CN110311511B - Diversion end ring of motor, motor stator, motor and household appliance - Google Patents
Diversion end ring of motor, motor stator, motor and household appliance Download PDFInfo
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- CN110311511B CN110311511B CN201910639380.6A CN201910639380A CN110311511B CN 110311511 B CN110311511 B CN 110311511B CN 201910639380 A CN201910639380 A CN 201910639380A CN 110311511 B CN110311511 B CN 110311511B
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
Abstract
The invention provides a diversion end ring of a motor, a motor stator, the motor and a household appliance, wherein a first circumferential wall of the diversion end ring is provided with a first inner circumferential surface and an outer circumferential surface, one of the first inner circumferential surface and the outer circumferential surface is a diversion surface, the other one of the first inner circumferential surface and the outer circumferential surface is an assembly surface, a plurality of sunken diversion through grooves are formed on the diversion surface, and the extending direction of the diversion through grooves is inclined to the axial direction of the first circumferential wall. The motor stator comprises a stator core and a stator winding, the diversion end ring is arranged at the adjacent position of the winding end part of the stator winding, the motor comprises a motor stator and a motor rotor, and an air gap is formed between the motor stator and the motor rotor; the flow guide surface faces the motor rotor, an airflow gap is formed between the flow guide surface and the motor rotor, and the airflow gap is communicated with the air gap. The household appliance includes a motor. Under the guide effect of a plurality of inclined grooves, new air continuously enters the air gap from the outside, and hot gas in the air gap is sent out, so that the heat dissipation of the surface of the motor rotor is realized.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a diversion end ring of a motor, a motor stator, a motor and a household appliance.
Background
The existing high-speed motor has the characteristics of small volume and high power density, but because the rotating speed and the winding current frequency are high when the motor works, the iron loss, the copper loss, the high-frequency eddy current loss and the surface air friction loss of a motor rotor on each volume unit of a motor stator are much larger than those of a common motor with the same power grade, so that the motor generates heat seriously, and if the temperature of the motor exceeds the temperature rise limit, the insulation performance of the motor is influenced, and the service life of the motor is shortened.
The surface of the motor rotor facing the air gap generates heat seriously, so that the heat dissipation effect between the motor rotor and the motor stator needs to be improved.
Disclosure of Invention
The invention aims to provide a guide end ring for solving the problem of heating of the outer surface of a motor rotor.
The second purpose of the invention is to provide a motor stator for solving the problem of heat generation on the outer surface of a motor rotor.
A third object of the present invention is to provide a motor that solves the problem of heat generation on the outer surface of the rotor of the motor.
A fourth object of the present invention is to provide a household appliance having an extended service life.
The guide end ring of the motor provided by the first object of the invention comprises a first circumferential wall, wherein the first circumferential wall is provided with a first inner circumferential surface facing to the axis and an outer circumferential surface facing away from the axis; one of the first inner peripheral surface and the first outer peripheral surface is a flow guide surface, and the other one of the first inner peripheral surface and the first outer peripheral surface is an assembly surface; the guide surface is provided with a plurality of sunken guide through grooves, the guide through grooves extend from the axial inner end of the guide end ring to the axial outer end of the guide end ring, and the extending direction of the guide through grooves is inclined to the axial direction of the first circumferential wall.
According to the scheme, no matter the motor is an outer stator motor or an outer rotor motor, an air gap is formed between the motor stator and the motor rotor, after the diversion end ring is installed at the adjacent position of the end part of the winding on the motor stator, the airflow gap formed between the diversion end ring and the motor rotor is communicated with the air gap from the two axial ends of the air gap, after the motor rotor rotates, new air continuously enters the air gap from the outside under the diversion effect of the inclined grooves, and hot gas in the air gap is sent out, so that the heat dissipation of the surface of the motor rotor is realized.
In a further scheme, on the radial projection of the flow guide through groove pointing to the axis, an included angle formed between the flow guide through groove and the axis is 30-60 degrees.
Therefore, the maximum flow guiding effect of the flow guiding through groove can be guaranteed, the air exchange effect of the air gap is further improved, and the heat dissipation effect is further improved.
The first inner circumferential surface is a flow guiding surface, and the outer circumferential surface is an assembling surface.
The further scheme is that an airflow channel is arranged in the diversion end ring, a first airflow port and a second airflow port are respectively arranged at two extending ends of the airflow channel, the first airflow port is positioned at the axial outer end, and the second airflow port is communicated with the surrounding position of the diversion surface.
Therefore, the first airflow port can be externally connected with a positive pressure or negative pressure generating device, so that the ventilation efficiency is actively improved, and the heat dissipation effect is improved.
In a further aspect, the guide end ring has a second inner circumferential surface facing the shaft center, the second inner circumferential surface has a second inner diameter larger than the first inner diameter of the first inner circumferential surface, and the second airflow port is formed in the second inner circumferential surface.
From top to bottom, the second air-flow mouth is located the radial outside of water conservancy diversion face, and this setting guarantees that the air flows out along water conservancy diversion logical groove smoothly.
The guide end ring further comprises a circular ring baffle, the circular ring baffle is sequentially connected with the first circumferential wall along the axial direction, and the circular ring baffle is closer to the outer end of the first circumferential wall in the axial direction.
Therefore, the arrangement of the annular baffle plate enables the installation of the guide end ring to be more stable.
In a further aspect, the gas flow passage is disposed within the annular baffle.
From top to bottom, the radial span of ring baffle is great, and the air current passageway setting is arranged the degree of freedom in the ring baffle and is bigger, and the installation of the motor end cover of being more convenient for and external atmospheric pressure production device.
