US1526815A - Elastic-fluid turbine - Google Patents
Elastic-fluid turbine Download PDFInfo
- Publication number
- US1526815A US1526815A US727149A US72714924A US1526815A US 1526815 A US1526815 A US 1526815A US 727149 A US727149 A US 727149A US 72714924 A US72714924 A US 72714924A US 1526815 A US1526815 A US 1526815A
- Authority
- US
- United States
- Prior art keywords
- buckets
- combination
- elastic
- bucket
- fluid turbine
- 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 - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
Definitions
- GLENN B WARREN, OF SCHENECTADY, NEW YORK, ASSIGNOB TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
- his ap lication is a division of my apm plication gen N 0. 682,325, filed December
- the buckets in the last few stages become quite long which means that there is considerable difference in peripheral s eed between the roots of the buckets and t eir tips;
- the result is that if in an impulse turbine the central portions of the buckets are running at a speed correct for most efficiently extracting the energy from the elastic fluid isuing from the nozzle then the root ortions are running too slow for highest e ciency and the tip portions are running too fast for highest eificiency.
- the object of my invention is to provide an improved means for overcoming this difiiculty due to the difference in speed between the roots and the tips of long buckets whereby better efliciency will be obtained.
- Fig. 1 is a radial sectional view through a nozzle-bucket combination indicated at 9.
- the nozzles receive elastic fluid from bucket row 4 and deliver it to bucket row 5.
- the construction of the buckets of the nozzle-bucket combination comprising nozzles 7 and buckets 5 is such that the radially inner portion of the combination operates as an impulse combination and changes toward the radially outer portion until at the outer portion the combination operates partially or wholly as a reaction combination the change being gradual from the one to the other. This is accomplished by varying the exit angle of the buckets from their inner ends to their outer ends, the inner ends having an exit angle 1) as indicated in Fig. 2 and the outer ends having an exit angle 6 minus an amount y, as shown in Fig. 3.
- the nozzle angle a is shown as remaining constant.
Description
Feb. 17, 1925.
G. B. WA RFEEN ELASTIC FLUID TURBINE Original Filed Dec. 22, 1925 11 lm m if mw. t GDMMLH mm m 1 H 6 Patented Feb. 17, 192.5.
umreo STATES PATIENT ornce:
GLENN B. WARREN, OF SCHENECTADY, NEW YORK, ASSIGNOB TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
ELASTIC-FLUID TURBINE.
Original application filed December 22, 1928, Serial No. 682,325. Divided and this application filed July 21, 1924. Serial No. 727,149.
To all whom it may concern:
Be it known that I, GLENN B. WARREN, a citizen of the United States, residing at Schenectady, in the county of-Schenectady,
State of New York, have invented certain new and useful Improvements in Elastic- Fluid Turbines, of which the following is a s ecification.
his ap lication is a division of my apm plication gen N 0. 682,325, filed December In building high speed, large capacity turbines, the buckets in the last few stages become quite long which means that there is considerable difference in peripheral s eed between the roots of the buckets and t eir tips; The result is that if in an impulse turbine the central portions of the buckets are running at a speed correct for most efficiently extracting the energy from the elastic fluid isuing from the nozzle then the root ortions are running too slow for highest e ciency and the tip portions are running too fast for highest eificiency.
The object of my invention is to provide an improved means for overcoming this difiiculty due to the difference in speed between the roots and the tips of long buckets whereby better efliciency will be obtained.
In the design of elastic fluid turbines,.it has been found that in order to absorb the same quantity of energy from an elastic fluid a pure reaction combination of nozzle and bucket must run at a speed about 40% greater than a corresponding impulse combination. This means that 1f the root end of a bucket is running at about the right speed to operate as an impulse bucket, the tip end would be running at 'a speed adapted 40 for either total or partial reaction operation.
In carrying out my invention, I take advantage of this fact, and according to my invention in the case of long buckets I so shape the buckets that the fluid passages of the 5 nozzle-bucket combination operate as an impulse combination at their inner or root ends and as either a partial or total reaction combination at their outer or tip ends. According to the embodiment of the invention 5 illustrated in this application, the" above referred to result is accomplished by so constructing the buckets as to give a. smaller exit angle at the radially outer ends or tips of the buckets than at their radially inner ends or roots.
