Why Our WQ Submersible Sewage Pump Outperforms Competitors: Key Features & Benefits

As we all know, the performance of a sewage submersible pump is closely related to the quality and processing of its impeller, which directly affects the pump's efficiency, operating performance, and service life. So, how is our WQ impeller processed?

I. Characteristics of HT200 Cast Iron Material

1. Composition and Performance:

o HT200 is a type of gray cast iron, with a carbon content of about 3.0%-3.5% and silicon content of about 1.8%-2.4%.

o It has good casting properties, wear resistance, and vibration damping, but its toughness is relatively low.

2. Processing Characteristics:

o Moderate hardness, easy to machine.

o High brittleness, so excessive impact force should be avoided during processing to prevent cracking.

II. Structural Features of the WQ Sewage Submersible Pump Impeller

1. Closed Centrifugal Impeller:

o Both sides have cover plates, forming a closed flow passage.

o The blades are three-dimensional curved surfaces, with a complex shape.

2. Applications:

o Designed to transport sewage containing solid particles or fibers, requiring the impeller to have high wear resistance and anti-clogging properties.

III. Processing Technology Flow

1. Casting the Blank:

o Process Selection: Sand casting or lost foam casting is used to ensure the dimensional accuracy and surface quality of the impeller blank.

o Mold Design: The casting mold is made according to the impeller's 3D model to ensure accurate shapes for the flow passage and blades.

o Pouring and Cooling: Control the pouring temperature and cooling speed to avoid casting defects (e.g., porosity, shrinkage).

2. Cleaning the Blank:

o Remove sand particles, oxide scale, and burrs from the surface of the blank.

o Use sandblasting or shot peening to improve surface quality.

3. Rough Machining:

o Equipment: CNC lathe, milling machine.

o Processing Contents:

§ Turning the outer diameter, inner hole, and end faces of the impeller.

§ Milling the basic shape of the blades and removing excess material.

4. Precision Machining of Blades:

o Equipment: Five-axis machining center.

o Processing Contents:

§ Precisely machining the curved surface shape of the blades based on the 3D model.

§ Using ball-end mills to ensure the accuracy and surface finish of the blade profiles.

o Technical Key Points:

§ Proper selection of cutting parameters (e.g., speed, feed rate) to avoid tool wear and machining vibration.

§ Use a layered milling strategy to reduce machining stress.

5. Processing of Cover Plates:

o Equipment: CNC lathe, milling machine.

o Processing Contents:

§ Processing the inner and outer surfaces of the cover plates to ensure they match the flow passages of the blades.

§ Drilling holes for bolts or welding.

6. Polishing the Flow Passage:

o Purpose: To improve the surface smoothness of the flow passage and reduce hydraulic losses.

o Methods:

§ Manual polishing using sandpaper or polishing wheels.

§ For complex curved surfaces, mechanical or chemical polishing can be used.

7. Dynamic Balance Correction:

o Equipment: Dynamic balancing machine.

o Methods:

§ Install the impeller on the dynamic balancing machine to measure any imbalance.

§ Adjust the balance by removing material (drilling holes) or adding weight (placing balancing weights).

8. Surface Treatment:

o Purpose: To improve the wear and corrosion resistance of the impeller.

o Methods:

§ Spraying wear-resistant coatings (e.g., tungsten carbide coating).

§ Applying rust-proof treatments (e.g., coating with anti-rust oil).

9. Quality Inspection:

o Dimensional Inspection: Use a three-coordinate measuring machine to check the geometric dimensions and tolerances of the impeller.

o Non-destructive Testing: Use ultrasonic or X-ray inspection to detect internal defects (e.g., porosity, cracks).

o Performance Testing: Test the hydraulic performance (e.g., flow rate, lift, efficiency) on a dedicated test bench.

IV. Key Technologies in Processing

1. Casting Process Optimization:

o Control pouring temperature and cooling speed to avoid casting defects.

o Use computer simulation technology (e.g., MAGMA software) to optimize the casting process.

2. CNC Machining Technology:

o Use five-axis machining centers to ensure the precision of the blade profiles.

o Use CAM software to optimize tool paths and reduce machining errors.

3. Dynamic Balancing Technology:

o Use high-precision dynamic balancing machines to ensure the stability of the impeller during high-speed operation.

4. Surface Treatment Technology:

o Use polishing, coating, and other technologies to enhance the impeller's wear and corrosion resistance.

As described above, our WQ sewage submersible pump guarantees high quality, ensuring that customers can use it with confidence.

Product Details: WQ Submersible Sewage Pump

If interested, contact us: Contact- Taizhou Yousi Pump Co., Ltd.