IPC 6 English version F01D !A-F01D 25/36

F01D-F01D02536

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

F 01

MACHINES OR ENGINES IN GENERAL (combustion engines F 02; machines for liquids F 03, F 04); ENGINE PLANTS IN GENERAL; STEAM ENGINES

F 01 D

NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F 03; non-positive-displacement pumps F 04 D)

Notes

(1)

This subclass covers:

–

non-positive-displacement engines for elastic fluids, e.g. steam turbines;

–

non-positive-displacement engines for liquids and elastic fluids;

–

non-positive-displacement machines for elastic fluids;

–

non-positive-displacement machines for liquids and elastic fluids.

(2)

Attention is drawn to the Notes preceding class F 01, especially as regards the definitions of "reaction type", e.g. with airfoil-like blades, and "impulse type", e.g. bucket turbines.

Non-positive-displacement machines or engines, e.g. steam turbines (with working-fluid flows in opposite axial directions for balancing axial thrust F 01 D 3/02; with other than pure rotation F 01 D 23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F 01 K)

with stationary working-fluid guiding means and bladed or like rotor (F 01 D 1/24 takes precendence; without working-fluid guiding means F 01 D 1/18) [5]

traversed by the working-fluid substantially axially

traversed by the working-fluid substantially radially

having inward flow

having two or more stages subjected to working-fluid flow without essential intermediate pressure change, i.e. with velocity stages (F 01 D 1/12 takes precedence)

with repeated action on same blade ring

traversed by the working-fluid substantially radially

characterised by having both reaction stages and impulse stages

without working-fluid guiding means (F 01 D 1/24, F 01 D 1/32, F 01 D 1/34 take precedence) [5]

traversed by the working-fluid substantially axially

traversed by the working-fluid substantially radially

characterised by counter-rotating rotors subjected to same working-fluid stream without intermediate stator blades or the like

traversed by the working-fluid substantially axially

traversed by the working-fluid substantially radially

characterised by having a single rotor operable in either direction of rotation, e.g. by reversing of blades (combinations of machines or engines F 01 D 13/00)

with pressure/velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor

characterised by non-bladed rotor, e.g. with drilled holes (F 01 D 1/32 takes precedence; sirens G 10 K 7/00) [5]

using fluid friction

of the screw type [5]

Machines or engines with axial-thrust balancing effected by working fluid

characterised by having one fluid flow in one axial direction and another fluid flow in the opposite direction

axial thrust being compensated by thrust-balancing dummy piston or the like

Blades; Blade-carrying members (nozzle boxes F 01 D 9/02); Heating, heat-insulating, cooling, or antivibration means on the blades or the members

Blade-carrying members, e.g. rotors (rotors of non-bladed type F 01 D 1/34; stators F 01 D 9/00)

Annular blade-carrying members having blades on the inner periphery of the annulus and extending inwardly radially, i.e. inverted rotors [6]

for radial-flow machines or engines

Rotors for more than one axial stage, e.g. of drum or multiple-disc type; Details thereof, e.g. shafts, shaft connections

Heating, heat-insulating, or cooling means

Antivibration means

Blades (blade roots F 01 D 5/30; rotors with blades adjustable in operation F 01 D 7/00; stator blades F 01 D 9/02)

Form or construction (selecting particular materials, measures against erosion or corrosion F 01 D 5/28)

for counteracting blade vibration

Hollow blades; Heating, heat-insulating, or cooling means on blades

Specially-shaped blade tips to seal space between tips and stator

Blade-to-blade connections, e.g. by shrouding

using wire or the like

Antivibration means not restricted to blade form or construction or to blade-to-blade connections

Selecting particular materials; Measures against erosion or corrosion

Fixing blades to rotors; Blade roots

Locking, e.g. by final locking-blades or keys

Rotor-blade aggregates of unitary construction

Rotors with blades adjustable in operation; Control thereof (for reversing F 01 D 1/30)

having adjustment responsive to speed

Stators (non-fluid guiding aspects of casings, regulating, controlling, or safety aspects, see the relevant groups)

Nozzles; Nozzle boxes; Stator blades; Guide conduits

forming ring or sector

Fluid supply conduits to nozzles or the like

11/

Preventing or minimising internal leakage of working fluid, e.g. between stages (sealings in general F 16 J)

11/

by non-contact sealings, e.g. of labyrinth type (for sealing space between rotor blade tips and stator F 01 D 11/08)

