santo gantry crane

2013年7月31日星期三

Gantry crane lifting chain maintenance and care instructions

  1 sprocket mounted on single girder  gantry crane  and a swing axle should not skewed. In the same drive sprocket assembly in two end should be in the same plane, the sprocket center distance of 0.5 meters, the allowable deviation of 1 mm; sprocket center distance of 0.5 meters above, the allowable deviation of 2 mm. But not with friction sprocket side phenomenon, if two series move too prone to derailments and accelerated wear. Replacing the sprocket must be careful to check and adjust the offset.

     2 single girder  bridge gantry crane  lifting chain tightness should be suitable, tight increase power consumption, bearing wear; chain is too loose and easily beating off chains. The tightness of the chain: from the middle of the chain lift or pressure, the two sprocket center distance of about 2% -3%.

     3 The new lifting chain is too long or elongation after use, difficult to adjust, remove links to look at the situation, but must be an even number. Single girder  hoist gantry crane  back through the chain link should the locking plate inserted in the outside, locking plate openings shall be rotated in the opposite direction toward.

     4 sprocket wear serious, it should also be replaced with new sprocket and a new chain, to ensure good engagement. Not just a single or a new replacement chain sprocket. Otherwise it will cause poor acceleration engaging new chain or a new sprocket wear. Sprocket tooth wear to a certain extent should be promptly turned over to use (refer to the surface using the adjustable sprocket) to extend the use of time.

     5 The old part of lifting chain with a new chain can not be mixed with, or easy to have an impact in the drive, pull off the chain.

     6 Lifting chain in single girder gantry crane work to remember to add oil. The lubricants must enter roller and inner sleeve with the gap in order to improve working conditions in order to reduce wear and tear.

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