WO2021037193A1 - 一种用于改善定子轴向温度分布均匀性的方法及装置 - Google Patents

一种用于改善定子轴向温度分布均匀性的方法及装置 Download PDF

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Publication number
WO2021037193A1
WO2021037193A1 PCT/CN2020/112044 CN2020112044W WO2021037193A1 WO 2021037193 A1 WO2021037193 A1 WO 2021037193A1 CN 2020112044 W CN2020112044 W CN 2020112044W WO 2021037193 A1 WO2021037193 A1 WO 2021037193A1
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WIPO (PCT)
Prior art keywords
stator
core
axial
rotor
ring plate
Prior art date
Application number
PCT/CN2020/112044
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English (en)
French (fr)
Inventor
王超
周光厚
廖毅刚
Original Assignee
东方电气集团东方电机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201910813304.2A external-priority patent/CN110460180B/zh
Priority claimed from CN201910813645.XA external-priority patent/CN110504771B/zh
Application filed by 东方电气集团东方电机有限公司 filed Critical 东方电气集团东方电机有限公司
Priority to EP20856765.1A priority Critical patent/EP4007124A4/en
Publication of WO2021037193A1 publication Critical patent/WO2021037193A1/zh

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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
    • 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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the invention relates to the technical field of generators, and in particular to a method and device for improving the uniformity of the axial temperature distribution of the stator.
  • the flow space is usually limited due to the electromagnetic design of the motor.
  • the air flow is continuously separated or separated along the axial direction of the air gap. Convergence makes the pressure change in the air gap space very complicated. Specifically, for the positive flow, due to the continuous separation of the air flow, the dynamic pressure continues to decrease, the static pressure continues to increase, and the pressure difference between the air gap and the back of the wind channel increases. As a result, the velocity in the stator duct gradually increases along the direction of flow. For counterflow, due to the continuous convergence of the airflow, the dynamic pressure gradually increases, the static pressure gradually decreases, and the pressure difference between the back of the duct and the air gap will gradually increase along the flow direction. The flow of the stator duct will also gradually increase.
  • the stator side core adopts a stepped tooth structure, that is, the inner diameter of the end sections of the core is made larger than the other sections, thereby increasing the air gap flow area and reducing the maximum air gap speed, thereby improving the stator
  • the side core structure plays a vital role in the axial compression of the core section, and the stepped tooth structure of the side section core will affect the degree of core compression Negative Effects.
  • the publication number is CN 207559785U, and the publication date is June 29, 2018.
  • the Chinese patent document discloses a stator with ventilation slots.
  • the motor includes a base, a stator and a rotor.
  • the outer surface of the stator is provided with a radial In the stator wind channel, coils and slot wedges are installed in the punching cavity of the stator, characterized in that: the slot wedge and the inner ring surface of the stator are provided with a slot wedge gap, and one side of the base is provided with an air inlet and At the air outlet, a stator pressing plate is installed at the end of the stator, the stator pressing plate is fixedly connected to the base, a plurality of ventilation holes are arranged on the stator pressing plate, and an annular plate is arranged between the end of the rotor and the base, The annular plate, the stator and the stator pressure plate divide the inner cavity of the base into a diversion cavity I and a diversion cavity II.
  • the motor with a stator with ventilation slots disclosed in this patent document can increase the axial ventilation inside the motor, but the axial wind speed of the stator wind channel is uneven, and thus cannot effectively reduce the axial temperature difference between the stator coil and the iron core.
  • the present invention provides a method for improving the uniformity of the axial temperature distribution of the stator.
  • the present invention can maintain the static pressure difference at a constant value, the axial wind speed of the stator duct is relatively uniform, and the operation is simple. It is easy to adjust, can effectively reduce the axial temperature difference between the stator coil and the iron core, and ensure the reliability and stability of the generator.
  • a method for improving the uniformity of the axial temperature distribution of the stator which is characterized in that it comprises the following steps:
  • stator pressure plate 1 Install and arrange the stator pressure plate 1, the stator pressure plate 2, the axial ring plate, the circumferential ring plate and the stator core of the stator axial temperature distribution uniformity device, and set the angle between the circumferential ring plate and the axial ring plate to be 85-95 °, forming the back space of the stator core;
  • the stator axial temperature distribution uniformity device includes a rotor core and a rotor frame.
  • the rotor core is installed on the rotor frame.
  • a plurality of rotor magnets are fixed on the rotor core, and the plurality of rotor magnets are arranged along the axial direction of the rotor core.
  • the arrangement also includes a stator core, a stator pressure plate, a stator pressure plate, a through-core screw and an axial ring plate.
  • the stator core includes a plurality of core segments, and a stator wind trench is provided between any two adjacent core segments.
  • the multiple core segments are connected by a through-core screw, one end of the through-core screw is fixedly connected to the stator pressure plate one, and the other end is fixedly connected to the stator pressure plate two, and an axial ring plate is fixedly connected between the stator pressure plate one and the stator pressure plate two.
  • a circumferential ring plate is fixedly connected to the core segment, the circumferential ring plate is fixedly connected to the axial ring plate, a stator and rotor gap is provided between the stator core and the rotor core, the stator pressure plate one, the stator pressure plate two, the shaft
  • the ring plate and the stator core enclose the space on the back of the stator core.
  • the iron core segment includes a plurality of iron core punching pieces, which are alternately stacked to form the iron core segment, and the iron core punching pieces are provided with grooves for placing stator coils.
  • the radial distance between the axial ring plate and the core segment is the same as the width of the stator-rotor gap.
  • a ventilation channel is opened on the end of the corresponding core section of the axial ring plate, and the ventilation channel is used for air flow into or out of the motor.
  • the axial ring plate is cylindrical.
  • the axial ring plate is in the shape of a truncated cone with a small end and a large middle.
  • the axial ring plate is in the shape of a circular truncated cone with a large end and a small middle.
  • a device for improving the uniformity of the axial temperature distribution of the stator comprising a rotor core and a rotor frame.
  • the rotor core is installed on the rotor frame.
  • the rotor core is fixed with a plurality of rotor magnets, and a plurality of rotor magnets are along the rotor.
  • the axial arrangement of the iron core is characterized in that it also includes a stator iron core, a stator pressing plate one, a stator pressing plate two, a core screw and an axial ring plate.
