Zero-eddy-current-loss magnetic coupling for low-corrosion conducting medium working condition

Abstract

The invention discloses a zero-eddy-current-loss magnetic coupling for a low-corrosion conducting medium working condition, and relates to the technical field of couplings, in particular to the zero-eddy-current-loss magnetic coupling for the low-corrosion conducting medium working condition. The device comprises a driven shaft, an inner rotor, an isolation sleeve, a main transmission shaft, an outer rotor and a device shell, the driven shaft enters the equipment shell from a shaft hole in the bottom of the equipment shell, and the inner rotor is assembled at the shaft end of the driven shaft. The main transmission shaft enters the equipment shell from a shaft hole in the top of the equipment shell, and the outer rotor is assembled at the shaft end; the inner rotor and the outer rotor are isolated by an isolation sleeve, and the isolation sleeve is fixedly connected with the equipment shell through a bolt. And the isolation sleeve can isolate the driving shaft area from the driven shaft area, so that a medium is prevented from entering the driving shaft area to cause corrosion of the driving motor. According to the technical scheme, the problems that in the prior art, due to the heat accumulation phenomenon, efficiency is reduced, energy consumption is increased, and meanwhile, a medium leaks into the motor to cause corrosion are solved.

Description

Technical Field

[0001] The invention discloses a zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions, relates to the technical field of couplings, and in particular to a zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions. Background Art

[0002] At present, during the operation of the magnetic coupling, the eddy current generated by the metal isolation sleeve constantly cutting the magnetic lines of force causes the coupling to accumulate heat, resulting in reduced efficiency and increased energy consumption; at the same time, the existing coupling also has problems such as medium leakage into the motor, causing corrosion to it. The use of a non-metallic isolation sleeve, which is assembled with the equipment housing and auxiliary sealed by a sealing ring, isolates the inner magnetic rotor from the outer magnetic rotor. While ensuring the transmission of torque, it can prevent the medium from leaking into the motor and causing corrosion to it. The use of a non-metallic isolation sleeve also avoids the phenomenon of heat accumulation in the coupling caused by eddy currents generated by the metal isolation sleeve constantly cutting the magnetic lines of force during operation, effectively improving the efficiency of the magnetic coupling and reducing energy consumption.

[0003] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions, so as to overcome the problems existing in the prior art. Summary of the invention

[0004] According to the technical problems raised by the above-mentioned prior art, such as the decrease in efficiency and increase in energy consumption due to the heat accumulation phenomenon, a zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions is provided. The present invention mainly adopts a non-metallic isolation sleeve to avoid the phenomenon of heat accumulation in the coupling caused by the eddy current generated during operation, which can effectively improve the efficiency of the magnetic coupling and reduce energy consumption; at the same time, because of the use of a non-metallic high-strength isolation sleeve, the transmission of torque can be achieved, and the motor can also be isolated from the conductive medium to prevent the medium from leaking into the motor and causing corrosion to it.

[0005] The technical means adopted by the present invention are as follows:

[0006] A zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions comprises: a driven shaft, an inner rotor, a spacer sleeve, a main transmission shaft, an outer rotor and an equipment housing;

[0007] Furthermore, the driven shaft enters the interior of the device housing through the shaft hole at the bottom of the device housing, and the shaft end thereof is equipped with an inner rotor;

[0008] Furthermore, the main transmission shaft enters the interior of the equipment housing through the shaft hole at the top of the equipment housing, and the shaft end thereof is equipped with an outer rotor;

[0009] Furthermore, the magnetic material in the inner rotor and the outer rotor is made of samarium cobalt;

[0010] Furthermore, the inner rotor and the outer rotor are isolated by an isolation sleeve, and the isolation sleeve is fixedly connected to the device housing by bolts.

