Air spring-magnetic suspension combined vibration isolator

Abstract

The invention discloses an air spring-magnetic suspension combined vibration isolator. The combined vibration isolator comprises air springs (17), a magnetic suspension vibration isolator body (18) and a connecting component (19). The magnetic suspension vibration isolator body (18) is arranged between inner bag bodies (7) of the air springs (17). The connecting component (19) comprises a thrust disc (4), a pressing plate (5) and balls (3) with a holder, wherein the balls (3) with the holder are arranged on the thrust disc (4) in the vertical direction. The thrust disc (4) and the pressing plate (5) are connected with a connecting rod (1) of the magnetic suspension vibration isolator body (18) and an upper cover plate (8) of the air springs (17). The air spring-magnetic suspension combined vibration isolator has the advantages of being wide in working band, high in reliability, compact in structure, high in bearing capacity, convenient to maintain and the like and has great application prospects in the field of marine power plant vibration isolation.

Description

technical field [0001] The present invention relates to an active-passive hybrid vibration isolator, specifically an active-passive hybrid vibration isolator that works in parallel with an air spring and a magnetic suspension vibration isolator, and is mainly used for marine power equipment or other heavy-duty equipment vibration isolation. Background technique [0002] The structural noise induced by the operation of the ship's main engine is one of the main noises of the ship, and its energy is transmitted through the support. The use of vibration isolation technology can effectively reduce the structural noise of the ship, which is especially important for ships, especially military ships. [0003] There are two types of vibration isolation: active vibration isolation and passive vibration isolation. Passive vibration isolation is to add passive components in the vibration transmission path to reduce the vibration intensity transmitted to the receiving structure. It has ...

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Problems solved by technology

[0004] Chinese patent CN102748425A discloses a device, which integrates a unilateral electromagnetic actuator in parallel with an air spring, and a heat sink is provided on the coil to realize heat dissipation, which can realize synchronous and effective control of broadband vibration and line spectrum vibration, However, the electromagnetic actuator is directly placed inside the air spring, which is inconvenient for maintenance, and the unilateral electromagnetic actuator is not conducive to the linearization of the output electromagnetic force and current, and the control accuracy is not high

Chinese patent CN101067433A designed an ultra-low frequency vibration isolation device in which a differential electromagnetic actuator and an air spring are arranged in parallel. Through the displacement control of the differential electromagnetic actuator, the system provides negative stiffness to reduce the natural frequency of the system and broaden the ultra-low frequency vibration isolation. range, but the integration is low and the overall size is large, which is not suitable for occasions with high space requirements, and the allowable lateral displacement of the differential magnetic levitation actuator is small. The actuator is easily damaged

Chinese patent CN101067432A discloses a device, which connects the magnetic levitation unit and the air spring in series, which effectively solves the problem that the air spring vibration isolation foundation cannot take into account the horizontal and vertical directions, but it is not good for the vibration isolation of the ship power plant when it is applied to the vibration isolation of precision instruments. Be applicable

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