Are turbopumps lubricated? The 2019 Stack Overflow Developer Survey Results Are InWhy are rocket engines operating above 100% often considered nominal?Why are Rocket engines at the base of the rocket?What are the maintenance benefits of SABRE engine technology for SSTO launchers?How reliable are pressure fed hypergolic engines?What are the sizes and locations of Progress's thrusters?What's the Isp of a model rocket “D-size” engine, compared to the Isp of engines that do reach space?How large is a magnetoplasmadynamic (MPD) thruster? Are there any upcoming programs using it?How are Voyager's 16 thrusters oriented?What are some notable cold gas thruster propellants, and why?What are the 'lights' inside Shuttle main engines at landing?

Did Scotland spend $250,000 for the slogan "Welcome to Scotland"?

Button changing its text & action. Good or terrible?

What is this business jet?

How to notate time signature switching consistently every measure

Flight paths in orbit around Ceres?

What do these terms in Caesar's Gallic wars mean?

What's the name of these plastic connectors

What information about me do stores get via my credit card?

A word that means fill it to the required quantity

How much of the clove should I use when using big garlic heads?

Is it correct to say the Neural Networks are an alternative way of performing Maximum Likelihood Estimation? if not, why?

Can there be female White Walkers?

Can a flute soloist sit?

Relationship between Gromov-Witten and Taubes' Gromov invariant

Why don't hard Brexiteers insist on a hard border to prevent illegal immigration after Brexit?

Is it ok to offer lower paid work as a trial period before negotiating for a full-time job?

How do PCB vias affect signal quality?

Geography at the pixel level

How do you keep chess fun when your opponent constantly beats you?

Why does the nucleus not repel itself?

Did the UK government pay "millions and millions of dollars" to try to snag Julian Assange?

What is the meaning of Triage in Cybersec world?

If a sorcerer casts the Banishment spell on a PC while in Avernus, does the PC return to their home plane?

Mathematics of imaging the black hole



Are turbopumps lubricated?



The 2019 Stack Overflow Developer Survey Results Are InWhy are rocket engines operating above 100% often considered nominal?Why are Rocket engines at the base of the rocket?What are the maintenance benefits of SABRE engine technology for SSTO launchers?How reliable are pressure fed hypergolic engines?What are the sizes and locations of Progress's thrusters?What's the Isp of a model rocket “D-size” engine, compared to the Isp of engines that do reach space?How large is a magnetoplasmadynamic (MPD) thruster? Are there any upcoming programs using it?How are Voyager's 16 thrusters oriented?What are some notable cold gas thruster propellants, and why?What are the 'lights' inside Shuttle main engines at landing?










2












$begingroup$


It is easy to find data about rocket engine propellant, but quite difficult to ind information about other fluids used in rocket engine. For engine using a turbopump, this pump turns at quite high speed. Such a piece of mechanic should require lubrication in order to work for more than few seconds.



My question is: in engine using turbopumps (RD-107, RS-25, Vulcain,...) how are the turbopump and other moving parts lubricated? What kind of lubricant is used and how is it distributed to moving parts?










share|improve this question











$endgroup$







  • 1




    $begingroup$
    The fluid pumped may be used as lubricant too. A hyrdrocarbon lubricant could not be used for a liquid oxygen pump.
    $endgroup$
    – Uwe
    3 hours ago










  • $begingroup$
    Yep, using the working fluid as the lubricant is pretty common.
    $endgroup$
    – Russell Borogove
    2 hours ago















2












$begingroup$


It is easy to find data about rocket engine propellant, but quite difficult to ind information about other fluids used in rocket engine. For engine using a turbopump, this pump turns at quite high speed. Such a piece of mechanic should require lubrication in order to work for more than few seconds.



My question is: in engine using turbopumps (RD-107, RS-25, Vulcain,...) how are the turbopump and other moving parts lubricated? What kind of lubricant is used and how is it distributed to moving parts?










share|improve this question











$endgroup$







  • 1




    $begingroup$
    The fluid pumped may be used as lubricant too. A hyrdrocarbon lubricant could not be used for a liquid oxygen pump.
    $endgroup$
    – Uwe
    3 hours ago










  • $begingroup$
    Yep, using the working fluid as the lubricant is pretty common.
    $endgroup$
    – Russell Borogove
    2 hours ago













2












2








2





$begingroup$


It is easy to find data about rocket engine propellant, but quite difficult to ind information about other fluids used in rocket engine. For engine using a turbopump, this pump turns at quite high speed. Such a piece of mechanic should require lubrication in order to work for more than few seconds.



My question is: in engine using turbopumps (RD-107, RS-25, Vulcain,...) how are the turbopump and other moving parts lubricated? What kind of lubricant is used and how is it distributed to moving parts?










share|improve this question











$endgroup$




It is easy to find data about rocket engine propellant, but quite difficult to ind information about other fluids used in rocket engine. For engine using a turbopump, this pump turns at quite high speed. Such a piece of mechanic should require lubrication in order to work for more than few seconds.



