The factors of productivity of flax stock pickup balers as object of maintenance service

Abstract

The paper is aimed at enhancing the efficiency of using pickup balers for harvesting dew-retted flax stock. The objective of the research was specifying the effects of movement velocity pickup baler on the change in the roll density, damage of flax stalks in them and the mass of packages. Consideration is given to the change in the length offlax stock belt on the field, according to which one roll was formed; the duration of forming one roll and the quantity of rolls formed per hectare depending on the velocity o f movement ofpickup balers. The productivity of balers in the tons ofpicked up flax stock and hectares of harvested flax stock per hour of the main time is calculated. With respect to the design velocity of movement of balers and the standard coefficient of using the shift work hours the author determines the productivity of the harvesting unit together with flax stock baler per hour of the shift time, which is compared to the hour norm of productivity for the corresponding group of enterprises as to the standard forming factors. The tasks specified were solved through the corresponding experimental research and separate calculations. The investigation covered the use of harvesting units that included МТЗ-80 tractor and flax baler ПР-1.2JI with baking chamber of accessory volume and ППР-110 hay baler with the baling chamber of constant volume. In the investigated baler the roll density controller was fixed in the minimum, basic and maximum position. At the investigated movement speed the shift of the roll density controller from minimum to maximum was accompanied by the increase in the roll density, damage of flax stock, roll mass length of flax stock belt which was picked up for forming one roll, the length stock layer in the roll and duration of the roll formation. The shift in the position of the roll density controller from minimum to maximum result in the decrease in the quantity of rolls formed per one hectare of the field. Along with the increase in the speed of balers the length offlax stock belt, which is picked up from the field to form a roll, decreases linearly; and the length of flax stock layer in the roll decreases accordingly to the degree-oriented dependencies; the duration of the roll formation decreases accordingly to the gradually descending hyperbolae; the quantity of the rolls formed per hectare of the flax stock harvested area increases linearly. The author also specifies the change in the productivity of balers per hour of the main time depending on the working speed of harvesting units. In the context of enterprise groups according to standard forming factors the standard productivity of balers per hour of the shift time is characterized.