An adjustable internal and external force transmission mechanism

Abstract

The invention provides an adjustable inner and outer culvert force transmission mechanism, which includes a force transmission pin assembled on the outer culvert casing, and a power transmission groove between culverts fixed on the side of the inner casing, and the power transmission pin includes a fixedly connected adjustment plate and the pin shaft, the central axis of the adjusting disc is misaligned with the central axis of the pin shaft; the surface of the adjusting disc is provided with an arc-shaped through hole, which is used to fix the power transmission pin and the outer culvert casing through the bolt; the force transmission groove between the culverts is a The groove-shaped structure with side opening, and a waist-shaped hole is set at the bottom of the groove. The end of the pin shaft can enter and extend into the waist-shaped hole from the opening side of the power transmission groove between the culverts. The size of the waist-shaped hole is larger than the end of the pin shaft. The size of the pin shaft can move within the range limited by the waist hole. The invention realizes that the radial load transfer point of the power transmission pin can be adjusted along the axial direction of the engine, and can be finely adjusted in the circumferential direction, and increases the sealing performance of the joint between the power transmission mechanism and the external culvert casing, and improves the assembly of the force transmission mechanism at the same time and maintainability.

Description

technical field [0001] The present disclosure relates to the technical field of aero-engines, in particular to an adjustable internal and external force transmission mechanism. Background technique [0002] Aviation gas turbofan engines generally have two ducts, inner and outer. The annular space between the outer casing and the inner casing is called the outer casing. The outer casing and the inner casings are all engines. important components. Usually, one end of the outer casing is fixed on the outer ring installation edge of the intermediate casing (or intermediate casing) through the front mounting edge of the inner casing, and the other end of the outer casing is a larger cylinder, which is set on the inner casing. At this time, it is necessary to connect the inner casing and the outer casing with a mechanism to transfer the radial load of the inner casing to the outer casing in time, and at the same time carry out Support and protection. For this reason, it is usua...

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Problems solved by technology

[0004] The force transmission method of the traditional structure is to fix the movable slider through the fixed force transmission pin embedded in the outer culvert, so as to ensure the connection with the internal force transmission mechanism (force transmission bracket or pull rod). And assembly requirements, the sealing effect of the gap between the force transmission mechanism and the outer culvert casing is very poor (when the airflow leakage is large, it is necessary to add a sealing structure on the outer wall of the outer culvert), and the micro-adjustment function of the radial position cannot be realized. In addition Due to the complex structure and large number of components, the requirements for machining accuracy and assembly are very high. Special tools are required for disassembly, and in many cases, the external system of the engine and all outer casings need to be disassembled. When replacing a single force transmission mechanism structure, even The entire engine needs to be disassembled. Assembly and disassembly are time-consuming, laborious and inefficient, and cannot meet the increasing assembly and maintenance requirements of the engine.

[0005] Therefore, it is necessary to iteratively optimize the force transmission mechanism of the traditional structure to solve the problem that the radial position of the traditional force transmission mechanism cannot be fine-tuned, the sealing of the connection between the force transmission mechanism and the external culvert casing is not good, and the assemblability and Technical issues with poor maintainability

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