Hydraulic system for tractor shared oil and tractor

Abstract

The invention provides a hydraulic system for a tractor sharing oil and a tractor and relates to the technical field of tractors. The hydraulic system for the tractor sharing oil comprises a double pump assembly, a working device subsystem, a turning subsystem and a transmission lubrication subsystem. Both an oil suction pipeline of the turning subsystem and an oil suction pipeline of the workingdevice subsystem communicate with the double pump assembly. A flow priority device is arranged in an oil return pipeline of the turning subsystem. The flow priority device is provided with a priorityopening and a bypass opening. Part of the oil in the oil return pipeline of the turning subsystem communicates with the transmission lubrication subsystem through the priority opening. The rest of theoil communicates with the double pump assembly through the bypass opening. According to the hydraulic system for the tractor sharing oil, the problem that deficiency of oil suction ability leads to unsteadiness of the system can be effectively solved; flow stability of the lubrication oil needed by a gearbox can be guaranteed; filling quantity of the oil in the gearbox can be lowered, and the oilis in the optimal height of transmission lubrication; the cost is lowered greatly; and lubrication transmission efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of tractors, in particular to a hydraulic system for common oil used by tractors and the tractor. Background technique [0002] With the upgrading of my country's tractor industry and the development of large and medium-sized tractor manufacturing technology, in order to improve transmission efficiency and save volume space, my country's tractors have begun to adopt a structure in which the gearbox and hydraulic oil tank are connected, that is, the transmission and hydraulic oil are shared. The common oil needs to meet the viscosity-temperature performance and cleanliness requirements of the working medium of the hydraulic system, and also needs to meet the lubrication function of the gearbox transmission system. [0003] At present, the hydraulic system using shared oil has the following technical difficulties: [0004] (1) The space structure is limited, the hydraulic pump is far away from the oil suction...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a tractor shared oil hydraulic system and the tractor, which can effectively solve the problem of system instability due to insufficient oil absorption capacity; can ensure the stability of the lubricating oil flow required by the gearbox; can reduce the oil flow in the gearbox Filling amount, so that the oil is at the optimum height for transmission lubrication, greatly reducing costs and improving lubrication transmission efficiency

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