Huis > Blog > Analysis on the causes of carbon brush fault of generator set

Analysis on the causes of carbon brush fault of generator set

source:Qianye Precision time:2022-9-15

In recent years, several safety briefings have successively reported shutdown accidents caused by carbon brush or rotor collector ring failure of large generator units, resulting in great economic losses to the enterprise.Carbon brushes are motor brushes. Improper maintenance and use of the carbon brush of the generator set during operation will cause accident load reduction or even shutdown.

       Factors leading to carbon brush fault

     Electromagnetic factors : when reactive or excitation current is adjusted, the spark of carbon brush has obvious change. When the exciter commutates, the contact between the carbon brush and the commutator is not good, and the contact resistance is too large ; the uneven thickness of the oxide film of the rectifier or slip ring causes the unbalanced distribution of carbon brush current ; or sudden change of load and sudden short circuit lead to abnormal voltage distribution between commutators ; unit overload and imbalance ; carbon brush selection is unreasonable, carbon brush spacing is not equal ; carbon brush quality issues, etc.

Mechanical factors : commutator center is not correct, rotor imbalance ; large vibration of the unit ; insulation bulge between commutators or commutators bulge ; carbon brush contact surface grinding is not smooth, or commutator surface roughness caused by poor contact ; the commutator surface is not clean ; the air gap under each reversing pole is unequal ; spring pressure on carbon brush is uneven or unsuitable ; carbon brush in the brush grip too loose and jump, or too tight carbon brush in the brush grip stuck, etc. Reduced operating speed or improved vibration will reduce sparks.

Chemical factors : When the unit is running in corrosive gas, or the unit is running in lack of oxygen, the copper oxide film formed naturally on the surface of the contact surface between the commutator and the carbon brush is destroyed, and the commutation of the formed approximate linear resistance does not exist, and the spark of the commutator is intensified in the process of forming the oxide film on the contact surface. The commutator ( or slip ring ) is corroded by acid gas or oil. Carbon brushes and commutators are contaminated.

The pressure of the carbon brush spring should conform to the manufacturer ‘ s regulations, so that the pressure of the carbon brush is uniform. The carbon brush spring produced by Qianye maintains the same pressure with the rectifier regardless of the length of the carbon brush. Larger rectifiers can be used to reduce sparks and electromagnetic interference.

     Shenzhen Qianye Precision Metal Co., Ltd. is a manufacturer specialized in providing high-precision springs. The company integrates product R & D, production, sales and services, and has engineering and management personnel with various technical skills and rich experience. Has successfully passed ISO9001, ISO14001 and TS16949 professional qualification certification. We sincerely welcome new and old customers and friends from all walks of life to visit the company to guide, negotiate business cooperation, Qianye Precision will sincerely serve you !

Latest News

 Tailored Springs: Customized Solutions for Your Unique Needs
Tailored Springs: Customized Solutions for Your Unique Needs

Time:2023-6-15

Springs are an essential part of many mechanical systems, providing support, cushioning, and movement. However, not all springs are created equal, and there is often a need for custom solutions that meet specific requirements. That's where Tailored Springs comes in - a company that specializes in creating springs that are tailored to your unique needs. Tailored Springs has been in...

 Congratulations on the return of Shenzhou 13 spacecraft
Congratulations on the return of Shenzhou 13 spacecraft

Time:2022-9-14

At about 10 am on the 16th, the "Shenzhou 13" manned spacecraft landed smoothly, and the three astronauts who had been on a business trip for half a year also returned safely, and the hearts of many people also fell to the ground. At the same time, Yang Liwei's voice that appeared in the live broadcast room also made many...

 Enhance Your Curtains with High-Quality Spring Wire Accessories
Enhance Your Curtains with High-Quality Spring Wire Accessories

Time:2023-8-21

Curtains play a vital role in enhancing the aesthetic appeal of any room and providing privacy and comfort. However, to make the most of your curtains, it is essential to invest in high-quality spring wire accessories. These accessories not only ensure smooth operation but also add a touch of sophistication to your curtains. In this article, we will explore the...

 Exploring the Versatility and Benefits of Flat Coil Springs
Exploring the Versatility and Benefits of Flat Coil Springs

Time:2023-6-20

Flat coil springs are an integral component in the manufacturing industry, used for a variety of applications such as automotive, aerospace, medical equipment, and even everyday household appliances. These types of springs come in different materials, sizes, and shapes, and are incredibly versatile in their use. One of the most significant benefits of flat coil springs is their ability to...

 Veermotor met constant koppel
Veermotor met constant koppel

Time:2022-9-14

A constant torque spring motor is a strip of prestressed spring material that forms a coil and is stored on a small storage drum. The free end is then pinned and rewound onto the larger output drum; this is the "winding" part of the constant torque spring cycle. When the output drum is released, the spring will return to the...

 The Art of the Spiral Torsion Spring: A Guide to Design and Functionality
The Art of the Spiral Torsion Spring: A Guide to Design and Functionality

Time:2023-6-10

The spiral torsion spring is an essential component in various mechanical systems, from automotive engines to household appliances. It is a type of spring that works by exerting torque when twisted around its axis, making it an ideal choice for applications that require rotational force. Designing a spiral torsion spring is a complex process that requires a thorough understanding of...

Product