CN102454627A - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
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- CN102454627A CN102454627A CN2011103191967A CN201110319196A CN102454627A CN 102454627 A CN102454627 A CN 102454627A CN 2011103191967 A CN2011103191967 A CN 2011103191967A CN 201110319196 A CN201110319196 A CN 201110319196A CN 102454627 A CN102454627 A CN 102454627A
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- centrifugal pump
- impeller
- guide plate
- housing
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Abstract
The invention provides a centrifugal pump, wherein the water yield of the maximum efficiency can be arbitrarily changed and the optimal operation range of the water yield can be freely chosen through the combination of a shell and an impeller. The centrifugal pump comprises an impeller (12) connected with a rotating shaft (26) and capable of rotating, a shell (10) provided with a discharge outlet (10b); a shell cover (14) used for sealing the opening part of the shell (10); a guide plate (34) provided with a plurality of pathways (40, 42, 44, 46) used for communicating the impeller (12) with the shell (10); and a sealing member (50) used for sealing all the other pathways (42, 44, 46) on the impeller (12) side. The impeller (12) is arranged inside the shell. The guide plate (34) in the shell (10) and the impeller (12) are in a concentric circular configuration in such a way that one pathway (40) is communicated with the discharge outlet (10b).
Description
Technical field
The present invention relates to centrifugal pump, particularly a kind of low specific-speed centrifugal pump that has best efficiency point in little water yield side.
Background technique
Usually; Centrifugal pump constitutes, and with being fixed on the driving of following motor and the impeller on the running shaft that rotates is configured in the inside of housing with freely mode of rotation, and makes the impeller rotation; Thus, thus the fluid that flows into enclosure interior is boosted through the rotation of impeller makes it flow out to the outside of housing.At this; Constituting of a kind of low specific-speed centrifugal pump for example: the export department at housing is provided with restriction and through this restriction the water yield is carried out throttling; Perhaps the throttle orifice (orifice) that the water yield is carried out throttling is set, thus, can has best efficiency point in the low wash water side in the housing outlet.
Expression is designed to reach at the water yield a1 place water yield-head curve X1 and the efficiency curve Y1 of the low specific-speed centrifugal pump (specific low specific-speed centrifugal pump) of highest efficiency eta 1 among Fig. 1.In low specific-speed centrifugal pump, extremely turning round, thereby make pump more satisfactory in the mechanical aspects stabilization ratio for reducing noise and vibration etc. near the water yield of the highest efficiency eta 1 of pump.Therefore; What extensively implement is; Respectively the water yield a1 of best efficiency point for example 80% is set at minimum amount of water a1 ' (=a1 * 0.8); The water yield a1 of best efficiency point for example 110% is set to the highest water yield a1 " (=a1 * 1.1), and with this water yield scope (a1 '～a1 ") is defined as the running water yield scope A1 of pump.
Therefore; If want to use this specific low specific-speed centrifugal pump satisfy beyond the running water yield scope A1 of specific low specific-speed centrifugal pump, the for example requirement of the running at water yield a2 place shown in Figure 1, the efficiency eta 2 that then exists the specific low specific-speed centrifugal pump at this water yield a2 place significantly departs from best efficiency point and significantly reduces, produces the problem of noise and vibration etc. from highest efficiency eta 1.Therefore; Under these circumstances; What extensively implement is; Prepare in addition and low specific-speed centrifugal pump that use is different with specific low specific-speed centrifugal pump, this low specific-speed centrifugal pump has like the water yield shown in dotted lines in Figure 2-head curve X2 and efficiency curve Y2, reaches the running water yield scope A2 that peak efficiency or its water yield a2 are positioned at pump at water yield a2 place.
