CN107806445A - A kind of pump non-stationary flow guiding device - Google Patents
A kind of pump non-stationary flow guiding device Download PDFInfo
- Publication number
- CN107806445A CN107806445A CN201710899015.XA CN201710899015A CN107806445A CN 107806445 A CN107806445 A CN 107806445A CN 201710899015 A CN201710899015 A CN 201710899015A CN 107806445 A CN107806445 A CN 107806445A
- Authority
- CN
- China
- Prior art keywords
- guiding gutter
- import
- pump
- guiding
- impeller
- 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
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Abstract
The invention provides a kind of pump non-stationary flow guiding device, including some import guiding gutters, some middle part guiding gutters and some outlet guiding gutters；Region between housing and impeller body is set to impeller channel, and the import guiding gutter includes main pipeline and front end reflux line；The main pipeline is located at the impeller channel inlet edge；Described front end reflux line one end is connected with main pipeline, and the other end of the front end reflux line connects with pump chamber；Any middle part guiding gutter is located in the middle part of the impeller channel in housing；Any outlet guiding gutter is located at the impeller channel exit in housing；The center line radial equipartition of some import guiding gutters, some middle part guiding gutters and some outlet guiding gutters all along axle.The presence that the present invention can reduce blade further influences to caused by main flow, can greatly improve flow efficiency to effectively being improved phenomena such as backflow, vortex caused by diverse location during flowing.
Description
Technical field
The present invention relates to vane pump field, more particularly to a kind of pump non-stationary flow guiding device.
Background technology
When pump operation is in off-design behaviour, the flowing of fluid is very unstable, occurs before impeller/inducer import
Influence of phenomena such as backflow, vortex to main flow is particularly evident, generally, installs inducer before the impeller to improve the stream of pump
Dynamic performance, improves the flow stability of pump and the safe and reliable operation of unit.But sometimes only by reasonable selection inducer and its
The geometric parameter of his flow passage components can not still obtain reliable flow lift curve completely, therefore also need to rational structural measure
Effectively solves phenomena such as backflow, vortex of pump inlet leading edge.
In addition, when pump inlet pressure is reduced to certain value, it may appear that cavitation phenomenon, the generation of cavitation phenomenon can also cause
There is phenomena such as vibration, noise in flowing instability and unit, and the safe and reliable operation of unit is affected；Furthermore
When pump low flow rate condition operation caused by hump phenomenon will also result in flow instabilities state, these flow instabilities phenomenons
Pump chamber flow regime can be made to change, this change can be acted on impeller in the form of power, and influences the fortune of impeller with this
Row stationarity, can also make pump produce vibration, noise, pressure fluctuation phenomena such as.
The existing patent No. 201610371591.2, the patent of entitled " a kind of orifice throttle structure " propose a kind of orifice plate section
Flow structure, primary orifice plate, secondary orifice plate and the sleeve pipe of the structure are overall structure, when safeguarding replacing, only need to open flange
Disk then can take out the overall structure in the lump, multiple without repeated removal flange, and then lower orifice plate and torn open in installation
The purpose of labor intensity when unloading, in addition the orifice throttle structure, moreover it is possible to avoid that cavitation phenomenons occurs on orifice plate, while tieing up
Simplify the replacing flow of orifice plate during shield, reduce the use cost of throttling arrangement.But the patent is to the stream in pipeline by orifice plate
It is dynamic to carry out rectification, do not relate to carry out fluid before pump inlet the control and improvement of rectification.
The existing patent No. 201610127068.5, the patent of entitled " pipeline fairing " propose a kind of pipeline rectification dress
Put, media flow characteristic in the device combination pipe, change the flow behavior of incoming by placed inside rectification part, and pass through
The boundary layer disengaged position of flow passage components fluid is influenceed, single flow is split into a plurality of fluids and guides the flow direction of fluid, most
Conflux eventually and reach rectification effect, it is orderly and stably can to become unordered flowing for the device, reduces the energy that turbulence dissipates, convection current
The loss of energy is lacked, and then rectifies the effect of fluid flow performance.But the patent does not relate to how solve pump
The backflow of import leading edge, and improve the device of pump inlet flow regime.
