CN103078454A - Heating device and method for assembling rotating shaft of generator by using same - Google Patents
Heating device and method for assembling rotating shaft of generator by using same Download PDFInfo
- Publication number
- CN103078454A CN103078454A CN2012105932785A CN201210593278A CN103078454A CN 103078454 A CN103078454 A CN 103078454A CN 2012105932785 A CN2012105932785 A CN 2012105932785A CN 201210593278 A CN201210593278 A CN 201210593278A CN 103078454 A CN103078454 A CN 103078454A
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- diameter end
- heater
- miner diameter
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 230000000630 rising effect Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000004519 grease Substances 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 3
- 210000003746 feather Anatomy 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 230000001050 lubricating effect Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Disclosed are a heating device and a method for assembling a rotating shaft of a generator using the same, the heating device comprising: the heating device comprises a shell, a heating device and a heating device, wherein the shell is provided with an inner cavity, a rotating shaft to be heated is placed in the inner cavity, the small-diameter end of the rotating shaft is placed upwards, and a front bearing is installed in the small-diameter end; the driving motor is arranged at the bottom of the shell; the centrifugal fan is driven by the driving motor and is connected above the driving motor; the electric heat source is arranged above the centrifugal fan and is positioned in the rotating shaft; and the flow guide jet device is arranged at the middle upper part of the cavity and at least positioned outside the small-diameter end of the rotating shaft, and forms a rising channel of hot air with the inner wall of the shell, so that the heated air flows out from the bottom of the rotating shaft, rises along the inner wall of the shell, rushes out from the flow guide jet device and impacts the small-diameter end of the rotating shaft, the small-diameter end of the rotating shaft expands before the front bearing, and the expansion speed of the small-diameter end is greater than that of the front bearing. The invention obviously improves the assembly precision and efficiency of the rotating shaft.
Description
Technical field
The present invention relates to wind-driven generator assembling field.More particularly, the present invention relates to a kind of heater and use the assembly method of the alternator shaft of this heater.
Background technology
For large-scale direct-drive permanent magnet wind power generator, two bearings, i.e. fore bearing and rear bearing are installed by interference fit in the rear and front end between generator unit stator main shaft and the alternator shaft.Fore bearing is between stator main shaft and rotating shaft miner diameter end, near the impeller hub that is connected with flange in the rotating shaft; Rear bearing is between stator main shaft and rotating shaft bigger diameter end.Impeller blade is fixed on the impeller hub, by driving generator amature between rotating shaft.Generally, fore bearing adopts taper roll bearing (BT bearing), and rear bearing adopts cylinder roller bearing (NT bearing).At present, generally adopt temperature differential method for the assembling of BT bearing and NT bearing, realize the interference assembling of bearing.
Referring to figs. 1 through Fig. 9, the assembly method of BT bearing and NT bearing approximately comprises the steps:
(1) generator unit stator main shaft 1 is vertically fixed on the erecting bed, by induction heater inner ring 3 heating of NT bearing is expanded to the swell increment that meets the demands, it is inserted in stator main shaft 1;
(2) by cooling cabinet outer ring 4 coolings of the first outer ring 5 of BT bearing and NT bearing are contracted to the amount of contraction that meets the demands after, be respectively charged into the bearing installed surface of miner diameter end 202 of alternator shaft 2 and the bearing installed surface of bigger diameter end 201;
The rotating shaft 2 that (3) the first outer ring 5 of the outer ring 4 of NT bearing and BT bearing will be installed is enclosed within on the stator main shaft 1, and the outer ring 4 of NT bearing is enclosed within on the inner ring 3 of NT bearing;
(4) by heater inner ring 6 and 7 heating of the second outer ring of BT bearing are expanded to the swell increment that meets the demands, between the miner diameter end 202 of successively both are packed into stator main shaft 1 and rotating shaft 2.
So far, the bearing of generator forms an integral body, and when treating that bearing temperature returns to room temperature state, the main shaft of generator forms interference and connects.
The bearing of the electric machine structure of, lighter weight less for the rotating shaft yardstick is installed, and this is easier assembly method in the temperature differential method assembling.In assembling process, only need some parts to bearing heat to swell or cool off contraction and can finish assembling.But for having large scale, the direct wind-driven generator of large quality, need to adopt large-scale driving lifting and tooling device during bearing assemble, and when assembling, since the outer ring of NJ bearing and retainer with the assembling process of inner ring in do not have visual concrete measure, the inner ring of the NT bearing on the outer ring of NT bearing and the stator main shaft can't be realized accurate the aligning, installation personnel fully by virtue of experience is installed to rotating shaft on the stator main shaft, the bump that retainer and inner ring in installation, can occur inevitably, like this, the damage that may bump of all parts of bearing, cause significantly reduce the useful life of bearing, improved production cost.In addition, the outer ring of bearing and the gap of inner ring are less, may need repeatedly to reinstall, so that the precision of assembling is not high, efficient is not high yet, has directly reduced the performance of wind-driven generator, and has improved assembly cost.
Therefore, how high accuracy, finish the assembling of bearing efficiently, and be those skilled in the art's technical issues that need to address the useful life of improving bearing.
Summary of the invention
The purpose of this invention is to provide a kind of heater, to realize that processing is expanded in the heating of alternator shaft and fore bearing.Another object of the present invention provides a kind of assembly method of using the alternator shaft of this heater, finishing efficiently, accurately the assembling of alternator shaft, and improves the useful life of bearing and the performance of wind-driven generator.