  • the stator iron core includes a plurality of iron core segments, and any two adjacent iron core segments A stator wind channel is arranged between the plurality of core segments, and the core segments are connected by a through-core screw.
  • stator pressure plate one One end of the through-core screw is fixedly connected to the stator pressure plate one, and the other end is fixedly connected to the stator pressure plate two.
  • An axial ring plate is fixedly connected therebetween, a circumferential ring plate is fixedly connected to the core section, the circumferential ring plate is fixedly connected to the axial ring plate, a stator and rotor gap is provided between the stator core and the rotor core, the The stator pressure plate one, the stator pressure plate two, the axial ring plate and the stator core enclose the space on the back of the stator core.
  • the iron core segment includes a plurality of iron core punching pieces, which are alternately stacked to form the iron core segment, and the iron core punching pieces are provided with grooves for placing stator coils.
  • the radial distance between the axial ring plate and the core segment is the same as the width of the stator-rotor gap.
  • a ventilation channel is opened on the end of the corresponding core section of the axial ring plate, and the ventilation channel is used for air flow into or out of the motor.
  • the included angle between the circumferential ring plate and the axial ring plate is 85-95°.
  • the axial ring plate is cylindrical.
  • the axial ring plate is in the shape of a truncated cone with a small end and a large middle.
  • the axial ring plate is in the shape of a circular truncated cone with a large end and a small middle.
  • the present invention "a. Install the stator axial temperature distribution uniformity device on the wind generator; b. Install the stator pressure plate of the stator axial temperature distribution uniformity device 1. Stator pressure plate 2. Axial ring plate, circumferential ring Set the angle between the circumferential ring plate and the axial ring plate to be 85-95° between the plate and the stator core to form the back space of the stator core; c.
  • the static pressure difference can be maintained at a constant value, the axial wind speed of the stator duct is relatively uniform, the operation is simple, easy to adjust, and it can effectively reduce the stator coil and
  • the axial temperature difference of the iron core ensures the reliability and stability of the generator.
  • the stator core includes a plurality of core segments, a stator wind groove is arranged between any two adjacent core segments, the plurality of core segments are connected by a through-core screw, and one end of the through-core screw is fixedly connected with the stator pressure plate. The other end is fixedly connected to the second stator pressing plate, the axial ring plate is fixedly connected between the stator pressing plate 1 and the stator pressing plate 2, the circumferential ring plate is fixedly connected to the core section, the circumferential ring plate is fixedly connected with the axial ring plate, the stator core and the rotor core There is a gap between the stator and rotor.
  • the stator pressure plate 1, the stator pressure plate 2, the axial ring plate and the stator core enclose the space on the back of the stator core.
  • the stator-rotor gap between the rotor cores is provided with a comparable flow space, so that the airflow in the stator-rotor gap and the stator core back space at the same axial position has the same flow and opposite flow characteristics, achieving the stator-rotor gap and the stator core back space.
  • the dynamic pressure at the same axial position is approximately equal, the static pressure difference is maintained at a constant value, and the axial wind speed of the stator duct is relatively uniform, so as to provide favorable conditions for the axial uniform distribution of the stator coil and iron core temperature.
  • the whole device has a positive effect on the motor body.
  • the structure design has no influence, and the structure is simple, easy to implement, convenient to adjust, and can effectively reduce the axial temperature difference of the motor by 10-15K.
  • the iron core segment includes a plurality of iron core punching pieces, which are alternately stacked to form the iron core segment.
  • the iron core punching pieces are provided with grooves for placing stator coils, which is simple to manufacture, easy to implement, and maintenance and replacement costs. low.
  • the radial distance between the axial ring plate and the iron core segment is the same as the width of the stator-rotor gap. Under the condition of ensuring uniform heat dissipation of the stator coil and the iron core, the entire device structure can be made more compact and occupy a small space.
  • the end of the axial ring plate corresponding to the core section is provided with a ventilation channel.
  • the ventilation channel is used for air flow into or out of the motor, which can further improve the ventilation effect and make the heat dissipation more uniform.
  • the included angle between the circumferential ring plate and the axial ring plate is 85-95°.
  • the axial ring plate is cylindrical, which not only can ensure good heat dissipation effect, but also has a simple structure and is easy to manufacture, and can reduce the temperature rise of the motor to 10K.
  • the axial ring plate is in the shape of a circular truncated cone with a small end and a large middle, which can further improve the heat dissipation effect and significantly reduce the axial temperature difference of the motor to 10-15K.
  • the axial ring plate is in the shape of a circular truncated cone with a large end and a small middle, which can reduce the axial temperature difference of the motor to 10-15K, and has an excellent heat dissipation effect.
  • Figure 1 is a schematic structural diagram of a device for uniformity of axial temperature distribution of a stator according to the present invention
  • Figure 2 is a schematic diagram of the structure of the core section of the present invention.
  • a method for improving the uniformity of the axial temperature distribution of the stator includes the following steps:
  • stator pressing plate 5 Install the stator pressing plate 5, stator pressing plate 2 6, the axial ring plate 8, the circumferential ring plate 11 and the stator core 4 of the stator axial temperature distribution uniformity device, and connect the circumferential ring plate 11 and the axial ring plate 8.
  • the included angle is set at 85°, forming a space 13 on the back of the stator core;
  • a method for improving the uniformity of the axial temperature distribution of the stator includes the following steps:
  • stator pressing plate 5 Install the stator pressing plate 5, stator pressing plate 2 6, the axial ring plate 8, the circumferential ring plate 11 and the stator core 4 of the stator axial temperature distribution uniformity device, and connect the circumferential ring plate 11 and the axial ring plate 8.
  • the included angle is set at 90°, forming a space 13 on the back of the stator core;
  • a method for improving the uniformity of the axial temperature distribution of the stator includes the following steps:
  • stator pressing plate 5 Install the stator pressing plate 5, stator pressing plate 2 6, the axial ring plate 8, the circumferential ring plate 11 and the stator core 4 of the stator axial temperature distribution uniformity device, and connect the circumferential ring plate 11 and the axial ring plate 8.
