Week 14 challenge
Objective:
The objective of this project is to design the assembly of the Butterfly valve and apply the GD&T concepts to the various parts of the Butterfly Valve.
Name of the Parts:
1. Body
2. Shaft-Stem
3. Top Flange
4. Disc Plate
5. Lever Handle
6. Nut
BODY
A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates. A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.
Shaft-Stem.
- The stem of the butterfly valve may be a one-piece shaft or a two-piece (split-stem) design. This design consists of a one-piece shaft. The disc/plate, lever, and nut are assembled to this shaft.
- First, create a sketch that is cylindrical in shape along with steps. That sketch must be fully constrained and closed in order to use Revolve command.
FLANGE
Retainer is a kind of washer fixed on the body of butterfly valve.
DISC
When valve is fully opened or closed the disc is rotated a quarter turn.Disc is mounted on shaft. When the valve is closed, the disc is turned so that it completely blocks off the passageway.When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid.
LEVER
Lever is mounted at an end of shaft outside the body. Hand lever is usually used in small sized Butterfly valves. It is used to open or close the valve.
6. NUT
It is fixed at the top end of shaft to keep the lever and retainer on position relative to the body of butterfly valve.
ASSEMBLY
After completing the modelling of various components of butterfly valve, all parts were assembled together using Siemens NX Assembly workbench.
CONCLUSION
Butterfly valve was successfully designed and GD&T applied to all parts and the assembly of the Butterfly valve.