CN217735679U - Hybrid speed-regulating transmission system and water supply equipment - Google Patents
Hybrid speed-regulating transmission system and water supply equipment Download PDFInfo
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- CN217735679U CN217735679U CN202221729421.4U CN202221729421U CN217735679U CN 217735679 U CN217735679 U CN 217735679U CN 202221729421 U CN202221729421 U CN 202221729421U CN 217735679 U CN217735679 U CN 217735679U
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Abstract
The utility model discloses a mix speed governing transmission system and water supply installation, wherein, the system includes: the first water supply device comprises a first water supply pump and a hydraulic coupler, wherein the hydraulic coupler is connected with the first water supply pump and adjusts the rotating speed of the first water supply pump by configuring the opening degree of the scoop tube; the second water supply device is connected with the first water supply device in parallel and comprises a second water supply pump and a variable frequency motor, the variable frequency motor is connected with the second water supply pump, and the rotating speed of the second water supply pump is adjusted by configuring the operating frequency; and the control device is respectively connected with the hydraulic coupler and the variable frequency motor, is configured to determine the scoop tube opening instruction and the variable frequency instruction according to the target rotating speed, and controls the scoop tube opening of the hydraulic coupler according to the scoop tube opening instruction and the operating frequency of the variable frequency motor according to the variable frequency instruction so as to keep the rotating speed of the first water feed pump and the rotating speed of the second water feed pump synchronously regulated. Therefore, the control consistency of opening speed regulation and variable frequency speed regulation of the scoop tube is ensured, and the generator set can run reliably.
Description
Technical Field
The utility model relates to a drive technical field of boiler feed pump of thermal power factory especially relates to a hybrid speed governing transmission system and a water supply equipment.
Background
Currently, most mainstream configurations of power plant feed pumps are two types: the dual-purpose one-standby configuration is adopted, each feed pump is configured according to 50% of the boiler capacity, and the liquid coupling speed regulation mode is adopted; or one-use one-standby configuration, each feed pump is configured according to 100 percent of boiler capacity, and the liquid coupling speed regulation mode is adopted. The water supply pump transformation scheme is to generally transform two water supply pumps and keep one power frequency liquid couple control, so that the water supply pump can frequently run in the conditions of one variable frequency dragging operation and the other power frequency liquid couple speed regulation operation in normal operation.
However, the response speed, linearity and speed regulation accuracy of variable frequency speed regulation and liquid couple speed regulation are different, which causes great interference to automatic water supply control, for example, great fluctuation of a drum water level line, failure of water supply control of a drum boiler, incapability of performing Automatic Generation Control (AGC) on a unit, and even possibly causing drum water level alarm in severe cases, thereby bringing great hidden danger to normal operation of a power plant and unit safety.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving one of the technical problems in the related art at least to a certain extent. Therefore, an object of the utility model is to provide a hybrid speed governing transmission system, can confirm scoop tube aperture instruction and frequency conversion instruction according to the target rotational speed, and according to scoop tube aperture instruction control fluid coupling's scoop tube aperture, and according to the operating frequency of frequency conversion instruction control inverter motor, so that the rotational speed of first feed pump and the rotational speed of second feed pump keep synchronous regulation. Therefore, the control consistency of opening speed regulation and variable frequency speed regulation of the scoop tube is ensured, and the generator set can run reliably.
Another object of the utility model is to provide a water supply installation.
To achieve the above object, the present invention provides a hybrid speed-regulating transmission system, including: the system comprises a first water supply device, a second water supply device and a control device, wherein the first water supply device comprises a first water supply pump and a hydraulic coupler, the hydraulic coupler is connected with the first water supply pump, and the rotation speed of the first water supply pump is adjusted by configuring the opening degree of a scoop tube; the second water supply device is connected with the first water supply device in parallel and comprises a second water supply pump and a variable frequency motor, the variable frequency motor is connected with the second water supply pump, and the rotating speed of the second water supply pump is adjusted by configuring the operating frequency; the control device is respectively connected with the hydraulic coupler and the variable frequency motor, the control device is configured to determine a scoop tube opening instruction and a variable frequency instruction according to a target rotating speed, and control the scoop tube opening of the hydraulic coupler according to the scoop tube opening instruction, and the control device is configured to control the operating frequency of the variable frequency motor according to the variable frequency instruction, so that the rotating speed of the first water supply pump and the rotating speed of the second water supply pump are synchronously adjusted.
