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INVENTION
Russian Federation Patent RU2265550
ELECTROMAGNETIC propulsor IN LIQUID MEDIA
Name of applicant: Urazov Farid Fayzovich (RU); Ivashov Vladimir Trifonovich (RU); Tarasenko Andrey (RU); Logoyda Igor Rostislavovich (RU)
Name of the inventor: Urazov Farid Fayzovich (RU); Ivashov Vladimir Trifonovich (RU); Tarasenko Andrey (RU); Logoyda Igor Rostislavovich (RU)
The name of the patentee: Urazov Farid Fayzovich (RU); Ivashov Vladimir Trifonovich (RU); Tarasenko Andrey (RU); Logoyda Igor Rostislavovich (RU)
Address for correspondence: 353900, Krasnodar, Novorossiysk, st. Rubin, 83, F.F.Urazovu
Starting date of the patent: 2004.04.19
The electromagnetic propeller for spatial displacement remotely operated device in liquid media comprises a laminated ferromagnetic cylindrical stator core with three-phase encapsulated coil rigidly mounted in the vehicle, the rotating part of a hollow laminated ferromagnetic core with a short-circuited copper windings and rotor blades arranged in the core of the rotating part. Each of the blades of the rotor is a three-layer structure, two outer portions which are made of brass, bronze or plastic, and the inner is a permanent magnet from a sintered powder material of high coercivity, and the number of vanes is even equal to the number of stator poles. Such an arrangement mover provides efficient conversion of electricity consumption by eliminating the consumption of reactive power from the power supply network.
DESCRIPTION OF THE INVENTION
The invention relates to the basic elements of the ship equipment, namely for ship propellers, and is intended for spatial movement of remote controlled devices for different purposes in a liquid medium, for example, in sea water, petroleum and others.
A device designed for movement on the surface of or inside a liquid medium consisting of a drive motor and propeller, carrying forward movement through the conversion of energy in the engine and transmission of its blade propeller. The motor and screw spatially separated and the latter is in a liquid medium. A disadvantage of such devices is the presence of a shaft connecting the screw and a drive motor that not only increases the weight of the device and the number of friction parts, but also reduces the efficiency (COP) (Reference ship theory Edited Voytkunskogo YI Vol.1. - L., Shipbuilding, 1985, s.432)
The closest device for the same purpose to the claimed invention, a set of attributes is a device (QUEST Electric Ring Thrusters ALSTOM Shilling Robotics 201 Cousteau Place, Davis, California 95616-5412 USA tel:.. +1(530)753-6718 Fax +1 ( 530 ) 753-8092 E-mail: Sales.schilling @ , powerconv.alstom.com www.schilling.com) in which a motor and a screw spatially aligned, i.e. the screw structurally arranged inside the induction motor so that its rotor core is disposed in the radial direction on the peripheral circumference of the propeller blades.
The drawback of the prototype on the one hand is the consumption of the stator winding from the source of reactive power supply, which results in additional electric losses and reduce efficiency, and on the other hand the use of an odd number of rotor blades leads to unbalance the action of electromagnetic forces and the appearance of additional effort on the friction surfaces of the bearing assemblies.
The task to be solved by the claimed invention is to increase the effectiveness and efficiency of power conversion in the implementation of translational motion of the apparatus.
The technical result - the efficient conversion of electricity consumed by eliminating the consumption of reactive power from the power supply network is obtained by using the magnetic flux of the permanent magnets embedded in the blades of the propeller performed three layers, and even in number.
Said technical result in the implementation of the invention is achieved in that the electromagnetic mover for spatial displacement remotely operated device in the form of a device comprising a laminated ferromagnetic cylindrical stator core with three-phase encapsulated coil rigidly mounted in the vehicle, and a rotating part in the form of a hollow laminated ferromagnetic core with a short copper coil inside which are placed propeller blades according to the invention each of the blades of the rotor is a three-layer structure, two outer portions which are made of brass, bronze or plastic, and the inner is a permanent magnet from a sintered powder material of high coercive force and the number of vanes is even, equal number of stator poles.
The distinctive features of the claimed invention from the prior art is that the internal cavity of each of the blades of the screw filled according to Figure 1, powder material from surmakobalta forming permanent magnets and each of the blades is made sandwich and an even number of blades.
The first sign of permanent magnets leads to the expulsion of consumption from the power supply of the reactive component of the stator current, and thus to improve efficiency.
The second feature of the manufacture of three-layer rotor blades feature allows to choose the material of the outer layers of the respective viscosity of the medium, which is designed to move remote-controlled unit in order to increase the efficiency of the propeller.
The third feature of using an even number of blades instead odd results in greater balance of forces, including centrifugal and hence to a smaller load on the bearing assemblies.
