Chapter 287： Archimedes screw pump

"Congratulations, Ada, finally got this thing out." Marlin said aloud in the noisy rotation of the steam engine.

"Thank you for Mr. Watt's ideas." Da Vinci smiled happily. After that, he took Marin away from the steam engine for easy speech.

"Well, it seems that it can be used for pumping water!" Marin said, looking at the rotating steam engine thoughtfully.

"Pumping?" Before, Da Vinci was busy with the development of the steam engine, and did not pay attention to the purpose of the steam engine.

"Of course, the steam engine is naturally for pumping water. I have a deep well mine on the island of Ireland with a depth of up to 50 meters. If there is no steam engine to pump water, it is estimated that the mining cannot be started." Marin said, it is the lead of Tara Mountain Zinc mine. Van Gore has sent someone to dig a deep well over there. As long as the mine is found, then a pump is needed first.

After all, Mount Tara is in the eastern plains of the Irish island, which is a humid climate area, and groundwater is bound to be abundant. Even after discovering underground underground rivers with surging groundwater, the underground rivers can be blocked by digging wells to block the underground rivers and prevent groundwater from spouting out. However, with the underground mine there, infiltration of underground water is inevitable. Even if the underground underground river is blocked, some water will penetrate through the wet soil layer. Therefore, there must be frequent work of the pump. The pump is just burning a little coal, and the cost is not too high.

"Then ... what pump do you use?"

In Europe today, there is no long-range water pump, and the windmill pumps water. It is more like a windmill driving something similar to a waterwheel, lifting water from a low place to a high place.

However, the pump problem is not a problem for Marin. There are three kinds of water pumps that Marin knows and understands-centrifugal pumps, screw rod pumps and piston pumps.

Speaking of which, in later generations rural areas, centrifugal pumps are the most commonly used pumps. However, Marin was the first to exclude centrifugal pumps. Why? Because the centrifugal pump relies on the high-speed rotation of the impeller to generate suction and pump up the water. But the problem lies in a "high speed". The speed of the steam engine ... not to mention. Ada has built a Watt steam engine with a rotation speed of only 50 revolutions per minute. It is used to drive a centrifugal pump. Its rotation speed is absolutely less than a few meters high. The Tala lead-zinc mine needs to pump water to a height of 50 meters, so the centrifugal pump is first out.

Next is the piston pump. In fact, the piston pump is the best kind of pump for deep groundwater and even oil. In later generations, the "knobs" that pumped oil used piston pumps to pump oil. There are several kowtow machines near this kind of kowtow machine in Marlin's previous grandmother's house. When he was a kid, he always liked to go to the "kowtow machine".

Moreover, this vertical steam engine is actually a natural kowtow machine. If the "sun and planetary gear transmission system" is eliminated, the connecting rod of the vertical steam engine is reciprocating up and down, which is very suitable for supporting piston pumps.

However, Marin knew that the biggest problem with piston pumps was the "piston". To pump the groundwater from such a deep underground, it is obvious that the piston's air tightness is very good. Otherwise, if you don't hold your breath, you may not be able to work.

Marin can't guarantee that it can produce good quality piston pumps, or even ensure that the piston pumps have good air tightness. Therefore, no matter how good the piston pump is, Marin can only give up. Who said the processing standard in this era is too poor ...

Next is the screw rod pump. The structure of this kind of screw rod pump is very simple, that is, a screw rod in the tube is constantly rotating. It **** and discharges liquid by changing the volume of the sealed cavity formed by the screw rod and the bush (inner wall of the tube).

In fact, this kind of pump was invented in Egypt by the great ancient Greek scientist Archimedes as early as BC. According to the ancient Greek historian Diodorus, Archimedes saw the local Egyptian farmers irrigate with buckets of water, and felt that the farmers were too hard and had sympathy, so they developed a pump to replace the bucket to irrigate the irrigation The way.

Archimedes made a big spiral, put it in a cylinder, made a rocker at the top, and the water outlet opened on the side of the top. As long as the handle is kept shaking, the water will keep flowing out.

Later, this simple artificial water pump quickly spread in Egypt. After the Roman Empire conquered Egypt, the Romans also learned the past. Unfortunately, after the invasion of the German Barbarians, European technology retreated for hundreds of years, and this kind of thing was lost in Western Europe. However, the Western Europeans invented the waterwheel, a tool that relies on natural forces to lift water, but it does not need this Archimedes screw pump that relies on manpower.

The force required by the Archimedes screw pump is rotation, and the Watt steam engine is just able to provide stable rotation power. Therefore, the combination of the Watt steam engine and the Archimedes screw pump is definitely a perfect combination.

Marin explained the history and principle of the Archimedes screw pump to Da Vinci in detail. Da Vinci thought about it and said:

"I really wanted to read this historical introduction, but I didn't pay much attention at that time. Because, at that time, I felt that this kind of water pump that relied on manpower was not convenient because of the natural power. Therefore, there was no more attention. With a steam engine, it seems that it can really be used ... "

Marin is not nonsense, he called a few carpenters, spent a long time to make a small spiral wood rod and a sleeve. Then, a fresh Archimedes screw pump model came out. It's really good for pumping water.

The most important thing is that the screw rod pump has a large head, which can reach 68 meters. The vacuum pump driven by the early Newcommen steam engine can only pump water up to a height of 10 meters. Obviously, in mines over 50 meters deep, that kind of vacuum pumping machine is useless. Only the screw rod pump with a head of up to 68 meters has practical effect.

But the problem is that it is extremely difficult to make a screw rod up to 50 meters long. Even if a wooden pole is used to carve a spiral, it is difficult to find a log 50 meters long. Moreover, the 50-meter-long log is very heavy, and it is difficult to drive with a steam engine.

As a result, Marin lowered the requirement and only required a screw rod 20 to 30 meters long ~ www.novelhall.com ~ In this way, the water in the deep well can be pumped out by the relay of two steam engines.

Next, Da Vinci, who had just completed the development of the Watt steam engine, was nervously invested in the development of the Archimedes screw pump.

"I'm really exhausted. I just got a steam engine and I'm going to make a pump. By the way, Marlin, after you get it out, are you going to promote it in the swamps of East Friesland? The pump is much more efficient than the Dutch windmill. "Da Vinci asked curiously. He did not have much respect for Marin, mainly because he had hated Marin for kidnapping him. Later, disrespect became a habit. However, Marin did not care, after all, Da Vinci was a cattle man, a big scientist, and it was nothing. Moreover, this product is not an official, and does not need to follow the hierarchy so much. Because, Marin believes that great scientists are privileged ...

"No, Ada, even if you get the steam engine and the pump, I don't plan to promote it in East Friesland now." Marin directly denied Da Vinci's idea.

"Why?" Leonardo was anxious. As a big scientist, I most like that my inventions have been applied in society. In this way, people can also praise his good name.

"Ada, I haven't won the Ruhr area yet. The Ruhr area is a coal-producing area. If I haven't won the Ruhr area, take out the steam engine. Isn't this a price that makes people sit? The Ruhr area is also difficult. So, I won't be able to disclose the existence of the steam engine until I get the coal production area in the Ruhr area. "

"Well, you should go get the Ruhr area as soon as possible. I will study my steam engine and water pump first to see what can be improved ..." Then, Da Vinci began to tinker with the machine, and then Don't care about Marin anymore ...