CN102192190A - Improved tight multi-stage pump - Google Patents
Improved tight multi-stage pump Download PDFInfo
- Publication number
- CN102192190A CN102192190A CN2011100702246A CN201110070224A CN102192190A CN 102192190 A CN102192190 A CN 102192190A CN 2011100702246 A CN2011100702246 A CN 2011100702246A CN 201110070224 A CN201110070224 A CN 201110070224A CN 102192190 A CN102192190 A CN 102192190A
- Authority
- CN
- China
- Prior art keywords
- external jacket
- cover frame
- housing lid
- moulding
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
-
- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
Abstract
The invention is a multi-stage pump (1) comprising an external jacket (2) with a suction port (3) and a delivery port (4), provided at one end with a casing cover (5) and at the opposite end with a lantern bracket (6) supporting an electric motor (7) associated with rotary pumping members (8). The casing cover (5) and the lantern bracket (6) are coupled to the ends of the external jacket (2) through fixing means with the interposition of annular gaskets (17). Each gasket is housed in an annular seat (18) defined by a shaped annular area (19) present in the casing cover (5) and the lantern bracket (6) and by a counter-shaped annular area (20) present in the corresponding end of the external jacket (2), opposing each other. The counter-shaped annular area (20) comprises an annular counteracting surface (20a), inclined with respect to the longitudinal axis (Y) defined by the external jacket (2), suited to compress the annular gasket (17) when the casing cover (5) and the lantern bracket (6) are coupled to the external jacket (2) through the tie rods. The external jacket (2) is provided with a plurality of shaped annular portions (28) suited to make the external jacket (2) elastically yielding along the direction defined by its longitudinal axis (Y) and the fixing means comprise a plurality of tie rods (12) each one of which is provided with a first end (12a) constrained to the casing cover (5) and a second end (12b) constrained to the lantern bracket (6).
Description
Technical field
The present invention relates to improved sealing multistage pump.
Background technique
As everyone knows, pump has sealing problem usually in qualification comprises the zone that the part of the housing of pumping unit is linked together.
In the sealing problem even occur in the multistage pump, the cover frame that usually occurs in housing lid and supporting motor and the zone that the external jacket of ccontaining pumping unit connects.
Known patent documentation EP 0 406 787 A2, JP 57 103400 U, US 5 407 323 A and EP 0 566 089 A1, the embodiment of the multistage pump that is provided with ring liner has been described, above-mentioned ring liner is contained in the annular seating, at this, sealing obtains by the inclination annular surface of compression gaskets.
In the operation, at the level place of sealing area, external jacket can expand owing to the fluid of internal pressure and heating.
Because this expansion, reduced with liner contact and therefore lose sealing, the aggravation step by step of this situation along with the use of the past of time and pump.
Summary of the invention
The objective of the invention is to eliminate or alleviate at least the shortcoming that this is generally acknowledged.
Particularly, the objective of the invention is to, compared with prior art, particularly in multistage pump, externally on the level of the attachment areas of the end of sheath place's housing lid and cover frame, improve the situation that liner provides sealing.
Another object of the present invention is to, guarantee that liner bears and keep constant compression force basically when the temperature of pump and change of pressure.
A further object of the present invention is to improve the rigidity of the mechanical coupling of housing lid and cover frame and external jacket at the height place in liner zone of living in.
Above-mentioned purpose reaches by the multistage pump with characteristic shown in the independent claims.
Other details as the pump of theme of the present invention describes in the dependent claims.
Advantageously, in multistage pump of the present invention, obtaining housing lid and covering frame does not need expensive modification is made in the design of pump with the sealing that connects of external jacket.
Still advantageously, use the liner identical liner used, can obtain the sealing of higher degree, thereby improve its stability, and improve its operating conditions with prior art.
