EP1873399B1 - Kreiselpumpenaggregat - Google Patents

Kreiselpumpenaggregat Download PDF

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Publication number
EP1873399B1
EP1873399B1 EP06013504A EP06013504A EP1873399B1 EP 1873399 B1 EP1873399 B1 EP 1873399B1 EP 06013504 A EP06013504 A EP 06013504A EP 06013504 A EP06013504 A EP 06013504A EP 1873399 B1 EP1873399 B1 EP 1873399B1
Authority
EP
European Patent Office
Prior art keywords
housing
gas separation
centrifugal pump
assembly according
pump assembly
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.)
Active
Application number
EP06013504A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1873399A1 (de
Inventor
Bent Døssing
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.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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 Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP06013504A priority Critical patent/EP1873399B1/de
Priority to PL06013504T priority patent/PL1873399T3/pl
Priority to CN2007101262961A priority patent/CN101096954B/zh
Priority to US11/770,763 priority patent/US9028204B2/en
Publication of EP1873399A1 publication Critical patent/EP1873399A1/de
Application granted granted Critical
Publication of EP1873399B1 publication Critical patent/EP1873399B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour

Definitions

  • the invention relates to a centrifugal pump unit according to the features listed in the preamble of claim 1.
  • Centrifugal pump units of the aforementioned type are typically used in heating systems as circulating pumps, but also in other areas. Even if such systems are typically pressure-tight, it can often not be prevented that the circulated liquid entrains gas, in particular air, which is to be eliminated from the system, more expediently before passing through the centrifugal pump. It is therefore state of the art to provide gas separation devices in such systems.
  • a guide device is typically provided on the deflector plate, which shields this region of the settling chamber from the rest of the flow ,
  • a disadvantage of this known embodiment is that on the one hand the gas separation is often insufficient and on the other hand due to the deflector plate attached to the guide this is to align exactly during assembly, so that the guide is located at the intended location within the housing.
  • the invention has the object, a centrifugal pump assembly of the type mentioned in such a way that on the one hand improves the gas separation, on the other hand, the production, in particular assembly of the unit is simplified.
  • the centrifugal pump unit according to the invention has a device arranged on the suction side for separating off gas from the liquid to be conveyed.
  • This gas separation device has a baffle body, which is arranged at least partially in the suction-side flow path of the liquid to be delivered and on the housing side at a distance from the suction mouth of the pump.
  • the basic idea of the solution according to the invention is on the one hand, in the suction-side flow path of the liquid to be conveyed, ie in the Area in which the liquid coming from the suction nozzle flows into the unit housing, to provide a baffle body, which is arranged so that it is wholly or partially flowed by the inflowing liquid, in such a way that the liquid jet formed within the housing partially on the baffle of the impact body and preferably substantially perpendicular thereto impinges. It has surprisingly been found that a particularly effective and good gas separation is achieved in that a part of the housing-internal liquid flow impinges on the impact body.
  • the impact body can be acted upon by a part of the liquid flowing into the housing or, if the impact body is sufficiently small, it can be completely flown by a part of the flow.
  • the arrangement is such that not the entire flow impinges on the impact body.
  • the region of the edge of the impact body is particularly effective for the deposition process, in which the pressure conditions in the edge region cause the deposition process.
  • the baffle body according to the invention is arranged on the housing side and at a distance from the suction mouth of the pump. This achieves, on the one hand, that the inflow region of the pump, that is, the suction port is not influenced by the impact body in terms of flow, on the other hand, that the separated gas behind the impact body in the calmed area can rise largely trouble-free above arranged float housing and that the impact body Can be mounted on the housing side, typically in one piece with the corresponding housing part, if this is formed, for example, as a plastic injection molded part.
  • deflector plate which separates the pump housing from the gas separation device and thus from the gas separation housing
  • the deflector plate can be rotationally symmetrical and plate-shaped, which is not only the production, but in particular the Assembly simplified because an alignment of the plate in the circumferential direction as in the prior art is not required.
  • the baffle body according to the invention is arranged inside the gas separation housing and has a baffle surface, which is directed substantially radially or parallel to a radial and preferably also parallel to the impeller axis. Such an orientation of the baffle has proven to be particularly effective and allows effective gas separation at relatively small housing dimensions.
