Compressor blade
A technology of compressors and blades, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of complex working environment of blades, affecting blade strength and life, and prone to flutter, etc., and achieves small additional mass and reliable High performance and high effect
Active Publication Date: 2015-12-23
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
In addition, when the steam turbine works under various non-design conditions, such as start-up, low load, shutdown, variable load, high back pressure, etc., the blades also have to bear the alternating stress caused by the load change and the relatively high pressure under the small volume condition. Atmospheric flow excitation force, etc., the above various loads make the working environment of the blade even more complicated
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[0051] See attached Figure 1-3 , with figure 1 A schematic diagram of the local structure of the compressor blisk of the present invention is disclosed, with figure 2 Disclosed is a schematic structural view of a single blade in a compressor bliss disk of the present invention, with image 3It is a structural sectional view of a single blade of the present invention. In this embodiment, three damping rings 1 are installed on the single blade. In the schematic diagram, the blade 4 and the rim 3 are integrally formed, a groove 2 is processed on the rim 3, the damping ring 1 is partially embedded in the groove 2, and the groove 2 The quantity is consistent with the quantity of the damping ring 1 . One and two damping rings 1 are installed upstream and downstream of the second structure part 32 of the rim 3 respectively, and the sections of the damping ring 1 and the groove 2 are rectangular.
[0052] Such as Figure 4 Shown is a schematic diagram of the structure of an op...
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The invention provides a compressor blade. The compressor blade comprises a rim, a damping ring and a groove formed in the rim. Part of the damping ring is embedded in the groove, and therefore the damping ring is fixed to the rim. The two side faces of the groove and the two side faces of the damping ring are in interference fit, and the damping ring is located on the inner side of the rim. The damping ring embedded in the groove in the inner side of the rim of a blade disk is subjected to the appropriate positive pressure through centrifugal force generated during high-speed rotating of the blade disk. The blade generates vibration after being subjected to airflow exciting force, energy is consumed due to the sticking-sliding movement between the groove of the rim and the damping ring, and the blade vibration of the blade disk and the blade under the strong coupling mode is effectively reduced. Compared with a current processing method for blade friction damping, the blade is not in direct contact and does not need to be machined, and only one narrow groove needs to be machined in the rim. The compressor blade has the beneficial effects of being simple in technology, convenient to install, small in additional mass, simple in design and high in reliability.
Description
technical field [0001] In particular, the invention relates to a compressor blade. Background technique [0002] Steam turbine is a kind of turbomachinery, which is a rotary power machine that converts the energy of steam into mechanical work, and is one of the main equipment of steam power plant. Steam turbines are widely used in various social and economic sectors, such as aviation, large-scale firepower, hydraulic power, nuclear power generation equipment and new energy utilization. At present, steam turbines are developing in the direction of high parameters, high performance and high reliability. Blades undertake the important task of converting steam heat energy into mechanical energy in steam turbines, and are one of the most important components in steam turbines. Therefore, with the improvement of the performance of the steam turbine, the blades, which are the heart of the steam turbine, are facing great challenges, and their working environment will be even worse...
Claims
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IPC IPC(8): F04D29/28F04D29/66
Inventor 黄修长华宏星
Owner SHANGHAI JIAO TONG UNIV