High-precision balance for measuring resistance of water tunnel

A high-precision, balance technology, applied in the field of high-precision water tunnel resistance measurement balance, can solve the problems that the accuracy is greatly affected by the ambient temperature and humidity, the requirements are high, and the accuracy cannot meet the requirements, etc.

Inactive Publication Date: 2010-09-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strain balance has the advantages of light weight, fast response, and simple design and processing, but this kind of balance has high requirements for environmental factors such as temperature and humidity. In water tunnel experiments, its accuracy is greatly affected by ambient temperature and humidity.
[0005]...

Method used

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  • High-precision balance for measuring resistance of water tunnel
  • High-precision balance for measuring resistance of water tunnel
  • High-precision balance for measuring resistance of water tunnel

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Embodiment Construction

[0018] figure 1 It is a schematic diagram of the high-precision water tunnel resistance measurement balance of the present invention. The resistance measurement balance support 1 and the sensor support 8 are inverted L-shaped, the material is 2Cr13 stainless steel, and they are connected to the water hole cover plate 6 through four M8 bolts distributed in a circular array. The elastic deformation beam 2 is processed by No. 45 steel, and the studs of 30×M20 are processed on the right side of the platform stage with a diameter of 28 mm and a length of 5 mm at its right end, and the M20 studs at the right end of the elastic deformation beam 2 pass through the balance bracket 1 for 20 through the through hole, and fasten the connection with the through hole of φ20 on the balance support 1 through the nut of M20. The resistance measured by this balance is in the horizontal direction. In order to avoid the interference of forces in other directions, the left end of the elastic def...

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Abstract

The invention discloses a high-precision balance for measuring the resistance of a water tunnel, which comprises a balance bracket, an elastic deformation girder, a rigid connecting bracket, a non-magnetic beam, a magnetic telescopic displacement sensor, a magnetic needle and a sensor-mounting bracket. The resistance-measuring balance bracket and the sensor-mounting bracket are connected with a water tunnel cover plate, an M20 external bolt at the right end of the elastic deformation girder penetrates through a Phi 20 through hole on the balance bracket and fastened and connected by an M20 nut, the rigid connecting bracket and the elastic deformation girder are connected by two M6 bolts, and the magnetic needle is inlaid in a small hole at the left end of the non-magnetic beam in an interference way. The displacement of the small magnetic needle is measured by magnetic telescopic displacement sensor to indirectly measure the resistance of a water tunnel experimental model, and the high-precision balance for measuring the resistance of a water tunnel measures has the advantages of simple structure and high precision and can be widely applied to resistance comparison experiments of water tunnels.

Description

technical field [0001] The invention relates to a device for measuring fluid resistance, in particular to a high-precision water tunnel resistance measuring balance. Background technique [0002] At present, the conventional method used in fluid dynamic experiments is to use balance measurement, which can be divided into mechanical balance and strain balance according to its working principle. [0003] The mechanical balance is composed of a model support system, a model attitude mechanism, a force and moment decomposition mechanism, a force transmission system, a balance measuring element, a carriage and a balance measurement control system. It decomposes and transmits force through the mechanical components on the balance, and uses mechanical balance elements or force sensors to measure the hydrodynamic load acting on the model. The mechanical balance has a wide load measurement range, and at the same time can decompose the fluid dynamics on the model, and each measuring ...

Claims

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Application Information

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IPC IPC(8): G01M10/00
Inventor 胡海豹宋保维潘光吴文辉刘占一刘冠杉黄桥高肖智勇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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