CN209761615U - Cooling tower water turbine with permanent magnet power compensation device - Google Patents
Cooling tower water turbine with permanent magnet power compensation device Download PDFInfo
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- CN209761615U CN209761615U CN201920570949.3U CN201920570949U CN209761615U CN 209761615 U CN209761615 U CN 209761615U CN 201920570949 U CN201920570949 U CN 201920570949U CN 209761615 U CN209761615 U CN 209761615U
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Abstract
a cooling tower water turbine with a permanent magnet power compensation device comprises a main shaft (1), wherein one end of the main shaft (1) extends into a water turbine runner (2) and is provided with a water turbine runner (3), the other end of the main shaft is provided with a fan blade, and the middle section of the main shaft (1) is arranged in an upper bearing (4) and a lower bearing (5), and is characterized in that a permanent magnet (9) is arranged on the main shaft section between an upper bearing seat and a lower bearing seat, a rotor core (10) is arranged on the outer side of the permanent magnet (9), a stator core (11) is fixed on the inner side of a bearing seat shell formed by the upper bearing seat and the lower bearing seat, a stator winding (12) is wound on the stator core (11), and the stator winding (12) is connected with a; the permanent magnet (9), the rotor core (10), the stator core (11) and the stator winding (12) form a permanent magnet power compensation device of the motor. The utility model discloses simple structure, the compensation is reliable, can improve the stability and the reliability of system's motion.
Description
Technical Field
The utility model relates to a cooling tower energy-saving technology, especially a cooling tower for heat transfer device with water as the medium, specifically speaking are take permanent magnetism power compensation arrangement's cooling tower hydraulic turbine.
background
As is well known, in the fields of petrochemical industry, central air conditioning and the like, a heat exchange device using water as a refrigerant needs to cool circulating water after heat exchange, and cooling the circulating water passing through a cooling tower by using an axial flow fan is a common technical means, so that the axial flow fan needs to operate for a long time and consumes a large amount of energy. Therefore, chinese patent 021111693 utility model discloses an utilize circulating water pressure drive hydraulic turbine, recycle hydraulic turbine and drive fan blade pivoted technique, realized energy-conserving effect, can save a large amount of fan power loss annually, this kind of technique has obtained fine popularization and application at present, and energy-conserving effect is very showing, and the noise has also obtained the improvement that is showing simultaneously. According to measurement and calculation, the reconstruction investment can be recovered by saving the electric charge only by one to two years.
After years of practice, the applicant finds that the existing water turbine technology has certain limitations, for example, if the surplus pressure in a circulating water system is insufficient, the output shaft power of the water turbine utilizing the surplus pressure is not enough to push a fan of a cooling tower to reach the rated rotating speed, so that the cooling effect of the cooling tower is reduced, and the production process requirement is influenced. If the fan reaches the rated rotating speed, the water supply pressure of the system is increased, so that the circulating water quantity of the system is reduced, the heat exchange effect of the heat exchange device is reduced, and the normal operation of production is influenced. For this, there is often no good solution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at current circulating water system is not enough because of surplus pressure, leads to hydraulic turbine output shaft power to be less than fan rated power and can not reach rated revolution to influence the problem that cooling effect and system operation are stable, design one kind can be when the surplus pressure of system is not enough, the cooling tower hydraulic turbine of taking permanent magnetism power compensation arrangement that initiative compensation main shaft power made it keep steady operation under rated revolution.
the technical scheme of the utility model is that:
a cooling tower water turbine with a permanent magnet power compensation device comprises a main shaft 1, one end of the main shaft 1 extends into a water turbine runner 2 and is provided with a water turbine runner 3, the other end of the main shaft is provided with a fan blade, the middle section of the main shaft 1 is arranged in an upper bearing 4 and a lower bearing 5, the upper bearing 4 is arranged in an upper bearing seat 6, the lower bearing 5 is arranged in a lower bearing seat 7, the lower bearing seat 7 is fixed on a water turbine shell 8, the upper bearing seat and the lower bearing seat are connected through a connecting piece, and the cooling tower water turbine is characterized in that a permanent magnet 9 is arranged on the main shaft section between the upper bearing seat and the lower bearing seat, a rotor core 10 is arranged on the outer side of the permanent magnet 9, a stator core 11 is fixed on the inner side of a bearing seat shell consisting of the upper bearing seat and the lower; the permanent magnet 9, the rotor core 10, the stator core 11 and the stator winding 12 form an electric permanent magnet power compensation device.
The power supply control device can start a power supply to supply power to the stator winding when the water turbine needs power compensation, so that a main shaft of the water turbine obtains extra shaft power compensation, the main shaft rotates at a set rotating speed, when the power compensation is not needed, a stator winding power supply line is disconnected, the stator winding does not work, meanwhile, the closed state of a stator winding coil is also cut off when the power supply line is disconnected, and the permanent magnetic field cannot enable the stator winding to generate current, so that the reduction of the output shaft power of the main shaft is avoided.
