【Daily Question: Pump Equipment】Discussion Question, April 6, 2019
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This post was last edited by 3983596_FPPZ on 2019-4-6 09:43, with bk12.jpg. Rules for discussion topics: 1. There is no standard answer； 2. Rewards are given based on the completeness and accuracy of the responses; 1-2 wealth points are awarded for each correctly answered key point, with the total reward ranging from 2 to 10 wealth points (for active participation and complete, accurate responses) ； 3. There is no limit on the number of responses per person, nor is there a limit on the number of rewards (the personnel in charge of scoring must control the total amount of rewards for each response) ； 4. The reward is valid for 72 hours; no reward will be given after that period. The pump has won awards again; come and take a look every day. It is a new single-stage, single-suction horizontal centrifugal pump. Its main flow-passing components are made of 304 material, it features ring seals at the front and rear of the closed impeller, and it uses a combination of standard cylindrical roller bearings and paired angular contact ball bearings. Frictional wear between the ring seals occurred shortly after it started operating, which caused the motor protection system to shut it down – the pump could not be rotated. The operation conditions remained stable with no fluctuations. What could be the possible causes of this issue (including factors related to the pump itself as well as the operating conditions)?
Insufficient preheating, pipeline stress, and impurities cause it
My understanding is: ① impurities have entered, ② the assembly clearance is too small, ③ there is no lubrication system resulting in dry friction
1. The medium contains solid particles; 2. The gap around the mouth ring is too small; 3. During operation, if the temperature of the medium is high or low, it should be preheated or pre-cooled
Issues such as bearing quality and lubricating oil. For more professional knowledge, follow the official account: Chemical Equipment Innovation Base
The centrifugal pump shaft is too long, resulting in bending and deformation during operation
1. Pipeline stress 2. Excessively small gap in the mouth ring 3. Impurities in the mouth ring causing abrasive spots