Rotary drum type fluid friction resistance tester

Abstract

The invention relates to a rotary drum type fluid friction resistance tester. A speed regulating motor and a torque sensor are fixed on a cantilever-shaped mounting plate of a support, the speed regulating motor is vertically arranged, the lower end of an output shaft of the speed regulating motor is vertically connected a hollow rotating shaft, the lower end of the hollow rotating shaft is connected with an outer rotary drum of coaxial rotary drums, the upper end of the rotating shaft is connected with the torque sensor, and the lower end of the rotating shaft is connected with an inner rotary drum of the coaxial rotary drums. The coaxial rotary drums are arranged in a constant-temperature sample cup placed under the coaxial rotary drums and immersed in fluid in the cup. The constant-temperature sample cup comprises a temperature sensor and a heating device, the temperature sensor, the heating device, the torque sensor and the speed regulating motor are all connected with a single chip microcomputer of a digital processing device, and the single chip microcomputer is connected with a computer and a displayer. A sample board is pasted on the inner side wall face of the outer rotary drum. The tester is simple in structure, a tested sample can be manufactured easily, testing is simple and convenient, precision is high, stability and reliability are good, and the tester can be conveniently and reliably used for resistance testing analysis and assessment of the fluid resistance reduction technology and the resistance reduction effect.

Description

technical field [0001] The invention relates to a drum-type fluid friction resistance tester, in particular to a fluid friction resistance tester for measuring the wall surface of a sample at different flow rates and different surface textures. Background technique [0002] In production, life and scientific research, the long-distance transportation of liquids, and the movement of ships and underwater vehicles in the water cause a large amount of energy consumption due to overcoming the resistance of travel, which in turn leads to a significant reduction in efficiency. Therefore, in order to carry out resistance test analysis and reduce the exploration of fluid resistance, a frictional resistance measurement device that can evaluate fluid to different surface texture structures is designed, which is helpful for saving energy, improving work efficiency, improving and optimizing the working process, improving ship and underwater The navigation speed and endurance of aircraft ...

AI Technical Summary

Problems solved by technology

[0003] At present, many domestic and foreign universities or research institutes mostly use experimental devices such as water holes and water tanks to test fluid resistance. Such experimental devices have complex structures, difficult control of experimental conditions, large space occupation, and high cost; existing water tank experiments The device is limited by the length of the drag pool and is expensive

A search of the existing patent technology literature found that the following are related to this patent: a test device for fluid friction resistance on the wall surface of a circular cross-section sample designed by Wang Jiadao of Tsinghua University and others (patent publication number: CN101050995), the device The structure is relatively complex, the processing is inconvenient, and the measurement results are easily affected by the change of ambient temperature

A resistance test device (patent publication number: CN102998087A) invented by Zhao Gang and others from Harbin Engineering University is suitable for jet surfaces and non-smooth surfaces. Larger etc.

The device for testing the movement and resistance of marine structures of ships (patent publication number: CN102636331A) invented by Guo Chunyu and others from Harbin Engineering University has complex structure, cumbersome operation, high cost and single function

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