Submerged motor rotor

FIELD: electricity.

SUBSTANCE: invention pertains to the field of electric engineering, in particular to eclectic motors with permanent magnets used, for example, for submerged electric drive without formation fluid lifting. The motor rotor comprises a key-slotted shaft, the core pack made of electric steel plates with alternating poles, and each of them is formed by two V-mounted prismatic permanent magnets with tangential magnetism faced to the pole by its one polarity. The magnets are placed in slots of the pack plates and do not touch each other. The number of magnets is twice bigger than the number of poles. At inner surface of poles of both polarities there are slots along the pole axis.

EFFECT: improvement of the motor output performance due to scattering of magnetic flow at maintained rotor strength.

5 cl, 5 dwg

 

The invention relates to the field of electrical engineering, in particular for electric motors with permanent magnets used, for example, in the submersible actuator for lifting reservoir fluid.

The design of the submersible motor is relatively small diameter and a large length, and the shaft is, as a rule, of conductive material. The cavity between the stator and rotor submersible motors filled with liquid, so it is desirable that the permanent magnets in such motors were mechanically protected.

Known rotors of the motors, in which permanent magnets magnetized in the radial direction and located in "Windows", vyshtampovannyj in sheets of electrical steel, of which holds the magnetic circuit of the rotor [Sagalowsky A. C. a New generation of brushless motors of "the Wrestler" is a new step in energy conservation//Engineering practice. 2010. No. 8. C. 28].

The drawback of such rotors is a relatively low value of induction in the working gap of the motor, which results in low values of the specific developing moment.

Known rotor magneto-electric machine, which contains a package of conductive plates of steel with holes, and permanent magnets prismatic shape with a tangential naman is the availability of N-S, installed in the holes in the plates at an angle to the radial axis so that the distance between the opposite poles of two adjacent magnets on the outer arc is less than the inner, and holes are made V-shaped, and installed the magnets forming the pole division, touching the same poles [Patent No. 2316103 of the Russian Federation, IPC H02K 1/27, H02K 21/14, 2005].

No jumper between the pole and the inner ring magnetic circuit reduces the mechanical strength of the rotor. During rotation of the rotor to the outer ring is applied centrifugal force of the weight of the pole and two magnets. This tends to increase the radial dimension of the outer ring of the magnetic circuit, resulting in increased flux already on the outer ring, not allowing to significantly increase the useful stream.

Known rotor submersible electric motor containing a shaft with keyway, the magnetic circuit package of rolled steel plates with poles of alternating polarity, each of which is formed by two facing toward the pole of one polarity V-shaped spaced permanent magnets prismatic shape with tangential magnetization, not touching each other and located in the slots of the plate pack having an inner and outer surface without gaps, and the number of magnets in the two times is more number of poles [Patent No. 2244370 of the Russian Federation, IPC NC 1/06, NC 21/12, 2003].

By the combination of features of the object closest to the claimed. Due to the fact that in the magnetic system of the rotor formed of magnetic fluxes, it has the potential of getting in the gap of the electric motor of values induction greater than the value of the induction of a short circuit of the permanent magnet. This provides increased Electromechanical and energy performance of the motor.

The disadvantage of the rotor is increased scattering of the magnetic flux in the magnetic system. Indeed, the scattering plot the pole-shaft" is limited only by the saturation of the extremely small span lengths between the converging faces of the permanent magnets adjacent to the shaft, and the mechanical communication with the shaft carried by the ledge on the inner surface of the magnetic circuit. To preserve the mechanical strength of the sheet width saturating areas is 0.5-1.5 mm, and passing through them, and the shaft flux is a significant part of the full flow of the pole.

The present invention is aimed at improving Electromechanical and power characteristics of the motor by reducing magnetic flux leakage, while maintaining the mechanical strength of the rotor.

This technical result dost is presumed to those in the rotor submersible electric motor containing a shaft with keyway, the magnetic circuit package of rolled steel plates with poles of alternating polarity, each of which is formed by two facing toward the pole of one polarity V-shaped spaced permanent magnets prismatic shape with tangential magnetization, not touching each other and located in the slots of the plate pack having an inner and outer surface without gaps, and the number of magnets is twice the number of poles according izobreteniya the inner surface of the poles of both polarities along the axis of the poles made grooves.

To simplify Assembly, the grooves along the axis of the poles of one polarity, it is advisable to fulfill with a width less the width of the groove located on the axis of the poles of the other polarity.

Preferably, the radial dimension of the groove in the center was more than the edges, this will keep the same degree of saturation along the entire length of saturable sites (jumpers).

