A Pre-spin Supercharged Rotor Disk Structure for Wheel Rim Sealing
A technology of sealing structure and rotor disc, which is applied in the direction of supporting components of blades, machines/engines, and leakage prevention, etc., and can solve problems such as damage to the safe and reliable operation of the whole machine, damage to the cooling effect of the disc cavity, and loss of efficiency of the whole machine.
Active Publication Date: 2019-05-10
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
Studies have shown that gas intrusion phenomenon is an important factor leading to the overheating failure of the turbine disk. The occurrence of the intrusion phenomenon will destroy the cooling effect of the disk cavity, damage the safe and reliable operation of the whole machine, and at the same time cause the loss of the efficiency of the whole machine
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Embodiment Construction
[0016] This embodiment is a pre-swirl supercharged rotor disc structure for wheel flange sealing.
[0017] Refer to figure 1 , figure 2 In this embodiment, the pre-swirl supercharged rotor disk structure for rim sealing includes a pre-swirl supercharger device 1, a rim sealing structure 3, and a flow channel is formed by adding a plurality of baffles on the surface of the rotor disk. It is a Fibonacci spiral structure; multiple Fibonacci spiral baffles and the flow channels formed by them form the pre-swirl booster device 1. In this embodiment, the inlet of the pre-swirl booster device 1 is a part of the inlet of the rotating static disk cavity 2. The part of the sealed airflow close to the rotor enters the pre-swirl booster device 1, and the outlet of the pre-swirl booster device 1 faces the rim The entrance of the sealing structure 3.
[0018] In this embodiment, the height of the Fibonacci spiral baffle gradually increases with the extension of the radial position. The inlet ...
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The invention discloses a prewhirl and pressurizing rotor disc structure for wheel rim sealing. A plurality of baffles are additionally installed on the disc face of a rotor disc, so that flowing channels are formed, and the baffles are in a Fibonacci spiral line shape; and the multiple Fibonacci-spiral-line-shaped baffles and the flowing channels formed by the baffles form a prewhirl pressurizing device. The flowing channels formed by the Fibonacci-spiral-line-shaped baffles gradually expand from inlets to outlets, so that decelerating and pressurizing are achieved. Sealing airflow entering in the radial direction flows out from the outlets at a tangential speed through the flowing channels formed by the Fibonacci-spiral-line-shaped baffles, pressurizing and prewhirl can be conducted on the sealing airflow close to the rotor disc, and moreover, high-pressure high-tangential-speed sealing airflow enters the wheel rim sealing structure through the flowing direction of sealing airflow on a bottom baffle control part of the wheel rim sealing structure. The fuel gas intrusion degree can be decreased, the temperature of a turbine disc can be lowered, the heat transfer stability of the turbine disc can be improved, moreover, the sealing airflow loss caused by interaction between the outlet flow and the main flow can be reduced, and the efficiency of a whole machine can be improved.
Description
Technical field [0001] The invention relates to the technical field of gas turbine turbines, in particular to a pre-swirl supercharged rotor disc structure used for wheel flange sealing. Background technique [0002] There is an annular cavity between the turbine turntable and the stationary parts of the gas turbine, called the turbine disc cavity. The gas intrusion in the turbine disc cavity refers to: the friction pump effect caused by the rotation of the turbine disc will continuously pump out the air in the disc cavity to make the cavity Under the action of the friction pump effect, when the pumping flow is greater than the cooling air supply flow, gas intrusion will occur at the rim of the turbine disc, that is, the main gas will enter the disc cavity; the mutual interference of the stators in the main flow channel , Causing the circumferential pressure of the main gas to fluctuate, and also form gas intrusion at the rim of the turbine disc. Studies have shown that gas intr...
Claims
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IPC IPC(8): F01D5/02F01D11/06
CPCF01D5/02F01D11/06F05D2220/32F05D2240/20F05D2240/55
Inventor 王占学杨帆周莉张晓博
Owner NORTHWESTERN POLYTECHNICAL UNIV