Based on common sense and basic understanding of machinery, Li Mengxi believed that the wooden barrel could have an impact on the efficiency of the crusher. However, strange things happened inexplicably.

As for the material of the barrel, all barrels made of clay, metal, wood, etc. are all of the same shape and size. Except for the material, the other variables in the entire round of testing are exactly the same, including water flow, knives, soybeans, and crushing.

Time is all the same.

But in the end, the crushed bean dregs were put into barrels and weighed. Unexpectedly, it was discovered that iron barrels were the most efficient, followed by clay barrels, then copper sheets, and then various types of wood.

Based on preliminary judgment, Li Mengxi believed that due to weight, the iron barrel was lighter and the extra wasted kinetic energy was less.

But when Li Mengxi weighed all the various barrels, he found that the iron barrel was the heaviest, the copper barrel was also heavy, and the clay barrel was also heavy.

If it is related to weight, then the heaviest metal bucket should be the least efficient, but it should not be the most efficient.

In order to find out the answer, Li Mengxi reinstalled the bucket. He wanted to see for himself why the crushing efficiency of the metal bucket was so high.

The river flowed quietly, the water wheel whirled, the gear set clicked, and the grinder made a humming sound, mixed with the crackling sound of fried beans.

Li Mengxi looked over and saw that with the rapid rotation, the beans in the iron bucket were flying up and rotating around the wall of the bucket. If there were no grinder blades, this system would be very stable, but due to the existence of the grinder blades

, the crusher kept knocking or breaking the beans, and the scattered bean dregs and beans kept hitting the hard barrel wall, and then bounced back.

In order to explore the answer, at least two groups of control groups should have been designed. Before the next control group started testing, Li Mengxi felt that he had vaguely observed the answer.

The truth is probably that the beans hit the barrel wall and bounce back.

Using the extreme hypothesis method, suppose that the wall of the barrel is made of plasticine and is extremely soft. Then, every time a bean hits the wall of the barrel, it will be stuck to the plasticine and then slowly fall down.

This is equivalent to adding a slowdown button to the crushing process. In the entire system, many beans become slow and dull because of the plasticine.

If the relative kinetic energy is also taken into consideration, and a bean with a huge speed is bounced onto the blade, then the relative kinetic energy of both parties is added, and the total kinetic energy is very terrifying.

And if a bean slowly hits the blade, then the relative kinetic energy is not large enough.

Therefore, the harder the barrel wall is, the more intense the movement of the beans after hitting the barrel wall, and the higher the crushing efficiency.

On the contrary, if the barrel wall is too soft and easily deformed, a lot of energy of the entire system will undoubtedly be wasted on useless deformation.

If you use this guess, it fits the data exactly.

In statistical data, iron is higher than clay, copper, and wood.

Iron sheet, clay, and copper sheet are arranged in order of hardness from high to low.

Li Mengxi went back and sorted out the types of wood and the types ranked by data. He was not familiar with the nature of wood. He read the data to the craftsmen, "Sophora wood, jujube wood, paulownia wood, poplar wood, mulberry wood..."

After listening to this, the craftsmen all agreed that this was the order of hardness from large to small.

This chapter is not over, please click on the next page to continue reading! What a surprise.

One of the surprises was that I didn't expect that the weighing method contributed by the craftsmen was so sensitive, and that it could detect such a small impact caused by such a small difference in hardness between iron sheet and wood.

The second surprise is that the original purpose is to crush beans, but you might as well find a clever way to test the hardness and elasticity of wood. Generally, to test the hardness of wood, you have to finish the wood into sticks of the same length and thickness, and then use a guillotine

Lift the blunt knife to a certain height, and let the blunt knife fall freely at this height. In this way, the result can be tested. Using a guillotine to test will require a lot of wood to be finished, which is slightly more difficult to process. And if you use beans

, it’s much simpler. You only need to cut some wooden boards, then plan them flat, and let the beans fall freely to see which kind of wood bounces high. The one that bounces the highest must have excellent hardness.

It goes without saying that it is easier to process a pile of wooden sticks that are thick, thin, long, short, or even without cracks or even a little bend, or to plan some wooden boards that do not need to be the same size or thickness.

After a test, it was concluded that if the shroud barrel of the crusher can be made of pig iron, then wrought iron will never be used; if hard wood can be used, then soft wood will never be used.

Water, beans, wooden barrels, all the simple things were tested, and what was left was the most complicated blade.

Blades differ in shape, quantity, installation angle, and arrangement.

Regardless of the shape, the Mantis Blade is good, so use it first.

Regarding quantity, I don’t know whether three blades are better, four blades, five blades, or more is better.

Because the number of blades is related to the arrangement of the blades, and the arrangement is related to the installation angle, so it is best to test the installation angle first.

The previous way to install the blade was with the blade facing upward, like a lotus flower. This installation angle was about 45 degrees.

When it comes to the test, in the first type, the blade is in the shape of a fan blade, flat against the bottom, with an angle of zero. After two hours, the beans are crushed, the bean dregs are taken out, put into a cylinder, weighed, and the value is recorded.

In the second type, the blade reaches the maximum angle, and the blade is installed straight, like a mantis pouncing forward to feed. At the end of the test, record the value.

The third type, the blade is ten degrees.

The fourth type, twenty degrees.

…

From zero to ninety degrees, set nine samples.

As a result, after the laborious test was completed, it was discovered that the blade was flat against the bottom like a grinding wheel. At zero degrees, this simplest installation method turned out to be the most efficient.

Li Mengxi later realized that the blade of the grinder was placed flat.

When the blades are laid flat, there are no complicated installation angles. The only remaining variable is the number of blades.

