CN216873021U - Structure for reducing temperature rise of submersible motor rotor by adopting oblique heat conducting grooves - Google Patents
Structure for reducing temperature rise of submersible motor rotor by adopting oblique heat conducting grooves Download PDFInfo
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- CN216873021U CN216873021U CN202220669436.XU CN202220669436U CN216873021U CN 216873021 U CN216873021 U CN 216873021U CN 202220669436 U CN202220669436 U CN 202220669436U CN 216873021 U CN216873021 U CN 216873021U
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Abstract
The utility model discloses a structure for reducing temperature rise of a submersible motor rotor by adopting an inclined heat conducting groove.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a structure for reducing temperature rise of a submersible motor rotor by adopting inclined heat conducting grooves.
Background
The electric energy production, transmission and use are continuously developed, and the motor occupies an important position in various industries and departments in the modern society. The submersible motor is a motor specially developed for underwater use, is directly connected with a pump, and operates in water. The motor is matched with various submersible pumps, is integrated with the pumps, and can be submerged into sewage with various water qualities for a long time to run, thereby playing a role in rescue and relief. Taking the lake water disaster of the nest in 2020 as an example, under the state of ultrahigh water level, the submersible motor plays a great role in the process of controlling the lake water disaster due to the use and the positioning of the submersible motor. The submersible motor is used as an electromechanical energy conversion mechanism, loss is inevitably generated in the electromechanical energy conversion process, most of the loss is finally changed into heat, the temperature of each part of the motor is increased, the temperature rise of the motor is related to the insulation of the motor, the service life of the motor and part of the working performance, and therefore the submersible motor temperature rise is effectively reduced, and the submersible motor has important significance for improving the durability and the working benefit of the motor.
From literature search, at present, relatively few researches on reducing the temperature rise of the submersible motor are carried out, wherein Zhang bin doctor of China university of mining (Beijing) researches the related problems of the temperature rise of the submersible motor under different water flow speeds, Badao Hua professor of the university of fertilizer industry proposes an improved stator pressing plate to reduce the end loss and the temperature rise structure, and the full navy of the university of fertilizer industry carries out related researches on water abrasion of the wet submersible motor so as to partially analyze the temperature rise condition.
The above and related similar researches are all to analyze the flow speed of the fluid and the related influence caused by the fluid or add a new mechanical structure to achieve the purpose of reducing the temperature rise of the motor, neglect from the perspective of the heat dissipation coefficient, equivalently increase the heat dissipation coefficient by the change of the structure, and achieve the purpose of reducing the temperature rise of the motor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at just lies in order to solve above-mentioned problem, under the background of present mainstream through adjustment motor mechanical structure and relevant electromagnetism scheme, the structure that adopts oblique heat-conducting groove to reduce dive electric motor rotor temperature rise has been proposed, the notion of the current rotor axial chute of footing, the feasibility on the machine-building of fully considering, the fluidic flow characteristic of heat-conducting groove when through further disturbing the dive motor operation, the equivalence improves fluid and dive electric motor rotor conduction radiating equivalent coefficient, and then reach and reduce equivalent thermal resistance and electric motor rotor temperature rise, improve temperature distribution's effect, improve the life of insulating and motor.
The utility model achieves the above purpose through the following technical scheme:
the utility model provides an adopt structure that oblique heat conduction groove reduces dive motor rotor temperature rise, the dive motor of this structure adaptation can be for wash water formula, oil charge formula and three kinds of dry-type, and this structure includes rotor, pivot and conducting bar, wherein:
the rotor is coaxially fixed on the rotating shaft as in the prior art;
the rotor is provided with a plurality of rotor grooves which are distributed along the circumferential direction of the rotor, and each rotor groove is internally provided with a guide bar;
the rotor is also provided with a plurality of heat conducting chutes which are inclined relative to the axis of the rotor and are uniformly distributed along the circumferential direction of the rotor.