And a bearing seat shell consisting of the upper bearing seat and the lower bearing seat is provided with a cooling liquid channel 15, an inlet 13 of the cooling liquid channel 15 is communicated with the water outlet of the cooling tower, and the water absorbing heat through the cooling liquid channel 15 is discharged out of the bearing seat shell through a cooling liquid outlet 14.
The compensation power W 2 (unit is kW) of the permanent magnet power compensation device is as follows:
W2=(W1/η1-9.81×Q×H)/η2
In the formula, W 1 is the power of a fan shaft, Q is the flow rate of a water turbine, the unit is m 3/s, H is the surplus pressure of the system, the unit is m, eta 1 is the efficiency of the water turbine, and eta 2 is the transmission efficiency of the compensating device.
The utility model has the advantages that:
the utility model discloses can play the offset to the hydraulic turbine when the surplus pressure of system is not enough, ensure that the cooling tower fan is required shaft power under rated wind volume condition, the technical key point is the summer compensation, other uncompensations of season to obtain energy-conservation and environmental protection purpose.
The utility model discloses can play the auxiliary action when the abundant pressure of system is not enough or summer fan full load operation, reach circulating water technological requirement and energy-conserving purpose, it is applicable to the circulating water system cooling tower under any state.
The utility model discloses simple structure, it is convenient to realize, has solved the difficult problem of long-term restriction system steady operation, is showing the stability that improves system operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1.
A cooling tower water turbine with a permanent magnet power compensation device comprises a main shaft 1, one end of the main shaft 1 extends into a water turbine runner 2 and is provided with a water turbine runner 3, the other end of the main shaft is provided with a fan blade, the middle section of the main shaft 1 is arranged in an upper bearing 4 and a lower bearing 5, the upper bearing 4 is arranged in an upper bearing seat 6, the lower bearing 5 is arranged in a lower bearing 7, the lower bearing seat 7 is fixed on a water turbine shell 8, the upper bearing seat and the lower bearing seat are connected through a connecting piece, the cooling tower water turbine is characterized in that a permanent magnet 9 is arranged on the main shaft section between the upper bearing seat and the lower bearing seat, a rotor core 10 is arranged on the outer side of the permanent magnet 9, a stator core 11 is fixed on the inner side of a bearing seat shell consisting of the upper bearing seat and the lower bearing seat, a stator winding 12 is wound on the stator core 11, the power supply control device can start a power supply to supply power to the stator winding when the water turbine needs power compensation, so that a main shaft of the water turbine obtains extra shaft power compensation, the main shaft rotates at a set rotating speed, when the power compensation is not needed, a stator winding power supply line is disconnected, the stator winding does not work, meanwhile, the closed state of a stator winding coil is also cut off when the power supply line is disconnected, and the permanent magnetic field cannot enable the stator winding to generate current, so that the reduction of the output shaft power of the main shaft is avoided. The permanent magnet 9, the rotor core 10, the stator core 11 and the stator winding 12 form an electric permanent magnet power compensation device. In order to prevent the electric permanent magnet power compensation device from generating heat during operation and influencing the efficiency and the service life, during specific implementation, a bearing seat shell consisting of an upper bearing seat and a lower bearing seat is also provided with a cooling liquid channel 15, an inlet 13 of the cooling liquid channel 15 is communicated with the water outlet of a cooling tower, and the water absorbing heat through the cooling liquid channel 15 is discharged out of the bearing seat shell through a cooling liquid outlet 14.
The details are as follows:
The utility model discloses a water turbine is mainly energy-conserving upgrading of circulating water system cooling tower, as long as there is surplus pressure (if potential pressure, valve shut pressure etc.) in the circulating water system and can be utilized by the water turbine, accessible energy compensation mode compensates under the not enough condition of system surplus pressure, obtains the required shaft power of fan to can both reach energy-conserving purpose under any operating mode condition.
The utility model solves the pressure loss caused by the valve closing state in the circulating water system, so that the fluid is smooth and does not generate vortex and vibration; the utility model discloses an add electronic compensation arrangement of permanent magnetism and play the offset to the hydraulic turbine when the surplus pressure of system is not enough, ensure that the cooling tower fan is required shaft power under rated wind volume condition, and the technical key point is the compensation in summer, and other uncompensations are not used in season to obtain energy-conserving and environmental protection purpose.
The utility model discloses establish a permanent magnetism electric actuator at hydraulic turbine bearing room, permanent magnetism embedding hydraulic turbine main shaft is as the rotor, and coil winding embedding bearing frame makes the main shaft reach power compensation through the electric drive main shaft as the stator to improve hydraulic turbine output shaft power, make the hydraulic turbine reach the required rated revolution of fan.
When the surplus pressure of the circulating water system is insufficient, the permanent magnet electric compensation device is started to compensate the surplus energy insufficient part, so that the fan reaches the rated rotating speed, when the surplus pressure of the system is sufficient, the permanent magnet electric compensation device can be stopped, and when the cooling effect of the cooling tower is insufficient in summer, the compensation device can be started to increase the air volume and the cooling effect.
