Device and method for testing frictional angles of small-diameter particles

Abstract

The invention relates to a device and a method for testing frictional angles of small-diameter particles. The device comprises a controller, a tested plate, a support, a bottom plate, a first rotating shaft, connecting structures as well as a driving device, a tilt angle sensor, a value display module and image capturing equipment which are connected with the controller, wherein the tested plate is detachably arranged on the bottom plate; the first rotating shaft is arranged on the support, a rotation shaft is arranged at the bottom of the support, one end of the bottom plate is rotationally connected with the support through the rotation shaft, the other end of the bottom plate is connected with the first rotating shaft through the connecting structures, and the driving device is used for driving the first rotating shaft to rotate; the tile angle sensor is arranged on the bottom plate and used for measuring an included angle between the bottom of the bottom plate and the horizontal plane, the value display module is used for displaying values of the tile angle sensor, and the image capturing equipment is used for capturing images of sliding conditions of the small-diameter particles on the tested plate. The device is simple in structure and convenient to operate, measured values of the frictional angles can be obtained directly, and the measurement precision is high.

Description

technical field [0001] The invention relates to the technical field of physical property detection of granular materials, and more specifically, to a testing device and testing method for the friction angle of small-sized particles. Background technique [0002] Friction angle is one of the important indicators to characterize the friction characteristics and flow characteristics of material particles. In the production, processing and refining process of modern agricultural products, accurately detecting the friction relationship between materials and contact surfaces can effectively improve the production and processing efficiency of agricultural products. The friction angle is an important parameter that affects the inclination angle of the guide plate of the material box, the angle of the hole or groove of the seed meter, etc., and this factor needs to be considered in many related mechanical designs. Therefore, the measurement of the friction angle between the material ...

AI Technical Summary

Problems solved by technology

[0003] At present, the test methods for detecting the friction relationship between the material and the contact surface mainly include the discharge method and the injection method, but these two methods have problems such as low measurement accuracy and inconvenient data observation and analysis.

Some devices for testing friction angle introduce tension gauges and displacement sensors, and are connected to computers, but this kind of device has relatively high requirements for particles and has a small scope of application. When a PC is used as a data acquisition terminal, the equipment cost is relatively high

Therefore, at present, the test of friction angle is mainly performed by simple manual measurement with an inclinometer. This test device has no self-locking function, and the shaking of the hand after the material particles slide down will easily introduce manual errors, and the operator needs to read from the arc ruler with naked eyes. The measured value, that is, the measured value cannot be obtained directly, resulting in a large error between the test result and the real value, and it is time-consuming and laborious

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