Pump and Electric Insulating Oil for Use Therein

Abstract

Embodiments of the invention provide a pumping system having a pump and a motor. The motor includes a lubricating oil composition, and more particularly, a low ash, sulfur, and phosphorous lubricating oil composition. The pumping system may further include a grounding ring disposed in the frame that is in communication with the motor. The motor may also include a cord cap assembly having a cord cap and a quick disconnect power cord.

1 . A submersible pump system, comprising:
 a pump in communication with a pump motor,   a frame designed to substantially enclose the pump and pump motor; and   a grounding ring disposed within the frame and in communication with the pump motor, the grounding ring including conductive filaments extending therefrom to draw currents away from bearings disposed within the frame.   
     
     
         2 . The submersible pump system of  claim 1  further comprising a drive shaft assembly coupled to the pump motor, the drive shaft assembly defined by a rotor extending through the frame and circumscribed by the grounding ring at a first end. 
     
     
         3 . The submersible pump system of  claim 1 , wherein the grounding ring includes a circular ring body that defines a centrally disposed opening circumscribed by an interior wall from which the conductive filaments outwardly extend. 
     
     
         4 . The submersible pump system of  claim 1 , wherein the conductive filaments include carbon fiber brushes for protecting the pump motor from damage caused by stray currents. 
     
     
         5 . The submersible pump system of  claim 1  further comprising a cord cap assembly extending upwardly from the frame, the cord cap assembly including at least one quick disconnect cord coupled to a cord cap, wherein the cord cap provides a connection between the pump motor and a power source. 
     
     
         6 . The submersible pump system of  claim 5 , wherein the at least one quick disconnect cord includes a power cord and a sensor cord. 
     
     
         7 . The submersible pump system of  claim 1  further comprising a controller in communication with the pump and the pump motor to control operation of the submersible pumping system. 
     
     
         8 . The submersible pump system of  claim 7  further comprising a seal leak detection system disposed within the frame, the seal leak detection system including at least one seal failure probe adapted to detect liquid intrusion into the frame and transmit an electrical signal to the controller to trigger at least one of a visual alarm and an audio alarm. 
     
     
         9 . The submersible pump system of  claim 1  further comprising a lubricating oil suitable for use in the pump and pump motor, wherein the lubricating oil includes a low ash, sulfur and phosphorous composition. 
     
     
         10 . The submersible pump system of  claim 9 , wherein the lubricating oil is characterized by a flash point of about 154° C. 
     
     
         11 . A submersible pump system, comprising:
 a frame defining an intake opening and an outlet opening;   a pump in communication with a pump motor and the intake opening and the outlet opening, the pump and the pump motor disposed within the frame; and   a cord cap assembly extending from the frame and including at least one quick disconnect cord coupled to a cord cap, wherein the cord cap provides a connection between the pump motor and a power source.   
     
     
         12 . The submersible pump system of  claim 11 , further comprising a grounding ring disposed within the frame and in communication with the pump motor, the grounding ring including conductive filaments extending therefrom to draw currents away from bearings disposed within the frame. 
     
     
         13 . The submersible pump system of  claim 12 , wherein the grounding ring includes a ring body that defines a centrally disposed opening circumscribed by an interior wall from which three conductive filaments outwardly extend. 
     
     
         14 . The submersible pump system of  claim 13 , wherein the conductive filaments include carbon fiber brushes for protecting the pump motor from damage caused by stray currents. 
     
     
         15 . The submersible pump system of  claim 11 , wherein the at least one quick disconnect cord includes at least one of power cord or a sensor cord. 
     
     
         17 . The submersible pump system of  claim 11  further including a controller having a variable frequency drive. 
     
     
         18 . The submersible pump system of  claim 11 , wherein the quick disconnect cord is coupled to a fitting that includes a pin. 
     
     
         19 . The submersible pump system of  claim 11 , wherein the quick disconnect cord is threadedly attached to the cord cap. 
     
     
         20 . A submersible pump system, comprising:
 a pump in communication with a pump motor;   a cord cap assembly extending from the pump motor and including at least one quick disconnect cord coupled to a cord cap, wherein the cord cap provides a connection between the pump motor and a power source; and   a grounding ring disposed in communication with the pump motor, the grounding ring designed to draw currents away from bearings associated with the pump motor.