CN111371252A - Ventilation structure suitable for horizontal reversible generator motor - Google Patents
Ventilation structure suitable for horizontal reversible generator motor Download PDFInfo
- Publication number
- CN111371252A CN111371252A CN202010329996.6A CN202010329996A CN111371252A CN 111371252 A CN111371252 A CN 111371252A CN 202010329996 A CN202010329996 A CN 202010329996A CN 111371252 A CN111371252 A CN 111371252A
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- Prior art keywords
- variable
- fan
- air
- centrifugal fan
- ring plate
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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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a ventilation structure suitable for a horizontal reversible generator motor, which consists of a machine base, a rotor, a stator, a novel fan air guide structure, an annular air baffle, a thin-wall cylinder air baffle, a cooler, four variable-frequency centrifugal fans and an inserting plate. The section of the novel fan air guide structure adopts an arc design, and the annular air baffle and the thin-wall cylinder air baffle are arranged at the end part of the stator coil. The invention can effectively reduce ventilation loss and pressure loss, and the frequency conversion centrifugal fan is matched with the novel fan air guide structure, so that the horizontal reversible generator motor has enough air volume when running at low rotating speed. And when a centrifugal fan breaks down, the cooling air quantity required by the unit can be ensured by adjusting the air path and the rotating speed of the centrifugal fan, and the safe operation range of the unit is improved.
Description
Technical Field
The invention relates to the field of generating motors, in particular to a ventilation structure suitable for a horizontal reversible generating motor.
Background
The air cooling technology is a motor cooling technology widely adopted at present, and the motor cooled by adopting the full air has the characteristics of simple structure, low cost, convenient maintenance and the like. The small horizontal generator or motor generally adopts the forced ventilation mode of an axial flow fan. However, for a small horizontal reversible generator motor, because the motor is required to operate stably for a long time in both forward and reverse rotation, an axial fan cannot be adopted, and only a radial centrifugal fan can be adopted and matched with a corresponding fixed wind shield for use. Due to the limitation of the radial size of the unit and the structural characteristics of the centrifugal fan, the air quantity is difficult to meet the requirements due to the change of working points under different working rotating speeds. Moreover, conventional fixed windshields are complex in structure and not conducive to installation. Therefore, a new centrifugal fan air guide structure is needed to be invented, and the whole ventilation structure of the generator motor is improved, so that the pressure loss on the fan is reduced, the sufficient air volume of the generator motor can be ensured when the generator motor runs at a low rotating speed, the long-term running capability of a fault working condition is provided, and the safe running range of a unit is improved.
Disclosure of Invention
The invention aims to provide a ventilation structure suitable for a horizontal reversible generator motor. The invention is realized by adopting the following technical scheme: the variable-frequency centrifugal fan is composed of a base (1), a rotor (2), a stator (6), a novel fan air guide structure (16), an annular air baffle (15), a thin-wall cylinder air baffle (19), a cooler (8), a variable-frequency centrifugal fan (9), a variable-frequency centrifugal fan (25), a variable-frequency centrifugal fan (26), a variable-frequency centrifugal fan (27) and an inserting plate (18), wherein two variable-frequency centrifugal fans are respectively installed on two sides of the cooler (8); the air outlet of the frequency conversion centrifugal fan is fixed on a vent hole (12) of an upper cover plate (10) by a bolt, and the fixed position of the handle is sealed by a rubber pad (11); a plugboard (18) is arranged below the air outlet of the variable frequency centrifugal fan; the annular wind shield (15) is bound at the end part (24) of the stator coil, and a gap is reserved between the annular wind shield and the upper annular plate (20); the thin-wall cylinder wind shield (19) is bound at the position of the straight line section of the end part of the stator coil, which is close to the inner circle of the stator core, and a gap is reserved between the thin-wall cylinder wind shield and the upper ring plate (20).
The novel fan air guide structure (16) is composed of an upper ring plate (20), a lower ring plate (22) and fan blades (21), the upper ring plate (20) and the lower ring plate (22) are designed to be arc-shaped in cross section, and the upper ring plate and the lower ring plate are fixed on a rotating shaft (17) through bolts (23) after welding is completed.
