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MAIN HYDRAULIC SYSTEM [14 records]

Record 1 2010-02-10

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
  • Aeronautical Engineering and Maintenance
OBS

auxiliary brake hydraulic power system operation. If ac power is not available for towing operation, the dc hydraulic pump(...) supplies hydraulic fluid under pressure to the brake accumulator for main landing gear wheel brake operation.

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Aérotechnique et maintenance

Spanish

Save record 1

Record 2 2008-11-06

English

Subject field(s)
  • Control Instrumentation (Mechanical Components)
  • Aircraft Systems
DEF

A pressure operated hydraulic cylinder used as a safety block for the main hydraulic system pressure in the event that a hydraulic hose or line should rupture downstream of the cylinder.

Key term(s)
  • lock-out actuator
  • lock out actuator
  • lockram
  • lock out cylinder

French

Domaine(s)
  • Dispositifs de commande (Composants mécaniques)
  • Circuits des aéronefs
OBS

vérin de blocage : terme uniformisé par les Comités d'uniformisation de la terminologie aéronautique (CUTA) Maintenance et Opérations aériennes.

Spanish

Save record 2

Record 3 2008-05-13

English

Subject field(s)
  • Aircraft Systems
  • Landing Gear (Aeroindustry)
OBS

Retractable landing gear may be retracted manually, electrically, or hydraulically. The main struts of retractable landing gear are mounted on trunnions and bearings so that they can easily be swung upward into the fuselage or wing. The retracting mechanism may be a jackscrew arrangement, an electric-motor-operated screw or gear system, or a hydraulic actuating cylinder connected to suitable linking devices.

OBS

Landing gear may be classified as either fixed or retractable, and it may also be classified according to arrangement on the aircraft. In this case we may say that the two principal arrangements are conventional and tricycle.

French

Domaine(s)
  • Circuits des aéronefs
  • Atterrisseur (Constructions aéronautiques)
OBS

rentrée du train : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

OBS

rentrée train : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.

Spanish

Save record 3

Record 4 2008-04-22

English

Subject field(s)
  • Aircraft Airframe
CONT

The main entrance door is the primary means of aircraft access for passengers and crew. It consists of a door structure and an attached folding stairway with hand rails. The door and stairway must be unlocked and pushed out to initiate a controlled free-fall to the extended position. During closing, the stairway is unlocked and the door is retracted upward and inward by hydraulic pressure from the Auxiliary(AUX) hydraulic system. The door and stair operation accommodates any combination of landing gear strut and tire inflation. Its use requires no ground support equipment.

French

Domaine(s)
  • Cellule d'aéronefs
CONT

La firme W... a conçu et réalisé un escalier escamotable en aluminium qui, homologué par la FAA, peut équiper les modèles d'avion B.707 [...] Comportant un système électrohydraulique qui assure son déploiement ainsi que l'érection et le verrouillage des mains courantes, cet escalier en trois parties ne pèse que 147 kg. Complètement replié, il mesure 80 cm de largeur [...]

OBS

escalier escamotable : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.

Spanish

Save record 4

Record 5 2008-04-22

English

Subject field(s)
  • Aircraft Propulsion Systems
CONT

The electrical system has four engine-driven generators, each powerful enough to supply the aircraft with sufficient electricity. Each of the two main landing gear pods carries an auxiliary power unit(APU) and air turbine motor(ATM) to supply electric/pneumatic and hydraulic power, respectively, for engine starts, ground air conditioning and heating, main landing gear kneeling operations, and forward/aft cargo door operations.

French

Domaine(s)
  • Propulsion des aéronefs
OBS

moteur à turbine à air; ATM : terme et abréviation uniformisés par les Comités d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes et Maintenance.

Spanish

Save record 5

Record 6 2008-04-17

English

Subject field(s)
  • Aircraft Systems
  • Landing Gear (Aeroindustry)
CONT

When the landing gear control lever is set to UP, hydraulic power furnished by the No. 1 hydraulic system ac pumps is routed through the landing gear selector and brake shutoff valve to the in-flight brake system, a manual shutoff valve, and then branches into the individual gear-up lines at the [main landing gear] hydraulic flow valve...

