CN209990658U - Multi-driving structure of primary fan of thermal power plant - Google Patents
Multi-driving structure of primary fan of thermal power plant Download PDFInfo
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- CN209990658U CN209990658U CN201920950165.3U CN201920950165U CN209990658U CN 209990658 U CN209990658 U CN 209990658U CN 201920950165 U CN201920950165 U CN 201920950165U CN 209990658 U CN209990658 U CN 209990658U
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Abstract
A multi-drive structure of a primary fan of a thermal power plant belongs to the field of industrial steam supply and energy conservation of the thermal power plant. The utility model relates to a solve turboset exhaust cold steams and carry out desuperheating, decompression in order to satisfy hot user's needs parameter, and then produce great throttle loss, cause the extravagant problem of high-quality energy. The utility model discloses a backpressure machine, the multiaxis speed change clutch, a motor, a draught fan, the backpressure machine output, multiaxis speed change clutch input A, multiaxis speed change clutch input B, multiaxis speed change clutch output, a draught fan input, motor output and three shaft coupling, the backpressure machine output passes through a coupling joint with multiaxis speed change clutch input A, motor output passes through a coupling joint with multiaxis speed change clutch input B, multiaxis speed change clutch output passes through a coupling joint with a draught fan input. The utility model discloses mainly used thermal power plant's energy-conservation.
Description
Technical Field
The utility model relates to a many drive structure of thermal power plant primary air fan. Belongs to the field of industrial steam supply and energy conservation of thermal power plants.
Background
The main steam turbine generator set used in the thermal power plant, in addition to supplying electric energy, also utilizes the steam extraction or steam exhaust of the steam turbine to meet the heat requirement in production and life.
The thermal power plant adopts cold and hot two-way steam to supply steam to the outside, and the temperature and the pressure of the cold and hot steam under rated working conditions are higher, have larger difference with industrial steam parameters, and usually need to be adjusted to the parameters needed by a hot user through a temperature and pressure reducing station. Because the steam extraction opening parameter is not matched with the industrial steam parameter, when the steam is subjected to temperature reduction and pressure reduction, large throttling loss is generated, and high-quality energy is wasted.
The primary fan unit driving mode of the in-service unit of the thermal power plant is that a motor drives a primary fan. The shafting structure of the electrically-driven primary air fan comprises a motor and the primary air fan, and the shafting structure cannot solve the problem of throttling loss generated in a steam supply link in arrangement; and the commissioning of the load device is also affected when there is a problem with the motor.
In order to solve the problems and improve the energy waste generated in the steam supply link of the thermal power plant, a new technical scheme is specially provided. The method can be used for newly built projects or the reconstruction of some in-service projects.
Disclosure of Invention
The utility model relates to a solve turboset exhaust cold steams and carry out desuperheating, decompression in order to satisfy hot user's needs parameter, and then produce great throttle loss, cause the extravagant problem of high-quality energy. A multi-drive structure of a primary fan of a thermal power plant is provided.
The utility model adopts the technical proposal that:
the multi-drive structure of the primary fan of the thermal power plant comprises a back-pressing machine 1, a multi-shaft speed change clutch 2, a motor 3, a primary fan 4, a back-pressing machine output end 5, a multi-shaft speed change clutch input end A7, a multi-shaft speed change clutch input end B9, a multi-shaft speed change clutch output end 8, a primary fan input end 12, a motor output end 13 and three couplers 6, wherein the back-pressing machine 1 is provided with the back-pressing machine output end 5, the multi-shaft speed change clutch 2 is provided with the multi-shaft speed change clutch input end A7, the multi-shaft speed change clutch input end B9 and the multi-shaft speed change clutch output end 8, the primary fan 4 is provided with the primary fan input end 12, the motor 3 is provided with the motor output end 13, the back-pressing machine output end 5 is connected with the multi-shaft speed change clutch input end A7, the output end 8 of the multi-shaft speed change clutch is connected with the input end 12 of the primary air fan through a coupler 6.
Further, the multi-shaft speed change clutch 2 comprises an automatic synchronous clutch 2-1, a first gear 2-2, a second gear 2-3 and a third gear 2-4, the input end of the automatic synchronous clutch 2-1 is connected with the output end 5 of the back pressure machine through a coupler 6, the output end of the automatic synchronous clutch 2-1 is connected with the second gear 2-3, the first gear 2-2 is connected with the input end 12 of the primary air fan through the coupler 6, the third gear 2-4 is connected with the output end 13 of the motor through the coupler 6, the first gear 2-2 is meshed with the second gear 2-3, and the second gear 2-3 is meshed with the third gear 2-4.