[0011] Further, the inner rotor comprises: an inner rotor upper end cover, an inner rotor shaft connecting transition piece, a transmission key, an inner rotor permanent magnet fixing seat, an inner rotor squirrel cage, an inner rotor permanent magnet protection cover, an inner rotor permanent magnet, and an inner rotor lower end cover;

[0012] Furthermore, the inner rotor shaft connecting transition piece is fixedly mounted on the top shaft end of the driven shaft, and the upper and lower ends of the outer side thereof are respectively equipped with an inner rotor upper end cover and an inner rotor lower end cover;

[0013] Furthermore, the inner rotor permanent magnet fixing seat is connected to the inner rotor shaft connecting transition piece in the circumferential direction through a transmission key, and its axial positioning is achieved by the cooperation of the inner rotor upper end cover and the inner rotor lower end cover;

[0014] Furthermore, the inner rotor cage is connected to the inner rotor permanent magnet fixing seat through a keyway to achieve circumferential positioning, and the axial positioning is achieved by the cooperation of the inner rotor upper end cover and the inner rotor lower end cover;

[0015] Furthermore, the magnetic material of the inner rotor permanent magnet is made of samarium cobalt, and is installed in the slot of the inner rotor squirrel cage to achieve circumferential positioning. Each inner rotor permanent magnet is fixed to the inner rotor permanent magnet fixing seat by two screws in the radial direction;

[0016] Furthermore, the inner rotor permanent magnet protection cover is welded to the inner rotor upper end cover and the inner rotor lower end cover to achieve wrapping and protection of the inner rotor permanent magnet.

[0017] Further, the outer rotor comprises: an axially fixed end cover, an outer rotor housing, an outer rotor permanent magnet, an outer rotor cage, an outer rotor permanent magnet protection cover, an axial limit clamping ring and an outer rotor shaft connection transition piece;

[0018] Further, the outer rotor shaft connection transition piece is fixedly mounted on the lower shaft end of the main transmission shaft;

[0019] Further, the top end of the outer rotor housing is mounted on the flange surface at the bottom of the outer rotor shaft connection transition piece by screws;

[0020] Further, the outer rotor cage is mounted inside the outer rotor housing through a keyway;

[0021] Furthermore, the magnetic material of the outer rotor permanent magnet is made of samarium cobalt and is installed in the installation slot provided by the outer rotor cage to achieve circumferential positioning of the outer rotor permanent magnet;

[0022] Furthermore, the upper and lower ends of the outer rotor permanent magnet are respectively provided with an axial limit clamp ring and an axial fixed end cover for providing circumferential positioning for the outer rotor permanent magnet and the outer rotor cage, and restricting the outer rotor permanent magnet and the outer rotor cage inside the outer rotor housing;

[0023] Furthermore, the upper and lower ends of the outer rotor permanent magnet protection cover are respectively welded to the axial limit clamping ring and the axial fixed end cover to provide protection for the outer rotor permanent magnet.

[0024] Further, the isolation sleeve comprises: a non-metal isolation sleeve and an isolation sleeve fixed end cover;

[0025] Furthermore, the non-metallic isolation sleeve and the isolation sleeve fixed end cover are fixed to the device housing by screws;

[0026] Furthermore, the isolation sleeve fixes the end cover to achieve the positioning of the non-metallic isolation sleeve;

[0027] Furthermore, the non-metallic isolation sleeve can achieve zero eddy current loss;

[0028] Furthermore, the non-metallic isolation sleeve is a cylindrical structure with a closed top, in which the inner rotor is sleeved to separate it from the outer rotor;

[0029] Furthermore, the bottom edge of the non-metallic isolation sleeve is turned outward for fixed connection with the device housing.

