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purpose of wear ring in impeller and casing in suction side of pump

purpose of wear ring in impeller and casing in suction side of pump

purpose of wear ring in impeller and casing in suction side of pump

(OP)
Dear All
what is the purpose of wear ring in impeller and casing in suction side.
Regards
Pradeep

RE: purpose of wear ring in impeller and casing in suction side of pump

did you try any research?

This decent explanation took me 10 seconds to find... https://www.engineersedge.com/pumps/wearing_rings.....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: purpose of wear ring in impeller and casing in suction side of pump

(OP)
Dear littleinch
I know this but apart from this I wanted to know how does increased wear ring gap affects pump bearing life. Does it also acts as a bearing.
Regards
Pradeep

RE: purpose of wear ring in impeller and casing in suction side of pump

There are numerous other things that effect bearing before considering wear ring clearance. As for the second question - NO.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: purpose of wear ring in impeller and casing in suction side of pump

Any close clearance bushing or wear ring with a pressure differential across it will provide some support for the rotor. Internet search for Lomakin Effect.

Johnny Pellin

RE: purpose of wear ring in impeller and casing in suction side of pump

(OP)
Thanks to all for your precious inputs. I want to ask one more question regarding to boiler feed pump journal bearing and bearing top cover interference. We use HDB 125/9 KSB make pump. it has 9 stages. In journal bearing at DE AND NDE side we keep interference of 0.06mm between bearing and bearing top cover. I just want to ask why inteference is kept. Please give your valuable suggestions
Regards
Pradeep

RE: purpose of wear ring in impeller and casing in suction side of pump

Seems you have opened a second post to address the last question.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: purpose of wear ring in impeller and casing in suction side of pump

(OP)
Dear All
Thanks for your valuable guidance.
Regard
Pradeep

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