SU813168A1 - Method of measuring shaft support bearing wear in gear train mechanisms - Google Patents

Description

The invention relates to the field of the bearing industry, namely to diagnose wear of bearing bearings.

A known method for determining the wear of bearing bearings according to the parameters of vibroimpulse signals [1}

However, this method has a low accuracy in determining the service life of the supports.

The chain of the invention is to increase the reliability of diagnosing bearing wear ί {NICK bearings.

Delivered Nel is achieved by measuring adjacent intervals between vibration pulses, determining their ratio, comparing the obtained ratio with a reference one and judging by the difference obtained the value of the wear of the bearing bearings.

The drawing shows an oscillogram of the vibration signals obtained during operation of the _m gear. ,

The drawing indicates: Ί \ and Τχ, respectively, the duration of single-pair and two-pair gearing, - step 2

I.

zeppenia, £ - overlap coefficient, 0,1,2,3 - numbers of teeth in meshing.

When the teeth enter the meshing of a pair of teeth due to the difference in the main steps of the driving and driven wheels, it experiences a middle or edge impact (depending ™ on the ratio of the basic steps of the driven and driving wheels). Regardless of the type of impact, the moment of its onset indicates the beginning of a two-pair gear engagement (point a). Then there is a phase of double-pair engagement, in which the load is distributed between two pairs of teeth. At the moment the previous pair of teeth disengages, the entire load is redistributed to the next pair (point c). Impulse application of the load causes a shock at zero speed. The time between points a and b reflects the duration of the two-pair engagement. After the point in, one pair of teeth is engaged, i.e. single-pair engagement takes place. At the moment of entering the meshing of the next pair of teeth (point c), two-pair meshing begins again. Next, the cycle repeats. With the increase in wear of the bearing bearings, an increase in the axial distance and the gear engagement angle occurs. By virtue of this, the duration of the bi-diar mesh decreases and the duration of a single-pair increases; and also changes the ratio of one interval. time to another. The average condition of adjacent intervals by comparison with the reference determine the technical condition of the bearing bearings of the transmission. The high-speed mode of operation of the mechanism does not affect the ratio of time intervals, since the latter change in proportion to the high-speed mode.

A method for determining the wear of bearing bearings of shafts of mechanisms with gears can be implemented, for example: 'measures, as follows.

Vibration transducer is installed on the gearbox housing. The signal from the vibration transducer is passed through 25 differences and the wear value of the subband filter of the frequency of the installation resonance of the vibration transducer in the ultrasonic range with characteristics optimized according to the parameters of impact interaction of the teeth is judged. The signal from the filter is fed to the input of the oscilloscope. With 'No. 525.867. class <501 M 13/04, 1976.

813168 4 in this case, the start of the oscilloscope sweep is carried out so that the time interval of one or more reconnection of pairs of teeth of the driven driven gear is provided.

On the obtained waveform measure the adjacent time intervals T _and and T ₂ and-find the ratio. The magnitude of the calculated ratio is judged on the wear of bearings and bearing seats.

Claims (1)

The invention relates to the field of the hip industry, namely, the bearing wear has been diagnosed. The method is known for determining bearing wear by the parameters of vibration signals f 1} However, this method has a low accuracy of determining the service life of the supports. The chain of the invention is the pyszhyshenie reliability of diagnosing wear bearing {nicov supports. This goal is achieved by measuring the adjacent intervals between vibratory pulses and. their ratio is determined, the ratio obtained is compared with the reference one, and judging by the difference obtained, the bearing bearing wear values are judged. The drawing shows an oscillogram of the vibrosignals received during the operation of a gear transmission. In the drawing it is indicated: T and T / corresponding to the hegenic duration of one-pair and two-pair gearing, - step for depeni, - overlap factor, 0,1,2,3 - numbers of teeth, ha; J shchiks with engagement. When the teeth enter into engagement, a pair of teeth, due to the difference in the main steps of the driving and driven wheels, experience a midpoint or edge kick (S, depending on the ratio of the axial pitch of the driven and driving wheel). Regardless of the type of impact, the moment of its occurrence indicates the beginning of a two-pair gearing engagement (point a J. Next, a two-pair engagement phase is observed, in which the load is distributed between two pairs of teeth. Point B). Impulse application of a load causes a blow with zero speed. The time between points a and b reflects the duration of the two-pair engagement. After the point in the engagement there is one pair of teeth, t. There is a one-pair engagement. At the moment of 58l, in the interception of the posvzdukpaia paruvavav (point c), it starts again zatishes1 8. Then aikp n Taras p. 3 c1shu et hoo decreases the time of engagement and increases the duration of the shopper pair and also changes the ratio of one to the steep. transfer. By the mode of operation of the mechanism of the OTiid mechanism, the shevie of the time intervals is affected, since the latter change | yuporiovalvo speed mode. Method for determining wear of ancillary ops | vapse mehanizsh with zubchatyats ne | Evachami can be realizyush, for example, speduyushgai way. Vibro-reversal is mounted on the gearbox housing. The signal from the B110 {transducer of the gate passes the filter of the frequency of the voltage transducer in the ultrasonic range with characteristics optimized for the parameters of the tweeter. The signal e of the filter is fed to the input of the oscilloscope. The T atom launching the oscilloscope sweep is performed in such a way that the time interval of one or several shots of lead pairs (and lead | | oh gears) is indicated on several oscillations and the time intervals T and T are found and measured. Comparison of wear of bearing and seat bearing housings. Formula of the invention. Method of preventing and wear of bearing shafts of a mechanism with a gear rtepessataMB about vibrating pulleys with a rotator (differing fGMt) In order to determine the accuracy of wear and tear of bearings, OROp izioreyopvt adjacent time intervals Wfinay 1 time, we will determine the difference between | | during examination 1. USSR certificate I 525.867. Cand. and O1 M 13/04, 19Y6.