Road roller open type vibration system with automatic frequency adjustment and single and double vibration functions

Abstract

The invention relates to a road roller open type vibration system with automatic frequency adjustment and single and double vibration functions. The system is characterized by comprising two parts, namely, a hydraulic loop part and an automatic control part, wherein the hydraulic loop part comprises a gear pump, a first electromagnetic valve, a safety valve, a first motor, a second motor and a second electromagnetic valve 6; and the automatic control part comprises a digital analog converter, a PID (proportion integration differentiation) controller, a first velocity sensor, a second velocity sensor and a comparator. According to the road roller open type vibration system with the automatic frequency adjustment and single and double vibration functions, the rear-wheel vibration frequency can be adjusted in real time according to changes of the front-wheel vibration frequency, so that the influence of a series connection hydraulic system on the operation comfort due to large difference of the front-wheel vibration frequency and the rear-wheel vibration frequency is effectively reduced, and the compactness and the flatness are effectively improved.

Description

technical field [0001] The invention relates to an open vibration system of a road roller with automatic frequency modulation and single and double vibration functions, and is mainly used in the open vibration system of a small road roller. Background technique [0002] At present, the vibratory hydraulic system of small double-drum rollers generally adopts a valve-controlled open system composed of vibratory pumps and front and rear vibratory motors connected in series. [0003] Due to the influence of the volumetric efficiency of the front and rear motors, the vibration frequencies of the front and rear motors are different. The vibrations generated by the two vibration sources at the front and rear of the whole machine are synthesized to form a periodic beat (that is, beating vibration). The beating vibration will affect the smoothness and smoothness of the road surface. Compactness and operating comfort. [0004] At the same time, conventional valve-controlled vibration...

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Problems solved by technology

[0004] At the same time, conventional valve-controlled vibration motors are connected in series, which can only achieve simultaneous vibration or simultaneous stop of the front and rear wheels. On a highly compacted road layer, the steel wheel on the compacted road layer will have a large jump from the ground, which will affect the compaction quality of the road surface of the other steel wheel, and the operating comfort is very poor.

This kind of working condition requires the front and rear steel wheels to be able to vibrate independently (that is, the single-vibration function), but the vibration system of the current road roller cannot realize this function.

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