The guide end ring further comprises a second circumferential wall arranged at the axial outer end, and the second circumferential wall is positioned at the inner circumference of the first circumferential wall; an airflow space is formed between the second circumferential wall and the first circumferential wall, the second airflow port is communicated to the airflow space, and the airflow space is communicated to the surrounding part of the flow guide surface.
Therefore, the arrangement ensures that the fresh air sent out from the second airflow port is further pushed towards the flow guide surface, so that the effective conveying rate of the fresh air is improved, and the ventilation effect is ensured.
It is further preferred that the airflow space surrounds the periphery of the second circumferential wall.
Therefore, the airflow space is arranged in a surrounding shape, so that the fresh air is dispersed on each part of the flow guide surface and then reaches each part of the air gap, and therefore heat dissipation on each part of the outer surface of the motor is more uniform.
The further scheme is that the assembling surface is a circular table surface, and the outer diameter of the assembling surface is reduced from the axial outer end to the axial inner end.
As can be seen, this arrangement provides a tighter fit between the conducting end ring and the stator winding.
The first circumferential wall is provided with a third inner circumferential surface facing the axis, the first inner circumferential surface and the third inner circumferential surface are sequentially arranged along the axial direction, and the third inner circumferential surface is close to the axial outer end relative to the first inner circumferential surface; the third inner diameter of the third inner circumferential surface is larger than the first inner diameter of the first inner circumferential surface, and a sunken annular step is formed between the third inner circumferential surface and the first inner circumferential surface.
Therefore, the annular step position is formed by material removing machining, the whole weight of the motor can be reduced by the arrangement, and the light weight of the motor is realized.
In a further aspect, the flow guiding through groove extends through the first circumferential wall along a straight line between the axial outer end and the axial inner end.
In another further aspect, the air guiding through groove penetrates between the axial outer end and the axial inner end of the first circumferential wall along a curve.
Therefore, the diversion through grooves with different extension modes can be selected according to the factors such as the rotating speed of the motor, the outer diameter of the motor rotor and the like, and different heat dissipation effects can be achieved.
The motor stator provided by the second object of the invention comprises a stator core and a stator winding, wherein the two axial ends of the stator winding are respectively provided with a winding end part protruding out of the stator core, the two axial ends of the motor stator are respectively provided with a diversion end ring, and the diversion end rings adopt the diversion end rings; in the radial direction of the motor stator, the diversion end ring is arranged adjacent to the winding end part, and the assembly surface is matched with the winding end part.
According to the scheme, no matter the outer stator motor or the outer rotor motor is adopted, an air gap is formed between the motor stator and the motor rotor, the gap formed between the diversion end ring and the motor rotor is communicated with the air gap from the two axial ends of the air gap, after the motor rotor rotates, new air continuously enters the air gap from the outside under the diversion effect of the inclined grooves, hot air in the air gap is sent out, and heat dissipation of the surface of the motor rotor is achieved through air exchange.
The motor stator is characterized in that two axial ends of the motor stator are respectively provided with a cooling end ring, a refrigerant channel is arranged in the cooling end ring in a surrounding manner, and two extending ends of the refrigerant channel are respectively provided with a refrigerant channel inlet and a refrigerant channel outlet; in the radial direction of the motor stator, the refrigerant end ring is arranged adjacent to the winding end part, and the refrigerant end ring and the diversion end ring are respectively positioned at two opposite sides of the winding end part. Therefore, the winding end parts at the two axial ends of the stator winding have larger heat productivity, the two axial ends of the motor are respectively provided with a cooling end ring, and cooling liquid or cooling gas is infused into the cooling end rings, so that the heat dissipation of the winding end parts is realized.
The cooling end ring is internally provided with a plurality of cooling medium channels which are arranged along the axial direction.
Therefore, the refrigerant channel is added to increase the heat dissipation area and improve the heat dissipation effect.
The cooling end ring is provided with a first connector at an inlet of a refrigerant channel, a second connector at an outlet of the refrigerant channel, and the first connector and the second connector are arranged adjacently; and heat insulation gaps are formed between the first connector and the winding end part and between the second connector and the winding end part.
Therefore, the heat insulation gap is arranged to prevent the winding end part with high temperature from directly contacting the first connector or the second connector to damage the first connector and the second connector.
The motor stator further comprises a positioning ring, and the positioning ring is arranged between the stator core and the cooling end ring; the positioning ring is provided with a first positioning part, the cooling end ring is provided with a second positioning part, and the first positioning part is matched with the second positioning part; one of the first positioning part and the second positioning part is a positioning opening arranged along the axial direction, and the other one of the first positioning part and the second positioning part is a positioning bulge arranged along the axial direction.
As can be seen, this arrangement makes the cooling end ring more robust to installation.
In a further scheme, the section of the refrigerant channel is polygonal.
In a further proposal, the section of the refrigerant channel is in a diamond shape.
Therefore, the arrangement can increase the inner surface area of the refrigerant channel, namely increase the heat dissipation area.
The motor provided by the third object of the invention comprises a motor stator and a motor rotor, wherein an air gap is formed between the motor stator and the motor rotor; the motor stator adopts the motor stator, the flow guide surface faces the motor rotor, an airflow gap is formed between the flow guide surface and the motor rotor, and the airflow gap is communicated with the air gap.
The fourth object of the present invention is to provide a household appliance, which comprises a motor, wherein the motor is the above motor.
Drawings
Fig. 1 is a cross-sectional view of a first embodiment of the motor of the present invention.
Fig. 2 is a structural view of a first embodiment of the motor of the present invention.
