CN219592178U

CN219592178U - Explosion-proof motor

Info

Publication number: CN219592178U
Application number: CN202320818812.1U
Authority: CN
Inventors: 杨斌; 王同响; 袁羲鑫
Original assignee: Sinobrook New Energy Technologies Shanghai Co Ltd
Current assignee: Sinobrook New Energy Technologies Shanghai Co Ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-08-25
Anticipated expiration: 2033-04-13

Abstract

The utility model relates to an explosion-proof motor, comprising: a motor housing; a motor rotor and a motor stator disposed inside a motor housing, wherein the motor rotor comprises: the magnetic steel is sleeved outside the rotor core; the magnetic steel sheath is sleeved outside the magnetic steel, flanges are respectively arranged at two ends of the magnetic steel sheath, and the magnetic steel sheath and the flanges are welded in a seamless manner; and the soft adhesive layer is used for coating the flange and the magnetic steel sheath. The magnetic steel sheath and the flange are welded in a seamless manner, so that the rotor is sealed, and the soft adhesive layer is used for carrying out secondary sealing protection on the rotor, so that the magnetic steel is not contacted with the outside, and the rotor eccentric instability caused by pulverization of the hydrogen embrittlement phenomenon is avoided. Moreover, when the rotor fails, the soft adhesive layer can avoid spark generated by collision of the stator and the rotor.

Description

Explosion-proof motor

Technical Field

The utility model relates to the technical field of motors, in particular to an explosion-proof motor.

Background

At present, a hydrogen circulation loop in a hydrogen fuel cell system is filled with hydrogen, the explosion concentration of the hydrogen is 5% -75%, and how to enable a motor in the hydrogen fuel cell system to stably and safely operate in a hydrogen-rich system is irrespectively slow.

Disclosure of Invention

To solve at least some of the above problems in the prior art, the present utility model provides an explosion-proof motor, comprising:

a motor housing;

a motor rotor and a motor stator disposed inside a motor housing, wherein the motor rotor comprises:

the magnetic steel is sleeved outside the rotor core;

the magnetic steel sheath is sleeved outside the magnetic steel, flanges are respectively arranged at two ends of the magnetic steel sheath, and the magnetic steel sheath and the flanges are welded in a seamless manner;

and the soft adhesive layer is used for coating the flange and the magnetic steel sheath.

Further, the motor rotor further comprises a rotor rotating shaft and a rotor iron core sleeved outside the rotor rotating shaft.

Further, temperature switches are arranged on three phase lines of the motor stator and used for controlling the three phase lines to be disconnected according to temperature.

Further, the temperature switch is arranged at the root of the three-phase wire of the motor stator.

Further, the welding depth of the magnetic steel sheath and the flange is at least 0.5mm.

Further, the thickness of the soft adhesive layer is at least 0.02mm.

Further, the magnetic steel and the rotor core are bonded through bonding glue.

Further, the soft adhesive layer is an insulating soft material layer.

Further, bearings are provided at both ends of the motor rotor, and the bearings are sealed by bearing sealing structures.

Further, the bearing seal structure includes seal structure main part, sealed inner lip, sealed lid and braced skeleton, wherein:

the sealing structure body, the sealing inner lip and the sealing cover are integrally formed, and the sealing inner lip and the sealing cover are positioned at two ends of the sealing structure body;

the support framework is of an integrated structure and comprises a support main body and a sealing cover support body;

the support body is tightly fixed with the sealing structure body, the sealing cover support body is covered in the sealing cover, and the support body part is covered in the sealing inner lip.

The utility model has at least the following beneficial effects: in the motor rotor, the magnetic steel sheath and the flange are welded in a seamless manner, so that the rotor is sealed, and the soft adhesive layer is used for carrying out secondary sealing protection on the rotor, so that the magnetic steel is not contacted with the outside, and the rotor is not eccentric and unstable due to pulverization caused by a hydrogen embrittlement phenomenon. Moreover, when the rotor fails, the soft adhesive layer can avoid spark generated by collision of the stator and the rotor. All be provided with temperature switch on the three-phase line of motor stator, when the temperature is greater than 180 degrees, temperature switch disconnection for three-phase line disconnection prevents that the three-phase line in the motor from catching fire because of the high temperature. The bearings at the two ends of the motor rotor are sealed by the bearing sealing structures, so that the sealing isolation between the inside and the outside of the bearings can be ensured, and collision spark caused by bearing failure is prevented from igniting hydrogen.

