Lin Gao Qiming

Chapter 743 Technical Problems

No one knows whether the iron wood is the so-called iron pear wood in Mond's mouth. As for the iron wood in the lumber yard, no one can see why.Finally, I decided to consult Fa Shilu from the Ministry of Agriculture—he was considered the most professional botanist in the Senate.

"It should be the same thing." Fa Shilu said, "This is a tropical and subtropical tree species. It is a common tree species in the mountains of Yunnan and Guangxi, and it is also found in Guangdong. It is often used in Guangdong furniture in this time and space. It is not special. Precious."

"Lin Xianming said that this is the best wood for shipbuilding, and it is running out now."

"In terms of the demand for shipbuilding, iron wood is of course not much, but for making furniture, there is a lot of iron wood. Even in the Qing Dynasty and now, it is not particularly rare." Fa Shilu said He called out to an indigenous experimenter in a gray coat, "Get a sample of iron wood!"

A few minutes later, the experimenter brought a specimen box, and Fa Shilu opened it for everyone to see:

"This is the trunk sample of the iron wood. How about it? It feels a bit oily, right? The oil content of the iron wood is very high, and the oil content of the seeds is 79%. It can almost be used as an oil crop. And its wood fibers are particularly long , it is very difficult to cut off. The strength is one of the best among trees. Not only can it be used to build ships, but it can also be used to make some mechanical accessories. Many of our towed artillery mounts, frames and wheels are also made of this. Although It's a bit cumbersome to process, but it's strong."

Fa Shilu talked to a group of shipbuilders in a lecture tone.

"In the final analysis, can iron wood be used as a ship bearing?" Jiang Ye asked cautiously after his high-level discussion was over.

"This is not my specialty anymore." Fa Shilu said, "Speaking of machinery, isn't it your specialty?"

The people who came to consult almost vomited blood.Doesn't that mean you didn't ask anything?
On the way out of the farm, a group of people debated whether to use iron wood as an oar shaft according to Mond's "hearing".This is a large ship with thousands of tons. Once it was put into the water for sea trial, the propeller shaft was ruined, and it had to be re-entered the dock to repair it.

"Practice is the only criterion for testing the truth. I think we should adopt the most direct method and do experiments first." Jiang Ye proposed to modify one or two of the current steam boats to see the effect.

The steam boats are equipped with 12-horsepower steam engines and are ready-made power boats.However, its propulsion method is rather special. It uses the so-called retractable propeller, which is equivalent to a kind of outboard paddle propulsion-this is what the shipyard used to avoid the problem of propeller installation.Of course, the price is that the transmission of the power unit becomes quite complex.

"If the large steamboat can be turned into a propeller, it will be of great significance for us to install the 854 modified propeller, at least it can accumulate experience."

"Yes, we will try every possible solution," Zhou Billy said.

After the coordination of the Planning Institute, the Navy "generously" provided five steamships-this kind of generosity was conditional, and the six ships were all in poor condition due to frequent breakdowns during the Pearl River Battle.The Navy said that as long as they can be repaired, the people in the Machinery Industry Department will do whatever they want.Subsequently, under Zhou Billi's proposal, a "6 Reconstruction Engineering Technical Team" was set up in the shipyard, and a number of senior technicians with certain attainments in shipbuilding, machining and other aspects were selected to participate, and they were specially stationed at the factory to solve various technical problems.As the project leader of the entire shipbuilding program - "First Shipbuilding Renovation Program".

Zhou Ke from the Ministry of Machinery Industry was appointed as the project leader. Other members of the project team were unable to work full-time in the shipyard, so he was appointed as the executive staff. Zhou Ke graduated from a bachelor’s degree in mechanical engineering, and his second major was thermal engineering, which is considered shipbuilding. It's a little bit related. He has a good foundation in fitters and lathes, and he likes to make ship models. He has become the most suitable person in charge of the shipbuilding project team among the veterans.

Zhou Ke is a stout man with a round face. He claims to be the person in charge of the project, but he doesn't know much about shipbuilding. As a resident guide, I have been in any factory.Became a typical so-called "generalist" who "can do everything".

The first thing after taking office is to solve the problem of drive shaft and propeller.

The engineering team first pulled a big boat onto the berth—although the big boat had only been fighting in Guangdong for two months, there were already a lot of barnacles on the bottom of the boat. The boatmen first carried out the work of cleaning the bottom of the boat Afterwards, Sun Li took people to disassemble the steam engine and boiler on the big boat for overhaul.

Propellers are relatively easy to solve. Although they don't have a real object with a propeller, they have a full set of CAD drawings of various propellers.What Jiang Ye meant was to directly use the machining center to make one, and then use this to turn sand to make molds, and make the whole batch. Zhou Ke felt that this was a bit of a fuss.

"Don't we have the motor boat on the Fengcheng wheel? There is a propeller in the spare parts. Use that as a model to turn the sand."

Xiao Bailang first used the propeller to make a clay mold, then turned it into a hard mold, and finally cast the propeller for the first small boat with cast iron.