Fig. 3 is a block diagram of a stator ring at a first axial end of a first embodiment of a motor of the present invention.
Fig. 4 is a cross-sectional view of a inducer ring at a first axial end of a first embodiment of a machine of the invention.
Fig. 5 is a structural view of a baffle ring at the second axial end of the motor according to the first embodiment of the motor of the present invention.
Fig. 6 is a cross-sectional view of a inducer ring at a second axial end of the machine in accordance with a first embodiment of the machine of the invention.
Fig. 7 is a structural view of a cooling end ring in the first embodiment of the motor of the present invention.
Fig. 8 is a cross-sectional view of a cooling end ring in a first embodiment of the electric machine of the present invention.
Fig. 9 is a structural view of a positioning ring in a first embodiment of the motor of the present invention.
Fig. 10 is a cross-sectional view of a second embodiment of the motor of the present invention.
Fig. 11 is a cross-sectional view of a inducer ring of a second embodiment of the machine of the invention.
Fig. 12 is a cross-sectional view of a inducer ring of a third embodiment of the machine of the invention.
Fig. 13 is a partial cross-sectional view of a inducer ring of a fourth embodiment of the machine of the invention.
Fig. 14 is a partial cross-sectional view of a inducer ring of a fifth embodiment of the machine of the invention.
Fig. 15 is a cross-sectional view of a inducer ring of a sixth embodiment of the machine of the invention.
Fig. 16 is a schematic cross-sectional view of a seventh embodiment of the motor of the present invention.
Detailed Description
The invention provides a household electrical appliance such as a washing machine, a range hood, an air conditioner, a fan, an air purifier and the like, wherein a motor for realizing high-speed rotation driving is arranged in the household electrical appliance.
First embodiment of the Motor
Referring to fig. 1 and 2, fig. 1 is a sectional view of a first embodiment of the motor of the present invention, and fig. 2 is a structural view of the first embodiment of the motor of the present invention. The motor comprises a motor stator 1 and a motor rotor 2 positioned on the inner periphery of the motor stator 1, wherein the motor stator 1 is provided with a stator core 11 and a stator winding wound on the stator core 11, the stator winding is provided with a winding end part 121 and a winding end part 122 which respectively protrude from two axial ends of the stator core 11 in the axial direction of the motor, and when the motor operates, the winding end part 121 and the winding end part 122 generate more heat than the middle part of the stator winding; an air gap 101 is formed between the inner surface of the stator core 11 and the outer surface of the motor rotor 2, and the outer surface of the motor rotor 2 also has a serious problem of heat generation during the operation of the motor.
To solve the above two heat generation problems, the electric machine further includes a conducting end ring 13, a conducting end ring 16, two positioning rings 14 and two cooling end rings 15, the conducting end ring 13 is disposed on the inner periphery of the winding end portion 121 to cooperate with the axial first end of the air gap 101, and the conducting end ring 16 is disposed on the inner periphery of the winding end portion 122 to cooperate with the axial second end of the air gap 101; one retaining ring 14 and one cooling end ring 15 are in turn fitted around the outer circumference of the winding overhang 121, and the other retaining ring 14 and the other cooling end ring 15 are in turn fitted around the outer circumference of the winding overhang 122.
Referring to fig. 3 and 4, fig. 3 is a structural view of a leading end ring 13 according to a first embodiment of the motor of the present invention, and fig. 4 is a sectional view of the leading end ring 13 according to the first embodiment of the motor of the present invention. Since the use of the guide end rings 13 and 16 involves the flow direction of the air flow, the structure of the guide end rings 13 and 16 in this embodiment is different as a preferred embodiment, and the guide end rings 13 will be described in detail first.
The guide end ring 13 is provided with a first circumferential wall 131, a second circumferential wall 132 and a circular ring baffle 133, in the axial direction of the guide end ring 13, the guide end ring 13 is provided with an axial inner end 13a facing the center of the motor and an axial outer end 13b facing away from the center of the motor, the first circumferential wall 131 extends from the axial inner end 13a to the axial outer end 13b along the axial direction, the circular ring baffle 133 is connected to the axial end of the first circumferential wall 131, and the circular ring baffle 133 is positioned at the axial outer end 13 b; the second circumferential wall 132 is connected to the annular baffle 133 and is located on the inner periphery of the first circumferential wall 131, the second circumferential wall 132 being closer to the axially outer end 13b than to the axially inner end 13 a.
The first circumferential wall 131 has a first inner circumferential surface facing the axial center and an outer circumferential surface facing away from the axial center, the first inner circumferential surface is a flow guiding surface 131b, and the outer circumferential surface is a mounting surface 131 a. The diversion surface 131b is close to the axial inner end 13a, the second circumferential wall 132 does not shield the diversion surface 131b, a plurality of diversion through grooves 134 uniformly arranged along the circumferential direction are arranged on the diversion surface 131b, the diversion through grooves 134 extend from the axial inner end 13a to the axial outer end 13b along a straight line, the extending direction of the diversion through grooves 134 is inclined to the axis of the first circumferential wall 131, and on the radial projection of the diversion through grooves 134 pointing to the axis (i.e., the projection of the viewing angle shown in fig. 4), an included angle a1 formed between the diversion through grooves 134 and the axis is 30 degrees. The fitting surface 131a is fitted with the winding head 121 (shown in fig. 1).
An annular air flow space 135 is formed between the first circumferential wall 131 and the second circumferential wall 132, the first circumferential wall 131 and the second circumferential wall 132 are substantially integrated, and the air flow space 135 is formed by performing annular cutting processing from the axial inner end 13a to the axial outer end 13b by a cutter, and the second circumferential wall 132 and the first circumferential wall 131 are formed on the inner side and the outer side of the air flow space 135 respectively.
