CN109921567B - Rotor alternate type air supplement system of large synchronous phase modulator - Google Patents
Rotor alternate type air supplement system of large synchronous phase modulator Download PDFInfo
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- CN109921567B CN109921567B CN201910371688.7A CN201910371688A CN109921567B CN 109921567 B CN109921567 B CN 109921567B CN 201910371688 A CN201910371688 A CN 201910371688A CN 109921567 B CN109921567 B CN 109921567B
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Abstract
A rotor alternate type air supplement system of a large synchronous phase modulator belongs to the technical field of motors. The invention aims to solve the problem that a rotor generates heat when a phase modifier is excited in an extra-high voltage direct current transmission system, provides an air supplementing type cooling structure to fully cool a motor rotor, a centrifugal strong pressure fan and an axial flow type air suction fan are installed at the end part of the rotor, the rotor is provided with an air inlet auxiliary groove and an air outlet auxiliary groove, the radial air channels of the air inlet auxiliary groove and the air outlet auxiliary groove realize air path butt joint through a horn type air channel in a suspension type cooler, gas output by the radial air channel of the air inlet auxiliary groove is output to the radial air channel of the air outlet auxiliary groove through the horn type air channel, the horn type air channel plays a role of alternately supplementing cold air, hot air direct cooling of the air outlet auxiliary groove is realized, the cooling effect of the side of the rotor is improved, the suspension type cooler is directly connected with an external cooler, the phase modifier rotor alternately supplementing type air supplementing system provided by the invention enhances the cooling effect of the, the realization is convenient.
Description
Technical Field
The invention relates to a rotor air supplement system of a synchronous phase modifier, in particular to a rotor alternate type air supplement system of a large-scale synchronous phase modifier, and belongs to the technical field of motors.
Background
The large synchronous phase modulator for the extra-high voltage power transmission system has the rapid dynamic response capability and the strong excitation capability, the excitation voltage reaches 3.5 times of rated value, and the strong excitation current is 2.5 times of rated excitation current; in addition, the phase modulator of the extra-high voltage converter station requires that the motor overload capacity is higher than the motor overload capacity specified by the technical requirements of the non-salient pole synchronous generator and far exceeds the international standard; therefore, the rotor cooling structure needs to be optimized, the overload capacity of the rotor cooling structure is improved, the phase modulator winding is guaranteed not to be deformed harmfully, and the temperature rise of the end structure is controlled in a reasonable range.
The progress of the cooling technology of the rotor ventilation system of the large synchronous phase modulator is of particular significance to ultra-high voltage direct current transmission. However, in the prior art, the problem of overhigh temperature at the side of the rotor in the process of motor forced excitation and rapid dynamic regulation still exists due to the unreasonable ventilation design of the large synchronous phase modulator.
Disclosure of Invention
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
In view of the above, the invention provides an alternating type air supplement system for efficiently and rapidly reducing the side temperature rise of a rotor of a large phase modulation machine, so as to solve the problems of overhigh temperature at the side of the rotor in the processes of motor forced excitation and rapid dynamic adjustment caused by unreasonable ventilation design of the large synchronous phase modulation machine, so that the rotor of the motor is sufficiently cooled, a centrifugal strong pressure fan and an axial flow type air suction fan are arranged at the end part of the rotor, the rotor is provided with an air inlet auxiliary groove and an air outlet auxiliary groove, the radial air channels of the air inlet auxiliary groove and the air outlet auxiliary groove are butted through a horn type air channel in a suspension type cooler, gas output by the radial air channel of the air inlet auxiliary groove is output to the radial air channel of the air outlet auxiliary groove through the horn type air channel, the horn type air channel plays a role of alternately supplementing cold air, the direct cooling of hot air of the.
