing through the centres of contacts of the wheels of one side [11][12][13][14][15][16] A…”

“…One of the important performance indicators of the machine's patency is stability, which characterizes its ability to work on longitudinal and transverse slopes without tipping over. The assessment of the stability of machine-tractor units in dynamics presents great difficulties due to the large number of interacting factors affecting the stability of the system movement [1][2][3][4][5][6][7][8][9]10,12,13,14,17].…”

Methods for calculating the pressure loss of the air flow and energy consumed by the fan of the cotton harvester

“…where:   is the air flow velocity in the pipeline, m/s;   is the air density, (ρ = 1.29 kg/m 3 ); β -is the coefficient of pressure loss during acceleration of the material, (β = 1.8 + 1.5 m) [13] The pressure loss in the pipe-bend is determined as:…”

“…Improving the efficiency of the pneumatic transport system of the cotton harvester while maintaining the biological qualities of cotton, with less loss of raw material and less power consumption of the fan drive, is a relevant aspect. However, no attention was paid to the development of mathematical models to effectively use the pneumatic transport system [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Bench tests of friction drive of vertical spindle made of poly-V belts

“…Therefore, the value ܸ ത also affects the cotton harvest. It follows from the foregoing that the main reason for the decrease in the completeness of the collection should be considered a violation of the normal functioning of the spindle drive [6][7][8].…”