CN205243947U

CN205243947U - Pump housing

Info

Publication number: CN205243947U
Application number: CN201520646076.1U
Authority: CN
Inventors: 罗伯特.格列韦
Original assignee: Grundfos Holdings AS
Current assignee: Grundfos Holdings AS
Priority date: 2014-08-25
Filing date: 2015-08-25
Publication date: 2016-05-18
Anticipated expiration: 2025-08-25
Also published as: EP2990651A1; EP2990651B1; CN105387000B; CN105387000A

Abstract

The utility model relates to a pump housing (9) of centrifugal pump have first casing part (11), and this first casing part has at least one collecting part that inhales interface, pressure interface (42) and be used for gas separator to this first casing part is used for connecting electric driving motor (1) by the design, axle (4) supporting of driving motor can be in pump housing (9) pivoted impeller (6). Be equipped with second casing part (12), it can be cooperated ground to combine in first casing part (11) with the shape hermetcally to it is partly that second casing parts constitute the sunction inlet with the spiral casing that is used for impeller (6) of centrifugal pump (2).

Description

Pump case

Technical field

The utility model relates to a kind of pump case for centrifugal pump.

Background technology

The pump case of centrifugal pump has various embodiment. Particularly for circulating pump, for example small-powerOr the Heating Cyclic pump of mid power or undrinkable water circulating pump, hankering used as them to adding of room or houseLike that, be all regarded as centrifugal pump in prior art, its pump case is made up of synthetic material and conventionally makes with Shooting Technique. ThisPump case has at least one inhalation interface, pressure interface and the collecting part for gas separator, gas separatorBe arranged in the region between inhalation interface and suction inlet in the collecting part being integrated in accordingly in pump case. At this, pumpHousing is designed to connect the electric machine casing of electric drive motor, the rotating leaf in the axle supporting pump case of electric drive motorWheel. Conventionally be wet operation motor by design of electrical motor, that is, it comprises pipeline closed formula motor (Spaltrohrmotor), thereinThe rotor of motor is installed. Slit-tube (Spaltrohr) is connected on shaft bearing plate hermetically, and the bearing of shaft bearing plate storage motor shaft alsoBe arranged between motor and pump case. Shaft bearing plate forms a side of pump case simultaneously.

If pump case can be manufactured with synthetic material injection molding process at low cost, this is for particularly a large amount of and non-Normal large-scale production is favourable, now need to make great efforts to make housing to be formed by the least possible housing parts, and as far as possibleGround for not needing to lose core, loses member designs core and can make significantly injection mo(u)lding complicated and expensive especially.

Utility model content

Under this background, the purpose of this utility model is to design a kind of such pump case, makes on the one hand instituteThe housing parts needing is few as much as possible, can in the situation that not losing core as far as possible, manufacture on the other hand housing parts,And housing parts can also easily assemble.

Realize by a kind of pump case according to the purpose of this utility model, this pump case has the first housing parts, shouldThe first housing parts has at least one inhalation interface, pressure interface and the collecting part for gas separator, this first housingParts are designed to connect electric drive motor, and the axle of drive motors is supporting the impeller that can rotate in pump case, its featureBe to be provided with the second housing parts, this second housing parts can by hermetically with form fit be combined in the first housing partsIn, and form suction inlet and the part for the shaped spiral housing of the impeller of centrifugal pump. In description and accompanying drawing, provide rootAccording to preferred embodiment of the present utility model. At this, the feature providing in description and accompanying drawing also can be respectively with suitableCombination construct further according to technique scheme of the present utility model.

Preferably, it is articles injection-moulded that the first housing parts and the second housing parts are designed to synthetic material, and do not losingManufactured in the situation of core.

Preferably, between the first housing parts and the second housing parts, form and be positioned at suction inlet intake chamber before, logicalPipeline to inhalation interface passes in intake chamber, and intake chamber have for the collecting part of gas separator or with these receiptsThe part pipeline of receiving connects.

