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Talk:Small water turbine

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Contents

Part number 1 -- Xtech2020 review (talk) 02:58, 3 March 2021 (CET)

this pdf drawing is missing

Re: Part number 1 -- Inddigital (talk) 01:32, 7 March 2021 (CET)

Solved!

Part number B -- Xtech2020 review (talk) 03:06, 3 March 2021 (CET)

  • In parts list online it says "CAST IRON", in pdf it says nothing
  • Cast iron can not be used, because in small scale this technology is not used.

Re: Part number B -- Inddigital (talk) 01:46, 7 March 2021 (CET)


  • Drawings have been updated
  • It is correct, cast iron is not practical today, it was placed, following the original design, the observation will be taken into account for an improved version of the equipment (a fork).

Part number 3.3 -- Xtech2020 review (talk) 03:10, 3 March 2021 (CET)

What is the thickness of this part?

Re: Part number 3.3 -- Inddigital (talk) 01:02, 4 March 2021 (CET)

Hi xtech, your comment has been resolved, please remove the Action Required check mark.

Part number B -- Xtech2020 review (talk) 03:16, 3 March 2021 (CET)

it is recommended to indicate DIN references for fasteners parts

Re: Part number B -- Inddigital (talk) 01:47, 7 March 2021 (CET)

I will try to keep it as it is, since they are size references under American standard with DIN and ISO equivalents easily found.

-- Xtech2020 review (talk) 03:20, 3 March 2021 (CET)

It is suggested to include some theoretical estimates of equipment capacity and efficiency.

Re: -- Inddigital (talk) 00:34, 4 March 2021 (CET)

you can get a complete theoretical analysis at: https://dspace.mit.edu/handle/1721.1/27493

Among others, some characteristic curves of the equipment are shown, like this one:

Oseg swt curves1.jpg

Part number B -- Xtech2020 review (talk) 19:48, 3 March 2021 (CET)

In some items it says cap machine, I think it is a mistake.

Re: Part number B -- Inddigital (talk) 01:47, 7 March 2021 (CET)

Solved!

Part number B -- Xtech2020 review (talk) 19:50, 3 March 2021 (CET)

the Sheet and Qty columns must be updated

Re: Part number B -- Inddigital (talk) 01:48, 7 March 2021 (CET)

Solved!, thanks for this observation.

Part number 11.3 -- Xtech2020 review (talk) 19:57, 3 March 2021 (CET)

Specifications of this Standard part are missing

Re: Part number 11.3 -- Inddigital (talk) 03:34, 4 March 2021 (CET)

Answered

Part number 11.5 -- Xtech2020 review (talk) 19:58, 3 March 2021 (CET)

Specifications of this Standard part are missing

Re: Part number 11.5 -- Inddigital (talk) 03:34, 4 March 2021 (CET)

Answered

Part number 5 -- Xtech2020 review (talk) 23:19, 3 March 2021 (CET)

For sliding fit moving parts, it is highly recommended to place dimensional tolerances on the dimensions where applicable. In the absence of this, a general value could be specified for these dimensions

Re: Part number 5 -- Inddigital (talk) 01:09, 4 March 2021 (CET)

Thanks for your suggestion, a new thread has been opened in general comments and technical notes, to highlight this point.

-- Xtech2020 review (talk) 23:44, 3 March 2021 (CET)

Most of the parts are missing material specification

Re: -- Inddigital (talk) 01:31, 7 March 2021 (CET)

Thank you for your comment, this issue has been resolved.

Part number 7.2 -- Xtech2020 review (talk) 23:55, 3 March 2021 (CET)

this piece does not appear to correspond to any of the original design, it should be removed.

Re: Part number 7.2 -- Inddigital (talk) 03:26, 4 March 2021 (CET)

Yes, the part must exist for internal sliding of the impeller. Drawings have been updated

-- Inddigital (talk) 01:06, 4 March 2021 (CET)

In cases of sliding parts, use 0.2 mm as tolerance for diametrical dimensions. This item has been included in technical notes.

