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Hydraulic system of mechanically operated quadruple pump

A hydraulic system and mechanical operation technology, which is applied in the field of mechanically operated quadruple pump hydraulic system, can solve problems such as difficult troubleshooting and maintenance, reduced working efficiency and service life of components, and increased operational fatigue.

Active Publication Date: 2013-04-24
YUZHOU HYDRAULIC EQUIP FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the hydraulic system of the crane adopts a multi-actuator parallel system, that is, the hydraulic oil source is connected in parallel to supply oil to multiple hydraulic actuators. When oil is needed, that is, when the flow rate of the valve is oversaturated, there will be pressure interference between multiple actuators connected in parallel, and the actuator with greater resistance will not be able to obtain the required oil flow, resulting in slow or even inoperable action.
At present, the safety direction control method of the hydraulic pilot operated truck crane basically adopts the combined control valve. This method causes the system pipeline to be huge and complicated, and it is difficult to troubleshoot and repair.
[0004] The opening and closing control of the brakes of the slewing mechanism, the main hoisting mechanism and the auxiliary hoisting mechanism are mostly directly controlled by the high-pressure oil in the working oil circuit. In the Tadano system in Japan, the brakes are mechanically operated by manually pulling the rod, and the brakes are normally open during work. , which will lead to a decrease in system efficiency and service life of components, complicated control, and greatly increased operational fatigue

Method used

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  • Hydraulic system of mechanically operated quadruple pump
  • Hydraulic system of mechanically operated quadruple pump
  • Hydraulic system of mechanically operated quadruple pump

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as Figure 1 to Figure 6 As shown, the description of the icon numbers is as follows: the first oil pump 11, the second oil pump 12, the third oil pump 13, the fourth oil pump 14, the swing hydraulic system 2, the swing brake control valve group 21, the swing buffer valve group 22, the first shuttle valve 22a, intermediate circuit 22b, second pressure reducing valve 22c, first reversing valve stem 23, swing motor 24, first hydraulic control reversing valve 25, driving end 25a, spring chamber 25b, second shuttle valve 26, first One-way throttle valve 27, slewing brake 28, boom telescopic hydraulic system 3, telescopic oil cylinder switching valve group 31, first one-way balance valve 32, first telescopic oil cylinder 33, transition sleeve 33a, second telescopic oil cylinder 34, The second hydraulic control reversing valve 35, the d...

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Abstract

The invention relates to a hydraulic system of a mechanically operated quadruple pump, comprising a first oil pump, a second oil pump, a third oil pump, a rotary hydraulic system, a boom expansion hydraulic system, a control hydraulic system, a lifting hydraulic system, a boom amplitude hydraulic system and a pilot oil-source valve group; the opening and closing characteristics of a rotary brake and main and accessory hoisting brakes all adopt a constant-pressure oil-source control mode and intelligently and automatically control the brakes according to the operation of various actions without the need of additional external force operation; according to the different opening and closing characteristics of each mechanism, a rotary structure is in a quick-opening slow-closing control mode,main and accessory hoisting mechanisms are in a slow-opening quick-closing control mode, and the pressure impaction of the system is effectively eliminated; a flow distribution valve adopts a flow distribution mode which is unrelated to load and effectively prevents slow action or no action of a high-load-pressure actuating mechanism for pressure interference among actuating mechanisms; and in a complete vehicle system, elements are highly integrated and modularized, thereby reducing pipelines of the complete vehicle system and being convenient for maintenance.

Description

technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a mechanically operated four-pump hydraulic system, which is suitable for on-board use of truck cranes, crawler cranes and truck-mounted cranes. Background technique [0002] During the working process of the crane, it is necessary to frequently complete the actions of lifting with load, slewing with load, lowering of heavy objects, luffing and return without load. In order to achieve efficient work, the crane needs to be able to perform compound actions, that is, the above two or more simultaneous Action, with the continuous development and progress of crane technology, the requirements for the safety control of each actuator, the opening and closing characteristics of each actuator and the high integration of the hydraulic system components of the vehicle are also getting higher and higher. [0003] At present, the hydraulic system of the crane adopts a multi-actuator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C13/00
Inventor 卢宇李新邹泉敏刘峰刘富良
Owner YUZHOU HYDRAULIC EQUIP FACTORY
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