DE427135C - Fastening of the impeller disks, especially of steam or gas turbines, on their shaft - Google Patents
Fastening of the impeller disks, especially of steam or gas turbines, on their shaftInfo
- Publication number
- DE427135C DE427135C DEA39447D DEA0039447D DE427135C DE 427135 C DE427135 C DE 427135C DE A39447 D DEA39447 D DE A39447D DE A0039447 D DEA0039447 D DE A0039447D DE 427135 C DE427135 C DE 427135C
- Authority
- DE
- Germany
- Prior art keywords
- shaft
- steam
- rings
- fastening
- gas turbines
- 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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/025—Fixing blade carrying members on shafts
Description
Befestigung der Laufradscheiben, insbesondere von Dampf- oder Gasturbinen auf ihrer Welle. Bei Turbinenscheiben treten gelegentlich Scheibenschwingungen auf, welche schon zum Bruch der Scheiben und zur Zerstörung der Turbine geführt haben. Bekanntlich lassen sich die Scheibenschwingungen für gleichmäßig erwärmte oder kalte Scheiben berechnen. Da z. B. in Dampfturbinen der Dampf in den oberen Stufen wesentlich wärmer ist als in den niederen (Temperaturunterschiede bis 3oo° sind möglich), so geht eine Wärmeströmung von den vorderen Scheiben durch die Welle nach den hinteren Scheiben. Infolgedessen sind die Scheiben in - einer Turbine nicht gleichmäßig erwärmt.- Es ist nun schwierig oder fast unmöglich, diese Wärmeunntterschiede in den Scheiben festzustellen oder zu berechnen, da sie sich auch noch bei jeder Belastung ändern. Die Wärmeverschiedenheit in einer Scheibe kann aber ihrem Spannungszustand in dem Maße ändern, daß sie, wenn sie bei gleichmäßiger Erwärmung schwingungsfrei ist, im Betrieb Schwingungen aufweist, die vom Wärmezustand und damit von der Belastung abhängig sind. Es kommt vor, daß bei Leerlauf oder Belastungen, wie sie auf dem Versuchsstand möglich sind, durchaus schwingungsfreie Scheiben bei höheren Belastungen dagegen unzulässige Schwingungen aufweisen.Fastening of the impeller disks, especially of steam or gas turbines on their wave. In turbine disks, disk vibrations occasionally occur, which have already led to the breakage of the disks and the destruction of the turbine. As is well known, the disk vibrations can be uniformly heated or cold Calculate slices. Since z. B. in steam turbines, the steam in the upper stages is essential is warmer than in the lower (temperature differences of up to 300 ° are possible), so a heat flow goes from the front discs through the shaft after the rear discs. As a result the disks in - a turbine aren't evenly heated .-- It is now difficult, or almost impossible, to detect these differences in heat Determine or calculate in the slices, since they are also still in each case Change load. The difference in heat in a pane can, however, be influenced by its state of tension change to the extent that, if they are heated evenly, they will not vibrate is, has vibrations during operation that are caused by the heat condition and thus by the load are dependent. It happens that when idling or under loads like those on the It is possible to use a test stand, quite vibration-free disks at higher loads however, exhibit impermissible vibrations.
Diese Schwierigkeit zu vermeiden, ist Gegenstand der Erfindung. Sie besteht darin, daß die Scheiben zwar in üblicher Weise nicht unmittelbar auf die Welle, sondern auf Zwischenlagen aufgeschrumpft oder aufgepreßt werden, daß aber für die Ringe, Büchsen o. dgl. ein die Wärme schlechter leitender Stoff als -gewöhnlicher Stahl benutzt ist, so daß die Scheibe in ihrer ganzen Ausdehnung eine gleichmäßige Temperatur annimmt, da der Wärmeabfluß nach der Welle hin stark unterbunden ist.The object of the invention is to avoid this difficulty. she consists in the fact that the discs are not directly on the in the usual way Shaft, but are shrunk or pressed onto intermediate layers, but that for the rings, bushings or the like. A material that conducts heat less than usual Steel is used, so that the disc is uniform in its entire extent Temperature assumes, since the heat flow towards the shaft is strongly prevented.
Als brauchbare Baustoffe für solche Zwischenlagen erweisen sich nun hochprozentige Nickel- und Manganlegierungen, die schlechte Wärmeleiter sind. Die aus diesen Stoffen hergestellten Ringe werden nun in ganz der gleichen Weise zur Befestigung der Scheiben angewandt, wie es von gewöhnlichen, die Wärme gut leitenden Stahlringen her bekannt ist.Now turn out to be useful building materials for such intermediate layers high-percentage nickel and manganese alloys, which are poor conductors of heat. the Rings made from these materials are now used in exactly the same way Fixing of the washers applied as it is of ordinary ones, which conducts heat well Steel rings is known ago.
Die Zeichnung zeigt eine derartige Befestigung. Es ist a die Scheibe, b die Welle, ci und c2 sind die Ringe" aus schlecht wärmeleitendem Stoff. Die Ringe und die Scheibe können aufgepreßt oder aufgeschrumpft sein.The drawing shows such an attachment. It is a the disc b the wave, ci and c2 are the rings "made of poorly heat-conducting material. The rings and the disk can be pressed on or shrunk on.
Die Erfindung läßt sich überall. dort anwenden, wo umlaufende Scheiben Wärme aufnehmen.The invention can be used anywhere. Use where there are rotating discs Absorb heat.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA39447D DE427135C (en) | 1923-02-16 | 1923-02-17 | Fastening of the impeller disks, especially of steam or gas turbines, on their shaft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE211448X | 1923-02-16 | ||
DEA39447D DE427135C (en) | 1923-02-16 | 1923-02-17 | Fastening of the impeller disks, especially of steam or gas turbines, on their shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
DE427135C true DE427135C (en) | 1926-03-26 |
Family
ID=25760853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA39447D Expired DE427135C (en) | 1923-02-16 | 1923-02-17 | Fastening of the impeller disks, especially of steam or gas turbines, on their shaft |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE427135C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4147470A (en) * | 1977-01-31 | 1979-04-03 | National Union Electric Corporation | Insulated fan for electric appliance |
US4518315A (en) * | 1981-07-24 | 1985-05-21 | Motoren- Und Turbinen-Union Munchen Gmbh | Arrangement for connecting a ceramic rotor wheel, particularly a turbine rotor wheel of a turbomachine, such as a gas turbine engine, to a metallic shaft |
-
1923
- 1923-02-17 DE DEA39447D patent/DE427135C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4147470A (en) * | 1977-01-31 | 1979-04-03 | National Union Electric Corporation | Insulated fan for electric appliance |
US4518315A (en) * | 1981-07-24 | 1985-05-21 | Motoren- Und Turbinen-Union Munchen Gmbh | Arrangement for connecting a ceramic rotor wheel, particularly a turbine rotor wheel of a turbomachine, such as a gas turbine engine, to a metallic shaft |
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