CN101227129B - High-capacity non-salient pole nest plate type synchronous generator - Google Patents
High-capacity non-salient pole nest plate type synchronous generator Download PDFInfo
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- CN101227129B CN101227129B CN2007101896793A CN200710189679A CN101227129B CN 101227129 B CN101227129 B CN 101227129B CN 2007101896793 A CN2007101896793 A CN 2007101896793A CN 200710189679 A CN200710189679 A CN 200710189679A CN 101227129 B CN101227129 B CN 101227129B
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Abstract
The invention relates to a large capacity non-salient pole plate fine type synchronous generator, which is characterized in that a main generator is provided with a stator which is sleeved with a motor base split unit and a rotor which is connected with a motor base through an end cover bearing, an exciting end of a rotor rotating shaft is provided with a brushless excitation system with a high pole number, the tail end of the system is connected with a grounding detecting device, and a cooling system comprises a cooling device which is positioned on the main generator, four ducted cooling paths which circulate in multiply return circuits and are formed by a stator ventilating circuit, a rotor ventilating circuit, an air gas ventilating circuit and an exciting dynamo ventilating circuit of the main generator. The generator has the advantages of reasonable design of the whole system, compact structure, complete function of each portion, convenient installation and maintenance, reliable operating property, high quality of voltage and electric current which are produced and the like, which saves manufacturing cost.
Description
Technical field
The invention belongs to large-scale thermal power equipment turbo generator technical field, particularly a kind of high-capacity non-salient pole chip type synchronous generator.
Background technology
At present, state time generator production is based on small-sized low pole count generators, because this class generator for electricity generation capacity is little, energy utilization rate is low, number of poles is low, output voltage pole variability height, electricity consumption of more and more incompatible modern large enterprise and the requirement of networking with the outside thereof progressively develop to large-scale high-pole count generators direction at present.And high-rating generator of the prior art, the following problem of ubiquity:
(1) because the high-rating generator generate output is big; each member caloric value such as its stator and rotor winding, main shaft bearing and excitation system is very big in running; in case lack reliable and effective cooling; just influence power generating quality because of scaling loss easily; even cause stopping accident, thereby effectively cooling is one of main miscellaneous function of generator.And in existing technology, cooler is arranged on the bottom of main generator usually, when generating set is installed, must construct huge installation room at below ground, to hold cooler and installation, maintenance working space, not only installing engineering complexity, workload is big, and the cycle is long, the material consumption height.And all bring very big trouble for the maintenance of Installation and Debugging and use.Secondly, because the cooler installation site is far away with stator, the rotor distance at main cooling position, cause the cold air long transmission distance, pressure and energy loss are higher, influence cooling effect.And have only a heat exchanger in the cooler usually, in case break down, fault power time is long, influences production efficiency; Its three, generator amature is as main heat generating components, only abutment surface contact cooling air is taken away heat very little, the radiating effect difference causes failure of insulation easily, operational reliability is poor, end winding especially, centralized heat energy has the retaining ring cladding again, the easiest breaking down; Its four, generally adopt the exposure formula air-cooled to exciter, cold wind can only blow to its surface, and exciter inside is not had the effect of heat radiation, greasy dirt, dust enter internal body easily simultaneously, cause accidents such as failure of insulation, short circuit.Though in the prior art generator cooling system is updated, but cooling effect is still not ideal, and what for example have offers the axial ventilation groove in the rotor coil bottom, but because cooling air is to enter in the groove from two ends, can't circulation cycle, be difficult to the cooling effect that reaches desirable.
(2) generator pit adopts stator core and support to be structure as a whole more, and the air gap adjustment is difficulty very, mainly guarantees by the member machining accuracy, causes difficulty of processing big, the difficulty of assembling, and influence the complete machine performance.Because this kind structural rigidity is relatively poor, cause the generator vibration excessive, and heating easily, can't guarantee the harmony of air gap in the generator operation process, and produce vibration harmonics voltage, electrical network is formed harmful effect.In addition, general pedestal seat, the rolling bearing of adopting in stand structure, installation axial occupation space size is big, and sealing is poor, also influences the rigidity of stator rotating shaft.
(3) generator unit stator adopts the whole interior dress laminated structure that is connected of stator and support usually, because stator core and support are connected as a single entity, must process earlier and just can carry out stator punching behind the support and laminate, work such as coil rolls off the production line, can't concurrent job, cause the production cycle long, efficient is low, and the assembling operation trouble, time-consuming taking a lot of work.Secondly, adopt this structure, its air gap must arrive the use scene adjustment is installed, and generator needs the split packing, the split transportation, and the difficulty of transportation and expense are all than higher.And because the field adjustable assembled condition is relatively poor, in a single day air gap is adjusted bad, and problems such as harmonic fluctuations is big, organism fever can cause generating electricity.Its three, in order to prevent the loosening of stator coil end, adopt connector to be fixed on the support usually, in the generator operation process, easily because of vibration causes the damage of coil, even serious short circuit accident takes place.Its four, stator coil generally adopts whole copper cash, because the teeth groove of iron core is narrow usually, rolls off the production line and the very trouble of wrapping that insulate, time-consuming, efficient is low.
(4) armature spindle of generator generally adopts the mode of solid forging cutting fluting to make.Because rotor shaft is a slim-lined construction, thereby the production and processing cycle is long, operation is many, cost is high, the manufacturing process complexity, and also stock utilization is low.In order to improve the heat dispersion of rotor, the bottom of having plenty of wire casing under rotor shaft is provided with the heat radiation ditch, but owing to lack the radial ventilation circulation, the row of its internal heat looses and still only depends on conduction pattern to reach rotor surface, and heat dispersion does not reach desirable requirement.Secondly, the rotor of prior art adopts single damping circuit usually, and poor anti jamming capability is when using extraneous gauze to power excitation, owing to voltage, capacitance fluctuations are disturbed greatly easily.When paroxysmal abnormal running state particularly occurring, generator is stablizing of recovery system rapidly, influences the production power supply quality of this machine.
(5) present brushless excitation system adopts low pole count generators usually, and number of magnetic poles only is 4 utmost points, 6 utmost points or 8 utmost points.Therefore, the exciting current frequency of generation is low, voltage pole variability height, causes the power generating quality of main generator poor.Secondly, rectification mechanism is general to be adopted by just coiling, bear the two-sided mounting structure that dish and intermediate insulation dividing plate are formed, and rectification effect is poor, and structure is not compact.In addition, the effective cooling provision of many shortages in the existing excitation system usually causes stability bad because of influenced by temperature rise, can not guarantee the normal running status of excitation system, even initiating failure.
(6) collector ring in the generator amature shaft current ground detection device is installed between dynamo bearing and the end cap usually, and in rotating shaft, offer the radial lead hole, and the volume of collector ring is bigger, and the circumferential surface linear velocity is too high, wear of brush is fast, need often carry out Maintenance and Repair, change brush.And frequent Maintenance and Repair are usually thrown guard shield aside, make collector ring exposed outside, cause the acceleration of member wearing and tearing, particularly when the generator outdoor mounted, rainwater, greasy dirt, dust enter radially in the wiring hole easily, cause faults such as lead-in wire damage, short circuit, even lead to a disaster.In addition, the big heaviness of current collection ring body, the processing and fabricating expense of taking a lot of work expects that it is big to take up room, Maintenance and Repair are also inconvenient.
Summary of the invention
The purpose of this invention is to provide a kind of compact conformation, reasonable, reliable, installation and maintenance are easy, and the generating waveform is good, stable, make, operating cost is low, the high-capacity non-salient pole chip type synchronous generator that generating efficiency is high.
Realize that the technical scheme that purpose of the present invention is taked is: this machine is by main generator, cooling system and brushless excitation system are formed, wherein: main generator has stator that is connected with support split suit and the rotor that is connected with sole plate supports by the end cap bearing, the brushless excitation system that is provided with by high number of poles is held in encouraging of rotor shaft, and ground detection device being housed at the tail end of this system, cooling system is by the cooler that places the main generator top with by the stator wind path of main generator, the rotor wind path, four air channel cooling paths of the multiloop circulation that air gap wind path and exciter wind path constitute are formed.
Described support adopts case structure, is provided with the reinforcement dividing plate that is used to strengthen its rigidity in its both sides end plate, is laid with the reinforcement gusset between end plate and the reinforcement dividing plate, and the bottom is provided with the base that the band stator is installed adjustment hole.
The iron core one of described stator has the stator supporter that is used to adjust air gap, the stator terminal pressing plate at iron core two ends is fixedlyed connected with bearing, be laid with a plurality of coil braces on two end clamp plates, the current feed post is housed on the support, support is connected by the grouping of end hoop with end winding, and coil is formed by the polyester imines copper strap wire coiling of two halves butt joint.
Described stator supporter be by dividing plate be connected support plate and constitute, connect support plate and assemble by securing member with generator pit and be connected, dividing plate is provided with more than two at least, and is connected with the excircle of stator core.
The iron core of described rotor adopts grouping nest plate type structure, be to be contained on the rotor shaft by the folded chuck of a plurality of rotor punching groupings, and the end clamp plate and the screw rod that are provided with by two ends compress, be provided with the tooth support of band radial ducts between every group rotor punching, have the axial ventilation groove on the rotor shaft, this groove is communicated with air duct on the tooth support, and the rotor coil end is provided with the rotor center ring of belt coil support, and is set with the rotor end bell of band ventilation hole.
