CN113783345A - Motor with higher protective capability - Google Patents
Motor with higher protective capability Download PDFInfo
- Publication number
- CN113783345A CN113783345A CN202011333937.2A CN202011333937A CN113783345A CN 113783345 A CN113783345 A CN 113783345A CN 202011333937 A CN202011333937 A CN 202011333937A CN 113783345 A CN113783345 A CN 113783345A
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- cover
- motor
- shell
- housing
- bearing cover
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- 230000001681 protective effect Effects 0.000 title description 5
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 19
- 230000001050 lubricating effect Effects 0.000 description 5
- 239000004519 grease Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The utility model provides a motor with higher protection capability, which comprises a housing component, a stator component and a rotor component, wherein the stator component is fixedly connected with the housing component, and the rotor component is rotationally connected with the stator component; the shell assembly comprises a shell, a shell end cover, an inner bearing cover and an outer bearing cover, wherein the shell end cover is fixedly arranged at the opening end of the shell and closes the opening end, the inner bearing cover is arranged at one side of the shell end cover positioned in the shell, the outer bearing cover is arranged at one side of the shell end cover positioned outside the shell, and a main shaft of the rotor assembly sequentially penetrates through holes in the inner bearing cover, the shell end cover and the outer bearing cover from inside to outside; a first sealing ring is arranged between the inner bearing cover and the shell end cover, and a second sealing ring is arranged between the outer bearing cover and the shell end cover. The motor has excellent protection capability and can meet the use requirements under various scenes.
Description
Technical Field
The disclosure relates to the technical field of motors, in particular to a motor with higher protection capability.
Background
In the real industrial field, the electric motor is an indispensable part for supplying power. Generally, high-protection-level electric motors are mainly applied to machines needing to be driven, and are generally used in water pumping stations, cooling towers or other industrial facilities, particularly in environments for handling dangerous water. The motor with high protection level is suitable for being used in flood-prone areas. In addition, such high protection grade electric motors may also be applied in crushing designs in the mining industry, compressors in the mechanical industry, water pumps in generators, cutting machines in some mechanical industries, and the like.
With the rapid development of industrial electronic technology, the demand of the industrial field for the protection capability of the motor is higher and higher, and the traditional motor cannot meet the current demand.
Disclosure of Invention
The present disclosure provides a motor with high protection capability for solving the problem that the protection capability of the conventional motor cannot meet the industrial requirement.
The disclosure provides a motor with high protection capacity, which comprises a housing assembly, a stator assembly and a rotor assembly, wherein the stator assembly is fixedly connected with the housing assembly, and the rotor assembly is rotatably connected with the housing assembly;
the shell assembly comprises a shell, a shell end cover, an inner bearing cover and an outer bearing cover, wherein the shell end cover is fixedly arranged at the opening end of the shell and closes the opening end, the inner bearing cover is arranged at one side of the shell end cover positioned in the shell, the outer bearing cover is arranged at one side of the shell end cover positioned outside the shell, and a main shaft of the rotor assembly sequentially penetrates through holes in the inner bearing cover, the shell end cover and the outer bearing cover from inside to outside;
a first sealing ring is arranged between the inner bearing cover and the shell end cover, and a second sealing ring is arranged between the outer bearing cover and the shell end cover.
In some alternative embodiments, at least two adjacent skeleton oil seals are disposed between the outer bearing cover and the main shaft.
In some alternative embodiments, a third seal ring is disposed between the housing end cap and the housing.
In some optional embodiments, the motor further comprises a junction box, wherein the junction box comprises a junction box base and a junction box cover, the junction box base is fixedly connected with the shell, and the junction box cover is fixedly connected with the junction box base;
and a sealing cushion is arranged between the junction box base and the shell, and a sealing cover cushion is arranged between the junction box cover and the junction box base.
In some optional embodiments, the junction box further comprises a wiring board and a waterproof connector, wherein the wiring board and the waterproof connector are respectively and fixedly connected with the junction box base;
the bottom and the top of wiring board are provided with sealed pad of first wiring board and the sealed pad of second wiring board respectively, waterproof joint with be provided with waterproof joint sealed pad between the terminal box seat.
