How to test the dynamic balance of an electric motor rotor?
Dynamic balance detection and calibration of the motor rotor is an effective method to reduce the operating noise of the motor In the design of rotor dynamic balance correction process, determining the total remaining unbalance of the motor rotor and distributing the total remaining unbalance to several correction planes are the key to rotor dynamic balance process design
Dynamic balance tester:
The dynamic balance tester can be used for supporting the production of dynamic balance machines, retrofitting old dynamic balance machines, and conducting on-site dynamic balance testing. In recent years, with the technological progress of the mechanical industry, the rotational speed of rotating machinery has been increasing, and people's requirements for the vibration and other performance of such products have also been increasing. An important way to improve this performance is to enhance the accuracy and efficiency of dynamic balancing. This instrument was successfully developed for this situation. This instrument has the characteristics of high precision, high accuracy, simple operation, and easy maintenance. The instrument is composed entirely of integrated circuits and the latest microcontroller control. Among them, automatic tracking filtering technology, automatic compensation technology, program control technology, and self-learning technology are adopted, with stable performance.
Commonly used machinery contains a large number of rotating components, such as various transmission shafts, main shafts, rotors of electric motors and steam turbines, collectively referred to as rotors. In an ideal situation, the pressure exerted on the bearings is the same when the rotating body rotates and when it does not rotate, making it a balanced rotating body. However, various rotating bodies in engineering, due to uneven material or blank defects, errors in processing and assembly, and even asymmetric geometric shapes during design, cannot cancel each other out when rotating. The centrifugal inertia force generated by each small particle on the rotating body cannot be balanced. The centrifugal inertia force acts on the machinery and its foundation through bearings, causing vibration, noise, accelerating bearing wear, shortening mechanical life, and in severe cases, can cause destructive accidents. For this purpose, the rotor must be balanced to achieve the allowable balance accuracy level, or the resulting mechanical vibration amplitude must be reduced within the allowable range.
In modern times, there are many balancing methods used in various types of machines, such as single-sided balancing (also known as static balancing) often using a balancing frame, and double-sided balancing (also known as dynamic balancing) using various dynamic balancing testing machines. Low static balance accuracy and long balance time; Although the dynamic balancing test machine can balance the rotor itself well, when there is a large difference in rotor size, different specifications of dynamic balancing machines are often required, and the rotor still needs to be removed from the machine during the test, which is obviously neither economical nor labor-intensive (such as the overhauled turbine rotor). Especially dynamic balancing machines cannot eliminate system vibrations caused by assembly or other accompanying components. Balancing the rotor under normal installation and operating conditions is commonly referred to as "on-site balancing". On site balancing can not only reduce the workload of disassembling and assembling rotors, but also eliminate the need for dynamic balancing machines; At the same time, due to the consistency between the experimental state and the actual working state, it is beneficial to improve the accuracy of measuring unbalance and reduce system vibration. The international standard ISOl940-1973 (E) "Balance accuracy of rigid rotating bodies" stipulates that precision rotors with a balance accuracy of G0.4 must be balanced on site, otherwise balancing is meaningless. In equipment maintenance, the on-site dynamic balancing technology of the whole machine highlights its superiority. Because the rotor inevitably undergoes varying degrees of permanent deformation after prolonged high-speed operation; Friction and wear, all of which can lead to a decrease in balance accuracy. An effective method to solve these problems is to perform on-site dynamic balancing of rotating machinery. In addition, the use of on-site dynamic balancing methods combined with conventional detection methods can also diagnose faults in rotating machinery.
Dynamic balance detection and calibration of the motor rotor is an effective method to reduce the operating noise of the motor In the design of rotor dynamic balance correction process, determining the total remaining unbalance of the motor rotor and distributing the total remaining unbalance to several correction planes are the key to rotor dynamic balance process design
Dynamic balance tester:
The dynamic balance tester can be used for supporting the production of dynamic balance machines, retrofitting old dynamic balance machines, and conducting on-site dynamic balance testing. In recent years, with the technological progress of the mechanical industry, the rotational speed of rotating machinery has been increasing, and people's requirements for the vibration and other performance of such products have also been increasing. An important way to improve this performance is to enhance the accuracy and efficiency of dynamic balancing. This instrument was successfully developed for this situation. This instrument has the characteristics of high precision, high accuracy, simple operation, and easy maintenance. The instrument is composed entirely of integrated circuits and the latest microcontroller control. Among them, automatic tracking filtering technology, automatic compensation technology, program control technology, and self-learning technology are adopted, with stable performance.
Commonly used machinery contains a large number of rotating components, such as various transmission shafts, main shafts, rotors of electric motors and steam turbines, collectively referred to as rotors. In an ideal situation, the pressure exerted on the bearings is the same when the rotating body rotates and when it does not rotate, making it a balanced rotating body. However, various rotating bodies in engineering, due to uneven material or blank defects, errors in processing and assembly, and even asymmetric geometric shapes during design, cannot cancel each other out when rotating. The centrifugal inertia force generated by each small particle on the rotating body cannot be balanced. The centrifugal inertia force acts on the machinery and its foundation through bearings, causing vibration, noise, accelerating bearing wear, shortening mechanical life, and in severe cases, can cause destructive accidents. For this purpose, the rotor must be balanced to achieve the allowable balance accuracy level, or the resulting mechanical vibration amplitude must be reduced within the allowable range.
In modern times, there are many balancing methods used in various types of machines, such as single-sided balancing (also known as static balancing) often using a balancing frame, and double-sided balancing (also known as dynamic balancing) using various dynamic balancing testing machines. Low static balance accuracy and long balance time; Although the dynamic balancing test machine can balance the rotor itself well, when there is a large difference in rotor size, different specifications of dynamic balancing machines are often required, and the rotor still needs to be removed from the machine during the test, which is obviously neither economical nor labor-intensive (such as the overhauled turbine rotor). Especially dynamic balancing machines cannot eliminate system vibrations caused by assembly or other accompanying components. Balancing the rotor under normal installation and operating conditions is commonly referred to as "on-site balancing". On site balancing can not only reduce the workload of disassembling and assembling rotors, but also eliminate the need for dynamic balancing machines; At the same time, due to the consistency between the experimental state and the actual working state, it is beneficial to improve the accuracy of measuring unbalance and reduce system vibration. The international standard ISOl940-1973 (E) "Balance accuracy of rigid rotating bodies" stipulates that precision rotors with a balance accuracy of G0.4 must be balanced on site, otherwise balancing is meaningless. In equipment maintenance, the on-site dynamic balancing technology of the whole machine highlights its superiority. Because the rotor inevitably undergoes varying degrees of permanent deformation after prolonged high-speed operation; Friction and wear, all of which can lead to a decrease in balance accuracy. An effective method to solve these problems is to perform on-site dynamic balancing of rotating machinery. In addition, the use of on-site dynamic balancing methods combined with conventional detection methods can also diagnose faults in rotating machinery.
15 browse