Design and Application of Reducing Device for Abnormal Speed Fluctuation of Electric Feed Water Pump
In response to the issue of abnormal speed fluctuations during the operation of the electric water supply pump,on-site investigation and cause analysis were conducted to identify the factors that affected the operation.It was found that the exhaust of the working oil pipeline was insufficient,causing a large number of bubbles to enter the scoop tube of the hydraulic coupling for work,affecting the normal operation of the scoop tube of the hydraulic coupling.This is the main cause of abnormal speed fluctuations in the electric water supply pump,and even causing a low liquid level alarm fault in the steam drum.For this purpose,a set of exhaust device was designed and installed on the oil inlet pipe of the electric feed pump,including an oil gas separation unit and an exhaust unit.Then,the oil gas separation was achieved through mechanical principles,and the gas was smoothly discharged from the exhaust valve of the exhaust unit,while the oil returned to the feed pump component through a specially designed pipeline.The test results showed that after the installation of the exhaust device,the fluctua-tion speed of the electric feed pump was stable within the operating range of 50％-70％load,maintaining within 200 r/min.Thus,the fault of abnormal fluctuation speed as well as low liquid level alarm caused by insufficient exhaust of the working oil pipeline was eliminated.
electric feed water pumpabnormal fluctuationsrotate speedexhaust device
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维普
