On September 30, Chengdu Shuangliu, China's first lithium battery power pack empty iron line in Chengdu double stream.
The world's first lithium battery power pack iron "Sichuan made"
The white body, the black round "ear" plus the big dark circles, the sprouting giant panda "skin"... You are not mistaken, the aerial train that will appear in the cartoon, it was really in Chengdu Shuangliu yesterday morning. The district "flyed up".
On the morning of September 30, the first domestic new energy-suspended airborne traffic test line jointly developed by Southwest Jiaotong University and other units was unveiled in Chengdu. The first new energy empty iron developed by China was successfully linked, which means Another new mode of transportation is born in Sichuan.
Yan Ming, an academician of the Chinese Academy of Sciences and the chief professor of Southwest Jiaotong University, is the chief designer of the project. He said that in the future, the new energy empty iron will shuttle between the cities in the form of suspension. With the world's first empty iron rail line using the large-capacity lithium battery power pack as the power source, the "Panda Air Railway" no longer needs to hang high voltage. The power supply grid will become a beautiful landscape in the city. The related technology creatively replaces the high-voltage power of the lithium battery pack for the traction power of the train, which is the first in the world.
Staff debugging empty iron
Is "Panda Air Iron" safe?
Will not derail, fully guarantee operational safety
“Vehicle safety is very high. The bogie and lithium battery power pack are placed inside the closed box rail beam. The vehicle running mechanism is always enclosed inside the box rail beam and will not derail.†Yan Ming introduced that the train runs in the air. It also does not collide with other objects, which fully guarantees the operational safety of the system.
"Panda empty iron" has many advantages?
Low noise, small footprint, basically no pollution
"Panda empty iron" has many advantages. The wheels are wrapped in rubber and the running noise is extremely low, which is basically no pollution to the surrounding environment. The new energy empty iron is set in the air through the sturdy and lightweight column, the floor space is small, the demolition amount is small, the maximum slope of the line is 10%, the minimum turning radius is 30 meters, and the terrain adaptability is also very strong.
Due to the short investment period and the construction cost per kilometer, it is only one-sixth to one-eighth of the subway. Modular manufacturing and process assembly are adopted. The construction is simple and the construction period is short. All the projects can be put into operation within one year.
In addition, the new energy empty iron transportation capacity is moderate and fast on time, the train has a top speed of 60 kilometers per hour, flexible grouping, and the maximum capacity can reach 20,000 people per hour.
Where is the "Panda Air Iron" used?
Traffic-intensive specific sections and tourist attractions
Empty and bright in the empty iron car
New energy, empty iron, so good, which areas of the city can be used? Yan Ming told reporters that the specific road sections and tourist attractions with dense urban traffic are the places where the empty irons "show their talents."
“Because of its air-laying and small footprint, the empty iron can even be erected directly on the green belt without changing the traffic design of the ground. Because of its high speed and high altitude, it is used as a means of connecting attractions and airports. The empty iron will be the best choice for the future.†The dressing of the panda iron has attracted many netizens to praise, and Ming Ming pointed out that the empty iron can be modified according to the local humanities elements according to the local subway platform. Very flexible.
New mode
"Panda Air Iron" successfully hangs the line
Support column propped up 300m test track
Support column propped up 300m empty iron test track
The white track piles hold the white track, and the black and white, panda-shaped empty iron hangs on the track and waits for the line to hang. Inside the empty iron, the dark blue handle, the light blue and blue seats echo the white doors and windows, and they are bright and fresh.
“The empty iron is the suspended air monorail transportation systemâ€. The staff at the event site introduced that, unlike the subway and the tram, the track of the empty iron is above, and it is a type of rail transit that runs on the air track. The new energy empty iron of the line is the air-suspended rail train with lithium battery as the traction power.
The reporter saw at the scene that the entire test line was 1.2 kilometers, covering various road conditions and facilities such as gentle slopes, corners, stations, charging stations, etc., to meet the needs of the entire system test. The "Panda Air Railway" uses 300 meters. The test track beam, about 8 meters above the ground, is supported in the air by a support column spaced 10 meters apart. At present, the construction of the test line has not been completely completed, but a prototype of about 300 meters has been built. After the train is hung, some preliminary inspections can be started.
