Precautions Compared with the general machinery parts, high precision rolling bearings and, therefore, should be careful when using accordingly . 1 ) to keep their surroundings clean bearings 2 ) When using carefully seriously Careless to bearing a strong impact , would appear bearing scars , indentation, fracture and other injuries if used. 3 ) Use the right tools 4 ) Note bearing rust Avoid use in wet locations , and not to sweat stained , you should wear gloves. 5 ) Users should be familiar with bearings 6 ) the development of operational specification of bearings keeping a, bearing b, and the surrounding bearing cleaning c, the size of the installation position of the processing quality inspection d, installation Check the e, after installation f, Demolition g, maintenance ( periodic inspection ) h, additional lubricant
Bearing in custody Bearing at the factory are coated with anti-rust oil and use the right amount of rust-proof paper packaging , as long as the packaging is not damaged , the quality will be guaranteed.
However, long-term storage , to be at a temperature lower than 65% and a temperature of 20 degrees Celsius , the 30cm above the ground is stored in the appropriate rack . In addition , {TodayHot} should keep away the direct sunlight or contact with the cold wall .
Bearing Installation Installation Precautions 1 ) Prepare the bearing Since the bearing rust after treatment and be packaged so than not open the package before installing the Pro .
In addition , anti-rust coating on the bearing oil with good lubricating properties , for general purpose bearings or bearing grease filling can be used directly without washing . But for the instrumentation used for high-speed rotation of the bearing or bearings , application of clean oil cleaning oil will wash away the rust , then bearing rust , can not place a long time .
2 ) examination of shaft and housing Cleaning bearings and housings, confirming that no injuries or mechanical burrs left . There shall be no absolute abrasive (SiC, Al2O3 , etc. ) sand, chips and other housing. Second test shaft and housing dimensions , shape, and the drawing processing quality is found .
Before installing the bearing in the oil with the surface coating mechanical inspection of the shaft and housing.
Bearing installation method Bearing installation method due to bearing type and varies with conditions . As the general multi- axis rotation, and therefore the use of inner and outer rings respectively interference fit with clearance fit , while the outer ring rotates, the outer interference fit .
( 1 ) into the installation Pressed into general use presses installed , can also be used bolts and nuts, hand hammer can be used when forced into the installation. ( 2 ) thermal units installed The bearing is heated in oil before installing it in the heat expansion of the shaft sleeve method allows the bearing force by avoiding unnecessary to complete the installation in a short time .
Heating note: 1 ) Average heating not exceed 100 degrees Celsius. 2 ) do not allow contact with the bottom of the tank bearing . Another hot set can also be used to install the bearing heating induction heating device mounted on the shaft to make it swell again .
Bearing Removal Periodic inspection or replacement parts , you need to remove the bearing . Typically shaft and housing continue to use almost every bearings also tend to continue to use. Thus , taking into account the structural design disassemble bearings , {HotTag} not to damage the bearings , shafts, bearing housings and other components , but also to prepare the appropriate removal tool. When removing static with the ring, only to increase tension on the rings, rings shall be drawn through the rolling elements .
Bearing maintenance In order to give full play to the bearing and maintain its long-term performance should be really good regular maintenance ( periodic inspection ) . Through appropriate periodic inspection , failure to achieve early detection , to prevent accidents in the first place , to improve productivity and economy is very important.
1, cleaning Remove the bearing inspection, the first recorded appearance with good photography and other methods. In addition, to confirm the remaining amount of lubricant and lubricant samples , and then cleaning bearings.
a, bearing coarse washing and cleaning of fine washing, and at the bottom of the container used in the metal grid .
b, coarse wash , brush , etc. used in the oil or grease clear adhesive material . At this point , if the rotation bearings in oil , foreign bodies , such as damage due attention to the rolling surface .
c, sperm washing , in the oil slowly rotating bearings shall be careful . Often used as a neutral cleaning agents without water diesel or kerosene , is sometimes necessary to use warm lye . No matter what kind of cleaning agent used , filter should always be kept clean.
After cleaning, immediately bearing grease coated anti-rust oil or rust . 2, check with the judge In order to determine whether to re-use the removed bearing should focus on checking the accuracy of its size , rotation accuracy , internal clearance and with the surface , raceway , cage and ring.
On the test results, can be judged by those accustomed to bearing or bearings proficient .
Analyzing standard mechanical properties and the degree of importance according to the check period and the like vary. If the following injury , bearings must not be reused and must be replaced .
1) fracture and defect bearing components. 2) things rolling raceway surface stripping. Bearing fault identification method Removing the check is not passed, the operation to identify or predict the presence or absence of a fault in the bearings, to improve productivity and economy are very important.
The main identification methods are as follows: 1) identification by voice There needs identified by the sound experience. Must be adequately trained to recognize bearing achieve sound and non-bearing sound. Therefore, we should try to make this work by hand. Attached to the bearing shell can clearly hear the sound by listening or listening stick.
2) identified by the operating temperature This method is relatively identification method is limited to use in the operation of state is not changing situations. For this reason, the temperature must be continuously recorded. When failure is not only temperature, but also irregular variations.
3) identified by the state of the lubricant Sampling and analysis of lubricants, be judged by the extent of its dirty whether or metal powders mixed with foreign matter. This method does not close observation of the bearing or large bearings are particularly effective.