(1) The balance of any coupling assembly is determined based on the square root of the possible value of the positional eccentricity between the main axis of inertia of the coupling and the axis of rotation.Its imbalance is expressed in microns.

　　(2) The potential unbalance factors of the coupling components have been introduced above, and the various steps of determining the balance of various types of coupling components and calculating the balance are shown in the calculation examples.

　　(3) Standard sub-table of coupling balance, etc. The following table shows the large deviation of the axis of inertia from the axis of rotation at the position of the balance plane, expressed in large root-mean-square micrometers, and its value is the coupling calculated according to the AGMA method. Large displacement (root mean square) of the main axis of inertia on the balance surface of the coupling balance standard, etc. Coupling balance (root mean square) large displacement of the main axis of inertia on the balance surface (root mean square) of the common coupling balance problem as follows:

　　Due to various reasons, the center of mass or inertial principal axis of the coupling does not coincide with the axis of rotation, and the phenomenon of unbalanced centrifugal inertial force, centrifugal inertial couple force and dynamic deflection (vibration shape) will occur during operation, which is called the unbalance of the rotor. Phenomenon, this imbalance phenomenon will inevitably cause the vibration of the shaft system, thereby affecting the normal operation and service life of the machine, so it is important to pay attention to it.The degree of unbalance (unbalance U) is usually expressed by the product mr of the mass m of the rotor and the distance r from the center of mass to the axis of rotation of the rotor, which is called the mass-diameter product.It is also expressed by the product of mass diameter per unit mass, called eccentricity e (not geometrically eccentric.) The product of mass diameter mr is a relative quantity related to the mass of the rotor, while the eccentricity e is a value that has nothing to do with the mass of the rotor.的量。 The amount.The former is relatively intuitive and is often used for specific balancing operations of a given rotor, while the latter is used to measure the pros and cons of the rotor balance or to check the balance accuracy. The balance of the coupling is evaluated by e.For a flexible rotor, the mode eccentricity (n-th mode) en=Un/mn is used, and Un and mn are the n-th mode and the mass of the first mode, respectively.In order to correct or minimize the unbalance of the coupling, the appropriate balance should be selected according to the needs, and after the product is manufactured and installed on the machine, the balance (correction) plane designated by the coupling is passed Methods to increase or decrease the appropriate quality to achieve balance and other requirements.This process is called balance correction, or balance for short.