In some alternative embodiments, a sealant is disposed within the terminal block receptacle.
In some alternative embodiments, at least one of the sealing seat cushion and the sealing cover cushion is a high performance, high temperature resistant silicone rubber material. In some alternative embodiments, the motor is a three-phase asynchronous motor.
In some alternative embodiments, the housing is provided with a plurality of drainage holes.
In some alternative embodiments, the motor has a protection rating of IP 67.
This openly provides motor that has higher protective capacities, is provided with first sealing washer between interior bearing cap and the casing end cover, is provided with the second sealing washer between outer bearing cap and the casing end cover, has realized the double-deck sealing of casing end cover department, and then has improved the holistic protective capacities of motor greatly for this motor can satisfy the user demand under the multiple scene.
Drawings
Other features, objects and advantages of the disclosure will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic view from one perspective of a motor according to an embodiment of the present disclosure;
FIG. 2 is a first partial schematic view of an electric motor according to an embodiment of the present disclosure;
FIG. 3 is a second partial schematic view of an electric motor according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of a stator structure of an electric motor according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of a rotor structure of a motor according to an embodiment of the present disclosure;
fig. 6 is a schematic structural view of a terminal box of a motor according to an embodiment of the present disclosure.
Description of the symbols: 1-front end oil seal; 1 a-a first framework oil seal; 1 b-a second framework oil seal; 2-a main shaft; 3-front end retainer ring; 4-front end outer bearing cap; 5-hexagon bolts; 6-front end bearing; 7-front end inner bearing cap; 8-front end outer sealing ring; 9-front end cover; 10-a housing; 11-a stator assembly; 12-a rotor; 13-an axial fan; 14-rear end cap; 15-rear end inner bearing cap; 16-a rear end outer bearing cap; 17-rear end oil seal; 18-a rear end retainer ring; 19-rear fan retainer ring; 20-a rear end bearing; 21-rear end fan; 22-a fan cover; 23-axial fan retainer ring; 24-front end inner seal ring; 25-oil baffle disc; 26-a junction box; 2601-a terminal box base; 2602-sealing the cushion; 2603 — a first terminal block gasket; 2604 — a patch panel; 2605-sealing glue; 2606-a junction box cover; 2607-a junction box cover screw sealing pad; 2608-a waterproof joint; 2609-a waterproof joint seal; 2610-sealing cover pad; 2611-a second patch panel gasket; 27-inner sealing ring of the shell; 28-sealing gasket.
Detailed Description
The present disclosure is described in further detail below with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Fig. 1 is a schematic view from one perspective of an electric motor according to an embodiment of the present disclosure, and fig. 2 is a first partial schematic view of an electric motor according to an embodiment of the present disclosure. In the present embodiment, one end of the motor spindle that outputs power is referred to as a front end (for example, one end on the left side in fig. 1), and the other end opposite to the front end is referred to as a rear end (for example, one end on the right side in fig. 1).
Referring to fig. 1 and 2, the motor in the present embodiment includes a housing assembly, a stator assembly 11 and a rotor assembly, wherein the stator assembly 11 is fixedly connected with the housing assembly, and the rotor assembly is rotatably connected with the housing assembly.
In this embodiment, the rotor assembly includes a rotor 12 and a main shaft 3, wherein the rotor 12 is fixedly sleeved on the main shaft 3.
In this embodiment, the housing assembly comprises a housing 10, housing end caps, an inner bearing cap and an outer bearing cap. Wherein the housing end cover comprises a front end cover 9 and a rear end cover 14. The inner bearing caps comprise a front end inner bearing cap 7 and a rear end inner bearing cap 15. The outer bearing caps include a front end outer bearing cap 4 and a rear end outer bearing cap 16.
In this embodiment, the housing end cap is fixedly disposed at the open end of the housing and closes the open end. For example, the front cover 9 is provided at and closes the front opening end of the housing 10. As another example, the rear end cap 14 is provided at and closes the rear open end of the housing 10.
