CPC Subclass Not Allocatable
F01D NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
Description
F01D covers non-positive-displacement turbomachines, primarily steam turbines and gas turbines, where fluid flow through rotating blades generates mechanical power without requiring positive displacement. This classification encompasses the design, construction, and operation of reaction and impulse turbines, including blade configurations, rotor assemblies, casing arrangements, and control systems. It applies to both stationary industrial turbines and mobile applications, but excludes positive-displacement engines (such as reciprocating engines covered under F01B) and compressors or pumps (classified separately in other sections).
13 direct subcodes
Child Classifications
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- F01D 1/00 Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K)
- F01D 11/00 Preventing or minimising internal leakage of working-fluid, e.g. between stages (sealings in general F16J )
- F01D 13/00 Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H)
- F01D 15/00 Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D 17/00 Regulating or controlling by varying flow (for reversing F01D1/30; by varying rotor-blade position F01D7/00; specially for starting F01D19/00; shutting-down F01D21/00; regulating or controlling in general G05 )
- F01D 19/00 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)
- F01D 21/00 Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D 23/00 Non-positive-displacement machines or engines with movement other than pure rotation, e.g. of endless-chain type
- F01D 25/00 Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D 3/00 Machines or engines with axial-thrust balancing effected by working-fluid
- F01D 5/00 Blades; Blade-carrying members (nozzle boxes F01D9/02); Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D 7/00 Rotors with blades adjustable in operation; Control thereof (for reversing F01D1/30)
- F01D 9/00 Stators