Scattering is minimal, if for a mechanical coupling of the magnetic circuit package with the shaft are pins of a nonmagnetic material.

In addition, on the outer surface of the plates megapolises axis of each pair of adjacent poles can be made of the recess and the plate, at least part on the Yusov are welded along the entire length of the magnetic circuit with the formation of the weld on the bottom of the fill.

The invention is illustrated by drawings.

In Fig. 1 shows a cross-section of the rotor with grooves made on the inner surface of the poles of both polarities along the axis of the pole; Fig. 2 is a cross section of the rotor with grooves of different width, Fig. 3 - fragment a of Fig. 2 in an enlarged scale; Fig. 4 is a cross section of the rotor without grooves in two adjacent poles of one polarity, and Fig. 5 is a cross section of the rotor with grooves on the outer surface.

The rotor submersible electric motor includes a shaft 1 on which is located the magnetic core 2, composed of rolled steel plates (Fig. 1, 2, 4, 5). The inner and outer surfaces of the plates are made without breaks. In the Windows of the magnetic circuit 2 is placed permanent magnets 3, magnetized in the tangential direction so as to create alternating North and South poles of the rotor. On the inner surface of the magnetic core 2 along the axis of the poles made the grooves 4, in one or more of which has pins 5 which serve for the transmission of the useful torque on the shaft 1. On the outer surface of the rotor megapolises axis of each pair of adjacent poles can be made of the recess 6 (Fig. 5), which can be used to join the plates together by welding so that the weld seam passing through the bottom of the grooves 6, did not go beyond forming the environment and the efficiency of the poles. The presence of these notches further reduces leakage flux.

Open for magnets 3 and grooves 4 formed in the magnetic core 2 internal saturable sections 7 (Fig. 3).

The rotor of the electric motor is an inductor, i.e., the source of magnetic flux. Created by the permanent magnets 3 stream pole (Fig. 1, 5) contains a useful thread fpalso connected across the stator, and the main flows of dispersion: flow fs1connected via an internal saturable jumpers 7 and the shaft 1, the flow fs2connected via jumper wires 8, adjacent to the external generatrix of the rotor (Fig. 3).

The smaller the value flows scattering, the more perfect the motor. The amount of threads scattering is determined by the degree of saturation of the conductive jumpers and their length.

The greater the length of saturable sites 7, the higher their magnetic resistance flows scattering, which closed chain: a pole of one polarity - saturating the plot pole of one polarity - Val - saturating the plot pole of the other polarity pole of the other polarity. In known magnetic system the length of the saturable site for flux fs1extremely small, which leads to increased scattering of the magnetic flux of permanent magnets. In the rotor of the proposed design the length of the saturable teaching tcov at least an order of magnitude greater.

The optimal dimensioning of the mechanical strength of the dissipation factor will be the case when the thickness of the saturable sections 7 will be the same throughout their length. For this purpose, the grooves 4 it is advisable to perform with the radial center dimension greater than at the edges, such as "roof-like" (Fig. 1-5).

In the case of a large number of poles may be insufficient strength of the area between the slots 4 through which the transmitted torque of the engine shaft 1. In this case, the grooves 4 are not doing opposite poles adjacent to the pole with the actual keyway slot in which you installed the plug 5, the connecting shaft 1 with the magnetic circuit 2 (Fig. 4). Manufacturer of pins 5 of non-magnetic material reduces the scattering of the magnetic flux.

When performing slots 4 across all of the poles there is a risk that during Assembly of the motor of the packages can be installed so that one axis will be poles of different polarity. To exclude this possibility, the grooves located opposite the opposite poles, and can be performed with different width (Fig. 2-3).

Thus, the inventive design of the rotor by increasing several times the length of the saturable sections of the magnetic circuit formed for Windows magnets and the upper sides of the slots, allows to reduce the magnetic flux is a, and as a consequence, to improve Electromechanical and power characteristics of the motor.

1. The rotor submersible electric motor containing a shaft with keyway, the magnetic circuit package of rolled steel plates with poles of alternating polarity, each of which is formed by two facing toward the pole of one polarity V-shaped spaced permanent magnets prismatic shape with tangential magnetization, not touching each other and located in the slots of the plate pack having an inner and outer surface without gaps, and the number of magnets in twice the number of poles, characterized in that on the inner surface of the poles of both polarities along the axis of the poles made grooves.

2. The rotor under item 1, characterized in that the grooves of the poles along the axis of one polarity is made wider than the grooves of the poles along the axis of the other polarity.