To achieve these goals, the invention provides a kind of heater, described heater comprises:
Housing has inner chamber, and rotating shaft to be heated is placed in the described inner chamber, and the miner diameter end of described rotating shaft is placed up, and in the miner diameter end fore bearing is installed;
Drive motors is arranged on the bottom of described housing;
Centrifugal blower is arranged on the below of rotating shaft, drives and be connected to described drive motors top by described drive motors;
Electric heat source is arranged on the top of described centrifugal blower, and it is inner to be positioned at described rotating shaft;
The water conservancy diversion fluidic device, be arranged on the middle and upper part of described cavity, and the miner diameter end that is positioned at least described rotating shaft is outside, form the rising passway of hot-air with the inwall of described housing, so that after heated air flows out from the bottom of described rotating shaft, rise along the inwall of described housing, and in described water conservancy diversion fluidic device, go out, strike the miner diameter end of described rotating shaft, the miner diameter end of described rotating shaft is expanded prior to described fore bearing, and the speed of expansion of miner diameter end is greater than the speed of expansion of described fore bearing.
Preferably, described housing comprises inside and outside at least two-layered steel plates, is filled with insulation material between described steel plate.
Preferably, described drive motors is in the bottom of described housing at least between the two-layered steel plates.
Preferably, described heater also comprises bracing or strutting arrangement, and described rotating shaft is placed on the described bracing or strutting arrangement.
Preferably, described bracing or strutting arrangement comprises the supported at three point part of the bottom that is arranged on described housing.
Preferably, described heater also comprises stopping means, limits with the relative position to described rotating shaft and described housing.
Preferably, described stopping means comprises the restriction protrusion that is arranged on described bracing or strutting arrangement top and projects upwards.
Preferably, between the top of the top of described rotating shaft and described housing, be provided with surge chamber.
Preferably, be provided with network at the top of described inner chamber, described surge chamber is positioned at the middle position of described network.
Preferably, described water conservancy diversion fluidic device comprises:
The annular baffle, described annular baffle covers from described rotating shaft flange at least to the part of miner diameter end, forms rising passway with the inwall with described housing; And
The annular jet device, described annular jet device is positioned at the top of described annular baffle, and be centered around the periphery of the miner diameter end of described rotating shaft, and outstanding towards the miner diameter end of described rotating shaft, form the voltage stabilizing space with the inwall with described housing, offering a plurality of jets in the face of the sidewall of miner diameter end, so that hot-air is from described jet ejection and strike miner diameter end.
Preferably, described heater also comprises oil-collecting device, and to reclaim bearing grease, the top of described oil-collecting device is suspended on the top of described housing, and the lower end touches the inwall of described rotating shaft.
Preferably, described oil-collecting device comprises from top to bottom gradually wealthy oil drain pan and is arranged on the crossbeam on the top of described oil drain pan, described crossbeam is along on the end face that radially is placed on described rotating shaft of described rotating shaft, described oil drain pan is suspended on by described crossbeam in the miner diameter end of described rotating shaft, and described oil drain pan feather edge is formed with the crimping that contacts with the inwall of miner diameter end.
Preferably, the bottom surface of described inner chamber be shaped as upwardly extending arc, so that the hot-air that flows out from the bottom of described rotating shaft can strike the bigger diameter end flange of described rotating shaft, and described bigger diameter end flange is expanded prior to the interior installed surface of described bigger diameter end, and the speed of expansion of bigger diameter end flange is greater than the speed of expansion of installed surface in the described bigger diameter end.
Preferably, at least in the bottom surface of the inwall of the bigger diameter end of described rotating shaft, described rotating shaft and the inwall of fore bearing that is positioned at the miner diameter end of described rotating shaft be provided with temperature sensor.
Preferably, in the outer setting of described temperature sensor the radiation proof thermal shroud is arranged, with reduce and hot-air between radiant heat transfer.
Preferably, described heater also comprises the heater between the inwall that is arranged on described water conservancy diversion fluidic device and described housing, with the flow through hot-air of heater of heating.
Preferably, described heater is ring heater.
In addition, the present invention also provides a kind of assembly method that adopts the alternator shaft that above-mentioned heater carries out, and comprises the steps:
A, rear bearing is assembled on the described stator main shaft;
B, fore bearing is assembled in the miner diameter end of described rotating shaft;
C, with described rotating shaft be installed in fore bearing in the miner diameter end of described rotating shaft and lift in the described heater and heat expansion process;
D, after the swell increment of described rotating shaft and described fore bearing meets the demands, with described rotating shaft and described fore bearing hot jacket on stator main shaft and rear bearing.
Preferably, steps A comprises:
A1, with the inner ring of described rear bearing and rolling element hot jacket on described stator main shaft;
A2, outer ring and the retainer of described rear bearing is set in described rear bearing inner ring on.
Preferably, step B comprises:
B1, the first outer ring cold of described fore bearing is loaded in the miner diameter end of described rotating shaft;
B2, the inner ring of described fore bearing and rolling element are packed in the first outer ring of described fore bearing;
B3, the second outer ring cold of described fore bearing is loaded in the miner diameter end of described rotating shaft.