Preferably, the second housing parts have around axial edge, it is circle that this axial edge is constructed at least localTaper, and be bonded on hermetically in the corresponding collecting part in the first housing parts.

Preferably, the axial edge of the second housing parts enters at it restriction that is subject to radial wall on end, this radial wallBe set to, abut in the sedimentation part of the collecting part in the first housing parts.

Preferably, shaped spiral housing has the axial walls arranging around the central longitudinal axis spirality of pump case, and this is axialWall is made up of the second housing parts.

Preferably, shaped spiral housing has radial wall, and this radial wall is a part for the second housing parts, and makes shaped spiral housingSeparate with the intake chamber of surrounding suction inlet.

Preferably, shaped spiral housing has at least one radial wall, and this at least one radial wall is about central longitudinal axis spiral shellSpin line shape ground arranges.

Preferably, the second housing parts has the guiding piece that is arranged essentially parallel to axle orientation, and this guiding piece is contained in placeIn corresponding guiding piece collecting part on the first housing parts inner side.

Preferably, the second housing parts has recess in axial walls, in the axial walls of recess and the first housing partsRecesses align, and formation is led to a part for the pressure channel of pressure interface.

Preferably, axial edge is interrupted in the region of axially aligning with respect to recess, and utilizes for this edgeRespective bump portion in collecting part replaces.

Preferably, the axial walls of shaped spiral housing radially starts on indentation ground in a side of recess (39), and at radial opening(39) opposite side expansion ground finishes.

Preferably, the first housing parts has the axial walls of local envelopment suction inlet, and the second housing parts is bearing in this axleOn the free end face of wall.

Preferably, the axial walls of the first housing parts separates intake chamber with degassed chamber, degassed chamber side thereonBe connected with the collecting part pipeline for gas separator.

Preferably, the second housing parts is connected with the first selected housing parts alternatively, the first housing parts spyNot about the setting of interface and different.

The utility model also proposes a kind of centrifugal pump group, and it comprises pipeline closed formula motor and foregoing pump caseBody.

According in centrifugal pump group of the present utility model, preferably, the axial walls of shaped spiral housing by the flange of slit-tube orShaft bearing plate forms, and shaft bearing plate is for receiving the bearing of the axle that carries impeller.

There is the first housing parts according to centrifugal pump casing body of the present utility model, it comprise at least one inhalation interface,Pressure interface and for the collecting part of gas separator, and be designed to connect electric drive motor, the axle of electric drive motor props upHold the rotating impeller in pump case. Be provided with the second housing parts according to the utility model, it can be joined with shape hermeticallyClose and be combined in the first housing parts, and form suction inlet and the part for the shaped spiral housing of centrifugal pump impeller.

Be according to the basic thought of pump case of the present utility model, the housing member of making by synthetic material injection moulding is wholeOn body, be divided into two parts: the first housing parts comprises inhalation interface, pressure interface and the collecting part for gas separator, and quiltBe designed to connect electric drive motor; The second housing parts is designed to, and can seal, be combined in to form fit the first housing sectionIn part, and form suction inlet and the part for the shaped spiral housing of centrifugal pump impeller. In the utility model, " sealing " is notRefer to must 100% ground sealing, but should be understood to, this sealing can farthest be avoided by the second housing partsSuction side separately and on the pressure side between occur overcurrent (Overflow). But it is pointed out that in the modern timesIn the pump of efficiency optimization, be thisly sealed in this not generation efficiency loss. The shape of the second housing parts in the first housing partsThe combination coordinating realizes like this: the second housing parts is in all directions except the opposite direction with respect to direction of insertionAll by the first housing parts by form fit keep. Along passing through with respect to the form fit in the opposite direction of direction of insertionDriver element is realized, and realizes typically by the shaft bearing plate of canned pump housing.

