The long arm excavator is the main working tool of mechanical engineering. The transmission of engine vibration directly affects the reliability and service life of the whole machine. At the same time, the driver's ride comfort is worse and the working efficiency is reduced. Some effective methods must be taken to reduce the vibration.
First, the vibration source control is through the whole process of design, manufacture and even use, which is reflected in the improvement of the engine balance performance, the dynamic performance, the machining and assembly precision of the parts. There are various forms of engine vibration in the work. The main reasons are: the periodic movement of the engine center of gravity, the inertia force acting along the cylinder up and down, all the centrifugal inertia forces of the rotating parts, and the rotation of the crankshaft by the alternating action of the gas pressure.
Two, vibration isolation rubber isolation, the traditional engine adopts elastic support to reduce vibration, and the isolation device has the advantages of simple structure, low cost and reliable performance. Rubber bearings are usually installed on the frame. According to the force, they are divided into compression type, shear type and compression shear type. The compression structure is simple, easy to manufacture, widely applied, and is usually limited to vertical direction because of its high natural frequency.
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