In general, when pump operation is in off-design behaviour, the flowing instability of fluid in pump, often along with backflow, rotation
The wild effects such as whirlpool, strong influence is produced to main flow, the appearance of these flow instabilities can act on leaf in the form of power
On the flow passage components such as wheel, this can cause pump operation unstable, unit phenomena such as vibration, noise is occurred, in addition, flowing
There is hump in the unstable flow lift curve that can make pump, influences the normal work of pump；In addition, the change of pump flow condition may be used also
It can make pump that cavitation occur, phenomena such as appearance of cavitation can also make unit produce vibration, noise, have a strong impact on the stable of unit
Property and the economic loss of user.And the existing method for improving pump inlet backflow usually adds inducer before the impeller, but have
When only can not be completely secured by the geometric parameter of the flow passage components such as Rational choice inducer and obtain rational flow lift curve.
The content of the invention
, can be to leaf the invention provides a kind of pump non-stationary flow guiding device for Shortcomings in the prior art
Backflow, vortex and non-stationary flow before wheel or inducer are controlled, and the guiding gutter of the device is all vaneless, is reduced
The presence of blade further influences to caused by main flow, and the guiding gutter of the device is distributed in the different portions of flow region in addition
Position, it can greatly improve flowing to effectively being improved phenomena such as backflow, vortex caused by diverse location during flowing
Efficiency.
The present invention is to realize above-mentioned technical purpose by following technological means.
A kind of pump non-stationary flow guiding device, including some import guiding gutters, some middle part guiding gutters and some outlets
Guiding gutter；Region between housing and impeller body is set to impeller channel, and any import guiding gutter is in housing, the import
Guiding gutter includes main pipeline and front end reflux line；The main pipeline is located at the impeller channel inlet edge, passes through import
Guiding gutter connects pump chamber and impeller channel；Described front end reflux line one end is connected with main pipeline, the front end reflux line
The other end connects with impeller inlet extension；Any middle part guiding gutter is located in the middle part of the impeller channel in housing,
Pump chamber and impeller channel are connected by middle part guiding gutter；Any outlet guiding gutter is located at the impeller stream in housing
Road exit, pump chamber and impeller channel are connected by exporting guiding gutter；Some import guiding gutters, some middle part water conservancy diversion
Groove and it is some it is described outlet guiding gutter all along axle center line radial equipartition.
Further, the central axis of the import guiding gutter, middle part guiding gutter and outlet guiding gutter with the axle.
Further, the front end return duct other end in any import guiding gutter is to the distance of main pipeline import
(0.2~0.5) D1, wherein D1For impeller inlet diameter.
Further, the cross section of the import guiding gutter, the middle part guiding gutter and the outlet guiding gutter is rectangle,
And four side arc transition.
Further, if the inlet -duct area that the import guiding gutter is located in impeller channel is A51If the import guiding gutter
Discharge area within the cavity is A52；If the inlet -duct area that the middle part guiding gutter is located in impeller channel is A81It is if described
Guiding gutter discharge area within the cavity in middle part is A82；If the inlet -duct area that the outlet guiding gutter is located in impeller channel is
A91If outlet guiding gutter discharge area within the cavity is A92；Then：A52/A51=A82/A81=A92/A91=1.05-
1.1。
Further, in addition to straightener(stator) blade, the straightener(stator) blade are located between outlet and the pump discharge of impeller channel.
Further, the distance of the straightener(stator) blade to the pump discharge is (1.1~1.5) D2, wherein D2It is straight for pump discharge
Footpath.
Further, baffle plate is provided with the pump discharge, the baffle plate is located at straightener(stator) blade entrance, and the baffle plate is provided with
Uniform through hole.
