SU1073579A1 - Gyrmotor resonance frequency determination method - Google Patents

Abstract

A METHOD FOR DETERMINING THE RESONANT FREQUENCY OF A GYRO MOTOR, which is to create forced oscillations of a variable frequency gyromotor, measuring the amplitudes of forced oscillations and finding the maximum amplitudes of forced oscillations, characterized in that, in order to determine the resonant frequencies dependent on the axial load on the gyro bearings, , after finding the maximum amplitudes of your oscillations, they heat the stature of the motor, and at the same time determine the presence of changes in the amplitudes of the forced oscillations by resonance x frequencies. .

Description

The invention relates to equipment, growth and can be primarily used to determine the resonant frequencies of gyromotors.

The known method for determining the resonant frequencies, which is contained in TCL4, that shock effects induce damped oscillations of parts, including parts of gyromotors, and the resonant frequency f is determined from the frequencies of these oscillations.

However, this method is applicable only to simple oscillatory systems and cannot be used with sufficient accuracy to determine the resonant frequencies of such a complex oscillatory system as a gyromotor,

The known method for determining the resonant frequency of the motor by changing the vibrations during acceleration and coasting 2.

This method has low accuracy, since it does not allow to determine what the disturbing force And at what frequency causes a gyromotor resonance.

The closest to the proposed technical essence and the effect achieved is a method for determining the resonant frequencies of a gyromotor, which consists in creating forced oscillations of a variable frequency gyromotor, measuring the amplitude of its forced oscillations and finding the maximum amplitude of forced oscillations of the Z.

The disadvantage of the known method is that it does not allow the selection of frequencies from the resonant frequencies, depending on the axial load on the motor bearings. The purpose of the invention is to determine the resonant frequencies depending on the axial load on the bearings of the gyromotor.

The goal is achieved by the fact that, according to the method for determining the resonant frequencies of the gyromotor, which consists in creating forced oscillations of a variable frequency gyromotor, measuring the amplitudes is forced. After finding the maximum amplitudes of the forced oscillations, the stator of the gyromotor is heated, and at the same time the "changes in the amplitudes of the forced oscillations at the resonant frequencies are determined.

FIG. 1 is a block diagram of an apparatus for implementing a method for determining the resonant frequencies of a gyromotor; in fig. 2 - amplitudes of the characteristics of the oscillation characteristics of the gyromotor with 2F-150 CT bearings in the axial direction.

The device contains a bracket 1 for mounting a gyromotor 2 mounted on the movable part 3 of the vibrating chamber 4 of the GMK-1 type with the vibration sensor 5. The generator of 6 sound vibrations of type ZG-10 and often- is connected to the input of the vibrostand 4.

. Tomer 7 type 43-33. A tube voltmeter 8 of type VZ-33 and a recorder 9 of type H-liO are connected to the output of the broadcaster 5.

The method is carried out as follows.

5 Using a generator of 6 sound vibrations, a variable frequency voltage is applied to the shaker 4, creating forced variable frequency oscillations. MOBILE part 3

0 with a gyromotor mounted on it. At the same time, the amplitudes of these oscillations are measured using a lamp voltmeter 8. At resonance, the oscillation amplitudes are maximal. Re5 probe frequencies are measured by a frequency meter 7. Then, an electric voltage is applied to the stator of the gyromotor (in two phases), which causes the stator to heat. When this happens

0 stator extension ,. causing a change in the pre-axial load on the gyromotor bearings, which in turn causes a change in the rigidity of the bearings.

5 If the resonant frequencies depend on the rigidity of the bearings, i.e. from the axial load on them, these frequencies will change when the stator is heated. As a result of the amplitude

0 oscillations, measuring e1 "1e lamp volt meter 8, the bukut decrease as the stator's HaipeBa. If the resonant frequency does not depend on the rigidity of the bearings, then these amplitudes do not change almost.

N, p and me. Studies of the gyromotor with submasters 2F-1 & 0 CT were carried out. The studies were carried out using the equipment shown in FIG. 1. With the help of a sakupisca 9 "yala, the amplitude-frequency characteristic gyroi) Topa (4 mg. 2) was obtained. Then, at each fixed resonant frequency, a voltage of 20 V was applied to the stator.

5,400 Hz for 1 min and watched by a lamp in a 8 meter for a change in the amplitude of oscillations. In the process of research, the frequencies I2250V 2710, to 3550 Hz, were allocated

0 KOTOiH iX clicked on the change ampli; , TUDA ...,:; .. . ,

As a base object. adopted prototype 3j.

To detect frequencies depending on the rigidity of the bearings, i.e.

from the axial load on them by the base method, it is necessary to hold at least three bulkheads of the gyromotor, installing a different axial load on the bearings. The proposed method allows to determine the composition of the resonant frequencies without bulkheads.

Claims (1)

METHOD FOR DETERMINING THE RESONANCE FREQUENCY OF THE GYROMOTOR, which involves creating forced oscillations of a variable frequency gyromotor * measuring the amplitudes of its forced oscillations and finding the maximum amplitudes of forced 'oscillations, characterized in that, in order to determine resonant frequencies depending on the axial load on the bearings of the gyromotor, after finding the maximum amplitudes of the forced oscillations heats the stator of the gyromotor and simultaneously determines the presence of changes in the amplitudes of the forced oscillations at the resonant parts otah.