Therefore, provide a kind of pump case of complicated moulding according to the technical solution of the utility model, this pump case canSubstantially form by two synthetic materials are articles injection-moulded, this synthetic material is articles injection-moulded can, not losing core, only be madeIn situation with recyclable core or other reusable cores, make. At this, by favourable separation, can be by suctionMouthful and be all arranged on the second housing parts for a part for the shaped spiral housing of centrifugal pump impeller, this is favourable for hydraulic pressure. In addition, extremely stable according to shell structure of the present utility model, because all bearing interfaces, inhalation interface, pressure connectMouthful and be all combined as a whole with the first housing parts for the collecting part of gas separator, and layout based on them and additionallyMake the first housing parts stable. At this, the wall that this first housing parts is configured to degasser pump case parts can be advantageouslyMake housing additionally stable, second housing parts almost only with hydraulic function can be designed as relatively light andThin-walled.

In principle, also can other mode manufacture according to pump case of the present utility model. But particularly preferably by two shellsIt is articles injection-moulded that body component is designed to synthetic material, and can in the situation that not losing core, manufacture, because thus can be realNow produce cheaply in enormous quantities.

According to the preferred expansion scheme of one of the present utility model, between two housing parts form be positioned at suction inlet itFront intake chamber, the pipeline that is drawn towards inhalation interface passes in this intake chamber, and this intake chamber comprises for gasThe collecting part of separator or be connected with this collecting part pipeline. Liquid to be conveyed by suction inlet and arrive impeller essence doBefore region, can being provided with of intake chamber guide into inhalation interface pipeline and guide into the pipeline of gas separator or forIn the region of the collecting part of gas separator, realize and flowing stably and the separating of gas and liquid to be conveyed.

Can be bonded to each other and be integrated hermetically in order to ensure housing parts, particularly by the second housing parts hermeticallyBe combined in the first housing parts, preferably on the second housing parts arrange around axial edge, this edge at least part isConical, and be bonded on hermetically in the first housing parts in corresponding collecting part. Axial edge in the utility model isRefer to the edge that wall extends along the direction that is parallel to axle substantially. By the conicity at this edge, at least in exterior section, oneAspect makes to install and is more prone to, because the second housing parts can be inserting when the first housing parts by conicity by automaticallyGuide in the appointed position of the first housing parts inside, on the other hand can be the in the situation that of combination seal part not, only by knotStructure design is accommodated in the first housing parts this edge hermetically. At this, preferably should around axial edge in installation positionBe set up, in the time connecting drive motors, hidden by shaft bearing plate, and be arranged in thus the region that hydraulic pressure does not load.

At this, preferably should around axial edge on the second housing parts, enter end (zulaufenden near itEnde) be subject to the restriction of a wall radially, this radial wall abuts in the sedimentation part of the collecting part that is arranged in the first housing parts(Absatz) on. In this way, can independently form one with the conicity of collecting part and stop, it can ensure secondHousing parts is not too in depth pushed in the first housing parts. Divide and be connected with the subsidence part of the collecting part of the first housing partsThe radial wall connecing has formed the form fit part between housing parts, and the second housing parts is bearing in to the first housing reliablyIn parts, and not can along with second component enter the first housing parts the degree of depth increase and enter the region at edge at taper shapeMiddle generation is unallowed heavily stressed.

Preferably, the shaped spiral housing of the part of formation the second housing parts has the center longitudinal axis around pump caseThe axial walls that line spirality arranges. It is particularly advantageous forming shaped spiral housing by this axial walls on hydraulic pressure, and can beThe second housing parts inside without undercutting (hinterschneidungsfrei, without side lowland) realize, and therefore can be with simplyInstrument realize.

In addition, shaped spiral housing has at least one radial wall, and this radial wall is a part for the second housing parts equally, andShaped spiral housing is separated with the intake chamber of surrounding suction inlet.