  • the baffle body is designed as a rib which is connected to the gas separation housing at least at one, but preferably at two or three sides.
  • the attachment typically takes place at the end wall opposite the intermediate wall (deflector plate), with which the rib can advantageously be formed in one piece. Depending on the extent of the rib, this may extend from one to the other peripheral wall.
  • the rib extends from peripheral wall to peripheral wall at a distance beyond the suction mouth of the pump.
  • the impact body forms part of the GasabscheidegePFuses.
  • the GasabscheidegePFuse can be formed without undercuts or at least be designed so that the use of lost cores when Injection molding is dispensable. This can be achieved in a simple form in that the impact body, in particular in the form of the rib in the drawing direction of the tool is formed without undercuts.
  • the gas separation housing and the pump housing are separated by an intermediate wall, then it is expedient to arrange the impact body at a distance from the intermediate wall so as to cause the turbulence in the region of the impact body with sufficient distance from the suction port of the pump.
  • the baffle body may be angled, such that baffle parts which are at an angle to each other form.
  • the angle span these baffles is between 90 ° and 270 °, particularly advantageous he is selected between 135 ° and 225 °.
  • the one or multiply angled design of the rib can then be advantageous if the guttering of the gas separation housing consists of both lost and drawn cores.
  • the size of the calming space above the rib can be influenced.
  • the baffle body does not end parallel to the intermediate wall at a distance, but the distance between the impact body and intermediate wall with increasing radial distance of the impeller axis is smaller, d. H. the impact body with increasing radial distance in its extension in the direction of the impeller axis or parallel to it becomes larger.
  • the pump housing and the gas separation housing are expediently designed and arranged in such a way that they are aligned with one another with their essentially circular inner contour, the gas separation housing having a peripheral adjoining inlet for having the delivery liquid.
  • a functional separation can then take place between the pump housing and the gas separator housing by inserting a deflector plate, wherein the deflector plate can be designed as a rotationally symmetrical plate which does not need to be aligned in the circumferential direction during assembly.
  • a substantially cylindrical float housing is provided, which is arranged and designed for the integration of a degassing valve.
  • This float housing passes through the wall of the gas separation housing circumferentially, wherein the housing part of the float housing located within the gas separation housing is provided with openings and the housing part located outside the gas separation housing is formed closed.
  • the cylindrical float housing is thus integrated into the unit housing, wherein the openings are arranged so that the separated gas, which naturally rises in the gas separation housing upwards, enters the region of the openings and thus into the float housing.
  • a float-controlled degassing valve is arranged in a conventional manner.
  • Such a component which is also referred to as a quick-ventilator, belongs to the state of the art and will therefore not be described in detail here.
  • the rib forming the baffle body can advantageously also be arranged at a distance below the central longitudinal axis of the gas separation housing or the axis of rotation of the pump impeller, such an arrangement is particularly advantageous if the flow enters the gas separation housing from the bottom vertically or laterally tangentially.
  • the suction-side connection of the pump unit is arranged on the gas separation housing, in such a way that it opens below the impact body.
  • the installation position of the pump unit is always defined by the Lucasabscheidegeophuse, which must connect in the upper part of the Gasabscheidegeophuses and whose cylindrical housing must be arranged with a substantially vertical axis.
  • the impact body according to the present invention typically has at least one inflow-directed impact surface. However, this does not necessarily have to be closed, so it is also conceivable to form the impact body like a comb, ie to provide a comb-like rib, so that the length of the edge, which produces a particularly high degassing effect on impact of the flow, is increased many times over.
  • the inflow side of the impact body ie the actual impact surface
  • has an angle ⁇ to the flow direction of the liquid flowing into the gas separation housing which is approximately between 45 ° and 90 °, for example between 20 ° and 90 °.
  • the flow direction does not necessarily have to be that with which the liquid flows from the suction-side connection into the gas separation housing
  • the impact body is expediently arranged so that it at least partially shields the openings to the float housing with respect to the flow and thus ensures in this area for a calming of the liquid and thus a good degassing.