[0030] Furthermore, a sealing ring is provided between the non-metallic isolation sleeve and the device housing, and the sealing ring is deformed by extrusion under the pressure of the device plane and the sealing ring groove to ensure that the isolation sleeve has good sealing.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. The zero eddy current loss magnetic coupling for low-corrosive conductive medium working conditions provided by the present invention solves the torque transmission between the drive shaft and the driven shaft of the low-temperature submersible pump that transports corrosive media, and solves the heat accumulation problem caused by eddy current loss of the magnetic coupling and the operation stability problem of low-temperature corrosive media;

[0033] 2. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions provided by the present invention adopts a non-metallic isolation sleeve, which avoids the phenomenon of heat accumulation in the coupling caused by eddy currents generated by the metal isolation sleeve continuously cutting the magnetic lines of force during operation, and can effectively improve the efficiency of the magnetic coupling and reduce energy consumption;

[0034] 3. The zero eddy current loss magnetic coupling for low-corrosive conductive medium working conditions provided by the present invention adopts a non-metallic high-strength isolation sleeve, which can realize the transmission of torque and can also isolate the motor from corrosive and conductive media to prevent the medium from leaking into the motor and causing corrosion to it;

[0035] 4. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions provided by the present invention uses samarium cobalt as the magnetic material for the inner rotor and the outer rotor. This material has good stability under low-temperature working conditions, and its magnetic performance is not easily affected by temperature, thus ensuring the stability of the drive under low temperature;

[0036] 5. The zero eddy current loss magnetic coupling for low-corrosive conductive medium working conditions provided by the present invention has a samarium-cobalt material as the magnetic material of the inner rotor and the outer rotor, which also has good corrosion resistance and can be used for a long time in a working environment of corrosive media.

[0037] In summary, the technical solution of the present invention solves the problems in the prior art of reduced efficiency and increased energy consumption due to heat accumulation, and corrosion caused by medium leakage into the interior of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a schematic diagram of the structure of the present invention.

[0040] In the figure: 1, driven shaft 2, non-metallic isolation sleeve 3, axial fixed end cover 4, outer rotor housing 5, outer rotor permanent magnet 6, outer rotor cage 8, outer rotor permanent magnet protection cover 9, axial limit clamp 10, outer rotor shaft connecting transition piece 11, main transmission shaft 12, equipment housing 13, inner rotor upper end cover 14, inner rotor shaft connecting transition piece 15, transmission key 16, inner rotor permanent magnet fixing seat 17, inner rotor cage 18, inner rotor permanent magnet protection cover 19, inner rotor permanent magnet 20, inner rotor lower end cover 21, sealing ring 22, isolation sleeve fixed end cover. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] like Figure 1 As shown, the present invention provides a zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions, including: a driven shaft 1, an inner rotor, a spacing sleeve, a main transmission shaft 11, an outer rotor and an equipment housing 12; the driven shaft 1 enters the interior of the equipment housing 12 through an axial hole at the bottom of the equipment housing 12, and the inner rotor is assembled at its shaft end; the main transmission shaft 11 enters the interior of the equipment housing 12 through an axial hole at the top of the equipment housing 12, and the outer rotor is assembled at its shaft end; the inner rotor and the outer rotor are isolated by a spacing sleeve, and the spacing sleeve is fixedly connected to the equipment housing by bolts.

[0049] The inner rotor comprises: an inner rotor upper end cover 13, an inner rotor shaft connection transition piece 14, a transmission key 15, an inner rotor permanent magnet fixing seat 16, an inner rotor squirrel cage 17, an inner rotor permanent magnet protection cover 18, an inner rotor permanent magnet 19, and an inner rotor lower end cover 20; the inner rotor shaft connection transition piece 14 is fixedly mounted on the top shaft end of the driven shaft 1, and the upper and lower ends of the outer side thereof are respectively equipped with the inner rotor upper end cover 13 and the inner rotor lower end cover 20; the inner rotor permanent magnet fixing seat 16 is connected to the inner rotor shaft connection transition piece 14 in the circumferential direction through the transmission key 15, and its axial positioning is determined by the inner rotor upper end cover 13 and the inner rotor lower end cover 20 cooperates with each other; the inner rotor cage 17 is connected to the inner rotor permanent magnet fixing seat 16 by a keyway to achieve circumferential positioning, and the axial positioning is achieved by the inner rotor upper end cover 13 and the inner rotor lower end cover 20 cooperate with each other; the inner rotor permanent magnet 19 is made of samarium cobalt material and is installed in the slot of the inner rotor cage 17 to achieve circumferential positioning, and each inner rotor permanent magnet 19 is fixed to the inner rotor permanent magnet fixing seat 16 by two screws in the radial direction; the inner rotor permanent magnet protection cover 18 is welded to the inner rotor upper end cover 13 and the inner rotor lower end cover 20 to achieve wrapping and protection of the inner rotor permanent magnet 19.

