CN211958914U - High protection level permanent magnet direct current motor - Google Patents
High protection level permanent magnet direct current motor Download PDFInfo
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- CN211958914U CN211958914U CN202020527400.9U CN202020527400U CN211958914U CN 211958914 U CN211958914 U CN 211958914U CN 202020527400 U CN202020527400 U CN 202020527400U CN 211958914 U CN211958914 U CN 211958914U
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- end cover
- rear end
- permanent magnet
- direct current
- sealing ring
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Abstract
The utility model discloses a high protection level permanent magnet direct current motor, which comprises a motor main body, a first sealing ring, a second sealing ring, a third sealing ring and a framework oil seal; the motor main body comprises a rear end cover, a middle shell, a front end cover, a rotor and an assembling screw, wherein the rotor extends out of the rotating shaft from the front end cover, and the rear end cover, the middle shell and the front end cover are fixedly connected through the assembling screw; the first sealing ring is arranged at the joint of the assembling screw and the rear end cover; the second sealing ring is arranged at the joint of the rear end cover and the middle shell; the third sealing ring is arranged at the joint of the middle shell and the front end cover; the framework oil seal is arranged in the rotating shaft seal groove of the front end cover and abuts against the side wall of the rotating shaft; the junction of assembly screw and rear end housing, the junction of rear end housing and mesochite, the junction of mesochite and front end housing and the exit of front end housing all have better leakproofness to guarantee that the leakproofness of whole motor is good, have higher protection level.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to high protection level permanent magnet direct current motor.
Background
The fire safety is very important regardless of foreign countries or domestic countries, which is the respect to the life and property safety of people and is the basic guarantee of the people's peace and happiness industry. Therefore, the development of light, efficient and high-protection-grade fire pumps is a necessary trend. The fire pump adopts a permanent magnet direct current motor, and has the characteristics of portability, small volume, high output power, controllable rotating speed, flexible installation position and the like compared with the traditional asynchronous motor. Therefore, the sealing performance and the protection level of the permanent magnet direct current motor are very important.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a high protection level permanent magnet direct current motor, the leakproofness is good, has higher protection level.
The embodiment of the utility model provides a high protection level permanent magnet direct current motor, include:
the motor comprises a motor main body, a motor main body and a motor main body, wherein the motor main body comprises a rear end cover, a middle shell, a front end cover, a rotor and an assembling screw, the rotor is arranged in the middle shell and extends out of a rotating shaft from the front end cover, the front end cover is provided with a threaded hole matched with the assembling screw, the threaded hole is a blind hole, and the assembling screw penetrates through the rear end cover and the middle shell to fixedly connect the rear end cover, the middle shell and the front end cover;
the first sealing ring is arranged at the joint of the assembling screw and the rear end cover;
the second sealing ring is arranged at the joint of the rear end cover and the middle shell;
the third sealing ring is arranged at the joint of the middle shell and the front end cover;
the framework oil seal is arranged on the front end cover and used for supplying an outlet from which the rotating shaft extends, a rotating shaft sealing groove is formed in the outlet, and the framework oil seal is arranged in the rotating shaft sealing groove and abuts against the side wall of the rotating shaft.
According to the utility model discloses high protection level permanent magnet direct current motor has following beneficial effect at least: through setting up first sealing washer, second sealing washer, third sealing washer and skeleton oil blanket for the junction of assembly screw and rear end cap, the junction of rear end cap and mesochite, the junction of mesochite and front end housing and the exit of front end housing all have better leakproofness, thereby guarantee that the leakproofness of whole motor is good, have higher protection level.
According to some embodiments of the utility model, the rear end cap supplies assembly screw penetrates the department and is provided with first recess, first sealing washer sets up in the first recess. The first sealing ring is convenient to position by arranging the first groove on the rear end cover, and the first sealing ring is prevented from loosening and misplacing during installation.
According to some embodiments of the utility model, the rear end cap with the junction of mesochite is provided with the second recess, the second sealing washer sets up in the second recess. The second groove is formed in the rear end cover, so that the second sealing ring is convenient to position, and looseness and dislocation of the second sealing ring during installation are avoided.
According to some embodiments of the utility model, the front end housing with the junction of mesochite is provided with the third recess, the third sealing washer sets up in the third recess. The third groove is formed in the front end cover, so that the third sealing ring can be positioned conveniently, and looseness and dislocation of the third sealing ring during installation are avoided.
According to some embodiments of the utility model, the skeleton oil blanket is fluororubber skeleton oil blanket. The fluororubber framework oil seal has excellent performance and can effectively prevent the infiltration damage of chemical corrosion to the inside of the motor.
According to some embodiments of the utility model, the front end housing is provided with the front bearing, the rear end housing is provided with the rear bearing, install the rear end of pivot in the rear bearing, the front end of pivot is passed the front bearing is followed the front end housing stretches out.