Described rotor core is provided with two damping circuits, and one is connected and composed by amortisseur bar on the rotor canine tooth and end clamp plate, and another is connected and composed by rotor end bell and slot wedge.
Be laid with a plurality of ventilation holes on the coil brace of described rotor center ring, this ventilation hole is connected with the axial ventilation groove of rotor shaft.
The outside of described brushless excitation system is the closed shell that is connected with the support of main generator, case top is provided with the outlet and inlet pipeline that is communicated with the main generator cooling system, inside is provided with and the rigidly connected excitation main shaft of the rotor shaft of main generator, is set with excitation generator and permanent magnetism pilot exciter with its cooling fan that rotates synchronously, rotary rectifier assembly, high number of poles successively by connecting bushing respectively on the main shaft.
Described excitation generator adopts 10 utmost point revolving-armature type three-phase synchronous generators, and its rotating armature is located on the rotor, and magnetic pole is fixed on the stator, and is provided with damping ring on pole core.
Described permanent magnetism pilot exciter adopts 16 utmost point three-phase synchronous permanent-magnet generators, and the permanent magnetism magnetic pole of this machine is fixed on the rotor, pole shoe by screw on connecting bushing.
Described rotary rectifier assembly by a rotating rectifier dish, 12 rectifier diodes and the positive and negative electrode slip ring that is used to export exciting current form, the rectifier diode single face is installed on the rotating rectifier dish, and connect with excitation generator by 6 brachium pontis respectively, each brachium pontis is parallel with 2 diodes, constitute three-phase bridge rectification thus, collector ring directly is sleeved on the excitation main shaft, and connects with rectifier diode by conductive connection.
Described ground detection device is by collector ring component, brush, terminal box is formed, wherein, collector ring component is installed in the tail end of exciter main shaft, the outside is covered with airtight protective cover, be by the collector ring support that has ground loop, the collector ring that is molded as one by insulating part and collector ring support is formed with the conductive connector that is installed on the collector ring, the centre of support is provided with the lead hole that is communicated with the rotor shaft centre bore, be installed on the cantilever pole with the brush of collector ring and ground loop sliding contact, this pole is packed on the end plate of protective cover one side, and brush is connected by the terminal box of lead with the protective cover end plate outside.
The return air baffler that two cover heat exchanger package is set in the described cooler and is communicated with heat exchanger package respectively, every cover heat exchanger package is made up of the heat exchanger of two phases and cascade.
Described rotor cooling air duct is to be made of the radial ducts that between the rotor core nest plate of axial ventilation groove of offering on the rotor shaft and connection with it and rotor coil end is provided with respectively.
Described stator cooling air duct is to be made of the main generator return air district that cavity between the radially return air channel on stator coil end cooling zone, the stator core and stator end plate and the stator dividing plate forms.
Described air gap cooling air duct is to be made of the axial air-gap passage that is provided with between stator, the rotor, and this air gap channel is communicated with the radial ducts and the stator cooling air duct of rotor respectively.
Described exciter wind path is that the air gap channel by advancing of forming of gap between advancing of being communicated with main generator cooling air duct air intake district, return air duct and excitation generator two ends and the exciter housing, return air district and excitation generator constitutes.
According to the above-mentioned high-capacity non-salient pole chip type synchronous generator of making, its beneficial effect is:
(1) this generator adopts stator and support split-type structural, can carry out rolling off the production line and the adjustment of air gap of stator coil quickly and easily, guarantee the concentric precision of air gap, and can reduce the making precision of each member and the difficulty that integral installation is adjusted, shorten the production cycle, and Installation and Debugging can finish before dispatching from the factory all, thereby can realize whole Transporting, integral installation, shorten the on-the-spot Installation and Debugging cycle greatly, save installation, freight.
(2) main generator adopts four tunnel circulation cooling paths, and offer respectively in rotor shaft, rotor core and rotor coil end axially and radial ducts, interior each air quantity of generator is distributed rationally, can control the temperature rise of stator, rotor effectively, make each member of main generator all can obtain desirable cooling, thereby can eliminate generator effectively because of the various operation troubless that heating causes, improve the generating efficiency of generator greatly.Simultaneously, exciter is carried out closed circulation cooling, can receive better heat radiating effect, can avoid the intrusion of greasy dirt, dust again, protect the normal operation of excitation system effectively, prolong the useful life of exciter.
(3) cooler adopts the overhead structure, and installation and maintenance are convenient, and huge heavy pit foundation plinth need not be constructed in the scene of using, and can save a large amount of mounting costs, shortens installation period; And heat exchanger adopts two groups of cascade structures; can strengthen the operational reliability and the fail safe of cooling system greatly; even if under the part heat exchanger breaks down the situation that lost efficacy or keeped in repair, can ensure that still generator moves under 66% low load condition, can avoid the generation of machine halt trouble effectively.
