Vacuum Pump Spare Parts Failure

Vacuum Pump Accessories

  1.  Oil mist filter (alias: oil mist separator, exhaust filter) 

Under the action of driving force, the filter paper and cotton of the oil mist separator of the vacuum pump pass through the oil and gas mixture on one side. The oil is trapped, thereby realizing the separation operation process of gas and vacuum oil. The filtered vacuum pump oil is recycled with the oil return pipe, and the exhaust gas without oil is discharged to achieve the effect of pollution-free and clean.


  1.  Air filter

The sliding gap of the vacuum pump is very small, and the foreign medium contains particles and dirt, which will destroy the sliding surface, attach or block the sliding surface of the pump, and cause the pump to not work normally. To prevent foreign matter from being drawn into the pump, a filter is required to block it from entering the pump. If there are air impurities that are not filtered and cleared, and when they enter the pump, it may cause the oil pipe to be blocked and the lubricating oil to become mixed. Therefore, when choosing an air filter, it is necessary to choose the good quality product. 

Maintenance: The air filter of the vacuum pump should be cleaned regularly to prevent the impurity staying in the filter from being sucked into the pump and causing the pump to get stuck. 


  1.  Oil filter (alias: oil grid)

The oil filter is also known as the oil grid. The vacuum pump oil filter is installed on the pump oil return pipeline. The main purpose is to capture the pollutants that occur or invade the system in the oil return tank. Therefore, it is also an important filter device to control the pollution concentration of the system. 


Vacuum Pump Accessories Common Failure

  1. Wearing

Wearing is a common failure. One kind of wearing is the friction and wearing of contact surfaces between parts under lubricated conditions, which often occurs in gears, cylinders, vanes, rotor sliding bearings, and rolling bearings. This kind of wearing speed is slow, and the wearing failure is mainly related to lubrication and sealing conditions.

The other kind of wearing is the wearing caused by friction of parts against each other or the friction of materials on the surface of parts under non-lubricated conditions, which is especially prominent in vacuum pumps. Such as coupling, pulley of 2X series pump, twin screw of screw vacuum pump, etc. This type of wearing rate is much faster than the former, mainly related to the properties of metal materials and material properties.

For oil-type vacuum pumps, the wearing in lubrication is particularly prominent, mostly due to the deterioration of the vacuum pump oil and the poor lubrication caused by foreign impurities.


  1. Fatigue break

Fatigue break is a failure mechanism and crack generation is a failure mode. They often end up causing breakage of the parts. This fatigue fracture failure process generally exists in gear teeth subjected to alternating loads. Commonly found in connecting bolts, anchor bolts, springs and other parts, but also in important parts such as gear transmission shafts. There are many factors involved in fatigue fracture, and it is necessary to analyze the failed parts in detail to find out the reasons and take countermeasures.


  1. Deformation

Deformation is also a common failure mode for vacuum pump parts. Because the vacuum pump will generate a certain high temperature when it runs at high speed. Pump casing, plates, etc. are often in a heated state, they are the most likely to deform. The gradual plastic deformation can not restore the original geometric size and shape of the parts, and will cause vacuum pump failure in severe cases, such as sealing rings, oil seals, etc.


  1. Corrosion

Corrosion is another failure of vacuum pump parts. Commonly happened in vacuum pumps operating under complex PCB, chemical and other working conditions.


The above accessories are all consumable materials, if the above situation occurs, the accessories need to be replaced. When the vacuum pump fails, we need to investigate and deal with it, and make corresponding solutions to the above problems after confirming which accessories fails. In order to prolong the service life of the vacuum pump, it is necessary to maintain and repair the pump regularly to reduce the frequency of pump’s failures.


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