What is horizontal multistage centrifugal pump? What is a single stage centrifugal pump? What is the difference between multistage centrifugal pump and single-stage centrifugal pump? It is the content that everyone wants to master for centrifugal pumps such as centrifugal pumps, what is different from metrology verification pneumatic diaphragm pumps?

A single-stage centrifugal pump is a fluid body and liquid, or a mixture of floating particles and vapor or liquid chemicals, into the entrance at the root of the leaf transmission shaft, with the help of rotating the leaf to obtain a centripetal force, and then cause high pressure, from the pressure relief outlet, discharge the material transport equipment. 

Multistage centrifugal pump is to have two of the same function of several pumps together, the structure of the liquid safety channel, its main performance in the front level of the material pressure relief port and the channel after the level is able to be safe between each other, so that the layer by layer of the entrance, the pressure relief port and the channel are all connected, so the series of composition method, produced a multistage centrifugal pump. To set the efficiency of the multistage centrifugal pump is to increase the set working pressure.

Single-stage centrifugal pump includes pump housing, pump cover, motor equipment with output shaft, pump shaft installed in the pump body, bearing with seat, centrifugal impeller, seal and mechanical seal screw cap structural components, the key feature is that it includes the output shaft of the motor and the pump shaft in the middle of a device called a clamp coupling, or installed on the bearing with seat equipment, A guide roller bearing called an assist that supports the pump shaft.

The clamping shaft connector has a connection effect with the motor output shaft and pump shaft stiffness, and in the case of the motor output shaft and pump, the middle of the shaft is the length of the indoor space where the packing seal and the mechanical seal screw cap are easily disassembled. When repairing or replacing the machine seal, it is not necessary to remove the motor and pump cover.

What is the difference between multistage centrifugal pump and single-stage centrifugal pump? Experts tell you that the difference between multistage centrifugal pumps and single-stage centrifugal pumps depends on the total number of centrifugal impellers. The characteristic of multistage centrifugal pump is that the pressure is too large and the total flow rate is small. The single-stage centrifugal pump is only a one-stage centrifugal impeller, which is characterized by low working pressure and large total flow.

A single-pole pump is a pump with only one centrifugal impeller, and the larger pump head is only 125 meters.

Second, the multistage centrifugal pump has two or two centrifugal impellers above the pump, the larger pump lift can exceed the pump lift of the single-stage centrifugal pump; Multi-stage centrifugal pump in the case of single-pole pump head, it must be added to the case of two-stage motor, which can be applied to the four-stage motor according to the number of centrifugal impeller, which can improve the service life of the pump and reduce the noise of the generator set, but the multi-stage centrifugal pump maintenance relative single-pole pump is a little more difficult.

Third, in the pump specific pump lift must not exceed 125 meters, according to the total area of the pump personal studio and the price of the pump, multi-stage centrifugal pump is generally more expensive, but also to take all aspects of the sake of comprehensive consideration, the selection of single-pole pump or multi-stage centrifugal pump.

Fourth, since there is only one centrifugal impeller on the pump shaft of the single-stage centrifugal pump, and there are many centrifugal impels connected on the pump shaft of the multistage centrifugal pump, the multistage centrifugal pump is installed by the centrifugal impeller above the two levels on the same shaft to rotate together, the output of the centrifugal impeller in the front, and then input into the centrifugal impeller in the back, each install a layer of centrifugal impeller leaves. Is called level 1.

The pump installed above 2 is called a multistage centrifugal pump, so the unipolar centrifugal pump is only installed with a centrifugal impeller. In the installation method, this point is different from the metrology verification pneumatic diaphragm pump.

The key of multi-stage centrifugal pump is composed of four parts: motor stator, motor rotor, rolling bearing and pump seal:

1. A key part of the stator of the multistage centrifugal pump motor is composed of the suction section, the central area, the spit out section and the guide vane, etc., and each section is clamped by the tight anchor bolt to form a personal studio. Type D pump generally level suction, vertical upward spit out; When the oil and gas field is filled with water, the import and export trade of the pump is vertical upward. DG type multi-stage centrifugal pump, channel vertical upward.

2, the multi-stage centrifugal pump motor rotor part of the key by the shaft, centrifugal impeller, balancing disc and coupling, etc. The axial force is balanced by the balance plate.

3. The key of multi-stage centrifugal pump rolling bearing is composed of rolling bearing body, rolling bearing and rolling bearing screw cap, etc. The rolling bearing is moistened with vegetable oil or thin oil.