EP0880003A2 - Closable ventilation grille for an armoured vehicle - Google Patents

Abstract

The grill covering the radiator of an armoured vehicle, which can be opened and closed, has two frames (7,8) where the blades (11,12) are aligned against each other in opposite angles (16,17) in cross section. The thickness (18) of the blades (11,12) on the dividing plane (15) is larger than the gap (19) to the next blade (11,12) in the same frame. In the open position, converging-diverging flow channels (22,23) are formed between the blades (11,12) aligned between each other in both frames (7,8).

Description

The invention relates to a closable cooling air grill for an armored vehicle consisting of two frames, one Have row of parallel slats, with a frame with respect the other in a division plane transverse to the direction of Slats is slidable.

For armored vehicles, the air inlet is for cooling and intake air usually arranged on the top surface of the tub. At the Entering a body of water from an embankment, at one buoyant armored vehicle also through swell, the Cooling air inlet flooded. Because such quantities from the bilge pump can no longer be managed, the air intake (also against shelling) protective grill previously closed will.

A generic cooling air grill, if not special for armored vehicles, is known from DE GM 74 21 585. By moving one frame, the slats of the both frames are made to match, according to the opened state. This is the free passage cross section a maximum of half the area of the frame. Since the grill in closed state must also be tight, is an overlap necessary, which means less than half when open Space is available. There is also a significant throttling effect occurs, the cooling air throughput is thus severely limited.

In addition, there is also a ballistic one for armored vehicles Protection required that does not allow a transparent grill. In addition, a low height is desirable, which is why well-known ones Folding blinds apart from their poor sealability are not suitable.

It is therefore an object of the invention to provide a cooling air grill that disturbs the cooling air flow as little as possible, good seals and is also bulletproof.

a) die Lamellen der beiden Rahmen im Querschnitt in entgegengesetzten Richtungen geneigt sind,

b) die Dicke der Lamellen in der Teilungsebene größer als der Abstand zur nächsten Lamelle desselben Rahmens ist und

c) im geöffneten Zustand zwischen den miteinander fluchtenden Lamellen der beiden Rahmen konvergent-divergente Strömungskanäle gebildet werden.

According to the invention this is achieved with the following features:

a) the slats of the two frames are inclined in opposite directions in cross section,

b) the thickness of the slats in the parting plane is greater than the distance to the next slat of the same frame and

c) convergent-divergent flow channels are formed in the open state between the mutually aligned lamellae of the two frames.

Due to the sliding frame, there are short actuation paths given, the inclined slats reduce the overall height and ensure bullet resistance, the thickness of the slats in the Partition level provides the sealing required Overlap. Because of the convergent-divergent flow channels however, the geometric cross-section reduction only leads to a slight decrease in the cooling air throughput.

Fig.1:

Eine teilweise Seitenansicht eines Radpanzers,

Fig.2:

Eine Draufsicht nach II in Fig.1,

Fig.3:

Einen Schnitt nach III-III in Fig. 2, stark vergrößert und in geschlossener Stellung,

Fig.4:

Wie Fig. 3, jedoch in offener Stellung.

The invention is described below with the aid of illustrations. They represent:

Fig.1:

A partial side view of a wheeled armor,

Fig. 2:

A plan view according to II in Fig.1,

Fig. 3:

A section according to III-III in Fig. 2, greatly enlarged and in the closed position,

Fig. 4:

As Fig. 3, but in the open position.

In Fig.1 and Fig.2 the tub is only partially shown Summarized with 1, the cannon 2 is dashed indicated. At the top of the tub is a cooling air grill 3 and if necessary, a further cooling air grill 4 is provided. One of both can serve as an outlet for the heated cooling air. Hereinafter only the first cooling air grill 3 is described.

The cooling air grill 3 is of a first frame 7 and one second frame 8 is formed, the frame 7 fixed to the Tub 1 connected and the frame 8 by means of fluid cylinders 9,10 Compatible with the first frame 7 in the vehicle transverse direction is. The two frames 7, 8 each contain parallel arranged lamellae 11, 12, which have a certain length over a long length Distances are connected by transverse slats 13.

In Figure 3, the grill 3 can be seen greatly enlarged. The first Frame 7 and second frame 8 are along a parting plane 15 slidable against each other. The second frame 8 has a collar 14 for stiffening. The first one 7 attached slats 11 close with the parting plane 15 an angle 16, the second slats 12 an angle 17. The thickness of the lamellae decreases away from the parting plane 15. The thickness 18 in the parting plane is greatest, on the outside End least. In this way, each slat has one approximately straight through the angle 16 or 17 to the parting plane 15 inclined back surface 20 and a curved abdominal surface 21. The distance 19 of the slats from each other in the division plane 15 is less than the thickness of 18 shown closed state the sealing overlap.

Fig. 4 shows the grill in the open position. Now ever form two adjacent slats 11 and 12 a flow channel, the from a convergent part 22 and a divergent part 23 exists if you assume the direction of flow 24. This form the flow channels causes the air in the convergent part accelerated and retarded in the divergent part; this results in the reduced clear cross section in the division plane 15 by temporarily increasing the speed compensated. This design also has the advantage that required deflection angle with a ballistic reasons large radius to cope, so that the throttle losses are low.

Claims (2)

Lockable cooling air grill for an armored vehicle, which consists of two frames which have a series of parallel slats, one frame being displaceable with respect to the other in a division plane transverse to the direction of the slats, characterized in that a) the slats (11, 12) of the two frames (7, 8,) are inclined in cross-section in opposite directions by an angle (16, 17), b) the thickness (18) of the slats (11, 12) in the parting plane (15) is greater than the distance (19) to the next slat (11, 12) of the same frame and c) convergent-divergent flow channels (22, 23) are formed in the open state between the mutually aligned lamellae (11, 12) of the two frames (76, 8). Cooling air grill according to claim 1, characterized in that the slats (11) of one frame (7) form an approximately right angle in cross section with the slats (12) of the second frame (8).

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