overhead crane inspection and maintenance of six months

1 ) Check all gear reducer and wear, pitting damage to the Overhead bridge crane tooth surface should not exceed 30% of the engagement surface and a depth of not more than 10% of the original thickness of the tooth (fixed chord tooth thickness ) ; wear of gear tooth thickness percentage of the original tooth thickness does not exceed 15% to 25% ; checks bearing the state ; replace oil .
2 ) Check the large and small wheels condition, lubricate the wheel bearings to eliminate the phenomenon of gnawing track .
3 ) Check the main Bridge gantry crane beam, the beam end whether to open the main seam welding, corrosion phenomena , rust should not exceed 10 % of the original thickness of the main force components whether fatigue cracks ; various rails , brackets are intact ; inspection girder, end beam and tighten the bolt again .
4 ) Check the main beam deformation . Check rail trolley case . Under no-load main beam interference should not exceed their span of 1/ 2000 ; beside the main beam bent inwards level shall not exceed 1 /1500 to measure length ; trolley rail track should produce the phenomenon , the top surface and side rail wear ( sided ) volume must not exceed 3mm.
5 ) Check the KS Crane Group reel , the reel wall wear should not exceed 20 % of the original thickness of the rope groove convex peak does not strain sharp .
6 ) All bolts and tighten the fastening bolts on the crane .

bridge gantry crane girder structure according to the classification by primary forms

1 single girder gantry crane
Single Bridge gantry crane cantilever structure is simple, easy to manufacture and installation, small own quality, main beam, mostly off-track box-shaped frame structure. Compared with the double girder gantry crane, the overall stiffness of the weaker. Therefore, when the starting weight Q ≤ 50t, when the span S ≤ 35m, can use this form. Single girder cranes door main gate leg has L and C forms. Facilitate the manufacture and installation of L-type, the forces better, the smaller their quality, but the leg lifting cargo through space at a relatively small number. C-leg formed inclined or curved shape, the purpose is to have a large lateral space for the goods pass feet.
2 double girder bridge crane
Double girder gantry crane carrying capacity, span, good overall stability, variety, but the quality of their starting weight compared with the same single-girder gantry crane to be bigger, the cost is higher. Depending on the structure of the main beam, can be divided into two box girders and trusses form. It is generally use more box-shaped structure.