Further, the coupler 6 is a diaphragm coupler or a diaphragm-disc coupler.
The multi-drive structure of the primary fan of the thermal power plant comprises a back press machine 1, a multi-shaft speed change clutch 2, a motor 3, a primary fan 4, a back press machine output end 5, a multi-shaft speed change clutch input end A7, a multi-shaft speed change clutch output end 8, a primary fan input end 12, a motor output end 13, a motor input end 14 and three couplers 6, wherein the back press machine 1 is provided with the back press machine output end 5, the multi-shaft speed change clutch 2 is provided with the multi-shaft speed change clutch input end A7 and the multi-shaft speed change clutch output end 8, the primary fan 4 is provided with the primary fan input end 12, the motor 3 is provided with the motor output end 13 and the motor input end 14, the back press machine output end 5 is connected with the multi-shaft speed change clutch input end A7 through one coupler 6, the multi, the motor output 13 is connected to the primary fan input 12 via a coupling 6.
Further, the multi-shaft speed change clutch 2 comprises an automatic synchronous clutch 2-1, a fourth gear 2-5 and a fifth gear 2-6, an output end 5 of the back pressure machine is connected with the fourth gear 2-5 through a coupler 6, an output end of the automatic synchronous clutch 2-1 is connected with an input end 14 of the motor through the coupler 6, an input end of the automatic synchronous clutch 2-1 is connected with the fifth gear 2-6, and the fourth gear 2-5 is meshed with the fifth gear 2-6.
Further, the coupler 6 is a diaphragm coupler or a diaphragm-disc coupler.
Compared with the prior art, the utility model the beneficial effect who produces is:
the back pressure machine replaces a temperature and pressure reducing device, cold re-steam discharged by the steam turbine set is used for the back pressure machine to do work through expansion, the back pressure machine is used as another driving mode of a primary fan, the discharged steam of the back pressure machine is used for supplying heat for users, throttling loss is reduced, the utilization rate of high-quality energy is improved, the utilization rate is improved by 30%, the purpose of saving energy and reducing consumption is achieved to the greatest extent; meanwhile, when any one of the back press machine or the motor has a problem, one power-driven auxiliary equipment can still be ensured, the flexibility of multiple driving modes of the unit is realized, the problem of the operation stability of the independently-driven auxiliary equipment is indirectly solved, and the operation flexibility of the system is increased.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1, in the present embodiment, the multi-driving structure of the primary fan of the thermal power plant includes a back-pressing machine 1, a multi-shaft speed change clutch 2, a motor 3, a primary fan 4, a back-pressing machine output end 5, a multi-shaft speed change clutch input end a7, a multi-shaft speed change clutch input end B9, a multi-shaft speed change clutch output end 8, a primary fan input end 12, a motor output end 13, and three couplings 6, the back-pressing machine 1 is provided with the back-pressing machine output end 5, the multi-shaft speed change clutch 2 is provided with a multi-shaft speed change clutch input end a7, a multi-shaft speed change clutch input end B9, and a multi-shaft speed change clutch output end 8, the primary fan 4 is provided with the primary fan input end 12, the motor 3 is provided with a motor output end 13, the motor output 13 is connected with the multi-shaft speed change clutch input B9 through a coupling 6, and the multi-shaft speed change clutch output 8 is connected with the primary air fan input 12 through a coupling 6.
The motor power that the adjustable primary air fan of movable vane that domestic steam power plant 33MW unit was equipped with designed the adapted is 1800kW, and under 60% load, two primary air fan operating power is about 1200 kW. Under 60% load of the unit, when the cold secondary steam supply flow is at 55-65t/h on average, the backpressure machine is used for replacing a temperature reduction pressure reducer, throttling loss generated by the temperature reduction pressure reducer is converted into expansion work of the backpressure machine, the recoverable power of the backpressure machine is about more than 1000kW and accounts for 85-90% of the total power consumption of a primary fan, under 60% rated load, the steam exhaust pressure of the backpressure machine can meet the requirement of a user, and when the exhaust temperature is higher, the temperature can be reduced by spraying water, and steam is supplied to the outside after the requirement of the user is met.
