DEVICE FOR REGULATING PRESSURES OF A FLOW MEDIUM USING A VALVE

Abstract

A device for controlling pressures of a flow medium in a component in which the device is formed at least by the component and at least one valve; the valve has an axially oriented valve axis and is seated, at least in part, in the component and has at least one opening. The opening leads into an annular gap which at least partly surrounds the valve, and the annular gap is formed between the valve and the component. The annular gap is sealed by at least one seal.

Claims

1. A device for controlling pressures of a flow medium in a component, the device comprising: the component; a valve having an axially oriented valve axis that is seated at least in part in the component and has at least one opening, wherein the at least one opening opens into an annular gap which at least partly surrounds the valve; the annular gap is formed between the valve and the component; and at least one seal between the valve and the component that seals the annular gap.

2. The device according to claim 1, wherein the seal is formed from at least one sealing ring and a reinforcement, and at least part of the reinforcement covers the annular gap at least partly in a radial direction oriented transverse to the valve axis.

3. The device according to claim 2, wherein the valve has a valve housing with the at least one opening, the valve housing extends about the valve axis, the annular gap extends about the valve housing concentrically with respect to the valve axis and is formed at least in sections between the valve housing and an inner skirt surface of a through-hole, which is formed at least in sections in the component and extends at least axially over an entire length of the valve.

4. The device according to claim 3, wherein the reinforcement is configured to be rotationally symmetrical about the valve axis and one leg of the reinforcement at least partially radially overlaps the annular gap, and a sealing ring of the seal supported axially by the leg axially closes the annular gap running axially parallel to the valve axis.

5. The device according to claim 4, wherein the reinforcement has a hollow-cylindrical collar which is formed in one piece with the leg and is guided at least radially on a hollow-cylindrical neck oriented axially in a direction of a first channel, formed on the valve about the valve axis and which delimits a first opening of the valve.

6. The device according to claim 5, wherein the neck surrounds the first opening of the valve, and the first channel and the first opening are connected to one another so as to be permeable to a flow medium.

7. The device according to claim 5, wherein the annular gap is connected to a second channel so as to be permeable to a flow medium.

8. The device according to claim 1, wherein the annular gap is closed in one axial direction by the seal and in an other opposite axial direction by a seat of the valve in the component.

9. A valve for a device for controlling pressures of a flow medium in a component, the valve comprising: a valve housing with first and second openings, the first opening is formed on a front end of the valve housing and is perpendicular to a valve axis, and the second opening is formed in the valve housing oriented transverse to the valve axis; and at least piston guided in an axially moveable manner in the valve housing.

10. The valve according to claim 9, further comprising a seal placed on or attached to the valve housing.

11. A device for controlling pressures of a flow medium in a component the device comprising: the component; a valve having an axially oriented valve axis that is seated at least in part in the component and has a first opening and a second opening, wherein the first opening opens into an annular gap formed between the valve and the component that at least partly surrounds the valve; and at least one seal between the valve and the component that seals the annular gap at one axial end of the valve.

12. The device according to claim 11, wherein the seal is formed from at least one sealing ring and a reinforcement, and at least part of the reinforcement covers the annular gap at least partly in a radial direction oriented transverse to the valve axis.

13. The device according to claim 12, wherein the valve has a valve housing with the first opening defined radially therethrough, the valve housing extends about the valve axis, the annular gap extends about the valve housing concentrically with respect to the valve axis and is formed at least in sections between the valve housing and an inner skirt surface of a through-hole, which is formed at least in sections in the component and extends at least axially over an entire length of the valve.

14. The device according to claim 13, wherein the reinforcement is configured to be rotationally symmetrical about the valve axis and one leg of the reinforcement at least partially radially overlaps the annular gap, and a sealing ring of the seal supported axially by the leg axially closes the annular gap running axially parallel to the valve axis.

