CN110460180B - Method for improving axial temperature distribution uniformity of stator - Google Patents
Method for improving axial temperature distribution uniformity of stator Download PDFInfo
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- CN110460180B CN110460180B CN201910813304.2A CN201910813304A CN110460180B CN 110460180 B CN110460180 B CN 110460180B CN 201910813304 A CN201910813304 A CN 201910813304A CN 110460180 B CN110460180 B CN 110460180B
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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
- H02K1/16—Stator cores with slots for windings
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a method for improving the axial temperature distribution uniformity of a stator, which belongs to the technical field of generators and is characterized by comprising the following steps: a. installing a stator axial temperature distribution uniformity device on a wind driven generator; b. installing and arranging a stator pressing plate I, a stator pressing plate II, an axial annular plate, a circumferential annular plate and a stator core of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate and the axial annular plate to be 85-95 degrees to form a stator core back space; c. the air flow circulating in the back space of the stator core is set to be the same as the air flow circulating in the clearance between the stator and the rotor at the same axial position and the flow direction is opposite. The static pressure difference maintaining device can maintain the static pressure difference at a fixed value, the axial wind speed of the stator wind channel is relatively uniform, the operation is simple, the adjustment is easy, the axial temperature difference between the stator coil and the iron core can be effectively reduced, and the use reliability and stability of the generator are guaranteed.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a method for improving the axial temperature distribution uniformity of a stator.
Background
For large rotating electrical machines, it is very common to arrange a certain number of ventilation channels in the stator for cooling the stator coils and the core. Different flow patterns can be formed in cooperation with other structures. The air flow is divided from the air gap to the stator air duct, and the air flow is the same as the flow in most cases in the motor and is called positive flow; the air flow from the stator ducts converges to the air gap, counter to the flow prevailing in the machine, known as counterflow.
For the actual structure of the motor, the general space of the back of the air duct is large, it can be considered that the pressure is kept unchanged, for the air gap, the electromagnetic design of the motor usually causes the flowing space to be very limited, and the pressure change in the air gap space is very complex due to the continuous separation or convergence of the air flow along the axial direction of the air gap.
The research shows that: in both the positive flow mode and the reverse flow mode, the velocity distribution in the stator air duct is easily uneven as long as the maximum resultant velocity of the air gap reaches more than 30m/s, so that a stator coil or an iron core has a large temperature difference in the axial direction. The main technical solution at present adopts the ladder tooth structure for stator side section iron core, and what be exactly will lean on several sections of iron core internal diameters of tip to do is big than other sections yet to increase the air gap area of overflowing, reduce the maximum speed of air gap, thereby improve stator wind channel wind speed and coil, the homogeneity of iron core temperature axial distribution, however, side section iron core structure plays crucial effect to iron core section axial compression, side section iron core sets up ladder tooth structure and can produce adverse effect to the iron core degree of compressing tightly.
Chinese patent publication No. CN 207559785U, published as 2018, 06, 29, discloses a motor with a stator having a wind slot, which comprises a base, a stator and a rotor, wherein a radial stator wind channel is arranged on the outer surface of the stator, and a coil and a slot wedge are mounted in a punching sheet cavity of the stator, and is characterized in that: the slot wedge is equipped with the slot wedge clearance with the interior anchor ring of stator, one side of frame is equipped with air intake and air outlet, the stator clamp plate is installed to the tip of stator, stator clamp plate and frame fixed connection are equipped with a plurality of ventilation holes on the stator clamp plate, be equipped with the annular slab between the tip of rotor and the frame, annular slab, stator and stator clamp plate divide into water conservancy diversion cavity I and water conservancy diversion cavity II with the inner chamber of frame, water conservancy diversion cavity I communicates through ventilation hole, stator wind ditch, stator rotor air gap and slot wedge clearance with water conservancy diversion cavity II.
Although the motor disclosed in this patent document having a stator with a ventilation slot can increase the axial ventilation amount inside the motor, the axial wind speed of the stator wind channel is not uniform, and the axial temperature difference between the stator coil and the core cannot be effectively reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for improving the axial temperature distribution uniformity of a stator.
The invention is realized by the following technical scheme:
a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I, a stator pressing plate II, an axial annular plate, a circumferential annular plate and a stator core of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate and the axial annular plate to be 85-95 degrees to form a stator core back space;
c. the air flow circulating in the back space of the stator core is set to be the same as the air flow circulating in the clearance between the stator and the rotor at the same axial position and the flow direction is opposite.