Part number 6.2 -- Xtech2020 review (talk) 01:12, 4 March 2021 (CET)

this pdf drawing is missing

Re: Part number 6.2 -- Inddigital (talk) 01:41, 7 March 2021 (CET)

Solved!

Part number B -- Inddigital (talk) 02:40, 4 March 2021 (CET)

...

Part number 2 -- Xtech2020 review (talk) 02:51, 4 March 2021 (CET)

this pdf drawing is missing

Re: Part number 2 -- Inddigital (talk) 01:33, 7 March 2021 (CET)

Solved!

Part number 3.1 -- Xtech2020 review (talk) 18:30, 6 March 2021 (CET)

Missing material

Re: Part number 3.1 -- Inddigital (talk) 01:33, 7 March 2021 (CET)

Solved!

Part number 4 -- Xtech2020 review (talk) 18:32, 6 March 2021 (CET)

  • What material?
  • How it is manufactured?

Re: Part number 4 -- Inddigital (talk) 01:37, 7 March 2021 (CET)

As explained in technical notes, the manufacturing process can be by fiberglass forming or polyester resin casting. Other materials such as epoxy resins and other processes such as CNC machining and 3D printing are not ruled out.


Here some usefull links:

Part number 5 -- Xtech2020 review (talk) 18:34, 6 March 2021 (CET)

  • The blades views are missing
  • How is it manufactured?

Re: Part number 5 -- Inddigital (talk) 01:41, 7 March 2021 (CET)

The profile view for the blades has been slightly modified to allow for better detailing.

As explained in technical notes, the manufacturing process can be by fiberglass forming or polyester resin casting. Other materials such as epoxy resins and other processes such as CNC machining and 3D printing are not ruled out.
Here some usefull links:

Part number 7.1 -- Xtech2020 review (talk) 18:35, 6 March 2021 (CET)

How is it manufactured?

Re: Part number 7.1 -- Inddigital (talk) 01:42, 7 March 2021 (CET)

As explained in technical notes, the manufacturing process can be by fiberglass forming or polyester resin casting. Other materials such as epoxy resins and other processes such as CNC machining and 3D printing are not ruled out.

Here some usefull links:

-- Xtech2020 review (talk) 02:04, 7 March 2021 (CET)

All issues have either been resolved or properly channeled. OK, FINISHED.

Part number 15 -- Thehunter (talk) 12:03, 11 March 2021 (CET)

the specifications for the generator depend on whether it is intended for grid feeding, if so 50 or 60 Hz? Or whether it is intended to charge batteries, if so twelve or 24 V. This means that they must be defined project-specifically

Re: Part number 15 -- Inddigital (talk) 00:08, 7 April 2021 (CEST)

According to the original development, the equipment would be used to feed an electrical network (coffee farm in South America), which is why they have selected a 60Hz generator, however, I believe that this can be adapted to the needs of who will replicate them. In any case, the same original design was followed. Likewise, the project description will be updated.

-- Thehunter (talk) 12:06, 11 March 2021 (CET)

The speeds of the generator and turbine must match. The speed of the turbine depends on the amount of water and the head, a calculation for the specific application should be made. Alternatively, the turbine can be put into operation first, then speed measurements are taken and the power transmission and generator are designed afterwards.

Re: -- Inddigital (talk) 22:41, 6 April 2021 (CEST)

I agree with testing, it is the most reliable way to size the equipment. For the moment I am basing on the calculations and graphics of the source: for a 4 poles generator, at a speed of about 850 rpm, guaranteed by an availability of 10 m of water column, we can apply: frec=poles*vel/60 = 4*850/60 = 56.67 hz, which we can achieve at a good efficiency of about 77%.

