Valve for flowing a gas medium

Abstract

The utility model relates to a valve for circulating a gaseous medium, comprising a sealing element, a housing, and a channel via which a connected device can be connected to the valve, the sealing element being in the shape of a dish and comprising an annular, flexible sealing lip, the sealing lip can move in a plurality of functional positions, namely a starting position, a filling position and an emptying position. The sealing lip of the sealing element is in contact with the first sealing surface in an initial position in order to close the inlet cross-section, and wherein the sealing element can be moved into a filling position in which the sealing lip is in contact with the first sealing surface in order to close the inlet cross-section. In the filling position, an outlet cross-section between the second sealing surface and the sealing element is closed, and an inlet cross-section between the first sealing surface and the sealing lip and a functional cross-section between the housing and the sealing lip are opened. According to the utility model, the ratio of the area of the cross section of the inflow cross section to the area of the cross section of the functional cross section is between 1: 0.9 and 1: 1.2.

Description

Technical Field

[0001] The utility model relates to a valve for circulating gaseous media. The valve is provided with a sealing element for controlling connected equipment. Background Art

[0002] Such valves are used, for example, to control the flow of gaseous media, in particular compressed air, into or out of an oil pressure vessel. The oil in the oil vessel is used to fill and drain the torque converter, turbine clutch or reducer. It is important that the filling and draining can be done very quickly. This means that the valve must have a relatively large flow cross section for the air.

[0003] The basic structure of such a valve is known. The sealing element of the valve can be moved steplessly from a starting position to a filling position or an emptying position depending on the flow direction of the gas flow. The flow cross section is determined by the adjacent air volume flow.

[0004] The sealing element involved is designed in the form of a disk and comprises an elastic sealing lip which is loaded differently in three functional positions. It has been found that the new requirements for such valves cannot be met by the known designs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to propose a valve which is designed to meet higher requirements.

[0006] According to the invention, the technical problem is solved by a valve for circulating a gaseous medium.

[0007] A valve for the flow of gaseous media is proposed, which has a sealing element, a housing and a channel, through which a connected device can be connected to the valve, wherein the sealing element is designed in a dish shape and comprises an annular, flexible sealing lip, which can be moved to a plurality of functional positions, namely an initial position, a filling position and an emptying position. In the initial position, the sealing lip of the sealing element contacts a first sealing surface, thereby closing an inlet cross section, wherein the sealing element can be moved into a filling position, in which the outlet cross section between the second sealing surface and the sealing element is closed and the inlet cross section between the first sealing surface and the sealing lip and the functional cross section between the housing and the sealing lip are opened.

[0008] According to the invention, the ratio of the cross-sectional area of ​​the inflow cross section to the cross-sectional area of ​​the functional cross section is between 1:0.9 and 1:1.2.

[0009] Alternatively, it can be provided that the ratio of the cross-sectional area of ​​the inflow cross section to the cross-sectional area of ​​the functional cross section is 1:1.

[0010] In both embodiments, by optimizing the forces, in particular the forces generated by the air volume flowing through, the sealing element can be loaded less or deflected less, which is advantageous for the service life of the sealing element.

[0011] In a further embodiment, it can be provided that the cross-sectional area of ​​the inflow cross section and the cross-sectional area of ​​the functional cross section are dimensioned on the basis of the dimensions of the expanded sealing lip.

[0012] The sealing element may consist, for example, of HNBR (hydrogenated nitrile rubber) or another elastomer.

[0013] In a preferred embodiment, the channel can be arranged so that the air volume flows from the center to the channel opening in the open position of the sealing lip. According to the invention, it should be understood that the sealing lip of the sealing element is deflected to such an extent that the direction of the air flow is oriented so that the air flow is directed in the direction of the channel opening.

[0014] A spring can additionally be provided, by means of which the sealing element can be moved in the direction of the emptying position. In one embodiment, the spring force of the spring can be designed such that the sealing element does not come into contact with the second sealing surface in the initial position. As a result, the outlet cross section is always open, so that no residual pressure remains in the connected device.

[0015] In an alternative embodiment, it can be provided that the spring force is smaller, so that both the outlet cross section and the inlet cross section are closed in the initial position by the spring force of the sealing element and only the movement of the sealing element into the outflow position is supported by the spring force of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is described below with reference to the accompanying drawings. In the accompanying drawings:

[0017] Figure 1 shows the initial position of the valve,

[0018] Figure 2 Shows the filling position of the valve,

[0019] Figure 3 Shows valve in drain position. DETAILED DESCRIPTION

[0020] Figures 1 to 3 The valve 1 is shown in three basic functional positions of the valve.

[0021] Figure 1The initial position of the valve 1 is shown with the sealing element 7. The sealing element 7 is a disk-shaped element which comprises a base region and a sealing lip 10. The base region of the sealing element 7 is placed on the bearing surface 17 of the piston 6 or vulcanized thereon, and the sealing lip 10 is designed to be flexible so that it can be moved or bent in three functional positions.

[0022] Figure 1 It shows possible initial positions of the sealing element 7 when there is no pressure difference between the channel (connected to the oil pressure container) and the outflow chamber 14 or when the pressure difference is substantially balanced.

[0023] The spring action of the sealing element 7 brings about a corresponding movement into a starting position which, regardless of the embodiment, ensures that the sealing lip 10 always bears against the first sealing surface 8 , thereby closing the passage from the inflow chamber 12 to the chamber 13 .

[0024] The spring force of the spring 5 can be designed differently. In one embodiment, it is provided that in the initial position a smaller outlet cross section 19 remains open, so that in the initial position complete ventilation of the oil pressure container is ensured via the channel 3 .

