| 摘要 |
The invention relates to mining and can be used for drilling blast holes in open pits and mines and also for driving technological holes, including drilling in complex-formation rock. The technical effect provides enlarging the service life of drilling tool owing to improving the efficiency and increasing the control speed of operating conditions during drilling process. It is characterized in that the machine for drilling wells comprises a housing, a rotational-feeding mechanism for a drilling string comprising coaxially located stator with coils, and a rotor with excitation windings installed inside the stator, the excitation windings are arranged inside the drill string and has a four-pole winding so that similar poles are located arranged along the drilling string and powered from DC supply through a collector and coils of stator winding, which interact with magnetic field of excitation winding, envelope the drill string circle with the excitation winding and are adjacent to two similar magnetic poles of excitation winding, arranged along the horizontal axis, thus forming minimum working air gap, and from two other similar magnetic poles, arranged along the vertical axis, windings are separated through the distance providing the weakening effect of fields in the given quarters of the excitation winding, besides, in the housing on both sides of the drill string there installed is additional stator containing the coils laid as bipolar coiling into two non-magnetic rotors, enveloping a quarter circle along the horizontal axis of the drilling string, thus forming the working air gap between the non-magnetic rotor and the drilling string. |
