The DE7000 and DE9000 are high-performance carbon brushes specifically designed for traction motors of railway locomotives. They are mainly compatible with traction motors of diesel/electric locomotives manufactured by renowned brands such as EMD and GE, and serve as one of the core components in the electric drive system of locomotives.
Core Features
Material and Structure
These carbon brushes adopt high-purity graphite/silver powder-filled material impregnated with resin, boasting excellent electrical conductivity and a low friction coefficient. Certain models (e.g., AC137+DE7000/DE9000) feature a three-piece structure bonded by elastic silicone rubber, which effectively prevents wire detachment and cracking.
Application Scenarios
Exclusively engineered for traction motors of railway locomotives (e.g., EMD models 40025029 and 9578681), they can also be applied to motors of heavy-duty equipment in industries like oilfields. However, their primary application lies in the power transmission system of locomotives.
Specification Parameters
The common dimensions are 15.8×50.8×53mm (or 5.2×50.6×56mm, etc.). Some models are equipped with 15-degree tapered holes and silver powder wires, ensuring perfect compatibility with the mounting interfaces of locomotive motors.
Performance Advantages
- Superior Durability: Capable of withstanding the high-load and high-frequency operating conditions of locomotives, some products are rated to have a service life of over 100,000 kilometers.
- Exceptional Stability: Maintains stable electrical contact even under vibration and high-temperature environments, reducing the risk of motor malfunctions.
- Maintenance-friendly: The three-piece design facilitates easy replacement, and effectively avoids issues such as wire terminal loosening and brush breakage.
- As a "small yet critical" component in the traction system of railway locomotives, it directly impacts the power transmission efficiency and service life of the motor.
