Centrifugal soil tangential adhesion friction test device and its test calculation method

A calculation method and technology of a testing device, which are applied in measurement devices, force/torque/work measuring instruments, instruments, etc., can solve the problems of lack of analysis methods for adhesion friction force testing devices, and achieve the effect of simple device structure and convenient use.

Active Publication Date: 2020-04-21
JILIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve above-mentioned existing soil adhesion test device all is the adhesion test of normal direction, lacks problems such as the adhesion friction test device of tangential direction and practical analytical method thereof, and Provide a centrifugal soil tangential adhesion friction test device and its test calculation method

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  • Centrifugal soil tangential adhesion friction test device and its test calculation method
  • Centrifugal soil tangential adhesion friction test device and its test calculation method
  • Centrifugal soil tangential adhesion friction test device and its test calculation method

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Embodiment Construction

[0027] The present invention is mainly designed for testing the tangential adhesion friction force of heavy soil. The basic idea of ​​the test calculation method involved is that the objects at the edge of the disc move together with the disc during the rotation process of the horizontally placed disc. Rotating at a constant speed, if the resistance of the air is ignored, the soil M on the disk is mainly affected by gravity G, and the normal support force F of the disk to the soil is N , centripetal force F ω and the tangential adhesive friction force F τf , if the soil M is in equilibrium, the gravity G it bears and the normal support force F of the disc on it N is a pair of equal and opposite forces, and in the horizontal direction, the soil M is subject to centripetal force F ω and the tangential adhesive friction force F τf , these two forces are also equal in size and opposite in direction, expressed by the formula:

[0028] Normal direction: ∑F=0, namely

[0029] ...

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Abstract

The invention discloses a centrifugal soil tangential adhesion friction test device and a test and calculation method thereof. The device is composed of a homogeneous rotating disc, a minimum single-chip microcomputer system, a connecting key, a speed regulating motor, a motor fixing frame and a fixing bolt. The minimum single-chip microcomputer system is fixedly arranged on the homogeneous rotating disc. The homogeneous rotating disc is fixedly arranged on the upper end of the speed regulating motor through the connecting key. The speed regulating motor is fixedly arranged on the motor fixing frame. The fixing frame is fixed on a work surface. The method of recording the state that soil is separated from a soil touch test piece along the tangential direction of circular movement on the soil touch test piece can be realized. Current between the upper and lower ends of wet clay is measured by using the single-chip microcomputer, and the tangential adhesion friction between the tested soil and the soil touch test piece can be calculated by recording the rotating speed of the motor when the soil is separated from the soil touch piece according to a tangential adhesion friction calculation formula. Testing of the tangential adhesion friction between the soil of different properties and parameters and different soil touch materials can be realized.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a centrifugal soil tangential adhesion friction test device and a test calculation method thereof. Background technique [0002] In daily life and work, especially in the process of agricultural production and engineering construction, when the relative movement between the soil and the soil-contacting parts of the ground machinery occurs along the tangential direction of the contact surface, that is, when the soil moves along the surface of the soil-contacting parts of the machine, such as The soil moves along the contact surface of the plow wall, bulldozer, excavator bucket, scraper bucket, etc.; or when the surface of the soil-contacting parts of the machine moves along the soil, such as the opener, plow bottom, hoe, shovel, etc. The adhesion resistance of the soil to the soil-contacting parts of the machine tool is the tangential adhesion friction force of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00
CPCG01L5/0028
Inventor 李俊伟马云海王慧鑫禹江涛周志刚毛春昱石要武端木令坚
Owner JILIN UNIV
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