![]() | ||||
Fig.B-10
Binary (two-position) fluidic indicatorof state in manufactured by Norgren, United Kingdom: Diaphragm deformation due to hydrostatic pressure admitted into input X is transformed by the crank mechanism into rotation of the sphere, the alternatively visible halfs of which are diffe- rently painted. Used on a panel, dimensions equivalent to those of a light-bulb electric indicator.
|
![]() | ![]() |
![]() |
|
![]() | ![]() | ||
Fig.B-11 |
![]()
| |
![]() | |
![]() | |
- caused by hydrostatic pressure of liquid in a vessel:
A typical problem the solution of which is handled in this paragraph
is calculation of the stress in bolts (or number of bolts) which hold some cover
that covers an opening in the vessel wall.
It is assumed that there is the barometric pressure
acting on the liquid surface (- this means
pressure vessels are not considered) as well
as on the
outer face of the cover. In Fig.B-12 there is a derivation
of the elementary force on an infinitesimally small wall (cover) surface element.
The effects of
from the both sides
cancel each other so that
the elementary force depends only upon the height
of liquid layer
between the investigated area element and the level surface above.
The resultant force effect is then obtained by integration over the
whole
part
![]() | |
![]() | |
![]() | |
Obr.B-14
|
click
Vaclav TESAR : "BASIC FLUID MECHANICS"