Monthly Archives: April 2017

Crucible Induction Melting Electric

Induction crucible furnace designed for melting and overheating of steel and cast iron. Possible melting of nonferrous metals (bronze, brass, aluminum) and their alloys in a graphite crucible. It is used in foundries, steel factories, workshops precision casting and repair shops engineering plants to produce steel castings of high quality. Induction heating – heating bodies in an electromagnetic field due to the heat of the vortex electric currents flowing through the heated body and excited in him due to the phenomenon of electromagnetic induction. When the current in the heated product is called induced or induced current. Induction units called electrothermal devices for induction heating or melting metals. Induction furnace, induction melting furnace – electrothermal equipment for melting materials with using induction heating.

Induction furnace operates on the principle of the transformer, whose primary winding is water-cooled coil, secondary, and at the same time load – located in the crucible of metal. Heating and melting of the metal takes place due to the currents flowing in it, which is caused by the electromagnetic field generated by the inductor. Electric consists of the smelting unit and equipment set. Melting unit is designed in a supporting frame consisting of two racks welded construction site "setting inductor" and the two hydraulic rams. Inductor consists of two sections, each of which a multiturn coil water-cooled, made of copper rectangular tube. Supply to the inductor power and water by using water-cooled flexible cables connected to it sequentially.

Hydraulic rams provide slope to drain metal furnace at an angle of 95 for 20 seconds. Managing tilt the furnace by an electric control valve, control panel, the slope of the furnace installed on site. Induction furnace is fed from the network through thyristor frequency converter TPCH, which is designed to convert three-phase industrial frequency AC high frequency. The main advantage of thyristor Electrically before is because of the lack of no-load losses reduced potreblaemaya power, increased efficiency, lower operating costs. Supply voltage converter comes from the transformer. Electric power is controlled by changing the voltage at the output of the converter and automatic frequency control in the smelting process. On front of the transducer placed controls, security alarm and control of the converter. In the control cabinet and authorities are signaling the remote control thyristor converter and control equipment and alarm systems. The cabinet mounted cooling water monitoring sensors and alarm systems cooling electric furnaces and condensers. Status of the lining of the crucible is monitored visually and by periodic measurements of the inner diameter of the crucible. Control over the work by using electric instruments and controls, located on the cabinet front panel controls and alarm systems. Main advantages of induction melting furnaces ITPE: In the manufacture of ovens used new clean and high quality materials, asbestos is not used. More robust components – Czech and German mid-capacitors. In furnaces used reliable thyristor frequency converters a new generation of automatic frequency control during melting. High power of fusion. Calculated and optimized selected inductance of inductors and trunk capacity of capacitor banks, the losses in the furnace circuit is minimized, resulting in achieved: higher productivity, greater efficiency in energy consumption, higher efficiency furnaces. In the production of electric current applied advanced technology. Rods of hydraulic cylinders are protected from the metal spray. Significantly increased and reliable operation of the furnace. Increased safety of operation of furnaces. In the design and manufacture of products focused on improving the effectiveness of protection equipment, and accordingly it standards of safety.

The Test Results Bucket Active Action

At the entrance tooth excavator bucket in a layer of frozen ground attack units included in the action, but not always worked at the same time all three units, since a decrease in the teeth of the efforts going on a short-term alternate disabling one of the blocks. Energy intensity of the development process of frozen soil scoop active action powered by a compressor was 0.111 kWh/m3, powered by two compressors – 0.081 kWh/m3 and serial Bucket dredge in non-frozen ground – 0.026 kWh/m3. Location shock of teeth on the cutting edge of the excavator bucket, selected on the basis of earlier studies (distance between axles 350, the tooth width 150 mm), guarantees constant contact with the edge of the array intact, as evidenced by the experimental values of the resistance force digging. During the development of frozen soil using a single compressor station pressure dropped from 0,7 to 0,4 MPa. The energy shock pnevmomolotov decreased, there was an increase of emerging efforts and had to decrease the thickness of the destroyed layer. If you have two compressor stations essential pressure drop was not observed, however, when performing other operations Excavating cycle compressor stations used inefficiently. Therefore, the results of the trials was asked to use one compressor station with a receiver. For more information see Brad Pitt. Calculations showed that for average soil conditions are sufficient to have a receiver volume of 2 m3. When working on the frozen ground on the track excavator to install the spikes, available in the maintenance kit, to prevent sliding tracks on the soil surface and fall to the bottom dredge.

Housing System

Energy conservation in new and old homes. In recent years, energy conservation – the main topic of conversation, but most people think that this applies only to industrial giants, and a spacious office buildings. For more information see this site: Peter Thiel. For what it is ordinary residents of apartment buildings? If you look at this situation from another angle, it becomes clear that the area housing – an area where electricity consumption is very high, so the energy-saving technologies should be primarily used here. Today the problem of saving energy in Russia is very serious: Burst crisis will affect costs, and most residents once again will have to live with austerity, paying huge bills like here to recall not saving and the potential savings? To ensure the operation of appliances in a standard high-rise building spent about 1 / 3 of electricity consumed, the rest of goes to heating and hot water. During the construction of new homes energy-saving technologies used in the past few years. Heating system attached particular importance: to save the heat on the order of heavier than to reduce the cost of lighting, so the main effort of designers and builders are intended to make the apartment warm. Increased insulation apartment allows you to set is not as powerful equipment for heating the house. In this case it is possible to mount the battery smaller and change the operation of the heating system as a whole. Depending on the type of heating system you need to consider building insulation inside or outside.