The annular baffle 133 is provided with a radially extending air flow passage 136, a hole is drilled from the outer periphery of the annular baffle 133 to form the air flow passage 136 and a second air flow port 136b communicated with the air flow space 135, and then a hole is drilled in the outer axial end surface of the annular baffle 133 to form a first air flow port 136a communicated with the air flow passage 136, while the drilled hole in the outer periphery of the annular baffle 133 is blocked by a blocking member 137, which may be a rubber plug or a sealing bolt, etc. Therefore, the first air flow port 136a, the air flow channel 136, the second air flow port 136b, the annular air flow space 135, and the surrounding portion of the flow guide surface 131b are sequentially communicated.
Referring to fig. 5 and 6, fig. 5 is a structural view of the leading end ring 16 in the first embodiment of the motor of the present invention, and fig. 6 is a sectional view of the leading end ring 16 in the first embodiment of the motor of the present invention. The guide end ring 16 has a first circumferential wall 161 and a ring baffle 162, the guide end ring 16 has an axial inner end 16a facing the center of the motor and an axial outer end 16b facing away from the center of the motor in the axial direction of the guide end ring 16, the first circumferential wall 161 extends from the axial inner end 16a to the axial outer end 16b in the axial direction, the ring baffle 162 is connected to the axial end of the first circumferential wall 161, and the ring baffle 162 is located at the axial outer end 16 b.
The first circumferential wall 161 has an inner circumferential surface facing the axial center and an outer circumferential surface facing away from the axial center, the inner circumferential surface being a flow guide surface 161b, and the outer circumferential surface being a fitting surface 161 a. The guide surface 161b is close to the axial inner end 16a, a plurality of guide through grooves 163 uniformly arranged along the circumferential direction are arranged on the guide surface 161b, the guide through grooves 163 extend from the axial inner end 16a to the axial outer end 16b along a straight line, the extending direction of the guide through grooves 163 is inclined to the axis of the first circumferential wall 161, and an included angle a2 formed between the guide through grooves 163 and the axis is 60 degrees on a radial projection (i.e., a projection of a viewing angle shown in fig. 4) of the guide through grooves 163 pointing to the axis. The fitting surface 161a is fitted with the winding end portion 122 (shown in fig. 1).
The annular baffle plate 162 is provided with an airflow passage 164 extending in the radial direction, a hole is drilled from the outer periphery of the annular baffle plate 162 to form the airflow passage 164 and a second airflow port 164b communicated to the surrounding part of the annular baffle plate 162, then a first airflow port 164a communicated to the airflow passage 164 is drilled from the axial outer end surface of the annular baffle plate 162, and the drilled hole at the outer periphery of the annular baffle plate 162 is blocked by a blocking member 165, wherein the blocking member 165 may be a rubber plug or a sealing bolt, etc.
The second inner diameter of the second inner circumferential surface where the second airflow port 164b is located is larger than the first inner diameter of the guide surface 161 b. Since the inducer ring 16 is located downstream in the air flow direction and the first air flow port 164a is externally connected to a negative pressure generating device, this arrangement ensures that the hot air exhausted from the air gap 101 (shown in fig. 1) flows into the second air flow port 164b tightly against the inducer grooves 163 on the inducer surface 161 b.
With reference to fig. 1, 4 and 6, the diversion end ring 13 is mounted on the first axial end of the motor stator 1 where the winding end 121 is located, the first circumferential wall 131 is located on the inner circumference of the winding end 121, the assembly surface 131a is matched with the inner circumferential surface of the winding end 121, the annular baffle 133 is shielded on the outer axial side of the winding end 121, the diversion surface 131b of the first circumferential wall 131 forms the air flow gap 102 with the outer surface of the motor rotor 2, and the air flow gap 102 is communicated with the air gap 101.
The diversion end ring 16 is installed on the first axial end of the motor stator 1 where the winding end 122 is located, the first circumferential wall 161 is located on the inner circumference of the winding end 121, the assembling surface 161a is matched with the inner circumference surface of the winding end 122, the annular baffle 162 shields the outer axial side of the winding end 122, an air flow gap 103 is formed between the diversion surface 161b of the first circumferential wall 161 and the outer surface of the motor rotor 2, and the air flow gap 103 is communicated with the air gap 101.
The first airflow port 136a is externally connected with a positive pressure generating device on the guide end ring 13; the first airflow port 164a is externally connected to the end ring 16 for generating negative pressure. After the motor is operated, the cold airflow enters from the first airflow port 164a, and then enters the air gap 101 after passing through the airflow channel 136, the second airflow port 136b, the annular airflow space 135 and the airflow gap 102 in sequence. Under the blocking and flow guiding of the second circumferential wall 132, the annular airflow space 135 faces the plurality of flow guiding slots 134 on the flow guiding surface 131b, and the cold airflow sufficiently enters the airflow gap 102 and reaches the air gap 101 for ventilation and heat dissipation.
Subsequently, the hot air generated by the heat generation of the outer surface of the motor rotor 2 flows toward the airflow gap 103 under the pushing of the airflow, enters the airflow passage 164 from the second airflow port 164b under the operation of the negative pressure generating device, and is finally sent out from the first airflow port 164 a.
After the motor rotor 2 rotates, the airflow brought out from the outer periphery of the motor rotor inevitably has motion components in the axial direction, the radial direction and the rotating direction, and therefore, the flow guiding through grooves 134 and the flow guiding through grooves 163 are inclined to adapt to the flow direction of the gas generated when the motor rotor 2 rotates, so that the air flow circulation is improved, and the heat exchange effect is enhanced.
