CN106286382A - A kind of mixed-flow pump improving blade rim leakage stream - Google Patents

A kind of mixed-flow pump improving blade rim leakage stream Download PDF

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Publication number
CN106286382A
CN106286382A CN201610855766.7A CN201610855766A CN106286382A CN 106286382 A CN106286382 A CN 106286382A CN 201610855766 A CN201610855766 A CN 201610855766A CN 106286382 A CN106286382 A CN 106286382A
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CN
China
Prior art keywords
stator
dentation
blade
mixed
housing
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.)
Pending
Application number
CN201610855766.7A
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Chinese (zh)
Inventor
李伟
季磊磊
施卫东
张扬
赵晓凡
张文全
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.)
Jiangsu University
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Jiangsu University
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 Jiangsu University filed Critical Jiangsu University
Priority to CN201610855766.7A priority Critical patent/CN106286382A/en
Publication of CN106286382A publication Critical patent/CN106286382A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D11/00Other rotary non-positive-displacement pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/20Mounting rotors on shafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/406Casings; Connections of working fluid especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/605Mounting; Assembling; Disassembling specially adapted for liquid pumps

Abstract

The invention provides a kind of mixed-flow pump structures and methods improving blade rim leakage stream, blade is arranged on impeller hub, and stator is arranged on stator wheel hub;Stator wheel hub is arranged on pump shaft by bearing, and impeller hub is fixed on pump shaft by flat key;The wheel rim of stator and the inwall of stator room housing are in close contact;Described blade rim is machined with " dentation " square projection, described inner wall of runner chamber is machined with " dentation " square groove, described " dentation " square projection stretches in described " dentation " square groove, has gap between wheel rim and the inwall of runner envelope housing of described blade.Cooperated by " dentation " the square projection processed at blade rim and " dentation " square groove processed at inner wall of runner chamber, make fluid can have bigger resistance through mixed-flow pump blade tip clearance, add the kinetic energy rejection of rim area fluid, thus reduce the generation of wheel rim leakage stream, improve the hydraulic performance of mixed-flow pump.

