How to ensure the performance of Stainless Steel Sewage Submersible Pump through precision assembly? ​

1. Motor installation: Laying a stable power foundation for submersible pumps ​
As the power source of Stainless Steel Sewage Submersible Pump, the installation quality of the motor plays a decisive role in the operation stability of the pump. At the beginning of assembly, the first task is to accurately install the motor. Before installation, the installation surfaces of the motor and the pump body need to be carefully cleaned to remove impurities such as oil, iron filings, etc. that may exist on the surface to prevent these foreign objects from affecting the installation accuracy. ​
During the installation process, a specific positioning device is used to ensure the accuracy of the motor position. The positioning device pre-sets the installation benchmark according to the design drawings to ensure that the relative position of the motor and the pump body meets the standard. Subsequently, the motor is firmly fixed to the pump body by tightening measures. The tightening operation is not a simple screwing operation, but has strict sequence and force requirements. Tightening the bolts step by step in a specific order can make the motor evenly stressed and prevent installation deviation caused by uneven force; use a torque wrench to control the tightening force to ensure that the tightening degree of each bolt is consistent to avoid loosening or over-tightening and damage to components.​
The concentricity of the motor shaft and the pump shaft is a key indicator for installation. If the concentricity of the two does not meet the standard, strong vibration and noise will be generated during operation, accelerating the wear of bearings and other components, seriously affecting the service life and working efficiency of the submersible pump. To ensure that the concentricity is within the specified range, the assembler will use professional measuring tools, such as dial indicators, to measure the motor shaft and pump shaft at multiple angles. By constantly fine-tuning the position of the motor, the coaxiality error of the two shafts is controlled within a very small range, laying a solid foundation for the stable operation of the submersible pump. ​
2. Impeller installation: realizing efficient conversion of mechanical energy to liquid kinetic energy ​
As one of the core components of the stainless steel sewage submersible pump, the impeller undertakes the important mission of converting the mechanical energy of the motor into liquid kinetic energy and pressure energy. The installation quality of the impeller directly affects the key performance parameters of the pump, such as flow rate and head. Before installing the impeller, the impeller itself needs to be fully inspected to ensure that there are no defects such as cracks and sand holes on its surface, and the shape and size of the blades meet the design requirements. ​
The gap adjustment between the impeller and the pump body is the core link of the installation. The size of the gap has a significant impact on the working efficiency of the pump: if the gap is too large, the liquid backflow phenomenon in the pump will intensify, resulting in increased leakage and a significant reduction in the efficiency of the pump; if the gap is too small, the impeller may rub against the pump body during rotation, generating high temperature, damaging the impeller and pump body, and even causing equipment failure. In order to ensure uniform gaps, special tooling and measuring tools are usually used for measurement and adjustment during assembly. The tooling can assist the impeller in accurately positioning, and measuring tools such as feeler gauges can accurately measure the gap value. According to the measurement results, the assembler fine-tunes the gap by adding or removing gaskets until it reaches the ideal state. ​
When installing the impeller on the pump shaft, ensure that it is firmly installed and accurately positioned. The impeller is generally fixed by key connection or threaded connection. The key connection can transmit a large torque to ensure that the impeller rotates synchronously with the pump shaft; for threaded connections, attention should be paid to the tightening torque to prevent the impeller from loosening and falling off during high-speed rotation. After the installation is completed, the rotation flexibility of the impeller needs to be checked. Turn the impeller manually to feel whether it rotates smoothly and whether there is any jamming phenomenon, so as to ensure that the impeller can work freely and stably in the pump. ​
3. Installation of other key components: Collaboratively guarantee the performance of the submersible pump​
In addition to the motor and impeller, there are many other key components in the stainless steel sewage submersible pump, and their installation should not be ignored. For example, the installation of the mechanical seal device is related to the sealing performance of the pump and directly affects whether the pump will leak liquid. When installing the mechanical seal, it is necessary to strictly follow the operating specifications. First clean the sealing surface to ensure that there are no scratches or impurities on the sealing surface. This is the premise to ensure the sealing effect. Then, install the dynamic ring and static ring of the mechanical seal correctly in the corresponding position to avoid collision and damage to the seal during the installation process. After the installation is completed, the compression of the mechanical seal needs to be checked and adjusted. The appropriate compression can ensure that the seal always maintains a good sealing state during operation. ​
As an important component supporting the rotation of the pump shaft, the installation quality of the bearing affects the running stability and service life of the pump. Before installing the bearing, the bearing needs to be cleaned and lubricated. Cleaning can remove impurities contaminated by the bearing during transportation and storage, and ensure that the inside of the bearing is clean; suitable grease can reduce friction and wear of the bearing and reduce operating temperature. During installation, use appropriate methods such as hot installation or cold pressing to install the bearing on the shaft to ensure that the bearing is installed in place and the force is evenly applied. At the same time, pay attention to the matching clearance between the bearing, the shaft and the bearing seat. Improper clearance will cause abnormal operation of the bearing. ​
Other parts of the pump body, such as guide vanes and pump covers, also have their own installation requirements. The function of the guide vane is to guide the flow of liquid and improve the efficiency of the pump. During installation, it is necessary to ensure that its relative position with the impeller is accurate and the flow channel is aligned; the installation of the pump cover must ensure good sealing to prevent liquid leakage. These parts cooperate with each other to form a complete working system of the stainless steel sewage submersible pump. Any installation error of any part may affect the performance of the entire pump. ​
Fourth, inspection and debugging after assembly: ensure that the performance of the submersible pump meets the standards​
After completing the assembly of all parts, it does not mean that the work is over. The stainless steel sewage submersible pump needs to be fully inspected and debugged. Appearance inspection is the first step, check whether there are scratches, bumps and other defects on the surface of the pump body, whether the parts are fully installed, whether the bolts are tightened, etc. Next, static detection is carried out, and professional instruments are used to measure the insulation resistance of the motor, the DC resistance of the winding and other electrical parameters to ensure that the electrical performance of the motor is normal; check the assembly clearance of mechanical parts, the connection and tightening, etc., to ensure that the mechanical structure meets the design requirements. ​
Dynamic debugging is a key link in testing the performance of submersible pumps. Put the assembled submersible pump into the test pool, turn on the power and let it run. During the operation, monitor the flow, head, current, voltage and other parameters of the pump, and observe the operating status of the pump, such as whether there is abnormal vibration and noise. By adjusting the valves and other devices of the test system, simulate different working conditions and detect the performance of the submersible pump under various conditions. If it is found that the parameters are not up to standard or there are abnormal conditions, it is necessary to stop the machine for inspection in time, analyze the reasons and make adjustments until all performance indicators of the submersible pump meet the design requirements.