GB268037A - Improvements in or relating to axial flow hydraulic machines - Google Patents
Improvements in or relating to axial flow hydraulic machinesInfo
- Publication number
- GB268037A GB268037A GB3259925A GB3259925A GB268037A GB 268037 A GB268037 A GB 268037A GB 3259925 A GB3259925 A GB 3259925A GB 3259925 A GB3259925 A GB 3259925A GB 268037 A GB268037 A GB 268037A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotor
- vanes
- whirl
- guide vanes
- constant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D3/00—Axial-flow pumps
- F04D3/005—Axial-flow pumps with a conventional single stage rotor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
- Rotary Pumps (AREA)
Abstract
268,037. Gill, J. H. W. Dec. 24, 1925. Impeller blades; casings; regulating. - In axial-flow hydraulic pumps and other apparatus such as hydraulic transmission elements, the rotor blades or the guide vanes (if any) on either or both sides thereof, or both rotor blades and guide vanes, are so shaped that the linear velocity of whirl imparted to the fluid flowing through the rotor is approximately the same at all radii. The preferred arrangement varies the pitch of the pump rotor blades B, Figs. 15 and 16 in a radial direction so as to secure constant whirl at all radii, this in turn giving, with uniform axial-flow velocity, a constant value at all radii for the absolute direc. tion and speed of outflow from the rotor, which enables the outlet guide vanes D to have the inclination of their edges made uniform from root to tip. Fig. 16 shows the cross-section of a rotor blade B at the boss, at the mid-radius, and at the tip, respectively. The axial inlet guide vanes C have their edges C<2> curved slightly in the direction of rotation of the rotor. In a modification, Fig. 19, each outlet guide vane E is mounted in the casing A so as to be rotatable to the desired inclination and then secured by bolts E<4>. A constant whirl rotor F, Fig. 21, may be mounted so that its axial position between the two sets of vanes C, D may be adjusted. This arrangement may also be used with a true screw rotor in which an approximation to constant whirl conditions is obtained by twisting the radial inlet guide vanes so as to produce a forced feed near the axis and a starved feed near the periphery. In a turbine with a constant whirl rotor K, Fig. 22, the inlet guide vanes H are pivoted and controlled simultaneously by a spider J having slots J<1> within which slide pins J<2> on the ends of arms J<3> carried by the vanes. The vanes H may have curved or inclined edges H<1>, H<2>. The inflow passage containing the vanes H may be inclined to the horizontal, and the axial position of the rotor may be adjustable. A reversible tidal turbine, or a reversible pump, is shown in Fig. 24, comprising a rotor O disposel between two sets of balanced wicket vanes Q, R. A series of tangential passages or a single spiral passage may take the place of the adjustable guide vanes, at the turbine inlet or pump outlet. Fixed vanes T<4>, T<5>, T<6>, Fig. 26, may alternate with rotor blades T, T<1> and may be adjustable as described .above. For hydraulic transmission, Fig. 27, two rotors U, U<1> of the constant whirl type rotate in opposite directions, one being connected to the driving shaft U<2> and acting as a pump, whilst the other is connected to the driven shaft U<3> and acts as a turbine. This arrangement has a general application, the second' rotor performing the functions of the guide vanes under all conditions of flow. When the two oppositely running rotors have different pitch, the desired whirl compensation may be obtained by arranging gearing between the two shafts to give the appropriate speeds. Figs. 28 - - 32 show alternative forms of rotor blades V, V<3>, V<6>, V<7> and shrouding V<2>, V<4>, V<5>. In addition to the radial variation in pitch, the rotor blades may be given axial variation in pitch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3259925A GB268037A (en) | 1925-12-24 | 1925-12-24 | Improvements in or relating to axial flow hydraulic machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3259925A GB268037A (en) | 1925-12-24 | 1925-12-24 | Improvements in or relating to axial flow hydraulic machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB268037A true GB268037A (en) | 1927-03-24 |
Family
ID=10341142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3259925A Expired GB268037A (en) | 1925-12-24 | 1925-12-24 | Improvements in or relating to axial flow hydraulic machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB268037A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1806505A1 (en) * | 2006-01-05 | 2007-07-11 | Hitachi Plant Technologies, Ltd. | Axial flow pump |
GB2426296B (en) * | 2004-02-23 | 2008-10-01 | Baker Hughes Inc | Two phase flow conditioner for pumping gassy well fluid |
WO2017121907A1 (en) * | 2016-01-17 | 2017-07-20 | Sck.Cen | Pump for nuclear applications |
-
1925
- 1925-12-24 GB GB3259925A patent/GB268037A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2426296B (en) * | 2004-02-23 | 2008-10-01 | Baker Hughes Inc | Two phase flow conditioner for pumping gassy well fluid |
EP1806505A1 (en) * | 2006-01-05 | 2007-07-11 | Hitachi Plant Technologies, Ltd. | Axial flow pump |
US8092189B2 (en) | 2006-01-05 | 2012-01-10 | Hitachi Plant Technologies, Ltd. | Axial flow pump |
WO2017121907A1 (en) * | 2016-01-17 | 2017-07-20 | Sck.Cen | Pump for nuclear applications |
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