Drawings

To further clarify the above and other advantages and features of embodiments of the present utility model, a more particular description of embodiments of the utility model will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the utility model and are therefore not to be considered limiting of its scope. In the drawings, for clarity, the same or corresponding parts will be designated by the same or similar reference numerals.

FIG. 1 shows a schematic cross-sectional view of a hydrogen circulation pump according to one embodiment of the present utility model;

FIG. 2 shows an enlarged schematic view of portion A of FIG. 1 in accordance with one embodiment of the utility model;

FIG. 3 shows a schematic cross-sectional view of a motor rotor according to one embodiment of the utility model;

FIG. 4 shows a schematic cross-sectional view of a bearing according to an embodiment of the utility model; and

fig. 5 shows an enlarged schematic view of part B of fig. 4 according to an embodiment of the utility model.

Detailed Description

It should be noted that the components in the figures may be shown exaggerated for illustrative purposes and are not necessarily to scale.

In the present utility model, the embodiments are merely intended to illustrate the scheme of the present utility model, and should not be construed as limiting.

In the present utility model, the adjectives "a" and "an" do not exclude a scenario of a plurality of elements, unless specifically indicated.

It should also be noted herein that in embodiments of the present utility model, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that the components or assemblies may be added as needed for a particular scenario under the teachings of the present utility model.

It should also be noted herein that, within the scope of the present utility model, the terms "identical", "equal" and the like do not mean that the two values are absolutely equal, but rather allow for some reasonable error, that is, the terms also encompass "substantially identical", "substantially equal".

It should also be noted herein that in the description of the present utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not explicitly or implicitly indicate that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as limiting or implying any relative importance.

In addition, the embodiments of the present utility model describe the process steps in a specific order, however, this is only for convenience of distinguishing the steps, and not for limiting the order of the steps, and in different embodiments of the present utility model, the order of the steps may be adjusted according to the adjustment of the process.

FIG. 1 shows a schematic cross-sectional view of a hydrogen circulation pump according to one embodiment of the present utility model; FIG. 2 shows an enlarged schematic view of portion A of FIG. 1 in accordance with one embodiment of the utility model;

FIG. 3 shows a schematic cross-sectional view of a motor rotor according to one embodiment of the utility model; FIG. 4 shows a schematic cross-sectional view of a bearing according to an embodiment of the utility model; fig. 5 shows an enlarged schematic view of part B of fig. 4 according to an embodiment of the utility model.

As shown in fig. 1, a hydrogen circulation pump comprises an explosion-proof motor and a hydrogen circulation pump head 1 which are fixedly connected. The explosion-proof motor comprises a motor rotor 10, a motor stator 11, a motor shell 12 and a bearing 13. The motor rotor 10 and the motor stator 11 are both disposed inside the motor casing 12. Bearings 13 are provided at both ends of the motor rotor 10.

As shown in fig. 1 and 2, temperature switches 20 are provided on three phase lines of the motor stator 11 for controlling the three phase line to be disconnected according to temperature. When the temperature of the three phase lines is greater than 180 degrees, the temperature switch is turned off, so that the three-phase line is disconnected, and the three phase lines in the motor are prevented from catching fire due to overhigh temperature. The temperature switch is made of a temperature-sensitive metal material, and when the temperature of the temperature switch is greater than 180 degrees, the temperature switch is instantly disconnected without delay and external control. The temperature switch is arranged at the root of the three-phase line connection of the motor stator 11, and the temperature switch and the motor stator 11 are encapsulated together by pouring sealant.

As shown in fig. 3, the motor rotor 10 includes a rotor shaft 101, a rotor core 102, magnetic steel 103, a magnetic steel sheath 104, a flange 105, and a soft adhesive layer 106. The rotor core 102 is sleeved outside the rotor shaft 101. The magnetic steel 103 is sleeved outside the rotor core 102, and the magnetic steel 103 and the rotor core 102 are bonded together through bonding glue. The magnetic steel sheath 104 is sleeved outside the magnetic steel 103, flanges 105 are respectively arranged at two ends of the magnetic steel sheath 104, the magnetic steel sheath 104 and the flanges 105 are welded in a seamless mode in a laser welding mode, and the welding depth of the magnetic steel sheath 104 and the flanges 105 is at least 0.5mm. The rotor core 102, the magnetic steel 103, the magnetic steel sheath 104 and the flange 105 are connected into a seamless whole.

