Pump head is a fluid or fluid pressurization machinery.It transmits the mechanical energy of the prime mover or other external energy to the liquid, so that the liquid energy increases.The pump is mainly used to transport liquid such as water, oil, acid and alkali, emulsion, suspended emulsion and liquid metal, and can also transport liquid, gas mixture and liquid containing suspended solids.Pumps can usually be divided into positive displacement pump, power pump and other types of three types of pump according to the working principle.
In addition to classification by working principle, can also be classified and named by other methods.For example, according to the driving method can be divided into electric pump and hydraulic pump;According to the structure can be divided into single-stage pump and multi-stage pump;According to the use can be divided into boiler feed pumps and metering pumps;According to the nature of the liquid can be divided into pumps, oil pumps and mud pumps.According to the shaft structure, can be divided into linear pump, and traditional pump.
Gear pump: simple and compact structure, small volume, light weight, good technology, low price, strong suction, insensitive to oil pollution, large speed range, impact resistance load, easy maintenance, reliable work.
centrifugal pump:
(1)High efficiency and energy saving: CFD computational fluid dynamics is adopted to analyze and calculate the pressure distribution and velocity distribution relationship in the pump, optimize the flow channel design of the pump, ensure that the pump has high efficiency hydraulic profile, and improve the efficiency of the pump.
(2)Easy installation and maintenance: vertical pipe type structure, pump inlet and outlet can be installed in any position and any direction of the pipeline like a valve, installation and maintenance is very convenient.
(3)Stable operation, safe and reliable: motor shaft and pump shaft for coaxial direct connection, high concentricity, smooth operation, safe and reliable.
(4)Stainless steel sleeve: the machine seal position of the shaft is relatively easy to be corroded. Once the direct connection pump shaft is corroded, it is easy to cause the failure of mechanical seal.STG pump is equipped with stainless steel sleeve here to avoid corrosion, improve shaft life and reduce the cost of operation and maintenance.
(5)Bearings: In the motor equipped with the pump, the shaft extension end bearings under Y [Y2] 280 (including the wind blade end bearings under Y180) adopt closed type bearings. During normal use, the maintenance of the motor bearing is exempted.
(6)Machine seal: the basic parts of mechanical seal generally choose the structure of rubber bellows. The traditional seal on the shaft of mechanical seal is changed from the line seal of the O-ring to the two surface seal of the rubber parts, which improves the sealing effect in the clear water medium.
Multi-stage centrifugal pump: multi-stage centrifugal pump and single-stage pump, the difference is that the multi-stage pump has more than two impellers, can be segmenting multi-level water absorption and pressure water, so as to raise the water to a very high position, head can be according to the need to increase or decrease the pump impeller series.Multi-stage pump is mainly used for mine drainage, urban and factory water supply, agricultural irrigation with little, only suitable for high head, small flow of high mountain areas to solve the difficulty of drinking water for people and animals.Multi-stage high core pump has two types of vertical and horizontal multi-stage centrifugal pump pump shaft is equipped with two impellers in series, it is relative to the general single-stage centrifugal pump, can also achieve higher head;Relative to piston pump, diaphragm pump and other reciprocating pump, can also pump a larger flow.The multi-stage centrifugal pump has high efficiency, which can meet the needs of high head and high flow condition, and has been widely used in petrochemical, chemical, electric power, construction, fire fighting and other industries.