Simple device for realizing wide-range flow field displacement measurement in limited space

Abstract

The invention belongs to the field of wind tunnel structure design, and particularly relates to a simple device for realizing large-range flow field displacement measurement in a limited space. The slotted steel pipe of the device adopts a multi-section splicing form, and flanges are arranged at the two ends of the slotted steel pipe. The sliding block and the probe are welded into a whole, the probe is clamped in a steel pipe groove, and the sliding block is in loose fit with the inner wall face of the steel pipe. One end of the connecting rod is connected with the sliding block, and the other end of the connecting rod penetrates through the sealing disc and moves to a designated position through manual assistance during measurement. The connecting rod is formed by assembling a plurality of sections, and the supporting disc is installed between the two sections of connecting rods. One end of the pipeline is in interference connection with the probe, and the other end sequentially penetrates through the supporting disc to be led out of the hole wall from the sealing disc to be connected with a total pressure measuring instrument or a total temperature measuring instrument. The sealing disc is provided with a cavity, and the detached supporting disc can be contained in the cavity. The sealing disc, the connecting rod and the pipeline are sealed through vacuum sealing mud or sealing rings. The device is simple in structure, low in manufacturing cost, easy to install and good in adaptability under the condition that the lateral installation space is limited.

Description

technical field [0001] The invention belongs to the field of wind tunnel structure design, and in particular relates to a simple device for realizing large-scale flow field displacement measurement in a limited space. Background technique [0002] The calibration device is a special measuring device for obtaining the characteristic parameters of the overall flow field. The size of modern low-speed wind tunnels and industrial pipelines is getting larger and larger, and the design difficulty and manufacturing cost of their flow field calibration devices are also getting higher and higher. The measurement of the total air pressure and total temperature is particularly complicated. At present, the common flow field calibration and measurement devices use racks or manipulators. Although these measurement methods are highly automated and easy to operate, they also have many shortcomings. The main disadvantages of bent racks are: the number of measuring points is fixed and cannot ...

AI Technical Summary

Problems solved by technology

The size of modern low-speed wind tunnels and industrial pipelines is getting larger and larger, and the design difficulty and manufacturing cost of their flow field calibration devices are also getting higher and higher. Among them, the measurement of total air pressure and total temperature is particularly complicated

At present, the common flow field calibration and measurement devices use racks or manipulators. Although these measurement methods are highly automated and easy to operate, they also have many shortcomings.

The main disadvantages of bent racks are: the number of measuring points is fixed and cannot be adjusted; the number of lead wires is large, and it is difficult to ensure the airtightness of each measuring point; the size is large, and it is difficult to transport and install in a limited space

The disadvantage of the manipulator is that the manipulator integrates an electric drive device, the system is complex, the cost is high, and the installation and commissioning cycle is long

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