[0025] In other embodiments, the spring 5 is omitted or a smaller spring force of the spring 5 is selected so that the sealing element 7 in the initial position rests on the first sealing surface 8 and the second sealing surface 9 and closes the inlet cross section 15 and the functional cross section 19. The spring 5 is then provided only to support the movement of the sealing element 7 in the venting position.

[0026] Figure 2 The valve with the sealing element 7 is shown in the filling position, wherein the channel 19 between the outflow chamber 14 and the chamber 13 is closed. As soon as the control pressure in the chamber 12 is sufficiently high, the sealing element 7 or the sealing lip 10 is brought into the filling position and the sealing lip 10 moves into the open position, wherein the opening cross section 15 is opened. In other words, the control pressure is exceeded. After opening, the air volume flows through the two annular gaps, the inflow cross section 15 and the functional cross section 16.

[0027] An inflow cross section 15 is formed between the first sealing surface 8 and the sealing lip 10, and a functional cross section 16 is formed between the sealing lip 10 and the housing wall. Depending on the pressure and the air volume flowing through, the forces acting on the sealing element 7 and in particular on the sealing lip 10 change, and the elastic deformation of the sealing lip depends on the acting forces.

[0028] What is decisive is that the deflection of the sealing lip is influenced by the inflow cross section 15 and the functional cross section 16. In a preferred embodiment, the sealing lip 10 and the housing 2 are designed such that the inflow cross section 15 and the functional cross section 16 have the same cross-sectional area or flow area at a certain degree of deflection of the sealing lip 10, so that the flow velocity of the air is essentially the same.

[0029] Alternatively, the configuration can be realized in such a way that the flow areas of the inflow cross section 15 and the functional cross section 16 have a ratio of 1:0.9 and 1:1.2 to one another.

[0030] The channel 3 is arranged here so that in the open position of the sealing lip the air volume is located in the center of the channel opening 11. As shown, the sealing lip 10 of the sealing element 7 is deflected to such an extent that the direction of the air flow is oriented so that the air flow is directed in the direction of the channel opening. Ideally, the air flow flows from the center to the channel opening 11.

[0031] In the design, the material of the sealing element, preferably HNBR or another elastomer, is another important factor, especially when oil mist comes into contact with the sealing element 7 by the air flowing through. Sealing elements made of elastic materials, such as rubber mixtures, can swell due to oil or other chemical impurities when they come into contact with oil-containing air. This leads to changes in the size and performance of the sealing element. The inflow cross section 15 and the functional cross section 16 can also be designed based on the swollen sealing element 7 or in particular the sealing lip 10.

[0032] Figure 3 The valve is shown in the drain position in which it is switched when the pressure ratio changes so that the pressure applied to the valve 7 from the chamber 13 is higher than the pressure applied to the valve from the inflow chamber 12. The outlet cross section 18 is opened so that the connected oil pressure container is ventilated via the channel 3.

[0033] Reference numerals list

[0034] 1 Valve

[0035] 2 Housing

[0036] 3 channels

[0037] 5 Spring

[0038] 6 Piston

[0039] 7 Sealing element

[0040] 8 First sealing surface

[0041] 9 Second sealing surface

[0042] 10 Sealing lip

[0043] 11 Channel Entrance

[0044] 12 Inflow cavity

[0045] 13 Chamber

[0046] 14 Outflow cavity

[0047] 15 Inlet cross section

[0048] 16 Functional cross section

[0049] 17 Support surface

[0050] 18 Outlet cross section

Claims

1. A valve (1) for circulating a gaseous medium, comprising a sealing element (7), a housing and a channel (3), wherein a connected device can be connected to the valve (1) via the channel, wherein: The sealing element (7) is designed in a dish shape and comprises an annular, flexible sealing lip (10), which can be moved into a plurality of functional positions, namely an initial position, a filling position and an emptying position, wherein the sealing lip (10) of the sealing element (7) contacts the first sealing surface (8) in the initial position, thereby closing the inlet cross section (15), wherein the sealing element (7) can be moved into a filling position, in which the outlet cross section (18) between the second sealing surface (9) and the sealing element (7) is closed and the inlet cross section (15) between the first sealing surface (8) and the sealing lip (10) and the functional cross section between the housing and the sealing lip (10) are open, characterized in that the ratio of the cross-sectional area of ​​the inflow cross section (15) to the cross-sectional area of ​​the functional cross section (16) is between 1:0.9 and 1:1.

2.

2. The valve (1) according to claim 1, characterized in that The ratio of the cross-sectional area of ​​the inflow cross section ( 15 ) to the cross-sectional area of ​​the functional cross section ( 16 ) is 1:

1.

3. The valve (1) according to claim 1, characterized in that The sealing element (7) is made of a material capable of expansion, which expands when it comes into contact with oil, oil-containing air or impurities.

4. The valve (1) according to claim 3, characterized in that The cross-sectional area of ​​the inflow cross section (15) and the cross-sectional area of ​​the functional cross section (16) are designed based on the dimensions of the expanded sealing lip (10).

5. The valve (1) according to claim 1, characterized in that The sealing element is made of hydrogenated nitrile rubber.

6. The valve (1) according to claim 1, characterized in that The channel (3) is arranged such that, in the open position of the sealing lip (10), an air volume flows from the center to the channel opening (11).

7. The valve (1) according to claim 1, characterized in that A spring (5) is provided, by means of which the movement of the sealing element (7) in the direction of the drain position is supported.

8. The valve (1) according to claim 7, characterized in that The spring force of the spring (5) is designed so that the sealing element (7) does not come into contact with the second sealing surface (9) in an initial position.

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