Damping system for a hydraulic system

Abstract

The invention relates to a damping system for a hydraulic system, having a hydraulic valve to be damped, which has at least one first coupling configured as a control coupling, a second coupling configured as a coupling for a high-pressure side and a third coupling configured as a coupling for a low-pressure side, and a valve slide, and a damping chamber having at least one side with a volume, on which a movable piston acts, and wherein the valve slide of the hydraulic valve is connected to the piston of the damping chamber via a mechanical connection in such a way that a movement of the valve slide also produces a movement of the piston. In order to achieve a desired flexible damping of the hydraulic system, a damping control device should be provided, which connects the volume of the at least one side of the damping chamber to a further volume, wherein the behavior of the damping chamber in terms of the reaction time of the hydraulic valve and the damping characteristic of the hydraulic valve can be changed purposefully during the operation of the hydraulic system by means of the damping control device.

Description

TECHNICAL FIELD

[0001] The invention relates to a damping system for a hydraulic system, having a hydraulic valve to be damped, which has at least one first connection configured as a control connection, a second connection configured as a connection for a high-pressure side and a third connection configured as a connection for a low-pressure side, and a valve spool, and a damping chamber having at least one side with a volume, to which a piston is applied, and wherein the valve spool of the hydraulic valve is connected to the piston of the damping chamber via a mechanical connection in such a way that a movement of the piston is also produced by a movement of the valve spool. BACKGROUND

[0002] Damping is desirable in this regard in order to counteract "build-up" in the case of smaller oscillations. However, damping should not occur in the case of rapid strong changes, since such changes are usually desired and are intended. With the use of a damping chamber, oscillations / disturbances of the force reaching one of the three connections, for example the third connection, are counteracted. SUMMARY

[0003] The task of the invention is to avoid the aforementioned disadvantages and to specify a damping system with which a desired flexible damping of a hydraulic system can be achieved.

[0004] The task is solved in a damping system in this way, in that a damping actuating device is provided, which connects the volume of one side of the damping chamber to another volume, wherein the behavior of the damping chamber in terms of the reaction time of the hydraulic valve and the damping characteristic of the hydraulic valve can be purposefully changed during the operation of the hydraulic system by means of the damping actuating device. In this way, a damping of the hydraulic system can be achieved which is controlled independently of the operating state. In this regard, the behavior of the damping chamber can be actively controlled by means of the damping actuating device. By means of the damping actuating device, the reaction time and the damping characteristic can be adjusted in order to counteract disturbances from the outside.

[0005] According to the invention, the damping chamber can have a second side, and this second side of the damping chamber can preferably have a volume. The damping chamber then has a volume on the rod side and an oppositely arranged volume. According to the invention, the two volumes can be connected to one another via a non-return valve.

[0006] According to the invention, a hydraulic resistance can be provided, which connects the volume of one side of the damping chamber to another volume. By means of the size of the hydraulic resistance, the damping behavior for the dynamic use of the valve is determined, wherein the hydraulic resistance also influences the response time of the valve.

[0007] Preferably, the damping actuating device can be arranged parallel to the hydraulic resistance.

[0008] According to the application, not only the hydraulic resistance but also the damping control device can connect the volume of one side of the damping chamber to a uniform further volume. Thereby, the structural outlay is significantly reduced compared to a connection to different volumes.

[0009] In the case of different volumes, the hydraulic resistance can connect the volume at one side of the damping chamber to a volume which is different in size compared to the volume which the damping control device connects at one side of the damping chamber.

[0010] Here, the volume which the hydraulic resistance connects at one side of the damping chamber and the volume which the damping control device connects at one side of the damping chamber can be connected to each other by means of the hydraulic resistance and the damping device.

[0011] Preferably, the hydraulic valve can be a proportional valve. Alternatively, but the hydraulic valve can also be a non-proportional valve.

[0012] In a preferred embodiment of the application, the damping control device can comprise an additionally actively controllable hydraulic resistance, preferably in the form of an additionally actively controllable hydraulic valve.

[0013] Here, a hydraulic control device and / or an electrical control device can be provided for the additionally actively controllable hydraulic resistance.

[0014] Preferably, the control device of the additionally actively controllable hydraulic resistance can be coupled to the first coupling part or to the second coupling part or to the third coupling part of the hydraulic valve in such a way that it is controlled via the pressure at the first coupling part or via the pressure at the second coupling part or via the pressure at the third coupling part of the hydraulic valve.

[0015] In a preferred embodiment of the application, the damping control device can comprise a hydraulic valve, which is pressure-controlled or pressure-difference-controlled.

[0016] According to the application, the hydraulic valve can be configured as a hydraulic pressure-limiting valve.

