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How to choose the long life of bearings  

2012-11-08 10:56:27|  分类: 技术 |  标签: |举报 |字号 订阅

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从长寿命的观点出发,skf轴承的选择无疑是非常重要的。下面给大家介绍三点在选购轴承时应该注意的问题:
Starting from the point of view of long life, SKF bearings selection is certainly very important. Here to tell you the three issues should be noted that in the purchase of bearings:
(1)选择负荷能力高的轴承型号
轴承选型时应顾及轴承的价格,或采用负荷能力较高但较贵的fag轴承,或就采用普通轴承而另外设法延长其寿命。
(1) high load capacity bearings Model
The bearing selection should take into account the price of the bearing, or fag bearings with higher load capacity, but more expensive, or on the use of ordinary bearing while the other managed to extend its life.
采用有高负荷能力的nsk轴承,例如带凸度的圆柱滚子轴承,带对称滚子的球面滚子轴承,加强型圆锥滚子轴承和球轴承,球沟母线修正过的球轴承,这些有高负荷能力的轴承或因改善应力分布状态,或因滚动体的数目较多而可能有较高的疲劳寿命。
High load capacity nsk bearings, for example, with the crown cylindrical roller bearings, spherical roller bearings with symmetrical rollers, strengthening type tapered roller bearings and ball bearings, ball bearings ball groove bus modified these high load capacity of the bearing or because of improved stress distribution state, or because of the large number of the rolling element may have a high fatigue life.
(2)选择合适的轴承尺寸
要使timken轴承尺寸选得合适,必须精确计算或实际校核轴承的工作负荷、转速和运转温度。
(2) Select the appropriate size of the bearing
To make timken bearings size is chosen, must be accurately calculated or actual check of bearing load, speed and operating temperature.
负荷对ntn轴承寿命的影响最大,所以负荷虽然最难测量但也要尽可能测得准确。当负荷测量有困难时,可测量电动机实际消耗功率,按传动路线推算并扣除沿程功率损失,直至计算出较为接近实际的轴承负荷。计算或测得的负荷量偏大,轴承可期望的疲劳寿命必然以更大的幅度减小,必须设法加以补救。如果安装部位允许,可选尺寸大一档的轴承;如果径向尺寸有限制,在有较宽koyo轴承的情况下应选较宽的轴承;如果无法利用较宽的轴承,可改用负荷承载能力较高的轴承。
Maximum load ntn bearings life, so the load, although the most difficult measurement to the fullest extent possible measured accurately. When load measurement difficulties, can measure the actual power consumption of the motor, transmission line projections and less power loss along until closer to the actual bearing load calculated. Calculated or measured load is too large, the fatigue life of the bearings can expect is necessarily greater amplitude decreases, and must try to remedy the situation. If the installation site allows optional size bearing freshman profile; radial size is limited, wide koyo bearings wide bearings should be selected; If you can not take advantage of the wider bearing, could be replaced by a load-carrying higher capacity bearings.
(3)选择合适的轴承材料
选择iko轴承材料也要顾及它的价格,而且当不得不采用真空冶炼或电渣重熔钢时,要注意必须使润滑条件完善化,才能成倍地提高轴承的可期望疲劳寿命。当然,选用这类优质钢材所制轴承的费用要比选用负荷能力较高的轴承贵得多,但对于在机器中难于接近且极难装拆的ina轴承,或矿井、隧道中作业机械所用轴承,检修极为困难的场合,有时仍必须考虑使用。
 (3) Select a suitable bearing material
Select iko bearings material to take into account the price, and had to use the vacuum smelting or ESR steel, perfect attention to the need lubrication conditions to exponentially increase the bearing can be expected fatigue life. Of course, the choice of the kind of high-quality steel bearing the cost of the system much more higher load capacity than the selection of the bearing your bearings, but difficult to access and difficult to dismantle the machine ina, or mine, tunnel operating machinery bearing maintenance extremely difficult occasions, sometimes still have to consider using.

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