What is standard of hydraulic turbine bearing repair
Radial bearing inspection standard is as follows:
(1) the method of lead wire was used to measure the radial clearance, the gap at the top of the requirements of 0.11 ~ 0.14 mm;
(2) by measurement of lead wire back over surplus quantity, its value should be 0.01 ~ 0.03 mm; Tile back in contact with the bowl should be uniform, the contact area of not less than 50%;
(3) the painting was employed to check the diameter of axle and the watts of contact, contact Angle of 60 ~ 90 o, o along the axial uniform contact and contact area of not less than 80%;
(4) check the bearing parts, should have no damage and crack, babbitt bearing without peeling, porosity, crack, groove with partial grinding burns;
(5) part of the bearing body tight and good fit, and a positioning pin not shake, stop pin is firm and reliable; After the bearing cover tightly, with feeler check whether there is a gap split;
(6) clean the bearing box, the oil hole flow; Body can not have crack, oil leakage phenomenon.
Thrust bearing inspection standard is as follows:
(1) remove the review before the thrust bearing clearance, and in turn to take out the segment ready, convenient to install;
(2) check the tile block and base ring and upper and lower levels; These parts should be no burr, damage, the smooth touch each other, no pit, indentation, the support pin with the corresponding standard piece of pin hole without wear, unsmooth phenomena; After the assembly block segment and level can swing freely;
(3) tile babbit layer should be no wear, deformation, cracks, defects such as scratches, delaminating, crushing and burning, and thrust plate uniform contact pattern, the contact area of not less than 70%, and uniform along the entire circumference of each segment, segment thickness difference is greater than 0.01 mm, not your editing back carrying surface level off is smooth;
(4) the base shall be no deformation, deflection and hi-lo, split should closely, between free state is not greater than 0.03 mm, pressure surface without indentation;
(5) positioning plate and gasket should be smooth, level off, the thickness difference is not greater than 0.01 mm;
(6) check clearing bearing box, can not have the phenomenon such as cracks, leakage, normal anti-rotating device assembly, bearing cover joint face rigorous good, must not have bruising, scratches and other defects;
(7) after loading axis method was used to measure the thrust clearance, its value is 0.30 ~ 0.40 mm, such as excessive clearance, can be used to change the method of the medial adjusting shim thickness adjusted, gasket amount shall not exceed 2 layer.
