CN201246343Y - Novel spiral casing flow passage high efficiency pump device - Google Patents
Novel spiral casing flow passage high efficiency pump device Download PDFInfo
- Publication number
- CN201246343Y CN201246343Y CNU2007201773271U CN200720177327U CN201246343Y CN 201246343 Y CN201246343 Y CN 201246343Y CN U2007201773271 U CNU2007201773271 U CN U2007201773271U CN 200720177327 U CN200720177327 U CN 200720177327U CN 201246343 Y CN201246343 Y CN 201246343Y
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- China
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- spiral case
- outlet
- pump
- spiral casing
- high efficiency
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Abstract
The utility model provides a novel high-efficiency pump unit of a spiral casing channel, which is applicable to vertical-spindle large propeller pumps and guide-vane mixed flow pumps. The novel spiral casing channel is specially designed for water inlet and outlet of the novel high-efficiency pump unit, and characterized in that the plane widths of the spiral casing sections of the spiral casing inlet channel and the spiral casing outlet channel are larger than the net widths of the straight-line sections of the inlet and the outlet respectively. Compared with the conventional pump unit, the novel pump unit not only is favorable for reducing the deep excavation of the engineering foundation, but also ensures convenient construction, installation and maintenance and saves the engineering quantity and investment; and meanwhile, the novel spiral casing channel is also favorable for reducing the hydraulic loss and can greatly improve the efficiency of the pump unit.
Description
1. technical field
The utility model is a kind of novel spiral case runner high efficiency pump-unit.Novel volute type runner is adopted in novel spiral case runner high efficiency pump-unit water inlet, and novel volute type runner is also adopted in water outlet; Novel spiral case runner high efficiency pump-unit mainly is applicable to large-scale axial-flow pump of vertical shaft type low lift and guide vane mixed flow pump pump station engineering.
2. background technique
The low lift magna pump is installed pattern vertical shaft type, axle horizontal type, clino-axis type and tubular etc., and wherein the vertical shaft type pump disposes different water-in and water-out runners and forms multiple pump-unit pattern again.Domestic built 300 surplus a low lift large pumping station substantially all use the vertical shaft pump, its water inlet flow channel adopts the knee bend formula more; Outlet passage has bend pipe-straighttube-type and bend pipe-siphon tube type.According to pumping plant technical development and practice, it is fully feasible that the volute type runner is all adopted in water inlet of vertical shaft type magna pump and water outlet.With conventional vertical shaft type pump-unit and comparing with the axle horizontal type tubular pump, adopt the pump-unit of spiral case water inlet, spiral case water outlet, following outstanding advantage is arranged: 1. runner-type line is simple, easy construction.2. embedded depth of foundation is little.D is a radix with the pump impeller diameter, and the body base plate of standing can be raised more than the 0.5D.3. the pump axial dimension is short.With pump impeller diameter D is radix, can shorten more than the 0.5D usually.4. the pump housing can adopt the structure of loosing core, and can hang out from outlet passage integral body easily, and it is convenient to install, overhaul.5. reach with bend pipe-syphon tube outlet passage scheme and compare with the through-flow pump scheme, the Parallel to the flow direction size is short.With pump impeller diameter D is radix, can shorten (3～5) D even more usually.6. novel spiral case runner high efficiency pump-unit is compared with conventional vertical shaft type pump-unit and tubular pump, pumping plant under water the civil structural engineering amount and the investment can save more than 1/5.
3. summary of the invention
According to the test actual measurement, the knee bend water inlet flow channel of appropriate design is a bit larger tham in the hydraulic loss of conventional spiral case water inlet flow channel; The hydraulic loss of conventional spiral case outlet passage is also greater than the bend pipe-straighttube-type or the bend pipe-siphon tube type outlet passage of appropriate design.But according to test and analysis, the hydraulic loss of spiral case water inlet flow channel mainly is the loss of spiral case section, and reducing hydraulic loss can be by improving molded lines and enlarging the section realization; The hydraulic loss of spiral case outlet passage mainly is and spiral case segment type line, the closely-related pump discharge divergence loss of size, secondly is the loss of runner exit section.Reducing pump discharge divergence loss emphasis is diffusing tube behind the pump stator, flow deflecting cone appropriate design and optimization; Simultaneously, it is remarkable suitably to enlarge the flow section effect.The utility model spiral case water-in and water-out runner major character: water-in and water-out runner spiral case section plane width is respectively greater than import and outlet section runner clear span; Form annular convergent flow channels between pump suction chamber water guide cone and the oviduct; Pump and form annular flaring flow channels between hydroecium water guide cone and the oviduct.The design method of the utility model spiral case water inlet flow channel is: keeping under the constant condition of width of flow path, spiral case section camber line radius of curvature is strengthened,, reduce cylindricality cross-sectional flow under spiral case section and the oviduct to strengthen suction oviduct diameter, improve the pump inlet fluidised form, reduce hydraulic loss.By the pumping plant structural analysis as can be known, strengthen snail volute section radius of curvature, to dividing pier rigidity, intensity did not influence in the multicomputer pumping plant, but flow section obviously strengthens.The design method of the utility model spiral case outlet passage is: keeping under the constant condition of width of flow path, with the increasing of spiral case section camber line radius of curvature, to strengthen diffuser pipe diameter, reduce diffusing tube outlet and spiral case cross-sectional flow, reduce hydraulic loss.Through the checking of highi degree of accuracy dedicated experiments platform model test, novel spiral case runner pump-unit is with impeller diameter D=0.3m model pump water-in and water-out flow passage resistance force of waterproof loss coefficient S
m(s
2/ m
5) weigh, its numerical value can reduce to 3.5～4.0 by 6.0～8.0; Adopt under outstanding hydraulic model, normal width of flow path, the net lift 5m left and right sides condition, D=0.3m model pump unit efficiency can improve 3～4%, can reach 79～80%, near or reach the straight mobile desirable efficiency index of tubular pump.
