GB875412A - Improvements in or relating to axial flow turbines or compressors - Google Patents
Improvements in or relating to axial flow turbines or compressorsInfo
- Publication number
- GB875412A GB875412A GB1851459A GB1851459A GB875412A GB 875412 A GB875412 A GB 875412A GB 1851459 A GB1851459 A GB 1851459A GB 1851459 A GB1851459 A GB 1851459A GB 875412 A GB875412 A GB 875412A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- serrations
- blade
- spacers
- gate
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/3046—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses the rotor having ribs around the circumference
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
875,412. Turbine blade fixings. BRISTOL SIDDELEY ENGINES Ltd. May 30, 1960 [May 30, 1959], No. 18514/59. Class 110 (3). The invention relates to axial flow turbines or compressors of the kind in which the rotor disc 12 or blade supporting member of the stator has undercut circumferentially extending serrations 13 arranged to co-operate with complementary undercut serrations in the roots of blades A, B, C carried thereby, the serrations in the rotor disc or stator member being interrupted by a radially extending gap 14 forming a gate providing radial access for the blades to and from the circumferentially extending serrations. There are three types of blades A, B, C provided. The blades A are positioned in abutment with one another around most of the periphery of the rotor and the blades B, C are arranged in pairs around the remainder of the periphery in the vicinity of the gate. The circumferential width of the gate 14 is smaller than the circumferential width of each blade root and the serrations of each root are relieved at 16, 17 to enable the blade to be inserted or removed radially through the gate 14. The roots of the blades A, C are of the same circumferential width and those of the blades B of thinner circumferential width. This enables the blades to be moved along the serrations so as to leave sufficient room for the insertion or removal of the last blades C10, Fig. 4, through the gate. The circumferential spaces between the blades B9, C10, after the insertion of the last blade, is reduced by spacing the blades around the disc between the blades A0, A11 and inserting U-shaped spacers 18, 18<SP>1</SP>. The circumferential width of a spacer is such that together with a blade root B it equals the circumferential width of a blade A or C. The inner edges of the limbs of the U are arranged to embrace the serrations 13 so that the spacers are located axially but are not undercut so that the spacers may be withdrawn or inserted radially without having to be moved to the gate 14. Axially extending slots 19, 19<SP>1</SP> cut in the periphery rotor are engaged by the spacers to prevent circumferential movement of the spacers. The spacers 18, 18<SP>1</SP> are prevented from moving radially outwards by locking members 21 of substantially T-section. The cross limbs of each T engage slots 22, 23 in the adjacent faces of the spaced roots B and C. One of the blade roots adjacent each locking member 21 has a depression 24 into which the thinned section 25 of each locking member may be deformed to prevent axial movement of the locking member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1851459A GB875412A (en) | 1959-05-30 | 1959-05-30 | Improvements in or relating to axial flow turbines or compressors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1851459A GB875412A (en) | 1959-05-30 | 1959-05-30 | Improvements in or relating to axial flow turbines or compressors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB875412A true GB875412A (en) | 1961-08-16 |
Family
ID=10113738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1851459A Expired GB875412A (en) | 1959-05-30 | 1959-05-30 | Improvements in or relating to axial flow turbines or compressors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB875412A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4730984A (en) * | 1986-09-08 | 1988-03-15 | Ortolano Ralph J | Bladed rotor structure having bifurcated blade roots |
US4781532A (en) * | 1985-06-28 | 1988-11-01 | Bbc Brown, Boveri & Company, Ltd. | Blade retention feature for saddle fir tree root blades of turbo machines and method of using same |
US4936749A (en) * | 1988-12-21 | 1990-06-26 | General Electric Company | Blade-to-blade vibration damper |
-
1959
- 1959-05-30 GB GB1851459A patent/GB875412A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4781532A (en) * | 1985-06-28 | 1988-11-01 | Bbc Brown, Boveri & Company, Ltd. | Blade retention feature for saddle fir tree root blades of turbo machines and method of using same |
US4730984A (en) * | 1986-09-08 | 1988-03-15 | Ortolano Ralph J | Bladed rotor structure having bifurcated blade roots |
US4936749A (en) * | 1988-12-21 | 1990-06-26 | General Electric Company | Blade-to-blade vibration damper |
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