Key term(s)
  • landing gear-up line
  • gear up line

French

Domaine(s)
  • Circuits des aéronefs
  • Atterrisseur (Constructions aéronautiques)
OBS

conduite de rentrée train; conduite de rentrée train d'atterrissage : termes uniformisés par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

Spanish

Save record 6

Record 7 2008-04-10

English

Subject field(s)
  • Mechanical Transmission Systems
  • Aircraft Systems
DEF

A unit which converts pneumatic energy into mechanical energy.

CONT

The electrical system has four engine-driven generators, each powerful enough to supply the aircraft with sufficient electricity. Each of the two main landing gear pods carries an auxiliary power unit(APU) and [an] air turbine motor(ATM) to supply electric/pneumatic and hydraulic power, respectively, for engine starts, ground air conditioning and heating, main landing gear kneeling operations, and forward/aft cargo door operations.

French

Domaine(s)
  • Transmissions mécaniques
  • Circuits des aéronefs
DEF

Appareil transformant l'énergie pneumatique en énergie mécanique.

CONT

[Le Concorde] était l'un des rares avions à utiliser les inverseurs en vol. Ces coquilles servaient aussi à moduler le flux du réacteur. Ces inverseurs sont actionnés par un moteur pneumatique commandé par la manette inverseur de poussée situé en avant des manettes de poussée au poste de pilotage.

Spanish

Save record 7

Record 8 2008-03-25

English

Subject field(s)
  • Aircraft Systems
CONT

The pressure manifold conducts fluid from the hydraulic pumps to the selector valves. The pressure tank, pressure regulator, system relief valve, etc., are part of or auxiliary to the pressure manifold. It is the main line of the pressure side of the hydraulic system.

French

Domaine(s)
  • Circuits des aéronefs
OBS

rampe de distribution de pression : terme uniformisé par les Comités d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance et Opérations aériennes.

Spanish

Save record 8

Record 9 2008-02-06

English

Subject field(s)
  • Aircraft Airframe
CONT

The(Hydraulic) Service Center is an unpressurized compartment in the lower fuselage between the main landing gear wheel wells. System A and B components are on the LH [left-hand] sidewall and system C and D components are on the RH [right-hand] side. All reservoir and accumulator servicing can be performed within the center. Access to the center is through either of two doors at the forward or aft end.

Key term(s)
  • hydraulic service centre

French

Domaine(s)
  • Cellule d'aéronefs
OBS

compartiment hydraulique : terme uniformisé par les Comités d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes et Maintenance.

Spanish

Save record 9

Record 10 2005-04-05

English

Subject field(s)
  • Underground Mining
CONT

Paste backfill is defined as an engineered mixture of fine solid particles(with binder) and water, containing between 72% and 85% solids by weight. Particles in a paste mixture will not settle out of the mixture if allowed to remain stationary in a tank or in a pipeline. It can be placed in stopes with or without binder addition depending on the strength requirements for backfill. Improved pumping technology, environmental concerns and the need for a low cost/high strength fill in mines are driving mine operators to consider paste backfill as a tailings management and mine backfill alternative. The main advantages and disadvantages of a paste backfill system over a conventional hydraulic backfill plant are generally accepted as :... higher strengths can be achieved with an equivalent cement content; drainage of water and slimes from the fill are minimized, reducing the need for bulkhead construction and extensive drainage works. This feature also reduces maintenance on sumps and mine de-watering pumps; in some cases, unclassified tailings can be used to make paste rather than just the coarse fraction as is the case for hydraulic backfill; shorter stope cycle times can be achieved because an equivalent strength can be achieved in a shorter time with paste backfill; paste backfill systems achieve lower porosities than conventional fill thereby increasing the tonnage of material that can be disposed of underground; and, since paste backfill is deposited as a non-segregated mass of backfill(because cement particles are not displaced by the internal movements of the draining water), more predictable strength properties for the fill can be achieved.

CONT

Paste backfilling of mines. A number of mines are installing paste fill systems to replace the current sand fill method. The justification and economies of this conversion include: higher production levels (less wait for dewatering), increased grade of ore to the mill, decrease of stope ore left as pillars, improved haulage with the removal of excess moisture, increased filling rates, and a higher strength fill with less waiting time. The unique problems associated with paste fill applications range from extremely rapid system wear to paste separation and system blockage.

