Excavator rotary hydraulic system
A technology of hydraulic system and excavator, applied in the field of rotary hydraulic system, can solve the problems of high oil waste rate, low utilization rate of passive arm, singleness, etc., and achieve the effect of saving energy
Active Publication Date: 2021-04-16
德润液压科技(常州)有限公司
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Problems solved by technology
[0002] The excavator has a slewing platform, which includes the rotation and braking of the slewing platform in each excavation cycle, which will cause a lot of waste of hydraulic oil in the braking of the slewing platform. The energy system, but relatively simple, is accompanied by the movement of the boom at the same time as or after the slewing brake, and the recovery of hydraulic oil and then directly supplying it to the boom has not been used so far, or the utilization rate of the driven boom is not high. High oil waste at the boom
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Embodiment Construction
[0015] The present invention will be further described below in conjunction with accompanying drawing.
[0016] like figure 1 As shown, the present invention provides an excavator slewing hydraulic system, which includes an oil tank 1, a filter 2, a main variable pump 4, an electric motor 5, a first overflow valve 7, a main reversing valve 8, and a hydraulic motor 9 , the slewing mechanism 10, the second relief valve 11, the third relief valve 12, the first main oil circuit 101, the second main oil circuit 102, the controller (not shown in the figure), the first main oil circuit 101 and The second main oil circuit 102 is located between the main reversing valve 8 and the hydraulic motor 9, the second relief valve 11 is arranged on the passage from the first main oil circuit 101 to the fuel tank, and the second main oil circuit 102 is provided on the passage to the fuel tank. A third overflow valve 12 is provided,
[0017] The passage from the first main oil circuit 101 to th...
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The invention discloses a rotary hydraulic system of an excavator, which is characterized in that the system includes a fuel tank, a filter, a main variable pump, an electric motor, a first overflow valve, a main reversing valve, a hydraulic motor, a rotary mechanism, a second Relief valve, third relief valve, first main oil circuit, second main oil circuit, the first main oil circuit and the second main oil circuit are located between the main reversing valve and the hydraulic motor, the first main oil circuit to A second overflow valve is provided on the passage of the fuel tank, a third relief valve is provided on the passage from the second main oil circuit to the fuel tank, a third one-way valve is provided on the passage from the first main oil circuit to the fuel tank, and the second A fourth one-way valve is arranged on the passage from the main oil circuit to the oil tank. The invention uses the cartridge valve to control the on-off of the oil circuit, which can improve the stability of the overall operation of the system.
Description
technical field [0001] The invention belongs to the field of excavators, and in particular relates to a rotary hydraulic system. Background technique [0002] The excavator has a slewing platform, which includes the rotation and braking of the slewing platform in each excavation cycle, which will cause a lot of waste of hydraulic oil in the braking of the slewing platform. The energy system, but relatively simple, is accompanied by the movement of the boom at the same time as or after the slewing brake, and the recovery of hydraulic oil and then directly supplying it to the boom has not been used so far, or the utilization rate of the driven boom is not high. The oil waste rate at the boom is high. Contents of the invention [0003] In order to solve the above problems, the present invention provides a rotary hydraulic system. [0004] The present invention specifically adopts the following technical solutions to realize, [0005] An excavator slewing hydraulic system, ...
Claims
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IPC IPC(8): E02F3/42E02F9/22
CPCE02F3/42E02F3/425E02F9/225E02F9/2264
Inventor 施享
Owner 德润液压科技(常州)有限公司