According to the utility model provides a hybrid speed governing transmission system links to each other controlling means with fluid coupling ware and inverter motor respectively to and through configuring controlling means for according to target rotational speed definite scoop tube aperture instruction and frequency conversion instruction, and according to scoop tube aperture instruction control fluid coupling ware's scoop tube aperture, and according to frequency conversion instruction control inverter motor's operating frequency, so that the rotational speed of first water-feeding pump and the rotational speed of second water-feeding pump keep synchronous control. Therefore, speed regulation control deviation among different water feeding pumps is avoided, and transmission precision and operation reliability are improved.
In addition, according to the utility model discloses foretell hybrid speed governing transmission system can also have following additional technical characterstic:
in some examples, the first water supply device further comprises a first electric motor, the first electric motor is connected with the fluid coupling, and the first electric motor drives the first water supply pump to operate through the fluid coupling.
In some examples, the hydraulic coupler comprises a pump impeller, a turbine, a scoop tube and a first speed-increasing gear, wherein an input end of the first speed-increasing gear is connected with an output shaft of the first motor, an output end of the first speed-increasing gear is connected with the pump impeller, the turbine is connected with one end of the output shaft of the hydraulic coupler, the other end of the output shaft of the hydraulic coupler is connected with the first water-feeding pump, an inner cavity of the pump impeller and an inner cavity of the turbine jointly form a working cavity of the hydraulic coupler, and the scoop tube is configured to adjust the rotating speed of the first water-feeding pump by adjusting the oil amount in the working cavity.
In some examples, the inverter motor includes an inverter and a second motor, the second motor is configured to drive the second feed water pump to operate, the inverter is respectively connected with the control device and the second motor, and the inverter is configured to adjust the operating speed of the second motor according to the inverter instruction so as to adjust the speed of the second feed water pump through the second motor.
In some examples, an accelerating gear box is arranged between the second motor and the second water-feeding pump, the accelerating gear box comprises a second accelerating gear and a coupler, the input end of the second accelerating gear is connected with the output shaft of the second motor, and the output end of the second accelerating gear is connected to the second water-feeding pump through the coupler.
In some examples, the first water supply further comprises a first pre-pump, the second water supply further comprises a second pre-pump, the first pre-pump is driven by a first motor in the first water supply, the second pre-pump is driven by a second motor in the second water supply, the first water supply pump is connected with the first pre-pump, and the second water supply pump is connected with the second pre-pump.
In some examples, the second water supply device is a plurality of water supply devices, and the plurality of water supply devices are connected in parallel.
In some examples, the control apparatus includes a first drum level detector configured to detect a drum level of a boiler, and a first controller configured to determine the target rotational speed according to the drum level.
In some examples, the control apparatus includes a second drum water level detector, a second controller, a steam flow detector, a feedwater flow detector, a subtractor, and a given regulator, the subtractor is connected to the steam flow detector and the feedwater flow detector, respectively, and is configured to determine a flow difference from the steam flow detected by the steam flow detector and the feedwater flow detected by the feedwater flow detector, the second controller is connected to the second drum water level detector, and is configured to determine a target flow from the drum water level detected by the second drum water level detector, and the given regulator is connected to the second controller and the subtractor, respectively, and is configured to determine the target rotation speed from the target flow and the flow difference.
In order to achieve the above object, the present invention provides a water supply device, which comprises the hybrid speed-adjusting transmission system according to the first aspect of the present invention.
