WO2013050031A1 - Kreiselpumpe für feststoffe enthaltende flüssigkeiten und spaltabdichtung - Google Patents
Kreiselpumpe für feststoffe enthaltende flüssigkeiten und spaltabdichtung Download PDFInfo
- Publication number
- WO2013050031A1 WO2013050031A1 PCT/DE2012/100314 DE2012100314W WO2013050031A1 WO 2013050031 A1 WO2013050031 A1 WO 2013050031A1 DE 2012100314 W DE2012100314 W DE 2012100314W WO 2013050031 A1 WO2013050031 A1 WO 2013050031A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- sealing element
- arrangement according
- sealing
- radrückenraum
- 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
-
- 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
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
Definitions
- the invention relates to a centrifugal pump with a bearing on one side impeller for the promotion of solids containing liquids and an arrangement for sealing a gap in such a centrifugal pump. It refers to, but is not limited to, preferably a solution for centrifugal pumps for sewage production, that is, for the promotion of contaminated with solids water.
- the gaps can become clogged, so that the impeller is blocked, or it can also lead to an immediate blockage of the drive shaft. As a result, it comes to malfunction and not infrequently to severe damage or even to a complete destruction of the pump. Corresponding damage must be due to elaborate maintenance and repair respectively
- centrifugal pump represents the real problem with regard to the conveyance of liquids contaminated with solid contaminants. Because, owing to the pressure gradients in the actual pump, the conveyed liquid is in the range of the highest pressure across the gap sucked in between the impeller back and pressure cover ("suction port") and finds in the lowest pressure zone of the gap again an exit point
- DE 296 19 742 U1 discloses a centrifugal pump with a seal arrangement for the gap formed in the wheel back space of the pump.
- a freely movable elastic sealing element is arranged within the gap between two rigid elements, of which a first is connected to the impeller rear wall and a second with a arranged in the pump housing diffuser.
- the sealing element with respect to the latter rigid element at a distance and is pressed by the pressure of the pumped by the pump liquid in a frictional engagement against a surface of the other, moving with the impeller rigid element.
- the object of the invention is to avoid the disadvantages described above.
- a braid formation and settling of impurities in the gap region of the Rannenraums serving to promote solids containing centrifugal pump with a cantilevered impeller are reliably prevented, so that a very long, trouble-free operation of the corresponding pump, in particular when used as a sewage pump, is possible.
- a correspondingly designed centrifugal pump and an arrangement for the gap sealing of such a centrifugal pump must be provided.
- centrifugal pump having the features of patent claim 1 and an arrangement for gap sealing according to claim 2.
- Advantageous training or further education are through the
- fluid consists of a pump housing and an impeller mounted on a rotatively driven shaft in the pump housing and thus movable, mounted on one side.
- the pump housing has a media inlet opening and a media outlet opening. It encloses a flow space with a suction on one of the
- the invention is therefore based on the consideration that it is possible, the gap to the wheel back cavities, deviating from the known from the prior art solutions to completely seal against mass transfer from the pressure range of the flow space in the Rarierraum, if at the same time for ventilation Venting of Ra07raums and thus, with regard to any resulting air or gas bubbles, for a pressure equalization to the pressure range of the flow space down care is taken.
- a Zopf Struktur is not counteracted by targeted generation of this allegedly avoiding, turbulent flow in Rarierraum, but by a sealing solution, which, as known from the prior art, only serves to a drive shaft for To protect the impeller driving motor, oil chambers or the like before the penetration of the conveyed medium or funded liquid. It is not only a gap reduction or optimization, but a complete seal of the gap to Rarierraum against a mass transfer. By the latter measure for pressure equalization is thereby ensured that the with its elastic end on
- Impeller along sliding sealing element keeps the gap permanently closed during operation of the pump and is not affected or even damaged by occurring pressure differences due to forming air or gas bubbles in its sealing effect.
