New answers tagged mechanical-engineering
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Trying to detach a detachable handle on a meat grinder
Because the joint created by the handle and the auger bit is solid metal, the threading is, as you've noted, held in place by the rotation.
It is common that a sharp blow on the handle in the correct ...
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What would be the consequence of operating a mechanical transmission at low temperatures
If the coolant is between 10-40 degrees, then the engine will be operating at too low a temperature.
For the transmission that may not be such a problem.
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Looking for bolt with press nut
One name it goes by is a PEM pin.
In addition to the various washer names given by Solar Mike, it might also be called various forms of push-on retaining clips/rings (whereas a normal retaining clip ...
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Looking for bolt with press nut
The washer is often called a lock washer, star lock washer or clamping washer or ring.
The threadless bolt is often called a pin.
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What is the difference between maximum principal strain and maximum in-plane principal strain?
If my memory serves me correctly, the "max principal strain" is the maximum strain caused by the out-of-plane stresses, for which shear stress is zero. The maximum in-plane strain, on the ...
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What is the difference between maximum principal strain and maximum in-plane principal strain?
Nature doesn't care how we assign our coordinate system, so we have to look for a special reason to be concerned with a certain elasticity parameter in a certain plane that we've defined.
Perhaps we ...
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How to balance an irregular shape on a motor shaft?
The high school science method is to hang your object from two random points and mark the vertical plumb lines, the intersection of the two lines is the CG.
There are a vast number of different types ...
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Any real heat engines based on the Carnot cycle? (or an equally efficient cycle)
There is a project for a heat engine based on Carnot cycle here :
https://dada-engine.org
But it needs lot of work before giving something real.
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Is a Geodesic Dome (fuller dome) that floats possible? What material or engineering effort would it take?
One way to interpret this scenario is to envision a rigid geodesic dome completed into a sphere, and ask if it could float in the atmosphere because the weight of the contained air is less than the ...
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Deformation Due to Material Removal and Residual Stress
I would like to quantify how the residual stress field of the piece of metal changes due to the material removal.
For this, I would recommend analysing relatively simple beam bending of a bimetallic ...
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Using two motors and belt drives to drive one shaft
Instead of these arrangements have 2 motors with equal qty of v belts and double the qty of v grooves on driven pulley with both motors having takeup device will work perfectly.
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Connect two motors to different planes and rotate them on the same center point
This is the same as what is required for coaxial propellers and rotors. They generally required a hollow shaft somewhere so another shaft can run through it, and a way to drive both shafts. That ...
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Connect two motors to different planes and rotate them on the same center point
It seems to me that you need a shaft in shaft solution, if you imagine one shaft is longer than the other and one is inside the other. Then the are both supported by a structure with bearings. Then ...
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One way bearings
So check out inclined ramp or sprag clutches or even look at the gear drive used in starter motors.
The inclined ramp means that the rollers rotate into a tapering or tightening dimension in one ...
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How can I calculate the pressure in a pipe?
To calculate the maximum pressure in a pipe, you can use Barlow's formula. This formula can be used to determine the internal pressure at minimum yield, ultimate bursting pressure, maximum allowable ...
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In a lead screw mechanism with a fixed travelling nut, will the screw and its driving mechanism move instead?
The ballscrews control the relative position of the base and the platform. Fixing one in space will cause the other to move.
- 10.4k
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Will a lid hovering above bursting air bubbles catch smog particles
Sounds over complicated.
Smog is composed of nitrous, carbon monoxide, sulfates suspended in atmosphere, Real best way to get rid of it, is humidity.
Because these fine composites soluable in water.
...
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Is there a way to add a DIY knock sensor to an engine?
A knock sensor is an accelerometer, with a restricted bandwidth. The location and the bandwidth and the sensitivity/threshold are important. For a production engine we run it at light knock (detected ...
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Will a lid hovering above bursting air bubbles catch smog particles
If your reasoning is that the air molecules are much smaller and simply escape from the sides, then you could just have a lid with a bunch of very small openings in it...which is what a filter is. So ...
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Continuous swinging machine
Your best bet would be to design around the natural period of oscillation as this will minimise the amount of energy required.
$$ T = 2 \pi \sqrt {\frac L g} $$
where $T$ is the periodic time, $L$ is ...
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Is there a way to add a DIY knock sensor to an engine?
Some of the knock sensors are designed to fit into a bolt hole.
Some are designed as bolt through ie a "ring" for the sensor where the bolt goes through.
Either way, the issue will be having ...
- 15.5k
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Pumping machine (Centrifugal ) fails to pump
You may have check the seals in housing, otherwise the pump is sucking air instead of water. Run thru a trial test in a tub/pool
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If a fluid is incompressible,is it correct to say that the flow may or may not be incompressible?
There are cases like cavitation, where due to high velocity of fluid the pressure drops and vapour forms. This vapour is compressible though the fluid might be in-compressible.
Similarly, in the cases ...
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What is the name for a design element which includes trusses within a member?
Reinforcing ribs does seem to be the answer, not sure why I couldn’t conjure that term!
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Designing a non-circular radial o-ring seal
Did you ever get your question answered to?
[This is a good reference for design, these guys also have real engineers to answer your questions.
https://www.canyoncomponents.com/reference-hub
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Why does/doesn't this structure qualify as a truss/frame?
My perspective on this is no. You may have two members that are connecting the two joints, but in a mathematical sense, those two members would be combined together to simplify the problem. With only ...
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Why does/doesn't this structure qualify as a truss/frame?
From my perspective this qualify as a frame, but not as a truss (provided the green circles are intended as pins).
Trusses and Frames differ from a structural point of view in two aspects:
...
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Activate a mechanical end-stop with a lever
After reading a bit about engineering, it seems like a better choice would be a cam mechanism along the pivot point of the hinge, which, when lifted by the loom lever, would activate the mechanical ...
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How can I calculate the pressure in a pipe?
The pressure needs to be known at some point in the system if you want to calculate pressure distribution in the whole system. Flowrate is basically proportional just to the pressure difference, so ...
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Why are car bodies not made of titanium?
Price average Titanium alloys costs 70-80 dollars a pound.
Steel cost 0.03 dollars a pound.
A unibody car chassis suddenly becomes 2000x more expensive for the raw material alone.
Workability, ...
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