CN111030344B - High-speed motor - Google Patents
High-speed motor Download PDFInfo
- Publication number
- CN111030344B CN111030344B CN201911101891.9A CN201911101891A CN111030344B CN 111030344 B CN111030344 B CN 111030344B CN 201911101891 A CN201911101891 A CN 201911101891A CN 111030344 B CN111030344 B CN 111030344B
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- Prior art keywords
- rotor
- groove
- air
- end cover
- guide channel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a high-speed motor, comprising: a stator and a rotor rotating relative to the stator; the rotor includes: the rotor comprises a rotor shaft, a rotor iron core, a commutator, an upper end cover and a lower end cover; the commutator, the upper end cover, the rotor core and the lower end cover are sequentially fixed to the rotor shaft; the upper end cover and the lower end cover are respectively attached to two ends of the rotor core; the rotor core is formed with a plurality of slots; the groove is internally provided with groove paper; the rotor iron core and the slot paper jointly form an air guide channel through which air flow can pass; the air guide channel extends from the upper end of the rotor core to the lower end of the rotor core and simultaneously extends along the opposite direction of the rotation direction of the rotor; the high-speed motor further includes: a centrifugal fan for generating a negative pressure downstream of the air-guide channel and a booster ring for forcing the air flow from outside the air-guide channel into upstream of the air-guide channel. The invention has the advantage of good heat dissipation effect.
Description
Technical Field
The present invention relates to a high-speed motor.
Background
And a fan is arranged on a rotor of the high-speed motor and used for dissipating heat of the rotor. The existing high-speed motor transfers airflow through a gap between a rotor and a stator, and the airflow is small in flow, so that the heat dissipation effect of the high-speed motor is poor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the high-speed motor with a good heat dissipation effect.
In order to achieve the above object, the present invention adopts the following technical solutions:
a high speed electric machine comprising: a stator and a rotor rotating relative to the stator; the stator surrounds the rotor; the stator includes: a stator core and a stator coil; the rotor includes: the rotor comprises a rotor shaft, a rotor iron core, a commutator, an upper end cover and a lower end cover; the commutator, the upper end cover, the rotor core and the lower end cover are sequentially fixed to the rotor shaft; the upper end cover and the lower end cover are respectively attached to two ends of the rotor core; the rotor core is formed with a plurality of slots; the groove is internally provided with groove paper; the rotor iron core and the slot paper jointly form an air guide channel through which air flow can pass; one end of the rotor core close to the upper end cover is defined as the upper end of the rotor core; one end of the rotor core close to the lower end cover is defined as the lower end of the rotor core; the air guide channel is inclined to the rotation axis of the rotor; the air guide channel extends from the upper end of the rotor core to the lower end of the rotor core and simultaneously extends along the opposite direction of the rotation direction of the rotor; the high-speed motor further includes: a centrifugal fan generating negative pressure at the downstream of the air guide channel and a pressure increasing ring for pushing the air flow from the outside of the air guide channel to the upstream of the air guide channel; the centrifugal fan is fixed to the rotor shaft; the lower end cover is positioned between the centrifugal fan and the rotor iron core; the pressurizing ring is fixed to the upper end cover; the upper end cover is provided with a plurality of ribs; the pressurizing ring comprises an annular body and a plurality of induced draft bulges; the annular body is provided with a plurality of positioning grooves for embedding the ribs and a plurality of air gathering grooves for guiding airflow to enter the upstream of the air guide channel; the positioning groove is arranged at the bottom of the annular body; the air inducing bulge protrudes out of the top of the annular body; the air gathering groove penetrates through the annular body from the top of the annular body to the bottom of the annular body and is communicated to the air guide channel; the air gathering groove comprises a contraction section which is gradually contracted in the airflow flowing direction to guide the airflow to gather; the air-inducing bulge is provided with a guide surface for guiding the air flow to enter the air-gathering groove; the guide surface is connected to a groove wall surface of the wind gathering groove.
Further, the groove wall surface of the wind gathering groove comprises: a tank bottom surface, a left tank bottom surface and a right tank bottom surface; the left groove surface and the right groove surface are respectively connected to two sides of the groove bottom surface; in the rotation direction of the rotor, the right groove surface is positioned at the front side of the left groove surface; the guide surface is connected to the left groove surface.
Furthermore, the bottom surface of the groove is a cambered surface; the bottom surfaces of the plurality of grooves are part of the outer peripheral surface of the same cylinder.
Further, the right groove face includes: upper right and lower right; the left groove face includes: upper left and lower left; the wind gathering groove forms a contraction section between the left upper surface and the right upper surface; the upper right surface is connected to the lower right surface; the upper left surface is connected to the lower left surface; the right lower surface and the left lower surface are planes; the left lower surface is connected with the channel wall surface at one side of the air guide channel and is flush with the channel wall surface; the lower right surface is connected with the channel wall surface on the other side of the air guide channel and is flush with the channel wall surface.
