The dual hazards of excessive and insufficient lubrication in screw pumps and th

In the operation and maintenance of screw pumps, lubrication is the core element to ensure stable operation of the equipment. However, whether it is insufficient lubrication or excessive lubrication, it will pose a serious threat to the performance and service life of screw pumps, and operation and maintenance personnel need to attach great importance to it and take targeted measures.

Insufficient lubrication is a common problem during the operation of screw pumps. When the amount of lubricating oil is insufficient or the oil quality decreases, the friction pairs inside the equipment cannot form a lubricating protective film, and the metal parts come into direct contact, resulting in a sharp increase in frictional resistance. This dry friction state generates a large amount of heat, causing the temperature of key components such as bearings and rotors to soar. This not only leads to increased surface wear of the components, but may also cause thermal deformation and damage the fine fitting clearance between the parts. Long term exposure to insufficient lubrication can also affect the sealing performance of screw pumps, significantly increasing the risk of medium leakage. At the same time, equipment operation noise and vibration can significantly increase, and in severe cases, rotor jamming, motor overload shutdown, and other faults can even occur, directly interrupting the production process.

Compared to insufficient lubrication, the hazards of excessive lubrication are often overlooked. Many people believe that the more lubricating oil added, the better the lubrication effect, but this is not the case. Excessive lubricating oil will create additional resistance inside the equipment, especially in the bearing chamber and gear meshing area. Excessive lubricating oil will be violently stirred, generating a large amount of frictional heat and causing abnormal temperature rise of the equipment. At the same time, excessive lubricating oil will increase the pressure on the seals, accelerate their aging and failure, and cause leakage problems. In addition, excess lubricating oil may also enter the compression chamber or the conveying medium, contaminating the medium and affecting the conveying rate of the screw pump. It may even undergo oxidation and deterioration at high temperatures, producing impurities such as sludge, blocking the oil circuit and filters, and further exacerbating equipment wear and failure risks.

To address the issue of insufficient lubrication, it is necessary to establish a lubrication management system and regularly check the oil level and quality of the lubricating oil. The operation and maintenance personnel should select the appropriate grade of lubricating oil according to the requirements of the equipment manual, replenish or replace the lubricating oil on time, and keep the oil level within the normal range. For equipment that has been out of use for a long time, it is necessary to check the condition of the lubricating oil before starting and replace it if necessary to avoid equipment damage caused by the deterioration or lack of lubricating oil. At the same time, it is necessary to increase inspections of the lubrication system, promptly clear blocked oil circuits, repair leaking parts, and ensure that the lubricating oil can smoothly reach all lubrication points.

The key to dealing with excessive lubrication is to strictly control the amount of lubricating oil added. Operation and maintenance personnel should use refueling tools and refuel according to the oil level standards specified by the equipment, avoiding operating based on experience or intuition. After filling, it is necessary to confirm whether the oil level is normal through devices such as oil level gauges. If there is an excess, the excess lubricating oil should be promptly extracted. In addition, it is necessary to regularly clean the lubrication system, promptly discharge accumulated sludge and impurities, and maintain smooth oil flow. During the operation of the equipment, pay close attention to operating parameters such as temperature and noise. Once abnormalities are found, promptly investigate whether they are caused by excessive lubrication and take corresponding adjustment measures.

In short, the lubrication management of screw pumps requires accurate control, neither insufficient lubrication nor excessive lubrication. Only through proper maintenance methods and strict operating procedures can the harm caused by lubrication problems be avoided, the long-term stable operation of screw pumps be ensured, equipment maintenance costs be reduced, and production rates be improved.