Crack in the crankshaft of the Filoua high-pressure coal slurry pump
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What causes the crankshaft of the Filoua high-pressure slurry pump to break?
Caused by torsional vibration resulting from uneven load distribution； It is caused by substandard manufacturing quality.
The working medium in high-pressure coal slurry pumps is flexible; the only issue is related to the mass of the shaft, and obvious vibrations and abnormal noises occur before other problems arise.
I heard about it for the first time; it’s probably a quality issue.
A three-plunger diaphragm pump can generate an unbalanced recoil force when one or two cylinders are not functioning properly (due to check valve issues), which exerts a significant impact on the crankshaft and can cause damage to it.
OP: Are there any photos? Sharing it.
Find Filouva and show it to them; it seems the quality issue is quite serious
The crankshaft of a diaphragm pump itself is subject to certain alternating stresses; therefore, high standards are required in its manufacturing, thorough inspections are carried out, and quality issues are rare. It is necessary to carefully check for any additional stresses, such as the clearance between various components, pipeline valves, and whether the system operates under overload conditions for extended periods of time. It is possible to conduct inspection and analysis of the fracture to make a rough prediction.