CN102507643A - Ventilating and temperature increasing test device for giant fully-air cooling hydraulic generator stator - Google Patents
Ventilating and temperature increasing test device for giant fully-air cooling hydraulic generator stator Download PDFInfo
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- CN102507643A CN102507643A CN2011103703310A CN201110370331A CN102507643A CN 102507643 A CN102507643 A CN 102507643A CN 2011103703310 A CN2011103703310 A CN 2011103703310A CN 201110370331 A CN201110370331 A CN 201110370331A CN 102507643 A CN102507643 A CN 102507643A
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Abstract
The present invention relates to a ventilating and temperature increasing test device for a giant fully-air cooling hydraulic generator stator, and a test method thereof. According to the present invention, in a sealed outer cover, a stator locality model is constructed, wherein the material, the size and the process of the model are the same as the material, the size and the process of the real machine; the real machine loss is simulated inside a stator bar and a stator core, and the stator loss is taken away with the air quantity of the real machine rotor and the air flows, wherein the air quantity of the real machine rotor is produced by blowers and an inner cover, and the air entering angles of the air flows are the same; the air quantity and the air flows are subjected to heat exchange with a cooler, and return back to the blowers; temperature data of all parts is collected until the thermal equilibrium is achieved, and the temperature increasing distributions of the stator bar and the stator core are determined. With the present invention, the operating condition of the real machine is really and reliably simulated, the ventilating and temperature increasing simulation test of the hydraulic generator stator can be effectively performed, the basis is provided for understanding of the cooling effect and the complete structure of the generator ventilation system, and the device is suitable for fields of hydraulic generator ventilating and cooling, and the like.
Description
Technical field
The present invention relates to a kind of huge full air-cooled hydrogenerator stator ventilation temperature rise test device.
Background technology
In the feasibility study of large hydropower station, propose to adopt the huge Hydropower Unit scheme of single-machine capacity 1000MW, therefore, the generating set of exploitation gigawatt vast capacity, high water head, high reliability is the needs of engineering construction.Along with the increase of single-machine capacity, the ventilation of motor cooling difficulty is increasing, and the ventilation cooling problem of motor becomes the problem that domestic and international manufacturing plant and research institution pay close attention to.Full air-cooled hydrogenerator is simple in structure, reliable, simple to operate, operating cost is low, easy maintenance.Under the situation that cooling power allows, large-sized water turbine generator adopts the type of cooling of full air cooling mostly at present.The gigawatt hydrogenerator does not still have the prototype that adopts full air cooling methods for cooling, needs to realize independent research.The flow field of motor heat eliminating medium is in high disturbed flow condition, and vortex motion is very complicated and have randomness, and providing accurate boundary condition is a quite problem of difficulty.Therefore, carry out working in coordination with these three kinds of means of computational analysis, power station prototype running test and model test aspect the motor ventilation heating analysis-by-synthesis.Therefore, project is carried out the development and the simulation test of stator local ventilation temperature rise model first to 1000MW level hydrogenerator.In the development of in the past huge full air-cooled hydrogenerator, still there is not the report that carries out such thermal model test.
Summary of the invention
The huge full air-cooled hydrogenerator stator ventilation temperature rise test device that can simulate the thermal equilibrium state of prototype under declared working condition that the purpose of this invention is to provide a kind of vast capacity, high water head, high reliability.Technical scheme of the present invention is: a kind of huge full air-cooled hydrogenerator stator ventilation temperature rise test device; By forming: stator core, heating plate unshakable in one's determination, stator bar, outer cover, inner cover, fan blower, refrigeratory, cooling water recirculation system, data collector, electric heater unit with lower component; Stator bar is fixed in the groove of stator core; Heating plate unshakable in one's determination is installed between the lamination of stator core; Refrigeratory is installed on the back of stator core, one section internal side diameter that places stator core of inner cover, the rotor wind path of simulation generator; Fan blower links to each other with the inner cover other end, the simulated machine air intake, and whole device is except the acquisition instrument multichannel logging of data collector, and all the other all place within the outer cover.
Model designs and manufactures the thermal model along circumferential 1/20 on the design proposal basis of the full air cooling of prototype.The local two end section cards of stator cover fire-retardant plate resistance at a distance from conducting heat, and the line rod of stator bar, employing prototype unshakable in one's determination and unshakable in one's determination comprises out frame wind path up and down simultaneously.Rotor is by wind path and blower fan simulation.In the rotor wind path, suitably simulate the air inlet angle that cooling air gets into stator.Blower fan adopts centrifugal fan, for guaranteeing the homogeneity of air quantity, adopts two blower fans up and down.