My question is: in engine using turbopumps (RD-107, RS-25, Vulcain,...) how are the turbopump and other moving parts lubricated? What kind of lubricant is used and how is it distributed to moving parts?







engines






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 3 hours ago









called2voyage

17k772129




17k772129










asked 3 hours ago









Manu HManu H

867622




867622







  • 1




    $begingroup$
    The fluid pumped may be used as lubricant too. A hyrdrocarbon lubricant could not be used for a liquid oxygen pump.
    $endgroup$
    – Uwe
    3 hours ago










  • $begingroup$
    Yep, using the working fluid as the lubricant is pretty common.
    $endgroup$
    – Russell Borogove
    2 hours ago












  • 1




    $begingroup$
    The fluid pumped may be used as lubricant too. A hyrdrocarbon lubricant could not be used for a liquid oxygen pump.
    $endgroup$
    – Uwe
    3 hours ago










  • $begingroup$
    Yep, using the working fluid as the lubricant is pretty common.
    $endgroup$
    – Russell Borogove
    2 hours ago







1




1




$begingroup$
The fluid pumped may be used as lubricant too. A hyrdrocarbon lubricant could not be used for a liquid oxygen pump.
$endgroup$
– Uwe
3 hours ago




$begingroup$
The fluid pumped may be used as lubricant too. A hyrdrocarbon lubricant could not be used for a liquid oxygen pump.
$endgroup$
– Uwe
3 hours ago












$begingroup$
Yep, using the working fluid as the lubricant is pretty common.
$endgroup$
– Russell Borogove
2 hours ago




$begingroup$
Yep, using the working fluid as the lubricant is pretty common.
$endgroup$
– Russell Borogove
2 hours ago










1 Answer
1






active

oldest

votes


















2












$begingroup$

The bearings in the SSME (RS-25) had/have no conventional lubrication as such. They were cooled by minute flows of their respective propellants.




Knowing that the bearings have no lubrication except from a minute
transfer film of the Polytetrafluoroethylene (PTFE) from the cages to
the balls, several attempts at improving the lubrication and lowering
the heat generation in the bearings was investigated.




Source: History of Space Shuttle Main Engine Turbopump Bearing Testing at the Marshall Space Flight Center



Also




HPOTP bearings deteriorate quickly for many reasons. The balls wear
the fastest of all the bearing components and, in the process, lose
their preload. Liquid oxygen is their only lubricant and a poor one
at that.




From here



(HPOTP is High Pressure Oxidizer Turbopump)



You can see the coolant passage in this cutaway drawing of the Low Pressure Fuel Turbopump from here.



enter image description here



Also see here for more on the High Pressure Fuel Turbopump and here for the High Pressure Oxidizer Turbopump.






share|improve this answer











$endgroup$













    Your Answer





    StackExchange.ifUsing("editor", function ()
    return StackExchange.using("mathjaxEditing", function ()
    StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
    StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
    );
    );
    , "mathjax-editing");

    StackExchange.ready(function()
    var channelOptions =
    tags: "".split(" "),
    id: "508"
    ;
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function()
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled)
    StackExchange.using("snippets", function()
    createEditor();
    );

    else
    createEditor();

    );

    function createEditor()
    StackExchange.prepareEditor(
    heartbeatType: 'answer',
    autoActivateHeartbeat: false,
    convertImagesToLinks: false,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    imageUploader:
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    ,
    noCode: true, onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    );



    );













    draft saved

    draft discarded


















    StackExchange.ready(
    function ()
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f35460%2fare-turbopumps-lubricated%23new-answer', 'question_page');

    );

    Post as a guest















    Required, but never shown

























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2












    $begingroup$

    The bearings in the SSME (RS-25) had/have no conventional lubrication as such. They were cooled by minute flows of their respective propellants.




    Knowing that the bearings have no lubrication except from a minute
    transfer film of the Polytetrafluoroethylene (PTFE) from the cages to
    the balls, several attempts at improving the lubrication and lowering
    the heat generation in the bearings was investigated.




    Source: History of Space Shuttle Main Engine Turbopump Bearing Testing at the Marshall Space Flight Center



    Also




    HPOTP bearings deteriorate quickly for many reasons. The balls wear
    the fastest of all the bearing components and, in the process, lose
    their preload. Liquid oxygen is their only lubricant and a poor one
    at that.




    From here



    (HPOTP is High Pressure Oxidizer Turbopump)



    You can see the coolant passage in this cutaway drawing of the Low Pressure Fuel Turbopump from here.



    enter image description here



    Also see here for more on the High Pressure Fuel Turbopump and here for the High Pressure Oxidizer Turbopump.






    share|improve this answer











    $endgroup$

















      2












      $begingroup$

      The bearings in the SSME (RS-25) had/have no conventional lubrication as such. They were cooled by minute flows of their respective propellants.




      Knowing that the bearings have no lubrication except from a minute
      transfer film of the Polytetrafluoroethylene (PTFE) from the cages to
      the balls, several attempts at improving the lubrication and lowering
      the heat generation in the bearings was investigated.