The back pressure machine replaces a temperature and pressure reducing device, cold re-steam discharged by the steam turbine set is used for the back pressure machine to do work through expansion, the back pressure machine is used as another driving mode of the primary fan, the discharged steam of the back pressure machine is used for supplying heat for users, throttling loss is reduced, the utilization rate of high-quality energy is improved, the purpose of saving energy and reducing consumption is achieved to the greatest extent; meanwhile, when any one of the back press machine or the motor has a problem, one power-driven auxiliary equipment can still be ensured, the flexibility of multiple driving modes of the unit is realized, the problem of the operation stability of the independently-driven auxiliary equipment is indirectly solved, and the operation flexibility of the system is increased. The motor accelerates the rotating speed to the working rotating speed for driving the primary fan through the multi-shaft variable speed clutch, the main steam turbine extracts steam after the standby set reaches a certain load, cold steam exhausted by the steam turbine set is used for the expansion work of the back pressure machine, the back pressure machine reaches the required rotating speed of the fan after being decelerated by the multi-shaft variable speed clutch, the output shaft power is transmitted to the primary fan and drives the primary fan together with the motor, the comprehensive energy utilization is realized to the maximum extent, the purpose of energy conservation and consumption reduction is achieved.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1, in the present embodiment, the multi-shaft transmission clutch 2 includes an automatic synchronous clutch 2-1, a first gear 2-2, a second gear 2-3, and a third gear 2-4, an input end of the automatic synchronous clutch 2-1 is connected to an output end 5 of the back pressure machine through a coupling 6, an output end of the automatic synchronous clutch 2-1 is connected to the second gear 2-3, the first gear 2-2 is connected to an input end 12 of the primary air fan through the coupling 6, the third gear 2-4 is connected to an output end 13 of the electric motor through the coupling 6, the first gear 2-2 is engaged with the second gear 2-3, and the second gear 2-3 is engaged with the third gear 2-4.
The multi-shaft transmission clutch 2 has an output and two inputs and can be connected to two drive units, one load. Under certain condition, certain occupied space can be saved compared with the coaxial arrangement, and the speed ratio requirement among all equipment can be met due to the integration of a plurality of gears and an automatic synchronous clutch; meanwhile, the automatic clutch has the automatic engaging and disengaging functions of the automatic synchronous clutch, the problem of operation stability of the auxiliary equipment driven independently can be solved, the auxiliary equipment can be still driven by power when the backpressure machine or the motor has problems, and the operation flexibility of the system is improved.
The movable vane adjustable primary fan is firstly driven by the motor, when the motor is adopted to drive the primary fan, according to the characteristic of the automatic synchronous clutch, when the rotating speed of the input end of the automatic synchronous clutch is less than the rotating speed of the output end, the automatic synchronous clutch is disengaged, the rotor of the back pressure machine is kept static, the motor drives the primary fan independently, and the primary fan can wait for operation when the back pressure machine breaks down and is overhauled at any time or the main turbine has insufficient steam extraction; when the main steam turbine unit reaches a certain load and steam can be normally supplied to the backpressure machine by steam extraction of the main steam turbine, the backpressure machine performs impulse rotation, when the rotating speed of the output end of the backpressure machine, namely the rotating speed of the input end of the automatic synchronous clutch, is greater than or equal to the rotating speed of the output end of the automatic synchronous clutch, the automatic synchronous clutch is engaged, a primary fan is driven by the backpressure machine and a motor in a double-driving mode, the backpressure machine and the motor share the shaft power of the fan, and the backpressure machine exhausts steam for users; or the motor switch is switched off, the unit reaches a certain load, and when the main steam turbine can normally supply steam to the back pressure machine, the back pressure machine carries out impulse rotation to independently drive the primary fan, which is a steam drive primary fan mode.
Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: in this embodiment, the coupling 6 is a diaphragm coupling or a diaphragm coupling.
The devices of the shafting are flexibly connected through the diaphragm coupling or the membrane disc coupling, so that the thermal state expansion amount of the rotor in the operation process of the devices can be absorbed, and the shafting can be operated in a thermal state to ensure the optimal working state.
Other components and connection modes are the same as those of the second embodiment.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 2, in the present embodiment, the multi-driving structure of the primary fan of the thermal power plant includes a back-press machine 1, a multi-shaft speed change clutch 2, a motor 3, a primary fan 4, a back-press machine output end 5, a multi-shaft speed change clutch input end a7, a multi-shaft speed change clutch output end 8, a primary fan input end 12, a motor output end 13, a motor input end 14, and three couplings 6, the back-press machine 1 is provided with the back-press machine output end 5, the multi-shaft speed change clutch 2 is provided with the multi-shaft speed change clutch input end a7 and the multi-shaft speed change clutch output end 8, the primary fan 4 is provided with the primary fan input end 12, the motor 3 is provided with the motor output end 13 and the motor input end 14, the back-press machine output end 5 and the multi-shaft speed change clutch input end a7, the motor output 13 is connected to the primary fan input 12 via a coupling 6.
