Shanghai Douli Power Co.,Ltd

21/11/2025

The third batch of 900kw 10kV Submersible Pump Motors is nearing completion.

01/11/2025

دعم عملائنا في تركيب وتشغيل محركات YRKK ذات الدوار الملفوف.
YRKK-1000-6 بقدرة 6300 كيلوواط، جهد 13.8 كيلوفولت، تردد 60 هرتز، IP55، مع حلقة انزلاقية مدمجة.
تعمل الحلقة الانزلاقية المدمجة على تقليل مخاطر الأسلاك الخارجية وتعزيز مقاومة الغبار، مما يحقق انخفاضًا بنسبة
30٪ في خطر تسرب غبار الكربون.

30/10/2025

With our VHS IP55 TEFC Motors, you get more than just stable torque and speed. Our motors offer outstanding energy efficiency, exceptional durability,and low maintenance needs, ensuring dependable performance even in the most demanding conditions.
We’re here to help you optimize efficiency, minimize downtime, and reduce costs over time.

08/04/2025

IP55 Variable Frequency Vertical Hollow Shaft Motor
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07/04/2025

VHS motor details

03/04/2025

Why Do Motor Bearing Failures Often Occur at the Non-Drive End?

Motor bearings are critical components in industrial equipment, yet failures frequently occur at the non-drive end (NDE). Finding the key reasons can help optimize maintenance and extend bearing life.

1. Lower Mechanical Stress: The NDE typically bears lighter loads than the drive end.
However, reduced stress can mask early signs of wear, leading to unnoticed degradation over time.

2. Axial Current Damage:
In variable frequency drives (VFDs) or high-voltage motors, axial currents induced by electromagnetic fields often target the NDE. Without proper insulation (e.g., insulated bearings or insulated sleeves), current discharge erodes bearing surfaces, causing pitting or fluting.

3. Structural Vulnerabilities:
Non-drive end bearings (often ball bearings) are more sensitive to misalignment or improper lubrication.
Complex motor designs (e.g., three-bearing systems) may prioritize insulation at the NDE due to simpler retrofitting and cost efficiency.
4. Thermal and Lubrication Issues:
Poor heat dissipation or contaminated grease accelerates wear. The NDE’s location may hinder effective lubrication, especially in sealed or maintenance-neglected systems.

Solutions:
Insulated Bearings: Install insulated bearings or sleeves at the NDE to block axial currents.
Regular Diagnostics: Use vibration analysis and infrared thermography to detect early failure signs.
Quality Lubricants: Opt for high-performance greases to reduce friction and contamination risks.
Predictive maintenance.

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29/11/2024

Stainless Steel TC & TD fl**ge for NEMA Motor

Shanghai Douli Power Corp. offers a full range of IEC/NEMA energy efficient general and definite purpose electric motors as well as custom made electric motors.

06/11/2024

How you can judge the cause of motor burning based on its state and delineate responsibility?

Shanghai Douli Power Corp. offers a full range of IEC/NEMA energy efficient general and definite purpose electric motors as well as custom made electric motors.

01/11/2024

Upgrading the frame of a Vertical Hollow Shaft (VHS) motor with an IP55 protection rating can enhance its performance, particularly in terms of heat dissipation and durability.

IP55 VHS hollow shaft motor

31/10/2024

We produce high-end motors

WNM, wn motors, electric motors,chinese high speed trains motor, drive motors