The working principle is as follows:
the ventilation structure of the horizontal reversible generator motor consists of a base (1), a rotor (2), a stator (6), a novel fan air guide structure (16), an annular air baffle (15), a thin-wall cylinder air baffle (19), a cooler (8), a variable-frequency centrifugal fan (9), a variable-frequency centrifugal fan (25), a variable-frequency centrifugal fan (26) and a variable-frequency centrifugal fan (27); inside horizontal reversible generator motor, under four centrifugal fan's effect, the air through the cooler refrigerated gets into the motor end chamber through four vents of frame top left and right sides, then divides into two the tunnel: one path of air enters the back of the stator core (13) through the pressure finger (3); the other path is divided into two parts after passing through a novel fan air guide structure (16), one part enters between the poles of the rotor (2), the other part enters an air gap, and the two parts of air enter the back of the stator core (13) through a stator radial ventilation groove (14) together. The two paths of air are converged and then enter a cooler (8) through an air outlet (7) at the back of the stator to form a ventilation cooling loop of the horizontal reversible generator motor. Plug boards (18) are respectively arranged at the outlet positions of the four variable-frequency centrifugal fans and are used for adjusting the air path under the condition of failure.
Novel fan wind-guiding structure (16) comprises upper ring plate (20), lower crown plate (22) and fan blade (21), and upper ring plate (20) and lower crown plate (22) adopt the arc cross-section design, are fixed in pivot (17) with bolt (23) after the welding is accomplished on, drive the rotation by pivot (17).
The wind deflector comprises an annular wind deflector (15) and a thin-walled cylinder wind deflector (19). The annular wind shield (15) is bound at the end part (24) of the stator coil, and a gap is reserved between the annular wind shield and the upper annular plate (20); the thin-wall cylinder wind shield (19) is bound at the position, close to the inner circle of the stator core, of the straight line section of the end part of the stator coil, and a gap is reserved between the thin-wall cylinder wind shield and the upper ring plate (20), so that the short circuit of air in the front and at the back of the novel fan wind guide structure (16) is prevented, the structure is simplified, and the installation is facilitated.
Technical effects
1. The invention relates to a ventilation structure suitable for a horizontal reversible generator motor, wherein a variable-frequency centrifugal fan and a novel fan air guide structure are used as a pressure source for air flow together. In the operation speed interval of the generator motor, when the generator motor operates at the highest working speed, the novel fan air guide structure can meet the air volume requirement by being used alone; when the rotating speed is lower than the highest working rotating speed, four variable-frequency centrifugal fans are started to ensure that enough cooling air quantity exists during low-rotating-speed operation.
2. The ring plate and the fan blades of the novel fan air guide structure are designed to be arc-shaped cross sections, so that air can be effectively guided to flow between poles, the ventilation loss and the pressure loss are reduced, and the fan efficiency is improved.
3. Compared with a conventional fixed wind shield joint plate connecting structure, the two fixed wind shields are bound on the end parts of the stator coils, extra supporting parts are not needed, the installation is simple, the area is small, and the wind shield joint plate connecting structure has a good wind shield effect when being matched with a novel fan wind guide structure.
Drawings
FIG. 1 is a schematic view of a horizontal reversible generator motor ventilation system
FIG. 2 is a structural view of a novel fan wind-guiding structure and a wind-shielding plate
FIG. 3 is a front view of a novel fan guiding structure
Detailed Description
As shown in fig. 1, the ventilation system structure of the horizontal reversible generator motor comprises a base 1, a rotor 2, a stator 6, a novel fan air guide structure 16, an annular air baffle 15, a thin-wall cylinder air baffle 19, a cooler 8 and four variable-frequency centrifugal fans. Air outlets of the four variable-frequency centrifugal fans are fastened on the air vents of the upper cover plate 10 by bolts, and the fastened positions are sealed by rubber pads 11; a plug board structure 18 is arranged below the air outlet of the fan.
As shown in fig. 2 and 3, the new fan guiding structure 16 is composed of an upper ring plate 20, a lower ring plate 22 and fan blades 21, and is fixed to the rotating shaft 17 by bolts 23 after welding. The upper ring plate 20 and the lower ring plate 22 adopt an arc-shaped cross-section structure. The annular wind shield 15 is bound at the position of the end part 24 of the stator coil, and a gap is reserved between the annular wind shield and the upper ring plate 20; the thin-wall cylinder wind shield 19 is bound at the position of the straight line section at the end part of the stator coil, which is close to the inner circle of the stator core, and a gap is left between the thin-wall cylinder wind shield and the upper ring plate 20, so that the air between the air gap and the rotor pole is prevented from leaking out of the position.