  • the included angle is set at 95°, forming a space 13 on the back of the stator core;
  • a method for improving the uniformity of the axial temperature distribution of the stator includes the following steps:
  • stator pressing plate 5 Install the stator pressing plate 5, stator pressing plate 2 6, the axial ring plate 8, the circumferential ring plate 11 and the stator core 4 of the stator axial temperature distribution uniformity device, and connect the circumferential ring plate 11 and the axial ring plate 8.
  • the included angle is set at 85°, forming a space 13 on the back of the stator core;
  • the stator axial temperature distribution uniformity device includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is mounted on the rotor frame 2, and the rotor core 1 is fixed with a plurality of rotor magnets 3, and a plurality of rotor magnets 3 Arranged along the axial direction of the rotor core 1, it also includes a stator core 4, a stator pressure plate 5, a stator pressure plate 6, a through-core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, any A stator wind trench 10 is provided between two adjacent core segments 9. The plurality of core segments 9 are connected by a through-core screw 7.
  • stator pressing plate 5 One end of the through-core screw 7 is fixedly connected to the stator pressing plate 5, and the other end is connected to the stator pressing plate 2.
  • an axial ring plate 8 is fixedly connected between the stator pressing plate 5 and the stator pressing plate 2 6
  • a circumferential ring plate 11 is fixedly connected to the iron core section 9, and the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected.
  • a stator-rotor gap 12 is provided between the stator core 4 and the rotor core 1, and the stator pressure plate one 5, the stator pressure plate two 6, the axial ring plate 8 and the stator core 4 enclose a stator core back space 13.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the axial ring plate 8 is in the shape of a circular truncated cone with a large end and a small middle.
  • the stator core includes a plurality of core segments. A stator wind groove is arranged between any two adjacent core segments.
  • the plurality of core segments are connected by a through-core screw. One end of the through-core screw is fixedly connected to the stator pressure plate, and the other end is connected to the stator pressure plate.
  • Two fixed connection, the stator pressing plate 1 and the stator pressing plate 2 are fixedly connected with an axial ring plate, the iron core section is fixedly connected with a circumferential ring plate, the circumferential ring plate is fixedly connected with the axial ring plate, and a stator core is arranged between the stator core and the rotor core.
  • the rotor gap, the stator pressure plate 1, the stator pressure plate 2, the axial ring plate and the stator core enclose the back space of the stator core.
  • the stator-rotor gap can be compared to the flow space, so that the airflow in the stator-rotor gap and the back space of the stator core has the same flow at the same axial position, and the flow direction is opposite.
  • the pressure is kept approximately equal, the static pressure difference is maintained at a fixed value, and the axial wind speed of the stator duct is relatively uniform, so as to provide favorable conditions for the axial uniform distribution of the stator coil and iron core temperature.
  • the entire device does not affect the structure design of the motor body. , And the structure is simple, easy to implement, convenient to adjust, and can effectively reduce the axial temperature difference of the motor by 10-15K.
  • the iron core segment includes a plurality of iron core punching pieces, which are alternately stacked to form the iron core segment.
  • the iron core punching pieces are provided with grooves for placing stator coils, which are simple to manufacture, easy to implement, and low in maintenance and replacement costs.
  • the axial ring plate is in the shape of a circular truncated cone with a large end and a small middle, which can reduce the axial temperature difference of the motor to 10-15K, and has an excellent heat dissipation effect.
  • a method for improving the uniformity of the axial temperature distribution of the stator includes the following steps:
  • stator pressing plate 5 Install the stator pressing plate 5, stator pressing plate 2 6, the axial ring plate 8, the circumferential ring plate 11 and the stator core 4 of the stator axial temperature distribution uniformity device, and connect the circumferential ring plate 11 and the axial ring plate 8.
  • the included angle is set at 90°, forming a space 13 on the back of the stator core;
  • the stator axial temperature distribution uniformity device includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is mounted on the rotor frame 2, and the rotor core 1 is fixed with a plurality of rotor magnets 3, and a plurality of rotor magnets 3 Arranged along the axial direction of the rotor core 1, it also includes a stator core 4, a stator pressure plate 5, a stator pressure plate 6, a through-core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, any A stator wind trench 10 is provided between two adjacent core segments 9. The plurality of core segments 9 are connected by a through-core screw 7.
  • stator pressing plate 5 One end of the through-core screw 7 is fixedly connected to the stator pressing plate 5, and the other end is connected to the stator pressing plate 2.
  • an axial ring plate 8 is fixedly connected between the stator pressing plate 5 and the stator pressing plate 2 6
  • a circumferential ring plate 11 is fixedly connected to the iron core section 9, and the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected.
  • a stator-rotor gap 12 is provided between the stator core 4 and the rotor core 1, and the stator pressure plate one 5, the stator pressure plate two 6, the axial ring plate 8 and the stator core 4 enclose a stator core back space 13.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the radial distance between the axial ring plate 8 and the core segment 9 is the same as the width of the stator-rotor gap 12.
  • the axial ring plate 8 is cylindrical.
  • the radial distance between the axial ring plate and the iron core segment is the same as the width of the stator-rotor gap. Under the condition of ensuring uniform heat dissipation of the stator coil and the iron core, the entire device structure can be made more compact and occupy less space.
  • the axial ring plate is cylindrical, which not only guarantees good heat dissipation effect, but also has a simple structure and is easy to manufacture, which can reduce the temperature rise of the motor to 10K.
  • a method for improving the uniformity of the axial temperature distribution of the stator includes the following steps:
  • stator pressing plate 5 Install the stator pressing plate 5, stator pressing plate 2 6, the axial ring plate 8, the circumferential ring plate 11 and the stator core 4 of the stator axial temperature distribution uniformity device, and connect the circumferential ring plate 11 and the axial ring plate 8.
  • the included angle is set at 95°, forming a space 13 on the back of the stator core;
  • the stator axial temperature distribution uniformity device includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is installed on the rotor frame 2, and the rotor core 1 is fixed with a plurality of rotor magnets 3, and a plurality of rotor magnets 3 Arranged along the axial direction of the rotor core 1, it also includes a stator core 4, a stator pressure plate 5, a stator pressure plate 6, a through-core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, any A stator wind trench 10 is provided between two adjacent core segments 9. The plurality of core segments 9 are connected by a through-core screw 7.
  • stator pressing plate 5 One end of the through-core screw 7 is fixedly connected to the stator pressing plate 5, and the other end is connected to the stator pressing plate 2.
