Refill the hub units of the system and their types
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Refill the hub units of the system and their types

Refill the hub units of the system and their types

 

This section presents the main types of filling machines. Note that the master node is a centralized filling module. There are few options for that module. It allows you to fill up 4 m3 in a minute. This restriction is introduced for several reasons: limited charging rate and the maximum capacity of the filling equipment (water hammer) The speed refueling VS fuel limited by the rules of safety. Fuel (TC-1, the TS-2, A-1, Jet-A1 et al.) Are insulators and can accumulate static electricity during flow through the hose, and at the time of filling cause a spark, which could ignite the fuel and explode it vapors.

For modern fuels, the filling speed (flow through the fuel hose) is up to 2 m / s. The fuel industry proposed a way to solve the problem: to use special antistatic additives in the fuel. The use of additives allows to increase the speed of fueling up to 5 m / s. Such additives (for example, ASP-1/2/3) are added to the fuel immediately before the sale (delivery) of the fuel from the processing plant to the airport's fuel and lubricants complex.

 

the hub system

Fig. 1 Functional diagram of the hydrant filling system: 1 - supply tank, 2 - gate valve, 3 - pipeline, 4 - filter mesh, 5, 8, 10 - pressure gauge, 6 - pressure relief safety valve, 7 - pump, 9 - valve, 11 - coarse filter, 12 - filter separator, 13 - hydraulic shock absorber, 14 - rubberized hose, 15 - connecting device, 16 - PVC liquid supply valve, 17 - Manometer, 18 - PVCL liquid tank, 19 - PVCL liquid filter, 20 - supply tank, loading valve, 21 - hydrant pit, 22 - filling unit; 23 - plane.

 

The aircraft hydrant filling system (TsZSVS) is a complex system of pipelines and fuel lines with many control units and pumping systems. 

The general structure of the centralized system of refueling Sun presented above (Ris.№1). In this paper, according to the task, it will be considered charging unit.

 

Filling machines

Figure 2 - A general view of a mobile refueling unit mounted on the vehicle

1 - filter-water separator; 2 - hose reel; 3 - distributing sleeves; 4 - counter dispenser; 5 - flow regulator.

 

Above is a general view of the filling unit of the central gas station system (Fig. No. 2). Refueling is carried out as follows: A refueling unit approaches the aircraft parked in a parking lot equipped with a fuel hydrant. One sleeve is connected to the hydrant, which is located under the apron, closed by a hatch. Further, the dispensing sleeve is connected to the corresponding aircraft refueling socket. Refueling can be carried out both open and closed. Then the pump turns on and the fuel supply to the aircraft starts.  As a rule, located on the platforms of the two columns to be able to fill all kinds of aircraft. For the option of HRT provides two types of fuel column installed on each variety.

Installation for parking two audio speakers are arranged symmetrically on the right and left sides, a distance 9 m from the longitudinal axis of the aircraft and 6 m from the axial line of the main chassis in the direction of the plane. When installing audio speakers last located right of the longitudinal axis of the aircraft on the above distances. It should be borne in mind that in all cases the columns to be placed behind the projection plane and the contours of possible paths of the aircraft is on the taxiways.

Hydrant column should not interfere with maneuvering the aircraft and mobile means of ground support, so they are placed on MS and fueling apron recessed flush with covered parking in a metal casing. The general structure of the hydrant column shown in Fig. 3

 

filling equipment

1 - well; 2 - locking handle; 3 - centering handles; 4 - cover; 5 - drain valve; 6 - an adjusting screw; 7 - hydrant regulator; 8 - outlet branch pipe; 9 - oil seal; 10 - seal; 11 - control knob; 12 - adjusting screw for the emergency shutdown of the hydrant; 13 - valve for setting the valve closing time; 14 - plug of the pilot device; 15 - control mechanism; 16 - valve of the control mechanism; 17 - locking screw; 18 - hydrant cover

 

For this purpose, the cover is provided with a mounting aperture sizes 3h3 m. To prevent rainwater and meltwater body column sealed lid 4 with rubber O-ring. Gland 9 device prevents the penetration into the body of groundwater. A column cover hydrant calculated strength, the maximum specific load pressure operated aircraft reaching 12 kgf / cm2.

Availability column hydrant control type RG-03 can automatically maintain a preset pressure at the outlet of the column and produce automatic shutoff of fuel as it passes through the column more fuel than specified adjustment, as well as in emergency situations (at breakage of the sleeve at the filling unit, etc. .).

 

Specification hydrant regulator RG-03

Setting range adjustable pressure, kgf / cm2

minimum 2, 8 maximum

 

Capacity, m3/ h

Minimal 30, 150 maximum

Maximum pressure, kgf / cm2 

16

 

The RG-03 hydrant regulator (Fig. 4) is a direct-action pressure regulator of the “after itself” type with a vertical fuel flow and at the same time a device that automatically closes the supply pipeline with a special valve, which moves by the energy of the fuel flow at excessively permissible flow rates for it. It includes three main elements: shut-off, control valves and a switchgear. 

