Electro-hydraulic system for crawler crane

Abstract

The invention provides an electro-hydraulic system for crawler cranes and relates to the technical field of control systems for hoisting equipment. The electro-hydraulic system comprises a direct current speed regulating system, a load regulating system, a hydraulic system and a display, wherein, the direct current speed regulating system comprises a direct current speed regulator which is connected with a direct current motor that is connected with an oil pump for supplying the hydraulic system with hydraulic oil, the hydraulic system is connected with a hoisting mechanism, a luffing mechanism, a slewing mechanism, a running mechanism and an oil cylinder of a crawler crane. The electro-hydraulic system for crawler cranes provided in the invention enables usage and maintenance cost of cranes to be substantially reduced, environmental pollution to be cut down and reliability and security of operation of the cranes to be improved, and is simple to operate, thereby mitigating fatigue of drivers and enhancing working efficiency. The successful research and development of the system enables a blank in the field of electro-hydraulic systems in China to be filled and has a high popularization value.

Description

Technical field [0001] The invention relates to the technical field of control systems for lifting equipment, in particular to an electric hydraulic system of a crawler crane. Background technique [0002] The crawler crane is a mobile crane that installs the lifting operation part on the crawler chassis and relies on the crawler device. It can carry out operations such as material lifting, transportation, loading and unloading and installation. Crawler cranes have the advantages of strong lifting capacity, small ground pressure, small turning radius, large climbing ability, no outriggers, running with load, good working stability, and free replacement of the truss combination height. They are widely used in electric power, Construction industries such as municipal administration, bridges, petrochemicals, water conservancy and hydropower. At present, there are generally two types of control systems used in crawler cranes: full hydraulic system and full electric system. The ful...

AI Technical Summary

Problems solved by technology

The full hydraulic system is driven by a diesel engine with an oil pump to drive each reducer and motor to work. The whole machine is stable and reliable, and the operation is simple. The disadvantage is that it uses diesel as the power source, which makes the use and maintenance costs very high.

The all-electric system is driven by the electric motor to work the various reducers. Although it does not consume fuel, the whole machine is bulky and heavy, and the operating procedures are also very complicated.

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