Maintenance, Diagnosis And Repair Of Centrifugal Machines

Maintenance of centrifugal machinery in the chemical and petrochemical production is based, as a rule, on the application of the planned preventive maintenance (BPD). Repair of equipment for This is carried out in accordance with the schedule of cpd a year or more. A major shortcoming of this service is that each of the centrifugal machine has certain peculiarities design and operation, so its failure may occur long before the date of repair, planned in accordance with the spr, and vice versa, the equipment is often displayed in the repair of prematurely when the resource of its elements have not yet worked out. To ensure trouble-free operation of machinery with a simultaneous increase in its turnaround, as well as to reduce operating costs appropriate to transfer technology installation on-condition maintenance, ie, the system of planning and diagnostic repairs (SPDR). This article is devoted to problems of organization of operation, diagnosis and repair of centrifugal machine equipment of refineries on the technical condition. First of all, the article applies to maintenance of centrifugal compressor machines (CCM), centrifugal pump units (TsNA), centrifugal ventilation units (CVA), blowers, smoke exhausts, superchargers, air coolers, motors, drive turbines, operated in routine conditions. Maintenance and repair of machinery equipment maintenance as a single interconnected system, which includes: – every shift system maintenance, monitoring and recording of equipment, conducted on place of operation – the system of continuous and periodic monitoring of the characteristics that define the technical conditions – the system output in the repair and determine its extent on the parameters of technical condition of the centrifugal machines – a system of accumulation, analysis and processing of diagnostic information for the timing of the withdrawal in the repair and determine its volume. .

Classification Criteria For ACS

ams classification strongly depends on the classification criteria. By the form used by the control device information distinguish open and closed ACS: in open systems there is no feedback between the output of control object and the input control device. In such systems, value-driven not controlled. If there is a feedback facility management and control unit form a closed loop provides automatic monitoring of control object. By the nature of changes in the driving influence of acs can be attributed to the following types: automatic stabilization, giving the effect that constantly, and these systems are designed to maintain consistency of some physical parameter (temperature, pressure, speed, etc.), program control, giving the effect that changes in any previously known to the law (for example, a given program can be modified speed motor drives, change the product temperature during heat treatment, etc.) tracking, giving the effect which varies according to the arbitrary, a priori unknown to the law (used to control the parameters of the control objects in the external conditions). In recent years, are becoming increasingly important adaptive control systems, characterized by action on the object of management of any completely unknown factors. As a result, the need to solve the control problem under uncertainty of input data for decision on control actions. These systems can adapt to environmental changes and the object management, and improve its performance as experience is gained, ie information on results management.

In turn, adaptive process control are divided into: the optimal, which provide automatic maintenance of the facility management of most advantageous mode, self-tuning, the parameters of the control object which is not remain unchanged, and converted to a change in external conditions, self-organizing, algorithm which does not remain unchanged, but improved when the parameters of the object management and external conditions, self-learning, which analyze the experience gained object management and on this basis will automatically improve its structure and method .Po nature of the acs is divided into continuous and discrete actions. In the continuous process control for continuous variation of the input signal also varies smoothly and the output signal. In the discrete process control for continuous variation of the input signal output signal changes abruptly. Management methods based on the use of digital technology, always lead to discrete control systems. By the nature of change the tone settings of acs can be divided into linear and nonlinear, steady and unsteady. By number of parameters themselves ams are one-dimensional or multidimensional (multiparameter). It should be noted that the classification of the acs can also be constructed on the basis of other criteria, for example, can be classified by acs the physical nature of the system or its major parts, the power actuator, etc. Each of these methods of classification of acs is often independent of the others. This means that each of them can be represented as a scale in a multidimensional phase space, while the specific process control in this space will correspond to points or certain areas.

Bluetooth

Earpiece – it is a micro radio station, located directly in your ear canal. Microscopic size and skin color do priborchik completely invisible, but, despite the enormous reticence in the work to remove it it is not difficult – to each of a hidden earpiece attached finest woods, pulling you Earpiece comes out. Continue to learn more with: Naveen Selvadurai. Further, through the headset (model of the micro 'student' or 'Manager') or via Bluetooth (Model hidden earphone 'Elite' or 'Elite Suite') hidden earpiece connects to your mobile phone. In the first case, a cell must be placed in your pocket, while the latter may be, say, remotely in a bag. There is also a model of the micro 'Hammer', whose character does not work on cell phones, and on ratsiyah supplied in the kit. If a relationship with someone who has the ear spy earpiece is on cell phones, connection is possible from anywhere in the world. For example, you can at home to help his friend to pass the exam on the other end of town, but we must remember that a connection on a cell phone will have at least a little, but to pay, plus a danger of having the exam room suppressor cell phones, in this case turns out to be indispensable model 'Hammer', because the cellular jammers on the radio do not work, and money from the account of the relationship is not written off, but communication range between the radios may be restricted by various parameters, including power. So, in your ear hidden micro earpiece connected to a mobile phone or walkie-talkie, you can take it for your friends and respond to them through the built-in microphone.

And it is absolutely invisible for prying eyes. Who will benefit hidden Earpiece? In the first place – it's students. After all, in fact, Earpiece – this is a real simple crib of our time, indispensable for the exams, tests and lab work. Just a wireless headset is very helpful in negotiations and business meetings. Sometimes you need to obtain prompt advice or information and does not show it, what would your business partner would not suspect you of incompetence. Invisible earpiece useful business and just business people. Miniature earphones can also use the chance people during the games (cards, casinos, etc.) for secret negotiations with a partner. Bank tellers, security guards, drivers and so on.

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