CN204692104U - A kind of axial-flow pump of non-diffusing runner - Google Patents
A kind of axial-flow pump of non-diffusing runner Download PDFInfo
- Publication number
- CN204692104U CN204692104U CN201520353724.4U CN201520353724U CN204692104U CN 204692104 U CN204692104 U CN 204692104U CN 201520353724 U CN201520353724 U CN 201520353724U CN 204692104 U CN204692104 U CN 204692104U
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- China
- Prior art keywords
- runner
- straight length
- guide vane
- exit guide
- outlet pipe
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of axial-flow pump of non-diffusing runner, comprise intake pipe, runner and outlet pipe, also exit guide vane is furnished with on rear side of described runner, described outlet pipe is divided into three sections, first paragraph is front straight length, and second segment is bend loss, and the 3rd section is rear straight tube, connect exit guide vane on front side of described front straight length, the internal diameter of described front straight length, the internal diameter of each section of bend loss are identical with the internal diameter of rear straight length.The utility model structure is simple, intakes straight, even; Exit guide vane can rotate by own axes, can reduce pump impeller outlet circulation, improve flow regime of impeller outflow, more obvious under low flow rate condition especially; The front straight length that outlet pipe inlet connects exit guide vane is cylindrical straight tube runner, crosses water even, reduces hydraulic loss; Current flow to and change after Discharging bent-tube section, and after outlet pipe last section, straight length is designed to cylindrical straight tube, make velocity flow profile even, thus avoid wall secondary back, unit efficiency is increased.
Description
Technical field
The utility model belongs to Fluid Machinery and Engineering equipment technical field, particularly a kind of axial-flow pump of non-diffusing runner.
Background technique
Axial-flow pump is obtained in each department of national economy and various field and applies widely.In farmland discharging-irrigating, the irrigation in fritter field adopts middle-size and small-size axial-flow pump, controls flood and drains flooded fields, adopts Large Axial Flow Pump; In water conservancy construction, power station cooling steam turbine condensation circulating water adopts axial-flow pump; In industrial water, as TECHNIQUE TO LARGE INTEGRATED STEEL WORKS process water and dock seawater, usually all adopt axial-flow pump; In chemical industry, in some device, also extensively adopt axial-flow pump.
In recent years, for meeting the needs of Deposits in Eastern Coastal China hypsography low-lying area irrigation and drainage industry and " south water to north " East Route Project, the axial-flow pump of low lift, large discharge is widely adopted.Axial-flow pump is made up of the large parts of intake pipe, runner, exit guide vane and outlet pipe 4 usually, and whole flow channels comprises water inlet flow channel, pump inner flow passage and outlet passage.By the research each flow passage components matching problem of axial-flow pump and the molded line optimization of flow channels, to the safety of pump-unit, Effec-tive Function, there is important theory and directive significance.Therefore, the hydraulic performance and the security and stability that how to improve axial-flow pump further have become important research topic.
In the axial-flow pump of routine, outlet pipe is often designed to divergent contour, and the object of design is like this to reduce exit velocity, the energy thus absorb a part of kinetic energy of increasing export.But find after deliberation, when exporting as divergent contour pipeline, although flow velocity reduces, having reclaimed portion of energy, having occurred backflow at tube wall place, make hydraulic loss in outlet pipe increase, the efficiency of device decreases on the contrary.
Model utility content
The utility model is in order to solve the defect and deficiency that exist in above-mentioned prior art, provide one and can reduce pump impeller outlet circulation, improve flow regime of impeller outflow, water outlet pipe part hydraulic loss can also be reduced and avoid water outlet pipe part wall secondary back, improve the axial-flow pump of the non-diffusing runner of overall water pumping efficiency.
The technical solution of the utility model: a kind of axial-flow pump of non-diffusing runner, the outlet pipe comprising intake pipe, be connected to the runner on rear side of intake pipe and be connected on rear side of runner, also exit guide vane is furnished with on rear side of described runner, described outlet pipe is divided into three sections, first paragraph is front straight length, and second segment is bend loss, and the 3rd section is rear straight tube, connect exit guide vane on front side of described front straight length, the internal diameter of described front straight length, the internal diameter of each section of bend loss are identical with the internal diameter of rear straight length.
In the utility model, the mounting type of the parts such as intake pipe, runner, exit guide vane and outlet pipe vertical axial-flow pump part is routinely arranged.
Preferably, described intake pipe is contractibility Taper Pipe, the runner-type line even variation of intake pipe.
Preferably, the quantity of described exit guide vane is identical with the blade quantity of runner, is 6, and exit guide vane entirety is in aerofoil profile, can rotate around own axes.
The Airfoil Design of exit guide vane in the utility model, and can rotate by own axes, pump impeller outlet circulation can be reduced, improve flow regime of impeller outflow, more obvious under low flow rate condition especially; The passage of exit guide vane section is cylindrical straight tube, rear connected water outlet pipe.
