DE2923648C2

DE2923648C2 - Electromagnetically operated fluid control valve

Info

Publication number: DE2923648C2
Application number: DE2923648A
Authority: DE
Inventors: Alec Harry North Wembley Middlesex Seilly
Original assignee: Lucas Industries Ltd
Current assignee: ZF International UK Ltd
Priority date: 1978-07-12
Filing date: 1979-06-11
Publication date: 1986-12-04
Also published as: DE2923648A1; SU1075994A3; FR2431084A1; JPS5517786A; IT7924220A0; IT1122088B; JPS6227312B2; FR2431084B1; MX146772A; ES480450A1

Description

magnetisierbarem Werkstoff, und der Elektromagnet 17 ist an einem Endverschluß 23 befestigt oder bildet einen Teil desselben; der Endverschluß 23 ist im offenen Ende des Ventilgehäuses 10 mit einer Haltekappe 24 gehaltert, die bei dem Ausführungsbeispiel ein Gewinde aufweist, das mit einem am Ventilgehäuse 10 ausgebildeten Gewinde verschraubt ist Die Wicklungsenden sind mit Anschlußklemmen 25 verbunden.magnetizable material, and the electromagnet 17 is attached to or forms part of an end closure 23; the end closure 23 is in the open end of the valve housing 10 is held with a retaining cap 24 which, in the exemplary embodiment, has a thread, which is screwed to a thread formed on the valve housing 10. The winding ends are with Terminals 25 connected.

Der Zapfenteil 11 weist einen axialen Durchgang 26 auf, der über einen schräg verlautenden Durchgangsabschnitt 27 und einen weiteren axialen Durchgang 28 mit dem Inneren des becherförmigen Ventilgehäuses 10 in Strömungsverbindung steht Ferner weist der Flansch 15 des Ventilgehäuses 10 Strömungskanäle 29 auf, die eine Fluidströmung zwischen den entgegengesetzten Seiten des Flansches ermöglichen.The journal part 11 has an axial passage 26 on, which has a sloping passage section 27 and a further axial passage 28 the interior of the cup-shaped valve housing 10 is in flow connection. Furthermore, the flange 15 of the valve housing 10 flow channels 29, the fluid flow between the opposite Allow sides of the flange.

Im Betrieb wird dem Kanal 13 unter Druck stehendes Fluid zugeführt und wenn der Elektromagnet unerregt ist wird das Verschlußstück 14 durch die Kraft der Feder 21 auf dem Ventilsitz gehalten. Wenn die Wicklung erregt wird, nehmen die Polstücke IS, 19 entgegengesetzte magnetische Polarität an, und das Verschlußstück 14 bildet einen Anker zwischen den Polstücken 18,19 und wird zu diesen hin verschoben, so daß der magnetische Widerstand des Magnetkreises vermindert wird. Daher wird das Ende des Verschlußstücks 14 von der Sitzfläche abgehoben, so daß Fluid durch den Einlaßkanal 12 in den becherförmigen Abschnitt einströmen und durch die Durchgänge 28,17 und 26 ausströmen kann. Die Bewegung des Verschlußstücks 14 wird durch die Kugel 16 geführt die durch den Fluiddruck an dem Einlaßkanal 12 in die Ausnehmung 20 gedrückt wird, wenn das Verschlußstück 14 in der Schließstellung ist. Bei Offenstellung des Ventils ist das Verschlußstück 14 im we· sentlichen druckabgeglichen, und in der Schließstellung bietet es eine sehr kleine Fläche dar, die von dem Fluiddruck in dem Einlaßkanal 12 beaufschlagt wird zum Erzeugen einer Kraft, der die Feder 21 entgegenwirken muß. Somit kann die Feder 21 relativ schwach sein, und der Elektromagnet 17 braucht nicht besonders stark zu sein, um die von der Feder 21 ausgeübte Kraft zu überwinden, selbst wenn im Einlaßkanal 12 ein sehr niedriger Fluiddruck herrscht. Wenn das Verschlußstück 14 die Offenstellung einnimmt, ist die Kugel 16 druckabgeglichen, da die konische Ausnehmung 20 keine Dichtung mit der Kugel 16 bildetIn operation, the channel 13 is supplied with fluid under pressure and when the electromagnet is de-energized is the closure piece 14 is held by the force of the spring 21 on the valve seat. When the winding is excited, the pole pieces IS, 19 adopt opposite magnetic polarity, and the locking piece 14 forms an armature between the pole pieces 18,19 and is moved towards these so that the magnetic Resistance of the magnetic circuit is reduced. Therefore, the end of the locking piece 14 of the Seat raised so that fluid flows through the inlet channel 12 into the cup-shaped section and through the passages 28, 17 and 26 can flow out. The movement of the closure piece 14 is through the Ball 16 guided by the fluid pressure at the inlet channel 12 is pressed into the recess 20 when the locking piece 14 is in the closed position. When the valve is in the open position, the closing piece 14 is in the white Substantial pressure balanced, and in the closed position it presents a very small area that is affected by the fluid pressure acted upon in the inlet channel 12 to generate a force which the spring 21 counteracts got to. Thus, the spring 21 can be relatively weak, and the electromagnet 17 does not need to be particularly strong be to overcome the force exerted by the spring 21, even if in the inlet duct 12 a very low one There is fluid pressure. When the locking piece 14 is in the open position, the ball 16 is pressure balanced, since the conical recess 20 does not form a seal with the ball 16

