Pressure control valve and device comprising such a pressure control valve, for open-loop or closed-loop control of the pressure of a pressurized fluid in a pilot pressure chamber

1. A pressure control valve ( 30 ) for open-loop or closed-loop control of a pressure of a compressed fluid in a pilot pressure chamber ( 12 ), comprising

a valve housing ( 50 ) with at least one inlet ( 41 ), which can be fluidically connected to the pilot pressure chamber ( 12 ), and at least one outlet ( 43 ),

a wall section ( 51 ) which is permanently arranged in the pressure control valve ( 30 ) and which

has a passage channel ( 60 ) through which the compressed fluid can flow, and

forms a first valve seat ( 58 ),

a tappet ( 52 ), which is mounted in the valve housing ( 50 ) so as to be movable along a longitudinal axis (L) by means of an actuation device ( 49 ) that can be energized,

a first sealing element ( 54 ), which

forms a second valve seat ( 66 ),

is mounted in the valve housing ( 50 ) so as to be movable along the longitudinal axis (L) and

is biased by means of a first spring ( 56 ) against the actuation direction (B) of the actuation device ( 53 ) into a closure position in which the first sealing element ( 54 ) bears against the first valve seat ( 58 ) and can be moved by the compressed fluid in the actuation direction (B),

a second sealing element ( 64 ), which is secured to the tappet ( 52 ) and, by energizing the actuation device ( 53 ), can be moved by means of the tappet ( 52 ) along the longitudinal axis (L) between a first position, in which the second sealing element ( 64 ) bears against the wall section ( 51 ) and closes the passage channel ( 60 ), and a second position, in which the second sealing element ( 64 ) bears against the second valve seat ( 66 ), the second valve seat ( 66 ) being arranged axially offset to the first valve seat ( 58 ) with respect to the longitudinal axis (L), and

a second spring ( 68 ), which biases the second sealing element ( 64 ) into the first position.

2. The pressure control valve according to claim 1 ,

characterized in that the first sealing element ( 54 ) has a first surface (C 1 ) to which the compressed fluid can be applied and which points away from the wall section ( 51 ), and a second surface (C 2 ) to which the compressed fluid can be applied and which points toward the wall section ( 51 ), the second surface (C 2 ) being larger than the first surface (C 1 ).

3. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the second valve seat ( 66 ) is formed by a tube ( 67 ) arranged in the first sealing element ( 54 ).

4. The pressure control valve ( 30 ) according to claim 3 ,

characterized in that the tube ( 67 ) is connected to the first sealing element ( 54 ) so as to be movable along the longitudinal axis (L).

5. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the passage channel ( 60 ) is formed by an annular gap ( 62 ) between the wall section ( 51 ) and the tappet ( 52 ).

6. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the wall section ( 51 ) has a through-hole ( 73 ) through which the compressed fluid can flow and which cannot be closed by the first sealing element ( 54 ).

7. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the cross-sectional area of the passage channel or of the annular gap is larger than the cross-sectional area of a throttle gap ( 74 ) starting at the second sealing element ( 64 ).

8. The pressure control valve ( 30 ) according to claim 7 ,

characterized in that the cross-sectional area (A 4 ) of the annular gap ( 62 ) is larger than the cross-sectional area (A 1 , A 2 , A 3 )

of the first throttle gap ( 74 1 ) formed between the second sealing element ( 64 ) and the second valve seat ( 66 ), or between the tappet ( 52 ) and the valve seat ( 66 ), or

of the second throttle gap ( 74 2 ) formed between the second sealing element ( 64 ) and the first sealing element, or

of the third throttle gap ( 74 3 ) formed between the second sealing element ( 64 ) and the wall section.

9. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the pressure control valve ( 30 ) is designed as a proportional valve ( 75 ).

10. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the wall section ( 51 ) is designed as a first spring plate ( 53 ) and/or the second sealing element ( 64 ) is designed as a second spring plate ( 72 ).

11. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the second sealing element ( 64 ) is connected to the tappet ( 52 ) by means of a clearance fit.

12. The pressure control valve ( 30 ) according to claim 10

characterized in that the second spring plate ( 72 ) is press-fit on the tappet ( 52 ).

13. The pressure control valve ( 30 ) according to claim 1 ,

characterized in that the actuation device ( 53 ) comprises a magnet ( 44 ) through which the compressed fluid can flow.

14. A device for open-loop and closed-loop control of a pressure in a pilot pressure chamber ( 12 ), comprising

a primary circuit ( 14 ) for a compressed fluid,

a working machine ( 16 ) arranged in the primary circuit ( 14 ) for conveying the compressed fluid in the primary circuit ( 14 ) along a conveying direction,

a hydraulic or pneumatic slider ( 24 ),

a secondary circuit ( 20 ) for the compressed fluid,

which starts at a branch ( 18 ) of the primary circuit ( 14 ), which branch is arranged downstream of the working machine ( 16 ) with respect to the conveying direction, and

which flows back into the primary circuit ( 14 ) at a junction ( 22 ),

a pilot pressure chamber ( 12 ) arranged in the secondary circuit ( 20 ), and

a pressure control valve ( 30 ) according to claim 1 , arranged between the pilot pressure chamber ( 12 ) and the junction ( 22 ) in the secondary circuit ( 20 ), wherein

the slider ( 24 ) is arranged and designed so that the slider ( 24 ) can block or unblock the flow of the compressed fluid in the primary circuit ( 14 ) between the branch ( 18 ) and the junction ( 22 ) depending on the pressure in the pilot pressure chamber ( 12 ).

15. The device according to claim 14 ,

characterized in that the slider ( 24 ) is designed as a proportional slider ( 26 ).

16. The device according to claim 14 ,

characterized in that the actuation device ( 53 ) of the pressure control valve ( 30 ) comprises a magnet ( 44 ), through which the compressed fluid can flow and that the magnet ( 44 ) is fluidically connected to the pilot pressure chamber ( 12 ) or to an external compressed fluid circuit ( 46 ).

17. The device according to claim 14 ,

characterized in that the working machine ( 16 ) is a pump ( 78 ), a compressor ( 80 ) or a vibration damper ( 82 ).