Description of drawings
Schematically in the explanation of the preferred embodiments of the present invention that non-limitative example provides, will more specifically give prominence to above-mentioned purpose and advantage at the following of reference accompanying drawing in this conduct, wherein:
Fig. 1 illustrates as the part of the pump of theme of the present invention, longitdinal cross-section diagram;
Fig. 2 illustrates the details of the amplification of Fig. 1;
Fig. 3 illustrates the details of the amplification of Fig. 2;
Fig. 4 illustrates the details of the amplification of Fig. 3;
Fig. 5 illustrates the details of another amplification of Fig. 2;
Fig. 6 illustrates the details of the amplification of Fig. 5.
Embodiment
As the multistage pump of theme of the present invention, at this, this multistage pump integral body is expressed as 1 shown in Fig. 1.
Can see, this multistage pump comprises the external jacket 2 that is essentially cylindrical shape, mainly extends longitudinally, in this external jacket 2, can limit near suction port 3 and the delivery outlet 4 in an end that is arranged in external jacket, housing lid 5 is applied on this end of external jacket 2.
Externally have cover frame 6 on the opposite end of sheath, 6 supportings of cover frame are by the motor 7 of the assembly of 8 rotations of indicating as a whole and static component, and the arrangement of components of rotation and static component is the inside of sheath 2 externally.
Rotation and static component assembly 8 about comprising among the figure can be any type.
On the level of through hole 11 that enters into cover frame 6 from axle 10, specific liner 9 is guaranteed motor 7 is connected to axle 10 and the sealing of covering between the frame 6 on the pumping unit 8.
The sealing of attachment areas guarantees by inserting ring liner 17, ring liner 17 preferably but not necessarily by can buy on the open market and constitute for the elastic ring of known O shape ring.
Illustrate in greater detail to 6 as accompanying drawing 4, each described liner 17 is contained in the annular seating 18, annular seating 18 is limited with reverse-forming annular region 20 mutually by moulding annular region 19 respect to one another, moulding annular region 19 is present in housing lid 5 and the cover frame 6, and phase reverse-forming annular region 20 is present in the respective end of external jacket 2.
Can see, phase reverse-forming annular region 20 comprises annular reaction surface 20a, annular reaction surface 20a tilts with respect to the longitudinal axis Y that is limited by external jacket 2, and is suitable for compression ring liner 17 when housing lid 5 is connected on the external jacket 2 with cover frame 6.
Particularly, can see that the moulding annular region 19 that is present in the housing lid 5 belongs to lamination element 21, when housing lid 5 is connected on the external jacket 2, the surface towards the inside of external jacket 2 of lamination element 21 covering shells lid 5.
Similarly, can see, be present in the moulding annular region 19 of cover in the frame 6 and belong to lamination element 22, when cover frame 6 is connected on the described external jacket 2, the surface towards the inside of external jacket 2 of lamination element 22 cover framves 6.
At last, when assembling during pump, each phase reverse-forming annular region 20 is arranged in the front of each corresponding moulding annular region 19, and externally the level place of each the end 2a in the main body of sheath 2 obtains.
When being connected on the external jacket 2 with cover frame 6, housing lid 5 limits annular seating 18, the cross section of the annular seating 18 that obtains according to the plane of passing the longitudinal axis Y that is limited by external jacket 2 is right-angled trapezium basically, and the hypotenuse of right-angled trapezium is corresponding to annular reaction surface 20a.
Particularly, when fixing device with active force during with respect to the end 2a of external jacket 2,2b rugged housing lid 5 and cover frame 6, annular surface 20a reacts on liner 17, above-mentioned active force produces:
-with respect to the axial thrust load of the bottom 18a of annular seating 18 pushing liner 17, and
-be tending towards inflated insert 17 to make radial component on its wall 18b that is attached to annular seating 18, that is, and with respect to the moulding annular region 19 that limits annular seating 18 and the sidewall of reverse-forming annular region 20 mutually.
The degree of sealing is by the fastening degree decision of fixing device.