11/

using sealing fluid, e.g. steam

11/

Control thereof

11/

for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F 01 D 5/20)

11/

using sealing fluid, e.g. steam

11/

using a rubstrip, e.g. erodible, deformable or resiliently biased part [6]

11/

Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing (rotors with blades adjustable in operation F 01 D 7/00) [6]

11/

by self-adjusting means (F 01 D 11/12 takes precedence) [6]

11/

using stator or rotor components with predetermined thermal response, e.g. selective insulation, thermal inertia, differential expansion [6]

11/

Actively adjusting tip-clearance [6]

11/

by mechanically actuating the stator or rotor components, e.g. moving shroud sections relative to the rotor [6]

11/

by selectively cooling or heating stator or rotor components [6]

13/

Combinations of two or more machines or engines (F 01 D 15/00 takes precedence; combinations of two or more pumps F 04; fluid gearing F 16 H; regulating or controlling, see the relevant groups)

13/

Working-fluid interconnection of machines or engines

15/

Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby (regulating or controlling, see the relevant groups; aspects predominantly concerning driven devices, see the relevant classes for the devices)

15/

Adaptations for driving vehicles, e.g. locomotives (arrangement in vehicles, see the relevant vehicle classes)

15/

the vehicles being waterborne vessels

15/

Adaptations for driving, or combinations with, hand-held tools or the like

15/

Adaptations for driving, or combinations with, pumps

15/

Adaptations for driving, or combinations with, electric generators

15/

Combinations with mechanical gearing (driven by multiple engines F 01 D 13/00)

17/

Regulating or controlling by varying flow (for reversing F 01 D 1/30; by varying rotor blade position F 01 D 7/00; specially for starting F 01 D 19/00; shutting-down F 01 D 21/00; regulating or controlling in general G 05)

17/

Arrangement of sensing elements (sensing elements per se, see the relevant subclasses)

17/

responsive to load

17/

responsive to speed

17/

responsive to condition of working fluid, e.g. pressure

17/

Final actuators (valves in general F 16 K)

17/

arranged in stator parts

17/

varying effective cross-sectional area of nozzles or guide conduits

17/

by means of nozzle vanes

17/

varying effective number of nozzles or guide conduits

17/

Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted (sensing elements alone F 01 D 17/02; final actuators alone F 01 D 17/10)

17/

the operation or power assistance being predominantly non-mechanical

17/

electrical

17/

fluid, e.g. hydraulic

19/

Starting of machines or engines; Regulating, controlling, or safety means in connection therewith (warming-up before starting F 01 D 25/10; turning or inching gear F 01 D 25/34)

19/

dependent on temperature of component parts, e.g. of turbine casing

21/

Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for

21/

Shutting-down responsive to overspeed

21/

responsive to undesired position of rotor relative to stator, e.g. indicating such position

21/

Shutting-down

21/

Restoring position

21/

responsive to unwanted deposits on blades, in working-fluid conduits, or the like

21/

responsive to temperature

21/

responsive to other specific conditions

21/

Trip gear

21/

involving hydraulic means

21/

Checking operation of shut-down devices

23/

Non-positive-displacement machines or engines with movement other than pure rotation, e.g. of endless-chain type

25/

Component parts, details, or accessories, not provided for in, or of interest apart from, other groups

25/

De-icing means for engines having icing phenomena

25/

Antivibration arrangements

25/

for preventing blade vibration (means on blade-carrying members or blades F 01 D 5/00)

25/

Cooling (of machines or engines in general F 01 P); Heating; Heat insulation (of blade-carrying members, of blades F 01 D 5/00)

25/

Heating, e.g. warming-up before starting

25/

Cooling

25/

Casings modified therefor (double casings F 01 D 25/26)

25/

Arrangement of bearings; Supporting or mounting bearings in casings (bearings per se F 16 C)

25/

Lubricating arrangements (of machines or engines in general F 01 M)

25/

using lubrication pumps

25/

using working fluid or other gaseous fluid as lubricant

25/

Casings (modified for heating or cooling F 01 D 25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F 16 M)

25/

Double casings; Measures against temperature strain in casings

25/

Supporting or mounting arrangements, e.g. for turbine casing

25/

Exhaust heads, chambers, or the like

25/

Collecting of condensation water; Drainage

25/

Turning or inching gear

25/

using electric motors