Some processes require high-speed rotation to meet the requirements. For example, some high-speed spindles need to reach 100,000 rpm, and some military applications need to reach 200,000 rpm. If the speed is still not fast enough, it can be enlarged by the speed increase ratio transmission mechanism. Therefore, it is not a problem for the motor to achieve high-speed rotation. The key depends on the size and rotation requirements of the wall breaker itself. Please pay attention: In order to make their products fly to the sky, many small brands of Rongji igniters claim that the speed of their wall breakers can reach 5 10,000 rpm, in fact, the purpose of wall-breaking cooking is to use high speed to instantly break the cell walls of some materials, such as smashing cell fibers, releasing biochemicals, and even allowing nutrients such as bones to be extracted. If the rotation speed is high, the contact between the blade and the material is ideal. The cutting frequency is high, but it should not be too high. Generally, it is about 170,000 to 20,000 rpm, and no higher than 45,000 rpm. , otherwise it may have the opposite effect.
In fact, the shape, length, thickness and quantity of the blade will also affect the cutting effect, and even the shape of the cup body will have different effects. It is necessary to consider the system problem as a whole, so the speed of the motor cannot be seen only.
From a mechanical point of view, power = torque * speed. If the power of the motor does not increase and the speed is high, the torque will decrease. Therefore, when a single blade collides with the material, the speed will also decrease. Many motors are 1 kilowatt. Within the range, blindly pursuing high speed will cause insufficient torque and slow down. Of course, the higher the motor power, the higher the cost will follow, and the long-term electricity bill will also be high.
And the speed is high, the requirements for bearings, dynamic balance, etc. are relatively high, the noise will be large, and it is easy to jam the knife and fly the knife. It is a big problem for material selection and design, and the service life will also be shortened.
Finally, the rotating speed is too high, the friction between the material and the blade will increase, which will cause a lot of heat, and the oxygen in the air will also run in a lot, so the material will definitely have an oxidation reaction, which will really bring a certain amount of nutrition. side effect.
