CN111711306B - Explosion-proof structure of drum motor - Google Patents
Explosion-proof structure of drum motor Download PDFInfo
- Publication number
- CN111711306B CN111711306B CN202010853682.6A CN202010853682A CN111711306B CN 111711306 B CN111711306 B CN 111711306B CN 202010853682 A CN202010853682 A CN 202010853682A CN 111711306 B CN111711306 B CN 111711306B
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- explosion
- shaft sleeve
- proof structure
- motor according
- side wall
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- 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
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
-
- 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
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to the technical field of explosion-proof motors, and provides an explosion-proof structure of a roller motor, which comprises a rotating shaft (1), a rolling bearing (2), an end cover (3), a shaft sleeve (4), a bearing cover (5) and an elastic piece (6), wherein the rolling bearing (2) is arranged between the end cover (3) and the rotating shaft (1); a mounting groove (7) is formed between the bearing cover (5) and the shaft sleeve (4), and the mounting groove faces away from the rolling bearing; the elastic piece is embedded into the mounting groove to support the bearing cover (5) and the shaft sleeve (4); in the radial direction, a first gap is formed between the bearing cover (5) and the shaft sleeve (4); the shaft sleeve (4) is in clearance fit with the rotating shaft (1). According to the explosion-proof structure of the roller motor, the service life can be ensured, and the high-efficiency working efficiency is kept under the condition of long-time working. Moreover, the whole structure of the explosion-proof structure is simple, but the explosion-proof structure is safe and reliable to use.
Description
Technical Field
The invention relates to the technical field of explosion-proof motors, in particular to an explosion-proof structure of a roller motor.
Background
The conventional roller explosion-proof structure is basically integrated, a gap of about 0.35 mm is reserved between an inner hole of a bearing cover and a rotating shaft, and the bearing cover is radially eccentric due to the fact that the roller is subjected to large radial tension of a belt.
Disclosure of Invention
The invention aims to solve the technical problems and provides an explosion-proof structure of a roller motor.
In order to achieve the purpose, the invention provides an explosion-proof structure of a roller motor, which comprises a rotating shaft, a rolling bearing, an end cover, a shaft sleeve, a bearing cover and an elastic part, wherein the rolling bearing is arranged between the end cover and the rotating shaft;
an installation groove is formed between the bearing cover and the shaft sleeve and faces away from the rolling bearing;
the elastic piece is embedded into the mounting groove and supports the bearing cover and the shaft sleeve;
a first gap is formed between the bearing cover and the shaft sleeve along the radial direction;
the shaft sleeve is in clearance fit with the rotating shaft.
According to one aspect of the invention, the bearing cap includes a connecting portion connected to the sleeve, and a mounting portion connected to the end cap away from the sleeve;
the thickness of the connecting part is smaller than that of the mounting part;
the connecting part is connected with one side of the mounting part close to the rolling bearing.
According to an aspect of the present invention, the mounting groove is formed by a side wall of the mounting portion, a side wall of the connecting portion, and a side wall of the boss.
According to one aspect of the invention, a first concave part, a convex part and a second concave part are sequentially arranged on one side of the shaft sleeve away from the rotating shaft along the direction away from the rolling bearing;
the first gap is formed between the first concave part and the end face of the connecting part;
the side wall of the bulge part close to the first recess part is abutted to the side wall of the connecting part.
According to an aspect of the present invention, one end of the elastic member is connected to the second recess portion, and the other end is connected to the mounting portion.
According to one aspect of the invention, a first positioning groove is formed in one side of the side wall of the mounting part, which is far away from the connecting part;
a second positioning groove is formed in one side, away from the protruding portion, of the second concave portion;
one end of the elastic piece is fixed in the first positioning groove, the other end of the elastic piece is fixed in the second positioning groove, and the elastic piece is integrally embedded into the mounting groove.
According to one aspect of the invention, the resilient member is a corrugated ring.
According to one aspect of the invention, the distance between the apex of the corrugated ring adjacent to the connecting portion and the side wall of the connecting portion is 0.5-1 mm.