[0017] Advantageously, a non-return valve can be provided parallel to the hydraulic resistance, which opens in the direction to the volume of at least one side of the damping chamber.

[0018] According to the application, the hydraulic resistance can be connected to a coupling part of the hydraulic valve, preferably to the first coupling part configured as a control coupling part or to the second coupling part configured as a coupling part for the high-pressure side or to the third coupling part configured as a coupling part for the low-pressure side. But it can also be connected to other coupling parts of the hydraulic valve.

[0019] Preferably, the damping control device can be connected to the second coupling part configured as a coupling part for the high-pressure side of the hydraulic valve or to the third coupling part configured as a coupling part for the low-pressure side of the hydraulic valve.

[0020] The application furthermore relates to a hydraulic system having at least one hydraulic valve to be damped, wherein each hydraulic valve to be damped has at least one first coupling configured as a control coupling, a second coupling configured as a coupling for a high-pressure side and a third coupling configured as a coupling for a low-pressure side, and a valve slide.

[0021] For a desired flexible damping of the hydraulic system, for the reasons set out at the outset, at least one damping system according to the application is provided, which is associated with the hydraulic valve to be damped.

[0022] Advantageously, in at least one hydraulic valve to be damped, at least two damping systems according to the application, which are preferably each damped only in one direction, can be provided, such that the two damping systems are arranged at least dampedly in opposite directions.

[0023] According to the application, at least one of the at least two damping systems damped at least in opposite directions can be provided on one side of the hydraulic valve to be damped, and at least one other of the at least two damping systems damped at least in opposite directions can be provided on the other side of the hydraulic valve to be damped.

[0024] Here, the damping system provided on one side of the hydraulic valve to be damped and the damping system provided on the other side of the hydraulic valve to be damped are configured differently and / or have different damping characteristics.

[0025] Furthermore, in at least one hydraulic valve to be damped, only one damping system can be provided and configured as a damping system damped in both directions. BRIEF DESCRIPTION OF DRAWINGS

[0026] Embodiments of the application presented in the drawings are explained below. The different embodiments of the damping system according to the application are illustrated. In all figures, consistent reference signs are used for identical or identical types of components.

[0027] Figures 1 to 94 Different embodiments of the damping system of the hydraulic system according to the application are shown. DETAILED DESCRIPTION

[0028] In the figures, a damping system 1 for a hydraulic system not presented in more detail in the figures is shown, which has at least one hydraulic valve 5 to be damped. For this purpose, the damping system 1 comprises at least one damping chamber 2 having a piston 15 and at least one volume 11, wherein the hydraulic valve 5 is connected to the damping chamber 2 via a mechanical connection 6.

[0029] In most figures, this mechanical connection 6 is configured as a separate component, in contrast to which the mechanical connection 6 in Figures 22 to 44 andFigures 91 to 94 In the case of the damping chambers 2 in Figures 1 to 4, the partial areas of the piston 15 through which the damping chambers 2 are respectively formed are formed in such a way that the damping chamber 2 then has only one volume 11 into which the mechanical connection 6 penetrates more or less depending on the position of the hydraulic valve 5 and the volume 11 is thus more or less reduced.

[0030] In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figures 1 to 11 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figures 45 to 90 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figures 12 to 44 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15.

[0031] Furthermore, a damping actuating device 13 is provided, which connects the volume 11 of at least one side 3 of the damping chamber 2 to a further volume, which is not represented in the figures, wherein the behaviour of the damping chamber 2 in terms of the reaction time of the hydraulic valve 5 and the damping characteristic of the hydraulic valve 5 can be purposefully changed during the operation of the hydraulic system by means of the damping actuating device 13. A particularly simple embodiment of the invention is shown for example in Figure 1. Figure 4

[0032] In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figures 1 to 30 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figures 87 to 93 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15.

[0033] In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figures 31 to 86 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15. Figure 94 In Figures 1 to 4, the damping chambers 2 are respectively formed by the piston 15.

[0034] In parallel to the damping actuating device 13, a hydraulic resistance 12 (see Figure 1), a check valve 14 (see Figure 2) or a parallel connection of a hydraulic resistance 12 and a check valve 14 (see Figure 3) can for example be provided, wherein they are respectively connected to the same volume as the damping actuating device 13. Figure 3 Figure 2 Figure 1 Alternative variants are shown in which the hydraulic resistance 12 and / or the check valve 14 are not connected to the same volume as the damping actuating device 13. Figures 5 to 7 Alternative variants are shown in which the hydraulic resistance 12 and / or the check valve 14 are not connected to the same volume as the damping actuating device 13.