(4) on rotor, be provided with two damping circuits, thereby can guarantee that generator is in good running status all the time, improve the reliability and stability of electrogenesis quality and generator operation.
(5) exciter and permanent magnetic motor all select to dispose high number of poles three-phase synchronous AC generator in the generator brushless excitation system, the frequency height, response is fast, and cooling system improves reliable, can be for main generator provide harmonic wave desirable exciting current, and have reliable, reasonable in design, complete function, compact conformation, long service life, advantage such as convenient for installation and maintenance.
(6) ground detection device of generator is arranged on the tail end of exciter main shaft, and the insulation of whole collector ring adopts the moulding compound cast to form, and reduced taking up room of collector ring greatly, reduced cost of manufacture, keep in repair conveniently, and help improving the sealing of whole generator.
(7) it is reasonable that this generator has global design, compact conformation, advantage such as each function is complete perfect, and runnability is reliable, and voltage, the electric current of production are best in quality, and installation and maintenance are convenient, and productions, installation effectiveness height, cycle are short, and manufacturing, installation cost are low.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of support among Fig. 1;
Fig. 3 is the structural representation of main generator unit stator;
Fig. 4 is the structural representation of main generator rotor;
Fig. 5 is the partial enlarged drawing of B among Fig. 4;
Fig. 6 is the cutaway view of A-A among Fig. 4;
Fig. 7 is the structural representation of brushless exciter of the present invention;
Fig. 8 is the partial enlarged drawing of I among Fig. 7;
Fig. 9 is a ground detection device structural representation of the present invention.
Embodiment
Referring to Fig. 1, high-capacity non-salient pole chip type synchronous generator of the present invention is made up of main generator I, cooling system II, brushless excitation system III and ground detection device IV.Wherein: main generator I has the stator 3 that is connected with box support 1 split suit and passes through the rotor 4 of end cap bearing 2 support and connection in support 1 centre.The cooling system of generator is made of the cooler 5 that is used for heat exchange and main generator cooling air duct and exciter cooling air duct, wherein cooler 5 places the top of box support 1, so that installation and maintenance, also can save at below ground and construct huge basic installation room, make the generator complete machine structure compact more, and can shorten the fed distance of cooling air, reduce the pressure and the energy loss of course of conveying.In order to strengthen the operational reliability of heat-exchange system; the herringbone return air baffler 5-2 that two cover heat exchanger package 5-1 is housed in the cooler 5 and is communicated with two groups of heat exchangers respectively; every cover heat exchanger package 5-1 is made up of the heat exchanger of two phases and cascade; in two cover heat exchanger package 5-1, there is a heat exchanger to break down; generator still can normally move the shutdown loss in the time of can reducing maintenance under the situation with load more than 66%.The setting of return air baffler 5-2 can make the mobile current stabilization state that is in of taking hot-air of return air channel 1-3, and avoids forming eddy current or circulation dead angle.Cooling air in the cooler 5 respectively by advance, return air channel 1-2,1-3 be communicated with the air intake district f1 and the return air district f2 of main generator.
The main generator cooling air duct comprises return air district f2 and stator wind path, rotor wind path and the air gap wind path that surrounds with support 1 inwall between two air intake district f1, the stator dividing plate 3-4 that is formed by space between stator end plate 3-6 and the support two ends reinforcement dividing plate 1-2.Cooling air in the cooler 5 enters each wind path respectively after entering air intake district f1 by the air intake passage mouth 1-3 at cooler 5 and support 1 top under the graviational interaction of rotor fan 4-5.
In conjunction with Fig. 1, referring to Fig. 2, generator pit 1 adopts case structure, so that as the support of top cooler 5.In order to strengthen the main generator whole rigidity, reduce vibration, be provided with the reinforcement dividing plate 1-2 parallel with end plate in the inboard of support 1 two end plates 1-1, be laid with a plurality of reinforcement gusset 1-3 between end plate 1-1 and the reinforcement dividing plate 1-2.The base 1-4 that support 1 bottom is used to support and install stator 3 is provided with cross elongated slot adjustment hole 1-5, adjust the left-right and front-back position of stator 3 when being used to install, and by increasing and decreasing the high and low position that pad adjustment stator 3 is installed, thus the air gap between stator 3 and the rotor 4 is adjusted, make that main generator I's is easy to assembly quick, also can reduce requirement greatly, enhance productivity, reduce production cost each member machining accuracy.
