Simple diagnostic methods provide transportation machinery gear vibration

Continuous engagement with teeth can transmit motion and power on the rim of the mechanical components . Gear is capable of engaging each other toothed machine parts , gears in

the transmission of the application appeared very early . Of the 19th century , the principle developed into gear cutting method and use of this principle of special machine

tools and gear cutting tool

Have appeared , along with the heat exchange manufacturers development of production, gears smooth functioning attention .
Simple gear vibration diagnostic methods
Simple diagnostic purpose is to quickly determine the gear is in normal working condition, in an abnormal working condition for further precision gear diagnostic analysis or

take other measures. air to water heat exchanger Of course, in many cases, the basis of a simple analysis of the vibration can also be diagnosed some

Apparent failures .
Simple diagnostic gear including noise diagnostics, vibration and shock pulse level diagnostic method (SPM) diagnostic method most commonly used is the vibration level

diagnostics .
Zhenping diagnostic method is the use of vibration to determine the strength of gear gear is in normal working condition of diagnostic methods . According to the determination

of different indicators and standards , determine the method can be divided into the absolute and relative value judgment method.
1 . The absolute determination method
The absolute determination method is the use of the gearbox parts amplitude values ??measured at the same measuring point directly evaluated as an indicator of operating status

. The absolute determination gear state identification method , must be based on a different gearbox , different requirements to develop appropriate criteria .

Based primarily on the development of the absolute criteria gear as follows: 1 ) A theoretical study of abnormal vibration phenomena ; ( 2 ) According to the analysis done by

the experimental vibration phenomena ; ( 3 ) to evaluate the measured data of the statistics ; ( 4 ) Reference domestic outside the relevant standards .

In fact , there is applied to the absolute value of all the gear determination standard, when the size of gear type, etc. , while its naturally different criteria . When a

parameter determined by the vibration of broadband judgment , the standard value must be changed depending on the frequency . Frequency

At 1kHz or less , according to the speed of vibration to determine ; frequencies above 1kHz , vibration judged by acceleration . The actual standard but also according to

specific circumstances .
2 -phase method of determining a time when
In practical applications , the criteria have not yet worked out the absolute value of the gear , you can take advantage of on-site measurement data for statistical average ,

relative to formulate appropriate criteria , using this standard determination method called relative value judgment . Relative criteria requirements

The same parts in the gear box at different times the amplitude of the measuring point measured by the amplitude compared to the normal state , and when the measured value is

compared with the normal value to a certain extent , a certain state is determined . For example , the relative value of the criteria specified actual value reaches 1.6 to 2

times the normal time to arouse

Note , it means danger , such as reaching 2.56 to 4 times. As used in accordance with the specific grading 1.6 times or 2 times in accordance with the grading depends on the

requirements of the gearbox may be higher rough devices ( e.g., mining machinery ) generally use multiple classification. Actual

In order to achieve the best results , you can also employ the two methods in order to compare contrast , a comprehensive evaluation .