DE102008063933A1 - Electromagnetically operated and hydraulic fast-acting on-off valve i.e. pressure compensated 2/2-way valve, has slide valve extending from anchor area to valve area and connected with anchor and carrying or forming blocking bodies - Google Patents

Abstract

The valve has an anchor (4) moved by electromagnets (6, 7), and a slide valve (1) relocatably mounted on a housing part (17) in an axial direction. The housing part separates an anchor area (A) and a valve area (V) from each other. The slide valve extends from the anchor area to the valve area and connected with the anchor, and carries or forms blocking bodies (16, 16a) arranged in the valve area. A valve seat (13a) is provided with a conical contact surface of the bodies. The seat is provided with a passage opening or passage duct (13b) for connection of a valve entrance and the valve area. An independent claim is also included for a method for mounting a fast-acting on-off valve.

Description

The The present invention relates to an electromagnetically actuated, hydraulic quick-acting valve with an electromagnet, a Valve seat and one of this moving anchor.

State of the art

Pressure relieved solenoid valves are used when larger cross sections are required as a result of higher pressure flow. In normal seat valves, the necessary magnetic force and the switching time is too high. From the DE 38 02 648 is a pressure-relieved solenoid valve is known in which the armature is slidably mounted on a fixed guide pin. The anchor also forms the valve cone as shut-off or sealing element. Since the magnetic material of the armature is soft, both the bearing and the valve seat can not be wear resistant. In addition, tight Radialtole be kept tolerances to ensure the tightness. Furthermore, many dead spaces are present, which makes the vent difficult. In addition, the valve is relatively susceptible to contamination due to the lack of filters at the input and output.

task It is the object of the present invention to be more wear resistant To provide quick-change valve.

These The object is achieved according to the invention that the material of the anchor is not at the same time the shut-off forms. The armature is preferably connected to a slider. The connection can be made by caulking or welding. The slider may preferably be made of a hardened material be formed and is slidably in a housing part one. The slide extends from the valve chamber to the Anchor space, the rooms being sealed by the storage of the slide in the valve housing part are separated.

Of the Slider can with its front even the shut-off form. To the radial tolerances to ensure the tightness compensate the valve seat during assembly to the sealing element adjusted and then z. B. by welding connected to the housing.

Around to balance the radial tolerances to ensure tightness is also possible that the shut-off on the Slider is stored. In this case is a floating storage the shut-off on the slide for self-adjustment to prefer.

Of the Area of the shut-off body, which cooperates with the valve seat or is applied to this is advantageous cone or spherical educated. The valve seat can also be made of a hardened Be made of material.

Of the Dead space around the movable armature is advantageously very small form. The required by the armature movement volume compensation is advantageous through a channel in the slide, the z. B. by an axial central Hole and a cross hole can be formed and from the anchor space to to the valve chamber or with the valve closed to the valve inlet extends.

At the Ventilein- and valve outlet are advantageously arranged filters, the ingress of dirt particles into the valve and a deposit of Prevent dirt from the valve seat.

The Return spring, which together the shut-off with the slider and anchor in the direction of the open position energized, can in the anchor room and even better in the valve room to be ordered. However, it is also possible one each Return spring in the valve chamber and a return spring to arrange in the anchor room. The return spring in the anchor space advantageously has only a small diameter.

The Adjustment of the armature to stroke and residual air gap is advantageous by caulking the anchor with the slider. The size and the weight of the valve according to the invention are small, the valve also consists of few parts and so that it is inexpensive to produce.

following is a possible embodiment of the invention Valve explained in more detail with reference to the figure.

In the valve housing 17 is the slider 1 stored with little play, so that the leakage flow is low at pressure difference in the switched state. With the slider 1 is the magnet armature 4 connected to the 8th caulked or welded.

In the figure are two alternatives for the shut-off 16 respectively. 16a shown. So can the shut-off 16 be stored on the slide, in particular floating. This is the floating shut-off 16 in a frontal recess 1a and is through a circlip 11 held captive in this. The cup-shaped recess 1a is through the flange 10 educated. In this embodiment, first, the valve seat body 13 on the valve body 17 pressed on or at 12 welded.

In the second alternative embodiment, the shut-off body 16a through the front of the slide 1 educated.

In both embodiments, at least one return spring 9 . 9a provided, the valve in the open position when not energized electromagnet 7 float. The return springs can be arranged in the armature space A or in the valve space V, the latter arrangement being preferable. It is of course equally possible both in the armature space A and in the valve space V each have a return spring 9 . 9a provided. In the first embodiment with floating shut-off 16 indicates the flange 10 a radial collar 10a on, on which the return spring 9a supported. In the second alternative embodiment with by the slider 1 formed cone sealing element 16a would need to support the return spring 9a on the slide 1 a not drawn ring, z. As a Seeger ring, are provided.

