CN104179689A - Draw-out type vertical-shaft pump - Google Patents
Draw-out type vertical-shaft pump Download PDFInfo
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- CN104179689A CN104179689A CN201410194297.XA CN201410194297A CN104179689A CN 104179689 A CN104179689 A CN 104179689A CN 201410194297 A CN201410194297 A CN 201410194297A CN 104179689 A CN104179689 A CN 104179689A
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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
- F04D29/18—Rotors
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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
- F04D29/40—Casings; Connections of working fluid
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a draw-out type vertical-shaft pump manufactured in a canning manner, and the draw-out type vertical-shaft pump is provided with pump performance more than the same degree of the pump performance of conventional vertical-shaft pumps manufactured in a casting manner and the like. In the draw-out type vertical-shaft pump (30), a rotation shaft (1) vertically arranged and provided with an impeller (2) on the front end can be pulled out from the upper end part of an ejection elbow (9). A housing is provided with an impeller housing (3a) for accommodating the impeller, a guide blade part (5) arranged adjacent to the downstream side of the impeller housing, and a lifting pipe (7) disposed on the downstream side of the guide blade part. On the downstream side of the impeller, a hub part (3b) arranged among the guide blade part to form flow paths are provided with a plurality of first rectifying plates (4a) at intervals in the circumferential direction of the impeller housing, and a plurality of second rectifying plates (4b) are disposed in the circumferential direction of the hub part at intervals. In the process of pulling out the rotation shaft, the second rectifying plates and the impeller are pulled out together.
Description
Technical field
The present invention relates to be arranged on the vertical shaft pump in pick trough, particularly relate to and only rotate the extraction type vertical shaft pump that body can be extracted upward.
Background technique
Raising in large-scale vertical shaft pump such as pump, the sea water pump for power station in circulating water pump, seawater desalination device etc. that draught engine station uses, comparatively it is desirable to, make, except comprising the operation cost that just current cost and running efficiency relate to such as initial stage cost of erection, also to comprise the life cycle cost optimization of maintenance cost.From this viewpoint, mostly adopt the pump maintainability such as repairing, inspection excellence, so-called extraction type (extracting type) of pump inside.If use extraction type pump, can main shaft and impeller be extracted and be taken out lifting pipe being arranged under the state on mounting platform, and not to extract easy decomposition compared with type pump, inspection, also can reduce the lifting capacity at pump machine station.
Patent documentation 1 discloses the example of extraction type pump.In the pump of recording at this communique, having removed plate with respect to after the upper end of upside lifting pipe fixing, by the shell of sense of rotation converter is mentioned to leave mounting platform upward, shaft housing and wing housing, the inner housing with over body case are extracted from the upper end open of upside lifting pipe.Now, main shaft is also pulled out from upper end open together with inner housing with the guide vane that is fixed in wing housing with the impeller that is fixed in its lower end simultaneously.In addition, below, this pump is called to housing extraction type.
Patent documentation 2 records other example of extraction type pump.In the pump of recording at this communique, the maximum outside diameter that makes pump impeller is slightly larger than the minimum diameter of guiding wing, and in meridian plane shape, the blade of impeller and the blade of guiding wing are stacked on radial direction.And, by the impeller of pump when extracting above lifting pipe, by the running shaft that impeller is installed is rotated a little, pull out the blade of impeller from the blade of guide vane.Below, this pump is called to rotor extraction type.
Patent documentation 1: TOHKEMY 2008-128188 communique
Patent documentation 2: Japanese Patent Publication 62-14720 communique
In addition, in large-scale pump, in order to make the reduction of shortening and fabricating cost in time limit, use the pump of tank inhibition and generation more.Compared with the pump of tank inhibition and generation pump and foundry goods system, the degrees of freedom of shape is little, need to avoid complicated blade shape etc.Therefore, compare with guide vane with impeller in the past, often become simple shape, be likely easy to just cause the reduction of performance.
In addition, make pump become extraction type if seek the raising of maintainability, pump is increased to new restriction.For example, in the pump of recording at the patent documentation 1 of the pump as housing extraction type, non-extraction type pump and the stream shape of impeller, guide vane are remained identical and guarantee the fluid property of pump., make due to guide vane housing section is formed as to 2 reconstruct, and the internal diameter of the lifting pipe of therefore having to make the downstream that is positioned at guide vane housing section is greater than the external diameter of guide vane housing section, thus when worker and cost likely increase.Particularly, in the situation that pumping up water pipe range, compared with non-extraction type pump, it is remarkable that this impact becomes.
In order to solve the problem of housing extraction type pump, in the pump of recording at patent documentation 2, by only extracting impeller and rotary shaft out, increase and the man-hour of suppressing cost increase.; in the pump of recording at this communique; although the maximum diameter of guide vane housing section is larger than non-extraction type pump, the internal diameter that is positioned at the lifting pipe in the downstream side of guide vane housing section needs only than the impeller outer diameter much smaller than guide vane external diameter slightly greatly, so can suppress the increase of manufacture cost.