Through this model test, checking white crane beach gigawatt generator unit line rod, the temperature rise situation of stator core when full load, the finally feasibility of definite full air cooling of white crane beach gigawatt unit.In fact the full air cooling type of cooling breathe out electricity in Three Gorges right bank 756MW unit, the 700MW unit checking that has been applied in imperial beach explains that the full air cooling type of cooling can use fully on Large Hydropower Station.As long as the 1000MW hydrogenerator is carried out meticulous design and obtains modelling verification is fully feasible.The present invention has proved 1000MW level hydrogenerator, and to adopt the methods for cooling of full air cooling be feasible, broken through the judgement that the above hydrogenerator of original 700MW can not adopt full air cooling.The type of cooling of full air cooling is simple in structure, easy to maintenance, stable.
Description of drawings
Fig. 1 is a work synoptic diagram of the present invention
Embodiment
As shown in Figure 1; A kind of huge full air-cooled hydrogenerator stator ventilation temperature rise test device; By forming: stator core 1, heating plate unshakable in one's determination 2, stator bar 3, outer cover 4, inner cover 5, fan blower 6, refrigeratory 7, cooling water recirculation system 8, data collector 9, electric heater unit 10 with lower component; Stator bar 3 is fixed in the groove of stator core 1, and heating plate 2 unshakable in one's determination is installed between the lamination of stator core 1, and refrigeratory 7 is installed on the back of stator core 1; 5 one sections internal side diameters that place stator core 1 of inner cover, the rotor wind path of simulation generator; Fan blower 6 links to each other with inner cover 5 other ends, the simulated machine air intake, and whole device is except the acquisition instrument multichannel logging of data collector 9, and all the other all place within the outer cover 4.
Data collector 9 is by forming like the lower part: in 64 line rods; Choose six roots of sensation line rod as the slotted line rod, three are positioned at the upper strata, and three are positioned at lower floor; Every separated 300mm buries thermocouple temperature measurement point on the slotted line rod; The Temperature Distribution of slotted line rod, three points for measuring temperature in top bar and the lower bar are divided into three kinds of upper, middle and lower by radial direction, and the temperature survey mode of stator core adopts the RTD identical with prototype to measure temperature; Electric heater unit 10 adopts the transformer of two platform independent, for stator bar 3 and heating plate 2 unshakable in one's determination are supplied power respectively.
On the end face of both sides unshakable in one's determination, stick fire-retardant plate, wired rod is connected into one the tunnel and loads the loss of galvanic mode artificial line rod, in the middle of stator core segment, places and simulates core loss with the mode of power heating plate, and the inner cover of test-bed enters the mouth into 30 degree angles with stator.
The blast that the rotation of fan blower 6 model rotors produces, it is local that wind is blown into the stator of being made up of stator core 1, heating plate unshakable in one's determination 2, stator bar 3 by inner cover 5, takes away thermal losses.This part air and refrigeratory 7 carry out heat interchange, and heat is taken away by cooling water recirculation system 8, and cold air comes back to the inlet of fan blower 6.Accomplish in the enclosure space of whole process in outer cover 4, go round and begin again, reach thermally-stabilised back and carry out the data acquisition measurement by data collector 9.
Adopted the mode of being connected in series between each line rod of test model.Provide direct current to make an experiment through electric power systems such as strong current transformer and silicon controlled rectifiers, load DC current, make the loss of model line rod equal the loss of prototype line rod by the loss equivalence.Stator core is formed by punching silicon-steel, forms with the enamelled coating of respective thickness in surfaces coated simultaneously.Stator core is not generated heat, and adds heater element in the centre position of stator core segment of each, and its power equals the stator core segment loss.
Adopt the method identical with protype measurement to carry out air measuring at the refrigeratory place, i.e. the measurement of air quantity is adopted and is measured refrigeratory cold wind side mean wind speed, thereby calculates the method for air quantity.The big I of air quantity is adjusted blast through the rotating speed of frequency converter adjustment blower fan, thereby the design air flow of air quantity and prototype is coincide.
Pre-buried thermopair in stator bar, in the stator core with the refrigeratory front and back all pre-buried with the used identical RTD of prototype.Detect pre-buried temperature element by data collector, when temperature variation is no more than 1K in half an hour, be regarded as thermally-stabilisedly, note each temperature data this moment.
Model equipment has reflected the design feature of prototype comprehensively, and test findings provides foundation for cooling effect, the perfect frame of understanding the motor ventilation system.
As shown in Figure 1, electric energy is provided, artificial line rod and stator core loss for stator bar 3, heating plate unshakable in one's determination 2 by electric heater unit 10.The blast that the rotation of fan blower 6 model rotors produces, it is local that wind is blown into the stator of being made up of stator core 1, heating plate unshakable in one's determination 2, stator bar 3 by inner cover 5, takes away thermal losses.This part air and refrigeratory 7 carry out heat interchange, and heat is taken away by cooling water recirculation system 8, and cold air comes back to the inlet of fan blower 6.Accomplish in the enclosure space of whole process in outer cover 4, go round and begin again, reach thermally-stabilised back and carry out the data acquisition measurement by data collector 9.
