EP1013935B1 - Pompe horizontale autoamorçante à orifice axial - Google Patents
Pompe horizontale autoamorçante à orifice axial Download PDFInfo
- Publication number
- EP1013935B1 EP1013935B1 EP19990403237 EP99403237A EP1013935B1 EP 1013935 B1 EP1013935 B1 EP 1013935B1 EP 19990403237 EP19990403237 EP 19990403237 EP 99403237 A EP99403237 A EP 99403237A EP 1013935 B1 EP1013935 B1 EP 1013935B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- orifice
- end plate
- pump body
- suction
- 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.)
- Expired - Lifetime
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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
- F04D9/00—Priming; Preventing vapour lock
- F04D9/007—Preventing loss of prime, siphon breakers
- F04D9/008—Preventing loss of prime, siphon breakers by means in the suction mouth, e.g. foot valves
Definitions
- the present invention relates to the field of pumps, and more particularly self-priming pumps.
- These self-priming pumps can, because of their particular structure, start without having to be placed lower than the liquid to be pumped, in other words with a vacuum water suction line; this structure ensures that the body of pump, before starting, contains a sufficient volume of water at start-up to perform the self-priming function. This volume of water remains in the pump body when it is stopped and allows the pump to be primed when it is started from new.
- the priming of the pump is also ensured by a valve arranged between the suction part and discharge part of the pump, which remains open during priming of the pump, and closes after the end of the priming phase. The opening of the valve during the priming phase makes it possible to essentially discharge air, until you have drawn liquid from the suction side of the pump. At this time, the valve closes, and the pump operates the same as a conventional pump.
- a volute is placed in the pump housing, between the orifice and the impeller of the pump. On the side of the suction opening, the volute has an opening opposite the suction opening in the upper part of the pump. On the side of the wheel, the opening of the volute is central.
- the document FR-1 199 382 describes a centrifugal pump Self-priming.
- This pump includes a rotor rotating in a housing. The liquid is sucked from a central inlet opening of the housing. The liquid is discharged by the rotor into the volute of a casing, then discharged out of the pump. A sump is placed at the bottom of the housing, below the inlet of the housing and contains a reserve of pump priming liquid. The rotor plunges into the sump. When starting the pump, the rotor drives the liquid and air from the sump in the volute to initiate pumping and evacuate air out of the housing.
- the suction port is often placed on the axial end of the pump body, on the axis of rotation of the rotor.
- the invention relates to the new problem posed by this arrangement of the suction port in horizontal self-priming pumps. Indeed, this mandatory arrangement of the priming hole prevents simple replacement of a conventional pump by a self-priming pump having the same geometric characteristics. It is indeed necessary to modify the conduct suction so that it is connected to the suction opening at the top of the pump body.
- the invention proposes a solution to this new problem. She allows to provide a horizontal self-priming pump with an axial suction port, or even arranged in the lower part of the pump. It thus avoids the constraints of position of the suction port encountered with pumps of the prior art.
- the invention proposes a horizontal self-priming pump, having a pump body with a suction port, at least one movable impeller rotating inside the pump body, and a flange in the pump body between the suction opening and the wheel, the flange having in its upper part a orifice.
- This orifice is above the suction orifice; otherwise, the bottom edge of the flange hole is above the edge bottom of the suction port.
- the orifice in the flange has a shape of disk segment.
- the orifice in the flange has a section equal to the cross section of the pump body suction port.
- the suction port is disposed in the body of pump along the axis of the pump.
- the flange present in its lower part a shape substantially similar to that of the pump body.
- the pump has a plurality of stages, each stage comprising a stage body and a wheel, and the flange is formed in a cell suction mounted between the pump body and a stage body.
- the suction cell preferably includes means for coding ensuring a determined radial positioning in the pump body.
- the suction cell includes polarization means ensuring a determined radial positioning with respect to the adjacent stage body.
- the invention also relates to a flange in a self-priming pump. horizontal, having fixing means in a pump body and an orifice in its upper part.
- the flange has in its lower part a shape convex. It can also include keying means.
- the invention finally relates to a suction cell comprising such a flange.
- the invention proposes, in a self-priming pump, to have inside of the pump body a flange allowing to maintain in the pump body the amount of water allowing the pump to self-prime.
- the flange has a opening in its upper part. The presence of the flange allows to have the suction port in any position on the pump body, and especially below the orifice of the flange. In other words, the lower part of the opening of the flange is above the lower part of the opening of the pump.
- FIG. 1 shows a schematic representation in axial section of a pump according to the invention; we recognize in the figure the pump motor 1, which is not described in more detail.
- This motor rotates a shaft 2.
- a motor support lantern 3 On the motor is fixed a motor support lantern 3, in molded plastic, which serves as a side wall for the suction zone 4 and delivery zone 5 of the pump.
- the support lantern 3 is crossed by the shaft 2 of the motor; at the east crossing arranged a mechanical seal 6 which seals the pump.
- the pump of the figure then comprises along the shaft a plurality of stages - five in the case of the figure, which each consist of a stage body 8, 10, 12, 14 and 16 and a wheel 9, 11, 13, 15 and 17.