According to the utility model provides a water supply equipment through adopting aforementioned mixed speed governing transmission system, can confirm spoon pipe aperture instruction and frequency conversion instruction according to target rotational speed to according to spoon pipe aperture instruction control fluid coupling's spoon pipe aperture, and according to frequency conversion instruction control inverter motor's operating frequency, so that the rotational speed of first water-feeding pump and the rotational speed of second water-feeding pump keep synchronous control. Therefore, the control consistency of opening speed regulation and variable frequency speed regulation of the scoop tube is ensured, and the generator set can run reliably.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block schematic diagram of a hybrid variable speed drive system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first water supply apparatus according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion A of the fluid coupling of FIG. 2;
FIG. 4 is a schematic diagram of a second water supply according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a hybrid variable speed drive system according to an embodiment of the present invention;
FIG. 6 is a schematic illustration of a hybrid variable speed drive system according to another embodiment of the present invention;
fig. 7 is a block schematic diagram of a water supply apparatus according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The hybrid timing drive system and the water supply apparatus according to the embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a block schematic diagram of a hybrid variable speed drive system according to an embodiment of the present invention.
As shown in fig. 1, the hybrid variable speed drive system 100 includes: a first water supply device 10, a second water supply device 20 and a control device 30.
As shown in fig. 2 to 4, the first water supply device 10 includes a first water supply pump 11 and a fluid coupling 12, wherein the fluid coupling 12 is connected to the first water supply pump 11 and adjusts the rotation speed of the first water supply pump 11 by configuring the opening degree of a scoop tube; the second water supply device 20 is connected with the first water supply device 10 in parallel, the second water supply device 20 comprises a second water supply pump 21 and a variable frequency motor 22, the variable frequency motor 22 is connected with the second water supply pump 21, and the rotating speed of the second water supply pump 21 is adjusted by configuring the operating frequency; the control device 30 is respectively connected with the hydraulic coupler 12 and the variable-frequency motor 22, and the control device 30 is configured to determine a scoop tube opening instruction and a variable-frequency instruction according to the target rotating speed, control the scoop tube opening of the hydraulic coupler 12 according to the scoop tube opening instruction, and control the operating frequency of the variable-frequency motor 22 according to the variable-frequency instruction, so that the rotating speed of the first water-feeding pump 11 and the rotating speed of the second water-feeding pump 21 are synchronously adjusted.
Specifically, the hydraulic coupler 12 connected to the first feed-water pump 11 may adjust the rotational speed of the first feed-water pump 11 by arranging the scoop tube opening degree to adjust the rotational speed of the first feed-water pump 11, that is, by arranging the scoop tube opening degree in the hydraulic coupler 12, for example, the larger the scoop tube opening degree at which the hydraulic coupler 12 is arranged, the higher the output rotational speed of the hydraulic coupler 12, thereby increasing the rotational speed of the first feed-water pump 11, and the smaller the scoop tube opening degree at which the hydraulic coupler 12 is arranged, the lower the output rotational speed of the hydraulic coupler 12, thereby decreasing the rotational speed of the first feed-water pump 11.
The inverter motor 22 connected to the second feed-water pump 21 can adjust the rotation speed of the second feed-water pump 21 by configuring the operation frequency, that is, the rotation speed of the second feed-water pump 21 by configuring the operation frequency in the inverter motor 22, for example, the higher the operation frequency configured by the inverter motor 22, the higher the output rotation speed of the inverter motor 22, so as to increase the rotation speed of the second feed-water pump 21, and the lower the operation frequency configured by the inverter motor 22, the lower the output rotation speed of the inverter motor 22, so as to decrease the rotation speed of the second feed-water pump 21.
Because the speed regulation regulating range of the opening of the configured scoop tube is 30-80%, namely when the opening of the scoop tube is 0-30%, the output rotating speed of the hydraulic coupler 12 is not obviously changed, and when the opening of the scoop tube is more than 80%, the opening of the scoop tube is in a full-open state, the speed regulation precision by configuring the opening of the scoop tube is low, the speed regulation response is slow, the speed regulation sensitivity is low, especially when the load is heavy load and light load, the rotating speed of the water feeding pump may be different under the same opening of the scoop tube, but the speed regulation response by configuring the operation frequency is not only adjustable, but also has high linearity and high speed regulation sensitivity, when the hybrid speed regulation transmission system 100 simultaneously operates the first water feeding device 10 and the second water feeding device 20, the automatic control of the water feeding is greatly interfered under the condition that the speed regulation precision, the speed regulation response and the speed regulation sensitivity are different, cause the huge fluctuation of steam pocket waterline, bring huge hidden danger for power plant's normal operating and unit safety, consequently, in the example of the utility model, still link to each other with fluid coupling 12 and inverter motor 22 respectively through setting up controlling means 30, and be configured into scoop tube aperture instruction and frequency conversion instruction according to the target rotational speed with controlling means 30, and according to scoop tube aperture instruction control fluid coupling 12's scoop tube aperture, and be configured into the operating frequency according to frequency conversion instruction control inverter motor 22, so that the rotational speed of first water-feeding pump 11 and the rotational speed of second water-feeding pump 21 keep synchronous control, thereby, ensure scoop tube aperture speed regulation and frequency conversion speed's control uniformity, make the generating set reliably run.
It should be noted that the control device 30 can convert the scoop tube opening instruction and the frequency conversion instruction into a control instruction with a unified range according to the target rotating speed, so that the rotating speed of the first water-feeding pump 11 is consistent with the speed regulation response speed, the speed regulation precision and the speed regulation linearity of the second water-feeding pump 21, so that the rotating speed of the first water-feeding pump 11 is kept synchronously regulated with the rotating speed of the second water-feeding pump 21, wherein the control device 30 can determine the scoop tube opening instruction and the frequency conversion instruction according to the mapping relationship among the target rotating speed, the scoop tube opening instruction and the frequency conversion instruction.
It should be understood that, in the above example, the control device 30 may determine the scoop tube opening command and the frequency conversion command according to the target rotation speed, where the scoop tube opening command and the frequency conversion command are both individually controlled and adjustable commands, and respectively act on the scoop tube opening control and the operation frequency control, and the rotation speed of the first water-feeding pump 11 and the rotation speed of the second water-feeding pump 21 may be synchronously adjusted by adjusting the response speed and precision of the command configuring the scoop tube opening and the configuring operation frequency, so as to ensure the control consistency of the scoop tube opening speed regulation and the frequency conversion speed regulation, and thus, the generator set may reliably operate.
In some embodiments of the present invention, as shown in fig. 2, the first water supply device 10 further includes a first electric motor 13, the first electric motor 13 is connected to the fluid coupling 12, and the first electric motor 13 drives the first water supply pump 11 to operate through the fluid coupling 12.
That is, the first electric motor 13 may transmit the power of the first electric motor 13 to the first water feed pump 11 through the fluid coupling 12, thereby driving the first water feed pump 11 to operate, and driving the first water supply device 10 to supply water.
It should be understood that, in the above example, after the control device 30 determines the scoop tube opening degree command according to the target rotation speed and controls the scoop tube opening degree of the fluid coupling 12 according to the scoop tube opening degree command, the first electric motor 13 may transmit power corresponding to the scoop tube opening degree to the first water-feeding pump 11 through the fluid coupling 12 to drive the first water-feeding pump 11 to operate, thereby driving the first water-feeding device 10 to feed water.
In some embodiments of the present invention, as shown in fig. 2 and 3, the fluid coupling 12 includes a pump impeller 121, a turbine 122, a scoop tube 123, and a first speed-up gear 124.
The input end of the first speed-up gear 124 is connected with the output shaft of the first electric motor 13, the output end of the first speed-up gear 124 is connected with the pump impeller 121, the turbine 122 is connected with one end of the output shaft of the fluid coupler 12, the other end of the output shaft of the fluid coupler 12 is connected with the first water-feeding pump 11, the inner cavity of the pump impeller 121 and the inner cavity of the turbine 122 jointly form a working cavity of the fluid coupler 12, and the scoop tube 123 is configured to adjust the rotating speed of the first water-feeding pump 11 by adjusting the oil amount in the working cavity.
Specifically, when the first electric motor 13 rotates the pump wheel 121 through the first speed-increasing gear 124, the working oil in the inner cavity of the pump wheel 121 obtains energy and is sent to the outer circumferential side of the pump wheel 121 under the action of inertial centrifugal force to form a high-speed oil flow, the high-speed oil flow on the outer circumferential side of the pump wheel 121, at a radial relative speed, and at a peripheral speed of the outlet of the pump wheel 121, rushes into the radial flow channel inlet of the turbine 122, flows to the inner cavity of the turbine 122 along the radial flow channel of the turbine 122, further, the turbine 122 is rotated by the change of the oil flow torque, the oil flows to the outlet of the turbine 122, at a radial relative speed, and at a peripheral speed of the outlet of the turbine 122, flows into the radial flow channel of the pump wheel 121, and obtains energy again in the pump wheel 121. The foregoing process is repeated to form a circular flow circle of the working oil in the pump impeller 121 and the turbine runner 122, whereby the pump impeller 121 can convert the mechanical work input from the first electric motor 13 into the kinetic energy of the oil, and the turbine runner 122 can convert the kinetic energy of the oil into the mechanical work output, thereby transmitting the power of the first electric motor 13 to the first feed water pump 11 through the fluid coupling 12.