The claimant has proposed a kind of scheme of impeller; As employed impeller in the low specific-speed centrifugal pump that has best efficiency point in little water yield side; Between the surface of the back side of a side's who adjoins each other blade (main wing) and the opposing party's blade (main wing), be provided with and compare the separation wing (with reference to patent documentation 1) that is positioned at the inboard and extends towards the surface of the opposing party's blade with the external diameter of impeller from the back side of a side blade.In addition; A kind of scheme of impeller has also been proposed; It has auxiliary ring cylindraceous, and this auxiliary ring is entrenched on the peripheral part of the impeller bodies with first logical liquid road, and auxiliary ring is provided with the second logical liquid road (with reference to patent documentation 2) that extends to peripheral part from the interior perimembranous of this auxiliary ring.
Patent documentation 1: TOHKEMY 2007-51592 communique
Patent documentation 2: TOHKEMY 2005-23794 communique
But, if the reply client various requirements and design and produce the centrifugal pump that satisfies different performance at every turn, then risings such as design cost, fabricating cost and material cost can cause the cost increase of centrifugal pump itself.And, if such consume material also can cause the waste to Limited resources.Even the impeller of record in the patent documentation 1,2 owing to the processing of the impeller that need carry out being consistent with pump performance itself, also need be prepared a kind of impeller to the centrifugal pump with a kind of performance.Therefore, can't at random select a plurality of performances with an impeller.
Summary of the invention
The present invention In view of the foregoing makes, and its purpose is to provide a kind of centrifugal pump, and this centrifugal pump can change the water yield of peak efficiency arbitrarily, and can select the water yield scope that preferably turns round arbitrarily through the combination of a housing and an impeller.
The invention of technological scheme 1 record is a kind of centrifugal pump, it is characterized in that having: impeller, and itself and running shaft link and rotation; Housing, it has exhaust port and accommodates said impeller in inside; Case cover, its opening portion with said housing is airtight; Guide plate, it has many paths that impeller side and case side are connected, the mode that is communicated with said exhaust port with a path in said many paths, in said housing with said impeller concentric circles dispose; And packaged unit, it seals the path beyond the path that is communicated with said exhaust port of said guide plate in impeller side.
Thus; When for example on guide plate, having these two paths of first path and alternate path; The exhaust port of first path and the housing of guide plate is interconnected constitutes first centrifugal pump, the alternate path of guide plate is interconnected with the exhaust port of housing and constitutes second centrifugal pump with performance different with above-mentioned first centrifugal pump.In first centrifugal pump, through the impeller side sealing of packaged unit with alternate path; In second centrifugal pump,, thus, can prevent that sealing gets in the untapped path, and can prevent that movement disorder efficient reduces near the inlet of path through the impeller side sealing of packaged unit with first path.
The invention of technological scheme 2 record is the centrifugal pump with record in the technological scheme of following characteristic 1, it is characterized in that, said guide plate with can week upwards the mode of rotation be configured in the said housing, and be fixed on this housing or the said case cover.
Thus; A mode that is communicated with the exhaust port of housing to be arranged in many paths on the guide plate disposes guide plate; And when being fixed on this guide plate on housing or the case cover; Through making guide plate, can easily adjust the configuration of guide plate with respect to housing or case cover in upwards rotation of week.
The invention of technological scheme 3 records is the centrifugal pumps with record in the technological scheme of following characteristic 1 or 2, it is characterized in that many paths of said guide plate have mutually different sectional area.
Each path of guide plate is set as follows: when constituting centrifugal pump when this path is communicated with the exhaust port of housing, make this centrifugal pump have the pump performance of regulation respectively.
The invention of technological scheme 4 record is the centrifugal pump with each record in the technological scheme of following characteristic 1 to 3, it is characterized in that, above-mentioned packaged unit by with the impeller side of above-mentioned guide plate in the circular-arc demarcation strip that connects constitute.
Thus, under the situation that the path more than three is set on the guide plate, can the path more than two be sealed simultaneously through a demarcation strip.