Further, the contraction section gradually contracts from the top of the annular body to the bottom of the annular body and in the direction opposite to the rotation direction of the rotor.
Furthermore, the upper left surface is an arc surface; the upper right surface is a plane; the guide surface comprises a lower guide surface which is connected with and tangent to the upper left surface; the lower guide surface is a cambered surface.
Further, the guide surface also includes an upper guide surface; the upper guide surface is connected to the lower guide surface; the upper guide surface is a flat surface.
Further, the guide surface is located in the wind collecting groove in a projection in the direction of the rotation axis of the rotor.
Further, one side of the induced draft protrusion forms a guide surface; the other side of the induced draft bulge forms a back surface; the rear back surface is parallel to the upper guide surface.
Further, the inner side of the pressurizing ring is provided with a guide surface which leads the end part of the guide groove paper to approach inwards.
The invention has the advantage of good heat dissipation effect.
Not only can utilize the clearance between rotor and the son to circulate the air current can also utilize air guide channel circulation air current, and the radiating effect is good. The shape of the air guide channel in cooperation with the direction of rotation of the rotor also contributes to an increase in the flow velocity of the air flow. The pressurizing ring pushes the air flow to enter the air guide channel from the outside of the air guide channel, and the heat dissipation effect is good.
The guide surface guides the air flow to enter the air gathering groove, the contraction section of the air gathering groove can be gradually contracted in the air flow flowing direction to guide the air flow to gather, and then the air flow is guided to enter the air guide channel from the outside of the air guide channel through the air gathering groove.
Drawings
FIG. 1 is a schematic view of a rotor of a high speed electric machine of the present invention;
FIG. 2 is a top view of the structure of FIG. 1;
FIG. 3 is a schematic view of a step-up ring of the high speed motor of FIG. 1;
FIG. 4 is a schematic view of another perspective of the booster ring of FIG. 3;
FIG. 5 is an enlarged view of a portion of the structure of FIG. 1 at A;
FIG. 6 is an enlarged view of a portion of the structure of FIG. 1 at B;
fig. 7 is an enlarged view of a portion of the structure of fig. 1 at C.
The rotor comprises a rotor 100, a rotor shaft 10, a rotor core 20, a slot 21, slot paper 211, a commutator 30, an upper end cover 40, ribs 41, a lower end cover 50, an air guide channel 60, a centrifugal fan 70, a supercharging ring 80, an annular body 81, a positioning slot 811, an air gathering slot 812, a contraction section 8121, a slot bottom 8122, a left slot bottom 8123, an upper left surface 8123a, a lower left surface 8123b, a right slot bottom 8124, an upper right surface 8124a, a lower right surface 8124b, an air guide bulge 82, a guide surface 821, a lower guide surface 8211, an upper guide surface 8212, a back surface 822 and a guide surface 83.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 7, a high-speed motor includes: a stator and a rotor 100 rotating relative to the stator. The stator surrounds the rotor 100. The stator includes: stator core and stator coil. The rotor 100 includes: rotor coils, a rotor shaft 10, a rotor core 20, a commutator 30, an upper end cover 40, and a lower end cover 50. The commutator 30, the upper end cover 40, the rotor core 20, and the lower end cover 50 are sequentially fixed to the rotor shaft 10. Upper end cover 40 and lower end cover 50 are attached to both ends of rotor core 20, respectively. Rotor core 20 is formed with a plurality of slots 21. The slot 21 is provided with a slot paper 211. The rotor core 20 and the slot paper 211 together constitute the air guide passage 60. The air guide channel 60 may provide for the flow of air therethrough. An end of rotor core 20 near upper end cover 40 is defined as an upper end of rotor core 20. An end of rotor core 20 near lower end cover 50 defines a lower end of rotor core 20. The air guide passage 60 is inclined to the rotation axis of the rotor 100. Air guide passage 60 extends from the upper end of rotor core 20 toward the lower end of rotor core 20 while extending in the opposite direction to the rotation direction of rotor 100. The high-speed motor further includes: a centrifugal fan 70 and a booster ring 80. The centrifugal fan 70 generates a negative pressure downstream of the air guide passage 60. The plenum ring 80 is used to push the air flow from outside the air guide channel 60 into the upstream air guide channel 60. The centrifugal fan 70 is fixed to the rotor shaft 10. Lower end cover 50 is located between centrifugal fan 70 and rotor core 20. The booster ring 80 is fixed to the upper end cap 40. The upper cap 40 is formed with a plurality of ribs 41. The booster ring 80 includes an annular body 81 and a plurality of induced draft protrusions 82. The annular body 81 is formed with a plurality of positioning grooves 811 and a plurality of wind collecting grooves 812. The positioning grooves 811 are for the ribs 41 to be inserted. The air collection channel 812 directs the air flow upstream of the air guide channel 60. The positioning groove 811 is disposed at the bottom of the ring body 81. The induced draft protrusion 82 protrudes from the top of the ring body 81. The air collecting groove 812 penetrates the annular body 81 from the top of the annular body 81 to the bottom of the annular body 81 and communicates to the air guide passage 60. Wind gathering tank 812 includes a constriction 8121. The converging section 8121 tapers in the direction of airflow to direct the airflow to converge. Specifically, the contraction section 8121 gradually contracts from the top of the annular body 81 to the bottom of the annular body 81 and in the direction opposite to the rotation direction of the rotor 100. The air guide projection 82 is formed with a guide surface 821. The guide surface 821 guides the airflow into the wind accumulating groove 812. The guide surface 821 is connected to a groove wall surface of the wind collecting groove 812.
