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Hydrostatic drive system to regulate demand flow

A technology for hydrostatic drive and adjustment requirements, applied in the direction of fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc., can solve problems such as power loss of unloading valves

Active Publication Date: 2018-06-12
LINDE HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But through the connection of the pump delivery line to the vessel, the unloading valve causes loss of power

Method used

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  • Hydrostatic drive system to regulate demand flow

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Embodiment Construction

[0033] The pump 2 is designed as a pump whose delivery volume can be adjusted steplessly, which operates in an open circuit and can be unilaterally switched between the position "MIN" with the minimum delivery volume and the position "MIN" with the maximum delivery volume with respect to the delivery volume. MAX” to adjust. The pump 2 is connected with a line 3 to a container 4 for sucking in the pressure medium and feeds it into a delivery line 5 . In order to control the direction of movement and the speed of movement, a control valve 7 is provided for each consumer V of the hydrostatic drive system 1 , which is designed as a directional control valve that throttles in the middle position. Only one control valve 7 for one consumer V is shown in the drawing. Of course, other control valves 7 can be similarly provided for other consumers V.

[0034] The control valve 7 shown in the drawing is connected to the delivery line 5 , the container 4 and the pressure medium lines 8 ...

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Abstract

Provided is a hydrostatic driving system for adjusting the demand flow. The hydrostatic driving system comprises at least one consumption device supplied with a pressure medium by a pump, a load-sensing-adjusting valve, and a loading pressure-a pressure stop valve, an unloading valve. The transport volume can be adjusted steplessly by the pump which operates in an open loop. The pump is provided with a transport volume adjusting device and utilizes the adjusting device to make adjdustments. The load-sensing-adjusting valve is arranged on an adjusting piston device of the adjusting device connected with the transport volume adjusting device and controlled by transport pressure of the pump, the maximum loading pressure of the consumption device and the unloading-sensing-adjusting pressure difference. The loading pressure-pressure stop valve is arranged on an indication pipeline of the loading pressure for maximum loading pressure of the consumption device and used for adjusting to the ultimate opening pressure. The discharge valve is used for controlling connection between a transport pipeline of the pump and a device under control of the transport pressure of the pump, the maximum loading pressure of the consumption device and unloading-pressure difference. The ultimate opening pressure of the loading pressure-pressure stop valve and unloading-pressure difference of the loading valve can be changed during operation of a driving system.

Description

technical field [0001] The invention relates to a hydrostatic drive system for regulating a demand flow, the drive system comprising at least one consumer (Verbraucher) supplied with pressure medium by a pump, wherein the pump can adjust the delivery volume steplessly and operates in an open circuit, wherein In order to change the delivery volume, the pump has a delivery volume adjustment device, the adjustment of the delivery volume adjustment device can be adjusted by an adjustment device, wherein the drive system includes a load-sensing-regulating valve, the load-sensing-regulating valve is equipped with The adjustment piston device connected to the delivery volume adjustment device belonging to the adjustment device, and the load-sensing-regulating valve is controlled by the delivery pressure of the pump, the maximum load pressure of the consumer and the load-sensing-regulating pressure difference, said The drive system includes a load pressure-pressure cut-off valve, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/00F15B21/08
CPCF15B11/0423F15B2211/20553F15B2211/6055F15B2211/6355
Inventor B·彼得斯W·克拉夫特
Owner LINDE HYDRAULICS
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