  • the baffle body is wholly or partially in flow alignment with the suction-side connection of the housing. Escape to the suction-side connection of the housing in the sense of the present invention is understood to mean that the impact body lies in the flow direction of the liquid entering through the suction nozzle into the housing. When the suction nozzle enters the housing in a straight line, then the baffle body is in the true sense of the word in flight. However, if, for example, the inflow into the gas separation housing takes place on the suction side by means of a curved connection stub, then the impact body lies in this direction, that is to say in the flow direction.
  • the arrangement or size of the baffle body within the Gasabscheidegephases is chosen so that between 30% and 70% of the inflowing through the suction port in the Gasabscheidegephase pumping liquid impinges on the baffle and the rest of the pumped liquid flows freely past the baffle body into the housing , if necessary impinges on a housing wall.
  • the degree of overlap between impinging flow and impact body can advantageously be greater the further the fin is spaced from the suction-side inlet. It has surprisingly been found that in this arrangement a particularly effective degassing of the liquid flowing into the unit housing takes place.
  • suction-side connection piece inclined towards the front wall of the gas separation housing such that the suction side entering conveying fluid flows against both the frontal wall and the baffle body.
  • both the suction side and the pressure-side connecting pieces can be formed inclined, even with Inlinebauart.
  • FIG. 1 to 21 Based on Fig. 1 to 21 are possible arrangements of suction-side terminal 1, baffle body in the form of a rib 2 and float housing 3 with respect to the Gasabscheidegepuruse 4 shown.
  • the arrangements shown are not exhaustive, but only by way of example.
  • the basic structure of the pump unit in question is given by a not shown in the drawings motor housing with an electric motor, a subsequent pump housing 5 and an adjoining Gasabscheidegephase 4.
  • the shaft of the electric motor drives in known manner a pump impeller 6 which is rotatably mounted within the pump housing 5.
  • a partition 7 On the suction side pump housing 5 and 4 Gasabscheidegephaseuse are separated by a partition 7, which is incorporated between the aforementioned housing parts and having a central opening 8, which forms the suction port of the pump.
  • the partition 7 is formed as a rotationally symmetrical annular disc.
  • the pressure-side connection 9 is provided on the pump housing 5, whereas the suction-side connection 1 adjoins the gas separation housing 4.
  • the terminals 1 and 9 are inline, as is common in heating circulation pumps. These Arrangement of the connections is only an example, variations of the arrangement of the suction-side terminal 1 are based on the Fig. 1 to 21 as well as 22 to 30 shown:
  • the suction-side connection 1 is arranged on the underside of the gas separation housing 4 and is designed such that the flow entering through it is directed radially.
  • the embodiments according to the Fig. 1 to 3 show ribs 2, which extend through the longitudinal axis 10 of the housing and are fixed on three sides, namely on the front side and the two peripheral sides of the Gasabscheidegephinuses 4.
  • rib solid line
  • Fig. 1 clarifies that at the given inflow from below the in Fig. 1 right of the longitudinal axis 10 located rib portion instead of the straight course can also extend up to 45 ° obliquely downward.
  • the dashed line in Fig. 1 clarifies that at the given inflow from below the in Fig. 1 right of the longitudinal axis 10 located rib portion instead of the straight course can also extend up to 45 ° obliquely downward.
  • both parts of the rib 2 can extend up to about 45 ° to the preferred rib arrangement (solid line) right and left of the longitudinal axis 10 obliquely upwards in order to achieve the advantageous gas separation effect yet.
  • the rib portion located on the left side of the longitudinal axis 10 can be arranged in the region between the horizontal and an imaginary line extending obliquely upward therefrom at approximately 45 °, whereas the rib portion arranged on the right of the longitudinal axis 10 extends both up to 45 ° upwards and up to 45 ° ° can be angled downwards when the flow enters the housing radially from below and the float housing 3 fires on top of the gas cutting housing 4 in the top left corner.
  • the suction-side terminals 1 are mounted obliquely from below in the figures left, so that a substantially radial, so directed to the longitudinal axis 10 flow into the housing.
  • the flow is also radially, however, from the left side approximately in a nine o'clock position.
  • the suction-side port 1 In the execution of the 10 to 12 is the suction-side port 1, although in the same place as in the 4 to 6 provided, but the orientation is vertical, so that the flow into the housing is not directed towards the longitudinal axis 10, but rather tangentially and upwardly.
  • the rib 2 does not necessarily pass through from one to the other peripheral side of the Gasabscheidegepuruses, it ends in Fig. 10 at the point where she has crossed the suction mouth of the pump. It can, however, like that Fig. 10 illustrated by the broken line, also go through to the other peripheral side.
  • FIGS. 22 to 30 illustrates, where there are always three variants of the float housing arrangement are shown, correspond to the three arrangements of 1 to 3, 4 to 6, 7 to 9 , etc.
  • the inflow direction 11 is shown, it corresponds to the FIGS. 22 to 24 the basis of the Fig. 7 to 9 shown inflow direction.
