CN214429349U - Novel immersion oil type brushless direct current motor for fuel pump - Google Patents
Novel immersion oil type brushless direct current motor for fuel pump Download PDFInfo
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- CN214429349U CN214429349U CN202120748992.1U CN202120748992U CN214429349U CN 214429349 U CN214429349 U CN 214429349U CN 202120748992 U CN202120748992 U CN 202120748992U CN 214429349 U CN214429349 U CN 214429349U
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- fuel pump
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Abstract
The utility model relates to an oil immersion type brushless direct current motor for a novel fuel pump, which comprises a left barrel shell and a right barrel shell which are butted, wherein the inner end walls of the left barrel shell and the right barrel shell are provided with an axle post for installing a bearing, the right end of the right barrel shell is provided with a functional barrel shell so as to form a functional part installation cavity, the inner wall of the left barrel shell is provided with a stator formed by winding on an iron core, and the iron core is formed by laminating the iron core; the iron core is provided with a plurality of parallel channels at the circumferential position and parallel to the central shaft, and is provided with a plurality of radial channels along the radial direction, and the radial channels are communicated with the parallel channels; the radial channel is arranged along the bulge of the iron core pressing sheet, namely the radial channel penetrates through the winding part of the winding on the iron core; in the multi-radial channels, the cooling medium flows in opposite directions in adjacent radial channels, i.e., one flows in and one flows out. The utility model discloses the beneficial effect who reaches is: the cooling of the winding is sufficient, the cooling effect is good, the medium is fully utilized, and dust is not easy to accumulate.
Description
Technical Field
The utility model relates to a motor cooling technical field, especially novel immersion oil formula brushless DC motor for fuel pump.
Background
The common motor is usually formed by a shell and end covers at two ends, and functional components need to be led out by leads; this company has designed an oil immersion motor (patent number is CN 201821579893X), links to each other through two sections casings about, does benefit to and realizes the immersion oil cooling, has concentrated functional components and parts on the motor simultaneously, forms the integral type.
On the basis of the above patent, actual production has been carried out, and the temperature sensor has been installed inside behind the production process and has been carried out temperature measurement, and when the evaluation cooling, not the temperature of seeing after the cooling alone, but see under the cooling oil and not adding the cooling oil condition, the inside temperature variation condition of motor. It is found that the cooling effect is good under the condition of medium and low rotating speed, and the cooling effect is not particularly ideal under the condition of high rotating speed.
Under the condition of medium and low rotating speed, the cooling effect is good because the heat generated is not small, and the essential reason should be seen, the small heat can be taken away in time under the action of the cooling oil; under the condition of high rotating speed, only a part of heat is taken away, and a part of heat still remains and is gradually accumulated.
In the above patent, in order to realize the cooling of high rotational speed, improved design has been carried out, opens cooling channel at the left end shell, realizes cooling matter circulation, finds that the cooling effect is still unsatisfactory.
Through detailed analysis, the left end shell is provided with a cooling channel which is mainly used for cooling the wall and has effective cooling effect on the inside.
Because the inside of the motor generates heat mainly by the coil, the coil is required to be cooled sufficiently, and the design of a general cooling motor is difficult to cool at the winding bulge, and good sealing cannot be formed only because the winding bulge cannot be processed.
Based on the above problem, a novel immersion oil type brushless direct current motor for a fuel pump is designed, and the cooling effect is improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming, provide to winding department cooling abundant, the cooling effect good, the medium utilizes abundant, the difficult laying dust's novel fuel pump with immersion oil formula brushless DC motor.
The purpose of the utility model is realized through the following technical scheme: the oil immersion type brushless direct current motor for the novel fuel pump comprises a left barrel shell and a right barrel shell which are butted, wherein an axle post for mounting a bearing is arranged on the inner end wall of the left barrel shell and the right barrel shell, a functional barrel shell is arranged at the right end of the right barrel shell so as to form a functional part mounting cavity, a stator formed by winding the inner wall of the left barrel shell on an iron core is arranged, and the iron core is formed by laminating iron core pressing sheets;
the iron core is provided with a plurality of parallel channels at the circumferential position and parallel to the central shaft, and is provided with a plurality of radial channels along the radial direction, and the radial channels are communicated with the parallel channels;
the radial channel is arranged along the bulge of the iron core pressing sheet, namely the radial channel penetrates through the winding part of the winding on the iron core; in the multi-radial channels, the cooling medium flows in opposite directions in adjacent radial channels, i.e., one flows in and one flows out.
