CN103769797A - Main bearing step-type heating method of novel megawatt wind turbine generator - Google Patents
Main bearing step-type heating method of novel megawatt wind turbine generator Download PDFInfo
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- CN103769797A CN103769797A CN201310526828.6A CN201310526828A CN103769797A CN 103769797 A CN103769797 A CN 103769797A CN 201310526828 A CN201310526828 A CN 201310526828A CN 103769797 A CN103769797 A CN 103769797A
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- base bearing
- temperature
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- inner ring
- heated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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Abstract
The invention discloses a main bearing step-type heating method of a novel megawatt wind turbine generator. According to the main bearing step-type heating method, the allowed heating temperature of a main bearing each time is determined according to materials of the main bearing, the diameter of an inner ring and the diameter of an outer ring, the main bearing is heated in a step-type mode, a temperature difference between the inner ring and the outer ring of the main bearing is reasonably controlled, it is guaranteed that a difference value of the swelling amount of the inner ring and the swelling amount of the outer ring is smaller than a backlash of the main bearing, the main bearing is located in the positive backlash state all the time in the heating process, and it is guaranteed that a roller of the main bearing is located in the movable state all the time in the heating process.
Description
Technical field
The present invention relates to a kind of novel megawatt-level wind set main shaft and hold staged heating means.
Background technology
It is wind-powered electricity generation unit center heart parts that megawatt-level wind set main shaft holds, and its endoporus and spindle design are interference fit.In installation process, generally all by base bearing heating, it is expanded, after can coordinating with shaft clearance, just install.Conventional base bearing mode of heating has fluid heating, heating furnace heating and eddy-current heating; Wherein, fluid heating and heating furnace heating operation complexity, firing rate be slow, it is high that site environment is required, and is applicable to the little bearing heating of closed environment; And that megawatt-level wind set main shaft holds size is bigger than normal, and general complete system plant is all without independent heating clamber, so the best way uses induction heater to carry out eddy-current heating exactly.But simultaneously, based on induction heater principle of induction, during for inside and outside circle integrated main bearing heating, will certainly cause the inside and outside circle excessive temperature differentials of base bearing, for example, actual measurement capacity is that the inside and outside circle temperature difference of 100KVA induction heater can reach 100 ℃, so just causes base bearing inner ring swell increment to be greater than outer ring, and base bearing play becomes negative, base bearing roller is caused to bad extruding, affect the overall result of use of base bearing.
Summary of the invention
The object of invention is exactly in order to address the above problem, provide a kind of novel megawatt-level wind set main shaft to hold staged heating means, the method is by calculating, determine each heating-up temperature allowing, rationally control the temperature difference of the inside and outside circle of base bearing, guarantee that inside and outside circle swell increment difference is less than base bearing play, make base bearing in heating process always in positive play state, guarantee base bearing roller in heating process the moment in active state.
To achieve these goals, the present invention adopts following technical scheme:
A kind of novel megawatt-level wind set main shaft holds staged heating means, comprises the following steps:
(1) enter factory's data according to base bearing and determine base bearing play numerical value △ to be heated
bearing;
(2) measure, calculate: measure the inside and outside footpath of base bearing, determine the actual fit tolerance △ T=d-D of bearing and main shaft;
Wherein, d is base bearing internal diameter, and D is main shaft external diameter, and unit is mm;
(3) according to GB/T19568-2004 " wind power generating set assembling and installation specification " calculating base bearing and main shaft, required minimum clearance L is installed:
L=（0.001～0.0015）×d （1）
Wherein, d is base bearing internal diameter, and unit is mm;
(4) calculate the swell increment that base bearing inner ring needs: calculate according to L and △ T the swell increment △ L=L-△ T that bearing inner race needs;
(5) calculate base bearing inner ring swell increment: determine base bearing inner ring diameter to be heated, material, and calculate base bearing inner ring and add thermal expansion amount formula, heating expansion formula is as follows:
△=a×d×（T－t） （2）
Wherein, △ is swell increment, and unit is mm; A is linear expansion coefficient, and unit is 10
-6/ ℃; T is the target temperature that needs heating, and unit is ℃; T is environment temperature, the observed temperature of environment while heating, and unit is ℃;
(6) calculate the final temperature that base bearing inner ring heats: the swell increment △ L substitution formula (2) that base bearing inner ring is needed, calculates final temperature T1=△ L ÷ (a*d)+t that base bearing inner ring need be heated to;
(7) calculate base bearing inner ring and allow the maximum temperature heating at every turn: by base bearing play △
bearingsubstitution formula (2), calculates base bearing inner ring and allows the rising temperature T 2=△ heating at every turn
bearing÷ (a*d), determines each actual rising temperature T 3=T2-15 ℃ heating then;
(8) monitoring base bearing inner ring temperature, employing staged heating: first select heating-up temperature T3+t, be heated to start insulation after design temperature, measure Internal and external cycle temperature, until Internal and external cycle temperature difference is in 5 ℃ time, again start firing equipment and be heated to 2T3+t, be heated to insulation again after temperature, until Internal and external cycle temperature in 5 ℃ time, again starts firing equipment and is heated to 3T3+t, order successively, until reach the final heating-up temperature T1 of base bearing; (during as (T1-t)/T3=n, need to heat n time; As n < (T1-t)/T3 < n+1, heat n+1 time; N is natural number);
(9) start assembling after having heated.