  • the suction-side terminal 1 is connected to the bottom of the gas separation according to the representations of Fig. 1 to 3 or 16 to 18.
  • the suction-side connection connects obliquely to the gas separation housing, as is typically the case with reference to FIGS 4 to 6 is shown.
  • the rib always covers only a portion of the inflowing through the suction port into the gas separation housing 4 flow, in terms of area about 30 to 50% of the incoming beam cross-section.
  • the rib extends at least into the alignment of the cylindrical breather housing or beyond and thus shields the vent of the breather housing from direct flow through the suction-side port.
  • FIGS. 31 to 33 is the basis of Fig. 1 and 25 shown schematically in detail. It is an inline housing, wherein the suction-side terminal 1 opens at the bottom of the gas separation housing 4, namely Fig. 33 shows, in such a way that a non-perpendicular to the longitudinal axis 10 but slightly obliquely directed towards the end face 13 of the gas separation housing 4 directed flow direction 11 results.
  • the Gasabscheidegecher 4 has a substantially cylindrical inner contour and has, in addition to the end wall 13, which closes the unit housing towards the front, a peripheral wall 14 on which the end face of the pump housing 5 is aligned.
  • the partition wall 7 is incorporated in the form of a deflector, which functionally separates the two housing parts 4, 5 from each other.
  • the central opening 8 in the partition 7 forms the suction mouth of the pump.
  • the in Fig. 31 illustrated impeller 6, which is driven by the electric motor, not shown, on the other side of the pump housing 5 (in Fig. 33 right side) is connected.
  • the pump housing has on its upper side the pressure-side connection 9, which lies inline to the suction-side connection 1, which opens into the gas separator housing 4.
  • the rib 2 is provided as a baffle for the entering into the housing 4 flow.
  • the rib 2 extends from the peripheral wall 15 to the longitudinal axis 10 of the housing and from there to the opposite circumferential wall 14. It is integrally formed with the gas separation housing 4 and closes, such as Fig. 33 illustrates, even at the end wall 13, but ends at a distance from the partition 7. As based on Fig. 33 can be seen, the rib 2 extends in the axial direction 10 and parallel to different degrees, as well as from Fig.
  • the gas separation housing 4 is penetrated by the float housing 3, which is likewise essentially cylindrical, but whose longitudinal axis runs parallel to a radial line intersecting the axis 10.
  • the float housing 3 includes a float-controlled degassing valve, which is not shown in detail here and operates so that when gas accumulates within the float housing, a float drops and thereby opens a valve located at the top, until the gas collected therein is discharged to the outside and through the liquid flowing out of the floats is raised and the valve is closed.
  • the float housing 3 has an opening 12 to the gas separation housing 4, which is formed by a plurality of openings which lie in the region in which the float housing 3 is located within the gas separation housing 4. How the particular Fig. 33 illustrates, the openings 12 are shielded in the flow direction 11 by the rib 2, so that the fluid flowing into the Gasabscheidegepuruse 4 can not get directly into the float housing 3.
  • float housing 3, 4 Gasabscheidegetude and pump housing 5 are integrally designed as an injection molded part, the partition 7 is inserted from the motor side of the pump housing in this, as shown by the exploded view Fig. 31 is recognizable. It can, however Also, the two housing parts formed separately and formed under inclusion of the partition wall 7.
  • the above-described centrifugal pump unit generates when driving the pump impeller 6, a differential pressure between the suction-side port 1 and the pressure-side port 9, whereby liquid in the flow direction 11 flows through the suction-side port 1 in the Gasabscheidegepuruse 4.
  • the inflow is such that about 40% of the inflowing fluid impinges on the baffle formed by the underside of the rib 2 and the remaining liquid flow past the rib 2.
  • the angle ⁇ between the flow direction 11 and the baffle is here 75 °.
  • the basis of the FIGS. 31 to 33 illustrated rib 2 is angled, namely about the axis 10 such that two baffle surface side are formed, which point to the suction-side port 1 and span an angle ⁇ , which is here 243 °.
  • the liquid that has flowed into the gas separation housing 4 passes through the central opening 8 in the dividing wall 7, which forms the suction mouth of the pump, into the pump housing 5 and there into the suction mouth of the impeller 6, which then directs the flow further via the pump housing 5 pressure side nozzle 9 promotes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP06013504A 2006-06-29 2006-06-29 Kreiselpumpenaggregat Active EP1873399B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06013504A EP1873399B1 (de) 2006-06-29 2006-06-29 Kreiselpumpenaggregat
PL06013504T PL1873399T3 (pl) 2006-06-29 2006-06-29 Agregat z pompą odśrodkową
CN2007101262961A CN101096954B (zh) 2006-06-29 2007-06-29 离心泵装置
US11/770,763 US9028204B2 (en) 2006-06-29 2007-06-29 Centrifugal pump assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06013504A EP1873399B1 (de) 2006-06-29 2006-06-29 Kreiselpumpenaggregat