Further, in the plurality of radial passages, the flow rate of the radial passage for inflow is larger than that of the radial passage for outflow; and the right cylinder shell is provided with a one-way valve, and the one-way valve is opened when the pressure in the motor exceeds a set pressure. Facilitating the discharge of the medium at other positions.
Furthermore, the outlet of the radial channel is in a wide mouth shape which reduces the air pressure, and the wide mouth can carry out airflow flowing to the periphery; the section of the radial channel is in a long waist shape hole shape, and the wide mouth is matched with the radial channel.
Furthermore, a coaxial perforated blocking cylinder is arranged in the motor, the perforated blocking cylinder is arranged at a distance from the outlet of the radial channel, and the non-perforated position of the perforated blocking cylinder is opposite to the outlet of the radial channel; the outer wall of the blocking cylinder with the hole flows along a circular track, and the medium forms a spiral track between the protrusions of the adjacent iron cores. The medium is prevented from directly impacting the rotor; of course, according to actual conditions, the perforated blocking cylinder can be omitted.
Furthermore, a stopper is arranged in the functional cylinder shell, and the stopper and the inner wall of the functional cylinder shell fixedly clamp the functional part through an annular bulge; the right end face of the right cylinder shell is provided with a convex column, the stopper is provided with a corresponding concave groove, and the convex column and the concave groove are installed in a matched mode. The blocking element is arranged on the one hand to fix the functional element and on the other hand to avoid dust accumulation at the functional element.
Furthermore, a transverse through hole is formed in the blocking piece; the outer ring of the right end of the right barrel shell is also in a step shape, a thread groove is formed in the surface of the step, the sleeving surface of the functional barrel shell at the step is a smooth surface, and the thread groove forms a vent hole. Facilitating the heat dissipation in the functional cartridge case.
Furthermore, when the right cylinder shell is installed to form the motor, a blank cavity area is reserved inside the right cylinder shell, and the blank cavity areas are communicated through the one-way valve.
The utility model has the advantages of it is following:
(1) the radial through holes are formed in the winding-arranged bulges, and the adjacent parallel channels are arranged in and out, so that most of media flow in a ring shape along the winding position, and the concentrated cooling at the winding position is realized;
(2) the arrangement of the wide opening at the outlet of the radial channel leads the pressure of the medium to be changed when the medium flows out, thereby flowing in the circumferential direction, weakening the flowing amplitude of the medium to the stator and further being beneficial to annular flow; in order to avoid the impact of the medium on the stator, a blocking barrel with a hole is also arranged;
(3) the arrangement of the thread groove, the blocking piece and the transverse through hole at the functional cylinder shell enables a cavity for placing the functional piece to be communicated with the outside through the transverse through hole and the thread groove, so that heat dissipation is realized; when dust enters, the dust enters the threaded groove and then is located in a cavity formed by the blocking piece and the right cylinder shell, and the dust is not easy to accumulate at the functional piece.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the left cartridge shell;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
in the figure: 1-left cylinder shell, 2-right cylinder shell, 201-thread groove, 3-functional cylinder shell, 4-iron core, 5-parallel channel, 6-radial channel, 7-single valve, 8-perforated blocking cylinder, 9-blocking piece and 10-transverse through hole.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.
As shown in fig. 1 to fig. 3, the oil immersion type brushless dc motor for the novel fuel pump includes a left cylinder housing 1 and a right cylinder housing 2 which are butted with each other; the right end of the right barrel shell 2 is provided with a functional barrel shell 3, and functional parts are arranged in the functional barrel shell 3.
In this scheme, the mounting structure of rotor does: the left cylinder shell 1 and the right cylinder shell 2 are provided with shaft columns for mounting bearings on opposite end walls, the rotor is mounted in a matched mode through the bearings, and one end of the rotor extends out of the left end of the left cylinder shell 1.