The stator axial temperature distribution uniformity device comprises a rotor core and a rotor base, wherein the rotor core is arranged on the rotor base, a plurality of rotor magnetic steels are fixed on the rotor core, the plurality of rotor magnetic steels are arranged along the axial direction of the rotor core, the stator core further comprises a stator core, a first stator pressing plate, a second stator pressing plate, a first penetrating screw and an axial ring plate, the stator core comprises a plurality of core sections, a stator air duct is arranged between any two adjacent core sections, the plurality of core sections are connected through the penetrating screw, one end of the penetrating screw is fixedly connected with the first stator pressing plate, the other end of the penetrating screw is fixedly connected with the second stator pressing plate, the axial ring plate is fixedly connected between the first stator pressing plate and the second stator pressing plate, a circumferential ring plate is fixedly connected on the core sections, the circumferential ring plate is fixedly connected with the axial ring plate, and a stator-rotor gap is arranged between the stator core and the, and the stator pressing plate I, the stator pressing plate II, the axial ring plate and the stator core enclose a stator core back space.
The iron core segment comprises a plurality of iron core punching sheets, the iron core segment is formed by alternately stacking the iron core punching sheets, and grooves for placing stator coils are formed in the iron core punching sheets.
The radial distance between the axial ring plate and the iron core section is the same as the width of the stator and rotor gaps.
And the end part of the axial ring plate corresponding to the iron core section is provided with a ventilation flow channel, and the ventilation flow channel is used for airflow to flow into or flow out of the motor.
The axial ring plate is cylindrical.
The axial ring plate is in a circular truncated cone shape with a small end part and a large middle part.
The axial ring plate is in a circular truncated cone shape with a large end part and a small middle part.
The beneficial effects of the invention are mainly shown in the following aspects:
firstly, the invention 'a', the stator axial temperature distribution uniformity device is arranged on the wind driven generator; b. installing and arranging a stator pressing plate I, a stator pressing plate II, an axial annular plate, a circumferential annular plate and a stator core of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate and the axial annular plate to be 85-95 degrees to form a stator core back space; c. the air flow that circulates with stator core back space sets to the air flow that circulates with stator-rotor clearance the same and flow direction opposite at same axial position flow, and compared with the prior art, can make the static pressure difference maintain the definite value, stator wind channel axial wind speed is even relatively, and easy operation easily adjusts, can effectively reduce stator coil and the axial difference in temperature of iron core, ensures generator reliability in utilization and stability.
Secondly, the invention, the stator iron core includes a plurality of iron core sections, there are stator wind channels between any two adjacent iron core sections, a plurality of iron core sections are connected through the threaded rod, one end of the threaded rod is fixedly connected with a stator pressing plate I, another end is fixedly connected with a stator pressing plate II, an axial ring plate is fixedly connected between the stator pressing plate I and the stator pressing plate II, the iron core section is fixedly connected with a circumferential ring plate, the circumferential ring plate is fixedly connected with the axial ring plate, a stator-rotor gap is arranged between the stator iron core and the rotor iron core, the stator pressing plate I, the stator pressing plate II, the axial ring plate and the stator iron core enclose a stator iron core back space, adopting the specific structure, when in use, the stator iron core back space can become a flow space comparable to the stator-rotor gap arranged between the stator iron core and the rotor iron core, and further the air flow has the same flow rate at the same axial position between the stator-rotor gap, the characteristics that the flow directions are opposite are achieved, the purposes that dynamic pressure sizes of the stator and rotor gaps and the back space of the stator core at the same axial position are approximately equal, static pressure differences maintain fixed values, and axial wind speeds of the stator wind channel are relatively uniform are achieved, so that favorable conditions are provided for axial uniform distribution of temperatures of the stator coil and the core, the whole device does not affect structural design of the motor body, the structure is simple, the implementation is easy, the adjustment is convenient, and the axial temperature difference of the motor can be effectively reduced by 10-15K.
The iron core section comprises a plurality of iron core punching sheets, the iron core punching sheets are alternately stacked to form the iron core section, and grooves for placing the stator coils are formed in the iron core punching sheets.
And the radial distance between the axial ring plate and the iron core section is the same as the width of the stator and rotor gaps, so that the whole device has a more compact structure and occupies a small space under the condition of ensuring uniform heat dissipation of the stator coil and the iron core.
And fifthly, according to the invention, the end part of the axial ring plate corresponding to the iron core section is provided with the ventilation flow channel, and the ventilation flow channel is used for airflow flowing into or out of the motor, so that the ventilation effect can be further improved, and the heat dissipation is more uniform.
