AT29976B

AT29976B - Device for regulating the axial thrust in multi-stage centrifugal pumps or blowers with a symmetrical group arrangement of the paddle wheels.

Info

Publication number: AT29976B
Authority: AT
Inventors: Enno Dr Ing Heidebroek
Original assignee: Enno Dr Ing Heidebroek
Priority date: 1906-12-10
Filing date: 1906-12-10
Publication date: 1907-09-25

Description

  

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   Die Verringerung oder Verstärkung des achsialen Schubes kann also durch einfache Regelung der an die Öffnungen 9 und, 10 angeschlossenen Ventile in jeder beliebigen 
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 höherem Druck stehenden   Rädergruppe   (Fig.   3),   so kann man umgekehrt durch   S,   7 und 12 die rechte Schaufelradkammer einem höheren Druck aussetzen, als in ihr sonst herrschen würde, und dadurch auf dieses Rad einen grösseren Druck ausüben. Der Kanal 4 (Fig, 3), der an das im   Strömungasinne   letzte Leitrad der Pumpe anschliesst, hat bekanntlich den höchsten Druck.

   Diesen leitet man durch das kleine Röhrchen 15, das mit einem Regulierventil 16 versehen ist, in den Kanal 9 und von hier in den Teil 7 der Mittolkammer, dessen Bohrungen 12 mit der rechten Schaufelradkammer in Verbindung stehen. Öffnet man nun das Regulierventil, so tritt der Druck der vierten Stufe hinter das Rad der zweiten und bewirkt hier einen wesentlichen Achsialschub. Dies ist von Vorteil bei vertikalen Pumpen, wo man unter Umständen einen bestimmten Schub braucht, um das Gewicht der rotierenden Teile aufzuheben, und auch in jenen Fällen, wo ungerade   Stufenzahlen erforderlich sind,   also z. B. links von der Mitte drei, rechts nur zwei Stufen liegen. 
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   The reduction or amplification of the axial thrust can thus be achieved by simple regulation of the valves connected to the openings 9 and 10 in any desired
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 higher pressure wheel group (Fig. 3), you can, conversely, through S, 7 and 12, expose the right paddle wheel chamber to a higher pressure than would otherwise prevail in it, and thereby exert a greater pressure on this wheel. The channel 4 (Fig, 3), which connects to the last stator of the pump in the direction of the flow, is known to have the highest pressure.

   This is led through the small tube 15, which is provided with a regulating valve 16, into the channel 9 and from here into the part 7 of the central chamber, the bores 12 of which are connected to the right-hand paddle wheel chamber. If you now open the regulating valve, the pressure of the fourth stage occurs behind the wheel of the second and here causes a substantial axial thrust. This is an advantage with vertical pumps, where you may need a certain amount of thrust to lift the weight of the rotating parts, and also in those cases where uneven numbers of stages are required, e.g. B. three steps to the left of the center, two steps to the right.
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Claims

1. Device for regulating the axial thrust in multi-stage centrifugal pumps or blowers with a symmetrical group arrangement of the paddle wheels, characterized in that two chambers (7 and 8) are switched on between the two paddle wheel groups, which on the one hand connect to the outside air through controllable openings (channels) , on the other hand, each are individually connected to one of the adjacent impeller chambers.

2. Centrifugal pump according to claim l, characterized in that the two chambers (7 and 8) are provided in a hollow body (7) arranged between the two groups of impellers.

3. centrifugal pump according to claims 1 and 2, characterized in that one EMI2.3 with the one chamber (7) is connected, for the purpose of the upright arrangement of the pump that of the higher wheel group. to be able to use extracted pressurized water or pressurized gas to lift the weight of the rotating parts