When the rotor 100 rotates, the induced draft protrusion 82 protrudes from the top of the annular body 81, and the direction of the guide surface 821 of the induced draft protrusion 82 is the same as the direction of the rotor 100 when rotating, so that the greater the speed of the rotor 100 rotating, the faster the flow speed of the air flow guided by the guide surface 821 into the air collecting groove 812 is, and the better the heat dissipation effect is.
The booster ring 80 is installed in an included angle area between the rotor coil and the rotor core 20, and space is effectively saved.
As a specific embodiment, the groove wall surface of the wind collecting groove 812 includes: slot floor 8122, left slot floor 8123, and right slot floor 8124. Left slot face 8123 and right slot face 8124 are connected to both sides of slot face 8122, respectively. The right slot face 8124 is located on the front side of the left slot face 8123 in the rotation direction of the rotor 100. The guide surface 821 is connected to the left groove surface 8123. Specifically, the groove bottom surface 8122 is an arc surface. The plurality of groove bottom faces 8122 are part of the outer peripheral surface of the same cylinder.
The air collecting groove 812 penetrates the annular body 81 from the top of the annular body 81 to the bottom of the annular body 81 and communicates to the air guide passage 60. The contraction section 8121 of the wind gathering groove 812 gradually contracts from the top of the annular body 81 to the bottom of the annular body 81 along the direction opposite to the rotation direction of the rotor 100 to guide the airflow to gather, and then the airflow is guided to enter the air guide channel from the outside of the air guide channel through the wind gathering groove 812, and the larger the airflow flows, the better the heat dissipation effect is.
As a specific embodiment, the right groove face 8124 includes: an upper right face 8124a and a lower right face 8124 b. Left groove face 8123 includes: an upper left face 8123a and a lower left face 8123 b. The wind-gathering channel 812 forms a constriction 8121 between the upper left face 8123a and the upper right face 8124 a. The upper right face 8124a is connected to the lower right face 8124 b. The upper left face 8123a is connected to the lower left face 8123 b. The right lower face 8124b and the left lower face 8123b are planes. The lower left face 8123b is flush with and in contact with the channel wall surface on one side of the air guide channel 60. The lower right face 8124b is flush with and in contact with the other side of the air guide passage 60.
As a specific embodiment, the upper left face 8123a is a cambered surface. The upper right 8124a is a plane. Guide surface 821 includes a lower guide surface 8211. The lower guide surface 8211 is connected to and tangent to the upper left face 8123 a. The lower guide surface 8211 is a curved surface.
As a specific embodiment, the guide surface 821 also includes an upper guide surface 8212. The upper guide surface 8212 is connected to the lower guide surface 8211. The upper guide surface 8212 is a flat surface. The guide surface 821 is located in the wind accumulating groove 812 in a projection in the direction of the rotation axis of the rotor 100.
During the processing of the rotor 100, the rotor 100 rotates in the glue dispenser to be coated or dripped with glue. The pressurizing ring 80 can be fixed to the upper end cap 40 by gluing without additional processes. The reliability of the fixation of the pressure increasing ring 80 is further improved.
As a specific embodiment, one side of the induced draft protrusion 82 forms a guide surface 821. The other side of the induced draft projections 82 forms a rear back 822. The rear back surface 822 is parallel to the upper guide surface 8212.