Utilizing heater countershaft provided by the present invention and be arranged on fore bearing in the miner diameter end of described rotating shaft when heating expansion process, at first utilize electric heat source that the air in the rotating shaft is heated; Under the pressure of centrifugal blower drove, heated air entered into the space between rotating shaft and the housing from the bottom of rotating shaft, and upwards mobile rapidly along the spiral inner wall ground of housing, then enters the water conservancy diversion fluidic device; Under the effect of its water conservancy diversion, arrive the top of inner chamber, go out rotatably from described water conservancy diversion fluidic device, and strike the miner diameter end outer wall of described rotating shaft; After jet impingement heat transfer occurs consumingly in hot-air and described miner diameter end, under the pressure suction effect of described centrifugal blower, again enter described rotating shaft inner, and flow downward, again heated by electric heat source, formed thus continuous closed circulation heating system.
Heater provided by the present invention adopts jet current principle; in the collision process of the miner diameter end of hot-air and rotating shaft; strong impact jet flow occurs conducts heat; after this carry out convective heat transfer with the fore bearing that is positioned at miner diameter end again; so that the miner diameter end of rotating shaft can swell prior to fore bearing; and the speed of expansion of miner diameter end is greater than the speed of expansion of fore bearing, thereby removed the expansion constraint of miner diameter end to fore bearing and outer ring, and protection lubricating grease is avoided the direct impact of hot-fluid.
In addition, the assembly method of rotating shaft provided by the present invention is in visual situation, first rear bearing is assembled to the stator main shaft, avoid the retainer of rear bearing and the bump of inner ring, reduced the damage of rear bearing, significantly improved installation accuracy and the useful life of rear bearing; And when described rotating shaft being carried the fore bearing cover and is installing on the stator main shaft, because rotating shaft and fore bearing have been expanded to predetermined amount, can easily assembling will be finished, and avoided the bump between fore bearing and the stator main shaft, improve equally useful life and the installation accuracy of fore bearing, needn't repeatedly install, and then helped to improve efficiency of assembling, reduce assembly cost, and improve the transaction capabilities of wind-driven generator.
Description of drawings
When present invention is described by reference to the accompanying drawings below, above and other advantage and disadvantage of the present invention will become clearer and be easier to and understand, wherein:
Fig. 1 is the structural representation of stator main shaft of the prior art;
Fig. 2 is the view that the inner ring of rear bearing of the prior art is assembled to the stator main shaft;
Fig. 3 is the structural representation of rotating shaft of the prior art;
Fig. 4 is the view that in the prior art outer ring cold of rear bearing is loaded on the bigger diameter end of rotating shaft;
Fig. 5 is the view that in the prior art the first outer ring cold of fore bearing is loaded in the miner diameter end of rotating shaft;
Fig. 6 is with the view of shaft set to the stator main shaft in the prior art;
Fig. 7 be in the prior art with the inner ring hot charging of fore bearing in the view of stator main shaft;
Fig. 8 is the view that in the prior art the second outer ring cold of fore bearing is loaded in the miner diameter end of rotating shaft;
Fig. 9 is the view after rotating shaft of the prior art is assembled to the stator main shaft;
Figure 10 is the structural representation of heater according to an embodiment of the invention;
Figure 11 is the structural representation of the temperature sensor of heater shown in Figure 10;
Figure 12 is the FB(flow block) of rotating shaft assembly method according to an embodiment of the invention;
Figure 13 is the view that rear bearing is assembled to the stator main shaft shown in Figure 12;
Figure 14 is that the first outer ring cold with fore bearing shown in Figure 12 is loaded on the view in the miner diameter end of rotating shaft;
Figure 15 is that the inner ring with fore bearing shown in Figure 12 is assemblied in the view in the miner diameter end of rotating shaft;
Figure 16 is that the state that the second outer ring cold with fore bearing shown in Figure 12 is loaded in the miner diameter end of rotating shaft is not intended to;
Figure 17 is the view after fore bearing shown in Figure 12 is assembled to the miner diameter end of rotating shaft;
Figure 18 is placed into the view that heater heats expansion process with rotating shaft shown in Figure 17 and fore bearing;
Figure 19 is in the view of stator main shaft with the rotating shaft after the heating expansion process shown in Figure 180 and fore bearing hot charging;
Figure 20 is the view after rotating shaft shown in Figure 19 and fore bearing are assembled to the stator main shaft.
Embodiment
Core of the present invention provides a kind of heater, realizes processing is expanded in the heating of alternator shaft and fore bearing.Another core of the present invention provides a kind of assembly method of using the alternator shaft of this heater, finishes efficiently, accurately the assembling of alternator shaft, and improves the useful life of bearing and the performance of wind-driven generator.
In order to make those skilled in the art can better understand the present invention, below by describing the present invention in conjunction with the accompanying drawings and embodiments, wherein, identical label represents same parts all the time.
With reference to Figure 10, Figure 10 is the structural representation of heater according to an embodiment of the invention.
According to one embodiment of present invention, provide a kind of heater, described heater comprises housing 8, centrifugal blower 13, electric heat source 10 and water conservancy diversion fluidic device.
The drive motors 12 of centrifugal blower 13 is arranged on the bottom of housing 8, particularly can be between the steel plate of the bottom of housing 8; Like this, the vertical distance between the horizontal steel plate bottom can increasing to hold drive motors 12, can also arrange a plurality of ribs vertically between horizontal steel plate, to strengthen the intensity of housing 8 bottoms.
