Two-pump confluence hydraulic control system

A hydraulic control system and dual-pump confluence technology, applied in the direction of fluid pressure actuation device, servo motor, servo motor assembly, etc., can solve the problem of large impact, and achieve the effect of reducing hydraulic impact

Active Publication Date: 2015-07-29
柳工(常州)矿山机械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-pump converging hydraulic system that can automatically close the dual-p

Method used

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Embodiment Construction

[0019] The specific implementation will be described below in conjunction with the accompanying drawings.

[0020] This embodiment is the application on the loader of the double-pump confluence hydraulic control system, such as figure 1 As shown, the hydraulic system includes the first hydraulic pump 6 as the working pump, the distribution valve 7, the boom cylinder 8, the bucket cylinder 9, the pilot valve 10, and the distribution valve 7 with two reversing main valves, the boom cylinder 8 and bucket oil cylinder 9 are respectively connected to one of the reversing main valves, and the pilot valve group 10 also has two connections. The two pilot valves in the pilot valve group 10 are respectively connected to The corresponding reversing main valve is connected to control the reversing action of the reversing main valve, thereby realizing the telescopic action of the reversing main valve to the boom cylinder 8 and the bucket cylinder 9 . In this hydraulic system, it also incl...

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Abstract

The invention relates to a hydraulic control system and discloses a two-pump confluence hydraulic control system to overcome the defect of large two-pump confluence hydraulic system impact. The system comprises a working hydraulic system, a second hydraulic pump and an electro-hydraulic control unloading valve group. A valve group confluence oil outlet is communicated with a valve group confluence oil inlet through a pipe working system, and a check valve is arranged between the valve group confluence oil inlet and the valve group confluence oil outlet. The oil inlet end of an external control spill valve is communicated with the oil inlet end of the check valve, and an oil outlet of the external control spill valve is communicated with a valve group unloading oil outlet. A solenoid directional valve and a hydraulic operated directional valve are connected in series and are then connected with an external control end of the external control spill valve and the valve group unloading oil outlet. The hydraulic control end of the hydraulic operated directional valve is connected with a pilot valve through a shuttle valve. The control unit comprises a controller and a displacement detection unit, and the electric control end of the solenoid directional valve is connected with a controller. By means of the system, the hydraulic impact of a hydraulic actuator at the stroke terminal can be reduced.

Description

technical field [0001] The invention relates to a construction machinery hydraulic control system, in particular to a dual-pump confluence hydraulic control system for oil supply from two pressure oil sources. Background technique [0002] Many construction machinery have multiple pressure oil sources for oil supply. For example, there are at least two pressure oil sources for loaders, one of which is used for steering hydraulic system, and the other is used for working hydraulic system to supply oil to working devices such as boom cylinder, steering Bucket cylinder and other oil supply. As the main force of construction machinery, loaders are widely used in many engineering projects due to their cheap price, convenient operation, and fast movement and transition. However, they have excessive fuel consumption, excessive discharge, and oil Disadvantages such as easy leakage. With the requirement of energy saving and consumption reduction, the energy saving and consumption r...

Claims

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Application Information

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IPC IPC(8): F15B11/17F15B13/06F15B13/16
CPCF15B11/17F15B13/06F15B13/16
Inventor 王素燕杨胜清武宗才李芸李茜
Owner 柳工(常州)矿山机械有限公司
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