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  1. 12-10-2023, 04:36 PM #1
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    Screw Compressors`s manual



    Good day to All.
    I hope you're doing well. I'm looking for manuals on overhauling screw compressors, like Sabroe, Frick, and Bitzer. I want to understand twin screws, their bearings, and the balance piston in detail. I've done regular maintenance on Frick and Sabroe before, but I'm curious about the deeper aspects of these machines. If you have any experiences or manuals to share, I'd really appreciate it.
    Thanks a lot!
    Best regards,


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  2. 14-10-2023, 04:20 PM #2
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    Re: Screw Compressors`s manual

    please try to response my thread
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  3. 14-10-2023, 10:12 PM #3
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    Re: Screw Compressors`s manual

    shaaf.
    Here is some information, for manuals you need to be more specific of exact models etc.
    Most refrigeration screw compressors have a "balance piston" or "thrust reducing piston"
    Male rotor rotates faster, so has more thrust.
    To reduce load on thrust bearings a hydraulic force (oil pressure) is applied to a piston pushing it in opposite direction
    Discharge pressure forces rotors towards suction end of compressor, balance piston pushes towards discharge end,
    Machines without balance piston usually have more thrust bearings to handle extra loads.

    Balance piston to female rotor (refrigeration-engineer.com)

    Screw Compressor Hand Book - [PDF Document] (vdocuments.net)

    https://www.sabroe.com/fileadmin/use...2010.10_en.pdf

    https://www.sabroe.com/fileadmin/use...10_2012.07.pdf

    http://novinsard.com/uploads/editor/ef5dfe.pdf

    http://www.centralice.com/wp-content...-XJF-Manul.pdf

    https://www.bitzer.de/do.query?count...e=en&website=1

    A lot of links on this above website
    Last edited by RANGER1; 19-10-2023 at 09:24 AM.
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  4. 21-10-2023, 11:47 AM #4
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    Re: Screw Compressors`s manual

    Sir
    Thank you so much for replying. Silly question is male rotor has 4 or 5 lubes and female rotor
    has 6 lubes.
    please explain for me thanks.
    Last edited by shaaf; 21-10-2023 at 12:47 PM.
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  5. 21-10-2023, 08:57 PM #5
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    Re: Screw Compressors`s manual

    Quote Originally Posted by shaaf View Post
    Sir
    Thank you so much for replying. Silly question is male rotor has 4 or 5 lubes and female rotor
    has 6 lubes.
    please explain for me thanks.

    Check this, basically about efficiency with different rotor profiles.
    4/6, 5/6, 5//7 etc

    http://www.staff.city.ac.uk/~ra601/xian11.pdf

    Vol28015.pdf (tamu.edu)
    Last edited by RANGER1; 22-10-2023 at 09:52 PM.
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  6. 28-10-2023, 02:02 PM #6
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    Re: Screw Compressors`s manual

    bunch of service manuals
    https://drive.google.com/drive/folde...usp=drive_link
    -Cheers-

    Tycho
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