Preferably, described front straight length and rearmounted pipeline section are hollow circuit cylinder section.
The utility model compared with prior art, has the following advantages: inlet tube is for shrinking shape Taper Pipe, and structure is simple, intakes straight, even; Exit guide vane can rotate by own axes, can reduce pump impeller outlet circulation, improve flow regime of impeller outflow, more obvious under low flow rate condition especially; The front straight length that outlet pipe inlet connects exit guide vane is cylindrical straight tube runner, crosses water even, reduces hydraulic loss; Current flow to and change after Discharging bent-tube section, and after outlet pipe last section, straight length is designed to cylindrical straight tube, make velocity flow profile even, thus avoid wall secondary back, unit efficiency is increased.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the aerofoil profile schematic diagram of exit guide vane in the utility model;
Fig. 3 is the schematic diagram of outlet pipe passage in the utility model.
1. intake pipes, 2. runner, 3. exit guide vane, 4. outlet pipe in figure, straight length before I., II. bend loss, straight length after III..
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but is not the restriction to the utility model protection domain.
As Figure 1-3, a kind of axial-flow pump of non-diffusing runner, comprises intake pipe 1, runner 2, exit guide vane 3, outlet pipe 4 successively according to water (flow) direction, and intake pipe 1, runner 2, exit guide vane 3, outlet pipe 4 are all arranged by vertical axial-flow pump part.
Exit guide vane 3 is in aerofoil profile, and it is arranged between runner 2 and outlet pipe 4, and the quantity of exit guide vane 3 is identical with the blade quantity of runner 2, is 6, and exit guide vane 3 can rotate adjustment aperture around own axes.
Outlet pipe 4 is divided into three sections, and first paragraph is front straight length I, connects the outlet of exit guide vane 3 before it; Second segment is bend loss II, and it changes the moving direction of current; 3rd section is rear straight length III, and it guides uniform fluid flow to flow out.
Water, in running, is sent into runner by intake pipe by axial-flow pump, and the current after runner work guide to outlet pipe by exit guide vane.After runner, exit guide vane is installed, its effect reduces annular liquid flow at the runner exit, reclaim circular rector kinetic energy, the fluidised form of outlet of rotary wheel can be improved, water is caused outlet pipe uniformly, particularly especially obvious under low flow rate condition, outer pipe is divided into three sections to be respectively front straight length, bend loss and rear straight length, non-diffusing type made by outlet pipe, namely front straight length and rear straight length are cylindrical, each cross-sectional area of bend loss remains unchanged, although diffused outlet pipe reduces exit velocity to a certain extent, recovery section energy, but easily cause wall secondary back, outlet pipe is designed to non-diffusing type by the utility model, velocity flow profile is even, avoid secondary back, thus the hydraulic loss reduced in outlet pipe, improve the whole efficiency of device.
Claims (4)
1. the axial-flow pump of a non-diffusing runner, the outlet pipe comprising intake pipe, be connected to the runner on rear side of intake pipe and be connected on rear side of runner, it is characterized in that: on rear side of described runner, be also furnished with exit guide vane, described outlet pipe is divided into three sections, first paragraph is front straight length, and second segment is bend loss, and the 3rd section is rear straight tube, connect exit guide vane on front side of described front straight length, the internal diameter of described front straight length, the internal diameter of each section of bend loss are identical with the internal diameter of rear straight length.
2. the axial-flow pump of a kind of non-diffusing runner according to claim 1, is characterized in that: described intake pipe is contractibility Taper Pipe, the runner-type line even variation of intake pipe.
3. the axial-flow pump of a kind of non-diffusing runner according to claim 1, is characterized in that: the quantity of described exit guide vane is identical with the blade quantity of runner, is 6, and exit guide vane entirety is in aerofoil profile, can rotate around own axes.
4. the axial-flow pump of a kind of non-diffusing runner according to claim 1, is characterized in that: described front straight length and rearmounted pipeline section are hollow circuit cylinder section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520353724.4U CN204692104U (en) | 2015-05-28 | 2015-05-28 | A kind of axial-flow pump of non-diffusing runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520353724.4U CN204692104U (en) | 2015-05-28 | 2015-05-28 | A kind of axial-flow pump of non-diffusing runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204692104U true CN204692104U (en) | 2015-10-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520353724.4U Expired - Fee Related CN204692104U (en) | 2015-05-28 | 2015-05-28 | A kind of axial-flow pump of non-diffusing runner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204692104U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223396A (en) * | 2017-12-11 | 2018-06-29 | 中国水利水电科学研究院 | A kind of high-precision water pump bath scaled model experimental device |
-
2015
- 2015-05-28 CN CN201520353724.4U patent/CN204692104U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223396A (en) * | 2017-12-11 | 2018-06-29 | 中国水利水电科学研究院 | A kind of high-precision water pump bath scaled model experimental device |
| CN108223396B (en) * | 2017-12-11 | 2024-04-26 | 中国水利水电科学研究院 | High-precision water pump model experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 |