  • an axial ring plate 8 is fixedly connected between the stator pressing plate 5 and the stator pressing plate 2 6
  • a circumferential ring plate 11 is fixedly connected to the core section 9, and the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected.
  • a stator-rotor gap 12 is provided between the stator core 4 and the rotor core 1, and the stator pressure plate one 5, the stator pressure plate two 6, the axial ring plate 8 and the stator core 4 enclose a stator core back space 13.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the radial distance between the axial ring plate 8 and the core segment 9 is the same as the width of the stator-rotor gap 12.
  • the end of the axial ring plate 8 corresponding to the core section 9 is provided with a ventilation channel, and the ventilation channel is used for air flow into or out of the motor.
  • the axial ring plate 8 is in the shape of a truncated cone with a small end and a large middle.
  • the axial ring plate is in the shape of a circular truncated cone with a small end and a large middle, which can further improve the heat dissipation effect and significantly reduce the axial temperature difference of the motor to 10-15K.
  • a device for improving the uniformity of the axial temperature distribution of the stator includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is installed on the rotor frame 2, and the rotor core 1 is fixed with many A rotor magnet 3, a plurality of rotor magnets 3 are arranged along the axial direction of the rotor core 1, and also includes a stator core 4, a stator pressing plate 5, a stator pressing plate 6, a core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, a stator wind groove 10 is arranged between any two adjacent core segments 9, and the plurality of core segments 9 are connected by a core screw 7, and one end of the core screw 7 is connected to the stator
  • the pressure plate one 5 is fixedly connected, and the other end is fixedly connected to the stator pressure plate two 6.
  • An axial ring plate 8 is fixedly connected between the stator pressure plate 5 and the stator pressure plate 6, and a circumferential ring plate 11 is fixedly connected to the core section 9 ,
  • the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected, the stator core 4 and the rotor core 1 are provided with a stator and rotor gap 12, the stator pressing plate one 5, the stator pressing plate two 6, and the axial ring plate 8
  • the stator core 4 and the stator core 4 enclose a space 13 on the back of the stator core.
  • a device for improving the uniformity of the axial temperature distribution of the stator includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is installed on the rotor frame 2, and the rotor core 1 is fixed with many A rotor magnet 3, a plurality of rotor magnets 3 are arranged along the axial direction of the rotor core 1, and also includes a stator core 4, a stator pressing plate 5, a stator pressing plate 6, a core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, a stator wind groove 10 is arranged between any two adjacent core segments 9, and the plurality of core segments 9 are connected by a core screw 7, and one end of the core screw 7 is connected to the stator
  • the pressure plate one 5 is fixedly connected, and the other end is fixedly connected to the stator pressure plate two 6.
  • An axial ring plate 8 is fixedly connected between the stator pressure plate 5 and the stator pressure plate 6, and a circumferential ring plate 11 is fixedly connected to the core section 9 ,
  • the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected, the stator core 4 and the rotor core 1 are provided with a stator and rotor gap 12, the stator pressing plate one 5, the stator pressing plate two 6, and the axial ring plate 8
  • the stator core 4 and the stator core 4 enclose a space 13 on the back of the stator core.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the radial distance between the axial ring plate 8 and the core segment 9 is the same as the width of the stator-rotor gap 12.
  • the end of the axial ring plate 8 corresponding to the core section 9 is provided with a ventilation channel, and the ventilation channel is used for air flow into or out of the motor.
  • a device for improving the uniformity of the axial temperature distribution of the stator includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is installed on the rotor frame 2, and the rotor core 1 is fixed with many A rotor magnet 3, a plurality of rotor magnets 3 are arranged along the axial direction of the rotor core 1, and also includes a stator core 4, a stator pressing plate 5, a stator pressing plate 6, a core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, a stator wind groove 10 is arranged between any two adjacent core segments 9, and the plurality of core segments 9 are connected by a core screw 7, and one end of the core screw 7 is connected to the stator
  • the pressure plate one 5 is fixedly connected, and the other end is fixedly connected to the stator pressure plate two 6.
  • An axial ring plate 8 is fixedly connected between the stator pressure plate 5 and the stator pressure plate 6, and a circumferential ring plate 11 is fixedly connected to the core section 9 ,
  • the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected, the stator core 4 and the rotor core 1 are provided with a stator and rotor gap 12, the stator pressing plate one 5, the stator pressing plate two 6, and the axial ring plate 8
  • the stator core 4 and the stator core 4 enclose a space 13 on the back of the stator core.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the radial distance between the axial ring plate 8 and the core segment 9 is the same as the width of the stator-rotor gap 12.
  • the end of the axial ring plate 8 corresponding to the core section 9 is provided with a ventilation channel, and the ventilation channel is used for air flow into or out of the motor.
  • the included angle between the circumferential ring plate 11 and the axial ring plate 8 is 85°.
  • the axial ring plate 8 is in the shape of a circular truncated cone with a large end and a small middle.
  • a device for improving the uniformity of the axial temperature distribution of the stator includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is installed on the rotor frame 2, and the rotor core 1 is fixed with many A rotor magnet 3, a plurality of rotor magnets 3 are arranged along the axial direction of the rotor core 1, and also includes a stator core 4, a stator pressing plate 5, a stator pressing plate 6, a core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, a stator wind groove 10 is arranged between any two adjacent core segments 9, and the plurality of core segments 9 are connected by a core screw 7, and one end of the core screw 7 is connected to the stator
  • the pressure plate one 5 is fixedly connected, and the other end is fixedly connected to the stator pressure plate two 6.
  • An axial ring plate 8 is fixedly connected between the stator pressure plate 5 and the stator pressure plate 6, and a circumferential ring plate 11 is fixedly connected to the core section 9 ,
  • the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected, the stator core 4 and the rotor core 1 are provided with a stator and rotor gap 12, the stator pressing plate one 5, the stator pressing plate two 6, and the axial ring plate 8
  • the stator core 4 and the stator core 4 enclose a space 13 on the back of the stator core.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the radial distance between the axial ring plate 8 and the core segment 9 is the same as the width of the stator-rotor gap 12.
  • the end of the axial ring plate 8 corresponding to the core section 9 is provided with a ventilation channel, and the ventilation channel is used for air flow into or out of the motor.
