A 90° Large Angle of Attack Device for a Subtransonic Wind Tunnel
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A technology with supersonic speed and large angle of attack, which is applied in the direction of measuring devices, testing of machines/structural components, instruments, etc., and can solve problems such as large blocking ratio, large space occupied by joints and arc-shaped scimitar tail supports, and complex structures of multiple joints. , to achieve the effect of a large range of attack angles
Active Publication Date: 2020-12-18
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Although this structure can continuously achieve a 90° angle of attack, the joint structure is complex, and the joints and the arc-shaped scimitar tail support take up a lot of space, resulting in a large blocking ratio, and the length of the test model is relatively small compared to the size of the test section
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[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples: but the examples are not limitations of the present invention. The content that is not described in detail in the description of the present invention belongs to the well-known technology of those skilled in the art.
[0050] Such as Figure 1-Figure 3 As shown, a 90° large angle of attack mechanism includes a lower base plate 1, a stopper 2, a column 3, an upper base plate 4, a servo motor reducer assembly 5, a main output gear 6, a large diameter gear 7, and a main screw nut Assembly 8, auxiliary screw nut assembly 9, small diameter gear 10, vertical bevel gear assembly 11, horizontal bevel gear assembly 12, counterweight assembly 13, auxiliary screw adapter assembly 14, main screw adapter assembly 15, tie rod 16. Oil cup 17, pull wire sensor assembly 18, sealing plate 19, pipeline assembly 20, support arm 21, support rod 22, pipe joint...
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Abstract
The invention discloses a sub-span supersonic speed wind tunnel 90-degree large attack angle device. The device comprises a lower bottom plate, limiting stoppers, vertical columns, an upper bottom plate, a servo motor speed reducer assembly, a main output gear, a large-diameter gear, a main lead screw assembly, an auxiliary lead screw assembly, a small-diameter gear, a vertical bevel gear assembly, a horizontal bevel gear assembly, a counterweight assembly, an auxiliary lead screw adapter assembly, a main lead screw adapter assembly, a pull rod, an oil cup, a wire drawing sensor assembly, sealing plates, a pipeline assembly, a supporting arm, a connecting rod, a pipe joint assembly, a supporting section, a balance model supporting rod assembly, linear guide rails, a sliding block support assembly and a false supporting rod. The device has advantages of being reasonable and simple in structure, convenient to install, high in precision, small in blocking degree, large in testing model, high in testing efficiency, low in cost, realizable in large range of attack angle, and the requirement for running of the attack angle with 90-degree and even 120-degree wide-range of the wind tunnelcan be met.
Description
technical field [0001] The invention relates to a large attack angle mechanical mechanism applied to a subtransonic wind tunnel, and belongs to the field of experimental aerodynamics. Mainly through the differential drive of the gear set to drive the pull rod to realize the rotation of the support section around the arm, to obtain different angles of attack of the models on the bracket, and to feed back the angle of attack angle through the potentiometer of the pull wire sensor. This mechanism can use the inverse motion of the eccentric crank slider mechanism to accurately Realize a wide range of angle of attack ranging from -15° to 90° or even 120°, with a control accuracy of 3'. And can be collected in real time. Background technique [0002] With the rapid development of military science and technology, the requirements for mobility in the design of new missiles and aircraft are getting higher and higher, and the flight boundaries of modern aircraft and missiles have bee...
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