It is reported that the new energy empty iron project was initiated by the Zhongtang Air Rail Group to research and develop and invest. "Although we did a lot of work in the early stage, we only spent less than half a year from R&D to today." The chief designer of the new energy empty iron, Yu Ming, introduced to the reporter of Huaxi Dushi.
It is understood that after the hanging line enters the commissioning stage, the speed of the "Panda Air Railway" will reach 60 kilometers per hour, which is similar to that of the ordinary subway, and the maximum carrying capacity of an empty iron is 230 passengers. The 14 patents and 38 proprietary technologies owned by the New Energy Air Rail Project are the first in the world to complete the key technologies and series of vehicle models for airborne orbital trains, and are the first to enter the field of China's empty iron manufacturing.
new momentum
Lithium battery power pack as power source
"Lifetime" up to 4 hours
In fact, similar rail traffic is not new. As early as 1898, Wuppertal in Germany built the world's first monorail suspension railway system on the Upa River. In 1903, the whole line was opened to traffic, and the line was 13.3 kilometers long. For centuries, this safe, applicable and economical mode of transportation has been used by many cities such as Germany and Japan.
China is the third country to master this technology after Germany and Japan.
“Sichuan’s new energy empty iron has made significant improvements on the basis of the former, becoming the world’s first empty iron that uses a large-capacity lithium battery power pack as a power source.†Eliminating the suspension of high-voltage power supply grids, the presence of empty iron will make the city It is more convenient to live and become a beautiful scenery of the city. "Yu Ming said.
According to reports, in addition to no high-voltage power transmission and transformation equipment, lithium battery drive also has the advantage of no exhaust emissions, according to the power requirements of the number of passengers, the new energy empty iron lithium battery operation time can be up to 4 hours. At the large platform, charging piles will be provided to meet the long-term operation of the empty iron.
After the successful completion of the line, the new energy empty iron will enter the commissioning period, and Yan Ming revealed that the "Panda Air Railway" is expected to conduct operational tests one month later.
Low-pressure Casting Parts
Low-pressure casting was the earliest anti-gravity casting technology, which was first used in industrial production in the 1940s. Nowadays, low-pressure casting is mainly used in the production of aluminum alloy and magnesium alloy parts, such as the automotive hub of the automobile industry, the cylinder body, cylinder head, piston, missile shell, impeller, air guide wheel and other castings with complex shapes and high quality requirements.
The common material of low-pressure casting is A356\ZL101\ZL101A,this kind of material is usually applied to auto part, storage part,transformation part,etc.
The pressure on the surface of the molten metal is 0.06~0.12Mpa.This processing has good shrinkage, casting tissue is dense, easy to produce the large thin-walled complex parts, the casting head is not needed , metal yield can be up to 95%.
Low pressure casting can adopt sand type, metal type, graphite type, etc. The filling process is not only different from gravity casting such as metal casting and sand casting, but also different from high pressure and high speed filling pressure casting, which has the following advantages:
1) Pure metal liquid filling type, which improves the purity of the casting. Because the slag generally floats on the surface of the metal liquid, and the low pressure casting by the metal liquid in the lower part of the crucible realizes the filling through the lifting pipe, which completely avoids the possibility of the slag into the cast cavity.
2) The metal liquid filling type is smooth, reducing or avoiding the turnover, impact and splashing phenomenon of the metal liquid when filling the type, thus reducing the formation of less oxide slag.
3) The casting molding performance is good, the metal liquid filling under the pressure action, can improve the fluidity of the metal liquid, is conducive to the formation of clear outline, smooth surface casting, for the formation of large thin-wall casting is more favorable.
4) The casting crystallizes and solidifies under pressure, which can be fully condensed, and the casting structure is compact.
5) Improve the yield of metal liquid, generally do not need to burst, and the same metal in the lifting tube can be returned to the crucible, reuse, so that the yield of metal liquid greatly increased, the yield can generally reach 90%.
6) Convenient production and operation, good working conditions, high production efficiency, easy to achieve mechanization and automation.
Low pressure casting also has some disadvantages, equipment and mold investment is large; in the production of aluminum alloy casting, crucible and lift pipe long time with metal liquid contact, easy to erosion and scrap, will also make the metal liquid iron and performance deterioration.
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NINGBO ZHENHAI BOLANG METAL PRODUCT FACTORY , https://www.diecastingdie.com