Vertical deep well pump structural features

(A) the structure of vertical deep well pump Deep well pump device consists of pump working parts, pump tubes, drive shaft, pump base and drive motor (deep well pump with three-phase asynchronous motor) and other components for pumping deep groundwater. Submersible pump with its main difference is that the submersible pump is submerged motor and submersible pump directly assembled into units, or by the submersible motor shaft directly installed pump components to form a combination of pump products; and historical deep well pump device Of the motor and the pump are installed separately, the middle by a long axis together: the working components of the pump installed in the ground with a certain diameter of the well tube, which drives the motor - deep well pump with three-phase asynchronous motor installed in the well On the ground outside the tube, drive through the long axis. (B) the characteristics of vertical deep well pump vertical deep well pump is characterized by the Ministry of the outer diameter of the pump by the size of the strict restrictions, the pump is slender, the higher the lift, the more the pump series, the rated head change through the increase or decrease Pump series to adjust, this feature is similar to wells with submersible pumps. Its drive motor works on the ground, its outside diameter is not limited by the bore size, and it is not affected by well water. However, the power transmission between the motor and the working parts of the pump depends on the transmission of the multi-stage long axis, resulting in a large loss. When the pump working parts to install deeper, the shaft is very long (up to 80 ~ 100m above), the transmission shaft is very prone to failure. (C) the determination of the motor phase sequence and anti-reversing device As the vertical deep well pump pump and drive shaft are threaded connection, when the deep well pump is running normally (down from above the motor looking down as counterclockwise), the drive shaft and Tubing threads are tightened. However, when the deep well pump is installed and commissioning is completed, if the motor and power supply are connected in order to determine the phase sequence first, the steering of the motor may be reversed, causing a short reverse of the deep well pump start-up, And the pump tube connections have adverse effects; in deep well pump operation, when the pump from the normal operation into a stop state, the pump tube water column due to gravity down the flow of impact pump impeller, will make the deep well Reverse rotation of the pump, will also affect the drive shaft and pump pipe connection thread loosening, thus affecting the reliability of the threaded connection. To this end, in order to ensure the reliability of the pump pipe and drive shaft screw connection, in order to ensure the safety of deep well pump operation, anti-reversing device is installed on the upper part of vertical deep well pump motor to ensure deep well pump will not at any time Reversal, which fundamentally eliminates the possibility of loose screw connections.