The mounting structure of stator does: a stator formed by winding a winding on an iron core 4 is arranged on the inner wall of the left barrel shell 1, and the iron core 4 is formed by iron core pressing sheets in a laminated mode. I.e. the relative rotation of the stator and rotor in the motor is in the left cartridge 1 and there is a larger empty cavity area in the right cartridge 2.
The heat inside the motor is mostly the heat generated by the winding and the eddy current formed by the iron core 4; although the core segments can reduce eddy currents to some extent, they are still unavoidable. The scheme is different from the traditional cooling mode and mainly cools the winding.
Specifically, as shown in fig. 2, on the iron core 4, a plurality of parallel passages 5 are opened in parallel with the central axis at the circumferential position, and a plurality of radial passages 6 are opened in the radial direction, the radial passages 6 being communicated with the parallel passages 5; and the radial channels 6 are opened along the protrusions of the core segments, i.e. the radial channels 6 are passed through the winding part of the winding on the core 4. That is, the protrusions of the core sheets at the winding position of the winding are specially cooled, which is not available in the traditional cooling.
In the process of cooling the medium, a common cooling mode is usually advanced to other cavity positions of the motor, but actually the hottest is the winding position, and the scheme enables the medium to move along the winding in a circular track. The structure is as follows: in the multi-radial channels 6, the cooling medium flows in opposite directions in adjacent radial channels 6, i.e. one flows in and one flows out; the inflowing medium flows directly out of the adjacent radial channels 6, during which flow the windings between the two adjacent radial channels 6 are sufficiently cooled.
In order to make the medium flow in the annular direction as much as possible, in the present embodiment, as shown in fig. 3, the outlet of the radial passage 6 is designed to be wide, and when the medium flows from the radial passage 6 to the wide opening, the pressure is reduced due to the increased volume, so that the medium flows around in a large amount. In the scheme, the section of the radial channel 6 is in a long waist shape, and the wide opening is matched with the long waist shape.
Under normal conditions, due to the existence of the rotor, the medium can directly contact with the rotor (namely impact is generated on the rotor) after flowing out of the radial channel 6, the rotor can drive the part of the medium to rotate, and under the action of centrifugal force, the medium reaches the winding position again, and cooling can be realized.
However, in some cases, the direct impact of the medium may hinder the rotation of the rotor to a certain extent, so as to avoid the direct impact of the medium on the rotor, and therefore, optionally, a coaxial perforated blocking cylinder 8 is arranged in the motor, the perforated blocking cylinder 8 is arranged at a distance from the outlet of the radial channel 6, and the non-perforated position of the perforated blocking cylinder is opposite to the outlet of the radial channel 6; the media is allowed to impact the perforated baffle 8 and then contact the rotor through the holes in the barrel. And the arrangement of the perforated blocking cylinder 8 can lead the medium to form a spiral track between the bulges of the adjacent iron cores 4.
In the scheme, since the medium mainly flows along the circular track at the outer wall of the perforated baffle cylinder 8, the medium at other positions is filled but flows less. Although this approach facilitates cooling at the windings, it is possible to have some flow of the medium in order to avoid other locations; therefore, in the plurality of radial passages 6, the flow rate of the radial passage 6 for inflow is larger than that of the radial passage 6 for outflow, and the check valve 7 is mounted on the right cylinder case 2, and when the pressure in the motor exceeds the set pressure, the check valve 7 is opened to realize the flow of the medium at other positions.
As shown in fig. 1, the right end face of the right barrel casing 2 is stepped at the outer ring, and a convex column is arranged at the center of the right end face; function cartridge case 3 and right cartridge case 2 adaptation installation, the ladder face department of right cartridge case 2 is opened threaded groove 201, and function cartridge case 3 assembly department is the smooth surface, then threaded groove 201 forms the air vent of function cartridge case 3.
An annular step is also arranged in the functional cartridge shell 3, the annular step and the protruding column position the stopper 9 together, a placing cavity is formed between the stopper 9 and the end surface of the functional cartridge shell 3, and a functional part is placed in the placing cavity. The stopper 9 is provided with a transverse through hole so as to communicate the placing cavity with the outside through the thread groove 201. And the stopper 9 and the functional cartridge housing 3 hold the functional parts, which are placed in the mounting frame, by the corresponding annular projections.