The technical means adopted by the invention are as follows:
a rotor alternating type air supplement system of a large synchronous phase modulator comprises a stator core, a rotating shaft, a centrifugal strong pressure fan, an external cooler, an end winding, a stator base and a rotor retaining ring, wherein the stator core is arranged in the stator base, the rotating shaft is arranged in the stator core, an air gap is formed between the stator core and the stator core, the rotor retaining ring is sleeved on the rotating shaft, the end winding is arranged on the stator core, and the external cooler is arranged outside the stator base;
the alternating air supplement system also comprises a suspension type cooler, an axial flow type air suction fan, a communicating device and a fan wind-guard ring, wherein a centrifugal type forced draft fan, the axial flow type air suction fan and the fan wind-guard ring are arranged on a rotating shaft;
an air inlet auxiliary groove and an air outlet auxiliary groove are arranged on the rotating shaft, the air inlet auxiliary groove and the air outlet auxiliary groove are not communicated in the rotating shaft, the air inlet auxiliary groove comprises an air inlet auxiliary groove axial air channel and an air inlet auxiliary groove radial air channel, the air outlet auxiliary groove comprises an air outlet auxiliary groove axial air channel and an air outlet auxiliary groove radial air channel, the air inlet auxiliary groove axial air channel is communicated with the air inlet auxiliary groove radial air channel, the air outlet auxiliary groove axial air channel is communicated with the air outlet auxiliary groove radial air channel, a stator radial air channel is arranged on a stator iron core, a horn-shaped air channel and an air inlet auxiliary groove radial air channel are arranged in the suspension, cooling media in the radial air duct of the air outlet auxiliary groove form a loop through an inner horn type air duct of the suspension type cooler, a centrifugal strong pressure fan separately presses cooling air into different parts of the motor, one path of cooling air flows to the end winding, and the cooling air flows into a stator radial air duct of the stator core at the outer side of the suspension type cooler and then enters an external cooler; the other path of cooling air flows to the axial air channel of the air inlet auxiliary groove, the axial flow type air suction fan sucks the cooling air out of the axial air channel of the air outlet auxiliary groove, and the cooling air pressed out by the centrifugal type forced draft fan and the cooling air sucked out by the axial flow type air suction fan are isolated through a fan wind blocking ring.
Further: the suspended cooler is of a thin-tube structure, the area of an air inlet of the ox horn-type air channel is larger than that of an air outlet, the radial air channel of the air inlet auxiliary channel is aligned with the air inlet of the ox horn-type air channel, and the radial air channel of the air outlet auxiliary channel is aligned with the air outlet of the ox horn-type air channel. The cooling gas directly gets rid of hot air into the wind inlet of the ox horn type air channel of the suspension type cooler through the radial air channel of the air inlet auxiliary channel through the axial air channel of the air inlet auxiliary channel, after the hot air is cooled by the suspension type cooler, the hot air flows out from the air outlet of the ox horn type air channel of the suspension type cooler, the cold air flowing out enters the radial air channel of the air outlet auxiliary channel again, the rotor is cooled, finally, the cold air flows out through the axial air channel of the air outlet auxiliary channel, along the axial direction, the hot air is directly cooled by the suspension type cooler in the ox horn type air channel, the cold air after cooling is continuously thrown out, the cold air thrown out is directly supplemented to the rotating shaft side, and the cooling gas continuously circulates in turns at the rotating shaft side, and does not pass through the stator core, the suspension type cooler directly isolates the cooling gas between the.
Further: the axial air duct of the air inlet auxiliary groove gradually narrows along the axial direction, and the axial air duct of the air outlet auxiliary groove gradually widens along the axial direction.
Further: the number of the ox horn-shaped air ducts is 30-40 along the axial direction.
Further: the inner wall of the oxhorn-type air duct in the suspension type cooler is provided with a convex lug.
Further: the alternating air supplement system also comprises an air gap wind blocking ring, and the air gap wind blocking ring is arranged on the rotor guard ring. The air gap wind blocking ring blocks cooling air which is pressed to the outer side of the suspension type cooler by the centrifugal strong pressure fan and flows into a stator radial ventilation channel of the stator core from being shunted to the outer surface of the rotating shaft.
The invention achieves the following effects:
the rotor temperature of the large phase modulator is relatively high in the strong excitation and quick dynamic response processes, the safe and stable operation of the large phase modulator is severely limited by a traditional ventilation cooling system, and the improvement of the cooling technology of the rotor ventilation system of the large synchronous phase modulator is of great significance to ultra-high voltage direct current transmission. Therefore, the invention provides a rotor alternate type air supplement system of a large-scale synchronous phase modifier, which aims at the problems of a phase modifier rotor ventilation cooling system for extra-high voltage transmission engineering, the rotor of a motor is fully cooled, a centrifugal strong pressure fan and an axial flow type air suction fan are arranged at the end part of the rotor, the rotor is provided with an air inlet auxiliary groove and an air outlet auxiliary groove, radial air channels of the air inlet auxiliary groove and the air outlet auxiliary groove realize air path butt joint through a ox horn type air channel in a suspension type cooler, gas output by the radial air channel of the air inlet auxiliary groove is output to the radial air channel of the air outlet auxiliary groove through the ox horn type air channel, the ox horn type air channel plays the role of alternately supplementing cold air, hot air thrown out of the rotor of the large-scale phase modifier is quickly cooled, the hot air is timely supplemented into the rotor again as cold air, the capability of taking away heat at the rotor side of the phase modifier is effectively enhanced, and the highest, reduce phase modulation machine rotor side thermal deformation, promoted rotor side cooling effect.
Drawings
FIG. 1 is an axial cross-sectional view of a rotor alternating air supplement system for a large synchronous phase modifier according to the present invention;
FIG. 2 is a schematic view of a ox horn-shaped air duct;
in the figure: 1-air inlet auxiliary groove, 2-air outlet auxiliary groove, 3-suspension type cooler, 4-stator iron core, 5-rotating shaft, 6-centrifugal strong pressure fan, 7-axial flow type air suction fan, 8-external cooler, 9-communicating vessel, 10-end winding, 11-stator radial ventilation channel, 12-air gap, 13-fan wind-blocking ring, 14-air gap wind-blocking ring, 15-stator base, 16-rotor guard ring, 1-air inlet auxiliary groove, 1-1 air inlet auxiliary groove axial air channel, 1-2 air inlet auxiliary groove radial air channel, 2-air outlet auxiliary groove, 2-1 air outlet auxiliary groove axial air channel, 2-2 air outlet auxiliary groove radial air channel;
the arrows in the figure show the flow direction of cooling gas in a large synchronous phase modulator rotor alternating air make-up system.
Detailed Description
In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the application document, and other details not closely related to the present invention are omitted.
Example (b): referring to fig. 1 and 2, the rotor alternating type air supplement system of the large synchronous phase modulator of the embodiment comprises an air inlet auxiliary groove 1, an air outlet auxiliary groove 2, a suspension type cooler 3, a stator core 4, a rotating shaft 5, a centrifugal strong pressure fan 6, an axial flow type air suction fan 7, an external cooler 8, a communicating vessel 9, an end winding 10, a stator radial air duct 11, an air gap 12, a fan wind blocking ring 13, an air gap wind blocking ring 14, a stator base 15 and a rotor guard ring 16, wherein the air inlet auxiliary groove 1 comprises an air inlet auxiliary groove axial air duct 1-1 and an air inlet auxiliary groove radial air duct 1-2, the air outlet auxiliary groove 2 comprises an air outlet auxiliary groove axial air duct 2-1, an air outlet auxiliary groove radial air duct 2-2, the air inlet auxiliary groove axial air duct 1-1 is communicated with the air inlet auxiliary groove radial air duct 1-2, the air outlet auxiliary groove axial air duct 2-1 is communicated with the air outlet auxiliary groove radial air duct, the air inlet auxiliary groove 1 and the air outlet auxiliary groove 2 are not communicated in the rotating shaft, a fan wind-blocking ring 13 is arranged on the rotating shaft 5, the axial flow type induced draft fan 7 is sleeved in the fan wind-blocking ring 13, and an air gap wind-blocking ring 14 is arranged on a rotor protective ring 16; the stator core 4 is mounted in a stator frame 15, and the stator radial air ducts 11 communicate with the external cooler 8.
In addition, according to an implementation manner, the present embodiment is described with reference to fig. 1, and according to the rotor alternating type air supplement system of the large synchronous phase modulator in the present embodiment, the centrifugal high-pressure fan 6 divides the cooling air into multiple paths to be pressed into different parts of the motor, one path of the cooling air flows to the end winding 10, the other path of the cooling air flows to the air inlet auxiliary slot 1, the other path of the cooling air flows to the stator radial ventilation duct 11 of the stator core 4 outside the suspended cooler 3, the axial flow type air suction fan 7 sucks the cooling air out of the air outlet auxiliary slot 2 from the air outlet auxiliary slot axial direction air duct 2-1, and the cooling air pressed out by the centrifugal high-pressure fan 6 and the cooling air sucked out by the axial flow type air suction fan 7 are isolated by the.
In addition, according to an implementation manner, the present embodiment is described with reference to fig. 1, and according to the present embodiment, the air inlet sub-slot 1 and the air outlet sub-slot 2 are completely separated in the physical structure of the rotating shaft 5, the air inlet sub-slot 1 and the air outlet sub-slot are in a non-communicating structure, the cooling gas inside the air inlet sub-slot 1 and the air outlet sub-slot are communicated through a horn-shaped air duct 3-1 of the suspension type cooler 3, so that the cooling gas is communicated, the air inlet sub-slot axial air duct 1-1 is gradually narrowed along the axial direction, and the air outlet sub-slot axial air duct 2-1 is gradually widened along the axial direction.
In addition, according to an implementation manner, referring to fig. 1 and fig. 2, the present embodiment is described, and the rotor alternating type air supplement system of the large synchronous phase modulation machine according to the present embodiment is described, wherein the suspension type cooler 3 is of a thin-tube structure, the suspension type cooler 3 is disposed in an air gap 12 between a stator core 4 and a rotating shaft 5, an ox-horn type air duct 3-1 is disposed in the suspension type cooler 3, a cooling medium in an inlet auxiliary groove radial air duct 1-2 and an outlet auxiliary groove radial air duct 2-2 forms a loop through the ox-horn type air duct 3-1 in the suspension type cooler 3, a cooling gas directly throws hot air into the inlet 3-1-1 of the ox-horn type air duct 3-1 of the suspension type cooler 3 through the inlet auxiliary groove axial air duct 1-1 and the inlet auxiliary groove radial air duct 1-2, and the hot air is cooled by the suspension type cooler 3, the cooling air flows out from an air outlet 3-1-2 of an air channel 3-1 of a horn type of the suspension type cooler 3, the flowing cold air enters a radial air channel 2-2 of an air outlet auxiliary channel, the rotor is cooled, finally, the cold air flows out from the axial air channel 2-1 of the air outlet auxiliary channel, hot air is directly cooled in the horn type air channel 3-1 through the suspension type cooler 3 along the axial direction, the cooled cold air is continuously thrown away, the thrown cold air is directly supplemented to the side of a rotating shaft 5, the cooling air continuously circulates in turns at the side of the rotating shaft 5 and does not pass through a stator iron core 4, the suspension type cooler 3 directly isolates the cooling air between the stator iron core 4 and the rotating shaft 5, and the stator iron core 4 and the rotating shaft 5 do not have direct exchange of the.
In addition, according to an implementation manner, referring to fig. 1 and fig. 2, the present embodiment is described, and according to the rotor alternating type air supplement system of the large synchronous phase modulator described in the present embodiment, the area of the air inlet 3-1-1 of the ox horn type air duct 3-1 is larger than the area of the air outlet 3-1-2, the number of the air inlets along the axial direction is 30-40, the radial air duct 1-2 of the air inlet auxiliary groove is aligned with the air inlet 3-1-1 of the ox horn type air duct 3-1, and the radial air duct 2-2 of the air outlet auxiliary groove is aligned with the air outlet 3-1-2 of the ox horn type air duct 3-1.
In addition, according to an implementation mode, the embodiment is described with reference to fig. 1 and fig. 2, and the rotor alternating type air supplement system of the large synchronous phase modulator according to the embodiment is characterized in that the inner wall of the inner horn-shaped air duct 3-1 of the suspension cooler 3 is provided with a convex lug 3-2, and the suspension cooler 3 is directly communicated with an outer cooler 8 of a stator core through a communicating device 9.
In addition, according to one implementation mode, the present embodiment is described with reference to fig. 1, and in the rotor alternating type air supplement system of the large synchronous phase modulator according to the present embodiment, the air gap wind blocking ring 14 blocks the cooling air, which is forced to the outside of the suspension cooler 3 by the centrifugal forced draft fan 6 and flows into the stator radial air duct 11 of the stator core 4, from being branched to the outer surface of the rotating shaft 5.
Although the embodiments of the present invention have been described above, the contents thereof are merely embodiments adopted to facilitate understanding of the technical aspects of the present invention, and are not intended to limit the present invention. It will be apparent to persons skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A rotor alternating type air supplement system of a large synchronous phase modulator comprises a stator core (4), a rotating shaft (5), a centrifugal forced draft fan (6), an external cooler (8), an end winding (10), a stator base (15) and a rotor guard ring (16), wherein the stator core (4) is installed in the stator base (15), the rotating shaft (5) is installed in the stator core (4), an air gap (12) is formed between the stator core and the external cooler (5), the rotor guard ring (16) is sleeved on the rotating shaft (5), the end winding (10) is installed on the stator core (4), and the external cooler (8) is installed outside the stator base (15);
the method is characterized in that: the alternating air supplement system further comprises a suspension cooler (3), an axial flow type induced draft fan (7), a communicating vessel (9) and a fan wind blocking ring (13), wherein a centrifugal type strong pressure fan (6), the axial flow type induced draft fan (7) and the fan wind blocking ring (13) are installed on the rotating shaft (5), the axial flow type induced draft fan (7) is sleeved inside the fan wind blocking ring (13), the centrifugal type strong pressure fan (6) is arranged outside the fan wind blocking ring (13), the suspension cooler (3) is arranged in an air gap (12) between the stator iron core (4) and the rotating shaft (5), and the suspension cooler (3) is directly communicated with an external cooler (8) of the stator iron core (4) through the communicating vessel (9);
an air inlet auxiliary groove (1) and an air outlet auxiliary groove (2) are formed in a rotating shaft (5), the air inlet auxiliary groove (1) and the air outlet auxiliary groove (2) are not communicated in the rotating shaft, the air inlet auxiliary groove (1) comprises an air inlet auxiliary groove axial air duct (1-1) and an air inlet auxiliary groove radial air duct (1-2), the air outlet auxiliary groove (2) comprises an air outlet auxiliary groove axial air duct (2-1) and an air outlet auxiliary groove radial air duct (2-2), the air inlet auxiliary groove axial air duct (1-1) is communicated with the air inlet auxiliary groove radial air duct (1-2), the air outlet auxiliary groove axial air duct (2-1) is communicated with the air outlet auxiliary groove radial air duct (2-2), a stator radial air duct (11) is formed in a stator iron core (4), a horn-type air duct (3-1) is arranged in a suspension type cooler (3), the air inlet auxiliary groove radial air duct (1-2, Cooling media in the radial air duct (2-2) of the air outlet auxiliary groove form a loop through an inner horn type air duct (3-1) of the suspension type cooler (3), a centrifugal forced draft fan (6) separately presses cooling air into different parts of the motor, one path of cooling air flows to an end winding (10), and the cooling air flows into a stator radial air duct (11) of the stator iron core (4) at the outer side of the suspension type cooler (3) and then enters an external cooler (8); the other path of cooling air flows to the axial air channel (1-1) of the air inlet auxiliary groove, the axial flow type air suction fan (7) sucks the cooling air out of the axial air channel (2-1) of the air outlet auxiliary groove, and the cooling air pressed out by the centrifugal type strong pressure fan (6) and the cooling air sucked out by the axial flow type air suction fan (7) are isolated through a fan wind blocking ring (13).
