Duwan Environmental's stainless steel submersible propeller's performance and structure
Illustration of Low-Speed Submersible Propeller Installation
Submersible Propeller - Stainless Steel Material
1、DivingStreamline Structure
（1) The construction of the streamer
EachDivingThe overall design of the flow-through device is enclosed and submersible. All components of the flow-through device, including the motor and gearbox, should be capable of continuous operation underwater. The propeller of the flow-through device is driven by a submersible motor via a reduction gear. The rotating head is streamlined in a cone shape, with a compact structure.
All major components of the pusher that come into contact with the liquid, excluding the support and blades, should be gray cast iron.ASTM A48 Class 35B,Or DIN 1691 GG25The surface is smooth, free of sand holes, blow holes, or other defects. The shell thickness should be sufficient to withstand water pressure and other loads.
All nuts, bolts, and washers AISI 316 Stainless Steel.
Pushers should be machined surfaces on critical contact points requiring watertight seals, using metal and...Metal contact, with nitrile or fluorinated rubber O Form rings, which require a certain amount of torque to achieve a tight fit, and gaskets made of rubber, paper, or chemical compounds with a rectangular cross-section. Secondary sealing compounds, elliptical sealing rings, wool, or other devices are not to be used.
All cast iron surfaces on the external side of the flowmeter that come into contact with liquids should be coated with epoxy resin for protection.
Transmitters and their accessories, as well as cables, should be capable of continuous immersion at greater depths. 20 The water beneath the rice.It will not compromise its watertightness.
（2）Propeller
Propellers should be capable of handling conventional wastewater. All propellers are hydraulically balanced, tangle-free, and self-cleaning in design. Propellers should be meticulously machined and surface treated. They efficiently transfer the motor's output power for mixing and propelling the wastewater flow at the bottom of the pool.
The propeller should have two to three blades. All blades should be of the same design, featuring a swept-back configuration, low RPM, and low energy consumption, with uniform spacing between them.
The blades must be reinforced with spheroidal cast iron ribs and whole-cast polyurethane. The blades should possess“FlexibleThe blades are designed to absorb hydraulic loads as they change. Metal blades are not accepted due to their lack of elasticity. Each blade is equipped with a cast iron shaft installed in a socket on the side of the wheel. The wheel is secured to the shaft with a single key.Ends should be sealed with protective caps and a locking washer system should be used.The propeller has passed dynamic balance testing.
（3）Gearbox
The pump must be driven by a planetary gearbox. The gearbox housing and the pump housing should be integrated into one, forming a streamlined cone shape, with a smooth transition to the wheel hub and motor housing, ensuring high stability and excellent hydraulic properties, thereby enhancing the overall efficiency of the pump. The gearbox should be equipped with high-precision, efficient, and low-load bipolar planetary gears, with gear teeth made of high-wear-resistant alloy steel. The gearbox is filled with oil for lubrication and cooling, and to minimize the impact of leakage.
The gearbox should be manufactured by an internationally renowned transmission specialist. The design lifespan should not be less than 100,000 hours.
（4）Axle
The motor shaft and propeller shaft are connected through a gearbox, with the shafts made of wear-resistant stainless steel. The propeller shaft and motor shaft can withstand all axial and radial loads. The propeller shaft is fully protected by mechanical and radial seals, ensuring isolation from liquids.
（5）Bearings
The shaft of the submersible propeller motor should rotate on two ball bearings, with the propeller shaft supported by two cone roller bearings. All bearings are high-quality, maintenance-free bearings lubricated with grease, capable of withstanding both axial and radial loads.
Bearings in 0.5Qn< Qn<1.25 Qn Operation within scope（ Qn For operating conditions）BearingsPlease provide the Chinese content that needs to be translated into American English. 100,000 Hour plus.
（6）Motor
The潜水motor should be a three-phase squirrel-cage induction motor. The motor's protection grade is IEC IP68 ratingInsulation grade F Level155°C. An appropriate rated power should be ensured to prevent the flow enhancer from overheating during operation.Overload occurred. The motor should be capable of starting every hour. 20 The motor shaft and rotor have passed dynamic and static balance tests.
Motor should be designed for high Operating at 40℃ (104°F), the equipment should be capable of immersing and continuously stirring a liquid at 40℃ while the average temperature rise of the stator winding does not exceed 80℃.
Electric motors and cables must be capable of withstanding 20 Mi Yan Shen Xia maintains its waterproof properties after continuous use.No Chinese content provided, original return: "No content provided." IP68 Protection Rating.
Submersible motors should be sufficiently cooled by the surrounding agitating medium and should not rely on cooling jackets or external cooling.The system should be insulated. Additionally, the motor room should be filled with insulating oil to ensure excellent insulation and cooling properties.Prevent leaks from damaging the motor.
To monitor the temperature on each phase winding, a thermosensitive switch should be installed in each phase stator winding coil. The thermoswitch is set to open at a temperature of 130°C, and connect to the control cabinet, interfacing with the control relay.
（7）Mechanical Sealing
A mechanical seal and two radial seal rings should be installed between the gear box and propeller of the flowmeter. The radial seal rings are placed on a bronze sleeve, providing additional protection to the mechanical seal and should be easy to replace. The shaft seal system should include a sealing oil chamber, where the mechanical seal operates. A pair of radial seal rings should also be installed between the motor chamber and the gear box.
Mechanical seals should be maintenance-free and capable of rotating clockwise or counterclockwise without affecting or losing their sealing function. The mechanical seals are made of silicon carbide, offering excellent mechanical strength and resistance to thermal shock. The pH range of the medium should be 4-10 between.