As a further preferred solution of the utility model, the rotor slots are oblique slots inclined with respect to the rotor axis.
In order to further increase the cooling effect, as a further optimized scheme of the utility model, the inclination angle of the heat-conducting chute relative to the rotor axis is the same as the inclination angle of the rotor groove relative to the rotor axis.
In order to further increase the cooling effect, as a further optimized scheme of the utility model, the heat-conducting chute is close to the axis of the rotor relative to the rotor groove.
In order to further increase the cooling effect, as a further optimized scheme of the utility model, the cross section of the heat-conducting chute is circular.
In order to further increase the cooling effect, as a further optimized scheme of the utility model, the cross section area of the heat-conducting chute is larger than that of the rotor groove.
In order to facilitate the processing of the rotor and the processing of the heat conduction chute structure, as a further optimized scheme of the utility model, the rotor is formed by laminating a plurality of silicon steel sheet iron cores, the rotor heat conduction through holes are punched on the silicon steel sheet iron cores, and the plurality of heat conduction through holes are communicated to form the heat conduction chute after the plurality of silicon steel sheet iron cores are laminated.
As a further optimized scheme of the utility model, a flowing cooling medium is arranged in the heat-conducting chute.
In some embodiments, the cooling medium is water, air or oil, and the flowing water, air or oil is more beneficial to cooling the motor rotor.
The conducting bars are made of aluminum or copper, as in the prior art.
According to the internal heat theory of the motor, when the motor runs, the loss is generated, most of the loss is dissipated in the form of heat, and the temperature of each part of the motor is increased. By combining with the related theory of calculating the temperature rise by the equivalent thermal circuit method, when the loss, namely the heat generated by the motor is constant, namely the heat flow is constant, if the thermal resistance can be effectively reduced, the temperature rise of the motor can be reduced. Wherein the thermal resistance includes conductive thermal resistance and convective thermal resistance. According to the Newton's heat dissipation law, wherein the heat flux density is the heat dissipation coefficient, the inclined heat conduction groove is adopted to effectively contact the contact level of the fluid and the heat conduction groove, so that the purposes of equivalently improving the blowing efficiency coefficient of the fluid, improving the heat dissipation coefficient and reducing the convective resistance are achieved, the temperature rise of each part of the submersible motor during operation is effectively reduced, the insulation and the service life of the motor are improved, and the related working performance of the motor is improved.
The utility model creatively aims at improving the heat dissipation coefficient, creatively provides a structure for reducing the temperature rise of a rotor of the submersible motor by adopting the inclined heat conduction groove on the basis of the traditional straight heat conduction groove on the basis of the feasible mechanical process on the basis of the conventional rotor axial inclined groove by starting from the adjustment of a mechanical structure, further disturbs the motion mode of fluid in the heat conduction groove when the submersible motor runs, equivalently improves the heat conduction coefficients of the surface of the fluid and the surface of the rotor, achieves the purposes of reducing equivalent thermal resistance and the temperature rise of the rotor of the motor and improving the temperature distribution of the rotor, effectively prolongs the insulation of the submersible motor and the service life of the motor, and improves the related working performance. Simultaneously, to the direct heat conduction groove structure of tradition, if the dive electric motor rotor adopts the chute rotor, will increase the complexity of processing, and adopt the heat conduction groove structure to one side, can accomplish the structure of heat conduction groove structure to one side when realizing the chute rotor, it is more convenient to process.