Finally, the scope of protection of the invention is not limited to the embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (2)
1. A ventilation structure suitable for a horizontal reversible generator motor is characterized in that: the variable-frequency centrifugal fan is composed of a base (1), a rotor (2), a stator (6), a novel fan air guide structure (16), an annular air baffle (15), a thin-wall cylinder air baffle (19), a cooler (8), a variable-frequency centrifugal fan (9), a variable-frequency centrifugal fan (25), a variable-frequency centrifugal fan (26), a variable-frequency centrifugal fan (27) and an inserting plate (18), wherein two variable-frequency centrifugal fans are respectively installed on two sides of the cooler (8); the air outlet of the frequency conversion centrifugal fan is fixed on a vent hole (12) of an upper cover plate (10) by a bolt, and the fixed position of the handle is sealed by a rubber pad (11); a plugboard (18) is arranged below the air outlet of the variable frequency centrifugal fan; the annular wind shield (15) is bound at the end part (24) of the stator coil, and a gap is reserved between the annular wind shield and the upper annular plate (20); the thin-wall cylinder wind shield (19) is bound at the position of the straight line section of the end part of the stator coil, which is close to the inner circle of the stator core, and a gap is reserved between the thin-wall cylinder wind shield and the upper ring plate (20).
2. The ventilating structure for a horizontal reversible generator-motor as claimed in claim 1, wherein: the novel fan air guide structure (16) is composed of an upper ring plate (20), a lower ring plate (22) and fan blades (21), the upper ring plate (20) and the lower ring plate (22) are designed to be arc-shaped in cross section, and the upper ring plate and the lower ring plate are fixed on a rotating shaft (17) through bolts (23) after welding is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329996.6A CN111371252A (en) | 2020-04-24 | 2020-04-24 | Ventilation structure suitable for horizontal reversible generator motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329996.6A CN111371252A (en) | 2020-04-24 | 2020-04-24 | Ventilation structure suitable for horizontal reversible generator motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111371252A true CN111371252A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010329996.6A Pending CN111371252A (en) | 2020-04-24 | 2020-04-24 | Ventilation structure suitable for horizontal reversible generator motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113675994A (en) * | 2021-07-28 | 2021-11-19 | 大连钰霖电机有限公司 | Box-type motor air direct cooling structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694437A (en) * | 2011-03-22 | 2012-09-26 | 张伟 | Cooling device used for generators |
| CN202931112U (en) * | 2012-12-05 | 2013-05-08 | 湘电集团有限公司 | Cooling and protecting apparatus of horizontal motor |
| CN206302257U (en) * | 2016-12-16 | 2017-07-04 | 卧龙电气集团股份有限公司 | A kind of York special opening formula threephase asynchronous wind guiding mechanism |
| CN110429761A (en) * | 2019-08-27 | 2019-11-08 | 中船重工电机科技股份有限公司 | It can effectively reduce double wind path structures of high-power wide revolving speed variable-frequency motor temperature rise |
-
2020
- 2020-04-24 CN CN202010329996.6A patent/CN111371252A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694437A (en) * | 2011-03-22 | 2012-09-26 | 张伟 | Cooling device used for generators |
| CN202931112U (en) * | 2012-12-05 | 2013-05-08 | 湘电集团有限公司 | Cooling and protecting apparatus of horizontal motor |
| CN206302257U (en) * | 2016-12-16 | 2017-07-04 | 卧龙电气集团股份有限公司 | A kind of York special opening formula threephase asynchronous wind guiding mechanism |
| CN110429761A (en) * | 2019-08-27 | 2019-11-08 | 中船重工电机科技股份有限公司 | It can effectively reduce double wind path structures of high-power wide revolving speed variable-frequency motor temperature rise |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113675994A (en) * | 2021-07-28 | 2021-11-19 | 大连钰霖电机有限公司 | Box-type motor air direct cooling structure |
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