      Source: History of Space Shuttle Main Engine Turbopump Bearing Testing at the Marshall Space Flight Center



      Also




      HPOTP bearings deteriorate quickly for many reasons. The balls wear
      the fastest of all the bearing components and, in the process, lose
      their preload. Liquid oxygen is their only lubricant and a poor one
      at that.




      From here



      (HPOTP is High Pressure Oxidizer Turbopump)



      You can see the coolant passage in this cutaway drawing of the Low Pressure Fuel Turbopump from here.



      enter image description here



      Also see here for more on the High Pressure Fuel Turbopump and here for the High Pressure Oxidizer Turbopump.






      share|improve this answer











      $endgroup$















        2












        2








        2





        $begingroup$

        The bearings in the SSME (RS-25) had/have no conventional lubrication as such. They were cooled by minute flows of their respective propellants.




        Knowing that the bearings have no lubrication except from a minute
        transfer film of the Polytetrafluoroethylene (PTFE) from the cages to
        the balls, several attempts at improving the lubrication and lowering
        the heat generation in the bearings was investigated.




        Source: History of Space Shuttle Main Engine Turbopump Bearing Testing at the Marshall Space Flight Center



        Also




        HPOTP bearings deteriorate quickly for many reasons. The balls wear
        the fastest of all the bearing components and, in the process, lose
        their preload. Liquid oxygen is their only lubricant and a poor one
        at that.




        From here



        (HPOTP is High Pressure Oxidizer Turbopump)



        You can see the coolant passage in this cutaway drawing of the Low Pressure Fuel Turbopump from here.



        enter image description here



        Also see here for more on the High Pressure Fuel Turbopump and here for the High Pressure Oxidizer Turbopump.






        share|improve this answer











        $endgroup$



        The bearings in the SSME (RS-25) had/have no conventional lubrication as such. They were cooled by minute flows of their respective propellants.




        Knowing that the bearings have no lubrication except from a minute
        transfer film of the Polytetrafluoroethylene (PTFE) from the cages to
        the balls, several attempts at improving the lubrication and lowering
        the heat generation in the bearings was investigated.




        Source: History of Space Shuttle Main Engine Turbopump Bearing Testing at the Marshall Space Flight Center



        Also




        HPOTP bearings deteriorate quickly for many reasons. The balls wear
        the fastest of all the bearing components and, in the process, lose
        their preload. Liquid oxygen is their only lubricant and a poor one
        at that.




        From here



        (HPOTP is High Pressure Oxidizer Turbopump)



        You can see the coolant passage in this cutaway drawing of the Low Pressure Fuel Turbopump from here.



        enter image description here



        Also see here for more on the High Pressure Fuel Turbopump and here for the High Pressure Oxidizer Turbopump.







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited 3 hours ago

























        answered 3 hours ago









        Organic MarbleOrganic Marble

        59.9k3165256




        59.9k3165256



























            draft saved

            draft discarded
















































            Thanks for contributing an answer to Space Exploration Stack Exchange!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid


            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.

            Use MathJax to format equations. MathJax reference.


            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function ()
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f35460%2fare-turbopumps-lubricated%23new-answer', 'question_page');

            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            Möglingen Índice Localización Historia Demografía Referencias Enlaces externos Menú de navegación48°53′18″N 9°07′45″E / 48.888333333333, 9.129166666666748°53′18″N 9°07′45″E / 48.888333333333, 9.1291666666667Sitio web oficial Mapa de Möglingen«Gemeinden in Deutschland nach Fläche, Bevölkerung und Postleitzahl am 30.09.2016»Möglingen

            Virtualbox - Configuration error: Querying “UUID” failed (VERR_CFGM_VALUE_NOT_FOUND)“VERR_SUPLIB_WORLD_WRITABLE” error when trying to installing OS in virtualboxVirtual Box Kernel errorFailed to open a seesion for the virtual machineFailed to open a session for the virtual machineUbuntu 14.04 LTS Virtualbox errorcan't use VM VirtualBoxusing virtualboxI can't run Linux-64 Bit on VirtualBoxUnable to insert the virtual optical disk (VBoxguestaddition) in virtual machine for ubuntu server in win 10VirtuaBox in Ubuntu 18.04 Issues with Win10.ISO Installation

            Torre de la Isleta Índice Véase también Referencias Bibliografía Enlaces externos Menú de navegación38°25′58″N 0°23′02″O / 38.43277778, -0.3838888938°25′58″N 0°23′02″O / 38.43277778, -0.38388889Torre de la Illeta de l’Horta o Torre Saleta. Base de datos de bienes inmuebles. Patrimonio Cultural. Secretaría de Estado de CulturaFicha BIC Torre de la Illeta de l’Horta. Dirección General de Patrimonio Cultural. Generalitat ValencianaLugares de interés. Ayuntamiento del CampelloTorre de la Isleta en CastillosNet.org