2. The rotor-alternating air supplement system of the large synchronous phase modifier as claimed in claim 1, wherein: the suspended cooler (3) is of a thin-tube structure, the area of an air inlet (3-1-1) of the ox horn-shaped air channel (3-1) is larger than that of an air outlet (3-1-2), the radial air channel (1-2) of the air inlet auxiliary groove is aligned with the air inlet (3-1-1) of the ox horn-shaped air channel (3-1), and the radial air channel (2-2) of the air outlet auxiliary groove is aligned with the air outlet (3-1-2) of the ox horn-shaped air channel (3-1).
3. The rotor-alternating air supplement system of the large synchronous phase modifier as claimed in claim 2, wherein: the axial air duct (1-1) of the air inlet auxiliary groove gradually narrows along the axial direction, and the axial air duct (2-1) of the air outlet auxiliary groove gradually widens along the axial direction.
4. A rotor-alternating air supplement system for large synchronous phase modulators as claimed in claim 3, wherein: the number of the ox horn-shaped air ducts (3-1) is 30-40 along the axial direction.
5. The rotor-alternating air supplement system of the large synchronous phase modifier as claimed in claim 4, wherein: the inner wall of the inner horn-type air duct (3-1) of the suspension type cooler (3) is provided with a convex lug (3-2).
6. A rotor-alternating air supplement system for large synchronous phase modulators according to any of claims 1-5, characterized in that: the alternating type air supplementing system further comprises an air gap wind blocking ring (14), and the air gap wind blocking ring (14) is installed on the rotor guard ring (16).
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| CN201910371688.7A CN109921567B (en) | 2019-05-06 | 2019-05-06 | Rotor alternate type air supplement system of large synchronous phase modulator |
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| CN201910371688.7A CN109921567B (en) | 2019-05-06 | 2019-05-06 | Rotor alternate type air supplement system of large synchronous phase modulator |
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| CN109921567A CN109921567A (en) | 2019-06-21 |
| CN109921567B true CN109921567B (en) | 2019-12-24 |
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| CN111046539B (en) * | 2019-11-27 | 2023-09-26 | 上海电气电站设备有限公司 | Water-cooled rotor forced excitation temperature rise calculation method based on instantaneous movement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS59175353A (en) * | 1983-03-23 | 1984-10-04 | Yaskawa Electric Mfg Co Ltd | Cooler of rotary electric machine |
| CN2560151Y (en) * | 2002-01-10 | 2003-07-09 | 武汉三维汽轮电机股份有限公司 | Large indoor cooled steam turbogenerator cooling structure |
| CN101123380B (en) * | 2007-05-25 | 2010-10-27 | 中国科学院电工研究所 | Steamship generator with rotor free cooling and stator evaporation cooling |
| CN202183689U (en) * | 2011-07-30 | 2012-04-04 | 南阳防爆集团股份有限公司 | Internal wind path structure for 2-pole motor |
| CN102983678A (en) * | 2012-11-14 | 2013-03-20 | 哈尔滨电机厂有限责任公司 | Electric generator cooling wind path structure |
| CN103023217B (en) * | 2012-12-18 | 2015-06-10 | 上海电机学院 | Overall machine wind path structure of high-power and high-peed permanent magnet synchronous motor |
| CN203387357U (en) * | 2013-07-31 | 2014-01-08 | 广东鸿源众力发电设备有限公司 | Centralized open ventilation and cooling system of bulb through-flow type hydraulic turbine generator |
| CN206542299U (en) * | 2016-12-22 | 2017-10-03 | 哈尔滨理工大学 | A kind of compact medium-sized high pressure motor of novel cooling structure |
| CN207559750U (en) * | 2017-10-25 | 2018-06-29 | 石家庄金士顿轴承科技有限公司 | A kind of high-speed permanent magnet motor direct connection centrifugal blower heat sink |
| CN208571857U (en) * | 2018-05-21 | 2019-03-01 | 广东上水能源科技有限公司 | A kind of motor cooling based on coolant liquid |
| CN108448818A (en) * | 2018-05-21 | 2018-08-24 | 广东上水能源科技有限公司 | A kind of brushless dual-feed motor cooling structure based on coolant liquid |
| CN108429403A (en) * | 2018-05-21 | 2018-08-21 | 广东上水能源科技有限公司 | A kind of motor based on coolant liquid is from driving cooling structure |
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