The non-clogging pulp pump adopts a half-open or full-open impeller, the clearance between the wear-resistant plate and the front side of the impeller is adjustable, the shaft seal mainly adopts mechanical seal, and high-precision bearings (D-level accuracy) and high-quality shaft materials are selected. Application of non-clogging pulp pump: Horizontal non-clogging pulp pump can be widely used in the light industry and paper industry for the transportation of slurry with temperature below 110℃ and concentration below 6%. It can also be used for industrial and urban water supply and drainage, etc. occasion.
2. Analysis of the advantages of using easy-drive frequency converters on pulp pumps
1. The frequency conversion technology can effectively control the speed of the motor, and has the advantages of wide speed adjustment range, high speed adjustment accuracy, and fast dynamic response;
●Adjustable operating speed: The frequency conversion technology adjusts the output voltage according to the proportion while adjusting the output frequency, thereby changing the motor speed and realizing stepless speed regulation;
●Acceleration controllable: variable frequency speed regulation can start at zero speed and accelerate correspondingly according to requirements. The acceleration curve can be selected according to the design requirements;
●Using microcomputer control technology to control the frequency converter, it can realize a variety of transmission speed regulation functions: various frequency setting and execution, starting, operation mode selection, torque control setting and operation, acceleration and deceleration design and operation, braking Mode setting and execution make the frequency conversion technology more intelligent, and the application field is broader.
2. The protection function of frequency conversion technology is relatively complete, which can effectively control the protection and monitoring of the motor, the life of mechanical parts, and the current and voltage fluctuations of the power grid;
In terms of the loss of mechanical parts, the selection of the motor stop mode (deceleration stop, free stop, deceleration stop and DC braking, etc.) of the frequency conversion speed regulation can reduce the impact of the motor and its linked mechanical parts; dynamically adjust the torque limit to avoid mechanical Does not reduce damage.
3. Frequency conversion technology has significant advantages in energy saving and maintenance.
First, the frequency conversion technology realizes soft start with low starting current. The power of the motor is proportional to the product of current and voltage, and the power consumed by the motor directly started through the industrial frequency will be much higher than the power required for variable frequency start;
Second, the variable frequency speed control motor operates at a low slip rate, which reduces the loss of the motor itself and has high working efficiency. At the same time, as application requirements change, the frequency conversion speed regulation system can quickly and dynamically adjust the speed to minimize power consumption.
3. Features of Easy Drive CV3100 Inverter
1. V/F control mode (one drive multiple) A. Advanced vector control algorithm, optimized SVPWM output, low output harmonics and small motor temperature rise. B. Realize optimal energy-saving operation through motor parameter detection.
2. Open-loop vector control (SVC) mode A. Using TI high-speed motor control dedicated DSP processor, it can complete complex vector calculations at high speed and accurately, and achieve complete decoupling of the motor. B. Using advanced motor model algorithm, 0.5Hz can output 150% rated torque, stable speed accuracy 0.5%, speed regulation range 1:100.
3. Simple PLC completes up to 16 speed control;
4. Built-in PID can easily form a closed-loop control system, which is suitable for process control systems such as pressure and flow.
5. The standard RS485 interface supports MODBUS communication protocol, and can communicate with the host computer such as touch screen, PLC, etc.
6. Complete protection measures can protect nearly 20 kinds of faults such as overvoltage, undervoltage, input phase loss, output phase loss, overload, overheating, overcurrent, external terminal failure, communication failure, current detection error, motor tuning failure, etc. , Higher reliability.
Fourth, the scene picture of the easy drive CV3100 series 500KW inverter cabinet machine used on the consistency pulp pump
Fifth, use the easy drive CV3100 series frequency converter to be used on the consistency pulp pump, so that the system energy consumption is reduced, operating costs are saved, energy saving and environmental protection.