Inspection method for centrifugal compressor thrust bearing

Source: China Bearing Network Time: 2014-10-16

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The primary skill requirements for overhauling thrust bearings are as follows:
a. The thrust gap of the thrust gap thrust bearing fits the need to depict.
b. Thrust pad
(1) The Babbitt layer of the thrust pad should have no defects such as tyre removal, wear, crack, simmering, rolling, napping, erosion and electric erosion. The tile is colored or immersed in oil; Babbitt alloy Excellent connection with the base metal.
(2) The groove or scratch in the radial direction is not allowed on the outer surface of the thrust pad; the depth of the circumferential groove or scratch should not exceed 0. 01mm.
(3) The traces of the same group of tiles should be roughly flat; if the traces of the work are not uniform, the uneven load of the tiles should be clarified; the reason should be found.
(4) Use Red Dan to check the touch condition of the babbitt alloy appearance and the thrust plate surface of each individual tile; the touch area should be no less than 80%; the same group corrugated thickness error should not exceed 0. 01mm.
(5) Lubrication of the bearing surface of the back of the tile; no heavy load such as roasting, gluing and indentation.
(6) Each limit pin is fixed firmly; the pin and the pin hole are free from wear. After the assembly, the tile is shaken freely.
(7) For the thrust pad with the thermal element; the solid state of the thermal element fixed in the tile should be checked; the temperature measurement lead should not affect the sensitive shaking of the tile. The thermal element and the lead together with the tile are viewed from the outside. Insulation and measurement accuracy meet the appearance standards.
c. Base ring and level block
(1) Lubrication of the bearing surface of the leveling block; no heavy-duty marks such as abrasion, grilling, and indentation; shaking and sensitive in the base ring; no jamming. The length of the stop pin is suitable; fixed and firm; and the leveling pin hole is satisfied Void; no top pressure block; no partial grinding pin hole.
(2) There is no indentation on the touch line between the leveling blocks; the surface is lubricated; the level block is shaken after assembly.
(3) The base ring has no buckling deformation; the two half base ring is flat and has a good mouth; there is no indentation at the touch of the level block; the back surface of the base ring and the end face of the thrust bearing shell are evenly pressed. The anti-rotation key on the base ring is fixed. Outstanding; the corresponding keyway on the casing is wear-free.
d. Stop disk
(1) The outer surface of the thrust plate is smooth and flat; the surface roughness Ra is less than 0. 8 m; no radial groove is allowed; the circumferential groove depth should not exceed 0. 05 mm.
(2) The thrust plate connected by the key; the key and the keyway have no kneading marks; the key groove is flaw-detected to see that there is no crack. The thrust plate and the shoulder and the back end face are evenly touched; the key cooperates properly in the thrust plate key groove; The gap between the gap, the top gap and the thrust plate and the shaft is combined to depict the demand. The end face of the thrust plate after assembly is less than 0. 015mm.
(3) When selecting the layout of the hydraulic disassembly and thrust plate; the touch condition of the inner hole of the thrust plate and the outer surface of the shaft should be checked; the touch condition of the end face of the thrust plate and the shoulder should be checked; no less than 80%. No burrs on each surface. Scratches, damages; the cooperation between the hole and the shaft of the thrust disc is not excessive.
(4) The thickness of the thrust plate does not exceed 0. 01mm along the circumference error.
(5) The thrust bearing gap gasket is one piece; it should be lubricated and flat; the thickness error along the whole week is less than 0. 01mm.
(6) The inner and outer diameters of the oil ring are suitable for cooperation; not loose.
(7) Clear the bearing housing; each oil supply hole should match and clear the oil hole on the bearing housing.

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