In described step (6), T1 need be less than 120 ℃.
In described step (8), needing the number of times of heating is N, and n is natural number, in the time of (T1-t)/T3=n, and N=n; In the time of n < (T1-t)/T3 < n+1, N=n+1.
Operation principle of the present invention is: according to adding the own condition of heat request and base bearing, divide ladder to heat bearing, guarantee that each heating base bearing swell increment is all less than the play that dispatches from the factory, and makes not pushed by external force in base bearing roller heating process, and finally meets installation requirement.
Beneficial effect of the present invention is:
1, divide ladder to heat base bearing, guarantee that each heating base bearing swell increment is all less than the play that dispatches from the factory;
2, guarantee not pushed by external force in base bearing roller heating process, the moment is in active state.
The specific embodiment:
Below in conjunction with embodiment, the invention will be further described.
A kind of novel megawatt-level wind set main shaft holds staged heating means, comprises the following steps:
(1) enter factory's data according to base bearing and determine base bearing play numerical value △ to be heated
bearing;
(2) measure, calculate: measure the inside and outside footpath of base bearing, determine the actual fit tolerance △ T=d-D of bearing and main shaft;
Wherein, d is base bearing internal diameter, and D is main shaft external diameter, and unit is mm;
(3) according to GB/T19568-2004 " wind power generating set assembling and installation specification " calculating base bearing and main shaft, required minimum clearance L is installed:
L=（0.001～0.0015）×d （1）
Wherein, d is base bearing internal diameter, and unit is mm;
(4) calculate the swell increment that base bearing inner ring needs: calculate according to L and △ T the swell increment △ L=L-△ T that bearing inner race needs;
(5) calculate base bearing inner ring swell increment: determine base bearing inner ring diameter to be heated, material, and calculate base bearing inner ring and add thermal expansion amount formula, heating expansion formula is as follows:
△=a×d×（T－t） （2）
Wherein, △ is swell increment, and unit is mm; A is linear expansion coefficient, and unit is 10
-6/ ℃; T is the target temperature that needs heating, and unit is ℃; T is environment temperature, the observed temperature of environment while heating, and unit is ℃;
(6) calculate the final temperature that base bearing inner ring heats: the swell increment △ L substitution formula (2) that base bearing inner ring is needed, calculates final temperature T1=△ L ÷ (a*d)+t that base bearing inner ring need be heated to;
(7) calculate base bearing inner ring and allow the maximum temperature heating at every turn: by base bearing play △
bearingsubstitution formula (2), calculates base bearing inner ring and allows the rising temperature T 2=△ heating at every turn
bearing÷ (a*d), determines each actual rising temperature T 3=T2-15 ℃ heating then;
(8) monitoring base bearing inner ring temperature, employing staged heating: first select heating-up temperature T3+t, be heated to start insulation after design temperature, measure Internal and external cycle temperature, until Internal and external cycle temperature difference is in 5 ℃ time, again start firing equipment and be heated to 2T3+t, be heated to insulation again after temperature, until Internal and external cycle temperature in 5 ℃ time, again starts firing equipment and is heated to 3T3+t, order successively, until reach the final heating-up temperature T1 of base bearing; (during as (T1-t)/T3=n, need to heat n time; As n < (T1-t)/T3 < n+1, heat n+1 time; N is natural number);
(9) start assembling after having heated.
