RU65629U1 - INSTALLATION FOR RESEARCH OF AERODYNAMIC RESISTANCE OF BULK AND BADLY AGRICULTURAL MATERIALS - Google Patents

Abstract

for the proposed utility model, an apparatus for studying the aerodynamic resistance of bulk and low-flowing agricultural materials. The utility model relates to devices for studying the drying process of plant materials, for example, seeds of grain crops and combine harvesting flax. The utility model is aimed at expanding the functionality of the installation — the study of the aerodynamic drag of a layer depending on its state. For this, the apparatus for studying the aerodynamic resistance of bulk and low-flowing agricultural materials contains a rectangular casing, a fan connected to the casing by means of an air duct, a sensor for measuring air flow and a static pressure sensor. Two opposite side walls of the casing are made of translucent material. A light radiation source is adjacent to one of the lateral translucent walls, and a light radiation receiving screen is adjacent to the opposite wall, an additional light meter and a selenium sensor are installed in front of the receiving screen, a video camera is installed above the receiving screen to record the state of the layer of the material under study. Inside the casing in its lower part there is an air distribution partition on which a layer of the material under study is located.

Description

Installation for studying the aerodynamic resistance of bulk and low-flowing agricultural materials.

The utility model relates to devices for studying the drying process of plant materials, for example, seeds of grain crops and flax harvester harvesting.

A device for determining the resistance of fibrous materials to air flow, containing a fan, measuring instruments, as well as a vessel for laying samples made perforated on all sides and enclosed in a casing covering its sides [1]. A disadvantage of the known installation is the limited functionality when conducting research on their types.

Closest to the claimed device is a device for studying the aerodynamic drag of plant materials, comprising a rectangular casing, a movable cassette for sample of the material to be studied, a fan connected to the casing by means of an air duct, a sensor for measuring air flow, and a static pressure sensor [2].

A disadvantage of the known installation is the limited functionality when conducting research on their types, which allows to determine the aerodynamic resistance of the material layer without taking into account its properties: density, porosity, as well as changes in these properties under the influence of air flow.

A useful model is aimed at expanding the functionality of the installation - the study of the aerodynamic resistance of a layer depending on its state in density, fractional composition and humidity.

This object is achieved in that the installation for studying the aerodynamic resistance of bulk and low-flowing agricultural materials contains a rectangular casing, a fan connected to the casing by means of an air duct, a sensor for measuring air flow and a static pressure sensor. Two opposite side walls of the casing are made of translucent material. A light radiation source is adjacent to one of the lateral translucent walls, and a light radiation receiving screen is adjacent to the opposite wall, an additional light meter and a selenium sensor are installed in front of the receiving screen, a video camera is installed above the receiving screen to record the state of the layer of the material under study. Inside the casing in its lower part there is an air distribution partition on which a layer of the material under study is located.

The source of light radiation allows you to set the intensity of the light flux at a strictly defined level. The video camera allows you to record the intensity of the light flux passing through the layer, which depends on the state of the layer.

Figure 1 shows the installation for studying the aerodynamic resistance of bulk and low flowing agricultural materials during vertical purging of a sample of material and its unloading; figure 2 - the relative position of the wave radiation source, the screen of the wave radiation receiver, video camera, selenium sensor, light meter.

The apparatus for studying the aerodynamic resistance of bulk and low-flowing agricultural materials contains a rectangular casing 1, a fan 2 connected to the casing by means of an air duct 3, a sensor for measuring air flow 4 and a static pressure sensor 5. Two opposite side walls

the casing 6 is made of translucent material. A light radiation source 7 is adjacent to one of the lateral translucent walls, and a light radiation receiver 8 is adjacent to the screen opposite it, an additional light meter 9 and selenium sensor 10 are installed in front of the screen, a video camera 11 is installed above the screen, which records the state of the layer of the material under study. Inside the casing in its lower part there is an air-distributing partition 12, on which the layer of the test material 13 is located. The casing has a drain tray 14 and a shutter 15 for replacing the sample of the test material. The fan is equipped with an iris diaphragm for changing the air flow.

Installation for the study of the aerodynamic resistance of bulk and low-flowing agricultural materials works as follows.

Without a layer of material in the tank casing 1, the intensity of light radiation is set at a strictly defined initial level. Then, a sample layer of material 13 having its own characteristics of density, humidity and fractional composition is loaded into the casing capacity through the shutter 15. Turn on fan 2 and use the iris diaphragm to set the air flow. Changes in air velocity and static pressure are detected by sensors 4, 5.

In the process of research, the degree of expansion of the material layer and its liquefaction changes, and the degree of wave flow absorbed by the material changes, which is recorded by the video camera 11, light meter 9 and selenium sensor 10. The moment of supply of the wave flow is synchronized with the inclusion of the video camera.

After conducting the experiments, the studied material is removed from the casing through the drain tray 14 with the shutter 15 open.

Thus, the described installation provides the expansion of functionality, namely, the determination of the aerodynamic resistance of a layer depending on its state by density, humidity and fractional composition, which makes it possible to fully implement its application, obtain operational database fixation and processing, and this contributes to more efficient use of the drying potential of the drying agent and, consequently, a reduction in the specific heat consumption.

LIST OF USED SOURCES

1. USSR Copyright Certificate No. 202562, Cl. 42k 30/04. A device for determining the resistance of fibrous materials to air flow. Authors: V.I. Pyatrushevichyus, P.I. Vezhis, V.M. Lyubarsky

2. Copyright certificate of the USSR No. 1190163, Cl. F26B 9/06, 21/04. Installation for studying the aerodynamic drag of plant materials. Authors: V.A. Koryagin, L.A. Sulima, N.M. Grutko

Claims (1)

Installation for studying the aerodynamic resistance of bulk and low-flowing agricultural materials, containing a rectangular casing, a fan connected to the casing by means of an air duct, a sensor for measuring air flow and a static pressure sensor, characterized in that the two opposite side walls of the casing are made of translucent material, to one a light radiation source is adjacent from the lateral translucent walls, and a screen-receiver of light radiation is adjacent to the opposite wall, In addition, a light meter and a selenium sensor are installed in front of the receiver screen, a video camera is installed above the receiver screen, which fixes the state of the layer of the studied material, inside the casing in its lower part there is an air distribution partition on which the layer of the studied material is located.