According to one aspect of the invention, the width of the first gap is 2.5-3 mm.
According to one aspect of the present invention, a width of a gap between the boss and the rotation shaft is 0.15-0.3 mm.
According to one aspect of the invention, the material of the shaft sleeve is tin bronze powder metallurgy material, and an oil-containing structure for self-lubrication is arranged on the material.
According to one aspect of the invention, the surface of the rotating shaft, which is correspondingly matched with the shaft sleeve, is subjected to hardening and polishing treatment, and the surface roughness Ra is less than 0.4.
According to an aspect of the present invention, when the bearing cap rotates along with the end cap, the elastic member and the sleeve rotate together, a slight friction is generated between the sleeve and the rotation shaft, and since the bearing grease reaches the friction surface and there is no relative pressure, the friction force is small and no abrasion is generated. If the bearing cover and the rotating shaft generate radial eccentricity, the elastic piece compresses and extrudes outwards due to the characteristics of the elastic piece, so that the shaft sleeve floats along with the rotating shaft, great radial pressure cannot be generated, the shaft sleeve cannot be abraded, and the explosion-proof gap can be kept to meet the requirement.
According to one aspect of the present invention, the installation groove is arranged opposite to the rolling bearing, that is, the installation groove is isolated from the rolling bearing through the connecting portion, and this arrangement is advantageous in that when an accident occurs and gas explosion occurs inside the drum motor, the gas pressure pushes the shaft sleeve and the elastic member to move outward (i.e., in the direction of the rolling bearing), and then the shaft sleeve and the elastic member can be blocked by the bearing cover, specifically, the connecting portion of the bearing cover, and the contact surface is on the right side wall of the connecting portion. Thus, the elastic piece can not be greatly deformed and still maintain the sealing performance.
According to one scheme of the invention, the flame-proof gap is formed between the first sunken part of the shaft sleeve and the connecting part, and the flame-proof gap is formed between the shaft sleeve and the rotating shaft, so that the flame-proof structure has a radial compensation function, a bearing cover cannot be damaged even if the rolling bearing is damaged, the flame-proof gap cannot be damaged, and the flame-proof gap can be kept to meet the flame-proof requirement. Moreover, the connecting part is abutted to the protruding part beside the first recessed part, so that the explosion-proof structure is axially sealed. Meanwhile, the corrugated pipe is integrally arranged in the mounting groove, and the upper and lower extending mounting ends are positioned on the side surface of the integral gravity center, so that when gas explosion is generated in the roller, the air pressure can push the corrugated ring to move outwards, and the corrugated ring can be blocked by the bearing cover main body, thereby effectively preventing the corrugated ring from large deformation and still maintaining the sealing property,
the explosion-proof structure of the roller motor can ensure the service life and keep high-efficiency working efficiency under the condition of long-time work. Moreover, the whole structure of the explosion-proof structure is simple, but the explosion-proof structure is safe and reliable to use.
Drawings
FIG. 1 schematically shows a cross-sectional view of an explosion-proof structure of a drum motor according to an embodiment of the present invention;
fig. 2 schematically shows an enlarged view of a portion a in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
FIG. 1 schematically shows a cross-sectional view of an explosion-proof structure of a drum motor according to an embodiment of the present invention; fig. 2 schematically shows an enlarged view of a portion a in fig. 1.
Referring to fig. 1 and 2, in this embodiment, the explosion-proof structure of the drum motor includes a rotating shaft 1, a rolling bearing 2, an end cover 3, a shaft sleeve 4, a bearing cover 5, and an elastic member 6. Wherein, the rolling bearing 2 is arranged between the end cover 3 and the rotating shaft 1.
In the present embodiment, a mounting groove 7 is formed between the bearing cap 5 and the shaft sleeve 4, the mounting groove 7 is used for mounting the elastic member 6, and the mounting groove 7 is arranged away from the rolling bearing 2. In the present embodiment, the elastic member 6 is inserted into the mounting groove 7, and supports the bearing cap 5 and the sleeve 4 by its elastic characteristics, so that the bearing cap 5 and the sleeve 4 can be kept in stable positions when receiving an external force, and the structure can be secured.