Referring to fig. 1, 2, 7 and 8, fig. 7 is a structural view of a cooling end ring in a first embodiment of the motor of the present invention, and fig. 8 is a sectional view of the cooling end ring in the first embodiment of the motor of the present invention. The cooling end ring 15 is formed by bending a straight cooling tube row 150 into a circular shape, and the material of the cooling tube row 150 is a metal with good thermal conductivity, such as aluminum, copper, aluminum-copper alloy, and the like. The cooling end ring 15 has a plurality of cooling medium channels 153 arranged around the cooling end ring 15, the cross section of each cooling medium channel 153 is a diamond shape, and the plurality of cooling medium channels 153 are arranged along the axial direction of the motor stator 1. The two extending ends of the refrigerant channel 153 are respectively provided with a refrigerant channel inlet and a refrigerant channel outlet, the cooling end ring 15 is provided with a first connector 151 at the refrigerant channel inlet, the refrigerant end ring is provided with a second connector 152 at the refrigerant channel outlet, the refrigerant channel inlet of each refrigerant channel 153 is communicated to the first connector 151, and the refrigerant channel outlet of each refrigerant channel 153 is communicated to the second connector 152.
The first connection head 151 and the second connection head 152 are disposed adjacent to each other, and the first connection head 151 and the second connection head 152 are protruded away from the axial center with respect to the cooling tube row 150, so that when the cooling end ring 15 is sleeved on the outer periphery of the winding end portion 121 or the winding end ring 122, due to the protruded arrangement of the first connection head 151 and the second connection head 152, an insulation gap 104 (shown in fig. 1 and 2) is formed between each of the first connection head 151 and the second connection head 152 and the winding end portion 121 or the winding end portion 122.
Referring to fig. 9, fig. 9 is a structural diagram of a positioning ring according to a first embodiment of the motor of the present invention. The positioning ring 14 is provided with a positioning port 141 arranged along the axial direction, and the positioning ring 14 can be welded or adhered to the axial outer end face of the stator core 11; in the axial direction of the cooling end ring 15, the first joint 151 and the second joint 152 protrude with respect to the cooling tube row 150 to form a positioning protrusion 154.
Referring to fig. 1, taking the winding end 121 as an example, after the cooling tube bundle 150 is sleeved on the outer circumference of the winding end 121, the positioning protrusion 154 extends into the positioning opening 141 of the positioning ring 14, so as to achieve circumferential positioning and prevent the cooling end ring 15 from deflecting. In the axial direction of the motor stator 1, the length of the cooling end ring 15 is greater than the length of the winding end portion 121 or the winding end portion 122, so that the cooling end ring 15 wrapped around the winding end portion 121 or the winding end portion 122 can completely cover the outer circumferential surface of the winding end portion 121 or the winding end portion 122, and a maximum heat dissipation area is obtained to achieve an optimal heat dissipation effect.
The first connector 151 and the second connector 152 are respectively provided with a channel opening facing the axial direction of the motor, the refrigerant output pipe is connected to the channel opening of the first connector 151, and the refrigerant recovery pipe is connected to the channel opening of the second connector 152, so that the refrigeration work of the cooling end ring 15 can be realized.
Referring to fig. 2 again, one cooling end ring 15 surrounds the annular baffle 133 on the guide end ring 13, and one cooling end ring 15 surrounds the annular baffle 162 on the guide end ring 16, and since the guide end ring 13 and the guide end ring 16 are disposed closely to the winding ends 121 and 122, respectively, heat on the guide end ring 13 and the guide end ring 16 can be transferred to the gas condensation end ring 15. In addition, the cooling end ring 15 also radially limits the plugs 137 and 165 on the outer peripheries of the annular baffles 133 and 162, thereby preventing the air passages from being broken due to loosening.
Second embodiment of the electric machine
Referring to fig. 10 and 11, fig. 10 is a sectional view of a second embodiment of the motor of the present invention, and fig. 11 is a sectional view of a conducting end ring of the second embodiment of the motor of the present invention. In this embodiment, the diversion end rings 33 having the same structure are installed on both sides of the motor stator 3, the diversion end rings 33 do not have the airflow channels and airflow spaces described in the first embodiment,
the guide end ring 33 comprises a first circumferential wall 331 and a circular baffle 332 which are sequentially connected along the axial direction, wherein the circular baffle 332 is close to the axial outer end 33b, and the first circumferential wall 331 is close to the axial inner end 33 a. A mounting surface 331a of the first circumferential wall 331 facing away from the axial center is a circular table surface, and the outer diameter of the mounting surface 331a gradually decreases from the axial outer end 33b to the axial inner end 33 a; correspondingly, the inner circumferential surface of the stator winding 32 is in a circular truncated cone shape at the winding end 321 and the winding end 322, and this arrangement makes the fitting surface 331a of the end ring 33 fit with the inner circumferential surface of the stator winding 32 more closely.
The first circumferential wall 331 has a first inner circumferential surface 331b and a third inner circumferential surface 331c facing the axis, the first inner circumferential surface 331b is a flow guide surface, and the flow guide surface is provided with a plurality of flow guide through grooves 333 inclined to the axis. The first inner peripheral surface 331b and the third inner peripheral surface 331c are arranged in this order in the axial direction, the third inner peripheral surface 331c is located closer to the axial outer end 33b than the first inner peripheral surface 331b, the third inner peripheral surface 331c has a third inner diameter larger than the first inner diameter of the first inner peripheral surface 331b, and a recessed annular step 334 is formed between the third inner peripheral surface 331c and the first inner peripheral surface 331 b. The annular step 334 is formed by material removal processing, and the overall weight of the motor can be reduced by the arrangement, so that the motor is light.