According to the invention, the included angle between the circumferential annular plate and the axial annular plate is 85-95 degrees, and by adopting the specific arrangement mode, the purposes that the dynamic pressure of the stator and rotor clearance and the dynamic pressure of the same axial position of the back space of the stator core are kept approximately equal, the static pressure difference is kept constant, and the axial wind speed of the stator wind channel is relatively uniform can be better achieved, so that the stator coil and the core can be uniformly radiated.
Seventh, the invention, the axial annular plate is cylindrical, not only can guarantee the good heat-dissipating effect, but also simple in construction, easy to make, can reduce the temperature rise of the electrical machinery to reach 10K.
According to the invention, the axial ring plate is in a circular truncated cone shape with small end part and large middle part, so that the heat dissipation effect can be further improved, and the axial temperature difference of the motor can be obviously reduced to 10-15K.
The axial ring plate is in a circular truncated cone shape with a large end part and a small middle part, can reduce the axial temperature difference of the motor to 10-15K, and has an excellent heat dissipation effect.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, in which:
FIG. 1 is a schematic structural diagram of a stator axial temperature distribution uniformity apparatus according to the present invention;
FIG. 2 is a schematic view of a core segment according to the present invention;
the labels in the figure are: 1. the stator comprises a rotor core, 2, a rotor base, 3, rotor magnetic steel, 4, a stator core, 5, stator pressing plates I and 6, stator pressing plates II and 7, a through screw, 8, an axial ring plate, 9, an iron core section, 10, a stator air duct, 11, a circumferential ring plate, 12, a stator and rotor gap, 13, a stator core back space, 14, an iron core punching sheet, 15 and a groove.
Detailed Description
Example 1
Referring to fig. 1 and 2, a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I5, a stator pressing plate II 6, an axial ring plate 8, a circumferential ring plate 11 and a stator core 4 of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential ring plate 11 and the axial ring plate 8 to be 85 degrees to form a stator core back space 13;
c. the air flow flowing through the stator core back space 13 is set to have the same flow rate and the opposite flow direction at the same axial position as the air flow flowing through the stator-rotor gap 12.
Example 2
Referring to fig. 1 and 2, a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I5, a stator pressing plate II 6, an axial annular plate 8, a circumferential annular plate 11 and a stator core 4 of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate 11 and the axial annular plate 8 to be 90 degrees to form a stator core back space 13;
c. the air flow flowing through the stator core back space 13 is set to have the same flow rate and the opposite flow direction at the same axial position as the air flow flowing through the stator-rotor gap 12.
Example 3
Referring to fig. 1 and 2, a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I5, a stator pressing plate II 6, an axial annular plate 8, a circumferential annular plate 11 and a stator core 4 of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate 11 and the axial annular plate 8 to be 95 degrees to form a stator core back space 13;
c. the air flow flowing through the stator core back space 13 is set to have the same flow rate and the opposite flow direction at the same axial position as the air flow flowing through the stator-rotor gap 12.
Example 4
Referring to fig. 1 and 2, a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I5, a stator pressing plate II 6, an axial ring plate 8, a circumferential ring plate 11 and a stator core 4 of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential ring plate 11 and the axial ring plate 8 to be 85 degrees to form a stator core back space 13;
c. the air flow flowing through the stator core back space 13 is set to have the same flow rate and the opposite flow direction at the same axial position as the air flow flowing through the stator-rotor gap 12.
The stator axial temperature distribution uniformity device comprises a rotor core 1 and a rotor base 2, wherein the rotor core 1 is arranged on the rotor base 2, a plurality of rotor magnetic steels 3 are fixed on the rotor core 1, the plurality of rotor magnetic steels 3 are arranged along the axial direction of the rotor core 1, the stator core 4, a stator pressing plate I5, a stator pressing plate II 6, a feed-through screw 7 and an axial ring plate 8 are further included, the stator core 4 comprises a plurality of core sections 9, a stator air duct 10 is arranged between any two adjacent core sections 9, the plurality of core sections 9 are connected through the feed-through screw 7, one end of the feed-through screw 7 is fixedly connected with the stator pressing plate I5, the other end of the feed-through screw is fixedly connected with the stator pressing plate II 6, the axial ring plate 8 is fixedly connected between the stator pressing plate I5 and the stator pressing plate II 6, a circumferential ring plate 11 is fixedly connected on the core sections 9, the circumferential ring plate 11 is fixedly connected with the axial, and a stator-rotor gap 12 is arranged between the stator core 4 and the rotor core 1, and a stator core back space 13 is enclosed by the stator pressing plate I5, the stator pressing plate II 6, the axial ring plate 8 and the stator core 4.