In conjunction with Fig. 1, Fig. 2, referring to Fig. 3, the stator 3 of main generator comprises stator core 3-1, stator coil 3-2 and stator supporter, wherein, stator core 3-1 is made up of a plurality of arranged in groups and the segmental punching that is installed on the dove tail support bar 3-3, the return air channel that the gap that is provided with between each segmental punching group is configured for cooling, stator supporter is provided with dividing plate 3-4 and is connected support plate 3-5, stator core is installed in the dividing plate 3-4, and be welded to connect and be one, the cavity that surrounds between two end clamp plate 3-6 and dividing plate 3-4 and the generator pit 1 constitutes the cooling return air wind district f2 of the main generator I that is communicated with the radially return air channel of stator core 3-1; Connecting support plate 3-5 is used for being connected with the base 1-4 of generator pit 1, when generator is assembled, stator 3 integral body can be installed in the casing of support 1, connecting support plate 3-5 adopts securing member to be connected with support base 1-4, and by the cross chute 1-5 that offers on the base 1-4 and regulate pad and carry out the adjustment in six orientation, top to bottom, left and right, front and rear of stator 3 installation sites, guarantee the concentricity of the Precise Installation Position and the air gap of stator 3 thus reliably.The stator terminal pressing plate 3-6 at stator core 3-1 two ends is with to be connected support plate 3-5 fixedly connected, the outer face of two end clamp plate 3-6 is evenly equipped with a plurality of coil brace 3-7, this coil brace 3-7 is connected by end hoop 3-8 grouping with stator coil 3-2 end, and firm with washing the colligation of glass rope.Like this, in the generator operation process, coil brace 3-7 and stator coil 3-2 are with the vibration of stator one, and coil 3-2 neither can get loose, and also can not damage, and can improve the cooling effect of stator coil 3-2 end simultaneously.According to the needs of stator coil 3-2 electric current lead-out wire, insulating part 3-9 and stem 3-10 are housed on the coil brace 3-7 of stator terminal pressing plate 3-6 one end.The polyester imines copper strap wire coiling that stator coil 3-2 adopts two halves to fasten can reduce the difficulty that rolls off the production line and insulate wrapping greatly, saves the activity duration.Adopt this stator structure, can carry out the general assembly of generator before dispatching from the factory, and adjust air gap, carry out complete machine transportation, whole machine installation, the air gap adjustment is carried out at the scene of need not arriving again, can shorten on-the-spot installation period effectively.The stator cooling air duct comprises stator coil end cooling zone f3, the radially cooling air channel of stator core 3-1 reaches and the shared air gap channel of air gap cooling air duct, the cooling air of air intake district f1 enters the rear side of stator coil 3-2 end under the centrifugal action of rotor fan 4-5, converge entering with the air gap cooling air duct after the cooling of stator coil 3-2 end, and flow into return air district f2 through the radially return air channel of stator core 3-1, return air channel mouth 1-4 by support 1 top flows into cooler 5, thereby to stator coil 3-2 end, the inner surface of stator core 3-1, the outer surface of rotor 4 and stator coil 3-2, the punching of stator core 3-1 is effectively cooled off.
In conjunction with Fig. 1, referring to Fig. 4, Fig. 5, Fig. 6, rotor 4 of the present invention adopts grouping nest plate type structure, this structure is to be contained on the rotor shaft 4-1 by the folded chuck of a plurality of rotor punching 4-3 groupings to constitute rotor core, each organizes the tooth support 4-11 that all clamps between the punching with a plurality of radial ducts, and the two ends of iron core compress by rotor pressing plate 4-6 and screw rod 4-7.Have axial ventilation groove 4-12 on the rotor shaft 4-1, and be communicated with air duct on the tooth support 4-11.In the generator operation process, refrigerating gas is entered by these axial ventilation groove two ends, air duct through tooth support 4-11 flows into air gap, and is back in the cooler 5 by the radially return air channel of stator 3, can make rotor coil 4-2 and punching 4-3 can both receive good result of ventilating heat dissipation.On rotor center ring 4-8, have coil brace 4-9, rotor coil 4-2 end is clamped between support 4-9 and the retaining ring 4-4 securely, can protect the unlikely damage of rotor coil 4-2 effectively, also strengthened the stationarity of rotor running.Rotor tip is the position that heat is comparatively concentrated, therefore equal correspondence is furnished with a plurality of ventilation hole 4-4a, 4-10 that are connected with the axial ventilation groove 4-12 of rotating shaft 4-1 on the coil brace 4-9 of rotor end bell 4-4 and centering ring 4-8, and form radial ducts with slit in the middle of the coil, the refrigerating gas that can make air intake district f1 at first effectively cools off rotor tip by the axial ventilation groove 4-12 of rotor shaft 4-1 and the ventilation hole 4-10 on rotor end bell 4-4, the coil brace 4-9 under the effect of rotor rotary centrifugal force.Rotor is provided with two damping circuits, and wherein one is made of the amortisseur bar 4-13 and the rotor-end pressing plate 4-6 that are installed on the rotor canine tooth, and another is connected and composed by rotor end bell 4-4 and rotor slot wedge (not shown).Like this, when temporary the beating of electric current occurring by enchancement factor, can lean on the hindrance function of rotor self to reduce influence of fluctuations, and make generator operation recover normal rapidly.In addition, in order to strengthen the operating rigidity of fan 4-5, rotor fan 4-5 is directly installed on the rotor center ring 4-8, also makes structure compact more simultaneously.
