SU896278A1 - Shaft vibration insulated support - Google Patents

Description

(54) VIBRATING SHAFT SUPPORT

one

The invention relates to active means of damping vibrations of objects, namely rotor mechanisms of power plants.

Known vibration control with automatic control, containing controlled exciter and control system 1.

The lack of vibration isolator is due to the fact that oscillation damping is performed only in one coordinate.

Closest to the proposed technical essence and the achieved result is a vibration-insulating shaft support containing an electromagnetic actuator, a vibration sensor mounted on the shaft and a control system including a pre-amplifier, a filter and a phase shifter 2.

A disadvantage of the known support is the low efficiency of vibro-splitting, due to the fact that the support requires two control channels on each of the coordinates, and, in addition, their interaction reduces the stability of the system.

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

This goal is achieved by the fact that the control system is equipped with three power amplifiers and two phase-shifting devices at 120 and 240 °, and the ICTBO actuator is designed as an annular magnetic circuit with three excitation systems, their windings are laid in the magnetic grooves at an angle of 120

10 to each other and connected to a corresponding power amplifier, one of which is connected to the control system, the other two are connected to it through phase shifters.

The drawing shows a diagram of vibro15 insulating shaft support.

The support contains an electromagnetic actuator, made in the form of an annular magnetic conductor 1 and three; excitation systems, the windings of which are laid in the grooves of the magnetic circuit at an angle of 120 to each other, the vibration sensor 2 mounted on the shaft 3, in series

25 connected to the sensor preamplifier-4, filter 5 and phase shifter 6, power amplifiers 7 and 9 connected to the excitation systems, one of which is connected to the phase shifter 6, and the other two are connected to

thirty

through the phase-shifting devices 120 and 240 to the devices 10 and 11. The excitation system contains six windings 12-17 magnetizations, alternately connected in series with each other and connected to a direct current source, and six excitation windings 1B -23 connected in pairs successively and connected with power amplifiers 7-9. The anchor 24 of the support is made in the form of a bearing insert with a magnetic core attached to it.

Bearing shaft works as follows.

A constant bias voltage is applied to the ends of the bias windings 12-17, and windings 18 and 21, 19 and 22, 20 and 23 are applied to the ends of windings 18 and 21, 19 and 22, shifted relative to each other by 120 °, respectively from amplifiers 9.6 and 7. The resultant electromagnetic interaction between the core and the windings of the excitation system will rotate at the frequency of the supply voltage. The signal from sensor 2 is amplified in preamplifier 4, passed through a high frequency filter, and fed to a phase rotator 6, which establishes such a voltage phase at which the force generated by the electromagnetic support will have the opposite direction to the unbalance force of the vibration component.

The use of anti-vibration support will reduce the load on the design of machines.

which will ultimately lead to an increase in the reliability of their work.

Claims (2)

1. USSR author's certificate No. 259568, cl. G 16 G 15/03, 1965.   2. Genkin M.D. and others. Increasing vibration isolation in a model of a resiliently suspended rotor using controlled compensators. Sb.Metody create machines in a low-noise version M., Science, 1978 (prototype).