In the utility model, axial walls refers to that in axial direction to extend, be arranged essentially parallel to the center of pump case verticalThe wall arranging to axis, central longitudinal axis forms the pivot center of impeller simultaneously. Radial wall under the utility model meaning isRefer to transverse, the wall substantially radially extending about the central longitudinal axis of pump case. The axial walls of spirality setting isBe parallel to the wall that the central longitudinal axis of pump case arranges, but the interval between them is according to respect to central longitudinal axisAngle and change, observe and formed spiral extension along the direction of central longitudinal axis thus.

On hydraulic pressure particularly advantageously: shaped spiral housing not only spirally forms about axial walls, and has also extremelyA few radial wall, this radial wall about central longitudinal axis spiral yarn shaped arrange, tilt to extend ground and arrange, namelySay, this radial wall about sagittal plane and Angular correlation rise, radial wall becomes with respect to the interval of this sagittal planeChange. Within preferably the radial wall of this spiral yarn shaped setting is formed in the second housing parts.

At this, preferably the second housing parts has vertically the guiding piece that is orientated, is parallel to axle orientation, this guiding piece quiltBe accommodated in the corresponding guiding piece collecting part being arranged on the first housing parts inner side. This guiding piece has formed on the one hand for baseIn basis, be the torsion protection of the second housing parts of circle, make in addition the dress in the appointed position in the first housing partsJoin and be more prone to, and ensure to be only arranged in appointed position.

According to the preferred expansion scheme of one of the present utility model, the second housing parts has recess in an axial walls,This recess be arranged in the recesses align of the first housing parts axial walls, and form of pressure channel of leading to pressure interfacePoint. Shaped spiral housing in the second housing parts is connected with the passage that leads to pressure sleeve in the first housing parts by this recessConnect. Can realize thus the passage guiding without undercutting, this passage guiding can advantageously consist of tool technique.

In order not make the recess that is arranged in the second housing parts axial walls be closed, in all sides along circumferential all byWall surrounds, and this cost with regard to tool technique is very high, preferably recess can be designed to open in a side, extends toVertically around conical edge in, this favourable be not only this around edge, in edge with respect to this recess axleRegion to alignment is interrupted, and can utilize for the respective bump portion of the collecting part at this edge and replace. For limitRespective bump portion in the collecting part of edge has functionally sealed the recess of axial rings in edge, makes thus in this axial wallsThe recess border of leading to pressure interface on formed the recess of a sealing, although this recess is constructed in the second housing partsOne side is opened. Because this recess has formed the end of shaped spiral housing in function, therefore the axial walls of shaped spiral housing is designedFor, from a side indentation of this recess, and expansion ground ends at the opposite side of this radial indent. In this way, shouldAxial walls can be all that hydraulic pressure is effective about the almost whole periphery of housing as a part for shaped spiral housing.

Owing to being freely at the face of enclosure interior, therefore act on housing wall, suction side and on the pressure side betweenPressure can be relatively large. Thus, preferably the first housing parts has the axial walls of surrounding partly suction inlet, the second shellBody component is bearing on the free end face of this axial walls. This axial walls is advantageously divided intake chamber and degassed chamber in functionFrom, in addition for support the second housing parts at zone line, realize thus stable especially shell structure, and specialBe the wall of the second housing parts can be configured to relatively thin. The axial walls of this local envelopment suction inlet is preferably around suctionIn the scope that entrance is 180 ° to 270 °, extend, and on the opposite side on suction inlet opposite, formation is further separated by liquid stream thusDegassed chamber. This degassed chamber thereon side is connected with the collecting part pipeline for gas separator, or at least with lead to therePipeline be connected.

According to the preferred expansion scheme of one of the present utility model, the second housing parts can be optionally with selectedThe first housing parts is connected, and the first housing parts is about the setting of interface and different. In this way, can be forDifferent housings configures about the identical pump of driver, impeller and shaped spiral housing with installation object, and its hydraulic characteristic does not change.This may be significant especially in the time for example need to carrying out special mounting for heater, and its advantage is, can makeThe hydraulic pressure design of pump and driver remains unchanged, and only need to structurally adjust the housing parts of suction side, i.e. the first shellBody component. Can reduce thus the element diversity in the time manufacturing and store.

