Automotive Black Technology Chapter 685: : Zhengxin’s power solution!

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When Li Fanyu received the news from the final assembly that B-01 had killed the shaft connector of the transmission system during the first test, he also smiled bitterly.

Damn, the torque is too high, what should I do? I broke the shaft coupling directly and was very disappointed...

The engine has been built, why can’t I ask you to adjust the torque to a lower level?

But when he heard that he was asked to help design a transmission system matching B-01, he was happy,

This is an unexpected surprise!

I originally thought that a meal ticket of one engine would be enough, but now because the transmission of the fourth-generation main battle tank cannot match the powerful torque of the B-01, another transmission system was purchased.

Hehehehe...

This is the benefit brought by technological breakthroughs!

After taking over the design and development of the transmission system, the tank project has already undergone fundamental changes.

This is no longer simply to provide the engine assembly for the General Armament Department; B-01 plus the transmission system, these two parts completely contract the power system of the fourth generation main battle tank, which belongs to the fourth generation. Tanks provide a complete power solution!

In other words, once these two parts are solved, if the fourth-generation tank is mass-produced and installed, its power performance will all be attributed to Zhengxin.

This is awesome.

Not to mention how much this order is worth, just talk about the fact that a private enterprise provides power solutions for the army's new main battle tanks. Its symbolic significance and influence on Zhengxin domestically and worldwide are all It is immeasurable!

There are only a few companies with such capabilities in the world, and the sum total of the left and right does not exceed two slaps!

Thinking of this, Li Fanyu's eyes narrowed slightly...

Since the entire power solution has been handed over to Zhengxin, there is no point in keeping the existing fourth-generation tank transmission system secret from Zhengxin. Shortly after receiving the call, someone from Division 7 sent a hard drive containing all the design information for the existing transmission system.

After Li Fanyu browsed through it on the special computer provided by the Seventh Office, he couldn’t help but feel a toothache.

This old-fashioned transmission...can also be placed on a fourth-generation tank?

He didn't know that in fact, Lu Mingde handed over the transmission project to Zhengxin not just because the torque of the B-01 engine was too large and the existing transmission could not withstand this.

It is because of Zhengxin’s strong research and development capabilities in the development of Longxin B-01 that Lu Mingde has higher requirements for the fourth generation tank!

The causes of heart disease in Chinese tanks throughout the ages are not limited to the engine alone. The transmission system is also a flaw that has not been solved for a long time;

During the development of the third-generation main battle tank, the final assembly intended to introduce the LSG3000 transmission system produced by Germany's ZF. However, this transmission was to be used in weapons manufacturing, so at the last moment of the negotiations, the German government intervened, disrupting the cooperation. The previous related product imports and technology introduction were interrupted for a time, which led to the obstruction of the transmission equipment of the third-generation tanks.

In the end, the 850462 Scientific Research Institute stepped forward in times of crisis. In order to complete the third-generation tank project code-named 9910, Lu Mingde took the lead in gathering the backbone R&D forces of the scientific research institute to develop the transmission device of the third-generation tank.

But there was no particularly good solution at the time. The second-generation tanks at that time had been in service for more than fifteen years and were about to be replaced. The third generation is already ready to shoot. Time was tight and the task was heavy, so Lu Mingde had no choice but to improve the transmission device of the T-72 and came up with a set of mechanical star transmission devices that only had the performance of the second and a half generations.

This device still uses the traditional mechanical transmission structure of the old tank; the hydraulic control device, the transmission device consists of a transmission box, a side gearbox and a coaxial transmission. The engine torque is transmitted to the double-sided planetary gearbox through the fixed gearbox and drive shaft, and it also drives the compressor, starts the generator and fan.

The side gearbox has a planetary structure with a friction clutch, seven forward gears and one reverse gear, and is manually operated by hydraulic pressure.

How does such a transmission system operate?

In short – it’s better than nothing.

The technical basis of this power system is the T72 transmission system that the Soviet Union began to develop in 1967. Thirty years have passed since the Type 99 tank was developed.

Because of the old technology, the operation of this transmission system is very cumbersome. The driver has to frequently shift gears according to different driving conditions and terrain, and it is extremely laborious to control the direction of travel through two hydraulic pull rods, which consumes a lot of physical energy on the driver and makes him prone to mental fatigue.

But that's not all, the driver turns by changing the gearbox partner on the inside.

What form does this turn take?

That is, when the driver is in a tank position, he lowers the transmission gearbox on the steering side by one gear, so that the two tracks of the tank rotate at different speeds. The corresponding radius of steering is achieved based on the speed difference between the two crawler tracks.

What if the tank finds a cesspool in front of it while it is moving and wants to turn around?

You can’t rush this matter, you have to do it step by step.

First, the driver has to depress the brakes on both tracks and then pull back the control lever. Only by safely braking the track on one side and driving the track on the other side can the minimum radius steering of the tank be achieved with the braking track as the center.

How troublesome is this?

Therefore, it is generally easier for a tank driver to be promoted to a third-stage noncommissioned officer. This is not unreasonable. If a novice encounters a manure pit and cannot avoid it, he may just fall into it. Only an experienced driver can skillfully avoid it.

But even so, this transmission system has made great progress compared with the mechanical fixed-shaft transmission system on the Type 59 second-generation tank and the Type 96 second-generation semi-tank.

It was also the successful completion of the research and development of the transmission system of the Type 99 tank that this time the fourth-generation tank research and development task was won by the 85462 Research Institute.

And because there is no independent technology, the transmission system of the fourth generation tank has to be improved based on the Type 99. So what Li Fanyu saw was the same old-fashioned technology that changed the soup without changing the medicine.

Li Fanyu couldn't help but stand in awe after thinking about the achievements of Type 99 in the international tank competition.

But this respect is not dedicated to the tank, but to the driver!

Relying on the inherently weak 150HB engine and such a transmission system, Type 99 can achieve a pretty good ranking in international tank competitions...

Veteran drivers who went abroad to participate in competitions, you... have worked hard!

The transmission system of the tank is simple and simple. If he simply wanted it to withstand the powerful torque of the B-01, then Li Fanyu would not have to design it himself. He would only need to use the existing transmission system of the 850462 Research Institute. Just change its material to No. 5X aluminum alloy.

But it was obvious that he was not prepared to do this.

A good horse has a good saddle.

How can an engine with a horsepower of nearly 2,000 hp and a maximum torque of 7,000 Nm use such a backward transmission? !

After reading the information, Li Fanyu directly extracted the design drawings of the tank chassis and performance vehicle parameters from the hard drive with pen and paper, and returned the notebook and the hard drive to Wang Xiang.

Seeing that Li Fanyu not only returned his computer, but also took back the hard drive, Wang Xiang was puzzled;

"Director Li, this is for you as a reference for research and development. There is no need to send it back to me."

Li Fan smiled foolishly, "No need, I don't have any use for this thing."

"What's the matter? Do you think the encryption process is cumbersome? If you are not familiar with the operation, you can call me."

Li Fanyu shook his head, "That's not true, it's just that this transmission system is too old and has no reference value to me."

"..."

After saying this, Wang Xiang looked at him for a long time and hesitated several times, almost holding back internal injuries.

This transmission system took 850462 Research Institute more than half a year to optimize and improve!