The utility model has the beneficial effects that:
1) the flow of the fluid in the water channel is further disturbed, so that the heat dissipation coefficients of the water channel of the motor rotor and the fluid are equivalently improved, and the effects of reducing the temperature rise of the submersible motor rotor and improving the temperature distribution of the submersible motor rotor are achieved;
2) the oblique air duct structure provided based on the concept of the existing rotor axial oblique slot ensures the feasibility of a mechanical manufacturing process, can be further used in a motor with an oblique slot rotor structure, reduces the temperature rise of a motor rotor while the rotor oblique slot has excellent performance, and reduces the complexity of the process relative to the use of the structure in a straight slot;
3) the utility model provides a structure for reducing the temperature rise of a submersible motor rotor by adopting an inclined heat conduction groove.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram illustrating the temperature of the fluid flowing through the heat-conducting chute during normal operation of the present invention;
FIG. 3 is a schematic view of a rotor part temperature rise simulation result of a submersible motor, namely a 45-degree axial measurement view on one end face, when a straight heat-conducting groove is adopted;
FIG. 4 is a schematic view of a rotor part temperature rise simulation result of the submersible motor on another end surface of a 45-degree shaft when a straight heat-conducting groove is adopted;
FIG. 5 is a schematic view of a 45-degree axial measurement of one end surface of a simulation result of temperature rise of a rotor part of the submersible motor when an inclined heat-conducting groove is adopted;
FIG. 6 is a schematic view of another end face 45 degree axis of a simulation result of temperature rise of a rotor part of the submersible motor when an inclined heat conducting groove is adopted.
Reference numbers in the figures: 1 rotating shaft, 2 rotors, 3 guide bars, 20 rotor slots and 21 hot inclined slots.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The structure that adopts oblique heat conduction groove to reduce submersible motor rotor temperature rise as shown in fig. 1 includes rotor 2, pivot 1 and conducting bar 3, wherein:
the rotor 2 is coaxially fixed on the rotating shaft 1, a rotor groove 20 is formed in the rotor 2, the conducting bars 3 are arranged in the rotor groove 20, the rotor groove 20 is provided with a plurality of rotor grooves 20, the plurality of rotor grooves 20 are distributed along the circumferential direction of the rotor 2, the conducting bars 3 are arranged in each rotor groove 20, and the conducting bars 3 are made of aluminum materials;
specifically, the rotor groove 20 is an inclined groove inclined relative to the axis of the rotor 2;
the rotor 2 is also provided with a heat conduction chute 21, the heat conduction chute 21 inclines relative to the axis of the rotor 2, the inclination angle of the heat conduction chute 21 relative to the axis of the rotor 2 is the same as the inclination angle of the rotor groove 20 relative to the axis of the rotor 2, and the heat conduction chute 21 is close to the axis of the rotor 2 relative to the rotor groove 20;
specifically, the cross section of the heat conducting chute 21 is circular, and the cross section area of the heat conducting chute 21 is larger than that of the rotor slot 20;
a flowing cooling medium is arranged in the heat conduction chute 21, and the cooling medium is water;
the heat conduction grooves are arranged in plurality and are uniformly distributed along the circumferential direction of the rotor 2;
as shown in fig. 2, the horizontal arrow indicates the flow direction of the medium in the heat conducting chute 21, and the arrow pointing to the heat conducting chute 21 from the conducting bar 3 and the rotating shaft 1 in fig. 2 indicates that the temperature of the conducting bar and the rotating shaft is conducted to the medium in the heat conducting chute 2, thereby facilitating the cooling of the motor;
in order to facilitate the processing of the rotor 2, and be convenient for the processing of the heat conduction chute 21 structure, the rotor 2 is made for laminating of polylith silicon steel sheet iron core, punch out the heat conduction through-hole of rotor 2 on the silicon steel sheet iron core, a plurality of heat conduction through-holes intercommunication form heat conduction chute 21 after a plurality of silicon steel sheet iron cores are laminated, heat conduction chute 21 is the rotor 2 chute processing manufacturing approach among the prior art promptly, the diving electrical machine rotor 2 structure pressure equipment that will open the oblique heat conduction groove is accomplished, accomplish relevant dip coating, finish machining, burring etc. process, make the diving electrical machine rotor 2 structure that opens the oblique heat conduction groove, and cooperate with diving electrical machine pivot 12, constitute complete diving electrical machine structure.
