【Q&A Question 014】2018.01.14
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【Q&A Question 014】January 14, 2018: What are the reasons for excessive pump power consumption? The traffic is too high ； The outlet pressure is too high ； The liquid temperature is low or its viscosity is very high ； Mechanical failures, such as misalignment of the two shafts, shaft bending, and wear of the wear rings. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Due to the limits on the number of posts in the “One Question per Day” section, “One Image per Day” has been moved to the registered devices section; you can access it through the directory I posted. Click me to access liuquan1100’s post topic directory, where you can find the daily questions I posted. For management reasons, if you want to view content from a few days ago, please go through the summary post below. 2018 Chemical Engineering Technology Training – Daily Question Summary Thread: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=18889712018 Registered Equipment Section – Daily Image Summary Thread: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888970
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1) The total head does not match the pump’s head； 2) The density and viscosity of the medium do not match the original design ； 3) The pump shaft is not aligned with the axis of the prime mover or is bent ； 4) There is friction between the rotating part and the fixed part ； 5) Impeller mouth ring wear ； 6) Improper installation of the seal or mechanical seal.
Current overload. Increased traffic leads to reduced efficiency
The traffic is too high； The outlet pressure is too high ； The liquid temperature is low or its viscosity is very high ； Mechanical failures, such as misalignment of the two shafts, shaft bending, and wear of the wear rings
1) The total head does not match the pump’s head; 2) The density and viscosity of the fluid differ from those specified in the original design; 3) The pump shaft is not aligned with the axis of the driving motor or is bent; 4) There is friction between the rotating parts and the fixed parts; 5) The impeller’s mouth ring is worn out； 6) Improper installation of the seal or mechanical seal
The traffic is too high； The outlet pressure is too high ； The liquid temperature is low or its viscosity is very high ； Mechanical failures, such as misalignment of the two shafts, shaft bending, and wear of the wear rings
The traffic is too high； The outlet pressure is too high ； The liquid temperature is low or its viscosity is very high ； Mechanical failures, such as misalignment of the two shafts, shaft bending, and wear of the wear rings
1) The total head does not match the pump’s head； 2) The density and viscosity of the medium do not match the original design ； 3) The pump shaft is not aligned with the axis of the prime mover or is bent ； 4) There is friction between the rotating part and the fixed part ； 5) Impeller mouth ring wear ； 6) Improper installation of the seal or mechanical seal.
overload； The outlet valve is closed ； The installation is not aligned. . .
Impeller damage； The medium density increases, etc
1 The relative density and viscosity of the liquid being transported exceed the values specified in the original design. 2 The impeller size is too large. The 3 pump and motor are not aligned. 4 There is friction between the rotating parts and the stationary parts. 5 The bearings are worn or damaged. 6 The filler is not installed correctly. 7 The mechanical seal exerts too much pressure on the seal seat. The 8-axis seal gland is tightened too much. 9 Improper bearing lubrication. 10-axis bending. 11 The impeller or pump casing area is blocked by solid debris. 12 Impeller damaged.