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Variable Mach number nozzle mechanism having large-stroke range and high precision

A high-precision, large-stroke technology, applied in the direction of engine testing, machine/structural component testing, measuring devices, etc., can solve the problems of lack of research on high-precision adjustment mechanisms, and achieve simple structure, guaranteed airflow quality, and convenient operation Effect

Inactive Publication Date: 2017-04-26
CHINA GAS TURBINE ESTAB
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the research on the high-precision adjustment mechanism of its profile movement is relatively lacking.

Method used

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  • Variable Mach number nozzle mechanism having large-stroke range and high precision
  • Variable Mach number nozzle mechanism having large-stroke range and high precision

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The working process of the nozzle is as follows: the roller screw electric cylinder 7 drives the rotating support plate 2 to move; the rotating support plate 2 rotates precisely along the rotation center N under the action of the arc rolling slider 3 and the smooth guide rail 5 ; The fixed profile section 1-1 of the rigid-flexible coupling profile 1 rotates with the rotating support plate 2, and drives the flexible profile section 1-2 to deform around the rotation center N, and the straight section 1-3 at the outlet remains basically unchanged, Therefore, the throat height adjustment of the profile mechanism is realized, and the Mach number adjustment of the nozzle outlet is realized.

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Abstract

The invention relates to a variable Mach number nozzle mechanism having large-stroke range and high precision. The mechanism includes a rigid-flexible coupling profile 1, a rotation support plate 2, an arc rolling sliding block 3, a support plate hinge 4, a smooth guide rail 5, a sealing supporting plate 6, a ballscrew electric cylinder 7, an electric cylinder hinge 8, and a nozzle fixing rack 9, wherein the rigid-flexible coupling profile 1 includes a fixed profile section 1-1, a flexible profile section 1-2, and an exit straightening section 1-3. According to the invention, the mechanism has a simple and compact structure, and overcomes low control precision caused by multiple procedures, such as force transmission, machining and assembling, etc. The mechanism combines the rolling arch guide rail and a ballscrew electric cylinder, which effectively guarantees non-linear control precision and repeatability. The mechanism achieves continuous adjustment of Mach number, is tightly constructed, has strong practicality and allows easy engineering and design for thermal protection and pneumatic sealing.

Description

technical field [0001] The invention belongs to a test equipment design technology for a wind tunnel test or aero-engine high-altitude bench aerodynamic test, in particular to a large-stroke range and high-precision Mach-number-changing mechanism for a nozzle. Background technique [0002] The free jet test is an important means of simulating the high-altitude intake port-engine matching test. The function of the air intake device is to make the airflow passing through the device reach the Mach number, total pressure, Airflow angle and other parameters. The free jet air intake device is referred to as the nozzle, which is the core section for establishing the free jet flow field. The quality of its design directly determines the flow field quality of the free jet, determines the reliability and accuracy of the free jet test data, and determines the free jet flow field. The test capability of the jet and the operating efficiency of the chamber. [0003] Due to the limitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/04G01M15/02
CPCG01M9/04G01M15/02
Inventor 吴锋陈鹏飞田金虎乔彦平王娟娟
Owner CHINA GAS TURBINE ESTAB
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