Chapter 229 (1/2)
Although the original function of the waterwheel is to draw water, that is, to lift water from a lower place to a higher place, which is suitable for drawing water from the river to the outside of the river bank, with the continuous development of the waterwheel, people gradually realize that it is a great waste for the waterwheel to only draw water.
The power of the water flow is very strong, and once the water wheel is driven by the water flow, the power generated is also great.
Especially on the main shaft of the waterwheel, because of the force arm and torque, the power generated by the rotation of the main shaft of the waterwheel is great.
Even if the thrust force of each horizontal plate of the water supply truck is only five kilograms, the torque of the main shaft of the water supply truck can be roughly calculated by applying a later formula.
According to the conversion of one kilogram force equal to 9.8 nm, the spoke length of the waterwheel is five meters, that is to say, a horizontal plate can bring 245nm torque to the main shaft.
And the maximum torque of a car engine with a displacement of 2.0 is only about 200 nm.
Not to mention that there are 16 horizontal plates on the water tanker
People in ancient times could not calculate the arm of force, torque and other things, but this did not prevent people from clearly realizing that the main shaft of a water wheel could actually do many things after it turned.
As a result, whether in China or Europe, waterwheel was used to do more things in ancient times.
Just like in Europe in this period, it is very common to use water wheel as power. Before watt successfully improved the steam engine, hydraulic drive was a very important source of power in European countries.
The two water tankers made by gaoshu tribe are experimental in nature, so the diameter of the water tankers is only about 10 meters. This is a small water tanker among the water tankers.
However, even a small waterwheel, through the rotation of the spindle to drive other workpieces for some work is more than enough.
A gear with a diameter of about half a meter is fixed at the end of the main shaft of the water tanker. The large gear is also cast.
Thanks to the calculation formula of gear modulus provided by stone bear to Jack, this gear is made very well.
When the spindle rotates, it will rotate with this gear. If the rotation speed of the water wheel is three revolutions per minute, then the rotation speed of the big gear is also this speed.
Three laps a minute is a relatively fast speed for a waterwheel, but it is very slow for mechanical power.
However, as the driving gear, the gear has a large diameter and a large number of teeth, so once a pinion is meshed with it, the speed of the pinion will be increased by N times.
It can be calculated by applying a very simple formula of later generations.
For example, as the driving gear, the number of teeth of the big gear is 72, and the speed of one minute is 3 turns. When a driven wheel with six teeth is meshed with the driving wheel, the driven wheel can reach 72 △ 6 in one minute × 3 = 36.
The speed of 36 revolutions per minute is certainly very slow for a machine, but it is enough for today's tall tree tribe.
If the waterwheel wants to drive a large mill, the speed of 36 revolutions a minute is too fast.
Of course, if you want to get a higher speed, you need to carry out a two-stage transmission.