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Dokumentenidentifikation EP1411250 29.12.2005
EP-Veröffentlichungsnummer 0001411250
Titel Bidirektionale hydraulische Pumpe
Anmelder Fagor, S.Coop, Mondragon, Guipuzcoa, ES
Erfinder Elexpuru Mezalde, Anton, 20500 Mondragon (Gipuzkoa), ES
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60302415
Vertragsstaaten AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LI, LU, MC, NL, PT, RO, SE, SI
Sprache des Dokument EN
EP-Anmeldetag 09.10.2003
EP-Aktenzeichen 033802273
EP-Offenlegungsdatum 21.04.2004
EP date of grant 23.11.2005
Veröffentlichungstag im Patentblatt 29.12.2005
IPC-Hauptklasse F04D 29/50
IPC-Nebenklasse F04D 15/00   

Beschreibung[en]
TECHNICAL FIELD

The present invention refers to bidirectional hydraulic pumps, and more particularly to bidirectional hydraulic pumps used in washing machines and dishwashers.

PRIOR ART

Some washing machines and dishwashers have the emptying of the waste water and recirculation of the washing water functions already included. These two functions can be carried out using two independent motors, one for each function, or using one bidirectional motor instead.

When a pump with a bidirectional motor is used, said pump comprises a hydraulic body with an inlet port that receives a water flow, a first outlet port for emptying and a second outlet port for recirculation. Hence, when the bidirectional motor turns in one direction, the water flow exits via one of the outlet ports and, when it turns in the opposite direction, the water flow exits via the other outlet port.

US 5,486,089 describes a bidirectional hydraulic pump that comprises in the interior of the hydraulic body a movable member that moves due to the action of the water flow and blocks either one of the outlet ports or the other depending on the direction of the water flow. Due to the space between the outlet ports and the impeller, and to the positioning of the outlet ports (at right angles to the hydraulic body), a load loss is produced in the pump.

JP09137790 discloses a bidirectional pump comprising blocking flaps, hingedly joined to the hydraulic body, which close one outlet port or the other depending on the direction of the water flow. In this bidirectional pump, eddies may be produced in the area of closure of the outlet ports. In addition, the geometric configurations of this kind of bidirectional pumps are difficult to assemble.

JP09137790 also shows a bidirectional pump wherein the piece that closes both outlet ports is hingedly joined to the shaft of the impeller. Joining said piece to the shaft of the impeller may lead to potential reliability problems and cause hydraulic inefficiency.

US 4,679,983 discloses a water pump for a window washer unit of a vehicle. The pump has a reversible motor, one inlet port and two outlet ports and is arranged to deliver water selectively to either one of the two outlet ports in dependence upon the direction of rotation of the motor. The pump comprises an impeller rotatable in a pump housing and a valve body surrounding the impeller and movable in dependence upon the direction of rotation of the motor to close the other of the two outlet ports. The valve body is in the form of a drum having a slotted hub which is urged by a clamping ring into frictional engagement with the drive shaft to constitute a slipping clutch. As the valve body is connected to the drive shaft, said valve body is moved by the direct action of said drive shaft.

DISCLOSURE OF THE INVENTION

The object of the invention is to provide a bidirectional hydraulic pump that overcomes some of the problems of the bidirectional hydraulic pumps of the prior art.

The bidirectional hydraulic pump of the invention comprises a hydraulic body comprising an inlet port which receives a water flow, a first outlet port and a second outlet port, and an impeller housed in said hydraulic body causing the water flow to move in either one direction or the other. The pump also comprises a valve body that surrounds the impeller, said valve body comprising at least one orifice.

The valve body is slidable on the internal surface of the hydraulic body in either direction due to the action of the water flow. Consequently, said valve body oscillates between a first position wherein said orifice is aligned with the first outlet port and a second position wherein said orifice is aligned with the second outlet port.

With the hydraulic pump of the invention load losses are minimised, simple and easy to assemble geometric configurations are obtained, and eddies which would be produced if the valve body was joined to the shaft of the impeller are avoided.

DESCRIPTION OF THE DRAWINGS

  • FIG. 1 is a first perspective view of the hydraulic body of an embodiment of the pump of the invention.
  • FIG. 2 is a second perspective view of the hydraulic body of FIG. 1.
  • FIG. 3 is a first perspective view of the valve body of an embodiment of the pump of the invention.
  • FIG. 4 is a second perspective view of the valve body of FIG. 3.