The beneficial effects of the present invention are：
1. pump of the present invention non-stationary flow guiding device, pass through the guiding gutter provided with diverse location in 3, Ke Yi
The swirling flow of impeller blade import front end is largely eliminated, makes the flowing of the fluid in inflow main flow region more stable.
2. pump of the present invention non-stationary flow guiding device, middle part guiding gutter can eliminate fluid in flow process
Due to non-stationary flows such as the larger and caused backflow of impeller channel changes of section, vortexs, make motion of the fluid in runner more
Stably, phenomena such as reducing the unit vibration brought by flowing instability, noise.
3. pump of the present invention non-stationary flow guiding device, the straightener(stator) blade in exit can disappear to a certain extent
Except the rotary motion of trickle, flow regime of the fluid when flowing into next flow passage components is become steady, further keep away
Exempt from the hydraulic loss that vortex, backflow, Secondary Flow etc. as caused by flow of fluid are brought.
4. pump of the present invention non-stationary flow guiding device, the device can improve the operation of pump to a certain extent
Stability, the operation for making pump also to stablize in low flow rate condition, obtains stable flow lift curve.
Brief description of the drawings
Fig. 1 is pump non-stationary flow guiding device structural representation of the present invention.
Fig. 2 is that pump of the present invention flows to schematic diagram with non-stationary flow guiding device.
Fig. 3 is the straightener(stator) blade location drawing of the present invention.
In figure：
1- axles；2- impeller bodies；3- impeller channels；4- housings；5- import guiding gutters；6- front ends return duct；7- main pipelines；8-
Middle part guiding gutter；9- exports guiding gutter；10- straightener(stator) blades；11- pump discharges；12- baffle plates.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
As shown in figure 1, a kind of pump non-stationary flow guiding device, including some import guiding gutters 5, some middle part guiding gutters
8 and it is some outlet guiding gutter 9；Region between housing 4 and impeller body 2 is set to impeller channel 3, any import guiding gutter 5
In housing 4, the import guiding gutter 5 includes main pipeline 7 and front end reflux line 6；The main pipeline 7 is located at the impeller stream
At the inlet edge of road 3, pump chamber and impeller channel 3 are connected by import guiding gutter 5；Described one end of front end reflux line 6 and supervisor
Road 7 connects, and the other end of the front end reflux line 6 connects with pump chamber；Any middle part guiding gutter 8 is in housing 4, and position
In the middle part of impeller channel 3, pump chamber and impeller channel 3 are connected by middle part guiding gutter 8；Any outlet guiding gutter 9 exists
In housing 4, and it is located at the exit of impeller channel 3, pump chamber and impeller channel 3 is connected by exporting guiding gutter 9；It is some described
Import guiding gutter 5, some middle part guiding gutters 8 and some outlet guiding gutters 9 are radially equal all along the center line of axle 1
Cloth.The central axis of the import guiding gutter 5, middle part guiding gutter 8 and outlet guiding gutter 9 with the axle 1.The present invention can be with
Reduce the presence of blade further influences to caused by main flow, and the guiding gutter of the device is distributed in flow region not in addition
Same position, can greatly it be improved to effectively being improved phenomena such as backflow, vortex caused by diverse location during flowing
Flow efficiency.
