What is Oil Mist Protection System for Diesel Generators

 
Diesel generators, as common backup power devices, play a crucial role in various applications. To ensure the safe and stable operation of diesel generators, the oil mist protection system has emerged as a key protective device. This article will delve into the working principle, advantages, disadvantages, and troubleshooting of the oil mist protection system, aiming to provide reference and guidance for users and maintenance personnel.
 

Working Principle and Function of the Oil Mist Protection System

 
The core component of the oil mist protection system is the oil mist detector, which primarily monitors the working condition of the main components of diesel generators—crankshaft and cylinders. It continuously extracts oil and gas from the crankcase through a sampling pipe and sends it to a concentration measuring device for accurate measurement. When the oil mist concentration exceeds the set value, the electronic identification device will issue an alarm and shut down, indicating the fault location for inspection by maintenance personnel. The rapid response and sensitivity of this protection device provide critical protection for the safe operation of diesel generators.
 

Advantages and Disadvantages of the Oil Mist Protection System

 
The oil mist protection system in diesel generators has important safety features, but it also has its ups and downs. Knowing these can help us understand how well it keeps the engine safe.
 
1. Advantages:
 

• Rapid Response: The oil mist protection system can quickly detect abnormal oil mist concentrations and take timely protective measures, effectively preventing serious accidents caused by engine component failures.
• High Sensitivity: The system has high sensitivity and can detect minor changes in oil mist concentrations, ensuring timely monitoring of engine operating conditions.
• Automatic Shutdown: Once an abnormal oil mist concentration is detected, the system will automatically shut down, effectively avoiding further damage to engine components.

 
2. Disadvantages:
 

• Low Reliability: Due to external environmental factors or system-related reasons, the reliability of the oil mist protection system is relatively low, leading to false alarms or misoperations, which affect the normal operation of diesel generators.
• High Maintenance Cost: The electronic components in the system are affected by harsh environments such as high temperatures and vibrations, making them prone to aging and failure, requiring regular maintenance and replacement, thus increasing operating costs and maintenance difficulty.

 

Troubleshooting of the Oil Mist Protection System

 
Troubleshooting the oil mist protection system involves identifying and resolving issues that may arise during its operation. This process is crucial for maintaining the system's effectiveness in safeguarding diesel generators.
 

• Electronic Board Failure: When all indicator lights of the oil mist detector are extinguished, it may indicate electronic board failure. This can be determined by replacing the electronic board with one from another unit and promptly repairing or replacing it.
• Presence of Water in Lubricating Oil: Excessive water content in lubricating oil may cause false alarms and shutdowns of the system. It is necessary to check for leaks in the lubricating oil cooler and repair them promptly. Consider installing a water detection device to increase the awareness of operating personnel and reduce the frequency of shutdowns.

 
The oil mist protection system, as a crucial safety device for diesel generators, plays an irreplaceable role in ensuring their safe operation. Despite some disadvantages, regular maintenance and enhanced monitoring can reduce the failure rate and false alarm rate, ensuring the stable operation of generators.