南京INA轴承离心失效的报废根本

通过对失效的南京INA轴承外观的检测，发现保持架裂纹、***挤压缺口、滚珠表面剥落、***压痕、周边槽疲劳剥落严重、内圈端部。表面不异常，内径略微有爬行腐蚀痕迹。

By inspecting the appearance of the invalid Nanjing INA bearing, it is found that the cage crack, foreign body extrusion notch, ball surface peeling, foreign body indentation, fatigue peeling of the peripheral groove and inner ring end are serious. The surface is not abnormal, and the inner diameter has a slight trace of creeping corrosion.

泵轴承外圈有裂纹和轴向裂纹。在对称方向的外表面上存在严重的腐蚀痕迹。轴向线标记在环的表面可见。外环有明显的断裂，没有磨痕，炭化后有黑色油渍。

There are cracks and axial cracks in the outer ring of the pump bearing. There are serious corrosion marks on the outer surface of the symmetry direction. The axial line marks are visible on the surface of the ring. The outer ring has ***ious fracture, no grinding marks, and black oil stains after carbonization.

轴承在设备运行的初始阶段是正常的，这表明设备的运行不会对轴承造成严重的损坏。整修一个月后，出现异常情况，表明问题正在发生，并在整修期间迅速加剧。笼子和钢球表面。

Bearings are normal at the initial stage of equipment operation, which indicates that the operation of the equipment will not cause serious damage to the bearings. One month after the renovation, an abnormal situation occurred, indicating that the problem was occurring and rapidly intensified during the renovation. The surface of cage and steel ball.

根据南京INA轴承电厂提供的运行条件，通过校核计算，可以看出6号油浴润滑剂能够满足轴承的运行条件，轴承也出现了碳化物黑斑缺点。F润滑油。润滑油就足够了。

According to the operating conditi*** provided by Nanjing INA bearing power plant, through checking calculation, it can be seen that No. 6 oil bath lubricant can meet the operating conditi*** of bearings, bearing also appeared carbide black spot shortcomings. F lubricating oil. Lubricating oil is enough.

根据轴承的结构及工作特点，外圈出现深脱落，滚道的应力状态将发生很大变化，呈现出开裂的趋势，然后迅速膨胀。裂纹的外部痕迹也表明裂纹从疲劳根本开始并逐渐扩展到裂纹。

According to the structure and working characteristics of the bearing, the outer ring appears deep shedding, the stress state of the raceway will change greatly, showing a cracking trend, and then rapidly expanding. The external marks of cracks also indicate that cracks start from fatigue and gradually extend to cracks.

南京INA轴承外圈的高活动性腐蚀标记表示轴承区域的对称分布，而高活动性质腐蚀区域中的轴向线性标记分析轴承方向(对应于轴承表面在轴上的分离)。阀座和轴承上轴承区异常情况。

The high activity corrosion mark of Nanjing INA bearing outer ring indicates the symmetrical distribution of the bearing area, while the axial linear mark in the high activity corrosion area analyzes the bearing direction (corresponding to the separation of the bearing surface on the shaft). Abnormal condition on upper bearing area of valve seat and bearing.

南京INA轴承面积的异常分布必然导致滚道载荷的异常，导致轴承的早期疲劳损伤和膨胀。考虑到泵轴的挠度影响轴系的动态平衡，轴承将产生较大的离心力，导致轴承过载。

The abnormal distribution of bearing area in Nanjing INA will inevitably lead to the abnormal raceway load and the early fatigue damage and expansion of bearing. C***idering that the deflection of the pump shaft affects the dynamic balance of the shaft system, the bearing will produce greater centrifugal force, resulting in bearing overload.

但是，由于轴承固定在外圈上，当作用在离心力上的环形滚子的小（偏心径向载荷）应该是外圈时，内圈将向偏心方向收敛，这与设计翅片的失效是不一致的。

However, since the bearing is fixed on the outer ring, when the ***all (eccentric radial load) of the ring roller used for centrifugal force should be the outer ring, the inner ring will converge to the eccentric direction, which is not c***istent with the failure of the design fin.

经过多年的使用，由于内外温差和磨损等因素，轴承座孔的尺寸会产生较大的误差。如果南京INA轴承座上存在圆度误差，外圈就会受到挤压变形、异常载荷、异常载荷，从外圈通过滚珠、保持架、内圈驱动，导致内圈满是划痕，外圈槽双珠矛盾。

After many years of use, due to internal and external temperature difference and wear and other factors, bearing seat hole size will produce greater error. If there is roundness error on Nanjing INA bearing seat, the outer ring will be subjected to extrusion deformation, abnormal load, abnormal load, from the outer ring through the ball, cage, inner ring drive, resulting in the inner ring full of scratches, outer ring groove double ball contradiction.

环区域或多支承区域具有两个可移动的腐蚀痕迹，并保护轴承外圈缺点。当齿条开裂时，内环槽表面的疲劳和脱落一致。因此，引起轴承早期失效的异常载荷不会引起离心力和轴变形，圆度误差是由外圈的挤压变形引起的。

The ring area or multi supporting area has two movable corrosion traces and protects the bearing outer ring. When the rack cracked, the fatigue and shedding of the inner ring groove surface coincide. Therefore, the abnormal load which causes the early failure of bearing will not cause centrifugal force and shaft deformation, roundness error is caused by extrusion deformation of outer ring.

文章来自：南京SKF轴承 www.wh-skf.com

The article is from: Nanjing SKF bearing www.wh-skf.com

文章来自：南京INA轴承 www.ina-china.cn

The article is from: Nanjing INA bearing www.ina-china.cn

文章来自：南京NSK轴承 www.klbbearings.com

The article is from: Nanjing NSK bearing www.klbbearings.com

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