French

Domaine(s)
  • Exploitation minière souterraine
OBS

Remblayage à l'aide de pâtes minérales, remblayage où le matériau de remblai (aussi appelé «remblai» tout court) est constitué d'une pâte minérale. Propositions par inférence à partir des expressions «remblayage par terres d'apport» et «remblayage avec terres de lavoirs», relevées dans la justification reproduite ci-après.

OBS

Le remblayage consiste à remplir les vides créés par l'exploitation. Il a un rôle multiple : 1) Il sert de soutènement, les étais (métalliques en général) ne pouvant pas supporter tous les terrains sus-jacents. 2) Il améliore la ventilation. [...] Le remblayage peut se faire par terres d'apport prises sur place (terres de galeries ou terres de fausses voies) ou amenées de l'extérieur (remblayage pneumatique par exemple ou remblayage avec terres de lavoirs amenées du jour ou remblayage hydraulique) ou par foudroyage.

OBS

SNC-Lavalin est un chef de file des services à l'industrie minière, étant en mesure d'offrir toute la gamme des services à l'échelle mondiale : [...] Expertise : · Systèmes de remblayage (ce qui comprend la pâte).

CONT

Remblayage. «Rhéologie des pâtes minérales et son implication sur l'acheminement sous terre par pipeline», par Michael Li, Centre de technologie Noranda. Résumé. Le remblai en pâte est de plus en plus utilisé comme soutien pour les mines souterraines. Malgré cette tendance, l'ingénierie et la conception des systèmes de remblais en pâte sont grandement basées sur des méthodes empiriques plutôt que sur des principes scientifiques établis. Vu la faible compréhension de l'écoulement de la pâte minérale par plusieurs, il faut effectuer des essais empiriques lors de la mise en service et l'opération de nouveaux systèmes de remblais en pâte.

Spanish

Save record 10

Record 11 2001-10-17

English

Subject field(s)
  • Air Transport
  • Aeroindustry
DEF

A braking system which is independent of the main hydraulic system. It can be used to slow or stop the vehicle if the primary brakes fail, or to hold the vehicle stationary though the brake pedal is not depressed. It usually consists of a foot pedal or hand lever that actuates either front or rear brakes mechanically through a series of cables and linkages.

French

Domaine(s)
  • Transport aérien
  • Constructions aéronautiques

Spanish

Save record 11

Record 12 1992-07-02

English

Subject field(s)
  • Pumps
  • Construction Site Equipment
CONT

Performance terminology [of earth-moving machinery]... Hydraulic system. Working pumps. Type. Pump flow :..... at..... pressure at..... rated engine rpm. Main relief valve opening pressure.....

OBS

Term standardized by ISO.

French

Domaine(s)
  • Pompes
  • Matériel de chantier
CONT

Terminologie relative aux performances [des engins de terrassement] (...) Système hydraulique. Pompes motrices. Type. Débit de la pompe: ..... à la pression de ....., au régime nominal de ..... tr/min du moteur. Pression d'ouverture de la soupape principale de décharge: .....

OBS

Terme normalisé par l'ISO.

Spanish

Save record 12

Record 13 1983-02-09

English

Subject field(s)
  • Flight Controls (Aeroindustry)
OBS

Auxiliary [hydraulic power]. That portion of the system which is classified as auxiliary, emergency or standby, and which is used to supplement or take the place of the main hydraulic system.

French

Domaine(s)
  • Commandes de vol (Constructions aéronautiques)
OBS

Génération secondaire. Partie du système considérée comme circuit secondaire, de secours ou de détresse et qui sert à compléter ou à remplacer la génération hydraulique principale.

Spanish

Save record 13

Record 14 1980-07-25

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
OBS

when the landing gear control lever is set to UP, hydraulic power furnished by the No. 1 hydraulic system ac pumps is routed through the landing gear selector and brake shutoff valve to the in-flight brake system, a manual shutoff valve, and then branches into the individual gear-up lines at the [main landing gear] hydraulic flow valve(...)

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)

Spanish

Save record 14

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