Consider the periodicity that motor is circumferential, a part of model equipment intercepting stator shaft orientation makes an experiment, and its size, material, technology are all consistent with prototype, on the intercepting end face, sticks fire-retardant plate and conducts heat with isolated.Consider the even distribution of loss between the test wire rod, employing is connected into one the tunnel with the wired rod of institute and loads the loss of galvanic mode artificial line rod; In the middle of stator core segment, place mode model stator core loss with the power heating plate.Consider the actual motion direction in flow field, electric motor internal stator porch, the inner cover of test-bed enters the mouth into 30 degree angles with stator, simulates true flow field.
Claims (3)
1. huge full air-cooled hydrogenerator stator ventilation temperature rise test device; It is characterized in that: by forming: stator core (1), heating plate unshakable in one's determination (2), stator bar (3), outer cover (4), inner cover (5), fan blower (6), refrigeratory (7), cooling water recirculation system (8), data collector (9), electric heater unit (10) with lower component; Stator bar (3) is fixed in the groove of stator core (1); Heating plate unshakable in one's determination (2) is installed between the lamination of stator core (1); Refrigeratory (7) is installed on the back of stator core (1), (5) one sections internal side diameters that place stator core (1) of inner cover, the rotor wind path of simulation generator; Fan blower (6) links to each other with inner cover (5) other end, the simulated machine air intake, and whole device is except the acquisition instrument multichannel logging of data collector (9), and all the other all place within the outer cover (4).
2. a kind of huge full air-cooled hydrogenerator stator ventilation temperature rise test device according to claim 1; It is characterized in that: data collector (9) is by forming like the lower part: in 64 line rods; Choose six roots of sensation line rod as the slotted line rod, three are positioned at the upper strata, and three are positioned at lower floor; Every separated 300mm buries thermocouple temperature measurement point on the slotted line rod; The Temperature Distribution of slotted line rod, three points for measuring temperature in top bar and the lower bar are divided into three kinds of upper, middle and lower by radial direction, and the temperature survey mode of stator core adopts the RTD identical with prototype to measure temperature; Electric heater unit (10) adopts the transformer of two platform independent, for stator bar (3) and heating plate unshakable in one's determination (2) are supplied power respectively.
3. a kind of huge full air-cooled hydrogenerator stator ventilation temperature rise test device according to claim 1 and 2; It is characterized in that: on the end face of both sides unshakable in one's determination, stick fire-retardant plate; Wired rod is connected into one the tunnel and loads the loss of galvanic mode artificial line rod; In the middle of stator core segment, place and simulate core loss with the mode of power heating plate, the inner cover of test-bed enters the mouth into 30 degree angles with stator.
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| CN 201110370331 CN102507643B (en) | 2011-11-21 | 2011-11-21 | Ventilating and temperature increasing test device for giant fully-air cooling hydraulic generator stator |
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| CN 201110370331 CN102507643B (en) | 2011-11-21 | 2011-11-21 | Ventilating and temperature increasing test device for giant fully-air cooling hydraulic generator stator |
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| CN102507643B CN102507643B (en) | 2013-04-24 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103364214A (en) * | 2013-07-18 | 2013-10-23 | 北京金风科创风电设备有限公司 | Motor cooling simulation test bed and motor cooling simulation method |
| CN104766515A (en) * | 2015-03-30 | 2015-07-08 | 西南交通大学 | Experimental device and experimental method for simulating heat production of traction transformer |
| CN106053108A (en) * | 2016-05-18 | 2016-10-26 | 哈尔滨电机厂有限责任公司 | Intra-motor over-current heat exchanging simulation testing apparatus inside motor |
| CN108318817A (en) * | 2018-04-11 | 2018-07-24 | 哈尔滨电机厂有限责任公司 | A kind of hydraulic generator rotor ventilation and the simulation test device that generates heat |
| CN110068444A (en) * | 2019-03-26 | 2019-07-30 | 天津大学 | A kind of scale model tests platform of Hydropower Station river formula semi-underground power house ventilation model |
| CN110095206A (en) * | 2019-05-21 | 2019-08-06 | 浙江大学 | A kind of the temperature of rotor measurement simulation system and method for low-temperature centrifugation formula fluid machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104766515B (en) * | 2015-03-30 | 2017-10-24 | 西南交通大学 | A kind of experimental provision and its experimental method for simulating tractive transformer heat |
| CN106053108A (en) * | 2016-05-18 | 2016-10-26 | 哈尔滨电机厂有限责任公司 | Intra-motor over-current heat exchanging simulation testing apparatus inside motor |
| CN108318817A (en) * | 2018-04-11 | 2018-07-24 | 哈尔滨电机厂有限责任公司 | A kind of hydraulic generator rotor ventilation and the simulation test device that generates heat |
| CN110068444A (en) * | 2019-03-26 | 2019-07-30 | 天津大学 | A kind of scale model tests platform of Hydropower Station river formula semi-underground power house ventilation model |
| CN110095206A (en) * | 2019-05-21 | 2019-08-06 | 浙江大学 | A kind of the temperature of rotor measurement simulation system and method for low-temperature centrifugation formula fluid machinery |
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| CN102507643B (en) | 2013-04-24 |
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