Device for electromagnetic processing liquid

 

(57) Abstract:

The invention relates to a device for electromagnetic processing liquid and can be used in various industries for magnetised water systems with simultaneous electroaparataj. The device contains within the enclosure three-phase stator winding that generates a rotating magnetic field and the rotor. The rotor is supplied with three-phase multiturn winding and rectifier consisting of semiconductor valves (diodes) mounted on insulators on the rotor shaft. The ends of the rotor winding connected to the rectifier, the output of which is connected with mounted on insulators on both ends of the rotor conductive, non-insulated from electrical contact with the treated liquid electrode plates. The rotor is stationary. The stator and rotor windings, a semiconductor rectifier valves and electric connection of the windings of the rotor rectifier sealed and electrically isolated from the treated fluid. The technical result - improving the efficiency of electromagnetic processing liquid. 3 Il.

The invention relates to a device for electromagnetic (magnetic) processing the simultaneous electroaparataj, for example, in power, chemical, mining, metallurgy, building materials.

A device for electromagnetic (magnetic) processing fluid [1], comprising a magnetic system in the form of a stator of a set of electrical steel sheets in the slots which are stacked winding fed from three-phase current source, and the rotor also from a set of electrical steel sheets with grooves, in which the stacked winding in the form of hollow diamagnetic tube of conductive material, closed at the ends by the flanges of the conductive material similar to the squirrel-cage rotor induction motor of the type "squirrel cage". Tube communicated with the input and output cavities for inlet and outlet of the treated fluid, which flows through the tubes and subjected to processing the magnetic field generated by the stator winding (SU 1188106 A, class C 02 F 1/48, 1985).

In this device, the winding of the stator creates a rotating magnetic field, which rotates the rotor winding pipe, so the liquid is subjected to processing as magnetic stator field and the induced current from the field electromotive force (EMF) in the coil-pipe and zhidkosti with a frequency of 50 Hz.

The main disadvantages of this device include the fact that the working magnetic flux passes mainly through steel stator and rotor and the air gap between them, weakly penetrating inside diamagnetic tubes and the current liquid in them, as their magnetic resistance is large compared to other parts of the magnetic circuit of the device.

In addition, the induced rotating magnetic field, the current flows mainly through the tubes, not liquid, because the electrical resistance of the tubes is negligible compared to the resistance of a fluid (liquid conductors) in the tubes.

These drawbacks reduce the effectiveness of the treatment liquid in such a device.

It is also known a device for electromagnetic (magnetic) processing fluid [2] is a prototype, comprising a housing which has a stator from a set of electrical steel sheets in the slots which are stacked winding similar to a known stator three-phase asynchronous motor, a pressurized tank of liquid connected with inlet and outlet fittings, and the rotor is also made of a set of electrical steel sheets with grooves and teeth on the lateral surface the package steel stator, thus the outer surface of the rotor, including the grooves in contact with the treated liquid, covered with a layer of insulation, and the ends of the package steel rotor mounted electrically isolated from electrical contact with the treated liquid plate; capacity for liquids made (formed) of the compound in a solid, airtight construction, housing and stator winding, by connecting (bonding) their parts and impregnation of the winding, dielectric epoxy (or similar) compound, and the compound layer is covered with the steel bore of the stator pack and its grooves, and the thickness of this layer is made smaller (tens and hundreds of times), than in the area of the frontal parts of the winding and the boundaries of the device than, it will be seen, provides sealing and electrical insulation of the stator winding from the treated fluid (EN 2052917 C1, class C 02 F 1/48, 1995).

This design has a number of valuable advantages in comparison with other known devices, including the above-described analog, in particular, allows to obtain a high magnetic field strength in the fluid (600 kA/m or more at low energy costs, since the magnetic resistance is reduced on the rotor (due to the small size of the annular gap), and to increase the current flowing directly into the liquid in the interpolar space of the magnetic system of the device from the induced rotating or pulsating magnetic field EMF as excluded sotirova (leakage) current on the surface of the steel stator and rotor due to the presence on them of the insulating layer.

