CN2924162Y - Active vibration absorber - Google Patents

Abstract

The utility model discloses an active isolator which includes an equipment whose vibration is isolated; the upper and lower part of the equipment whose vibration is isolated are respectively provided with a vibration isolation mass and an installation foundation; rigid elements are arranged between the vibration isolation mass and the equipment whose vibration is isolated, and between the equipment whose vibration is isolated and the installation foundation. The utility model is characterized in that the rigid elements between the vibration isolation mass and the equipment whose vibration is isolated are provided with an electromagnet and a permanent magnet both of which are respectively fixed on the lower surface of the vibration isolation mass and the upper surface of the equipment whose vibration is isolated. The active vibration isolator has a good vibration isolation effect, and is suitable for the vibration isolation in cars, ships, aircrafts and all mechanical equipment.

Description

active shock absorber

(1) Technical field

The utility model relates to a vibration damping device. Specifically, it is an active electromagnetic suspension shock absorber, which is suitable for vibration reduction of automobiles, ships, aircraft and various mechanical equipment.

(2) Background technology

At present, on automobiles, ships, aircraft and other vehicles and various mechanical equipment, the vibration absorbers used are all pure mechanical products and have only passive vibration absorption function. However, during the driving or operation of various vehicles and mechanical equipment, it is inevitable that there will be large random load changes or operating conditions. It still has a good vibration absorption effect when the load or operating mechanism changes. Because the traditional vibration absorber is a purely mechanical product, it only has the function of passive vibration absorption. Once it is manufactured, its own parameters cannot be adjusted. When the random load of the vehicle increases or the operating conditions of mechanical equipment change, the vibration absorption effect is poor, especially the low-frequency vibration absorption effect is even worse.

(3) Contents of utility model

The problem to be solved by the utility model is to provide an active vibration absorber. This active vibration absorber has better vibration absorption effect.

In order to solve the above problems, the utility model adopts the following technical solutions:

The active vibration absorber of the present utility model includes a vibration-absorbing device, a vibration-absorbing mass block and an installation base are respectively arranged above and below the vibration-absorbing device, and there are stiffness elements between the vibration-absorbing mass block and the vibration-absorbing device, and between the vibration-absorbing device and the installation base. Its structural feature is that there are electromagnets and permanent magnets in the rigidity element between the vibration-absorbing mass block and the vibration-absorbing equipment, and the electromagnets and permanent magnets are respectively fixed on the lower surface of the vibration-absorbing mass block and the upper surface of the vibration-absorbing equipment.

Adopting the above scheme has the following advantages:

Since the active vibration absorber of the present utility model is provided with electromagnets and permanent magnets in the rigidity element between its vibration-absorbing mass block and the vibration-absorbed equipment, the electromagnets and permanent magnets are respectively fixed on the lower surface of the vibration-absorbing mass block and the vibration-absorbed device. on the top surface of the device. The electromagnetic levitation mechanism composed of electromagnet and permanent magnet is used as the active vibration absorbing unit. After its structure and main parameters are determined, the size, direction and frequency of its active control force are completely controlled by the size, direction and frequency of the current controlled by the electromagnet. Decide. When used in vehicles, the magnitude of the electromagnet control current can be adjusted according to the size of the random load to meet the requirements of the large random load on the vibration absorber, thereby greatly improving the vibration absorption effect, especially the low-frequency vibration absorption effect.

(4) Description of drawings

The accompanying drawing is a structural schematic diagram of the active vibration absorber of the present utility model.

(5) Specific implementation methods

As shown in the accompanying drawings, the active vibration absorber of the present utility model contains a vibration-absorbing mass 4, an electromagnet 5 and a permanent magnet 3, wherein the permanent magnet 3 and the electromagnet 5 have the same shape and are round blocks, and one side of the permanent magnet 3 is fixed on On the upper surface of the vibration-absorbing device 2, one side of the electromagnet 5 is fixed on the lower surface of the vibration-absorbing mass 4, and the two are arranged in parallel. Between the vibration-absorbing equipment 2 and the vibration-absorbing mass 4 , and between the vibration-absorbing equipment 2 and the installation base 1 , there are respectively provided a stiffness element 6 for vibration absorption and a stiffness element 6 for support. Said rigidity element 6 can adopt metal spring, also can adopt rubber spring. Wherein, the upper and lower ends of the stiffness element 6 for vibration absorption are respectively fixed on the lower surface of the vibration-absorbing mass 4 and the upper surface of the vibration-absorbed device 2 , with the electromagnet 5 and the permanent magnet 3 in between. The upper and lower ends of the supporting rigidity element 6 are respectively fixedly connected with the lower surface of the vibration-absorbing equipment 2 and the upper surface of the installation base 1 .

When working, as long as the electromagnet 5 is fed with current, and the size of the current is controlled as required, the active vibration absorption function can be realized.

Claims (4)

1. The active vibration absorber includes the vibration-absorbing equipment (2), the vibration-absorbing mass (4) and the installation base (1) are respectively arranged above and below the vibration-absorbing equipment (2), the vibration-absorbing mass (4) and the vibration-absorbing equipment ( 2), between the vibration-absorbing equipment (2) and the installation foundation (1), there are stiffness elements (6); the feature is that there are stiffness elements (6) between the vibration-absorbing mass (4) and the vibration-absorbing equipment (2) An electromagnet (5) and a permanent magnet (3), wherein the electromagnet (5) and the permanent magnet (3) are respectively fixed on the lower surface of the vibration-absorbing mass (4) and the upper surface of the vibration-absorbing device (2). 2. Active vibration absorber according to claim 1, characterized in that said stiffness element (6) is a metal spring. 3. The active vibration absorber according to claim 1, characterized in that said stiffness element (6) is a rubber spring. 4. The active vibration absorber according to claim 1, 2 or 3, characterized in that the electromagnet (5) and the permanent magnet (3) have the same shape and are block.

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