The second housing parts has advantageously formed axial walls and the radial wall of shaped spiral housing. At motor side sealing shaped spiral housingWall preferably formed by the flange of shaft bearing plate or slit-tube, at this, shaft bearing plate is for carrying the bearing of axle of impeller. By this sideFormula can make the wall of the motor side being conventionally made up of metallic plate extend in a plane, and the needed parts of shaped spiral housing mouldingBe made up of the second housing parts, this second housing parts has and is preferably that the radial wall of spiral yarn shaped setting and spirality arrangeAxial walls.

Brief description of the drawings

To be described further the utility model by means of embodiment illustrated in the accompanying drawings below. Wherein:

Fig. 1 shows centrifugal pump group with the perspective view of simplifying very much, this centrifugal pump group by with shown in exploded view fromHeart pump and drive motors composition,

Fig. 2 shows the longitdinal cross-section diagram of unit as shown in Figure 1,

Fig. 3 shows the perspective exploded view of two pump case parts,

Fig. 4 to be to show the first pump case parts in Fig. 3 according to the view mode of Fig. 3,

Fig. 5 to be to show the second housing parts in Fig. 3 according to the view mode of Fig. 3,

Fig. 6 shows the second housing parts of seeing from dorsal part with perspective view,

Fig. 7 has illustrated the longitudinal section of pump case with schematic diagram,

Fig. 8 shows the zoomed-in view of the details VIII in Fig. 7,

Fig. 9 shows the zoomed-in view of the details of the second housing parts in the notched region of pressure sleeve side,

Figure 10 shows the zoomed-in view of the details of the first housing parts in details area as shown in Figure 9.

Wherein, reference numerals list is as follows:

1 driver element

2 centrifugal pumps

3 rotors

4 axles

5 shaft bearing plates

6 impellers

7 electronics housing

8 electric machine casings

9 pump case

10 screws

11 first housing parts

12 second housing parts

13 adpting flanges

14 collecting parts

15 sedimentation parts

The cylindrical wall of 16 collecting parts 14

The sedimentation part of 17 collecting parts 14

18 suction passages

19 inhalation interfaces

20 collecting parts

21 breather valves

22 horizontal wall

23 longitudinal central axis lines

24 axial walls

25 suction inlets

26 intake chambers

27 steady and degassed chambers

The end face of 28 axial walls 24

29 axial edge

The conical section of 30 axial edge 29

The cylindrical segment of 31 axial edge 29

32 radial walls

33 axial walls

34 radial walls

35 cylindrical segments

36 bottoms

37 guiding pieces

38 collecting parts

Recess in 39 second housing parts 12

Recess in 40 first housing parts 11

41 passages

42 pressure interfaces

43 lug bosses

Detailed description of the invention

Comprise driver element 1 and centrifugal pump 2 at the centrifugal pump group shown in Fig. 1 and Fig. 2. Driver element 1 is with knownMode has motor, and this motor is designed to wet operation motor and has slit-tube or slit-tube tank, and rotor 3 moves in slit-tubeAnd thering is axle 4, this axle is bearing in the bottom of slit-tube tank on the one hand, is bearing on the other hand in shaft bearing plate 5 in corresponding bearing, shouldThe free end of axle is carrying impeller 6, and this impeller rotates in centrifugal pump 2. In addition, driver element 1 also has electronic device shellBody 7 is provided with frequency converter and other control and regulates electronic device, and being connected to power supply by it in this electronics housingLine. Actual electric machine casing 8 has flange, and this flange is connected on the abutted flange 13 of pump case 9 and by four screws 10Be connected with this abutted flange.