Valve lift HUB and residual air gap L ₀ are two important setting parameters for each solenoid valve. The stroke can in the valve according to the invention by z. B. appropriate dimensioning of the flange 10 and the valve seat body 13 be specified. As a result of the return spring 9 . 9a is the flange 10 on the housing part 17 , which can also be referred to as a valve body to. When the magnetic force acts, the armature moves 4 with the slider 1 until the sealing element or the shut-off 16 . 16a at the valve seat 13a is applied. This movement corresponds to the armature stroke. For quick shutdown, a residual air gap L ₀ between the armature and housing part 17 be set. This is done with a device in the partially assembled state, in which the pot 5 not yet mounted, the slide with shut-off 16 . 16a pressed onto the valve seat. This is the anchor 4 on the slide 1 applied, with an intermediate layer between anchor 4 and housing part 17 the residual air gap L _{0 is} set. When the parts are all positioned, the anchor becomes 4 with the slider 1 via a corresponding recess in the anchor 4 non-positively and / or positively connected.

The installation of the valve differs for the two alternative embodiments. Thus, the caulking is done in the first embodiment with floating shut-off 16 in the partially assembled state, in which the stroke and residual air gap L _{0 is} set. Before this happens, the valve seat becomes 13 with the valve body 17 connected.

In the second alternative embodiment, in which the slide with its front side the shut-off 16a forms, the assembly is carried out in such a way that the shut-off or the sealing element 16a in the valve seat body 13 is pressed and then the valve seat body 13 with the valve body positively, z. B. by welding, at 12a is connected. Is the valve seat body 13 then the anchor can be mounted 4 with the slider 1 be caulked. Here, a spacer element corresponding to the stroke and residual air gap L ₀ between the armature and valve body for fixing the armature 4 with the slider 1 introduced, which is removed afterwards.

In the normal position, the valve is open, so that the same pressure level prevails at the input HZ, in the valve chamber V and output RZ. Will the coil 7 energized, the armature movement takes place against the return spring 9 . 9a or the slider 1 moves and the sealing element 16 respectively. 16a meets the valve seat body 13 and blocks the connection from input HZ to output RZ.

The inlet pressure acts through the longitudinal bore 2 and transverse bore 3 on the back of the slider 1 in the anchor space A. If equal, the effective diameter of slider 1 and shut-off or sealing element 16 respectively. 16a in the valve seat 13 There is no differential force, which determines the balance of forces, especially when opening the valve. In the first embodiment, the shut-off body 16 also an axial through hole 16b on, so that when the valve is closed, a connec tion from the valve inlet HZ toward the armature space A via the channel 2 . 3 of the slider 1 to equalize pressure. During the armature movement, hydraulic volume is displaced, which is achieved via the longitudinal and transverse bores 2 . 3 can drain away.

The slider 1 has as small a clearance as possible to achieve the smallest possible leakage to the housing part 17 ,

to Achieving the shortest possible switching times is already known when turning on the coil with an excessive Push power to work and then closed Valve over PWM to reduce the current, then subsequently also the turn-off time becomes small.

At the input HZ and output RZ are filters 15 and 16 provided to remove dirt particles from the valve seat 13 keep away.

For high numbers of cycles is the magnetically good conductive material of the housing part 17 not suitable. Here, a hard sliding layer in the bore or a liner made of bearing metal or hardened steel can be used.

1

pusher

1a

Frontal recess of the slide 1

2

longitudinal bore

3

cross hole

4

anchor

5

nonmagnetic pot

6

yoke

7

Kitchen sink

8th

caulking

9

Return spring in the anchor room

9a

Return spring in the valve room

10

flange

10a

collar

11

stop ring

12

weld radial

12a

weld axial

13

Valve seat body

13a

valve seat

13b

Port or channel

14

manifold

15

output filters

16

floating mounted shut-off body with spherical shape

16a

by End of the slide formed shut-off with cone shape

16b

Through Hole

16c

collar

18

Rifle

17

housing part or valve body

A

armature space

RZ

connection to the wheel cylinder

HZ

connection to the master cylinder

L ₀

Residual air gap

V

valve chamber

FROM

Distance between valve housing 17 and anchor 4 which is determined by valve lift HUB and residual air gap L ₀ ;

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3802648 [0002]

Claims (21)

