CN104074800A - Centrifugal pump and volute equipped for the same - Google Patents
Centrifugal pump and volute equipped for the same Download PDFInfo
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- CN104074800A CN104074800A CN201410055855.4A CN201410055855A CN104074800A CN 104074800 A CN104074800 A CN 104074800A CN 201410055855 A CN201410055855 A CN 201410055855A CN 104074800 A CN104074800 A CN 104074800A
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- diffuser
- spiral case
- diameter
- centrifugal pump
- ring
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Abstract
The invention provides a centrifugal pump and a volume equipped for the same. When the centrifugal pump is used in a large-size hydraulic machine, easy coating and easy mending are realized in the volute without efficiency reduction. The centrifugal pump (20) is provided with the components of: a rotating shaft (11); a centrifugal impeller (8) which is mounted at the front end of the rotating shaft; a diffuser (5) which is configured at the outer diameter side of the centrifugal impeller and is provided with a plurality of blades that are separately configured in the circumferential direction; and the volute (1) which is configured at the outer diameter side of the diffuser. The volute is provided with a vortex part which makes the cross area gradually change along the circumferential direction, and two ring components (3a,3b) which are formed at an inner-diameter-side opened part of the vortex part and are configured parallelly. The diameter of the inner-diameter end of each ring component is larger than or equal with the diameter of the outer-diameter end of each blade of the diffuser.
Description
Technical field
The spiral case that the present invention relates to centrifugal pump and possess, particularly relates to the large-scale vertical centrifugal pump that ejection pressure is high pressure and the spiral case possessing thereof.
Background technique
The example of the spiral case that large-scale hydraulic machinery is in the past used is recorded in patent documentation 1 and 2, non-patent literature 1.Wherein, in the spiral case described in patent documentation 1, when water turbine turns round, consider intensity face, and seek to reduce the exhaust loss of impact and the collision loss at guide vane place of the wake flow based on fixed guide vane outlet.Specifically, hydraulic machinery there is rotatable roller, the movable guide vane of arranging across compartment of terrain towards each other along week in the outside of roller, in the outside of guide vane along the fixed guide vane of arranging across compartment of terrain towards each other in week and the spiral case that is configured in the outside of fixed guide vane.The upper and lower end of fixed guide vane is fixed on upper retaining ring and the lower retaining ring of ring-type, and the wall thickness of the end, inner circumferential side of fixed guide vane forms that to compare central part thinner with upper and lower end parts.
In addition in patent documentation 2, disclose following technology, that is, and in water turbine or turbo machine, even if the outstanding length to housing of mainboard of supporting fixed guide vane is further shortened, also can seek to maintain sufficient intensity with respect to the external force of on-stream generation.Specifically, fixed guide vane is divided into long wing fixed guide vane and short limb fixed guide vane, long wing fixed guide vane and short limb fixed guide vane are alternately fixed on to mainboard successively, be formed with the speed ring of hydraulic machinery.
In addition, in non-patent literature, record in the pump of vertical centrifugal whirlpool type spiral case and formed by welding structure on a large scale.And, for convenient, repair, although be large capacity, need be made as indoor and expose completely, housing and fixed guide vane can be decomposed by bolton.In addition, as recorded in detail in this Fig. 3, guiding device (diffuser) and housing are cut apart, the outermost path position of retaining ring arrives the entrance part of spiral case.
Technical paper formerly
Patent documentation
Patent documentation 1: TOHKEMY 2005-140078 communique
Patent documentation 2: TOHKEMY 2002-138939 communique
Non-patent literature
Non-patent literature 1: Wan Jiazhai Yin Huang project team, " towards the pumping unit of Shanxi Province, China/Wan Jia stockaded village project ", the former daily paper in river, No.195, in April, 2002, the 71st page of right hurdle
In hydraulic machinery described in any one in above-mentioned patent documentation 1,2 and non-patent literature 1, the spiral case of hydraulic machinery and the joint of diffuser, be narrow place want to overcome by operating fluid force and centrifugal force, produced, want to make this spiral case to the power of axial expansion, that is to say and be provided with fixed guide vane.Its result is known, although can prevent that spiral case is to axial expansion, the opening side of the spiral case of the root as fixed guide vane, with the joint side of diffuser, produce stress and concentrate.