The rotor cooling air duct comprises rotor core and the cooling air channel at rotor coil 4-2 middle part and the rotor coil 4-2 end cooling air channel that is formed by the ventilation hole 4-10 on retaining ring 4-4 and the coil brace 4-9 that is made of the radial ducts on the tooth support 4-11 in the axial ventilation groove 4-12 in the rotating shaft, the rotor core.In the generator operation process, under the effect of rotor rotary centrifugal force, cooling air is entered the axial ventilation groove 4-12 of rotor shaft by air intake district f1, and by two radial ducts punching 4-3, rotor coil 4-3 and the end thereof of rotor core are cooled off respectively, import the air gap wind path then.
Referring to Fig. 7, Fig. 8, brushless excitation system III of the present invention is made up of exciter housing 5-1, excitation main shaft 5-2, excitation generator 5-4, permanent magnetism pilot exciter 5-6, cooling fan 5-3, rotating rectifier dish assembly 5-5.For good ventilation cooling condition is provided, avoid the infringement of each member effectively and break down, exciter housing 5-1 adopts the case structure of sealing, this housing is connected the excitation end of main generator support, its top is provided with outlet and inlet pipeline 5-7, the 5-8 that is communicated with the air intake district f1 of main generator cooling system, can guarantee the cleaning of cooling air.Simultaneously, the cooled hot-air of excitation system is entered the recycling of main generator cooling system, to receive energy-saving effect preferably.The inside of exciter housing 5-1 is provided with excitation main shaft 5-2, and is rigidly connected with main generator rotor rotating shaft 4-1, makes complete machine structure compact more.Cooling fan 5-3, excitation generator 5-4, rotary rectifier assembly 5-5 and permanent magnetism pilot exciter 5-6 are sleeved on the excitation main shaft 5-2 successively by adapter sleeve respectively, and all the rotor shaft 4-1 with main generator rotates synchronously.For frequency and the response speed that improves exciting voltage, provide harmonic wave desirable exciting current to main generator, excitation generator adopts 10 utmost point revolving-armature type three-phase synchronous generators, its magnetic pole is located on the stator, armature is located on the rotor, and on the pole core of stator, damping ring is housed, be used to eliminate the fluctuation of magnetic flux, and guarantee the stability of excitation current waveform thus.For guaranteeing that exciting current has good harmonic wave forms, make the exciter structure compact more simultaneously, rotary rectifier assembly 5-5 adopts the structure of single-deck installation and supporting slip ring output current, it is by rotating rectifier dish 5-5a, rectifier diode 5-5b and just be used to export exciting current, negative pole slip ring 5-5d forms, wherein be installed on the rotating rectifier dish 5-5a by 12 rectifier diode 5-5b single faces, and connect with excitation generator 5-4 by 6 brachium pontis 5-5c respectively, each brachium pontis 5-5c is parallel with 2 rectifier diode 5-5b, constitute three-phase bridge rectification thus, slip ring 5-5d directly is sleeved on the excitation main shaft 5-2, and connects with rectifier diode 5-5b by lead.
The permanent magnetism pilot exciter 5-6 of this excitation system configuration adopts 16 utmost point three-phase synchronous permanent-magnet generators, and being used for this excitation generator provides high-frequency, the desirable excitation voltage of harmonic wave.Its magnetic pole is fixed on the rotor, pole body adopt coercive force by force, the permanent-magnet steel that do not demagnetize makes, pole shoe is made with steel plate, pole shoe by screw on axle sleeve.Its rotor and excitation generator and the coaxial rotation of main generator, thus make the generating set complete machine become a totally enclosed free-running system, can cooperate by each component synergism, guarantee the ideal effect of complete machine operation.The cooling fan 5-3 that is used for the cold wind circulation adopts centrifugal fan, graviational interaction by this fan, cooling air enters exciter housing 5-1 by intake stack 5-8, after excitation generator 5-4, rotary rectifier assembly 5-5 and permanent magnetism pilot exciter 5-6 cooled off, discharge from the wind pipe 5-7 of opposite side, can guarantee the normal operation of excitation generator reliably.The exciter wind path is that the air gap channel by advancing of forming of gap between advancing of being communicated with main generator cooling air duct air intake district f1, return air duct 5-7,5-8 and excitation generator 5-4 two ends and the exciter housing 5-1, return air district and excitation generator 5-4 constitutes.Under the graviational interaction of exciter cooling fan 5-3, excitation generator 5-4, rotating rectifier dish 5-5 and permanent magnetism pilot exciter 5-6 are effectively cooled off, the cooled hot-air of taking flows into the air intake district of main generator through return air duct, and is used for the utilization once more of main generator cooling air duct circulation.