According to some embodiments of the utility model, correspond in the pivot the diameter of the part of skeleton oil blanket is less than the diameter of the part that corresponds front bearing. Make skeleton oil blanket and the sealed complex part of pivot adopt independent one-level axle, the roughness on this partial surface of pivot can not destroyed in the assembly of pivot and front bearing for pivot and skeleton oil blanket reach better smooth rotary seal effect.
According to some embodiments of the invention, the compression ratio of the first, second and third sealing rings is between 28% and 45%; the compression rate of the framework oil seal is between 5% and 11%. The compression rates of the first sealing ring, the second sealing ring and the third sealing ring are between 28% and 45% by reasonably setting the sizes and the groove types of the first groove, the second groove and the third groove, so that a better sealing effect is achieved; through the size and the cell type of rationally setting up the pivot seal groove, and the size of rational design skeleton oil blanket for the compression ratio of skeleton oil blanket is between 5% to 11%, thereby reaches better sealed effect.
According to the utility model discloses a some embodiments, be provided with the power outlet on the rear end cap, the power outlet outside is provided with the silicon rubber sealing plug, the power outlet inboard is packaged with sealing resin. The power outlet of the motor can be tightly sealed.
According to some embodiments of the invention, the outer surface of the motor body is sprayed with a protective coating. Thereby improving the protection effect of the motor.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic structural diagram of a high protection level permanent magnet dc motor according to an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is an enlarged view of FIG. 1 at B;
FIG. 4 is an enlarged view at C of FIG. 1;
fig. 5 is a schematic diagram of an outer side of a rear end cover of a high protection level permanent magnet dc motor according to an embodiment of the present invention;
fig. 6 is an inside schematic view of a rear end cover of a high protection level permanent magnet dc motor according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 4, an embodiment of the present invention provides a high protection level permanent magnet dc motor, including:
the motor body 100 comprises a rear end cover 110, a middle shell 120, a front end cover 130, a rotor 140 and an assembly screw 150, wherein the rotor 140 is arranged inside the middle shell 120 and extends out of a rotating shaft 141 from the front end cover 130, the front end cover 130 is provided with a threaded hole matched with the assembly screw 150, the threaded hole is a blind hole, and the assembly screw 150 penetrates through the rear end cover 110 and the middle shell 120 to fixedly connect the rear end cover 110, the middle shell 120 and the front end cover 130;
a first packing 200 provided at a junction of the assembly screw 150 and the rear cap 110;
a second packing 300 provided at a junction of the rear cap 110 and the middle case 120;
a third packing 400 provided at a junction of the middle case 120 and the front cap 130;
the framework oil seal 500 is provided with an outlet for the rotating shaft 141 to extend out from the front end cover 130, a rotating shaft sealing groove is arranged at the outlet, and the framework oil seal 500 is arranged in the rotating shaft sealing groove and abuts against the side wall of the rotating shaft 141.
According to the utility model discloses a high protection level permanent magnet direct current motor, through setting up first sealing washer 200, second sealing washer 300, third sealing washer 400 and skeleton oil blanket 500 for assembly screw 150 all has better leakproofness with rear end cap 110's junction, rear end cap 110 and mesochite 120's junction, mesochite 120 and front end housing 130's junction and front end housing 130's exit, thereby guarantee that the leakproofness of whole motor is good, have higher protection level.
Referring to fig. 2, in some embodiments of the present invention, a first groove is provided at a position where the mounting screw 150 penetrates the rear end cap 110, and the first sealing ring 200 is disposed in the first groove. The first groove is formed in the rear end cap 110, so that the first sealing ring 200 can be positioned conveniently, and the first sealing ring 200 is prevented from being loosened and dislocated during installation.
Referring to fig. 2, in some embodiments of the present invention, a second groove is provided at a junction of the rear end cap 110 and the middle shell 120, and the second sealing ring 300 is disposed in the second groove. The second groove is formed in the rear end cap 110, so that the second sealing ring 300 can be positioned conveniently, and the second sealing ring 300 is prevented from being loosened and dislocated during installation.
Referring to fig. 3, in some embodiments of the present invention, a third groove is provided at a junction of the front end cap 130 and the middle shell 120, and a third sealing ring 400 is disposed in the third groove. The third groove is formed in the front end cover, so that the third sealing ring 400 can be positioned conveniently, and looseness and dislocation of the third sealing ring 300 during installation are avoided.
Among them, in some embodiments of the present invention, the frame oil seal 500 is a fluororubber frame oil seal. The fluororubber framework oil seal has excellent performance and can effectively prevent the infiltration damage of chemical corrosion to the inside of the motor.
Referring to fig. 1, in some embodiments of the present invention, the front end cap 130 is provided with a front bearing 131, the rear end cap 110 is provided with a rear bearing 111, the rear end of the rotating shaft 141 is installed in the rear bearing 111, and the front end of the rotating shaft 141 passes through the front bearing 131 and extends out of the front end cap 130.
Referring to fig. 4, in some embodiments of the present invention, the diameter of the portion of the rotating shaft 141 corresponding to the frame oil seal 500 is smaller than the diameter of the portion corresponding to the front bearing 131. The part of the framework oil seal 500 and the rotating shaft 141 which are in sealing fit adopts an independent primary shaft, and the assembly of the rotating shaft 141 and the front bearing 131 cannot damage the roughness of the surface of the part of the rotating shaft, so that the rotating shaft 141 and the framework oil seal 500 achieve a good smooth rotary sealing effect.