Zhou Ke first asked the computer to find out the center of gravity and center point, and then drilled holes on the hull to install the shaft sleeve and shaft rod after obtaining the data. He installed the iron wood propeller on the No. [-] test boat. Force wood is doable.In the sea trial, the bushing did have a small amount of water ingress at the beginning, but it stopped before it entered the point where it needed to be bailed.

However, after all, Daihatsu is a 12-horsepower boat with only a few tens of tons, and the 854 is a steam engine with a displacement of more than 1200 tons and a 500-horsepower steam engine. Is it reliable to use a wooden shaft for such a boat? No one in the entire project team dares to guarantee it.

Then they tried various shaft sealing methods. In fact, all the dynamic sealing methods given by everyone are feasible.However, there are more or less various problems, some processing methods are not up to standard, and some materials are not up to standard.Roughly, design thinking goes far beyond processing capabilities and material levels.

The stuffing seal is the simplest of all sealing methods, and the effect is not bad - the speed of water ingress is not very fast. If there is a water pump on board, this water ingress is not a big problem, let alone if there is a steam engine, pumping water is not a burden.However, there is still no good solution to the heat dissipation problem. With 500 horsepower and a speed of hundreds of revolutions per minute, the heat generated by friction is very powerful, which is almost equivalent to a small electric furnace with one or two kilowatts. If there is no heat dissipation method at all , reaching a red-hot state is common.

In the end, Zhou Ke decided to use a liquid oil seal with circulating cooling.The sealed oil tank is set above the propeller drive shaft, and the oil is slowly injected into the shaft box by gravity.The oil has a certain pressure and will slowly leak out through the shaft box to resist the infiltration of seawater.The oil itself acts to cool the drive shaft.Most of the oil is recovered by the pump, and then re-injected into the oil tank after an external cooling for recycling.

The structure of this oil seal is relatively simple, and the oil recovery pipeline and power are a little more complicated.And the fat used can be castor oil or coconut oil - both of which are available at the Planning Institute.

"Are you sure this plan is feasible?" Zhan Wuya looked at the model that Zhou Ke brought to his office.

"It's feasible." Zhou Ke opened the model—a very simple model but with a large scale—in order to fully demonstrate the details, "We carried out the loading test on the No. 5 test boat, as well as the land operation test and the water test. In the platform test, with the water pump, the leakage speed of the shaft box using the oil seal is completely within the controllable range. I just don’t know if coconut oil or castor oil can be fully supplied. After all, it is not [-]% recycled, and there is a certain loss. The seal oil needs to be supplied for a long time .”

"It's not a big problem. As long as you can make sure that most of the oil can be recycled—any kind of oil can be used by chemical workers anyway, and the replaced sealing oil can be used to make soap at most." Zhan Wuya knows whether it is castor oil or coconut oil. , there is still a certain stock in the inventory of the Planning Institute.Especially coconut oil, since the Sanya base, the supply has been quite stable.As for castor oil, the Central Government Council has mobilized students through the Ministry of Education to plant this plant extensively at home and in schools using fragmented land. Before there was no mineral oil, castor oil was considered a good industrial oil.

Zhou Ke said excitedly: "That's good! The next step is to solve the problem of large propellers."

"One more thing." Zhan Wuya picked up a thick file bag on the table, "This is from Qian Shuiting, it's about sailing."

"Sail outfit? Didn't you decide to use horizontal sails?"

"According to this Qian Shuiting, full horizontal sails have high requirements for sailors..."

"We've decided to use a power engine for sailing."

"According to what he said, full-horizontal sails cannot be fully mechanized. A considerable amount of work still needs to be solved by sailors climbing the mast. He suggested switching to the so-called so-called ..." Zhan Wuya for a while Can't think of the term—Barquentine—"Forget it, anyway, you know, he's written it clearly in there, and there are drawings."

"Understood, I will notify the sail workshop when I get back."

Zhan Wuya said: "Also, you have to submit a report to me: about the application for the manufacture of steel wire ropes and thin iron chains with the following specifications." He gave him a document, "Huang Tianyu told me yesterday that both of them are The things that must be used in the auxiliary equipment of power steering, but the industrial sector has never produced these, it is tantamount to "special needs manufacturing", and you, the project leader, need to propose."

"Okay. I really didn't expect to be able to mechanize sailing."

"According to Mr. Wen, the last and most modern all-steel galleon—used to transport bulk cargo such as wheat, struvite, and Chilean saltpeter—has only 20 sailors. All sails are mechanized. It will be great when we have a ship like this."

After Zhou Ke left the office, he went to the "Fire Cellar", everyone called the department managed by Xiao Bailang that way.In the industrial system, industries related to fire, such as kilns and foundries, are under his control, from firing crystal clear bone china and glass to large-scale castings, from industrial equipment to personal hygiene Sanitary ware, all belong to his management.After more than two years, Xiao Bailang, who was in Yushu Linfeng and Pan'an, became dry and dark.