Publications (2)

Publication Number Publication Date
EP1873399A1 EP1873399A1 (de) 2008-01-02
EP1873399B1 true EP1873399B1 (de) 2012-12-05

Family

ID=37420853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06013504A Active EP1873399B1 (de) 2006-06-29 2006-06-29 Kreiselpumpenaggregat

Country Status (4)

Country Link
US (1) US9028204B2 (pl)
EP (1) EP1873399B1 (pl)
CN (1) CN101096954B (pl)
PL (1) PL1873399T3 (pl)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008052884A1 (de) * 2008-10-23 2010-05-06 Wilo Se Pumpengehäuse
US9303647B2 (en) * 2011-08-15 2016-04-05 Dale A. Conway Centrifugal pump anti-air locking system
CN104235070A (zh) 2013-06-13 2014-12-24 德昌电机(深圳)有限公司 泵壳及具有该泵壳的泵
KR20210110060A (ko) 2020-02-28 2021-09-07 엘지전자 주식회사 펌프
KR20210109796A (ko) 2020-02-28 2021-09-07 엘지전자 주식회사 유체 순환 펌프용 가스 분리구
KR20220099758A (ko) 2021-01-07 2022-07-14 엘지전자 주식회사 펌프

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Also Published As

Publication number Publication date
CN101096954A (zh) 2008-01-02
EP1873399A1 (de) 2008-01-02
PL1873399T3 (pl) 2013-06-28
CN101096954B (zh) 2011-09-14
US9028204B2 (en) 2015-05-12
US20080008578A1 (en) 2008-01-10

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