These factors contribute to the effectiveness of electromagnetic processing fluid, however, and this device has certain disadvantages, in particular the fact that the "winding" of the rotor, which in this device is formed by a volume of fluid enclosed in the container, the annular section of the interpolar space of the magnetic system of the device (between stator and rotor), including liquid conductors in the slots of the rotor, closed, mounted on the ends of the package steel rotor, electrically conductive, non-insulated plates, in essence, too, is a cage "winding" type a "squirrel cage", as in the specified similar [1] hollow diamagnetic tubes in the slots of the rotor, closed at the ends of the conductive flanges with the only difference that in the similar [1] "squirrel cage" formed hollow diamagnetic tubes, closed at the ends comprovide is a, conductive, non-insulated plates; that is, from this point of view, these windings are of the same type, although, of course its electrical parameters, such as electrical resistance, they are significantly different, as well as the end result of their use in an appliance designed for electromagnetic processing liquid.

As a short-circuited winding type a "squirrel cage" is a single-turn paths, the magnitude of the induced EMF in them small and is usually several volts (depending on the size and power of the magnetic system of the device), as well as in the prototype [2] the electrical resistance of the liquid conductors (liquid such as water) is large, then the currents flowing in the liquid is small (in the range of several amperes or less, depending on the capacity and design parameters of the device), which reduces the efficiency of electromagnetic processing liquid in such a device.

The aim of the present invention is to eliminate these disadvantages of the prototype and the efficiency of electromagnetic processing liquid.

This objective is achieved in that the rotor is supplied with the St the m rotor or the like, electromotive force (EMF) which ceteris paribus is proportional to the number of coils and can be obtained in a hundred (or more) times greater than in the single-turn (single) winding type a "squirrel cage", to obtain the maximum EMF at the ends of the winding, the rotor is stationary, and the ends of the winding with current in it an EMF is connected to the rectifier, consisting of semiconductor valves (diodes) mounted on insulators on the rotor shaft, or otherwise, for example in the cavity of the shaft and electrically insulated from the conductive parts of the rotor. The rectifier can be assembled by known circuits: three phase bridge or middle point and the other schemes; it seems that the three-phase scheme with the mid-point, which uses only three semiconductor valve, and has enough good features of the rectified voltage and current, the most suitable for this case, as well as the three-phase rotor winding, although in the General case can be used and other types of run windings of the rotor and other circuits of rectifiers.

The output of the rectifier, its plus (+) and minus (-) or medium point, connected with installed on insulators at the ends of the rotor (on both si electrodes, for example, in the form of annular plates of iron, aluminum and other conductive materials and providing at the same time (its geometric shape and size) necessary passage for the treated fluid.

In addition, the rotor winding, the semiconductor valves of the rectifier and electric connection of the windings of the rotor rectifier sealed and electrically isolated from the effects of the treated fluid, for example, by compounding, i.e. casting, impregnation, coating and gluing them into a monolithic, hermetically sealed structure, the dielectric resistant to prolonged exposure of the treated fluid, epoxy (or similar) compound, with a thin layer (but it is necessary and sufficient for electrical isolation of this compound is coated as an outer steel surface of the rotor, and all contact with the treated liquid conductive parts (shaft, bearings, cover and other elements) inside the unit, including the inner surface of the inlet and outlet fittings, in addition to the plate electrodes, electrically isolated (as mentioned above) from the conductive parts of the rotor.

Sealing and electrical insulation is maintained by, for example, the location of the rotor winding and mounted on the rotor, on insulators semiconductor valves and their electrical connections in the pipe shell (capsule) PTFE, fiberglass and other materials, followed by pouring into it from both ends, epoxy compound, sealant, for a full sealing and electrically isolated from the treated fluid.

In addition to these examples, sealing and electrical insulation of the windings of the stator and rotor may be effected by means of the winding of the wires in insulation that allow operation in the environment of the treated fluid, and sealing and electrical insulation of the semiconductor valves of the rectifier and the junction of the electrical connections with the winding - by applying (coating) on them a layer of insulation, but in this case, all conductive parts inside the device (the surface of the steel casing, stator, rotor, shaft, its bearings, caps and so on and so forth), including the inner surface of the inlet and outlet fittings, in contact with the treated liquid, must be covered with a layer of dielectric resistant to prolonged exposure of the treated fluid, epoxy compound, lacquer, enamel, except as Atarah.

Coverage of all live parts inside the unit dielectric compound, lacquer, enamel, that is, the electrical insulation of all live parts in contact with the treated liquid inside the device, except, of course, plates, electrodes made to ensure the flow of current from the induced rotating or pulsating magnetic field of the stator in a multi-turn winding of the rotor EMF through the rectifier to the liquid in the interpolar space of the magnetic system devices on a single plate electrode to the other and eliminate the flow of current through the other conductive parts in contact with the treated liquid inside the device. It is easy to see that the capacity for liquids in these cases, sealing and electrical insulation of the stator and rotor windings are formed (formed) inside the housing between the parts sealed and electrically isolated from the treated fluid to the stator and rotor windings and sealing of the device.

