Centrifugal pump four kinds of mainstream energy-saving technology you know?

At present, the main energy-saving centrifugal pump mainly in the following energy-saving technologies: cutting impeller, frequency conversion technology, three yuan flow technology and special energy-saving pump, here we analyze the characteristics of several energy-saving technologies. Cutting impeller energy saving As we all know, in the centrifugal pump structure, the decision of the size of water and head height is an important part of the impeller. Its working principle is high-speed rotation of the impeller to drive its internal liquid rotation, resulting in centrifugal force. We learned in junior high school physics class, deciding the centrifugal force is an important factor in the radius of rotation, from which we can see that once a centrifugal pump impeller is cut, that is, the diameter of the impeller, then the impeller The centrifugal force inside the liquid will certainly become smaller, the consequences can only be caused by the pump flow, head and other parameters decreased, may cause potential safety problems. Frequency conversion energy-saving technology The main working principle of frequency conversion is to rely on frequency to change the frequency of the pump drive motor, reducing the motor speed to achieve energy-saving effect, the main application of the range: â‘  The motor load with the production conditions need to show a cyclical Change, in this condition, when the production load decreases, the motor load also will reduce the use of inverter technology can make the motor speed at this time to reduce, so as to achieve energy-saving effect, but if the operating conditions The more stable system, the frequency of energy-saving technology will be significantly reduced. â‘¡ adapt to some circulating water system due to design parameters of the larger margin of the pump, the so-called "big horse-drawn car," when there is a certain effect, in this condition, relying on the frequency to change the pump motor frequency, Reduce the pump speed, adjust the pump Q, H value operating conditions, the actual value of the pump is lower than the rated flow of the pump, in order to achieve energy-saving purposes. Centrifugal pumps are designed with similar specific hydraulic speeds under the optimum hydraulic conditions. The geometry of each pump's hydraulic model must be related to its design parameters Q (flow), H (lift), r / min (speed) one by one to produce the final efficiency of the pump. Therefore, the pump impeller hydraulic model and geometry can not change with the speed change accordingly, so the variable frequency speed control of the pump to reduce the rated speed, along with the pump output flow decreases, reducing the pump head, the pump to reduce the actual efficiency, and far Lower than the original efficiency of the pump. When the industrial circulating water system selection of circulating pump performance parameters Q, H value margin is not large, if the use of frequency control of the actual pump parameters Q, H value becomes smaller, it may cause the pump to reduce the flow rate is too large, System cooling water shortage, resulting in cooling water temperature rise. Ternary flow technology Ternary flow technology is to divide the ternary space inside the impeller infinitely. Based on the analysis of each working point in the impeller flow path, a complete and real mathematical model of the impeller flow is established. Through this method, the impeller flow channel analysis can be done the most accurate, reflecting the fluid flow field, the pressure distribution is also the closest to reality. The outlet of the impeller is the flow characteristics of jet and wake (swirl), which is reflected in the design calculation. Therefore, the design of the impeller will be able to better meet the requirements of working conditions, significantly improve the efficiency. However, simply replacing the impeller of an ordinary water pump with a three-way flow impeller may not achieve the desired energy-saving effect because an independent three-way flow impeller can not change the inside of the entire pump with the casing and other components already shaped Water resistance and water loss for all over-current components. Energy-saving special pump energy-saving pumps designed for all types of recycled water system tailored to its comprehensive utilization of various technologies, the siphon principle, the three yuan flow technology and patent perfect combination of technology and energy-saving pumps for the design, open Mold, casting, processing the whole process of clearance control to make it reasonable design, mold to meet the design requirements, and then use advanced casting technology to reduce casting errors, and ultimately through careful processing, grinding, the final product and design concepts match, to achieve Best state. When the fluid circulates inside the energy-saving special-purpose pump, the relative regular flow state can be presented, which can reduce the loss of the inlet impact and the outlet flow, greatly avoiding the appearance of turbulence and reducing the fluid in the single- Of the impact and off flow, and to avoid the formation of water backflow between the blades, the flow of water in the impeller between the closer to the design state, improve the pump flow, reducing waste, reducing energy consumption and improve pump efficiency. Water pumps using this technology can significantly reduce the pump effective shaft power without any changes in flow and fully meet the full load operating conditions of industrial systems will not make the water temperature of the cooling water system increased, With high efficiency, does not change the operating parameters of the system, the normal production has no effect.

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