The design service life of the mechanical seal should exceed 25,000 hours.
（8）Cables and cable seals
The motor should be equipped with a submersible cable, which should be a single cable incorporating both control and power cores.Equipped with a separate and reliable cable import. The cable dimensions should comply with IEC Standard cables are provided with sufficient length to connect to junction boxes or local control cabinets without splicing. The cable entry into the junction room should be sealed with reusable double-channel compression rubber sleeves, and cannot be sealed with epoxy, silicone resin, or other secondary sealing systems. Cable replacement should be ensured. The cable outlet is axially aligned and tightly abuts the outer surface of the motor housing.Arrangement, securing the cables with cable clamps and tensioned steel cables to prevent them from swaying due to water flow impacts, and to avoid snagging during hoisting.
（9）Motor Protection
Thermistor Sensors: All pushers are installed within the stator's three-phase coil 3 Thermistor, simply connected
（PTC）Thermally sensitive protection is used to monitor stator temperature rise. 130Action at °C, activate alarm system.Stop the motor.
Leak Sensors: All pumps should be equipped with leak sensors to detect any leakage within the motor, preventing water from entering and causing damage. The leak sensors should be electrode type, with signals that can be monitored and an alarm signal emitted when water intrusion is detected.
The flow controller's protective relay should receive the alarm signal from the leakage sensor and output a fault trip contact to automatically disconnect the motor power and stop the motor. The flow controller's protective relay is installed inside the local control cabinet.The power requirement is AC220V. Protective relays should be provided with the pusher.
DivingPusher Performance
The flow directors must be submersible and horizontally installed; other types of flow directors are unacceptable. The flow directors should be adjustable for up and down movement, easily movable, and should allow for convenient removal for inspection or service without requiring personnel to enter the pool or well.
The submersible flow enhancer should be a complete set, including the installation system and lifting device. The installation system should consist of square steel guide rods and top and bottom supports, allowing for free adjustment of the flow enhancer's lifting and lowering. The propeller can be dismantled and installed without emptying the pool. The propeller is mounted on a bracket that slides on the guide rod as a single unit, which must be capable of supporting the entire weight of the propeller and all the thrust it generates.
The lifting device should be portable, and the hoist mounting should not be installed on the pool wall or the pool-side working platform. It should be mounted on the top support of the installation system, and should include a lifting hook, lifting chain, and a winch.
Each pump should be supplied with a cable tensioning piece and a cable clip to prevent cable damage caused by fluctuations in the turbulent water flow.
Lifting arms equipped with mounting brackets and lifting devices should be installed. AISI 304 stainless steel material. The lifting chain should be made of AISI 316 stainless steel. Bolts, nuts, washers, rotating operation handles, and anchor bolts should also be supplied as a set. Chemical bolts must be used for the installation of anchor bolts to ensure a firm and durable installation of the flow promoter system; expansion bolts are not permitted.
Duwan Environmental's stainless steel submersible propeller is capable of withstanding the corrosive environment of municipal wastewater. It must be able to propel the flow of wastewater or sludge. Guaranteed Bottom Flow Rate（Apologies, but I need the Chinese content to translate it into American English. Please provide the text you would like translated. 300mm as standard）No less than 0.3m/sThe transmitter should operate continuously under full immersion conditions. It should also be adaptable to both continuous and intermittent operation.(Increased startups per hourTo be achieved 20 times)Operation status after resuming from a long-term shutdown.
Diving at Low SpeedThe pump must operate smoothly without vibration. All rotating parts (including the motor) should undergo dynamic and static balance tests during manufacturing. The pump should be cost-effective for maintenance, highly reliable, and have a long period of trouble-free operation.
Component Material for Submersible Flow Injector
Propeller: Reinforced Polyurethane
Gearbox: Cast Iron DIN1691 GG25 (ASTM A48 35B)
Motor Housing: Cast Iron DIN1691 GG25 (ASTM A48 35B)
Axle: Stainless Steel
Mechanical Sealing: Silicon CarbideSilicon Carbide Fasteners: Stainless Steel AISI 316 Cable Sheath: Chloroprene Rubber
O-ring: Nitrile or Fluorine Rubber; Flow Channel Bracket: Stainless Steel AISI 304
Guideway System: Stainless Steel AISI 304
Upgrade Steel Wire: Stainless Steel AISI 3164
Enhance lifting boom: Stainless Steel AISI304
Chemical Anchor Bolts: Stainless Steel
Surface Corrosion Protection: Two-Component Epoxy Resin Coating, Two Layers of Primers Each Thickness 100μm, coating thickness
Stainless Steel Submersible Flow Propeller Leaves FactoryPlease refer to the following attachments:
1、TwoReplacement parts for normal year operation are listed separately with itemized quotes. Bidders are to note the parts.The quote for spare parts should be at least equal to the total equipment quote. 3%。
2We provided the tools required for the continuous commercial operation of the equipment for two consecutive years, and separately listed them in a detailed inventory.The item is quoted and included in the total bid price. These tools will be delivered simultaneously with the supply item upon the buyer's selection and confirmation. Tools required for two years of commercial operation must be of the same quality standards as this project under the quality defect warranty.The quantity reserved post-confirmation.
3. Diving Propulsion System Assembly Diagram: Detailed technical specifications, component materials, as well as the physical dimensions and space requirements for installation, maintenance, and operation.
4. Basic bolt layout detail drawings and civil engineering load, electrical principle diagrams.
5. Installation, operation, and maintenance manuals for equipment.
6. Equipment Assembly, Installation, and User Instructions.
