Energy weapon having a fast start turbine for a high power generator

Patent metadata

Field	Value
Publication number	US-10429154-B2
Application number	US-201615250471-A
Country	US
Kind code	B2
Filing date	Aug 29, 2016
Priority date	Aug 29, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A system platform includes a gas turbine engine coupled to a high power generator. The high power generator, driven by the gas turbine engine, supplies power to high power subsystems of the platform.

First claim

What is claimed is:

1. A weapon system platform comprising:
a high-energy beam unit configured to discharge high-energy beams,
a gas turbine engine configured to provide power for the high-energy beam unit, the gas turbine engine including a first shaft coupled to a compressor and a high pressure turbine rotor, a second shaft concentric with and independently rotatable relative to the first shaft and coupled to a low pressure turbine rotor, a starter adapted to rotate the first shaft, and a combustor adapted to combine air received from the compressor with fuel and to burn the fuel to supply high pressure gasses toward the high pressure turbine rotor and low pressure turbine rotor to rotate the first and second shafts,
a generator coupled to the second shaft of the gas turbine engine and adapted to generate electricity when driven by the gas turbine engine,
an energy storage unit coupled to the generator and configured to store the electricity generated by the generator, and
a generator control system configured to selectively operate the starter and to selectively deliver fuel to the combustor such that the first shaft is continuously rotated by at least one of the starter and high pressure gasses from the combustor and the second shaft is selectively rotated by high pressure gasses from the combustor,
wherein fuel is selectively delivered to the combustor when a power demand signal of the high-energy beam unit is received by the generator control system, and
wherein fuel is selectively cut from the combustor when no power demand signal of the high-energy beam unit is received by the generator control system while the first shaft continues to be rotated by the starter in order to maintain a rapid-start mode of the weapon system platform.

2. The system platform of claim 1 , wherein fuel is selectively delivered to the combustor when an amount of electricity stored in the energy storage unit is below a threshold level.

3. A weapon system platform comprising:
a high-energy beam unit configured to discharge high-energy beams,
a gas turbine engine configured to provide power for the high-energy beam unit, the gas turbine engine including a first shaft coupled to a compressor and a high pressure turbine rotor, a second shaft concentric with and independently rotatable relative to the first shaft and coupled to a low pressure turbine rotor, a starter adapted to rotate the first shaft, and a combustor adapted to combine air received from the compressor with fuel and to burn the fuel to supply high pressure gasses toward the high pressure turbine rotor and low pressure turbine rotor to rotate the first and second shafts,
a generator coupled to the second shaft of the gas turbine engine and adapted to generate electricity when driven by the gas turbine engine,
an energy storage unit coupled to the generator and configured to store the electricity generated by the generator,
a generator control system configured to selectively operate the starter and to selectively deliver fuel to the combustor such that the first shaft is continuously rotated by at least one of the starter and high pressure gasses from the combustor and the second shaft is selectively rotated by high pressure gasses from the combustor,
a load shaft gearbox coupled to the second shaft and the generator, wherein the load shaft gearbox is configured to transfer rotation of the second shaft to the generator, and
an accessory gearbox engaged with the first shaft through a bevel gear and engaged with the starter such that the accessory gearbox is continuously driven by at least one of the starter and the first shaft to power one or more engine accessories;
wherein fuel is selectively delivered to the combustor when a power demand signal of the high-energy beam unit is received by the generator control system, and
wherein fuel is selectively cut from the combustor when no power demand signal of the high-energy beam unit is received by the generator control system while the first shaft continues to be rotated by the starter in order to maintain a rapid-start mode of the weapon system platform.

4. The weapon system platform of claim 3 , wherein the energy storage unit is a high power energy storage unit configured to power the high-energy beam unit, and wherein the generator is a high power generator configured to produce electricity to charge the high power energy storage unit during operation of the high-energy beam unit.

5. The weapon system platform of claim 4 , wherein fuel is selectively delivered to the combustor when the high-energy beam unit is operated.

6. The weapon system platform of claim 4 , further comprising a low power generator coupled to the load shaft gearbox and configured to generate electricity when driven by the gas turbine engine, and a low power energy storage unit coupled to the low power generator and configured to store the electricity generated by the low power generator.

7. The weapon system platform of claim 6 , wherein the starter is electrically connected to the low power energy storage unit.

8. A weapon system platform comprising:
a high-energy beam unit configured to discharge high-energy beams,
a gas turbine engine configured to provide power for the high-energy beam unit, the gas turbine engine including a first shaft coupled to a compressor and a high pressure turbine rotor, a second shaft concentric with and independently rotatable relative to the first shaft and coupled to a low pressure turbine rotor, a starter adapted to rotate the first shaft, and a combustor adapted to combine air received from the compressor with fuel and to burn the fuel to supply high pressure gasses toward the high pressure turbine rotor and low pressure turbine rotor to rotate the first and second shafts,
a generator coupled to the second shaft of the gas turbine engine and adapted to generate electricity when driven by the gas turbine engine,
an energy storage unit coupled to the generator and configured to store the electricity generated by the generator, and
a generator control system configured to selectively deliver fuel to the combustor when an amount of electricity stored in the energy storage unit is below a threshold level and selectively cut fuel from the combustor when the amount of electricity stored in the energy storage unit is above the threshold level and to selectively operate the starter such that the first shaft is continuously rotated by the starter when the amount of electricity stored in the energy storage unit is above the threshold level to allow the gas turbine engine to rapidly start with a re-application of fuel.

Assignees

• Rolls Royce Nam Tech Inc

Inventors

• Munevar Erik A

Classifications

• F01D19/00

  Starting of machines or engines; Regulating, controlling, or safety means in connection therewith (warming-up before starting F01D25/10; turning or inching gear F01D25/34) · CPC title

• F01D15/10

  Adaptations for driving, or combinations with, electric generators · CPC title

• F41H13/0043 Primary

  Directed energy weapons, i.e. devices that direct a beam of high energy content toward a target for incapacitating or destroying the target · CPC title

• F02C7/275

  Mechanical drives · CPC title

• F02C7/36

  Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user ({F02C3/107 - F02C3/13 and} F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H) · CPC title