Wall-Climbing Pump QJB-W7.5 Reserved Hole Size
Submersible Wall Penetrating Pump Installation Dimensions
Non-Ferrous Sludge Recirculation Pump Installation Dimensions
Duwan Environmental Sludge Through-the-Wall Recirculation Pump Design
1. Impeller
Propeller impellers should be capable of handling conventional wastewater. The propeller impeller is designed in a hydraulically balanced, non-entangled, and self-cleaning form. The impeller should be meticulously machined and surface treated to transmit the motor's output power efficiently. The impeller features three blades, all of the same form and evenly spaced. The blades and hub must be made of stainless steel AISI 316. The propeller impeller is fixed at the end of the shaft with a single key bolt, sealed with a protective cap, and a locking washer system should be used. The propeller impeller should pass dynamic balance testing.
Gearbox
The mixed-liquid recirculation pump is powered by a high-performance planetary gear box. The gear box housing and the wall-piercing pump housing should be integrated into one, forming a streamlined cone shape. The surface should transition smoothly with the hub and motor housing to ensure high stability and excellent hydraulic characteristics, thereby enhancing the overall efficiency of the wall-piercing pump. The gear box should be equipped with high-precision, high-efficiency...Single-pole planet gears with high efficiency and low load, the gear teeth should be made of high-wear-resistant alloy steel. The gear box should be filled with oil for lubrication and cooling, as well as to minimize the impact of leakage. The gear box should be manufactured by an internationally renowned transmission manufacturer. The design service life should not be less than 100,000 hours.
3. Axle
The motor shaft and propeller shaft are connected via a gearbox. The shafts are made of wear-resistant stainless steel, capable of withstanding...
All axial and radial loads. The propeller shaft is fully protected by mechanical seals and radial seals, isolated from the medium.
4. Bearings
The shaft of the mixed-liquid recirculation pump motor should rotate on two ball bearings, while the propeller shaft is supported by two cone roller bearings.
All bearings are made with long-termHigh-quality, grease-lubricated, maintenance-free bearings that can withstand axial and radial loads. The bearing lifespan should exceed 100,000 hours.
5. Mechanical Sealing
Utilizing two high-quality mechanical seal systems with independent upper and lower dual configurations, capable of rotating clockwise or counterclockwise without causing any otherThe mechanical seals are all made of tungsten carbide/tungsten carbide or silicon carbide/silicon carbide, with a medium pH range of 6 to 10. The mechanical seals should be maintenance-free, isolated from the lubricant and the fluid being conveyed, capable of withstanding thermal shock, and exhibit good emergency operation characteristics.
Two mechanical seals should be separated by an oil chamber, which is filled with paraffin oil that meets the hygienic standards. The paraffin oil is used for lubricating and cooling the mechanical seals, and also serves as a transmission medium and buffer between the motor chamber, providing additional protection measures. Duwan Environmental's recirculation pump ensures that the mechanical seals have a normal service life of not less than 25,000 hours. General-purpose sealing products should be used for the mechanical seals, with high-quality standards.
6. Electric Motor
The motor should be a squirrel-cage submersible motor, 3-phase, 380V, 50Hz, with a protection rating of IP68 and an insulation grade of F. The motor can be started 10 times per hour and is capable of connecting to a pump for temperature transfer.RoutinePlease provide the Chinese content that needs to be translated. The medium operates at 40°C, with the average temperature rise of the stator winding not exceeding 80°C. The stator should be thermally pressed into the stator chamber and maintain an appropriate gap with the rotor. The direct start current should not exceed 6 times the rated current. Submersible motors and pumps must be manufactured by the same manufacturer.
7. Cables and Cable Seals
The motor should be equipped with a submersible cable, which should be a single cable including both control and power cores. The cable should be equipped with a separate and reliable
The import of cables. The cable dimensions should comply with IEC standards and provide sufficient length to connect to junction boxes or on-site control cabinets without the need for splicing. The cable connection to the junction room should be sealed with reusable double-layer compression rubber sleeves; it cannot be sealed using epoxy, silicone resin, or other secondary sealing systems. Cable replacement should be ensured, with the cable exit being axially aligned and tightly affixed to the outer surface of the motor housing. The cable should be secured using cable clamps and tensioned steel cables to prevent movement due to water flow impact and to avoid snagging during lifting.
8. Mixed Liquid Recirculation Pump Protection System
Mixed-liquid recirculation pumps should be equipped with a protection system to indicate issues such as winding, overload, failure, and leakage.
Alerts should be issued before severe damage occurs to the motor or main shaft.
9. Motor Overload Protection:
Each winding of the motor is protected by a PTC temperature sensor, with the three sensors connected in series. These sensors are all
The action should occur at 125°C. All protective signals are converted separately into passive contacts and sent out through a combined module.
Motor腔leak protection and mechanical seal leak protection
A sensor for detecting liquid leaks is provided in the stator chamber. It outputs a signal upon sealing leaks to prevent water from entering.
Motor cavity.
DuAnQJB-W7.5 Recirculating PumpPrimary Material
Propeller: Stainless Steel AISI 316Ti
Gearbox:Stainless Steel
Motor Housing: Stainless Steel
Axle Stainless Steel EN 16NiCr4
Mechanical Seals: Silicon Carbide/Silicon Carbide
Fasteners: Stainless Steel AISI 316
Cable Jacket: Chlorinated Butyl Rubber
O-Ring Nitrile rubber or Fluorinated rubber
Return Pump Bracket: Stainless Steel AISI 304
Drainage Loop: Stainless Steel AISI 304
Connect Flanges: Stainless Steel AISI 304
Guideway System: Stainless Steel AISI 304
Enhanced Chain: Stainless Steel AISI 316
Each through-the-wall recirculating pump is equipped with a control and protection signal line, featuring overloading, phase loss, short-circuit, leakage, and over-temperature protection functions, as well as corresponding signal indications, ensuring the reliable operation of the unit.
