IPC 7 English version F02C !A-F02C 9/58

F02C-F02C00958

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 02

COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

F 02 C

GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; fluidised bed combustion apparatus F23C 10/00; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B 11/00; using gas-turbine plants in vehicles, see the relevant vehicle classes)

Notes

(1)

This subclass covers:

–

combustion product or hot gas turbine plants;

–

internal combustion turbines or turbine plants;

–

turbine plants in which the working fluid is an unheated, pressurised gas.

(2)

This subclass does not cover:

–

steam turbine plants, which are covered by subclass F01K;

–

special vapour plants, which are covered by subclass F01K.

(3)

In this subclass, the following expression is used with the meaning indicated:

–

"gas-turbine plants" covers all the subject matter of Note (1) above and covers also features of jet-propulsion plants common to gas-turbine plants.

(4)

Attention is drawn to the Notes preceding class F01.

Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid (by the use of combustion products F02C 3/00, F02C 5/00) [3]

the working fluid being an unheated pressurised gas [3]

the working fluid being heated indirectly [3]

characterised by the type or source of heat, e.g. using nuclear or solar energy [3]

using reheated exhaust gas (F02C 1/08 takes precedence) [3]

Semi-closed cycles [3]

Closed cycles [3]

Gas-turbine plants characterised by the use of combustion products as the working fluid (generated by intermittent combustion F02C 5/00)

using exhaust-gas pressure in a pressure exchanger to compress combustion-air (pressure exchangers per se F04F 11/02)

having a turbine driving a compressor (power transmission arrangements F02C 7/36; control of working fluid flow F02C 9/16) [5]

045

having compressor and turbine passages in a single rotor (F02C 3/073 takes precedence) [3]

the compressor and the turbine being of the radial flow type [3]

055

the compressor being of the positive-displacement type [3]

the compressor comprising only axial stages (F02C 3/10 takes precedence) [3]

067

having counter-rotating rotors (F02C 3/073 takes precedence) [3]

073

the compressor and turbine stages being concentric [3]

the compressor comprising at least one radial stage (F02C 3/10 takes precedence) [3]

of the centripetal type [3]

with another turbine driving an output shaft but not driving the compressor

107

with two or more rotors connected by power transmission [5]

113

with variable power transmission between rotors [5]

having variable working fluid interconnections between turbines or compressors or stages of different rotors [5]

characterised by the arrangement of the combustion chamber in the plant (combustion chambers per se F23R) [3]

the combustion chambers being formed at least partly in the turbine rotor

using a special fuel, oxidant, or dilution fluid to generate the combustion products [3]

the fuel or oxidant being gaseous at standard temperature and pressure (F02C 3/28 takes precedence) [3]

the fuel or oxidant being liquid at standard temperature and pressure [3]

the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension

using a separate gas producer for gasifying the fuel before combustion [3]

Adding water, steam or other fluids to the combustible ingredients or to the working fluid before discharge from the turbine (heating of air intakes to prevent icing F02C 7/047) [3]

Inducing air flow by fluid jet, e.g. ejector action [3]

with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle [3]

Open cycles [3]

Gas-turbine plants characterised by the working fluid being generated by intermittent combustion

characterised by the arrangement of the combustion chamber in the plant (combustion chambers per se F23R) [3]

the combustion chambers being formed at least partly in the turbine rotor

the working fluid being generated in an internal-combustion gas generator of the positive-displacement type having essentially no mechanical power output (internal-combustion engines with prolonged expansion using exhaust gas turbines F02B)

the gas generator being of the free-piston type

the working fluid forming a resonating or oscillating gas column, i.e. the combustion chambers having no positively actuated valves, e.g. using Helmholtz effect [3]

using valveless combustion chambers [3]

the combustion chambers having inlet or outlet valves, e.g. Holzwarth gas-turbine plants

Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus (aspects predominantly concerning such apparatus, see the relevant classes for the apparatus); Adaptations of gas-turbine plants for special use [3]

Plural gas-turbine plants having a common power output [3]

Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output (F02C 6/18 takes precedence) [3]

providing compressed gas (F02C 6/10 takes precedence) [3]

the gas being bled from the gas-turbine compressor [3]

supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant [3]

Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure [3]

