Thursday, 21 June 2012

Rudder Carrier bearings

Rudder Carrier bearings
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The rudder carrier bearing takes the weight of the rudder on a grease lubricated thrust face. The rudder stock is located by the journal, also grease lubricated. Support for the bearing is provided by a doubler plate and steel chock. The base of the carrier bearing is located by wsdge type side chocks, welded to the deck stiffening. The carrier is of meehanite with a gunmetal thrust ring and bush. Carrier bearing components are split as necessary for removal or replacement. Screw down lubricators are fitted, and the grease used for lubrication is of a water resistant type (calcium soap based with graphite).

Weardown

A small allowance is made for weardown, which must be periodically checked. This may be measured either between pads welded on top of the rudder and onto the rudder horn, or between the top of the rudder stock and a fixed mark on the inner structure of the steering gear flat. The latter generally involves the use of a 'Trammel gauge' which takes the form of a 'L' shaped rod ade to fit the new condition of the gear. As wear down occurs it can easily be checked with this gauge. The rudder is prevented from jumping by rudder stops welded onto the stern frame.

Rudder movement stops

Rudder stops are arranged as follows;
Angle from centreline Position of stop Note
35oOn telemotor systemNormal limit
37oOn steering gearPrevents rudder striking external stops
39oExternal, on stern frameemergency stop to protect propeller
These limits refer to rudders of traditional design and is governed by both the physical layout of the rudder and actuator but also due to the stall angles of the rudder. i.e. the angle at which lift ( turning moment ) is reduced or lost with increasing angle of attack. There are designs of rudder such as becker flap which have increased stall angles up to 45o

Critical profiling of carrier bearing

critically profiled carrier bearing
    Reasons for critical contouring of thrust face;
    1. for lubrication
    2. conical in order to prevent side slip and centralise rudder
    3. projected area gives greater bearing area allowing smaller diameter bearing

12 comments:

  1. Those are really good features there. Look like it is of high standard items too. Great.
    white metal bearings

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    1. I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
      brian

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  2. Thank you for this article. Personally, I think this material is great. I agree with much of your information here. It also motivates me to learn more. I await the next article with great anticipation.
    hydrodynamic bearings

    ReplyDelete
    Replies
    1. I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
      brian

      Delete
  3. Thank you for this article. Personally, I think this material is great. I agree with much of your information here. It also motivates me to learn more. I await the next article with great anticipation.
    white metal bearings

    ReplyDelete
    Replies
    1. I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
      brian

      Delete
  4. hose looks like quality made bearings. Great to look at.
    hydrodynamic bearings

    ReplyDelete
    Replies
    1. I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
      brian

      Delete
  5. can u please mark the trust face in the second diagram and i ve doubt whether both blue and green are bearings in the 2nd diagm

    ReplyDelete
  6. I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
    brian

    ReplyDelete
  7. I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
    brian

    ReplyDelete
  8. What type of bearing is rudder carrier bearing?

    ReplyDelete