Bearing knowledge

Core Tip: Bearing knowledge 1, bearing maintenance In order to maintain the original performance of the bearing in good condition for as long as possible, maintenance, overhaul, in order to prevent accidents, to ensure the reliability of operation,
Bearing knowledge
1, bearing maintenance
In order to maintain the original performance of the bearing in a good condition for as long as possible, it is necessary to maintain, repair, and prevent accidents, ensure the reliability of operation, and improve productivity and economy.
Maintenance is best carried out on a regular basis in accordance with the operating standards for the mechanical operating conditions. The content includes monitoring of operating conditions, replenishment or replacement of lubricants, and periodic disassembly inspections.
As a maintenance item during operation, there are bearing rotation sound, vibration, temperature, lubricant state, and the like.
2, bearing overhaul
Cleaning of the bearing: When disassembling the lower bearing for inspection, first record the appearance of the bearing, confirm the residual amount of the lubricant, and then wash the bearing after sampling the lubricant for inspection. As a cleaning agent, a cleaning agent or kerosene is generally used.
The cleaning of the removed bearings is divided into coarse cleaning and fine cleaning. They are placed in the container respectively, and the metal mesh bottom is placed first so that the bearing does not directly contact the container. In rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash.

Fine washing is to carefully clean the bearing while rotating it in the cleaning oil. In addition, the cleaning oil should always be kept clean.

Bearing inspection and judgment: In order to judge whether the removed bearing can be used, it should be checked after the bearing is cleaned. Check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase of the bearing clearance, and the damage and abnormality that are irrelevant in dimensional accuracy. For non-separable miniature ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to check if it is smooth.
Separate bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.
Large bearings cannot be rotated by hand. Pay attention to the appearance of rolling elements, raceways, cages, and ribs. The higher the importance of bearings, the more careful inspection is required.

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The best conditions for repairing and repairing rolling bearings

Core Tip: Rolling bearings are mass-produced mechanical parts, and the manufacturing precision is very strict, and the degree of specialization in technology is very high. Therefore, for most bearing types that are easy to buy,
Rolling bearings are mass-produced mechanical parts, and the manufacturing precision is very strict, and the degree of specialization in technology is very high. Therefore, for most of the easy-to-buy bearing types, it should be more cost-effective to buy than in the following cases. Only consider the bearing repair problem, namely:
(1) A large number of bearings of the same type used in large factories are mainly in the form of wear on the rolling surface, fatigue or fretting abrasion, especially the damaged parts are mostly cages or rolling elements, and the ferrules or gaskets are still repaired. value;
(2) Large and extra large bearings, which have no major damage to the parts due to failure or failure, or valuable bearings must be managed to extend their useful life;
(3) Some types of bearings that are really difficult to purchase, have no spare parts after failure and have to be repaired, especially imported bearings;
(4) The bearing has slight damage, such as slight rust generated during the inventory period, and slight fretting abrasion caused by transportation. It is a pity that such repair is easy and abandon.
In addition to economics, the repair of the bearing is also technical, which requires the repairer to fully understand the corresponding technical requirements of the bearing, and the structural, technical and material characteristics of the bearing and its parts, otherwise it is difficult to ensure that the bearing repair has The desired effect.
First, the economic benefits of bearing repair
In general, the number of bearings is small, the number is large, the price of a single bearing is high, or the structure of the bearing is simple. If the size is large, the cost of repair is relatively low, and the economic benefit is higher.
In addition, monitoring the operation of the bearing, and planning to repair the bearing before failure, can get twice the result with half the effort. Following a reasonable process, using efficient repair equipment and tools, and getting help from a professional bearing plant can help increase economic efficiency.
Second, the benefits of cooperation with professional bearing companies
In the business of repairing bearings, if the cooperation of professional bearing companies can be obtained, the following benefits may be obtained:
(1) The technical requirements of each process of repair can be clarified, and how to ensure the overall quality of the repaired bearings,
(2) It is possible to utilize many of the specialized experience of specialized bearing plants, which can reliably, efficiently and economically meet process requirements;
(3) It is possible to order a tool for a professional bearing company, which can be economical and saves a lot of trouble;
(4) Orders such as cages, rolling elements, rivets, etc. can be ordered from professional bearing companies, which may make the repair work simple, convenient and economical.

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