For fear of this stress, concentrate, by making the sectional area of fixed guide vane increase or bight is not set as much as possible in the shape of volute section, tackle.Yet, when increasing the sectional area of fixed guide vane, when the inner peripheral surface of spiral case being carried out application or being repaired in the repairing for spiral case and maintenance, the operation difficulty that obviously becomes.Meanwhile, when the sectional area of fixed guide vane increases, the possibility of movement disorder is higher, the Efficiency Decreasing of hydraulic machinery when movement disorder.Equally, the sectional shape that maintains the efficiency of hydraulic machinery and change spiral case is also difficult.
Summary of the invention
The present invention makes in view of the unfavorable condition of above-mentioned conventional art, and its object is, does not lower efficiency and easily application, to repair spiral case inner in large-scale hydraulic machinery.In addition, its object is also, when the running of hydraulic machinery, avoids concentrating at the easy excessive stress producing of joint of housing and diffuser.
As the feature of the present invention of reaching above-mentioned purpose, centrifugal pump has: running shaft; Centrifugal impeller, it is installed on the front end of this running shaft; Diffuser, its outside diameter and edge that is configured in described centrifugal impeller circumferentially disposes a plurality of blades across compartment of terrain; And spiral case, it is configured in the outside diameter of this diffuser, described spiral case has makes sectional area along the whirlpool type portion that circumferentially gradually changes and the internal side diameter that is formed on described whirlpool type portion, open two ring elements of portion and parallel configuration, and the diameter of the inner-diameter end of described ring element is more than or equal to the diameter of external diameter end of the blade of described diffuser.
And; under this feature; in described diffuser; in the bi-side of described blade, dispose the side plate of ring-type; in two ring elements of described spiral case and the biside plate of described diffuser back side separately, be provided with described ring element and described side plate are carried out to fastening lid; can described lid, described ring element and described side plate be undertaken fastening by clamp structure; also can be by the vertical setting of described running shaft; from below, suck working fluid, at the back side of core of described impeller and the inner surface side configuration protection plate of described lid of the side.
As other features of the present invention of reaching above-mentioned purpose, a kind of spiral case, it is possessed by centrifugal pump, and can accommodate the diffuser that possesses many pieces of blades at internal side diameter, this spiral case has sectional area and along the whirlpool type portion that circumferentially gradually changes and the internal side diameter that is formed on described whirlpool type portion, opens two ring elements of portion and parallel configuration, the position of the inner-diameter end of described ring element than the position of the external diameter end of the blade of described diffuser by internal side diameter.
And, under this feature, described whirlpool type portion can be thin plate steel plate is carried out to bending after forming the member of a plurality of shell structures, the member of a plurality of shell structures that formed by this bending and described ring and described a plurality of member are welded and integrated formation each other, can also by casting make described whirlpool type portion and described ring portion integrated.
According to the present invention, in large-scale centrifugal pump, allow the on-stream expansion vertically of joint of spiral case and diffusion part, omitted the step that fixed guide vane is set at this link position, therefore in safeguarding, repairing, worker can easily enter centrifugal pump inside from becoming the joint of narrow.Thereby it is easy that application, repairing work become.Therefore in addition, owing to not having fixed guide vane at joint, when pump turn round, fluid can not collide with fixed guide vane, reduces friction yet, in can the efficiency of holding pump, can avoid excessive stress concentrated yet.
Accompanying drawing explanation
Fig. 1 is an embodiment the sectional elevation that possesses the pump of spiral case involved in the present invention.
Fig. 2 is the plan view of the volute section that has of the pump shown in Fig. 1.
Fig. 3 is that the A-A of Fig. 2 is to looking sectional view.
Description of reference numerals
1 ... spiral case, 1
ishell plates (shell structure member), 2 ... whirlpool type portion, 3a ... pressed on ring, 3b ... lower ring; 5 ... diffuser, 5a ... diffuser epipleural, 5b ... diffuser lower side panel, 5c ... blade; 6 ... clamping bolt, 7a ... upper cover, 7b ... lower cover, 8 ... impeller; 8a ... core, 8b ... side plate, 8c ... blade, 9 ... protecting sheet; 11 ... running shaft, 12 ... ejiction opening, 13 ... suction pipe, 14 ... Sealing; 15 ... bearing, 16 ... basic courses department, 20 ... vertical centrifugal pump
Embodiment
One embodiment of vertical centrifugal pump of the present invention is described with Fig. 1～Fig. 3 below.Fig. 1 is the longitudinal section of vertical centrifugal pump 20 of the present invention, and Fig. 2 is the plan view of 1 of the spiral case that has of this vertical centrifugal pump 20, and Fig. 3 is that the A-A of Fig. 2 is to looking sectional view.