The invention of technological scheme 5 records is the centrifugal pumps with record in the technological scheme of following characteristic 4; It is characterized in that said demarcation strip forms the shape that the Way out thickness towards this runner reduces with the mode that between the peripheral end face of itself and said impeller, forms the runner of volute.
Thus, fluid can flow along the runner of the volute between peripheral end face that is formed at impeller and the demarcation strip more swimmingly.
The invention of technological scheme 6 records is the centrifugal pumps with record in the technological scheme of following characteristic 4 or 5, it is characterized in that said demarcation strip and said case cover are integrally formed.
Thus, make the installation of case cover and demarcation strip become easy.
According to centrifugal pump of the present invention,, can constitute the water yield of any change peak efficiency and select the preferably centrifugal pump of running water yield scope arbitrarily through the combination of a housing and an impeller.Thus, no longer need be to the making water consumption of each client and design and produce centrifugal pump, can eliminate the waste of material etc., the cost that can seek centrifugal pump reduces, and, can eliminate waste to the earth resource of preciousness, can save the energy.
And; Adopt the little water yield of the structure of general vortex pump, high-lift centrifugal pump, the area of its exit passageway is less usually, obtains housing if hope through casting; Exist can't be in housing the situation of moulding path reliably; But centrifugal pump of the present invention is employed, be provided with the guide plate of the path of decision pump performance, because passage opening, therefore can be through casting moulding with comparalive ease.
Description of drawings
Fig. 1 is the water yield-head curve of a low specific-speed centrifugal pump of expression and the chart of efficiency curve.
Fig. 2 is with the water yield-head curve of other low specific-speed centrifugal pump and efficiency curve, with the water yield-head curve shown in Figure 1 and the chart of the common expression of efficiency curve.
Fig. 3 is the vertical profile plan view of the centrifugal pump of embodiment of the present invention.
Fig. 4 is the A-A line sectional drawing of Fig. 3.
Fig. 5 is the sectional view of path of the guide plate part, that the edge is communicated with the exhaust port of housing of expression centrifugal pump shown in Figure 3.
Fig. 6 is the figure suitable with Fig. 3 of the centrifugal pump of other mode of executions of the present invention.
Fig. 7 is the figure suitable with Fig. 4 of the centrifugal pump of another other mode of executions of the present invention.
Fig. 8 is the figure suitable with Fig. 4 of the centrifugal pump of another other mode of executions of the present invention.
The explanation of reference character
10 housings
The 10a suction port
The 10b exhaust port
12 impellers
14 case cover
20 bearing bodies
26 running shafts
30 mainboards
32 blades
34 guide plates
38 runners
40,42,44,46 paths
50,52 demarcation strips (packaged unit)
54a, 54b, 54c latch (packaged unit)
Embodiment
Below, with reference to Fig. 3 to Fig. 8 embodiment of the present invention is described.In addition, in following each example, identical or suitable parts are marked same tag and omit repeat specification.
Fig. 3 is the vertical profile plan view of the centrifugal pump of embodiment of the present invention, and Fig. 4 is the A-A line sectional drawing of Fig. 3, and Fig. 5 is the sectional view of path of the guide plate part, that the edge is communicated with the exhaust port of housing of expression centrifugal pump shown in Figure 3.
To shown in Figure 5, centrifugal pump has like Fig. 3: housing 10, and it has suction port 10a and exhaust port 10b; Impeller 12, it is housed in the inside of housing 10 with rotation mode freely; Case cover 14, its opening portion of housing 10 that will contain impeller 12 in inside is airtight.Case cover 14 is fixed on the housing 10 via bolt 16.
In this example; On the surface of discoideus mainboard (wheel disc) 30, dispose a plurality of blades 32 of straight line shape extension radially and constitute impeller 12; But the shape of impeller is not limited to this structure, can correspondingly be suitable for multiple impellers such as enclosed type, style of opening, semi-open type with purposes.On the internal surface of impeller 12 sides of housing 10, surround impeller 12 around guide plate 34 and impeller 12 concentric circles ground and with can week upwards the mode of rotation dispose, and this guide plate 34 is fixed on the case cover 14 via bolt 36.Thus, between the peripheral end face of impeller 12 and guide plate 34, be formed with continuous circle-shapedly runner 38.
