CN109194068B - Generator stator center adjusting device and method - Google Patents
Generator stator center adjusting device and method Download PDFInfo
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- CN109194068B CN109194068B CN201811223611.7A CN201811223611A CN109194068B CN 109194068 B CN109194068 B CN 109194068B CN 201811223611 A CN201811223611 A CN 201811223611A CN 109194068 B CN109194068 B CN 109194068B
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- 230000003247 decreasing effect Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract description 11
- 238000011900 installation process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
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- Manufacture Of Motors, Generators (AREA)
Abstract
A device and a method for adjusting the center of a generator stator belong to the technical field of generator equipment installation tools and installation methods and are used for adjusting the center position of the generator stator. The technical proposal is as follows: the two sides of the stator platen are respectively and fixedly connected with a stator center adjusting plate, adjusting bolts penetrate through screw holes of the stator center adjusting plate to respectively and oppositely face the two sides of the stator, and the stator is transversely moved by rotating the adjusting bolts through the cooperation of a feeler gauge so as to achieve the purpose of adjusting the center position of the stator; and meanwhile, the gap between the stator and the rotor is detected through the air gap measuring block, and then the gap between the stator and the rotor is adjusted through the stator center adjusting plate and the adjusting bolt, so that the average value of the air gap is within 10%. The invention has simple manufacture, convenient operation, no limitation of conditions and strong universality, solves the problems of small adjustment quantity of the center of the stator of the steam turbine generator and difficult control of the force in the equipment installation process, avoids the damage of the stator of the generator, saves the installation and maintenance time and greatly reduces the labor intensity of workers.
Description
Technical Field
The invention relates to a device and a method for adjusting the center positions of stators of a steam turbine generator unit and a TRT generator unit, and belongs to the technical field of generator equipment installation tools and installation methods.
Background
The adjustment of the central position of the stator of the generator should make the generator coincide with the magnetic center of the rotor in the full load thermal state, and the stator should be offset towards the exciter side relative to the magnetic center of the rotor to reserve value, and when the axial position of the rotor of the generator is not displaced by the expansion of the turbine rotor, c=0 (C: full load operation is the maximum absolute displacement value of the turbine rotor at the coupling of the generator, mm). The air gap between the stator and the rotor of the generator should be uniform, and the difference between the measured value and the average value of the air gap with the same section should be generally within 10% of the average value of the air gap, and should not exceed 1mm at maximum. In the past process of adjusting the center of a generator stator, a large hammer knocking method is often adopted to adjust the horizontal displacement of the generator, and as the adjusting amount of the center position of the generator stator is quite tiny, the adjusting method is time-consuming and labor-consuming, the knocking force of the large hammer is not easy to control, and the generator stator is damaged to a certain extent after multiple times of knocking.
Disclosure of Invention
The invention aims to solve the technical problem of providing the device and the method for adjusting the center of the generator stator, which are convenient to operate, small in adjustment amount and easy to control, can quickly adjust the center of the generator stator in place, cannot damage the generator stator, can save the installation time and reduce the labor intensity of workers.
The technical scheme for solving the technical problems is as follows:
the utility model provides a generator stator center adjusting device, it includes stator center adjusting plate, adjusting bolt, air gap measurement piece, and stator center adjusting plate is bar steel sheet, and there is the screw at stator center adjusting plate's face center, and the screw is with adjusting bolt's assorted, and four stator center adjusting plates symmetry welding respectively is in the both sides of stator platen, and two in every side, and the air gap measurement piece is steel sheet piece, and the thickness of air gap measurement piece matches with the air gap after stator and the rotor installation.
According to the generator stator center adjusting device, two air gap measuring blocks are arranged, the maximum thickness of one air gap measuring block is 110% of the air gap average value of the same section, the minimum thickness of the other air gap measuring block is 90% of the air gap average value of the same section, the air gaps between the generator stator and the rotor are uniform, and the mutual difference is 5% of the air gap average value.
