Single stage centrifugal pump structural features

Introduction to single stage centrifugal pumps
The single-stage centrifugal pump includes a pump body, a pump cover, an electric motor with an output shaft, a pump shaft, a bearing housing, an impeller, a mechanical seal and a machine gland mounted in the pump body, and is characterized in that it also includes a motor output shaft. a clip-on coupling disposed between the pump shaft and a guide bearing mounted on the bearing housing to assist in supporting the pump shaft; the clip-on coupling is rigidly coupled to the motor output shaft and the pump shaft, respectively There is a space between the motor output shaft and the pump shaft to facilitate the mechanical seal and the machine cover.
Structural features of a single-stage centrifugal pump
The single stage centrifugal pump is characterized in that it further comprises a clip type coupling disposed between the motor output shaft and the pump shaft, and a guide bearing mounted on the bearing housing to assist in supporting the pump shaft; the clip type coupling The shafts are rigidly connected with the motor output shaft and the pump shaft, respectively, and a space distance between the motor output shaft and the pump shaft for facilitating mechanical seal and machine seal gland assembly and disassembly is left. There is no need to disassemble the motor and the pump cover when servicing or replacing the mechanical seal.
The working principle of single stage centrifugal pump
The working principle of the single-stage centrifugal pump is that the centrifugal pump can send water out due to the centrifugal force. Before the pump is working, the pump body and the inlet pipe must be filled with water to form a vacuum state. When the impeller rotates rapidly, the blade causes the water to rotate rapidly. The rotating water flies away from the impeller under the action of centrifugal force, and the water in the pump is After being thrown, the central portion of the impeller forms a vacuum region. The water from the water source is pressed into the inlet pipe through the pipe network under the action of atmospheric pressure (or water pressure). This cycle is not enough, you can achieve continuous pumping. It is worth mentioning here: before the centrifugal pump starts, it must be filled with water in the pump casing before it can be started. Otherwise, the pump body will not be able to complete the liquid absorption, causing the pump body to heat up, vibrate, and not produce water, resulting in “idle”. Damage to the pump (referred to as "gas binding") causes equipment accidents.
Single-stage centrifugal pump features
1. High efficiency and energy saving: CFD calculation fluid dynamics is used to analyze and calculate the relationship between pressure distribution and velocity distribution in the pump, optimize the flow channel design of the pump, ensure that the pump has high-efficiency hydraulic line, and improve the efficiency of the pump.
2, installation, maintenance is convenient: vertical pipeline structure, the pump's import and export can be installed in any position and any direction of the pipeline like a valve, installation and maintenance is very convenient.
3. Smooth operation, safe and reliable: the motor shaft and the pump shaft are coaxial and directly connected, with high concentricity, stable operation, safe and reliable.
4. Stainless steel bushing: The sealing 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 is equipped with a stainless steel bushing to prevent rust, improve shaft life and reduce operating and maintenance costs.
5. Bearing: In the motor equipped with the pump, the Y[Y2]280 below the shaft extension end bearing (including the Y180 lower blade end bearing) adopts the closed type bearing. When it is used normally, the maintenance of the motor bearing is avoided.
6. Machine seal: The mechanical seal base is generally made of rubber bellows structure. 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 clear water medium.
Pay attention to the use of single-stage centrifugal pump
To avoid shaft wear, bushing protection is provided at the shaft through the packing chamber. An O-ring seal is provided between the sleeve and the shaft to prevent air intake or water leakage along the mating surface.
Single-stage centrifugal pump transmission
The pump is driven by a long elastic coupling coupled to the motor. The direction of rotation of the pump is clockwise from the drive end.
Single-stage centrifugal pump use
Mainly used in industrial and agricultural and urban, drainage, fire water supply and so on.

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