In this embodiment, the notch at the extending end of the guiding through groove 333 faces the axial end of the air gap 301, the ventilation and heat dissipation of this embodiment mainly drives the air to flow by the rotation of the motor rotor 4, and after the air reaches the notch of the guiding through groove 333, the air is brought out under the guidance of the guiding through groove 333 arranged obliquely, and accordingly, at the other axial end of the motor, the fresh air flows into the air gap 301 along the guiding through groove 333 under the self-regulation of pressure, thereby completing the heat exchange.
Third embodiment of the Motor
Referring to fig. 12, fig. 12 is a cross-sectional view of a inducer ring in a third embodiment of the machine of the present invention. In this embodiment, the baffle ring 53 does not have the annular baffle, the baffle ring 53 has a first circumferential wall 531 and a second circumferential wall 532 located at the inner periphery of the first circumferential wall 531, the first circumferential wall 531 extends from the axial inner end 53a to the axial outer end 53b, and the second circumferential wall 532 is close to the axial outer end 53b and does not shield the baffle surface 531b on the first circumferential wall 531, which is the same as the first embodiment of the motor.
Between the first circumferential wall 531 and the second circumferential wall 532 there is a connecting portion 539 at the axially outer end 53b, in which connecting portion 539 an air flow duct 535 is formed drilled axially along the first circumferential wall 531, and at both ends of the extension of the air flow duct 535 there are first air flow ports 535a and second air flow ports 535b, which second air flow ports 535b communicate into an annular air flow space 534 between the first circumferential wall 531 and the second circumferential wall 532.
After the output end of the positive pressure generating device is connected to the first airflow port 535a, the cold airflow may also pass through the first airflow port 535a, the airflow channel 535, the second airflow port 535b, and the annular airflow space 534 in sequence and reach the guiding groove 533 on the guiding surface 531b, while the embodiment only matches with the winding end through the mounting surface 531a on the outer periphery of the first circumferential wall 531.
Fourth embodiment of the Motor
Referring to fig. 13, fig. 13 is a partial cross-sectional view of a inducer ring in a fourth embodiment of a motor of the invention. In this embodiment, the baffle ring 63 has no annular baffle, the air flow passage 635 is provided in the first circumferential wall 631, the first circumferential wall 631 is drilled with a hole facing the end face of the axially outer end 63b, and the assembling face 631a of the first circumferential wall 631 is cut to be flat, or the two drilling steps are sequentially switched, two mutually perpendicular holes are communicated to form the air flow passage 635, the opening of the air flow passage 635 on the assembling face 631a is blocked by a blocking member, the extended two ends of the air flow passage 635 are provided with a first air flow port 635a and a second air flow port 635b which are mutually perpendicular, and the second air flow port 635b is communicated to the air flow space 634 between the first circumferential wall 631 and the second circumferential wall 632.
Fifth embodiment of the Motor
Referring to fig. 14, fig. 14 is a partial cross-sectional view of a inducer ring in a fifth embodiment of the machine of the present invention. In this embodiment, the flow-guiding end ring 73 has only the first circumferential wall 731, the gas flow channel 733 is disposed on the first circumferential wall 731, the gas flow channel 733 has the first gas flow port 733a disposed along the axial direction and the second gas flow port 733b directed along the radial direction toward the axial center, and the second inner diameter of the second inner circumferential surface where the second gas flow port 733b is located is larger than the first inner diameter of the flow-guiding surface 731 b.
Sixth embodiment of the Motor
Referring to fig. 15, fig. 15 is a cross-sectional view of a inducer ring in a sixth embodiment of the machine of the invention. In this embodiment, the guiding through groove 833 extends between two axial ends of the first circumferential wall 83 along a curve, and on a radial projection of the guiding through groove 833 pointing to the axis (i.e., a projection of a viewing angle shown in fig. 15), an included angle a3 formed between the guiding through groove 833 and the axis is 40 degrees. The extending direction of the curved flow guide through groove 833 to the extending first end of the flow guide through groove 833 points to the linear direction of the other extending second end of the flow guide through groove 833.
Seventh embodiment of the Motor
Referring to fig. 16, fig. 16 is a schematic cross-sectional view of a seventh embodiment of the motor of the present invention. The six motor embodiments are all outer stator motors, and the embodiment is an outer rotor motor. Since the relative positions of the motor stator 91 and the motor rotor 92 are interchanged, the arrangement of the diversion end ring 93 and the cooling end ring 94 on the motor 9 is adjusted according to the position relationship between the motor stator 91 and the motor rotor 92.
The motor stator 91 is located on the inner periphery of the motor rotor 92, and the induction end ring 93 needs to be matched with the air gap 901, so in this embodiment, the induction end ring 93 is sleeved on the outer periphery of the winding end part 921, and the cooling end ring 94 is fixed on the inner periphery of the winding end part 921.
Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the present invention, and those skilled in the art may make various changes and modifications, and in other embodiments, the angle formed between the extending direction of the guiding through groove and the axial direction of the first circumferential wall is 30 degrees to 60 degrees, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (34)
1. A inducer end ring for an electric machine, comprising:
the first circumferential wall is provided with a first inner circumferential surface facing to the axle center and an outer circumferential surface facing away from the axle center;
the first inner circumferential surface is a flow guide surface, and the outer circumferential surface is an assembly surface;
a plurality of sunken diversion through grooves are formed in the diversion surface, the diversion through grooves extend from the axial inner end of the diversion end ring to the axial outer end of the diversion end ring, and the extending direction of the diversion through grooves is inclined to the axial direction of the first circumferential wall;
an airflow channel is arranged in the diversion end ring, and a first airflow port and a second airflow port are respectively arranged at two extending ends of the airflow channel;
the guide end ring is provided with a second inner circumferential surface facing the shaft center, the second inner diameter of the second inner circumferential surface is larger than the first inner diameter of the first inner circumferential surface, and the second air flow opening is formed in the second inner circumferential surface.
2. The inducer ring of claim 1, wherein:
on the radial projection of the flow guide through groove pointing to the axis, an included angle formed between the flow guide through groove and the axis is 30-60 degrees.
3. The inducer ring of claim 1 or 2, wherein:
the first airflow port is positioned at the axial outer end, and the second airflow port is communicated with the surrounding part of the flow guide surface.
4. The inducer end ring of claim 3, wherein:
the guide end ring further comprises a circular ring baffle, the circular ring baffle is sequentially connected with the first circumferential wall along the axial direction, and the circular ring baffle is closer to the axial outer end than the first circumferential wall.
5. The inducer ring of claim 4, wherein:
the airflow channel is arranged in the circular ring baffle.
6. The inducer ring of claim 1 or 2, wherein:
the assembling surface is a circular table surface, and the outer diameter of the assembling surface is reduced from the axial outer end to the axial inner end.
7. The inducer ring of claim 1 or 2, wherein:
the flow guide through groove penetrates through the position between the axial outer end and the axial inner end of the first circumferential wall along a straight line.
8. The inducer ring of claim 1 or 2, wherein:
the diversion through groove penetrates between the axial outer end and the axial inner end of the first circumferential wall along a curve.
9. A inducer end ring for an electric machine, comprising:
the first circumferential wall is provided with a first inner circumferential surface facing to the axle center and an outer circumferential surface facing away from the axle center;
the first inner circumferential surface is a flow guide surface, and the outer circumferential surface is an assembly surface;
a plurality of sunken diversion through grooves are formed in the diversion surface, the diversion through grooves extend from the axial inner end of the diversion end ring to the axial outer end of the diversion end ring, and the extending direction of the diversion through grooves is inclined to the axial direction of the first circumferential wall;
an airflow channel is arranged in the diversion end ring, and a first airflow port and a second airflow port are respectively arranged at two extending ends of the airflow channel;
the inducer end ring further comprises a second circumferential wall disposed at the axially outer end, the second circumferential wall being located at an inner circumference of the first circumferential wall;
an air flow space is formed between the second circumferential wall and the first circumferential wall, the second air flow port is communicated to the air flow space, and the air flow space is communicated to the surrounding part of the flow guide surface.
10. The inducer ring of claim 9, wherein:
on the radial projection of the flow guide through groove pointing to the axis, an included angle formed between the flow guide through groove and the axis is 30-60 degrees.
11. The inducer ring of claim 9 or 10, wherein:
the first airflow port is positioned at the axial outer end, and the second airflow port is communicated with the surrounding part of the flow guide surface.
12. The inducer end ring of claim 11, wherein:
the guide end ring further comprises a circular ring baffle, the circular ring baffle is sequentially connected with the first circumferential wall along the axial direction, and the circular ring baffle is closer to the axial outer end than the first circumferential wall.
13. The inducer end ring of claim 12, wherein:
the airflow channel is arranged in the circular ring baffle.
14. The inducer end ring of claim 11, wherein:
the airflow space surrounds the outer periphery of the second circumferential wall.
15. The inducer ring of claim 9 or 10, wherein:
the assembling surface is a circular table surface, and the outer diameter of the assembling surface is reduced from the axial outer end to the axial inner end.
16. The inducer ring of claim 9 or 10, wherein:
the flow guide through groove penetrates through the position between the axial outer end and the axial inner end of the first circumferential wall along a straight line.
17. The inducer ring of claim 9 or 10, wherein:
the diversion through groove penetrates between the axial outer end and the axial inner end of the first circumferential wall along a curve.
18. A inducer end ring for an electric machine, comprising:
the first circumferential wall is provided with a first inner circumferential surface facing to the axle center and an outer circumferential surface facing away from the axle center;
the first inner circumferential surface is a flow guide surface, and the outer circumferential surface is an assembly surface;
a plurality of sunken diversion through grooves are formed in the diversion surface, the diversion through grooves extend from the axial inner end of the diversion end ring to the axial outer end of the diversion end ring, and the extending direction of the diversion through grooves is inclined to the axial direction of the first circumferential wall;
the first circumferential wall is provided with a third inner circumferential surface facing the axle center, the first inner circumferential surface and the third inner circumferential surface are sequentially arranged along the axial direction, and the third inner circumferential surface is close to the axial outer end relative to the first inner circumferential surface;
the third inner peripheral surface has a third inner diameter larger than the first inner diameter of the first inner peripheral surface, and a recessed annular step is formed between the third inner peripheral surface and the first inner peripheral surface.
19. The inducer ring of claim 18, wherein:
on the radial projection of the flow guide through groove pointing to the axis, an included angle formed between the flow guide through groove and the axis is 30-60 degrees.
20. The inducer ring of claim 18 or 19, wherein:
an airflow channel is arranged in the flow guide end ring, a first airflow port and a second airflow port are respectively arranged at two extending ends of the airflow channel, the first airflow port is positioned at the axial outer end, and the second airflow port is communicated with the surrounding position of the flow guide surface.