In addition, in this pump, in order to solve the elongated problem of the distance from impeller to guide vane entrance compared with non-extraction type pump, the front edge side of the blade of guide vane is extended to impeller side.In addition because this pump be not tank processed pump processed but by foundry goods manufacture housing, so can adopt so complicated autofrettage., in the pump of above-mentioned tank inhibition and generation, because generally the inside and outside wall of housing is formed as by roller shaping etc. cylindricly or coniform, by circular cone or cylinder instrument, guide vane is carried out to drawing, so such processing is difficult.
Summary of the invention
The present invention proposes in view of the problem of above-mentioned conventional art, its object is, in the extraction type vertical shaft pump of tank inhibition and generation, have and the pump performance more than the pump performance equal extent of type vertical shaft pump in the past such as foundry goods system, and make manufacture cost and make man-hour and reduce.In addition, except this object, its object is also, reduces the power while extraction out and maintainability is improved.
The present invention who realizes above-mentioned purpose is the rotor extraction type vertical shaft pump that the running shaft of erectting configuration and impeller is installed at front end can be extracted from the upper end portion of the ejection elbow that is connected with housing, it is characterized in that, above-mentioned housing has: impeller housing, accommodate above-mentioned impeller; Guide vane parts, are adjacent to arrange with the downstream side of above-mentioned impeller housing; And lifting pipe, be configured in the downstream side of above-mentioned guide vane parts, in the downstream side of above-mentioned impeller, be provided with and above-mentioned guide vane parts between form the hub portion of stream, in above-mentioned impeller housing, configure multiple the 1st current plates being upwards separated with compartment of terrain week, configure multiple the 2nd current plates in above-mentioned hub portion being upwards separated with compartment of terrain week, in the time extracting above-mentioned running shaft, above-mentioned the 2nd current plate can be extracted together with above-mentioned impeller.
And, in this feature, also can be, above-mentioned the 1st current plate and above-mentioned the 2nd current plate are the shapes that the blade of 1 sheet metal is split to form, on radial direction, be separated with small configuration with gap, also can be that above-mentioned the 1st current plate compared with stream height, is highly enough low rib shape with above-mentioned the 2nd current plate.
In addition, preferably, the outlet flowing angle of above-mentioned the 1st inlet angle of current plate and the tip side of above-mentioned impeller equates, the inlet angle of above-mentioned the 1st exit angle of current plate and the tip side of above-mentioned guide vane equates, and the design point flowing angle of above-mentioned the 2nd inlet angle of current plate and the hub side of above-mentioned impeller equates, the inlet angle of above-mentioned the 2nd exit angle of current plate and the hub side of above-mentioned guide vane equates for good.
In addition, in above-mentioned feature, also can be, above-mentioned the 1st current plate and above-mentioned the 2nd current plate are the shapes that the blade of 1 sheet metal is split to form, on radial direction, be separated with small configuration with gap, also can be that above-mentioned the 1st current plate compared with stream height, is highly enough low rib shape with above-mentioned the 2nd current plate.In addition, can be also, the housing of said pump housing and above-mentioned guide vane parts be all tank system structures, and multiple above-mentioned the 1st current plates are welded in said pump housing, and multiple above-mentioned the 2nd current plates are welded in above-mentioned wheel hub member.
The present invention who realizes above-mentioned purpose possesses rotating member and static component, and above-mentioned rotating member can be sling or hung from the opening of being located at the upper end portion that sprays elbow, make above-mentioned rotating member can plug in axial direction of erectting configuration the rotor extraction type vertical shaft pump chimeric with above-mentioned static component, this rotating member has the impeller of erectting the running shaft configuring and being arranged on the front end of this running shaft, this static component has the water middle (center) bearing that rotation is supported freely above-mentioned running shaft and is configured in the axial intermediate portion of this running shaft, the protective tube that supplies above-mentioned running shaft to insert and to protect, upstream side is to accommodate the ejection bowl portion that the impeller housing of above-mentioned impeller and downstream side are the pilot flow circuit units that lead of the current to flowing out from above-mentioned impeller, be connected in the horn mouth of the upstream side of above-mentioned ejection bowl portion, be connected in the lifting pipe in the downstream side of ejection bowl portion, with the above-mentioned ejection elbow in downstream side that is connected in this lifting pipe, it is characterized in that, above-mentioned static component has the hub portion that is configured in the downstream side of above-mentioned impeller and the position adjacent with this impeller, above-mentioned pilot flow circuit unit has: the impeller housing that forms along with going downstream sectional area and become large expansion stream together with above-mentioned hub portion, multiple the 1st current plates that are upwards being separated with compartment of terrain week and arrange in this impeller housing, and multiple the 2nd current plates that are upwards being separated with compartment of terrain week and arrange in above-mentioned hub portion.And, comparatively it is desirable to, above-mentioned hub portion can be extracted together with above-mentioned rotating member.
