A Passive Vibration Isolation Device Suitable for Low Frequency Vibration

Abstract

The invention aims to provide a passive vibration isolation device suitable for low frequency vibration. The passive vibration isolation device comprises a device shell and a vibration isolation platform. The device shell comprises a shell body and a shell side body. The shell side body is arranged on the side face of the shell body, a first magnet is installed in the shell side body, a first spring, a second spring and a second magnet are installed in the shell body, the positive pole of the first magnet and the positive pole of the second magnet are opposite, the negative pole of the first magnet and the negative pole of the second magnet are opposite, the upper end of the vibration isolation platform is located outside the shell body, the lower end of the vibration isolation platform is connected with the second magnet, the first spring is arranged between the second magnet and the inner wall of the upper end of the shell body, the vibration isolation platform is sleeved with the first spring, and the second spring is arranged between the second magnet and the inner wall of the lower end of the shell body. The requirements for high static rigidity and low dynamic rigidity can be met, and small static displacement and low frequency vibration isolation performance are guaranteed. Through the device, the influences of foundation vibration and impact on a precise instrument or a driver can be effectively reduced.

Description

technical field [0001] The invention relates to a vibration isolation device. Background technique [0002] With the continuous development of industrialization, people's requirements for vibration isolation are getting higher and higher. For example, low-frequency vibration isolation platforms for precision instruments, and helicopter pilot's seats need better vibration isolation performance at low frequencies. Traditional passive vibration isolation technologies such as single-layer vibration isolation, double-layer vibration isolation, and floating raft vibration isolation can effectively isolate the transmission of mechanical equipment vibration to the foundation and the transmission of foundation vibration to equipment, and have been used in ships, aerospace, automobiles, etc. It has been widely used in many fields. But like other vibration control technologies, passive vibration isolation technology also has its shortcomings that are difficult to overcome. For exampl...

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Problems solved by technology

Therefore, the traditional passive vibration isolation technology always has the problem of trade-off between dynamic stiffness and static deformation.

Although some new vibration isolators can meet the above requirements, they have complex structures and high costs.

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