- Essential elements of the accordingly formed arrangement are accordingly an at least partially elastic sealing element and a sliding surface formed on the impeller of the centrifugal pump to be equipped with the arrangement.
- an elastic end of the sealing element slides along the sliding surface formed on the running wheel. It lies here in a larger portion of its extension flat against the sliding surface.
- the sealing element is fixed to a pressure lid which closes the pump housing of the centrifugal pump on the side facing away from its suction region, wherein the sliding surface is arranged on the impeller in the region of the rear gap, that is, a gap which is formed in the region of the Rainerraums.
- the proposed solution to the problem arrangement according to the invention further comprises means for ventilation of this wheel back rough ms.
- the elastic end of the sealing element to the
- the sliding surface by appropriate post-processing of the impeller and the means for pressure equalization by a corresponding Forming the sealing element or a post-processing of the pressure cap relatively easy to implement.
- an essential element of the solution according to the invention is to be seen in that the sliding along the low-wear sliding surface of the impeller end of the sealing element is elastic.
- Corresponding elastic properties are in particular elastomeric materials, such as polyurethane.
- at least the aforementioned end of the sealing element made of an elastomer, such as polyurethane. It is also conceivable, however, to form the sealing element largely or even completely of an elastomer.
- An advantageous embodiment is given in this context by the fact that the elastomeric regions of the sealing element are at least partially penetrated by a tissue. As a result, the sealing element is mechanically stabilized and increases its service life or lifetime.
- the sealing element on the pressure cover material fit, for example by gluing or vulcanization, be attached.
- the sealing element is fixed in force or force and form-fitting manner to the pressure lid.
- the sealing element can also be designed differently with respect to its shape.
- the sealing element is formed as an elastomeric sealing ring which slides with a first axial portion on the sliding surface of the impeller and with a second, according to an advantageous development of this embodiment with respect to the diameter conically tapered axial portion of a in the Rabineraum protruding portion or paragraph of the pressure cover is raised.
- the elastic, on the sliding surface of the impeller sliding along the end of the sealing element is formed by the aforementioned first axial portion.
- Such an embodiment is particularly suitable when the impeller on the one hand and the paragraph of the pressure cover on which the extent preferably made of an elastomer sealing element is trained to form a frictional connection or a positive and positive fit, on the other hand have a nearly the same diameter.
- the ventilation of the Ra07raums is given in the last described embodiment according to a first possibility in that in the pressure cover with respect to its circumference at least two positions depending behind a mounted on the pressure cover portion of the sealing element in the radial direction in the material of Pressure cover extending first bore and extending from the Ra07raum in the axial direction to the first bore second bore are formed.
- a channel is formed by the two converged bores, via which the pressure equalization can take place, for example, during the initial filling of the centrifugal pump with liquid.
- Another way to ventilate the Ra07raums in the equipped with an elastomeric sealing ring as a sealing element embodiment is that in the
- Sealing ring is formed with respect to its circumference at least two positions depending on a radially extending opening to Raderaum.
- the respective at least two apertures are accordingly formed in the transition region between the first axial section forming the elastic end and the second axial section of the sealing element mounted on the pressure cover.
- the sealing element is designed as a paragraph of the pressure cover engaging behind sealing sleeve.
- the different diameters of pressure cover and impeller are compensated by a section of the sealing collar extending in the radial direction.
- the ventilation of the Ra07raums is accomplished by a special design of the aforementioned sealing sleeve.
- the sealing sleeve in the radially extending portion of the sealing sleeve, based on its circumference, at least two positions in each case a respective radial portion in the axial direction through breakthrough formed.
- At least one support projecting in the axial direction and consisting of the material of the sealing collar or a support point is formed.
- at least four such Abstützept are provided based on the circumference of the sealing sleeve evenly spaced.
- Abstützept or support points is formed on the Ramonyseite between the pressure lid facing surface of the radial portion of the sealing sleeve and the pressure cover to a certain extent a planar cavity.
- Sealing element is adhesively bonded to the pressure lid by vulcanization.