According to the present invention, in the extraction type vertical shaft pump of impeller with oblique flow shape, because be provided with the current plate of the multiple cantilevers that are fixed in case side and be fixed in the current plate of multiple cantilevers of rotor-side in the stream portion being formed between impeller and guide vane, so in tank inhibition and generation pump in, can have and the pump performance more than the pump performance equal extent of type vertical shaft pump in the past such as foundry goods system, and make manufacture cost and make man-hour and reduce.In addition, because be rotor extraction type, so can reduce the power while extraction out, maintainability improves.
Brief description of the drawings
Fig. 1 is an embodiment's of extraction type pump of the present invention meridian plane sectional view.
Fig. 2 is near the meridian plane sectional view of the impeller of the extraction type pump shown in Fig. 1 and the enlarged view of guide vane portion.
Fig. 3 is near the circumferentially deploying sectional view of the impeller hinder marginal part of the extraction type pump shown in Fig. 1 and the enlarged view of rectification board.
Fig. 4 is the mobile explanatory drawing in the impeller downstream of diagonal pumps.
Fig. 5 is other embodiment's the meridian plane sectional view of main portion of extraction type pump of the present invention.
Fig. 6 is the figure that has represented to extract out the state of the extraction type pump shown in Fig. 5.
The explanation of reference character
1 ... running shaft, 1a, 1b ... joint, 1d ... screw section, 1x ... key, 2 ... impeller, 2a ... wheel hub, 2b ... top, 2c ... leading edge, 2d ... trailing edge, 2v ... blade, 3 ... enlarged tube portion, 3a ... impeller housing (enlarged tube), 3b ... hub portion, 3c, 3d ... flange, 4 ... rectification board, 4a ... (1st) current plate, 4b ... (2nd) current plate, 4c ... (1st) current plate, 4d ... (2nd) current plate, 4a2 ... trailing edge, 4b1 ... leading edge, 4p ... pressure side, 5 ... guide vane portion, 5a ... frame, 5b ... guide vane, 5c ... inner circle wall, 5d, 5e ... flange, 5f ... pillar part, 5g ... upstream extremity, 5h ... downstream, 5p ... pressure side, 5r ... inboard cylinder, 5s ... cliff portion, 5t ... inner side is compared with lower curtate, 5u ... embedding part, 6 ... contracted flow pipe portion, 6a ... periphery wall, 6b ... inner circle wall, 6c ... flange, 7 ... lifting pipe, 8 ... protective tube, 9 ... ejection elbow, 9a ... straight pipe portion, 9b ... branching portion, 9c, 9d, 9e ... flange, 9f ... ejiction opening, 10 ... horn mouth, 10a ... suction port, 10b ... flange, 11 ... deflection plate, 11a ... carrying cylinder, 12 ... impeller nut, 15 ... (impeller) bearing, 16a ... lower bearing, 16a1 ... pillar, 16b ... upper bearing (metal), 16b1 ... pillar, 18 ... housing, 19 ... ejection bowl portion, 20 ... setting table, 20a ... fixture structural unit, 21 ... flange, 23 ... lid, 24 ... shaft coupling portion, 30 ... extraction type vertical shaft pump, 32 ... pick trough, Da ... the path of the 1st current plate, Db ... the maximum diameter of the 2nd current plate, Dd ... ejiction opening diameter, D2 ... the maximum diameter of impeller, D4 ... the diameter of the split position of current plate, D5 ... embedding part diameter, F ... current in the impeller portion of low flow volume region, Fm ... main flow, P ... pitch, Ru ... the adverse current of the impeller eye of low flow volume region, Rd ... the adverse current of the impeller outlet of low flow volume region, X ... the gap of impeller outlet portion and guide vane entrance part, Z ... circumferential distance, β 4b1 ... current plate entrance flow angle, β 4a2 ... current plate outlet flow angle.
Embodiment
Below, use several embodiments of the vertical shaft pump of brief description of the drawings rotor extraction of the present invention type.Fig. 1 is an embodiment's of the vertical shaft pump 30 of rotor extraction type longitudinal section, and Fig. 1 is illustrated in the state that is provided with this vertical shaft pump 30 in pick trough 32.
In vertical shaft pump 30, vertical the underpart of the running shaft 1 that extends, by key 1x, the impeller 2 of oblique flow type is linked by impeller nut 12.Impeller 2 be do not have cover open impeller, multiple blade 2v in week upwards to be roughly uniformly-spaced installed on wheel hub 2a.Running shaft 1 is connected by the joint 1a, the 1b that are located at axial multiple positions, becomes the corresponding length of the degree of depth with pick trough 32.
