Vibration isolator with active vibration absorbing ability

Abstract

The invention discloses a vibration isolator with an active vibration absorbing ability. The vibration isolator with the active vibration absorbing ability is provided with a barrel-shaped upper shell, a rubber main spring is blocked in a top end opening of the upper shell, a main spring framework runs through the rubber main spring, a connecting stud is arranged at the top of the main spring framework, and the upper end of the connecting stud is used for connecting with a base body; the vibration isolator with the active vibration absorbing ability is provided with a lower shell connected with the upper shell, a shearing sleeve is fixed on the bottom plate of the lower shell, a column-shaped iron core is supported in the shearing sleeve through a magnetorheological elastomer arranged on the outer circumference of the column-shaped iron core, a magnet exciting coil winds the column-shaped iron core, and the magnetorheological elastomer works in a shearing mode; a magnetic conductive mass block is firmly connected with the iron core; a connecting bolt is arranged at the bottom of the lower shell for connecting with a main vibration object. The vibration isolator with the active vibration absorbing ability is capable of effectively lowering the vibration energy transmitted to the base body from a rotating mechanism, reducing the vibration of related parts of the rotating mechanism and improving the service life thereof.

Description

technical field [0001] The invention relates to a vibration isolation / absorption mechanism in a vibration system, more specifically a vibration isolation mechanism suitable for automobile engine mounting systems, new energy vehicle powertrain mounting systems, ship power systems, medical equipment systems, special equipment carriers, Vibration isolators with active vibration absorption capabilities for machine tool processing equipment and other rotating mechanical power systems. Background technique [0002] Rotating machinery is a very widely used power output component in engineering applications. During the use of rotating machinery, there are generally disturbance excitations that vary with their rotational speed. Taking the internal combustion engine as an example, when the internal combustion engine is working, the pitching moment generated by the cylinder pressure and the reciprocating inertial force is the main disturbance excitation of the internal combustion engin...

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Problems solved by technology

For the second solution, the resonance frequency of the suspension system can be changed by designing an active vibration absorber, so that the resonance frequency of the suspension system is far away from the excitation frequency of the rotating machinery, thus reducing the vibration caused by the rotating machinery system, but in In the field of active vibration absorbing technology, traditional active vibration absorbers can only be used alone as a vibration absorbing device, which requires additional space to install the active vibration absorber separately. However, the various components of general rotating machinery are very compact and the space is very limited. Therefore, it will waste a lot of space to install the traditional active vibration absorber on the rotating machine alone, and the traditional vibration absorber can only be used as a vibration absorbing device, and cannot be used to bear the load of the rotating machine. The application of active vibration absorbers in the vibration reduction of rotating machinery suspension systems is limited. At present, how to apply active vibration absorbers to the vibration reduction technology of rotating machinery suspension systems is to design a system that can not only bear rotating mechanical loads, but also absorb rotation Suspension components for mechanical vibration energy have not been reported

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