Low-frequency large-load mechanical vibration exciter

Abstract

The present invention relates to a low-frequency large-load mechanical vibration exciter which comprises a driving motor, a gearbox and a synchronizing gearbox. An output end of the driving motor is connected to an input end of the gearbox through a second elastic pin gear coupling, and an output end of the gearbox is connected to an input end of the synchronizing gearbox through a first elastic pin gear coupling. The low-frequency large-load mechanical vibration exciter has the advantages of a simple structure and convenience in use, a low frequency and a large load can be achieved by increasing the number of fan-shaped eccentric blocks, a multi-speed gearbox is adopted by the gearbox, the reduction ratio can be converted, the low-frequency large-load mechanical vibration exciter is suitable for an excitation test under a large-load or small-load high-frequency condition, the driving motor is a variable frequency three-phase asynchronous motor, and the system operation requirements under large rotation speed range and low speed and large load conditions can be satisfied. The low-frequency large-load mechanical vibration exciter can be widely used for a low-frequency dynamic response test of a large structure such as a ship, a bridge and a foundation platform.

Description

technical field [0001] The invention relates to the field of large-scale structure frequency response excitation source equipment, in particular to a low-frequency large-load mechanical exciter. Background technique [0002] The mechanical vibration exciter is a centrifugal rotating mechanism. The two pairs of rotating shafts installed with eccentric wheels rotate in reverse to generate a vertical or horizontal centrifugal resultant force, which acts on the object to be tested through the base, so as to dynamically test the structure. Response test. In the prior art, the eccentric wheel on the rotating shaft of the vibration exciter is often pre-installed inside the box, and the eccentric distance cannot be effectively increased when the eccentric wheel is designed due to the space of the box, and it cannot meet the speed and excitation requirements required by the test. Therefore, it will become quite difficult to obtain the excitation test data of the exciter with similar...

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Problems solved by technology

In the prior art, the eccentric wheel on the rotating shaft of the vibration exciter is often pre-installed inside the box, and the eccentric distance cannot be effectively increased when the eccentric wheel is designed due to the space of the box, and it cannot meet the speed and excitation requirements required by the test. Therefore, it will become quite difficult to obtain the excitation test data of the exciter with a similar structure under low frequency and large load

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