Operation principle is：Fluid flows through impeller channel 3 by import, and before impeller channel 3 is not flowed into, the flowing of fluid is
It is stable, when fluid enters impeller channel 3, due to the interference of impeller blade, now due to the interference of impeller blade convection body,
The flow regime of fluid can change, and can now produce the non-stationary flow phenomenon of swirling flow, Secondary Flow etc.；Pass through import
The presence of guiding gutter 5 so that caused non-stationary flow can flow away through import guiding gutter 5, because pump is during real-world operation, stream
Amount fluctuation it is larger, therefore the fluid flow for flowing into main pipeline 7 be also it is uncertain, when flow through the fluid flow at this it is excessive when,
Front end reflux line 6, which can be shared, carrys out the flow of main pipeline 7 in import guiding gutter 5；During flow of fluid, due to impeller leaf
Plate shape can fluid flow produce interference, especially when the runner intermediate region that impeller blade cross sectional shape changes greatly, by
In the change of cross section of fluid channel product, fluid stream is out-of-date, the swirling flow that the degree that can produce differs, now, due to middle part guiding gutter be present
8, it can be very good to eliminate the swirling flow at the main flow, make the flowing of fluid more stable, reduce because flowing is unstable in the middle part of runner
Surely phenomena such as unit vibration that brings, noise；The operation principle of impeller channel outlet guiding gutter can similarly be drawn.
The other end of front end return duct 6 in any import guiding gutter 5 to the distance of the import of main pipeline 7 be (0.2
~0.5) D1, wherein D1For impeller inlet diameter.The import guiding gutter 5, the middle part guiding gutter 8 and the outlet guiding gutter 9
Cross section be rectangle, and four side arc transitions.If the inlet -duct area that the import guiding gutter 5 is located in impeller channel 3 is
A51If the import guiding gutter 5 discharge area within the cavity is A52；If the middle part guiding gutter 8 is located at impeller channel 3
Interior inlet -duct area is A81If the middle part guiding gutter 8 discharge area within the cavity is A82；If the outlet guiding gutter 9
Inlet -duct area in impeller channel 3 is A91If the outlet guiding gutter 9 discharge area within the cavity is A92；Then：
A52/A51=A82/A81=A92/A91=1.05-1.1.
Also include straightener(stator) blade 10, the straightener(stator) blade 10 is located between outlet and the pump discharge 11 of impeller channel 3.It is described
The distance of straightener(stator) blade 10 to the pump discharge 11 is (1.1~1.5) D2, wherein D2For the diameter of pump discharge 11.The pump discharge 11
Interior to be provided with baffle plate 12, the baffle plate 12 is located at the entrance of straightener(stator) blade 10, and the baffle plate 12 is provided with uniform through hole.Work as fluid
When exporting outflow by impeller blade, due to the change of fluid flow direction, the shakinesses such as different degrees of vortex, backflow are will also result in
Determine flow phenomenon, the through hole on baffle plate 12 can preferably eliminate the non-stationary flow in the flowing, make fluid next in inflow
Flow regime during flow passage components becomes steady.
The guiding device that present embodiment provides can effectively eliminate backflow and the bumpy flow appeared in flow process
Deng flow instabilities, in addition by the rectified action of the guiding device, going out for cavitation phenomenon can also be prevented to a certain extent
It is existing, ensure the steady flow of mainstream channel fluid, improve the cavitation performance of pump, pump is also obtained in low flow rate condition well
Flow stability, in addition by the rectified action of the device, the stability and reliability of pump assembly operation can be improved.
The embodiment is preferred embodiment of the invention, but the present invention is not limited to above-mentioned embodiment, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (8)
1. a kind of pump non-stationary flow guiding device, it is characterised in that including some import guiding gutters (5), some middle part water conservancy diversion
Groove (8) and some outlet guiding gutters (9)；Region between housing (4) and impeller body (2) is set to impeller channel (3), any described
For import guiding gutter (5) in housing (4), the import guiding gutter (5) includes main pipeline (7) and front end reflux line (6)；It is described
Main pipeline (7) is located at the impeller channel (3) inlet edge, and pump chamber and impeller channel are connected by import guiding gutter (5)
(3)；Described front end reflux line (6) one end is connected with main pipeline (7), the other end and impeller of the front end reflux line (6)
Import extension connects；
Any middle part guiding gutter (8) passes through middle part guiding gutter in housing (4), and in the middle part of the impeller channel (3)
(8) pump chamber and impeller channel (3) are connected；Any outlet guiding gutter (9) is located at the impeller channel in housing (4)
(3) exit, pump chamber and impeller channel (3) are connected by exporting guiding gutter (9)；Some import guiding gutters (5), Ruo Gansuo
State the center line radial equipartition of middle part guiding gutter (8) and some outlet guiding gutters (9) all along axle (1).