The method for adjusting the center of the generator stator by using the device for adjusting the center of the generator stator comprises the following steps:
a. the mounting positions of the stator center adjusting plates are determined on two sides of the stator by using a steel plate ruler, and the mounting positions select four points of upper, lower, left and right of the same section at two ends of a stator bedplate;
b. symmetrically welding four stator center adjusting plates at mounting positions on two sides of a stator bedplate respectively, wherein the plate surfaces of the four stator center adjusting plates are vertical, and the plate surfaces of the four stator center adjusting plates are along the length direction of the stator bedplate;
c. marking the rotor at every 90 degrees in the upper, lower, left and right positions, then moving the rotor according to the rotating steering wheel of the rotor during operation, stopping when the marking points rotated to 90 degrees are stopped, measuring gaps between upper, lower, left and right stators at the front and rear ends of the generator and the rotor, obtaining four data at each end gap after the rotor disc moves for one circle, and taking an average value;
d. the height of the stator is adjusted by increasing or decreasing the base adjusting gaskets;
e. c, adjusting the transverse position of the stator, screwing an adjusting bolt into a screw hole of a central adjusting plate of the stator to enable the adjusting bolt to be respectively contacted with two sides of the stator, determining the transverse moving distance of the stator according to the data measured in the step a, fixing a clearance gauge on the thickness after the moving distance is determined, screwing the adjusting bolt in the screw hole of the central adjusting plate of the stator outwards at one side of the moving direction of the stator, wherein the screwed distance is equal to the measured transverse moving distance of the stator, measuring the distance by using the clearance gauge, screwing the adjusting bolt in the screw hole of the central adjusting plate of the stator into the other side of the stator, pushing the stator forwards by using the adjusting bolt, and moving the stator until the other side of the stator is in close contact with the adjusting bolt in the screw hole of the central adjusting plate of the stator;
f. the air gap measuring block is inserted into the upper and lower gaps of the stator and the rotor, the air gap of the stator and the rotor is measured, and the height of the stator is adjusted by increasing and decreasing the base adjusting gasket, so that the upper and lower air gap of the stator and the rotor is positioned between the thicknesses of the two air gap measuring blocks;
g. the method comprises the steps of inserting an air gap measuring block into left and right gaps of a stator and a rotor, measuring the air gap of the stator and the rotor, and finely adjusting the transverse position of the stator through adjusting bolts in screw holes of central adjusting plates on two sides of the stator, so that the left and right air gaps of the stator and the rotor are positioned between the thicknesses of the two air gap measuring blocks;
h. after the air gap measuring block can smoothly pass through the gap between the stator and the rotor, the air gap is accurately measured by using a 1-meter feeler gauge, after the readings of the feeler gauge are obtained, the transverse position of the stator is finely adjusted by adjusting bolts in screw holes of a central adjusting plate, and the upper air gap value and the lower air gap value of the stator are adjusted by increasing and decreasing base adjusting gaskets, so that the air gap value between the stator and the rotor of the generator is ensured to be uniform, and the mutual difference is 5% of the average air gap value.
According to the method for adjusting the center of the generator stator, the relative positions of the measuring stator and the rotor are carried out at the corresponding points at the two ends of the stator, and marks are made after the measuring is determined so as to ensure the accuracy of adjustment of the measuring.
According to the method for adjusting the center of the generator stator, the length of the generator stator is generally about 4 meters, the iron wire with the diameter of 6 is welded with the air gap measuring block, the length of the iron wire is 700-1000mm, and the iron wire can reach deeper inside the stator, so that the accuracy of air gap measurement is guaranteed.
The beneficial effects of the invention are as follows:
according to the invention, the two sides of the stator platen are respectively and fixedly connected with the stator center adjusting plates, the adjusting bolts penetrate through screw holes of the stator center adjusting plates to respectively and oppositely face the two sides of the stator, and the stator is transversely moved by rotating the adjusting bolts through the cooperation of the feelers so as to achieve the purpose of adjusting the center position of the stator; and meanwhile, the gap between the stator and the rotor is detected through the air gap measuring block, and then the gap between the stator and the rotor is adjusted through the stator center adjusting plate and the adjusting bolt, so that the average value of the air gap is within 10%.
The invention is the initiative of the installation of the generator stator, has the advantages of simple manufacture, convenient operation, no limitation of conditions and strong universality, solves the problems of small adjustment quantity of the center of the turbine generator stator and difficult control of force in the installation process of equipment, overcomes the defect of moving by knocking the generator stator in the prior art, avoids the damage of the generator stator, saves the installation and maintenance time, greatly reduces the labor intensity of workers, and has excellent popularization and use values in the industry.
Drawings
FIG. 1 is a schematic view of a stator centering device of the present invention;
fig. 2 is a top view of fig. 1.
The figures are labeled as follows: stator platen 1, stator 2, rotor 3, stator center adjustment plate 4, adjusting bolt 5.
Detailed Description
The generator stator center adjusting device comprises a stator center adjusting plate 4, an adjusting bolt 5 and an air gap measuring block.