In the upper end portion of running shaft 1, be provided with shaft coupling portion 24 in order to be connected with the not shown motor that drives this vertical shaft pump 30.In multiple positions of the axial intermediate portion of running shaft 1, be provided with rotation and support freely the bearing of this running shaft 1 (water middle (center) bearing) 16a, 16b.Be positioned at than running shaft 1 and joint 1a, the 1b of the position of the top side of bearing 16a of bottom, except bearing 16b portion, protected by protective tube 8.
In the housing 18 that running shaft 1 and impeller 2 are housed in vertical and extend.Housing 18 has: have the trumpet-shaped horn mouth 10 that sucks the suction port 10a of water from pick trough 32; The impeller housing 3a of the expansion tubulose being connected by flange 10b, 3c on the top of horn mouth 10; The columnar frame 5a being connected by flange 3d, 5d on the top of impeller housing 3a; The lifting pipe cylindraceous 7 being connected with the top of frame 5a; And the ejection elbow 9 being connected with the top of lifting pipe 7.
Ejection elbow 9 has straight pipe portion 9a cylindraceous and is formed on the sidepiece of this straight pipe portion 9a and has the branching portion 9b of ejiction opening 9f.At the branching portion 9b of ejection elbow 9, be connected with not shown ejection pipe arrangement, the use such as water supply and sewage.For the current direction ejiction opening 9f in lifting pipe 7 interior risings is guided smoothly, be provided with in the inside of ejection elbow 9 deflection plate 11 being formed by the plane of curved surface or bending.
At upper end portion and the axial intermediate portion of ejection elbow 9, flange 9c, 9d are installed, at the flange 9c of upper end portion, be provided with and cover 23 with screw bolt and nut.Central part at lid 23 is formed with opening, and running shaft 1 can run through.On lid 23, be fixed with shaft coupling portion 24.
Axially the flange 9d of intermediate portion is for being fixed on setting table 20 by ejection elbow 9.Because setting table 20 is concrete systems, so the bight in the hole of running through at vertical shaft pump 30, in order to strengthen, is provided with the fixture structural unit 20a of steel.For this fixture structural unit 20a and the location of the flange 9d of ejection elbow 9 are become easily, via flange 21, link flange 9d and fixture structural unit 20a.
In order to keep bearing 16a, the 16b of the axial intermediate portion of being located at running shaft 1, at the outer circumferential side of each bearing 16a, 16b, be separated with compartment of terrain and dispose many pillar 16a1,16b1.The outside diameter of pillar 16a1,16b1 and the engaging portion engaging of inner peripheral surface that is formed at lifting pipe 7 and ejection elbow 9.Pillar 16a1,16b1 with protective tube 8 along with hub portion 3b described later is drawn out of together with running shaft 1 with inner circle wall 6b.
Then, the ejection bowl portion 19 being made up of impeller housing 3a and guide vane portion 5, contracted flow pipe portion 6 is described in detail.Ejection bowl portion 19 forms static component, in the time extracting impeller 2 and running shaft 1 out, is retained in pick trough 32 sides.Ejection bowl portion 19 is surrounded by the frame 5a of impeller housing 3a, guide vane portion 5 and the periphery wall 6a of contracted flow pipe portion 6.
Guide vane portion 5 is formed as frame 5a and this 2 bicircular tubular of inboard cylinder 5r, and in 2 heavy cylindrical part, multiple guide vane 5b are configured being upwards separated with compartment of terrain week.In the position by internal side diameter than inboard cylinder 5r, be concentric shape with frame 5a and dispose inner circle wall 5c.In the inner circumferential side of contracted flow pipe portion 6, in order to be connected and to form contracted flow with inner circle wall 5c, be formed with the tilt angle inner circle wall 6b larger than periphery wall 6a.
In the axial direction, near the link position of impeller housing 3a and guide vane portion 5 and inner circumferential side, dispose the bearing 15 of swivel bearing running shaft 1.In addition, there is the pillar part 5f that keeps bearing 15, the current that flow out are directed to smoothly to the hub portion 3b of guide vane portion 5 from impeller 1, be configured near the downstream side and impeller 2 of impeller 2.The outer circumferential face of hub portion 3b is formed as smoothly the face being connected with the surface of the wheel hub 2a of impeller 2.
At hub portion 3b and impeller housing 3a, be provided with current plate 4a, 4b, this current plate 4a, 4b carry out rectification to the current that flow out from impeller 2, and to stream guiding between the 2 bicircular cylinders that are formed between frame 5a and the inboard cylinder 5r of the guide vane portion 5 that is configured in downstream side.The blade number of current plate 4a, 4b is integral multiple or integer/mono-of the number of guide vane 5b.The details of current plate 4b, 4a describe with Fig. 3～Fig. 6.
