Tapered roller bearings and water pump bearings of installation and maintenance

Tapered roller bearings and water pump bearings installation should pay attention to the following aspects：
1. bearing installation
Bearing installation must be dry, clean environment. Should be carefully reviewed before mounting the shaft and housing of the mating surfaces, the shrouds of faces, trench and connection surface machining quality. All surface with the connection, must be carefully cleaned and remove burrs, castings, unprocessed surface must be subject to a net residue sand。
Bearing installation before you used petrol or kerosene clean, dry after use, and to ensure good lubrication, bearing grease or oil lubrication. Grease lubrication, you should use no impurity, resistance to oxidation, Rust prevention, extreme pressure properties of high quality grease. Grease fill for bearing and tank volume of 30%-60%, and more. Sealed structure of double row tapered roller bearings and water pump bearings grease filled well, users may not be directly used for cleaning。
Bearing installation must be in the rings of circumference equal pressure exerted on the ring, pressurized into lang may be used in first class tools directly percussion, in order to avoid damages bearing end bearings. In shrink smaller, at room temperature with sleeve bearings with rings rested, lang Tau beating Bush, Bush will ring equilibrium bump into. If the bulk of the installation, you can use a hydraulic press. Press-in, you must ensure that the outer ring side-face with housing shoulder, the inner ring and shaft shoulder end end clamp, there are clearance is not allowed。
When interference is large, with bath heating or sensor heating bearings method to install the heating temperature range of 80 °-100 ° c, the maximum may not exceed 120 degrees centigrade. At the same time, the application of nuts or other appropriate method of fastening the bearings, to prevent the bearing width shrinkage after cooling off the ring and shaft shoulder create gaps between。
Single row tapered roller bearings should be installed at last clearance adjustment. The clearance values should be based on different use conditions and with the size of the degree of interference and specifically identified. When necessary, the test should be carried out. Double row tapered roller bearings and water pump bearings in the factory to adjust the clearance, installation and adjustment。
Bearings should be rotated after installation, first use the test hand Rotary shaft or housing, without exception, to power non-load, low-speed operation and functioning of the rotating speed and gradually increase the load, and detection of noise, vibrations and temperature rise, unusual, and should be stopped and checked. Running test normal before delivery.   
    2. the demolition of bearings: bearings removed after intends to continue to use, you should use the appropriate removal tool. The demolition of the interference fit inner rings, tension can only be added to the ring, must not be allowed through the rolling elements (outer ring) delivered disassembled, otherwise the rolling elements and raceways are.   
    3. bearing the usage environment: according to the use of site and conditions of use and the environmental conditions and select the size, precision, combined with appropriate bearings and bearing life is to guarantee the reliability of the premise.   
    (1) use of site: tapered roller bearings are suitable for bearing with a radial load as the radial and axial load of the joint, typically paired with two sets of bearings, mainly used in automobiles and rear wheel, proactive bevel gear reducer, differential, transmission parts, etc.   
    (2) allows speed: installs correctly, lubrication good environment that allows to limit speed of the bearing 0.3-0.5 times. Normal circumstances, to 0.2 times limit speed for the most suitable.   
    (3) allow tilting angle: tapered roller bearings are generally not allowed to have of the shaft relative shell holes, if the tilt tilted, maximum of 2 '.  
    (4) Temperature:  allows the normal load and lubricant with high temperature performance and insufficient lubrication conditions, the General bearing allow-30 degrees centigrade---150 ℃ ambient temperature.
4.  use of the new input of the pump, usually in running replacement after 100 hours of lubricating grease (oil), each running a 1 500 hours. Greased bearings, 1500 hours after running, you should replace the grease, the amount of oil filling is not too much or too little, because the grease is too much or too little will cause bearing fever, fueling General in bearing Chamber volume of 1/2 to 2/3. For grease lubricated bearings, oil should be added to the required position. Container of lubricating oil or grease container to clean, usually should be sealed well, should not have the dust, iron and other debris, so as not to damage the bearings. Motor bearings generally use sodium base grease, this grease is resistant against high temperature (125 ° c), but the readily soluble in water, so it cannot be used for bearing lubrication pumps.
 

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