Submersible pump is a common type of industrial pumps. In liquid mechanics, industrial pumps and commercial pumps are used to handle liquid pumps in various situations. Among them, a commercial submersible pump is a pump device that moves liquid substances through its mechanical action and is used for commercial purposes. Submersible pumps mean that the pump body is immersed in the fluid they pump or placed outside the fluid.
The displacement way of the pump can also be divided into positive displacement pumps, impulse pumps, velocity pumps, gravity pumps, steam pumps and valve-less pumps. In addition, there are two basic types of pumps, namely positive displacement pumps and centrifugal pumps.
These classification names will be different in theoretical research or practice. According to the classification in practical use, we will discuss the dynamic pump and displacement pumps, of which the more common are centrifugal pumps and positive displacement pumps.
The structure of the displacement pump varies greatly, but the concept is the same. Taking advantage of the incompressible nature of the liquid and the change in the volume of the pump, the positive displacement pump squeezes out the liquid in the pump and delivers new liquid from the inlet. At a fixed speed, the displacement pump basically has a fixed flow rate. Displacement pumps can be classified into two types, reciprocating and rotary, according to the volume change pattern.
All power pumps use a rotating impeller to convert the mechanical energy of the motor into fluid kinetic energy. Therefore, the energy conversion of the power pump is continuous and stable, which can greater flow than the displacement pump.
When the fluid leaves the impeller, it will convert kinetic energy into pressure through different pump structures, Different pump structures include centrifugal pumps, regenerative pumps, and axial flow pumps.
Most of the submersible pumps adopt the structure of power pumps, and especially in centrifugal type. Since the submersible pump needs to be placed in the water, the motor has water seal, oil seal and air seal, these spares can prevent water from leaking into the motor.
When choosing a submersible pump, there are many parameters to evaluate. Choosing the right pump is critical to optimizing the entire system. The following points need to be considered:
Firstly, the type and application of the pump.
Secondly, the maximum discharge flow rate, which involves the maximum pressure the pump can withstand.
Thirdly, horsepower, which means mechanical energy.
And finally, the discharge size of the submersible pump should be evaluated.
In general, pumps can be operated with multiple power sources, such as manual operation by humans, electric motors, and even wind power. These power source devices come in a variety of shapes and sizes, ranging from microscopes for medical use to large industrial pumps for water supply systems, or ordinary-sized industrial pumps for machine tool coolant transmission.
In commercial applications, pumps have a wide range of applications, such as pumping water from wells, aquarium filtration work, pond filtration tasks, water cooling and fuel injection in the automotive industry, pumping oil and gas in the energy industry, or used for cooling tower operation.
In the field of machine tools, pumps are used to move cutting fluids and coolants in major equipment. In the medical field, pumps have been developed as artificial substitutes for human body parts, especially artificial heart and penile prostheses.
Submersible pumps can be found in many applications. Single-stage pumps are used for drainage, sewage pumps, general industrial pumps and mud pumps. They are often used in pond filters. Multi-stage submersible pumps are commonly used in residential, commercial, municipal and industrial water extraction, wells and oil wells.
Other uses of submersible pumps include sewage treatment plants, seawater treatment, fire protection, water and deep well drilling, offshore drilling platforms, artificial lifts, mine dewatering and irrigation systems. Pumps in electrical hazardous locations where flammable liquids or water that may be contaminated by flammable liquids must be designed so as not to ignite liquids or vapors.
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