I! Pretending to Be Reborn, Director of Doomsday Hoax

Mary's voice was full of regret and a little fear, and said: "Essentially speaking, it is still a machine composed of rotors, bearings, gears and so on.

"If there is a problem, there are only a few, either the rotor, unbalanced, bent, misaligned, oil film whirl, oil film oscillation, etc.

"Or, it could be the bearings. Bearings are prone to fatigue spalling and wear.

"Or, it's the gears.

"Gears are prone to failures such as fracture, wear, fatigue spalling, and broken teeth.

"For ordinary machinery, it's a big deal to do a test, but a nuclear energy difference machine has at least 10,000+ parts, and there are countless gears and rotors inside.

"A problem with any part may cause the machine to fail to operate...

"How to test? Could it be dismantled and remanufactured?"

Mary's face was sour.

If it weren't for the complexity and precision of the difference engine, they would not have spent a lot of money building Babbage's difference engine at the Eagle Country Science Museum, but it finally collapsed during the first run. "It seems that Dragon Kingdom is about to play chess! Live broadcast to the world , it turned out to be an empty shell that couldn't work!" There was disappointment in Mary's eyes.

She suddenly felt that perhaps Xu Qiu of the Dragon Country was not as miraculous as in the legend.

Cherry Blossom Country, Berry Country, Orthopedics Country, etc., any country that is paying attention to this matter is very gloating!

From a national point of view,

Once Longguo manufactures a nuclear energy difference machine, it means that the world pattern will undergo a shocking reversal!

Dragon Kingdom, after the extremely cold era, may have the capital to dominate the world because of this nuclear energy difference machine.

The oppressive power it brings, as well as its impact on the technology of various countries, is even more terrifying than the current Berry Country...

"The structure of the difference engine itself is already very complicated, and it is almost impossible to repair it, let alone this nuclear energy difference engine?"

"Even if the world's top mechanical masters gather together, perhaps they may not be able to find the reason why the nuclear energy differential machine alarmed!"

Saito Tsuyoshi, Ain, Joseph, Xiaoxiong Xin'an and the others quietly breathed a sigh of relief.

The live broadcasts were also being broadcast simultaneously on Oil Tank and Shelt. When netizens around the world saw this scene, they were immediately amused.

"Hahaha, let me tell you, how could it be produced so quickly? It turns out that the semi-finished product is used to scare people!"

"Take out a malfunctioning machine, isn't this a joke for people all over the world?"

"I thought Dragon Kingdom had a plan for the end of the day, but now that I think about it, I'm afraid it's all empty air and won't stand the test!"

"There is a saying in Longguo, which is called "Only when the tide ebbs, will you know who is swimming"! Before, I thought that the interior of Longguo was very stable, and I was very envious. In the end, I came up with this thing? It shut down after two bangs! "

"The difference engine belongs to the Eagle Kingdom. Even the Eagle Kingdom has not built it. The Dragon Kingdom wants to make it. Dream it!"

"Shame on the world!"

At the same time, Longguo, nuclear energy difference machine manufacturing department.

Xu Fu, Ji Chengping and others surrounded the nuclear difference machine.

After the alarm sounded, the huge machine stopped working.

This is the self-protection system set up by Xu Fu and others.

The nuclear power difference machine is too expensive. The simple parts of this machine cost more than hundreds of millions of dollars.

A lot of parts and materials are priceless and extremely precious!

Only in this way can the nuclear energy difference machine be formed and become the backbone of the technological machine number!

Therefore, there must be no mistakes in this nuclear power difference machine, otherwise, it would be an irreparable loss for the Dragon Kingdom and for the nuclear power dragon that urgently needs a mechanical computer drive.Xu Fu's face was pale. He, Ji Chengping, and other engineers in charge of various systems of the nuclear energy difference engine were all checking.

At this moment, they can all imagine how many voices there are at home and abroad expressing ridicule, doubt, and ridicule towards Longguo!

"I'm in charge of checking the rotor," Xu Fu said.

Ji Chengping approached with a cane, and said, "I'll be in charge of the rolling bearings."

Another old man with white hair and childlike face also came forward and said, "My team and I, let's check the gear failure first."

Chains, screws, transmission devices, etc., each part and system, are all under the command of a special mechanical master to conduct a quick inspection.

"Rotor, there should be no problem..." Xu Fu was in a state of high tension.

Now, it is a global live broadcast. If they repair the nuclear energy difference machine, they will undoubtedly show the world how terrifying the mechanical manufacturing capabilities of the Dragon Kingdom are.

the reason is simple.

Anyone who knows the difference machine knows that it is almost as difficult to repair this kind of machine as rebuilding it!

This is the most troublesome question for Xu Fu and others.

If it can't be repaired well, it will really make the whole world see the joke of Dragon Kingdom!

Thinking of this, Xu Fu gritted his teeth, and said in his heart, "I will try my best to repair the nuclear difference machine!" "

He began to carefully examine the faults of the starting rotor.

From the law of the machinery manufacturing industry,

Typical faults of rotors, such as unbalance, misalignment, oil film whirl and oil film oscillation, have different fault mechanisms and exhibit different vibration characteristics.

Therefore, the condition of the rotor can be roughly judged according to the vibration characteristics of the nuclear energy differential engine.

The unbalanced rotor is due to the uneven mass distribution of the rotor during manufacturing and assembly.