Heater can also comprise bracing or strutting arrangement, and bracing or strutting arrangement is arranged in the inner chamber 801, with supporting revolving shaft 2.Certainly, bracing or strutting arrangement can not affect the normal circulation of inner chamber 801 Airs.Bracing or strutting arrangement can be supported at three point part 14 particularly, and strutting piece 14 is arranged on the bottom of inner chamber 801, is circumferentially evenly distributing, and the bigger diameter end flange 203 of rotating shaft 2 directly is placed on the strutting piece 14.
In addition, heater can also comprise stopping means, stopping means is arranged in the inner chamber 801, so that when housing 8 is put in rotating shaft 2, the position of countershaft 2 limits, make rotating shaft 2 approximately be positioned at the middle position of inner chamber 801, and guarantee between the inwall of the outer wall of rotating shaft 2 and housing 8, to exist all the time the space that is used for circulation of air.This stopping means can for example, be distributed in the vertical projection 15 on the strutting piece 14 for being distributed in the restriction protrusion that projects upwards on the bracing or strutting arrangement,, can circumferentially be evenly distributed with three vertical projections 15 that is.
Electric heat source 10 is arranged on the top of centrifugal blower 13, and electric heat source 10 is positioned at the inside of rotating shaft 2, with the air heat of rotating shaft 2 inside of will flowing through.Can offer equably circular hole on the outer wall of electric heat source 10, offer square hole after spaced apart again, aperture and pitch-row can regularly distribute, in order to increase the radiant heat transfer between electric heat source 10 and the air.In addition, the heat pipe in the electric heat source 10 can adopt " M " type heat pipe, can also adopt the fin for increasing heat transfer area.Certainly, electric heat source 10 provided by the present invention is not limited to this, can also adopt far-infrared heating element to substitute above-mentioned electrothermal tube, also can adopt other forms of heat pipe, as long as can realize preheating of air rapidly.Like this, the air in the rotating shaft 2 drives lower bottom outflow from rotating shaft 2 because the pressure of centrifugal blower 13 sucks, and upwards flows rapidly spirally after being heated by electric heat source 10; In the process of hot air rising, with rotating shaft 2 convective heat transfer occurs at least; Hot-air enters into again the inside of rotating shaft 2 again from the top of rotating shaft 2 behind the top that arrives inner chamber 801, again heated by electric heat source 10, forms circulating-heating loop, closed ground.
The water conservancy diversion fluidic device is arranged on the middle and upper part of inner chamber 801, and this water conservancy diversion fluidic device is positioned at miner diameter end 201 outsides of rotating shaft 2 at least.Annular space between the inwall of water conservancy diversion fluidic device and housing 8 is the circulation passage in the uphill process of hot-air, so that hot-air is near the miner diameter end 201 that substantially rises to spirally rotating shaft 2 time, can directly strike miner diameter end 201, form strong impact jet flow heat transfer effect, improve the rate of heat transfer of hot-air and miner diameter end 201, guarantee that miner diameter end 201 expands prior to the fore bearing 20 in the miner diameter end 201, and the speed of expansion of miner diameter end 201 is greater than the speed of expansion of fore bearing 20, then hot-air skims over the inner ring of fore bearing 20 from bottom to up fast, enters the inside of rotating shaft 2.
Specifically, the water conservancy diversion fluidic device can comprise annular baffle 901 and annular jet device 902.Annular baffle 901 is roughly tubular, covers at least middle part (for example, middle flange 204) from rotating shaft 2 to the part of miner diameter end 201, that is, and and between the middle and upper part of the inwall of housing 8 and rotating shaft 2 is divided.Annular baffle 901 bottoms can be arranged on the flange 204, and be arranged in the inboard of the installing hole on the flange 204, to reduce as much as possible the hot-air that enters between annular baffle 901 and the rotating shaft 2, the passage of most hot-airs between the inwall of annular baffle 901 and housing 8 upwards flowed.Annular jet device 902 is positioned at the top of annular baffle 901, and centers on the outside of the miner diameter end 201 of rotating shaft 2, that is, and and between the inwall and miner diameter end 201 of housing 8.Annular jet device 902 is outstanding towards miner diameter end 201, form certain voltage stabilizing space 903 with the inwall of housing 8, in addition, the upper end of annular jet device 902 can be connected to the top of inner chamber 801, and offers a plurality of jets at the sidewall in the face of miner diameter end 201 of annular jet device 902.Like this, accumulation to a certain degree can occur in hot-air after rising to the voltage stabilizing space, and supercharging, and then go out from jet at high speed, and strike the outer wall of miner diameter end 201, and strong impact jet flow occurs between the miner diameter end 201 conduct heat, with promptly with miner diameter end 201 heating; The thereafter heat air continues to flow to the top of rotating shaft 2, under the pressure suction effect of centrifugal blower 13, flow downward, at this moment, convective heat transfer occurs with the front rotary shaft 20 that is installed in miner diameter end 201 inside in hot-air again, thereby realized that miner diameter end 201 can expand prior to front rotary shaft 20, and the speed of expansion of miner diameter end 201 is greater than the speed of expansion of fore bearing 20.
Need to prove, water conservancy diversion fluidic device provided by the present invention is not limited to above-mentioned form, can also adopt the water conservancy diversion fluidic device of other versions, can expand prior to front rotary shaft 20 as long as can guarantee miner diameter end 201, and the speed of expansion of miner diameter end 201 is greater than the speed of expansion of fore bearing 20.For example, can also be at the inside of water conservancy diversion ejector 902 packing material, and offer equably a plurality of injection channels, and the size of injection channel is answered convergent along the flow direction of hot-air, this helps further to improve the speed of hot-air to a certain extent, it is gone out at high speed, and strike miner diameter end 201.
