Two-stage type torque-adjusting vibration exciter

Abstract

The invention discloses a two-stage type torque-adjusting vibration exciter. The two-stage type torque-adjusting vibration exciter structurally comprises a vibration exciter box body and torque-adjusting mechanisms which are arranged in the vibration exciter box body in a bilateral symmetry mode, wherein each torque-adjusting mechanism comprises a center shaft, static blocks, a movable block, a synchronous gear and a limiting pin shaft, the two ends of each center shaft are connected with the two side faces of the vibration exciter box body in a supporting mode through axial self-aligning bearings respectively, and the two static blocks are installed on the center shafts; the movable block is installed between the two static blocks, the synchronous gear is further installed on the center shaft on the outer side of the static block on one side, the two static blocks are fixedly connected with the synchronous gear through static block synchronous installation bolts, the two static blocks are connected through the limiting pin shaft, and a limiting pin shaft collision groove is formed in the movable block. The two-stage type torque-adjusting vibration exciter has the advantages that the center shaft is in a high-low two-stage eccentric torque state when rotating clockwise and anticlockwise, heavy-load low-frequency pile driving in a soft soil layer and small-load high-frequency pile driving in a hard soil layer are completed, static block eccentric keys are connected with the center shaft and arranged on the two sides of the movable block, the structure is stable, and the limiting pin and a movable block groove are limited through a molded surface to fix a rotating angle. The two-stage type torque-adjusting vibration exciter can be used for two or four eccentric gear occasions.

Description

technical field [0001] The invention relates to a two-stage torque regulating exciter, in particular to a two-stage torque regulating exciter for a hydraulic vibration piling hammer with adjustable eccentric moment, belonging to the technical field of pile machinery. Background technique [0002] Hydraulic vibratory piling hammer is a pile sinking and pulling construction machine widely used in various foundation construction projects such as urban construction, bridges, and ports. It is generally used in conjunction with cranes and pile frames. It is suitable for sinking and pulling operations of various steel sheet piles and steel pipe piles. It can also be used for various types of foundation operations such as concrete pouring piles, lime piles, and sand piles. The working principle of the pile hammer is: the pile hammer clamps the pile body for forced vibration, and the high-frequency vibration is transmitted to the soil layer in contact with the pile to cause changes i...

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Problems solved by technology

[0004] However, due to the uncertain working condition of the soil quality and soil layer, the excitation load in the prior art pile driver is generally fixed.

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