A wheel rim sealing structure with wavy slot spraying on the rim plate
A sealed structure, wave-shaped technology, applied in the direction of machine/engine, leakage prevention, mechanical equipment, etc., can solve problems such as loss of efficiency of the whole machine, damage to the cooling effect of the disk cavity, damage to the safe and reliable operation of the whole machine, etc.
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 cause the loss of the efficiency of the whole machine at the same time
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Embodiment Construction
[0019] This embodiment is a wheel rim sealing structure sprayed with wavy grooves on the rim plate.
[0020] refer to figure 1 , figure 2 , image 3 , the rim sealing structure of the wavy grooved injection of the flange plate in this embodiment, the wavy grooving injection device 2 is located inside the rim sealing structure 3; the wavy grooving injection device 2 is divided into the air intake part of the wavy grooved injection device 8 and the air outlet part 9 of the wave-shaped grooved injection device, the air inlet part 8 of the wave-shaped grooved injection device is an air inlet hole distributed along the circumferential direction, and the air outlet part 9 of the wave-shaped grooved injection device is an air outlet groove distributed in the circumferential direction. The inlet of the air inlet part 8 of the wave-shaped grooved injection device is located at the bottom of the rotating part of the rim seal structure 3, and the inlet position of the air inlet part o...
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The invention discloses a turbine margin seal structure adopting spraying through wavy notches in a margin plate. A wavy notch spraying device is located in a turbine margin seal structure body; an inlet of the air inlet portion of the wavy notch spraying device is located at the bottom of the rotating portion of the turbine margin seal structure body and is close to the rotating wall surface of arotor disc; an outlet of the air outlet portion of the wavy notch spraying device is located on the margin plate of the turbine margin seal structure body, and wavy circumferentially-distributed spraying is formed on the margin plate; and by utilizing a seal air flow brought by the rotor disc rotating wall face friction pump effect, fuel gas invasion caused by the friction pump effect is weakened. Through wavy notch design, the extracted seal air flow is sprayed out at different circumferential positions, flowing resistance is simultaneously generated for fuel gas invasion and outflow seal, and thus the extent of fuel gas invasion is decreased, the temperature of a turbine disc is decreased, the extent of outflow seal is decreased, the influence of outflow seal on a main flow is weakened,and engineering application value on improvement of the heat transfer stability of the turbine disc and the overall efficiency is achieved.
Description
technical field [0001] The invention relates to the technical field of gas turbines, in particular to a rim sealing structure of wavy slotted injection on a rim plate. Background technique [0002] There is an annular chamber called the turbine disk cavity between the turbine rotating disk and the stationary parts of the gas turbine. The gas intrusion into the turbine disk cavity means that the friction pump effect caused by the rotation of the turbine disk will continuously pump out the air in the disk cavity, making the gas in the cavity Under the action of the friction pump effect, when the pumping flow is greater than the supply flow of cold air, gas intrusion will occur at the rim of the turbine disk, that is, the main gas will enter the disk cavity; the mutual interference of the rotor and stator in the main channel , causing the circumferential pressure fluctuation of the main gas, and also forming gas intrusion at the rim of the turbine disk. Studies have shown that...
Claims
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IPC IPC(8): F01D11/10
Inventor 杨帆周莉王占学史经纬
Owner NORTHWESTERN POLYTECHNICAL UNIV