RU173606U1 - Submersible Asynchronous Disc Motor - Google Patents

Abstract

The utility model relates to the field of electrical engineering and can be used in the design and manufacture of electric motors used as drives for high-power mechanisms, in particular: submersible pumps designed to lift formation fluids from oil to the surface: oil, brines, water. The technical result of the utility model is creation of a submersible asynchronous disk electric motor with high torque and with enhanced control capabilities electric motor stick. In a submersible asynchronous disk electric motor containing a housing, a stator attached to the housing, and a rotor attached to the motor shaft, according to a utility model, the stator and rotor are made in the form of alternating blocks of stators and rotors arranged in series along the motor shaft, the stators are made disk and installed with a gap relative to the motor shaft, between the disks of the stators around the circumference are the cores on which the phase windings of the stators are located, the rotors are made of disk and ovleny with gaps relative to the motor housing, between the rotor discs in circles mounted cores which are placed on the excitation coil, between the rotor and stator disks are provided clearances in the range of 0.2-0.5 mm.

Description

The utility model relates to the field of electrical engineering and can be used in the design and manufacture of electric motors used as drives of mechanisms of increased power, in particular submersible pumps, designed to lift formation fluids from wells to the surface: oil, brines, water.

Asynchronous electric motors containing a stator and a rotor are widely known, in which the rotor is made with permanent magnets attached to it. Such technical solutions are known, for example, from patents RU 2287721, RU 2571139.

Known electric motors have the following disadvantages:

- significant electromagnetic losses in the permanent magnets of the rotor, accompanied by significant heat generation;

- reduced torque on the shaft of the rotor of the electric motor.

Known submersible motor according to patent RU 40824, selected as a prototype. The prototype consists of a squirrel-cage multi-support rotor with intermediate bearings, a stator whose magnetic circuit is composed of sheets of electrical steel, a core having twelve closed trapezoidal grooves in which a three-phase single-layer winding is laid.

The prototype has the following disadvantages:

- insufficiently high torque;

- the difficulty of controlling the speed of rotation of the rotor with the shaft;

- high starting current;

- low slip coefficient.

The objective and technical result of the utility model is the creation of a submersible asynchronous disk motor with high torque and with increased control capabilities of the motor performance.

The technical result is achieved by the fact that in a submersible asynchronous disk motor containing a housing, a stator attached to the housing, and a rotor attached to the motor shaft, according to the utility model, the stator and rotor are made in the form of alternating blocks of stators and rotors arranged in series along the motor shaft , the stators are made disk and installed with a gap relative to the motor shaft, between the disks of the stators around the circles are the cores on which the phase windings of the stators are placed, the rotors are made They are disk and installed with gaps relative to the motor casing, cores are installed between the rotor disks on the circumferences, on which the field windings are placed, and gaps in the range of 0.2-0.5 mm are provided between the rotor and stator disks.

The rotor cores, on which the field windings are located, are arranged uniformly in the radial rows.

Between the rotor disks in the radial direction are at least two cores with field windings.

Electric motor disks are made of aluminum non-magnetic alloys.

The motor cores are made of electromagnetic steel.

In the proposed design of the electric motor, an increase in torque is achieved through the use of rows of electromagnets in the design of the rotors, each of which creates its own discrete electromagnetic field. As a result of the addition of discrete electromagnetic fields, the resulting electromagnetic field of the rotors, interacting with the magnetic fields of the stators, provides an increase in torque on the motor shaft.

The clearance between the stator and rotor disks in the range of 0.2-0.5 mm allows to reduce the value of the starting current.

Improving the accuracy of regulation, the rotor speed of the rotors with the shaft is ensured by the presence of a significant number of rotor excitation windings, since in the rotor windings connected in parallel to each other, any changes in the control current characteristics are distributed to all the rotor excitation windings, stretching the change in the rotational speed of the rotors with the shaft over time.

Due to the many excitation windings of the rotors, which results in an increase in the magnetic field strength of the rotors, the slip coefficient of the rotors relative to the stators increases.

The essence of the utility model is illustrated by drawings.

The figure 1 shows the block system of the proposed motor.

The figure 2 shows a side view of the elements: the stator-rotor-stator with a quarter longitudinal section.

Figure 3 shows a side view of AA on the rotor.

The figure 4 shows a side view of the stator.

Submersible asynchronous disk motor contains a housing 1, rotors 2, rigidly attached to the shaft 4, and stators 3, rigidly attached to the housing 1. Disk rotors 2 are each made of two disks 5, parallel to each other, mounted on the shaft 4, made of non-magnetic aluminum alloys. Between the disks 5 of the rotors 2 are fixed radial rows of electromagnets 6 with cores 7 made of electrical steel. The disks 5 of the rotors 2 are fastened together by ties 8 and are attached to the half rings 9. The half rings 9 are attached to the motor shaft 4 by means of a threaded connection 10. Disk rotors 2 are located along the length of the shaft between the blocks of windings of the stators 3. The disks 5 of the rotors 2 are connected by couplers 11. The stators 3 each contains two disks 12 made of non-magnetic aluminum alloys and attached to the housing 1. Electromagnets 13 are fixed between the disks 12 of the stators 3 The number of electromagnets 13 is even, equal to the number of radial rows of electromagnets 6 of the rotors 2. The disks 12 of the stators 3 are pulled together by means of tie rods 14. The number 15 indicates the ties of the stators 3, the positions 16.17 indicate the current leads.

A feature of the proposed design of an asynchronous disk electric motor is the following. When an electric current is applied to the field windings of the stators, eddy primary currents are generated in the windings of the rotor electromagnets, which create electromagnetic fields in the cores.

These magnetic fields are summed up and, coupled with the magnetic fields of the stators, provide the claimed electric motor with an increase in electromagnetic characteristics.

Another feature of the proposed design is that, depending on the type of current supplied to the stator windings, as well as the presence of direct current or its absence in the rotor windings, the motor becomes asynchronous or synchronous, with an alternating or direct current supply.

Claims (5)

1. Submersible asynchronous disk electric motor containing a housing, a stator attached to the housing, and a rotor attached to the motor shaft, characterized in that the stator and rotor are made in the form of alternating blocks of stators and rotors arranged in series along the motor shaft, the stators are made disk and installed with a gap relative to the motor shaft, between the disks of the stators around the circumference are the cores on which the phase windings of the stators are located, the rotors are made of disk and installed with gaps In the engine casing, cores are installed between the rotor disks along the circumferences, on which the field windings are placed, and gaps in the range of 0.2-0.5 mm are provided between the rotor disks and the stators. 2. Submersible asynchronous disk electric motor according to claim 1, characterized in that the rotor cores on which the field windings are located are arranged uniformly in radial rows. 3. Submersible asynchronous disk motor according to claim 1, characterized in that at least two cores with field windings are located between the rotor disks in the radial direction. 4. Submersible asynchronous disk electric motor according to claim 1, characterized in that the electric motor disks are made of aluminum non-magnetic alloys. 5. Submersible asynchronous disk electric motor according to claim 1, characterized in that the motor cores are made of electromagnetic steel.

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