[0035] In Figure 4, an alternative embodiment is presented in which the damping actuating device 13 is not connected to the volume 11, but to the volume 10 on the rod side. Figures 8 to 14 In Figure 4, an alternative embodiment is presented in which the damping actuating device 13 is not connected to the volume 11, but to the volume 10 on the rod side.

[0036] Figures 15 to 21 ​​​Different variants are shown, in which not only the volume 11 but also the rod-side volume 10 is connected with the damping device 13, respectively. In the shown variants, the two present damping devices 13 on both sides are identically configured, respectively. However, different damping devices 13 can also be present.

[0037] In Figures 22 to 44 , an embodiment of the invention is shown, in which the mechanical connection 6 between the hydraulic valve 5 and the damping chamber 2 is not configured as a separate component, but is formed by a partial region of the piston 15 of the damping chamber 2. Here, the damping chamber 2 then has only one volume 11, into which the mechanical connection 6 penetrates more or less depending on the position of the hydraulic valve 5 and thus the volume 11 is reduced more or less.

[0038] In Figure 87 , an embodiment is shown, in which a non-return valve 14 is provided parallel to the damping chamber 2, which connects the rod-side volume 10 and the opposite volume 11 of the damping chamber 2 to each other and which leads in the direction from the rod-side volume 10 to the opposite volume 11.

[0039] In Figures 88 to 90 , an embodiment is shown, in which the damping system 1 furthermore comprises a hydraulic resistance 12, which connects the volumes 10 and 11 of the damping chamber 2 to each other.

[0040] The hydraulic resistance 12 can be configured in the form of a baffle, as is shown, for example, in Figures 88 to 94 , respectively.

[0041] In the embodiments shown in Figure 89 , Figure 91 and Figure 94 , the damping control 13 comprises a pre-controlled through valve. It can also be formed only by this. In this regard, the damping control 13 comprises an additionally actively controllable hydraulic resistance, which can be controlled by means of a hydraulic control device and / or an electrical control device.

[0042] In the embodiments presented in Figure 93 , the damping control 13, on the contrary, comprises a directly controlled through valve. It can also be formed only by this.

[0043] In the embodiments shown in Figure 90 and Figure 92 , the damping control 13 comprises a hydraulic pressure-limiting valve, respectively. It can also be formed only by this.

[0044] In Figure 94 , a further embodiment of the invention is shown, in which the hydraulic valve 5 to be damped is provided with two damping systems 1 according to the invention. Here, the two damping systems 1 are configured dampedly in opposite directions and are arranged on both sides of the hydraulic valve 5.

[0045] In Figures 59 to 65 Further embodiments of the application are shown in In each case, the damping system 1 is configured as a damping system 1 which damps in both directions, comprising two damping actuators 13 each of which is connected to one of the two volumes 10 and 11 of the damping chamber 2 and damps this volume in the respective one direction.

Claims

1. A damping system (1) for a hydraulic system, having a hydraulic valve (5) to be damped, which has at least a first coupling (7) configured as a control coupling, a second coupling (8) configured as a coupling for a high-pressure side and a third coupling (9) configured as a coupling for a low-pressure side, and a valve slide (16), and a damping chamber (2) having at least one side (4) and a movable piston (15), wherein The at least one side (4) has a volume (11), on which the piston (15) acts, and wherein the valve slide (16) of the hydraulic valve (5) is connected to the piston (15) of the damping chamber (2) in such a way that a movement of the valve slide (16) also produces a movement of the piston (15), or the valve slide (16) of the hydraulic valve (5) forms the piston (15) of the damping chamber (2), characterized in that a damping control device (13) is provided, which connects the volume (11) of at least one side (4) of the damping chamber (2) to another volume, wherein the behavior of the damping chamber (2) in terms of the reaction time of the hydraulic valve (5) and the damping behavior of the hydraulic valve (5) can be changed selectively by means of the damping control device (13) during operation of the hydraulic system, wherein the damping control device (13) comprises a hydraulic valve, which is pressure-controlled or pressure-difference-controlled, wherein the hydraulic valve of the damping control device (13) is configured as a hydraulic pressure-limiting valve.

2. Damping system (1) according to claim 1, characterized in that The damping chamber (2) has a second side (3), and the second side (3) of the damping chamber (2) has a volume (10).

3. Damping system (1) according to claim 1, characterized in that A hydraulic resistance (12) is provided, which connects the volume (10 or 11) of one side (3 or 4) of the damping chamber (2) to another volume.

4. Damping system (1) according to claim 3, characterized in that The damping control device (13) is arranged parallel to the hydraulic resistance (12).

5. Damping system (1) according to claim 4, characterized in that Not only the hydraulic resistance (12) but also the damping control device (13) each connect the volume (10 or 11) of one side (3 or 4) of the damping chamber (2) to one and the same other volume.

