Stainless Steel Deep Well Submersible Pump Assembly Line
This multistage vertical submersible pump features a 304/316 stainless steel structure, consisting of a pump section, submersible motor, seals and inlet/outlet parts. It is waterproof, sand-proof and corrosion-resistant.
A matched semi-automatic assembly line uses a conveyor system with tooling and testing stations. It includes bearing press-fitting, assembly, air tightness, hydrostatic and electrical tests. The line is flexible, efficient, cost-effective and suitable for mass production.
Stainless Steel Deep Well Submersible Pump Assembly Lines/Production Lines are suitable to Assemble/Produce Deep Well Submersible Pumps. (If clients have more requirements or want to produce the other pumps, welcome to contact us.)
Structural Description, Images & Assembly Line for Stainless Steel Deep Well Pumps
1. Structural Description of Stainless Steel Deep Well Pump (QJ Series)
The stainless steel deep well pump (QJ type) is a multistage vertical submersible pump consisting of four core components: the pump section, submersible motor section, connection & sealing assembly, and inlet & outlet assembly. The main body is made of 304/316 stainless steel, featuring corrosion and wear resistance, suitable for deep well water lifting, chemical industry, seawater and other applications.
1.1 Pump Section (Upper Part)
- Pump Body (Diffuser): Multistage series structure, precision-cast stainless steel, guides water flow for gradual pressurization; fastened by threads or bolts between stages.
- Impeller: Stainless steel centrifugal/mixed-flow blades, fixed on the pump shaft via a tapered sleeve and key; each stage is equipped with a seal ring (leakage reduction ring) to minimize backflow.
- Pump Shaft: Stainless steel shaft transmitting motor torque, with a shaft sleeve to prevent abrasion; rubber/water-lubricated bearings are installed between multistages for support.
- Check Valve: Built-in one-way valve at the upper part to prevent backwater impact and protect the unit during shutdown.
- Outlet Section: Stainless steel water outlet connected to the riser pipe via flange or thread.
1.2 Submersible Motor Section (Lower Part)
- Motor Cylinder: Thickened stainless steel cylinder, waterproof and pressure-resistant.
- Stator/Rotor: Water-filled wet structure, winding adopts waterproof polyethylene insulated magnet wire.
- Bearing: Water-lubricated sliding bearing, wear-resistant without extra lubrication.
- Sand Control Sealing: Labyrinth sand slinger + double skeleton oil seals (reverse assembly) at the shaft end to prevent mud and sand intrusion.
- Pressure Regulating Device: Rubber pressure regulating membrane with spring at the bottom to compensate for internal pressure changes caused by temperature.
- Inlet Strainer: Stainless steel filter screen at the bottom to filter impurities and protect the impeller.
1.3 Core Connections & Seals
- Coupling: Claw-type/key cylinder type, directly connects the pump shaft and motor shaft to ensure coaxiality.
- Mechanical Seal: Precision-fitted dynamic and static rings, serving as the main waterproof seal to prevent leakage.
- Cable: Special waterproof cable, with waterproof welded joints and multi-layer insulated sealing.
2. Introduction to Suitable Assembly Line (Semi-automatic Type)
The semi-automatic assembly line for stainless steel deep well pumps adopts circular as the core, equipped with universal tooling + special press-fitting/testing equipment, with manual assistance for loading/unloading and precise assembly, balancing efficiency, flexibility and quality control.
2.1 Core Configuration of the Line
- Conveyor System: Circular tooling plate conveyor, station spacing 1.2–1.5m, equipped with pneumatic stoppers and positioning pins, controlled by PLC for start/stop.
- Tooling Fixture: Universal adjustable fixture, adaptable to various pump bodies and motor cylinders, enabling quick positioning and scratch prevention.
- Air & Power Supply: Compressed air pipelines, sockets, electric screwdrivers, tool hooks and process boards.
- Control System: PLC main control + MES (optional) for station monitoring, error proofing, data recording and batch traceability.
2.2 Standard Station Process (10–12 Stations)
- Parts Loading & Inspection: Manual loading of stainless steel parts and motor components, re-inspection of appearance and dimensions.
- Bearing/Shaft Sleeve Assembly: Heating and press-fitting of bearings, grease application and shaft sleeve installation.
- Impeller-Diffuser Pre-assembly: Assembling impellers, seal rings and diffusers stage by stage, positioning and fastening.
- Pump Shaft & Multistage Series Assembly: Inserting the pump shaft into the multistage pump body, correcting coaxiality and locking.
- Motor Section Assembly: Installing stator into the cylinder, press-fitting rotor, assembling oil seals, pressure regulating membranes and sand control components.
- Pump-Motor Docking: Connecting via coupling, correcting coaxiality and torque-tightening bolts.
- Sealing & Cable Assembly: Press-fitting mechanical seals, fixing cables and waterproofing joints.
- Inlet Strainer/Bottom Cover Assembly: Installing filter screen, bottom cover, circlip and check valve.
- Air Tightness Test: 0.2–0.4MPa air pressure holding, leakage detection (no pressure drop for ≥30s).
- Electrical Performance Test: No-load/light-load testing of current, voltage, insulation and temperature rise.
- Hydrostatic Test: 1.5 times rated water pressure holding, checking for leakage and structural strength.
- Appearance Cleaning & Packaging: Cleaning, labeling and boxing.
2.3 Key Special Equipment
- Hydraulic Press: Precision press-fitting of bearings, couplings and seals (adjustable pressure 0.5–10T).
- Torque-controlled Electric Wrench: Torque control and data recording for key bolts.
- Grease Injector: Quantitative grease injection for bearings and sealing positions.
- Vacuum Leak Tester/Air Tester: High-precision leakage detection.
- Electrical Parameter Tester: Online monitoring of current, voltage, insulation resistance and power.
2.4 Advantages of the Line
- High Flexibility: Semi-automatic design for mixed-line production of multiple models, fast model change (within 30min).
- Stable Efficiency: meet clients’ production capacity, balanced manual and automated operation.
- Controllable Quality: Full-process testing, data traceability and error proofing.
- Moderate Investment: 40%–60% lower cost than fully automatic lines, easy maintenance.
Horizontal Tightening Machine for Submersible Pump Outlet Connector