According to the present invention, as the fixing device that is shown specifically in Fig. 2 and 3, comprise a plurality of pull bars 12, wherein, each pull bar 12 has the first thread head 12a and the second thread head 12b, the first thread head 12a precession is present in the tapped hole 14 in the housing lid 5, and the second thread head 12b is limited in the through hole that is formed in the cover frame 6 by nut 16.
According to the present invention, external jacket 2 has a plurality of moulding ring parts 28 once more, and moulding ring part 28 is suitable for making the direction elastic buckling of external jacket 2 axis Y qualification longitudinally.
Particularly, moulding ring part 28 has the convex side towards the inside of external jacket 2, moulding ring part 28 according to layout parallel to each other and with the longitudinal axis intercross arrangement of external jacket 2, be used for when external jacket 2 is subjected to axial load, making external jacket 2 elastic bucklings.
Therefore, fastening pull rod 12 is fixed to housing lid 5 and cover frame 6 on the end 2a of external jacket 2, makes external jacket 2 by axial push, and the characteristic of therefore simulating spring is carried out preload.
Operation period, the any extension that causes owing to the raising of the increase of pressure or temperature by since the elastic recovery that preload is caused absorb, this allows to keep constant with respect to the thrust of liner 17, wherein, is giving external jacket with above-mentioned preload when adjusting fastening assembling of pull bar.
Like this, realized first purpose, that is,, improved the purpose of the sealing of liner 17 by increasing adhesive force with respect to the wall of the annular seating 18 that comprises liner 17.
In addition, the present invention guarantees compressive force substantial constant that liner 17 bears and the purpose that not influenced by pump temperature and working pressure by suitably adjusting the fastening degree of pull bar 12, also reaching.
Also improve sealing with the mechanical stiffness that cover frame 6 is connected on the external jacket 2 by improving housing lid 5.
In fact, can see at length from Fig. 4 and 6 that housing lid 5 and cover frame 6 are provided with circular groove 25, when pull bar 12 is mechanically connected to external jacket 2 on cover frame 6 housing lid 5, the periphery of the respective end 2a of circular groove 25 ccontaining external jackets 2.
Like this, each end 2a of external jacket 2 keep being limited in its in the ccontaining circular groove 25, eliminated basically because heat or pressure may appear at any radial motion of the external jacket in this zone.
This has improved the stability of liner significantly, and also influences its sealing through certain hour energetically.
According to the preferred embodiments of the present invention described herein, the cross section of each is isosceles-trapezium-shaped haply in the moulding ring part of the external jacket 2 that forms according to the plane of passing longitudinal axis Y.
Yet significantly, described forming part can have section and shape arbitrarily, for example circular arc or other shape, and the convex side of forming part can be towards the inside or the outside of external jacket 2.
About suction port 3 and delivery outlet 4, can see on its level separately, having by weld seam 31,41 and be directly connected to sleeve 30 and 40 on the external jacket 2, weld seam 31 and 41 utilizes a realization in known automatic or the manual welding system.
Described sleeve 30,40 is applied directly on the external jacket 2 by being welded to connect, and has simplified pump structure and has reduced cost.
Significantly, each sleeve 30,40 can be provided with for example flange 32,42, so that pump 1 is connected on unshowned external straw and the output tube, flange 32,42 is suitable for relative flange ccontaining and its connection, and is not shown.
Selectively, sleeve 30,40 can be connected on the exterior tube by screw thread or other known connected system.
Based on the above, very clear, realized all predetermined purposes as the multistage pump of theme of the present invention.
Particularly, illustrate, by can prove conclusively the liner sealing of the improvement after after a while in conjunction with following steps:
-make external jacket 2 have axial elasticity by moulding ring part 28;
-use pull bar 12, can adjust the power of axially fastening.
In addition, by end 2a that strengthens external jacket 2 and the mechanical connection that housing lid 5 and cover frame 6 connect, obtain other improvement, particularly about liner stability.
Significantly, at construction phase, pump of the present invention may stand modifications and variations, and above-mentioned modifications and variations can comprise for example different sections of the annular seating of ccontaining liner, even has the annular seating of different quantity.
