SU920434A1 - Stabilizing ball-bearing support of shaft - Google Patents

Description

(5) STABILIZING BALL BEARING OP (

Shafts

The invention relates to the under-oil industry and can be advantageously used to stabilize ball bearing bearings. Ball bearing bearings are known, which contain a drive shaft mounted in a ball bearing housing, piezoceramic vibrators installed between non-rotating ball bearing rings and a housing, a vibrator power supply unit 1 However, the support is known to have the disadvantage that it has a low 10 effective damping of the shaft radial oscillations. The purpose of the invention is to increase the efficiency of damping the radial oscillations of the shaft. The goal is achieved teM that the support, containing a drive shaft mounted in a housing on ball bearings, piezoceramic vibrators, mounted between a non-rotating ball ring of 41 ball bearings and a housing, a vibrator power supply unit, includes a series-connected radial oscillation sensor located in the middle of the shaft, a converter and a regulator frequency ratio, the output of which is connected to the input of the power supply. Piezoceramic vibrators are made two-coordinate in radial and axial directions. The drawing shows the shaft support. The support comprises a drive shaft 3 mounted in a housing 1 on ball bearings 2, a piezoceramic vibrators k mounted between non-rotating rings of the ball bearings 2 and a housing 1, a power supply unit 5. The support contains serially connected sensor of radial oscillations of the shaft, located in the middle part of the shaft, converter 7 and frequency ratio controller 8, the output of which is connected to the input

Power supply unit 5, Piezoceramic vibrators are made two-dimensional in radial and axial directions.

The support works as follows. When the drive shaft 3 rotates, its radial vibration due to the vibration of the ball bearings 2, which is sensed by the sensor 6, is converted by the converter 7, and the received signal is fed to the frequency ratio controller 8.

Depending on the magnitude of the radial oscillations of the midpoint between the ball bearings 2 of the shaft 3, the frequency ratio controller 8 generates a corresponding signal, which is fed to the power supply .5 and provides a change in the ratio of the frequencies of the electric signals supplied to the piezoceramic vibrators. The direction of change in the frequencies of these signals is conducted in the direction that ensures such a change in the rolling friction forces in bearings 2 so that the movement of their separators becomes synchronous and antiphase. Consequently, with this selection of the frequency ratio, both ends of the shaft 3, which are located in ball bearings 2, make anti-phaenic synchronous oscillations, and the midpoint of this shaft, which has a radial oscillation sensor, does not radially move,

The shaft support allows damping its radial oscillations at the desired magnitude of their amplitude. In this case, a certain regulation of the location of the non-oscillating shaft point along its length is possible.

Claims (2)

1. Stabilizing ball bearing shaft support, containing a drive shaft mounted in a housing on ball bearings, piezoceramic vibrators mounted between non-rotating ball bearing rings and a housing, a vibrator feeder unit, so as to increase the efficiency of damping radial shaft oscillations, it is equipped with a series-connected sensor of radial oscillations of the shaft, located in the middle of the shaft, with a converter and a frequency ratio controller, the output of which is soy Inonii to the input power supply. 2. The support according to claim 1, that is to say that the piezoceramic vibrators are made two-axis / in the radial and axial directions. Sources of information taken into account in the examination 1. USSR author's certificate No. 186182, cl. G 01 M 33/20, 1966 (prototype).