In this embodiment, the inner bearing cap is disposed on one side of the housing end cap inside the housing, the outer bearing cap is disposed on one side of the housing end cap outside the housing, and the main shaft of the rotor assembly sequentially penetrates through the holes in the inner bearing cap, the housing end cap, and the outer bearing cap from inside to outside. For example, the front end inner bearing cover 7 is provided on the side of the front end cover 9 outside the housing, and the front end outer bearing cover 4 is provided on the side of the front end cover 9 outside the housing. For another example, the rear inner bearing cap 15 is provided on the side of the rear end cap 14 inside the housing, and the rear outer bearing cap 16 is provided on the side of the rear end cap 14 outside the housing.
In this embodiment, a first seal ring is disposed between the inner bearing cap and the housing end cap, and a second seal ring is disposed between the outer bearing cap and the housing end cap. The first sealing ring comprises a front end inner sealing ring and a rear end inner sealing ring, and the second sealing ring comprises a rear end inner sealing ring and a rear end outer sealing ring. For example, a front end inner seal ring 24 is provided between the front end inner bearing cap 7 and the front end cap 9, and a front end outer seal ring 8 is provided between the front end outer bearing cap 4 and the front end cap 9. For another example, a rear end inner seal ring (not shown in fig. 1 and 2) is provided between the rear end inner bearing cap 15 and the rear end cap 14, and a rear end outer seal ring (not shown in fig. 1 and 2) is provided between the rear end outer bearing cap 16 and the rear end cap 14.
In this embodiment, be provided with first sealing washer between interior bearing cap and the casing end cover, be provided with the second sealing washer between outer bearing cap and the casing end cover, realized the double-deck sealing of casing end cover department, and then improved the holistic protective capacities of motor greatly for the user demand under multiple scene can be satisfied to this motor.
In some alternative embodiments, at least two adjacent skeleton oil seals are disposed between the outer bearing cap and the main shaft. For example, in fig. 3, the front end oil seal 1 is disposed between the front end outer bearing cover 4 and the main shaft 2, and the front end oil seal 1 further includes two adjacent skeleton oil seals, i.e., a first skeleton oil seal 1a and a second skeleton oil seal 1 b. Thus, the protection capability of the motor can be further improved.
It will be readily appreciated that the rear end oil seal 17 between the rear end outer bearing cap and the main shaft may also be provided with at least two adjacent skeleton oil seals.
It is easy to understand that the number of the adjacent framework oil seals can be selected according to actual conditions, and is 2, 3 or 5, for example.
In some alternative embodiments, a third seal ring is disposed between the housing end cap and the housing. For example, an inner housing sealing ring 27 is provided between the front end cap 9 and the housing 10. Thus, the protection capability of the motor can be further improved.
In some optional embodiments, the motor further comprises a junction box, the junction box comprises a junction box base and a junction box cover, the junction box base is fixedly connected with the shell, and the junction box cover is fixedly connected with the junction box base; a sealing cushion is arranged between the junction box base and the shell, and a sealing cover cushion is arranged between the junction box cover and the junction box base.
As shown in fig. 1 and 6, the junction box 26 includes a junction box holder 2601 and a junction box cover 2606. The terminal block 2601 is fixedly connected to the housing 10 with a sealing cushion 2602 interposed therebetween. The terminal box cover 2606 is fixedly connected to the terminal box holder 2601, and a sealing gasket 2610 is disposed between the terminal box cover and the terminal box holder 2601. Therefore, the integral protection capability of the motor is further improved.
In one example, the terminal block base 2601 and the terminal block cover 2606 are fixedly connected by bolts. A junction box cover screw seal 2607 is provided between the junction box cover 2606 and the connecting bolt.
In some optional embodiments, the junction box further comprises a wiring board and a waterproof connector, wherein the wiring board and the waterproof connector are respectively and fixedly connected with the junction box base; the bottom and the top of wiring board are provided with sealed pad of first wiring board and the sealed pad of second wiring board respectively, are provided with the sealed pad of waterproof joint between waterproof joint and the terminal box seat.
As shown in fig. 6, the terminal block 2604 is fixedly disposed within the terminal block housing 2601. A first terminal block seal 2603 is provided at the bottom end of terminal block 2604 and a second terminal block seal 2611 is provided at the top end of terminal block 2604. Waterproof connector 2608 is fixedly disposed in terminal block housing 2601, and a waterproof connector gasket 2609 is disposed between waterproof connector 2608 and terminal block housing 2601. Therefore, the integral protection capability of the motor is further improved.