In addition, heater provided by the present invention also comprises heater 16, and this heater 16 is arranged between water conservancy diversion fluidic device and the housing 8, in order to the hot-air that rises is spirally carried out post bake, further improves the temperature difference between hot-air and the rotating shaft 2.
Specifically, heater 16 can be ring heater, is centered around the outside of annular baffle 901.
In addition, for the pressure of steady flow to the hot-air of rotating shaft 2 tops, reduce turbulence intensity, can between the top of the top of rotating shaft 2 and housing 8, form surge chamber 24, this surge chamber 24 is the part of inner chamber 801, and this helps to strengthen the convective heat transfer between hot-air and the fore bearing 20 to a certain extent.Top at inner chamber 801 can also be provided with network 17, to improve the intensity of housing 8, is reduced in the distortion in the lifting upper shell process.And surge chamber 24 can be formed on the middle position of network 17.Like this, hot-air enters surge chamber 24, and after surge chamber 24 voltage stabilizings, again flows back to the inside of rotating shaft 2 after conducting heat with miner diameter end 201.
In the process of countershaft 2 and fore bearing 20 heating, the phenomenon that the lubricating grease in the fore bearing 20 might occur dripping, for this reason, heater provided by the present invention can further comprise oil-collecting device, to receive the lubricating grease of drippage, realizes the recovery of lubricating grease.The top of oil-collecting device is suspended on the top of housing or the top of rotating shaft 2, and the lower end touches the inwall of rotating shaft 2,, can substantially form the box body of opening upwards with the inwall of rotating shaft 2 that is.
Specifically, the top that is suspended on rotating shaft 2 at above-mentioned oil-collecting device is that oil-collecting device can comprise oil drain pan 18 and crossbeam 19.Oil drain pan 18 adopts gradually wealthy version from top to bottom, and crossbeam 19 is arranged on the top of oil drain pan 18.Crossbeam 19 is placed on the top of rotating shaft 2, that is, the length of crossbeam 19 is greater than the diameter on the top of rotating shaft 2; Oil drain pan 18 is suspended on the inside of the miner diameter end 201 of rotating shaft 2, and the lower end of oil drain pan 18 is formed with outside crimping, and contacts with the inwall of rotating shaft 2.
According to another embodiment of the present invention, the shape of the bottom of heater provided by the present invention can be the arc that projects upwards, like this, after going out from the bottom of rotating shaft 2 from the hot-air that is heated by electric heat source 10, under the bump effect of the bottom surface of arc, can strike bigger diameter end 202 and the bigger diameter end flange 203 of rotating shaft 2, make the strong jet impingement heat transfer of generation between hot-air and bigger diameter end 202 and the bigger diameter end flange 203, guarantee that bigger diameter end flange 203 expands prior to the interior installed surface (being used for installing rear bearing) of bigger diameter end 202, and the speed of expansion of bigger diameter end flange 203 is greater than the speed of expansion of the interior installed surface of bigger diameter end 202.
In addition, in heating process, need the temperature of the temperature in the inner chamber 801 and rotating shaft 2 is carried out Real Time Monitoring, can be at least at mounting temperature sensor 25 on the interior installed surface of the bigger diameter end 202 of rotating shaft 2, on the inner surface of the bottom of rotating shaft 202 and fore bearing 20.Should be provided with radiation proof thermal shroud 27 on temperature sensor 25, as shown in figure 11, hot-air can react the temperature on each measurement surface of rotating shaft 2 accurately on the impact of the certainty of measurement of temperature sensor 25 to avoid as much as possible on every side.Also should do high temperature resistant to the lead-in wire 26 of temperature sensor 25 simultaneously and the radiation proof protection.
Utilizing heater countershaft provided by the present invention 2 and be installed in fore bearing 20 in the miner diameter end 201 of rotating shaft 2 when heating, at first rotating shaft 2 is hung on the lower house of housing 8, again upper shell is lifted on the lower house, form the inner chamber 801 that seals; Utilization is positioned at the electric heat source 10 of rotating shaft 2 inside with the air heat of rotating shaft 2 inside; Under the pressure driving effect of centrifugal blower 13, heated air is gone out through the bottom of rotating shaft 2 from the inside of rotating shaft 2; Under the bump effect of the bottom surface of arc, heating bigger diameter end flange 203 and bigger diameter end 202; Hot-air rises rapidly more spirally, through the circular passage between annular baffle 901 and the housing 8, reaches in the annular jet device, and goes out from annular jet device high speed ground, and cardinal principle flatly strikes on the miner diameter end 201 of rotating shaft 2, heats miner diameter end 201; The thereafter heat air travels up in the surge chamber 24, again flow into the inside of rotating shaft 2 after the voltage stabilizing from surge chamber 24, with fore bearing 20 convective heat transfer occurs in the process that flows downward, with fore bearing 20 heating; Heated by electric heat source 10 again at last.
The various piece of rotating shaft 2 be heated be expanded to the degree that meets the demands after, heating-stopping apparatus, again with rotating shaft 2 and fore bearing 20 hot jackets to the stator main shaft, finish turning of countershaft 2 and join.
With reference to Figure 12 to Figure 20, according to another embodiment of the present invention, the present invention also provides a kind of assembly method that adopts the alternator shaft that above-mentioned heater carries out, and described assembly method comprises the steps:
(S1), rear bearing 23 is assembled on the stator main shaft 1.
