Hogar > 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 !

Últimas noticias

 Optimization Design Service – Enhancing Your Business Efficiency
Optimization Design Service – Enhancing Your Business Efficiency

Time:2023-5-5

Optimization design service is a key component of modern business strategies. It involves the analysis and improvement of business processes, systems, and operations to enhance efficiency, reduce waste, and increase profitability. Optimization design service providers offer a range of solutions, including process improvement, workflow analysis, resource allocation, and technology integration, among others. The goal of optimization design service is to...

 Discover the secrets of torsion spring energy
Discover the secrets of torsion spring energy

Time:2024-3-19

Speaking of torsion springs, you may feel unfamiliar, but they are everywhere in life! This small mechanical component has a lot of energy. Want to know how it works and where the energy comes from? Come with me to unveil its mystery! Torsion spring, what is it? A torsion spring, simply put, is a spring that can "twist". If you...

 Replacing Fire Damper Springs: Ensuring Safe Fire Protection
Replacing Fire Damper Springs: Ensuring Safe Fire Protection

Time:2023-12-1

Fire protection is of utmost importance in any building, ensuring the safety of occupants and minimizing property damage in the event of a fire. One crucial component of fire protection systems is fire dampers, which are designed to prevent the spread of fire and smoke through ventilation ducts. However, over time, the springs in fire dampers may weaken or fail,...

 Introduction to Constant Torque Spring Motors: Functionality, Applications, and Advantages
Introduction to Constant Torque Spring Motors: Functionality, Applications, and Advantages

Time:2023-12-12

Constant torque spring motors are mechanical devices that use a coiled spring to generate a constant torque output throughout their entire range of motion. These motors have a wide range of applications across various industries, thanks to their unique functionality and numerous advantages over traditional motors. In this article, we will explore the functionality, applications, and advantages of constant torque...

 How to choose the most appropriate material for the springs used in your applications?
How to choose the most appropriate material for the springs used in your applications?

Time:2023-6-13

Springs can be manufactured in different materials and surface finish depending on factors such as application or project requirements and operating environment.  While the materials and surface finish are very important to the function of the springs.   Here below are the materials option and its characteristic for your review to make the right decision for your application.   High-carbon...

 Enhancing Performance with High Precision Springs
Enhancing Performance with High Precision Springs

Time:2023-7-17

Introduction In today's fast-paced world, where precision and efficiency are key factors in determining the success of a product or system, high precision springs play a vital role. These small but powerful components are designed to provide consistent force and reliability, enabling devices to perform at their best. From aerospace and automotive industries to medical and electronic devices, high precision...

Product