Configuration of hydraulic element of excavator

Abstract

The invention discloses configuration of a hydraulic element of an excavator. The configuration comprises a main pump, a rotary motor and a main control valve. The main pump is connected with an engine through a spline of a main shaft. The main pump is connected with the main control valve through a hydraulic pipeline. A work oil opening of the main control valve is connected with large cavities and small cavities of all oil cylinder openings of the excavator and oil inlet and return openings of the rotary motor and a walking motor, and the rotary motor is a double rotary motor. The double rotary motor is adopted, displacement and starting torque are large, and when the excavator rotates, time consumed from a static state to a constant speed state is short, and work efficiency is greatly improved. Meanwhile, the contact area of the double rotary motor and a gear ring of the excavator is large, the borne unit area is small, and the service life of the excavator can be greatly prolonged. Internal oil channel design is optimized, the sealing mode of a one-way valve and the like is changed, so that the leakage amount becomes small, and energy waste is reduced.

Description

technical field [0001] The invention belongs to the field of engineering machinery hydraulic transmission, in particular to an excavator hydraulic component configuration. Background technique [0002] Hydraulic excavator is a kind of widely used engineering machinery, which is widely used in engineering construction. The matching of hydraulic components and the whole machine is a key point affecting the performance of the excavator, including the operability, efficiency and fuel consumption of the action, but in the existing hydraulic system configuration, the displacement of the pump is relatively small in the excavator of the same tonnage , in actual work, the power of the engine cannot be effectively utilized, resulting in slow efficiency; most of the slewing motors are driven by a single motor, which makes the starting torque of the excavator too small, resulting in slow starting speed and slow braking when stopping. The offset angle of the excavator is relatively larg...

AI Technical Summary

Problems solved by technology

The matching of hydraulic components and the whole machine is a key point affecting the performance of the excavator, including the operability, efficiency and fuel consumption of the action, but in the existing hydraulic system configuration, the displacement of the pump is relatively small in the excavator of the same tonnage , in actual work, the power of the engine cannot be effectively utilized, resulting in slow efficiency; most of the slewing motors are driven by a single motor, which makes the starting torque of the excavator too small, resulting in slow starting speed and slow braking when stopping. The offset angle of the excavator is large, and the meshing area of ​​the single slewing reducer and the excavator ring gear is small, resulting in short life, which is not conducive to the precise operation of the excavator and the improvement of efficiency

In addition, the spool diameter of the hydraulic main control valve is small, the rated flow rate is small, and the pressure loss is large. At the same time, due to the unreasonable design of the internal oil passage, the leakage is too large, resulting in a waste of energy

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