The scoop pipe 123 is configured to adjust the rotation speed of the first water-feeding pump 11 by adjusting the amount of oil in the working chamber, for example, when the scoop pipe 123 is inserted to the deepest part of the working chamber of the fluid coupling 12 (the scoop pipe opening is smallest), the amount of oil in the circulation circle is smallest, the deviation of the rotation speeds of the pump wheel 121 and the turbine wheel 122 is large, and at this time, the output rotation speed of the fluid coupling 12 is lowest, and when the scoop pipe 123 is inserted to the shallowest part of the working chamber of the fluid coupling 12 (the scoop pipe opening is largest), the amount of oil in the circulation circle is largest, the deviation of the rotation speeds of the pump wheel 121 and the turbine wheel 122 is small, and at this time, the output rotation speed of the fluid coupling 12 is largest.
It should be understood that, in the above example, after the control device 30 determines the scoop tube opening command according to the target rotation speed and controls the scoop tube opening of the fluid coupling 12 according to the scoop tube opening command, the scoop tube 123 in the fluid coupling 12 can adjust the rotation speed of the first feed water pump 11 by adjusting the oil amount in the working chamber (which is composed of the inner chamber of the pump impeller 121 and the inner chamber of the turbine 122 together), so that the rotation speed of the first feed water pump 11 and the rotation speed of the second feed water pump 21 are kept synchronously adjusted.
In some embodiments of the present invention, as shown in fig. 4, the inverter motor 22 includes an inverter 221 and a second motor 222.
Wherein, the second motor 222 is configured to drive the second water-feeding pump 21 to operate, the frequency converter 221 is respectively connected with the control device 30 and the second motor 222, and the frequency converter 221 is configured to adjust the operating speed of the second motor 222 according to the frequency conversion instruction, so as to adjust the speed of the second water-feeding pump 21 through the second motor 222.
Specifically, the control device 30 may determine a variable frequency command according to the target rotation speed, and may control the inverter 221 to adjust the operating rotation speed of the second motor 222 according to the variable frequency command, so as to adjust the rotation speed of the second feed water pump 21 by the second motor 222. That is, the second motor 222 may transmit power corresponding to the operation rotation speed to the second feed water pump 21 to adjust the rotation speed of the second feed water pump 21.
The inverter 221 may adjust the rotation speed of the second water-feeding pump 21 by adjusting the operation rotation speed of the second motor 222, for example, when the inverter 221 increases the operation rotation speed of the second motor 222 according to the inverter command, the power transmitted from the second motor 222 to the second water-feeding pump 21 is increased, thereby increasing the rotation speed of the second water-feeding pump 21, and when the inverter 221 decreases the operation rotation speed of the second motor 222 according to the inverter command, the power transmitted from the second motor 222 to the second water-feeding pump 21 is decreased, thereby decreasing the rotation speed of the second water-feeding pump 21.
It should be understood that, in the above example, after the control device 30 determines the variable frequency command according to the target rotation speed and controls the operation frequency of the variable frequency motor 22 according to the variable frequency command, the frequency converter 221 may adjust the operation rotation speed of the second motor 222 according to the variable frequency command to adjust the rotation speed of the second feed-water pump 21 through the second motor 222, so as to keep the rotation speed of the second feed-water pump 21 and the rotation speed of the first feed-water pump 11 adjusted synchronously.
In some embodiments of the present invention, as shown in fig. 4, an acceleration gear box 23 is disposed between the second motor 222 and the second water-feeding pump 21, the acceleration gear box 23 includes a second acceleration gear 231 and a coupling 232, an input end of the second acceleration gear 231 is connected to an output shaft of the second motor 222, and an output end of the second acceleration gear 231 is connected to the second water-feeding pump 21 through the coupling 232.
