Inspection specifications for radial bearings and thrust bearings

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Inspection specifications for radial bearings and thrust bearings

Source: Bearing network time: 2014-09-07

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The specifications for radial bearing overhaul are as follows:
.1) Measuring the radial bearing clearance by the pressure lead wire method; the top clearance requirement is 0. 11~0. 14mm,
.2) Measure the back interference of the tile back by the method of pressure lead wire; the value should be 0. 01~0. 03mm, the tile back and the tile seat should be evenly touched; the touch area is not less than 50%,
.3) Use the coloring method to check the touch condition of the shaft diameter and the lower tile; the touch angle is 60o~90o; the touch is evenly touched along the axial direction; the touch area is not less than 80%,
.4) Look at the bearing components; there should be no damage and cracks; the bearing babbitt alloy does not fall off, pores, cracks, grooves and eccentric wear burns,
.5) Some faces of the bearing body should be fastened and well-positioned; the positioning pin does not sway; the anti-rotation pin is firm and firm, and the bearing upper cover is tight; use the feeler gauge to check whether there is a gap in the bisector.
.6) Finishing the bearing box; each oil hole is dredged, and the box body shall not have cracks or oil seepage.
The specifications for thrust bearing overhaul are as follows:
.1) Review the thrust bearing clearance before disassembling; take out the tile in order to make the symbol;
.2) Look at the tile and the upper and lower level blocks and the base ring. These parts should be free from burrs and damage; each contact should be lubricated; no pits or indentations; each support pin and the corresponding level block pin hole are not worn, The appearance of the cassette, the tile and the level block can be swinged after installation.
.3) The babbitt layer of the tile should be free from defects such as abrasion, deformation, cracks, scratches, delamination, rolling and simmering; the touch marks on the thrust plate are uniform; the touch area is not less than 70%; The circumference of each tile is evenly distributed; the thickness difference of the same group of tiles is not more than 0. 01mm; the back bearing surface is flat and lubricated.
.4) The base shall be free from deformation, deflection and misalignment; the bisector shall be tight; the free space shall not be greater than 0.03 mm; the pressure surface shall be free of indentations,
.5) The positioning plate and the gasket should be lubricated and flat; the difference in thickness is not more than 0. 01mm;
.6) View and sort the bearing box; there shall be no appearance of cracks, leaks, etc.; the anti-rotation equipment shall be installed normally; the joint surface of the bearing cap shall be tightly closed; there shall be no defects such as bumps and scratches.
.7) After the reassembly, use the push-axis method to measure the thrust gap; the value is 0. 30~0. 40mm; if the void is over-supported, it can be adjusted by changing the thickness of the inner adjusting gasket; the number of gaskets must not exceed 2 layer.
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