Referring to Fig. 9, ground detection device IV of the present invention is by collector ring support 6-1, insulating part 6-2, collector ring 6-3, conductive connector 6-4, brush 6-10, protective cover 6-12, terminal box 6-9 forms, wherein, collector ring 6-1 support is installed in the tail end of exciter main shaft 5-2, and be molded as firm overall structure by epoxy resins insulation spare 6-2 and collector ring 6-3, not only can reduce the overall structure of collector ring 6-3 greatly, can guarantee simultaneously the concentricity of collector ring 6-3 and rotor shaft 4-1 and exciter main shaft 5-2 again, realize the steady of its high speed rotating, reduce the wearing and tearing of brush 6-10.Have the shaft current ground loop on the collector ring support 6-1, and be provided with the lead hole 6-5 that is communicated with rotor shaft 4-1 and exciter main shaft 5-2 centre bore, its tail end is equipped with the conductive connector 6-4 of insulation with it, the lead-out wire of rotor coil 4-2 passes the centre bore of rotor shaft 4-1 and the lead hole 6-5 on the collector ring support 6-1, and connect with collector ring 6-3 by conductive connector 6-4, the exciting curent of rotor coil 4-2 is caused on the collector ring 6-3.Be installed on the cantilever pole 6-11 with the brush 6-10 of collector ring 6-3 and ground loop sliding contact, this pole is packed on the protective cover side plate 6-6, and the brush 6-10 that is used for projected current is connected with protective cover side plate 6-6 terminal box 6-9 outward by lead.Lead on its brush 6-10 passes the through hole and the interior corresponding connection of binding post 6-8 of terminal box 6-9 on the protective cover side plate 6-6, and by the through wires hole 6-7 of terminal box 6-9 draw with outside detection control cubicle in electric elements link, wherein the electric current of being drawn by ground loop is used to detect the fluctuation situation of shaft current and rotor coil electric current on the one hand, on the other hand by ground connection behind the detection control cubicle, the inductive axis electric current of alternator shaft is caused underground, to avoid causing faults such as short circuit.Protective cover 6-12 is provided with the watch window with the transparent cover plate sealing, can directly monitor the ruuning situation of collector ring 6-3 and brush 6-10 in the running, also can open cover plate when maintenance or replacing brush 6-10 operates, both can reduce the protective cover 6-12 integral disassembly, assembly frequency, also can prevent the intrusion of foreign material, dust and water, oil effectively, guarantee the normal operation of generator, protective cover 6-12 also can whole make with transparent material.This ground detection device is installed in exciter main shaft 5-2 tail end, the insulation of whole collector ring adopts the moulding compound cast to form, structure is small and exquisite, not only cost of manufacture can reduce greatly, and help improving the sealing of whole generator, especially reducing of collector ring 6-3 diameter can reduce the linear velocity of its circular motion greatly, reduces wear of brush consumption and maintenance cost thus more than 50%.In addition, the signal of telecommunication is drawn from the centre bore of rotor shaft 4-1 and exciter main shaft 5-2, need not axle radially open fairlead, can guarantee the intensity of exciter main shaft 5-2 and the stationarity of high speed rotating thereof.
Claims (16)
1. high-capacity non-salient pole chip type synchronous generator, be by main generator, cooling system and brushless excitation system are formed, it is characterized in that: main generator has stator that is connected with support split suit and the rotor that is connected with sole plate supports by the end cap bearing, the brushless excitation system that is provided with by high number of poles is held in encouraging of rotor shaft, and ground detection device is housed at the tail end of this system, cooling system is by the cooler that places the main generator top with by the stator wind path of main generator, the rotor wind path, four air channel cooling paths of the multiloop circulation that air gap wind path and exciter wind path constitute are formed, the iron core of described rotor adopts grouping nest plate type structure, be to be contained on the rotor shaft by the folded chuck of a plurality of rotor punching groupings, and the end clamp plate and the screw rod that are provided with by two ends compress, be provided with the tooth support of band radial ducts between every group rotor punching, have the axial ventilation groove on the rotor shaft, this groove is communicated with air duct on the tooth support, the rotor coil end is provided with the rotor center ring of belt coil support, and is set with the rotor end bell of band ventilation hole.
2. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: described support adopts case structure, be provided with the reinforcement dividing plate that is used to strengthen its rigidity in its both sides end plate, be laid with the reinforcement gusset between end plate and the reinforcement dividing plate, the bottom is provided with the base that the band stator is installed adjustment hole.
3. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: the iron core one of described stator has the stator supporter that is used to adjust air gap, the stator terminal pressing plate at iron core two ends is fixedlyed connected with bearing, be laid with a plurality of coil braces on two end clamp plates, the current feed post is housed on the support, support is connected by the grouping of end hoop with end winding, and coil is formed by the polyester imines copper strap wire coiling of two halves butt joint..