Gas-turbine plants having means for storing energy, e.g. for meeting peak loads [3]

for storing compressed air [3]

using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B 27/02) [3]

Adaptations of gas-turbine plants for driving vehicles [3]

Features, component parts, details or accessories, not provided for in, or of interest apart from, groups F02C 1/00 to F02C 6/00; Air intakes for jet-propulsion plants (controlling F02C 9/00) [3]

Air intakes for gas-turbine plants or jet-propulsion plants [3]

042

having variable geometry [3]

045

having provisions for noise suppression [3]

047

Heating to prevent icing [3]

having provisions for obviating the penetration of damaging objects or particles [3]

052

with dust-separation devices [3]

055

with intake grids, screens or guards [3]

057

Control or regulation (conjointly with fuel supply control F02C 9/50, with nozzle area control F02K 1/16) [3]

Arrangement of bearings (bearings F16C); Lubricating (of engines in general F01M) [3]

Heating air supply before combustion, e.g. by exhaust gases

by means of regenerative heat-exchangers

105

of the rotary type (rotary heat exchangers per se F28D) [3]

Cooling of plants (of component parts, see the relevant subclasses, e.g. F01D; cooling of engines in general F01P)

of fluids in the plant

141

of working fluid (F02C 3/30 takes precedence) [3]

143

before or between the compressor stages [3]

characterised by cooling medium

the medium being gaseous, e.g. air

Mounting or supporting of plant; Accommodating heat expansion or creep

Fuel supply systems

224

Heating fuel before feeding to the burner [3]

228

Dividing fuel between various burners [3]

232

Fuel valves; Draining valves or systems (valves in general F16K) [3]

236

Fuel delivery systems comprising two or more pumps [3]

Heat or noise insulation (air intakes having provisions for noise suppression F02C 7/045; turbine exhaust heads, chambers, or the like F01D 25/30; silencing nozzles of jet-propulsion plants F02K 1/00) [3]

Fire protection or prevention (in general A62) [3]

Starting; Ignition

262

Restarting after flame-out [3]

264

Ignition [3]

266

Electric (sparking plugs H01T) [3]

268

Starting drives for the rotor [3]

Fluid drives (turbine starters F02C 7/277) [3]

272

generated by cartridges [3]

275

Mechanical drives [3]

277

the starter being a turbine [3]

Arrangement of seals

Preventing corrosion in gas-swept spaces

Arrangement, mounting, or driving, of auxiliaries

Power transmission between the different shafts of the gas-turbine plant, or between the gas-turbine plant and the power user (F02C 7/32 takes precedence; couplings for transmitting rotation F16D; gearing in general F16H) [3]

Controlling gas-turbine plants; Controlling fuel supply in air-breathing jet-propulsion plants (controlling air intakes F02C 7/057; controlling turbines F01D; controlling compressors F04D 27/00) [3]

Control of working fluid flow (F02C 9/48 takes precedence; control of air-intake flow F02C 7/057) [3]

by bleeding, by-passing or acting on variable working fluid interconnections between turbines or compressors or their stages [3,5]

by throttling; by adjusting vanes [3]

by adjusting turbine vanes [3]

Control of the pressure level in closed cycles [3]

Control of fuel supply (F02C 9/48 takes precedence; fuel valves F02C 7/232) [3]

Regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed (F02C 9/30 to F02C 9/38, F02C 9/44 take precedence) [3]

characterised by variable fuel pump output [3]

characterised by throttling of fuel (F02C 9/38 takes precedence) [3]

Joint control of separate flows to main and auxiliary burners [3]

characterised by returning of fuel to sump (F02C 9/38 takes precedence) [3]

characterised by throttling and returning of fuel to sump [3]

specially adapted to the use of a special fuel or a plurality of fuels [3]

specially adapted for the control of two or more plants simultaneously [3]

responsive to the speed of aircraft, e.g. Mach number control, optimisation of fuel consumption [3]

Emergency fuel control [3]

Control of fuel supply conjointly with another control of the plant (with nozzle section control F02K 1/17) [3]

with control of working fluid flow [3]

by bleeding or by-passing the working fluid [3]

by throttling the working fluid, by adjusting vanes [3]

with power transmission control [3]

with control of a variable-pitch propeller [3]