Wherein, in some embodiments of the present invention, the compression ratio of the first sealing ring 200, the second sealing ring 300 and the third sealing ring 400 is between 28% and 45%; the compression ratio of the frame oil seal 500 is between 5% and 11%. By reasonably setting the sizes and the groove types of the first groove, the second groove and the third groove, the compression rates of the first sealing ring 200, the second sealing ring 300 and the third sealing ring 400 are between 28% and 45%, so that a better sealing effect is achieved; through the size and the cell type of rationally setting up the pivot seal groove, and the size of rational design skeleton oil blanket 500 for the compression ratio of skeleton oil blanket 500 is between 5% to 11%, thereby reaches better sealed effect.
Referring to fig. 5 and 6, in some embodiments of the present invention, a power outlet is disposed on the rear end cover 110, a silicone rubber sealing plug 112 is disposed outside the power outlet, and a sealing resin 113 is encapsulated inside the power outlet. The power outlet of the motor can be tightly sealed.
In addition, on the basis of the sealing structure, the motor front end cover 130, the rear end cover 110 and the gear pump body 600 which are made of aluminum alloy through die casting need to be subjected to vacuum infiltration treatment before installation so as to block and seal fine air holes; the middle shell 120 is made of a precision seamless steel tube to ensure sealing. And finally, after the whole motor is installed, the whole outer surface is subjected to treatment of spraying the protective coating, so that the whole product finally realizes high protection grade.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art.
Claims (10)
1. A high protection level permanent magnet direct current motor, characterized by includes:
the motor comprises a motor main body, a motor main body and a motor main body, wherein the motor main body comprises a rear end cover, a middle shell, a front end cover, a rotor and an assembling screw, the rotor is arranged in the middle shell and extends out of a rotating shaft from the front end cover, the front end cover is provided with a threaded hole matched with the assembling screw, the threaded hole is a blind hole, and the assembling screw penetrates through the rear end cover and the middle shell to fixedly connect the rear end cover, the middle shell and the front end cover;
the first sealing ring is arranged at the joint of the assembling screw and the rear end cover;
the second sealing ring is arranged at the joint of the rear end cover and the middle shell;
the third sealing ring is arranged at the joint of the middle shell and the front end cover;
the framework oil seal is arranged on the front end cover and used for supplying an outlet from which the rotating shaft extends, a rotating shaft sealing groove is formed in the outlet, and the framework oil seal is arranged in the rotating shaft sealing groove and abuts against the side wall of the rotating shaft.
2. The high-protection-level permanent magnet direct current motor according to claim 1, wherein a first groove is formed in a position, where the assembling screw penetrates, of the rear end cover, and the first sealing ring is arranged in the first groove.
3. The high-protection-level permanent magnet direct current motor according to claim 1, wherein a second groove is formed at the joint of the rear end cover and the middle shell, and the second sealing ring is arranged in the second groove.
4. The high-protection-level permanent magnet direct current motor according to claim 1, wherein a third groove is formed at a joint of the front end cover and the middle shell, and the third sealing ring is arranged in the third groove.
5. The high protection level permanent magnet direct current motor according to claim 1, wherein the framework oil seal is a fluororubber framework oil seal.
6. The high protection level permanent magnet direct current motor according to claim 1, wherein the front end cover is provided with a front bearing, the rear end cover is provided with a rear bearing, the rear end of the rotating shaft is installed in the rear bearing, and the front end of the rotating shaft passes through the front bearing and extends out of the front end cover.
7. The high-protection-level permanent magnet direct current motor according to claim 6, wherein the diameter of the part, corresponding to the framework oil seal, of the rotating shaft is smaller than that of the part, corresponding to the front bearing.
8. The high protection level permanent magnet direct current motor according to claim 1, wherein the compression rate of the first seal ring, the second seal ring and the third seal ring is between 28% and 45%; the compression rate of the framework oil seal is between 5% and 11%.
9. The high-protection-level permanent magnet direct current motor according to claim 1, wherein a power outlet is arranged on the rear end cover, a silicon rubber sealing plug is arranged on the outer side of the power outlet, and sealing resin is encapsulated on the inner side of the power outlet.
10. The high protection level permanent magnet direct current motor according to claim 1, wherein the outer surface of the motor body is sprayed with a protective coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020527400.9U CN211958914U (en) | 2020-04-10 | 2020-04-10 | High protection level permanent magnet direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020527400.9U CN211958914U (en) | 2020-04-10 | 2020-04-10 | High protection level permanent magnet direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211958914U true CN211958914U (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020527400.9U Active CN211958914U (en) | 2020-04-10 | 2020-04-10 | High protection level permanent magnet direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211958914U (en) |
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2020
- 2020-04-10 CN CN202020527400.9U patent/CN211958914U/en active Active
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