Wheel type engineering machinery hydraulic control system and wheeled crane applying same
A technology of hydraulic control system and construction machinery, which is applied in the direction of hydraulic brake transmission device, mechanical equipment, fluid steering mechanism, etc. It can solve the problems of high manufacturing cost, complicated pipeline, self-heavy, etc., and achieve control of manufacturing cost, control of overall The effect of reducing the weight of the machine and simplifying the layout
Active Publication Date: 2011-06-15
XUZHOU HEAVY MASCH CO LTD
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Problems solved by technology
This brings about two problems. On the one hand, the output of each hydraulic pump source has not been fully and effectively used. On the other hand, the number of hydraulic pumps is too large, the pipeline is too complicated, the manufacturing cost is high, and the self-weight is too large.
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[0024] The core of the present invention is to provide a hydraulic control system for wheeled construction machinery that utilizes oil sources reasonably, and can fully and effectively utilize the oil sources on the basis of meeting the functional requirements of each actuator. The present embodiment will be described in detail below in conjunction with the accompanying drawings.
[0025] See figure 1 , which is a schematic diagram of the wheeled chassis hydraulic control system in this embodiment.
[0026] Such as figure 1 As shown, the main pump 1 of the hydraulic control system of the wheeled construction machinery is used to output pressure oil to the system pressure oil circuit as the main source of working oil for the first actuator, the second actuator and the third actuator.
[0027] Without loss of generality, the first actuator of this embodiment takes the wheel brake cylinder 21 and the parking brake cylinder 22 as examples, the second actuator takes the left stee...
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The invention discloses a wheel type engineering machinery hydraulic control system which comprises a main pump, a first executive component, a second executive component, a third executive component, an energy accumulator, a first preferential valve and a first switch valve, wherein the oil port of the energy accumulator is communicated with the first executive component; the oil inlet of the first preferential valve is communicated with the outlet of the main pump, the preferential working oil port of the first preferential valve and the oil port of the energy accumulator are conducted, theload feedback oil port of the first preferential valve and the feedback oil port of the second executive component are conducted, a first orifice is arranged between the control oil port and load feedback oil port of the first preferential valve, and the auxiliary working oil port of the first preferential valve is communicated with the working oil port of the third executive component; the firstswitch valve is arranged on a passageway between the preferential working oil port of the first preferential valve and the second executive component; and the control oil port of the first switch valve is communicated with the preferential working oil port of the first preferential valve. According to the invention, oil resources can be fully and effectively utilized, and the systematic layout issimplified. On the basis, the invention also discloses a wheeled crane applying the wheel type engineering machinery hydraulic control system.
Description
technical field [0001] The invention relates to the technical field of wheeled engineering machinery, in particular to a hydraulic control system for wheeled engineering machinery and a wheeled crane applying the system. Background technique [0002] Most of the wheeled construction machinery is composed of two parts: a tire-type chassis and a boarding mechanism. It has a flexible self-propelled function, so it can be widely used in various construction operations. As we all know, the self-propelled function of the wheeled chassis requires reliable steering and braking systems to provide protection. [0003] At present, in order to meet the increasing functional requirements of customers and meet the development trend of large-scale, high-efficiency, safe and lightweight construction machinery, the hydraulic control system of construction machinery is also facing high-standard requirements. The following takes a wheeled crane as an example to describe in detail. [0004] T...
Claims
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IPC IPC(8): F15B1/02F15B13/02B60T11/16B62D5/06B66C13/20
Inventor 朱亚夫曹光光张付义韩龙叶海翔
Owner XUZHOU HEAVY MASCH CO LTD