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A constant-pressure pump controller system for maintaining a substantially uniform discharge pressure of liquid output from a pump operated by an electric motor and where liquid is delivered to a plurality of simultaneously-operating downstream outlets. The system provides a pressure transducer for

A constant-pressure pump controller system for maintaining a substantially uniform discharge pressure of liquid output from a pump operated by an electric motor and where liquid is delivered to a plurality of simultaneously-operating downstream outlets. The system provides a pressure transducer for sensing discharge pressure from the pump, and includes a piston bearing a magnet for Hall effect interaction. To accomplish Hall effect sensing, an electric current carrier is situated to interact with the magnet for production of Hall voltage which is monitored by a voltage sensor in communication with a controller that regulates motor speed in accord with Hall-effect sensed need through pulse width modulation in response to the voltage value according to proportional integral derivative methodology. Finally, a pump input voltage sensor and regulator maintain a constant voltage output to the pump should voltage input be variable.

대표청구항 ▼

A constant-pressure pump controller system for maintaining a substantially uniform discharge pressure of liquid output from a pump operated by an electric motor and where liquid is delivered to a plurality of simultaneously-operating downstream outlets. The system provides a pressure transducer for

A constant-pressure pump controller system for maintaining a substantially uniform discharge pressure of liquid output from a pump operated by an electric motor and where liquid is delivered to a plurality of simultaneously-operating downstream outlets. The system provides a pressure transducer for sensing discharge pressure from the pump, and includes a piston bearing a magnet for Hall effect interaction. To accomplish Hall effect sensing, an electric current carrier is situated to interact with the magnet for production of Hall voltage which is monitored by a voltage sensor in communication with a controller that regulates motor speed in accord with Hall-effect sensed need through pulse width modulation in response to the voltage value according to proportional integral derivative methodology. Finally, a pump input voltage sensor and regulator maintain a constant voltage output to the pump should voltage input be variable. ne blade of claim 8, further comprising an erosion coating disposed on and bonded to a portion of said pressure side not covered by said protective leading edge coating and a portion of said suction side not covered by said protective leading edge coating. 10. A hybrid turbine blade comprising: an airfoil portion comprising a composite section having a first density and a recess, said airfoil portion further comprising an insert section having a second mass density, which is less than said first mass density, wherein said insert section is disposed in said recess and bonded to said composite section, and wherein said composite section and said insert section together define an airfoil shape; and a protective trailing edge coating disposed on a portion of a pressure side and a portion of a suction side of said composite section along a trailing edge of said airfoil portion. 11. The hybrid turbine blade of claim 10, wherein an erosion coating is disposed on and bonded to a portion of said pressure side not covered by said protective trailing edge coating and a portion of said suction side not covered by said protective trailing edge coating. 12. A hybrid turbine blade comprising: an airfoil portion comprising a composite section having a first density and a recess, said airfoil portion further comprising an insert section having a second mass density, which is less than said first mass density, wherein said insert section is disposed in said recess and bonded to said composite section, and wherein said composite section and said insert section together define an airfoil shape; and a protective blade tip edge coating disposed on a portion of a pressure side and a portion of a suction side of said composite section along a blade tip edge of said airfoil portion. 13. The hybrid turbine blade of claim 12, further comprising an erosion coating disposed on and bonded to a portion of said pressure side not covered by said protective blade tip edge coating and a portion of said suction side not covered by said protective blade tip edge coating. 14. A hybrid turbine blade comprising: a shank portion; an airfoil portion comprising a composite section having a first density and a recess, said airfoil portion further comprising an insert section having a second mass density, which is less than said first mass density, wherein said insert section is disposed in said recess and bonded to said composite section, and wherein said composite section and said insert section together define an airfoil shape; an erosion coating disposed on and bonded to at least a portion of a pressure side and at least a portion of a suction side of said composite section; and a protective leading edge coating disposed on a portion of said erosion coating along a leading edge of said airfoil portion. 15. The hybrid turbine blade of claim 14 further comprising: a protective trailing edge coating disposed on a portion of said erosion coating along a trailing edge of said airfoil portion. 16. The hybrid turbine blade of claim 14 further comprising: a protective blade tip edge coating disposed on a portion of said erosion coating along a blade tip edge of said airfoil portion. 17. A hybrid turbine blade comprising: an airfoil portion comprising a composite section having a first density and a recess, said airfoil portion further comprising an insert section having a second mass density, which is less than said first mass density, wherein said insert section is disposed in said recess and bonded to said composite section, and wherein said composite section and said insert section together define an airfoil shape; an erosion coating disposed on and bonded to at least a portion of a pressure side of said composite section; and a protective leading edge coating disposed on a portion of said erosion coating along a leading edge of said airfoil portion and a portion of a suction side of said composite section. 18. The hybrid turbine blade