Low-dynamic-stiffness longitudinal loaded excitation device for rotor shaft system

Abstract

The invention provides a longitudinal loading device with low dynamic stiffness characteristic for a rotor shaft system. The device comprises a servo rotation module, a loading disc, a main spring, an auxiliary spring, a loading screw rod, an electromagnetic suction module, an excitation rod, an electromagnetic vibration exciter and a fixing support, wherein one end of the loading screw rod is fixed on a front panel of the fixing support, and the other end of the loading screw rod runs through the loading disc; the main spring is arranged on the loading screw rod between the fixing support and the loading disc in a sleeving manner; the auxiliary spring is arranged at the tail end of the loading screw rod in a sleeving manner, and is matched with a bolt to compress the loading screw rod and the loading disc; the servo rotation module is arranged at the front end of the loading disc, and is connected with the rotor shaft system; the electromagnetic suction module is arranged on the front panel of the fixing support, and the electromagnetic exciter is rigidly fixed or flexibly suspended on the fixing support; the excitation rod runs through an opening in the front panel of the fixing support and an intermediate hole of the electromagnetic suction module to be fixed at the center of the rear end face of the loading disc. The device can avoid the influence on the longitudinal coherent characteristics of the rotor shaft system caused by a longitudinal loading device.

Description

technical field [0001] The invention belongs to the technical field of vibration and noise control and test of a rotating shaft system, and in particular relates to a low dynamic stiffness longitudinally loaded vibration excitation device for a rotating shaft system. Background technique [0002] Ship propulsion shafting is a key component of the ship propulsion system, generally composed of main shaft, radial support bearing, thrust bearing, coupling and other components, responsible for transmitting the torque of the power equipment to the propeller and at the same time transmitting the thrust generated by the rotation of the propeller An important task for the hull. The vibration of propulsion shafting will not only cause noise, but also affect the reliability of shafting and related components. Therefore, the strength and vibration of propulsion shafting has always been an important content of ship design, and has been paid attention to by engineers and scientific resea...

AI Technical Summary

Problems solved by technology

This is equivalent to introducing an additional stiffness to the entire rotating shafting system, which will directly change the longitudinal inherent characteristics of the entire propulsion shafting system, resulting in deviations in the longitudinal mode and vibration and noise laws of the rotating shafting system obtained from the test, affecting the test results and verification results

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