Claims (7)
1. Novel immersion oil formula brushless DC motor for fuel pump, including left bobbin case (1) and right bobbin case (2) of butt joint, thereby have the jack post of installation bearing on the inside end wall between them, the right-hand member of right bobbin case (2) is installed function bobbin case (3) and is formed the function piece installation cavity, and left bobbin case (1) inner wall department has the stator that is formed on iron core (4) by the winding, and iron core (4) are formed by the iron core preforming and are folded its characterized in that:
the iron core (4) is provided with a plurality of parallel channels (5) at the circumferential position, parallel to the central axis, and a plurality of radial channels (6) along the radial direction, wherein the radial channels (6) are communicated with the parallel channels (5);
the radial channel (6) is arranged along the bulge of the iron core pressing sheet, namely the radial channel (6) penetrates through the winding part of the winding on the iron core (4);
in a plurality of radial channels (6), the cooling medium flows in opposite directions in adjacent radial channels (6), namely flows into one radial channel and flows out of the other radial channel.
2. The oil-immersed brushless direct-current motor for the novel fuel pump according to claim 1, characterized in that: the flow rate of the radial channel (6) used for flowing in is larger than that of the radial channel (6) used for flowing out in the plurality of radial channels (6);
and a one-way valve (7) is mounted on the right cylinder shell (2), and the one-way valve (7) is opened when the pressure in the motor exceeds the set pressure.
3. The oil-immersed brushless direct-current motor for the novel fuel pump according to claim 2, characterized in that: the outlet of the radial channel (6) is in a wide mouth shape which reduces the air pressure, and the wide mouth can carry airflow flowing to the periphery;
the section of the radial channel (6) is in a long waist shape, and the wide mouth is matched with the radial channel.
4. The oil-immersed brushless direct-current motor for the novel fuel pump according to claim 3, characterized in that: a coaxial perforated blocking cylinder (8) is arranged in the motor, the perforated blocking cylinder (8) is arranged at a distance from the outlet of the radial channel (6), and the non-perforated position of the perforated blocking cylinder is opposite to the outlet of the radial channel (6);
the perforated blocking cylinder (8) enables the medium to flow along a circular track at the outer wall of the perforated blocking cylinder (8), and enables the medium to form a spiral track between the protrusions of the adjacent iron cores (4).
5. The oil-immersed brushless direct-current motor for the novel fuel pump according to claim 3 or 4, characterized in that: a stopper (9) is arranged in the functional cylinder shell (3), and the stopper (9) and the inner wall of the functional cylinder shell (3) fixedly clamp the functional part through an annular bulge;
the right end face of the right cylinder shell (2) is provided with a convex column, the stopper (9) is provided with a corresponding concave groove, and the convex column and the concave groove are installed in a matched mode.
6. The oil-immersed brushless direct-current motor for the novel fuel pump according to claim 5, characterized in that: the blocking piece (9) is provided with a transverse through hole (10);
the right end outer ring of the right barrel shell (2) is also in a step shape, a thread groove (201) is formed in the surface of the step, the functional barrel shell (3) is sleeved at the step, the sleeved surface of the functional barrel shell is a smooth surface, and a vent hole is formed in the thread groove (201).
7. The oil-immersed brushless direct-current motor for the novel fuel pump according to claim 1, characterized in that: when the right cylinder shell (2) is installed to form a motor, a blank cavity area is reserved inside the right cylinder shell, and the blank cavity areas are communicated through the one-way valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120748992.1U CN214429349U (en) | 2021-04-13 | 2021-04-13 | Novel immersion oil type brushless direct current motor for fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120748992.1U CN214429349U (en) | 2021-04-13 | 2021-04-13 | Novel immersion oil type brushless direct current motor for fuel pump |
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| Publication Number | Publication Date |
|---|---|
| CN214429349U true CN214429349U (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120748992.1U Active CN214429349U (en) | 2021-04-13 | 2021-04-13 | Novel immersion oil type brushless direct current motor for fuel pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337060A (en) * | 2021-12-28 | 2022-04-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Aviation fuel pump driving motor based on safety design |
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2021
- 2021-04-13 CN CN202120748992.1U patent/CN214429349U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337060A (en) * | 2021-12-28 | 2022-04-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Aviation fuel pump driving motor based on safety design |
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