Hydraulic dual circuit system

A dual-loop, loop technology, applied in servo meter circuits, fluid pressure actuating devices, earth movers/shovels, etc., can solve the problem of too large measurement orifice size

Inactive Publication Date: 2005-12-21
BOSCH REXROTH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, a disadvantage of this solution is that in the LUDV system the proportional directional valve with measuring orifice and the pressure balance downstream of the consumer respectively must be designed according to the volume flow, which is between two Combination of circuits allows maximum delivery to the assigned consumers
That is to say, when the system operates...

Method used

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  • Hydraulic dual circuit system

Examples

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Embodiment Construction

[0028] figure 1 A schematic diagram of an excavator control system is shown, which is designed as a dual-circuit system with two hydraulic circuits 2 , 4 . Consumers 8 , 10 of excavators such as the travel gear of the undercarriage with two caterpillar tracks, for example, or excavators such as the slewing mechanism, bucket handle, bucket or boom, can be controlled via two circuits equipment. The pressure medium supply of the two circuits 2 , 4 each takes place via auxiliary hydraulic pumps 6 , 7 which are preferably controlled as a function of the maximum load pressure in the respective circuit.

[0029] If the control consumer 8 requires more pressure medium than the assigned auxiliary hydraulic pump 6 can provide, the consumer 8 is operated undersaturated. To avoid such undersaturation, there is a combined valve arrangement 12 by which a predeterminable quantity of pressure medium can be delivered from the auxiliary hydraulic pump 7 to the consumer 8 .

[0030] In such a...

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Abstract

A hydraulic double circuit system for controlling consumers (8, 10) of mobile devices, in particular chain drives, wherein the two circuits can be combined for selected consumers by means of a combined valve arrangement (12) . The pressure medium supply to the consumers takes place via the LUDV-measuring orifice (14) and the LUDV-pressure balance (16) respectively. The combined valve arrangement (12) is configured in such a way that the combined volume flow from the combined circuit downstream of the measuring orifice (14) is supplied to the other circuit and/or the combination takes place rather late, i.e. with respect to the combined consumer by phase shifting.

Description

technical field [0001] The invention relates to a hydraulic double circuit system for controlling consumers of a mobile device, in particular a crawler device according to the preamble of claims 1 and 13 . Background technique [0002] US 6,170,261 B1 discloses a hydraulic double circuit system of a mobile device such as a chain device or a crawler device. In this crawler arrangement, the undercarriage has two crawlers which are each controllable independently of each other via a hydraulic circuit. In addition, the slewing gear and other unit equipment such as booms, bucket handles and buckets are connected to the two hydraulic circuits of the chain drive. Each of the two hydraulic circuits is supplied with pressure medium by an auxiliary hydraulic pump which is controlled depending on the respective highest load pressure of the consumers in the respective assigned circuit. However, other uses are also conceivable for the hydraulic dual circuit system, for example wheeled ...

Claims

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Application Information

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IPC IPC(8): E02F9/22F15B11/16F15B11/17
CPCE02F9/2239E02F9/2292E02F9/2296F15B11/163F15B11/165F15B11/17F15B2211/20546F15B2211/20576F15B2211/30505F15B2211/30555F15B2211/3111F15B2211/3144F15B2211/31576F15B2211/31582F15B2211/329F15B2211/40515F15B2211/6052F15B2211/6057F15B11/02
Inventor 沃纳·赫尔夫斯冈特·费尔蒂希
Owner BOSCH REXROTH AG
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