Active and passive integrated vibration isolator system

Abstract

The invention discloses an active and passive integrated vibration isolator system which comprises a signal collecting device, a control device and a vibration damper. The signal collecting device collects vibrating signals of mechanical equipment and transfers the signals to the control device, the control device controls the vibration damper to conduct vibration attenuation according the signalsby means of an FxLMS algorithm, and the vibration damper comprises a shell, the passive vibration isolator arranged in the shell and fixedly arranged relative to the shell and an electromagnetic actuator, wherein the passive vibration isolator is connected with the electromagnetic actuator in series through a decoupling film, the decoupling film of the electromagnetic actuator and an active vibration damper are connected through a shaft sleeve, the shaft sleeve is fixed to the active vibration damper, and the passive vibration damper is fixed to the shaft sleeve. The passive vibration damperis formed by a rubber main spring, upper and lower liquid chambers, an inertia channel and the decoupling film, and the projected area of the decoupling film is smaller than that of the area of the main spring by 1 / 2.

Description

technical field [0001] The invention relates to a vibration isolator system, in particular to an active and passive integrated vibration isolator system. Background technique [0002] In the modern industry and transportation industry, the vibration of mechanical equipment often has an adverse effect on the accuracy, stability, safety, comfort, and service life of the entire system. For example, in the automotive field, the transmission of the engine to the frame is reduced. The vibration of the vehicle can effectively improve the comfort of the car and the reliability of the mechanical system; in the field of military ships, isolating the vibration of small and medium-sized equipment (such as compressors) can improve the concealment of military ships and reduce the detected Possibility; In the aerospace field, isolating the impact of adverse working conditions such as severe vibration on precision instruments can improve the reliability of system operation, and so on. With...

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Problems solved by technology

[0004] The Chinese patent application No. 201610534518.2 filed on July 7, 2016 proposes a driven plate with an inertial channel and an upper and lower liquid chamber connected to the actuator proposed in an active control hydraulic mount for the powertrain of an automobile. structure, under high-frequency working conditions, the structure of the active control hydraulic mount of the automobile powertrain cannot offset the vibration, and the reduction of the active force will lead to the need to increase the operating force to meet the demand for offsetting the exciting force. Only the magnetostrictive actuator whose longitudinal dimension is too long can meet its function, which makes the whole device too large to meet the actual installation requirements and reduce the working efficiency of the whole system

The structure has the following problems: 1. The upper liquid chamber is formed by vulcanization of the top membrane and the rubber main spring. Such a setting makes the upper liquid chamber compressed by the main spring when the main spring compresses the lower liquid chamber, and the pressure difference between the upper and lower liquid chambers becomes smaller. Resulting in less flow through the inertial channel, reducing the ability of the inertial channel to dissipate vibrational energy

2. The effective area of ​​the structural decoupling membrane acting on the lower liquid chamber is equal to the effective area of ​​the main spring acting on the lower liquid chamber, so that the vibration force of the actuator directly offsets the exciting force, and the output force of the actuator is required to increase. Bring about increased system energy consumption, increased volume, and reduced efficiency

When the suspension is subjected to static load, the pressure of the upper and lower liquid chambers is relatively high, and this structure cannot meet the sealing requirements under complex working conditions when the vehicle is running

This design will cause serious micro-leakage in the liquid chamber during the working process, which will affect the reliability of the product

2. The effective area of ​​the decoupling membrane acting on the upper and lower liquid chambers is almost the same as the effective area of ​​the main spring acting on the upper liquid chamber. This setting method will lead to a decrease in vibration isolation efficiency

[0007] The above-mentioned design schemes have defects in sealing, vibration isolation effect, and volume efficiency, which limit their practical application. Therefore, it is of great significance to develop an active-passive hybrid vibration isolation device with high efficiency and small volume.

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