Device for measuring water film distribution change rule in pressurization process and testing method

Abstract

The invention provides a device and a test method for determining a water film distribution change rule in a pressurization process. The device comprises a test rack, a base, a hand wheel, a lifting platform, a soil body, a dial indicator, a base plate, a plastic plate, a chip, an electrode plate, a sample cylinder, a lead a, a lead b, a piston and a plastic bearing platform, the interior of the electrode plate is divided into a plurality of metal blocks according to radial distribution, and the metal blocks are separated by electrical insulating materials; the chip is placed on the upper surface of the electrode plate and plays a role in controlling each metal block of the electrode plate to circularly supply power; according to the device, the electrode plate is divided into independent test units, and the water film areas of corresponding positions are respectively tested, so that the water film distribution condition below the electrode plate is determined; the method provides an analysis basis for researching the bond growth rule between the soil-metal interfaces in the pressurization process, and provides a theoretical support for viscosity reduction and resistance reduction of mechanical construction in a clay stratum.

Description

technical field [0001] The invention belongs to the technical field of reducing viscosity and resistance in agricultural machinery construction, and particularly relates to a device and a testing method for measuring the variation law of water film distribution in a pressurizing process. Background technique [0002] The adhesion of wet and sticky soil to the soil-contacting parts of ground machinery is a common problem, which seriously affects the working efficiency of ground machinery. Fundamentally, soil adhesion is an interfacial phenomenon that results from physical, chemical and mechanical interactions between soil-contacting components and soil. For a long time, people have studied the mechanism of soil adhesion from different angles, and put forward various theories and theories, such as Foutaine's water tension theory, Zisman's capillary theory, Fisher's water film medium theory and so on. A large number of research results show that the soil adhesion mainly depend...

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Problems solved by technology

However, this method cannot obtain the distribution law of the water film on the soil-metal interface, so it is impossible to determine the migration of water in the soil to different positions on the interface and accumulate into a water film during the pressurization process, and it is also impossible to determine the growth law of the adhesion force at different positions on the interface. It is neither possible to reveal the mechanism of adhesion growth at the interface from the perspective of water film distribution evolution, nor to establish a quantitative model for the relationship between interfacial adhesion growth and interfacial water film distribution.

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