- the pressure lid has a larger diameter relative to the impeller, it is also possible to press a bushing on the rear side of the impeller from which a bushing connected to the bush radially projects, which consists of a corresponding low-wear material.
- a bushing on the rear side of the impeller from which a bushing connected to the bush radially projects, which consists of a corresponding low-wear material.
- FIG. 2a shows another possible embodiment of the invention with gap sealing a centrifugal pump in the wheel back spatial
- FIG. 3a in the embodiment of FIG. 2a or 2b
- Fig. 3b the detail Z of Fig. 3a. 1 a shows a first possible embodiment of the invention with the seal formed according to the proposed solution in the gap region of the Rannenraums 6 a centrifugal pump for conveying solids containing liquids, through which the respective gap 3 is completely sealed against mass transfer.
- the centrifugal pump consists essentially of a pump housing 1, a recorded by the pump housing 1, rotatably driven by a shaft not shown, one-sided bearing impeller 2 and the pump housing 1 on the back occluding pressure cover 12.
- the pump housing 1 encloses a flow space through which The liquid containing solids to be conveyed flows during operation of the pump or is moved through by the rotating impeller 2.
- a suction 4 of this flow space opens a media inlet opening 7 for the liquid to be conveyed, which is discharged via a media outlet opening 8 in which the impeller radially surrounding pressure region 5 of the flow space.
- the sealing element 9 is made of an elastomer, preferably polyurethane or rubber, which may be interspersed with a tissue for stabilization.
- Fig. 1 b which shows the detail Z of the embodiment shown in FIG. 1 a, it can be seen that the sealing element 9 is designed here as an elastomeric sealing ring.
- This sealing ring tapers conically in an axial section 14. With the conically tapered portion 14 of the extent completely elastic sealing ring is mounted on a projecting into the Raußraum 6 section or paragraph of the pressure cover 12.
- the sealing element 9 forming the sealing ring contracts in its mounted on the pressure cover 12 section 14 due to its elastic nature, the sealing element 9 is non-positively fixed to the pressure cover 12 and thus possibly already reliable. Due to the fact that the axial section 14 of the sealing element 9, which is drawn onto the pressure cover 12, also conically tapers in the exemplary embodiment shown, this frictional connection is additionally supported by a positive connection.
- pressure equalization between the wheel back space 6 and the pressure region 5 of the flow space or a ventilation of the wheel back space 6 is provided via these channels.
- the wear-resistant sliding surface 10 is formed in the embodiment shown, as can be seen both from FIG. 1 a and from FIG. 1 b, in that a bush 19 is pressed onto the impeller 2 in the region of the wheel back side, which is pressed is connected to a rautden in the radial direction race 20.
- the sealing element 9 is here as a, a shoulder of the pressure cover 12 engages behind the elastomeric sleeve formed.
- the diameter of the protruding into the Ra speciallyraum 6 end of the pressure cover 12 is greater than that of the impeller 2.
- the diameter difference is not given in this embodiment by an appropriate design of serving to form the sliding surface 10 elements, but by a corresponding shape of the sealing element 9, balanced in the form of an elastomeric sealing sleeve.
- the sealing collar has a section 21 extending in the radial direction r. This section 21 is followed by the elastic end 1 1 of the sealing element 9 which is angled towards it and which slides along the wear-resistant sliding surface 10.
- Ramonyraums 6 is given here by the fact that in the sealing sleeve with respect to its circumference at least two positions each one the radial portion 21 of the sealing collar in the axial direction a through breakthrough 17, 17 'is provided.
- the radially extending section 21 of the sealing collar is formed of at least two, preferably four supports 18, 18 'which are formed distributed on the circumference of this section 21 and project in the axial direction a towards the pressure cover 12. cuff slightly spaced from the Druckdeckel12.
- the sliding surface is embodied in a circumferential groove of shallow depth incorporated on the wheel back in the impeller 2.
- the impeller 2 is coated either by a wear-resistant material or the sliding surface 10 is formed by pressing a wear-resistant ring into the groove.
