Roots blower is widely used in the pneumatic conveying system of ceramics, building materials, aquaculture, food and other industries. It is a machine used to transport air and various neutral gases. Overcurrent may also occur when roots blower is used.
The pipeline is blocked because the air outlet of the fan is not smooth, and the air cannot be discharged. The pressure rises, causing the motor to form overpressure and wear, and then causing the equipment ammeter to rise. Misoperation current overload may also be a problem during operation. For example, when the check valve of the device is reversed and the gate valve is not fully opened, such operation may cause instantaneous burning of the motor.
The operation shall be carried out according to the regulations, and unnecessary trouble caused by carelessness shall be avoided. Lubricating oil If the equipment is short of lubricating oil, and the fan continues to operate under the condition of oil shortage, the impeller problems will conflict and the gears will wear each other more, and then increase the motor load, which will only add the motor burden and accelerate the loss.
The blower itself has its own quality problem when it leaves the factory. When installing the blower, many parts have poor clearance cooperation, which will form a rated conflict. In addition, some parts may be damaged, increase the motor load, and cause the fuse to blow. Air outlet problem If the air blower fails to go out, the pressure will rise and the motor load will be increased in the same way, which will lead to excessive current.
The frequency converter of Roots blower shall be selected according to the constant torque load. For the 45kW Roots blower, the rated current of the motor is 84.5A, and the ACS604-0100-375kW frequency converter is selected. Under the general application load, the power of the motor is allowed to reach 7500kW; Under heavy load conditions, the power can reach 55kW, and the output current can reach 168A in one minute within a 10 minute period, which is twice the output current of the motor. In a 15 second period, the output current can reach 224A in two seconds, which is 2.65 times the rated current of the motor, which can meet the requirements of transient overload.
According to different typical industrial objects, many different kinds of application macros are designed. The so-called application macros are preprogrammed parameter sets. Using the application macro can quickly and simply complete the startup of AC600. The application macro reduces the number of parameters that need to be set during the startup process. All parameters have the default values set at the factory. Therefore, the user should determine which application macro to use before debugging the inverter. Once the macro is selected, the user can check, define For frequency converter test selection and adjustment, since there are English prompts in the menu, the physical meaning of each parameter is intuitive and clear, and users can select conveniently.
1. Whether there is no lubricating oil at all parts of the blower; Roots blower needs regular maintenance. When it works in the state of oil shortage, the friction will increase and the motor load will increase, resulting in excessive current.
2. Whether the air outlet of the blower is smooth; If the wind beat cannot go out, the pressure will rise, which will also increase the motor load, resulting in excessive current.
3. Blower quality problems; Poor clearance of many parts will cause additional friction. In addition, some parts may be damaged, increasing the load of the motor, and causing the fuse to blow.
I believe that after reading the above contents, you should also understand the reasons for the excessive current of Roots blower. I hope it will be helpful to you.
Text term label: Roots blower
Link to this article: //wuhanzhcs.com/html/news/n02/678.htm