Fig. 2 is the longitudinal section (Fig. 2 (a)) with an embodiment's of current plate 4a of the present invention, 4b ejection bowl portion 19 and the enlarged view (Fig. 2 (b)) of guide vane portion 5, Fig. 3 is the A-A line unfolded drawing (Fig. 3 (a)) of Fig. 2 (a) and the enlarged view (Fig. 3 (b)) of rectification board 4, and Fig. 4 is the mobile figure that impeller 2 is interior and impeller 2 exports that the vertical shaft pump 30 without current plate is described.Fig. 5 and Fig. 6 are other embodiment's the longitudinal sections of extraction type pump with current plate of the present invention, and Fig. 5 is the figure that represents to spray bowl portion 19, and Fig. 6 is the figure that represents to extract from feed water tank 32 state of (extraction) vertical shaft pump 30.
Multiple current plate 4a, 4b as shown in its section configuration, are the shapes that the plate that 1 flat board is carried out to the curve form that Bending Processing forms is divided into two in Fig. 3 (a).And distolateral being welded in by tank processed of a side current plate 4a processed the impeller housing 3a forming.A distolateral hub portion 3b that is welded in of the opposing party's current plate 4b.Now, the mutual position of current plate 4a, 4b is positioned to be seemed 1 rectification board 4.Thus, the current that flow out from impeller 2 can be directed to the stream being formed between guide vane 5b, 5b smoothly.
Pay close attention to rectification board 4, the current in the ejection bowl portion 19 that below explanation forms as shown in Figure 4.In the vertical shaft pump 30 with impeller 2, kinergety is given by impeller 2, but kinergety also can be given by the form of convolution composition.Therefore, in the outlet of impeller 2, become convolution composition strong at acclivitous current of week, keep large convolution composition and arrive guide vane 5b.Guide vane 5b make blade angle become the direction parallel with running shaft 1 seek pressure recover, make at the current that become the composition that do not circle round as the downstream 5h of its export department.
In addition, if the flow of vertical shaft pump 30 is design point flows, the current that flow out from impeller 2 flow into guide vane 5b smootherly.But, in the situation of the operation point that is not design point flow, particularly low flow volume region, as shown in Figure 4, by making to flow into the current of impeller 2 centrifugal force producing that circles round, form the current F going towards radial direction outside from wheel hub 2a side.Meanwhile, near the top 2b side entrance of impeller 2, produces from the interior adverse current Ru going towards leading edge 2c side of impeller 2.
In addition, flowed into the current of impeller 2 because near the top 2b side of the centrifugal force interior deflection outlet of impeller 2 flows, if but bias current is remarkable, also can produce adverse current Rd in the wheel hub 2a side of the trailing edge 2d of blade 2v side.In addition, because the adverse current producing at the entrance part of guide vane 5b also flows into impeller 2 sides, so from the export department of impeller 2 until the entrance part of guide vane 5b forms complicated pattern of flow.Its result, because the ingress at guide vane 5b produces convolution stall etc., becomes the main cause that produces the unstable characteristic that peak value is large in performance curve.
In addition, when reducing the manufacture cost of rotor extraction type vertical shaft pump 30 and worker, if Structural application processed tank, in ejection bowl portion 19, cannot be suitable for to complicated shape compared with foundry goods structure, the interval X of the entrance part of the export department of impeller 2 and guide vane 5b easily increases.Therefore, if do not limit the current that flow out from impeller 2, free vortex flow etc. can be overlapped in the current that flow out from impeller 2, and it is complicated that current become, and the performance of vertical shaft pump 30 likely reduces.
Therefore, in the present embodiment, the limiting part of the current that flow out from impeller 2 as restriction, arranges above-mentioned current plate 4a, 4b, makes forcibly the current that flow out from impeller along current plate 4a, 4b.,, by having adopted the rotor extraction type vertical shaft pump 30 of tank system structure, although the distance X of the outlet of impeller 2 and guide vane portion 5 increases, the bias current F in the impeller of low flow volume region 2 is led smoothly to guide vane 5b.The position of this impeller housing 3a swimming on the lower by the ratio impeller 2 in enlarged tube portion 3 arranges current plate 4a, at hub portion 3b, current plate 4b is set and realizes.
And, as shown in Figure 2,3, because 2 current plate 4a, 4b are formed as by the structure cut apart of the little diameter D4 of embedding part diameter D5 when extracting out, so in the time extracting the rotating member side being made up of running shaft 1 and impeller 2,2 current plate 4a, 4b can not produce interference.That is, make the maximum dimension D 2 of impeller 2 slightly less than embedding part diameter D5, be formed as D2 < D5.In addition, because be fixed on the minimum diameter D4 of the current plate 4a on impeller housing 3a and be positioned at the split position of current plate 4a, 4b, thus larger than the maximum dimension D of impeller 22, be D4 > D2.