In some alternative embodiments, a sealant is disposed within the terminal block receptacle. For example, after the entire junction box is assembled, the sealant 2605 is used for potting and sealing, so as to improve the protection capability of the junction box and the entire motor.
In some alternative embodiments, at least one of the sealing seat cushion and the sealing cover cushion is made of high-performance high-temperature-resistant silicone rubber material so as to obtain a good protection effect.
In some alternative embodiments, the motor has an output power of 1300kW, a rated voltage of 4160V, and a rated frequency of 60 Hz. In addition, the pole number of the motor is 6, the designed efficiency value is 95.8%, the designed power factor value is 0.87, the calculation type is a steady-state mode, and the electromagnetic wire is a modified polyester enameled copper wire.
In some alternative embodiments, the motor is a three-phase asynchronous motor. In one example, the high-voltage asynchronous motor has three-phase current passing through the stator winding for starting and running, a rotating magnetic field is generated in the stator core, the static rotor and the rotating magnetic field have phase motion, the rotor wire cuts the magnetic line of force to generate induced electromotive force, the rotor wire is a closed loop to generate induced current, and the current generates electromagnetic force under the action of the magnetic field to make the rotor rotate along with the rotating direction of the rotating magnetic field.
In some alternative embodiments, the housing is provided with a plurality of drainage holes. For example, 4 drain holes uniformly distributed can be designed on the shell of the motor, so that the condition that the rest drain holes can work after the single drain hole is blocked due to severe outdoor environment is ensured, and the reliability and the long service life of the motor are ensured.
In one example, the motor includes, in addition to the above components, a retainer ring 3, a hexagon bolt 5, a front end bearing 6, an axial flow fan 13, a rear end retainer ring 18, a rear end fan retainer ring 19, a rear end bearing 20, a rear end fan 21, a shroud 22, an axial flow fan retainer ring 23, and a windage tray 25. The structure and function of these components are readily understood by those skilled in the art and will not be described in detail herein.
In one example, the rotor 12 is rotationally disposed within the stator assembly 11. The rotor 12 further comprises a rotor core and a rotor cage, the rotor cage is made of cast aluminum alloy HRA23-1, and a plurality of parallel tooth grooves are arranged on the rotor core, so that the resistance of the rotor 12 is improved, and the slip ratio is increased. The front end oil seal 1 adopts double-framework sealing, such as SKF brand steel cover seal ring structure. The lubricating grease of the front-end oil seal 1 can be selected from lithium-based lubricating grease which is SKFLGLT2 and takes synthetic oil as base oil, the special thickener technology and low-viscosity oil of the lubricating grease can realize excellent lubricating performance, the lubricating grease is suitable for working at low temperature of-50 ℃ and high temperature of 110 ℃, and the service life of a motor is prevented from being shortened due to lubrication failure of a main shaft of the motor. The structure of the rotor 12 is shown in fig. 5.
In one example, the material of the iron core of the stator assembly 11 may be 50DW470 silicon steel sheets, the iron core of the stator assembly 11 is formed by laminating punching sheets, corona-resistant electromagnetic wires are embedded in the slots of the iron core, the stator assembly 11 with windings is obtained after vacuum pressure paint dipping treatment, and then the stator assembly is pressed into the housing assembly by pressure. The stator assembly 11 is constructed as shown in fig. 4.
In one example, all the fastening bolts of all the parts are stainless steel bolts due to the requirement of working conditions, and the corrosion resistance is not lower than the requirement of C4.
In one example, the motor is rated for protection IP 67.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept as defined above. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Claims (10)
1. The motor with high protection capability is characterized by comprising a housing assembly, a stator assembly and a rotor assembly, wherein the stator assembly is fixedly connected with the housing assembly, and the rotor assembly is rotationally connected with the stator assembly;
the shell assembly comprises a shell, a shell end cover, an inner bearing cover and an outer bearing cover, wherein the shell end cover is fixedly arranged at the opening end of the shell and closes the opening end, the inner bearing cover is arranged at one side of the shell end cover positioned in the shell, the outer bearing cover is arranged at one side of the shell end cover positioned outside the shell, and a main shaft of the rotor assembly sequentially penetrates through holes in the inner bearing cover, the shell end cover and the outer bearing cover from inside to outside;
a first sealing ring is arranged between the inner bearing cover and the shell end cover, and a second sealing ring is arranged between the outer bearing cover and the shell end cover.