BRIEF DESCRIPTION graphic materials, where Figure 1 shows a cross section through a solenoid mover, and Figure 2 - a cross section of its blades. The design of the propeller corresponds to the principle of operation of synchronous machine with permanent-magnet and the presence of the damper (soothing, short-circuited) winding. The design has a fixed outer part (the stator), rigidly connected to the housing remotely operated machine, and a rotating inner part (rotor) through the hollow space which is between the rotor blades pass the liquid, and the reaction from them leads to the progressive movement of the machine.
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Stator in structure similar to the stator three-phase synchronous electric motor, which housing (bed) serves as a guide nozzle apparatus, not shown in Figure 1. The core 1 of the stator laminated from a sheet of cold rolled electrical steel having stamped tine and grooves. The slots stacked three-phase windings 2 of the stator, the conductors which may be encapsulated by a special plastic, resistant to fluids. Inside the cylindrical stator core in a radial direction away from him working "air" gap is the rotor.
Rotor outside is laminated from sheets of cold rolled electrical steel cylindrical core 3 having the part of the outer surface of stamped tine and grooves. The grooves stacked rods electrical copper which on both end faces of the core are electrically interconnected by copper rings 5. The bars and rings form a short-circuited (launcher) winding 4 of the rotor of the synchronous machine.
Inside the hollow core of the rotor is the propeller blade 8 is radially fixed at one end of the hub 9 of ferromagnetic steel, and the other end in the stacked portion 3 of the rotor core. Each of the blades, the number of pairs which is equal to the number of pairs of stator poles, in the tangential (lateral) section, a three-layer structure 2. The two outer layers are made, or from non-magnetic conductive material (copper, brass, bronze), or of plastic, and the inner layer is made of extruded powder material constituting the permanent magnet 7. In order to most of magnetic flux generated by the permanent magnets of the blades closed through the stator core on both sides of sealing blades in a rotor core provided or nonmagnetic rods 6 of copper, welded at the ends with short locking ring, or ceramic insert.
Work "air" gap between the stator core and the rotor is formed by using two symmetrical sleeves of ceramic material which are not shown in the drawing and performing the role of the outer and inner rings of sliding bearings.
The proposed electromagnetic propulsion, cross section of which is illustrated in Figure 1, in the liquid medium operates as follows. When three-phase voltage of industrial frequency in the stator winding 2 from occurring current comes running along the circumference of the propulsion magnetic field. The magnetic flux of this field, closed in the cores of the stator 1 and rotor 3 and crossing bars of the latter, suggesting they electromotive force (EMF). Under the influence of the latter in a short-circuited winding of the rotor 4, currents and formed and traveling magnetic field, the magnetic flux of which is closed in the same way as the flow of the current of the stator winding. Formed resulting magnetic flux, whose interaction with the currents of the rotor coil generates electromagnetic forces. The set of actions of forces leads to the formation of the electromagnetic torque asynchronous nature. Under the influence of the last rotor with propeller blades come into rotation, and the liquid reaction medium on the blades causes translational movement of the entire device with remote controlled device. Thus, there is an initial launch propulsion, and upon reaching the rotor rotational speed close to the field rotation speed comes into effect additional electromagnetic torque by interaction of the permanent magnet with the stator field. This time is called simultaneous and equal rotation of the rotor speeds (permanent magnets) and the stator field will be a synchronous motor mode.
By design, the implementation of the starting coil of copper and the rotor core slots deep with a ratio of height to width of about 8-10 enhances the skin effect action at start and increases the starting torque of the motor.
In addition, the use of copper for the short (start) of the rotor winding leads to a decrease in its resistance when compared with aluminum alloy, and hence tends to reduce the critical slip and to facilitate acquisition in the presence of the load on the rotation of the rotor in the fluid in translation apparatus.
Synchronous motor, unlike asynchronous, at a certain flow field (permanent magnet) can be operated without consumption of power supply jet (magnetizing) current (power factor of 1).
This eliminates, in comparison with the prototype, the additional power loss of the stator winding and increases the efficiency of the device. In addition, unlike the prior art, the use of an even number of rotor blades resulting in greater dynamic balancing device, and less stress on the friction surface of the bearing assemblies. Implementation of the propeller blades, unlike the prototype three-layer allows to select the material of the outer layers of the respective viscosity of the medium, which is designed to move remote-controlled device. This reduces the frictional resistance of the screw, increasing its efficiency.
CLAIM
The electromagnetic propeller for spatial displacement remotely operated device in the form of a device comprising a laminated ferromagnetic cylindrical stator core with three-phase encapsulated coil rigidly mounted in the vehicle, and a rotating part in the form of a hollow laminated ferromagnetic core with a short-circuited copper windings, inside which are placed propeller blades, wherein that each of the rotor blades is a three-layer structure, two outer portions which are made of brass, bronze or plastic, and the inner is a permanent magnet from a sintered powder material of high coercivity, and the number of vanes is even equal to the number of stator poles.
print version
Publication date 30.12.2006gg
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