Zhuo Xuanjin Balance Machine - Motor Rotor Dynamic Balance Technology
Published:
2019-09-20 10:20
The world's automotive technology is developing in the direction of energy conservation, environmental protection, safety, etc. The energy consumption of a car is directly proportional to the quality of the car itself. Therefore, in order to reduce unnecessary energy consumption, the quality of the car should be minimized under the premise of ensuring safety. For the automobile, the motor and the body structural parts occupy a high proportion of the whole vehicle quality, and the quality is reduced from the motor and the vehicle body structure, and the weight reduction effect of the motor on the entire vehicle is remarkable.
Motor rotor dynamic balance is one of the dynamic balancing machines. As a member of the balancing machine, its main function is to provide dynamic balance detection and correction for the car generator rotor.
Since the assembled rotor is always unable to achieve axial symmetry in the power during the manufacturing process and during the assembly process, there is a certain amount of unbalance. This amount of imbalance is often referred to as the original imbalance.
Causes rotor imbalance
1. Assembly error, the center line of the quality of one part does not coincide with the center line of rotation when installing.
2. Casting vents
3. Assembly error
4. Half-key problem
5. The rotor is deformed, and the rotor is deformed due to residual stress and uneven heating.
6. There are deposits on the rotor
7. The design is not uniform, such as the side of the motor rotor winding and the other side is not uniform.
Due to the above reasons, the rotor is somewhat unbalanced. The sum of all the unbalanced vectors distributed on the rotor can be considered to be concentrated on one vector. The dynamic balance is a technique for determining the position and size of the unbalanced rotor. The corresponding size of the weight is removed or added at its corresponding position.
Importance of motor rotor automatic positioning dynamic balancing machine
The force generated by the dynamic imbalance, if not corrected, is highly destructive in the rotating equipment, which not only causes damage to the supporting bearing, but also causes cracking of the machine foundation, cracking of the weld seam, and excessive expansion due to imbalance. The amplitude of the product causes a decline in product quality. The centrifugal force due to the imbalance depends on the weight of the rotor's rotational speed.
Motor rotor automatic positioning dynamic balancing machine - rotor dynamic balance method
After the dynamic balance measurement of the rotor of the dynamic balancing machine, the rotor can be balanced by the weighting method and the de-weighting method according to the need: the so-called weighting method, that is, the correction weight is matched in the opposite direction of the imbalance. The de-weighting method removes a certain weight in the unbalanced direction. Commonly used methods are: boring, drilling, chiseling, milling, grinding, etc.
Rotor automatic positioning dynamic balance characteristics
Measured to stop for 3~5 seconds to improve work efficiency;
Precise positioning, no need to worry about the amount is not allowed;
Human-machine exchange interface, memory function for production capacity and real-time production information
Rigid structure design, high service life
The original imbalance is caused by the manufacturing error of the rotor, the assembly error and the uneven material. For example, the dynamic balance does not reach the balance accuracy requirement at the factory, and the vibration is at a high level at the beginning of the application. The vibration amplitude and phase do not change much with the running time, and the vibration characteristics are only related to the speed. At the working speed, the vibration of each operating condition is basically the same, and the vector diagram is stable to a certain allowable range. The dynamic balance method can generally solve the vibration problem caused by the original imbalance.
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