The reasons of speed reducer leakage, and 2019 -
12 -
03 Hu Xu new (
Ganzhou evergreen)
Normally, causing the main speed reducer leakage, there are five reasons: one, reducer, both inside and outside differential pressure in a closed in the reducer, gear mesh mechanical friction heat, according to the Boyle trails by specific law, with the increase of operation time, slow temperature rise gradually, inside the case and the reduction volume inside the case, the casing pressure increases, the lubricating oil splash, sprinkled on the inner wall of the deceleration box.
Lubricating oil under the action of pressure difference, the leakage from the gap.
Processing method: change speed reducer breathable cap to refuel cup, constant pressure difference, put an end to the oil.
Second, the speed reducer structure design is not reasonable or processing problems existed in design of reducer without ventilation hood or peephole cover without vent plug;
Shaft seal structure design is unreasonable, the use of shaft seal oil groove, felt ring type structure, due to the felt compensation performance is poor, lead to seal or failure in a short time;
Though an oil return hole on the oil groove, but easy to jam, oil is difficult to play a role.
Manufacturing process, casting annealing or aging treatment, casting not eliminate internal stress, cause deformation of bearing clearance that oil leakage phenomenon;
There is trachoma, slag inclusion, porosity and crack defects such as;
Machining precision caused by the bad oil, because of the speed reducer box matching surface machining accuracy is not high, tolerance is not appropriate, the existence of such factors as assembly is not in conformity with the requirements, lead to reducer may leak.
Methods: clean and return chute, smooth oil return way;
Reducer wall bearing directly increase return chute, increasing the oil return channel.
Three, amount to excessive speed reducer in the process of operation, the oil pool was badly agitation, lubricating oil and splatter everywhere inside the machine, if the amount is overmuch, make a lot of lubricating oil accumulation in the place such as shaft seal, in combination with surface, lead to leakage.
Processing method: amount to moderation, strict reducer technological requirements of various sizes to be oil.
Four, installation and maintenance process oil spill caused by improper installation accuracy is not high.
Reducer bear huge dynamic load at startup, once the installation precision of speed reducer can not meet the standard demand, will lead to a reducer base bolt looseness, intensifies the vibration of the reducer, the reducer is high, the low speed shaft hole of the sealing ring wear, the lubricating oil flow out.
Equipment maintenance at the same time, due to the combined surface dirt removal is not complete, or sealant improper selection, seal, not timely replacement seal way, etc. , can also cause oil leakage.
Processing method: improve the installation accuracy, no additional dynamic load of reducer, assembly time, thoroughly clean the joint surface for the first time the speed reducer assembly is not recommended sealant.
Five, the incorrect product general reducer HJ - often adopted
40、HJ-
No mechanical lubricating oil, 50 - HL may be adopted
30日,HL -
Gear oil and HJ3-20
28 roll oil lubrication, etc.
Processing method: select lubricating oil strictly according to the provisions of the various types of reducer lubrication requirements, especially the oil cannot mix (
A reducer lubrication grease can only is a kind of oil)
The viscosity reducer lubrication oil as far as possible selection.
In short, we should choose according to the load, speed, temperature conditions, such as the speed reducer of the lubricating oil, blindly pursuing lubricating oil viscosity is bigger, the better is not right.
Static seal point through the governance of the gearbox, generally can be no leakage.
But dynamic seal point due to improper seal aging, poor quality, assembly, shaft surface roughness higher reason, can make a still point has a small leakage of sealing.
Due to poor cement enterprise working environment, dust sticky on the shaft is oily.
So you need to shut down the device, wipe the oil on the shaft.
Phenomenon is the more common speed reducer leakage, and can also be difficult to effect a radical cure.
By adopting the above measures, can largely be control of speed reducer leakage, extend the service life of reducer, to ensure the good and stable operation of the production equipment.