Wenn dem Kanal 26 Druckfluid zugeführt wird, wird die Kugel 16 in der Schließstellung des Verschlußstücks 14 in Richtung zum Einlaßkanal 12 gedrückt und um zu verhindern, daß die Kugel 16 als Verschlußelement wirkt, weist der Einlaßkanal 12 an seinem Umfang mehrere Nuten auf. In der Offenstellung des Verschlußstücks 14 ist die Kugel 16 wieder druckabgeglichen.When pressurized fluid is supplied to the channel 26, the ball 16 is in the closed position of the closure piece 14 pressed in the direction of the inlet channel 12 and to prevent the ball 16 as a closure element acts, the inlet channel 12 has a plurality of grooves on its circumference. In the open position of the breechblock 14, the ball 16 is pressure balanced again.

Bei dem Ausführungsbeispiel nach F i g. 2 ist eine Feder 30 mit Kegelstumpfform, deren größeres Ende an der Wicklung 22 anliegt vorgesehen. Der Flansch 31 des Verschlußstücks verläuft schräg nach außen zum ringförmigen Polstück 19. Dadurch hat das ringförmige Polstück 19 ungefähr die gleiche Länge wie das zentrale Polstück 18.In the embodiment according to FIG. 2 is a spring 30 with a frustoconical shape, the larger end of which is at the winding 22 is provided. The flange 31 of the closure piece extends obliquely outwards to the annular Pole piece 19. As a result, the annular pole piece 19 has approximately the same length as the central one Pole piece 18.

Nach Fig.2 hat das ringförmige Polstück 19 einen Längseinschnitt, durch den bei geöffnetem Ventil Fluid zu einem um die Basis des Elektromagneten gebildeten Umfangskanal strömen kann. Aus diesem Kanal strömt das Fluid dann in den Kanal 28.According to Figure 2, the annular pole piece 19 has a Longitudinal incision through which fluid is formed around the base of the electromagnet when the valve is open Circumferential channel can flow. The fluid then flows from this channel into the channel 28.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 2 is large, which not only creates problems during installation, claims: it also makes production more expensive. The force to be exerted by the spring can reduce

1. Solenoid-operated fluid control valve to be changed when the fluid pressure in the bore

s applied cross-sectional area of the valve member

- is reduced with a non-magnetic cup-shaped. At the same time, the force to be generated by the electromagnetic valve housing (10), which has a force to be generated in its wall, has the cnt inlet channel (12, 13) and the valve designed accordingly responds more quickly.
tilsitzfläche is surrounded. The invention is based on the object of an elec-

- with spring-loaded vertically magnetically actuated fluid control valve in the closing direction of the initially to improve the final piece (14) and the type mentioned so that a single

- With an electrical fan structure acting in the opening direction and thus inexpensive manufacture solenoids (17) at the open end of the valve housing and a good response can be achieved (lü), nen.

