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How To Control The Oil Leakage Of Crane Reducer
Jul 22, 2017

1, improve the ventilation cap and check the hole cover PLATE:

Reducer internal pressure is greater than outside atmospheric pressure is one of the main causes of oil leakage, if you try to make the internal and external pressure balance, oil leakage can be prevented. Although the reducer has a breathable cap, but the vent hole is too small, easy to be pulverized coal, oil jam, and every refueling to open the check hole cover plate, open once to increase the possibility of a oil spills, so that the original leak has also occurred. For this purpose, a kind of oil-cup breathable cap was made, and the original thin inspection hole cover plate was changed to 6mm thickness, the oil cup type breathable cap is welded on the cover plate, the vent hole diameter is 6mm, easy to ventilate, realizes the pressure, and refueling from the oil Cup, without opening the check hole cover plate, reduces the oil leakage opportunity.

2, Chang Flow:

To enable the gear to be dumped on the bearing excess lubricant is not accumulated in the shaft seal, must make the excess lubricating oil flow back to the oil pool in a certain direction, that is to do a smooth flow. The concrete approach is in the bearing seat of the lower tile center to open a tilted back to the oil tank, at the same time at the end of the straight mouth is also open a notch, the gap is on the back of the oil tank, so excess lubricating oil through the gap, back to the oil tank flow back.

3. Improving the shaft SEAL structure

1 The output shaft is half shaft of the reducer shaft seal improvement: Belt conveyor, screw unloading machine, impeller coal feeder, and most of the equipment reducer output shaft is half shaft, reconstruction is convenient. The reducer will disintegrate, remove the coupling, remove the reducer shaft seal end cover, according to the matching skeleton oil seal size, in the original end cover outside the car processing groove, install the skeleton oil seal, with the spring side to the inside. If the end cover is more than 35mm from the inside end of the coupling, on the outside of the end of the shaft can be fitted with a spare oil seal, once the oil seal failure, you can remove the damaged oil seal, the standby oil seals into the end cover, thus eliminating the disintegration of the reducer, the demolition of the coupling and other time-consuming and laborious process.

2 The output shaft for the whole shaft of the reducer shaft seal improvement: The whole shaft drive reducer output shaft without coupling, if according to 2.3.1 Programme transformation, the workload is too large and unrealistic. In order to reduce the workload and simplify the installation procedure, a kind of split end cover was designed, and the opening type oil seal was tried. Can be split end cover outboard car processing groove, oil seal when the spring out first, the oil seal saw broken open, from the opening to the oil envelope on the shaft, with a bonding agent will open docking, opening up, and then loaded with spring, push into the end cover can.

4, the use of a new type of sealing materials: for the reducer static sealing point leakage can be used new polymer repair material sticky. If the reducer operation in the static seal point leakage, the surface engineering technology can be used to repair the oil surface emergency adhesive-polymer 25551 and 90T composite materials to block, so as to eliminate the oil spill.

5, earnestly carries out the overhaul craft:

In the reducer overhaul, to seriously implement the process procedures, oil seals can not be reversed, lip mouth do not damage, the outer rim do not deform, the spring can not fall off, the combination of surface to clean up, the sealing glue daub evenly, refueling quantity must not exceed the oil scale scale.

6, Wipe:

Reducer static sealing point through treatment, generally can be achieved without leakage, but the dynamic sealing point due to the aging of seals, poor quality, improper assembly, shaft surface roughness higher reasons, so that the individual dynamic sealing point still has a small leakage, due to poor working environment, coal dust adhesion to the shaft, it appears to be a piece of oil, so need to stop running after the equipment, wipe the oil on the shaft.


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  • +86-551-67753801
    +86-551-67753802
    kw30@kiwicrane.com
    Daguo Industrial Park,Cuozhen,Feidong,Hefei City,Anhui Province,China

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