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挖掘机回转支承的维护保养相关事宜

日期:2022-05-13   来源:http://www.dybocheng.com
加长臂挖掘机工作中,回转支承承受着轴向力、径向力、倾覆力矩等复杂载荷,其合理的维护保养非常重要。我们先从几个方面回答问题。
In the work of extended arm excavator, the slewing ring bears complex loads such as axial force, radial force and overturning moment, and its reasonable maintenance is very important. Let's answer the question from several aspects.
滚道润滑
Raceway lubrication
回转支承的滚动体和滚道容易损坏失效,故障率高。挖掘机在使用过程中,在滚道中加入润滑脂,可以减少滚动体、滚道、隔圈之间的摩擦和磨损。滚道腔空间小,加注油脂阻力大,需用手动注油枪手动加注。回转支承滚道的润滑油嘴一般分布在回转支承外壁的位置。
The rolling element and raceway of slewing bearing are easy to be damaged and invalid, and the failure rate is high. When the excavator is in use, adding grease to the raceway can reduce the friction and wear between the rolling body, raceway and spacer. The space of raceway cavity is small and the resistance of grease filling is large. Manual oil filling is required. The lubricating nipples of the slewing bearing raceway are generally distributed on the outer wall of the slewing bearing.
滚道腔注脂时,应避免“静态注油”、“单点注油”等不良注油方式,因为上述不良注油方式会造成回转支承局部漏油,甚至造成漏油。回转支承的密封成为性的。损坏,导致润滑脂流失,杂质侵入,加速滚道磨损。注意不要混合不同类型的润滑脂,以免过早失效。
When filling grease in the raceway cavity, bad oil injection methods such as "static oil injection" and "single point oil injection" should be avoided, because the above bad oil injection methods will cause local oil leakage of the slewing bearing, or even oil leakage. The seal of the slewing ring becomes permanent. Damage, resulting in loss of grease, invasion of impurities and accelerated wear of raceway. Be careful not to mix different types of grease to avoid premature failure.
内外油封的保养
Maintenance of inner and outer oil seals
回转支承的内外油封为橡胶密封条结构,承受压力小。外油封位于回转支承内齿圈的下表面,防止砂粒等异物进入滚道,造成滚动体和滚道磨损;内油封位于回转支承外圆的上表面,防止内齿圈的润滑。腔内的润滑脂进入滚道腔。回转支承内外油封位置如图4所示。
The inner and outer oil seals of the slewing ring are of rubber sealing strip structure and bear little pressure. The outer oil seal is located on the lower surface of the inner gear ring of the slewing ring to prevent foreign matters such as sand from entering the raceway, resulting in the wear of the rolling body and raceway; The inner oil seal is located on the upper surface of the outer circle of the slewing ring to prevent the lubrication of the inner gear ring. The grease in the cavity enters the raceway cavity. The position of inner and outer oil seals of slewing ring is shown in Figure 4.
在挖掘机使用过程中,应经常检查回转支承的内外油封是否完好。如有损坏,应及时修理或更换。如果旋转电机减速器的密封圈损坏,减速器内的齿轮油会泄漏到齿圈的润滑腔中。上升后润滑脂变稀,变稀的润滑脂被推到内齿圈上端面,并通过内油封渗入滚道,造成外油封渗漏滴油,造成在滚动体、滚道和外部油封加速损坏。
During the use of the excavator, the inner and outer oil seals of the slewing ring shall be frequently checked for integrity. In case of damage, it shall be repaired or replaced in time. If the sealing ring of the rotating motor reducer is damaged, the gear oil in the reducer will leak into the lubrication cavity of the gear ring. After rising, the lubricating grease becomes thinner. The thinner lubricating grease is pushed to the upper end face of the inner gear ring and penetrates into the raceway through the inner oil seal, resulting in oil leakage and dripping of the outer oil seal, resulting in accelerated damage to the rolling element, raceway and outer oil seal.
加长臂挖掘机
调整齿轮间隙
Adjust gear clearance
回转支承的齿圈与回转支承减速机的输出齿轮装配时,轮齿的齿隙应通过回转支承的节圆径向跳动的高点来调整。啮合齿隙根据齿轮模数的大小来选择。一般情况下,齿轮的啮合侧隙随着轮齿的增加而相应增加。在挖掘机回转支承内节圆径向跳动较大的点,回转马达减速机齿轮与回转马达齿轮之间的齿隙Sh值大于等于0.03m(m是齿轮模数)。
When the ring gear of the slewing ring is assembled with the output gear of the slewing ring reducer, the backlash of the gear teeth shall be adjusted through the high point of the radial runout of the pitch circle of the slewing ring. The meshing backlash is selected according to the size of the gear module. Generally, the meshing backlash of gears increases with the increase of gear teeth. At the point where the radial runout of the inner pitch circle of the slewing bearing of the excavator is large, the backlash sh value between the slewing motor reducer gear and the slewing motor gear is greater than or equal to 0.03m (M is the gear modulus).
调整齿轮间隙时,注意观察旋转电机减速机与回转平台的连接螺栓是否松动,以免齿轮啮合间隙过大或过小。这是因为如果间隙过大,会在挖掘机起停时对齿轮造成很大的冲击力,容易出现异响;如果间隙过小,会导致回转支承和回转马达减速小齿轮卡死,甚至导致断齿。
When adjusting the gear clearance, pay attention to observe whether the connecting bolts between the rotating motor reducer and the rotating platform are loose, so as to avoid too large or too small gear meshing clearance. This is because if the clearance is too large, it will cause great impact on the gear when the excavator starts and stops, and it is easy to make abnormal noise; If the clearance is too small, it will cause the slewing ring and the reduction pinion of the slewing motor to get stuck, and even cause tooth breakage.
挖掘机回转支承的维护保养相关事宜便是如此了,此外使用期间操作者应注意观察、及时检查,以便排除故障。只有正确、合理地维护保养回转支承,才能确保其正常运转,充分发挥其性能,延长其使用寿命。更多内容的了解您可以来网站www.dybocheng.com咨询。
This is the case for the maintenance of the slewing ring of the excavator. In addition, the operator should pay attention to observation and timely inspection during use, so as to eliminate the fault. Only by correctly and reasonably maintaining the slewing ring can it ensure its normal operation, give full play to its performance and prolong its service life. For more information, you can visit www.bodycheng.com Com consulting.


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