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Roots vacuum unit

Roots vacuum unit in use after a period of time, often can appear the crankshaft wear, the wear is uneven, the main journal and the connecting rod journal of radial wear mainly oval, crankshaft journal wear a cone-shaped mainly along the axial. So, how do these crankshaft wear cause?

2SK Roots vacuum unit.jpg

Reasons for the crankshaft wear of the roots vacuum unit:


1.because the oil way is tilted to connecting rod journal, when unit crank rotating centrifugal force, under the action of lubricating oil of mechanical impurities, partial product in the side of the connecting rod journal, speeding up the side of the journal of wear, make a cone-shaped connecting rod journal wear.


2. The bending of the connecting rod, the center line of the cylinder and the Central Line of the crankshaft are not perpendicular, which causes the shaft neck to be unevenly distributed along the axis, and the wear deviation is caused.


3. journal of elliptic wear, is due to the force acting on the shaft neck caused by uneven distribution of direction along the circumference, roots vacuum unit work, the comprehensive force of connecting rod journal suffered always acting on the inner side of the connecting rod journal, outward direction along the radius of the crankshaft, connecting rod shaft caused by internal jugular side wear.


The above is the reason why the crankshaft of the roots vacuum unit is worn out. We must pay more attention to it when we use it, and reduce the wear and tear as much as possible to increase the service life.

Roots vacuum unit.jpg


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