a silent-bloc is just 2 screw embedded in a mass of rubber, in general it is very resistant to tearing (it is not done to work in this direction)
I too would be scared ...
Study feasibility of wind turbine 2kW home?
Re: Wind power feasibility study of 2kW at home?
No it is not two screws embedded in rubber!
Why would it be less solid than a simple bolt?
Why would it be less solid than a simple bolt?
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Re: Wind power feasibility study of 2kW at home?
Description
Functioning
o Reinforcement: cylindrical plates.
o Natural rubber adhered, cylindrical shape.
o Welded fastening: 5 possibilities (single-sided nut, single-sided screw, screw + nut, screw + screw, nut +
nut).
In Europe, we often use screws and bolts different from the French standard.
To better respond to this diversity, Paulstra has created a new Radiaflex Europe range.
This range is available in the usual 4 versions and in one version: the threaded stop.
The SE 111 pad design gives it the following fundamental properties:
o Radial elasticity greater than its axial elasticity.
o Rubber work:
- in compression (axial),
- in shear (radial),
- or in compression-shear following assembly.
Functioning
o Reinforcement: cylindrical plates.
o Natural rubber adhered, cylindrical shape.
o Welded fastening: 5 possibilities (single-sided nut, single-sided screw, screw + nut, screw + screw, nut +
nut).
In Europe, we often use screws and bolts different from the French standard.
To better respond to this diversity, Paulstra has created a new Radiaflex Europe range.
This range is available in the usual 4 versions and in one version: the threaded stop.
The SE 111 pad design gives it the following fundamental properties:
o Radial elasticity greater than its axial elasticity.
o Rubber work:
- in compression (axial),
- in shear (radial),
- or in compression-shear following assembly.
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- chatelot16
- Econologue expert
- posts: 6960
- Registration: 11/11/07, 17:33
- Location: Angouleme
- x 264
Re: Wind power feasibility study of 2kW at home?
because a bolt is a single piece of scrap: your silent block is rubber adhered to the iron piece: it has a somewhat limited resistance much lower than the strength of the screw
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Re: Wind power feasibility study of 2kW at home?
Yes I just saw it reading the doc until the end so much for me.
I will call Paulstra to get their opinion.
They announce 70 daN of maximum load in shear.
I will call Paulstra to get their opinion.
They announce 70 daN of maximum load in shear.
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Re: Wind power feasibility study of 2kW at home?
except that there your silent-bloc they will not work that in shear, they will also work in traction (especially in case of very strong wind and thus precisely when the efforts will be the most important) and that it is out of specification.
I already have a vague idea of the answer that will make you Paulstra: not planned for, they can not guarantee nothing and absolve themselves of any responsibility in case of accident. When you want to work safely with silent-blocks, there is always another way of fixing in case of breakage of the rubber pads: steel cable, chain, screed, etc ...
If you want silent-blocks that work in traction, you have to opt for another assembly (sandwich)
I already have a vague idea of the answer that will make you Paulstra: not planned for, they can not guarantee nothing and absolve themselves of any responsibility in case of accident. When you want to work safely with silent-blocks, there is always another way of fixing in case of breakage of the rubber pads: steel cable, chain, screed, etc ...
If you want silent-blocks that work in traction, you have to opt for another assembly (sandwich)
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Re: Wind power feasibility study of 2kW at home?
Unfortunately you're right ...
I trusted my father on this one, I was convinced that a threaded rod was surrounded by rubber on this silent block. (hence my initial response to Chatelot's observation)
Do not you think there are antivibration dampers for shear, traction and compression?
I trusted my father on this one, I was convinced that a threaded rod was surrounded by rubber on this silent block. (hence my initial response to Chatelot's observation)
Do not you think there are antivibration dampers for shear, traction and compression?
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- chatelot16
- Econologue expert
- posts: 6960
- Registration: 11/11/07, 17:33
- Location: Angouleme
- x 264
Re: Wind power feasibility study of 2kW at home?
yes there is antivibration mounting with positive security: piece of iron limiting the displacement in case of breakage of the rubber, but it is not standard piece available as your silent block ... it is different engine bracket of different manufacturer automotive
in some cases we put the end of steel cable to limit the damage in case of rupture of silent block, but in your case of the cables will not serve much: if the rubber releases the cables will prevent the alternator from falling to the ground but will not prevent the blades from banging
if you really need a block to make a plate of a diameter one can bigger with 2 times more hole: a silent block on a hole on 2 and a bolt not tightened on the other hole ... hole too big for that the bolt never touches with the normal deformation of the rubber ... and if the rubber loose these extra bolts ensure the safety
but I do not believe at all the use of silent block on a wind turbine! it must turn naturally without vibration
in some cases we put the end of steel cable to limit the damage in case of rupture of silent block, but in your case of the cables will not serve much: if the rubber releases the cables will prevent the alternator from falling to the ground but will not prevent the blades from banging
if you really need a block to make a plate of a diameter one can bigger with 2 times more hole: a silent block on a hole on 2 and a bolt not tightened on the other hole ... hole too big for that the bolt never touches with the normal deformation of the rubber ... and if the rubber loose these extra bolts ensure the safety
but I do not believe at all the use of silent block on a wind turbine! it must turn naturally without vibration
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Re: Wind power feasibility study of 2kW at home?
I'll try my luck here you never know.
I am looking for documentation concerning the assembly of your wind turbine as well as its hybrid controller. The guy who sold it to me had a problem with the manual which is nibbled by small country rodents. In fact I especially need to know that it is the maximum admissible power in photovoltaic input.
I am looking for documentation concerning the assembly of your wind turbine as well as its hybrid controller. The guy who sold it to me had a problem with the manual which is nibbled by small country rodents. In fact I especially need to know that it is the maximum admissible power in photovoltaic input.
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