 

Hydrant control 3

Figure 4 - hydrant regulator RG-03

Currently, the new domestic and foreign speakers used HRT various modifications mainly produced in Europe and the US such firms as "Zenith" and "Carter". Typical layout of the equipment in the new hydrant column modifications (on the recommendations of IP) is given in Fig. 5.

 

foreign HRT

Figure 5 - Typical layout of equipment in a hydrant column shaft type

1 - penstock; 2 - shaft diameter hydrant box 46 cm; 3 - reverse (isolation) valve with manual or remote control; 4 - additional mesh 20-micron filter; 5 - flow control and pressure; 6 - hydrant nozzle diameter mm 102, 7 - -gidrantnaya clutch diameter 102 mm; 8 - fuel hose; 9 - laying; 10 - gravel cushion; 11 - concrete pad; 12 - air duct

 

In the hub system used mobile and stationary filling units. Using mobile filling units due to the fact that the use of stationary units require large amounts of expensive equipment, the utilization of which, in numerous places of parking is low. Therefore, at airports with a large number of aircraft parking apron used primarily mobile refueling units. If the number of parking places is small, and the load factor is high enough, it is advisable to use a stationary fueling aircraft fuel.

Select the type of unit grounded technical and economic calculations and depends on the traffic of aircraft types serviced aircraft refueling operations in the duration of parking spaces, parking spaces purpose, which is done loading, the number of parking places served by fixed means of refueling and the existing filling equipment.

The number of fixed units is determined by the number of parking places, the hub served by the system, the rate of one unit for each berth. If you want to be placed on a parking lot of two units. Equipment mobile refueling units mounted on the chassis of cars, trailers and special trucks. The latter may be self-propelled and trailed.

To the airportah with great intensity sorties used machines mounted on vehicles; trailed machines used in airports with low intensity. Almost all filling units have the same flowsheet (ris.№6).

 

Drawing 6- Process flow diagram of a mobile refueling unit

The mobile refueling unit is connected to the hydrant (connecting) column of the DZS system by means of a receiving arm 2 with a diameter of 100 mm and a length of 7-7,5 m, and to the aircraft side fittings with two or one 14 dispensing hose. The connection of the receiving hose to the column and the dispensing hoses with closed fueling to the fuel system of the aircraft is carried out with the help of quick connectors 1 and 15. As such connections on the dispensing hoses are used tips for closed refueling type NNZ or manufactured by normal MAP 2561A. With open fueling on the dispenser sleeves, instead of handpieces for closed filling, distributing cranes of the RP-40 type are installed. After the hoses are connected, the fuel dose necessary for refueling is installed on the 9 dispenser, the hydrant column valve and the valve installed at the inlet to the refueling unit are opened.

Fuel pressurized by the sleeve 2 enters the filter-water separator 4, then stream it is distributed in two separate communications, in which is set the same equipment: a pressure regulator 5, an air 6, counter dispenser 9, flow regulator 11, venturi 12 dispensers sleeve 14. Communication can work together- and separately.

If necessary add to the anti-icing liquid fuel during refueling 8 valve opens, and fluid from the reservoir starts flowing 7 10 the dispenser, which is at a predetermined ratio injects liquid fuel into a stream going to a gas station. Once over the counter dispensing a predetermined amount of fuel to be held on the issue, the counter automatically stops refueling. Then close the valve and hydrant column disconnected hose filling unit.

Upon completion of filling performed suction of fuel dispensing hose in the drain tank by a pump 16 17. If the drain tank is full, the fuel from it can be pumped into the tank of another aircraft or tank truck. Pumping of fuel from the tank is made pump unit or a special device.

On the mobile refueling units are installed special countable metering devices such as UMTS, USDT and 86-3-02k. The desired mode of supply of fuel at a gas station is provided with a pressure regulator and flow 5 11.

Depending on the type of aircraft powered with total capacity of filling machines can be: two dispensing hose from the 700 4000 to l / min, and in one arm of the 300 2000 to l / min. The pressure at the inlet of the filling unit must be 7-8 kgf / cm2And the output 2-4 kgf / cm2.

Fig. 7 shows a mobile refueling unit, mounted on a special trolley. It performs the same operations as discussed above charging unit. Such trailer devices leverage at the airport with a large flow coefficient and refueling. Such units, for example, can be used to fuel large aircraft (An-124, An-225, Boeing -747/767/777, AND-380/340), fuel tanks which can accommodate more than a hundred tons of fuel. It is most advantageous to operate them in conjunction with a self-propelled filling unit as part of a road train. So, refueling will be performed immediately on both sides of the aircraft, which can reduce the time required for refueling a particular aircraft and bring profit from flight operations.    

 

Figure 7 - A general view of the charging unit mounted on a trolley

1 - receiving sleeve with a tip; 2 - housing; 3 - control panel; 4 - counter

 

 

Refueling the aircraft. Airport refueling equipment.

CZ 1 M 

TSZT 4 (4M / 4M2)

MAN TGL 8.150 4x2 Euro3 

Petrol Renault

MAZ 4370 mobile unit 

Military refueling unit Peugeot

FOR TSZSVS system Mercedes

Avia.pro

 

 

 

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