SU847065A1 - Device for touch-free inspection of machine shaft oscillation - Google Patents

Description

(54) DEVICE FOR NON-CONTACT VIBRATION COUNTING

one

This invention relates to a measurement technique and can be used in mechanical engineering.

A device for contactless monitoring of a shaft of a machine, comprising an inductive sensor, including a supply and measuring windings wound on cores, a generator, detectors, and a recorder, the generator output is connected to the sensor supply windings, the outputs of which are connected to the detectors and the recorder 1.

A disadvantage of the known device is the design complexity and low measurement accuracy due to the impossibility of eliminating destabilizing factors.

The circuit of the invention is to simplify the design and increase the nausea of the measurements.

This goal is achieved due to the fact that the device is equipped with a dividing unit connected in series between the detectors and the recorder, the sensor cores are made of П-obra1p.1mi, the protrusions of one of which are shorter than the protrusions of the other, and have windings in hell, and the measuring windings,

SHAFT MACHINE

wound on different cores are connected in series-counter and form one output, one of them is the second output, and the supply windings are connected in a single way, therefore.

The drawing shows a block diagram of a device for contactless monitoring of machine shaft oscillations.

The device contains an inductive sensor, including wound on the cores 1 and

10 2 supply 3 and 4 and measuring 5 and 6 windings, generator 7, detectors 8 and 9 and recorder 10.1 The output of the genator 7 is connected to the supply windings 3 and 4 of the sensor, the output of which is connected to detectors 8 and 9 and

15 to the registrar 10. A dividing block 11 is connected between detectors 8 and 9 and the registrar 10. The cores 1 and 2 of the sensor are U-shaped. the protrusions of the core 2 are shorter than the protrusions of the core 1. Two measuring

Claims (1)

26, windings 5 and 6, which are wound on different cores, are connected in series to each other, and the supply windings 3 and 4 in series. The device works as follows. The voltage in the measuring windings 5 6 of the sensor is inversely proportional to the distance from the projections of the cores 1 and 2 to the monitored surface of the shaft. Since windings 5 and 6 are the same, the following voltages will be induced in them. and, Uiу - voltage on the winding 5 wound on the core 1 with long protrusions; - voltage on winding 6 wound on core 2 with short protrusions; -the difference in the heights of the protrusions of the cores 1 and 2 is known; - conversion factor; - the distance of the core 1 to the concentrated surface of the machine shaft. From expressions 1 and 2, we get слs and, –and. does not depend on various destabilizing factors. The supply windings 3 and 4 are connected to the output of the generator 7, and the output voltage of the measuring windings 5 and b, due to their series-opposite switching, is the voltage difference U, - U ,, and on the other hand, the voltages are removed U) | These signals are detected by the corresponding 54 detectors 8 and 9 and go to block 11, where the ratio | which, when taking into account the multiplier if, which is known with great accuracy, makes it possible to measure the oscillations of the shaft of toolbox 1. From the output of dividing unit 11, the signal enters the recorder 10. The main advantages of the invention are a simplified design and an increase in measurement accuracy. The invention of the device for contactless control of oscillations of the shaft of the machine, containing an inductive sensor, including a supply and measuring windings wound on cores, a generator, detectors and a recorder, the generator output is connected to the supply windings of the sensor, the outputs of which are connected to the detectors and the recorder, In order to simplify the construction and to ensure accuracy, it is equipped with a dividing unit connected in series between the detectors and the recorder, the sensor cores are filled with U-processing They have two windings, two measuring windings wound on different cores, are connected in series-opposite and form one output, one of which is the second output, and the supply windings are connected in series. Sources of information taken into account in the examination of L Vibration technology. Collection. M., 1964,. 50-55 (prototype).