On guide plate 34, the tangential direction with longshore current road 38 is extended and is connected impeller 12 sides and housing 10 sides and determine four paths of the pump performance on first path 40, alternate path 42, the 3rd path 44 and four-way road 46 in this example.These paths 40,42,44,46 are to case cover 14 side openings, and equally spaced dispose along the circumferencial direction of guide plate 34.In addition, the quantity that is arranged on the path on the guide plate is that the plural number more than 2 gets final product, and in addition, the allocation position of path also can be along the circumferencial direction unequal interval of guide plate.
The guide plate 34 of this shape, though be formed with four paths 40,42,44,46 of regulation shape of decision pump performance, because these paths 40,42,44,46 are to case cover 14 side openings, thereby can be through casting moulding with comparalive ease.
The outlet end that is connected with exhaust port 10b housing 10 each path 40,42,44,46; So that flowing fluid can flow into the mode in the exhaust port 10b of housing 10 swimmingly in each path 40,42,44,46, form the identical shape of entry end with the exhaust port 10b of housing 10.Each path 40,42,44,46 except that with passage portion the outlet end that the exhaust port 10b of housing 10 is connected, sectional area is different, can determine the mode of different pump performances to set with each of each path 40,42,44,46.
Extremely shown in Figure 5 like Fig. 3; The passage portion of first path 40 is set as follows: first path 40 is communicated with the exhaust port 10b of housing 10 and is constituting under the situation of first centrifugal pump; The water yield-the head curve of this first centrifugal pump and efficiency curve are for example with the water yield-head curve X1 shown in Figure 1 and efficiency curve Y1 is consistent and be the maximal efficiency point at water yield a1 place.
The passage portion of alternate path 42 is set as follows: thus guide plate shown in Figure 4 24 is turned clockwise 90 ° alternate path 42 is communicated with the exhaust port 10b of housing 10 and constituting under the situation of second centrifugal pump; The water yield-the head curve of this second centrifugal pump and efficiency curve are for example with the water yield-head curve X2 shown in Figure 2 and efficiency curve Y2 is consistent and be the maximal efficiency point at water yield a2 place.
The passage portion of the 3rd path 44 is set as follows: thus guide plate shown in Figure 4 24 is turned clockwise 180 ° the 3rd path 44 is communicated with the exhaust port 10b of housing 10 and constituting under the situation of the 3rd centrifugal pump; The water yield-the head curve of the 3rd centrifugal pump and efficiency curve have for example Fig. 1 and the water yield-head curve and the efficiency curve water yield-head curve and efficiency curve in addition shown in Figure 2.
Likewise; The passage portion on four-way road 46 is set as follows: thus guide plate shown in Figure 3 24 is turned clockwise 270 ° four-way road 46 is communicated with the exhaust port 10b of housing 10 and constituting under the situation of the 4th centrifugal pump; The water yield-the head curve of the 4th centrifugal pump and efficiency curve have Fig. 1 for example and the water yield-head curve shown in Figure 2 and efficiency curve and the water yield-head curve that obtains through the 3rd centrifugal pump and the water yield-head curve and the efficiency curve beyond the efficiency curve.
Therefore, constitute centrifugal pump, thus, can access four kinds of centrifugal pumps with the different water yield-head curves and performance curve thereby any exhaust port 10a with housing 10 in the path 40,42,44,46 that is arranged on the guide plate 34 is interconnected.Thus; Need not to design again centrifugal pump and make new centrifugal pump; Use a housing 10 and an impeller 12; Only through the path 40,42,44,46 of the guide plate 34 selecting arbitrarily to be communicated with, just can constitute and have the different water yield-head curves and the centrifugal pump of performance curve with the exhaust port 10b of housing 10.
