The transmission system of a tank is not a grade compared to a car. Pen, fun, pavilion www. biquge。 infoCompared with the transmission system of automobiles, the technical content of this game is much higher.

In the final analysis, the speed change of the car is just to use the change of the gear ratio to make the transmission shaft get different torque and power. But the drivetrain of a tank is more complicated, and it is not only a matter of varying power and torque.

The car is steered by the front wheels, but the tank is not!

The steering of the tank is carried out by using the speed difference between the two tracks, so the transmission system not only assumes the responsibility of changing speeds, but also assumes the function of steering.

If you start to design such a transmission system at the level of Li Fanyu, it may be difficult to climb to the sky. But with design expertise, he is completely confident!

After thinking about the information in his heart, and checking the current more advanced tank gearbox design concept on the Internet, Li Fanyu came to the R&D center.

Here, Wang Yu was starting to conduct an environmental test on the B-01, and when he heard that Li Fanyu was going to build a supporting transmission system, he was also a little excited. However, the temporary team is already limited in number and is busy with various tests, so it is impossible to take out for the time being.

In view of this situation, Li Fanyu discussed with the people in the seventh department, and prepared to set up a separate team to take the lead in the design and development of the transmission system.

This is also to consider the completion of the whole set of solutions in the shortest possible time, so there is no reason to disagree with the seven.

When he learned that Li Fanyu was going to allocate manpower to develop the key parts of the fourth-generation tank project again, Liu Qing didn't say a word, and directly hugged Li Fanyu's thigh.

"Brother Fan, I beg you, let me go!"

"Hold the grass, you get up!" Li Fanyu shook his thighs and hung Liu Qing directly from the ground.

"I don't, Brother Fan, I promise not to leak secrets, give a chance, give a chance!"

"Poof, ahem...... Brother Fan, look at his bear-like appearance, he has been going crazy for the past few days. Aoko's team is still okay in the gearbox, so you can let him go. ”

Xu Fufang looked at this thing hanging on Li Fanyu's lap like a monkey, couldn't help laughing, and coughed lightly.

Li Fanyu was helpless, as long as he looked down at the teary-eyed goods on his lap: "Can you really guarantee that you will keep your mouth shut and not leak secrets?"

"Definitely!"

"Okay, then I'll give you a chance. ”

"Hold the grass, thank you Brother Fan, I love you to death!"

"Don't be in a hurry to love me yet, I'll test you. ”

"You say!"

A wicked smile suddenly appeared on Li Fanyu's face, "You go downstairs to find people from the seven places and memorize the confidentiality rules for me." ”

Hehe......

"Huh?"

Hearing that it was this test, Liu Qing's face collapsed......

Half an hour later, a strange guy stood in the lobby on the second floor of the R&D center. While walking towards Li Fanyu's office, he muttered something with words in his mouth;

"Don't tell secrets that shouldn't be told. Don't ask for secrets that shouldn't be asked. Don't look at the secrets that shouldn't be seen. Don't bring the secrets you shouldn't bring. Do not involve secrecy in private correspondence. Secrets are not ..... recorded in a non-confidential book. Do not read or talk about secrets in non-confidential places. Do not copy, preserve or destroy secrets without permission. Do not bring secret carriers to visit relatives, friends, and travel. Hey, it's like nine, which one is missing the grass......"

……

After checking the information on the Internet for a whole day, Li Fanyu already had a rough idea in his heart.

In view of the shortcomings of the mechanical transmission system originally equipped with the fourth-generation tank, which was cumbersome to operate and inflexible steering, Li Fanyu decided to design a set of comprehensive transmission devices that relied on hydraulic power and added a stepless steering system. This allows the tank to theoretically have better agility and operate without the hydraulic lever in favor of a more flexible steering handle or steering wheel.

With this general direction, he will find Liu Qing and the team to start the design together.

In just ten days, Zhengxin's tailor-made automatic transmission system for the fourth-generation main battle tank came out.

The new transmission system abandons the original mechanical transmission mode and adopts a large number of hydraulic devices. The main part is composed of a fully automatic hydromechanical integrated transmission device and a continuously variable hydraulic speed system.

This hydraulic force, in fact, is not difficult in principle;

In a pump, three impellers are set, one of which is connected to the engine and is responsible for outputting power, which is called a pump wheel. One is connected to the output shaft and is responsible for transmitting power, called a turbine. There is also a guide wheel that is responsible for mediating the output between these two impellers.

The engine's flywheel drives the pump wheel to rotate, pushing the pump oil to the turbine to rotate under hydraulic action.

It's like two fans, facing each other. When one fan is turned on, it will blow another fan to rotate. The guide wheel in the middle is to adjust, which can enhance or weaken the hydraulic pressure of the pump wheel and play the role of adjusting the torque output.

This hydraulic torsional method, combined with a planetary gear transmission, can change different gear ratios to achieve forward and reverse driving.

This hydraulic transmission is different from mechanical transmission, which requires the clutch to intervene and frequently change the gear ratio. The significance is that it does not need to change gears frequently, runs smoothly, has more torque at low speeds, and has a faster reverse speed!

On this basis, Li Fanyu also deliberately designed two sets of drive systems on the fourth-generation car according to the old-fashioned mechanical transmission and steering method, which caused the tank to turn around and be inflexible.

This unlocks a very exciting feature - center steering!

If the original mechanical transmission was used, the tank would have had to pull the driver back into neutral position with both levers in turn and brake the track on one side. In this way, you can center on one side of the track and make a U-turn like a compass.

This U-turn is not just Low, but requires a large turning radius.

How much time does it take to waste in a narrow terrain during a street fight, or when a group turns around and retreats?

Li Fanyu gave this set of transmission devices named Longji, which can transmit engine power through the busbar through the hydraulic coupling and differential device in neutral mode, and transmit it to both tracks at the same time, so that these two tracks rotate at the same speed and in opposite directions.

In this way, the tank can steer with the center of the hull as the center of the steering and make a "0 radius" steering!

This function is matched with the hydraulic transmission and B-01 engine, and according to Li Fanyu's rough calculation, the fourth-generation tank can complete the U-turn in 5-7 seconds!

With this, the complete power solution is complete.

With the dragon's heart and the dragon's back, Li Fanyu is confident that the fourth-generation main battle tank will become the king of land warfare in terms of mobility!