Blade rocker arm structure with function of lengthening blade rotating shaft
A technology of rotating shafts and blades, applied in the field of aero-engine turbine structure design, can solve problems such as inability to adjust and large frictional resistance
Pending Publication Date: 2022-03-25
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
[0006] The purpose of this application is to provide a blade rocker arm structure with the function of lengthening the blade rotation shaft to solve the problem that the turbine guide blades in the prior art cannot be adjusted due to excessive frictional resistance
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[0023] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application.
[0024] A blade rocker structure with the function of strengthening the blade rotation shaft, such as figure 2 As shown, according to the analysis of the blade rotating shaft 21 according to the balance of force, it can be seen that F1=F*L2 / L1, when the aerodynamic force F and the force L2 of the aerodynamic force on the blade body of the turbine guide vane 1 remain unchanged, the increase The distance L1 between points A and B where the rotating shaft 21 of the turbine guide vane 1 contacts with the housing can reduce the frictional force.
[0025] like image 3 , Figure 4 As shown, it includes the turbine guide vane 1, the second turbine case 7 clamped on the rotating shaft 21 of the turbine guide vane ...
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The invention belongs to the field of aero-engine turbine structure design, and relates to a blade rocker arm structure with a blade rotating shaft lengthening function, the blade rocker arm structure comprises a turbine guide blade, a second turbine casing and a compression nut, and the second turbine casing comprises a fixing part and an arc-shaped part arranged on the side, close to the compression nut, of the fixing part; the interior of the fixing part is coaxial with a rotating shaft on the guide blade; a lengthened lining is arranged between the second turbine casing and the rotating shaft and comprises a connecting sleeve and a pressing sleeve, and the pressing sleeve is tightly attached to the arc-shaped part. A lengthened rocker arm is arranged between the compression nut and the rotating shaft and comprises a rotating sleeve and a stress sleeve, and the stress sleeve is tightly attached to the compression sleeve, so that acting force F1 originally acting on the rotating shaft moves towards the side close to the compression nut under the tight fit of the lengthened lining and the lengthened rocker arm, a force arm L1 of the acting force F1 is lengthened, and aerodynamic force F1 is greatly small. And the friction force at the rotating shaft on the turbine guide blade is obviously reduced.
Description
technical field [0001] The application belongs to the field of aero-engine turbine structure design, and in particular relates to a blade rocker arm structure with the function of lengthening the blade rotating shaft. Background technique [0002] The variable geometry turbine is one of the core components of an advanced aero-engine. It can control the flow capacity of the turbine by changing the throat area of the turbine guide, adjust the matching operating point of the engine, and achieve the optimal performance of the engine under multiple operating conditions. At present, the most effective way to change the throat area of the turbine guide is to connect the rotating shaft of the turbine guide vane through the blade rocker arm on the adjustment mechanism, so as to drive the guide vane body to rotate and change the installation angle of the guide vane. The existing turbine guide vanes and turbine guide vane rocking arms related to the present invention are generally ...
Claims
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Login to View More IPC IPC(8): F01D9/02F01D25/00
CPCF01D9/02F01D25/00
Inventor 左铭李东彪赵巍
Owner AECC SHENYANG ENGINE RES INST