The soft adhesive layer 106 coats the flange 105 and the magnetic steel sheath 104, and the thickness of the soft adhesive layer 106 is at least 0.02mm. The soft adhesive layer 106 is used for performing secondary sealing protection on the rotor. In addition, when the rotor fails, the soft adhesive layer 106 can avoid the stator and rotor collision from generating sparks. The soft adhesive layer 106 is an insulating soft material layer. The soft gel layer 106 includes, but is not limited to, a rubber layer or a nylon layer.

The device of the hydrogen path in the hydrogen fuel cell system is in a complete hydrogen environment, and in the hydrogen environment, certain alloys and metals can generate a hydrogen embrittlement phenomenon, wherein the magnetic steel of the motor is formed by mixing and sintering materials such as rubidium-iron-boron, and the like, wherein the tissue structure is loose, and the magnetic steel is easy to scatter when the hydrogen embrittlement occurs.

The magnetic steel sheath 104 and the flange 105 are welded in a seamless manner, so that the rotor is sealed, and the soft adhesive layer 106 is used for carrying out secondary sealing protection on the rotor, so that the magnetic steel 103 is not contacted with the outside, and the rotor eccentric instability caused by pulverization due to the hydrogen embrittlement phenomenon is avoided.

As shown in fig. 4 and 5, the bearing 13 is sealed by a bearing seal structure 14. The bearing 13 is a deep groove ball bearing, and the bearing 13 includes an outer ring 131, an inner ring 132, and balls. Sealing grooves are formed in the inner side of the outer ring 131 and the inner ring 132.

The bearing seal structure 14 is generally annular in shape. The bearing seal structure 14 includes a seal structure body, a seal inner lip 141, a seal cover 142, and a support frame 143.

The seal structure body, the seal inner lip 141 and the seal cover 142 are integrally formed, and the seal inner lip 141 and the seal cover 142 are located at both ends of the seal structure body.

The supporting framework 143 is an integral structure and is in a circular ring shape as a whole. The support frame 143 includes a support body and a seal cover support. The support body is tightly fixed with the seal structure body, the seal cover support body is enclosed in the seal cover 142, and the support body portion is enclosed in the seal inner lip 141.

The seal cover 142 is sealingly connected to the seal groove of the outer ring 131, and the seal inner lip 141 is sealingly connected to the seal groove of the inner ring 132. The material of the seal inner lip 141 is Polytetrafluoroethylene (PTFE) material, and the material of the seal cover 142 is a mixed material of nylon and polytetrafluoroethylene. The bearing sealing structure can well seal the bearing in the bearing rotation process, can ensure that the inside and the outside of the bearing are sealed and isolated, and prevent collision spark caused by bearing failure from igniting hydrogen.

Although some embodiments of the present utility model have been described in the present document, those skilled in the art will appreciate that these embodiments are shown by way of example only. Numerous variations, substitutions and modifications will occur to those skilled in the art in light of the present teachings without departing from the scope of the utility model. The appended claims are intended to define the scope of the utility model and to cover such methods and structures within the scope of these claims themselves and their equivalents.

Claims

1. An explosion-proof motor, comprising:

a motor housing;

the magnetic steel is sleeved outside the rotor core;

2. The explosion-proof motor of claim 1, wherein the motor rotor further comprises a rotor shaft and a rotor core sleeved outside the rotor shaft.

3. An explosion-proof motor according to claim 1, wherein temperature switches are arranged on three phase lines of the motor stator for controlling the three phase line to be disconnected according to temperature.

4. An explosion-proof electric machine according to claim 3, wherein the temperature switch is provided at the root of the three phase line connection of the motor stator.

5. An explosion-proof machine as claimed in claim 1, wherein the welding depth of the magnetic steel sheath and the flange is at least 0.5mm.

6. An explosion proof machine according to claim 1, wherein the thickness of the soft gel layer is at least 0.02mm.

7. The explosion-proof motor according to claim 1, wherein the magnetic steel and the rotor core are bonded by bonding glue.

8. An explosion-proof machine according to claim 1, wherein the soft gel layer is an insulating soft material layer.

9. An explosion-proof machine as claimed in claim 1, further comprising bearings provided at both ends of the motor rotor, and the bearings are sealed by bearing sealing structures.

10. The explosion proof machine of claim 9, wherein said bearing seal arrangement comprises a seal arrangement body, a seal inner lip, a seal cover and a support frame, wherein: