In the process of using the diesel engine fire pump, if the pump shaft breaks, many people will blame the product quality problem. In fact, this is not correct. The cause of the diesel engine fire pump shaft break is not only caused by product quality. The irregularity of the operation is the main problem.
- The precision of the pump shaft casting is not enough, which leads to the fracture of the pump shaft of the fire pump;
- The heat treatment of the diesel engine fire pump shaft is not enough, and the pump shaft breakage is prone to occur. It is recommended to perform a heat treatment;
- Some pump products, such as pump shafts of various fire pump products, need to be welded. It is also one of the reasons for the fracture at the weld due to the failure of the welding process.
- When using various sewage pumps, the impeller is stuck due to the suction of the hard objects into the pump. The cracks may occur due to the thinness of the individual small pump shafts;
- Because the diesel engine fire pump is placed in the environment for a long time, there will be some corrosion phenomenon, and the liquid delivered is extremely corrosive. If the pump shaft material of the fire pump you purchased at this time is not corrosion-resistant. The material of the pump shaft will break due to corrosion.
In addition, after using for a long period, some pump bodies or impellers of diesel engine fire pumps will have different holes and holes. This phenomenon is called cavitation. This phenomenon is normal and we cannot completely prevent it. , but can effectively extend his period of time.
- Reduce the installation height of the pump;
- Reduce the resistance of the suction pipeline;
- Reduce the temperature of the transport liquid to reduce the vaporization pressure;
- Avoid valve throttling on the inlet pipe;
- Once cavitation occurs, reduce the flow and slow down.