SU591780A1 - Device for measuring machine rotating component parameters - Google Patents

Description

The device relates to the control parameters and can be used to measure parameters (pressure deformation temperature, etc.,) of the elements of the machines when they rotate.

A device is known for measuring the parameters of rotating machines, in which the receiving of a high accuracy of information is carried out by a bending device, which makes it possible to eliminate the errors caused by variations of the transmission coefficient between the mobile and fixed blocks lj.

However, such a device kapibrovki very difficult.

Also known is a device containing a sensor of a measured parameter, a capibration device, a cyclic switch, a transducer amplifier, a sensor power generator, a power source of a hardware unit, varicaps, which together with inductance capacitance-inductive bridge form, in one pressure which is included through rotating capacitors amplified transformed

a unit with a secondary control and recording device, and the second diagonal of the bridge through inductively connected rotating and stationary coils is connected to the generator of the pump voltage of bridge 2j.

The known device operates at high speeds, vibrations and temperature fields. All this reduces the accuracy of intent even in the presence of a calibration device in the vrashih of a proper unit.

However, the fact that the calibration signals and the useful signal in it are separated due to the use of a cyclic switch results in additional errors.

The aim of the invention is to improve the measurement accuracy.

For this purpose, a low-frequency generator, the output of which is connected to the input, is inserted into the fixed .. device. convert pnewuz pa.

The drawing shows a diagram of the device. ... ,: . .

The device contains sensors 1 of the measured parameter, cyclical switch

2, varicaps 3 and 4, the active coupling coagent 5 of the I mobile and II fixed bpokov, 6 bearing resistance, rotating 7 and the fixed 8 windings of the transformer 9 -. voltage generator 5 low frequency; Strengthen the node 1O, high frequency generator 11, device 12 for recording and monitoring the measured parameters.

The device works as follows. Io Signal from sensors 1 through switch

2 is fed into the controlled diagonal of the capacitive-inductive bridge (varicaps 3 and 4 and half of the windings of the coil 7). The power supply of the bridge by the voltage of the carrier voltage is 51 from the generator 11 due to the inductive coupling of the fixed 8 and the rotating 7 windings of the transformer.

The control voltage from sensors 1 leads to a change in the magnitude of the varicaps 20

3 and 4 and unbalance the bridge. The unbalance voltage through the rotating capacitor 5 delivers-r to the input of the amplifier-converter unit Y. The voltage of the sensor 1 is recorded by the device 12. The voltage of the 25 frequency generator 9 is supplied to the parallel control voltage received from the sensors 1, thus , voltage calibration. The ratio between the voltage received from the generator 11 (30 frequency, level, duration, time),

and the voltage taken from the sensors is set to equivalent-measurable. parameters of the rotating part, which is a necessary prerequisite for obtaining reliable information.

The reliability of the resulting; 1 of the {1 mation is further enhanced by that procession. that the process of measurement and kapnbrovk can practically not be separated in time ..

Form

the invention

p a

A device for measuring parameters of rotating elements of a machine, consisting of a movable block mounted on a rotating part, comprising series-connected sensors, a switch, a varicap-inductive bridge, a fixed block containing a high-frequency generator, and a successively connected force-transformer node the registering device, a rotating transformer connecting the generator with a bridge, an arresting capacitor connecting the bridge to the amplifier-transducer unit, and and w ec Chez that, in order to increase the accuracy of the measurement, is entered in the fixed block low frequency generator, whose output is connected to the input of amplifying and transducing assembly.

Sources of information taken into account in the examination:

.one. US Patent No. 3797305, cl. 73-136 1974.

2. USSR author's certificate .№ 461320, cl .. Q 0 13/08, 1974.