Construction Of Excavator
Common excavator structures include power plant, working device, rotary mechanism, operating mechanism, driving mechanism, walking mechanism and auxiliary facilities.
The drive mechanism passes the power of the engine to the hydraulic motor, hydraulic cylinder and other executive components through the hydraulic pump, and pushes the operation of the working device to complete various operations.
Walking device or chassis, including crawler frame and walking system, mainly by the crawler frame, walking motor + reducer and its piping, driving wheel, guide wheel, chain wheel, roller, caterpillar, tensioning of buffer device, its function to support the weight of the excavator, and the driving wheel transmission power into the traction, achieve the walking machine.
Frame assembly (i.e. the crawler walking frame assembly) for whole product, USES the X structure, its main advantage is with high bearing capacity. From left girder frame assembly (i.e. the crawler frame from left), the main frame longitudinal beam (middle frame), right (that is, the right side frame) three parts welded together. The weight of the frame assembly is 2 tons.
Central swivel joint is connected oil hydraulic slewing platform and chassis components, it guarantees slewing platform after rotation at any Angle, the walking motor can normal oil distribution, current rotary joint is 5 .
Is the main component of hydraulic excavator working device, current configuration SY series excavator backhoe working device, it is mainly used for digging down below the surface soil, but also can mining maximum cutting height under soil, besides can dig a hole, furrowing, loading can also create a simple site work. Mining operations Ⅰ ~ Ⅳ level soil, adapted to the excavation Ⅴ magnitude with hydraulic hammer or blasting method.
The backhoe working device consists of a moving arm, a bucket pole, a bucket, a rocker, a connecting rod and a working device hydraulic pipeline including a moving arm oil cylinder, a bucket oil cylinder and a bucket oil cylinder.
Power transmission route list
1. The power transmission line to walk: diesel engine, coupling, hydraulic pump (mechanical energy into hydraulic energy) - distributing valve, the central swivel joint, walking motor (hydraulic energy into mechanical energy) - reducer - driven chain wheel - rail track - walk
2 rotary motion transmission routes: diesel engine, coupling, hydraulic pump (mechanical energy into hydraulic energy) - distributing valve - rotary motor (hydraulic energy into mechanical energy) - rotary reducer, slewing bearing, implementation
3. Motor arm movement transmission route: diesel engine -- coupling joint -- hydraulic pump (mechanical energy converted to hydraulic energy) -- distribution valve -- moving arm oil cylinder (hydraulic energy converted to mechanical energy) -- realize arm motion
4. Bucket pole motion transmission route: diesel engine -- coupling joint -- hydraulic pump (mechanical energy converted to hydraulic energy) -- distribution valve -- bucket rod oil cylinder (hydraulic energy converted to mechanical energy) -- realize bucket pole motion
5. Bucket movement transmission route: diesel engine -- coupling -- hydraulic pump (mechanical energy converted to hydraulic energy) -- distribution valve -- bucket oil cylinder (hydraulic energy converted to mechanical energy) -- bucket movement
Structure and function of power system
Air intake system, net to hose, air filter and hose to the supercharger, hose to cold machine, hose to engine, exhaust system, supercharger, expansion joint to muffler, the exhaust pipe and cooling system, water tank hose to thermostat, water pump and diesel engine to hose, water tank, the throttle control system, stepping motor to speed reducer, the worm gear and worm drive - throttle pull - diesel engine throttle - high idle speed, low idle speed limit switch, fuel systems
Fuel tank, hose, hand pump, crude filter, fine filter and diesel engine
Oil return system: diesel engine, rubber tube, fuel tank (large amount of oil return, use it for partial cooling)