lzx@zxjsb.com

020-36969823

Welcome to Guangzhou Zhuoxuanjin Machinert Equipment co.Ltd official website

Search

zuoxuanjin

Guangzhou Zhuoxuanjin Machinert Equipment co.Ltd

18933956581
Customer service team:
在线客服
QQ:
Service time:
0:00 - 24:00

ABOUT US

Follow us

SITE NAVIGATION

CONTACT US

© 2018  Guangzhou Zhuoxuanjin Machinert Equipment co.Ltd  |  All rights reserved 粤ICP备14035600号

 

Contact: Miss Li
Fax: 020-36969822
Tel: 020-36969823
Mobile phone: 18933956581
Mailbox: yingliokok@163.com

SOLUTION

 

Professionally provides dynamic balance detection, correction and dynamic balance cleaning equipment for all types of high speed rotating workpieces (from 500 to 10,000 rpm)

SOLUTION

>
>
>
Sources and methods of expression of unbalance in the rotor

Sources and methods of expression of unbalance in the rotor

Page view
[Abstract]:
Arotorisusuallydesignedsothatitisaxiallysymmetricrelativetotheaxisofrotation.However,duetoaseriesoffactorsintheprocessingprocess,thefinalassemblyoftherotorisalwaysnotabletocompletetheaxialsymmetryofth

A rotor is usually designed so that it is axially symmetric relative to the axis of rotation.However, due to a series of factors in the processing process, the final assembly of the rotor is always not able to complete the axial symmetry of the driving force, there is some imbalance.

Such imbalances are commonly referred to as initial unbalances.The key factors that cause initial unbalance are:

1. Unevenness of rotor materials:

2. Imbalance of coupling:

3. Imbalance caused by asymmetric keyway.

4, rotor processing will always cause some roundness error and eccentricity;

5. Harm of impeller's unbalance;

The unbalance caused by these factors is random and cannot be calculated. Therefore, it should be measured and corrected according to gravity test (static balance) and rotation test (dynamic balance) to reduce it to the permissible level.

FIG. 1 unbalance of a wafer

 

If the thickness of a rotor is divided into glass for Δ z, then each wafer (shown in figure 1) there is a unbalance.It is identified that the unbalanced mass with size G exists in a place with radius r and circumference reference Angle, then the centrifugal force generated by it is:

In the equation, omega is the angular velocity.Therefore, the centrifugal force F increases with the increase of.Therefore, the product of G and r becomes unbalance, which is generally expressed as:

|U| Gr = (or U = Gr)

The unit is usually g mm, then:

So the centrifugal force is directly proportional to the unbalance.

The unbalance is a vector which belongs to the direction and is generally expressed as:

Since the size and direction of each wafer are different (as shown in FIG. 2 and FIG. 3), the rotor's unbalance is a function of the axis coordinates.Because the paper focuses on the dynamic balance of the impeller adjustment, do not do a detailed description.

 

FIG. 2 unbalance of a rotor

FIG. 3 distribution function of unbalance