6. Damping system (1) according to claim 3, characterized in that The hydraulic resistance (12) connects the volume in which one side (3 or 4) of the damping chamber (2) is connected to a volume which is different in size compared to the volume in which the damping control device (13) connects the volume (11 or 10) of the other side (4 or 3) of the damping chamber (2).

7. The damping system (1) according to claim 3, characterized in that The volume in which one side (3 or 4) of the damping chamber (2) is connected by the hydraulic resistance (12) and the volume in which the other side (4 or 3) of the damping chamber (2) is connected by the damping control device (13) are connected to one another by the hydraulic resistance (12) and the damping control device (13).

8. The damping system (1) according to claim 1, characterized in that The valve slide (16) of the hydraulic valve (5) is connected to the piston (15) of the damping chamber (2) via a mechanical connection (6).

9. Damping system (1 ) according to any one of claims 1 to 8, characterized in that The hydraulic valve (5) is a proportional valve.

10. Damping system (1 ) according to any one of claims 1 to 8, characterized in that The damping control device (13) comprises an additional hydraulic resistance which can be actively controlled.

11. Damping system (1) according to claim 10, characterized in that The hydraulic resistance is in the form of an additional hydraulic valve which can be actively controlled.

12. Damping system (1) according to claim 10, characterized in that A hydraulic control device and / or an electrical control device is provided for the additional hydraulic resistance.

13. Damping system (1) according to claim 12, characterized in that The control device of the additional hydraulic resistance which can be actively controlled is coupled to the coupling of the hydraulic valve (5) in such a way that it is controlled via the pressure at the first coupling, or the pressure at the second coupling, or the pressure at the third coupling of the hydraulic valve (5).

14. The damping system (1) according to claim 12, characterized in that The actuating device of the additional hydraulic impedance that can be actively controlled is coupled to the first coupling part or to the second coupling part or to the third coupling part of the hydraulic valve (5) in such a way that it is actuated via the pressure at the first coupling part or via the pressure at the second coupling part or via the pressure at the third coupling part of the hydraulic valve (5).

15. Damping system (1 ) according to any one of claims 3 to 7, characterized in that A non-return valve (14) is arranged parallel to the hydraulic impedance (12), the throughflow direction of which leads to the volume (11) of at least one side (4) of the damping chamber (2).

16. Damping system (1 ) according to any one of claims 4 to 7, characterized in that The hydraulic impedance (12) is connected to the first coupling part (7) of the hydraulic valve (5) which is configured as a control coupling part or to the second coupling part (8) of the hydraulic valve (5) which is configured as a coupling part for the high-pressure side or to the third coupling part (9) of the hydraulic valve (5) which is configured as a coupling part for the low-pressure side.

17. Damping system (1 ) according to any one of claims 1 to 8, characterized in that The damping actuating device (13) is connected to the second coupling part (8) of the hydraulic valve (5) which is configured as a coupling part for the high-pressure side or to the third coupling part (9) of the hydraulic valve (5) which is configured as a coupling part for the low-pressure side.

18. Hydraulic system with at least one hydraulic valve (5) to be damped, wherein Each hydraulic valve (5) to be damped has at least one first coupling part (7) configured as a control coupling part, a second coupling part (8) configured as a coupling part for the high-pressure side and a third coupling part (9) configured as a coupling part for the low-pressure side, and a valve spool (16), characterized in that at least one damping system (1) according to any one of claims 1 to 17 is provided, which is associated with the hydraulic valve (5) to be damped in such a way that it damps the hydraulic valve (5).

19. The hydraulic system of claim 18, wherein, In at least one hydraulic valve (5) to be damped, at least two damping systems (1) according to any one of claims 1 to 17 are provided which each damp only in one direction, in such a way that the two damping systems (1) are arranged at least in opposite directions for damping.

20. The hydraulic system of claim 19, wherein, On the one hand, at least one of the at least two damping systems (1) which damp at least in opposite directions is arranged on one side of the hydraulic valve (5) to be damped, and on the other hand, at least one other of the at least two damping systems (1) which damp at least in opposite directions is arranged on the other side of the hydraulic valve (5) to be damped.

21. The hydraulic system of claim 20, wherein, The damping system (1) arranged on one side of the hydraulic valve (5) to be damped on the one hand and the damping system (1) arranged on the other side of the hydraulic valve (5) to be damped on the other hand are configured differently and / or have different damping properties.

22. The hydraulic system of any one of claims 18-21, wherein, In at least one hydraulic valve (5) to be damped, only one damping system (1) is provided, and the damping system (1) is configured to damp in both directions.

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