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Thread: yk disaster

  1. #14
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    Quote Originally Posted by motoguy128 View Post
    I assume that regular vibration analysis likely have caught the bearing wear before failure? Or was this unit overdue for a rebuild?
    You're assuming that there was bearing wear. It could have been that, as well as several other things.

  2. #15
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    Quote Originally Posted by nyrb View Post
    Did it look something like this?? You're in for a fun time.
    I bet any one within a 50 yard radius of that went home with bleeding ears that day

  3. #16
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    Quote Originally Posted by klove View Post
    You're assuming that there was bearing wear. It could have been that, as well as several other things.
    What else could it have been? We've covered the high speed thrust and journal. Could it have been the impeller nose seal was set up wrong to begin with or came loose? I haven't seen the insides of a YK, so I am running out of ideas

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  4. #17
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    Quote Originally Posted by Tech Rob View Post
    What else could it have been? We've covered the high speed thrust and journal. Could it have been the impeller nose seal was set up wrong to begin with or came loose? I haven't seen the insides of a YK, so I am running out of ideas

    The list of reasons that something like that can happen is long and varied, and a lot of times includes multiple issues simultaneously that can culminate in a bad end result. I've seen it on Yorks, but never on a Trane. One reason (I believe) is that the impeller seals on Yorks are much tighter tolerance than Tranes. Either of the items that you mentioned are viable reasons.

  5. #18

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  6. #19
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    Brace yourself, Vice. You're probably going to hear from some folks about the site rules, which you should have read and understood before posting.

  7. #20
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    i took it apart checked the thrust its in range. i think that either the impeller broke (highly unlikely) or the nose seal came apart. the nose seal doesnt actually have to set up like a trane its floating on springs and self centers. now when the machine was surging for yaers before and thrust bearings were changed its hard to say how many times it surged. i also found the nose seals mounting bols sheared off? could it have beed the cause of the failure or result of it. the funny part is no one new it was tripped it was off on high oil temp go figure.

  8. #21
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    Quote Originally Posted by klove View Post
    Brace yourself, Vice. You're probably going to hear from some folks about the site rules, which you should have read and understood before posting.

    does this mean i cant advertise? damn !!

    anyways this is a great post covering the damages of the inside of a machine.,

    i know that the trane is running around 3500 rpm
    compared to the york at about 35000 rpm., hince: size,
    i guess that the diff in rpm would be the reasonong behind the tighter tolerances ,.
    however i am not a pro and i am running ideas through my tiny tiny brain as well.


    ,. another spelling flaw., tiny = small
    tinny = even smaller than tiny .,

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  9. #22
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    I was thinking of the difference in speed too, Milkyway. And I also like reading these types of threads, especially about equipment I'm not familiar with.

  10. #23
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    nose seal clearances don't have any direct relationship to speed. they have to do with pressure increases across the impeller...greater pressure increases equal greater leakage from the high side of the impeller to the low side of the impeller. the greater the leakage, the less efficient the compressor. with the york, there is a greater pressure increase across that 1 impeller versus the 2 or 3 across the trane.

    also, the pressure increase across a 1 impeller, R134a is going to be a lot higher than across a 3 impeller R123 chiller.
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  11. #24
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    i know that the trane is running around 3500 rpm
    compared to the york at about 35000 rpm., hince: size,
    i guess that the diff in rpm would be the reasonong behind the tighter tolerances ,.
    however i am not a pro and i am running ideas through my tiny tiny brain as well.

    York doesn't run at 35000 rpm that would be more like a McQuay high speed or as we would say screamer Yorks are more in the 12000-15000 range.
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  12. #25
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    Quote Originally Posted by york56 View Post
    i know that the trane is running around 3500 rpm
    compared to the york at about 35000 rpm., hince: size,
    i guess that the diff in rpm would be the reasonong behind the tighter tolerances ,.
    however i am not a pro and i am running ideas through my tiny tiny brain as well.

    York doesn't run at 35000 rpm that would be more like a McQuay high speed or as we would say screamer Yorks are more in the 12000-15000 range.
    thx
    no signature blast'em man blast'em
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  13. #26
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    Yeah, thanks, Jay and York56.

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