A three-dimensional model is drawn by SolidWorks, an axial straight heat conducting groove and an inclined heat conducting groove which is inclined by 15 degrees along the radial direction are respectively constructed, finite element simulation software Fluent and Transient Thermal analysis is adopted to verify that the environment temperature is 20 ℃, a rotor iron core is set as a heat source, the value of the heat dissipation coefficient of the surface of the rotor iron core is equal to 16.7, the heat dissipation coefficient of the end part is 1.0, the simulation time is set for 100s, other physical parameters of the two structures are the same except that the inclination angles of the heat conducting grooves are different, and the simulation result is shown in figures 3-6. The discovery is after adopting oblique heat conduction groove, and rotor core highest temperature and minimum temperature all descend to some extent, and the same region of contrast temperature simultaneously adopts the scope of oblique heat conduction groove structure littleer, means that whole temperature distribution is the decline trend, helps rotor core's heat dissipation more.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides an adopt structure of oblique heat conduction groove reduction dive motor rotor temperature rise which characterized in that: including pivot, rotor and conducting bar, wherein:
the rotor is coaxially fixed on the rotating shaft;
the rotor is provided with a rotor groove, a guide bar is arranged in the rotor groove, and the rotor groove is provided with a plurality of rotor grooves which are distributed along the circumferential direction of the rotor;
still open the heat conduction chute on the rotor, the relative rotor axis slope of heat conduction chute, the heat conduction groove is equipped with a plurality ofly, and a plurality of heat conduction grooves distribute along rotor circumference.
2. The structure for reducing the temperature rise of the rotor of the submersible motor according to claim 1, wherein the rotor slot is an inclined slot inclined with respect to the axis of the rotor.
3. The structure for reducing the temperature rise of the rotor of the submersible motor according to claim 2, wherein the heat conducting chute is inclined at the same angle with respect to the rotor axis as the rotor groove.
4. The structure for reducing the temperature rise of the rotor of the submersible motor according to claim 1, wherein the heat conducting chute is located close to the axis of the rotor with respect to the rotor slot.
5. The structure for reducing the temperature rise of the rotor of the submersible motor by using the inclined heat conducting grooves as claimed in claim 1, wherein the cross section of the heat conducting inclined grooves is circular.
6. The structure for reducing the temperature rise of the rotor of the submersible motor according to claim 1, wherein the cross-sectional area of the heat-conducting chute is larger than the cross-sectional area of the rotor groove.
7. The structure for reducing the temperature rise of the rotor of the submersible motor by adopting the inclined heat-conducting grooves as claimed in claim 1, wherein the rotor is formed by laminating a plurality of silicon steel sheet iron cores.
8. The structure for reducing the temperature rise of the rotor of the submersible motor by using the inclined heat conducting grooves as claimed in claim 1, wherein a flowing cooling medium is arranged in the heat conducting inclined grooves.
9. The structure for reducing the temperature rise of the rotor of the submersible motor by adopting the inclined heat-conducting grooves as claimed in claim 8, wherein the cooling medium is water, air or oil.
10. The structure for reducing the temperature rise of the rotor of the submersible motor by using the inclined heat-conducting grooves as claimed in claim 1, wherein the conducting bars are made of aluminum or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220669436.XU CN216873021U (en) | 2022-03-25 | 2022-03-25 | Structure for reducing temperature rise of submersible motor rotor by adopting oblique heat conducting grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220669436.XU CN216873021U (en) | 2022-03-25 | 2022-03-25 | Structure for reducing temperature rise of submersible motor rotor by adopting oblique heat conducting grooves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216873021U true CN216873021U (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220669436.XU Active CN216873021U (en) | 2022-03-25 | 2022-03-25 | Structure for reducing temperature rise of submersible motor rotor by adopting oblique heat conducting grooves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216873021U (en) |
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2022
- 2022-03-25 CN CN202220669436.XU patent/CN216873021U/en active Active
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