Long Shaft Pump: The Reliable Solution for Deep-Well Fluid Transfer

A long shaft pump is a specialized pump designed for transferring fluids from deep wells, reservoirs, or underground tanks. Known for its robust design and ability to operate in challenging environments, long shaft pumps are extensively used in industries such as agriculture, water supply, oil and gas, and power generation. With their ability to handle a wide range of liquids, including water, oil, and chemicals, these pumps are essential for applications requiring consistent and reliable fluid transfer from significant depths.

What Is a Long Shaft Pump?

A long shaft pump is a vertical pump designed to move liquids from deep sources to the surface. It features a long shaft that connects the motor at the surface to the impellers located deep within the well or reservoir. These pumps are ideal for applications where submersible pumps may not be practical due to depth or fluid characteristics.

Long shaft pumps are commonly used to transfer water, chemicals, or other liquids in systems requiring high efficiency and reliability over extended operational periods.

Working principle of long-axis pump:

The suction port of the pump is vertically downward, the outlet is horizontal, vacuum-free startup is required, single foundation installation, the water pump and the motor are directly connected, and the foundation occupies a small area; looking down from the motor end, the water pump rotor component rotates counterclockwise, and the main features are:

1. The design is optimized with hydraulic design software, with performance, and the anti-abrasion performance of the impeller and the guide vane body is fully considered, which greatly improves the life of the impeller, the guide vane body and other parts; the product runs smoothly, safely and reliably, and is highly efficient and energy-saving.

2. The shaft pump inlet is equipped with a filter screen with an appropriate opening size, which effectively prevents large particles of impurities from entering the pump to damage the water pump, while minimizing the import loss and improving the efficiency of the water pump.

3. The impeller of the pump uses a balancing hole to balance the axial force, and the front and rear covers of the impeller are equipped with replaceable sealing rings to protect the impeller and the guide vane body.

4. The pump rotor components include impellers, impeller shafts, intermediate shafts, upper shafts, couplings, adjustment nuts and other parts.

5. The intermediate shaft, water pipe and protective pipe of the pump are multi-section, and the shaft is connected by a threaded coupling or a sleeve coupling; the number of water pipes can be increased or decreased according to user needs to adapt to different underwater depths. The impeller and the guide vane body can be single-stage or multi-stage to adapt to different lift requirements.

6. The pump water pipe is connected by a flange, and there is a guide bearing body between two adjacent sections of the water pipe. The guide bearing body and the guide vane body are equipped with guide bearings, and the guide bearings are made of polytetrafluoroethylene, ceron or nitrile rubber. The protective pipe is used to protect the shaft and guide bearing. When conveying clean water, the protective pipe can be cancelled, and the guide bearing does not need to be connected to external cooling and lubricating water; when conveying sewage, the protective pipe must be installed, and the guide bearing must be connected to external cooling and lubricating water (the water pump is equipped with a self-closing sealing system. After the water pump is stopped, the self-closing sealing system can prevent sewage from entering the guide bearing).

7. The residual axial force of the pump and the weight of the rotor components can be borne by the thrust bearing in the motor support or the motor with thrust bearing. The thrust bearing is lubricated with grease (also known as dry oil lubrication) or lubricating oil (also known as thin oil lubrication).

8. The shaft seal of the pump is a packing seal, and a replaceable sleeve is installed at the shaft seal and guide bearing to protect the shaft. The axial position of the impeller is adjusted by the upper end of the thrust bearing component or the adjusting nut in the pump coupling, which is very convenient.

How to Choose the Right Long Shaft Pump

Selecting the right long shaft pump is essential for achieving performance and efficiency. Consider these factors:

1. The performance of the water pump can be found in the performance parameter table. The parameters listed in the table are the test performance of clean water at room temperature without water pipes and filters under one atmosphere; when calculating the head of the device, the loss of water pipes and filters is estimated as 1m loss for every 5m.

2. The motor system is configured according to γ≤1100kg/M3. YLS is a 6kV motor, and a 10kV motor can be equipped as needed.

3. When ordering, please indicate the model, performance parameters, liquid type, material of main parts, submerged depth L, whether it has a protective tube, etc. of the water pump; when conveying sewage, the size of sewage particles and the specific gravity of sewage must also be provided.

4. It must be indicated when the temperature of the conveyed liquid is greater than 55℃.

A long shaft pumpis a reliable and efficient solution for deep-well fluid transfer in a wide range of applications. Its ability to handle significant depths, high volumes, and challenging fluids makes it an indispensable tool for industries such as agriculture, water supply, and oil and gas.

When selecting a long shaft pump, consider factors such as well depth, flow rate, fluid type, and material construction to ensure it meets your specific needs. With proper maintenance, a long shaft pump can provide long-lasting, high-performance service for your operations.