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Hydraulic excavator
2023-03-08
Excavator hydraulic transmission is closely related, and its development is mainly based on the application of hydraulic technology. Its structure is mainly composed of engine, hydraulic system, working device, walking device and electrical control parts, due to the poor working conditions of the excavator, the action required to achieve is very complex, so it puts forward high requirements for the design of the hydraulic system, its hydraulic system is also the most complex construction machinery hydraulic system. Therefore, the analysis and design of excavator hydraulic system has become an important part of promoting excavator. The single-bucket hydraulic excavator is a kind of mechanical equipment for periodic operation, which is composed of three parts: working device, rotating device and walking device.
Working devices include actuators, buckets and various replacement equipment that can be replaced according to work needs, such as shovel, backhoe, loading bucket and grab, etc. The typical working cycle is as follows:
(1) Excavating in the hard earth city is generally based on the bucket rod action, and the bucket cylinder is used to adjust the cutting Angle to cooperate with the excavation; When digging over in soft soil slope, the action of bucket cylinder is the main one. In the excavation action required by special requirements, the bucket cylinder, bucket rod cylinder and boom cylinder are combined. To ensure that the bucket moves in a specific path.
(2) The full bucket lifting and rotary excavation are completed, the bucket cylinder is launched, the moving cylinder is raised, and the full bucket is lifted; At the same time, the rotary motor starts, and the rotary table turns to the direction of unloading.
(3) The unloading turntable is turned to the unloading place. Turntable brake bucket rod cylinder to adjust discharge radius. Bucket cylinder back, rotating bucket unloading. When there are strict requirements on the unloading position and height. Also need to move with the boom kr.
(4) After the uninstallation is complete. The turntable turns in the reverse direction, and the boom cylinder and the bucket rod cylinder work together to lower the empty bucket to the new digging position. Single-bucket hydraulic excavator is widely used in construction, transportation, water conservancy construction, open-pit mining and modern military engineering, and is an indispensable main mechanical equipment in all kinds of earthwork construction.
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