Chapter 143: Sea water desalinator

　　 There is no doubt that all parts can be copied.
　　Wang Buyan decided to use three-grade hard alloy to improve the quality of the gearbox.
　　 With the hardness of the second grade hard alloy, it can withstand 1500 horsepower. However, it is still a bit difficult to fully withstand the high torque of 3000 horsepower.
　　 If you use three-grade hard alloy, there is no problem.
The same is true for 　　 drive spindles. The same three-grade hard alloy is used.
　　 The slightly more troublesome thing is the propeller.
　　 Its processing requires 100 million tons of hydraulic presses.
　　 In fact, for an ordinary fishing boat propeller, a hydraulic press of 200,000 tons is enough.
　　 If there are 200,000 tons of hydraulic presses or CNC machine tools in the Xinhongyang Shipyard, all parts can be solved in the shipyard.
　　, of course, refers to those parts that are universal, with specifications and standards, without patent rights.
　　 There are good or bad parts like this.
　　The advantage is that the data is open and widely used, so there is no need to worry about infringement.
　　 The disadvantage is that the performance is not advanced enough.
　　 Those advanced propellers are protected by many patent rights.
　　 Just a small propeller, there are thousands, tens of thousands of patents.
　　 The 65-meter squid fishing boat uses a general-purpose propeller with a diameter of 204 cm, with a design speed of only 11.64 knots, aluminum bronze material, four blades, right-handed, pitch ratio 0.79, diameter ratio 0.163, and total weight 718 kg. The screw machine efficiency is 0.661, the moment of inertia is 1389, and the pitch angle is 10 degrees.
　　According to the data, this propeller was designed more than ten years ago. There have been no major changes since.
　　 Obviously, today, it is definitely behind and can't keep up with the times.
　　 But, its biggest advantage is universal! Standard specifications and many spare parts. Maintenance is easy. cheap price.
　　What the fishing boat needs is cheap and good quality.
　　 Any other advanced features can be ignored for the time being.
　　 "I want to double the thrust, how should I modify it?" Wang Bu'an deliberately tested Mihara Wu. Who told the other party to be a technician?
　　 "The diameter increases by 2 meters, and the speed increases to more than 1,750." Takeshi Yonehara opened his mouth.
　　 "Aren't you afraid of the blade breaking?"
　　 "You only asked how to double the thrust, but did not say that the blades would not break!"
　　 "What if you want to ensure that the blade does not break?"
　　 "If I understand, do I still need to be a worker here?"
"makes sense."
　　 Wang Bu nodded noncommittal.
　　Yehara Takeshi’s method is of course simple and crude. It's almost impossible.
　　 Why do you say almost?
　　 Because it requires strong enough raw materials and manufacturing processes.
　　 Otherwise, the propeller blades will break every minute.
　　 The propeller was originally only 2 meters in diameter, but if you forcibly lift it to 4 meters, how much water resistance has to increase?
　　 Originally only had a speed of more than 1,100, if you increase it to above 1,750, the blades of the propeller will definitely not be able to bear it! You know, the propellers of fishing boats basically rotate at a very low speed.
　　 Sea water is not air. Its resistance is very large. Small blades need to withstand very harsh tests.
　　 Sea water is also more corrosive than air. The quality requirements of the propeller are higher.
　　 Some small bubbles can make the propeller riddled with holes, and finally have to be eliminated and replaced.
　　 A propeller with a diameter of 4 meters is about to catch up with a 5,000-ton ship.
　　 You must know that the largest diameter propeller in the world is only 11.2 meters. It is used to propel the 400,000-ton super giant ship.
　　 This super-large propeller weighs more than 130 tons.
　　 is just the weight of the propeller itself. Does not include any other accessories.
　　Also, the hub of the propeller cannot withstand such drastic changes, and it is estimated that it will break when starting.
　　There is also a bearing problem...
　　How does the propeller turn? Of course it depends on the bearing!
　　What kind of bearing can withstand such a strong power?
　　There is also a transmission spindle...
　　 What kind of high temperature and pressure does it have to withstand such abnormal power?
　　 It is conservatively estimated that the torque is at least 4000 tons.
　　 may even exceed 5,000 tons.
　　 Is it possible to implement such a simple and crude transformation?
　　Of course!
　　 That is the super raw material!
　　Additional super manufacturing process.
　　Using three-grade hard alloy. Utilize billion-ton hydraulic press.
　　 "If the blade does not break and the speed can reach 1750 rpm or more, how much speed can it reach?" Wang Bu'an continued to ask.
　　 "22 knots." Takeshi Yonehara said affirmatively, "Are you going to test me?"
　　 "Yes." Wang Bu'an said bluntly.
　　 "The maximum output power is 1500 horsepower, and the speed must exceed 22 knots."
　　 "What if the maximum output power reaches 3000 horsepower? What is the speed?"
　　 "Theoretically, it can reach 35 knots or more. But considering the strength of the marine steel plate and the influence of wind and waves, I suggest controlling it below 28 knots."
　　 "Why?"
　　 "The weight of the fishing boat is too small. The draft is not enough. It is easy to lose control."
