Driven System and Characteristics Research of Large#br# Hydraulic Shovel Swing Motion

doi:10.3901/JME.2017.06.176

Abstract

Abstract:

Mining hydraulic shovel is one of widely used equipment in open-pit mining and large engineering construction. However, the shovels used in domestic are always dependent on importation. In 2008, Taiyuan Heavy industry started to research and development the first domestic mining hydraulic shovel whose weight is 260 t and capacity of the bucket is 15 m³. Swing motion is the most frequent movement of mining excavator and each operating cycle includes two times of acceleration and deceleration. If the swing circuit can’t be designed will, that will cause serious heating of system and impact the working efficiency of the machine. In order to shorten design period and comprehend the working performance before the construction of the real system, the advantages and disadvantages of open circuit and closed circuit are analyzed to determine the specifications and parameters of hydraulic components. The mechanical dynamic simulation software ADAMS and mechatronic system simulation software AMESim are used to build the co-simulation model of whole designed mining hydraulic shovel. During the working process of mining excavator, the operation performance and energy efficiency characteristic of the two circuit are simulated, a method that using electro hydraulic proportional controlled double closed circuits for swing control driven in parallel way is determined. An electro-hydraulic proportional pump is used to control the rotary motor directly, which can avoid the throttling loss of valve controlled system. Meanwhile, in order to simplify the circuit, the hydraulic shovel own pilot pump is used to realize the compensating of closed circuit.The influence of rotary inertia’s large range variety on the rotation characteristic is further simulated and researched, the relationship between the time acceleration and deceleration and swing angle. The whole electro-hydraulic swing system is designed and applied the designed mining hydraulic shovel. Field tests and trial run tests indicate that the designed electro hydraulic proportional controlled double swing closed circuits can smoothly control the upper car acceleration and deceleration under the condition of large range variety of rotary inertia, the heating is small and the shovel can work continuous for a long time.

Key words: braking energy, closed hydraulic circuit, swing system, hydraulic shovel

ZHAO Bin, QUAN Long, HUANG Jiahai, CHENG Hang, LI Guang, ZHANG Yongming. Driven System and Characteristics Research of Large#br# Hydraulic Shovel Swing Motion[J]. Journal of Mechanical Engineering, 2017, 53(6): 176-186.

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