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Device for compensating for hydraulic effective pressures

A technology of acting pressure and equipment, which is applied in the field of equipment used to balance hydraulic acting pressure, and can solve problems such as system danger, acting pressure difference, and system operator safety risk.

Inactive Publication Date: 2011-10-05
HYDAC SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now when the system transitions again from the state in which the elastic action is blocked to the state in which the hydraulic accumulator is switched on, the difference in acting pressure between the hydraulic accumulator and the actuator results in an uncontrolled force on the actuator. movement, which constitutes a hazard to the system and a safety risk to the system operator

Method used

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  • Device for compensating for hydraulic effective pressures
  • Device for compensating for hydraulic effective pressures
  • Device for compensating for hydraulic effective pressures

Examples

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Embodiment Construction

[0023] figure 1 A mobile working machine in the form of a wheel loader 1 is shown, with a bucket 3 coupled with a lifting cylinder 5. This lifting cylinder forms a hydraulic actuator according to the embodiment of the apparatus of the invention which will be described here. Accordingly, the piston side 7 of the lift cylinder 5 that generates the lifting force for the bucket 3 when the pressure is supplied passes through the figure 1 Hydraulic components not shown in figure 1 Only the hydraulic accumulator 9 shown is connected.

[0024] Figure 2 to 5 A schematic diagram showing the lines of the hydraulic system in different operating states. figure 2 Shows the state when the elastic effect is released. The control block 13 of the work machine (wheel loader 1) and the pressure supply device (not shown) are connected with the piston side 7 and the rod side 15 of the lift cylinder 5 to control the supply to the lift cylinder. The valve structure 11 forming the main part of the hyd...

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Abstract

The invention relates to a device for compensating for hydraulic effective pressures in a hydraulic accumulator (9) and a hydraulic actuator (5) of a hydraulic system (11, 13) having a valve arrangement (27) for blocking a connection between the hydraulic actuator (5) and hydraulic accumulator (9) and having a control valve device (11) performing a pressure compensation when a predetermined difference in effective pressures is exceeded.

Description

Technical field [0001] The present invention relates to a device for balancing hydraulic pressure in hydraulic actuators and hydraulic accumulators of a hydraulic system. Background technique [0002] For example, in a hydraulic system in which a hydraulic actuator is used for a support system or a lifting system, in the prior art, in order to elastically dampen or cushion the components moved by the hydraulic actuator, a hydraulic accumulator is used as An elastic element or cushioning element hydraulically coupled to an actuator. However, in some working situations of this kind of system, an inelastic, rigid functional connection between the actuator and the device manipulated by the actuator is required, for example, when it involves a hydraulically manipulated cantilever that should form a rigid support element. Or this is the case when it comes to working devices that should be controlled vibration-free during use. With regard to these requirements, the connection between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22F15B1/02
CPCF15B2211/8616F15B2211/625E02F9/2207F15B1/021E02F9/2217
Inventor R·洪斯拜恩
Owner HYDAC SYST