Centripetal turbine frequency modulation method, device and centripetal turbine
A turbine and centripetal technology, applied in parts, instruments, liquid fuel engines, etc. of pumping devices for elastic fluids, to reduce weight, reduce centrifugal load and aerodynamic axial force, reduce centrifugal load and aerodynamic axial force force effect
Active Publication Date: 2019-12-20
AECC HUNAN AVIATION POWERPLANT RES INST
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Problems solved by technology
[0004] The invention provides a centripetal turbine frequency modulation method, device and centripetal turbine to solve the technical problem that there is no effective measure in the prior art to adjust the high-order natural frequency of the centripetal turbine
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[0068] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0069] see Figure 4 , the preferred embodiment of the present invention provides a centripetal turbine frequency modulation method, which is applied to the centripetal turbine to be tuned, such as figure 1 As shown, the centrifugal turbine to be tuned includes a wheel disc and a plurality of blades 1 arranged on the wheel disc. The plurality of blades 1 are evenly distributed on the side wall of the wheel disc. On the rim 3 of the outer circumference of the wheel disc, the connection between the blade 1 and the wheel disc is provided with a blade root rounding 4. The centripetal turbine frequency modulation method includes the steps:
[0070] Step S100 , partially hollowing out the rim betwe...
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The invention discloses a centripetal turbine frequency modulation method and device and a centripetal turbine. Rims, participating in vibration, between two adjacent blades of the centripetal turbine to be subject to frequency modulation are subject to partial hollowing treatment, and therefore the high order inherent frequency of the centripetal turbine to be subject to frequency modulation is adjusted. According to the centripetal turbine frequency modulation method and device and the centripetal turbine, the rims, participating in vibration, between the two adjacent blades of the centripetal turbine to be subject to frequency modulation are subject to partial hollowing treatment, and therefore the high order inherent frequency of the centripetal turbine to be subject to frequency modulation is adjusted, the adjusted high order inherent frequency and the shock excitation frequency form a certain frequency difference, resonance risks of the centripetal turbine are effectively avoided, the weight of the turbine is reduced, centrifugal loads and pneumatic axial force are reduced, and influences on the performance of the centripetal turbine are small. By means of the centripetal turbine frequency modulation method and device and the centripetal turbine, resonance can be effectively avoided, the centrifugal loads and pneumatic axial force are reduced, the weight is small, and influences on the performance are small.
Description
technical field [0001] The invention relates to the field of centripetal turbines, in particular to a centripetal turbine frequency modulation method and device, and a centripetal turbine. Background technique [0002] The centripetal turbine is a radial intake and axial exhaust turbine, which has the characteristics of small geometric size, compact structure and high power. The impeller shape of the centripetal turbine is very similar to that of the centrifugal compressor impeller, but it is different in structure and flow field. The auxiliary power of various types of small and medium aero-engines at home and abroad mostly uses centripetal turbines. For the centripetal turbine High-order resonances have not attracted enough attention before. However, with the development of technology, people gradually realize that some high-order resonances may cause structural damage. When the excitation source cannot be adjusted, it is necessary to conduct high-level research on the cen...
Claims
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IPC IPC(8): F04D29/26F04D29/66G06F17/50
CPCF04D29/284F04D29/666G06F30/20
Inventor 张红晓郭培培袁巍王建方
Owner AECC HUNAN AVIATION POWERPLANT RES INST