- the bodies are stacked and arranged against the support lantern; the wheels are interposed with the stage bodies, and are superimposed along the motor shaft.
- a nut 19 ensures the axial fixing of the wheels on the shaft.
- the last stage body 16 - that is to say the one furthest from the engine - Has a valve 20.
- This valve is opened during priming of the pump and closes during normal pump operation; during priming the pump, it connects the suction zone 4 and the discharge zone 5 of the pump, so as to discharge only mainly from the air.
- a pump body for example a pump body 21 of stamped metal having welded suction and discharge 23 and discharge orifices 23, is fixed to the engine support lantern 3.
- the lantern and the pump bodies are fixed to each other and fixed to the motor by nuts or screws 24.
- the pump body keeps the various stage bodies in position.
- the assembly of the pump of FIG. 1 is carried out simply by mounting of the lantern, then the trim. We then mount the floor bodies, and the wheels corresponding. After fixing the wheels on the shaft with the nut, you can mount and fix the pump body.
- the pump also has a suction cell 25, which comprises a flange 26, with an orifice 27 in its upper part.
- a suction cell 25 which comprises a flange 26, with an orifice 27 in its upper part.
- the suction cell is mounted between the last stage body - the one furthest from the engine - and the body of pump. It is thus held in place due to its position.
- the last stage body, the suction cell and the pump body have means for polarizing, typically polarizing like pins or others, which ensure correct assembly of these various elements.
- the means of coding ensure that the orifice 27 formed in the suction cell is located same side as the discharge port 23 of the pump body.
- the means of coding between the last pump body 16 and the suction cell ensure that the valve 20 is on the side opposite to the orifice 27.
- the orifice 27 is located upwards, and makes it possible to maintain an amount of water necessary for priming in the pump body; the valve is located in the lower part of the pump, and thus closes more quickly when pressure build-up on the discharge side.
- the pump body discharge port is located upwards, so as to essentially expel air when the pump.
- Figure 2 shows a radial schematic representation of a flange according to the invention; we recognize in the figure the hole 27 formed at the top of the flange.
- the flange has a circular shape.
- the opening presents a shape of half-moon, or segment of disc.
- the orifice is arranged in the body of pump as high as possible; the orifice has on the other hand a lower edge horizontal, which corresponds to the level of water in the pump body when the pump is stopped.
- the shape of the orifice ensures it a maximum surface for a maximum quantity of water retained in the pump when it is stopped.
- the surface of the orifice is determined so as to be at least equal to the cross section of the pump body suction port. More precisely, the projection of the orifice on the direction perpendicular to the flow of water sucked in is preferably equal to the section of the suction port of the pump body. This configuration and this surface of the orifice ensure that the suction flow of the pump is not limited by the orifice, and that this allows the maximum volume of water remain in the pump casing when the pump is stopped.
- Figure 3 shows a schematic representation in radial section of a suction cell according to the invention.
- the annular part 28 of the cell which is intended to mate on the last stage body.
- This part ring also defines a limit between the suction zone 4 of the pump, inside of the annular wall, and the discharge zone 5 of the pump, outside the wall annular.
- the end wall of the suction cell, which forms the flange has in its upper part the orifice 27, and has a swollen lower part 29 or convex, which substantially follows the shape of the pump body. In this way, the convexity of the lower part is directed towards the stage bodies, and provides a additional volume for water retention in the pump body.
- the shape of the flange is such that the volume formed between the flange and the pump body allows the passage of aspirated water.
- the flange has fixing means in the pump body, formed by the annular part, and an orifice for the passage of the aspirated water.
- the operation of the pump of the invention is identical to that of a known self-priming pump.
- the orifice pump suction can be arranged not only in the upper part of the pump body, but in any position on the end thereof, and in particular in below the flange opening.
- the pump of the invention can advantageously have a priming valve of the type described in the patent application filed the same day by the applicant under the heading "Priming valve for self-priming pump”.
- the suction port of the pump is axial; it is clear that due to the presence of the flange of the invention, the position of the suction port can be arbitrary. We can thus provide an orifice on the lower part of the axial end of the pump body, or on the side part of the pump body.
- a pump with a flange according to the invention without this flange is not necessarily mounted on a suction cell as in preferred embodiments.
- the flange could be mounted on the pump body; for example, the flange can be stamped at the same time as the pump body, and the suction port would then be mounted on a welded cover or assembled on the pump body.
- the pump is a multi-stage pump, with five stages, each consisting of a stage body and a wheel.
- the invention applies also to pumps with a different configuration, and for example to single impeller pumps.
- liquid discharged by the pump is water.
- the invention also applies to pumps intended to deliver other liquids.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- figure 1 une représentation schématique en coupe axiale d'une pompe selon l'invention;
- figure 2 une représentation schématique radiale d'un flasque selon l'invention;
- figure 3 une représentation schématique en coupe radiale d'une cellule d'aspiration selon l'invention..