2. The motor of claim 1, wherein at least two adjacent skeleton oil seals are disposed between the outer bearing cap and the main shaft.
3. The motor of claim 2, wherein a third seal ring is disposed between the housing end cap and the housing.
4. The motor of claim 1, further comprising a terminal box, wherein the terminal box comprises a terminal box base and a terminal box cover, the terminal box base is fixedly connected with the housing, and the terminal box cover is fixedly connected with the terminal box base;
and a sealing cushion is arranged between the junction box base and the shell, and a sealing cover cushion is arranged between the junction box cover and the junction box base.
5. The motor of claim 4, wherein the terminal block further comprises a terminal block and a waterproof connector, the terminal block and the waterproof connector being fixedly connected to the terminal block holder, respectively;
the bottom and the top of wiring board are provided with sealed pad of first wiring board and the sealed pad of second wiring board respectively, waterproof joint with be provided with waterproof joint sealed pad between the terminal box seat.
6. The motor of claim 4 wherein said terminal block receptacle is provided with a sealant.
7. The motor of claim 4, wherein at least one of the seal cushion and the seal cover cushion is a high performance, high temperature resistant silicone rubber material.
8. The motor according to any one of claims 1-7, wherein the motor is a three-phase asynchronous motor.
9. An electric motor according to any one of claims 1-7, wherein the housing is provided with a plurality of drainage holes.
10. The motor of any one of claims 1-7, wherein the motor has a protection rating of IP 67.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011333937.2A CN113783345A (en) | 2020-11-24 | 2020-11-24 | Motor with higher protective capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011333937.2A CN113783345A (en) | 2020-11-24 | 2020-11-24 | Motor with higher protective capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113783345A true CN113783345A (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011333937.2A Pending CN113783345A (en) | 2020-11-24 | 2020-11-24 | Motor with higher protective capability |
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| Country | Link |
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| CN (1) | CN113783345A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780303A (en) * | 2012-07-27 | 2012-11-14 | 抚顺煤矿电机制造有限责任公司 | Motor shaft sealing structure with high protection grade |
| CN202978530U (en) * | 2012-11-29 | 2013-06-05 | 南阳防爆集团股份有限公司 | Low voltage anti-strong water spraying explosion proof marine motor |
| CN204465284U (en) * | 2015-03-24 | 2015-07-08 | 浙江万时达电机有限公司 | A kind of Flame-Proof Three-Phase Induction Motors |
| CN208316474U (en) * | 2018-05-31 | 2019-01-01 | 南阳防爆电气研究所有限公司 | A kind of flame-proof type three-phase motor |
| CN109217546A (en) * | 2018-09-26 | 2019-01-15 | 安徽正华电气有限公司 | A kind of motor and its connection box for motor |
-
2020
- 2020-11-24 CN CN202011333937.2A patent/CN113783345A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780303A (en) * | 2012-07-27 | 2012-11-14 | 抚顺煤矿电机制造有限责任公司 | Motor shaft sealing structure with high protection grade |
| CN202978530U (en) * | 2012-11-29 | 2013-06-05 | 南阳防爆集团股份有限公司 | Low voltage anti-strong water spraying explosion proof marine motor |
| CN204465284U (en) * | 2015-03-24 | 2015-07-08 | 浙江万时达电机有限公司 | A kind of Flame-Proof Three-Phase Induction Motors |
| CN208316474U (en) * | 2018-05-31 | 2019-01-01 | 南阳防爆电气研究所有限公司 | A kind of flame-proof type three-phase motor |
| CN109217546A (en) * | 2018-09-26 | 2019-01-15 | 安徽正华电气有限公司 | A kind of motor and its connection box for motor |
Non-Patent Citations (1)
| Title |
|---|
| 芮静康等: "《中小型电机修理手册》", 31 July 1997 * |
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Application publication date: 20211210 |
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