[0050] The outer rotor includes: an axial fixed end cover 3, an outer rotor housing 4, an outer rotor permanent magnet 5, an outer rotor cage 6, an outer rotor permanent magnet protection cover 8, an axial limit clamp 9 and an outer rotor shaft connection transition piece 10; the outer rotor shaft connection transition piece 10 is fixedly mounted on the lower shaft end of the main transmission shaft 11; the top of the outer rotor housing 4 is mounted on the flange surface at the bottom of the outer rotor shaft connection transition piece 10 by screws; the outer rotor cage 6 is mounted inside the outer rotor housing 3 by a keyway; the outer rotor permanent magnet 5 is made of samarium cobalt material and is installed The outer rotor cage 6 is provided with an axial limit ring 9 and an axial fixed end cover 3 at the upper and lower ends of the outer rotor permanent magnet 5, respectively, to provide circumferential positioning for the outer rotor permanent magnet 5 and the outer rotor cage 6, and to restrict the outer rotor permanent magnet 5 and the outer rotor cage 6 to the inside of the outer rotor housing 4; the upper and lower ends of the outer rotor permanent magnet protection cover 8 are respectively welded to the axial limit ring 9 and the axial fixed end cover 3, to provide protection for the outer rotor permanent magnet 5.

[0051] The isolation sleeve includes: a non-metal isolation sleeve 2 and an isolation sleeve fixed end cover 22; the non-metal isolation sleeve 2 and the isolation sleeve fixed end cover 22 are fixed to the device housing 12 by screws; the isolation sleeve fixed end cover 22 realizes the positioning of the non-metal isolation sleeve 2;

[0052] The non-metallic isolation sleeve 2 can achieve zero eddy current loss; the non-metallic isolation sleeve 2 is a cylindrical structure with a closed top, in which the inner rotor is sleeved to separate it from the outer rotor; the bottom edge of the non-metallic isolation sleeve 2 is turned outward for fixed connection with the equipment housing 12.

[0053] A sealing ring 21 is provided between the non-metallic isolation sleeve 2 and the equipment housing 12. The sealing ring 21 is deformed by extrusion under the pressure of the equipment plane and the sealing ring groove to ensure that the isolation sleeve has good sealing.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A zero eddy current loss magnetic coupling for low-corrosive conductive media working conditions, characterized by: The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions comprises: a driven shaft (1), an inner rotor, a spacer sleeve, a main transmission shaft (11), an outer rotor and an equipment housing (12); The driven shaft (1) enters the interior of the device housing (12) through the shaft hole at the bottom of the device housing (12), and the shaft end thereof is equipped with an inner rotor; The main transmission shaft (11) enters the interior of the equipment housing (12) through the shaft hole at the top of the equipment housing (12), and an outer rotor is mounted on the shaft end thereof; The magnetic materials in the inner rotor and the outer rotor are made of samarium cobalt; The inner rotor and the outer rotor are isolated by an isolation sleeve, and the isolation sleeve is fixedly connected to the device housing by bolts.

2. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions according to claim 1 is characterized in that: The inner rotor comprises: an inner rotor upper end cover (13), an inner rotor shaft connecting transition piece (14), a transmission key (15), an inner rotor permanent magnet fixing seat (16), an inner rotor squirrel cage (17), an inner rotor permanent magnet protection cover (18), an inner rotor permanent magnet (19), and an inner rotor lower end cover (20); The inner rotor shaft connecting transition piece (14) is fixedly mounted on the top shaft end of the driven shaft (1), and the upper and lower ends of the outer side thereof are respectively equipped with an inner rotor upper end cover (13) and an inner rotor lower end cover (20); The inner rotor permanent magnet fixing seat (16) is connected to the inner rotor shaft connecting transition piece (14) in the circumferential direction via a transmission key (15), and its axial positioning is achieved by the cooperation of the inner rotor upper end cover (13) and the inner rotor lower end cover (20); The inner rotor cage (17) is connected to the inner rotor permanent magnet fixing seat (16) via a keyway to achieve circumferential positioning, and axial positioning is achieved by the cooperation of the inner rotor upper end cover (13) and the inner rotor lower end cover (20); The inner rotor permanent magnets (19) are installed in the slots of the inner rotor cage (17) to achieve circumferential positioning, and each inner rotor permanent magnet (19) is fixed to the inner rotor permanent magnet fixing seat (16) by two screws in the radial direction; The inner rotor permanent magnet protection cover (18) is welded to the inner rotor upper end cover (13) and the inner rotor lower end cover (20) to wrap and protect the inner rotor permanent magnet (19).

3. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions according to claim 1 is characterized in that: The outer rotor comprises: an axially fixed end cover (3), an outer rotor housing (4), an outer rotor permanent magnet (5), an outer rotor cage (6), an outer rotor permanent magnet protection cover (8), an axial limiting clamping ring (9) and an outer rotor shaft connecting transition piece (10); The outer rotor shaft connecting transition piece (10) is fixedly mounted on the lower shaft end of the main transmission shaft (11); The top end of the outer rotor housing (4) is mounted on the flange surface at the bottom of the outer rotor shaft connecting transition piece (10) by means of screws; The outer rotor cage (6) is installed inside the outer rotor housing (3) through a keyway; The outer rotor permanent magnet (5) is installed in a mounting slot provided by the outer rotor cage (6) to achieve circumferential positioning of the outer rotor permanent magnet (5); The upper and lower ends of the outer rotor permanent magnet (5) are respectively provided with an axial limit clamp ring (9) and an axial fixed end cover (3) for providing circumferential positioning for the outer rotor permanent magnet (5) and the outer rotor cage (6), and for confining the outer rotor permanent magnet (5) and the outer rotor cage (6) inside the outer rotor housing (4); The upper and lower ends of the outer rotor permanent magnet protection cover (8) are respectively welded to the axial limit clamping ring (9) and the axial fixed end cover (3), so as to provide protection for the outer rotor permanent magnet (5).

4. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions according to claim 1 is characterized in that: The isolation sleeve comprises: a non-metal isolation sleeve (2) and an isolation sleeve fixed end cover (22); The non-metallic isolation sleeve (2) and the isolation sleeve fixed end cover (22) are fixed to the device housing (12) by screws; The isolation sleeve fixing end cover (22) realizes the positioning of the non-metal isolation sleeve (2).

5. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions according to claim 4 is characterized in that: The non-metallic isolation sleeve (2) can achieve zero eddy current loss; The non-metallic isolation sleeve (2) is a cylindrical structure with a closed top, in which the inner rotor is sleeved to separate it from the outer rotor; The bottom edge of the non-metallic isolation sleeve (2) is turned outwards for fixed connection with the device housing (12).

6. The zero eddy current loss magnetic coupling for low-corrosion conductive medium working conditions according to claim 4, characterized in that: A sealing ring (21) is provided between the non-metallic isolation sleeve (2) and the equipment housing (12). The sealing ring (21) is deformed by extrusion under the pressure of the equipment plane and the sealing ring groove, thereby ensuring that the isolation sleeve has good sealing.

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