The iron core section 9 comprises a plurality of iron core punching sheets 14, the iron core sections 9 are formed by alternately stacking the iron core punching sheets 14, and grooves 15 for placing stator coils are formed in the iron core punching sheets 14.
The axial ring plate 8 is in a circular truncated cone shape with a large end part and a small middle part.
The stator iron core comprises a plurality of iron core sections, a stator air channel is arranged between any two adjacent iron core sections, the iron core sections are connected through a through screw, one end of the through screw is fixedly connected with a stator pressing plate I, the other end of the through screw is fixedly connected with a stator pressing plate II, an axial ring plate is fixedly connected between the stator pressing plate I and the stator pressing plate II, a circumferential ring plate is fixedly connected to the iron core sections and fixedly connected with the axial ring plate, a stator and rotor gap is arranged between the stator iron core and the rotor iron core, the stator pressing plate I, the stator pressing plate II, the axial ring plate and the stator iron core enclose a stator iron core back space, the specific structure is adopted, when the stator iron core back space is used, the stator iron core back space can become a flow space similar to the stator and rotor gap arranged between the stator iron core and the rotor iron core, and then the air flow in the same axial position of the stator iron core, the characteristics that the flow directions are opposite are achieved, the purposes that dynamic pressure sizes of the stator and rotor gaps and the back space of the stator core at the same axial position are approximately equal, static pressure differences maintain fixed values, and axial wind speeds of the stator wind channel are relatively uniform are achieved, so that favorable conditions are provided for axial uniform distribution of temperatures of the stator coil and the core, the whole device does not affect structural design of the motor body, the structure is simple, the implementation is easy, the adjustment is convenient, and the axial temperature difference of the motor can be effectively reduced by 10-15K.
The iron core segment comprises a plurality of iron core punching sheets, the iron core segments are formed by alternately stacking the iron core punching sheets, and grooves for placing stator coils are formed in the iron core punching sheets.
The axial ring plate is in a circular truncated cone shape with a large end part and a small middle part, can reduce the axial temperature difference of the motor to 10-15K, and has an excellent heat dissipation effect.
Example 5
Referring to fig. 1 and 2, a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I5, a stator pressing plate II 6, an axial annular plate 8, a circumferential annular plate 11 and a stator core 4 of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate 11 and the axial annular plate 8 to be 90 degrees to form a stator core back space 13;
c. the air flow flowing through the stator core back space 13 is set to have the same flow rate and the opposite flow direction at the same axial position as the air flow flowing through the stator-rotor gap 12.
The stator axial temperature distribution uniformity device comprises a rotor core 1 and a rotor base 2, wherein the rotor core 1 is arranged on the rotor base 2, a plurality of rotor magnetic steels 3 are fixed on the rotor core 1, the plurality of rotor magnetic steels 3 are arranged along the axial direction of the rotor core 1, the stator core 4, a stator pressing plate I5, a stator pressing plate II 6, a feed-through screw 7 and an axial ring plate 8 are further included, the stator core 4 comprises a plurality of core sections 9, a stator air duct 10 is arranged between any two adjacent core sections 9, the plurality of core sections 9 are connected through the feed-through screw 7, one end of the feed-through screw 7 is fixedly connected with the stator pressing plate I5, the other end of the feed-through screw is fixedly connected with the stator pressing plate II 6, the axial ring plate 8 is fixedly connected between the stator pressing plate I5 and the stator pressing plate II 6, a circumferential ring plate 11 is fixedly connected on the core sections 9, the circumferential ring plate 11 is fixedly connected with the axial, and a stator-rotor gap 12 is arranged between the stator core 4 and the rotor core 1, and a stator core back space 13 is enclosed by the stator pressing plate I5, the stator pressing plate II 6, the axial ring plate 8 and the stator core 4.
The iron core section 9 comprises a plurality of iron core punching sheets 14, the iron core sections 9 are formed by alternately stacking the iron core punching sheets 14, and grooves 15 for placing stator coils are formed in the iron core punching sheets 14.
The radial distance between the axial ring plate 8 and the iron core section 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 annular plate and the iron core section is the same as the width of the stator and rotor gaps, so that the whole device is more compact in structure and small in occupied space under the condition of ensuring uniform heat dissipation of the stator coil and the iron core.
The axial ring plate is cylindrical, so that a good heat dissipation effect can be guaranteed, the structure is simple, the manufacturing is easy, and the temperature rise of the motor can be reduced to 10K.
Example 6
Referring to fig. 1 and 2, a method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator;
b. installing and arranging a stator pressing plate I5, a stator pressing plate II 6, an axial annular plate 8, a circumferential annular plate 11 and a stator core 4 of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential annular plate 11 and the axial annular plate 8 to be 95 degrees to form a stator core back space 13;
c. the air flow flowing through the stator core back space 13 is set to have the same flow rate and the opposite flow direction at the same axial position as the air flow flowing through the stator-rotor gap 12.
The stator axial temperature distribution uniformity device comprises a rotor core 1 and a rotor base 2, wherein the rotor core 1 is arranged on the rotor base 2, a plurality of rotor magnetic steels 3 are fixed on the rotor core 1, the plurality of rotor magnetic steels 3 are arranged along the axial direction of the rotor core 1, the stator core 4, a stator pressing plate I5, a stator pressing plate II 6, a feed-through screw 7 and an axial ring plate 8 are further included, the stator core 4 comprises a plurality of core sections 9, a stator air duct 10 is arranged between any two adjacent core sections 9, the plurality of core sections 9 are connected through the feed-through screw 7, one end of the feed-through screw 7 is fixedly connected with the stator pressing plate I5, the other end of the feed-through screw is fixedly connected with the stator pressing plate II 6, the axial ring plate 8 is fixedly connected between the stator pressing plate I5 and the stator pressing plate II 6, a circumferential ring plate 11 is fixedly connected on the core sections 9, the circumferential ring plate 11 is fixedly connected with the axial, and a stator-rotor gap 12 is arranged between the stator core 4 and the rotor core 1, and a stator core back space 13 is enclosed by the stator pressing plate I5, the stator pressing plate II 6, the axial ring plate 8 and the stator core 4.
The iron core section 9 comprises a plurality of iron core punching sheets 14, the iron core sections 9 are formed by alternately stacking the iron core punching sheets 14, and grooves 15 for placing stator coils are formed in the iron core punching sheets 14.
The radial distance between the axial ring plate 8 and the iron core section 9 is the same as the width of the stator-rotor gap 12.
The end part of the axial ring plate 8 corresponding to the iron core section 9 is provided with a ventilation flow channel, and the ventilation flow channel is used for airflow flowing into or flowing out of the motor.
The axial ring plate 8 is in a circular truncated cone shape with a small end part and a large middle part.
The axial ring plate is in a circular truncated cone shape with small end part and large middle part, so that the heat dissipation effect can be further improved, and the axial temperature difference of the motor can be obviously reduced to 10-15K.
Claims (4)
1. A method for improving stator axial temperature distribution uniformity, comprising the steps of:
a. installing a stator axial temperature distribution uniformity device on a wind driven generator; installing and arranging a stator pressing plate I (5), a stator pressing plate II (6), an axial ring plate (8), a circumferential ring plate (11) and a stator core (4) of the stator axial temperature distribution uniformity device, and setting an included angle between the circumferential ring plate (11) and the axial ring plate (8) to be 85-95 degrees to form a stator core back space (13);
b. setting the air flow circulating through the back space (13) of the stator core to be the same as the air flow circulating through the stator-rotor gap (12) in the flow rate and opposite to the flow direction at the same axial position;
the stator axial temperature distribution uniformity device comprises a rotor iron core (1) and a rotor base (2), wherein the rotor iron core (1) is installed on the rotor base (2), a plurality of rotor magnetic steels (3) are fixed on the rotor iron core (1), the plurality of rotor magnetic steels (3) are arranged along the axial direction of the rotor iron core (1), the stator axial temperature distribution uniformity device further comprises a stator iron core (4), a stator pressing plate I (5), a stator pressing plate II (6), a core penetrating screw (7) and an axial ring plate (8), the stator iron core (4) comprises a plurality of iron core sections (9), a stator air duct (10) is arranged between any two adjacent iron core sections (9), the plurality of iron core sections (9) are connected through the core penetrating screw (7), one end of the core penetrating screw (7) is fixedly connected with the stator pressing plate I (5), the other end of the core penetrating screw is fixedly connected with the stator pressing plate II (6), the axial ring plate (8) is fixedly connected between the stator pressing plate I (5) and the stator, a circumferential annular plate (11) is fixedly connected to the iron core section (9), the circumferential annular plate (11) is fixedly connected with an axial annular plate (8), a stator-rotor gap (12) is arranged between the stator core (4) and the rotor core (1), and a stator core back space (13) is enclosed by the stator pressing plate I (5), the stator pressing plate II (6), the axial annular plate (8) and the stator core (4); the axial ring plate (8) is in a circular truncated cone shape with a small end part and a large middle part or in a circular truncated cone shape with a large end part and a small middle part.
2. A method for improving stator axial temperature distribution uniformity according to claim 1, wherein: the iron core segment (9) comprises a plurality of iron core punching sheets (14), the iron core segment (9) is formed by alternately stacking the iron core punching sheets (14), and grooves (15) for placing stator coils are formed in the iron core punching sheets (14).
3. A method for improving stator axial temperature distribution uniformity according to claim 1, wherein: the radial distance between the axial ring plate (8) and the iron core section (9) is the same as the width of the stator-rotor gap (12).
4. A method for improving stator axial temperature distribution uniformity according to claim 1, wherein: and a ventilation flow channel is formed in the end part, corresponding to the iron core section (9), of the axial ring plate (8), and the ventilation flow channel is used for enabling air flow to flow into or flow out of the motor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813304.2A CN110460180B (en) | 2019-08-30 | 2019-08-30 | Method for improving axial temperature distribution uniformity of stator |
| PCT/CN2020/112044 WO2021037193A1 (en) | 2019-08-30 | 2020-08-28 | Method and device for improving uniformity of axial temperature distribution of stator |
| EP20856765.1A EP4007124A4 (en) | 2019-08-30 | 2020-08-28 | Method and device for improving uniformity of axial temperature distribution of stator |
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| CN201910813304.2A CN110460180B (en) | 2019-08-30 | 2019-08-30 | Method for improving axial temperature distribution uniformity of stator |
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| CN110460180A CN110460180A (en) | 2019-11-15 |
| CN110460180B true CN110460180B (en) | 2020-11-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4007124A4 (en) * | 2019-08-30 | 2023-01-04 | Dongfang Electric Machinery Co., Ltd. | Method and device for improving uniformity of axial temperature distribution of stator |
| CN112953052B (en) * | 2021-04-26 | 2022-07-19 | 哈动国家水力发电设备工程技术研究中心有限公司 | Method for determining height of lamination of stator core section of permanent magnet direct-drive wind driven generator |
| CN114662365B (en) * | 2022-04-01 | 2023-04-07 | 东方电气集团东方电机有限公司 | Method for analyzing starting performance of cage type motor |
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| CN102939700A (en) * | 2010-06-11 | 2013-02-20 | 西门子公司 | Dynamoelectric machine having air/liquid cooling |
| CN103368291A (en) * | 2012-04-03 | 2013-10-23 | 西门子公司 | Rotor arrangement |
| CN205791838U (en) * | 2016-05-19 | 2016-12-07 | 哈尔滨理工大学 | There is water-cooled stator and the steam turbine generator cooling system of fan inside formula rotor |
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| JPH0775289A (en) * | 1993-09-01 | 1995-03-17 | Fuji Electric Co Ltd | Ventilating and cooling device for salient pole type rotating electric machine |
| CN109474113B (en) * | 2018-09-06 | 2020-06-23 | 新疆金风科技股份有限公司 | Motor and wind generating set |
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| EP0155405A1 (en) * | 1984-03-21 | 1985-09-25 | Siemens Aktiengesellschaft | Device for indirect gas cooling of stator windings and/or for the direct gas cooling of stator laminated magnetic cores of a dynamo-electric machine, particularly for gas-cooled turbogenerators |
| US6359350B1 (en) * | 1999-04-14 | 2002-03-19 | Hitachi, Ltd. | Rotary electric machine |
| CN102939700A (en) * | 2010-06-11 | 2013-02-20 | 西门子公司 | Dynamoelectric machine having air/liquid cooling |
| CN201869024U (en) * | 2010-11-30 | 2011-06-15 | 东方电气集团东方电机有限公司 | Ventilation structure of permanent magnet generator |
| CN103368291A (en) * | 2012-04-03 | 2013-10-23 | 西门子公司 | Rotor arrangement |
| CN205791838U (en) * | 2016-05-19 | 2016-12-07 | 哈尔滨理工大学 | There is water-cooled stator and the steam turbine generator cooling system of fan inside formula rotor |
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| CN110460180A (en) | 2019-11-15 |
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