Turbine design for flow meter
A turbine wheel used in a turbine flow meter includes a hub configured to be freely rotatably fixed in position inside a fluid pipe section. A first cylindrical rim is centered about the hub and the longitudinal axis and spaced a distance apart from the hub. A first vane set extends outwardly from the hub to the first cylindrical rim, wherein a root of each vane of the first vane set is attached to the hub and a tip of each vane of the first vane set is attached to the first cylindrical rim. The first vane set may consist of one or two individual vanes. An external vane set may extend outwardly from the first cylindrical rim, wherein a root of each vane is attached to the first cylindrical rim and a tip of each vane is not attached to any cylindrical rim.
1. A turbine wheel configured for use in a turbine flow meter, the turbine wheel comprising:
a hub centered about and defining a longitudinal axis, wherein the hub is configured to be freely rotatably fixed in position inside a fluid pipe section;
a first cylindrical rim centered about the hub and the longitudinal axis and spaced a distance apart from the hub, wherein connection between the hub and the first cylindrical rim is limited to a first set of no more than two vanes each having a root attached to the hub and a tip attached to the first cylindrical rim including a second cylindrical rim centered about the hub and the longitudinal axis and spaced radially a distance apart from the first cylindrical rim, wherein the first and second cylindrical rims are concentrically disposed in relation to one another, and including a second vane set extending outwardly from the first cylindrical rim to the second cylindrical rim, wherein a root of each vane of the second vane set is attached to the first cylindrical rim and a tip of each vane of the second vane set is attached to the second cylindrical rim.
2. The turbine wheel of claim 1 , wherein the first vane set is limited to one individual vane.
3. The turbine wheel of claim 1 , including an external vane set extending outwardly from the first cylindrical rim, wherein a root of each vane of the external vane set is attached to the first cylindrical rim and a tip of each vane of the external vane set is not attached to any cylindrical rim.
4. The turbine wheel of claim 1 , wherein a pocket is formed in the first cylindrical rim, and wherein a magnet or a magnetically-permeable ferrous part is disposed within the pocket.
5. The turbine wheel of claim 1 , wherein the hub, the first cylindrical rim, and the first vane set of the turbine wheel are formed as a single-shot, plastic injection molded, homogeneous part.
6. The turbine wheel of claim 5 , wherein the single-shot, plastic injection molded, homogeneous part has a specific gravity at or between 0.9 to 1.0.
7. The turbine wheel of claim 5 , wherein the single-shot, plastic injection molded, homogeneous part is formed from a polypropylene homopolymer.
8. The turbine wheel of claim 1 , wherein the first vane set consists of two individual vanes and the second vane set consists of four individual vanes.
9. The turbine wheel of claim 1 , wherein the first vane set consists of two individual vanes and the second vane set comprises more than two individual vanes.
10. The turbine wheel of claim 1 , wherein the first vane set consists of one individual vane and the second vane set comprises more than one individual vane.
11. The turbine wheel of claim 1 , wherein the first vane set has a lower individual vane count in comparison to the second vane set.
12. The turbine wheel of claim 1 , wherein a pocket is formed in the second cylindrical rim, and wherein a magnet or a magnetically-permeable ferrous part is disposed within the pocket.
13. The turbine wheel of claim 1 , wherein a leading edge of the first cylindrical rim extends a distance in front of a leading edge of the second cylindrical rim.
14. The turbine wheel of claim 1 , wherein the hub, the first and second cylindrical rims, and the first and second vane sets of the turbine wheel are formed as a single-shot, plastic injection molded, homogeneous part.
15. The turbine wheel of claim 1 , including an external vane set extending outwardly from the second cylindrical rim to define an outer radial surface of the turbine wheel.
16. A turbine wheel configured for use in a turbine flow meter, the turbine wheel comprising:
a hub centered about and defining a longitudinal axis, wherein the hub is configured to be freely rotatably fixed in position inside a fluid pipe section;
a first cylindrical rim centered about the hub and the longitudinal axis and spaced a distance apart from the hub;
a first vane set extending outwardly from the hub to the first cylindrical rim, wherein a root of each vane of the first vane set is attached to the hub and a tip of each vane of the first vane set is attached to the first cylindrical rim;
a second cylindrical rim centered about the hub and the longitudinal axis and spaced radially a distance apart from the first cylindrical rim, wherein the first and second cylindrical rims are concentrically disposed in relation to one another;
a second vane set extending outwardly from the first cylindrical rim to the second cylindrical rim, wherein a root of the each vane of the second vane set is attached to the first cylindrical rim and a tip of each vane of the second vane set is attached to the second cylindrical rim.