21. The inducer ring of claim 20, wherein:
the guide end ring further comprises a circular ring baffle, the circular ring baffle is sequentially connected with the first circumferential wall along the axial direction, and the circular ring baffle is closer to the axial outer end than the first circumferential wall.
22. The inducer ring of claim 21, wherein:
the airflow channel is arranged in the circular ring baffle.
23. The inducer ring of claim 18 or 19, wherein:
the assembling surface is a circular table surface, and the outer diameter of the assembling surface is reduced from the axial outer end to the axial inner end.
24. The inducer ring of claim 18 or 19, wherein:
the flow guide through groove penetrates through the position between the axial outer end and the axial inner end of the first circumferential wall along a straight line.
25. The inducer ring of claim 18 or 19, wherein:
the diversion through groove penetrates between the axial outer end and the axial inner end of the first circumferential wall along a curve.
26. Motor stator, including stator core and stator winding, stator winding's axial both ends all have the protrusion in winding overhang outside the stator core, its characterized in that:
the axial two ends of the motor stator are provided with one guide end ring, and the guide end ring adopts the guide end ring of any one of the above claims 1 to 25;
in the radial direction of the motor stator, the diversion end ring is arranged adjacent to the winding end part, and the assembling surface is matched with the winding end part.
27. The electric machine stator of claim 26, wherein:
the motor stator is characterized in that two axial ends of the motor stator are respectively provided with a cooling end ring, a refrigerant channel arranged in a surrounding manner is arranged in each cooling end ring, and two extending ends of each refrigerant channel are respectively provided with a refrigerant channel inlet and a refrigerant channel outlet;
in the radial direction of the motor stator, the refrigerant end ring is adjacent to the winding end part, and the refrigerant end ring and the diversion end ring are respectively positioned at two opposite sides of the winding end part.
28. The electric machine stator of claim 27, wherein:
and a plurality of refrigerant channels which are axially arranged are arranged in the cooling end ring.
29. A motor stator according to claim 27 or 28, wherein:
the cooling end ring is provided with a first connector at the inlet of the refrigerant channel, the refrigerant end ring is provided with a second connector at the outlet of the refrigerant channel, and the first connector and the second connector are arranged adjacently;
and heat insulation gaps are formed between the first connector and the winding end part and between the second connector and the winding end part.
30. A motor stator according to claim 27 or 28, wherein:
the motor stator further comprises a positioning ring, and the positioning ring is arranged between the stator core and the cooling end ring;
the positioning ring is provided with a first positioning part, the cooling end ring is provided with a second positioning part, and the first positioning part is matched with the second positioning part;
one of the first positioning portion and the second positioning portion is a positioning opening arranged along the axial direction, and the other of the first positioning portion and the second positioning portion is a positioning protrusion arranged along the axial direction.
31. A motor stator according to claim 27 or 28, wherein:
the cross section of the refrigerant channel is polygonal.
32. The electric machine stator of claim 31, wherein:
the section of the refrigerant channel is in a diamond shape.
33. The motor comprises a motor stator and a motor rotor, wherein an air gap is formed between the motor stator and the motor rotor;
the method is characterized in that:
the motor stator adopts the motor stator of any one of the claims 26 to 32, the flow guide surface faces the motor rotor and an air flow gap is formed between the flow guide surface and the motor rotor, and the air flow gap is communicated with the air gap.
34. A household appliance comprising an electric motor employing the electric motor of claim 33 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910639380.6A CN110311511B (en) | 2019-07-16 | 2019-07-16 | Diversion end ring of motor, motor stator, motor and household appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639380.6A CN110311511B (en) | 2019-07-16 | 2019-07-16 | Diversion end ring of motor, motor stator, motor and household appliance |
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| CN110311511A CN110311511A (en) | 2019-10-08 |
| CN110311511B true CN110311511B (en) | 2020-06-05 |
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| CN201910639380.6A Active CN110311511B (en) | 2019-07-16 | 2019-07-16 | Diversion end ring of motor, motor stator, motor and household appliance |
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| CN110912299A (en) * | 2019-12-24 | 2020-03-24 | 苏州苏磁智能科技有限公司 | Air gap heat radiation structure of high-speed motor |
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| WO2002071577A1 (en) * | 2001-03-07 | 2002-09-12 | Hitachi, Ltd. | Rotary electric machinery |
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| DE102013016066A1 (en) * | 2013-09-27 | 2015-04-02 | Robert Bosch Gmbh | Cooling device for cooling winding heads of a coil of an electric machine and electric machine |
| DE102014207468A1 (en) * | 2014-04-17 | 2015-10-22 | Zf Friedrichshafen Ag | Cooling for a winding head of an electric machine |
| CN107659018A (en) * | 2017-09-30 | 2018-02-02 | 天津大学 | A kind of detachable heat pipe cooling structure for strengthening the cooling of motor end |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002071577A1 (en) * | 2001-03-07 | 2002-09-12 | Hitachi, Ltd. | Rotary electric machinery |
| CN102384101A (en) * | 2010-08-26 | 2012-03-21 | 哈米尔顿森德斯特兰德公司 | Compressor bearing cooling inlet plate |
| DE102013016066A1 (en) * | 2013-09-27 | 2015-04-02 | Robert Bosch Gmbh | Cooling device for cooling winding heads of a coil of an electric machine and electric machine |
| DE102014207468A1 (en) * | 2014-04-17 | 2015-10-22 | Zf Friedrichshafen Ag | Cooling for a winding head of an electric machine |
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| CN110311511A (en) | 2019-10-08 |
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