Experimental device for simulating bolt-connected disk-and-drum rotor of aero-engine

Abstract

The invention discloses an experimental device for simulating a bolt-connected disk-and-drum rotor of an aero-engine, belonging to the technical field of rotor dynamics. The device comprises two bearing seats installed on a test bench base, a disk-and-drum rotor is installed between the two bearing seats, a direct-current motor is arranged on the outer side of the left-side bearing seat, and the direct-current motor is installed on the test bench base through a motor seat and is connected with the disk-and-drum rotor through an elastic coupling. The body of the device is the disk-and-drum rotor which is composed of four wheel disks, two drums and two rotating shafts. The middle large-diameter wheel disk is connected with the drums on the two sides through bolts and inner flanges, the drums on the two sides are respectively in lap joint with the outer edges of the wheel disks on the outer sides, the radial outer sides are compressed tightly by two semi-circular clamps and are fixed by radial screws, the outer sides of the two wheel disks are fixedly connected with two circular-section solid rotating shafts, and the right-end rotating shaft is equipped with one wheel disk. The experimental device can be used for studying the dynamic characteristics of the disk-and-drum rotor and the transmission of vibration load in the disk-and-drum rotor.

Description

technical field [0001] The invention belongs to the technical field of rotor dynamics, in particular to an experimental device for simulating a bolt-connected disk-drum rotor of an aeroengine. Background technique [0002] Due to the advantages of good bending rigidity of the drum rotor and good strength of the disc rotor, the disc-drum rotor structure is widely used in aero-engines. The disc-drum rotor consists of discs, drums and shafts, and the discs and drums at all levels are connected by bolts or welded together. Such as figure 1 The disc-drum rotor in the fan section of a certain type of aero-engine shown is composed of a first-stage disc 1, a first-stage drum 2, a second-stage disc 3, a second-stage drum 5, and a third-stage disc 6. The first-stage drum 2, The secondary drum 5 is a thin-walled short cylindrical shell structure, which connects the primary wheel 1, the secondary wheel 3, and the third wheel 6 to transmit torque; the primary wheel 1 and the primary dr...

AI Technical Summary

Problems solved by technology

The above two literatures focus on the influence of bolt connection on the dynamic characteristics of the rotor, without considering the structural characteristics of the thin-walled cylindrical shell of the drum, and the rotor test benches in the literature are all connected by external flanges, which is different from the actual disc-drum rotor. Inner flange connection

The above-mentioned structural differences lead to the fact that the experimental device cannot truly reflect the dynamic characteristics and stress distribution characteristics of the disc-drum rotor

At the same time, the existing experimental equipment cannot characterize the thin-walled cylindrical shell of the drum in the disc-drum rotor and the structural characteristics of the flange-bolt connection between the drum and the disc.

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