Specifically, when the second motor 222 rotates the second water-feed pump 21 via the second speed-up gear 231 and the coupling 232, the power of the second motor 222 may be transmitted to the second water-feed pump 21, thereby driving the second water-feed pump 21 to operate. Thus, the rotational speed of the second feed water pump 21 can be adjusted by changing the operating rotational speed of the second motor 222.
It should be understood that, in the above example, after the control device 30 determines the frequency conversion command according to the target rotation speed and controls the operation frequency of the frequency conversion motor 22 according to the frequency conversion command, the second motor 222 may operate at an operation rotation speed corresponding to the operation frequency, and further, the power corresponding to the operation rotation speed of the second motor 222 may drive the second feed water pump 21 to rotate through the second speed-up gear 231 and the coupling 232 to adjust the rotation speed of the second feed water pump 21, so that the rotation speed of the second feed water pump 21 and the rotation speed of the first feed water pump 11 are synchronously adjusted.
In some embodiments of the present invention, as shown in fig. 2-6, the first water supply 10 further includes a first pre-pump 14 and the second water supply 20 further includes a second pre-pump 24.
As shown in fig. 2 to 4, the first pre-pump 14 is driven by the first motor 13 in the first water supply apparatus 10, the second pre-pump 24 is driven by the second motor 222 in the second water supply apparatus 20, the first water supply pump 11 is connected to the first pre-pump 14, and the second water supply pump 21 is connected to the second pre-pump 24.
Specifically, the first motor 13 may drive the first pre-pump 14 to raise the water pressure at the water inlet of the first feed water pump 11 to prevent cavitation of the first feed water pump 11, and the second motor 222 may drive the second pre-pump 24 to raise the water pressure at the water inlet of the second feed water pump 21 to prevent cavitation of the first feed water pump 21.
It should be understood that, in the above example, the first water supply device 10 can prevent the first water supply pump 11 from cavitation by the first pre-pump 14, and the second water supply device 20 can prevent the first water supply pump 21 from cavitation by the second pre-pump 24, so as to improve the service life and reliability of the first water supply pump 11 and the first water supply pump 21, and enable the generator set to operate reliably.
In some embodiments of the present invention, as shown in fig. 5 and 6, the second water supply device 20 is plural, and the plural second water supply devices 20 are connected in parallel.
Optionally, a plurality of second water supply devices 20 connected in parallel may be included in the hybrid variable speed drive system 100, and each second water supply device 20 may be configured to supply water to the generator set.
It should be appreciated that in the above example, the hybrid overdrive system 100 may feed the genset with a plurality of second water feed devices 20 in parallel. Therefore, even when the generator set has a large water supply requirement, the water supply requirement of the generator set can be met in time, and the generator set can run reliably.
In some embodiments of the present invention, as shown in fig. 5, the control device 30 includes a first steam drum water level detector 301 and a first controller 302.
Wherein the first drum level detector 301 is configured to detect a drum level of the boiler, and the first controller 302 is configured to determine the target rotation speed based on the drum level.
Specifically, the first controller 302 may determine the target rotation speed according to the drum level of the boiler detected by the first drum level detector 301, for example, when the drum level of the boiler is higher than a preset water level threshold, the target rotation speed may be appropriately reduced, when the drum level of the boiler is lower than the preset water level threshold, the target rotation speed may be appropriately increased, and when the drum level of the boiler is lower than the preset water level threshold, the current target rotation speed may be maintained, thereby implementing the single impulse (drum level) water level control.
It should be understood that, in the above example, the control device 30 may detect the drum water level of the boiler through the first drum water level detector 301, and determine the target rotation speed according to the drum water level through the first controller 302, and then determine the scoop tube opening instruction and the variable frequency instruction according to the target rotation speed, and control the scoop tube opening of the fluid coupling 12 according to the scoop tube opening instruction and control the operating frequency of the variable frequency motor 22 according to the variable frequency instruction, so as to keep the rotation speed of the first water-feeding pump 11 and the rotation speed of the second water-feeding pump 21 synchronously regulated, thereby ensuring the control consistency of the scoop tube opening speed regulation and the variable frequency speed regulation, and enabling the generator set to reliably operate.