DETAILED DISCLOSURE OF THE INVENTION

In the embodiment of the invention of figures 1 to 4, the hydraulic pump of the invention comprises:

  • a hydraulic body 1, shown in figures 1 and 2, which has an inlet port 2 from which it receives a water flow, a first outlet port 3 and a second outlet port 4;
  • an impeller, not shown in the figures, that is housed in said hydraulic body 1 and causes the movement of the water flow in one direction or the other, activated by a bidirectional motor which is not shown in the figures either; and
  • a valve body 5, shown in figures 3 and 4, which surrounds the impeller, the valve body 5 comprising at least one orifice 6, along with an orifice 10 that makes access of the water flow into the interior of the hydraulic body 1 possible.

The valve body 5 slides on the internal surface of the hydraulic body 1 in either direction, due to the action of the water flow, between a first position wherein the orifice 6 is aligned with the first outlet port 3 and a second position wherein the orifice 6 is aligned with the second outlet port 4.

As shown in figures 3 and 4, in this embodiment the valve body 5 comprises a plurality of ribs 7 on its interior surface in order that the water flow displaces said valve body 5 in either one direction or the other.

On the other hand, the valve body 5 is slidable on the internal surface of the hydraulic body 1 by means of a sliding pin 8 and slot 9 connection, the pin 8 being placed on the valve body 5 and the slot 9 being placed on the hydraulic body 1.

In this embodiment, the hydraulic body 1 has a substantially cylindrical internal surface area, the inlet port 2 being coaxial with the turning axis of the impeller, and the outlet ports 3 and 4 being placed on the lateral peripheral surface of the hydraulic body 1. The valve body 5 is a hollow cylindrical body that is coaxial with the turning axis of the impeller, the orifice 6 being placed on the lateral peripheral surface of the hydraulic body 5. So, the valve body 5 moves with respect to the turning axis of the impeller. The valve body 5 has an orifice 10 coaxial with the turning axis of the impeller which, as a result of the circular movement of the valve body 5 with regard to the turning axis of the impeller, remains at all times aligned with the inlet port 2.