In this example, on guide plate 34, be provided with four paths 40,42,44,46 of decision pump performance, therefore,, can constitute four and have the different water yield-head curves and the centrifugal pump of performance curve through the combination of a housing 10 and an impeller 12.That is to say, can constitute be arranged on guide plate 34 on the quantity of path of decision pump performance corresponding, have the different water yield-head curves and a centrifugal pump of performance curve.
At this, to shown in Figure 5, when first path 40 that is arranged on the guide plate 34 was communicated with the exhaust port 10b of housing 10, other paths 42,44,46 that are arranged on beyond first path 40 on the guide plate 34 did not use as the path of water like Fig. 3.In addition; If make impeller 12 rotations of centrifugal pump begin to pump up water in this state; Then water can get in untapped other paths 42,44,46 beyond first path 40, thereby near the inlet of path 42,44,46, movement disorder can take place, and efficient reduces (movement disorder causes damage).In order to prevent this situation; To untapped other paths 42,44,46 beyond first path of guide plate 34 on the position that impeller 12 sides are sealed; Be provided with demarcation strip 50, this demarcation strip 50 constitutes the packaged unit of these other paths 42,44,46 of sealing.
In this example, demarcation strip (packaged unit) 50 by with the inner peripheral surface of guide plate 34 in circular-arc a slice plate of connecing constitute, be arranged on integratedly on the case cover 14.Thus, for example when make guide plate shown in Figure 3 24 turn clockwise 90 °, when the alternate path 42 that is arranged on the guide plate 34 is communicated with the exhaust port 10b of housing 10, other paths 40,44,46 beyond the alternate path 42 are separated plate 40 sealings.
Further; In this example; As demarcation strip 50, form the volute of frontal width expansion on the flow direction of water in order to make the peripheral end face that is formed on impeller 12 and the runner 38 between the demarcation strip 50, this demarcation strip 50 uses towards the Way out thickness of runner 38 parts of attenuation gradually.That is, the thickness t 1 of first path, 40 side ends of the guide plate 34 of demarcation strip 50 is than the 2 thick (t1＞t2) of the thickness t of four-way road 46 side ends of guide plate 34.
According to this example; Any exhaust port 10b with housing 10 of the path 40,42,44,46 that is arranged on the guide plate 34 is interconnected and constitutes centrifugal pump; Thus, can constitute and have the water yield-head curve of having nothing in common with each other and four kinds of centrifugal pumps of performance curve.
Fig. 6 representes the centrifugal pump of other mode of executions of the present invention.This example is to the difference of example shown in Figure 5 that with Fig. 3 Fig. 3 is fixed on guide plate 34 on the case cover 14 through bolt 36, with it relatively, in this example, through bolt 36 guide plate 34 is fixed on the housing 10 to example shown in Figure 5.
That is to say that Fig. 3 is to example shown in Figure 5, be fixed on guide plate 34 on the case cover 14 through bolt 36 after, through bolt 16 housing 10 is fixed on the case cover 14.With it relatively, example shown in Figure 6 will be fixed on the case cover 14 through bolt 16 through the housing 10 of bolt 36 predetermined fixed guide plates 34.
Fig. 7 representes the centrifugal pump of another other mode of executions of the present invention.This example and Fig. 3 be to the difference of example shown in Figure 5, as packaged unit, use thickness t is certain in whole scope flat demarcation strip 52 and for example untapped other paths 42,44,46 beyond first path 40 close at impeller 12 side seals.Like this, flat demarcation strip through will thickness t is certain in whole scope 52 uses as packaged unit, can seek the simplification of structure.
