A structure that prevents the connecting parts from stirring the airflow to heat up

Abstract

The application belongs to the field of connecting structures of aero-engines, and in particular relates to a structure for preventing the heating of the agitated air flow of the connecting parts. It includes: a first rotor part, a second rotor part, a sheath and a flexible clamp. The first rotor part is provided with a first mounting edge, and a first semicircular groove is opened on the first mounting edge; the second rotor part is connected with the first rotor part through a connecting part; the cross section of the sheath is L-shaped, and is arranged on the connecting part One side of the side plate abuts against the mounting edge of the first rotor part, the side plate is provided with a second semicircular groove corresponding to the first semicircular groove and a mounting hole corresponding to the second semicircular groove, and the other side of the sheath One side plate abuts against the second rotor part; the flexible clip is inserted into the full-circle groove formed by the first semicircular groove and the second semicircular groove through the installation hole on the sheath, and the sheath is connected with the first rotor part and the second rotor part position. In this application, by increasing the sheath structure, the protruding part of the connecting piece avoids the agitation and heating effect of the airflow, and improves the temperature field of the rotor part under the working state.

Description

technical field [0001] The application belongs to the field of connecting structures of aero-engines, and in particular relates to a structure for preventing the heating of the agitated air flow of the connecting parts. Background technique [0002] At present, in the structural design of aero-engines in my country, a large number of bolts, nuts, and screws are used in the connection form, and the friction between the bolt head and the nut and the surface of the part is used, and anti-rotation devices such as locking plates and locking wires are used to ensure the stability of the connection. This method is characterized by simple structure and low difficulty in assembly and disassembly. However, compared with other connection forms such as welding and riveting, the bolted connection on the rotor part protrudes from the axial end face of the connected parts due to the bolt head, nut, screw rod, etc., and there is a stirring effect on the air flow during the rotation process. ...

AI Technical Summary

Problems solved by technology

However, compared with other connection forms such as welding and riveting, the bolted connection on the rotor part protrudes from the axial end face of the connected parts due to the bolt head, nut, screw rod, etc., and there is a stirring effect on the air flow during the rotation process. For the air system, There is a certain influence on the temperature field

[0003] At present, in the field of aero-engine design in my country, no effective protection and suppression has been made to the adverse effects of such agitation and heating effects.

From a technical point of view, if the stirring and heating effect of bolts, nuts and other connecting parts is not protected or suppressed, the ambient temperature of the connected parts will rise under the working state, and the ambient temperature under the working state will increase, which will bring greater damage to the parts. The thermal load and thermal stress will bring more severe tests to the strength reserve and life reserve of the parts. After a long time of use, the creep tendency of the parts may be aggravated. In extreme cases, the parts may also cause structural damage that endangers the safety of the engine. , and may increase engine maintenance costs

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