Further, along the radial direction, that is, the up-down direction in fig. 1 and fig. 2, a first gap is formed between the bearing cover 5 and the shaft sleeve 4, and the first gap is an explosion-proof gap.
Moreover, in this embodiment, a gap is also provided between the shaft sleeve 4 and the rotating shaft 1, that is, the shaft sleeve and the rotating shaft are in clearance fit connection, and the gap is also an explosion-proof gap.
According to the above embodiment of the present invention, when the bearing cap 5 rotates along with the end cap 3, the elastic member 6 rotates together with the sleeve 4, slight friction is generated between the sleeve 4 and the rotation shaft 1, and since the bearing grease reaches the friction surface and there is no relative pressure, the friction force is small and no abrasion is generated. If the bearing cap 5 and the rotating shaft 1 generate radial eccentricity, the elastic element 6 compresses and extrudes outwards due to the characteristics of the elastic element, so that the shaft sleeve 4 can float along with the rotating shaft 1, great radial pressure cannot be generated, abrasion cannot be caused, and the explosion-proof gap can be kept to meet the requirement.
Further, according to an embodiment of the present invention, the bearing cap 5 includes a connecting portion 501 and a mounting portion 502. As shown in fig. 2, in the present embodiment, the mounting portion 502 is located above the connecting portion 501, has a relatively large thickness, and is mainly used for connecting with the end cap 3, and specifically, the mounting portion may be connected by a screw connection manner as shown in the figure. The connecting portion 501 is located below the mounting portion 502, has a relatively thin thickness, and is mainly used for connecting with the bushing 4. As shown in fig. 2, in the present embodiment, the connecting portion 501 and the mounting portion 502 are connected on the side close to the rolling bearing 2. Specifically, since the thickness of the connection portion 501 is smaller than that of the mounting portion 502, connection of the connection portion 501 with the left, center, or right side of the lower end portion of the mounting portion 502 may occur at the time of connection. In the present embodiment, as shown in fig. 2, the connecting portion 501 is connected to the left side of the lower end portion of the mounting portion 502, and is provided so that the connecting portion 501 and the mounting portion 502 have a step therebetween, and then the step faces away from the rolling bearing 2, so that the step forms the mounting groove 7 in cooperation with the sleeve 4, and it can be seen that the mounting groove 7 is formed by a side wall (lower side wall) of the mounting portion 502, a side wall (right side wall) of the connecting portion, and a side wall (upper side wall) of the sleeve 4.
According to the above embodiment of the present invention, the installation groove 7 is arranged opposite to the rolling bearing 2, i.e. the installation groove 7 is isolated from the rolling bearing 2 by the connecting portion 501, which is advantageous in that when an accident occurs and gas explosion occurs inside the drum motor, the gas pressure pushes the shaft sleeve 4 and the elastic member 6 to move outwards (i.e. towards the rolling bearing 2), and then the shaft sleeve 4 and the elastic member 6 can be blocked by the bearing cover 5, in particular by the connecting portion 501 of the bearing cover 5, and the contact surface is on the right side wall of the connecting portion 501. Thus, the elastic piece can not be greatly deformed and still maintain the sealing performance.
In the present embodiment, the elastic member 6 is a corrugated ring.
Further, according to an embodiment of the present invention, as shown in fig. 2, in a direction away from the rolling bearing 2 (i.e., a direction from left to right in fig. 2), a side of the sleeve 4 away from the rotating shaft 1 (i.e., an upper side of the sleeve 4 in fig. 2) is provided with a first recess 401, a projection 402, and a second recess 403 in this order. As shown in fig. 2, in the present embodiment, the first recess 401 is disposed in cooperation with the connecting portion 501, and has the same width, the connecting portion 501 extends into the first recess 401, and a gap is formed between the lower end surface of the connecting portion 501 and the first recess 401, where the gap is the above-mentioned first gap, and the first gap is an explosion-proof gap. Further, as shown in fig. 2, since sealing is required and a gap is formed between the first recess 401 and the connecting portion 501, the protrusion 402 is provided beside the first recess 401 in the present embodiment. As shown in fig. 2, the left side wall of the boss 402 and the side wall of the connecting portion 501 abut against each other, and thus the sealed connection between the bearing cap 5 and the sleeve 4 is achieved.
