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Hydrostatic valve arrangement, hydrostatic transmission gear having valve arrangement, and hydrostatic drive device having transmission gear

A technology of transmission mechanism and valve device, which is applied in the direction of transmission device control, valve device, fluid pressure actuation device, etc., and can solve problems such as component cavitation and damage

Active Publication Date: 2019-03-15
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Associated with this is the risk of cavitation and damage to the hydraulic circuit and connected components

Method used

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  • Hydrostatic valve arrangement, hydrostatic transmission gear having valve arrangement, and hydrostatic drive device having transmission gear
  • Hydrostatic valve arrangement, hydrostatic transmission gear having valve arrangement, and hydrostatic drive device having transmission gear
  • Hydrostatic valve arrangement, hydrostatic transmission gear having valve arrangement, and hydrostatic drive device having transmission gear

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Embodiment Construction

[0029] according to figure 1 , the hydrostatic transmission 1 has a first hydraulic machine 2 and a second hydraulic machine 8 connected to said first hydraulic machine in a closed hydraulic circuit via a first working line 4 and a second working line 6 , In this case, the hydrostatic drive is provided for use in a displacement device or a transport drive as described above. In the exemplary embodiment shown, the first hydraulic machine 2 or hydraulic pump 2 is designed as an axial piston machine of swash plate design with adjustable displacement. It is reversible, that is to say the swashplate whose delivery capacity is determined can be adjusted on either side of a neutral or zero position in which its delivery capacity is zero, so that the first hydromechanical The drive torque of 2, which remains the same, switches the pressure in the working lines 4, 6 and thus reverses the direction of rotation on the second hydraulic machine. To adjust its displacement, the first hydr...

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Abstract

The invention relates to a hydrostatic valve arrangement for flushing a pressure medium from a working line of a hydraulic circuit includes a flushing valve with a first flushing connection for connecting to a first working line and an output connection for connecting to a pressure medium sink. The arrangement also includes a pressure valve arranged in a pressure medium flow path of the arrangement from the output connection in the direction of the pressure medium sink. The pressure valve has a valve body on which a force equilibrium is formed. The force equilibrium includes a pressure equivalent that acts on the valve body in a direction that blocks the pressure medium flow path and an opening pressure that acts in a direction that opens the pressure medium flow path and is dependent on the pressure at the output connection. The arrangement further includes an adjusting device for shifting the force equilibrium.

Description

technical field [0001] The invention relates to a hydrostatic valve arrangement according to the preamble of claim 1 , a hydrostatic transmission with said valve arrangement according to claim 10 and a hydrostatic valve arrangement according to claim 13 . The above-mentioned hydrostatic driving device with the transmission mechanism. Background technique [0002] Reversible hydrostatic drives, in particular displacement or conveying drives, such as eg concrete pump drives, have a closed hydraulic circuit. Especially since the volume of pressure medium conducted in the circuit is comparatively small for the high power densities that can be achieved, this volume heats up considerably and must be recirculated and cooled. During operation, heated pressure medium is fed out via the flushing valve for this purpose. To the same extent that the leakage flow of the circuit is replenished, pressure medium must be replenished into the working line. For example, it can be pushed out ...

Claims

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Application Information

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IPC IPC(8): F15B21/00F15B13/00
CPCF15B13/00F15B21/00F15B7/006F15B7/008F15B2211/20546F15B2211/20561F15B2211/27F15B2211/611F15B2211/613F15B2211/6343F15B2211/7058F15B21/0423F15B21/005F16H61/4104F15B21/042F16K17/003F16K17/10
Inventor M.格普拉格斯S.约克舒
Owner ROBERT BOSCH GMBH
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