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Flow amplifying valve and loading machine variable steering hydraulic system

A flow amplification and flow control valve technology, which is applied in the direction of fluid pressure actuators, mechanical equipment, servo motors, etc., can solve the problem that the flow amplification valve cannot directly use the variable hydraulic system, so as to improve the self-protection ability and simplify the hydraulic system , Improve the effect of expansion

Inactive Publication Date: 2017-05-03
QINGDAO LOVOL EXCAVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing flow amplifying valves for quantitative hydraulic systems cannot be directly used for variable hydraulic systems

Method used

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  • Flow amplifying valve and loading machine variable steering hydraulic system
  • Flow amplifying valve and loading machine variable steering hydraulic system

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.

[0027] Such as figure 1 As shown, a flow amplifying valve includes a connected flow control valve 11 and a pilot oil supply module 12. For the convenience of description, the flow amplifying valve is used as figure 1 The big dotted line box in the periphery indicates that the pilot oil supply module 12 is used figure 1 The small dotted line box in shows that the flow amplifying valve 1 also includes a first oil outlet A, a second oil outlet B, a first pilot oil port a, a second pilot oil port b and a third pilot oil port Pst, The first and second pilot oil ports and the first and second oil outlets are respectively connected to the flow control valve 11 , and the third pilot oil port Pst is connected to the pilot oil supply module 12 . The flow control valve 11 is connec...

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Abstract

The invention discloses a flow amplifying valve. The flow amplifying valve comprises a flow control valve, a pilot oil supply module, a first oil outlet, a second oil outlet, a first pilot oil port, a second pilot oil port and a third pilot oil port which are connected with one another, wherein the first pilot port and the second pilot oil port as well as the first oil outlet and the second oil outlet communicate with the flow control valve respectively; and the third pilot oil port communicates with the pilot oil supply module. The invention also discloses a loading machine variable steering hydraulic system. The loading machine variable steering hydraulic system comprises an oil tank, a variable pump, a steering device, a steering oil cylinder, a variable pump regulator and the flow amplifying valve, wherein an oil inlet of the flow control valve is connected with an oil outlet of the variable pump; the variable pump is connected with the variable pump regulator; and an oil inlet of the variable pump regulator is connected with a feedback oil port of the flow amplifying valve. The flow amplifying valve provided by the invention can be applied to the loading machine variable steering hydraulic system of a load-sensitive variable pump and realizes load-sensitive control.

Description

technical field [0001] The invention belongs to the technical field of loaders, in particular to a flow amplifying valve and a loader variable steering hydraulic system using the flow amplifying valve. Background technique [0002] At present, the hydraulic system on the loader mainly includes the working hydraulic system and the steering hydraulic system, and the hydraulic source of the system is mainly the quantitative gear pump, that is, the common quantitative hydraulic system. The steering hydraulic system is generally divided into two types, one is a steering hydraulic system with a small displacement steering gear and a flow amplification valve; the other is a steering hydraulic system with a large displacement steering gear and a priority valve. In loaders of 5 tons and above, the steering hydraulic system equipped with small displacement steering gear and flow amplifying valve has a good performance in terms of controllability and energy saving compared with other s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B11/17
CPCF15B13/021F15B11/17F15B2211/20546
Inventor 齐高品王桂民王宾王金华尹彦章秦建军姜峰赵斌蒙小行
Owner QINGDAO LOVOL EXCAVATOR
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