A hydraulic system of a dual-purpose excavator

Abstract

The invention relates to a hydraulic system of a dual-purpose excavation and shoveling machine. The hydraulic system comprises a hydraulic oil tank, oil supply systems, an oil return system, an amplitude changing system, a telescopic system, a rotation system, an air conditioner system and a supporting system, wherein the amplitude changing system, the telescopic system, the rotation system, the air conditioner system and the supporting system are connected with the hydraulic oil tank through the oil supply systems and the oil return system, and respective hydraulic circuits are formed. Compared with the prior art, the hydraulic system has the advantages that switching between soil shoveling operation and excavation operation can be conducted, and the equipment investment cost is greatly saved; the output power at the position of a claw is high, and the claw is applicable to construction of harder ground conditions; the rotation angle of a rotation center is larger than 360 degrees, the working area is large, and the working efficiency is high; the safety is higher when high-difficulty operation is conducted; an air conditioner is additionally arranged in an operating room; a cooling system is arranged on an oil return pipeline, and the service life of the machine is prolonged; the system is simple in structure and reliable in operation, and convenient to use, the balance weight does not need to be added in the reverse direction of the working end, and the total weight of the machine is reduced.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system of a dual-purpose digging shovel capable of digging or shoveling. Background technique [0002] In the past, excavators and shovels had the following disadvantages when they were working: 1) Due to the limited operating conditions or the influence of the operating environment, they could not enter the site normally, resulting in project stagnation, such as high slope operations, marsh operations, and uneven road surfaces The situation is more serious, or when there are many large pieces of gravel, it is difficult for the excavator to perform mobile operations; 2) When the claws of the excavator are working, when digging hard ground, because the force distribution is uneven , it is easy to cause the main cylinder to break or the equipment to overturn; 3) Working in a high temperature environment, the operator is in a harsh environment, and the temperature of the hydraulic o...

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Problems solved by technology

[0002] In the past, excavators and shovels had the following disadvantages when they were working: 1) Due to the limited operating conditions or the influence of the operating environment, they could not enter the site normally, resulting in project stagnation, such as high slope operations, marsh operations, and uneven road surfaces The situation is more serious, or when there are many large pieces of gravel, it is difficult for the excavator to perform mobile operations; 2) When the claws of the excavator are working, when digging hard ground, because the force distribution is uneven , it is easy to cause the main cylinder to break or the equipment to overturn; 3) Working in a high temperature environment, the operator is in a harsh environment, and the temperature of the hydraulic oil will also rise with the temperature of the environment, causing the hose to expand and causing the system to leak oil , the hydraulic motor will also fail as the temperature of the hydraulic oil increases

In addition, at the site, excavation and shoveling operations are usually required, and the simultaneous operation of the two equipment makes a lot of noise. When the site is small, the excavator exits after the excavation operation is over, and the shovel enters the site for operation, and the two equipments enter the site in turn. The auxiliary production time is shortened, which affects the progress of the construction period; and the cost of using two equipment is high

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