In addition, the second concave portion 403 on the right side of the convex portion 402 is used to connect with the bellows, as shown in fig. 2, the upper end of the bellows is connected with the lower sidewall of the mounting portion 502, and the lower end is connected with the second concave portion 403. Specifically, as shown in fig. 2, in the present embodiment, a first positioning groove 5021 is provided on the lower side wall of the mounting portion 502 on the side away from the connecting portion 501 (i.e., on the right side in fig. 2). A side of the second recess 403 remote from the boss 402 (i.e., the right side in fig. 2) is provided with a second positioning groove 4031. As shown in fig. 2, in the present embodiment, the upper end of the bellows is fixed in the first positioning groove 5021, and the lower end is fixed in the second positioning groove 4031, and as can be seen from fig. 2, in fact, the bellows is integrally embedded in the mounting groove 7, that is, the two ends (i.e., mounting ends) from which the bellows protrudes are respectively fixedly mounted on the end walls of the bearing cover 5 and the shaft sleeve 4, which refer to the side walls on the inner side of the drum motor, that is, the side away from the rolling bearing 2.
According to the embodiment of the invention, the explosion-proof gap is formed between the first concave part 401 of the shaft sleeve 4 and the connecting part 501, and the explosion-proof gap is formed between the shaft sleeve 4 and the rotating shaft 1, so that the explosion-proof structure has a radial compensation function, and even if the rolling bearing 2 is damaged, the bearing cover 5 cannot be damaged, the explosion-proof gap cannot be damaged, and the explosion-proof gap can be kept to meet the explosion-proof requirement. Furthermore, the connecting portion 501 abuts against the protruding portion 402 beside the first recessed portion 401, so that the explosion-proof structure is axially sealed. Simultaneously with bellows whole arrangement in mounting groove 7, and two upper and lower installation ends that stretch out are located whole centrobaric side (right flank promptly), make when the inside gas explosion that produces of cylinder, atmospheric pressure can promote the ripple ring outwards (promptly to antifriction bearing 2 direction) removal, at this moment the ripple ring can be blocked by bearing cap 5 main part (promptly connecting portion 501 right side wall), can make the ripple ring can not have big deformation effectively like this, still keep the leakproofness, increase working life simultaneously, guarantee drum motor's work efficiency.
Further, according to an embodiment of the present invention, the distance between the apex of the corrugated rim adjacent to the connection portion 501 and the right side wall of the connection portion 501 is 0.5 to 1 mm. This distance may be such that the corrugated ring does not deform significantly in this embodiment. Of course, the distance is not limited to the present invention, and it is only a preferred way, and the specific distance can be selected and changed according to the actual requirement, the usage scenario of the drum motor, and the specific parameters, etc., in the present invention, as long as it can ensure that the elastic member 6 (corrugated ring) can work normally for a long time in the deformable range and the fatigue strength range.
Further, according to an embodiment of the present invention, the width of the first gap between the connection portion 501 and the first recess 401 is 2.5 to 3mm, and the width of the gap between the bushing 4 and the rotation shaft 1 is 0.15 to 0.3 mm. Similarly, the widths of the two gaps are also only preferred modes, and the invention is not limited by the widths, so long as the gap width range can meet the explosion-proof requirement.
In addition, according to an embodiment of the present invention, the material of the shaft sleeve 4 is tin bronze powder metallurgy material, and the shaft sleeve 4 is provided with an oil-containing structure, i.e. oil-containing treatment, so that self-lubrication can be performed, and thus the self-lubrication performance can be maintained all the time without lubrication maintenance. In the present embodiment, the surface of the shaft 1 that is fitted to the boss 4 is subjected to a hardening and polishing treatment, and the surface roughness Ra is less than 0.4.