Specifically, step (S1) can comprise:
(S1-1) with the inner ring 3 of rear bearing 23 and rolling element hot jacket on stator main shaft 1;
Can adopt induction heater or hot air that inner ring 3 and rolling element are heated, make inner ring 3 and rolling element be expanded to the size that meets the demands.
(S1-2) on the inner ring 3 that outer ring 4 and the retainer of rear bearing 23 is set in rear bearing 23.
Can be before suit, in the outer ring 4 and retainer smear lubricating grease.
(S2), fore bearing 20 is assembled in the miner diameter end 201 of rotating shaft 2.
Specifically, when fore bearing 20 was double-row conical bearing, step (S2) can comprise:
(S2-1), with the first outer ring 5 cold charges of fore bearing 20 in the miner diameter end 201 of rotating shaft 2; Can adopt cooling cabinet that cooling processing is carried out in the first outer ring 5.
(S2-2), the inner ring 6 of fore bearing 20 and rolling element are packed in the first outer ring 5 of fore bearing 20;
Before assembling inner ring 6, can in inner ring 6 and rolling element, apply lubricating grease, the wearing and tearing during with 20 operation of reduction fore bearing.
(S2-3), with the second outer ring 7 cold charges of fore bearing 20 in the miner diameter end 201 of rotating shaft 2.
Can adopt cooling cabinet that cooling processing is carried out in the second outer ring 7, after reaching predetermined amount of contraction, attach it in the miner diameter end 201, itself and inner ring 6 are cooperatively interacted, finally finish the assembling of fore bearing 20.
In addition, pack in the miner diameter end 201 together in the retainer of fore bearing 20 and outer ring.
(S3), rotating shaft 2 and fore bearing 20 liftings are entered in the heater to heat expansion process.
In hanging in process, at first the upper shell of heater to be removed, again rotating shaft 2 is hung in, then upper shell is lifted on the lower house, rotating shaft 2 is sealed in carries out heat treated in the inner chamber 801.
(S4), after the swell increment of rotating shaft 2 and fore bearing 20 satisfies the requirement of interference fit, with the rotating shaft 2 after expanding and fore bearing 20 hot jackets on stator main shaft 1 and rear bearing 23.
When assembling, can guide 22 be set on the top of stator main shaft 1, lead with the installation of countershaft 2, be equivalent to prolong the length of stator main shaft 1.When rotating shaft 2 was coupled to stator main shaft 1 fully, at this moment, the rear bearing 23 that is installed in advance on the stator main shaft 1 was mounted in the bigger diameter end of rotating shaft 2, guide 22 was disassembled to get final product again.
Heater provided by the present invention adopts jet current principle, in the collision process of the miner diameter end 201 of hot-air and rotating shaft 2, strong impact jet flow heat transfer occurs, so that the miner diameter end 201 of rotating shaft 2 swells prior to fore bearing 20; And the speed of expansion of miner diameter end 2 is greater than the speed of expansion of fore bearing 20, thereby has removed the expansion constraint of the outer ring of fore bearing 20, and protection lubricating grease is avoided the direct impact of hot-fluid.
In addition, the assembly method of rotating shaft provided by the present invention, in visual situation, first rear bearing 23 is assembled to stator main shaft 1, the retainer of rear bearing and the bump of inner ring have been avoided, and the inner ring 3 of rear bearing 23 and the assembly precision of outer ring 4, the useful life of having improved efficiency of assembling and rear bearing 23 have been guaranteed; And when installing to rotating shaft 2 carrier's fore bearings 20 covers on the stator main shaft 1, because fore bearing 20 and rotating shaft 2 have been expanded to the amount that satisfies matching requirements, can easily finish assembling, the phenomenons such as collision between the inner ring 6 of fore bearing 20 and outer ring, the retainer have significantly been reduced, also need not to carry out many these suits, significantly improve assembly precision and efficient, reduced assembly cost, and helped to improve the useful life of fore bearing 20 and the performance of wind-driven generator.
The above is to heater provided by the present invention and use the assembly method of the alternator shaft of this heater to describe in detail; although represented and described some embodiments of the present invention; but those skilled in the art should understand that; in the situation that does not break away from the principle of the present invention that limited its scope by claim and equivalent thereof and spirit; can make amendment and perfect to these embodiment these modifications and improve also should be in protection scope of the present invention.
Claims (20)
1. a heater is used for the heating alternator shaft, and described rotating shaft comprises miner diameter end and bigger diameter end, it is characterized in that, comprising:
Housing has inner chamber, and rotating shaft to be heated is placed in the described inner chamber, and the miner diameter end of described rotating shaft is placed up, and in the miner diameter end fore bearing is installed;
Drive motors is arranged on the bottom of housing;
Centrifugal blower is arranged on the below of rotating shaft, drives and be connected to the drive motors top by drive motors;
Electric heat source is arranged on the top of described centrifugal blower, and it is inner to be positioned at described rotating shaft;
The water conservancy diversion fluidic device, be arranged on the middle and upper part of described cavity, form the rising passway of hot-air with the inwall of described housing, so that heated air is after the bottom outflow of described rotating shaft, inwall along described housing rises, and goes out in described water conservancy diversion fluidic device, directly strikes the miner diameter end of described rotating shaft, so that the miner diameter end of described rotating shaft expands prior to described fore bearing, and the speed of expansion of miner diameter end is greater than the speed of expansion of described fore bearing.
