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

Analysis on the causes of carbon brush fault of generator set

kilde:Qianye præcision tid: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 !

Seneste nyt

 What is the power of High Cycle Torsion Springs in mechanical systems?
What is the power of High Cycle Torsion Springs in mechanical systems?

Time:2023-7-25

Introduction In mechanical systems, the use of springs is vital to ensure efficient and reliable operation. One type of spring that has gained significant attention in recent years is the high cycle torsion spring. With its unique design and impressive capabilities, this type of spring offers numerous advantages in various mechanical applications. This article aims to delve into the power...

 What is the development and application of Constant Force Torsion Spring?
What is the development and application of Constant Force Torsion Spring?

Time:2023-7-25

Introduction Torsion springs are a type of mechanical spring that generate rotational forces or torque. These springs are widely used in various applications, including automotive, aerospace, and industrial machinery. In recent years, there has been a growing demand for torsion springs that provide a constant force over a wide range of deflections. This article aims to discuss the development and...

 Design and Analysis of a Constant Force Spring Reel
Design and Analysis of a Constant Force Spring Reel

Time:2023-6-14

Design and Analysis of a Constant Force Spring Reel Introduction Constant force spring reels are commonly used in various applications such as cable and hose management, and retractable devices. The primary function of a constant force spring reel is to provide a constant force as the spring is unwound. This article discusses the design and analysis of a constant force...

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

Time:2023-6-20

Springs are an essential component in many products, ranging from simple pens to complex machines. They are known for their ability to store energy and release it when needed. However, not all springs are created equal. Depending on the application, different types of springs may be required to meet specific requirements. This is where tailored springs come in. Tailored springs...

 Flat Coil Springs: Innovative Technology for Efficient and Reliable Mechanical Systems
Flat Coil Springs: Innovative Technology for Efficient and Reliable Mechanical Systems

Time:2023-6-21

Flat coil springs have become increasingly popular in recent years due to their innovative technology and their ability to create efficient and reliable mechanical systems. These springs are different from traditional coil springs, as they are flat and are able to perform unique functions that cannot be achieved with traditional coil springs. In this article, we will explore the world...

 Constant Force Spring Reel: A Mechanism for Consistent and Reliable Force Generation
Constant Force Spring Reel: A Mechanism for Consistent and Reliable Force Generation

Time:2023-11-22

In various industries and applications, the need for consistent and reliable force generation is paramount. This requirement is particularly critical in areas such as robotics, aerospace, medical devices, and automotive systems. To meet these demands, engineers have developed a mechanism known as the constant force spring reel. This innovative device ensures a continuous and consistent force output, making it an...

Product