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TIMKEN Bearing motor causes rust is complex, probably TIMKEN bearings rust handled properly, it could be caused by corrosion of moisture and corrosion caused by the mist. Now I told you explain it in detail.
Insulating paint out of the volatile acid components used in the majority of the electrical plant, there are four:
Low molecular weight acids paint raw ingredients ① unreacted (anhydrous iso-phthalic and terephthalic acid, anhydrous maleic acid, fumaric acid).
② paint curing acid components generated (when denatured phenolic paint, formaldehyde water into formic acid).
③ thermal or oxidative decomposition of lower fatty acids (formic acid, acetic acid).
④ paint cured acid composition after hydrolysis generates. The main acid component is produced by formic acid varnish, a close relation between the occurrence of the amount of formic acid and the extent of corrosion to occur.
Adsorption of volatile grease paint out of the acidic components, causing grease deterioration, and this acidic components and promote the hydrolysis of fat, resulting in an increase in the concentration of acidic components, bearings TIMKEN cause corrosion.
Grease works, is the use of internal and external fat layer ball raceway separate from, the use of oil viscosity characteristics dependent on the ball and raceway surface, separating the ball rolling metal interface with internal and external channels, reducing the metal surface wear and protect the metal from corrosion of air and moisture, reduce vibration and noise, TIMKEN bearings can make smooth rotation.
But the grease deterioration, the viscosity will change, the film broke wear, grease and adhesive properties of functional separation will disappear, the consequences produced.
First, make insulating paint acidic components produced by direct oxidation of metal surfaces, causing the bearing corrosion.
Second, causing the ball to touch directly with the inner and outer raceway, wear occurs when rotated, causing the noise increases.
Temperature conditions (1) measurement of
When the ambient temperature measurement requirements of 20 ℃, which bearing blocks, standard temperature and measuring instruments must be the same, put them in the same way as the above piece of metal plates can be the fastest way to achieve the necessary temperature balance, otherwise take several hours or even days to achieve this balance.
In order to get the correct measurement results, the measurement relies on foreign manpower in order to avoid contact with the mechanization of these objects, or wear insulated gloves to operate.
(2) measurement area
TIMKEN bearings for measuring inner or outer diameter of domestic regulations in each plane left the southern tip of the ferrule is a maximum chamfer coordinates within the measurement area, and foreign multi-rings at both ends of the provisions of the left side of each double chamfer coordinates within the measurement area.
(3) the size of the benchmark requirements
Bearing dimensional tolerances in measurements using comparative measurements of right, blocks or standard dosage prescribed as a comparative measure of the size of the reference, wherein the amount of the block must meet the standards JB/T1078 "Block" requirement, standard parts factory must meet the competent authorities requirements.
(4) The provisions of measuring instruments
When measuring instruments used must be calibrated, and has a measured TIMKEN bearings precision fit and amplification ratio.
Measurement error (5) allowed
Measurement error in principle permissible tolerance of less than 10%.
Pressure (6) probe radius and measurement tables
To reduce the measurement error may be within the range of the measurement table strive to reduce the pressure - measuring force and increase the radius of curvature of the probe.
When measuring TIMKEN bearings inner and outer diameters, used to measure the force and the radius of curvature of the probe may refer to the selection.
The spindle (7) used for the measurement
The basic requirement when measuring taper bearing Kia, Kea and Sd other projects, the cylindrical bore bearings used in the provisions on the principle of taper spindle taper is 1/5000-l/10000, uranium for tapered bore bearings, taper spindles are used 1/12.
(8) measuring the load required
When measuring Kia, Kea and Sia, Sea and other items necessary to be applied to measure the load, the rolling body and the contact rings in the normal position, to obtain a stable measurement value.
(9), measuring datum
For general import TIMKEN bearings, non-print ferrule end face is taken when measuring datum, angular contact ball bearings and tapered roller bearings, thrust load to take to withstand the end face is plane.