In some embodiments of the present invention, as shown in fig. 6, the control device 30 includes a second steam drum water level detector 303, a second controller 304, a steam flow detector 305, a feedwater flow detector 306, a subtractor 307, and a setting regulator 308.
Wherein the subtracter 307 is connected to the steam flow detector 305 and the feedwater flow detector 306, respectively, and is configured to determine a flow difference value according to the steam flow detected by the steam flow detector 305 and the feedwater flow detected by the feedwater flow detector 306, the second controller 304 is connected to the second drum water level detector 303 and is configured to determine a target flow according to the drum water level detected by the second drum water level detector 303, and the given regulator 308 is connected to the second controller 304 and the subtracter 307, respectively, and is configured to determine a target rotation speed according to the target flow and the flow difference value.
Specifically, the subtractor 307 may determine a flow difference value according to the steam flow detected by the steam flow detector 305 and the feedwater flow detected by the feedwater flow detector 306, the second controller 304 may determine a target flow according to the drum water level detected by the second drum water level detector 303, and the setting regulator 308 may determine a target rotation speed according to the target flow and the flow difference value, thereby implementing the three-impulse (drum water level, steam flow, and feedwater flow) water level control.
It should be understood that, in the above example, the control device 30 may detect the drum water level of the boiler through the second drum water level detector 303, detect the steam flow through the steam flow detector 305, detect the feed water flow through the feed water flow detector 306, further determine a flow difference value according to the steam flow and the feed water flow through the subtractor 307, determine a target flow according to the drum water level through the second controller 304, then determine a target rotation speed according to the target flow and the flow difference value through the setting regulator 308, further determine a scoop tube opening instruction and a variable frequency instruction according to the target rotation speed, control the scoop tube opening of the fluid coupling 12 according to the scoop tube opening instruction and control the operating frequency of the variable frequency motor 22 according to the variable frequency instruction, so as to keep the rotation speed of the first feed water pump 11 and the rotation speed of the second feed water pump 21 synchronously adjusted, thereby ensuring control consistency of scoop tube opening speed regulation and variable frequency speed regulation, and enabling the generator set to operate reliably.
To sum up, according to the utility model provides a hybrid speed governing transmission system links to each other controlling means with fluid coupling ware and inverter motor respectively to and through configuring controlling means to confirm scoop tube aperture instruction and frequency conversion instruction according to the target speed, and according to scoop tube aperture instruction control fluid coupling ware's scoop tube aperture, and configure controlling means to control inverter motor's operating frequency according to the frequency conversion instruction, so that the rotational speed of first water-feeding pump and the rotational speed of second water-feeding pump keep the synchronization regulation. Therefore, speed regulation control deviation among different water feeding pumps is avoided, and transmission precision and operation reliability are improved.
Fig. 7 is a block schematic diagram of a water supply apparatus according to an embodiment of the present invention.
As shown in FIG. 7, the water supply facility 1000 includes the hybrid overdrive system 100 as described above.
It should be noted that, because the utility model provides a water supply installation 1000 adopts the hybrid speed-regulating transmission system 100 as described above, therefore, the concrete implementation of water supply installation 1000 can refer to the concrete implementation of aforementioned hybrid speed-regulating transmission system 100, in addition, other constitutions and effects of the water supply installation 1000 of the embodiment of the present invention are known to those skilled in the art, and for reducing redundancy, no repeated description is made here.
