RU2356210C1 - Test bench for drilling mechanism of precision seed drill - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: test bench for drilling mechanisms contains a power-drive station, assembly of sensors and recording device. The drilling mechanism is attached to an accelerator which can move back and forth and contacts with the plane. The plane contacting with accelerator is connected with a rod of a regulator controlling the plane position in space and it is also pivotally attached to the frame of the bench.

EFFECT: bench allows receiving accurate performance of drilling mechanism due to simulation of real condition of its functioning in field.

1 dwg

Description

The invention relates to stands for testing seed drills of precision seeders.

A well-known test bench for sowing devices of precision seeders, containing an engine, a receiving conveyor in the form of adhesive tape and the studied metering device / 1 /.

The disadvantages of this stand are the complexity of the experiment and the need for additional measurements, which will be used for data processing.

The closest to the proposed technical solution of the known is a bench for studying the movement of seeds during precise sowing, containing a drive station, a metering system with a metering device, a set of sensors and recording devices / 2 /.

The disadvantage of this device is the rigid connection of the metering device with the frame, as a result of which it remains in a static position during the tests, as a result of this, the inertial loads arising from the accelerated movement of the unit are not taken into account, and it is also impossible to simulate the field relief during the tests. In this regard, the results obtained during tests at the stand will differ from the field.

The objective of the present invention is to provide a universal stand capable of obtaining quality indicators of the sowing apparatus of a pneumatic seeder while simulating actual working conditions in the field arising from work on the field prepared for sowing.

The task is achieved by the fact that in the test bench for sowing apparatus containing a drive station, a metering system with a sowing apparatus, a set of sensors and recording devices, the sowing apparatus is attached to the accelerator, moving back and forth, while the plane with which the accelerator contacts connected with the rod of the regulator of the position of the plane in space and with the frame of the stand by means of hinges.

The drawing shows a diagram of a bench for testing the sowing devices of precision seeders when simulating actual working conditions in the field.

The test bench for precision seeders includes: a power plant containing a power source 1, a resistor 2 and a DC motor 3; a pneumatic system consisting of a power source 1, a resistor 4, a DC motor 5, an exhauster 6, and pneumatic valves 7; the test meter 8 mounted on the accelerator 9, which is in contact with the plane of the frame 10. The plane of the frame 10 is connected to the frame of the frame 11 and the rod of the position regulator of the plane 12 using hinges 13 and 14. The position controller of the plane 12 is connected to the skeleton of the frame 11 by means of a hinge 15. The stand also includes a set of sensors, including a photosensor of the total number of holes 16, located behind the discharge zone in the direction of rotation of the disk of the tested seed meter 8, a photosensor of “passes” 17 located in front of the discharge zone, aka matic device 18 is disposed under the test sowing apparatus 8, and the inductive speed sensor 19 mounted on the drive shaft of the sowing of the test apparatus 8. All sensors through an analog-digital converter 20 connected to the personal computer 21.

The stand works as follows.

When the power supply 1 is turned on by resistors 2 and 4, the operating modes of the DC motors 3 and 5 are set, corresponding to the required rotational speed of the disk of the tested metering unit 8 and the given depth of vacuum. At the same time, under the influence of the accelerator 9, the sowing apparatus 8 moves forward and backward, and the plane of the frame 10 rotates around the hinge 13 using the means of moving the rod of the position regulator of the plane 12, simulating different angles of elevation or slope of the field topography. In the presence of seeds, the photosensor of the total number of holes 16 fixes the number of holes that passed by it during the experiment, and the “skips” photosensor 17 records the number of holes of the sowing disk to which the seed did not stick or was discarded during transportation. The acoustic device 18, detects the loss of seeds, and the distance from the zone of seeds to the surface of the membrane simulates the distance from the zone of seeds to the bottom of the furrow. An inductive speed sensor 19 detects the rotation speed of the sowing disk. The signals from the sensors 16, 17, 19 and the acoustic device 18 are converted into an analog-to-digital converter 20 and supplied to a personal computer 21, where the received data is processed and the finished result is displayed.

Information sources

1. Auth. St. USSR No. 327390, class A01C 7/04, 1972.

2. Belodedov V.A. Installation for studying the movement of seeds with precision sowing. The mechanization and electrification of socialist agriculture. - No. 3, 1967, p. 48-49.

Claims (1)

Test bench for precision seeders seeders, including a power plant, a set of sensors and recording devices, characterized in that the meter is attached to the accelerator, moving back and forth, while the plane with which the accelerator contacts is connected to the rod of the plane position controller in space and with the frame of the stand by means of hinges.