　　 "What if the bulbous bow is added?"
　　 "Then we have to design and manufacture completely."
　　 "Do you have manufacturing experience?"
　　 "The drawings are all designed by the 708 Research Institute and are used throughout the country. You do not need to design independently."
　　Mihara Takeru is as precious as several families.
　　 He mainly recommends the 73-meter ocean squid fishing boat.
　　 The length of this ship is 72.78 meters, the vertical length is 63 meters, the molded width is 10.8 meters, the molded depth is 6.7 meters, the design draft is 3.95 meters, and the structural draft is 4 meters.
　　 Full load displacement is 896 tons, maximum displacement is 932 tons. The design speed is 13 knots and the design range is 10,000 kilometers. Infinite navigation area.
　　The fuel tank has a volume of 420 cubic meters, the ballast tank has a volume of 110 cubic meters, and the clean water tank has a volume of 40 cubic meters.
　　 comes standard with 1152KW diesel engine. The maximum power is 1334KW.
　　 "Why not build a 65-meter squid fishing boat?" Wang Bu'an asked intentionally or unintentionally.
　　 "It's not that we don't do it. As long as you have an order. We can do it too." Yonehara said, "But the 73-meter squid fishing boat is more cost-effective."
　　 "Why?"
　　 "Because the 65-meter squid fishing boat only has 25 squid fishing machines. But the 73-meter squid fishing boat has 29. It is also equipped with a crane that can lift 1.2 tons of heavy objects..."
　　 Yonehara Takeshi is indeed familiar with shipbuilding data.
　　 After all, these ships are all they used to make.
　　Because it is a popular ship, there is no considerable profit. You can only work the details and save costs as much as possible.
　　 For example, a steel double deck, one layer uses 10 mm steel, and one layer uses 20 mm steel.
　　 Wang Bu'an doesn't take these seriously.
　　 He doesn't care much about cost.
　　 What he cares about is performance.
　　 How to maximize the performance of the squid fishing boat?
　　 "I'll give you a task." Wang Bu'an said, "You can discuss with everyone and see how to transform the squid fishing boat to maximize its performance."
　　 "What do you mean?"
　　 "For example, reduce fuel tanks, expand ballast tanks and clean water tanks. Increase mechanical and electrical equipment. Increase squid fishing machines."
　　 Wang Bu'an called the old monster over and asked him to talk with Takeshi Yonehara.
　　 Wang Bu'an shall bear all the cost of the renovation.
　　 In other words, the old monster can get a brand new 65-meter squid fishing boat for the price of Rock 150, including all new equipment.
　　 "Boss Wang, are you fooling me?" The old monster felt unbelievable.
　　 "What did I lie to you for?" Wang Buan said indifferently, "how much money can you have?"
　　 "Hey." The old monster was relieved immediately.
indeed so.
　　 Others are rich and wealthy, will they care about your one and a few hundred thousand?
　　 Batai Rock 150 diesel engine, half sold and half free, the total price is 3.84 million, which is less than four million. Will others be eye-catching?
　　 More often, Wang Bu'an is doing experimental products.
　　 "Then I will transform the 65-meter fishing boat first." Mihara Takeshi was also excited.
　　 Repeat the same operation all day, really boring.
　　 If there is a little change, then freshness will come up.
　　 The 65-meter squid fishing boat is not without the possibility of modification. For example, it is still possible to add one or two air conditioners.
　　 Only need to reconnect to the line ~EbookFREE.me~ to properly install the air conditioner on-hook.
　　 The spare battery will also be removed. Replaced with a three-level hydrogen storage alloy.
　　 Such a small piece can store 5000 kWh of electricity. It feels a little weird.
　　 The transformation of the clear water tank is more difficult.
　　 Unless there is a sea water purifier.
　　 "Yes, to produce seawater purifiers." Wang Bu'an recorded the incident.
　　 To say what is the most uncomfortable thing for seafarers on the ship, it is estimated that there is not enough fresh water to use. Clean fresh water can only be used for drinking or cooking. Don't expect anything else.
what?
　　 Take a bath?
　　Don't even think about it.
　　 Unless you are willing to jump into the sea.
　　All the reasons are because of the lack of a cheap seawater purifier with a large output, and there is no way to produce large amounts of fresh water.
　　 Seawater desalination technology has been developing rapidly. In recent years, the desalination cost per ton of seawater has been reduced to 4-5 yuan. Almost the price of tap water.
　　 my country’s first desalination research laboratory is located in Yucheng. The desalination technology in West Lake Province is relatively advanced.
　　The current problem is that desalination equipment is difficult to miniaturize and produce high output.
　　It is not easy to achieve desalination on a small fishing boat. The output cannot meet the demand.
　　 According to the standard with 30 crew members. Approximately 15 tons of fresh water are needed every day.
　　 How did these 15 tons of fresh water come from? How much does it cost?
　　 If the cost exceeds 5 yuan per ton, you must think twice.
　　 It happens that the cost of small desalination equipment is very high. It is often more than 10 yuan per ton.
How to do?
　　 Wang Bu'an has a way.