Electromagnetically actuated, hydraulic quick-acting valve with an electromagnet ( 6 . 7 ) and one of this moved anchor ( 4 ) and a valve seat ( 13a ), characterized in that a slide ( 1 ) in a housing part ( 17 ) is mounted displaceably in the axial direction, wherein the housing part ( 17 ) the armature space (A) and the valve space (V) separated from each other, and that the slide ( 1 ) extends from the armature space (A) to the valve space (V) and with the armature ( 4 ) and arranged in the valve chamber (V) shut-off ( 16 . 16a ) carries or forms. Quick-acting valve according to claim 1, characterized in that the shut-off body ( 16 ) floating on the slide ( 1 ), in particular in a frontal recess ( 1a ), in particular floating. Quick-acting valve according to claim 1, characterized in that the shut-off body ( 16a ) through the end face of the slide ( 1 ) is formed. Quick-acting valve according to one of claims 1 to 3, characterized in that the valve seat ( 13a ) has a conical contact surface for the shut-off body, wherein the valve seat ( 13a ), in particular in its center, a passage opening or a passage channel ( 13b ) for connecting the valve inlet (HZ) and the valve chamber (V). Quick-acting valve according to claim 4, characterized in that the shut-off body ( 16a ) a connection channel ( 16b ), in particular in the form of an axial bore, which the passage opening or the passage channel ( 13b ) of the valve seat ( 13 ) with a slider ( 1 ) ( 2 . 3 ), whereby the channel ( 2 . 3 ) in the slide ( 1 ) the connecting channel of the shut-off body ( 16b ) connects to the anchor space (A). Quick-acting valve according to one of the preceding claims, characterized in that the channel ( 2 . 3 ) of the slider ( 1 ) is formed by at least one axial bore and a transverse bore, wherein the channel ( 2 . 3 ) in particular on the front side or in the frontal recess ( 1a ) ends. Quick-acting valve according to one of the preceding claims, characterized in that the quick-acting valve is depressurized 2/2-way valve is. Quick-acting valve according to one of the preceding claims, characterized in that the region of the shut-off body ( 16 . 16a ) connected to the valve seat ( 13 ) cooperates, conical or spherical. Quick-acting valve according to one of the preceding claims, characterized in that the shut-off body ( 16 ) radially and / or axially displaceable on the slide ( 1 ) is stored. Quick-acting valve according to one of the preceding claims, characterized in that in the frontal, in particular pot-shaped, recess ( 1a ) of the slider ( 1 ) enclosed shut-off body ( 16 ) a particular molded circumferential collar ( 16c ), wherein a fuse element ( 11 ), in particular in the form of a securing ring in a groove of the cylindrical wall of the recess ( 1a ), the shut-off body ( 16 ) in the recess ( 1a ) holds. Quick-acting valve according to one of the preceding claims, characterized in that a pot ( 5 ) of nonmagnetic material the armature space (A) of the electromagnet ( 6 . 7 ) separates. Quick-acting valve according to claim 11, characterized in that the magnetic yoke ( 6 ) of the electromagnet with coil ( 7 ) the pot ( 5 ) and for mounting in particular on the pot ( 5 ) can be pushed. Quick-acting valve according to one of the preceding claims, characterized in that a return spring arranged in the valve chamber (V) ( 9a ) the slider ( 1 ) is subjected to force in the direction of the open valve position. Quick-acting valve according to claim 13, characterized in that the return spring ( 9a ) with its one end to a valve seat body ( 13 ) or a housing part and with its other end on the slider ( 1 ), in particular one on the slide ( 1 ) arranged or molded collar ( 10a ) and the shut-off body ( 16 ) surrounds. Quick-acting valve according to one of the preceding claims, characterized in that a return spring ( 9 ) is arranged in the armature space (A) and with its one end to a valve housing part ( 17 ) and with its other end on the slider ( 1 ), in particular a arranged on the slider or molded collar or the anchor ( 4 ) is supported. Quick-acting valve according to one of the preceding claims, characterized in that at the valve inlet (HZ) and / or at the valve outlet (RZ) a filter ( 15 . 16 ) is arranged. Quick-acting valve according to one of the preceding claims, characterized in that the valve for closing with an increased flow and for holding the valve in the closed Stel ment with a lower holding current, preferably with PWM, is energized. Quick-acting valve according to one of the preceding claims, characterized in that the armature ( 4 ) by clamping, welding, screwing or by means of a safety pin with the slider ( 1 ) connected is. Quick-acting valve according to one of the preceding claims, characterized in that the housing part ( 17 ) a sliding layer for the storage of the slide ( 1 ) or that in the housing part ( 17 ) a bushing ( 18 ) of bearing metal or hardened steel for supporting the slide ( 1 ) is arranged. Method for mounting a quick-acting valve according to one of the preceding claims, characterized in that the radially displaceably mounted valve seat ( 13 ) through the shut-off body ( 16a ) is brought radially into position or adjusted, after which then the valve seat ( 13 ), in particular connected to the valve housing, is. Method for mounting a quick-acting valve according to one of the preceding claims, characterized in that for generating the necessary residual air gap (L ₀ ) between the housing part ( 17 ) and anchors ( 4 ) first the slide ( 1 ) with the shut-off body ( 16 . 16a ) against the valve seat ( 13a ) is pressed, where after then the anchor ( 4 ) on the slide ( 1 ) is pushed and by means of a spacer means of the residual air gap (L ₀ ) is set and in this position of the parts to each other the armature ( 4 ) with the slider ( 1 ), in particular on a special prepared by drilling or puncture site, positively and / or non-positively connected to each other.