CN104329293A - Eddy current confinement centrifugal pump pumping chamber and centrifugal pump with same - Google Patents
Eddy current confinement centrifugal pump pumping chamber and centrifugal pump with same Download PDFInfo
- Publication number
- CN104329293A CN104329293A CN201410447324.XA CN201410447324A CN104329293A CN 104329293 A CN104329293 A CN 104329293A CN 201410447324 A CN201410447324 A CN 201410447324A CN 104329293 A CN104329293 A CN 104329293A
- Authority
- CN
- China
- Prior art keywords
- centrifugal pump
- pumping chamber
- eddy current
- diffuser
- jet flow
- 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.)
- Granted
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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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
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- 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 discloses an eddy current confinement centrifugal pump pumping chamber and a centrifugal pump with the same. In the eddy current confinement centrifugal pump pumping chamber, jet grooves are uniformly formed in the inner wall of a diffusing section of the pumping chamber along the circumference; the length direction of the jet grooves is parallel to the flow line of the diffusing section of the pumping chamber. The jet groove structure produces a micro jet by using adverse pressure gradient in the diffusing section of the pumping chamber, and the micro jet is mixed with a main flow in the diffusing section of the pumping chamber to reduce the eddy current intensity in the diffusing section and confine eddy current development in the diffusing section, so that the stability for operation of the centrifugal pump is improved; meanwhile the micro jet has extremely small influence on the main flow in the diffusing section of the pumping chamber and also has extremely influence on the operation efficiency of the centrifugal pump. The eddy current confinement centrifugal pump pumping chamber has a simple structure, is easy to machine and manufacture and is applicable to any type of centrifugal pump.
Description
Technical field
The present invention relates to centrifugal pump technical field, be specifically related to a kind ofly suppress the centrifugal pump pumping chamber of eddy current and there is its centrifugal pump.
Background technique
Before the nineties in 20th century, the research about centrifugal pump often concentrates on energy response.In recent years, along with centrifugal pump group keeps the large-scale development, particularly the energy response of unit reaches preferably after level, and centrifugal pump group operation stability more and more comes into one's own.At present, some magna pump units run of going into operation have occurred the phenomenon that noise in various degree, vibration etc. are relevant with hydraulic instability having had a strong impact on the safe operation of unit.
Model test and field observation show, the unsteady flo w eddy current that the noise of centrifugal pump group, vibration come from flow passage components and the structural vibration that eddy current causes.Centrifugal pump pumping chamber collects the fluid flowed out from impeller, converts a part of kinetic energy of fluid to pressure energy.Pumping chamber is inner, and due to the existence of adverse pressure gradient and geometric buckling, fluid is along curved trajectory.In diffuser, due to the effect in boundary layer, form Secondary Flow in runner, this fluidal texture spreads to downstream, and result in the eddy current that in pumping chamber diffuser, flowing performance is complicated, this fluidal texture is unstable, time-dependent.Unsteady flo w eddy current in pumping chamber diffuser is the key factor affecting pump assembly detection and stable operation.
Control to be more emerging research to eddy current in pumping chamber diffuser.The jet flow groove structure that this patent proposes is the effective way suppressing centrifugal pump pumping chamber diffuser eddy current, raising pump assembly stable.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of centrifugal pump pumping chamber, and this pumping chamber can suppress the development of eddy current in diffuser, improves the stability that centrifugal pump runs.
In view of this, the centrifugal pump pumping chamber of the suppression eddy current of first aspect present invention embodiment, the diffuser inwall of described centrifugal pump pumping chamber is along the circumferential direction evenly arranged jet flow groove, and the length direction of described jet flow groove is parallel to the streamline of described diffuser.