- FIGS. 3a and 3b the elastomeric sealing collar used in the embodiment according to FIGS. 2a and 2b is again shown individually, wherein FIG. 3b relates to the detail Z of FIG. 3a.
- the two opposite circumferential positions in the sealing element 9 or in the sealing collar provided openings 17, 17 'and in their region in each case formed, towering in the axial direction Abstützept 18, 18' are particularly well visible in Fig. 3a.
- the corresponding training is again illustrated by the given in Fig. 3b magnification.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12788429.4A EP2766608B1 (de) | 2011-10-07 | 2012-10-04 | Kreiselpumpe für feststoffe enthaltende flüssigkeiten mit spaltabdichtung |
RU2014117306/06A RU2583482C2 (ru) | 2011-10-07 | 2012-10-04 | Центробежный насос для жидкостей, содержащих твердые вещества, и устройство для уплотнения зазора |
DE112012004156.9T DE112012004156A5 (de) | 2011-10-07 | 2012-10-04 | Kreiselpumpe für Feststoffe enthaltende Flüssigkeiten und Spaltabdichtung |
US14/350,316 US20140255165A1 (en) | 2011-10-07 | 2012-10-04 | Centrifugal pump for fluids containing solid materials, and gap seal |
CN201280048966.1A CN103857917A (zh) | 2011-10-07 | 2012-10-04 | 用于包含固体物质的液体的离心泵和缝隙密封装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011054320.1 | 2011-10-07 | ||
DE102011054320A DE102011054320A1 (de) | 2011-10-07 | 2011-10-07 | Kreiselpumpe und Anordnung zur Spaltabdichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013050031A1 true WO2013050031A1 (de) | 2013-04-11 |
Family
ID=47216000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2012/100314 WO2013050031A1 (de) | 2011-10-07 | 2012-10-04 | Kreiselpumpe für feststoffe enthaltende flüssigkeiten und spaltabdichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140255165A1 (de) |
EP (1) | EP2766608B1 (de) |
CN (1) | CN103857917A (de) |
DE (2) | DE102011054320A1 (de) |
RU (1) | RU2583482C2 (de) |
WO (1) | WO2013050031A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104265678B (zh) * | 2014-09-26 | 2017-02-15 | 浙江理工大学 | 用于叶轮和蜗壳间隙的密封机构 |
DE102016201969A1 (de) * | 2016-02-10 | 2017-08-10 | BSH Hausgeräte GmbH | Wäschepflegegerät mit einem Dichtelement |
RU169331U1 (ru) * | 2016-07-19 | 2017-03-15 | Общество с ограниченной ответственностью "ИнжиТех" | Бронедиск шламового насоса с уплотнением |
CN117067380B (zh) * | 2023-10-11 | 2024-01-26 | 成都永益泵业股份有限公司 | 一种氧化铝泵过流部件及其制作方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2270054A (en) * | 1939-10-13 | 1942-01-13 | Georgia Iron Works | Water seal for pumps |
DE2051011A1 (de) | 1970-10-17 | 1972-04-20 | Loewe Pumpenfabrik Gmbh | Spaltabdichtung für Kreiselpumpen und dergl |
DE2900434A1 (de) | 1978-01-10 | 1979-07-12 | Jan Cornelis Zwets | Abwasserpumpe |
JPS5724491A (en) | 1980-07-21 | 1982-02-09 | Hitachi Ltd | Sewage pump |
EP0395236A1 (de) * | 1989-04-27 | 1990-10-31 | A. Ahlstrom Corporation | Pumpe um Gas von einer zu pumpenden Flüssigkeit abzutrennen |
DE29619742U1 (de) | 1996-11-13 | 1997-01-09 | Grundfos As | Kreiselpumpe mit mindestens einem einflutigen Laufrad |