In the time of assembling, under hanging, formed by running shaft 1 and impeller 2 rotating member side time, as shown in Fig. 2 (b) is detailed, the inner side that is formed at inboard cylinder 5r of the inner circle wall 5c of the guide vane portion 5 of rotating member side and the guide vane portion 5 of static component side is chimeric compared with lower curtate 5t, is rotated the location of the vertical of member side.Now, be formed at the embedding part 5u of bottom of inner circle wall 5c and inboard cylinder 5r, inner circle wall 5c declines inner side as guide portion smoothly compared with lower curtate 5t.In addition, the blade 2v of impeller 2 does not also produce interferingly and declines with inboard cylinder 5r.In the time extracting out, the contrary operation of operation while carrying out with this assembling.Here, the space being formed between inboard cylinder 5r and inner circle wall 5c is the 5s of cliff portion, in order to reduce the weight and forming in order to shorten the processing length of embedding part of slinging of rotating member side.
In addition, larger because the rectification degree of the outlet current of rectification board 4 is affected by the circumferential relative position relation of current plate 4a, 4b and guide vane 5b, so need to upwards suitably configure current plate 4a, 4b in week with respect to guide vane 5b.As shown in Fig. 3 (a), because comprise strong convolution speed composition the current that flow out from the outlet of impeller 2, so at rectification board 4, main flow Fm is to the pressure side 4p side displacement of current plate 4a, 4b.
Here, determined by the shape that sprays bowl portion 19 to the path direction length of downstream 4a2 due to the upstream extremity 4b1 from current plate 4a, 4b and restricted, flow into the stream between guide vane 5b, 5b so main flow Fm has to remain convolution speed composition.Therefore,, as shown in Fig. 3 (a), the position configuration of current plate 4a, 4b is leaned on to the pressure side 5p side of guide vane 5b and the position apart from Z (Z < 0.5P) at the central part than between the pitch P of guide vane 5b.Thus, make according to the mobile maximum effect of eliminating convolution based on current plate 4a, 4b.But, 1 o'clock of only limiting to the blade number of current plate 4a, 4b and the blade number of guide vane 5b is identical or the integer of the blade number of guide vane 5b divides of this relation.
In the present embodiment, the number that makes current plate 4a, 4b be the integral multiple of number of guide vane 5b or integer divide 1, this is in order to make current plate 4a, 4b be positioned at a side that approaches pressure side 5p than the suction surface of each guide vane 5b.In addition, only formed by the gap of assembly error degree by the gap between a pair of current plate 4a, 4b, the current that flow out can be directed to guide vane portion 5 smoothly from impeller 2.In addition, the inlet angle β 4b1 of leading edge 4b1 of current plate 4a, 4b and the outlet side design point flow angle of the top 2b of diagonal impeller 2 are equated, the exit angle β 4a2 of trailing edge 4a2 and the inlet side design point flow angle of the top 2b of guide vane 5b are equated.
In addition, the hub portion 3b of the enlarged tube 3 by the downstream at impeller 2 arranges current plate 4b, suppresses in the same manner the counter-current flow of the hub side of impeller 2 export departments of low flow volume region, can be to the guide vane 5b current that lead smoothly.In addition, the maximum dimension D b of this current plate 4b, than embedding part diameter D5 slightly little (Db < D5), does not produce interference in the time extracting rotation side member.
In the above-described embodiments, current plate 4a, 4b are arranged impeller housing 3a and hub portion 3b both sides, but also can only be located at the impeller housing 3a that the adverse current of low flow volume region the most easily flows out.Consider in this case rotor extraction, certainly make the height and position (radial direction position) of current plate 4a become than impeller 2 by radial direction outside.
In addition, only, in the situation that impeller housing 3a side arranges current plate 4a, if be formed as the current plate 4a of the so-called rib shape of equal height except the outlet side (the upstream extremity 4a1 side of current plate 4a) of impeller 2, rectification effect is high.In this case, comparatively desirable is also 1/2 of the height of the current plate 4a stream height that is no more than the part of configuration current plate 4a.This be because, if making the height of current plate 4a is the more than 1/2 of stream height, the operation point beyond design point, become excessive and loss increases with respect to the angle of attack of current plate 4a (the inflow angle of the angle of current plate 4a and the current that flow out from impeller 2 poor), the effect that the pump performance based on rectified action improves offsets.
In addition, in the above-described embodiments, between paired current plate 4a, 4b, form small gap, but the groove that the end that also can form in the end of a side current plate the current plate that supplies the opposing party can be chimeric, under in the time extracting out and while assembling, the twisted member of changing one's position is sling, is hung on one side on one side, the end of chimeric two current plate 4a, 4b thus.In this case, current plate 4a, the 4b of cantilever support shape can be changed into 2 supportings, can make the stress that acts on current plate 4a, 4b reduce.
In Fig. 5 and Fig. 6, represent other embodiment of current plate.Current plate 4c, the 4d that the present embodiment is recorded and above-mentioned current plate 4a, 4b difference are only to be provided with current plate 4c, 4d in the scope of a part for flow path width.The degree of crook that is for example suitable for the path direction of current plate 4a, 4b becomes the large and installation exercise of current plate 4a, 4b and becomes at need etc.