In a specific embodiment, the booster ring 80 has a guide surface 83 formed on the inner side thereof. The guide surface 83 guides the end of the guide groove sheet 211 inwardly.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (9)
1. A high speed electric machine comprising: a stator and a rotor rotating relative to the stator; the stator surrounds the rotor; the stator includes: a stator core and a stator coil; the rotor includes: the rotor comprises a rotor shaft, a rotor iron core, a commutator, an upper end cover and a lower end cover; the commutator, the upper end cover, the rotor core and the lower end cover are sequentially fixed to the rotor shaft; the upper end cover and the lower end cover are respectively attached to two ends of the rotor core; the rotor core is formed with a plurality of slots; the groove is internally provided with groove paper; it is characterized in that the preparation method is characterized in that,
the rotor iron core and the slot paper jointly form an air guide channel through which air can pass; one end of the rotor core, which is close to the upper end cover, is defined as the upper end of the rotor core; one end of the rotor core, which is close to the lower end cover, is defined as the lower end of the rotor core; the air guide channel is inclined to the rotation axis of the rotor; the air guide channel extends from the upper end of the rotor core to the lower end of the rotor core and simultaneously extends in the opposite direction of the rotation direction of the rotor;
the high-speed motor further includes: a centrifugal fan for generating negative pressure downstream of the air guide channel and a booster ring for pushing the air flow from outside the air guide channel to upstream of the air guide channel; the centrifugal fan is fixed to the rotor shaft; the lower end cover is positioned between the centrifugal fan and the rotor core; the booster ring is fixed to the upper end cover; the upper end cover is provided with a plurality of ribs; the pressurizing ring comprises an annular body and a plurality of induced draft bulges; the annular body is provided with a plurality of positioning grooves for embedding the ribs and a plurality of air gathering grooves for guiding airflow to enter the upstream of the air guide channel; the positioning groove is arranged at the bottom of the annular body; the air inducing bulge protrudes out of the top of the annular body; the air gathering groove penetrates through the annular body from the top of the annular body to the bottom of the annular body and is communicated to the air guide channel; the air gathering groove comprises a contraction section which is gradually contracted in the airflow flowing direction to guide the airflow to gather; the air inducing bulge is provided with a guide surface for guiding airflow to enter the air gathering groove; the guide surface is connected with the groove wall surface of the wind gathering groove; the contraction section gradually contracts from the top of the annular body to the bottom of the annular body in a direction opposite to the rotation direction of the rotor.
2. A high-speed electric machine according to claim 1,
the groove wall surface of the wind gathering groove comprises: a tank bottom surface, a left tank bottom surface and a right tank bottom surface; the left groove surface and the right groove surface are respectively connected to two sides of the groove bottom surface; the right groove surface is positioned on the front side of the left groove surface in the rotation direction of the rotor; the guide surface is connected to the left groove surface.
3. A high-speed electric machine according to claim 2,
the bottom surface of the groove is an arc surface; the groove bottom surfaces are part of the outer peripheral surface of the same cylinder.
4. A high-speed electric machine according to claim 2,
the right groove face includes: upper right and lower right; the left groove face comprises: upper left and lower left; said wind gathering channel forming said converging section between said upper left face and said upper right face; the upper right face is connected to the lower right face; the upper left face is connected to the lower left face; the right lower surface and the left lower surface are planes; the left lower surface is connected with and level with the channel wall surface at one side of the air guide channel; the right lower surface is connected with and level with the channel wall surface on the other side of the air guide channel.
5. A high-speed electric machine according to claim 4,
the upper left surface is an arc surface; the upper right surface is a plane; the guide surface comprises a lower guide surface which is connected with and tangent to the upper left surface; the lower guide surface is a cambered surface.
6. A high speed electric machine according to claim 5,
the guide surface further comprises an upper guide surface; the upper guide surface is connected to the lower guide surface; the upper guide surface is a flat surface.
7. A high speed electric machine according to claim 6,
the guide surface is located in the wind gathering groove in a projection in a direction of a rotation axis of the rotor.
8. A high-speed electric machine according to claim 7,
one side of the induced draft bulge forms the guide surface; the other side of the induced draft bulge forms a back surface; the rear back surface is parallel to the upper guide surface.
9. A high-speed electric machine according to claim 1,
and a guide surface for guiding the end part of the slot paper to approach inwards is formed on the inner side of the pressurizing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911101891.9A CN111030344B (en) | 2019-11-12 | 2019-11-12 | High-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911101891.9A CN111030344B (en) | 2019-11-12 | 2019-11-12 | High-speed motor |
Publications (2)
| Publication Number | Publication Date |
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| CN111030344A CN111030344A (en) | 2020-04-17 |
| CN111030344B true CN111030344B (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911101891.9A Active CN111030344B (en) | 2019-11-12 | 2019-11-12 | High-speed motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN111030344B (en) |
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| CN2744863Y (en) * | 2004-11-09 | 2005-12-07 | 浙江工业大学 | Pipe flow type electric pump |
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