The fourth embodiment is similar to the first embodiment in the unit operation principle, and the implementation scheme is specifically selected according to the space size of the unit site.
The motor power that the adjustable primary air fan of movable vane that domestic steam power plant 33MW unit was equipped with designed the adapted is 1800kW, and under 60% load, two primary air fan operating power is about 1200 kW. Under 60% load of the unit, when the cold secondary steam supply flow is at 55-65t/h on average, the backpressure machine is used for replacing a temperature reduction pressure reducer, throttling loss generated by the temperature reduction pressure reducer is converted into expansion work of the backpressure machine, the recoverable power of the backpressure machine is about more than 1000kW and accounts for 85-90% of the total power consumption of a primary fan, under 60% rated load, the steam exhaust pressure of the backpressure machine can meet the requirement of a user, and when the exhaust temperature is higher, the temperature can be reduced by spraying water, and steam is supplied to the outside after the requirement of the user is met.
The back pressure machine replaces a temperature and pressure reducing device, cold re-steam discharged by the steam turbine set is used for the back pressure machine to do work through expansion, the back pressure machine is used as another driving mode of the primary fan, the discharged steam of the back pressure machine is used for supplying heat for users, throttling loss is reduced, the utilization rate of high-quality energy is improved, the purpose of saving energy and reducing consumption is achieved to the greatest extent; meanwhile, when any one of the back press machine or the motor has a problem, one power-driven auxiliary equipment can still be ensured, the flexibility of multiple driving modes of the unit is realized, the problem of the operation stability of the independently-driven auxiliary equipment is indirectly solved, and the operation flexibility of the system is increased. The motor accelerates the rotating speed to the working rotating speed for driving the primary fan through the multi-shaft variable speed clutch, the main steam turbine extracts steam after the standby set reaches a certain load, cold steam exhausted by the steam turbine set is used for the expansion work of the back pressure machine, the back pressure machine reaches the required rotating speed of the fan after being decelerated by the multi-shaft variable speed clutch, the output shaft power is transmitted to the primary fan and drives the primary fan together with the motor, the comprehensive energy utilization is realized to the maximum extent, the purpose of energy conservation and consumption reduction is achieved.
The fifth concrete implementation mode: referring to fig. 2, the present embodiment will be described, in which the multi-shaft transmission clutch 2 includes an automatic synchronous clutch 2-1, a fourth gear 2-5 and a fifth gear 2-6, the output end 5 of the back pressure machine is connected to the fourth gear 2-5 through a coupling 6, the output end of the automatic synchronous clutch 2-1 is connected to the input end 14 of the motor through the coupling 6, the input end of the automatic synchronous clutch 2-1 is connected to the fifth gear 2-6, and the fourth gear 2-5 is engaged with the fifth gear 2-6.
The multi-shaft transmission clutch 2 has an output and an input, and two drive devices are connected to the clutch. Under certain condition, certain occupied space can be saved compared with the coaxial arrangement, and the speed ratio requirement among all equipment can be met due to the integration of a plurality of gears and an automatic synchronous clutch; meanwhile, the automatic clutch has the automatic engaging and disengaging functions of the automatic synchronous clutch, the problem of operation stability of the auxiliary equipment driven independently can be solved, the auxiliary equipment can be still driven by power when the backpressure machine or the motor has problems, and the operation flexibility of the system is improved.
The movable vane adjustable primary fan is firstly driven by the motor, when the motor is adopted to drive the primary fan, according to the characteristic of the automatic synchronous clutch, when the rotating speed of the input end of the automatic synchronous clutch is less than the rotating speed of the output end, the automatic synchronous clutch is disengaged, the rotor of the back pressure machine is kept static, the motor drives the primary fan independently, and the primary fan can wait for operation when the back pressure machine breaks down and is overhauled at any time or the main turbine has insufficient steam extraction; when the main steam turbine unit reaches a certain load and steam can be normally supplied to the backpressure machine by steam extraction of the main steam turbine, the backpressure machine performs impulse rotation, when the rotating speed of the output end of the backpressure machine, namely the rotating speed of the input end of the automatic synchronous clutch, is greater than or equal to the rotating speed of the output end of the automatic synchronous clutch, the automatic synchronous clutch is engaged, a primary fan is driven by the backpressure machine and a motor in a double-driving mode, the backpressure machine and the motor share the shaft power of the fan, and the backpressure machine exhausts steam for users; or the motor switch is switched off, the unit reaches a certain load, and when the main steam turbine can normally supply steam to the back pressure machine, the back pressure machine carries out impulse rotation to independently drive the primary fan, which is a steam drive primary fan mode.
The other components and the connection mode are the same as those of the fourth embodiment.