This set of essential features that are in relation to each other, namely the installation of the rotor is stationary, the supply of the rotor arranged in its grooves legalwise or pulsating magnetic field of the stator, with the rectifier, the output of which, the "plus" and "minus" (or the midpoint of the winding rotor) connected with mounted at the ends of the rotor, isolators, isolated from electrical contact with the treated liquid, the conductive electrode plates, sealing and electrical insulation of the winding of the rotor, a semiconductor rectifier valves and their electrical connections, for example, by compounding or otherwise, as well as the electrical insulation of all live parts in contact with the treated liquid inside the device, including the inner surface of the inlet and outlet fittings, except, of course, plate electrodes, improves the efficiency of electromagnetic processing liquid by increasing the electric voltage applied to the plates of the electrodes from the induced rotating or pulsating magnetic field of the stator voltage in the multiturn winding of the rotor, the ends of which are connected to the input of the rectifier, and the rectifier input from the electrode plates, and therefore the DC current in the liquid in the interpolar space of the magnetic system of the device, where the liquid simultaneously influences and intense magnetic field. At the but for the treated fluid in the interpolar space of the magnetic system devices on a single plate - electrode to the other through the insulation of all live parts in contact with the treated liquid inside the device, including the inner surface of the inlet and outlet fittings. To improve the efficiency of processing also contributes flowing in the fluid under the action of the constant current electrolysis process.

The invention is illustrated further by the example of his particular performance with reference to the accompanying drawings, which depict:

Fig. 1 - General view of the device (longitudinal section); Fig. 2 - section a-a (cross-section); Fig. 3 - scheme of connection of the windings of the rotor rectifier and electrode plates.

The device includes a housing 1, which has a stator 2 with the winding 3, arranged in the slots 4 of the stator 2. In this particular example, the stator 2 is a three-phase stator, similar to the well-known three-phase stator of the electric motor, powered by an industrial network with frequency of 50 Hz, although in the General case can be used with other types of stators (single-phase, multiphase, other types of power sources and the frequency of the current.

The stator 2 with the winding 3 is sealed and electrically isolated from processed denim compound 6, when this layer of the resin coated surface of the bore of the package steel stator and grooves.

As can be seen from Fig. 1, of a compound layer 6 covering the steel bore of the stator and its grooves, is made smaller than the area of the end parts of the winding 3 of the stator 2 and the boundaries of the housing 1 of the device that is made to reduce energy consumption (magnetizing current), ensure adequate sealing and electrical insulation of the stator winding and the steel bore of the stator.

Inside a sealed and elektroizolyacionnogo from the treated fluid 5 of the stator 2, concentric, with a gap for the passage of liquid 5 has a rotor 7 is laid in its grooves 8 multiturn winding 9, similar to the rotor winding of three-phase asynchronous motor with slip-ring rotor. The ends of this winding is connected to the rectifier, which is equipped with a rotor 7, which consists of semiconductor valves (diodes) 10 installed on insulators 11, according to the scheme shown in Fig. 3, the output of the rectifier, its "plus" and "minus" (middle point of the winding of the rotor), connected by means of insulated conductors 12 (electric connections) are installed on the ends of the rotor (on both sides) on insulators 13 conductive, non-insulated aolani (in the simplest case) in the form of flat annular plates, which to provide the same toward the interpolar space of the magnetic system of the device bore, have the same rotor outer diameter; can be made and other forms of plate electrodes, for example plate - electrodes of the G-shaped form, subject to the above conditions save orifice. The rotor 7 is laid in its grooves 8 multiturn winding 9, the semiconductor valves 10 of the rectifier and the electrical connection conductors 12, sealed and electrically isolated from the treated fluid 5, similarly to the stator 2 with the winding 3, a dielectric epoxy compound 15, with a thin layer of this compound, but sufficient for sealing and insulation, also covered the surface of the steel rotor.

As can be seen in Fig. 1, a container for liquid is formed (formed) between the sealed parts and elektroizolyatsionnyh from the liquid, the stator and rotor windings and sealing of the device.

The rotor 7 is installed and secured in the bearings caps 16 is stationary, which on its shaft 17 has a key 18.