15. The device according to claim 14, wherein the reinforcement has a hollow-cylindrical collar which is formed in one piece with the leg and is guided at least radially on a hollow-cylindrical neck oriented axially in a direction of a first channel, formed on the valve about the valve axis and which delimits a first opening of the valve.

16. The device according to claim 15, wherein the neck surrounds the first opening of the valve, and the first channel and the first opening are connected to one another so as to be permeable to a flow medium.

17. The device according to claim 15, wherein the annular gap is connected to a second channel so as to be permeable to a flow medium.

18. The device according to claim 1, wherein the annular gap is closed at a second axial end by a seat of the valve in the component.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the following, the disclosure is explained in more detail with reference to exemplary embodiments. In the figures:

[0017] FIG. 1—shows a device 1 for regulating the pressure of a flow medium in a longitudinal section along the valve axis 2 of a valve 3.

[0018] FIG. 2—a sectioned 3-dimensional view of the device according to FIG. 1.

DETAILED DESCRIPTION

[0019] Referring to FIG. 1, the device 1 is formed from a component 4 only partially shown, the valve 3 and a seal 5. The valve 3 is seated in a through-hole 6 of the component 4. The component 4 is, for example, a transmission housing or a rotating component of a transmission and is made, for example, of an aluminum alloy or alternatively of steel.

[0020] The valve 3 consists of a valve housing 7, a piston 8, a compression spring 9 and a support element 10. The valve axis 2 is axially oriented. Radial means transverse to the valve axis 2. The valve housing 7 has a seat section 11 with which the valve 3 sits centered in the through-hole 6 of the component 4. The piston 8 is guided axially in a guide section 12 of the valve housing 7. The support element 10 is seated firmly in the valve housing 7 at the end of the valve housing 7. The compression spring 9 is axially supported on a piston head 13 of the piston 8 and axially elastically clamped between the piston head 13 and the support element 10. As shown in FIG. 1, the piston 8 is in a closed position and biased against a valve seat 14 by the effect of the compression spring 9. In this closed position, a frontal first opening 15 of the valve housing 7 is closed by means of the piston 8. The first opening 15 is axially oriented with the valve axis 2 in the same way.

[0021] Second openings 16, which lie radially opposite a piston skirt 17 of the piston 8, are formed in the valve housing 7. The second opening 16 is oriented radially towards the valve axis 2, transversely to the axial direction. A first channel 18 and the first opening 15 are in alignment with one another so as to be permeable to a flow medium. The first opening 15 is surrounded by a neck 19 formed on the valve housing 7. The guide section 12 of the valve housing 7 extends axially from the seat section 11 to the neck 19. Depending on the design of the valve 3, a third channel 35 optionally connects to the valve 3 at the end 36.

[0022] An annular gap 21 running about the valve housing 7 and thus about the valve axis 2 is formed radially between the guide section 12 and an inner skirt surface 20 of the through-hole 6. The thickness G of the annular gap 21 results from the difference between the diameters D1 and D2, D1 being the diameter of the through-hole 6 designed as a through bore at the seat of the seat section 11 in the through-hole 6. The through-hole 6 can have other diameters at other points. D2 is the outer diameter of the guide section 12. The second openings 16 open into the annular gap 21. A second channel 22 leads into the annular gap 21. The outer diameter of the seat section 11 and the inner diameter D1 of the through-hole 6 are at least partially the same in the region of the seat section 11 in the nominal dimension, wherein a diameter difference optionally results from a clearance or transition fit or from a press fit between the seat section 11 and the through-hole 6.

[0023] The piston 8 is a hollow-cylindrical component which is designed with a stepped diameter. The first step 23 of the piston 8 is formed between the piston skirt 17 and the piston head 13. The piston head 13 has a smaller diameter than the piston skirt 17, so that an annular channel 24 is formed at the step 23 inside the valve 3. The annular channel 24 is formed between the first opening 15 and the second openings 16.