In the underpart of the running shaft 11 vertically configuring, use impeller nut 8d to be fixed with impeller 8.Impeller 8 is the core 8a of both sides and the centrifugal impellers of side plate 8b that possess a plurality of blade 8c for keeping along the circumferential direction roughly equally spaced configuring.In the situation that working fluid contains sandstone in a large number, in order to prevent the inner walls by this sandstone wearing and tearing centrifugal pump 20, in the back side (being upside) of this impeller 8, be provided with the protecting sheet 9 as the part that is worn in Fig. 1.This protecting sheet 9 is used stainless steel material etc.In the downstream side of impeller 8, be that outside diameter disposes the diffuser 5 describing in detail below, at the further outside diameter of this diffuser 5, dispose cross section and be circular and sectional area along the spiral case 1 circumferentially gradually changing.
Back side (being upside in Fig. 1) at intermediate portion and the impeller 8 of running shaft 11 disposes sealing mechanism 14, and the back side for the fluid that prevents from flowing out from impeller 8 to impeller 8 flows into.Above sealing mechanism 14, dispose the gear mechanism 15 that 20 rotations of this centrifugal pump are supported freely.
In the vertical centrifugal pump 20 forming like this, the water sucking from being positioned at the suction pipe 13 of the below of impeller 8, under the effect of rotation N of impeller 8 of front end that is installed on the running shaft 11 being connected with not shown prime mover, boosts and flow into diffuser 5.Diffuser 5 has along a plurality of blade 5c that circumferentially roughly equally spaced configure and diffuser epipleural 5a and the diffuser lower side panel 5b that clips the both sides of the plurality of blade 5c.In diffuser 5, the kinergety of fluid is converted to pressure energy, working fluid is further boosted.Through the fluid between each diffuser vane 5c, flow into and be pooled to along circumferentially increasing gradually the spiral case 1 of sectional area, from ejiction opening 12, to outside, spray.
At this, the centrifugal pump 20 of the present embodiment is the centrifugal pump that the bore of for example ejiction opening 12 reaches 1000～2000mm, and H-Max also reaches 150～250m.Owing to adopting such magna pump 20, so spiral case 1 becomes tank structure processed as much as possible.But, do not get rid of casting structure.And the housing of the pump 20 that comprises spiral case 1 is supported in by support member 7b the basic courses department 16 that lower surface is formed by concrete etc.
, flow higher at lift is as mentioned above also in larger centrifugal pump 20, and the fluid force in running also increases.Consequently, particularly become the export department of the diffuser 5 of high pressure, the entrance part place of spiral case 1 produce utilize great pressure make diffuser 5 and spiral case 1 to axially, be the power of the above-below direction expansion of Fig. 1.At diffuser 5 Leaf 5c, resist the power that this wants to make diffuser 5, spiral case 1 expansion.
On the other hand, in spiral case 1, in order to resist the power of this wish expansion, fixed guide vane and diffuser vane 5c were similarly arranged on to circumferential a plurality of position in the past.Yet, when fixed guide vane is set, though can prevent that the opening portion of spiral case 1 from expanding, at the both sides of fixed guide vane face, to the assembly department generation stress of spiral case 1, concentrate.
In order to eliminate this antinomy, inventor's numerical experiment Journal of Sex Research the on-stream movement of opening portion of spiral case 1, its result obtains following opinion.That is, even if drive the centrifugal pump 20 omitted fixed guide vane, also there is no to occur to worry the axial expansion of opening portion of the spiral case 1 of degree, be only hundreds of μ m left and right in the past, and over spray diameter 1000mm in the situation that, in practicability, almost not having affects.In addition, remove the result of fixed guide vane, excessive stress can not occur at spiral case 1 place and concentrate.
Omit as described above fixed guide vane, become working fluid stream housing 1 the application of internal surface, the repairing in when maintenance, again during application, can avoid fixed guide vane to cause hindering and make the reparation construction such state of affairs of difficulty that becomes.In addition, also can avoid due to the former of fixed guide vane thereby when pump 20 turns round the collision loss, frictional loss increase of working fluid and the such state of affairs of Efficiency Decreasing.
Below explanation has the details of the related spiral case 1 of the present embodiment of above-mentioned feature.Below the spiral case 1 of explanation is made by tank method processed.Spiral case 1 is by making thin plate steel plate form the shell plates 1 of frustoconical shape by punching press etc.
ichange successively its diameter and form a plurality of, to each shell plates 1
ibetween (i=1, n), weld, thereby form whirlpool type shape.It should be noted that each shell plates 1
iin the inner circumferential side with whirlpool type, suitable part is formed with parallel notch part, and the two ends up and down of this notch part are as shown in Fig. 3 is detailed, with the peripheral end welding of pressed on ring 3a and lower ring 3b.Consequently, the sectional shape of spiral case 1 is rendered as at circular shell plates 1
itwo pieces of parallel plates of inner circumferential side flask shape of connecting up and down and extending to internal side diameter.
At the internal side diameter of this spiral case 1 chimeric diffuser 5 that has the both sides (being upper and lower end parts) that diffuser epipleural 5a and diffuser lower side panel 5b by ring-type keep the blade 5c of a plurality of wing shapes in Fig. 3 seamlessly almost.And, for diffuser 5 positioningly being remained on above-below direction on spiral case 1, upper cover 7a and lower cover 7b are linked to diffuser 5 and spiral case 1.In this link, a plurality of bolts (clamp structure) 6 are used in number important place, can bear the pressure of the working fluid producing when centrifugal pump 1 running.
At this, as shown in Figure 3, spiral case has pressed on ring 3a and the lower ring 3b extending to internal side diameter, therefore at the interior Zhou Duan from above-mentioned ring 3a, 3b, be in the interval of diffuser outlet with the distance δ of the radius flow portion between the whirlpool type stream portion down to being formed by shell structure member 2, there is not the member of obstruction stream.
Therefore, likely because of the work of centrifugal pump 20 produce in be pressed in axially to make to encircle between 3a, 3b on (being above-below direction in Fig. 3) and expand, but this extensive magnitude is hundreds of μ m at most as mentioned above, in practicality without any problem.Especially in this radius stream portion, do not exist and hinder the such obstruction of fixed guide vane of in the past using of flowing, therefore mobile collision loss and frictional loss are reduced reliably, improve the efficiency of centrifugal pump 20.In addition, stator blade is being installed on to diffuser or when ring, can get rid of that root at fixed guide vane produces excessive stresses concentrate.
In addition, by diffuser 5 and spiral case 1 are arranged separately, repairing when the application of the internal surface of the shell plates 1a of spiral case 1, maintenance, again during application, can avoid blade 5a, the fixed guide vane of diffuser 5 to become and hinder and make reparation construction difficulty or the such problem of restriction reparation construction method.That is, the pump of the present embodiment is as mentioned above because spray diameter is larger, and therefore, in above-mentioned coating operation or repairing work, if worker can enter in shell plates 1a, workability significantly improves.In the pump of the present embodiment, diffuser arranges separately, therefore can be under the state of having dismantled diffuser 5 application and repair spiral case 1 individually.In addition, the radial direction flow portion of spiral case is opened, and therefore can not counteract the operation of application, repairing.In addition, by making the shell plates 1a bulk deformation of housing 1, can disperse to bear the load that interior pressure brings, avoid stress to concentrate.
It should be noted that, in the above-described embodiments, the situation of the housing that the tank processed of take is constructed, as example describes, also can be suitable for the present invention but cast the housing of constructing.When being made as casting structure, the shape of spiral case can be made as to more regular whirlpool type shape.
Claims (6)
1. a centrifugal pump, is characterized in that,
This centrifugal pump has:
Running shaft;
Centrifugal impeller, it is installed on the front end of this running shaft;
Diffuser, its outside diameter and edge that is configured in described centrifugal impeller circumferentially disposes a plurality of blades across compartment of terrain; And
Spiral case, it is configured in the outside diameter of this diffuser,
Described spiral case has makes sectional area along the whirlpool type portion that circumferentially gradually changes and the internal side diameter that is formed on described whirlpool type portion, open two ring elements of portion and parallel configuration,
The diameter of the inner-diameter end of described ring element is more than or equal to the diameter of external diameter end of the blade of described diffuser.
2. centrifugal pump according to claim 1, is characterized in that,
In described diffuser, in the bi-side of described blade, dispose the side plate of ring-type, in two ring elements of described spiral case and the biside plate of described diffuser back side separately, be provided with described ring element and described side plate are carried out to fastening lid, described lid, described ring element and described side plate are undertaken fastening by clamp structure.
3. centrifugal pump according to claim 1 and 2, is characterized in that,
By the vertical setting of described running shaft, from below, suck working fluid, in the back side of the core of described impeller, the inner surface side of described lid of the side disposes protecting sheet.
4. a spiral case, it is possessed by centrifugal pump, and can accommodate the diffuser that possesses many pieces of blades at internal side diameter, it is characterized in that,
This spiral case has sectional area and along the whirlpool type portion that circumferentially gradually changes and the internal side diameter that is formed on described whirlpool type portion, opens two ring elements of portion and parallel configuration,
Internal side diameter is leaned on than the position of the external diameter end of the blade of described diffuser in the position of the inner-diameter end of described ring element.
