Damping characteristic experiment device for saw-toothed triple-mounted shrouded blade
An experimental device and saw-tooth-shaped technology, applied in the field of aero-engines, can solve the problems that the engineering applicability of theoretical analysis results is difficult to be verified, and achieve the effect of reasonable structure
Active Publication Date: 2013-09-18
BEIHANG UNIV
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Problems solved by technology
At present, scholars at home and abroad have carried out theoretical analysis and experimental verification on the vibration reduction law of shrouded blades, and have achieved certain results, but most of them are theoretical and mechanism studies. Due to the differences between theoretical assumptions and actual models, the results of theoretical analysis It is difficult to verify the engineering applicability of
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[0020] The present invention will be further described below in conjunction with accompanying drawing.
[0021] The present invention is a sawtooth-shaped triple-installed shrouded vane damping characteristic experimental device, comprising a shrouded blade 1, a clamping mechanism 2 and a loading mechanism 3, such as figure 1 shown.
[0022] Among them, the shroud 101 of the shrouded blade 1 adopts a zigzag structure, and the pre-twisted angle and contact angle of the shroud 101 are designed according to the needs of the experiment; ; In order to ensure the verticality and rigidity of the blade body 102 and the blade crown 101, the top of the blade body 102 is inserted through holes on the blade crown 101, and fixed by spot welding; three crowned blades 1 are vertically arranged, and are clamped The holding mechanism 2 is fixed, and after being fixed, three adjacent blade crowns 101 are in close contact. Thus, the real contact state of three adjacent shrouded blades in the e...
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The invention discloses a damping characteristic experiment device for a saw-toothed triple-mounted shrouded blade, which is used for researching the damping characteristics of the shrouded blade at different contact angles and pre-twisting angles and under different contact positive pressures. The damping characteristic experiment device comprises shrouded blades, a clamping mechanism and a loading mechanism, wherein three shrouded blades are arranged vertically; the integral tip shrouds of the blades are the same in height, and are in tight contact with one another after being fixed via the clamping mechanism; the loading mechanism is arranged above the clamping mechanism; the loading mechanism comprises a loading disk and friction blocks; the loading disk is arranged horizontally, and is provided with an integral tip shroud outlet through which the integral tip shrouds of the three shrouded blades extend; two friction blocks are positioned on left side and the right side of the integral tip shroud outlet; and the two friction blocks are fixed on the loading disk, and one ends of the two friction blocks are contacted with the friction surfaces of the integral tip shrouds in respective adjacent shrouded blades after fixing. The damping characteristic experiment device has the advantages of reasonable structure and capability of realizing damping characteristic measurement of the shrouded blades under different key parameters.
Description
technical field [0001] The invention relates to the field of aero-engines, in particular to an experimental device for vibration-damping characteristics of sawtooth triple-mounted shrouded blades in aero-engines, which is used to obtain the vibration-damping characteristics of shrouded blades. Background technique [0002] In an aero-engine, the turbine blade is one of the important components. In addition to bearing the impact of high-temperature and high-pressure gas during work, it will also cause high-cycle fatigue vibration of the blade due to cyclic loads such as centrifugal force and aerodynamic force. In order to reduce the vibration stress of engine blades, in addition to avoiding blade resonance and improving the fatigue resistance of blade materials, the damping of the blade system must also be increased. At present, the effect of dry friction damping is the most obvious, and its advantages are simple structure and strong environmental adaptability. Dry friction ...
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IPC IPC(8): G01M13/00
Inventor 樊江徐雨生韩乐
Owner BEIHANG UNIV