  • the included angle between the circumferential ring plate 11 and the axial ring plate 8 is 90°.
  • the axial ring plate 8 is cylindrical.
  • a device for improving the uniformity of the axial temperature distribution of the stator includes a rotor core 1 and a rotor frame 2.
  • the rotor core 1 is installed on the rotor frame 2, and the rotor core 1 is fixed with many A rotor magnet 3, a plurality of rotor magnets 3 are arranged along the axial direction of the rotor core 1, and also includes a stator core 4, a stator pressing plate 5, a stator pressing plate 6, a core screw 7 and an axial ring plate 8.
  • the stator core 4 includes a plurality of core segments 9, a stator wind groove 10 is arranged between any two adjacent core segments 9, and the plurality of core segments 9 are connected by a core screw 7, and one end of the core screw 7 is connected to the stator
  • the pressure plate one 5 is fixedly connected, and the other end is fixedly connected to the stator pressure plate two 6.
  • An axial ring plate 8 is fixedly connected between the stator pressure plate 5 and the stator pressure plate 6, and a circumferential ring plate 11 is fixedly connected to the core section 9 ,
  • the circumferential ring plate 11 and the axial ring plate 8 are fixedly connected, the stator core 4 and the rotor core 1 are provided with a stator and rotor gap 12, the stator pressing plate one 5, the stator pressing plate two 6, and the axial ring plate 8
  • the stator core 4 and the stator core 4 enclose a space 13 on the back of the stator core.
  • the iron core segment 9 includes a plurality of iron core punching pieces 14 which are alternately stacked to form the iron core segment 9.
  • the iron core punching pieces 14 are provided with grooves 15 for placing stator coils.
  • the radial distance between the axial ring plate 8 and the core segment 9 is the same as the width of the stator-rotor gap 12.
  • the end of the axial ring plate 8 corresponding to the core section 9 is provided with a ventilation channel, and the ventilation channel is used for air flow into or out of the motor.
  • the included angle between the circumferential ring plate 11 and the axial ring plate 8 is 95°.
  • the axial ring plate 8 is in the shape of a truncated cone with a small end and a large middle.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

本发明公开了一种用于改善定子轴向温度分布均匀性的方法及装置，属于发电机技术领域，其特征在于，包括以下步骤：a、将定子轴向温度分布均匀性装置安装到风力发电机上；b、安装布置定子轴向温度分布均匀性装置的定子压板一、定子压板二、轴向环板、周向环板和定子铁心，将周向环板和轴向环板之间的夹角设置呈85-95°，形成定子铁心背部空间；c、将定子铁心背部空间流通的气流设置成与定转子间隙流通的气流在同一轴向位置流量相同且流向相反。本发明能够使静压差维持定值，定子风沟轴向风速相对均匀，操作简单，易于调节，能够有效减小定子线圈和铁心轴向温差，保障发电机使用可靠性和稳定性。

Description

一种用于改善定子轴向温度分布均匀性的方法及装置 技术领域
本发明涉及到发电机技术领域，尤其涉及一种用于改善定子轴向温度分布均匀性的方法及装置。
背景技术
对于大型旋转电机，定子上布置一定数量的通风沟用于冷却定子线圈和铁心是一种非常常见的冷却方式。与其他结构相配合，可以形成不同的流动方式。其中，气流从气隙分流至定子风沟，与电机中绝大多数情况流动相同，称为正流；气流从定子风沟汇流至气隙，与电机中绝大多数情况流动相反，称为逆流。
