联轴器所连接两轴的对中，也称找正。轴的准确对中，可使整个传动系统运行平稳，不会产生异常振动、噪声和异常磨损，也不会产生不正常的附加载荷，这对确保系统可靠运行，尤其是对高速回转轴系，具有十分重要的意义。下面导轨丝杠厂家为您讲解更多：

The alignment of the two shafts connected by the coupling, also known as alignment. The accurate alignment of the shaft can ensure the smooth operation of the entire transmission system, without generating abnormal vibration, noise, and wear, as well as abnormal additional loads. This is of great significance for ensuring the safe and reliable operation of the system, especially for high-speed rotating shaft systems. The manufacturer of the guide rail screw will explain more to you below:

事实上任何轴系的安装都会存在不可避免的误差，一般两连接轴的安装偏差可概括为四种情况，即理想对中和存在着径向、角向偏差及径向与角向负荷偏差。

In fact, there are inevitable errors in the installation of any shaft system. Generally, the installation deviation of two connecting shafts can be summarized into four situations, namely, there are radial and angular deviations in ideal alignment, as well as radial and angular load deviations.

实际安装时应使两轴的径向及角向偏差越销越好，这主要是考虑到设备运行过程中不可避免地存在着如基础下沉、各部件的不均匀热膨胀、轴的弯曲、零部件的磨损等各种情况，这些都会对轴系的对中产生不利的影响。

During actual installation, the radial and angular deviations of the two shafts should be as small as possible. This is mainly due to the inevitable existence of various situations during equipment operation, such as foundation sinking, uneven thermal expansion of various components, shaft bending, and wear of components, which can have adverse effects on the alignment of the shaft system.

因此安装时控制径向及角向安装偏差，一般可将其控制在允许偏差的1/8~1/3，这将会为运行过程中产生新的偏移留下一定的补偿空间，从而确保运行时两轴仍能对中良好并运行。

Therefore, during installation, control the radial and angular installation deviations, which can generally be controlled within 1/8-1/3 of the allowable deviation. This will leave some compensation space for new deviations during operation, ensuring that the two shafts can still be aligned well and operate safely during operation.

对于一些高速的回转轴系或发热量比较大、两侧热膨胀量差别比较大的轴系，如果冷态安装时按零偏差对中，那么实际运行时两轴将会产生明显的不对中。

For some high-speed rotating shaft systems or shaft systems with large heat generation and significant differences in thermal expansion on both sides, if zero deviation alignment is used during cold installation, there will be significant misalignment between the two shafts during actual operation.

因此这种情况下，一般应事先测出或算出工作状态时两端的热膨胀量之差，在冷态调整时预留好这一差值，以使其热态运行时能正常对中，从而保证轴系在热态运行时的性。

Therefore, in this case, the difference in thermal expansion between the two ends during operation should generally be measured or calculated in advance, and this difference should be reserved during cold adjustment to ensure normal alignment during hot operation and ensure the safety of the shaft system during hot operation.

两轴对中的方法多种多样，根据轴系工作转速的高低、联轴器类别的不同可分别采用不同的方法。

There are various methods for aligning two shafts, and different methods can be used according to the working speed of the shaft system and the type of coupling.

①利用直尺测量联轴器的同轴度误差，利用塞规测量联轴器的平行度误差。这种方法简单，但误差大。一般用于转速较低、精度要求不高的机器。

① Use a ruler to measure the coaxiality error of the coupling, and use a plug gauge to measure the parallelism error of the coupling. This method is simple, but has a large error. Generally used for machines with low speed and low accuracy requirements.

②用百分表找正队中。采用百分表进行找正对中的方法有许多种，例如单表法、双表法、三表法等。这里介绍一种操作简单，读数、数据处理及调整都很方便，且对中效果也很好的双表法。更多相关事项就来我们网站http://www.jngongrun.com咨询！

② Use a dial gauge to align the line. There are many methods for using a dial indicator for alignment and alignment, such as single table method, double table method, three table method, etc. This article introduces a dual meter method that is easy to operate, convenient for reading, data processing, and adjustment, and also has good centering effect. For more related matters, come to our website http://www.jngongrun.com consulting service