17. The turbine wheel of claim 16 , wherein the first vane set has a lower individual vane count in comparison to the second vane set.
18. The turbine wheel of claim 17 , including a third vane set extending outwardly from the second cylindrical rim, wherein a root of each vane of the third vane set is attached to the second cylindrical rim and a tip of each vane of the third vane set is not attached to any cylindrical rim.
19. The turbine wheel of claim 18 , wherein a pocket is formed in the second cylindrical rim, and wherein a magnet or a magnetically-permeable ferrous part is disposed within the pocket.
20. The turbine wheel of claim 19 , wherein a leading edge of the first cylindrical rim extends a distance ahead of a leading edge of the second cylindrical rim.
21. The turbine wheel of claim 20 , wherein the turbine wheel is a single-shot, plastic injection molded, homogeneous part.
22. The turbine wheel of claim 16 , wherein the first vane set consists of two individual vanes and the second vane set consists of four individual vanes.
23. The turbine wheel of claim 16 , wherein the first vane set consists of two individual vanes and the second vane set comprises more than two individual vanes.
24. The turbine wheel of claim 16 , wherein the first vane set consists of one individual vane and the second vane set comprises more than one individual vane.
25. A turbine wheel configured for use in a turbine flow meter, the turbine wheel comprising:
a hub centered about and defining a longitudinal axis, wherein the hub is configured to be freely rotatably fixed in position inside a fluid pipe section;
a first cylindrical rim centered about the hub and the longitudinal axis and spaced a distance apart from the hub;
a first vane set extending outwardly from the hub to the first cylindrical rim, wherein a root of each vane of the first vane set is attached to the hub and a tip of each vane of the first vane set is attached to the first cylindrical rim, wherein the first vane set consists of two individual vanes; and
a plastic external vane set extending outwardly from the first cylindrical rim, wherein a root of each vane of the external vane set is attached to the first cylindrical rim and a tip of each vane of the external vane set is not attached to any cylindrical rim wherein the turbine wheel is a single-shot plastic injection molded, homogenous part; wherein a pocket is formed in the first cylindrical rim, and including a magnet or magnetically-permeable ferrous part disposed within the pocket.
26. The turbine wheel of claim 25 , wherein an axle thru-hole is disposed through the hub along the longitudinal axis, and including a turbine shaft disposed through the axle thru-hole.
27. A turbine wheel configured for use in a turbine flow meter, the turbine wheel comprising:
a hub centered about and defining a longitudinal axis, wherein the hub is configured to be freely rotatably fixed in position inside a fluid pipe section;
a first cylindrical rim centered about the hub and the longitudinal axis and spaced a distance apart from the hub;
a first vane set extending outwardly from the hub to the first cylindrical rim, wherein a root of each vane of the first vane set is attached to the hub and a tip of each vane of the first vane set is attached to the first cylindrical rim; and
an external vane set extending outwardly from the first cylindrical rim, wherein a root of each vane of the external vane set is attached to the first cylindrical rim and a tip of each vane of the external vane set is not attached to any cylindrical rim;
wherein the turbine wheel, including the hub, the first cylindrical rim, the first vane set and the external vane set, is a single-shot, plastic injection molded, homogeneous part wherein a pocket is formed in the first cylindrical rim, and wherein a magnet or magnetically-permeable ferrous part is disposed within the pocket.
28. A turbine wheel configured for use in a turbine flow meter, the turbine wheel comprising:
a hub centered about and defining a longitudinal axis, wherein the hub is configured to be freely rotatably fixed in position inside a fluid pipe section;
a first cylindrical rim centered about the hub and the longitudinal axis and spaced a distance apart from the hub;
a first vane set extending outwardly from the hub to the first cylindrical rim, wherein a root of each vane of the first vane set is attached to the hub and a tip of each vane of the first vane set is attached to the first cylindrical rim;
wherein the hub, the first cylindrical rim, and the first vane set of the turbine wheel are formed from a polypropylene homopolymer;
wherein a pocket is formed in the first cylindrical rim; and
a magnet or a magnetically-permeable ferrous part disposed within the pocket;
wherein the turbine wheel including the magnet or the magnetically-permeable ferrous part consists of a specific gravity at or between 0.9 to 1.0.