To sum up, according to the utility model provides a water supply equipment through adopting aforementioned mixed speed governing transmission system, can confirm scoop tube aperture instruction and frequency conversion instruction according to target rotational speed to according to scoop tube aperture instruction control fluid coupling's scoop tube aperture, and according to frequency conversion instruction control inverter motor's operating frequency, so that the rotational speed of first water-feeding pump and the rotational speed of second water-feeding pump keep synchronous control. Therefore, the control consistency of opening speed regulation and variable frequency speed regulation of the scoop tube is ensured, and the generator set can run reliably.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A hybrid variable speed drive system, comprising:
the first water supply device comprises a first water supply pump and a hydraulic coupler, wherein the hydraulic coupler is connected with the first water supply pump, and the rotating speed of the first water supply pump is adjusted by configuring the opening degree of a scoop tube;
the second water supply device is connected with the first water supply device in parallel and comprises a second water supply pump and a variable frequency motor, and the variable frequency motor is connected with the second water supply pump and adjusts the rotating speed of the second water supply pump by configuring the operating frequency;
the control device is respectively connected with the hydraulic coupler and the variable frequency motor, the control device is configured to determine a scoop tube opening instruction and a variable frequency instruction according to a target rotating speed, and control the scoop tube opening of the hydraulic coupler according to the scoop tube opening instruction, and the control device is configured to control the operating frequency of the variable frequency motor according to the variable frequency instruction, so that the rotating speed of the first water feed pump and the rotating speed of the second water feed pump are synchronously adjusted.
2. The system of claim 1, wherein said first water supply further comprises a first electric motor, said first electric motor being connected to said fluid coupling, said first electric motor driving said first water supply pump through said fluid coupling.
3. The system of claim 2, wherein the fluid coupling comprises a pump impeller, a turbine, a scoop tube, and a first speed-increasing gear, an input end of the first speed-increasing gear is connected to an output shaft of the first motor, an output end of the first speed-increasing gear is connected to the pump impeller, the turbine is connected to one end of the output shaft of the fluid coupling, another end of the output shaft of the fluid coupling is connected to the first water-feeding pump, an inner cavity of the pump impeller and an inner cavity of the turbine jointly form a working cavity of the fluid coupling, and the scoop tube is configured to adjust a rotation speed of the first water-feeding pump by adjusting an amount of oil in the working cavity.
4. The system of claim 1, wherein the variable frequency motor comprises a frequency converter and a second motor, the second motor is configured to drive the second water-feeding pump to operate, the frequency converter is respectively connected with the control device and the second motor, and the frequency converter is configured to adjust the operating speed of the second motor according to the variable frequency command so as to adjust the speed of the second water-feeding pump through the second motor.
5. The system of claim 4, wherein an acceleration gear box is disposed between the second motor and the second feed water pump, the acceleration gear box comprises a second acceleration gear and a coupling, an input end of the second acceleration gear is connected with an output shaft of the second motor, and an output end of the second acceleration gear is connected to the second feed water pump through the coupling.
6. The system of any one of claims 1-5, wherein the first water supply further comprises a first pre-pump, the second water supply further comprises a second pre-pump, the first pre-pump being driven by a first motor in the first water supply, the second pre-pump being driven by a second motor in the second water supply, the first water supply pump being connected to the first pre-pump, the second water supply pump being connected to the second pre-pump.
7. The system of claim 6, wherein the second water supply is plural and the plural second water supply are connected in parallel.
8. The system according to any one of claims 1-5, wherein the control device comprises a first drum water level detector configured to detect a drum level of a boiler, and a first controller configured to determine the target rotational speed from the drum level.
9. The system according to any one of claims 1 to 5, wherein the control device comprises a second drum water level detector, a second controller, a steam flow detector, a feedwater flow detector, a subtractor, and a given regulator, the subtractor is connected to the steam flow detector and the feedwater flow detector, respectively, and is configured to determine a flow difference value based on the steam flow detected by the steam flow detector and the feedwater flow detected by the feedwater flow detector, the second controller is connected to the second drum water level detector and is configured to determine a target flow based on the drum water level detected by the second drum water level detector, and the given regulator is connected to the second controller and the subtractor, respectively, and is configured to determine the target rotation speed based on the target flow and the flow difference value.
10. A water supply installation comprising a hybrid adjustable speed drive system according to any one of claims 1 to 9.
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| CN202221729421.4U CN217735679U (en) | 2022-07-04 | 2022-07-04 | Hybrid speed-regulating transmission system and water supply equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221729421.4U CN217735679U (en) | 2022-07-04 | 2022-07-04 | Hybrid speed-regulating transmission system and water supply equipment |
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| CN202221729421.4U Active CN217735679U (en) | 2022-07-04 | 2022-07-04 | Hybrid speed-regulating transmission system and water supply equipment |
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