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Pressure medium supply for hydrostatic drives

A pressure medium and supply device technology, which is applied in the direction of fluid pressure actuators, transmission device control, fluid pressure actuator system components, etc., can solve problems such as descending functions and negative effects, so as to improve efficiency, simplify costs, and avoid Cavitation effect

Inactive Publication Date: 2019-03-22
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this has the disadvantage that the control pressure drops when a large amount of pressure medium has to be supplied to the hydraulic motor and has a negative effect on other functions

Method used

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  • Pressure medium supply for hydrostatic drives
  • Pressure medium supply for hydrostatic drives
  • Pressure medium supply for hydrostatic drives

Examples

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Embodiment Construction

[0047] According to the pressure medium supply device 1 for a hydrostatic drive according to the first embodiment of the invention, in figure 1 The circuit diagram shown in contains a hydraulic pump 2 adjustable in its displacement volume, which is fluidically connected to a hydraulic motor 4 in an open circuit and drives it.

[0048] Via the supply connection M, the hydraulic motor 4 can be supplied with pressure medium from the pressure accumulator 6 in order to avoid cavitation. The supply connection M is connected in parallel to the hydraulic motor 4 and has two shut-off valves 8 , which each release the pressure medium flow from the pressure accumulator 6 to the hydraulic motor 4 . The two shut-off valves 8 and the supply connection M are integrated in the hydraulic motor 4 or in its housing.

[0049] A multi-way slide valve 10 designed here as a 4 / 3 bypass valve is provided for controlling the drive direction of the hydraulic motor 4 . One switch-on position of the mul...

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PUM

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Abstract

The invention discloses a pressure medium supplying device for a hydrostatic driving device. The pressure medium supplying device comprises a hydraulic pump, a hydraulic motor and a supplying connector. The hydraulic motor is driven by fluid of the hydraulic pump. Through the supplying connector, a pressure storage can supply pressure medium for the hydraulic motor to avoid holes. According to the invention, a plurality of slide valves are arranged to control the driving direction of the hydraulic motor. Besides, the pressure storage is arranged between a valve and the supplying connector, wherein the valve can be closed by pressure of the pressure storage.

Description

technical field [0001] The invention relates to a pressure medium supply device for a hydrostatic drive. Background technique [0002] In known hydrostatic drives, in particular pivot drives for construction machines, the hydraulic motor of the pivot drive can be supplied with pressure medium via a supply connection to avoid cavitation, said The supply connection is usually connected to the line towards the pressure medium groove, supplying the pressure medium with approx. 2 to 5 bar. However, this is not sufficient in certain cases and can lead to undesired noise generation, especially for hydraulic motors which are designed in the form of radial pistons. [0003] Furthermore, in order to increase the efficiency of the hydrostatic drive, it is desirable to reduce the pressure in the line leading to the pressure medium groove. However, this can lead to an insufficient supply of pressure medium to the hydraulic motor and thus to cavitation under certain conditions. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/08F15B1/02
CPCF16H61/4096F15B21/047F15B2211/20546F15B2211/613F15B2211/625F15B2211/7058F15B2211/715F15B2211/8609F16H61/4148
Inventor I·爱德华O·格拉夫
Owner ROBERT BOSCH GMBH
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