2. heater according to claim 1 is characterized in that, described housing comprises inside and outside at least two-layered steel plates, is filled with insulation material between described steel plate.
3. heater according to claim 2 is characterized in that, the drive motors of described centrifugal blower is at least between the two-layered steel plates of bottom of described housing.
4. heater according to claim 1 is characterized in that, described heater also comprises bracing or strutting arrangement, and described rotating shaft is placed on the described bracing or strutting arrangement.
5. heater according to claim 4 is characterized in that, described bracing or strutting arrangement comprises the supported at three point part of the bottom that is arranged on described housing.
6. heater according to claim 4 is characterized in that, described heater also comprises stopping means, limits with the relative position to described rotating shaft and described housing.
7. heater according to claim 6 is characterized in that, described stopping means comprises the restriction protrusion that is arranged on described bracing or strutting arrangement top and projects upwards.
8. heater according to claim 1 is characterized in that, forms surge chamber between the top of the top of described rotating shaft and described housing.
9. heater according to claim 8 is characterized in that, is provided with network at the top of described inner chamber, and described surge chamber is positioned at the middle position of described network.
10. according to claim 1 to the described heater of 9 any one, it is characterized in that, described water conservancy diversion fluidic device comprises:
Annular baffle, described annular baffle cover at least from the middle part of described rotating shaft to the part of miner diameter end, form described rising passway with the inwall with described housing; And
The annular jet device, described annular jet device is on described annular baffle, and be centered around the periphery of the miner diameter end of described rotating shaft, and outstanding towards the miner diameter end of described rotating shaft, form the voltage stabilizing space with the inwall with described housing, offering a plurality of jets in the face of the sidewall of miner diameter end, so that hot-air is from described jet ejection and strike miner diameter end.
11. according to claim 1 to the described heater of 9 any one, it is characterized in that, described heater also comprises oil-collecting device, to reclaim bearing grease, the top of described oil-collecting device is suspended on the top of described housing or the top of described rotating shaft, and the lower end touches the inwall of described rotating shaft.
12. heater according to claim 11, it is characterized in that, described oil-collecting device comprises from top to bottom gradually wealthy oil drain pan and is arranged on the crossbeam on the top of described oil drain pan, when the top of described oil-collecting device is suspended on the top of described rotating shaft, described crossbeam is along on the end face that radially is placed on described rotating shaft of described rotating shaft, described oil drain pan is suspended on by described crossbeam in the miner diameter end of described rotating shaft, and described oil drain pan feather edge contacts with the inwall of miner diameter end.
13. according to claim 1 to the described heater of 9 any one, it is characterized in that, described rotating shaft comprises the bigger diameter end flange that is formed on the bigger diameter end place, the edge of the bottom surface of described inner chamber forms upwardly extending arc, so that the hot-air that flows out from the bottom of described rotating shaft can strike the bigger diameter end flange of described rotating shaft, and described bigger diameter end flange is expanded prior to the interior installed surface of described bigger diameter end, and the speed of expansion of bigger diameter end flange is greater than the speed of expansion of installed surface in the described bigger diameter end.
14. to the described heater of 9 any one, it is characterized in that according to claim 1, at least in the bottom surface of the inwall of the bigger diameter end of described rotating shaft, described rotating shaft and the inwall of fore bearing that is positioned at the miner diameter end of described rotating shaft be provided with temperature sensor.
15. heater according to claim 14 is characterized in that, in the outer setting of described temperature sensor thermal shroud is arranged, to reduce the radiant heat transfer between temperature sensor and the hot-air.
16. to the described heater of 9 any one, it is characterized in that according to claim 1, described heater also comprises the heater between the inwall that is arranged on described water conservancy diversion fluidic device and described housing, with the flow through hot-air of heater of heating.
17. heater according to claim 16 is characterized in that, described heater is ring heater.
18. the assembly method of the alternator shaft that an employing such as the described heater of claim 1 to 17 any one carry out is characterized in that, comprises the steps:
A, rear bearing is assembled on the stator main shaft;
B, fore bearing is assembled in the miner diameter end of described rotating shaft;
C, with described rotating shaft be installed in fore bearing in the miner diameter end of described rotating shaft and lift in the described heater and heat expansion process;
D, after the swell increment of described rotating shaft and described fore bearing meets the demands, with described rotating shaft and described fore bearing hot jacket on stator main shaft and rear bearing.
19. assembly method according to claim 18 is characterized in that, steps A comprises:
A1, with the inner ring of described rear bearing and rolling element hot jacket on described stator main shaft;
A2, outer ring and the retainer of described rear bearing is set in described rear bearing inner ring on.