对于电机实际结构，风沟背部一般空间较大，可以认为压力保持不变，而对于气隙，通常受制于电机电磁设计会导致该流动空间十分有限，由于气流沿气隙轴向的不断分离或汇聚，使得气隙空间内压力变化十分复杂，具体来说，对于正流，由于气流的不断分离，动压不断减小，静压不断增加，气隙-风沟背部压差随之增加，会使得定子风沟内速度沿着流动方向逐渐增加，而对于逆流，由于气流的不断汇合，动压逐渐增加，静压逐渐降低，风沟背部-气隙压差也会逐渐增加使得沿着流动方向定子风沟流量也会逐渐增加。
研究表明：无论是正流方式还是逆流方式，只要气隙最大合速度达到30m/s以上就很容易造成定子风沟内速度分布不均，使得定子线圈或铁心轴向存在较大的温差。目前主要技术解决方案为定子边段铁心采用阶梯齿结构，也就是将靠端部几段铁心内径做的比其它段大，从而增加气隙过流面积，减小气隙最大速度，从而改善定子风沟风速和线圈、铁心温度轴向分布的均匀性，但是，边段铁心结构对铁心段轴向压紧起着至关重要的作用，边段铁心设置阶梯齿结构会对铁心压紧程度产生不利影响。
公开号为CN 207559785U，公开日为2018年06月29日的中国专利文献公开了一种定子带通风槽口的电机，包括机座、定子和转子，所述定子的外表面设有径向的定子风沟，定子的冲片空腔内安装有线圈和槽楔，其特征在于：所述槽楔与定子的内环面设有槽楔间隙，所述机座的一侧设有进风口和出风口，所述定子的端部安装有定子压板，所述定子压板与机座固定连接，定子压板上设有多个通风孔，所述转子的端部与机座之间设有 环形板，所述环形板、定子和定子压板将机座的内腔分成导流腔体I和导流腔体II，所述导流腔体I与导流腔体II通过通风孔、定子风沟、定转子气隙和槽楔间隙连通。
该专利文献公开的定子带通风槽口的电机，虽然能够增大电机内部的轴向通风量，但是，定子风沟轴向风速不均匀，进而不能有效减小定子线圈和铁心轴向温差。
发明内容
本发明为了克服上述现有技术的缺陷，提供一种用于改善定子轴向温度分布均匀性的方法，本发明能够使静压差维持定值，定子风沟轴向风速相对均匀，操作简单，易于调节，能够有效减小定子线圈和铁心轴向温差，保障发电机使用可靠性和稳定性。
本发明通过下述技术方案实现：
一种用于改善定子轴向温度分布均匀性的方法，其特征在于，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一、定子压板二、轴向环板、周向环板和定子铁心，将周向环板和轴向环板之间的夹角设置呈85-95°，形成定子铁心背部空间；
c、将定子铁心背部空间流通的气流设置成与定转子间隙流通的气流在同一轴向位置流量相同且流向相反。
所述定子轴向温度分布均匀性装置包括转子铁心和转子机座，转子铁心安装在转子机座上，转子铁心上固定有多个转子磁钢，多个转子磁钢沿转子铁心的轴向排列布置，还包括定子铁心、定子压板一、定子压板二、穿心螺杆和轴向环板，所述定子铁心包括多个铁心段，任意两个相邻铁心段之间设置有定子风沟，所述多个铁心段通过穿心螺杆连接，穿心螺杆的一端与定子压板一固定连接，另一端与定子压板二固定连接，所述定子压板一和定子压板二之间固定连接有轴向环板，所述铁心段上固定连接有周向环板，所述周向环板与轴向环板固定连接，所述定子铁心和转子铁心之间设置有定转子间隙，所述定子压板一、定子压板二、轴向环板和定子铁心围成定子铁心背部空间。
所述铁心段包括多个铁心冲片，多个铁心冲片交替叠装形成所述铁心段，铁心冲片上开有用于放置定子线圈的凹槽。
所述轴向环板与铁心段的径向距离和定转子间隙的宽度相同。
所述轴向环板上对应铁心段的端部开有通风流道，通风流道用于气流流入或流出电机。
所述轴向环板为圆柱筒状。
所述轴向环板为端部小、中间大的圆台形状。
所述轴向环板为端部大、中间小的圆台形状。
一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心和转子机座，转子铁心安装在转子机座上，转子铁心上固定有多个转子磁钢，多个转子磁钢沿转子铁心的轴向排列布置，其特征在于：还包括定子铁心、定子压板一、定子压板二、穿心螺杆和轴向环板，所述定子铁心包括多个铁心段，任意两个相邻铁心段之间设置有定子风沟，所述多个铁心段通过穿心螺杆连接，穿心螺杆的一端与定子压板一固定连接，另一端与定子压板二固定连接，所述定子压板一和定子压板二之间固定连接有轴向环板，所述铁心段上固定连接有周向环板，所述周向环板与轴向环板固定连接，所述定子铁心和转子铁心之间设置有定转子间隙，所述定子压板一、定子压板二、轴向环板和定子铁心围成定子铁心背部空间。
所述铁心段包括多个铁心冲片，多个铁心冲片交替叠装形成所述铁心段，铁心冲片上开有用于放置定子线圈的凹槽。
所述轴向环板与铁心段的径向距离和定转子间隙的宽度相同。
所述轴向环板上对应铁心段的端部开有通风流道，通风流道用于气流流入或流出电机。
所述周向环板和轴向环板之间的夹角为85-95°。
所述轴向环板为圆柱筒状。
所述轴向环板为端部小、中间大的圆台形状。
所述轴向环板为端部大、中间小的圆台形状。
本发明的有益效果主要表现在以下方面：
一、本发明，“a、将定子轴向温度分布均匀性装置安装到风力发电机上；b、安装布置定子轴向温度分布均匀性装置的定子压板一、定子压板二、轴向环板、周向环板和定子铁心，将周向环板和轴向环板之间的夹角设置呈85-95°，形成定子铁心背部空间；c、将定子铁心背部空间流通的气流设置成与定转子间隙流通的气流在同一轴向位置流量相同且流向相反”，较现有技术而言，能够使静压差维持定值，定子风沟轴向风速相对均匀，操作简单，易于调节，能够有效减小定子线圈和铁心轴向温差，保障发电机使用可靠性和稳定性。
二、本发明，定子铁心包括多个铁心段，任意两个相邻铁心段之间设置有定子风沟，多个铁心段通过穿心螺杆连接，穿心螺杆的一端与定子压板一固定连接，另一端与定子压板二固定连接，定子压板一和定子压板二之间固定连接有轴向环板，铁心段上固定连接有周向环板，周向环板与轴向环板固定连接，定子铁心和转子铁心之间设置有定转子间隙，定子压板一、定子压板二、轴向环板和定子铁心围成定子铁心背部空间，采用这种 特定结构，使用时，能够使得定子铁心背部空间成与定子铁心和转子铁心之间设置的定转子间隙可类比的流动空间，进而使得气流在定转子间隙和定子铁心背部空间在同一轴向位置具有流量相同，流向相反的特性，达到定转子间隙和定子铁心背部空间同一轴向位置动压大小保持近似相等，静压差维持定值，定子风沟轴向风速相对均匀的目的，从而为定子线圈和铁心温度的轴向均匀分布提供有利条件，整个装置对电机本体结构设计不产生影响，且结构简单、易于实施，方便调节，能够有效降低电机轴向温差10-15K。
三、本发明，铁心段包括多个铁心冲片，多个铁心冲片交替叠装形成所述铁心段，铁心冲片上开有用于放置定子线圈的凹槽，制造简单，易于实施，维护更换成本低。
四、本发明，轴向环板与铁心段的径向距离和定转子间隙的宽度相同，在保障对定子线圈和铁心进行均匀散热的情况下，能够使整个装置结构更加紧凑，占用空间小。
五、本发明，轴向环板上对应铁心段的端部开有通风流道，通风流道用于气流流入或流出电机，能够进一步提高通风效果，散热更均匀。
