Vibratory Hammer Adjustable Eccentric Moment Drive Unit

Abstract

The invention relates to a vibration hammer drive unit with eccentric torque adjustable. The vibration hammer drive unit with eccentric torque adjustable comprises a rotating shaft driven by a motor. The rotating shaft is sleeved with eccentric blocks which rotate synchronously, the eccentric blocks comprise the first eccentric block and the second eccentric block which are distributed in the circumferential direction, and the rotating shaft is further provided with a distance adjustment mechanism which is used for adjusting the distance between the first eccentric block and the second eccentric block in the circumferential direction. By the adoption of the mechanism, the vibration hammer drive unit with eccentric torque adjustable is high in starting speed, small in starting load and capable of avoiding mechanical resonance.

Description

technical field [0001] The invention relates to a vibratory hammer, in particular to an adjustable eccentric moment drive unit of the vibratory hammer. Background technique [0002] The vibratory hammer uses an electric motor or a hydraulic motor to drive the pair of eccentric blocks to rotate in opposite directions, so that the horizontal centrifugal forces generated by them cancel each other out, while the vertical centrifugal forces are superimposed on each other. Through the high-speed rotation of the eccentric wheel, the vibratory hammer shell produces a vertical up and down motion. Vibration, so as to achieve the purpose of pile sinking. [0003] The driving unit of a traditional vibratory hammer includes a rotating shaft driven by a motor, and an eccentric block is fixedly arranged on the rotating shaft. When the vibratory hammer is started, the motor needs to provide a large enough torque to overcome the gravity and eccentric torque of the entire eccentric block, inc...

AI Technical Summary

Problems solved by technology

[0003] The driving unit of a traditional vibratory hammer includes a rotating shaft driven by a motor, and an eccentric block is fixedly arranged on the rotating shaft. When the vibratory hammer is started, the motor needs to provide a large enough torque to overcome the gravity and eccentric torque of the entire eccentric block, increasing It reduces the starting burden of the motor and delays the starting speed of the vibrating hammer; secondly, there is a resonance frequency between the eccentric block and the rotating shaft, and the value of the frequency is affected by the shape and material, and the shape formed by the eccentric block and the rotating shaft generally does not Changes will cause the motor to start or shut down as the speed gradually increases or decreases. At a certain moment, resonance will be triggered to drive the vibrating hammer shell to produce severe vibration and noise, which will affect the surrounding working environment and staff, and also reduce Overall safety performance of vibratory hammer

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