-- Thehunter (talk) 12:18, 11 March 2021 (CET)

There are a number of castings in this project. As castings are difficult to produce in smaller workshops, consideration should be given to replacing them with welded constructions and/or standard parts. Proposal for an improved version.

Re: -- Inddigital (talk) 22:46, 6 April 2021 (CEST)

Totally agree, in an improved version, we can propose a more feasible design for these parts, in DIY developments and reduce costs.

Part number 2 -- Thehunter (talk) 12:22, 11 March 2021 (CET)

this part can be made by welding together two flanges and a ring

Re: Part number 2 -- Inddigital (talk) 23:04, 6 April 2021 (CEST)

As in the previous case, NC and CNC machining of steel is suitable, we can implement it in an upgraded version of the equipment.

Part number 1 -- Thehunter (talk) 12:26, 11 March 2021 (CET)

this part can be made by welding together two flanges and a welded cone

Re: Part number 1 -- Inddigital (talk) 23:03, 6 April 2021 (CEST)

Yes, the current NC and CNC machining processes facilitate the production of these steel parts, we can implement it in an improved version of the equipment.

Part number 3.3 -- Thehunter (talk) 12:29, 11 March 2021 (CET)

What is the easiest way to bend 8 mm steel evenly round?

Re: Part number 3.3 -- Inddigital (talk) 23:12, 6 April 2021 (CEST)

On this part I recommend hot roll bending because of the thickness

Part number 3.5 -- Thehunter (talk) 12:33, 11 March 2021 (CET)

Does the drawing need to indicate the distance of the center point from the baseline?

Re: Part number 3.5 -- Inddigital (talk) 23:20, 6 April 2021 (CEST)

Correct, although this drawing is dimensionally complete, for a machining process it is highly recommended to use linear dimensions from existing edges and corners, however, manufacturers often reprint drawings with additional dimensions as required, especially if CAD files are available. In any case I will add the dimension you indicate as it is appropriate.

Part number B -- Thehunter (talk) 12:37, 11 March 2021 (CET)

The parts list should generally be created in landscape format, otherwise it is not easy to read online

Re: Part number B -- Inddigital (talk) 23:35, 6 April 2021 (CEST)

Ok, copied, we will proceed to its correction.

Part number C -- Thehunter (talk) 12:38, 11 March 2021 (CET)

The Technical notes should generally be created in landscape format, otherwise it is not easy to read online

Re: Part number C -- Inddigital (talk) 23:36, 6 April 2021 (CEST)

Ok, copied, we will proceed to its correction.

-- Thehunter (talk) 13:27, 11 March 2021 (CET)

the PDF pages are displayed upright and thus poorly readable, just realize that this is due to my browser

Re: -- Inddigital (talk) 22:49, 6 April 2021 (CEST)

Oh, thanks for the alert, we will take it into account for a new version of the equipment.

Part number 6.1 -- Thehunter (talk) 13:31, 11 March 2021 (CET)

very difficult to produce in small workshops

Re: Part number 6.1 -- Inddigital (talk) 23:32, 6 April 2021 (CEST)

I understand, although I should mention that some fiberglass and polyester molding processes can be more or less accessible, as long as the manufacturer has some knowledge about it.


Here some usefull links:

-- Thehunter (talk) 13:32, 11 March 2021 (CET)

due to the relatively complicated production of various components, this project is only recommended for small workshops to a limited extent

Re: -- Inddigital (talk) 22:52, 6 April 2021 (CEST)

Ok, this remark will be added in the technical notes.

Part number 13.2 -- Thehunter (talk) 13:36, 11 March 2021 (CET)

According to the drawing for part 13.2, four sheet metal strips of different lengths are required in some cases, the drawings are not complete

Re: Part number 13.2 -- Inddigital (talk) 23:55, 6 April 2021 (CEST)

This piece was considered as a single strip of 1575.6*117 mm, which is bent and welded to acquire the shape shown, we will proceed to include the respective dimensions and specifications.
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