The wear of 2BV vacuum pump can not be avoided after long-term use, but if it can be clear what causes the wear, it can be avoided as far as possible in use to reduce the wear.
The wear of the journal surface of 2BV vacuum pump is uneven. The radial wear of the main journal and the connecting rod journal is mainly elliptical, and the wear parts correspond to each other, that is, the wear part of each main journal is close to the side of the connecting rod journal, and the wear part of the connecting rod journal is also close to the side of the main journal. The crankshaft journal has conical wear along the axial direction. The elliptical wear of the journal is caused by the uneven distribution of the force acting on the journal in the circumferential direction
When the engine is working, the comprehensive force on the connecting rod journal always acts on the inner side of the connecting rod journal, and the direction is outward along the crankshaft radius, resulting in large wear on the inner side of the connecting rod journal, forming an ellipse. The reason for the tapered wear of the connecting rod journal is that the oil passage leading to the connecting rod journal is inclined. When the pump rotates, under the action of centrifugal force, the mechanical impurities in the lubricating oil accumulate on one side of the connecting rod journal, which accelerates the wear of the side journal and makes the wear of the connecting rod journal tapered.
In addition, the bending of the connecting rod, the non perpendicularity of the central line of the cylinder and the central line of the 2BV vacuum pump and other reasons will make the axial force on the journal uneven, and cause the wear deflection. The wear of the main journal is elliptical, mainly due to the influence of the centrifugal force of the connecting rod, the connecting rod journal and the crank arm, so that the relative wear between the side near the connecting rod journal and the bearing is greater. In addition, the journal surface may be scratched and burned. Scuffing is mainly caused by unclean engine oil, in which large hard mechanical impurities are scratched on the journal surface. The burn of the journal surface is caused by the burning of the bearing. The burning of the bearing is mainly caused by insufficient lubrication, too thin oil, blocked oil circuit and other reasons.
2BV vacuum pump should pay attention to these causes of wear when using. Although it can not completely avoid the wear problem, it can effectively reduce the wear and increase the service life of the equipment.
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