Fig. 8 representes the centrifugal pump of another other mode of executions of the present invention.The difference of the example that this example and Fig. 3 are extremely shown in Figure 5 is; Replacement is as the demarcation strip 50 that is made up of a plate of packaged unit, and through latch 54a, 54b, 54c for example untapped other paths 42,44,46 beyond first path 40 seal respectively in impeller 12 sides.That is to say,, each path 42,44,46 is sealed respectively through latch (packaged unit) 54a, 54b, 54c with the inlet side end that latch (packaged unit) 54a, 54b, 54c insert path 42,44,46 respectively.
So far, an embodiment of the invention are illustrated, but the present invention is not limited to above-mentioned mode of execution, can in the scope of technological thought of the present invention, implements certainly with various mode.
Claims (6)
1. centrifugal pump is characterized in that having:
Impeller, itself and running shaft link and rotation;
Housing, it has exhaust port and accommodates said impeller in inside;
Case cover, its opening portion with said housing is airtight;
Guide plate, it has many paths that impeller side and case side are connected, the mode that said guide plate is communicated with said exhaust port with a path in said many paths, in said housing with said impeller concentric circles dispose; And
Packaged unit, it seals the path beyond the path that is communicated with said exhaust port of said guide plate in impeller side.
2. centrifugal pump according to claim 1 is characterized in that, said guide plate with can week upwards the mode of rotation be configured in the said housing, and be fixed on this housing or the said case cover.
3. centrifugal pump according to claim 1 and 2 is characterized in that, many paths of said guide plate have mutually different sectional area.
4. centrifugal pump according to claim 1 is characterized in that, said packaged unit by with the impeller side of said guide plate in the circular-arc demarcation strip that connects constitute.
5. centrifugal pump according to claim 4 is characterized in that, said demarcation strip forms the shape that the Way out thickness towards this runner reduces with the mode that between the peripheral end face of itself and said impeller, forms the runner of volute.
6. centrifugal pump according to claim 4 is characterized in that, said demarcation strip and said case cover are integrally formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010231069A JP5481346B2 (en) | 2010-10-14 | 2010-10-14 | Centrifugal pump |
| JP2010-231069 | 2010-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102454627A true CN102454627A (en) | 2012-05-16 |
| CN102454627B CN102454627B (en) | 2015-08-19 |
Family
ID=46038163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110319196.7A Active CN102454627B (en) | 2010-10-14 | 2011-10-14 | Centrifugal pump |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5481346B2 (en) |
| CN (1) | CN102454627B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5706792B2 (en) * | 2011-09-20 | 2015-04-22 | 株式会社荏原製作所 | Centrifugal pump |
| CN104675751B (en) * | 2015-01-21 | 2017-01-18 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Centrifugal pump case |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05187399A (en) * | 1992-01-13 | 1993-07-27 | Mitsubishi Heavy Ind Ltd | Flow rate variable pump |
| JP2002257084A (en) * | 2001-02-26 | 2002-09-11 | Ebara Corp | Centrifugal pump |
| JP2005023794A (en) * | 2003-06-30 | 2005-01-27 | Ebara Corp | Impeller |
| JP2007051592A (en) * | 2005-08-18 | 2007-03-01 | Ebara Corp | Impeller and pump |
-
2010
- 2010-10-14 JP JP2010231069A patent/JP5481346B2/en active Active
-
2011
- 2011-10-14 CN CN201110319196.7A patent/CN102454627B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05187399A (en) * | 1992-01-13 | 1993-07-27 | Mitsubishi Heavy Ind Ltd | Flow rate variable pump |
| JP2002257084A (en) * | 2001-02-26 | 2002-09-11 | Ebara Corp | Centrifugal pump |
| JP2005023794A (en) * | 2003-06-30 | 2005-01-27 | Ebara Corp | Impeller |
| JP2007051592A (en) * | 2005-08-18 | 2007-03-01 | Ebara Corp | Impeller and pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102454627B (en) | 2015-08-19 |
| JP5481346B2 (en) | 2014-04-23 |
| JP2012082778A (en) | 2012-04-26 |
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