5. spiral case according to claim 4, is characterized in that,
Described whirlpool type portion is thin plate steel plate is carried out to bending after forming the member of a plurality of shell structures, and the member of a plurality of shell structures that formed by this bending and described ring and described a plurality of member are welded and integrated formation each other.
6. spiral case according to claim 4, is characterized in that,
By casting make described whirlpool type portion and described ring portion integrated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-068404 | 2013-03-28 | ||
| JP2013068404A JP6055706B2 (en) | 2013-03-28 | 2013-03-28 | Centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104074800A true CN104074800A (en) | 2014-10-01 |
| CN104074800B CN104074800B (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410055855.4A Active CN104074800B (en) | 2013-03-28 | 2014-02-19 | Centrifugal pump and its spiral case possessed |
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| Country | Link |
|---|---|
| JP (1) | JP6055706B2 (en) |
| CN (1) | CN104074800B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109072941A (en) * | 2016-07-01 | 2018-12-21 | 株式会社Ihi | Centrifugal compressor |
| CN114135490A (en) * | 2021-12-20 | 2022-03-04 | 沈阳鼓风机集团核电泵业有限公司 | Centrifugal pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50147042U (en) * | 1974-05-24 | 1975-12-05 | ||
| US4056330A (en) * | 1974-10-03 | 1977-11-01 | Ateliers Des Charmilles S.A. | Method for adjusting the output of a pump provided with an adjustable spray cone with movable blades |
| JPH03260399A (en) * | 1990-03-07 | 1991-11-20 | Union Carbide Ind Gases Technol Corp | Centrifugal compressor having hybrid diffuser and swirl chamber adapted for overdiffusion of cross sectional area |
| JPH10252696A (en) * | 1997-03-17 | 1998-09-22 | Ishikawajima Harima Heavy Ind Co Ltd | Centrifugal compressor |
| CN1802319A (en) * | 2003-06-07 | 2006-07-12 | 英国氧气集团有限公司 | Combination of compressor and permanent magnet motor for sewage aeration |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW368563B (en) * | 1998-04-10 | 1999-09-01 | Ind Tech Res Inst | Sheeting pump shell structure and manufacturing method thereof |
| JP4115202B2 (en) * | 2002-08-08 | 2008-07-09 | 三菱重工業株式会社 | Pump water wheel |
| US6988870B2 (en) * | 2004-01-27 | 2006-01-24 | Weir Slurry Group, Inc. | Casing for a centrifugal pump |
-
2013
- 2013-03-28 JP JP2013068404A patent/JP6055706B2/en active Active
-
2014
- 2014-02-19 CN CN201410055855.4A patent/CN104074800B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50147042U (en) * | 1974-05-24 | 1975-12-05 | ||
| US4056330A (en) * | 1974-10-03 | 1977-11-01 | Ateliers Des Charmilles S.A. | Method for adjusting the output of a pump provided with an adjustable spray cone with movable blades |
| JPH03260399A (en) * | 1990-03-07 | 1991-11-20 | Union Carbide Ind Gases Technol Corp | Centrifugal compressor having hybrid diffuser and swirl chamber adapted for overdiffusion of cross sectional area |
| JPH10252696A (en) * | 1997-03-17 | 1998-09-22 | Ishikawajima Harima Heavy Ind Co Ltd | Centrifugal compressor |
| CN1802319A (en) * | 2003-06-07 | 2006-07-12 | 英国氧气集团有限公司 | Combination of compressor and permanent magnet motor for sewage aeration |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109072941A (en) * | 2016-07-01 | 2018-12-21 | 株式会社Ihi | Centrifugal compressor |
| CN109072941B (en) * | 2016-07-01 | 2020-08-18 | 株式会社Ihi | Centrifugal compressor |
| US11156228B2 (en) | 2016-07-01 | 2021-10-26 | Ihi Corporation | Centrifugal compressor |
| CN114135490A (en) * | 2021-12-20 | 2022-03-04 | 沈阳鼓风机集团核电泵业有限公司 | Centrifugal pump |
| CN114135490B (en) * | 2021-12-20 | 2024-01-19 | 沈阳鼓风机集团核电泵业有限公司 | Centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014190301A (en) | 2014-10-06 |
| CN104074800B (en) | 2017-07-21 |
| JP6055706B2 (en) | 2016-12-27 |
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