4. description of drawings
Fig. 1 is novel spiral case water inlet flow channel figure, and top (1) is sectional drawing, and bottom (2) are planimetric map; Fig. 2 is novel spiral case outlet passage figure, and top (1) is sectional drawing, and bottom (2) are planimetric map; Fig. 3 is a spiral case inlet and outlet channel pump-unit schematic representation, L among the figure
s, L
dExpression water inlet respectively, outlet passage segment length, ▽
0～▽
5Expression corresponding site elevation, D, D
1Represent upper and lower horn mouth diameter respectively.
5. embodiment
Contrast spiral case inlet and outlet channel pump-unit schematic representation (accompanying drawing 3), the design method of the utility model spiral case outlet passage also is: runner straightway diapire is suitably had a down dip, to add the large outlet section, reduce hydraulic loss, improve pump assembly efficiency.
Paint the type design about spiral case water inlet flow channel and spiral case outlet passage, can realize that with mathematical expression commonly used, ripe on the engineering and computational methods and special-purpose software computer goes out construction details fast or makes optimal design.
Claims (4)
1. a novel spiral case inlet and outlet channel high efficiency pump-unit is characterized in that: adopt novel spiral case water inlet flow channel and adopt novel spiral case outlet passage simultaneously; Spiral case water inlet flow channel and spiral case outlet passage spiral case section plane width are respectively greater than water intake and water outlet place runner clear span.
2. by the described novel spiral case inlet and outlet channel high efficiency pump-unit of claim 1, it is characterized in that: water inlet flow channel spiral case section has water guide cone; Form annular convergent flow channels between water guide cone and the oviduct.
3. by the described novel spiral case inlet and outlet channel high efficiency pump-unit of claim 1, it is characterized in that: the outlet of outlet passage pump stator has the cumulative loudspeaker cast diffusing tube of section.
4. by the described novel spiral case inlet and outlet channel high efficiency pump-unit of claim 1, it is characterized in that: the water guide cone of steel structure is arranged in the pump stator exit cone, and the face of loudspeaker cast diffusing tube and water guide cone forms annular flaring flow channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201773271U CN201246343Y (en) | 2007-09-18 | 2007-09-18 | Novel spiral casing flow passage high efficiency pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201773271U CN201246343Y (en) | 2007-09-18 | 2007-09-18 | Novel spiral casing flow passage high efficiency pump device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201246343Y true CN201246343Y (en) | 2009-05-27 |
Family
ID=40730165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201773271U Expired - Fee Related CN201246343Y (en) | 2007-09-18 | 2007-09-18 | Novel spiral casing flow passage high efficiency pump device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201246343Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047185A (en) * | 2012-12-22 | 2013-04-17 | 扬州大学 | Beveled bidirectional vertical pump device |
| CN103790838A (en) * | 2014-02-13 | 2014-05-14 | 扬州大学 | Two-way low lift water pumping device shaped like Omega in Greek letters |
| CN104179689A (en) * | 2013-05-20 | 2014-12-03 | 株式会社日立制作所 | Draw-out type vertical-shaft pump |
-
2007
- 2007-09-18 CN CNU2007201773271U patent/CN201246343Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047185A (en) * | 2012-12-22 | 2013-04-17 | 扬州大学 | Beveled bidirectional vertical pump device |
| CN103047185B (en) * | 2012-12-22 | 2015-09-02 | 扬州大学 | The two-way vertical pump device of umbrella shape |
| CN104179689A (en) * | 2013-05-20 | 2014-12-03 | 株式会社日立制作所 | Draw-out type vertical-shaft pump |
| CN103790838A (en) * | 2014-02-13 | 2014-05-14 | 扬州大学 | Two-way low lift water pumping device shaped like Omega in Greek letters |
| CN103790838B (en) * | 2014-02-13 | 2016-01-20 | 扬州大学 | The two-way humble lift water plug of Ω shape |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Yan Dengfeng Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Yan Dengfeng Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20120918 |