Claims (12)
- Une pompe autoamorçante horizontale, présentant un corps de pompe (21) avec un orifice d'aspiration (22), au moins une roue (9, 11, 13, 15, 17) mobile en rotation à l'intérieur du corps de pompe, et un flasque (26) dans le corps de pompe entre l'orifice d'aspiration et la roue, le flasque présentant dans sa partie supérieure un orifice (27), cet orifice (27) du flasque étant au-dessus de l'orifice d'aspiration et le bord inférieur de l'orifice (27) du flasque étant au-dessus du bord inférieur de l'orifice d'aspiration.
- La pompe selon la revendication 1, caractérisée en ce que l'orifice (27) dans le flasque (26) présente une forme de segment de disque.
- La pompe selon l'une des revendications 1 ou 2, caractérisée en ce que l'orifice (27) dans le flasque présente une section égale à la section de l'orifice d'aspiration (22) du corps de pompe (21).
- La pompe selon l'une des revendications 1 à 3, caractérisée en ce que l'orifice d'aspiration (22) est disposé dans le corps de pompe (21) suivant l'axe de la pompe.
- La pompe selon l'une des revendications 1 à 4, caractérisée en ce que le flasque (26) présente dans sa partie inférieure (29) une forme sensiblement voisine de celle du corps de pompe. (21).
- La pompe selon l'une des revendications 1 à 5, caractérisée en ce qu'elle présente une pluralité d'étages, chaque étage comprenant un corps d'étage (8, 10, 12, 14, 16) et une roue (9, 11, 13, 15, 17), et en ce que le flasque est formé dans une cellule d'aspiration (25) montée entre le corps de pompe et un corps d'étage.
- La pompe selon la revendication 6, caractérisée en ce que la cellule d'aspiration (25) comporte des moyens de détrompage assurant un positionnement radial déterminé dans le corps de pompe (21).
- La pompe selon la revendication 6 ou 7, caractérisée en ce que la cellule d'aspiration (25) comporte des moyens de détrompage assurant un positionnement radial déterminé par rapport au corps d'étage adjacent.
- Un flasque (26) dans une pompe autoamorçante horizontale selon l'une des revendications 1 à 8, présentant des moyens de fixation dans un corps de pompe (21) et un orifice (27) dans sa partie supérieure.
- Le flasque (26) selon la revendication 9, caractérisé en ce qu'il présente dans sa partie inférieure (29) une forme convexe.
- Le flasque selon la revendication 9 ou 10, caractérisé en ce qu'il comporte des moyens de détrompage.
- Une cellule d'aspiration comportant un flasque selon l'une des revendications 9 à 11.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9816149A FR2787525B1 (fr) | 1998-12-21 | 1998-12-21 | Pompe horizontale autoamorcante a orifice axial |
FR9816149 | 1998-12-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1013935A1 EP1013935A1 (fr) | 2000-06-28 |
EP1013935B1 true EP1013935B1 (fr) | 2002-11-13 |
Family
ID=9534250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990403237 Expired - Lifetime EP1013935B1 (fr) | 1998-12-21 | 1999-12-21 | Pompe horizontale autoamorçante à orifice axial |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1013935B1 (fr) |
DE (1) | DE69903904T2 (fr) |
FR (1) | FR2787525B1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102734203B (zh) * | 2012-07-17 | 2014-08-20 | 浙江佳力科技股份有限公司 | 卧式多级泵轴向进口装置及其连接结构 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE420038A (fr) * | 1937-02-16 | 1937-03-31 | Acec | Pompes multicellulaires auto-amorçantes |
FR861775A (fr) * | 1938-12-02 | 1941-02-17 | Système d'amorçage pour pompes centrifuges | |
FR1029582A (fr) * | 1949-10-29 | 1953-06-03 | Pompe centrifuge à aspiration automatique | |
FR1199382A (fr) * | 1957-12-11 | 1959-12-14 | Pompe centrifuge à amorçage automatique | |
IT1257704B (it) * | 1991-12-05 | 1996-02-01 | Nocchi Pompe Spa | Pompa per acqua plurifunzionale: centrifuga, per aspirazione profonda,autoadescante, centrifuga con regolazione di pressione, autoadescante con regolazione di pressione, con dispositivo di avviamento e/0 arresto automatico |
DE4415157A1 (de) * | 1994-05-02 | 1995-11-09 | Klein Schanzlin & Becker Ag | Selbstansaugende mehrstufige Kreiselpumpe |
DE19606916A1 (de) * | 1996-02-15 | 1997-08-21 | Ver Energiewerke Ag | Einrichtung zur Verhinderung des Trockenlaufs von nicht selbstansaugenden Pumpen nach einem Pumpenstillstand und Wiederinbetriebnahme |
-
1998
- 1998-12-21 FR FR9816149A patent/FR2787525B1/fr not_active Expired - Fee Related
-
1999
- 1999-12-21 EP EP19990403237 patent/EP1013935B1/fr not_active Expired - Lifetime
- 1999-12-21 DE DE1999603904 patent/DE69903904T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69903904D1 (de) | 2002-12-19 |
DE69903904T2 (de) | 2003-08-21 |
FR2787525A1 (fr) | 2000-06-23 |
EP1013935A1 (fr) | 2000-06-28 |
FR2787525B1 (fr) | 2002-05-24 |
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