The structure of the power head of hdd vise jaws tools is generally driven by a high-speed motor reducer, the reducer drives the power head, the drill rod is driven by the reducer output shaft, and the output shaft is hollow. The power head has the following functions: drive the drill pipe bit to turn; Withstand the reaction generated during drilling and backhauling; The passage of mud into the drill pipe.
At present, the power head structure of the domestic hdd vise jaws tools is basically the same, the difference is that the selection of the reducer is not the same: the same tonnage of hdd vise jaws tools can not select the exact same reducer, so the reduction ratio and performance parameters of the manufacturers have changed. The deceleration ratio of the power head is not the same: due to the change of the gear ratio of the reducer, the deceleration ratio of the power head is also changed. At present, the transmission modes of power head mainly include chain drive and gear drive; For example, the transmission mode of the power head of the CASE drilling rig is chain transmission: the advantages of chain transmission are simple structure and easy manufacturing, and the disadvantages are poor transmission balance, short life, and small output torque. The drive mode of the power head of the drilling rig is gear drive. The best points of gear transmission are transmission balance, long service life and large output torque; The disadvantage is that manufacturing requires high precision.
In addition, the power head push and pull device is the executive mechanism of the power head pull back or feed movement, which is generally driven by a pair of low-speed high-torque motors to drive a pair of reducer, driven by the reducer chain mechanism of the sprocket chain mechanism, and provided by the sprocket chain mechanism to the power head feed force or back tension. Power head push and pull device currently different manufacturers, such as DITCH WITCH company sprocket bar mechanism; The advantages of this mechanism are fast working speed, smooth working, compact structure and moderate cost. The disadvantage is that the force of sprocket chain is larger; Sprocket chain multiplier mechanism of CASE company; The advantage of the mechanism is that the force of the chain is half of the push and pull, and the work is stable; The disadvantages are slow working speed, large structure size and high cost; Domestic Langfang double cylinder mechanism. The advantage of the mechanism is that the drag force is greater than the drilling force, and the cost is low; The disadvantage is that the structure size is too large, the smoothness of the work is poor, the service life is low, and it can not be used for models with high automation requirements and self-walking.
hdd vise jaws tools https://www.uniquehdd.com/Vise-Jaws
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