The beneficial effect of the centrifugal pump pumping chamber of the suppression eddy current of the embodiment of the present invention is: jet flow groove structure utilizes the adverse pressure gradient in pumping chamber diffuser to produce microjet, microjet mixes with main flow in pumping chamber diffuser, reduce strength of vortex in diffuser, suppress eddy current development in diffuser, thus improve centrifugal pump operation stability; Meanwhile, microjet is very little on main flow impact in pumping chamber diffuser, also very little on the impact of centrifugal pump operational efficiency.The centrifugal pump pressurized water chamber structure of the suppression eddy current of the embodiment of the present invention is simple, and easily processing and manufacture, be applicable to the centrifugal pump of any type.
In one embodiment of the invention, on the cross section perpendicular to described diffuser axis, described jet flow groove shape is rectangle.
In one embodiment of the invention, with described diffuser wall thickness δ for reference, the span of the described jet flow groove degree of depth is
with described diffuser inwall girth C for reference, the span of described jet flow groove width is
flow to length L for reference with described diffuser, the span of described jet flow groove length is
wherein θ represents the half-angle of spread of described diffuser.
In one embodiment of the invention, the span of described jet flow groove quantity is 9 ~ 12.
In one embodiment of the invention, described jet flow groove is formed in described diffuser inwall grooving.
In view of this, the centrifugal pump pumping chamber of the suppression eddy current of second aspect present invention embodiment, comprises the centrifugal pump pumping chamber that above-mentioned any one suppresses eddy current.
The beneficial effect of the centrifugal pump of the embodiment of the present invention is: structure is simple, suppresses venturi effect remarkable.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic perspective view of the centrifugal pump pumping chamber of the suppression eddy current of the embodiment of the present invention;
Fig. 2 is the front view of the centrifugal pump pumping chamber of the suppression eddy current shown in Fig. 1;
Fig. 3 is the sectional view of the centrifugal pump pumping chamber of the suppression eddy current shown in Fig. 1;
Fig. 4 is the working principle schematic diagram of eddy current in diffuser in the centrifugal pump pumping chamber of the suppression eddy current of the embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
As depicted in figs. 1 and 2, jet flow groove structure for be along the circumferential direction evenly arranged jet flow groove 2 on pumping chamber diffuser 1 inwall, and the length direction of jet flow groove 2 is parallel to the streamline of pumping chamber diffuser 1.On the cross section perpendicular to pumping chamber diffuser 1, jet flow groove 2 shape is rectangle.It should be noted that, jet flow groove 2 is formed in the grooving of pumping chamber diffuser 1 inwall.
Alternatively, as shown in Figure 3, with pumping chamber diffuser 1 wall thickness δ for reference, the span of jet flow groove 2 degree of depth is
with pumping chamber diffuser 1 inwall girth C for reference, the span of jet flow groove 2 width is
with pumping chamber diffuser 1 along flowing to length L for reference, the span of jet flow groove 2 length is
wherein θ represents the half-angle of spread of pumping chamber diffuser 1.Because jet flow groove 2 quantity crosses processed complex at most, quantity is crossed and is suppressed venturi effect not good at least, and therefore the span of jet flow groove 2 quantity is preferably 9 ~ 12.
Pumping chamber diffuser jet flow groove structure suppresses the working principle schematic diagram of diffuser eddy current as shown in Figure 4.Jet flow groove 2 utilizes the adverse pressure gradient in pumping chamber diffuser 1 to produce microjet 5, and microjet 5 mixes with main flow 4 in pumping chamber diffuser, reduces strength of vortex in diffuser, suppresses eddy current development in diffuser, thus improves centrifugal pump operation stability; Meanwhile, microjet 5 affects very little on main flow 4 in pumping chamber diffuser, also very little on the impact of centrifugal pump operational efficiency.According to working principle, known jet flow groove 2 is applicable to the centrifugal pump of any type.Therefore the centrifugal pump pressurized water chamber structure of the suppression eddy current of the embodiment of the present invention is simple, and easily processing and manufacture, be applicable to the centrifugal pump of any type.
