What are the functions and purposes of barring the engine?
1 Answers
The main functions and purposes of barring the engine are to inspect the operational condition of the vehicle, ensuring its safety and service life. Below are detailed explanations regarding barring the engine: 1. Purpose of barring the engine before starting the machine pump: By barring the engine, check whether it rotates smoothly without any jamming or abnormal internal noises, preventing damage to the machine pump during startup or motor burnout due to excessive current. For some large units, it also serves to warm up and lubricate before starting, preventing localized overheating between the rotor and the body after startup, which could lead to thermal deformation. 2. Purpose of barring the engine after shutdown: For units that have just been shut down, barring is performed to prevent thermal deformation, typically after a short cooling period. For long-term shutdown units, regular barring is necessary to prevent shaft bending deformation or jamming of the machine pump rotor due to the transport of highly viscous media by the equipment. Generally, the engine is barred 540 degrees each time. 3. Barring procedure: First, the oil circuit should be cut off, and the start signal cable disconnected. Then, open the indicator valve of each cylinder to blow out any moisture, oil, or impurities inside the piston. After confirming that the diesel engine is in good condition, it can be started. Before starting the diesel engine, it is essential to inspect the oil circuit, water circuit, air circuit, and electrical circuit related to the diesel engine. If no issues are found, the diesel engine can be started.