20. assembly method according to claim 18 is characterized in that, when described fore bearing was double-row conical bearing, step B comprised:
B1, the first outer ring cold of described fore bearing is loaded in the miner diameter end of described rotating shaft;
B2, the inner ring of described fore bearing and rolling element are packed in the first outer ring of described fore bearing;
B3, the second outer ring cold of described fore bearing is loaded in the miner diameter end of described rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210593278.5A CN103078454B (en) | 2012-12-31 | 2012-12-31 | Heating device and method for assembling rotating shaft of generator by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210593278.5A CN103078454B (en) | 2012-12-31 | 2012-12-31 | Heating device and method for assembling rotating shaft of generator by using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103078454A true CN103078454A (en) | 2013-05-01 |
| CN103078454B CN103078454B (en) | 2015-04-15 |
Family
ID=48154892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210593278.5A Active CN103078454B (en) | 2012-12-31 | 2012-12-31 | Heating device and method for assembling rotating shaft of generator by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103078454B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410216A (en) * | 2014-12-02 | 2015-03-11 | 哈尔滨电机厂有限责任公司 | General assembling method for heavy type integrated transportation power generator in factory |
| CN106300816A (en) * | 2015-05-18 | 2017-01-04 | 中核核电运行管理有限公司 | Flywheel heater is used in main pump motor maintenance |
| CN112806862A (en) * | 2021-02-07 | 2021-05-18 | 珠海格力新材料有限公司 | Hot air fryer basket and hot air fryer |
| CN113489267A (en) * | 2021-06-30 | 2021-10-08 | 哈尔滨电气动力装备有限公司 | Large synchronous motor rotor axial thrust mounting process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5441242A (en) * | 1992-12-04 | 1995-08-15 | Ebner Industrieofenbau Gesellschaft M.B.H. | Apparatus for contacting surfaces of workpieces with a flowing gas |
| JP2007082342A (en) * | 2005-09-15 | 2007-03-29 | Honda Motor Co Ltd | Method for manufacturing motor |
| CN201774430U (en) * | 2010-07-29 | 2011-03-23 | 中山大洋电机制造有限公司 | Novel motor mechanism |
| CN201918851U (en) * | 2010-12-25 | 2011-08-03 | 常州市神力电机有限公司 | Shaft penetrating tooling and shaft penetrating hydraulic machine for iron core of wind power motor stator |
| CN201971859U (en) * | 2010-12-27 | 2011-09-14 | 苏州新长光热能科技有限公司 | Efficient air circulation flow guiding device applicable to thermal treatment furnaces |
-
2012
- 2012-12-31 CN CN201210593278.5A patent/CN103078454B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5441242A (en) * | 1992-12-04 | 1995-08-15 | Ebner Industrieofenbau Gesellschaft M.B.H. | Apparatus for contacting surfaces of workpieces with a flowing gas |
| JP2007082342A (en) * | 2005-09-15 | 2007-03-29 | Honda Motor Co Ltd | Method for manufacturing motor |
| CN201774430U (en) * | 2010-07-29 | 2011-03-23 | 中山大洋电机制造有限公司 | Novel motor mechanism |
| CN201918851U (en) * | 2010-12-25 | 2011-08-03 | 常州市神力电机有限公司 | Shaft penetrating tooling and shaft penetrating hydraulic machine for iron core of wind power motor stator |
| CN201971859U (en) * | 2010-12-27 | 2011-09-14 | 苏州新长光热能科技有限公司 | Efficient air circulation flow guiding device applicable to thermal treatment furnaces |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410216A (en) * | 2014-12-02 | 2015-03-11 | 哈尔滨电机厂有限责任公司 | General assembling method for heavy type integrated transportation power generator in factory |
| CN106300816A (en) * | 2015-05-18 | 2017-01-04 | 中核核电运行管理有限公司 | Flywheel heater is used in main pump motor maintenance |
| CN112806862A (en) * | 2021-02-07 | 2021-05-18 | 珠海格力新材料有限公司 | Hot air fryer basket and hot air fryer |
| CN113489267A (en) * | 2021-06-30 | 2021-10-08 | 哈尔滨电气动力装备有限公司 | Large synchronous motor rotor axial thrust mounting process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103078454B (en) | 2015-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103078454A (en) | Heating device and method for assembling rotating shaft of generator by using same | |
| TWI653390B (en) | Wind power installation | |
| CN202050305U (en) | Rotary motor and wind generating system | |
| CN106282527B (en) | A kind of heating furnace for annular element heating | |
| CN205559169U (en) | Wind -driven generator and wind -driven generator set | |
| CN102769362A (en) | Large-power three-phase asynchronous motor with built-in cooler | |
| CN102969835A (en) | Main cooling agent pump motor of second-generation nuclear power plant | |
| CN102790473A (en) | Disc-type permanent magnet motor with sealed cooling structure | |
| CN102148550A (en) | Radiating structure for vertical shaft-disc-type outer rotor motor | |
| CN107911889A (en) | Heating device, heating method and shafting assembly method | |
| CN110094313A (en) | The base bearing cooling system and wind power generating set of wind power generating set | |
| CN107005106A (en) | The cooling of the axial end regions of the stator of electric rotating machine | |
| CN202949323U (en) | Main coolant pump motor for second-generation nuclear power station | |
| WO2021042848A1 (en) | Wind turbine closed cooling structure | |
| CN101267141A (en) | Vertical water wheel power generator no fan ventilation cooling device | |
| CN202937502U (en) | High-air-volume axial-flow type fan | |
| CN201956808U (en) | Semi-direct drive wind generator with two end covers and water jacket cooling structure | |
| CN110214407B (en) | Method for cooling a rotor of a generator | |
| CN207819674U (en) | A kind of autonomous cooling motor | |
| CN216038667U (en) | Graphitization furnace for high-purity graphite | |
| CN109234503A (en) | A kind of quenching unit for barrel-shaped workpiece | |
| CN206471990U (en) | One kind radiating high efficiency motor | |
| CN102013752A (en) | Engine base with novel cooling jacket | |
| CN106533037A (en) | Doubly-fed wind power generator | |
| CN105990944A (en) | Wind path structure of air-cooling steam turbine generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |