EP0511517A1 - Dispositif de guidage partitionné - Google Patents

Dispositif de guidage partitionné Download PDF

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Publication number
EP0511517A1
EP0511517A1 EP92105850A EP92105850A EP0511517A1 EP 0511517 A1 EP0511517 A1 EP 0511517A1 EP 92105850 A EP92105850 A EP 92105850A EP 92105850 A EP92105850 A EP 92105850A EP 0511517 A1 EP0511517 A1 EP 0511517A1
Authority
EP
European Patent Office
Prior art keywords
blade
parts
blades
guide device
guiding device
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.)
Granted
Application number
EP92105850A
Other languages
German (de)
English (en)
Other versions
EP0511517B1 (fr
Inventor
Karlheinz Becker
Peter Milla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB AG
Original Assignee
KSB AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KSB AG filed Critical KSB AG
Publication of EP0511517A1 publication Critical patent/EP0511517A1/fr
Application granted granted Critical
Publication of EP0511517B1 publication Critical patent/EP0511517B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the invention relates to a guide device according to the preamble of the main claim.
  • a stator for centrifugal pumps is known from DE-C-260 166, which consists of two symmetrically designed but oppositely directed stator halves. Each stator wheel half is provided with a complete stator blade having a blade start and a blade end. Within a pump housing, the stator halves are arranged so that the blades of one stator half face the channels of the other stator half. Thus, no closed stator channels are formed, but a stator vane channel is formed in the development.
  • This solution offers the advantage of using washers to adapt the width of the stator to the respective impeller width, in that the individual blades protrude more or less deeply into the stator channel.
  • This stator shape could be manufactured in a simple manner and by machining, but it has the disadvantage that it creates noise, vibrations and - based on the current performance conditions - unfavorable efficiency levels within a pump.
  • guide devices have been developed in which one part of the guide wheel is provided with free-standing blades, and one against the free-standing longitudinal sides of the blades in the axial direction In the direction of attachable idler covers, the idler closes and forms closed guide channels.
  • this solution has the disadvantage that it can only be produced by machining or casting technology in the case of large swallowing widths, since otherwise the production outlay becomes uneconomical.
  • they have the disadvantage that considerable effort is required to attach the stator cover to the free-standing blade ends in order to obtain a tight connection due to the pressure conditions prevailing within the stator.
  • the object of the invention is to develop a guiding device which can be machined or cast in a very simple manner and which is provided with a minimum of centering and fitting surfaces. This object is achieved in accordance with the characterizing part of the main claim.
  • at least two blades are divided in length. In the area of their division, the parts of the guide device to be connected are fitted. The remaining blades can alternately be part of the guide device parts and rest sealingly against them.
  • each guide device part of the guide channel has two wall surfaces which stand on one another and enclose an angle between them.
  • the guide channels delimited by blades are formed for a conveying medium.
  • the blades are, as it were, divided in their blade length, the separation point running transversely to the blade length.
  • One embodiment of the invention provides that at least three partial planes are provided between the guide device parts to be connected to one another, two partial planes intersecting the central axis of the guide device and being axially spaced from one another and by the third partial plane running in the direction of the central axis and dividing the blades are connected.
  • the respective free-standing longitudinal sides of the blade parts thus lie sealingly on the opposite guide device part delimiting the blade channel.
  • a further embodiment of the invention provides that the guide device parts are connected to one another by a form-fitting plug-in connection in the area of the blade division.
  • the guide device parts to be connected can be centered by corresponding overlaps in the area of the blade parts to be connected.
  • a further embodiment of the invention provides for this that the part plane dividing the blades has no straight line.
  • An arcuate, S-shaped, Z-shaped, meandering or similarly shaped course of the partial plane of the blades is advantageous. This has the advantage that not only is the two parts centered with respect to one another, but that, due to the part plane profile, an anti-rotation device is also generated. For assembly, it is sufficient to simply plug the parts into one another. Elaborate centering, dowel pins and connecting elements, as were previously required in multi-stage turbomachines, are completely eliminated. When assembling such a turbomachine, the centering and positioning of the individual guide device parts can only be placed in the connection area of the divided blades. In the case of wholly or partially machining, for example by milling forged, pressed or cast raw parts, extremely cost-effective production and assembly are possible.
  • Yet another embodiment of the invention provides that the third partial plane of each blade, which runs in the axial direction and cuts through the blades, is arranged in front of the blade tips of each downstream blade. This makes it possible to manufacture or rework each guide device part, for example, in one clamping and with only one milling tool.
  • this area is also known as the stator inlet or swallowing distance. If the distance between the blades is very small, this channel part could only be produced with narrow, thin end mills and was therefore time-consuming and risky.
  • the sub-plane can be placed in front of the beginning or the end of a shovel for small duct cross-sections. The distance between the beginning or end of the blade and the part plane of the blade is chosen so large that a milling cutter with a large diameter can be easily passed between the blade parts for an inexpensive production and the blade contour can thus be worked out.
  • Subclaims 8 to 12 describe which blades can each be designed to be divisible.
  • a guide device which is used, for example, in multi-stage pumps
  • the entire stator or stage housing package can be plugged into one another.
  • the return blades can be part of the actual guide wheel and part of a downstream or preceding cover part or an intermediate wall.
  • a stage housing which receives a stator and is provided with return blades.
  • Elaborate fitting surfaces and shoulders, which serve for centering, can be completely eliminated. The entire centering of the parts of the guide device to be connected takes place via the parting plane in the area of the blades composed of parts.
  • the example of a guiding device of a turbomachine shown in FIG. 1 shows a stage housing of a multi-stage centrifugal pump.
  • the stage housing (1) is of a pot-shaped design and has in its inward-facing bottom part, which functionally forms a cover part (2) for a downstream stage housing (3), with blade parts (4) of return blades provided with blade starts.
  • Partitions (5, 6) are arranged in these stage housings (1, 3). These have vane parts (7, 8) of the stator blades, which are provided with blade starts on one side.
  • blade parts (9, 10) of the return blades are provided with blade ends. The parting lines between these parts are shown with double line width.
  • the parting planes (A, B) of the return section are arranged at a distance from one another in radial planes.
  • the parting plane (C) divides the return blades into two parts and runs in the axial direction. If required, any other course of the parting plane (C) is also possible.
  • the stage housing (1, 3) are in turn centered on the stator blade parts.
  • blade parts (11) of the stator blades are provided with blade ends.
  • the stage housing (1) is thus centered on the intermediate wall (6) of the subsequent stage housing (3) to prevent rotation.
  • the separating planes (D-E) of the stator are shown with a double line width and also run in radial planes. They are connected to each other by the parting plane (F) that divides the stator blades in their length.
  • FIG. 2 corresponds to a section along line II-II from FIG. 1.
  • the vane parts (8) formed in one piece with the intermediate wall (6) have the vane starts (12) of the actual stator blades.
  • the blade parts (11) provided with the blade ends (13) are part of the step housing (1), not shown here.
  • the dividing plane (F) between the stator blade parts (8, 11) is shown with a double line width. In this exemplary embodiment, it has an S-shaped course which both centers the parts to be joined together and at the same time secures them against rotation. This form-fitting connection can also have any other suitable course which ensures the same function.
  • the vane channels (14) of the stator are formed between the vane parts (8, 11), which are distributed along the circumference.
  • the blade parts (9) are an integral part of the intermediate wall (5) and form the parts of the return blades provided with blade ends (15).
  • the blade parts (4) shown here, which have blade starts (16), are an integral part of the step housing (1) and are mounted inside the same and in the base part (2).
  • the dividing plane (C), which runs in the axial direction and has an S-shaped course, is again with double line width shown.
  • the parts to be joined are centered and secured against rotation within the parting plane (C).
  • the arrangement of the blade parts on the guide device parts shown in the figures is not mandatory. Any other arrangement of the blade parts is also possible, which can be put together to form a uniform whole. Even in the case of a guide device designed for axial flow, the blades can be divided in the manner according to the invention.
  • the vane parts on the guide device part carrying them, after which a vane part with a vane end alternately follows a vane part with a vane end. This depends on the individual case and the shape of the blade channels. If an assignment of the parts to be joined to one another is required in a specific position, this can be brought about by a different design of one of the parting planes (C) or (F) or a special arrangement of blade parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Road Signs Or Road Markings (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
EP92105850A 1991-04-27 1992-04-04 Dispositif de guidage partitionné Expired - Lifetime EP0511517B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4113830 1991-04-27
DE4113830A DE4113830A1 (de) 1991-04-27 1991-04-27 Geteilte leitvorrichtung

Publications (2)

Publication Number Publication Date
EP0511517A1 true EP0511517A1 (fr) 1992-11-04
EP0511517B1 EP0511517B1 (fr) 1995-09-06

Family

ID=6430507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105850A Expired - Lifetime EP0511517B1 (fr) 1991-04-27 1992-04-04 Dispositif de guidage partitionné

Country Status (3)

Country Link
EP (1) EP0511517B1 (fr)
AT (1) ATE127573T1 (fr)
DE (2) DE4113830A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3306104A4 (fr) * 2015-05-29 2019-02-13 Nidec Corporation Soufflante et aspirateur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443362A (en) * 1994-03-16 1995-08-22 The Hoover Company Air turbine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE260166C (fr) *
FR661079A (fr) * 1928-09-26 1929-07-20 Aube directrice de conformation hélicoïdale pour pompes centrifuges et pour condenseurs
CH221387A (de) * 1940-12-30 1942-05-31 Diebold Geb Mehrstufige Zentrifugalpumpe.
FR2185222A5 (fr) * 1972-05-19 1973-12-28 Neyrpic Creusot Loire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE858284C (de) * 1943-02-27 1952-12-04 Maschf Augsburg Nuernberg Ag Abgedecktes Laufrad fuer Kreiselradmaschinen
US3737247A (en) * 1971-04-12 1973-06-05 Garrett Corp Composite nozzle
DD95761A1 (fr) * 1972-03-16 1973-02-12

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE260166C (fr) *
FR661079A (fr) * 1928-09-26 1929-07-20 Aube directrice de conformation hélicoïdale pour pompes centrifuges et pour condenseurs
CH221387A (de) * 1940-12-30 1942-05-31 Diebold Geb Mehrstufige Zentrifugalpumpe.
FR2185222A5 (fr) * 1972-05-19 1973-12-28 Neyrpic Creusot Loire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3306104A4 (fr) * 2015-05-29 2019-02-13 Nidec Corporation Soufflante et aspirateur

Also Published As

Publication number Publication date
ATE127573T1 (de) 1995-09-15
DE59203519D1 (de) 1995-10-12
DE4113830A1 (de) 1992-10-29
EP0511517B1 (fr) 1995-09-06

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