The ZSC650-IV-1/2 soft tooth surface reducer designed with a flat oil pool may have certain limitations in terms of lubrication uniformity, heat dissipation efficiency and maintenance convenience. Especially under heavy load or continuous operation conditions, it may easily cause problems such as insufficient local lubrication, high oil temperature and difficulty in cleaning residual oil.
1. Uneven lubrication distribution can easily lead to local wear of gears
In the flat oil pool design, the lubricating oil level is horizontal, and the oil immersion depth of high-speed and low-speed gears is quite different:
Insufficient oil immersion of the high-speed pinion : Due to its small diameter, its ability to carry oil during rotation is weak. If the oil level is low, it is difficult to form a continuous oil film, and dry friction on the tooth surface is prone to occur, leading to pitting corrosion or gluing;
The low-speed large gear is immersed in oil too deeply : When the oil immersion depth is too large, the oil churning resistance of the gear increases, which not only causes extra power consumption, but also easily produces foam, affecting the lubrication effect.
In contrast, the inclined oil sump can make the oil immersion depth of the gears at all levels more reasonable through angle optimization, while the flat oil sump lacks such adjustment capabilities.
2. The heat dissipation efficiency is low and the oil temperature is easy to rise.
The flow of lubricating oil in the flat oil pool mainly relies on gear stirring and lacks natural circulation driving force:
Obvious heat accumulation : The lubricating oil stays at the bottom of the box for a long time, making it difficult to effectively transfer the heat generated in the gear meshing area to the box wall for heat dissipation;
Local oil temperature is too high : Under long-term operation, the oil temperature at the bottom of the oil pool may exceed 70°C, which accelerates the oxidation and deterioration of the lubricating oil and shortens the oil change cycle;
Inclined oil pools use liquid level differences to promote oil flow circulation and enhance heat dissipation capabilities, while flat oil pools do not have this advantage.
3. The oil change is not complete and it is difficult to clean up the residual oil.
The bottom of the flat oil pool is a horizontal structure. Although the oil drain port is located at the lowest point, there are still the following problems:
Lots of residue in dead corners : Lubricating oil cannot be completely discharged by gravity, and residual oil is easy to accumulate especially at the corners of the box and the reinforcement ribs. The amount of residual oil can reach several liters when changing the oil;
High risk of mixing old and new oil : Residual oil dilutes new oil, reduces additive concentration, and affects lubrication performance;
Impurities are difficult to remove : Metal wear debris and sludge generated during operation are easy to deposit in the flat-bottomed oil pool, and long-term accumulation aggravates the abrasive wear of gears and bearings.
4. Poor adaptability to installation posture and insufficient flexibility
Although the flat oil pool design has relatively loose installation level requirements, it has limitations under special working conditions:
Unable to adapt to tilted installation requirements : If the host equipment needs to be arranged tilted, it is difficult for the flat oil pool to ensure that all gear pairs can be effectively immersed in oil;
The lubrication path is not adjustable : It is impossible to optimize the oil path through a preset angle like the inclined oil pool, resulting in limited lubrication efficiency.
