Chapter 1021

"Chief, I have to try it myself." Seeing that Zhuang Jianye was happy, Lao Mou was not ambiguous, and the head of the headquarters was resolute.

Just now, Lao Mu has explained the subversive role of "bearingless helicopter hub" very clearly.

Different from the traditional helicopter hub, hydraulic cylinder and bearing are needed to connect the helicopter flight control system to realize the lateral and longitudinal deflection of the blade, so as to realize the helicopter steering.

The hub of bearingless helicopter completely abandons this complex mechanical structure, and adopts two different composite materials to realize the control of the helicopter blade with the flexible rotation force of the material itself and the liquid damper.

Its principle is similar to that of a elastic band with toughness. After it is stiffened, it can automatically return to its original state after releasing the hand.

Of course, the composite material on the helicopter hub is not as simple as the rubber band, but the basic principle is almost the same. The flexible resilience of the material itself is used to complete the transmission and recovery of control.

In this way, the hub of the helicopter can be more sensitive to receive the control commands from the pilot, and at the same time, it can quickly return to the original state or stabilize in the pilot's continuous state under the action of the material itself.

, in short, a cute fighter who can satisfy salt and sweet taste and what position he wants can be happy and even if the pilot is rude.

In contrast, the traditional mechanical hub with hydraulic bearing is not so intimate. Sometimes, when the pilot pulls up the control rod, the aircraft always needs a full second or two to react. The same is true when the plane wants to return to level flight. In addition to stabilizing the control rod, it also needs to make a slight downward balancing action. Otherwise, the hydraulic rod and bearing of the hub always do not react in time and can only be artificially applied It's an intervention.

In this way, the pilot's requirements are extremely high. At least one or two seconds in advance is required. Otherwise, if the helicopter is slow for one second, it is easy to have unpredictable problems. Especially in the battlefield, the enemy's missiles may come because of one or two seconds.

Pilots need to drive the hub of traditional hydraulic bearing helicopter in advance, not to mention the ground crew. With hydraulic pressure, bearing means complex mechanical structure, and complex mechanical structure means complex maintenance.

In fact, it is true that the hinge on the propeller blade, the bearing on the hinge, the hydraulic rod on the bearing, and the hydraulic rod connecting the bearing on the main frame of the hub

Every item needs to be checked, every item needs to be filled with special lubricating oil, and every item needs to be guaranteed to be safe. However, the mechanical structure inside each hydraulic bearing mechanical hub is the same as a honeycomb, which can make the intensive phobia patients directly numb their scalp and pass out.

So this kind of hub is not only the production trouble of manufacturing enterprises, but also the nightmare of ground crew.

Of course, this is not the most important. The key is that the weight of the hydraulic bearing mechanical hub itself is there. Even if the lightweight titanium alloy is used, the overall weight is about 600 kg, which is a good control. If Russia, for example, uses a large number of aluminum alloy and alloy steel, the weight of the whole hub will exceed 1 ton.

However, Lao maozi's solution to the problem is also simple and crude. Since the hub is heavy, increase the engine power and become a medium-sized helicopter carrying more people. For example, the Mi-17 is a typical representative of this idea.

The problem is that Lao maozi has many types of turboshaft engines, so there's no need to worry about the matching. But other countries are not so arrogant. Just imagine that a 4-ton helicopter has a 600 kg propeller hub with a bare head, leaving only about 3 tons of quota for other places. Even if the helicopter designer is driven crazy and forced to make a helicopter, there will be some problems in performance Sorry.

For example, when the cabin is manned, there is no way to hang materials from the belly.

For another example, the potential of aircraft modification is too small, the adaptive radar can not be installed on the hub of the helicopter, so that the helicopter has a higher battlefield perception ability, and so on

However, all this has become a thing of the past in front of the hub of shaftless helicopter. To say nothing else, the ground crew alone is just like a great blessing. Without the constraints of complex bearings and dense hydraulic rods, the ground crew only needs to do regular data monitoring on the composite materials of the hub and daily adjust the connection damper.

In this way, the workload is only about 25% of the previous workload, which not only allows the ground crew to spend more time on more critical maintenance, but also increases the helicopter attendance rate by 10%.

Don't underestimate the 10 percentage points. In emergency operations, let alone 10 percentage points, it is 11 percentage points. It is possible to save people from fire and water and win on the battlefield.

As for weight reduction, not to mention the fact that composite materials are originally lightweight materials, the bearing and two-thirds of the hydraulic rod are removed from the machine, and nearly 50% of the weight is lost at one time. If composite materials are also used for the blades, and the main reducer adopts the plate gear bearing integrated structure, the overall weight reduction effect will be more obvious.

So many hundreds of kilograms can be used as the load to realize the hybrid transportation task of 4-ton helicopter manned lifting, and also greatly expand the helicopter modification potential.No matter what else, take the mixed hoisting as an example, most of the transport modes are artillery units, which adopt the traditional hydraulic rod bearing hub and the traditional cylindrical bearing integrated main reducer for the 4-ton helicopter, although theoretically they can hoist the 86 type 122mm Howitzer with special weight reduction.

The problem is that it's not enough to put up a propaganda film or make a product introduction board. In fact, the real artillery can't see it at all.

The reason is very simple. It has no actual combat value, because the 4-ton light helicopter can't carry any artillery or ammunition except one gun.

They can only throw down the old bachelor's guns and turn over to pick up the artillery and ammunition; or two helicopters cooperate to lift the artillery and load the personnel and ammunition.

However, the cost performance and maneuverability are also very poor, and it is also easy to expose the target and be hit by the local government.

This is also the reason why the "air pickup" helicopter of Tengfei group failed to lift artillery in airborne exercises in the past few years. The reason is that the tactics are not flexible enough, and even the large caliber mortars can not be loaded in all directions, which makes the artillery feel very weak.

However, the 4-ton helicopter improved by "bearingless helicopter hub" and other technologies is different. Although it is also unable to load such a big guy as the 86 type 122mm howitzer, the mixed loading of the 86 type 120mm mortar with a total combat weight of 206kg can still be realized.

A five person artillery team sits in the engine room, 86 type 120mm mortars and a base number, a total of 10 120mm mortars are hoisted under the belly of the plane, and then the improved helicopter is used to easily excite any attack dead angle and launch an unexpected fire attack on the enemy.

Although the head of the headquarters is now leading the aerospace industry, he was baptized by the war of liberation in his early years. He was a valiant general who had been in Korea for three years. Of course, he knew what Lao Mu wanted to express. That is to say: such a helicopter has high tactical value!