Hydraulic system of chassis of dredging machine
A hydraulic system and excavator technology, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problems of bulldozing shovel falling, oil leakage and pressure relief, and affecting the normal use of the excavator, so as to prevent the normal use of the excavator from being affected , the effect of preventing oil leakage
Active Publication Date: 2009-12-23
QINGDAO LOVOL EXCAVATOR
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Problems solved by technology
However, during the excavation process of the excavator, the compressed high-pressure oil in the large cavity of the bulldozing shovel cylinder impacts the sealing ring in the rotary joint of the hydraulic system, and the sealing ring is easy to wear, causing the sealing ring to be not tightly sealed, resulting in oil leakage and pressure relief. , when the hydraulic oil pressure is too low to resist the gravity of the bulldozer blade, the bulldozer blade will fall, affecting the normal use of the excavator
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Embodiment Construction
[0010] The present invention will be described below in conjunction with the accompanying drawings: a hydraulic system for excavator chassis according to the present invention includes a rotary joint 1, such as figure 2 As shown, the rotary joint 1 is composed of a rotary shaft 11, a rotary body 12, a cover body 13 and a sealing ring. The required intermediate oil passage 14 is opened in the rotary shaft 11, and a plurality of ring grooves are opened inside the rotary body 12. Between the ring grooves There is a sealing ring 15 between them, and there are oil holes 21 and 22 connected with the middle oil circuit 14 on the outside. The ring grooves on the rotary body 12 correspond to the oil holes one by one, and the oil holes 21 and 22 communicate with the hydraulic lock block through the pipeline. Body 3 is connected; such as image 3 As shown, a chamber 35 and a first oil hole 31, a second oil hole 32, a third oil hole 33 and a fourth oil hole 34 communicated with the chamb...
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The invention discloses a hydraulic system of a chassis of a dredging machine, belonging to the field of dredging equipment and comprising a swivel joint. The wherein swivel joint is provided with a middle oil way and a plurality of oil holes communicated with the middle oil way, the oil holes are respectively communicated with a dozer blade oil tank and a travel motor through pipelines, and a pipeline which connects the swivel joint with a dozer blade is provided with a hydraulic lock which can prevent pressed high-pressure oil inside a large cavity of the dozer blade oil tank from directly flowing back to the swivel joint when the dredging machine carries out dredging operation. The hydraulic system can effectively protect an inner sealing ring of the swivel joint from being impacted by the pressed high-pressure oil when the dredging machine carries out the dredging operation, thereby preventing the oil leakage and preventing the dozer blade from dropping out.
Description
technical field [0001] The invention relates to an excavator chassis hydraulic system. Background technique [0002] Some current excavators not only have digging buckets but also dozer blades. When the bulldozer blade is not in use, it is lifted by the pressure of hydraulic oil so that the excavator can walk easily. However, during the excavation process of the excavator, the compressed high-pressure oil in the large cavity of the bulldozing shovel cylinder impacts the sealing ring in the rotary joint of the hydraulic system, and the sealing ring is easy to wear, causing the sealing ring to be not tightly sealed, resulting in oil leakage and pressure relief. , When the hydraulic oil pressure is too low to resist the gravity of the bulldozer blade, the bulldozer blade will fall, affecting the normal use of the excavator. Contents of the invention [0003] The object of the present invention is to provide an excavator chassis hydraulic system, which can effectively protec...
Claims
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Inventor 张博友胡学军陈志强张军荣彭乐迎陈代洪李亮宇吕金良
Owner QINGDAO LOVOL EXCAVATOR