EP2348220A1 (de) * | 2009-12-30 | 2011-07-27 | Grundfos Management A/S | Tauchpumpe |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2475316A (en) * | 1946-12-27 | 1949-07-05 | Curtiss Wright Corp | Fluid pumping system |
NL157081B (nl) * | 1970-08-04 | 1978-06-15 | Ballast Nedam Groep Nv | Afdichting voor het afdichten van een spleet tussen een stationair en een roteerbaar onderdeel. |
US4227573A (en) * | 1978-11-16 | 1980-10-14 | Otis Engineering Corporation | Reinforced seal unit for pumpdown pistons or well swabs |
SU1096403A1 (ru) * | 1983-02-21 | 1984-06-07 | Ярославский политехнический институт | Центробежный насос |
NL8402886A (nl) * | 1984-09-20 | 1986-04-16 | Ihc Holland Nv | Centrifugaalpomp. |
US4867633A (en) * | 1988-02-18 | 1989-09-19 | Sundstrand Corporation | Centrifugal pump with hydraulic thrust balance and tandem axial seals |
US5971704A (en) * | 1997-04-23 | 1999-10-26 | Toyo Pumps North America Corporation | Device for adjusting the running clearance of an impeller |
JP2003074491A (ja) * | 2001-09-04 | 2003-03-12 | Nsk Ltd | ウォータポンプ用シール装置とウォータポンプ用回転支持装置とウォータポンプ |
DE102008001814A1 (de) * | 2008-05-15 | 2009-11-19 | Würdig, Uwe | Vorrichtung zur Laufradabdichtung bei Kreiselpumpen |
US8858157B2 (en) * | 2009-01-09 | 2014-10-14 | Sulzer Pumpen Ag | Centrifugal pump having an apparatus for the removal of particles |
-
2011
- 2011-10-07 DE DE102011054320A patent/DE102011054320A1/de not_active Withdrawn
-
2012
- 2012-10-04 US US14/350,316 patent/US20140255165A1/en not_active Abandoned
- 2012-10-04 CN CN201280048966.1A patent/CN103857917A/zh active Pending
- 2012-10-04 RU RU2014117306/06A patent/RU2583482C2/ru not_active IP Right Cessation
- 2012-10-04 EP EP12788429.4A patent/EP2766608B1/de active Active
- 2012-10-04 WO PCT/DE2012/100314 patent/WO2013050031A1/de active Application Filing
- 2012-10-04 DE DE112012004156.9T patent/DE112012004156A5/de not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2270054A (en) * | 1939-10-13 | 1942-01-13 | Georgia Iron Works | Water seal for pumps |
DE2051011A1 (de) | 1970-10-17 | 1972-04-20 | Loewe Pumpenfabrik Gmbh | Spaltabdichtung für Kreiselpumpen und dergl |
DE2900434A1 (de) | 1978-01-10 | 1979-07-12 | Jan Cornelis Zwets | Abwasserpumpe |
JPS5724491A (en) | 1980-07-21 | 1982-02-09 | Hitachi Ltd | Sewage pump |
EP0395236A1 (de) * | 1989-04-27 | 1990-10-31 | A. Ahlstrom Corporation | Pumpe um Gas von einer zu pumpenden Flüssigkeit abzutrennen |
DE29619742U1 (de) | 1996-11-13 | 1997-01-09 | Grundfos As | Kreiselpumpe mit mindestens einem einflutigen Laufrad |
EP2348220A1 (de) * | 2009-12-30 | 2011-07-27 | Grundfos Management A/S | Tauchpumpe |
Also Published As
Publication number | Publication date |
---|---|
DE102011054320A1 (de) | 2013-04-11 |
US20140255165A1 (en) | 2014-09-11 |
EP2766608A1 (de) | 2014-08-20 |
RU2014117306A (ru) | 2015-11-20 |
EP2766608B1 (de) | 2019-04-17 |
DE112012004156A5 (de) | 2014-06-18 |
CN103857917A (zh) | 2014-06-11 |
RU2583482C2 (ru) | 2016-05-10 |
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