Xiao Bailang is currently organizing his workers to make clay molds for wooden propellers.This wooden propeller has a lot to offer.It is a "prototype" made by a machining center.There are some large and medium propellers in reserve in the warehouse of the Planning Institute-they are spare parts for Fengcheng and other modern ships.But Zhou Ke didn't know if it was suitable.So he asked someone to optimize the propeller type according to the ship model modified by 854, and then extract the corresponding CAD drawings for some optimization and modification, and finally input it into the machining center to manufacture a full-scale wooden model.

Workers use this wooden model to first turn out a clay model, and then make a hard model based on the mud model.Then the wooden mold was properly preserved.

The propeller is made of aluminum brass based on the previous experience of making propellers for small boats. Although it is not yet possible to smelt aluminum, the source of aluminum is wide, and the smelting technology is not high, so self-production is relatively easy.Compared with other sources of non-ferrous metals such as manganese bronze and nickel aluminum bronze, it is much easier
The newly smelted and cast aluminum brass ingots transported from the workshop of the Ministry of Metallurgy were piled up next to the crucible, waiting to be melted and cast.

"Casting only takes one day, making the mold is very laborious!" Xiao Bailang exhaled, his face was dark, and a black and oily labor protection mask was hanging around his neck. "I want to tell Zhan Wuya that I need a bigger crucible and continuous casting." He looked at Zhou Ke, "You don't want to equip each type of ship with a propeller, do you?"

"It's nothing, I'm going to use this kind of propeller in the next stage. It should be no problem to use the same propeller for a 1200-ton ship and a 500-ton ship. No matter how big the ship is, use double propellers."

"Well," Xiao Bailang sat down on the stool, and immediately a girl in blue work clothes brought a big glass of bubbling salt soda, and asked him to drink it all in one gulp.Zhou Ke saw that this girl had short hair that reached the ears, and a pretty face, but her breasts were rare and full—the appearance of a child with big breasts.I couldn't help but wonder in my heart: when did you have such a superb product when you bought a life secretary?

"Hmph, aren't you jealous?" Xiao Bailang squinted at him

"This girl is not bad, why haven't I seen it before, can't she open the back door for you kid?"

"This is S-level, you only spend C-level money, and of course you only want to play with a black-skinned girl." Xiao Bailang said proudly, "I didn't go through the back door, I got it by lottery."

"I don't believe you are so lucky! It must be the people from the Executive Committee who opened the back door for you!"

"What 'open the back door for me'!" Xiao Bailang became furious, "Don't blame the executive committee for your hard life." He tilted his chin towards the girl, "Come on, sing a song for me! You losers are so mad. "

The girl didn't dare to be negligent, and hurriedly sang a so-called Cantonese tune that she didn't know.One by one, the workers stood at a place three feet away from Xiao Bailang with awe-inspiring expressions, listening to the ditty - the ditty sung by Chief Xiao's concubine is very good, and everyone loves to listen to it. I sincerely admire the heroic feeling of women working in the factory.

The girl's voice was delicate and soft, which made Zhou Ke's heart tremble after hearing it.Can't help secretly jealous.Xindao, could it be that the executive committee really did something tricky on the distribution of maids?Although considering Xiao Bailang's work situation, it is worthwhile to have an S-rank maid, but such black-box operations should be resolutely put an end to it!He was already dissatisfied with the tendency of the executive committee, and now he became more and more suspicious.

As for the large transmission shafts, connecting rods and cranks used to drive the propellers, Bopu's arsenal is responsible for the manufacturing.They have large forging machines - they were originally installed for forging cannons, and they were also used to forge some large workpieces.These forging machines are simpler than the forging equipment brought by the traversers from the old time and space, but they are far superior to the equipment brought in in terms of machine size and forging capacity.The forging workshop of the arsenal is also the busiest workshop in the manufacturing director's department. Forging is carried out day and night, and part of the iron keel and ribs for the construction of new ships are also forged here.

In the arsenal, steam engines for ships are still being produced. Since the finished products of steam engines and boilers are relatively bulky, in order to facilitate transportation and installation, during the industrial layout, the production and manufacturing workshops of the two are arranged in the arsenal. Yes, some of the standardized parts are provided by the Bairen Industrial Zone.

All the steam engines of the traversers so far have been supplied with steam from Lancashire boilers - modified and equipped with surface condensers.It can provide distilled water for the boiler to ensure the continuous use of the boiler.

Lancashire boilers can also provide steam for marine steam engines, but the efficiency is relatively low. The same power requires more boilers to supply steam.This is uneconomical for ships with limited space, so Sun Li and others who were in charge of manufacturing steam engines have a new task to develop new high-pressure boilers for marine steam engines.Used to provide steam at a greater unit pressure.If the new type of boiler is successfully imitated, it can provide the basis for the manufacture of a more powerful steam engine.After all, the power provided by a 500-horsepower steam engine is still too low.

After reviewing the information, everyone decided to follow the old road of technological improvement in history to trial-produce a fire-tube boiler, which uses a cylindrical shell and flue. The unit pressure provided by this boiler is far better than that of the Lancashire boiler, so that The original cast iron pipes must be replaced with low carbon steel pipes to ensure safe operation. 9.30.2011
(End of this chapter)