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Active hydraulic damper and hydraulic actuator

A hydraulic damper and hydraulic actuation technology, applied in the direction of liquid shock absorbers, shock absorbers, shock absorbers, etc., can solve the problems of low limit frequency, insufficient dynamics, complexity, etc., achieve cost advantages and improve dynamics characteristics, effects of improving controllability

Active Publication Date: 2013-05-01
利勃海尔运输系统股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Active aerodynamic dampers are well known, but, due to their lower cut-off frequency of about 1 Hz, do not offer the possibility of high dynamics and thus optimum damping
So far, due to the complexity of technical realization, the technically mature hydraulic active damper is no longer used
In particular, earlier hydraulic actuators were insufficiently dynamic, their structure and maintenance were too complex, and their energy consumption was too high

Method used

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  • Active hydraulic damper and hydraulic actuator
  • Active hydraulic damper and hydraulic actuator
  • Active hydraulic damper and hydraulic actuator

Examples

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Embodiment Construction

[0062] figure 1 An embodiment of the actuator of the invention is shown in which all components of the hydraulic system are arranged at the hydraulic cylinder 1 . The hydraulic cylinder 1 is a double-acting cylinder with a cylinder space 9, a one-way piston rod 8 and a piston 12 movable in the cylinder space, which divides the cylinder space 9 into a first piston space 10 and a second piston space11. By applying a pressure difference between the first piston space 10 and the second piston space 11 , the pistons can move in opposite directions as directed by the pressure difference.

[0063] Furthermore, a position-measuring system 19 is provided, which is integrated in the hydraulic cylinder, wherein a position-measuring track 23 runs in a bore in the piston rod 8 . In this way, the movement of the piston and thus the position of the cylinder-side pivot point 24 relative to the piston-side pivot point 25 can be detected.

[0064] All components of the hydraulic system of th...

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PUM

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Abstract

The damper has an electric motor (2), a hydraulic reservoir (3), pumps (4, 6) and control valves e.g. pressure control valve, arranged at a hydraulic cylinder (1). Piston chambers (10, 11) of the hydraulic cylinder are connected with pumps, where the piston chambers have a separate supply line and discharge line. Pressure in the piston chamber of the hydraulic cylinder is separately controlled by an assigned control valve. The supply line is connected with the pumps, and the discharge line is connected with the control valves.

Description

technical field [0001] The invention relates to a hydraulic actuator, in particular in the form of an active hydraulic damper, for rail vehicles. Background technique [0002] Semi-active dampers with varying damping forces have been widely used especially in the field of passenger cars. An active damper, ie a damper which can generate a force by itself and thus be actively moved, guarantees an improved damping effect compared to semi-active systems. Active aerodynamic dampers are known, but, due to their lower cut-off frequency of about 1 Hz, do not offer the possibility of high dynamics and thus optimum damping. So far, due to the complexity of technical realization, the technically mature hydraulic active damper is no longer used. In particular, earlier hydraulic actuators were not dynamic enough, their construction and maintenance were too complex and their energy consumption was too high. Contents of the invention [0003] It is therefore an object of the present i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/19F16F9/34F16F9/32
CPCB61F5/245F16F9/3207
Inventor 安东·盖勒
Owner 利勃海尔运输系统股份有限公司
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