Or there is dust deposition, wear, scaling, etc. during operation,

When the rotor rotates, the center of mass deviates from the center of rotation to generate periodic centrifugal force, which in turn causes vibration.

The centrifugal force changes one cycle every time the rotor rotates, so the unbalanced vibration frequency is consistent with the rotor speed frequency.

The misalignment of the rotor includes the misalignment of the shaft system where the rotor is connected by a coupling so that the rotor is not on the same straight line, and the misalignment of the bearing caused by the deflection of the rotor journal in the bearing.

There are three types of shafting misalignment: parallel misalignment of axes parallel displacement, angle misalignment of axes intersecting at a certain angle, and comprehensive misalignment of axis displacement and intersection.

In this case, under the action of axial alternating force and radial alternating force, the power frequency vibration will be generated in the axial direction, and the radial vibration frequency is twice the power frequency of the rotor. Misalignment of the bearing will lead to instability of the oil film. If the rotor is unbalanced , there will be power frequency vibration.

As for the oil film whirl and oil film oscillation, it is caused by the oil film force of the sliding bearing.

The rotor rotates in the bearing, and is forced to vibrate by the eccentric mass force, which deviates from its static equilibrium position, so that the center of the rotor journal moves around the center of the bearing, that is, the oil film whirls, and the whirl angular velocity is close to half of the rotational speed, also called half-speed whirl .

When the speed increases to the first-order critical speed of the rotor or above, the whirl will cause the rotor system to resonate, the shaft and the bearing surface will contact, impact, and the oil film will break, resulting in oil film oscillation.

Oil film oscillation is a self-excited oscillation.

Xu Fu's detection is based on frequency spectrum fault diagnosis, mainly through frequency spectrum characteristics.

Faults are often accompanied by rich frequency components.

Experienced mechanical engineers can further determine what kind of fault it belongs to according to how much the characteristic frequency accounts for the general frequency.

For faults with close frequency components, it is enough to assist diagnosis based on time domain waveform and vibration trend.

Of course, these are very simple to say, and they are all printed in the textbooks.

However, if you really want to master it, it is almost impossible to do it without three to forty years of research!

On the other side, Ji Chengping is in charge of troubleshooting of rolling bearings.

A bearing is a part that supports a shaft, it can guide the rotation of the shaft, and it can also bear the rotating parts on the shaft.

Inside the nuclear energy difference machine, there are two types of rolling bearings and sliding bearings, but the inside of the nuclear energy difference machine is generally a rolling bearing.

A typical rolling bearing is composed of an outer ring, an inner ring, rolling elements and a cage. Because of its high efficiency, low frictional resistance, convenient lubrication, and good interchangeability, it is widely used in nuclear energy differential machines.A problem often encountered in the mechanical industry is that due to improper assembly and poor lubrication of rolling bearings, the bearings are damaged prematurely.

Or after a period of operation, failures such as fatigue peeling and wear will occur and cannot work normally.

Therefore, it stands to reason that the nuclear energy difference machine has just started, and fatigue spalling cannot occur.

However, for the sake of insurance, Ji Cheng and others still need to conduct strict inspections.

If there is a failure, the vibration frequency of the rolling bearing is very rich, and it will be more complicated when the failure occurs.

But different faults correspond to different vibration characteristics,

At this point, the use of spectrum analysis to analyze the frequency and find out the characteristic frequency of the signal can determine the cause and category of the fault.

On the other side, a group of engineers are troubleshooting the internal gears.

Gears are mechanical parts with teeth that can mesh with each other. They can transmit the rotation of one shaft to another shaft, and can realize actions such as deceleration, speed up, change of direction, and reversing.

It is the absolute core of the nuclear difference machine!

When the gears vibrate due to improper design, manufacturing errors, poor assembly, or periodic entry and exit meshing,

It will cause failures such as fracture, wear, fatigue spalling, and broken teeth of the gear.

Once a fault occurs, the gear vibration signal is very complex, and there are amplitude modulation and frequency modulation phenomena, which appear as sidebands around the meshing frequency on the spectrogram.

The vibration of gear failure has two main characteristics periodic pulse waveform,

When the gear is abnormal locally, it will produce periodic impact, which will repeatedly excite the natural vibration of the whole system.

Therefore, there are usually amplitude modulation and frequency modulation features of periodic decay waveforms in the vibration signals of gears and bearings.

In addition, vibrations caused by faults such as gear eccentricity, misalignment, tooth pitch error, unbalance, etc. will produce amplitude modulation and frequency modulation characteristics.

Tick.

Tick.

As time passed, Xu Fu and the others were sweating more and more on their faces, and there was panic in their pupils.

"No problem found..."

Xu Fu raised his head and looked at Ji Chengping and the others.

Ji Chengping also raised his head at the same time, with a confused expression.

A dozen people looked at each other, and they all saw the helplessness in each other's eyes.

The siren of the nuclear energy differential engine is still ringing, this sound is extremely sharp...

Xu Fu's face turned pale. He now hated himself for not being able to develop a perfect nuclear energy difference machine according to Xu Qiu's blueprint.Now... it's a global live broadcast!

Berry Country, Cherry Blossom Country, Orthopedics Country, those who have bullied their own country are waiting to see a joke...

At this moment, the lens of the Longguo main station is facing the huge and sophisticated nuclear energy difference machine.

The huge shape and rigid appearance are intoxicating.

However, at this moment, with the sound of the sharp siren, the faces of all the people present were very ugly.