Generally speaking, there are many factors will cause a decrease in the efficiency of the centrifugal pump, for example
centrifugal pump operating conditions is lower than the pump rated condition, low pump efficiency, high energy consumption; or motor efficiency in the use of basic remain unchanged. And hydraulic loss, including the loss of hydraulic friction and local resistance, etc..
The new type of
centrifugal pump, compared with the mechanical centrifugal pump working efficiency is greatly improved. It broadens the application range of the hydraulic system, the hydraulic system in an efficient and flexible, high power, low cost advantage can play a greater, the application will be for enterprises to bring huge economic benefits and social benefits. Compared with imported similar products, lower production of finished products, is the main factor in its occupation of the market.
The factors of the efficiency of the
centrifugal pump group are analyzed, and the improvement measures are put forward to improve the operation efficiency and reduce the energy consumption of the equipment. The efficiency of several factors affecting the efficiency of
centrifugal pump is the product of three kinds of efficiency, mechanical, volume and hydraulic efficiency. The efficiency of pump group is the product of pump efficiency and motor efficiency. The main factors that cause the low efficiency of the centrifugal pump group are the following
1. Pump itself efficiency is the most fundamental impact. Under the same working conditions of the pump, the efficiency may be a difference of more than 15%.
2. The operating condition of the centrifugal pump is lower than the rated condition of the pump, the pump efficiency is low and the energy consumption is high.
3. Motor efficiency in the use of basic remain unchanged. Therefore, it is important to choose a high efficiency motor.
4. The influence of mechanical efficiency is mainly related to the design and manufacture quality. Pump selected, the late management of small.
5. Hydraulic loss, including hydraulic friction and local resistance loss. After running a certain time, it will inevitably lead to the surface of the impeller and guide vane surface wear, water loss increases, the hydraulic efficiency decreases.
6. Pump volume loss, also known as leakage losses, including the impeller seal ring, the class, the axial force balance between the three kinds of leakage loss. Volume efficiency is not only related to the design and manufacture, but also with the management of the late. After running for a certain period of time, due to the friction between the components, the gap increases, the volume efficiency decreases.
7 as the filter cylinder block, intake and other causes of pipeline centrifugal pump and idling.
8. The pump before the start of the employee does not pay attention to the centrifugal pump before the start of the preparatory work, implementation of the warm pump, drive pumps, infusion pumps and other basic operation procedure is not complete, often caused by the pump cavitation, cause the pump noise, vibration and pump efficiency is low.
Centrifugal pump can be widely used in electric power, metallurgy, coal, building materials and other industries to transport the slurry containing solid particles. Fire power plant hydraulic ash, metallurgical ore dressing plant, pulp conveying coal washery coal slurry and heavy medium conveying etc.. Centrifugal pump work, the pump needs to be placed on the land, the water suction pipe in the water, but also need to pump start. Mud pump and centrifugal pump due to structural constraints, the motor needs to be placed on the surface of the water, the pump into the water, and therefore must be fixed, otherwise, the motor will cause the motor to be scrapped. And because the major axis length is generally fixed, so the pump installation and use more trouble, the application of the occasion by a lot of restrictions.