[0024] The outer diameter D3 of the neck 19 is smaller than the outer diameter D2 of the guide section 12 so that a second step 25 is formed on the valve housing 7. The seal 5 is guided radially on the neck 19 via a reinforcement 27 of the seal 5 and is supported axially on an annular surface 26 of the step 25. The seal 5 also consists of at least one sealing ring 28. The reinforcement 27 and the sealing ring 28 are either firmly connected to one another, for example by vulcanization, or the sealing ring 28 lies axially on the radially oriented leg 29 of the reinforcement 27. The outer diameter D4 of the reinforcement 27 determined by the outer edge of the disc-shaped leg 29 is smaller than or equal to the inner diameter D2 of the through-hole 6 at the point where the valve 2 with the seat section 11 is seated in the through-hole 6. In addition, the outer diameter D4 of the reinforcement 27 is larger than the outer diameter D2 of the guide section 12. This results in the following relationship: D2<D4≤D1. The reinforcement 27 is rigidly radially guided via a collar 33 on the neck 19 and at the same time is rigidly supported with the leg 29 on the annular surface 26 and protrudes radially with the leg 29 over the outer lateral surface 30 of the valve housing 7 and at the same time radially bridges the annular gap 21 at least in part. The collar 33 is designed as a hollow cylinder and is connected to the leg 29 to form the reinforcement 27 as one piece from one material. The sealing ring 28 is squeezed radially in between the collar 33 and an inner skirt surface 31 of the through-hole 6 and is clamped in axial directions between a cover 32 and the leg 29.

[0025] If necessary, the sealing ring 28 also bridges a gap 34 formed between the leg 29 and the inner skirt surface 31. The sealing ring 28 is supported axially in the direction of the annular gap 21 by the leg 29 in such a way that it securely comes to lie against the inner skirt surface 31 and does not become drawn into or does not fall into the annular gap 21, thus losing its sealing effect.

[0026] In FIG. 2, the piston 8 is in an open position. The flow medium symbolized by the arrows is initially in the first channel 18 under pressure in the closed position shown in FIG. 1 against the piston 8. If the pressure exceeds a certain limit value, the piston 8 lifts off the valve seat 14 and is displaced axially in the direction of the support element 10 against the effect of the compression spring 9. The first opening 15 is released. The flow medium passes through the interior of the valve 3 and leaves it via the second openings 16, where it then flows into the annular gap 21 formed between the inner skirt surface 20 and the valve 3 and from there into the second channel 22. The annular gap 21 is sealed (closed off) axially in one direction on the front end of the valve 3 by means of the seal, so that no flow medium can escape between the cover 32 and the housing of the component 4 and is closed off within the component 4 in the other direction by the seat of the seat section 11 of the valve housing 7.

[0027] LIST OF REFERENCE SYMBOLS

[0028] 1 Device

[0029] 2 Valve axis

[0030] 3 Valve

[0031] 4 Component

[0032] 5 Seal

[0033] 6 Through-hole in the component

[0034] 7 Valve housing

[0035] 8 Piston

[0036] 9 Compression spring

[0037] 10 Support element

[0038] 11 Seat section of the valve body

[0039] 12 Guide section of the valve body

[0040] 13 Piston head of the piston

[0041] 14 Valve seat

[0042] 15 First opening

[0043] 16 Second opening

[0044] 17 Piston skirt of the piston

[0045] 18 First channel

[0046] 19 Neck

[0047] 20 Inner skirt surface of the through-hole

[0048] 21 Annular gap

[0049] 22 Second channel

[0050] 23 Step of the piston

[0051] 24 Annular channel

[0052] 25 Step of the valve body

[0053] 26 Annular surface

[0054] 27 Reinforcement of the seal

[0055] 28 Sealing ring of the seal

[0056] 29 Reinforcement legs

[0057] 30 Outer skirt surface of the valve

[0058] 31 Inner skirt surface of the through-hole

[0059] 32 Cover

[0060] 33 Collar of the reinforcement

[0061] 34 Gap

[0062] 35 Third channel

[0063] 36 End of the valve