Make the minimum diameter Da of current plate 4c larger than the external diameter D2 of impeller 2, make the maximum diameter of current plate 4d less than the outer diameter D of embedding part 5u 5.Meanwhile, making the height of current plate 4c, 4d is below 1/2 of flow path width that the position of this current plate 4c, 4d is installed.
The inlet angle of current plate 4c equates with the outlet design point flow angle of the tip side of impeller 2, and the exit angle of current plate 4c equates with the entry design point flow angle of the tip side of guide vane 5b.In addition, the inlet angle of current plate 4d equates with the outlet design point flow angle of the hub side of impeller 2, and the exit angle of current plate 4d equates with the entry design point flow angle of the hub side of guide vane 5b.
In this case, as shown in Figure 4, the shape of current plate 4c, 4d is mated with the current in partial discharge region, and bias current F is guided by current plate 4c.In addition, with respect to by the counter-current flow shown in Rd, current plate 4d guides.
In addition, as shown in Figure 6, when extraction, unload in advance each part and lid 23, the deflection plate 11 etc. of the shaft coupling portion 24 of the top front end of being located at running shaft 1.Thus, in bowl portion, impeller 2 can be moved upward in the inside of lifting pipe 7 with running shaft 1 by the part of internal side diameter with the inner circle wall 5c than guide vane portion 5 together with protective tube 8.
According to the present embodiment, because the area of current plate 4c, 4d reduces compared with above-described embodiment, so can reduce the frictional loss being produced by current plate.For current plate 4c and current plate 4d, both sides both can be set, also can only use either party.In addition, generally in the processing of current plate 4c, 4d use welding, but in the case of the stream short transverse height of current plate 4c, 4d is low, also can carry out the machining based on cutting etc., in this case, can reduce the man-hour that machining needs.
According to the various embodiments described above, in extraction type vertical shaft pump, because expand between impeller and guide vane and dispose current plate in stream, even so make, in the situation of vertical shaft pump with the flow running lower than design point flow, also can be directed at smoothly the bias current producing in impeller to guide vane.In addition also can suppress, the adverse current of impeller outlet.Thus, even adopted the extraction type vertical shaft pump of tank system structure, also can avoid becoming because of the gap of impeller outlet portion and guide vane entrance part the unstable characteristic producing greatly.
In addition,, according to the various embodiments described above, the vertical shaft pump part of extraction is taking rotor as main part and comprises hardly guide vane portion, so can reduce weight and the diameter of the part of extraction.Thereby for example can reducing slings uses lifting capacity, the repairing of vertical shaft pump, operation while checking become easily, and can reduce power.
Claims (9)
1. an extraction type vertical shaft pump, is the rotor extraction type vertical shaft pump that the running shaft of erectting configuration and impeller is installed at front end can be extracted from the upper end portion of the ejection elbow that is connected with housing, it is characterized in that,
Above-mentioned housing has:
Impeller housing, accommodates above-mentioned impeller;
Guide vane parts, are adjacent to arrange with the downstream side of above-mentioned impeller housing; And
Lifting pipe, is configured in the downstream side of above-mentioned guide vane parts,
In the downstream side of above-mentioned impeller, be provided with and above-mentioned guide vane parts between form the hub portion of stream,
In above-mentioned impeller housing, configure multiple the 1st current plates being upwards separated with compartment of terrain week, configure multiple the 2nd current plates in above-mentioned hub portion being upwards separated with compartment of terrain week, in the time extracting above-mentioned running shaft, above-mentioned the 2nd current plate can be extracted together with above-mentioned impeller.
2. extraction type vertical shaft pump according to claim 1, is characterized in that,
Multiple guide vanes that above-mentioned guide vane parts have cylinder type shell and are upwards being separated with compartment of terrain week and are configured in this cylinder type shell, above-mentioned impeller housing is that sectional area becomes large enlarged tube along with going downstream, than the maximum diameter position of above-mentioned impeller in the outer part, the external diameter maximum position of above-mentioned the 2nd current plate than the internal diameter minimum position of above-mentioned the 1st current plate in the inner part for the internal diameter minimum position of above-mentioned the 1st current plate.
3. extraction type vertical shaft pump according to claim 1 and 2, is characterized in that,
Above-mentioned the 1st current plate and above-mentioned the 2nd current plate are the shapes that the blade of 1 sheet metal is split to form, and are separated with small being configured with gap on radial direction.
4. extraction type vertical shaft pump according to claim 1 and 2, is characterized in that,
Above-mentioned the 1st current plate is highly enough low rib shape with above-mentioned the 2nd current plate compared with stream height.