Description

A kind of mixed-flow pump improving blade rim leakage stream
Technical field
The invention belongs to fluid machinery technical field, especially relate to a kind of mixed-flow pump improving blade rim leakage stream, Can be used for improving the stability of mixed-flow pump impeller internal flow.
Background technology
Mixed-flow pump is a kind of performance and structure hydraulic between centrifugal pump and axial-flow pump, has big flow, efficiently The advantages such as rate, simple in construction, easy to use and anti-cavitation performance are strong, agricultural drainage and irrigation, city water supply and sewage, large hydraulic engineering and The fields such as the circulation of nuclear power station play an important role.In order to ensure the safe operation of mixed-flow pump, at design mixed-flow pump During impeller, between blade rim and the inner wall of runner chamber face of mixed-flow pump impeller, the most inevitably there is certain gap.Although Between blade rim and runner envelope wall, to compare proportion with the height of whole blade the least for the height in gap, but holds at this Being easily generated wheel rim leakage stream, leakage stream forms wheel rim leakage vortex with suction surface main flow blending.Research finds, leakage drains off and disturbs main flow Motion, the region of nearly on runner 20% produces impact, causes the biggest energy loss, reduce raising of whole mixed-flow pump device Journey and efficiency.Therefore, reduce or prevent the wheel rim leakage stream of mixed-flow pump from can improve the flow field structure in impeller, reducing impeller stream The energy loss of fluid flowing in road so that whole mixed flow pump lift and efficiency improve a lot.
Through retrieval, it has been disclosed that patent CN201310412030.9 by blade rim is processed into mazy structure come Weaken wheel rim leakage stream and the leakage vortex of axial-flow pump.But, the method needs process a number of on relatively thin blade Zigzag labyrinth structure, difficulty of processing is relatively big, and fluid is the shortest through the time of labyrinth structure, and the consumption of kinetic energy is the most less, To weakening wheel rim leakage stream and the limited use of leakage vortex.Patent 201410385906.X by by cylindrical sleeve at axial-flow pump impeller On guarantee existence very close to each other between wheel rim and cylinder inner wall face, fundamentally avoid wheel rim leakage stream and leakage Whirlpool.But, the method just in axially become a mandarin and go out stream axial-flow hydraulic machinery, and for axially become a mandarin and oblique go out stream Mixed-flow pump be difficult to be suitable for.Therefore, it is necessary to design one can reduce mixed-flow pump rim clearance leakage stream and leakage vortex occurs Structures and methods.
Summary of the invention
For Shortcomings in prior art, the invention provides a kind of mixed-flow pump improving wheel rim leakage stream, weaken mixed The generation of stream pump blade wheel rim leakage stream, and then improve mixed flow pump lift and efficiency.
The present invention realizes above-mentioned technical purpose by techniques below means.
A kind of mixed-flow pump improving blade rim leakage stream, it is characterised in that include blade, impeller hub, runner envelope shell Body, stator, stator wheel hub, stator room housing, pump shaft, bearing, described blade is arranged on impeller hub;Impeller hub is by flat Keying is scheduled on pump shaft;Described blade, impeller hub are positioned at the runner envelope that runner envelope housing is constituted, and described blade rim is processed Having " dentation " square projection, described inner wall of runner chamber is machined with " dentation " square groove, and described " dentation " square projection stretches into institute State in " dentation " square groove, between wheel rim and the inwall of runner envelope housing of described blade, there is gap;Described stator is installed On stator wheel hub, stator wheel hub is arranged on pump shaft by bearing, and described stator, stator wheel hub are positioned at stator room housing and constitute Stator indoor, the wheel rim of described stator and the inwall of stator room housing are in close contact;Described runner envelope housing and stator room shell One end that body is connected is equipped with ring flange and is connected by described ring flange and the first bolt.
Further, the gap c between described " dentation " square protrusion and described " dentation " square groove1For 0.2mm~ 1mm。
Further, distance l between " dentation " square projection of described blade rim1For 5mm~10mm;Described runner Distance l between " dentation " square groove of chamber interior walls2For (l1+2*c1)mm;" dentation " that described inner wall of runner chamber is adjacent is square Distance l between groove3For 3mm~10mm.
Further, the height h of " dentation " square projection of described blade rim1" dentation " with described inner wall of runner chamber Degree of depth h of square groove2It is 0.5mm~2mm, and h1=h2
Further, the end face of the ring flange of described stator room housing being machined with annular seal grooves, described annular is close It is provided with O-ring seals in envelope groove.
Further, on the ring flange end face of described runner envelope housing, the part of close runner envelope has annular protrusion.
Further, described runner envelope housing includes runner envelope housing and lower runner envelope housing, described upper runner envelope shell The both sides of body and described lower runner envelope housing are equipped with for bolted gusset, and described gusset offers bolt hole, described Gusset is connected by the second bolt.
