SU1218206A1 - Vibroinsulating system - Google Patents

Description

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The invention relates to the protection against the vibrations of various objects.

The purpose of the invention is to increase the efficiency of vibration isolation.

The drawing shows a diagram of the vibration-isolating system.

An anti-vibration system with;:, a vibration isolator 1, comprising a housing 3 installed on the base 2, two electromagnets 4 and 5 with windings 6 and 7 that interact with an electromagnet movable element 8 with a rod 9 fixed on the object 10, and an elastic element 11 mounted between the movable element 8 and the wall of the housing 3, and a power and control device 12 connected to the windings 6 and 7 and made in the form of a periodic signal generator with varying amplitude and frequency selected 5-50 times smaller than the minimumnatural frequency of the vibration-isolating system, or the generator of the case- (Signal signal.

The vibration insulation system contains as far as vibration insulation 1 connected to the device 12 of the power and control.

The anti-vibration system works as follows

The stiffness of vibration isolators 1 when the device 12 is turned off is sufficiently small so that an increased bi-isolating effect is provided in the resonance region of the vibration-isolating system 1, where the most intensive components of vibrations are located in most of the thickening zones. However, due to the presence of low frequency

Compiled by A. Andreev Editor L, Avramenko Tehred J.Kastelevch Corrector L.Pilipenko

Order 1120/47 Circulation 880 Subscription VNIIPI USSR State Committee

Inventions and discoveries 113035, Moscow, 1-35, Raushsk nab ,, d, 4/5

Branch PIP Patent, Uzhgorod, Proektna St., 4

218206

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Perturbation components coming from the base 2 side to the object 10, in the vibration-insulating system, resonant oscillations can occur, the magnitude of which depends on the ratio of the natural frequencies of the vibration-isolating system and the frequency of disturbance and the damping value in the vibration insulators 1.

To reduce the magnitude of the resonant oscillations, the rigidity of the vibration isolators is periodically changed around the average value determined by the required degree of vibration isolation. The change in stiffness is carried out using a device 12 that amplifies a periodic electric signal applied to the windings 6 and 7 of electromagnets 4 and 5. A periodic change in stiffness leads to a periodic change in the natural frequencies of the vibration-isolating system, which leads to a periodic detuning of the vibration-isolating system from component disturbance with the resonant frequency and reduce the oscillations of the object 10,

With real values of the quality of the resonance of the vibration-insulating system, the requirement to limit the resonant oscillations at 10% of the maximum values is provided by selecting the frequency of the periodic signal 5-50 times lower than the minimum of the natural frequencies of the vibration-isolating system.

A similar effect of reducing the oscillations of the object 10 gives the supply by means of the device 12 to the windings 6 and 7 of the electromagnets 4 and 5 of the electric signal5 whose amplitude and frequency are random.

Claims (1)

A VIBRATION ISOLATING SYSTEM, comprising a vibration isolator, including a housing mounted on the base, two electromagnets placed therein, a movable element interacting with them with a rod fixed to the object, and an elastic element installed between the movable element and the housing wall, and a power device and regulation, connected to the windings of the electromagnets, characterized in that, in order to increase the efficiency of vibration isolation, the power regulation device is made in the form of a periodic signal generator with changes yuscheysya amplitude and frequency selected in 5-50 times less than the minimum natural frequency vibration isolation system or the random signal generator. 00 th of se>