Audited Supplier
The reliability of submersible motor mainly depends on the advanced design and manufacturing process of submersible motor, YQGN series of submersible motor has the following main technical characteristics:
a ,Because this series of submersible motor is dry structure, the high power submersible motor adopts three tandem mechanical sealing and advanced cable joint sealing technology.
b, this series of low-voltage submersible motor loose embedded winding selection of polyamide - imide enamelled round copper wire, low-voltage submersible motor forming winding selection of imide composite film wrapped around the junction of the electromagnetic wire, high-pressure submersible motor forming winding selection of imide composite film wrapped around the junction or mica composite material wrapped around the electromagnetic wire manufacturing. The winding adopts special insulation specification of thickening insulation, and the winding connection adopts special sealing joint, which has reliable waterproof performance.
c. This series of submersible motor uses special submersible rubber flexible cable with good water-blocking performance and high tensile mechanical strength. High-voltage submersible motor cable appearance using semiconductor materials to equalise or improve the electromagnetic field, so the high-voltage submersible motor has good grounding performance, the line end may not be phase-to-phase withstand voltage test.
d, this series of YQGN740 and above low-voltage submersible motor and YQGN590 and above high-voltage submersible motor rotor shaft are used stainless steel 3Gr13 based on the material of the spokes of the welded structure, improve the mechanical strength of the rotor shaft, thus enhancing the reliability of the submersible motor operation.
e. As the company has exquisite rotor casting aluminium technology and various aluminium casting moulds. In order to improve the technical performance of submersible motor and the reliability of submersible pump operation, this series of low-voltage submersible motor generally adopts the cast aluminium rotor structure, high-pressure submersible motor generally adopts the copper bar rotor structure, and after strict dynamic balance test and motor overspeed test. f. High-power submersible motor adopts special structure of bearing lubrication and cooling system. The upper and lower bearings of the submersible motor generally have oil storage and refuelling devices, and are lubricated by high-quality grease with stable performance and long storage time; the thrust bearings are lubricated by oil with good temperature resistance, heat transfer and insulation properties, and the temperature rise of the thrust bearings is generally no more than 40K during operation.
g ,Set up a variety of automatic protection devices, such as internal leakage of the junction box, water inside the motor, overheating of the windings, water in the oil chamber, overheating of the bearings, as well as automatic monitoring of the insulation resistance of the motor and so on.
Combined with more than 70 years of experience in designing and manufacturing all kinds of high and low voltage motors, our company has all kinds of motor manufacturing tooling and moulds, and through absorbing advanced technology and technological innovation both at home and abroad, we have improved the design level of submersible motors, and accumulated rich experience in manufacturing and management, which ensures the quality of submersible motors. After experiments and years of use by users, this series of products have been proved to be at or close to the international advanced level in terms of both technical performance and economic performance, and have been mass produced.
Standard seaworthy package for export
Plywood package or wooden fumigation package
Suitable for long distance transportation by sea
Located in Changsha, central China's Hunan province, Changli Electric Co., Ltd., a subsidiary of Changli Group, which was formally known as Changsha Motor Factory founded in 1946, is a leading electric motor manufacturer among Top 10 industrial electric motor manufacturers in China. With over 70 years' production experience and research and development capabilities, we can produce a wide range of motors. After years' development, we have several branches, offices and marketing centers around the country.
With an investment of 1094 million yuan, the company covers an area of 400mu (about 270, 000m2), has over 600 sets of precision production equipment, with annual production capacity of 8, 000 MW.
At present, we have over 350 employees, in which engineers and technicians accounting for 18%. With a strong technical research and development team and over 70 years' manufacturing experience, we can produce various kinds of low voltage motors, medium voltage motors and high voltage motors.
Our testing center is Hunan Medium and Small Sized Motors Quality Supervision Station, an authorized test station of China National Quality Inspection Center, is responsible for the quality supervision and sampling inspection of motor products of various motor manufacturers in Central and Southern China. We can test 40 series of high and low voltage motors.
Our products include standard motors, synchronous/asynchronous motors, high efficiency motors, premium efficiency motors, explosion proof motors, special motors, variable frequency speed regulation motors, ultra-high speed motors, submersible motors, wound rotor slip ring motors, permanent magnet motors, large-sized vertical circulating pump motors, etc.
Wide power range available
Excellent starting performance
Available to all industry segments and applications in global supply
Highest reliability to minimize operation cost from downtime
High flexibility with customizable design
Support to witness FAT on site/online
In-process Inspection/ Quality Control
All the measuring apparatus and instruments are calibrated each year.
Quality control for each item
| Part | Inspection item |
| Coil | 1. Physical and chemical tests for raw materials |
| 2. Coil winding process inspection | |
| 3. Winding dimension inspection | |
| Iron Core | 1. Physical and chemical test report for silicon steel sheet material |
| 2. Lamination burrs and paint film inspection | |
| 3. Dimensional inspection of laminated steel sheet | |
| Frame | 1.Cold welding parts conformity certificate |
| 2. Finish machining inspection | |
| Rotor | 1. Rotor core lamination inspection |
| 2. Conducting bar welding | |
| 3. Check the material, appearance, conductivity and size of the conducting bar end ring | |
| 4. Check the fastening of the conducting bars in the slots | |
| 5. Dimensional check, including iron core outer diameter | |
| 6. Dynamic balance correction | |
| Shaft | 1. Raw material , annealing check |
| 2 Finish machining check | |
| Stator | 1. Iron core compactness check |
| 2. Check iron core length and section length | |
| 3 Inserting winding check | |
| 4. Iron consumption check | |
| Assembly | 1.Plain bearing size and surface quality check |
| 2. Check the size of the air gap, the coincidence of the axial centerline of the stator and rotor core, the gap of inner fan and windshield | |
| 3 Cleaning check inside the motor | |
| 4 Shaft center height and installation size check | |
| Test | 1. Routine test |
| 2. Type test |
Each motor must be tested before leaving the factory. After the motor is qualified, the motor can be shipped out. Each motor will have a test report.
| Routine test items Winding three-phase DC resistance Winding insulation resistance to ground Winding withstand voltage test No-load current No-load power No-load loss Three-phase no-load current imbalance Locked rotor current Locked rotor torque Maximum torque Rotation direction Vibration: horizontal, vertical, axial Noise | Type test items Full load input power Full load current Stator winding loss Rotor winding loss Iron loss Mechanical loss Other losses Full-load slip ratio Stator winding temperature rise Bearing temperature Thermal winding insulation resistance Overload test Full-load power factor Efficiency |
Standard warranty: 12 months after commissioning, or 18 months after delivery, whichever comes first.
If you would like to extend the warranty period, please contact us for details.
