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Vanes in Slurry Pump

  • 14-01-2009 8:10am
    #1
    Trx
    Closed Accounts Posts: 345 ✭✭


    I need to change the vanes in one of the slurry pumps... Anyone ever done it before or know where I can get step by step instructions.

    Cheers


Comments

  • #2
    Sam Kade
    Registered Users, Registered Users 2 Posts: 12,313 ✭✭✭✭Sam Kade


    I changed the vanes of a vacum tanker pump a few years ago. I presume it's a vacum tank you are talking about. What I done was I took off all the bolts in front of the pump and slowly pull out the rotor. The rotor is fairly heavy and could be easily cracked if you leave it fall. You would want 2 people to lift it. Then I took off the old vanes and replaced them with the new ones. Make sure that the shaft fits into the bearing at the other end as you push the rotor back into position. After replacing the rotor you need a new gasket with a light film of grease line it up and tighten the bolts.


  • #3
    Trx
    Closed Accounts Posts: 345 ✭✭Trx


    Thanks Sam.


    Where did you get the Vanes and are they expensive. Is there anything else that needs changing when I have her cranked open !!!!


  • #4
    quietsailor
    Registered Users, Registered Users 2 Posts: 1,428 ✭✭✭quietsailor


    I haven't repaired / opened a vacumn tanker pump but I worked on vacumn pumps at sea so the principles are the same.

    1. Check the slots the vanes slide into for cracks
    2. Check the slots to see if they have worn wider or does the vane slide in with no looseness
    3. Check the end plates - the one you remove to get at the rotor- to see if they are worn.
    4. Replace any locking fasteners - they are only a few euros but if they fail your pump will be wrecked.
    5. Lightly lubricate everything as you replace it.

    Good Luck


  • #5
    Sam Kade
    Registered Users, Registered Users 2 Posts: 12,313 ✭✭✭✭Sam Kade


    I bought the vanes from my local machinery dealer. I can't remember how much they cost a rough guess would be around €60-€100. All I had to change were the vanes and gasket.


  • #6
    Trx
    Closed Accounts Posts: 345 ✭✭Trx


    Sam...

    Removed rotor but the vanes are standing proud a few mm.. They dont seem to be worn.. If they were any thicker there would not be enough clearance and re-assembly would be impossible !!


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  • #7
    Trx
    Closed Accounts Posts: 345 ✭✭Trx


    Do the vanes need to slide in and out of the housing


  • #8
    Rovi
    Closed Accounts Posts: 8,570 ✭✭✭Rovi


    Rotary vane pumps work by the vanes sliding in and out of the rotor as it rotates.
    If the vanes are stuck in the rotor, the pump won't do anything but make noise.


  • #9
    Trx
    Closed Accounts Posts: 345 ✭✭Trx


    Cheers Rovi.. It appears that the vanes are jammed in the slots !!! Will Most likely have to replace them !!!!


  • #10
    Rovi
    Closed Accounts Posts: 8,570 ✭✭✭Rovi


    Not necessarily.

    The vanes are most likely just jammed with rust and/or slurry from the tanker getting overfilled and then sitting idle for a while.
    Remove the rotor from the pump, and prize the vanes out of the slots.
    Give everything a good scrub of a wire brush and a light coating of vacuum pump oil.
    The vanes should move freely up and down in the slots.

    Reassemble and test.
    Make sure the oil pump is actually dripping oil into the pump; this is what keeps everything working smoothly.


  • #11
    Sam Kade
    Registered Users, Registered Users 2 Posts: 12,313 ✭✭✭✭Sam Kade


    Trx wrote: »
    Sam...

    Removed rotor but the vanes are standing proud a few mm.. They dont seem to be worn.. If they were any thicker there would not be enough clearance and re-assembly would be impossible !!
    The vanes I changed didn't seem to be worn either but I was advised to change them. When they old they can crack and destroy the pump. However I know someone that has the same tank with almost 30 years and they never changed the vanes.


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  • #12
    yupyupyup
    Registered Users Posts: 47 ✭yupyupyup


    hi if anyones readin this in the future i got the vanes replaced last week. vanes cost €70, (theres 7 vanes @ €10 each) labour was about 60/70 quid, i got other stuff done as well. we have our tank over 16 yrs and it was the first time we replaced it. it comes highly recommended.


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