In the drawing Fig. 1 is a radial sectional view through a nozzle-bucket combination indicated at 9. The nozzles receive elastic fluid from bucket row 4 and deliver it to bucket row 5. The construction of the buckets of the nozzle-bucket combination comprising nozzles 7 and buckets 5 is such that the radially inner portion of the combination operates as an impulse combination and changes toward the radially outer portion until at the outer portion the combination operates partially or wholly as a reaction combination the change being gradual from the one to the other. This is accomplished by varying the exit angle of the buckets from their inner ends to their outer ends, the inner ends having an exit angle 1) as indicated in Fig. 2 and the outer ends having an exit angle 6 minus an amount y, as shown in Fig. 3. The nozzle angle a is shown as remaining constant.
Since the outer ends of the buckets'have a certain amount of reaction there is of course, some drop in pressure across them and to limit the leakage I provide suitable packing means as indicated at 10. At 11 is indicated the usual diaphragm packing.
By my invention I. provide a nozzlebucket combination which takes care of the difference in speed between the roots and the tips of the buckets "and thereby gives better efficienc for the combination than has been obtained heretofore. It will be understood that I am using the term nozzle in a. broad sense and intend toinclude thereby any stationary fluid directing element.
What I claim as new and desire to secure partial reaction at the outer portion, the by Letters Patent of the United States, is change being made commen. urate Wivu the 10 In an elastic fluid turbine, a nozzle-bucket difl'erence in speed at which the radially combination wherein the exitangle of the' inner and outer portions of the buckets r0- 5 buckets decreases from the roots of the bucktate.
ets to their tips by an amount such that the In witness whereof, I have hereunto set combination changes from impulse opermy hand this 18th (la of July, 1924. ation at the radially inner portion to at least GLE N B. WARREN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US727149A US1526815A (en) | 1923-12-22 | 1924-07-21 | Elastic-fluid turbine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US682325A US1526814A (en) | 1923-12-22 | 1923-12-22 | Elastic-fluid turbine |
US727149A US1526815A (en) | 1923-12-22 | 1924-07-21 | Elastic-fluid turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
US1526815A true US1526815A (en) | 1925-02-17 |
Family
ID=27102871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US727149A Expired - Lifetime US1526815A (en) | 1923-12-22 | 1924-07-21 | Elastic-fluid turbine |
Country Status (1)
Country | Link |
---|---|
US (1) | US1526815A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3652182A (en) * | 1970-04-01 | 1972-03-28 | Mikhail Efimovich Deich | Turboseparator for polyphase fluids and turbine incorporating said turboseparator |
US5249922A (en) * | 1990-09-17 | 1993-10-05 | Hitachi, Ltd. | Apparatus of stationary blade for axial flow turbine, and axial flow turbine |
-
1924
- 1924-07-21 US US727149A patent/US1526815A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3652182A (en) * | 1970-04-01 | 1972-03-28 | Mikhail Efimovich Deich | Turboseparator for polyphase fluids and turbine incorporating said turboseparator |
US5249922A (en) * | 1990-09-17 | 1993-10-05 | Hitachi, Ltd. | Apparatus of stationary blade for axial flow turbine, and axial flow turbine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2110679A (en) | Elastic fluid turbine | |
US1749528A (en) | Blading for reaction turbines | |
US1689735A (en) | Labyrinth gland construction | |
US2225769A (en) | Turbine blade | |
US1526815A (en) | Elastic-fluid turbine | |
US1488582A (en) | Elastic-fluid turbine | |
US1670071A (en) | Shaft packing | |
US1548613A (en) | Elastic-fluid turbine | |
US1526814A (en) | Elastic-fluid turbine | |
US3055634A (en) | Steam turbines | |
US2651495A (en) | Turbine inlet structure | |
US1999739A (en) | Removable packing strip | |
US1720729A (en) | Blade fastening | |
US1597467A (en) | Turbine blading | |
US2332322A (en) | Elastic fluid turbine arrangement | |
US1493266A (en) | Elastic-fluid turbine | |
US737042A (en) | Wheel or disk for steam-engines. | |
US1475212A (en) | Elastic-fluid turbine | |
US1698327A (en) | Elastic-fluid turbine | |
US1353710A (en) | Blade or vane for steam-turbines | |
US2269235A (en) | Multistage elastic fluid turbine | |
US2300758A (en) | Blading and balancing piston arrangement | |
US2401073A (en) | Turboblade fastening | |
US1542453A (en) | Marine turbine | |
US1375075A (en) | gaumann |