六、本发明，周向环板和轴向环板之间的夹角为85-95°，采用这种特定的布置方式，能够更好的达到定转子间隙和定子铁心背部空间同一轴向位置动压大小保持近似相等，静压差维持定值，定子风沟轴向风速相对均匀的目的，从而能够为定子线圈和铁心进行均匀的散热。
七、本发明，轴向环板为圆柱筒状，不仅能够保障良好的散热效果，而且结构简单，易于制造，可降低电机温升达到10K。
八、本发明，轴向环板为端部小、中间大的圆台形状，能够进一步提高散热效果，明显降低电机轴向温差达到10-15K。
九、本发明，轴向环板为端部大、中间小的圆台形状，能够降低电机轴向温差达到10-15K，具有优异的散热效果。
附图说明
下面将结合说明书附图和具体实施方式对本发明作进一步的具体说明，其中：
图1为本发明定子轴向温度分布均匀性装置的结构示意图；
图2为本发明铁心段的结构示意图；
图中标记：1、转子铁心，2、转子机座，3、转子磁钢，4、定子铁心，5、定子压板一，6、定子压板二，7、穿心螺杆，8、轴向环板，9、铁心段，10、定子风沟，11、周向环板，12、定转子间隙，13、定子铁心背部空间，14、铁心冲片，15、凹槽。
具体实施方式
实施例1
参见图1和图2，一种用于改善定子轴向温度分布均匀性的方法，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一5、定子压板二6、轴向环板8、周向环板11和定子铁心4，将周向环板11和轴向环板8之间的夹角设置呈85°，形成定子铁心背部空间13；
c、将定子铁心背部空间13流通的气流设置成与定转子间隙12流通的气流在同一轴向位置流量相同且流向相反。
实施例2
参见图1和图2，一种用于改善定子轴向温度分布均匀性的方法，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一5、定子压板二6、轴向环板8、周向环板11和定子铁心4，将周向环板11和轴向环板8之间的夹角设置呈90°，形成定子铁心背部空间13；
c、将定子铁心背部空间13流通的气流设置成与定转子间隙12流通的气流在同一轴向位置流量相同且流向相反。
实施例3
参见图1和图2，一种用于改善定子轴向温度分布均匀性的方法，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一5、定子压板二6、轴向环板8、周向环板11和定子铁心4，将周向环板11和轴向环板8之间的夹角设置呈95°，形成定子铁心背部空间13；
c、将定子铁心背部空间13流通的气流设置成与定转子间隙12流通的气流在同一轴向位置流量相同且流向相反。
实施例4
参见图1和图2，一种用于改善定子轴向温度分布均匀性的方法，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一5、定子压板二6、轴向环板8、周向环板11和定子铁心4，将周向环板11和轴向环板8之间的夹角设置呈85°，形成定子铁心背部空间13；
c、将定子铁心背部空间13流通的气流设置成与定转子间隙12流通的气流在同一轴向位置流量相同且流向相反。
所述定子轴向温度分布均匀性装置包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8为端部大、中间小的圆台形状。
定子铁心包括多个铁心段，任意两个相邻铁心段之间设置有定子风沟，多个铁心段通过穿心螺杆连接，穿心螺杆的一端与定子压板一固定连接，另一端与定子压板二固定连接，定子压板一和定子压板二之间固定连接有轴向环板，铁心段上固定连接有周向环板，周向环板与轴向环板固定连接，定子铁心和转子铁心之间设置有定转子间隙，定子压板一、定子压板二、轴向环板和定子铁心围成定子铁心背部空间，采用这种特定结构，使用时，能够使得定子铁心背部空间成与定子铁心和转子铁心之间设置的定转子间隙可类比的流动空间，进而使得气流在定转子间隙和定子铁心背部空间在同一轴向位置具有流量相同，流向相反的特性，达到定转子间隙和定子铁心背部空间同一轴向位置动压大小保持近似相等，静压差维持定值，定子风沟轴向风速相对均匀的目的，从而为定子线圈和铁心温度的轴向均匀分布提供有利条件，整个装置对电机本体结构设计不产生影响，且结构简单、易于实施，方便调节，能够有效降低电机轴向温差10-15K。
铁心段包括多个铁心冲片，多个铁心冲片交替叠装形成所述铁心段，铁心冲片上开有用于放置定子线圈的凹槽，制造简单，易于实施，维护更换成本低。
轴向环板为端部大、中间小的圆台形状，能够降低电机轴向温差达到10-15K，具有优异的散热效果。
实施例5
参见图1和图2，一种用于改善定子轴向温度分布均匀性的方法，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一5、定子压板二6、轴向环板8、周向环板11和定子铁心4，将周向环板11和轴向环板8之间的夹角设置呈90°，形成定子铁心背部空间13；
c、将定子铁心背部空间13流通的气流设置成与定转子间隙12流通的气流在同一轴向位置流量相同且流向相反。
所述定子轴向温度分布均匀性装置包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8与铁心段9的径向距离和定转子间隙12的宽度相同。
所述轴向环板8为圆柱筒状。
轴向环板与铁心段的径向距离和定转子间隙的宽度相同，在保障对定子线圈和铁心进行均匀散热的情况下，能够使整个装置结构更加紧凑，占用空间小。
轴向环板为圆柱筒状，不仅能够保障良好的散热效果，而且结构简单，易于制造，可降低电机温升达到10K。
实施例6
参见图1和图2，一种用于改善定子轴向温度分布均匀性的方法，包括以下步骤：
a、将定子轴向温度分布均匀性装置安装到风力发电机上；
b、安装布置定子轴向温度分布均匀性装置的定子压板一5、定子压板二6、轴向环板8、周向环板11和定子铁心4，将周向环板11和轴向环板8之间的夹角设置呈95°，形成定子铁心背部空间13；
c、将定子铁心背部空间13流通的气流设置成与定转子间隙12流通的气流在同一轴向位置流量相同且流向相反。
所述定子轴向温度分布均匀性装置包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多 个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8与铁心段9的径向距离和定转子间隙12的宽度相同。
所述轴向环板8上对应铁心段9的端部开有通风流道，通风流道用于气流流入或流出电机。
所述轴向环板8为端部小、中间大的圆台形状。
轴向环板为端部小、中间大的圆台形状，能够进一步提高散热效果，明显降低电机轴向温差达到10-15K。
实施例7
参见图1和图2，一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
实施例8
参见图1和图2，一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端 与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8与铁心段9的径向距离和定转子间隙12的宽度相同。
