Nanjing submersible thruster manufacturer QJB2.2/4-1400/2-85/P submersible thruster

QJB2.2/4-1400/2-85/P submersible thrusterIt's my company1988Developed independently based on the introduction of German submersible motor production technology in the year, the motor power has now evolved from0.85~15kwThe rotational speed is from42~980change/Divide, impeller diameter260~2500mmThe mass production of the series of products has broken the situation in China where submersible mixers rely entirely on imports.Nanjing Du'an Water Treatment is still the only recommended unit for the localization of the first batch of sewage treatment equipment in this series of products and the drafting unit for the submersible mixer industry standard. This is another solid step taken by Nanjing Du'an Water Treatment to achieve the goal of domestication of water treatment equipment in China, following the submersible sewage pump product. Since its launch on the market, this product has been put into operation in dozens of sewage treatment plants across the country and has received unanimous praise from users.

1．Equipment name agitators

2．Model specificationsQJB4/4-2500/2-42/P

3. Main technical parameters

4. Purpose

Used for low-speed stirring in biological treatment tanks to ensure thorough mixing of sludge and water without generating oxygenation.

5Technical performance

5.1 The submersible mixer can rotate and balance freely, ensuring no jamming, stagnation, vibration or other phenomena;

5.2 Conduct a sealing pressure test on the submersible mixer before leaving the factory,The experimental pressure is3kg/m²There was no leakage for 5 minutes;

5.3 The submersible mixer adopts a dual mechanical seal structure and a lip seal structure, and the mechanical seal ensures reliable operation within 8000 hours without the need for replacement;

5.4 The cable leading out of the submersible mixer adoptsGB5013.2centreYZWType rubber sheathed flexible cable or other cables with the same performance, standard configuration length per unit10mThe cable sealing head adopts special vulcanization treatment,To prevent cable sheath damage and water leakage to the motor;

5.5 The surface of the submersible mixer is sprayed with anti-corrosion paint, which is bright and free of stains,,Collisions, cracks, and other phenomena; The primer for the motor housing isPVCEpoxy resin with chlorinated rubber coating on the surface;

5.6 The submersible mixer oil chamber is equipped with a sealed leakage protection device;

5.7 Double colored wire (yellow) in the cable leading out of the submersible mixer/Green is designated as the grounding wire, and the connection is reliable. The grounding sign is obvious and not easily erased during the service life;

5.8 The submersible mixer blade and rotor undergo dynamic balance testing, with a balance accuracy ofG6.3；

5.9 The underwater mixer can operate horizontally120Rotate within a range of degrees and adjust the thrust angle arbitrarily.

6. Service life

The average operating time of the submersible mixer before the first failure under specified conditions shall not be less than10000Hours, the service life of the whole machine shall not be less than15Year.

7. Structural design

7.1Junction box

The junction box is completely sealed and isolated from the surrounding liquid and motor parts; Cooling: The motor stator is cooled by the surrounding liquid.

7.2 Gears

Adopting planetary gear transmission to reduce impeller speed.

7.3blade

The blades are double banana shaped and cast with aluminum alloy, effectively preventing the problem of blade fracture; The inlet edge of the blade is bent backwards and has permanent automatic cleaning performance; Tighten it onto the shaft with a locking nut, making it easy to disassemble and replace during lifting and maintenance.

7.4 Motor

Adopting a fully submerged squirrel cage induction motor, the insulation level of the submersible motor winding isFGrade, protection levelIP68The maximum speed per minute shall not exceed1500Turn around. The motor can operate continuously and start at least every hour12Without causing any harmful effects.

7.5 Oil chamber

Lubricate and cool the sealing device, bearing seat and gearbox between the motor and liquid. The oil chamber plays a role in shock absorption and noise reduction. If necessary, an airbag device can be embedded to reduce and lower the pressure rise in the oil chamber.

7.6 Bearings

The motor shaft is supported by two bearings, which are double row ball bearings; And the main bearing is a double row spherical roller bearing; The impeller shaft is supported by a double row angular contact ball bearing and a cylindrical roller bearing;

The operating life of the agitator bearing is greater than60000Hour.

7.7 Shaft seal

The mixer consists of two mechanical seals and one lip seal. Sealing device material: tungsten carbide--Tungsten carbide.

7.8 mechanical seal

Each wheel axle is equipped with a series connected double-layer independent rotating shaft mechanical seal system, and the sealing device operates inside a fuel tank. Mechanical seal design life is greater than25000Hour.

7.9monitoring system

There are two thermal switches installed in the stator winding, which operate at 125 ℃Action: Under normal circumstances, the temperature of the motor should not exceed80℃.

7.10control system

The control box can achieve self-protection of equipment, with overheat, overcurrent, and leakage protection functions, and can be reservedPLCInterface.

8Materials

casingGG25Cast iron

impeller Composite polyurethane ester

main shaft stainless steel

mechanical seal tungsten carbide--tungsten carbide

Guide rod stainless steel

Lifting bracket stainless steel

Lift the steel cable stainless steel

Static sealing material nbr

fastener stainless steelASTM321

9. Scope of supporting facilities

Fully assembled underwater thruster:

※ Submersible motor

※ Complete set of lifting device, guide rod, bracket, steel wire rope, etc

※10Underwater cables, cable clamps, and junction boxes

※ All connecting accessories and anchor bolts

※ Control box