5. extraction type vertical shaft pump according to claim 2, is characterized in that,
The outlet flowing angle of above-mentioned the 1st inlet angle of current plate and the tip side of above-mentioned impeller equates, the inlet angle of above-mentioned the 1st exit angle of current plate and the tip side of above-mentioned guide vane equates.
6. extraction type vertical shaft pump according to claim 2, is characterized in that,
The design point flowing angle of above-mentioned the 2nd inlet angle of current plate and the hub side of above-mentioned impeller equates, the inlet angle of above-mentioned the 2nd exit angle of current plate and the hub side of above-mentioned guide vane equates.
7. extraction type vertical shaft pump according to claim 1 and 2, is characterized in that,
The housing of said pump housing and above-mentioned guide vane parts is all tank system structures, and multiple above-mentioned the 1st current plates are welded in said pump housing, and multiple above-mentioned the 2nd current plates are welded in above-mentioned wheel hub member.
8. an extraction type vertical shaft pump, to possess rotating member and static component, and above-mentioned rotating member can be sling or hung from the opening of being located at the upper end portion that sprays elbow, make above-mentioned rotating member can plug in axial direction of erectting configuration the rotor extraction type vertical shaft pump chimeric with above-mentioned static component, this rotating member has the impeller of erectting the running shaft configuring and being arranged on the front end of this running shaft; This static component have rotation support freely above-mentioned running shaft and be configured in the water middle (center) bearing of the axial intermediate portion of this running shaft, for above-mentioned running shaft insert and protective tube, the upstream side protected be accommodate ejection bowl portion that the impeller housing of above-mentioned impeller and downstream side are the pilot flow circuit units that lead of the current to flowing out from above-mentioned impeller, be connected in the upstream side of above-mentioned ejection bowl portion horn mouth, be connected in ejection bowl portion downstream side lifting pipe and be connected in the above-mentioned ejection elbow in the downstream side of this lifting pipe; it is characterized in that
Above-mentioned static component has the hub portion that is configured in the downstream side of above-mentioned impeller and the position adjacent with this impeller, and above-mentioned pilot flow circuit unit has: the impeller housing that forms along with going downstream sectional area and become large expansion stream together with above-mentioned hub portion; Multiple the 1st current plates that are upwards being separated with compartment of terrain week and arrange in this impeller housing; And multiple the 2nd current plates that are upwards being separated with compartment of terrain week and arrange in above-mentioned hub portion.
9. extraction type vertical shaft pump according to claim 8, is characterized in that,
Above-mentioned hub portion can be extracted together with above-mentioned rotating member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013106275A JP6121239B2 (en) | 2013-05-20 | 2013-05-20 | Pull-out vertical shaft pump |
| JP2013-106275 | 2013-05-20 |
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| Publication Number | Publication Date |
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| CN104179689A true CN104179689A (en) | 2014-12-03 |
| CN104179689B CN104179689B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410194297.XA Active CN104179689B (en) | 2013-05-20 | 2014-05-09 | Draw-out type vertical-shaft pump |
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| Country | Link |
|---|---|
| JP (1) | JP6121239B2 (en) |
| KR (1) | KR101639038B1 (en) |
| CN (1) | CN104179689B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503977A (en) * | 2017-08-17 | 2017-12-22 | 上海凯泉泵业（集团）有限公司 | The withdrawable water pump of rotor that a kind of stator, runner envelope are fixed |
| CN108050107A (en) * | 2017-12-22 | 2018-05-18 | 湖南机电职业技术学院 | A kind of Drawing-Core guide-vane pump |
| CN110345104A (en) * | 2019-07-08 | 2019-10-18 | 株洲荣达电气股份有限公司 | Double tubular oil pumps of guide vane |
| TWI692586B (en) * | 2019-05-09 | 2020-05-01 | 大港泵浦廠興業有限公司 | Pump |
| TWI694211B (en) * | 2019-05-09 | 2020-05-21 | 大港泵浦廠興業有限公司 | Pump |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102262006B1 (en) * | 2015-04-28 | 2021-06-10 | 현대중공업터보기계 주식회사 | Fluid discharge guide of vertical pump |
| JP2019007431A (en) * | 2017-06-26 | 2019-01-17 | 株式会社クボタ | Turbopump |
| JP6927784B2 (en) * | 2017-07-19 | 2021-09-01 | 株式会社荏原製作所 | pump |
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| JP2008088905A (en) * | 2006-10-02 | 2008-04-17 | Hitachi Plant Technologies Ltd | Vertical shaft pump |
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| TWI692586B (en) * | 2019-05-09 | 2020-05-01 | 大港泵浦廠興業有限公司 | Pump |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104179689B (en) | 2017-04-12 |
| JP2014227862A (en) | 2014-12-08 |
| KR101639038B1 (en) | 2016-07-12 |
| JP6121239B2 (en) | 2017-04-26 |
| KR20140136382A (en) | 2014-11-28 |
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