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Hydrostatic drive system

A hydrostatic drive and pressure technology, applied in the direction of fluid pressure actuating device, earth mover/shovel, servo motor, etc., can solve the problems of waste of piping, cost, high structure, etc., to reduce the cost of piping and the number of Effect

Active Publication Date: 2017-05-03
LINDE HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this results in a high structural and piping effort, since an additional container connection is required for the branch line and, in order to influence the actuating pressure of the first control valve, the changeover valve is required in addition to the switching valve. to the valve and the flow resistance

Method used

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  • Hydrostatic drive system

Examples

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Embodiment Construction

[0012] The hydrostatic drive system 1 according to the invention has a load-sensing regulated pump 2 with an adjustable delivery volume, the delivery volume of which can be adjusted by means of a demand flow regulator 3 . The pump 2 is connected on the inlet side to a container 4 and feeds into a delivery line 5 . The pump 2 is driven by a drive motor (not shown in detail), for example an internal combustion engine.

[0013] A first control valve 6 is connected to the delivery line 5 by means of a delivery branch line 5a, by means of which first control valve the first consumer 7, which is designed as a hydraulic motor, can be actuated. The hydraulic motor is designed, for example, as a swing gear drive of an excavator. A second control valve 8 , which is provided for acting on a second consumer 9 , is connected to the delivery line 5 by means of a further delivery branch line 5 b. In the exemplary embodiment shown, the second consumer 9 is designed as a hydraulic cylinder, ...

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PUM

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Abstract

The system (1) has a first load (7) actuatable by a first control valve (6) in intermediate positions. The first control valve is provided in control pressure pipes (20, 21). A second load (9) is fixed with a second control valve (8) by switching pressures (X1, Y1). Switching pressure of the first control valve is less than switching pressure of the second control valve. An operated valve device (27) is arranged in the control pressure pipes and a connecting trunk line (25). An actuating pressure valve (30, 31) is provided in the control pressure pipes.

Description

technical field [0001] The invention relates to a hydrostatic drive system with a pump for supplying a first consumer and a second consumer, wherein the first consumer can A control valve is actuated and the first control valve is actuatable by means of the control pressure present in the control pressure line, and wherein the second consumer is actuatable by means of the second control valve which is actuated by the control pressure, wherein The actuation pressure of the first control valve can be reduced in relation to the actuation pressure of the second control valve, and in order to reduce the actuation pressure of the first control valve, an actuation pressure of the second control valve is provided. valve device. Background technique [0002] Such load-sensing drive systems are used in mobile work machines, such as excavators. With the known drive system, a first consumer of a working machine designed as an excavator, which is designed as a slewing mechanism drive, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCE02F9/2225E02F9/2285E02F9/2296F15B11/162F15B2211/20546F15B2211/329F15B2211/355F15B2211/6355F15B2211/67F15B2211/7135F15B2211/781
Inventor T·比朔夫M·德尔格
Owner LINDE HYDRAULICS
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