Pump case 9 is made up of two housing parts 11,12, and these housing parts can conduct in the situation that not losing coreArticles injection-moulded making, i.e. the first housing parts 11 and the second housing parts 12. The first housing parts 11 is essentially pot shape, itsHave the adpting flange 13 that points to electric machine casing 8, this adpting flange externally defines circular collecting part 14, and this collecting part is set upBe used for receiving the second housing parts 12, and be form fit receive the second housing parts. Adpting flange 13 is designed to phase(abgesetzt) that can sedimentation for collecting part 14, particularly as shown in Figure 8. The sedimentation part 15 of adpting flange inside forIn the time that being connected in pump case 9 with its electric machine casing 8 flanges, driver element 1 receives the shaft bearing plate 5 of driver element 1. Actual receiptsThe part 14 of receiving extends to the inside of the first housing parts 11 from sedimentation part 15. Collecting part be outwards subject to around, be essentially roundThe restriction of the wall 16 of cylindricality, is inwardly subject to the restriction of sedimentation part 17.

The pot shape internal chamber that is positioned at the first housing parts 1 inside is inwardly connected on collecting part 14, is drawn towards to suck to connectThe suction passage 18 of mouth 19 passes in this internal chamber in the region below. In the Background Region on top, be provided with and be essentiallyColumniform collecting part 20 is for breather valve 21, and this breather valve forms gas separator. Collecting part 20 comprises integrally combinationDetermine the installation site of unit in breather valve 21 wherein, and be therefore set to, made to be essentially columniform collecting part20 arrange vertically according to its longitudinal axis, thereby make breather valve 21 be arranged on upside. Collecting part 20 has recess in bottom,This recess generally passes in the region of suction passage 18 tops; Collecting part 20 also has recess, this recess in cylindrical wallPass into equally the inside of pump case 9, and be arranged on the top of horizontal wall 22, this horizontal wall is arranged essentially parallel to the longitudinal of pump caseAxis 23, this longitudinal central axis line is consistent with the turning cylinder of rotor 3. Horizontal wall 22 forms a part for axial walls 24, and this is axialApproximately 180 ° of ground of wall are around the pump intake 25 being made up of the central opening in the second housing parts 12, and with respect to steadily and de-Gas chamber 27 delimit the border by the intake chamber 26 forming before suction inlet 25. The end of the sensing driver element 1 of axial walls 24Face 28 supports the second housing parts 12 around suction inlet 25 on installation site.

The second housing parts 12 have local interruption around axial edge 29, this edge has the taper shape of being and enters into pumpThe section 30 of housing 9 inside and be connected to the cylindrical segment 31 on this edge. The cylindrical segment 31 of axial edge 29 is transitioned into radiallyWall 32, this radial wall laterally extends with respect to longitudinal central axis line 23, and abuts in the sedimentation part of collecting part 14 with its dorsal partIn 17. At this, axial walls 29 abuts in the cylindrical wall 16 of the first housing parts 11 hermetically, and at this, wall thickness is less than wall 29The conical section 30 of remainder flush ground sealing paste and lean against on wall 16. This transitional region is after this in the time connecting driver element 1To be hidden by shaft bearing plate 5, thereby can guarantee being tightly connected between two housing parts 11 and 12.

On radial wall 32 towards pump case 9 be internally connected with axial walls 33, longitudinally the direction of axis 23 is observed,This axial walls has and is roughly spiral extension (seeing Fig. 3), and forms the circumferential wall of the shaped spiral housing of centrifugal pump 2. Propeller capThis axial walls 33 of body is inwardly indentation first radially, and defines recess 39, and bending approximately 90 ° are transformed into real spirality subsequentlyExtend, this spiral extension is expanded and is stopped in the another side of radial indent. In axial walls 33, be also connected with in pumpThe radial wall 34 of portion, this radial wall forms the sidewall of shaped spiral housing, and can be designed as spiral yarn shaped ground, goes up obliquelyRise. Another sidewall of shaped spiral housing is made up of shaft bearing plate 5. On radial wall 34, be dual U-shaped towards being internally connected with cross sectionRing segment, the axial circular cylindricality section 35 of this ring segment forms pump intake 25, this ring segment radially bottom 36 installOn position, be subject to the supporting of the end face 28 of axial walls 24 or horizontal wall 22.

