SU904554A1 - Automatic regulator of rotational speed of grain harvester reel - Google Patents

Description

(54) AUTOMATIC ROTATING SPEED REGULATOR OF THE GRAIN CLEANING MACHINE

one

FIELD OF THE INVENTION The invention relates to agricultural machinery, namely, to reapers and pick-ups of grain harvesting machines.

An automatic speed regulator of rotation of the reel of the harvesting machine is known, comprising a rotation speed sensor of the reel, a speed sensor of the harvesting machine, a control unit and an actuator 1.

The disadvantage of this device is the presence of losses due to the fact that during operation of the harvesting machine the device maintains a constant predetermined ratio X of rotation speed of the reel ip.M to the translational speed of the harvesting machine.

V

i.e.

maM

A P-: const. Umash

while the indicator of the kinematic mode A, in order to reduce losses with a change in speed, must be changed according to a certain law related to the state of breadiness.

Also known is an automatic regulator of rotational speed of the reel of a harvesting machine, comprising a machine speed sensor, a speed sensor of the reel and picker, a control unit and an actuator 2.

However, when using this regulator, large grain losses are observed.

The purpose of the invention is to reduce grain losses behind the grain harvester by maintaining an optimal ratio between the rotational speed of the reel and the speed of the grain harvester.

The goal is achieved by the fact that the control unit is designed as a functional converter and is equipped with an indicator of the initial indicators of the kinematic mode of operation of the reel, depending on the state of the crop being harvested.

The controller also contains a logical

15 device, a binary counter and a decoder, moreover, the inputs of a logic device are connected to the speed sensor of the harvesting machine and the indicator of the initial indicators of the kinematic mode, and

Claims (2)

Twenty-one input - with the first input of the decoder, the output of which is connected to the actuator, and the second input is connected to the output of the binary counter, the inputs of which are connected to the speed sensor. FIG. 1 shows a functional diagram of an automatic speed controller for the rotation of the harvesting machine reel; in fig. - graph of dependence of the optimal value of the indicator, kinematic mode of AOPT. from the forward speed of the harvesting machine, the approximating function of which is a function of the form - + Lo, realized by a functional converter of the device, where k is a coefficient determined experimentally; . 0-initial setting indicator, depending on the state of bread. The automatic speed controller for the reel of the harvesting machine consists of a logical device I, whose inputs are connected to the outputs of the sensor 2 of the speed of movement of the harvesting machine and the setting device 3 of the initial kinematic mode, depending on the state of the harvested grain crop, and the output connected to the primary. the input of the decoder 4, the output of which is connected to the actuating mechanism 5, and the second input is connected to the output of the binary counter 6, the inputs of which are connected to the sensor 2 of the speed of movement of the combine ary machine and reel rotational speed sensor 7 (pick). The automatic speed controller of the reel operates as follows. The signals from the sensor 2 of the speed of movement of the harvesting machine and from the adjuster 3 of the initial indicator of the kinematic mode AO are fed to the logical device 1, the output of which receives a code corresponding to the optimum value of the indicator of the kinematic mode of operation Ajdgg, taking into account the input of the decoder 4 Binary counter 6 converts the signals of sensors 2 and 7 into a code corresponding to their ratio inversely proportional to i, which is also fed to the input of the decoder 4. As a result, the two codes, proportional to the values of Ji and A, the descrambler generates a control signal to eliminate the error A Ad. or L Lopt, which is fed to the actuator 5, which controls the variator of the rotation speed of the reel (pick-up). The use of an automatic controller on the harvester, which changes the kinematic mode of operation of the reel according to the law of decreasing direct A –K Vf (, ag | + Lo or other decreasing dependence, as compared with the operation in mode A const, allows to reduce losses on of breads and rolls. This regulator can also be used for a picker picker. Formula 1. Automatic speed adjuster of the harvesting machine reel containing a grain speed sensor reel speed and pick-up speed sensor, control unit and actuator, characterized in that, in order to reduce grain losses, by maintaining an optimal ratio between the reel rotation speed and the movement speed of the harvesting machine, the control unit is designed as a functional converter and provided with a setpoint adjuster of initial indicators of the kinematic mode of operation of the reel, depending on the condition of the crop being harvested. 2. The regulator according to claim. I, characterized in that. that the functional converter contains a logic device, a binary counter and a deflector, the inputs of the logic device are connected to the speed sensor of the combine and the unit for initial indicators of the kinematic mode, and the output to the first input of the decoder, the output of which is connected to the actuator, and the second input is connected to the output of the binary counter whose inputs are connected to speed sensors. Sources of information taken into account in the examination 1. UK patent number 1375827, cl. A 01 D 69 / 0.0, 1974. 2. Sablikov M. V. Agricultural machines, hours. And, M., 1968, p. 157.