A new factory and supporting production are on the way in the Fenggu Industrial Zone, and companies in the new city are not idle either.
The Locomotive and Rolling Stock Factory and Xincheng Heavy Industry received the task a few months ago to build motorcycles.
It's not a motorcycle, it's a car that runs on land.
No matter what kind of food they have, they will not be allowed to go through hundreds of years of development in one go. The car they want to build this time is still within their capabilities.
Steam and electric cars.
The steam of cars is the steam of steam. Before the emergence of fuel vehicles, it was the only vehicle that could be said to be popular.
Electric vehicles based on lead-acid batteries appeared earlier than fuel vehicles. Due to road conditions and battery life, they are mainly used for urban mobility. They are not popular and are just a flash in the pan.
Among the two types of vehicles, the focus is still on steam vehicles. The exploration of electric vehicles is mainly to pave the way for the power grid system.
Because of the experience in producing steam locomotives, the research and development of steam locomotives should not be difficult. However, the task requirements issued by the above are relatively high, and the carrying capacity must reach three tons, which is still a bit reluctant for road steam vehicles.
Benz, who is now the deputy director of the General Locomotive Factory, led people to conduct some experiments on heavy-duty railway locomotives, and at the same time assembled two teams to tackle steam locomotives and electric locomotives.
After several rounds of experiments, it was determined that a steam car could not grow like a steam locomotive.
It seems like nonsense, but it is very important, because people are easily influenced by experience and habits, and may reach a dead end.
Even if the driver on the railway cannot see the front, it will probably crush people. The special railway track format determines that except for those with intellectual disabilities and those seeking death, no one will run up there intentionally.
There are also pedestrians, animal-drawn carts and handcarts on the road. Like a steam locomotive, there is a big lump in front. Although it can provide sufficient power, the driver cannot see the people in front of him. He doesn't know how many people will die if he drives over them. The driver may have been beaten several times by those who came for revenge.
Therefore, to maintain a certain power, make the cylinder smaller.
Fortunately, they had accumulated a lot of special experience when building steam locomotives. The team knew that to make the cylinder smaller and maintain sufficient power, it was best to use a seamless hot-rolled cylinder block.
Welding... Even with the recent availability of high-pressure bottled oxygen, the strength of acetylene welding is still far from seamless forging technology.
The seamless hot-rolled cylinder can withstand ridiculous amounts of air pressure.
Steam locomotives currently running on the railway have a standard speed operating steam pressure of less than one MPa. Oh, ordinary citizens in this unit haven't learned it yet, but it doesn't matter. People in pressure vessel factories, locomotive factories, and heavy industries can understand it. One megapascal is ten kilograms per square centimeter.
In contrast, the measured effective pressure of the high-pressure cylinders made by Xincheng Heavy Industry's three-axis hot rolling mill specially tailored for the pressure vessel factory is 12 MPa. Due to the equipment capacity, no higher pressure can be added. Now, the pressure vessel factory is trying to charge it to explode or until it bursts to determine the maximum pressure value.
This means that using seamless technology to produce the pressure cylinder of a steam vehicle, even if the diameter is larger, it will definitely be able to withstand a pressure of three to five MPa. However, this pressure is more dangerous to the driver and should be controlled to 2 to 2.5 MPa. By relatively reducing the wall thickness of the cylinder, about 80 horsepower can be obtained with a weight of more than half a ton.
Horsepower is used for horse power. After the electricity is used in Fenggu, the direct calculation of electrical power no longer refers to the camel beast. One horse has an output capacity of one thousand watts. It is simple and easy to understand without conversion.
The steam mechanism, plus coal burning, water tank storage, backup water, driving mechanism, transmission mechanism, a casing, including the wheels, the weight will probably exceed two tons, and three tons of cargo will be added, so the frame, The wheels also need to be strong enough and add weight.
The full load exceeds six tons. The team members calculated that 80 horsepower would be too small?
It's up to the deputy director to make the decision.
Adding more water to the noodles is definitely not enough, there must be a choice.
"Our goal is to replace the oxcart. Does the oxcart have speed? So we don't need to pursue the speed of the railway. It just needs to be slightly faster than the oxcart."
The horsepower is not enough, but the torque is enough to make up for it. The torque is large enough. Even 20 horsepower can drag a six-ton guy. 80 horsepower is enough to cope with some troublesome road conditions.
After determining the horsepower number, there is no threshold for the remaining things for senior technicians who have built steam locomotives. Then there is only one problem left - wheels.
If we push the time to two years ago, the wheels are actually not a problem. At that time, gravel roads were mainly used, so just get a steel wheel to run over it and it would be done.
However, many roads are now hardened with cement, and the road surface cannot withstand the use of steel wheels, and the friction is not enough.
What is needed is a material that can provide friction and assist in cushioning and protecting the road surface.
Leather is good, but it’s too expensive to make wheels. It takes forty or fifty layers to achieve sufficient cushioning, and leather is prone to rot if it’s used on too many muddy roads.
In the next two months, the steam vehicle team searched everywhere for materials suitable for tires.
There are many alternative methods, but many of them cannot be mass-produced.
After two months, only two types of tires could barely meet the requirements.
This tire is a steel wheel with a cork laminated tire, a special resin layer on the outside, and several layers of glue and final paint in between.
It works, but there are problems with durability. The team replaced the model car with hand-made tires and made the model car 20% overweight. After observing it statically for about three days, permanent deformation that can be measured with a ruler was produced.
Fortunately, the cost of this kind of tire is not high. Making the tire wider and reducing the pressure can also resist deformation. At least it is easier than feeding grass to cattle again and again. If there is no better one in the future, we can only use it and steel-core tires. Choose one.
Steel-core tires are even more outrageous. This was a sudden idea of someone in the steam car team. They directly use elastic yellow steel to make the wheel hub, and only need a layer of resin on the outside to protect the wheel hub from being directly worn, or it can be soaked in oil. A wear-resistant tarp will also work.
Everyone originally thought it was nonsense, but when they went to the iron factory for consultation, they said it could be done.
This type of tire has better mass production capabilities, but it also has a big flaw, that is, the performance difference between no-load and full-load conditions will become particularly large, because the spring plate can only meet the requirements of the maximum load overseas road conditions. Do it so that the tire will feel the same as a pure steel tire when unloaded, which is stiff.
The team can come back and do some calculations, or uu can read a book. We can overcome the problem by putting some effort into the frame suspension and prevent the steam mechanism from malfunctioning due to external vibrations.
Both tires have a lot of flaws, but they can both be used.
Benz decided to build two prototype cars, each with one type of tire and different frame suspension, and lend them to other factories for use. Anyway, there is no time limit for the task, as long as the companies are willing to buy them after mass production.
Compared with the success of the steam unit, the troubles of the electric vehicle unit are greater.
They had nothing to do in the past few months, and they were all helping other companies.
Lead-acid batteries have a lot of troubles with internal and external components. Fenggu Electric Power has been working on it for a long time but has yet to come up with a satisfactory and safer product.
Fenggu Electric Power Company was newly separated from Hongshi Magic Equipment Factory due to insufficient motor production capacity. It is also the motor supplier for the electric vehicle project. The trouble here is even greater. It does not know how to build small motors and needs Xincheng Heavy Industry. Send someone to help them find a solution.
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