Duwan Environmental QJB-W18.5 Sludge Recirculation Pump User Manual

18.5 kW motor power

304 Stainless Steel Material

Through-the-wall pipe, door pull, guide rod, lifting device, hand winch, stainless steel hoist chain

Rod dimensions: 100mm x 100mm x 4mm

Wall Penetration Pipe, Diameter 600mm

Jiangsu Du'an Environmental ProtectionQJB-W18.5 SludgeRecirculating Pump Design

1 Propeller

Propeller impellers can handle conventional wastewater. They are designed in a hydraulically balanced, non-entangling, and self-cleaning form. Propeller impellers should be meticulously machined and surface treated to efficiently transmit the motor's output power. The impeller has three blades. All blades are of the same design, evenly spaced. The blades and the wheel hub must be made of stainless steel material. AISI316The propeller blade wheel is secured to the shaft end with a single key bolt, sealed with a protective cap, and a locking washer system should be used. The propeller blade wheel must pass dynamic balance testing.

2 Gearbox

Mixed-Phase Recirculation Pump Achieves High EfficiencyPerformanceThe planetary gearbox transmission. The gearbox housing and the wall-piercing pump housing should be integrated as 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 gearbox should be equipped with high-precision, high-UtilizeSingle 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, and to minimize the impact of leakage. The gear box should be manufactured by an internationally renowned transmission specialist manufacturer. The design service life should not be less than 100000 Hour.

3 Axle

The motor shaft and propeller shaft are connected through a gearbox. The shafts are made of wear-resistant stainless steel, and the propeller shaft and motor shaft can withstand

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 of high quality.Long-termHigh-quality, maintenance-free bearings with a lubricious grease coating can withstand both axial and radial loads. The bearing lifespan should be100,000 Overtime of 10 hours or more.

5Mechanical Seal

Our company introduces a high-quality mechanical seal system with two independent, double-acting arrangements, which can rotate clockwise or counterclockwise without causing...OtherConsequences. Mechanical seals are all made of tungsten carbide./Tungsten Carbide or Silicon Carbide/Silicon carbide, with a pH range ofpH=6～10The mechanical seal should be maintenance-free, isolated from the lubricant and the fluid being conveyed, capable of withstanding thermal shock, and feature excellent emergency operation characteristics.

There should be an oil chamber between the two mechanical seals, filled with paraffin oil that meets the hygiene standards. This oil lubricates and cools the mechanical seals, serves as a medium for transmission and as a buffer between the motor cavity, and acts as an additional protective measure.Duwan Environmental Recirculation PumpEnsure the normal service life of mechanical seals is not less thanTranslation: None provided (as there is no Chinese content to translate).25,000 Hour. The mechanical seal should use a general seal product.Superior quality.

6Motor

The motor should be a squirrel-cage submersible motor.3 Please provide the Chinese content that needs to be translated into American English.380V、50HZNo Chinese content provided.IP68Insulation GradeFElectric motors can start every hour.10 Please connect the pump to the temperature.RoutinePlease provide the Chinese content you would like translated into American English. 40°C The medium has been selected, and the average temperature rise of the stator winding does not exceed80°CThe stator should be hot-pressed into the stator chamber and maintain an appropriate gap with the rotor. The direct start current should not exceed...6 Rated current must be doubled. 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 is a single cable including both control and power cores. The cable should be equipped with a separate and reliable one.

Import of cables. The cable dimensions should comply with IEC Standardized and with sufficient length to connect to junction boxes or local control cabinets without splicing. The cable connection to the junction room should be sealed with reusable double-channel compression rubber sleeves, and not sealed with epoxy, silicone resin, or other secondary sealing systems. Ensure cable replacement, with the cable outlet being axially aligned and tightly positioned in the same direction as the external surface of the motor housing. Simultaneously, secure the cable with cable clamps and tensioned steel cables to prevent movement due to water impact and to avoid being snagged 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 entanglement, overload, failure, and leakage.

Alerts should be issued before severe damage occurs to the motor or main shaft.

9 Motor Overload Protection:

Each motor winding is meticulously crafted. PTC Type temperature sensor protection: three sensors should be connected in series, with all sensors equipped with protection.

Please provide the Chinese content to be translated. 125℃ action. All protective signals are transmitted.1 The combined modules are converted into passive contacts for output.

10Electrical motor cavity leakage protection and mechanical seal leakage protection

A sensor for detecting liquid leaks is provided in the stator chamber. It outputs a signal upon sealing a leak to prevent water from entering the motor cavity.

Duwan Environmental ProtectionQJB-W18.5Sludge Recirculation PumpAfter-Sales Service Promise:

1Responsible for providing free guidance on installation, debugging, and ensuring the equipment operates smoothly until it is fully functional.;

2On-site, we offer free training services to users on basic operations and daily maintenance.;

3Starting from the date of equipment acceptance, warranty services will be provided for the equipment of this project in accordance with the original manufacturer's warranty regulations.;

4Complimentary upgrade from standard factory warranty service to on-site warranty service;

5Complimentary upgrade from standard manufacturer's warranty to lifetime warranty; for equipment outside the warranty period, only charge for faulty parts at cost, no labor fees.;

6Service response time4-8Hour, during legal working hours, East China region users4Responded within the hour to the fault site, other usersNextA workday arrives at the fault site;