In conclusion, according to the embodiment of the invention, the explosion-proof structure of the roller motor can ensure the service life and maintain high-efficiency working efficiency under the condition of long-time work. Moreover, according to the above, the overall structure of the explosion-proof structure is simple, but the use is safe and reliable, and the bearing cover 5 and the shaft sleeve 4 are mainly matched in structure, so that when an accident occurs, namely gas explosion occurs in the roller, and the elastic part 6 and the shaft sleeve 4 are pushed by air pressure to move, the shapes of the elastic part 6 and the shaft sleeve 4 can be kept from being greatly influenced, and large deformation can not be generated, so that the sealing performance of the overall structure is ensured.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (11)
1. The explosion-proof structure of the roller motor is characterized by comprising a rotating shaft (1), a rolling bearing (2), an end cover (3), a shaft sleeve (4), a bearing cover (5) and an elastic piece (6), wherein the rolling bearing (2) is arranged between the end cover (3) and the rotating shaft (1);
a mounting groove (7) is formed between the bearing cover (5) and the shaft sleeve (4), and the mounting groove (7) is back to the rolling bearing (2);
the elastic piece (6) is embedded into the mounting groove (7) and supports the bearing cover (5) and the shaft sleeve (4);
in the radial direction, a first gap is formed between the bearing cover (5) and the shaft sleeve (4);
the shaft sleeve (4) is in clearance fit with the rotating shaft (1);
the bearing cover (5) comprises a connecting part (501) connected with the shaft sleeve (4) and a mounting part (502) which is far away from the shaft sleeve (4) and connected with the end cover (3);
the thickness of the connecting part (501) is smaller than that of the mounting part (502);
the connecting part (501) is connected with one side, close to the rolling bearing (2), of the mounting part (502).
2. The explosion-proof structure of the drum motor according to claim 1, wherein the mounting groove (7) is formed by the side wall of the mounting part (502), the side wall of the connecting part (501) and the side wall of the shaft sleeve (4) together.
3. The explosion-proof structure of the roller motor according to claim 2, wherein a first concave part (401), a convex part (402) and a second concave part (403) are sequentially arranged on one side of the shaft sleeve (4) far away from the rotating shaft (1) along the direction far away from the rolling bearing (2);
the first gap is arranged between the first concave part (401) and the end face of the connecting part (501);
the side wall of the convex part (402) adjacent to the first concave part (401) is abutted with the side wall of the connecting part (501).
4. The explosion-proof structure of the roller motor according to claim 3, wherein one end of the elastic member (6) is connected with the second concave part (403), and the other end is connected with the mounting part (502).
5. The explosion-proof structure of the drum motor according to claim 4, wherein a first positioning groove (5021) is arranged on one side of the side wall of the mounting part (502) far away from the connecting part (501);
a second positioning groove (4031) is formed in one side, away from the protruding portion (402), of the second concave portion (403);
one end of the elastic piece (6) is fixed in the first positioning groove (5021), the other end of the elastic piece is fixed in the second positioning groove (4031), and the elastic piece (6) is integrally embedded into the mounting groove (7).
6. The explosion-proof structure of the drum motor according to claim 5, wherein the elastic member (6) is a corrugated ring.
7. The explosion-proof structure of the drum motor according to claim 6, wherein the distance between the vertex of the corrugated ring adjacent to the connecting part (501) and the side wall of the connecting part (501) is 0.5-1 mm.
8. The explosion-proof structure of the roller motor according to claim 1, wherein the width of the first gap is 2.5-3 mm.
9. The explosion-proof structure of the drum motor according to claim 1, wherein the width of the gap between the shaft sleeve (4) and the rotating shaft (1) is 0.15-0.3 mm.
