Functions of a Pressure Gauge:
→ It is having dial which graduated to read pressure in
bar, above atmosphere.
→ A Bourdon tube gauge with its interior mechanism is shown
in figure.
→ The circular bent bourdon tube of oval-cross section is close at one
end and connected at the other end to steam space of boiler through siphon
(U-tube).
→ The siphon is filled with water which prevents hot steam from
entering the pressure gauge and keeps the gauge cool.
→ Closed end of bourdon
tube is attached to a toothed quadrant with help of link and pin. This quadrant
meshes with a small pinion on the central spindle.
 |
| Bourdon tube type pressure gauge |
Working Principle of a Pressure Gauge:
→ When pressure is applied to inside of oval bourdon tube, its
cross section tends to becomes circular, and free end of bourdon tube try to
becomes straight, so turning the spindle by the links and gearing.
→ This causes
the needle to move and indicate pressure on graduated dial.
No comments:
Post a Comment