2. pump according to claim 1 non-stationary flow guiding device, it is characterised in that the import guiding gutter (5), in
The central axis of portion's guiding gutter (8) and outlet guiding gutter (9) with the axle (1).
3. pump according to claim 1 non-stationary flow guiding device, it is characterised in that any import guiding gutter
(5) front end return duct (6) other end in the distance of main pipeline (7) import be (0.2~0.5) D1, wherein D1For impeller
Inlet diameter.
4. pump according to claim 1 non-stationary flow guiding device, it is characterised in that the import guiding gutter (5), institute
It is rectangle to state middle part guiding gutter (8) and the cross section for exporting guiding gutter (9), and four side arc transitions.
5. pump according to claim 1 non-stationary flow guiding device, it is characterised in that set the import guiding gutter (5)
Inlet -duct area in impeller channel (3) is A51If the import guiding gutter (5) discharge area within the cavity is A52；
If the inlet -duct area that the middle part guiding gutter (8) is located in impeller channel (3) is A81If the middle part guiding gutter (8) is located at chamber
Internal discharge area is A82；If the inlet -duct area that the outlet guiding gutter (9) is located in impeller channel (3) is A91It is if described
It is A to export guiding gutter (9) discharge area within the cavity92；Then：
A52/A51=A82/A81=A92/A91=1.05-1.1.
6. pump according to claim 1 non-stationary flow guiding device, it is characterised in that also including straightener(stator) blade (10),
The straightener(stator) blade (10) is located between the outlet of impeller channel (3) and pump discharge (11).
7. pump according to claim 1 non-stationary flow guiding device, it is characterised in that the straightener(stator) blade (10) arrives institute
The distance for stating pump discharge (11) is (1.1~1.5) D2, wherein D2For pump discharge (11) diameter.
8. pump according to claim 6 non-stationary flow guiding device, it is characterised in that be provided with the pump discharge (11)
Baffle plate (12), the baffle plate (12) are located at straightener(stator) blade (10) entrance, and the baffle plate (12) is provided with uniform through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710899015.XA CN107806445A (en) | 2017-09-28 | 2017-09-28 | A kind of pump non-stationary flow guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710899015.XA CN107806445A (en) | 2017-09-28 | 2017-09-28 | A kind of pump non-stationary flow guiding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107806445A true CN107806445A (en) | 2018-03-16 |
Family
ID=61591939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710899015.XA Pending CN107806445A (en) | 2017-09-28 | 2017-09-28 | A kind of pump non-stationary flow guiding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107806445A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6699008B2 (en) * | 2001-06-15 | 2004-03-02 | Concepts Eti, Inc. | Flow stabilizing device |
| CN202883428U (en) * | 2012-07-13 | 2013-04-17 | 襄樊五二五泵业有限公司 | Pressure relief mechanism for pump rectangular ring groove structure |
| US20130121804A1 (en) * | 2011-11-14 | 2013-05-16 | Concepts Eti, Inc. | Fluid Movement System and Method for Determining Impeller Blade Angles for Use Therewith |
-
2017
- 2017-09-28 CN CN201710899015.XA patent/CN107806445A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6699008B2 (en) * | 2001-06-15 | 2004-03-02 | Concepts Eti, Inc. | Flow stabilizing device |
| US20130121804A1 (en) * | 2011-11-14 | 2013-05-16 | Concepts Eti, Inc. | Fluid Movement System and Method for Determining Impeller Blade Angles for Use Therewith |
| CN202883428U (en) * | 2012-07-13 | 2013-04-17 | 襄樊五二五泵业有限公司 | Pressure relief mechanism for pump rectangular ring groove structure |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180316 |
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