Crane gearbox is one of the most important parts of crane power transmission. Crane gearbox affects the sizing, loading, traveling and operating of overhead cranes. When crane gearbox leaks, it will result in serious crane gearbox failure and may result in crane accidents. To ensure your crane safety, the possible causes to crane gearbox leak are analyzed and related control methods are presented for your sake.
During gearbox operating, due to deputy campaign of friction heat and the affecting of ambient temperature, the gear temperature rise up, If there are no holes or holes blocked, the pressure gradually increase, the higher the internal temperature, the greater the pressure difference with the outside world, the lubricant leak from the crevice under the pressure.
Crane Gearbox Snap
Hoist gearbox
During gearbox operating, oil tank is agitated badly, lubrication oil splashes inside the gearbox, If the refuel over amount, large numbers of lubricating oil accumulate in seals, joint surface, etc., resulting in leaks.
Upon gearbox maintenance, leaks will happen due to joint surface dirt remove not completely or improper sealant selection, seals direction hold reverse, untimely maintenance etc.
Improve access plate and breathable cap, the main reason of leakage is pressure difference inside and outside the gearbox. If pressure balanced can be achieved, leakage will be stopped. The gearbox oil holes is too small to be blocked by coal, dirt etc. It is required to open the hole cover at every refueling, the more frequently refueling the more possibility of leakage. Thus the oil cup type cap is designed, and thicken the access plate to 6mm, then welding the cap on the plate to achieve the balanced pressure. Also the refueling can be through the cap instead of opening it, decreasing the leakage possibility.
In order to make sure the lubricant not accumulate in the shaft seal, some method should be done to make the lubricant flow in a certain direction, the method is called smooth flow. Specific approach is to open an oil groove under the bearing, at the same time, open a gap which is directly lead to the groove at the end cover, thus the extra lubricant will flow through the groove and cap smoothly.
Use novel polymer material as a seal to block the leakage, if the leakage happen in the static sealing point among gearbox operation, 2555 and 90T novel polymer material can be used to prove the leakage.
Among gearbox maintenance, the engineer should strictly follow the requested process, sealing cannot be held reverse, rim should not be at any damage, outer edge no deformation, joint points should be clean up without any dirt, fuel quantity should be within the rated amount.
The leakage can be settled after the improvement of the static sealing point. But due to multiply reasons, the dynamic sealing point is easily to happen with leakage. That is the reason that cleaning up is very necessary to wipe the dirt among gearbox operating stopped.
Crane safety overview is for you to ensure the safety of your remote control overhead crane, gantry crane, jib crane, workstation crane. Tips on crane safety control, safety devices, operational safety, crane inspection and maintenance, crane accidents and crane risk analysis and preventive measure, and crane factory visiting safety, etc., are for your reference.
If have any problem on crane safty, please feel free to contact us. Email: sales@cranesdq.com. WhatsApp/ WeChat: +86 150 3617 7583. Dongqi will assure you the safety of your remote control overhead crane, gantry crane, jib crane, etc.
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Overhead crane: S= Crane Span, H= Lifting height
In order to give you suitable remote control overhead crane safety solution promptly, please help our remote control overhead crane engineer to confirm the following information as much as possible:
If you do not know about how to solve your remote control overhead crane problems, please feel free to leave us a message or email to sales@cranesdq.com. WhatsApp/ WeChat: +86 150 3617 7583. The reply of our remote control overhead crane engineer will be given within 24 hours. Get your custom remote control overhead crane solutions.
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