Excavator movable arm potential energy saving device and method based on air cylinder and variable-diameter roller

Abstract

The invention discloses an excavator movable arm potential energy saving device and method based on an air cylinder and a variable-diameter roller, and is suitable for being used by an excavator. The excavator movable arm potential energy saving device comprises a potential energy storage device and a hydraulic system; and the potential energy storage device comprises a large roller and a speed reducer pinion which are coaxially arranged through a support, and a speed reducer large gear and a reducing roller which are coaxially arranged, the speed reducer large gear and the speed reducer pinion are meshed with each other, the large roller is connected with a pull rod arranged on a movable arm through a wound thin steel wire rope, the pull rod and the thin steel wire rope need to guarantee that the thin steel wire rope does not make contact with other parts of the excavator in the lifting process of the movable arm, and the tension change is as small as possible, the reducing roller is connected with an air cylinder through a thick steel wire rope which is connected with a piston rod of the air cylinder, and the air cylinder is connected with an air bottle through a pipeline. The excavator movable arm potential energy saving device is simple in structure, convenient to implement and low in cost, hydraulic elements and electric control systems do not need to be additionally arranged, and complex energy conversion and transmission links of a hybrid power unit are avoided.

Description

technical field [0001] The invention relates to an excavator arm potential energy-saving device and method based on a cylinder and a variable-diameter roller, which is especially suitable for use in hydraulic engineering and belongs to the field of hydraulic transmission and control. Background technique [0002] Existing hydraulic excavator working devices will accumulate large gravitational potential energy during lifting operations, and this part of energy will be converted into heat energy and dissipated at the valve port through the throttling effect of the valve. Statistics show that the energy wasted in this part of the medium-sized hydraulic excavator accounts for more than 15% of the energy consumption of the whole machine, which not only causes a huge waste of energy, but also makes the temperature of the hydraulic oil rise rapidly, affecting continuous operation and causing failure. [0003] In the recoverable energy of the excavator, the recoverable energy of the...

AI Technical Summary

Problems solved by technology

At present, for the recovery and reuse of the potential energy of the boom lowering, most of them use oil-electric hybrid and oil-liquid hybrid methods. In the hybrid power system, a large number of electrical components will increase the cost of the system, and the entire energy recovery process needs to go through Multiple energy conversions and multiple control links will lead to low energy regeneration efficiency of the system; the hydraulic hybrid system stores energy in the form of hydraulic energy in the hydraulic accumulator through energy conversion components such as rotary motors and hydraulic pumps / motors , the whole process changes a lot to the original hydraulic system, and there are more conversion and transmission links in the energy recovery, and the recovery and reuse efficiency of the gravitational potential energy of the boom is restricted.

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