Compaction machinery is broadly categorized into vibratory compactors and impact compactors; they are primarily utilized for compaction tasks in trenches, corners, and various small-scale earthworks. Vibratory rammers are suitable for the compaction of non-cohesive soils, gravel, and crushed stone. The operating principle of a vibratory impact compactor involves an engine (or electric motor) driving a crank-connecting rod mechanism to generate a reciprocating vertical force, causing the compactor to lift off the ground. Under the combined influence of the force generated by the crank mechanism and the compactor's own weight, the compaction plate repeatedly strikes the material being compacted, thereby achieving the desired compaction effect. Vibratory impact compactors are available in two forms: internal combustion-powered and electric-powered; the former is driven by an internal combustion engine, while the latter is powered by an electric motor.
Structurally, both types consist of an engine (or motor), an excitation mechanism, a cylinder housing, and a compaction plate. Vibratory plate compactors utilize the vibrational energy generated by an exciter to perform compaction operations; they are widely employed in projects involving smaller work volumes or confined spaces. Vibratory plate compactors are classified into two types-non-directional and directional-and typically comprise an engine, a compaction plate, an exciter, and a spring suspension system.
Excavator-mounted vibratory compactors (such as the VC-D multi-functional hydraulic vibratory plate compactor and the VC-S hydraulic vibratory rammer) are driven by the excavator's hydraulic system. Characterized by high excitation forces and large amplitudes, these units can be used in conjunction with vibratory rollers and are suitable for compacting complex foundations involving flat surfaces, slopes, steps, and depressions. Their application areas include the compaction of building foundations, as well as the compaction of subgrades, ground surfaces, and backfill soil for water and sewage pipelines in municipal road engineering projects. They are particularly well-suited for the compaction of various slopes and embankments, as well as for compaction work at the abutment connections of highway bridges.
During the design phase, ease of maintenance must be a key consideration. The eccentric weight assembly requires periodic maintenance to prevent damage or scoring caused by the ingress of foreign objects, which could subsequently lead to excessive wear on the cylinder block and piston. During operation, dedicated matching hydraulic hoses must be used, and it is essential to ensure that both the hoses and their connectors remain clean whenever they are disconnected or reconnected. The gear oil should be replaced in a timely manner. Prior to installation, the hydraulic oil must be filtered, and the hydraulic oil tank should be thoroughly cleaned.