所述轴向环板8上对应铁心段9的端部开有通风流道，通风流道用于气流流入或流出电机。
实施例9
参见图1和图2，一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8与铁心段9的径向距离和定转子间隙12的宽度相同。
所述轴向环板8上对应铁心段9的端部开有通风流道，通风流道用于气流流入或流出电机。
周向环板11和轴向环板8之间的夹角为85°。
所述轴向环板8为端部大、中间小的圆台形状。
实施例10
参见图1和图2，一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端 与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8与铁心段9的径向距离和定转子间隙12的宽度相同。
所述轴向环板8上对应铁心段9的端部开有通风流道，通风流道用于气流流入或流出电机。
周向环板11和轴向环板8之间的夹角为90°。
所述轴向环板8为圆柱筒状。
实施例11
参见图1和图2，一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心1和转子机座2，转子铁心1安装在转子机座2上，转子铁心1上固定有多个转子磁钢3，多个转子磁钢3沿转子铁心1的轴向排列布置，还包括定子铁心4、定子压板一5、定子压板二6、穿心螺杆7和轴向环板8，所述定子铁心4包括多个铁心段9，任意两个相邻铁心段9之间设置有定子风沟10，所述多个铁心段9通过穿心螺杆7连接，穿心螺杆7的一端与定子压板一5固定连接，另一端与定子压板二6固定连接，所述定子压板一5和定子压板二6之间固定连接有轴向环板8，所述铁心段9上固定连接有周向环板11，所述周向环板11与轴向环板8固定连接，所述定子铁心4和转子铁心1之间设置有定转子间隙12，所述定子压板一5、定子压板二6、轴向环板8和定子铁心4围成定子铁心背部空间13。
所述铁心段9包括多个铁心冲片14，多个铁心冲片14交替叠装形成所述铁心段9，铁心冲片14上开有用于放置定子线圈的凹槽15。
所述轴向环板8与铁心段9的径向距离和定转子间隙12的宽度相同。
所述轴向环板8上对应铁心段9的端部开有通风流道，通风流道用于气流流入或流出电机。
周向环板11和轴向环板8之间的夹角为95°。
所述轴向环板8为端部小、中间大的圆台形状。

Claims (10)

  1. 一种用于改善定子轴向温度分布均匀性的方法，其特征在于，包括以下步骤：
    a、将定子轴向温度分布均匀性装置安装到风力发电机上；安装布置定子轴向温度分布均匀性装置的定子压板一(5)、定子压板二(6)、轴向环板(8)、周向环板(11)和定子铁心(4)，将周向环板(11)和轴向环板(8)之间的夹角设置呈85-95°，形成定子铁心背部空间(13)；
    b、将定子铁心背部空间(13)流通的气流设置成与定转子间隙(12)流通的气流在同一轴向位置流量相同且流向相反。
  2. 根据权利要求1所述的一种用于改善定子轴向温度分布均匀性的方法，其特征在于：所述定子轴向温度分布均匀性装置包括转子铁心(1)和转子机座(2)，转子铁心(1)安装在转子机座(2)上，转子铁心(1)上固定有多个转子磁钢(3)，多个转子磁钢(3)沿转子铁心(1)的轴向排列布置，还包括定子铁心(4)、定子压板一(5)、定子压板二(6)、穿心螺杆(7)和轴向环板(8)，所述定子铁心(4)包括多个铁心段(9)，任意两个相邻铁心段(9)之间设置有定子风沟(10)，所述多个铁心段(9)通过穿心螺杆(7)连接，穿心螺杆(7)的一端与定子压板一(5)固定连接，另一端与定子压板二(6)固定连接，所述定子压板一(5)和定子压板二(6)之间固定连接有轴向环板(8)，所述铁心段(9)上固定连接有周向环板(11)，所述周向环板(11)与轴向环板(8)固定连接，所述定子铁心(4)和转子铁心(1)之间设置有定转子间隙(12)，所述定子压板一(5)、定子压板二(6)、轴向环板(8)和定子铁心(4)围成定子铁心背部空间(13)。
  3. 根据权利要求2所述的一种用于改善定子轴向温度分布均匀性的方法，其特征在于：所述铁心段(9)包括多个铁心冲片(14)，多个铁心冲片(14)交替叠装形成所述铁心段(9)，铁心冲片(14)上开有用于放置定子线圈的凹槽(15)。
  4. 根据权利要求2所述的一种用于改善定子轴向温度分布均匀性的方法，其特征在于：所述轴向环板(8)与铁心段(9)的径向距离和定转子间隙(12)的宽度相同。
  5. 根据权利要求2所述的一种用于改善定子轴向温度分布均匀性的方法，其特征在于：所述轴向环板(8)上对应铁心段(9)的端部开有通风流道，通风流道用于气流流入或流出电机。
  6. 根据权利要求2所述的一种用于改善定子轴向温度分布均匀性的方 法，其特征在于：所述轴向环板(8)为端部小、中间大的圆台形状。
  7. 根据权利要求2所述的一种用于改善定子轴向温度分布均匀性的方法，其特征在于：所述轴向环板(8)为端部大、中间小的圆台形状。
  8. 一种用于改善定子轴向温度分布均匀性的装置，包括转子铁心(1)和转子机座(2)，转子铁心(1)安装在转子机座(2)上，转子铁心(1)上固定有多个转子磁钢(3)，多个转子磁钢(3)沿转子铁心(1)的轴向排列布置，其特征在于：还包括定子铁心(4)、定子压板一(5)、定子压板二(6)、穿心螺杆(7)和轴向环板(8)，所述定子铁心(4)包括多个铁心段(9)，任意两个相邻铁心段(9)之间设置有定子风沟(10)，所述多个铁心段(9)通过穿心螺杆(7)连接，穿心螺杆(7)的一端与定子压板一(5)固定连接，另一端与定子压板二(6)固定连接，所述定子压板一(5)和定子压板二(6)之间固定连接有轴向环板(8)，所述铁心段(9)上固定连接有周向环板(11)，所述周向环板(11)与轴向环板(8)固定连接，所述定子铁心(4)和转子铁心(1)之间设置有定转子间隙(12)，所述定子压板一(5)、定子压板二(6)、轴向环板(8)和定子铁心(4)围成定子铁心背部空间(13)。
  9. 根据权利要求8所述的一种用于改善定子轴向温度分布均匀性的装置，其特征在于：所述铁心段(9)包括多个铁心冲片(14)，多个铁心冲片(14)交替叠装形成所述铁心段(9)，铁心冲片(14)上开有用于放置定子线圈的凹槽(15)。
  10. 根据权利要求8所述的一种用于改善定子轴向温度分布均匀性的装置，其特征在于：所述轴向环板(8)与铁心段(9)的径向距离和定转子间隙(12)的宽度相同。
PCT/CN2020/112044 2019-08-30 2020-08-28 一种用于改善定子轴向温度分布均匀性的方法及装置 WO2021037193A1 (zh)

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