On the side of the sensing pump case inside of radial wall 32 and axial walls 33, be provided with about longitudinal central axis line 23 with greatlyThe angle intervals distribution ground guiding piece 37 of approximately 120 °, these guiding piece substantial axial are extended abreast and are rabbeted at the first housingIn corresponding collecting part 38 in parts 11. The guiding piece 37 being connected with collecting part 38 in the second housing parts 12 makes secondHousing parts 12 can easily be pushed in the collecting part 20 of the first housing parts 11, and ensures pushing away by its inclined planeEnter the automatic conventional location in process, protected in addition at first housing parts 11 inside the second housing parts in relative rotation12。

As shown in Fig. 3, Fig. 5 and Fig. 9, extend to two sides of recess 39 in the axial walls 33 of peripheral side restriction shaped spiral housingFace. Recess 39 in axial walls 33 is unilaterally, is towards axial edge 29 open, and continues therein to extend. ?In one housing parts 11, be provided with the recess 40 aliging with the recess 39 in axial walls 33, recess 40 passes in passage 41, logical at thisThe end in road is provided with the pressure interface 42 of pump case 9. Recess 40 in the region of cylindrical wall 16 by the lug boss 43 in this wallSurround, this lug boss is designed to, and makes the region of axial edge 29 at recess 39 on the installation site of the second housing parts 12In extend with flushing. In this way, can realize on the one hand the good hydraulic pressure of shaped spiral housing in pressure channel carriesAnd the favourable passage of realizing thus hydraulic technique carries, can also make on the other hand as the second articles injection-moulded housing parts12 manufacture is significantly simplified, because the recess 39 of the one-sided opening based in axial edge 29 and axial walls 33,In this region without tractive core (Ziehkerne).

Be in operation, if the second housing parts 12 is combined in the first housing parts 11 routinely, and drive singleUnit 1 is connected with pump case 9 by electric machine casing 8, and liquid to be conveyed arrives in suction passage 18 by inhalation interface 19, axleTo wall 24 near this suction passage. In this region, namely in the region of steady and degassed chamber 27, mobile easing up,Thereby gas can be separated from liquid and to rising to breather valve 21, and outdoor in this arrival. Liquid arrives suctionChamber 26, and enter actual delivery chamber from this by suction inlet 25, at this, by the impeller rotating in shaped spiral housing6 pairs of liquid loaded energy. Pressurized liquid arrives in passage 41 by recess 39 and 40, and goes to therefrom pressure interface42。

Being integrated the second housing parts 12 being combined in the first housing parts 11 can do into one aspect hydraulic pressureThe design of step ground, and without the high instrument of price. Shaped spiral housing can correspondingly be realized hydraulic pressure demand about sidewall and circumferential wall,And do not require other member, the first housing parts 11 and the driver element that sealed by shaft bearing plate 5 with respect to pump do anyThe adjustment of form.

For example, when being arranged on interface on the first housing parts 11 should be with other layout setting time, or this housingWhen parts for example must have other exterior contour due to special installation situation, also can following form be adjusted by pumpWhole: make the first housing parts 11 by differently moulding, but the machinery of pump and hydraulic unit can to remain unchanged, i.e. driver element 1Remain unchanged with shaft bearing plate 5 and impeller 6 and the second housing parts 12.

Claims

1. the pump case for centrifugal pump (2) (9), has the first housing parts (11), and described the first housing parts hasAt least one inhalation interface (19), pressure interface (42) and the collecting part (20) for gas separator (21), described the first shellBody component is designed to connect electric drive motor (1), and axle (4) supporting of described electric drive motor can be in described pump case (9)The impeller (6) of middle rotation, is characterized in that, is provided with the second housing parts (12), described the second housing parts can be by hermetically andBe combined in to form fit in described the first housing parts (11), and described the second housing parts forms suction inlet (25) and usesIn a part for the shaped spiral housing of the impeller (6) of described centrifugal pump (2).

