What are the applicable scopes of progressive cavity pumps, centrifugal pumps, gear pumps, and canne

Shanghai Sunshine Pump Manufacturing Co., Ltd. is located in Jinshan Industrial Park, Shanghai, which is a well-known large-scale diversified enterprise integrating research, development, production, sales and service in China, with a registered capital of 80 million yuan. The leading products include: screw pumps, diaphragm pumps, submersible pumps, magnetic pumps, sewage pumps, chemical pumps, multistage pumps, self-priming pumps, gear oil pumps, metering pumps, sanitary pumps, vacuum pumps, submersible pumps, rotary lobe pumps and other categories.

The products have been recognized by various professional certifications and customers with superior performance and excellent quality. The company has a number of pump experts and all kinds of senior engineers, continuous development and manufacturing, upgraded products have come out every year. The company has a domestic high-level pump performance testing center, and all products adopt advanced designs such as CAD design software and CFD computational fluid dynamics software

The progressive cavity pump is suitable for conveying liquids with high viscosity, volatile, crystallization and coagulation, such as petroleum, chemical, food, medicine and other industries. Centrifugal pumps are suitable for conveying low-viscosity, solid-free, and non-gasifying liquids, such as tap water, industrial water, petrochemical, agricultural irrigation and other industries.

Gear pumps are suitable for conveying low and medium viscosity liquids, such as mechanical oil, fuel oil, lubricating oil, hydraulic oil, chemical fluids and other industries. The canned pump is suitable for transporting chemical liquids with high temperature, high pressure, easy crystallization, easy coagulation, easy oxidation, volatile, flammable and explosive, such as petrochemical, metallurgy, light industry, pharmaceutical and other industries. It should be noted that the above is only the general scope of application, and the specific application needs to be comprehensively considered according to the nature of the liquid, working conditions, etc.

Progressing cavity pumps are generally used to transport sewage; Triple screw pumps are generally used for hydraulic pumps. Fully enclosed centrifugal pumps are generally used for fresh water; Open centrifugal pumps are generally used to pump seawater. Internal and external gear pumps are generally used to convey oil. Shielded pumps are generally not used

The centrifugal pump is a liquid conveying machine that rotates the impeller to transfer the mechanical energy to the liquid, so that the liquid can obtain kinetic energy, and the kinetic energy is converted into static pressure energy through the volute. The working principle is centrifugal action, and centrifugal pumps are characterized by a large working range and a change in the head of the pressure head.

The gear pump engages with two gears to push a certain volume (equivalent to the volume between the teeth) of liquid from one side of the twin teeth to the other at a time, characterized by high working pressure (high head), but small delivery process and no change in flow with the head.

Screw pump is similar to gear pump in many aspects, it is a pump that uses the screw to mesh and rotate in the internal thread groove of the pump body to transport liquid, the screw rotates every week, the liquid in the sealing chamber is pushed forward by a pitch, with the continuous rotation of the screw, the liquid spiral is pressed from one sealing chamber to another sealing chamber, and finally extruded out of the pump body. According to the number of screws, there are several types of single screw pumps, twin screw pumps and multi-screw pumps. It is also characterized by high pressure and flow of water.

It can be used for the transportation of molten metal (such as lead, etc.).

1. The name is different, the centrifugal pump uses an impeller, the gear pump uses a gear, and the screw pump uses a screw, 2. The appearance of the centrifugal pump has an impeller shape, and the difference between the pharmaceutical shape of the gear pump and the screw pump is that the former is wide. Flat, short, the latter garden, thick, long.

Shielded pump and gear pump are two different types of high-state open type closed ant pumps, and their structure and working principle are different.

1.Structural differences:

A canned pump is a centrifugal pump that consists of a pump body, impeller, shaft and sealing device, etc. The impeller is usually a single suction impeller or a double suction impeller, there is a certain gap between the pump body and the impeller, and the liquid is sucked in and discharged through the centrifugal force of the impeller.

The gear pump is a kind of forward displacement pump, which is composed of a driving wheel, a driven wheel, a pump body and a sealing device. There is a certain mesh gap between the drive wheel and the driven wheel, and the liquid is sucked in and discharged in the gear gap.

2.Difference in working principle:

The canned pump uses the centrifugal force of the impeller to suck and discharge liquids, and its working principle is similar to that of a centrifugal fan. The liquid is driven by the rotation of the impeller to create a centrifugal force, which is sucked in and discharged.

Gear pumps use the rotation of gears to draw liquids in and out, and their working principle is similar to that of gear transmission. The liquid is sucked in and discharged in the gear gap, and as the gear rotates, the liquid is pushed to the outlet.

3.Application differences:

Shielded pumps are suitable for conveying low-viscosity, clean liquids such as water, petroleum, chemical liquids, etc. It is characterized by high flow, high pressure, high efficiency and low noise.

Gear pumps are suitable for conveying highly viscous liquids containing solid particles or fibers, such as bitumen, paints, syrups, jams, etc. It is characterized by stable flow, high pressure, strong adaptability and high reliability.

Therefore, canned pumps and gear pumps are different in structure, working principle and application, and it is necessary to choose the appropriate pump type according to the specific use requirements.

1) Shielded pump: The shielded pump is a closed structure composed of a motor and a pump, which is not affected by the external environment and can work in any harsh environment, so it is called a shielded pump.

2) Gear pump: Tooth Senkai dismantling wheel pump is an open pump, composed of motor and gear, its mechanical parts are affected by the environment of Sun Jian, easy to be eroded by sediment, pollutants, etc., so it is not suitable for use in acid and alkaline media, harsh environment.

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1. The name is different, the centrifugal pump uses an impeller, the gear pump uses a gear, and the screw pump uses a screw, 2. The appearance of the centrifugal pump has an impeller shape, and the difference between the pharmaceutical shape of the gear pump and the screw pump is that the former is wide. Flat, short, the latter garden, thick, long.

The position of the pump shaft of the centrifugal pump is precisely positioned by the bearing, because the bearing has good lubrication in the bearing housing, the bearing wear is very small, so the mouth ring clearance only considers the vibration of the rotor components.

The pump shaft of the canned pump is positioned by a plain bearing located in the medium (generally impregnated with graphite or silicon carbide), the bearing group has a certain clearance, and the wear of the bearing is greater than that of a centrifugal pump. Therefore, the gap between the mouth ring of the shielded pump is larger than that of ordinary centrifugal pumps.

The pump shaft of the canned pump has a city to east.