The advantages and disadvantages of lotion pump heads?

A pump is a machine that delivers fluid or pressurizes fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. The pump is mainly used to transport liquids such as water, oil, acid-base liquid, emulsion, suspension emulsion and liquid metal, as well as liquid, gas mixture and liquid containing suspended solids. Pumps can usually be divided into three types according to their working principles: positive displacement pumps, power pumps and other types of pumps.In addition to the classification according to the working principle, it can also be classified and named according to other methods. For example, according to the driving method, it can be divided into electric pumps and water turbine pumps; according to the structure, it can be divided into single-stage pumps and multi-stage pumps; according to purposes, it can be divided into boiler feed water pumps and metering pumps; according to the nature of the liquid to be transported, it can be divided into Water pumps, oil pumps and mud pumps, etc. According to the shaft structure, it can be divided into linear pump and traditional pump.Today, I will bring you the animation analysis and characteristics of a variety of pumps!01Gear pumpThe teeth of the two gears are separated from each other to form a low pressure, the liquid is sucked in, and the shell wall is sent to the other side. The two gears on the other side close together to form a high pressure to discharge the liquid.Performance characteristicsadvantage:Simple and compact structure, small size, light weight, good manufacturability, low price, strong self-suction, insensitive to oil pollution, large speed range, shock resistance load, easy maintenance, reliable work.shortcoming:Unbalanced radial force, large flow arteries, high noise, low efficiency, poor interchangeability of parts, difficult to repair after wear, can not be used as a variable pump.02Centrifugal pumpThe liquid fills the pump casing, the impeller rotates at a high speed, and the liquid produces high speed under the action of centrifugal force. The high speed liquid passes through the gradually enlarged pump casing channel, and the dynamic pressure head is transformed into a static pressure head.Performance characteristics(1) High efficiency and energy saving: CFD is used to calculate fluid dynamics, and the relationship between pressure distribution and speed distribution in the pump is analyzed and calculated, and the flow channel design of the pump is optimized to ensure that the pump has an efficient hydraulic profile and improve the efficiency of the pump.(2) Convenient installation and maintenance: vertical pipeline structure, the inlet and outlet of the pump can be installed in any position and any direction of the pipeline like a valve, which is extremely convenient for installation and maintenance.(3) Smooth operation, safe and reliable: The motor shaft and the water pump shaft are coaxial and directly connected, with high concentricity, stable operation, safe and reliable.(4) Stainless steel shaft sleeve: The mechanical seal position of the shaft is relatively easy to be rusted. Once the direct-coupled pump shaft is rusted, it is easy to cause mechanical seal failure. The STG pump uses a stainless steel shaft sleeve to avoid corrosion, increase shaft life, and reduce operation and maintenance costs.(5) Bearing: In the motor equipped with the pump, the shaft extension bearing below Y〔Y2〕280 (including the fan blade end bearing below Y180) adopts enclosed bearings. During normal use, maintenance of the motor bearings is not required.(6) Mechanical seal: The base part of mechanical seal generally adopts the structure of rubber bellows. The seal on the shaft of the traditional mechanical seal is changed from the line seal of the O-ring to the two-face seal of the rubber part, which improves the sealing effect in the clean water medium. .03Multistage centrifugal pumpIt is equivalent to multiple centrifugal pumps connected in series with one stage and one stage boosting to obtain a higher pressure head.Performance characteristicsCompared with single-stage pumps, multi-stage centrifugal pumps differ in that they have more than two impellers, which can absorb and press water in multiple stages, so as to lift the water to a very high position. The head can be adjusted according to Increase or decrease the number of pump impeller stages as needed. Multi-stage pumps are mainly used for mine drainage, urban and factory water supply. Agricultural irrigation is rarely used. It is only suitable for high-lift, small-flow high-mountainous water pumping to solve the difficulty of drinking water for humans and animals. There are two types of multi-stage high-center pumps: vertical and horizontal. The pump shaft of the multi-stage centrifugal pump is equipped with two impellers connected in series. Compared with the general single-stage centrifugal pump, it can a