2. pump case according to claim 1, is characterized in that, described the first housing parts (11) and described the second housingIt is articles injection-moulded that parts (12) are designed to synthetic material, and manufactured in the situation that not losing core.

3. pump case according to claim 1 and 2, is characterized in that, described the first housing parts (11) and describedBetween two housing parts (12), form and be positioned at described suction inlet (25) intake chamber (26) before, lead to described inhalation interface(19) pipeline (18) passes in described intake chamber, and described intake chamber has for described gas separator (21)Collecting part (20) or be connected with this collecting part pipeline.

4. pump case according to claim 1 and 2, is characterized in that, described the second housing parts (12) have aroundAxial edge (29), this axial edge is constructed at least local for conical, and is bonded on hermetically described the first housingIn corresponding collecting part (14) in parts (11).

5. pump case according to claim 4, is characterized in that, the axial edge (29) of described the second housing parts (12)Enter at it restriction that is subject to radial wall (32) on end, described radial wall is set to, and abuts in described the first housing parts(11) in the sedimentation part (17) of the collecting part (14) in.

6. pump case according to claim 1 and 2, is characterized in that, described shaped spiral housing has around described pump case(9) axial walls (33) that central longitudinal axis (23) spirality arranges, this axial walls is by described the second housing parts (12) structureBecome.

7. pump case according to claim 1 and 2, is characterized in that, described shaped spiral housing has radial wall (34), this footpathBe a part for described the second housing parts (12) to wall, and make described shaped spiral housing and the suction of surrounding described suction inlet (25)Chamber (26) separates.

8. pump case according to claim 6, is characterized in that, described shaped spiral housing has at least one radial wall(34), this at least one radial wall about described central longitudinal axis (23) spiral yarn shaped arrange.

9. pump case according to claim 1 and 2, is characterized in that, described the second housing parts (12) has substantiallyThe guiding piece (37) that is parallel to axle orientation, described guiding piece is incorporated in the phase being positioned on described the first housing parts (11) inner sideIn the guiding piece collecting part (38) of answering.

10. pump case according to claim 4, is characterized in that, described the second housing parts (12) is in axial walls (33)In there is recess (39), the recess (40) in the axial walls (16) of described recess and described the first housing parts (11) aligns, andForm a part for the pressure channel (41) that leads to described pressure interface (42).

11. pump case according to claim 10, is characterized in that, described axial edge (29) is with respect to described recess(39) in the region of axially aligning, be interrupted, and utilize the respective bump portion (43) for the described collecting part (14) at this edgeReplace.

12. pump case according to claim 10, is characterized in that, the axial walls (33) of described shaped spiral housing is described recessedOne side of mouth (39) radially starts on indentation ground, and expands ground end at the opposite side of radial opening (39).

13. pump case according to claim 3, is characterized in that, described the first housing parts (11) has local envelopmentThe axial walls (24) of described suction inlet (25), described the second housing parts (12) is bearing in the free end face (28) of this axial wallsOn.

14. pump case according to claim 13, is characterized in that, the axial walls (24) of described the first housing parts (11)Described intake chamber (26) is separated with degassed chamber (27), described degassed chamber thereon side with for described gas separator(21) collecting part (20) pipeline connects.

15. pump case according to claim 1 and 2, is characterized in that, described the second housing parts (12) can be optionallyBe connected with selected the first housing parts (11), described the first housing parts is not particularly about the setting of interface and to some extentWith.

16. 1 kinds of centrifugal pump groups, comprise pipeline closed formula motor and as pump case in any one of the preceding claims wherein(9)。

17. centrifugal pump groups according to claim 16, is characterized in that, the axial walls of described shaped spiral housing is by slit-tubeFlange or shaft bearing plate (5) form, and described shaft bearing plate is used for the bearing of the axle (4) that receives the described impeller of carrying (6).