In step (6), T1 need be less than 120 ℃.
In step (8), needing the number of times of heating is N, and n is natural number, in the time of (T1-t)/T3=n, and N=n; In the time of n < (T1-t)/T3 < n+1, N=n+1.
For example, main shaft installation bearing position dimension is D=Φ 600+0.1mm; Base bearing inner diameter d=Φ 600-0.1mm, base bearing D outer diameter 1=Φ 780-0.2mm, base bearing play numerical value △
bearing=0.3mm, base bearing linear expansion coefficient a=11 × 10
-6/ ℃; When heating, survey environment temperature t=20 ℃.
According to above-mentioned steps, be calculated as follows:
(1) base bearing play numerical value △
bearing=0.3mm;
(2) the actual fit tolerance △ T=d-D=-0.2mm of base bearing and main shaft;
(3) base bearing and main shaft are installed required minimum clearance L=(0.001～0.0015) × d=0.6～0.9; Get L=0.6mm herein;
(4) calculate swell increment △ L=L-△ T=0.6-(0.2)=0.8mm that base bearing inner ring needs;
(5) calculate final temperature T1=△ L ÷ (a*d)+t=0.8 ÷ (11 × 10 that base bearing inner ring heats
-6* 600)+20=141 ℃, because T1 need be less than 120 ℃, gets T1=118 ℃ herein;
(6) calculate base bearing inner ring and allow the rising temperature T 2=△ heating at every turn
bearing÷ (a*d)=0.3 ÷ (11 × 10
-6* 600)=45.5 ℃, then determine each actual heating rising temperature T 3=T2-15=30 ℃;
(7) monitoring base bearing inner ring temperature, adopts staged heating:
Due to (T1-t)/T3=92/30=3.1, so need heating 4 times.First select 50 ℃ of heating-up temperatures, be heated to start insulation after design temperature, measure Internal and external cycle temperature, until Internal and external cycle temperature difference is in 5 ℃ time, again start firing equipment and be heated to 80 ℃, be heated to insulation again after temperature, until Internal and external cycle temperature in 5 ℃ time, again starts firing equipment and is heated to 110 ℃, be heated to start insulation after design temperature, measure Internal and external cycle temperature, until Internal and external cycle temperature difference in 5 ℃ time, again starts firing equipment and is heated to 118 ℃.
(8) start assembling after having heated.
Above-mentioned the specific embodiment of the present invention is described; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (3)
1. novel megawatt-level wind set main shaft holds staged heating means, it is characterized in that: comprise the following steps:
(1) enter factory's data according to base bearing and determine base bearing play numerical value △ to be heated
bearing;
(2) measure, calculate: measure the inside and outside footpath of base bearing, determine the actual fit tolerance △ T=d-D of bearing and main shaft;
Wherein, d is base bearing internal diameter, and D is main shaft external diameter, and unit is mm;
(3) according to GB/T19568-2004 " wind power generating set assembling and installation specification " calculating base bearing and main shaft, required minimum clearance L is installed:
L=（0.001～0.0015）×d （1）
Wherein, d is base bearing internal diameter, and unit is mm;
(4) calculate the swell increment that base bearing inner ring needs: calculate according to L and △ T the swell increment △ L=L-△ T that bearing inner race needs;
(5) calculate base bearing inner ring swell increment: determine base bearing inner ring diameter to be heated, material, and calculate base bearing inner ring and add thermal expansion amount formula, heating expansion formula is as follows:
△=a×d×（T－t） （2）
Wherein, △ is swell increment, and unit is mm; A is linear expansion coefficient, and unit is 10
-6/ ℃; T is the target temperature that needs heating, and unit is ℃; T is environment temperature, the observed temperature of environment while heating, and unit is ℃;
(6) calculate the final temperature that base bearing inner ring heats: the swell increment △ L substitution formula (2) that base bearing inner ring is needed, calculates final temperature T1=△ L ÷ (a*d)+t that base bearing inner ring need be heated to;
(7) calculate base bearing inner ring and allow the maximum temperature heating at every turn: by base bearing play △
bearingsubstitution formula (2), calculates base bearing inner ring and allows the rising temperature T 2=△ heating at every turn
bearing÷ (a*d), determines each actual rising temperature T 3=T2-15 ℃ heating then;
(8) monitoring base bearing inner ring temperature, employing staged heating: first select heating-up temperature T3+t, be heated to start insulation after design temperature, measure Internal and external cycle temperature, until Internal and external cycle temperature difference is in 5 ℃ time, again start firing equipment and be heated to 2T3+t, be heated to insulation again after temperature, until Internal and external cycle temperature in 5 ℃ time, again starts firing equipment and is heated to 3T3+t, order successively, until reach the final heating-up temperature T1 of base bearing; (during as (T1-t)/T3=n, need to heat n time; As n < (T1-t)/T3 < n+1, heat n+1 time; N is natural number);
(9) start assembling after having heated.
