Worm gear reducer is a compact structure, large transmission ratio, and the transmission machinery with self-locking function under certain conditions, is one of the most commonly reducer, which hollow shaft worm gear reducer not only has more than features, and ease of installation, reasonable structure, more and more widely used. The hollow shaft worm gear reducer in the worm gear reducer input side installation of a helical gear reducer, multistage speed reducer constituted to obtain a very low output speed, is the combination of the helical gear stage and the worm gear stage than that of pure The single-stage worm reducer has a higher efficiency. Small vibration, low noise, and low energy consumption.
Common problems and their causes:
1.Reducer fever and oil spills,
2.worm wheel wear,
3.transmission helical gear wear,
4.bearings (the worm at) damage.
1.Reducer fever and oil spills. Worm gear reducer in order to improve efficiency, generally are non-ferrous metals do the worm wheel, the worm using the harder steel, because it is the sliding friction drive, during operation, will produce a higher amount of heat, so that the various parts of the gear unit and the sealing between the thermal expansion difference, which gap is generated in the mating surface, while oil thinning due to temperature rises, likely to cause leakage. There are four main reasons, First, the mix of materials is reasonable meshing friction surface quality lubricants select add correct assembly quality and use of the environment.
2.worm wheel wear. General tin bronze worm gear and the the worm material generally paired with 45 steel hardened to of HRC45 a 55, also commonly used 40C: hardened HRC50 a 55, and to worm grinder grinding roughness RaO. 8 fcm reducer normal operation worm as a hardened rasp kept cutting and filing worm gear, worm gear blemishes. Generally, this is very slow wear, like some factory reducer can be used for more than 10 years. If the wear is faster, it is necessary to consider the gearhead selection is correct, whether running overload, worm material, assembly quality, or use of environmental and other reasons.
3.transmission helical gear wear. Generally occurs in the vertical installation of the gear unit, primarily concerned with the choice of the added amount of the lubricating oil and lubricating oil. Vertical installation, it is likely to cause the lubricant oil shortage, the loss of transmission gear oil, motor and reducer reducer stops running gear without proper lubrication protection, start-up or during operation can not be effectively lubrication lead to mechanical wear and even damage.
4.the the worm bearing damage. Reducer failure, even if the gear box is well sealed, the plant still often find gear reducer oil has been emulsified, bearing rust, corrosion, damage, operation and stop the process because of the speed reducer, gear oil thermal cooling generated moisture condensation caused; course, closely related to the quality and bearing, the assembly process methods.
Solution:
(1) to ensure the quality of the assembly. Purchase the plant and homemade some special tools, demolition and installation reducer worm gear, worm, bearings, gears and other components in order to ensure the quality of assembly, try to avoid using a hammer and other tools directly percussion; replacement gear, worm, as far as possible selection of Genuine Parts pairs replacement; assembly output shaft tolerances D ≤ 50mm using H7 / k6 D> 50mm, using H7/m6 the anti viscosity or Hongdan of oil at the same time you want to use, protect hollow shaft to prevent wear rust, prevent mating area scale difficult to disassemble and repair.
(2), the selection of the lubricating oil and additives. Worm gear reducer is generally used in 220 # gear oils, some heavy load, frequent start reducer poor use of the environment, the plant also selected some lubricant additives (such as Yasuharu chemical companies can be good), reducer stopped, the gear oil is still attached to the gear surface, forming a protective film to prevent contact between the heavy-load, low-speed, high torque and start metal and metal. Also contains additives ring modifiers and anti-leakage agent, the seals remain soft and elastic, effectively reduce lubricant leakage.
(3) the selection of the mounting position of the reducer. The position allows case, try not to use the vertical installation. Vertical installation, lubricant additive amount than the level of installation a lot more easy to to cause the reducer heat and oil spill. Plant introduction of 40,000 bottles / 'pure draft beer production line, some vertical installation, after some time after the operation, the drive pinion wear or damage, the situation has been greatly improved after adjustments .
(4), the establishment of the the corresponding lubrication maintenance system. Plant is based on the principle of the lubrication work "Five of" reducer maintenance done regularly check each reducer have your fancy found oil temperature significantly increased when the work, the temperature rise of more than 40 ° C or the oil temperature exceed 80 ℃, the decline in the quality of the oil in the oil found more copper powder, and can cause abnormal noise phenomenon, immediately stop using and timely maintenance, troubleshooting, replacement of oil before use. Refueling, to pay attention to the oil and position to be consistent, to ensure that the correct reducer lubrication.