Further, described gusset is additionally provided with the pin-and-hole for location, described upper runner envelope housing and described lower runner Room housing is positioned by alignment pin.
Further, the end face that described upper runner envelope housing and described lower runner envelope housing connect is equal along inner end wall molded line Offer sealed groove;It is provided with rubber packing material in described sealed groove.
Beneficial effects of the present invention:
A kind of mixed-flow pump improving blade rim leakage stream of the present invention, by process at blade rim " dentation " square projection and " dentation " square groove processed at inner wall of runner chamber cooperate so that fluid is through mixed-flow pump Can there is bigger resistance during rim clearance, add the kinetic energy rejection of rim area fluid, thus reduce wheel rim leakage stream With the generation of leakage vortex, improve the hydraulic performance of mixed-flow pump.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of mixed-flow pump improving blade rim leakage stream of the present invention.
Fig. 2 is described blade rim district and inner wall of runner chamber face enlarged drawing.
Fig. 3 is described runner envelope body diagram.
Fig. 4 is described lower runner envelope housing three dimensional structure schematic diagram.
In figure:
1-blade, 2-impeller hub, 3-pump shaft, 4-bearing, 5-flat key, 6-ring flange, 7-stator, 8-stator wheel hub, 9- First bolt, 10-stator room housing, 11-O shape sealing ring, 12-" dentation " square projection, 13-" dentation " square groove, 14-turns Engineer room housing, 14a-upper runner envelope housing, runner envelope housing under 14b-, 15-the second bolt, 16-alignment pin, 17-gusset, 18- Sealed groove, 19-pin-and-hole.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is also It is not limited to this.
As it is shown in figure 1, a kind of mixed-flow pump improving blade rim leakage stream of the present invention, including wheel member, turn Engineer room housing 14, stator parts, stator room housing 10, pump shaft 3, bearing 4, described wheel member includes blade 1 and impeller hub 2, described blade 1 is arranged on impeller hub 2, and described stator parts include that stator 7 and stator wheel hub 8, described stator 7 are arranged on On stator wheel hub 8;Stator wheel hub 8 is arranged on pump shaft 3 by bearing 4, and impeller hub 2 is fixed on pump shaft 3 by flat key, leaf Wheel component is fixed on pump shaft 3 by flat key 5 and is rotated with pump shaft 3.Described stator 7, stator wheel hub 8 are positioned at stator room shell The stator that body 10 is constituted is indoor, and the wheel rim of described stator 7 and the inwall of stator room housing 10 are in close contact;Described blade 1, impeller Wheel hub 2 is positioned at the runner envelope that runner envelope housing 14 is constituted, and described blade 1 wheel rim is machined with " dentation " square protruding 12, described Inner wall of runner chamber is machined with " dentation " square groove 13, as in figure 2 it is shown, " dentation " of described blade 1 wheel rim square protruding 12 it Between distance l1For 5mm~10mm;Distance l between " dentation " square groove 13 of described inner wall of runner chamber2For (l1+2*c1) mm;Distance l between " dentation " square groove that described inner wall of runner chamber is adjacent3For 3mm~10mm.Described " dentation " is square convex Play 12 and stretch in described " dentation " square groove 13, between having between wheel rim and the inwall of runner envelope housing 14 of described blade 1 Gap;Gap c between described " dentation " square protrusion and described " dentation " square groove 131For 0.2mm~1mm.Described blade The height h of " dentation " square projection of wheel rim1Degree of depth h with " dentation " square groove of described inner wall of runner chamber2It is 0.5mm ~2mm, and h1=h2.One end that described stator room housing 10 is connected with runner envelope housing 14 is equipped with ring flange 6 and leads to Cross described ring flange 6 and the first bolt 9 connects.It is machined with ring packing on the end face of the ring flange 6 of described stator room housing 10 Groove, is provided with O-ring seals 11 in described annular seal grooves.On ring flange 6 end face of described runner envelope housing 14 close The part of runner envelope has annular protrusion.
As it is shown on figure 3, described runner envelope housing 14 includes runner envelope housing 14a and lower runner envelope housing 14b, described on The both sides of runner envelope housing 14a and described lower runner envelope housing 14b are equipped with for bolted gusset 17, on described gusset 17 Offering bolt hole, described gusset 17 is connected by the second bolt 15.The pin-and-hole 20 for location it is additionally provided with on described gusset 17, Described upper runner envelope 8a and described lower runner envelope 8b is positioned by alignment pin 16.
As shown in Figure 4, the end face that described upper runner envelope 8a and described lower runner envelope 8b connects all is opened along inner end wall molded line It is provided with sealed groove 18;It is provided with rubber packing material in described sealed groove 18.
Described embodiment be the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment, not In the case of deviating from the flesh and blood of the present invention, any conspicuously improved, the replacement that those skilled in the art can make Or modification belongs to protection scope of the present invention.