In addition, as mentioned above, the form of the moulding ring part that externally obtains on the sheath and quantity can be different from said and shown in form and quantity.
At last, each end that also can change external jacket 2 is mechanically connected to the mode on corresponding housing lid 5 and the corresponding cover frame 6, make its be different from said and shown in operation.
All variant embodiments described herein, and also unshowned other embodiment of not description that should be applied to pump of the present invention as long as it falls within the scope of claims, must think so and be protected by this patent.
The technical characteristics place that mentions in arbitrary claim is all with reference mark; the purpose that comprises these reference marks only is the intelligibility that increases claim; therefore, these reference marks to the protection of each element of indicating by way of example by these reference marks without any restriction.
Claims (9)
1. a multistage pump (1), comprise the external jacket (2) that is essentially tubulose, described external jacket (2) mainly extends in the vertical, and have at least one suction port (3) and at least one delivery outlet (4), described external jacket (2) is provided with housing lid (5) at one end, and be provided with cover frame (6) at opposite end place, described cover frame (6) supports the motor (7) that the rotation pumping member (8) inner with being arranged in described external jacket (2) is associated, described housing lid (5) and described cover frame (6) mechanically and removably are connected on the end of described external jacket (2) by the fixing device that is inserted with ring liner (17), each of described ring liner (17) all is contained in the annular seating (18), described annular seating (18) is limited by the relative moulding annular region (20) that is present in the moulding annular region (19) in described housing lid (5) and the described cover frame (6) and be present in the respective end portions of described external jacket (2), described moulding annular region (19) and described relative moulding annular region (20) are toward each other, described relative moulding annular region (20) comprises annular reaction surface (20a), described annular reaction surface (20a) tilts with respect to the longitudinal axis (Y) that is limited by described external jacket (2), when described housing lid (5) and described cover frame (6) are connected to described external jacket (2) when going up by described fixing device, described annular reaction surface (20a) is suitable for compressing described ring liner (17), it is characterized in that, described external jacket (2) is provided with a plurality of moulding ring parts (28), described moulding ring part (28) is suitable for making described external jacket (2) flexibly to surrender along the direction that is limited by described longitudinal axis (Y), and, described fixing device comprises a plurality of pull bars (12), and each described pull bar (12) has the first end (12a) that is limited on the described housing lid (5) and is limited in the second end (12b) on the described cover frame (6).
2. multistage pump according to claim 1 (1), it is characterized in that, described housing lid (5) and described cover frame (6) are provided with circular groove (25), when described fixing device is mechanically connected to described housing lid (5) and described cover frame (6) described external jacket (2) and goes up, the periphery of the respective end portions (2a) of the ccontaining described external jacket of described circular groove (25) (2).
3. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that, in the main body of described external jacket (2), form the described relative moulding annular region (20) in each end that is present in described external jacket (2).
4. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that, the described moulding annular region (19) that is present in the described housing lid (5) belongs to lamination element (21), when described housing lid (5) is connected to described external jacket (2) when going up, described lamination element (21) covers the surface towards the inside of described external jacket (2) of described housing lid.
5. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that, the described moulding annular region (19) that is present in the described cover frame (6) belongs to lamination element (22), when described cover frame (6) is connected to described external jacket (2) when going up, described lamination element (22) covers the surface towards the inside of described external jacket (2) of described cover frame (6).
6. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that the cross section of the described annular seating (18) that forms according to the plane of passing the longitudinal axis (Y) that is limited by described external jacket (2) is essentially the shape of right-angled trapezium.
7. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that, each of described suction port (3) and described delivery outlet (4) is provided with sleeve (30,40), and described sleeve (30,40) is directly connected on the described external jacket (2) by at least one weld seam (31,41).
8. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that, the cross section of each of the described moulding ring part (28) that forms according to the plane of passing the longitudinal axis (Y) that is limited by described external jacket (2) is a trapezoidal shape, and described trapezoidal convex side is towards the inside of described external jacket (2).
