在精密機床等機械設備中，通常對軸承的精度要求會特別高，所以大多都會采用軸承，而大多數情況下，為了保證軸承的剛性和精度，都會對軸承進行預緊，那么您知道軸承的定位與定壓預緊的區別是什么嗎？下面導軌絲杠廠家為您分析：

In precision machine tools and other mechanical equipment, the accuracy requirements of bearings are usually very high, so most of them will use bearings. In most cases, in order to ensure the rigidity and accuracy of bearings, bearings will be preloaded. Do you know the difference between bearing positioning and constant pressure preloading? The following guide screw manufacturer will analyze for you:

1、徑向預緊法

1. Radial preload method

徑向頂緊法多使用在承受徑向負荷的軸承中，利用螺母調整軸承相對于軸頸的軸向位置，使內圈有合適的膨脹量而得到徑向負游隙，這種方法多用于機床主軸中。

The radial jacking method is mostly used in bearings bearing radial load. The nut is used to adjust the axial position of the bearing relative to the journal, so that the inner ring has an appropriate amount of expansion to obtain radial negative clearance. This method is mostly used in machine tool spindles.

2、軸向預緊法

2. Axial preloading method

軸向預緊法大體上可分為定位預緊和定壓預緊兩種：

The axial preloading method can be divided into two types: positioning preloading and constant pressure preloading:

（1）定位預緊

(1) Positioning preload

在定位預緊中，可通過調整襯套或墊片的尺寸，獲得合適預緊量；也可通過測量或控制起動摩擦力矩來調得合適的預緊；還可直接使用預先調好預緊量的軸承來實現預緊的目的，此時一般不需要再行調整，凡是經過軸向預緊的軸承，使用時其相對位置肯定不會發生變化。

In the positioning preload, the appropriate preload can be obtained by adjusting the size of the bushing or gasket; Appropriate preload can also be adjusted by measuring or controlling the starting friction moment; You can also directly use the bearing with pre-adjusted preload to achieve the purpose of preloading. At this time, it is generally unnecessary to adjust again. The relative position of the bearing with axial preload will not change during use.

（2）定壓預緊

(2) Constant pressure preload

定壓預緊是用螺旋彈簧、碟形彈簧等使軸承得到合適預緊的方法。預緊彈簧的剛性—般要比軸承的剛性小得多，所以定壓預緊的軸承相對位置在使用中會有變化，但預緊量卻大致不變。

Constant pressure preloading is a method to preload the bearing properly by using spiral spring, belleville spring, etc. The rigidity of the preload spring is generally much smaller than that of the bearing, so the relative position of the bearing with constant pressure preload will change in use, but the preload is roughly the same.

軸承的定位預緊與定壓預緊的區別，如下：

The difference between positioning preload and constant pressure preload of bearing is as follows:

（1）在預緊量相等時，定位預緊對軸承剛性增加的效果較大，而且定位預緊時剛性變化對軸承負荷的影響也小得多。

(1) When the preload is equal, the effect of positioning preload on the increase of bearing rigidity is greater, and the effect of rigidity change on bearing load is much smaller when positioning preload.

（2）定位預緊在使用中，由于軸和軸承座的溫度差引起的軸向長度差，內外圈的溫度差引起的徑向膨脹量以及由負荷引起的位移等的影響，會使預緊量發生變化；而定壓預緊在使用中，預緊的變化可忽略不計。

(2) During the use of positioning preload, the preload will change due to the axial length difference caused by the temperature difference between the shaft and the bearing seat, the radial expansion caused by the temperature difference between the inner and outer rings, and the displacement caused by the load; In use, the change of preload can be ignored.

以上就是為大家整理的軸承的定位與定壓預緊的區別，經過預緊的軸承即使承受較大載荷也不會發生較大變形，對延長其使用壽命是十分有利的。您還有什么疑惑或者需求就來我們網站http://www.pet998.com進行咨詢了解吧！

The above is the difference between bearing positioning and constant pressure preloading. The preloaded bearing will not deform even if it bears a large load, which is very beneficial to extending its service life. If you have any doubts or needs, please come to our website http://www.pet998.com Consult and understand!