The Rise of Heavy Industry 1980

Tang Anna smiled: "It's an honor." "

As soon as the test bench was started, the two power systems were running at high speed. On both sides of the bench there is a very different situation. On the side of the bench, the faces of the people of Changhai Agricultural Machinery were solemn, and the three Daursons on the other side of the bench were chatting with each other, looking very relaxed.

......At

a certain moment, the sound coming from the bench suddenly changed, and a certain noise was added to the originally clear and powerful cylinder popping sound.

This noise has persisted ever since, and it is getting louder and louder. All eyes were on Daurson's SP3 gearbox...... Because that's where the noise happens.

"What's going on?" the smile on Danio Griffin's face disappeared instantly, and he didn't bother to talk to his companions, striding towards the SP3 gearbox.

The other two of Dawson's tensed up and followed Danian to the bench.

"Tutu Tu Tu ...... Knock knock knock ......

" The engine pop and the noise from the gearbox are intertwined to make it particularly harsh. At this moment, it is even clearer to see that the cable on the top cover of SP3 is swaying violently.

On the other hand, the CC20-4 gearbox did not shake unexpectedly.

"Look, look, the SP3 is vibrating a lot, and Daurson's gearbox is vibrating very much!" Hu Qingbin almost shouted a broken sound.

"I saw it, I saw it, our gearbox is still in good condition!" Ma Sanyuan also shouted.

"I saw it too!, which shows that SP3 is not as good as CC20-4!" Fang Yu, who had always been silent, also shouted.

"That's great! It's us who wins!" Zhang Miaomiao clenched her fists excitedly, countless thoughts flashing through her mind, which seemed to explain the phenomenon in front of her, but couldn't grasp the key ......

Danio Griffin, a tall man, stood quietly next to the SP3 gearbox, motionless as if by magic, and the expression on his face was like dead ashes.

"How so...... How could this be!" He couldn't figure out why.

"You're the chief technical engineer of Daurson, you won't be unaware of this phenomenon, right?" Wang Chaoyang asked softly.

"I...... Of course I do!" Danio looked away from the gearbox and stared at the young man across the bench, "The SP3 gearbox resonated, how could I not know about this damn phenomenon." But I can't figure out why, resonance is the deadliest problem with transmission design, how could it happen to the SP3, I can't figure it out...... Wait, you seem to have expected this, how do you know, tell me, tell me the damn reason!"

Danio was very emotional, and a pair of brown eyes in his deep sockets widened like brass bells.

Wang Chaoyang nodded and said, "Of course I can tell you, even if you don't ask, I will explain it to others...... However, before that, the laborious workers turned off the two systems, otherwise the noise in the workshop was too loud. "

Immediately turn off the fire!" Yan Hengshan commanded loudly. The worker who was in charge of managing the experimental bench immediately trotted over and extinguished the engine.

The huge experimental workshop instantly fell silent.

Everyone's eyes focused on Wang Chaoyang.

"The concept of resonance, I would like to say two things briefly, every product has its own resonance point, and gearboxes are no exception. During the operation of the system, due to the frequency of the engine stroke and the rotation frequency of the traditional system, these will become potential vibration sources, and when the vibration source is close to the natural frequency, it is called resonance.

Wang Chaoyang paused and continued to explain: "The SP3 engine, as described by Ms. Tang Anna, performed very well in the double load test, and the vibration was very weak. It also performs very well under extreme loads, and the vibration is even better. However, in my opinion, this design is not sensible, and it may even be a design vulnerability.

This contradictory remark made the people around him puzzled. Even technical masters of the level of Zong Shiguo and Ma Sanyuan couldn't keep up with the ideas.

Only Zhang Miaomiao nodded thoughtfully, waiting for Wang Chaoyang's next words.

Wang Chaoyang continued: "Through the description I just described, have you found a rule, the heavier the load transmitted by the SP3 gearbox, the better the vibration. Then the reverse is true, the smaller the transmitted load, the worse the vibration will be...... This is the main reason why I speculate that the SP3 gearbox resonates when there is no load. The

people around carefully savored Wang Chaoyang's words, and Zong Shiguo and Ma Sanyuan had gradually understood Wang Chaoyang's thoughts. As for the media reporters, they are even more confused. Of course, the media reporters were confused, but they captured a key message: SP3 resonates in no-load conditions.

Zhang Miaomiao followed Wang Chaoyang's train of thought to think, and at a certain moment suddenly shouted loudly: "Oh

, I know!" Wang Chaoyang smiled faintly and said, "What do you know?" "

I'll show it to everyone!" Zhang Miaomiao said and approached the experimental bench directly. She first took out a screwdriver from the toolbox next to the bench, and then tapped it twice on the case of the SP3 gearbox, making a crisp "dangdang" sound. Then Zhang Miaomiao knocked on the chassis of the CC20-4 in the same way, making a "do-do-do" sound, which was much duller than that of the SP3.

Seeing this, Wang Chaoyang nodded with satisfaction, because he knew that Zhang Miaomiao's move showed that she really understood, and he didn't need to waste his tongue to explain to others next. Well, with such a super savvy girl, it's really a good choice.

"You can hear that the SP3's chassis has a crisp sound, which indicates that its resonance frequency is high, while the CC20-4's chassis has a low sound, which indicates that the resonance frequency is low. This is the reason why the SP3 resonates in the no-load condition. Zhang Miaomiao finally explained.

"But according to this reasoning, CC20-4 will also resonate?" someone asked.

"Resonances are unavoidable, but they can be artificially adjusted. The resonance point of the CC20-4 is in the heavy-duty region, as described by Ms. Anna Tang, at approximately twice the rated load. However, the speed is relatively low when the rated load is doubled, and the noise generated is not obvious. Zhang Miaomiao continued to explain.

After this explanation, the vast majority of people suddenly realized.

Resonance is unavoidable, so adjust the resonance point to the low speed zone.

Zong Shiguo, as the technical director of Changhai Agricultural Machinery Headquarters, was both excited and shocked at the moment. He had known the concept of resonance points for a long time, but he had never seen anything that could regulate resonance in this way.

The shock in the heart of Ma Sanyuan, the chief engineer, was no less than that of Zong Shiguo, the plan for CC20-4 was completed under his nose, and he never knew that Wang Chaoyang and they had even considered the resonance point. It's incredible.

"I doubt it!" shouted Daurson's chief technical engineer, Danio Griffin, who had been silent.

"What do you suspect?" Wang Chaoyang asked.