The compensation device is connected with a power supply control device, when the water turbine needs power compensation, a power supply stator winding is started, a main shaft of the water turbine obtains required shaft power, when the power compensation is not needed, a winding power supply line is disconnected, the winding does not work, in addition, the closed state of a winding coil is also cut off when the power supply line is disconnected, the permanent magnetic field cannot enable the winding to generate current, and therefore the reduction of the output shaft power of the main shaft is avoided.
The compensation device is also provided with a winding cooling device, cooling water discharged from a cooling tower of the circulating water system is used for cooling the winding, the temperature of the cooling water in summer is about 30 ℃, the water quantity is sufficient, and the temperature drop of the winding is sufficiently ensured.
the utility model discloses a theoretical calculation of energy compensation (the energy compensation principle is the consumption minimum energy):
And (3) calculating the compensation power consumption of the compensation device:
Setting the power of a fan shaft as W 1, the operating power of a compensating device as W 2, the flow of a water turbine as Q, the surplus pressure of a system as H, the efficiency of the water turbine as eta 1 and the transmission efficiency of the compensating device as eta 2, and selecting the power consumption of the compensating device as follows:
W2=(W1/η1-9.81×Q×H)/η2
In the formula, the unit of power is kW, the unit of flow Q is m 3/s, and the unit of pressure H is m.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (4)
1. A cooling tower water turbine with a permanent magnet power compensation device comprises a main shaft (1), one end of the main shaft (1) extends into a water turbine runner (2) and is provided with a water turbine blade (3), the other end of the main shaft is provided with a fan blade, the middle section of the main shaft (1) is arranged in an upper bearing (4) and a lower bearing (5), the upper bearing (4) is arranged in an upper bearing seat (6), the lower bearing (5) is arranged in a lower bearing seat (7), the lower bearing seat (7) is fixed on a water turbine shell (8), the upper bearing seat and the lower bearing seat are connected through a connecting piece, and the cooling tower water turbine is characterized in that a permanent magnet (9) is arranged on the main shaft section between the upper bearing seat and the lower bearing seat, a rotor core (10) is arranged on the outer side of the permanent magnet (9), and a stator core (11) is fixed on the, a stator winding (12) is wound on the stator iron core (11), and the stator winding (12) is connected with a power supply control device; the permanent magnet (9), the rotor core (10), the stator core (11) and the stator winding (12) form a permanent magnet power compensation device of the motor.
2. The cooling tower water turbine with the permanent magnet power compensation device according to claim 1, wherein the power control device is capable of turning on a power supply to supply power to the stator winding when the water turbine needs power compensation, so that a main shaft of the water turbine obtains additional shaft power compensation, the main shaft rotates at a set rotating speed, when power compensation is not needed, a power supply line of the stator winding is disconnected, the stator winding does not work, meanwhile, a closed state of a coil of the stator winding is also cut off when the power supply line is disconnected, and a permanent magnet field cannot enable the stator winding to generate current, so that the power reduction of an output shaft of the main shaft is avoided.
3. The cooling tower water turbine with the permanent magnet power compensation device according to claim 1, wherein a bearing seat shell composed of the upper bearing seat and the lower bearing seat is provided with a cooling liquid channel (15), an inlet (13) of the cooling liquid channel (15) is communicated with the water outlet of the cooling tower, and the water absorbing heat through the cooling liquid channel (15) is discharged out of the bearing seat shell through a cooling liquid outlet (14).
4. The cooling tower water turbine with the permanent magnet power compensation device as claimed in claim 1, wherein the compensation power W 2 (kW) of the permanent magnet power compensation device is as follows:
W2=(W1/η1-9.81×Q×H)/η2
In the formula, W 1 is the power of a fan shaft, Q is the flow rate of a water turbine, the unit is m 3/s, H is the surplus pressure of the system, the unit is m, eta 1 is the efficiency of the water turbine, and eta 2 is the transmission efficiency of the compensating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920570949.3U CN209761615U (en) | 2019-04-24 | 2019-04-24 | Cooling tower water turbine with permanent magnet power compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920570949.3U CN209761615U (en) | 2019-04-24 | 2019-04-24 | Cooling tower water turbine with permanent magnet power compensation device |
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| Publication Number | Publication Date |
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| CN209761615U true CN209761615U (en) | 2019-12-10 |
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| CN201920570949.3U Active CN209761615U (en) | 2019-04-24 | 2019-04-24 | Cooling tower water turbine with permanent magnet power compensation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931203A (en) * | 2019-04-24 | 2019-06-25 | 南京峡谷能源科技有限公司 | A kind of hydraulic turbine of cooling tower of the permanent magnet powered compensation device of band |
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2019
- 2019-04-24 CN CN201920570949.3U patent/CN209761615U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931203A (en) * | 2019-04-24 | 2019-06-25 | 南京峡谷能源科技有限公司 | A kind of hydraulic turbine of cooling tower of the permanent magnet powered compensation device of band |
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