Wicket Gate

Wicket Gate
I finally got a good cross-sectional view of how the Wicket gate and Turbine blades all fit together. Now I have to ask .. when a book is referring to a turbine ‘wheel’ .. as in a chart showing estimated power based on water flow, head .. and WHEEL DIA. .. what is this referring to? The dia of the turbine/blade structure? I’m guess that is true .. then I need to figure out how much ‘add on’ is then represented by the gate (Wicket gate in this case). What I’m saying is that .. my ‘guesstamate’ from photos is that the gate you see inside the turbine housing is approximately 1/3 the dia of that casing. If the ‘wheel dia’ is the outside dia of the blades on the shaft .. then what is the estimate of the Wicket gate to that dia? That affects the design of the casing.
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About etraxx

Retired from the Army in 2006. Served during Vietnam - 1969-1972 as as 72B - Communications Center Specialist (Teletype Operator). Got out .. and went back in 1987 as a 19K - Armor Vehicle Crewman - (M1/M1A1 tanker) getting out in Korea in 1999. Went into the Reserves .. got mobilized in 2001 .. stayed active until my retirement with 20 years in 2006.


Wicket Gate — 8 Comments

    • I looked up the term “Wicket Gate” and they showed a photo of a large double door such as to a shop with a smaller (human size) door inset into it. SO .. the photo of the Wicket Gate I posted at the top of the page appears to me to be a series of ‘paddles’ that each swivels by themselves to open/close/adjust flow. The cylindrical gate you show above .. are the blades fixed and the entire mechanism turns with the blades fixed?

      • Yes, the wicket gate you show has individual airfoil shaped vanes controlled through connecting rods that are attached to a segment gear that is meshed with a small pinion gear on the control shaft that exits out of the pressure casing.

        The Cylindrical gate has stationary vanes and a pipe shaped gate that cuts the flow of water. See picture. That is not my picture BTW. I grabbed it off of the net, so don’t use it for anything else.

  1. I would think that the one with the movable gates would be easier to mold because you could cast the wickets into the base, then cap it off with the cover plate with all of the rods and segment gear molded into place.

  2. I can run down to Collinsville, CT where I took the pics of the turbine that I had posted up on the kit forum should you need some close up pics of the wicket workings. I don’t have a good one from the top, uh side. Don’t know what I was thinking about not getting a good shot of that.

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