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Turbine rotor device with reinforced cooling structure

A technology of turbine rotor and cooling structure, applied in the direction of blade support components, climate sustainability, engine components, etc. The service life of the small wheel and other issues can be achieved to reduce the temperature, reduce thermal stress, and reduce the effect of temperature gradient

Active Publication Date: 2021-09-07
BEIJING SNECMA SAIC TURBOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the turbine rotor of an aeroengine is usually a turbine disk and blades. The working temperature of the tenon of the turbine blade and the tenon and groove connection of the wheel disk can reach 900K or even higher. The turbine disk is a very important rotor part of the aeroengine. The transmission torque drives the engine to run. In the working state, the turbine disk bears complex thermal and mechanical loads, especially at the rim of the turbine disk. The tenon and groove are more sensitive to creep performance, which makes the temperature gradient on the wheel disc larger, resulting in greater thermal stress, and also reduces the stress level that the rim tenon and groove can withstand, reducing the service life of the wheel disc, and at the same time Determines the life of the overall structure of the turbine disk. At present, the traditional method of cooling the rim of the turbine disk is to ventilate and cool the gap between the mortise and tenon grooves. The cooling effect still cannot meet the continuous improvement of performance requirements of aero-engines.

Method used

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  • Turbine rotor device with reinforced cooling structure
  • Turbine rotor device with reinforced cooling structure
  • Turbine rotor device with reinforced cooling structure

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0033] refer to figure 1 — Figure 6 :

[0034] A turbine rotor device with a reinforced cooling structure, including a blade 1 and a disc 2 matched and connected by a fir tree-shaped tenon 110 and a tenon groove 21; the tenon 110 is provided with connected first tenons 111, second tenons tooth 112, the wheel disc 2 is provided with a first tenon groove 211 and a second tenon groove 212 respectively matched with the first tenon tooth 111 and the second tenon tooth 112, and the first tenon groove 211 is provided with a first The upper side wall 215 of the tenon groove is matched with the upper tooth surface 113 of the first tenon tooth. The upper tooth surface 114 is matched and fitted.

[0035] The mortise 21 is provided with large arcs whose radii are R1 and R2 respectively. The upper side walls 216 of the tenon and groove respectively form cavities with other tooth surfaces of the first tenon tooth and the second tenon tooth after they are attached to each other.

[003...

no. 2 example

[0045] refer to Figure 1-Figure 4 : A turbine rotor device with a reinforced cooling structure, including a blade 1 and a disc 2 that are matched and connected by a fir tree-shaped tenon 110 and a tenon groove 21; Tenon teeth 112, the wheel disc 2 is provided with a first tenon groove 211 and a second tenon groove 212 respectively matched with the first tenon teeth 111 and the second tenon teeth 112, and the first tenon groove 211 is provided with a first tenon groove 212 The upper side wall 215 of a mortise is matched with the upper tooth surface 113 of the first mortise, and the upper side wall 216 of the second mortise of the second mortise 212 is matched with the second mortise of the second mortise 112. The upper tooth surfaces 114 of the teeth are fitted together.

[0046] The mortise 21 is provided with large arcs whose radii are R1 and R2 respectively. The upper side walls 216 of the tenon and groove respectively form cavities with other tooth surfaces of the first ...

no. 3 example

[0054] refer to figure 1 , figure 2 , Figure 5 , Figure 6 :

[0055] A turbine rotor device with a reinforced cooling structure, including a blade 1 and a disc 2 matched and connected by a fir tree-shaped tenon 110 and a tenon groove 21; the tenon 110 is provided with connected first tenons 111, second tenons tooth 112, the wheel disc 2 is provided with a first tenon groove 211 and a second tenon groove 212 respectively matched with the first tenon tooth 111 and the second tenon tooth 112, and the first tenon groove 211 is provided with a first The upper side wall 215 of the tenon groove is matched with the upper tooth surface 113 of the first tenon tooth. The upper tooth surface 114 is matched and fitted.

[0056] The mortise 21 is provided with large arcs whose radii are R1 and R2 respectively. The upper side walls 216 of the tenon and groove respectively form cavities with other tooth surfaces of the first tenon tooth and the second tenon tooth after they are attac...

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Abstract

The invention relates to a turbine rotor device with a reinforced cooling structure. The turbine rotor device comprises blades and a wheel disc which are connected in a matched mode through fir-tree-shaped tenons and mortises; the bottom surface of each mortise is provided with a plurality of cooling devices which are arranged at intervals in a convex-concave mode, and gaps are formed between the cooling devices and the bottoms of tenon teeth of the corresponding tenons, so that the tops of the cooling devices do not make contact with the bottoms of the tenons all the time when a turbine rotor works, and the tenons and the mortise structures can freely expand in the working state. The flow volume requirement of cooling airflow is met, the heat exchange area of cold air is greatly increased, the cooling efficiency is effectively improved, the temperature of the rim of the wheel disc is reduced, and meanwhile, the temperature gradient on the whole wheel disc is reduced, so that the thermal stress on the wheel disc is reduced, the overall stress grade of the wheel disc is reduced, and the service life of the turbine wheel disc is longer.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a turbine rotor device with an enhanced cooling structure. Background technique [0002] At present, the turbine rotor of an aeroengine is usually a turbine disk and blades. The working temperature of the tenon of the turbine blade and the tenon and groove connection of the wheel disk can reach 900K or even higher. The turbine disk is a very important rotor part of the aeroengine. The transmission torque drives the engine to run. In the working state, the turbine disk bears complex thermal and mechanical loads, especially at the rim of the turbine disk. The tenon and groove are more sensitive to creep performance, which makes the temperature gradient on the wheel disc larger, resulting in greater thermal stress, and also reduces the stress level that the rim tenon and groove can withstand, reducing the service life of the wheel disc, and at the same time It determines the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/08
CPCF01D5/08F01D5/081Y02T50/60
Inventor 段入柯濮睿德
Owner BEIJING SNECMA SAIC TURBOTECH CO LTD
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