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Hydrostatic drive system

A hydrostatic drive, hydraulic technology, applied in the direction of fluid pressure actuation device, transmission device control, servo motor, etc., can solve the problems of reduced pump delivery, low power performance of the drive system, reduced power performance, etc. Effect

Inactive Publication Date: 2016-05-04
LINDE HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydraulic reset signal exceeds the demand of the consumer, detects an excessively delivered volume flow of the pump and causes a reduction in the pump delivery rate through which, in the case of such a consumer movement, a reduction in the consumer movement is caused dynamic performance and thus a small dynamic performance of the drive system

Method used

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Examples

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Embodiment Construction

[0026] exist figure 1A circuit diagram of a load-sensing regulated drive system 1 according to the present invention is shown in . The drive system 1 is used, for example, in mobile work machines, preferably excavators or ground vehicles.

[0027] The drive system 1 has a pump 2 with an adjustable delivery volume flow, which is operated in an open circuit and is in drive connection with a drive machine 3 , for example an internal combustion engine, for drive. The pump 2 is connected on the suction side to a container 5 by means of a line 4 and delivers pressure medium into a delivery line 6 .

[0028] In order to control one or more consumers V, a control valve 7 is provided in each case, which is designed as a directional valve that throttles in the middle position.

[0029] The control valve 7 is connected to the delivery line 6 , to a container line 9 and to pressure medium lines 8 a , 8 b leading to consumers V . When the control valve 7 is actuated, the control valve 7...

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Abstract

The invention relates to a hydrostatic drive system (1), having a conveying volume flow adjustable pump (2), wherein the pump is set to supply for at least one consumption unit (V); a conveying volume flow adjusting device (10) for the pump (2) controls toward the direction of increasing the conveying volume flow by means of the preset signal and controls towards the direction of reducing the conveying volume flow according to the hydraulic reset signal of the volume flow which is conveyed excessively; a circulating pressure balance (31) is set in order to generate a reset signal; the circulating pressure balance generates a reset signal in a reset signal generating location (31b); and according to the invention, a pressure limiting device (50) is set for guiding a reset signal line (32) of the reset signal, and a shutoff device (70) is set for the reset signal.

Description

technical field [0001] The invention relates to a hydrostatic drive system with a pump with an adjustable delivery volume flow, which is designed to supply at least one consumer, wherein the delivery volume flow adjustment device of the pump is controlled by prefeeding The constant signal is applied in the direction of increasing the delivered volume flow and is acted upon in the direction of decreasing the delivered volume flow according to a hydraulic reset signal which detects an excess delivered volume flow of the pump, wherein a cyclic pressure balance is provided for generating the reset signal , the cyclic pressure balance generates the hydraulic reset signal in a reset signal generating position. Background technique [0002] In such a drive system, the delivery volume flow of the pump is adjusted to the volume flow demand required by the controlled consumer, so that the consumer can move at a movement speed predetermined at the control valve with little energy loss....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/02F15B13/02F16H61/40
CPCF15B11/055F15B2211/20553F15B2211/255F15B2211/3111F15B2211/3144F15B2211/6336F15B2211/6346F15B2211/7058F16H61/4148F16H61/433
Inventor A·霍舍尔D·里希特M·德尔格A·格罗斯曼
Owner LINDE HYDRAULICS
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