Anspruch[de]
  1. Eine bidirektional Hydraulikpumpe, umfassend:
    • einen Hydraulikkörper (1), umfassend eine Einlassöffnung (2), die einen Wasserfluss empfängt, eine erste Auslassöffnung (3) und eine zweite Auslassöffnung (4); und
    • ein Flügelrad, das im Hydraulikkörper (1) untergebracht ist, das dazu führt, dass sich der Wasserfluss in eine oder die andere Richtung bewegt;
    und
    • einen Ventilkörper (5), der das Flügelrad umgibt wobei der Ventilkörper (5) mindestens eine Ausmündung (6) umfasst und der Ventilkörper (5) auf der Innenfläche des Hydraulikkörpers (1) in die eine oder andere Richtung gleitend ist, zwischen einer ersten Position, in der die Ausmündung (6) mit der ersten Auslassöffnung (3) fluchtet, und einer zweiten Position, in der die Ausmündung (6) mit der zweiten Auslassöffnung (4) fluchtet,
    dadurch gekennzeichnet, dass der Ventilkörper (5) an seiner Innenfläche mindestens eine Auskragung umfasst, so dass der Wasserfluss den Ventilkörper (5) verdrängt, wobei der Ventilkörper (5) sich je nach der Richtung des Wasserflusses zur ersten Position bzw. zur zweiten Position bewegt.
  2. Eine bidirektionale Hydraulikpumpe nach Anspruch 1, wobei die Auskragungen Rippen (7) sind.
  3. Eine bidirektionale Hydraulikpumpe nach Anspruchs 1 oder 2, wobei der Ventilkörper (5) auf der Innenfläche des Hydraulikkörpers (1) mittels Verbindung mit Gleitstift (8) und Kerbe (9) verschiebbar gelagert ist.
  4. Eine bidirektionale Hydraulikpumpe nach einem der vorausgehenden Ansprüche, wobei der Hydraulikkörper (1) eine im Wesentlichen zylinderförmige Innenfläche besitzt, wobei die Einlassöffnung (2) koaxial zur Drehachse des Flügelrads steht und die Auslassöffnungen (3,4) auf der seitlichen Randfläche des Hydraulikkörpers (1) platziert sind und der Ventilkörper (5) ein zylinderförmiger Hohlkörper ist, der koaxial zur Drehachse des Flügelrads steht, wobei die Ausmündung (6) auf der seitlichen Randfläche des Ventilkörpers (5) platziert sind.
Anspruch[en]
  1. A bidirectional hydraulic pump that comprises:
    • a hydraulic body (1) comprising an inlet port (2) receiving a water flow, a first outlet port (3) and a second outlet port (4);
    • an impeller housed in the hydraulic body (1) which causes the water flow to move in one direction or the other;
       and
    • a valve body (5) that surrounds the impeller, the valve body (5) comprising at least one orifice (6) and said valve body (5) being slidable on the internal surface of the hydraulic body (1) in either one direction or the other, between a first position wherein the orifice (6) is aligned with the first outlet port (3) and a second position wherein the orifice (6) is aligned with the second outlet port (4),
    characterised in that the valve body (5) comprises on its inner surface at least one projection so that the water flow displaces the valve body (5), said valve body (5) moving to the first position or to the second position depending on the direction of said water flow.
  2. A bidirectional hydraulic pump as claimed in claim 1, wherein said projections are ribs (7).
  3. A bidirectional hydraulic pump as claimed in claims 1 or 2, wherein the valve body (5) is slidable on the internal surface of the hydraulic body (1) by means of sliding pin (8) and slot (9) connection.
  4. A bidirectional hydraulic pump as claimed in any one of the preceding claims, wherein the hydraulic body (1) has a substantially cylindrical inner surface, the inlet port (2) being coaxial with the turning axis of the impeller, and the outlet ports (3,4) being placed on the lateral peripheral surface of the hydraulic body (1), and the valve body (5) is a hollow cylindrical body that is coaxial with the turning axis of the impeller, the orifice (6) being placed on the lateral peripheral surface of the valve body (5).
Anspruch[fr]
  1. Une pompe hydraulique bidirectionnelle qui comprend :
    • un corps hydraulique (1) comprenant un orifice d'admission (2) recevant un écoulement d'eau, un premier orifice de refoulement (3) et second orifice de refoulement (4) ;
    • un impulseur placé dans le corps hydraulique (1) sous l'effet duquel l'eau se déplace dans un sens ou dans un autre ;
       et
    • un corps de vanne (5) qui entoure l'impulseur, le corps de vanne (5) comprenant au moins un orifice (6) et ledit corps de vanne (5) pouvant être glissé de part et d'autre de la paroi interne du corps hydraulique (1), entre une première position à laquelle l'orifice (6) est aligné sur le premier orifice de refoulement (3) et une deuxième position à laquelle l'orifice (6) est aligné sur le second orifice de refoulement (4),
       caractérisée en ce que le corps de vanne 5 comprend sur sa paroi interne au moins une projection, de manière à ce que l'écoulement d'eau déplace le corps de vanne (5), ledit corps de vanne (5) se plaçant sur la première ou deuxième position en fonction du sens d'écoulement de l'eau.
  2. Une pompe hydraulique bidirectionnelle selon la revendication 1 dans laquelle lesdites projections sont des tiges (7).
  3. Une pompe hydraulique bidirectionnelle selon la revendication 1 ou 2, dans laquelle le corps de vanne (5) peut être glissée sur la paroi interne du corps hydraulique (1) au moyen de la connexion d'une goupille coulissante (8) et d'une rainure (9).
  4. Une pompe hydraulique bidirectionnelle selon l'une quelconque des revendications précédentes, dans laquelle le corps hydraulique (1) est doté d'une paroi interne considérablement cylindrique, l'orifice d'admission (2) étant coaxial avec l'axe de rotation de l'impulseur et les orifices de refoulement (3, 4) étant placés sur la surface périphérique latérale du corps hydraulique (1) et le corps de vanne (5) est un corps cylindrique creux qui est coaxial avec l'axe de rotation de l'impulseur, l'orifice (6) étant placé sur la surface périphérique latérale du corps de vanne (5).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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