CH92483A - Steam or gas turbine with a relief device with a stepped piston to counter the axial thrust. - Google Patents
Steam or gas turbine with a relief device with a stepped piston to counter the axial thrust.Info
- Publication number
- CH92483A CH92483A CH92483DA CH92483A CH 92483 A CH92483 A CH 92483A CH 92483D A CH92483D A CH 92483DA CH 92483 A CH92483 A CH 92483A
- Authority
- CH
- Switzerland
- Prior art keywords
- steam
- stepped piston
- gas turbine
- counter
- axial thrust
- Prior art date
Links
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
- F01D3/04—Machines or engines with axial-thrust balancing effected by working-fluid axial thrust being compensated by thrust-balancing dummy piston or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Description
Dampf= oder Gasturbine nnit einer eineu Stufeukolbeu aufweisenden EutlaStungs- vorrichtung gegen den Achsialschub. Vorliegende Erfindung betrifft eine Dampf oder Gasturbine mit einer einen Stufenkolben aufweisende Entlastungsvorrichtung.
Es ist bekannt, für eine solche Vorrich- tung einen abgestuften Kolben zii benützen, von welchem jede Stufe den achsialen, vorn Treibmittel herrührenden Schub des ent sprechenden Troininelteils und seiner Schau felung entlastet. Derjenige Entlastungskolben, welcher gegen Vakuum abdichtet, entlastet den Niederdruckteil und erhält deshalb einen grossen Durchmesser. Dies bringt jedoch ver schiedene Nachteile mit sich.
Ein grosser Abdichtungsdurchmesser ist vor allein kon struktiv unbequem und kann die Betriebs sicherheit beeinträchtigen. Ausserdem gibt er zii grossen Dampfverlusten Veranlassung, die besonders deshalb ins Gewicht fallen, weil das abzudichtende Gefälle meist gross ist. und weil ausserdem der entweichende Dampf nicht wie der durch den ersten Kolben ent weichende in die Schaufelung, sondern unmittelbar in den Abdampfraum gelangt.
bemüh vorliegender Erfindung wird nun durch die voni Dainpfstroin zuerst berührte Entlastungsfliiche des Stufenkolbens ein die Gegenkräfte ini beschaufelten Teil überwie gender @egi#nscliub erzeugt. derart, dati die zweite Stufe des Entlastungskolbens, -welche gegen den Abdainpfdruck abdichtet,
mit einem vei#liiiltiiismäf.)ig kleinen Durchmesser ausgeführt werden kann.
Die Zeichnung zeigt ein Ausführungsbei- spiel des 7@rfindungsgegenstandes, in welchem eine vereinigte CTeschwindigl,#eits- und L'ber- drucliturbinc dargestellt ist. Mit a. ist das Geschwindigheitsr ad, mit G und c der Über druckteil bezeichnet.
Der Durchmesser des Labyrintlikolbens (L wird so gewählt, dass durch die vom Dampfstrom zuerst berührte Entlastungsfläche g nicht nur der ganze Aclisialschub der Lbei#di-uckteile L und c der Trommel aufgenommen -wird, sondern dass ein Schub nach links entsteht,
der es er- möglicht. dein zweiten Entlastungskolben e mit verhültnismü.ssig kleinem Durchmesser auszuführen. Der Raurar h zwischen e und<I>d</I> steht durch die Leitung f in Verbindung mit dem Raume zwischen den Teilen b und c.
Die beiden Kolben d und e können so be messen werden, dah vollständige Entlastung vorhanden ist, die bei gleichmäläiger @lnde- rung des Ein- und des Austrittsdruckes der Turbine bestehen bleibt.
Steam or gas turbine with a load-bearing device with a stage against axial thrust. The present invention relates to a steam or gas turbine with a relief device having a stepped piston.
It is known to use a stepped piston zii for such a device, from which each step relieves the axial thrust, originating from the propellant, of the corresponding tunnel part and its blade. The relief piston that seals against vacuum relieves the low-pressure part and therefore has a large diameter. However, this entails various disadvantages.
A large sealing diameter is primarily structurally uncomfortable and can impair operational safety. It also gives rise to large steam losses, which are particularly significant because the gradient to be sealed is usually large. and because, in addition, the escaping steam does not get into the shovel like the one escaping through the first piston, but directly into the exhaust steam space.
In accordance with the present invention, the relief area of the stepped piston first touched by Dainpfstroin generates a part that is predominantly the counterforces in the bladed part. in such a way that the second stage of the relief piston, which seals against the evaporation pressure,
with a vei # liiiltiiismäf.) ig small diameter.
The drawing shows an exemplary embodiment of the subject of the invention, in which a combined CTeschwindigl, # eits- and L'berdrucliturbinc is shown. With a. is the speed wheel, G and c denote the overprinted part.
The diameter of the labyrinth piston (L is chosen in such a way that the relief surface g first touched by the steam flow not only absorbs the entire aclisial thrust of the l
that makes it possible. Make your second relief piston e with a relatively small diameter. The space h between e and <I> d </I> is in communication with the space between parts b and c through line f.
The two pistons d and e can be dimensioned in such a way that there is complete relief, which remains when the inlet and outlet pressure of the turbine change evenly.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE76796X | 1914-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH92483A true CH92483A (en) | 1922-01-02 |
Family
ID=5637592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH92483D CH92483A (en) | 1914-05-16 | 1920-07-10 | Steam or gas turbine with a relief device with a stepped piston to counter the axial thrust. |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT76796B (en) |
| CH (1) | CH92483A (en) |
| GB (1) | GB148813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685236A (en) * | 2021-08-23 | 2021-11-23 | 华能铜川照金煤电有限公司 | Balance piston device for single-cylinder single-row counter-pressure steam turbine with multiple speed stages |
-
1915
- 1915-04-22 AT AT76796D patent/AT76796B/en active
-
1920
- 1920-07-10 GB GB2064920A patent/GB148813A/en not_active Expired
- 1920-07-10 CH CH92483D patent/CH92483A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685236A (en) * | 2021-08-23 | 2021-11-23 | 华能铜川照金煤电有限公司 | Balance piston device for single-cylinder single-row counter-pressure steam turbine with multiple speed stages |
Also Published As
| Publication number | Publication date |
|---|---|
| AT76796B (en) | 1919-06-10 |
| GB148813A (en) | 1921-08-25 |
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