Active rigidity-adjustable floating raft device

Abstract

The invention relates to an active rigidity-adjustable floating raft device. The active rigidity-adjustable floating raft device comprises a base and a floating raft frame for installing a platform used by equipment, wherein the floating raft frame is arranged on an upper platform of the base, two pairs of electromagnets are correspondingly arranged between the upper end face and the lower end face of the inner part of the floating raft frame and the upper surface and the lower surface of the upper platform of the base respectively, a pair of electromagnets are correspondingly arranged betweenthe two side faces of the inner part of the floating raft frame and the left end face and the right end face of the upper platform of the base respectively, and the electromagnets on the floating raft frame and the electromagnets on the upper platform of the base are electromagnets with different polarities; and position sensors are respectively arranged at the positions, close to the electromagnets, of the upper end face, the lower end face and the two side faces in the floating raft frame, and the electromagnets and the position sensors are respectively connected with an electromagnetic control box. According to the active rigidity-adjustable floating raft device, vibration energy transmission can be effectively attenuated, so that the aims of vibration reduction and noise reduction ofequipment are achieved.

Description

technical field [0001] The invention relates to a marine vibration isolation system, in particular to a floating raft device with adjustable stiffness. Background technique [0002] At present, the relatively mature vibration isolation technology mainly controls the vibration and noise level through the three methods of vibration source control, vibration control in the transmission process, and vibration reduction measures for the vibration-received objects. Conventional methods use elastic supports to reduce the impact of external excitation on the equipment. ability to respond. The rigid connection between the equipment vibration source and the installation is changed to an elastic connection, and the purpose of vibration reduction and noise reduction is achieved by attenuating the transmission of vibration energy. For example, the patent publication number: CN202674155U discloses a floating raft vibration isolation system for marine mechanical equipment. The middle floa...

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Problems solved by technology

[0005] (1) At present, the most advanced method is the air vibration isolation device, but the air vibration isolation device has relatively strict requirements on the material. Once the air vibration isolation device leaks, its vibration isolation effect will be greatly weakened, and there is a natural problem of poor reliability. defect

[0006] (2) There is still a certain physical connection between the main mainstream vibration isolation devices and the vibration source, and the vibration energy can still be transmitted through the connection medium to affect the vibration isolation effect

[0007] (3) At present, there is no active floating raft device with adjustable stiffness at home and abroad

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