The present invention also proposes a kind of centrifugal pump, and this centrifugal pump comprises the centrifugal pump pumping chamber that above-mentioned any one suppresses eddy current.Based on similar structure, the beneficial effect of the centrifugal pump of the embodiment of the present invention is: structure is simple, suppresses venturi effect remarkable.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (6)
1. suppress a centrifugal pump pumping chamber for eddy current, it is characterized in that, the diffuser inwall of described centrifugal pump pumping chamber is along the circumferential direction evenly arranged jet flow groove, the length direction of described jet flow groove is parallel to the streamline of described diffuser.
2. the centrifugal pump pumping chamber of suppression eddy current according to claim 1, is characterized in that, on the cross section perpendicular to described diffuser axis, described jet flow groove shape is rectangle.
3. the centrifugal pump pumping chamber of suppression eddy current according to claim 1, is characterized in that, with described diffuser wall thickness δ for reference, the span of the described jet flow groove degree of depth is
with described diffuser inwall girth C for reference, the span of described jet flow groove width is
flow to length L for reference with described diffuser, the span of described jet flow groove length is
wherein θ represents the half-angle of spread of described diffuser.
4. the centrifugal pump pumping chamber of suppression eddy current according to claim 1, is characterized in that, the span of described jet flow groove quantity is 9 ~ 12.
5. the centrifugal pump pumping chamber of suppression eddy current according to claim 1, is characterized in that, described jet flow groove is formed in described diffuser inwall grooving.
6. a centrifugal pump, is characterized in that, comprises the centrifugal pump pumping chamber of the suppression eddy current described in any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447324.XA CN104329293B (en) | 2014-09-03 | 2014-09-03 | A kind of centrifugal pump pumping chamber suppressing eddy current and there is its centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447324.XA CN104329293B (en) | 2014-09-03 | 2014-09-03 | A kind of centrifugal pump pumping chamber suppressing eddy current and there is its centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104329293A true CN104329293A (en) | 2015-02-04 |
| CN104329293B CN104329293B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410447324.XA Active CN104329293B (en) | 2014-09-03 | 2014-09-03 | A kind of centrifugal pump pumping chamber suppressing eddy current and there is its centrifugal pump |
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| CN (1) | CN104329293B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107538A (en) * | 2019-05-27 | 2019-08-09 | 兰州理工大学 | A kind of centrifugation water-pumping chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141295A (en) * | 1996-11-01 | 1998-05-26 | Hitachi Ltd | Pump and dish washer using the pump |
| JP2003035153A (en) * | 2001-07-23 | 2003-02-07 | Fuji Heavy Ind Ltd | Turbocharger compressor housing structure |
| JP2006170112A (en) * | 2004-12-17 | 2006-06-29 | Mitsubishi Heavy Ind Ltd | Unstable flow suppression device for fluid machine |
| JP2012145064A (en) * | 2011-01-14 | 2012-08-02 | Mitsubishi Heavy Ind Ltd | Diffuser structure of fluid machine |
-
2014
- 2014-09-03 CN CN201410447324.XA patent/CN104329293B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141295A (en) * | 1996-11-01 | 1998-05-26 | Hitachi Ltd | Pump and dish washer using the pump |
| JP2003035153A (en) * | 2001-07-23 | 2003-02-07 | Fuji Heavy Ind Ltd | Turbocharger compressor housing structure |
| JP2006170112A (en) * | 2004-12-17 | 2006-06-29 | Mitsubishi Heavy Ind Ltd | Unstable flow suppression device for fluid machine |
| JP2012145064A (en) * | 2011-01-14 | 2012-08-02 | Mitsubishi Heavy Ind Ltd | Diffuser structure of fluid machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107538A (en) * | 2019-05-27 | 2019-08-09 | 兰州理工大学 | A kind of centrifugation water-pumping chamber |
| CN110107538B (en) * | 2019-05-27 | 2021-03-02 | 兰州理工大学 | Water pumping chamber of centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104329293B (en) | 2016-08-24 |
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