3. The rotor under item 1, characterized in that the radial dimension of the slots of the poles in the centre than at their edges.

4. The rotor under item 1, characterized in that the mechanical connection of the poles with the shaft used dowels, made of a nonmagnetic material.

5. The rotor under item 1, characterized in that on the outer surface of the plates megapolises axis of each pair of adjacent poles made excavation, and plate, at least part of the poles soy is inany welding along the entire length of the magnetic circuit with the formation of the weld on the bottom of the grooves.



 

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FIELD: electricity.

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FIELD: electricity.

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8 cl, 4 dwg

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21 cl, 16 dwg

FIELD: electricity.

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EFFECT: provision of rationality of rotor manufacturing process with permanent magnets with simultaneous provision of high reliability of permanent magnets fixation with closure on material of an electric machine rotor yoke.

3 cl, 7 dwg

FIELD: electricity.

SUBSTANCE: in the process of making an external rotor (17) of an engine, permanent magnets (7) are placed along the peripheral surface (4) of a cylindrical pattern (1); a cylindrical ring (8) is placed on the outer surface of the permanent magnets with pretensioning, wherein the opening (14) of the lower element (13) of the rotor is placed concentrically relative to the peripheral surface (3) of the pattern (1). The invention also relates to the design of a rotor made according to said method. The present method enables to assemble a rotor not in the direction from its outer side to its inner side, but from its inner side to its outer side.

EFFECT: providing high accuracy of positioning inner sections of permanent magnets relative the opening in the lower, ie inner, element of the rotor, or to the position of the engine shaft so as to obtain an air gap with very small clearance, using a pattern which can be made while observing high accuracy of its geometrical dimensions, considerably low cost of making the disclosed rotor.

11 cl, 8 dwg

Synchronous machine // 2486653

FIELD: electrical engineering.

SUBSTANCE: rotor consists of the main casing (20) and a range of support casings (30a, 30b), which are fixed on the main casing (20) and supporting permanent magnets (40). The two first support casings (30a) located at distance from each other form entrance area for the second support casing (30b) providing possibility of rigid mounting of the first support casing (30a) to the second support casing (30b).

EFFECT: simplified assembly.

36 cl, 6 dwg

FIELD: electrical engineering.

SUBSTANCE: method includes the following successive steps: a) a set (36) is formed by attaching of at least two unit elements to each other with insulation between them, at that unit elements are magnetised; b) mechanical treatment (68) of main surface for the set of unit elements in order to form cylindrical surface with radius equal essentially to the core radius. The magnetisable set (70) is magnetised; c) magnetised sets are set (72) at the core. At that the above magnetised set forms at least a part of the magnetic pole. Rotor contains the core; at least one magnetic pole is mounted at the core by means of the above method.

EFFECT: ability to resist mechanical impact of magnetic pole during rotor spinning.

10 cl, 8 dwg

FIELD: electrical engineering.

SUBSTANCE: invention may be used, e.g., during installation of a bushing installation around the shaft of an electric machine rotor with permanent magnets or in other devices where the bushing is to be rigidly fixed on the shaft part, simultaneously subject to effects of turning forces, in particular, at a high rotation rate. The proposed method of the bushing installation around the shaft (2) part by way of press fit includes the following steps: installation of a guide element (7, 23) with an external surface (8) that is at least partly conical; installation of the guide element (7, 23) as an extension of the above shaft (1) part (2); the bushing (5) relocation along the guide element (7, 23) onto the shaft (1) part (2); the press (13) relocating in an axial direction towards the conic part (9) during the first stage of the bushing (5) relocation along the guide element (7); usage of a press element (17) with an internal diameter (D10) equal to or in excess of the external diameter (D1) of the shaft (1) part (2) during another stage of the bushing (5) relocation along the guide element (7).

EFFECT: ensuring the possibility of a lengthy bushing press fit installation onto the shaft part at room temperature (the bushing made eg of a synthetic material) to form firm connection between the shaft and the bushing without the risk of the bushing bend or damage with simultaneous saving of time spent on such assembly.

21 cl, 17 dwg

FIELD: electricity.

