Single Girder Overhead Crane Maintenance Guide
March 28, 2022
1 Hook (1) Dismantling and inspection of hooks, shafts, horizontal single girder bridge cranes, pulleys, bearings, and cleaning and lubrication (2) Checking the wear condition of dangerous sections (3) Testing of hooks (4) Checking of plate hooks (1) Hooks, single girder bridge cranes, pulley shafts, cracks are not allowed, the threaded part should not be loose, the bearings are in good condition, the pulleys are turned, and the cutters or cracks in the thread withdrawal groove should be replaced.
(2) The wear of the dangerous section exceeding 10% of the original height shall be replaced.
(3) After overhaul, the hook shall be tested and suspended for 10 minutes at a rated load of 1.25 times. The elastic opening of the hook shall not exceed 0.25% of the size of the hook opening. There shall be no permanent deformation and crack after unloading;
(4) After the plate hooks are riveted, the clearance between the plate and the plate should not exceed 0.3mm
2 wire rope (1) wire breakage inspection (2) radial wear (3) deformation inspection (4) wire rope lubrication 1> 1 wire breakage more than 10% of the total number of wires should be scrapped in accordance with the standard 2> wire radial If the wear exceeds 40% of the original diameter, the entire steel wire rope shall be scrapped and the diameter of the wire rope is reduced to 70% of the diameter of the rope. The core of the wire rope is exposed, and the broken stock shall be scrapped and replaced with a new one. 4> Use a wire brush before lubrication. Kerosene and other cleaning, with steel wire rope (Q/SY1152-65) or synthetic graphite calcium-based lubrication finger (SYA1405-65) saturated saturated bridge beam crane suitable 3 pulley (1) single beam bridge crane washing and repair pulley block , Check for cracks (2) Inspection of the pulley groove (3) Inspection of the shaft hole (4) Assembly 1> The pulley shaft must not have cracks, the journal should not wear 30% of the original diameter, and the taper is not more than 5%, exceeding this value should be Replace 2> Check the pulley groove pattern with the model, radial wear should not exceed 30% of the wall thickness, otherwise it should be scrapped. Can not exceed the standard can be repaired, after the overhaul with a model inspection, the bottom and lateral clearance should not be greater than 0.5mm, wheel centerline and pulley centerline deviation should not be greater than 0.2mm, the center of the rope groove on the end of the contour Deviation should not exceed 1mm
3>After overhaul of a single girder bridge crane, the shaft hole is allowed to have defects not exceeding 0.25 CM2, and the depth should not exceed 4 mm
4> After assembly, it should be able to rotate flexibly by hand. The lateral swing must not exceed D/1000. D nominal diameter of the pulley 4 reels (1) reel drum groove (2) reel surface (3) reel shaft (4) assembly and installation 1> rope groove wear more than 2mm should be re-made, overhaul rope groove Should meet the requirements of drawings, but the thickness of the reel should not be less than 81% of the original thickness
2>There should be no cracks on the surface of the drum, there should be no obvious out-of-roundness, the platen screws should not be loose 3> The spool shaft must not have cracks, after major repairs should meet the requirements of the drawings, when the wear exceeds 5% of the nominal diameter , should replace the new 4> reel shaft centerline and the frame support surface should be parallel, the deviation should not be greater 1mm/m, after the installation of the shaft centerline deviation should not exceed 0.15mm single beam bridge crane