In the test of the number of blades, there are various situations: three blades, four blades, five blades, six blades, until ten blades. When the number of blades reaches ten, the blades are almost close to each other, forming a knife.

wheel.

After tedious testing, it was found that neither three blades were the most efficient, nor were ten blades the most efficient, but six blades, which was in the middle, were the most efficient.

Li Mengxi analyzed the data and found that perhaps, with three blades, there were not enough blades and the contact between the blades and the beans was not sufficient. However, if there were too many blades, the distance between the blades would be too close and they would block each other.

Therefore, a six-blade blade, at least a palm-long mantis knife, can touch the most beans without blocking each other.

At this point, all the testing stages of the crusher are over.

A test took twelve days, used hundreds of kilograms of beans, and used more than 500 blades. In order to select more than 500 blades with similar sharpness, several times as many blades were discarded.

, in order to test the sharpness, I even used countless piles of paper.

Paper has also given rise to the demand for special paper. As for testing sharpness, there is no doubt that the thinner and more fragile a sheet of paper is, the more accurate the sharpness test will be. This is like, if

Use strong mulberry paper to test the sharpness. So assuming that a sword with a sharpness of 70 can break three pieces of paper, a sword with a sharpness of 71 can only break three pieces of paper. A sword with a sharpness of 75 can only break three pieces of paper.

There were only three sheets, and the fourth sheet was not broken until the sharpness reached eighty. In other words, for the hard mulberry paper, the difference between the sharpness of seventy-one and the sharpness of eighty is almost invisible.

.

However, if you don't use mulberry paper and use the kind of paper that can be broken by blowing to the extreme, then a knife with a sharpness of 71 can break 20 sheets. If you add a slight degree of sharpness, the sharpness will be 72.

Another one was broken open, the sharpness increased slightly by two degrees, and another one was broken open.

This greatly increases the measurement accuracy.

There is no paper that can be broken by blowing bombs. When selecting a knife, the sharpness error of the knife is ten degrees above and below. With the special measurement paper, if the crusher is tested next time, the sharpness error of the blade will be controlled within two degrees above and below.

Within.

There is no doubt that the blade sharpness is extremely close, and the test results are extremely accurate.

By one extrapolation, now that the manufacturing plan of special paper for testing knives has been put forward, some papers that are not strong enough but have excellent softness can be used to make napkins, and they have been used to make medicines a long time ago.

Filter paper is needed. All these demands combined require the development of special-purpose paper in addition to normal printing and writing paper.

According to the results of the twelve days of research on crushers, the optimal configuration of the crusher based on the mantis blade is——

Regarding soybean variables, the softer the soybeans are soaked, the higher the crushing efficiency. The optimal soaking time for soybeans is one day and one night.

Regarding the variable of water, adding water can improve the crushing efficiency. Adding too much water will reduce the crushing efficiency. The best data for the amount of water added is that the water should cover three inches of the soybeans.

Regarding the variable of the barrel, as for the shape of the barrel, it is best to have a round shape with a big top and a small bottom. As for the size of the barrel, the bottom of the barrel is two inches larger than the blade as the best. As for the material of the barrel, the material of the barrel

The harder the better, the best is pig iron, and the most cost-effective is hardwood.

This chapter is not over yet, please click on the next page to continue reading! As for the blades, there are variables such as the number, angle, and installation method. Preliminary tests show that the efficiency is highest when the blades are flat against the bottom. The optimal number of blades is six.

The six blades are evenly arranged at an equal angle of 360 degrees, it doesn't matter whether they are clockwise or counterclockwise.

After so many tests, every improvement can improve some efficiency. Although the improvement in efficiency may not be large, the accumulation of so many improvements has improved the entire crusher system to the ultimate optimal state.

Li Mengxi assembled two pulverizers. One was the original version of the pulverizer. The original plate was filled with as much as half a bucket of water. The bucket was a round bucket with the same thickness from top to bottom. The bottom of the bucket was as big as a washbasin. The material of the bucket was

It is ordinary wood, and the blades of the crusher are eight densely packed, with the blades standing upright and arranged in a lotus shape.

On the other grinder, the water filling height is only three inches higher than the soybeans. The bucket is funnel-shaped with a large top and a small bottom. The bottom of the bucket is only two inches larger than the blade. All the beans that leak out are within the scope of the blade. The bucket is made of

It is made of hard iron sheet and has six blades, flat on the bottom and evenly distributed.

Then, two crushers standing on both sides of the river added the same five kilograms of soybeans and started crushing them at the same time.

After an hour, the crushing was stopped and the bean dregs processed by the two crushers were weighed. The contrast was extremely obvious. The bean dregs crushed by the new crusher were weighed after filling a cylinder. The weight was significantly heavier than that of the old crusher.

Go for one or two more.

You know, in all the previous testing sessions, there were many tests, and the weight difference was only a few dollars.

Adding all the improvements together, the total efficiency improvement is astonishingly obvious.

Because the fineness of the bean dregs is not the final process of making tofu, Li Mengxi ordered two different crushers to produce tofu.

Two days later, based on the preliminary judgment based on the tofu produced, the efficiency of the latest improved grinder was nearly twice that of the old one!

Li Mengxi knew that after the improvements, the efficiency would definitely increase, but he did not expect that the efficiency would increase so horribly.

Among the improvements involved, such as water and iron sheets, the improvement effect of these improvements cannot be too great. Li Mengxi thinks that the improvement of efficiency may be in two points, one is barrel shape, large top and small tea cup shape, or

The funnel-shaped barrel allows beans to be easily concentrated on the blade, which greatly speeds up the crushing efficiency. Another important improvement is undoubtedly the most important improvement on the blade.
To be continued...