An excavator oil-hydraulic hybrid power control system with energy recovery and conversion
A technology of energy recovery and hybrid power, which is applied in the direction of mechanically driven excavators/dredgers, etc., can solve the problems of expensive components, difficult to be widely used, and low storage efficiency, so as to reduce emissions, reduce pressure loss along the way, and save energy Effect
Active Publication Date: 2015-12-02
NANJING TECH UNIV +1
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Problems solved by technology
Generally, gasoline-electric hybrid technology stores energy in batteries or supercapacitors. Due to the low energy conversion and storage efficiency of storing energy in batteries or supercapacitors, and the high cost of components, this type of solution is difficult to be widely used.
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[0034] as attached Figure 5 . Usually, excavators need to complete a complete working cycle of digging, turning, unloading, and turning when shoveling earth and stone. During the excavation process, the lifting and lowering of the boom oil cylinder 18 is carried out intermittently, and the range is not large. The hydraulic accumulator flows into the hydraulic accumulator through the port of the second one-way valve 15P1 to recover the potential energy of the boom. After the excavation is completed, the left pilot control handle 35 controls the rotation of the excavator, and the normal rotation energy can be released at this time. After the slewing condition is completed, the braking energy is recovered, and the hydraulic circuit is as described above. When the unloading operation is performed after the slewing is completed, the unloading operation is usually the combined action of the stick, bucket and boom. 2. The pressure signal of the pressure sensor 38 is used to deter...
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The invention discloses an excavator oil-liquid hybrid power control system with functions of energy recovery and conversion. The excavator oil-liquid hybrid power control system comprises a main controller, an oil tank, and a boom cylinder, an arm cylinder and the bucket cylinder which are connected to the oil tank. Two variable pumps are respectively connected to the oil tank; a first variable pump is connected to an engine and is connected to a first three-position four-way valve and a rod cavity of the boom cylinder; the rod cavity of the boom cylinder is connected to a first two-position two-way valve; the first three-position four-way valve is connected to a first shuttle valve which is connected to a fifth two-position two-way valve and a first three-position three-way valve; the fifth two-position two-way valve is connected to the arm cylinder and the first three-position three-way valve; the first three-position three-way valve is connected to a sixth two-position two-way valve and a two-position three-way valve; the sixth two-position two-way valve is connected to the bucket cylinder; and the two-position three-way valve is connected to a hydraulic accumulator, a supercharger, a third two-position two-way valve, a fourth two-position two-way valve and a third three-position three-way valve.
Description
technical field [0001] The invention relates to an excavator energy recovery and conversion system, in particular to an excavator oil-fluid hybrid control system with energy recovery and conversion. Background technique [0002] Hydraulic excavator is the main type of construction machinery, which has been widely used in construction, transportation, water conservancy, mining and other fields, and consumes a lot of energy. Due to the global energy crisis and the continuous improvement of environmental protection requirements, the research on energy-saving technology of hydraulic excavators has become a A very urgent subject. The traditional hydraulic excavator does not recycle the energy of the boom lowering and the kinetic energy of the slewing system during deceleration and braking, so that these energies are lost in vain as heat energy. The current boom circuit on the current excavator only has the function of flow regeneration. When the slewing system is decelerating an...
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IPC IPC(8): E02F3/42
Inventor 殷晨波刘辉曹东辉王彤熳叶仪
Owner NANJING TECH UNIV