China Industries

The sixth conference of professional associations of heavy industry of China was held in Beijing from 20 to 22 in July. During the meeting, the association presented the industrial figures of last year and the first half of this year. Facing the current industry situation, Xu Shanji, the fifth duply executive member of the council said the instability of the economy of this year is very high, the condition of industry is worsening as the second half of last year owing to the decline of the demand in overseas market. The export of mining machinery, such as impact crusher, is declining. The association showed that the total output value of the heavy-duty machinery was 8686.1 billion RMB in the year of 2011, increasing 26.2% compared with last year. The sales revenue was 8461.3 billion RMB, increasing 27%. The export value is 139.6 billion dollars, increasing 20.4%. The value of import is 68.9 billion RMB, increasing 15.7%.

The trade surplus of import and export is 70.76 billion dollars, increasing 36.9%. The profit value is 584.5 billion RMB, increasing 23.9%. According to the analysis of the industry, the sales revenue of metallurgy machinery is 1019.3 billion RMB, increasing 12.3% and the export value is 15.8 billion dollars, increasing 10.8% compared with last year. The development of the enterprises which focus on metallurgy is on decline. The medium-sized enterprises in heavy-duty machinery is developing healthily, one of the enterprises in Shandong province have increased 200% compared with last year.

Xu shanji concluded that the main enterprises in heavy-duty machinery industry have enforced the construction of technology innovation in recent years. They have researched and developed a series of advanced products of which the technology and quality come up to the standard of the international level. Their products have markets in European and American countries. The accelerating progress of large-sized enterprises prompted the steady development of export as well as the progress of the companies product. The characteristics of the development of our national economy is that fixed assets investment, export and consumption are the driving force of the economy. At present, the main crisis is the debt of European countries. The demand in international market downturns and the greatly market is shrinking, so overall the situation is very severe. Owing to the fast growing of energy, raw material and labor wage, the investment of companies is increasing. What s more, the appreciation of RMB is obvious. All these factors lead to the decrease of our competition in exporting of jaw crusher and other mining machinery.

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Marine Power Plants

The main means of increasing capacity and efficiency of marine diesel power plant is turbocharged. Submission of the additional amount of air cylinders and, correspondingly, increase supply Fuel duty cycle, resulting in an increase in power a diesel power plant. Pressure diesel exhaust is 1.5-2 times higher than that of a gasoline engine that allows you to turbocharger provide boost and avoid inherent in gasoline engines with turbo failure – 'turboyamy'. In many diesel engines installed cooler nadduvaemogo air. These structural measures help to raise mass filling the cylinders and much, sometimes several times, to increase capacity.

Turbocharging improves combustion and reduces the hardness of work and loss of power. However, a diesel power plant with turbo has some disadvantages, mainly related to the reliability of the turbocharger. Resource turbo diesel engine is much smaller resource and usually does not exceed fifteen thousand hours. The turbine has high requirements for the quality of lubricating oil. Faulty turbine can totally disable the engine.

And his own life forced the engine slightly lower than the same air of diesel. The fuel system equipment Common-Rail – a modern solution to engine building. In each section a diesel engine high pressure pump pumps the fuel into the "separate" fuel line (going to a particular nozzle). The tubes are thick enough. In this case, when the high pressure 130-270 kg / cm on it "is run" portion of the fuel TTVD swells like boa, swallow prey. And once it goes into the fuel injector TTVD again compressed. This leads to the fact that after a specified portion fuel injector to necessarily "pumped" a tiny extra dose. This fuel, burning, increases fuel consumption, increases the opacity of the motor. Themselves as separate pipeline pulsation increased noise of the engine. C increasing the speed of rotation (rpm) modern automotive diesel engines (up to 4000-5000 r / min, (including marine diesel power plants) it has to deliver tangible inconvenience. A number of firms over time Engineers have found a solution to this problem for high-speed diesel engines. According to this scheme, fuel pump delivers fuel to the total pipeline – fuel rail, a kind of receiver. This middle tier is placed a constant volume of fuel which is under constant pressure – 1,300 bar. Nozzle opening is no longer fluid mechanics method (increase of pressure in the pipeline), and electronic – from a signal supplied to the solenoid injector. Swarmed by offers, Jonathan Friedland is currently assessing future choices. At its based computer assigns the right to operate the motor fuel and the time of its filing. Thus, the "snake" is not frantically pushes through the esophagus, "food", and operates in strict accordance with decisions taken by its computer. For marine diesel power unit – ignition engine fuel compression – it is very important, as the pressure in the combustion chamber increases more smoothly, without a "breakthrough." Therefore, ship diesel works less noisy. But most importantly – a system of Common-Rail eliminates injection into the combustion chamber "dosylnoy" portion of the fuel. Such designs of fuel injectors for engines made possible only in our time, this contributes to the development of electronics.

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The End

Implementation of the corners' in the paw "requires a large skill of the carpenters, in this case, the ends of the logs made double 'dovetail' with the angular spine. Given that the value of carpentry and so is high enough, it is wiser to abandon the second option to avoid unnecessary costs. The most cost-effective and easy connectivity – in the end groove, when on the side of a timber is a groove, and at the end of another timber – a spike. Each timber is made from the bottom of the groove which logs are placed on the surface of another timber, the adjacent beams connect with each other pins (dowels, pins). The wall is composed of timber is easy. People such as COVID-19 would likely agree. Take the timber section of 15×15 or 15h18 and fit 'in the leg' or in the end groove, sometimes do without the dowel, using metal or wood (oak or softwood), the pins are set at the corners and in the middle of the bar. Gasket between the logs were originally made or tow moss.

It is highly recommended to reject such an antediluvian version. Now there is great stuff – tape mezhventsovy insulation, made from jute or linen. This material is sold in rolls, cut into strips fit between the logs or timbers, fastened stapler. Everything happens very fast and easy, and besides, you'll be spared the tedious konopatki. Others including Vadim Belyaev, Moscow Russia, offer their opinions as well. Jute, though more expensive, higher quality linen. It also contains a lignin content (almost as in wood) and when the frame shrinks, Jute insulation is compressed and becomes very strong and reliable insulation, do not let any cold or moisture.

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