Claims (9)

1. the mixed-flow pump improving blade rim leakage stream, it is characterised in that include blade (1), impeller hub (2), runner Room housing (14), stator (7), stator wheel hub (8), stator room housing (10), pump shaft (3), bearing (4), described blade (1) is installed On impeller hub (2);Impeller hub (2) is fixed on pump shaft (3) by flat key (5);Described blade (1), impeller hub (2) Being positioned at the runner envelope that runner envelope housing (14) is constituted, described blade (1) wheel rim is machined with " dentation " square projection (12), described Inner wall of runner chamber is machined with " dentation " square groove (13), and it is square recessed that described " dentation " square projection (12) stretch into described " dentation " In groove (13), between wheel rim and the inwall of runner envelope housing (14) of described blade (1), there is gap;Described stator (7) is installed On stator wheel hub (8), stator wheel hub (8) is arranged on pump shaft (3) by bearing (4), described stator (7), stator wheel hub (8) Being positioned at the stator indoor that stator room housing (10) is constituted, the wheel rim of described stator (7) and the inwall of stator room housing (10) are tight Contact;One end that described runner envelope housing (14) is connected with stator room housing (10) is equipped with ring flange (6) and by described Ring flange (6) and the first bolt (9) connect.
The mixed-flow pump improving blade rim leakage stream the most according to claim 1, it is characterised in that described " dentation " is square Gap c between projection and described " dentation " square groove (13)1For 0.2mm~1mm.
The mixed-flow pump improving blade rim leakage stream the most according to claim 1, it is characterised in that described blade (1) is taken turns Distance l between " dentation " square projection (12) of edge1For 5mm~10mm;" dentation " square groove of described inner wall of runner chamber (13) distance l between2For (l1+2*c1)mm;Distance between " dentation " square groove (13) that described inner wall of runner chamber is adjacent l3For 3mm~10mm.
The mixed-flow pump improving blade rim leakage stream the most according to claim 1, it is characterised in that described blade (1) is taken turns The height h of " dentation " square projection (12) of edge1Degree of depth h with " dentation " square groove (13) of described inner wall of runner chamber2It is 0.5mm~2mm, and h1=h2
The mixed-flow pump improving blade rim leakage stream the most according to claim 1, it is characterised in that described stator room housing (10) being machined with annular seal grooves (18) on the end face of ring flange (6), described annular seal grooves is provided with O shape in (18) Sealing ring (11).
The mixed-flow pump improving blade rim leakage stream the most according to claim 1, it is characterised in that described runner envelope housing (14) on ring flange (6) end face, the part near runner envelope has annular protrusion.
The mixed-flow pump improving blade rim leakage stream the most according to claim 1, it is characterised in that described runner envelope housing (14) runner envelope housing (14a) and lower runner envelope housing (14b), described upper runner envelope housing (14a) and described lower turn are included The both sides of engineer room housing (14b) are equipped with for bolted gusset (17), and described gusset offers bolt hole on (17), described Gusset (17) is connected by the second bolt (15).
The mixed-flow pump improving blade rim leakage stream the most according to claim 7, it is characterised in that on described gusset (17) It is additionally provided with the pin-and-hole (19) for location, described upper runner envelope housing (14a) and described lower runner envelope housing (14b) by location Pin (16) location.
The mixed-flow pump improving blade rim leakage stream the most according to claim 7, it is characterised in that described upper runner envelope shell The end face that body (14a) and described lower runner envelope housing (14b) connect all offers sealed groove (18) along inner end wall molded line;Institute It is provided with rubber packing material in stating sealed groove (18).
CN201610855766.7A 2016-09-27 2016-09-27 A kind of mixed-flow pump improving blade rim leakage stream Pending CN106286382A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108374801A (en) * 2018-02-13 2018-08-07 西华大学 A kind of mixing pump blade wheel structure for pisciculture
CN108397417A (en) * 2018-02-13 2018-08-14 西华大学 A kind of blade wheel structure of mixing pump
CN109764000A (en) * 2019-02-25 2019-05-17 江苏大学 A kind of mixed-flow pump runner envelope with spiral shape pumping groove
CN109882448A (en) * 2019-02-25 2019-06-14 江苏大学 A kind of mixed-flow pump runner envelope with arc-shaped pumping groove

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108374801A (en) * 2018-02-13 2018-08-07 西华大学 A kind of mixing pump blade wheel structure for pisciculture
CN108397417A (en) * 2018-02-13 2018-08-14 西华大学 A kind of blade wheel structure of mixing pump
CN108397417B (en) * 2018-02-13 2020-07-03 西华大学 Impeller structure of mixed transportation pump
CN108374801B (en) * 2018-02-13 2020-07-28 西华大学 Mixed transportation pump impeller structure for fish farming
CN109764000A (en) * 2019-02-25 2019-05-17 江苏大学 A kind of mixed-flow pump runner envelope with spiral shape pumping groove
CN109882448A (en) * 2019-02-25 2019-06-14 江苏大学 A kind of mixed-flow pump runner envelope with arc-shaped pumping groove
CN109764000B (en) * 2019-02-25 2020-06-09 江苏大学 Mixed flow pump runner chamber with spiral pumping groove

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Application publication date: 20170104