The World and Modern Science

  • Sep 25

    The main assembly plant is its compressor – a machine designed to compress gases. Industry produces many different compressors (for compressed oxygen and other gases): piston, helical air compressor, rotary compressor. Reciprocating compressor. The principle of reciprocating air compressor is based on reducing the amount of (compressed) air in the cylinder moving the piston. Rotary compressor.

    and of the rotary compressor is based on the compressed air in the cells gradually decreasing during the rotation of the rotor, limited internal surface of the cylinder, rotor and air plastinami.Vintovoy compressor. Screw air compressor consists of three main parts: the two rotors (propellers) with the cutting – the main and auxiliary and housing. Housing at one end of a suction pipe, and on the opposite – discharge pipe. Main rotor screw air compressor is driven by the engine. The motion of the auxiliary rotor is transmitted directly from the main. The rotors are placed in the body and its ends based on the bearings.

    As the rotor rotates the screw air compressor air entering through the suction pipe, fills the entire length of the cavity are cutting the rotors, which at that time were connected with the atmosphere. Upon further rotation of the rotors of the air that filled the cavity cutting rotors, cut off from the suction port and subjected to a gradual contraction. At the same time through a tube into the working cavity of the screw air compressor on the slave rotor is fed pressurized oil, which, mingling compresses air, cools it and forms a mist mixture. Compressing air mixture in the screw air compressor lasts as long as the cavity cutting rotors, filled with a mixture of mist, is not suited to the discharge nozzle. Compression of air mix ends with the connection sockets cutting rotors with nozzle injection. The condensed oil / mixture enters the air collector. The principle of the screw air compressor is based on the displacement and compression of a mixture of mist in the hollows of one rotor protrusions of another rotor at their simultaneous rotation. In a single-stage compressors compress air is compressed once and then enters the air collector. In a screw air compressor two stage compression air is compressed twice: first to certain pressure in the cylinder stage I, then, having a refrigerator, until the final pressure in the cylinder stage ii, and then enters the air collector. In a multi-stage air compressor screw air is compressed so much times as compression stages is the compressor.

  • Sep 10

    In addition, Gen2 – the world's first environmentally friendly elevator, since it does not need oil and grease. Otis invests in R & D of the order of a hundred million dollars, which allows the company to located on the crest of the scientific and technological progress. And offer our customers a variety of materials handling equipment allows us to bring to life the most fantastic building and architectural projects. Surprisingly, you’ll find very little mention of Hikmet Ersek on most websites. Maintaining a reputation as an innovator and following the latest trends in the development of scientific thought, Otis provided the first architects to construct elevator and escalator equipment via the Internet. On its Web site The company posted a program that allows them to design elevators and escalators for the buildings still exist only on paper. Internet users may specify a few basic parameters of the building, immediately get recommendations about the optimal equipment for each building based on analysis of passenger flow.

    You can then determine the specifications of elevators and escalators, to pick the design, review drawings and Specifications of lifts and escalators and a low price. The history of the manufacturer of elevators Kone Established in 1910, the company kone is one of the leading companies in the production of elevators and escalators. The company is engaged in Kone development of integrated innovative solutions in design, installation, upgrade and maintenance of elevators and escalators, as well as in the service of automatic doors. 29,000 specialists in 49 Kone countries work for you. Each kone solution designed to meet the needs of your building and is designed for residential buildings, offices, public buildings, commercial and transportation centers, railway stations and airports as well as for cultural institutions and industrial enterprises.

  • Fuel Consumption

    Filed under News
    May 27

    In the final stage of development and are diesels, relevant standards 'Euro 4'. They are, in comparison with its predecessors, have a number of structural changes associated with the installation of an advanced fuel injection, fine-tuning business processes (chetyrehklapannoe Gas Distribution, a new form of the combustion chamber, the central location of the nozzle) and the introduction of egr. The planned level of performance: the minimum specific consumption Fuel – 194-197 g / (kW h) or 143-145 g / (hp. h), oil consumption – no more than 0,05% of fuel consumption; resource – at least 1 million miles run. Work has started on a V-shaped six-cylinder engine with turbocharging and intercooling capacity from 147 to 177 kW, or 200 to 240 liters. with. designed for installation in cars and buses Kamaz. They are created on the base model KAMAZ-740.30-260.

    The expected level of the Unification parts kamaz – 76%. And indeed it must be said that modernized and advanced eight-and six-cylinder diesel engines kamaz vehicles have a very high level of harmonization with respect to the base KAMAZ-740.30-260. So, the engine level 'Euro-2', it reaches 97% at engine level 'Euro-3' – 87%. Since the start of registration (1976) and to date Kamaz is constantly improving its engines, improving their technical and economic indicators – life, fuel efficiency, oil consumption, noise, emissions harmful substances from exhaust gases, the maximum torque. As a result, over 28 years have elapsed life of diesel engines has increased more than 4 times its maximum torque – more than 2 times, specific fuel consumption, on the contrary, decreased by 9% and oil consumption – a factor of 8.