15 To solve this problem, the main

characterized by the stated features. The subclaims

contain useful further training.

- That the closure piece (14) made of magnetic The fluid control valve according to the invention has thanks Material a special design of the closure piece with an outer flange (15) henes piece of pipe is one end of which has good response. By the little closed Valve sealing on the seat weight of the closure piece results in a high surface area, working speed The overall construction has ci-

- That the electromagnet (17) one to the other NEN simple structure, the assembly is quick Pass through the end of the closure piece (14) adjacent and it becomes a central one in this way Pole piece (18) and a production concentrated therewith achieved

In the drawings are exemplary embodiments of the

shown near the flange (15) of the closure piece (14) control valve according to the invention,
extends, has, and The F i g. 1 and 2 show sectional side views.

- That a supported on the central pole piece Po- According to Fig. 1, the valve comprises a cup-shaped sitionierelement (16) is provided on the valve housing 10 with a one-piece design Closure piece (14) via its central open pin part 11. This has a screw thread, tion is slidably guided, but before so that the valve housing 10 in a fastening front Inlet channel (12, 13) ends in the direction can be secured.

In the base wall of the valve housing 10 is an inlet

2. Valve according to claim 1, characterized marked 35 laßbohrung 12, which is connected via an inlet channel net, 13 with an annular space, which extends around the pin part of the valve in the fastening device.

- That is formed in the end face of the central pole piece.

(18) a recess (20) is formed and in the cup-shaped valve housing 10, which consists of

- That the positioning element is a ball (16), there is 40 non-magnetic material, is a merit through this recess (20) centered, the end piece 14 is positioned, which is essentially tubular in turn, the closure piece (14) is centered. is shaped and has a peripheral flange 15. That

The locking piece consists of a magnetizable work piece

3. Valve according to claim 2, characterized in that its end face is on that of the base wall net that the wall of the valve housing (10) in the 45 of the cup-shaped valve housing 10 formed seat area the channel mouth (12) provided with grooves surface can be brought into abutment to form a fluid seal, so that the channel mouth (12) does not go through the device with this. The valve housing can be made of plastic Ball (16) can be closed. exist.

4. Valve according to one of claims 1 to 3, marked in the bore formed in the closure piece characterized by flow channels (29) in the circumferential 50 a positioning element arranged in the execution flange (15). example has the shape of a ball 16.

In the open end of the cup-shaped valve housing

10, an electromagnet 17 is arranged, which has a central pole piece 18 and an annular pole piece 19 on -55 has, which are made in one piece with one another. the

The invention relates to an electromagnetically actuated end face of the central pole piece 18 having a conite Fluid control valve with a non-magnetic, see recess 20, which is a bearing surface for the cup-shaped Valve housing which forms gel 16 in its wall.

Around the central pole piece 18 is a NEN inlet channel, which is arranged by a valve seat surface coil spring 21, which to the flange 15 to surround is, with spring-loaded 60 in the closing direction and the locking piece 14 to the seat surface beauf-locking piece, and hit with one in the opening direction.

Between the other end of the closure end An electromagnet at the open end of the valve piece 14 and the central pole piece 18 is seen housing.

Leeway, and one with this leeway in the essential

Such a solenoid valve shows the DE-OS Chen identical leeway exists between the 36 814.

The design chosen makes the use of 65 flange 15 and the annular pole piece 19.
of two diaphragms required so that one can. The electromagnet 17 has a winding 22, which in

relatively complex construction results.

In addition, there is the annular space between the pole pieces nor that the overall axial length of the valve is arranged relatively ken.

The pole pieces 18, 19 consist of