Engineering vehicle hydraulic pump valve overall system

Abstract

The invention discloses an engineering vehicle hydraulic pump valve integrated system. The engineering vehicle hydraulic pump valve integrated system comprises a pump valve rear body which is formed in an integral-cast mode and is provided with a gear pump and a reversing valve body, the reversing valve body of the pump valve rear body is connected with an air cylinder body and is provided with a central spindle which can penetrate through the interior of the reversing valve body and the interior of the air cylinder body in a sliding mode, and the reversing valve body and the central spindle are arranged in a dynamic seal mode nearby the adjacent position of the air cylinder body and the pump valve rear body; oil inlet and oil returning openings are formed in the pump valve rear body, the oil inlet and oil returning openings are communicated to the reversing valve body through an oil returning channel, the oil inlet and oil returning openings simultaneously pass through the gear pump and are communicated to the reversing valve body through an internally-arranged oil inlet channel, the two channels and oil outlets formed in the pump valve rear body are respectively communicated to different cavities in the reversing valve body, the different cavities are combined with the position of the central spindle to form an inlet and outlet oil returning way of the integrated system, and an overflow valve is arranged on the internally-arranged oil inlet channel in a communicated mode. A hydraulic element and a control circuit are optimized, the oil supply efficiency is improved, the system pressure is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to an air-controlled reversing valve, which is mainly used for dump trucks, cranes, sanitation vehicles, tractors, engineering vehicles and engineering machinery thereof. Background technique [0002] Traditional engineering vehicle hydraulic and control systems are composed of hydraulic cylinders, gear pumps, relief valves, reversing valves, check valves, fuel tanks, oil supply pipelines, oil return pipelines and power connectors. The main disadvantages are scattered structure, low efficiency, large pressure difference, many connection points, many leak-proof points, high and complicated process and installation. Contents of the invention [0003] Aiming at the deficiencies in the above-mentioned prior art, the present invention aims to provide an overall hydraulic pump and valve system for engineering vehicles, which optimizes hydraulic components and control circuits, saves material costs, reduces fuel consumption and pressur...

AI Technical Summary

Problems solved by technology

The main disadvantages are scattered structure, low efficiency, large pressure difference, many connection points, many leak-proof points, high and complicated process and installation

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