How to make the bearing life longer?

Source: China Bearing Network Time: 2014-08-21

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In theory, the service life of the rolling bearing in a centrifugal pump is 20,000 to 80,000 hours; however, the theoretical life depends on many factors. Premature bearing failure will lead to high-value equipment strikes; sometimes even more serious results will be incurred. The bearing professor at NKE (Austria) offers some simple but useful tips for optimizing the bearing function. Satisfactory bearing life is based on the correct bearing selection. From the beginning; the bearing painter has chosen for different applications. The correct bearing to extend the bearing life and equipment function. This process requires many factors; such as load, hardness, bearing life guess, operating environment, etc.
Proper storage Guidelines; all bearings should be kept in their original packaging before the equipment. They need to be kept in a hygienic, moisture-free, relatively constant temperature environment. Rolling bearings should be kept away from dust, water and corrosive Chemicals. Swinging and sensation can permanently damage the mechanical function of the bearing; thus it is necessary to prevent sensation during handling and storage. Basically; all bearings must be stored horizontally; because some of the heavier bearings are placed vertically after being placed vertically Can be deformed by its own weight. Pre-coated grease (or sealed) bearings require unique care; because the grease will change after a long time of storage, so that when the bearing is used for the first time; there will be a certain degree The conversion noise. Therefore; the placement of such bearings should be controlled according to the first-in, first-out criteria.
Hygiene Hygiene is important for rolling bearings. The surface roughness of the bearing ring transition surface and the tumble element is generally 1/10 Î¼m; such a smooth appearance is very sensitive to the damage caused by contaminants. The smooth layer between the transition surfaces is generally It is 0. 2~1 Î¼m; the particulate impurities larger than the particle size of the smoothing agent will be over-rolled by the rolling element and partial pressure will occur in the bearing steel; eventually it will lead to permanent data fatigue. In addition to this; the external environment The size of the dust particles can reach 10 Î¼m; it will also damage the bearing. Therefore, the dust-free environment is essential for the storage and equipment of the bearing.
All preparatory equipment Bearings should be carefully equipped with equipment and disassembled. Professional professors estimate; 16% of premature bearing failures are due to incorrect equipment. For many equipment (for example, in production equipment) In terms of; generally, it is necessary to strictly control the equipment; it is also possible to select suitable bearing equipment. However, in the protection or exchange work; the environment is diverse. Therefore; to ensure the longest bearing life; The preparatory work is necessary for the bearing equipment.
First of all; relevant documents; such as drawings, protection manuals, product specifications, etc. have been carefully studied. Next; all bearing components; such as shafts, spacers, covers, gaskets, etc. need to adhere to a certain degree of cleanliness; from pollution. Nearby parts The situation should also be carefully examined.
Careful equipment and dismantling According to different applications and bearing scales and types; choose the appropriate equipment method (mechanical or hydraulic) and things. Here are some basic guidelines for bearing equipment:
1. Do not apply device forces on the roll elements; this simply causes partial overload of the roll elements and the touch surface of the race; it then causes premature failure of the bearings.
2. Do not use any hard things (such as hammers, screwdrivers, etc.) to directly knock on the bearing's exterior; this will cause cracking or chipping of the bearing ring.
3. Adhere to the guidance of equipment suppliers who are heavily stressed.
About 90% of the rolling bearings have never been removed from the equipment at their location; generally only large bearings will be removed due to the pre-protected preventive protection procedure. The same bearing as the equipment; the bearing must be carefully opened. Prepare; disassemble the process; ensure that adjacent components such as shafts and bushings are not damaged. Choose the appropriate method and thing according to the type, scale and application of the bearing. The painter should pay attention to it; Greatly simplify the equipment and disassembly of the bearing; thus reducing the cost of protection.
Correct and Proper Smoothing Smoothing agents can block the appearance of metal bearings (such as roll elements, bearing rings and bearing covers); thus reducing conflicts, metal-protecting parts and preventing contamination and impurities. There are a wide variety of smoothing agents (including Grease, oil and solids can be used for different operating conditions. The correct choice of smoothing agent is very important for the service life of extended bearings and equipment.
Because of the excessive tumbling of the tumbling parts; the bearing smoothing agent is subjected to long-lasting mechanical stress; otherwise; the moment is long, especially in high temperature, wet or contaminated environments; the chemical properties of the smoothing agent are subject to change. Inducing a gradual reduction in smooth quality. Thus; to ensure the longest service life; to smooth the bearings at regular intervals. Smooth cycle depends on operating conditions; such as temperature, speed, environment, etc. as long as in pre-smooth or sealed bearings ( Also known as "lifetime smooth" bearings); bearing life is dependent on the life of the smoothing agent.
It is necessary for the smoothing agent to ensure the tube in accordance with the manufacturer's instructions; the unique focus is on keeping the smoothing agent clean; free from contamination. Before each application; carefully check the quality of the smoothing agent; use a stale or stained smoothing agent Will cause the bearing to fail prematurely.
Condition monitoring/protection Generally speaking; rolling bearings are very reliable; although they have a limited lifespan, they are identical to all other important parts of the machine; they should be timed and protected. The frequency of viewing and protection depends on The importance of a single application and the operating conditions of each device.
Because the effect of the bearing is critical; it is recommended to participate in the status monitoring function in its depiction stage. Important parameters of the machine operation; for example, sensation and noise can be monitored in succession; preventive measures should be taken before the unpredictable and valuable equipment strikes.
The foundation of training outstanding theory is more than enough ; but proper training is the root of theory. The well-known bearing producers provide a variety of training courses for business, skills or workshop workers. If the skilled personnel have fundamental knowledge in the process of handling the bearing; Then it can prevent serious faults. Descriptive and product development engineers can optimize bearing depiction; maximize equipment utility; minimize life cycle costs.
Bearings are generally important components in pumps and other equipment; although first-class quality bearings are very reliable; but to ensure they have the longest service life; still pay more attention to. Proper storage, careful equipment and disassembly, satisfaction Smooth and smooth, correct condition monitoring, timely protection; and ultimately, perfect personnel training; it is very important for the use of life and equipment for progressive bearing.

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