9. according to each described multistage pump (1) in the aforementioned claim, it is characterized in that, in each of described pull bar (12), described first end (12a) is threaded, and be limited in being present in the tapped hole (14) in the described housing lid (5), described the second end (12b) is threaded, and is limited in the through hole that is formed in the described cover frame (6) by nut (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITVI2010A000075A IT1398811B1 (en) | 2010-03-18 | 2010-03-18 | PERFORMED MULTISTAGE PUMP |
| ITVI2010A000075 | 2010-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102192190A true CN102192190A (en) | 2011-09-21 |
| CN102192190B CN102192190B (en) | 2014-01-29 |
Family
ID=43012668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110070224.6A Active CN102192190B (en) | 2010-03-18 | 2011-03-16 | Improved tight multi-stage pump |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2366905B1 (en) |
| CN (1) | CN102192190B (en) |
| DK (1) | DK2366905T3 (en) |
| HK (1) | HK1160908A1 (en) |
| IT (1) | IT1398811B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2818722B1 (en) * | 2013-06-24 | 2019-01-09 | Grundfos Holding A/S | Centrifugal pump |
| DE102014207562A1 (en) * | 2014-04-22 | 2015-10-22 | E.G.O. Elektro-Gerätebau GmbH | pump |
| US20180058464A1 (en) * | 2016-08-24 | 2018-03-01 | Q.E.D. Environmental Systems, Inc. | Pump Having Edge Mounted O-Ring Seal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57103400U (en) * | 1980-12-17 | 1982-06-25 | ||
| EP0406787A2 (en) * | 1989-07-05 | 1991-01-09 | Ebara Corporation | Case, particularly for centrifugal radial pumps, and method for manufacturing thereof |
| EP0566089A1 (en) * | 1992-04-14 | 1993-10-20 | Ebara Corporation | Pump casing made of sheet metal |
| US5407323A (en) * | 1994-05-09 | 1995-04-18 | Sta-Rite Industries, Inc. | Fluid pump with integral filament-wound housing |
| CN2643030Y (en) * | 2003-07-22 | 2004-09-22 | 何必超 | Easy-to-disassemble multi-stage pump |
| CN1989347A (en) * | 2004-07-16 | 2007-06-27 | 株式会社荏原制作所 | Centrifugal pump |
-
2010
- 2010-03-18 IT ITVI2010A000075A patent/IT1398811B1/en active
-
2011
- 2011-03-16 CN CN201110070224.6A patent/CN102192190B/en active Active
- 2011-03-16 EP EP11158552.7A patent/EP2366905B1/en active Active
- 2011-03-16 DK DK11158552T patent/DK2366905T3/en active
-
2012
- 2012-02-13 HK HK12101402.6A patent/HK1160908A1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57103400U (en) * | 1980-12-17 | 1982-06-25 | ||
| EP0406787A2 (en) * | 1989-07-05 | 1991-01-09 | Ebara Corporation | Case, particularly for centrifugal radial pumps, and method for manufacturing thereof |
| EP0566089A1 (en) * | 1992-04-14 | 1993-10-20 | Ebara Corporation | Pump casing made of sheet metal |
| US5407323A (en) * | 1994-05-09 | 1995-04-18 | Sta-Rite Industries, Inc. | Fluid pump with integral filament-wound housing |
| CN2643030Y (en) * | 2003-07-22 | 2004-09-22 | 何必超 | Easy-to-disassemble multi-stage pump |
| CN1989347A (en) * | 2004-07-16 | 2007-06-27 | 株式会社荏原制作所 | Centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2366905A2 (en) | 2011-09-21 |
| ITVI20100075A1 (en) | 2011-09-19 |
| IT1398811B1 (en) | 2013-03-18 |
| HK1160908A1 (en) | 2012-08-17 |
| EP2366905A3 (en) | 2012-11-21 |
| DK2366905T3 (en) | 2015-03-23 |
| EP2366905B1 (en) | 2014-12-24 |
| CN102192190B (en) | 2014-01-29 |
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