AT35965B - Sealing device to reduce gap losses in centrifugal pumps and fans. - Google Patents
Sealing device to reduce gap losses in centrifugal pumps and fans.Info
- Publication number
- AT35965B AT35965B AT35965DA AT35965B AT 35965 B AT35965 B AT 35965B AT 35965D A AT35965D A AT 35965DA AT 35965 B AT35965 B AT 35965B
- Authority
- AT
- Austria
- Prior art keywords
- fans
- sealing device
- centrifugal pumps
- gap losses
- reduce gap
- Prior art date
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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
<Desc/Clms Page number 1>
Abdichtungseinrichtung zur Verringerung von Spaltverluste bei Schleuderpumpen und Ventilatoren.
Die Erfindung besteht in der Anordnung schraubenförmiger Nuten auf den konischen Dichtungs- bezw. Laufflächen des Laufrades. Die Konizität der Laufflächen ist ebenso wie die Steigung der schraubenförmigen Nuten von der Druckdifferenz zwischen dem äusseren und inneen Ringraum, vor und hinter dem Laufrad, abhängig. Die Abdichtung wird hiebei nicht b) oss durch die Wirkung der an sich zu Dichtungszwecken bekannten, schraubenförmigen Nuton bewirkt, sondern hauptsächlich durch die Zentrifugalkraft, die infolge der Konizität dor Laufflächen, mithin durch das Anwachsen der Durchmesser der Xutengänge hervorgerufen wird.
Die Erfindung ist in der Zeichnung in zwei Ausführungsbeispielen veranschaulicht. Das Laufrad n (Fig. ! und 2) oder mehrere Laufräder sind auf die Welle w auf-
EMI1.1
um Vertuste zu vermeiden, gegeneinander gut abgedichtet werden müssen.
Diese Abdichtung wird durch eine nach Art einer Pumpe wirkende Anordnung erreicht, die im wesentlichen darin besteht, dass die mit schraubenförmigen Nuten c versehenen, äusseren (Fig.] und 3) oder inneren (Fig. 2 und 4) Dichtungsflächen der rotierenden, ringförmigen Laufradansätze f und d konisch ausgebildet werden. Je nach der Grösse der Druckdifferenz zwischen den Ringräumen 1 und 2, 4 und 3 in Fig. 1 oder zwischen den Ringräumen 1 und 2, und 1 in Fig. 2 wird die Steigung der Schraubengänge und das MassderKonizitätbestimmt.
Durch die Rotation der schraubenförmigen Nuten wird eine Strömung vom Anfang 'h' 'Schraubennut gegen ihr Ende erzeugt und die Nut wirkt daher nach Art einer Schleuderpumpe, wobei der erzeugte Druck umso höher ist, je grösser die Konizität der Ansätze und die Steigung der Schraubennut ist. Die Zentrifugalkraft, die infolge der Konizität der
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wird, wächst mit dem Quadrate des Halbmessers der zunehmenden Nutengänge, wodurch on besseres und zuverlässigeres Abdichten als bei den bekannten Anordnungen von Schraubennuten auf zylindrischen Laufflächen erzielt wird.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Sealing device to reduce gap losses in centrifugal pumps and fans.
The invention consists in the arrangement of helical grooves on the conical sealing respectively. Running surfaces of the impeller. The conicity of the running surfaces, like the pitch of the helical grooves, is dependent on the pressure difference between the outer and inner annulus, in front of and behind the impeller. The sealing is not caused b) oss by the action of the screw-shaped nuton known per se for sealing purposes, but mainly by the centrifugal force, which is caused by the conicity of the running surfaces, thus by the increase in the diameter of the ducts.
The invention is illustrated in the drawing in two exemplary embodiments. The impeller n (Fig.! And 2) or several impellers are mounted on the shaft w
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in order to avoid losses, they must be well sealed against each other.
This sealing is achieved by an arrangement acting like a pump, which essentially consists in the fact that the outer (Fig. 3) or inner (Fig. 2 and 4) sealing surfaces of the rotating, annular impeller lugs provided with helical grooves c f and d are conical. Depending on the size of the pressure difference between the annular spaces 1 and 2, 4 and 3 in Fig. 1 or between the annular spaces 1 and 2, and 1 in Fig. 2, the pitch of the screw threads and the degree of conicity is determined.
The rotation of the helical grooves creates a flow from the beginning 'h' 'helical groove towards its end and the groove therefore acts like a centrifugal pump, the pressure generated being higher, the greater the conicity of the lugs and the pitch of the screw groove . The centrifugal force resulting from the conicity of the
EMI1.2
grows with the square of the radius of the increasing grooves, whereby a better and more reliable sealing is achieved than with the known arrangements of screw grooves on cylindrical running surfaces.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT35965T | 1908-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT35965B true AT35965B (en) | 1909-01-25 |
Family
ID=3552697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT35965D AT35965B (en) | 1908-02-04 | 1908-02-04 | Sealing device to reduce gap losses in centrifugal pumps and fans. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT35965B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2936715A (en) * | 1955-11-14 | 1960-05-17 | Thompson Ramo Wooldridge Inc | Seal assembly |
US3228342A (en) * | 1963-11-13 | 1966-01-11 | Barnes Mfg Co | Impeller seal for a centrifugal pump |
US3273809A (en) * | 1963-04-22 | 1966-09-20 | Bauer Bros Co | Refiner seal |
US4037985A (en) * | 1976-05-20 | 1977-07-26 | Worthington Pump, Inc. | Flushing liquid system for the wearing ring in centrifugal pumps and the wearing ring assembly and wearing ring for use therein |
-
1908
- 1908-02-04 AT AT35965D patent/AT35965B/en active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2936715A (en) * | 1955-11-14 | 1960-05-17 | Thompson Ramo Wooldridge Inc | Seal assembly |
US3273809A (en) * | 1963-04-22 | 1966-09-20 | Bauer Bros Co | Refiner seal |
US3228342A (en) * | 1963-11-13 | 1966-01-11 | Barnes Mfg Co | Impeller seal for a centrifugal pump |
US4037985A (en) * | 1976-05-20 | 1977-07-26 | Worthington Pump, Inc. | Flushing liquid system for the wearing ring in centrifugal pumps and the wearing ring assembly and wearing ring for use therein |
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