4. high-capacity non-salient pole chip type synchronous generator according to claim 3, it is characterized in that: described stator supporter be by dividing plate be connected support plate and constitute, connecting support plate is connected by the securing member assembling with generator pit, dividing plate is provided with more than two at least, and is connected with the excircle of stator core.
5. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: described rotor core is provided with two damping circuits, article one, connected and composed by amortisseur bar on the rotor canine tooth and end clamp plate, another is connected and composed by rotor end bell and slot wedge.
6. high-capacity non-salient pole chip type synchronous generator according to claim 1 is characterized in that: be laid with a plurality of ventilation holes on the coil brace of described rotor center ring, this ventilation hole is connected with the axial ventilation groove of rotor shaft.Described stator coil is made of the polyester imines copper strap wire winding of two halves butt joint.
7. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: the closed shell of the outside of described brushless excitation system for being connected with the support of main generator, case top is provided with the outlet and inlet pipeline that is communicated with the main generator cooling system, inside is provided with and the rigidly connected excitation main shaft of the rotor shaft of main generator, is set with excitation generator and permanent magnetism pilot exciter with its cooling fan that rotates synchronously, rotary rectifier assembly, high number of poles successively by connecting bushing respectively on the main shaft.
8. high-capacity non-salient pole chip type synchronous generator according to claim 7, it is characterized in that: described excitation generator adopts 10 utmost point revolving-armature type three-phase synchronous generators, its rotating armature is located on the rotor, and magnetic pole is fixed on the stator, and is provided with damping ring on pole core.
9. high-capacity non-salient pole chip type synchronous generator according to claim 7, it is characterized in that: described permanent magnetism pilot exciter adopts 16 utmost point three-phase synchronous permanent-magnet generators, the permanent magnetism magnetic pole of this machine is fixed on the rotor, pole shoe by screw on connecting bushing.
10. high-capacity non-salient pole chip type synchronous generator according to claim 7, it is characterized in that: described rotary rectifier assembly by a rotating rectifier dish, 12 rectifier diodes and the positive and negative electrode slip ring that is used to export exciting current form, the rectifier diode single face is installed on the rotating rectifier dish, and connect with excitation generator by 6 brachium pontis respectively, each brachium pontis is parallel with 2 diodes, constitute three-phase bridge rectification thus, collector ring directly is sleeved on the excitation main shaft, and connects with rectifier diode by conductive connection.
11. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: described ground detection device is by collector ring component, brush, terminal box is formed, wherein, collector ring component is installed in the tail end of exciter main shaft, the outside is covered with airtight protective cover, be by the collector ring support that has ground loop, the collector ring that is molded as one by insulating part and collector ring support is formed with the conductive connector that is installed on the collector ring, the centre of support is provided with the lead hole that is communicated with the rotor shaft centre bore, be installed on the cantilever pole with the brush of collector ring and ground loop sliding contact, this pole is packed on the end plate of protective cover one side, and brush is connected by the terminal box of lead with the protective cover end plate outside.
12. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: the return air baffler that two cover heat exchanger package is set in the described cooler and is communicated with heat exchanger package respectively, every cover heat exchanger package is made up of the heat exchanger of two phases and cascade.
13. high-capacity non-salient pole chip type synchronous generator according to claim 1 is characterized in that: described rotor cooling air duct is to be made of the radial ducts that between the rotor core nest plate of axial ventilation groove of offering on the rotor shaft and connection with it and rotor coil end is provided with respectively.
14. high-capacity non-salient pole chip type synchronous generator according to claim 1 is characterized in that: described stator cooling air duct is to be made of the main generator return air district that cavity between the radially return air channel on stator coil end cooling zone, the stator core and stator end plate and the stator dividing plate forms.
15. high-capacity non-salient pole chip type synchronous generator according to claim 1, it is characterized in that: described air gap cooling air duct is to be made of the axial air-gap passage that is provided with between stator, the rotor, and this air gap channel is communicated with the radial ducts and the stator cooling air duct of rotor respectively.
16. high-capacity non-salient pole chip type synchronous generator according to claim 1 is characterized in that: described exciter wind path is that the air gap channel by advancing of forming of gap between advancing of being communicated with main generator cooling air duct air intake district, return air duct and excitation generator two ends and the exciter housing, return air district and excitation generator constitutes.
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| CN2007101896793A CN101227129B (en) | 2007-10-08 | 2007-10-08 | High-capacity non-salient pole nest plate type synchronous generator |
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| CN2007101896793A CN101227129B (en) | 2007-10-08 | 2007-10-08 | High-capacity non-salient pole nest plate type synchronous generator |
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| CN101227129B true CN101227129B (en) | 2011-09-07 |
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