Tooling and Force Limiting Devices for Rotating Turbine Rotor Inner Cavity

Abstract

The purpose of the present invention is to provide a force limiting device, comprising: a support unit, including a mounting platform; a retractable unit, including a cylindrical bracket, and also includes a moving part, a first connecting rod and a fulcrum; and a force limiting swing head, including The torque output part and the input transmission part; at the first hinge position, the force-limiting swing head is hinged with the first connecting rod; at the second hinge position, the force-limiting swing head is hinged with the fulcrum of the supporting unit; and the force-limiting drive unit is set It is formed in the cylindrical bracket and can be docked with the input transmission part to drive the input transmission part to rotate; in the contracted state, the force-limiting swing head is located in the cylindrical space; in the swing-out state, the force-limiting swing head follows the axis of the moving part Move toward and swing around the second hinge position so as to swing out toward the outside of the cylindrical space. The invention also provides a tool for rotating the inner chamber of the turbomachinery rotor. The force limiting device can be used to strongly limit the assembly of complex space parts.

Description

technical field [0001] The invention relates to a force limiting device, in particular to a tooling for the inner cavity of a rotor of a rotary turbomachinery, which can be used for force limiting of fasteners in the inner cavity of the rotor. Background technique [0002] The rotor parts of rotary turbomachinery are generally connected by multi-stage bolts. These bolts are generally located in the inner cavity of the rotor. Because the entrance of the inner cavity of the rotor is small, the depth is large, the structure of the inner cavity is complex, and the operating radius of the bolts is much larger than the entrance of the inner cavity of the rotor. Therefore, the assembly of inner cavity bolt connection has always been a difficult problem in assembly. In the past, for rotors with relatively large inlets and relatively short depths, the inner cavity bolt connection can barely be capped manually, and then the "C" type special tooling is used to tighten and disassemble t...

AI Technical Summary

Problems solved by technology

Due to the limitation of the small entrance of the inner cavity and the requirement of multiple functions of the tooling, the diameter of the torsion bar is limited to be very small, and the torsion bar is prone to deformation when the torque is limited by a large force, so that the output torque accuracy is not high, and the reliability of the tooling is low; In the force limiting process, due to the torque attenuation on the transmission path (including the torsion bar and the gear set), the input torque is required to be very large, resulting in high labor intensity

In addition, because the force-limiting operation is a blind installation of the inner cavity of the rotor, in order to avoid collision between the tooling and the inner cavity of the rotor, extra care must be taken during assembly; in addition to the small entrance of the rotor, the single swing angle of the "C" type special tooling is very limited. The operator needs to align the nut several times to limit the force, and the nut assembly efficiency is very low

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