10. The explosion-proof structure of the roller motor according to claim 1, wherein the material of the shaft sleeve (4) is tin bronze powder metallurgy material, and an oil-containing structure for self-lubrication is arranged on the material.
11. The explosion-proof structure of the drum motor according to any one of claims 1 to 10, wherein the surface of the rotating shaft (1) correspondingly matched with the shaft sleeve (4) is subjected to hardening and polishing treatment, and the surface roughness Ra is less than 0.4.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010853682.6A CN111711306B (en) | 2020-08-24 | 2020-08-24 | Explosion-proof structure of drum motor |
| PCT/CN2020/127652 WO2022041487A1 (en) | 2020-08-24 | 2020-11-10 | Explosion-proof structure of drum motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010853682.6A CN111711306B (en) | 2020-08-24 | 2020-08-24 | Explosion-proof structure of drum motor |
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| Publication Number | Publication Date |
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| CN111711306A CN111711306A (en) | 2020-09-25 |
| CN111711306B true CN111711306B (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010853682.6A Active CN111711306B (en) | 2020-08-24 | 2020-08-24 | Explosion-proof structure of drum motor |
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| CN (1) | CN111711306B (en) |
| WO (1) | WO2022041487A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111711306B (en) * | 2020-08-24 | 2020-11-10 | 江苏嘉轩智能工业科技股份有限公司 | Explosion-proof structure of drum motor |
| CN114649892B (en) * | 2022-05-23 | 2022-08-16 | 山西省机电设计研究院有限公司 | Motor with bearing disassembly assisting device |
| CN115158416B (en) * | 2022-07-21 | 2024-04-02 | 广州世晟环保节能科技有限公司 | New energy automobile battery retrieves transport mechanism |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2095915C1 (en) * | 1996-03-20 | 1997-11-10 | Вячеслав Антонович Макагон | Explosion-proof bearing housing of electric motor |
| CN201742208U (en) * | 2010-03-05 | 2011-02-09 | 大连天元电机股份有限公司 | Flame-proof structure of flameproof electric motor |
| KR20130137729A (en) * | 2012-06-08 | 2013-12-18 | 현대중공업 주식회사 | Structure for joining a shaft of flameproof motor |
| CN102780303B (en) * | 2012-07-27 | 2014-05-14 | 抚顺煤矿电机制造有限责任公司 | Motor shaft sealing structure with high protection grade |
| CN104158335A (en) * | 2014-08-18 | 2014-11-19 | 中达电机股份有限公司 | Explosion-proof-type motor seal structure for draw-out-type blower fan |
| CN106553433A (en) * | 2015-09-28 | 2017-04-05 | 天津市泽阳印务有限公司 | A kind of bearing arrangement on printer sheet transfer drum |
| CN207868910U (en) * | 2017-12-19 | 2018-09-14 | 卧龙电气集团股份有限公司 | The bearing blast resistance construction of composite anti-explosion type threephase asynchronous |
| CN207853619U (en) * | 2017-12-22 | 2018-09-11 | 绍兴市万鹏机电有限公司 | A kind of radiating explosion-proof motor |
| KR102023909B1 (en) * | 2018-01-31 | 2019-09-23 | 박경용 | An oil sealing apparatus |
| CN108506350A (en) * | 2018-03-27 | 2018-09-07 | 北京化工大学 | A kind of sealed bearing assembly and bearing housing |
| CN209844711U (en) * | 2019-07-05 | 2019-12-24 | 南阳防爆（苏州）特种装备有限公司 | Floating type explosion-proof structure for explosion-proof motor rolling bearing |
| CN111711306B (en) * | 2020-08-24 | 2020-11-10 | 江苏嘉轩智能工业科技股份有限公司 | Explosion-proof structure of drum motor |
-
2020
- 2020-08-24 CN CN202010853682.6A patent/CN111711306B/en active Active
- 2020-11-10 WO PCT/CN2020/127652 patent/WO2022041487A1/en active Application Filing
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| WO2022041487A1 (en) | 2022-03-03 |
| CN111711306A (en) | 2020-09-25 |
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