Electromagnetic excitation shaft loading device

Abstract

The invention discloses an electromagnetic excitation shafting loading device. The electromagnetic excitation shafting loading device is composed of an axial loading device, a radial loading device, an armature, a current generating device and a load measuring device. The axial loading device and the radial loading device are respectively used for exerting the axial and radial loads on the shafting. The static and dynamic loads can be simultaneously loaded by using the electromagnet principle, and the static load also can be only loaded. The loaded load is controlled by the input current; the loaded dynamic load can be a single-frequency exciting force, and can be the combination of a plurality of exciting forces. The invention provides a new technical approach for simulating ship shafting vibration and ship stern vibration caused by the ship propeller exciting force and the ship structure noise caused by these vibrations, realizes the contact-free and friction-free purpose of the shafting; the loading of the precise single-frequency sine wave exciting force and the loading of the combined waveform exciting force are mainly used for the excitation experiment of the ship shafting experiment table or ship shafting berth, and can be further used for the excitation experiment underwater.

Description

Technical field: [0001] The patent of the present invention relates to a shafting loading device using electromagnetic principle, which is mainly used for loading experiments and excitation experiments of ship shafting test benches. Background technique: [0002] When conducting experiments related to ship shafting, the ship shafting test bench often needs to apply a certain load to the shafting to simulate the force of the propeller on the shaft; when conducting experiments related to shafting vibration, it is also necessary to apply dynamic loads, namely Exciting force. [0003] At present, the hydraulic loading device is generally used to load the static load on the shafting test bench. The shaft is a rotating part, but the hydraulic loading device does not rotate with the shaft, so there is contact and friction between the shaft and the hydraulic loading device. For example, the lateral force hydraulic loading device that simulates the influence of the propeller's own w...

AI Technical Summary

Problems solved by technology

[0004] The loading of the dynamic load uses a vibrating machine, and installing the vibrating machine on the rotating shaft will cause some problems, mainly: 1) the connection problem of the energy source of the vibrating machine and the control circuit; 2) the installation of the vibrating machine on the shaft will cause problems. Affects dynamic balance during shaft rotation, causing additional vibration

If the exciter does not rotate with the shaft, there will be contact and friction between the shaft and the exciter, which leads to the same problem as the aforementioned hydraulic loading device, which changes the actual force state and motion state of the shaft system

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