Electric Proportional Control System of Roller's Open Vibration

Abstract

The invention relates to an open type vibration electric proportional control system of a road roller, which is characterized in that the open type vibration electric proportional control system comprises a hydraulic system and an electric control system, wherein the hydraulic system comprises a fuel tank (1), a gear pump (2), an oil return filter (3), a control valve block (4), a gear motor (5) and an engine (9); and the electric control system comprises a vibration frequency sensor (6), a controller (7), a running speed sensor (8), an engine speed sensor (10), a throttle performer (11), a high-amplitude vibration proportion solenoid valve (12), a low-amplitude vibration proportion solenoid valve (13) and an amplitude selector switch (14). The open type vibration electric proportional control system of the road roller can implement stepless frequency modulation of the open type vibration system, makes the open type vibration system have soft vibration-starting and soft vibration-stopping functions, can raise compacting quality, can reduce system impact, can implement automation control by an electric control technology, and has advantages of stronger work condition adaptability and low cost.

Description

technical field [0001] The invention is an electric proportional control system, which is mainly used in the open vibration system of a road roller. Background technique [0002] At present, the vibration system of the road roller has an open vibration system and a closed vibration system. The open vibration system generally consists of a gear pump, a vibration valve, and a gear motor. The valve control loop is composed of a gear pump, a vibration valve, and a gear motor. The open system has a cost advantage, but it also has a quantitative system. Disadvantages such as small size and continuous decrease in volumetric efficiency. [0003] The closed vibration system adopts a pump control circuit composed of a variable displacement plunger pump and a quantitative plunger motor. The control mode of the variable displacement plunger pump is electronically controlled three positions. The closed system has the advantages of reliability, high efficiency and low noise, but at the sa...

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Problems solved by technology

[0003] The closed vibration system adopts a pump control circuit composed of a variable displacement plunger pump and a quantitative plunger motor. The control mode of the variable displacement plunger pump is electronically controlled three positions. The closed system has the advantages of reliability, high efficiency and low noise, but at the same time has high cost. , The disadvantage of strong maintenance professionalism

[0004] With the development of road roller technology and the further requirements of construction technology, the performance improvement of the vibration system needs to be injected with electronic control technology, but the above two systems can only control the electrical switching value, and cannot continuously change the linear control signal according to the input However, the injection of electronic control technology cannot realize functions such as soft start and soft stop, nor can it realize automatic control and intelligent control, resulting in poor adaptability of the road roller.

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