Nut placing and tightening device, method and system

Abstract

The invention relates to a nut placing and tightening device, method and system. The nut placing and tightening device comprises a connecting rod mechanism for transferring torque, a stretching mechanism and a gear mechanism for clamping a nut. The gear mechanism is hinged to one end of the connecting rod mechanism, the stretching mechanism is connected with the connecting rod mechanism and the gear mechanism, and the gear mechanism can be unfolded or folded relative to the connecting rod mechanism through the stretching mechanism. The connecting rod mechanism comprises a connecting rod which can be rigidly connected with or disconnected from the gear mechanism. In the state that the connecting rod is disconnected from the gear mechanism, the gear mechanism can be unfolded or folded relative to the connecting rod mechanism through the stretching mechanism. In the state that the gear mechanism is folded in place relative to the connecting rod mechanism, the connecting rod can be rigidly connected with the gear mechanism. Through the nut placing and tightening device, method and system, the nut can be tightened and dismounted in a narrow and long cavity in a steering mode; besides, length adjustment can be conducted according to needs, and thus the effective operation distance is extended.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a nut placing and tightening device, method and system applicable to the connection of high-pressure combined rotors of large-scale aero-engines. Background technique [0002] The core machine of a turbofan aero-engine consists of high-pressure compressor components, combustor components and high-pressure turbine components. Wherein, a high pressure compressor rotor (HPCR, High pressure compressor rotor) and a high pressure turbine rotor (HPTR, High pressure turbine rotor) form a high pressure combined rotor, and the two are connected by bolts. The assembly quality of the core machine is largely determined by the connection quality of the two high-pressure rotors. According to the conventional aero-engine assembly process method: first, use a special spreader and a crane to hoist the HPTR above the vertically fixed HPCR to complete the vertical docking. Then, in the vertical state o...

AI Technical Summary

Problems solved by technology

[0006] Because the mechanism of the tooling system is very complicated and contains a considerable number of gears and connecting rods, the structural size is large and the overall rigidity is low. The leverage amplification effect of the cantilever overall configuration makes the positioning accuracy of the terminal poor.

Due to the multi-stage transmission mechanism between the front-end manipulator and the terminal effector, the tooling system cannot realize effective multi-dimensional force sensing and force feedback, and is not sensitive to slight bumps and sticking, and it will cause skew and lock when the nut is installed. dead or loose

Therefore, the work efficiency is relatively low; in addition, the cost is high and the stability is poor

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