2. the novel megawatt-level wind set main shaft of one as claimed in claim 1 holds staged heating means, it is characterized in that: in described step (6), T1 need be less than 120 ℃.
3. the novel megawatt-level wind set main shaft of one as claimed in claim 1 holds staged heating means, it is characterized in that: in described step (8), needing the number of times of heating is N, and n is natural number, in the time of (T1-t)/T3=n, and N=n; In the time of n < (T1-t)/T3 < n+1, N=n+1.
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| CN201310526828.6A CN103769797B (en) | 2013-10-30 | 2013-10-30 | A kind of megawatt wind turbine generator main shaft holds staged heating means |
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|---|---|---|---|
| CN201310526828.6A CN103769797B (en) | 2013-10-30 | 2013-10-30 | A kind of megawatt wind turbine generator main shaft holds staged heating means |
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| CN103769797A true CN103769797A (en) | 2014-05-07 |
| CN103769797B CN103769797B (en) | 2016-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436038A (en) * | 2016-05-25 | 2017-12-05 | 新疆金风科技股份有限公司 | A kind of method for heating and controlling and heating control system for annular element |
| CN109676432A (en) * | 2018-12-21 | 2019-04-26 | 珠海格力智能装备有限公司 | The thermostatically controlled method, apparatus of main shaft and process equipment |
| CN114231726A (en) * | 2021-12-23 | 2022-03-25 | 重庆交通大学 | Heat treatment method for bearing ring of automobile transfer case bearing |
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| US1930277A (en) * | 1931-03-30 | 1933-10-10 | Gen Motors Corp | Process for making clutch throwout bearing |
| JPS60141401A (en) * | 1983-12-26 | 1985-07-26 | Toshiba Corp | Shrink fitting processing device for turbine rotor |
| CN1062443A (en) * | 1990-12-10 | 1992-07-01 | 查理斯·芬尼 | The heating of bearing one class object |
| CN101920431A (en) * | 2010-09-28 | 2010-12-22 | 中冶建工有限公司 | Method and device for hot assembling large-diameter bearing |
| CN103273258A (en) * | 2013-05-24 | 2013-09-04 | 广东明阳风电产业集团有限公司 | Assembling method for gear box end cover and elastic pin shaft |
-
2013
- 2013-10-30 CN CN201310526828.6A patent/CN103769797B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1930277A (en) * | 1931-03-30 | 1933-10-10 | Gen Motors Corp | Process for making clutch throwout bearing |
| JPS60141401A (en) * | 1983-12-26 | 1985-07-26 | Toshiba Corp | Shrink fitting processing device for turbine rotor |
| CN1062443A (en) * | 1990-12-10 | 1992-07-01 | 查理斯·芬尼 | The heating of bearing one class object |
| CN101920431A (en) * | 2010-09-28 | 2010-12-22 | 中冶建工有限公司 | Method and device for hot assembling large-diameter bearing |
| CN103273258A (en) * | 2013-05-24 | 2013-09-04 | 广东明阳风电产业集团有限公司 | Assembling method for gear box end cover and elastic pin shaft |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436038A (en) * | 2016-05-25 | 2017-12-05 | 新疆金风科技股份有限公司 | A kind of method for heating and controlling and heating control system for annular element |
| CN107436038B (en) * | 2016-05-25 | 2019-12-13 | 新疆金风科技股份有限公司 | Heating control method and heating control system for annular part |
| CN109676432A (en) * | 2018-12-21 | 2019-04-26 | 珠海格力智能装备有限公司 | The thermostatically controlled method, apparatus of main shaft and process equipment |
| CN114231726A (en) * | 2021-12-23 | 2022-03-25 | 重庆交通大学 | Heat treatment method for bearing ring of automobile transfer case bearing |
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| Publication number | Publication date |
|---|---|
| CN103769797B (en) | 2016-04-06 |
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