CN114825770B - Distributed synchronous phase modulator stator yoke back and rotor retaining ring cascade water cooling system - Google Patents
Distributed synchronous phase modulator stator yoke back and rotor retaining ring cascade water cooling system Download PDFInfo
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- CN114825770B CN114825770B CN202210483845.5A CN202210483845A CN114825770B CN 114825770 B CN114825770 B CN 114825770B CN 202210483845 A CN202210483845 A CN 202210483845A CN 114825770 B CN114825770 B CN 114825770B
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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
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A distributed cascade water cooling system for a stator yoke back and a rotor retaining ring of a synchronous phase modifier relates to a cascade water cooling system for the stator yoke back and the rotor retaining ring of the synchronous phase modifier. The invention aims to solve the problem that the temperature of a stator and a rotor is excessively increased in the processes of motor forced excitation and overload operation due to the unreasonable design of a cooling system of the conventional synchronous phase modulator. The suspension type air cooler is arranged below a shell of a distributed synchronous phase modulator, the yoke hot air area water cooler is arranged above the shell of the distributed synchronous phase modulator, a back cooling water channel of a yoke of a stator hot air area is coaxially sleeved on a stator core lamination of the distributed synchronous phase modulator, a rotor side excitation winding cooling water channel is coaxially sleeved on a rotating shaft of the distributed synchronous phase modulator, and the back cooling water channel of the yoke of the stator hot air area is communicated with the rotor side excitation winding cooling water channel. The invention belongs to the technical field of motors.
Description
Technical Field
The invention relates to a stator yoke back and rotor guard ring cascade water cooling system of a synchronous phase modulator, belonging to the technical field of motors.
Background
The demand of dynamic reactive power of a converter station in a direct current transmission project is larger and larger, and the phase modifier plays an increasingly prominent role in the direct current transmission project along with the continuous operation of a 300Mvar synchronous phase modifier; the provision of instantaneous large capacity dynamic reactive compensation is crucial to ensure the stability of the power system. In order to generally improve the voltage level of each key node of a transmitting end and a receiving end, reduce the overvoltage level and the off-line risk of a new energy station and improve the power of ultra-high voltage direct current transmission, a novel distributed synchronous phase modulator is provided. The large synchronous phase modulator for the extra-high voltage power transmission system is required to have a quick dynamic response capability and a strong excitation capability, and in addition, the phase modulator for the extra-high voltage is required to have a higher short-time overload capability than a common non-salient pole synchronous generator so as to ensure the stability of the voltage of a power grid when the power grid fails; and the phase modifier is in a continuous and uninterrupted running state, which has higher cooling requirement on the distributed synchronous phase modifier for extra-high voltage, thereby optimizing the cooling environment of the stator and the rotor and the winding to a greater extent and ensuring the safe and stable running of the synchronous phase modifier.
At present, the cooling technology of the distributed synchronous phase modulator for the extra-high voltage is mainly a single air cooling mode for cooling the yoke part of the stator core, the temperature rise of the back part of the stator core yoke in a hot air area is serious, and the cooling technology for the back part of the iron core yoke in the hot air area is not perfect compared with the tooth part cooling technology, so the development of the cooling technology for the yoke part of the stator core is particularly important.
The technical progress of the gas-liquid coordinated cooling of the stator and the rotor of the distributed synchronous phase modulator has important significance for extra-high voltage direct current transmission engineering, and the problem that the temperature of the stator and the rotor is excessively increased in the process of strong excitation and overload operation of a motor due to unreasonable design of a cooling system still exists at present.
Disclosure of Invention
The invention provides a distributed cascade water cooling system of a stator yoke back and a rotor retaining ring of a synchronous phase modulator, aiming at solving the problem that the temperature rise of a stator and a rotor is overhigh in the processes of forced excitation and overload operation of a motor due to the unreasonable design of a cooling system of the conventional synchronous phase modulator.
The technical scheme adopted by the invention for solving the problems is as follows: the invention comprises a suspension type air cooler, a yoke hot air area water cooler, a stator hot air area yoke back cooling water path and a rotor side excitation winding cooling water path; suspension type air cooler sets up in the below of the casing of distributing type synchronous phase modifier, and suspension type air cooler is located the closed shell of distributing type synchronous phase modifier, and the hot-blast district water cooler of yoke sets up in the top of the casing of distributing type synchronous phase modifier, and the hot-blast district water cooler of yoke is located the closed shell of distributing type synchronous phase modifier, the coaxial suit in stator hot-blast district yoke back cooling water route is on the stator core lamination of distributing type synchronous phase modifier, the coaxial suit in rotor side field winding cooling water route is in the pivot of distributing type synchronous phase modifier, just rotor side field winding cooling water route is located the air gap between the pivot of distributing type synchronous phase modifier and the stator core lamination, stator hot-blast district yoke back cooling water route with rotor side field winding cooling water route intercommunication, just stator hot-blast district back cooling water route with rotor side field winding cooling water route communicates with hot-blast district water cooler of yoke jointly.
Furthermore, stator hot-blast district yoke back cooling water route is kept out the wind water cooling passageway by a plurality of surface mounted formula and is kept out the wind with a plurality of stators and communicate the water course and set up along the axial of the pivot of distributed synchronous phase modulation machine in a staggered way and form, and adjacent surface mounted formula keeps out the wind water cooling passageway and keeps out the wind with the stator and communicate the water course through arc water course.
Furthermore, a fan-shaped multi-wedge structure is filled between the surface-mounted wind and water cooling channel and the stator core lamination of the distributed phase modulator.
Furthermore, rotor side field winding cooling water route comprises rotor cooling water course, water-cooled retaining ring, cascade water course and ring intercommunication water course, and rotor cooling water course distributes in the rotor water-cooling auxiliary tank of distributing type synchronous phase modifier, and rotor cooling water course communicates water course and water-cooled retaining ring intercommunication through the ring, is equipped with the dynamic seal face on the rotor cooling water course, and the dynamic seal face communicates with the hot-blast district water cooler of yoke portion through cascading the water course.
Furthermore, the water-cooled protective ring is hollow, and an angular copper frame structure for supporting is arranged in the water-cooled protective ring.
Furthermore, the invention also comprises two mixed flow fans which are respectively arranged at two ends of the rotating shaft.
Furthermore, a gap is reserved between the stator wind shielding communication water channel and the stator core lamination of the distributed synchronous phase modulator, and a trapezoidal structure is adopted.
The invention has the beneficial effects that: the invention sucks air cooled in a machine shell and a closed shell by installing a strong-pressure mixed-flow fan on a rotor, blows in along the axial direction of an air gap, blows in a stator end winding at the same time, blows in a stator core lamination through (1) an air area under the action of a surface-mounted wind and water cooling channel, forms a circulating air area in other air areas, blows out the air through (2) the air area to reach a suspended air cooler, sucks the cooled air into the machine through the mixed-flow fan, forms a multi-inlet and multi-outlet air cooling loop, and greatly reduces the temperature rise of the stator; the surface-mounted wind and water cooling channel is communicated with the stator wind shielding communicating water channel to form a stator side cooling water channel, and is used for reducing the temperature rise of the yoke part of the stator iron core and the winding at the end part of the stator under the action of the yoke part hot air area water cooler; in the strong excitation operation process of the motor, the temperature of the rotor excitation winding rises rapidly, the rotor is provided with a water-cooling auxiliary groove with a U-shaped outer wall, a rotor cooling water channel is embedded in the water-cooling auxiliary groove and is communicated with a water-cooling retaining ring through a ring communication water channel, a dynamic sealing surface is arranged on the ring communication water channel, and a communication water channel is formed by a cascade water channel and a hot air zone water cooler of the yoke part and is used for cooling the rotor and the excitation winding. The method plays an important role in the stable operation of the large synchronous phase modulator under the strong excitation operation state.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic view of a surface-mounted wind-shielding water-cooling channel and a stator wind-shielding communicating water channel;
FIG. 3 is a radial cross-sectional view of a distributed synchronous condenser rotor construction;
FIG. 4 is a schematic view of a distributed synchronous phase modulator rotor end water cooling configuration;
1-stator iron core lamination, 2-machine shell, 3-rotating shaft, 3-1 rotor water-cooling auxiliary groove, 4-excitation winding, 5-stator end winding, 6-surface-mounted wind and water cooling channel, 6-1 surface-mounted wind and water cooling channel wedge structure, 6-2 arc water channel, 7-suspension type air cooler, 8-rotor cooling water channel, 8-1 circular ring communicating water channel, 8-2 cascade water channel, 8-3 dynamic sealing surface, 9-water-cooled guard ring, 9-1 angular copper frame structure, 10-mixed flow fan, 11-hot air zone, 12-air gap, 13-stator wind and water channel, 14-yoke hot air zone water cooler, 15-cascade water channel, 16-closed shell, (1) air zone is air inlet zone, and (2) air zone is air outlet zone;
the arrows in fig. 1 show the flow direction of cooling air and cooling water in the distributed synchronous phase modulator stator yoke back and rotor shroud cascade water cooling system.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the distributed cascade water cooling system for the stator yoke back and the rotor retaining ring of the synchronous phase modulator in the embodiment comprises a suspended air cooler 7, a yoke hot air zone water cooler 14, a stator hot air zone yoke back cooling water channel and a rotor side field winding cooling water channel; suspension type air cooler 7 sets up in the below of the casing 2 of distributed synchronous phase modifier, and suspension type air cooler 7 is located the closed shell 16 of distributed synchronous phase modifier, and yoke hot-blast district water cooler 14 sets up in the top of the casing 2 of distributed synchronous phase modifier, and yoke hot-blast district water cooler 14 is located the closed shell 16 of distributed synchronous phase modifier, stator hot-blast district yoke back cooling water route coaxial suit is on the stator core lamination 1 of distributed synchronous phase modifier, rotor side excitation winding cooling water route coaxial suit is on the pivot 3 of distributed synchronous phase modifier, just rotor side excitation winding cooling water route is located the air gap 12 between pivot 3 and the stator core lamination 1 of distributed synchronous phase modifier, stator hot-blast district yoke back cooling water route with rotor side excitation winding excitation cooling water route intercommunication, just stator hot-blast district yoke back cooling water route with rotor side excitation winding cooling water route communicates with hot-blast district water cooler 14 jointly.
In the embodiment, the distributed phase modulator comprises a stator core lamination 1, a shell 2, a rotating shaft 3, an excitation winding 4, an end winding 5 and a closed shell 16, wherein the shell 2 is arranged in the closed shell 16, the rotating shaft 3 is horizontally inserted in the shell 2, the stator core lamination 1 is coaxially sleeved on the rotating shaft 3, an air gap 12 is reserved between the stator core lamination 1 and the rotating shaft 3, and the end winding 5 is arranged on the core lamination 1.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1 and fig. 2, the stator hot air zone yoke back cooling water channel according to the present embodiment is formed by alternately arranging a plurality of surface-mounted wind and water cooling channels 6 and a plurality of stator wind and water communication channels 13 along the axial direction of the rotating shaft 3 of the distributed synchronous phase modulator, and the adjacent surface-mounted wind and water cooling channels 6 are communicated with the stator wind and water communication channels 13 through arc-shaped water channels 6-2.
The surface-mounted wind and water cooling channel 6 is of a semicircular hollow plate ceramic structure, a water inlet channel below one end of the hot air zone water cooler 14 of the yoke part flows into the surface-mounted wind and water cooling channel 6, and is communicated with the hot air zone surface-mounted wind and water cooling channel 6 through a stator wind shielding communicating water channel 13; the water cooling channel 6 is communicated with a cold air area surface-mounted wind and water cooling channel 6 through a plurality of sections of arc-shaped water channels 6-2; finally flows out through an outflow water channel below the hot air zone water cooler 14 of the yoke part.
Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, and a fan-shaped multi-wedge structure 6-1 is filled between a surface-mounted wind and water cooling channel 6 of a stator yoke back and rotor guard ring cascade water cooling system of a distributed synchronous phase modulator and a stator core lamination 1 of the distributed phase modulator.
The fan-shaped multi-wedge structure 6-1 plays a role in fixing the surface-mounted wind and water cooling channel 6.
Other components and connection relationships are the same as those in the second embodiment.
The fourth concrete implementation mode is as follows: the embodiment is described with reference to fig. 1, fig. 3, and fig. 4, and the rotor-side excitation winding cooling water channel of the distributed synchronous phase modifier stator yoke back and rotor retaining ring cascade water cooling system according to the embodiment is composed of a rotor cooling water channel 8, a water-cooled retaining ring 9, a cascade water channel 15, and a ring communication water channel 8-1, the rotor cooling water channel 8 is distributed in a rotor water-cooled sub-tank 3-1 of the distributed synchronous phase modifier, the rotor cooling water channel 8 is communicated with the water-cooled retaining ring 9 through the ring communication water channel 8-1, a dynamic sealing surface 8-3 is arranged on the rotor cooling water channel 8, and the dynamic sealing surface 8-3 is communicated with a yoke hot air area water cooler 14 through the cascade water channel 15.
The rotor of the distributed synchronous phase modulator is symmetrically provided with q water-cooling auxiliary grooves 3-1, the number of q water-cooling auxiliary grooves is the same as that of the excitation winding 4, the outer wall of each water-cooling auxiliary groove 3-1 is of a U-shaped structure, and the structure can increase the cooling area of the rotating shaft 3.
A cooling water channel 8 penetrates through all the water-cooling auxiliary grooves 3-1 at the end part of the rotor of the distributed synchronous phase modulator, the cooling water channel 8 is connected with a water-cooling protective ring 9 through a circular ring communication water channel 8-1, and the supporting and fixing effects on the excitation winding 4 can be realized while the temperature is reduced; a movable sealing surface 8-3 is arranged on the cooling water channel 8, and the movable sealing surface 8-3 and a yoke hot air area water cooler 14 form a communication water channel through a cascade water channel 8-2; the communicating waterway flows into a cascade waterway 15 from a water inlet channel below one end of a yoke hot air zone water cooler 14, and flows into a rotor cooling waterway 8 and a water-cooled retaining ring 9 through a circular communicating waterway 8-1 at one end by a movable sealing surface 8-3; flows into the water-cooled protective ring 9 at the other end through the rotor cooling water channel 8, and then flows out of a water channel from a movable sealing surface 8-3 on the water-cooled protective ring 9 at the other end to a yoke hot air zone water cooler 14.
Other components and connections are the same as those in the first embodiment.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 and 3, the water-cooled retaining ring 9 of the distributed synchronous phase modifier stator yoke back and rotor retaining ring cascade water-cooling system according to the embodiment is hollow, and an angular copper frame structure 9-1 for supporting is arranged in the water-cooled retaining ring 9.
By the arrangement, sufficient stress can be provided to increase the structural strength of the water-cooled retaining ring 9 while ensuring the circulation of a water channel; and the adoption of the angle copper frame structure 9-1 can effectively inhibit the oscillation of the voltage and the current of the synchronous phase modulator when the power grid is unstable, and simultaneously, the adoption of the angle copper frame structure 9-1 can enable the cooling environment of the rotor side excitation winding 4 to be better because of the good heat conducting property of copper.
Other components and connection relationships are the same as those in the fourth embodiment.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1, and the distributed cascade water cooling system for a stator yoke back and a rotor retaining ring of a synchronous phase modulator according to the embodiment further includes two mixed-flow fans 10, where the two mixed-flow fans 10 are respectively installed at two ends of the rotating shaft 3.
The mixed-flow fans 10 provide cooling air for the motor ventilation system, and the two mixed-flow fans 10 symmetrically suck the cooling air to enable the air cooling system to be symmetrically cooled by air paths.
The stator iron core 1 and the stator end winding 5 are cooled by sucking cooled air, and a multi-inlet multi-outlet air path is formed under the action of the surface-mounted wind and water cooling channel 6 through an air gap 12 and an iron core radial ventilation channel; wherein (1) the wind district is the intake air district, (2) the wind district is the air-out district, and other iron core lamination wind districts form the circulating air district under the effect of surface mounting formula wind-screen water cooling channel 6.
Other components and connections are the same as those in the first embodiment.
The seventh concrete implementation mode: the embodiment is described with reference to fig. 1, and a stator wind shielding communication water channel 13 of a stator yoke back and rotor retaining ring cascade water cooling system of the distributed synchronous phase modulator according to the embodiment leaves a gap with a stator core lamination 1 of the distributed synchronous phase modulator, and adopts a trapezoidal structure.
So set up for be close to regional air inlet district (1) wind pressure of iron core and be less than the wind zone wind pressure between surface mounting formula wind cooling channel 6 and casing 2, accelerate the regional air velocity of iron core.
Other components and connection relationships are the same as those in the second embodiment.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a water cooling system is cascaded with rotor retaining ring to distributing type synchronous phase modifier stator yoke back of body which characterized in that: the distributed cascade water cooling system for the stator yoke back and the rotor retaining ring of the synchronous phase modulator comprises a suspension type air cooler (7), a yoke hot air area water cooler (14), a stator hot air area yoke back cooling water path and a rotor side excitation winding cooling water path; the suspended air cooler (7) is arranged below a shell (2) of the distributed synchronous phase modulator, the suspended air cooler (7) is located in a closed shell (16) of the distributed synchronous phase modulator, a yoke hot air area water cooler (14) is arranged above the shell (2) of the distributed synchronous phase modulator, the yoke hot air area water cooler (14) is located in the closed shell (16) of the distributed synchronous phase modulator, a stator hot air area yoke back cooling water path is coaxially sleeved on a stator core lamination (1) of the distributed synchronous phase modulator, a rotor side excitation winding cooling water path is coaxially sleeved on a rotating shaft (3) of the distributed synchronous phase modulator, a rotor side excitation winding cooling water path is located in an air gap (12) between the rotating shaft (3) of the distributed synchronous phase modulator and the stator core lamination (1), the stator hot air area yoke back cooling water path is communicated with the rotor side excitation winding cooling water path, and the stator hot air area yoke cooling water path are communicated with the yoke hot air area water cooler (14) of the rotor hot air area excitation winding together; the stator hot wind area yoke back cooling water route comprises a plurality of surface-mounted wind-shielding water cooling channels (6) and a plurality of stator wind-shielding communicating water channels (13) which are arranged in a staggered mode along the axial direction of a rotating shaft (3) of the distributed synchronous phase modulator, and the adjacent surface-mounted wind-shielding water cooling channels (6) are communicated with the stator wind-shielding communicating water channels (13) through arc-shaped water channels (6-2).
2. The distributed cascade water cooling system of a stator yoke back and a rotor retaining ring of a synchronous phase modulator as claimed in claim 1, wherein: and a fan-shaped multi-wedge structure (6-1) is filled between the surface-mounted wind and water cooling channel (6) and the stator core lamination (1) of the distributed phase modulator.
3. The distributed cascade water cooling system of a stator yoke back and a rotor guard ring of a synchronous phase modifier as claimed in claim 1, wherein: the rotor side excitation winding cooling water channel is composed of a rotor cooling water channel (8), a water-cooled retaining ring (9), a cascade water channel (15) and a ring communicating water channel (8-1), wherein the rotor cooling water channel (8) is distributed in a rotor water-cooled auxiliary groove (3-1) of the distributed synchronous phase modulator, the rotor cooling water channel (8) is communicated with the water-cooled retaining ring (9) through the ring communicating water channel (8-1), a movable sealing surface (8-3) is arranged on the rotor cooling water channel (8), and the movable sealing surface (8-3) is communicated with a yoke hot air area water cooler (14) through the cascade water channel (15).
4. The distributed cascade water cooling system of a stator yoke back and a rotor retaining ring of a synchronous phase modulator as claimed in claim 3, wherein: the water-cooled protective ring (9) is hollow, and an angular copper frame structure (9-1) for supporting is arranged in the water-cooled protective ring (9).
5. The distributed cascade water cooling system of a stator yoke back and a rotor retaining ring of a synchronous phase modulator as claimed in claim 1, wherein: the stator wind shielding communication water channel (13) and the stator core lamination (1) of the distributed synchronous phase modulator leave a gap and adopt a trapezoidal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210483845.5A CN114825770B (en) | 2022-05-05 | 2022-05-05 | Distributed synchronous phase modulator stator yoke back and rotor retaining ring cascade water cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210483845.5A CN114825770B (en) | 2022-05-05 | 2022-05-05 | Distributed synchronous phase modulator stator yoke back and rotor retaining ring cascade water cooling system |
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| CN114825770A CN114825770A (en) | 2022-07-29 |
| CN114825770B true CN114825770B (en) | 2023-01-03 |
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| CN112564422A (en) * | 2020-12-21 | 2021-03-26 | 哈尔滨理工大学 | Outer rotor water-cooling structure of permanent magnet synchronous hub motor |
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