SUBSTANCE: there proposed is rotor (16) manufacturing system and method, as well as magnetisation method of cylindrical element of electric machine (10), in compliance with which multiple segments (28) of constant magnet are fixed around rotor spindle (24). Desired orientation directions (29) of constant magnet segments (28) are determined. Then, mounted constant magnet segments (28) are placed into magnetisation equipment (44) so that desired orientation directions (29) of constant magnet segments (28) are combined with the appropriate flow directions (74) of magnetisation equipment (44). At that, desired orientation directions of constant magnet segments have such configuration that directions of the next orientation are changed from the direction which is essentially normal to the direction of rotor rotation about D-axis of rotor pole, to the direction which is essentially tangent to rotor rotation direction about Q-axis of rotor pole; desired orientation directions of constant magnet segments are determined by means of magnetic analysis by using finite element method according to the main characteristic of which the desired orientation directions of constant magnet segments are such that almost coincide as to the direction with magnetic flow formed with the magnetisation equipment.

EFFECT: simplifying the design, improving the efficiency and shortening the magnetisation process of constant magnet segments in rotors of electric machines.

13 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and referred to details of rotor manufacture on permanent magnets for electrical motor where permanent motors (4; 36) in inner side of rotor are arranged in parallel to rotor rotation axis (X) and in area of radial external longitudinal edges (8; 16) of permanent magnets (4; 36). Open outwards grooves are available on the external perimetre of rotor. They are tilted or bent to longitudinal edges (6; 18) of adjacent permanent magnets (4; 36) in the direction of perimetre or at least cross it once. The grooves (6; 18) on external side of rotor in the direction of perimetre are less wide than those close the centre of groove section (6; 18). The form of the groove cross section (6; 18) is constant along rotor length. Besides the invention is referred to such rotor manufacture method.

EFFECT: even change of rotor torque moment with maximum efficiency factor and improved effectiveness and simplified motor manufacture and assembly.

19 cl, 13 dwg

FIELD: electricity.

SUBSTANCE: plates are cut of sheets made of non-magnetic material of austenite-martensite grade, which is able to change in process of cold deformation from non-magnet phase to magnet phase, and when further heated - back to non-magnet phase. Such material may be alloy on the basis of austenite-martensite corrosion-resistant steel. At first stock non-magnet sheets are exposed to at least 65% cold pressing, shaping material change over to magnetic phase with magnetic permeability µ>100 Gs/E. Afterwards, with the help of heating by laser radiation up to 1000 - 1200°C, reverse conversion of material phase is carried out in local sections, corresponding to location of non-magnet zones of rotor plates with magnetic permeability µ=1 Gs/E. Previously prior to heating, absorbing coating is applied onto sections of surfaces that correspond to arrangement of non-magnet zones, and the coating increases thermal effect at least 2.5 times. For reliable preservation of material magnet phase resistance it is optimal that its temperature is at least 500°C below temperature of converted local sections heating. After heating and further natural cooling on air, coating is removed, rotor plates are cut as per program and are fixed to each other in axial direction into packet, which is installed on rotor shaft. Heating with laser radiation is carried out by means of sheet surface scanning by focused or non-focused laser beam. Gradient material has high mechanical characteristics (yield point on both phases is at least 80 kG/mm2) while magnetic permeability of magnetic material is at least 100 Gs/E, and non-magnetic - 1 Gs/E.

EFFECT: increased permissible peripheral speed of rotor rotation and increased utilisation ratio of electric machine.

5 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention refers to the sphere of electrical engineering and electrical machinery industry and is of relevance for design and development of high-speed synchronous electrical machinery equipped with permanent magnets. Conceptually the invention consists in the process of the electrical machine rotor assembly envisaging an alternating pole magnetic system being mounted on the rotor shaft composed of tangentially magnetised permanent magnets (1) with the poles arranged between them. Under the method proposed the magnetic system consists of regularly alternating magnetic (2) and non-magnetic (3) O-plates with slots for insertion of permanent magnets (1). First the nonmagnetic plates (3) are fixed on the shaft being slipped on the axial pins (4) regularly alternating with the magnetic plates (3) whose outer diameter exceeds that of the magnetic plates. After that all the plates are tightly drawn together in the axial directions with the help of the remaining pins and the projecting edges of the magnetic pales (2) are turn-treated till the latter's outer diameter comes to equal that of the nonmagnetic plates (3); the treatment over, the permanent magnets are mounted.

EFFECT: facilitation of assembly and reduction of labour intensity.

3 cl, 2 dwg

Stator // 2537791

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and wind power, namely to wind power generators with vertical axis of rotation. Stator contains excitation sources, magnetic cores, work coil and bases with fasteners. The magnetic cores are made in form of top and bottom groups. Each group includes angle-bar which horizontal flange looks on the end gap of the rotor element, and vertical flange looks on first end of coil with permanent magnets. The second end of the coil with permanent magnets is connected with common vertical magnetic core.

EFFECT: efficiency improvement due to that not only radial by end gaps are also used.

1 dwg

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