Converging and accelerating hydraulic system for bucket of excavating machine
A technology for excavators and buckets, which is applied in the field of construction machinery, can solve problems such as low work efficiency and slow bucket speed, and achieve the effects of improving overall machine performance, increasing operating speed, and reducing energy loss
Active Publication Date: 2014-08-13
中外合资沃得重工(中国)有限公司
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Problems solved by technology
The existing excavator bucket oil cylinder only has a single pump for oil supply, the bucket speed is relatively slow, and the working efficiency of the whole machine is low
Method used
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Embodiment Construction
[0009] The present invention will be further described below in conjunction with drawings and embodiments.
[0010] This example figure 1 As shown, it includes a hydraulic pump group 1 composed of a front pump 11 and a rear pump 12 in parallel, a central controller 2, a pilot control valve 3, a shuttle valve group 4 composed of several shuttle valves, a pressure switch 5, and a first pressure sensor 6 , the second pressure sensor 7, the third pressure sensor 8, the main valve 9 of the multi-valve connection combination, the two-position three-way hydraulic reversing valve 10 with the travel logic function, the confluence valve 101, the confluence shuttle valve 102, and the bucket cylinder 103 , the main valve 9 includes a three-position six-way hydraulic reversing valve 91 for controlling the reversing of the bucket cylinder, and a two-position four-way hydraulic reversing valve 92 for controlling straight-line travel. The output end of the front pump 11 leads to the front an...
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The invention discloses an excavator bucket hydraulic system with confluence acceleration function. The output ends of the hydraulic pump group respectively lead to the front and rear chambers of the bucket oil cylinder through the main valve, and the Pi2 end of the hydraulic pump group control oil circuit communicates with the shuttle valve group. , the shuttle valve group communicates with the pilot control valve, and also communicates with the two-position three-way hydraulic directional valve; one end of the first and second pressure sensors leads to the central controller respectively, and the control oil circuit of the two-position four-way hydraulic directional valve passes through The pressure switch leads to the central controller, the control oil circuit of the shuttle valve group communicates with the P end of the confluence valve, the A end of the confluence valve communicates with the first end of the confluence shuttle valve, and the second end of the confluence shuttle valve communicates with the other end of the first pressure sensor , the third end of the confluence shuttle valve leads to the shuttle valve group. When the bucket operates alone, the double pumps can be combined to increase the running speed of the bucket; when there is any compound action, the single pump supplies oil to the bucket cylinder, so that the compound action can be coordinated. The flow change of the double pumps is controlled by the central controller, which further improves the performance of the whole machine.
Description
technical field [0001] The invention relates to a hydraulic system of an excavator working device, in particular to a hydraulic system of an excavator bucket capable of working quickly, and belongs to the technical field of engineering machinery. Background technique [0002] An excavator is an earth-moving machine that uses a bucket to dig or move soil or materials above or below the bearing surface, load it into a transport vehicle or unload it to a stockyard. The existing excavator bucket oil cylinder only has a single pump for oil supply, the bucket speed is relatively slow, and the working efficiency of the whole machine is low. With the improvement of people's functional requirements for excavators, it is necessary to propose a hydraulic system that can increase the working speed of the excavator bucket. For the confluence function, other methods must be used to achieve confluence, and the output flows of the two hydraulic pumps in the hydraulic system are combined i...
Claims
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IPC IPC(8): E02F9/22
Inventor 牛选平高剑英魏兴虎薛传林孙永建韦永钊
Owner 中外合资沃得重工(中国)有限公司