Supports are made in the cover 16, which is equipped with inlet 19 and outlet 20 fittings.

In about Jamie parts inside the unit, including the inner surface of the inlet and outlet fittings in contact with the treated liquid, except for the plate electrodes 14, covered by a layer of insulation (not shown) is performed to create the conditions for passing current from the induced rotating or pulsating magnetic field of the stator EMF in the winding of the rotor, attached to the plate electrodes through the rectifier, the liquid in the interpolar space of the magnetic system of the device (from one plate electrode to the other) and to avoid the flow of current through the other conductive parts in contact with the treated liquid inside the device, offering maximum performance and maximum efficiency of the device.

Rubber gasket 22 is a sealing container and the device when the bolts 23 of fastening of covers 16 to the housing 1 of the device.

The device operates as follows.

When connecting the windings 3 of the stator 2 to a source of three-phase current produces a rotating magnetic flux (magnetic field), which is closed, passing through the steel of the stator 2 (the back and the teeth of the package), a layer of epoxy compound 6, pokrywy surface of the rotor, steel package of the rotor 7 (the teeth and the back), producing the magnetic treatment of liquid 5 in the interpolar space of the magnetic system of the device. In Fig. 2 the magnetic field lines shown by the dotted line. This field is characterized by a high value of its tension in the liquid (about 600-700 kA/m), that can be easily confirmed by calculation and practical data (it is known that the magnetic induction in the air gap induction motors reaches 8500-9300 HS), which enhances the efficiency of the processing liquid. In addition, the rotating magnetic field of the stator induces a three-phase winding 9 of the rotor 7 electromotive force (E. D.), as well as the ends of this winding, the current in it, EMF, is connected with the semiconductor valves (diodes) 10 rectifier, the output of which, the "plus" and "minus" (middle point of the winding rotor) connected to the electrode plates 14, then between them there is the tension under which the liquid 5 in the interpolar space of the magnetic system (in the annular gap between the stator and rotor) from one plate electrode 14 to the other will be a constant current whose magnitude is determined by the value attached to the plate - electrodes voltage (rectified the and fluid.

This current can be considerable (tens or more amps), despite the relatively large electric resistance of the liquid, since the magnitude of the rectified EMF rotor winding due to the large number of turns can also be obtained in large (hundreds or more volts); in addition, the maximum current passes through the liquid in the interpolar space of the magnetic system of the device contributes to the electrical insulation of all live parts in contact with the treated liquid inside the device, including the inner surface of the inlet and outlet fittings.

Since this current, due to the presence of the rectifier, constant, fluid will leak electrolysis process that in some cases, for example, when using the device for water treatment, mixing concrete in combination with electrode plates of iron and aluminum and their combinations and introduce chemical additives can give the additional effect of electromagnetic processing.

Thus, proceeding (located) in the interpolar space of the magnetic system of the device, fluid is simultaneously affected by intense magnetic field and a significant DC valise certainly will increase the efficiency of electromagnetic processing liquid in such a device.

Sources of information:

1. USSR author's certificate N 1188106, class C 02 F 1/48, 1985.

2. The patent of Russian Federation N 2052917, class C 02 F 1/48, 1995.

Device for electromagnetic processing liquid, comprising a housing which has a stator from a set of electrical steel sheets, stacked in its grooves coil, which together with a package of steel stator encapsulated and electrically isolated from the treated fluid, and the rotor also from a set of electrical steel sheets with grooves and teeth on a side surface covered with a layer of insulation, which is concentric with the clearance for the passage of the treated fluid is installed inside the stator and capacity and contains at the ends of the electrically isolated from electrical contact with the treated liquid plate, and also formed inside the housing capacity for liquids with inlet and outlet fittings, characterized in that the rotor is stationary and provided with a laid in its grooves multiturn winding, the ends of which with the current in it an EMF is induced by a rotating or pulsating magnetic field of the stator, is connected to the rectifier, which is equipped with a rotor consisting of semiconductor valves, the mouth of the Tay rotor, while the rotor winding along with steel rotor, a semiconductor rectifier valves and electric connection of the windings of the rotor rectifier sealed and electrically isolated from the treated fluid and the output of the rectifier, its "plus" and "minus" connected installed on insulators at both ends of the rotor, electrically isolated from electrical contact with the treated liquid electrode plates, and all other conductive parts inside the unit is covered by a layer of insulation.

 

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