The sixth specific implementation mode: in this embodiment, the coupling 6 is a diaphragm coupling or a diaphragm coupling.
The devices of the shafting are flexibly connected through the diaphragm coupling or the membrane disc coupling, so that the thermal state expansion amount of the rotor in the operation process of the devices can be absorbed, and the shafting can be operated in a thermal state to ensure the optimal working state.
The other components and the connection mode are the same as the fifth embodiment mode.
Claims (6)
1. Many drive structure of thermal power plant primary air fan, its characterized in that: the back-pressing machine comprises a back-pressing machine (1), a multi-shaft speed change clutch (2), a motor (3), a primary air fan (4), a back-pressing machine output end (5), a multi-shaft speed change clutch input end A (7), a multi-shaft speed change clutch input end B (9), a multi-shaft speed change clutch output end (8), a primary air fan input end (12), a motor output end (13) and three couplings (6), wherein the back-pressing machine (1) is provided with the back-pressing machine output end (5), the multi-shaft speed change clutch (2) is provided with the multi-shaft speed change clutch input end A (7), the multi-shaft speed change clutch input end B (9) and the multi-shaft speed change clutch output end (8), the primary air fan (4) is provided with the primary air fan input end (12), the motor (3) is provided with the motor output end (13), the back-pressing machine output end, the output end (13) of the motor is connected with the input end B (9) of the multi-shaft variable speed clutch through a coupler (6), and the output end (8) of the multi-shaft variable speed clutch is connected with the input end (12) of the primary air fan through a coupler (6).
2. The multiple drive configuration for primary blowers in a thermal power plant of claim 1, further comprising: the multi-shaft speed change clutch (2) comprises an automatic synchronous clutch (2-1) and a first gear (2-2), the automatic clutch comprises a second gear (2-3) and a third gear (2-4), wherein the input end of an automatic synchronous clutch (2-1) is connected with the output end (5) of a back pressure machine through a coupler (6), the output end of the automatic synchronous clutch (2-1) is connected with the second gear (2-3), the first gear (2-2) is connected with the input end (12) of a primary air fan through the coupler (6), the third gear (2-4) is connected with the output end (13) of a motor through the coupler (6), the first gear (2-2) is meshed with the second gear (2-3), and the second gear (2-3) is meshed with the third gear (2-4).
3. The multiple drive configuration for primary blowers in a thermal power plant of claim 2, further comprising: the coupler (6) is a diaphragm coupler or a diaphragm disc coupler.
4. Many drive structure of thermal power plant primary air fan, its characterized in that: the back-pressing machine comprises a back-pressing machine (1), a multi-shaft speed change clutch (2), an electric motor (3), a primary air fan (4), a back-pressing machine output end (5), a multi-shaft speed change clutch input end A (7), a multi-shaft speed change clutch output end (8), a primary air fan input end (12), an electric motor output end (13), an electric motor input end (14) and three shaft couplings (6), wherein the back-pressing machine (1) is provided with the back-pressing machine output end (5), the multi-shaft speed change clutch (2) is provided with the multi-shaft speed change clutch input end A (7) and the multi-shaft speed change clutch output end (8), the primary air fan (4) is provided with the primary air fan input end (12), the electric motor (3) is provided with the electric motor output end (13) and the electric motor input end (14), the back-pressing, the output end (8) of the multi-shaft speed change clutch is connected with the input end (14) of the motor through a coupler (6), and the output end (13) of the motor is connected with the input end (12) of the primary air fan through a coupler (6).
5. The multiple drive configuration for primary blowers in a thermal power plant of claim 4, further comprising: the multi-shaft speed change clutch (2) comprises an automatic synchronous clutch (2-1), a fourth gear (2-5) and a fifth gear (2-6), an output end (5) of the back pressure machine is connected with the fourth gear (2-5) through a coupler (6), an output end of the automatic synchronous clutch (2-1) is connected with an input end (14) of a motor through the coupler (6), an input end of the automatic synchronous clutch (2-1) is connected with the fifth gear (2-6), and the fourth gear (2-5) is meshed with the fifth gear (2-6).
6. The multiple drive configuration for primary blowers in a thermal power plant of claim 5, further comprising: the coupler (6) is a diaphragm coupler or a diaphragm disc coupler.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110145475A (en) * | 2019-06-21 | 2019-08-20 | 哈尔滨广瀚动力传动有限公司 | More driving structures of Thermal Power Station's primary air fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145475A (en) * | 2019-06-21 | 2019-08-20 | 哈尔滨广瀚动力传动有限公司 | More driving structures of Thermal Power Station's primary air fan |
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