In the figure, the stator center adjusting plate 4 is a strip-shaped steel plate, the center of the plate surface of the stator center adjusting plate 4 is provided with a screw hole, the screw hole is matched with the adjusting bolt 5, and four stator center adjusting plates 4 are symmetrically welded on two sides of the stator platen 1 respectively, and two groups are arranged on each side. The faces of the four stator center adjusting plates 4 are vertical, and the faces of the four stator center adjusting plates 4 are along the length direction of the stator bedplate 1.
In the figure, four adjusting bolts 5 respectively penetrate through screw holes in the center of the surface of the stator center adjusting plate 4, the front ends of the four adjusting bolts 5 respectively contact with two sides of the stator 2, and the stator 2 can be transversely moved by rotating the adjusting bolts 5.
The air gap measuring block is a steel plate block, and the thickness of the air gap measuring block is matched with the air gap after the stator 2 and the rotor 3 are installed. Since the air gap between the stator 2 and the rotor 3 should be uniform, the difference between the measured value and the average value of the air gap with the same section should be within 10% of the average value of the air gap, and should not exceed 1mm at maximum. Therefore, the two air gap measuring blocks are arranged, the thickness of one air gap measuring block is 110% of the air gap average value of the same section, the thickness of the other air gap measuring block is 90% of the air gap average value of the same section, and the difference between the thickness of the two air gap measuring blocks and the air gap average value is 1mm, so that the requirements are met.
When the air gap measuring block is manufactured, the length of the generator stator 2 is generally about 4 meters, and the air gap measuring block needs to extend into the generator stator 2 to measure the gap, so that an iron wire phi 6 is used for welding with the air gap measuring block, the length of the iron wire is 700-1000mm, and the iron wire can reach deeper inside the stator 2, so that the accuracy of air gap measuring values is ensured.
The invention relates to a method for adjusting the center of a generator stator, which comprises the following steps:
firstly, determining the mounting positions of a stator center adjusting plate 4 on two sides of a stator by using a steel plate ruler, wherein the mounting positions select four points of upper, lower, left and right of the same section at two ends of a stator bedplate 1;
secondly, symmetrically welding four stator center adjusting plates 4 at mounting positions on two sides of the stator bedplate 1 respectively, wherein the plate surfaces of the four stator center adjusting plates 4 are vertical, and the plate surfaces of the four stator center adjusting plates 4 are along the length direction of the stator bedplate 1;
thirdly, marking the rotor 3 at intervals of 90 degrees in the up, down, left and right directions, then moving the rotor 3 according to a rotating steering wheel of the rotor 3 during operation, stopping at the marking points rotated to 90 degrees, measuring gaps between the upper, down, left and right stators 2 and the rotor 3 at the front end and the rear end of the generator, and obtaining four data from the gaps at each end after the rotor 3 is rotated for one circle, and taking an average value;
fourth, the height of the stator 2 is adjusted by increasing or decreasing the base adjusting gaskets;
fifthly, adjusting the transverse position of the stator 2, screwing an adjusting bolt 5 into a screw hole of a stator center adjusting plate 4 to enable the adjusting bolt 5 to be respectively contacted with two sides of the stator 2, determining the transverse moving distance of the stator 2 according to the data measured in the first step, fixing a clearance gauge on the thickness after the moving distance is determined, screwing the adjusting bolt 5 in the screw hole of the stator center adjusting plate 1 outwards at one side of the moving direction of the stator 2, wherein the screwed distance is equal to the measured transverse moving distance of the stator 2, the distance is measured by using the clearance gauge, screwing the adjusting bolt 5 in the screw hole of the stator center adjusting plate 4 at the other side of the stator 2, pushing the stator 2 forwards by the adjusting bolt 5, and moving the stator 2 until the other side of the stator 2 is tightly contacted with the adjusting bolt 5 in the screw hole of the stator center adjusting plate 4;
step six, inserting an air gap measuring block into the upper and lower gaps of the stator 2 and the rotor 3, measuring the air gap of the stator 2 and the rotor 3, and adjusting the height of the stator 2 by increasing and decreasing the base adjusting gaskets to enable the upper and lower air gaps of the stator 2 and the rotor 3 to be positioned between the thicknesses of the two air gap measuring blocks;
the air gap measuring blocks are inserted into the upper and lower gaps of the stator 2 and the rotor 3 such that the gaps are less than 110% of the average air gap and more than 90% of the average air gap, i.e., the air gap measuring blocks having a large thickness cannot be inserted, and the air gap measuring blocks having a small thickness can be inserted.
Seventh, the air gap measuring blocks are inserted into the left and right gaps of the stator 2 and the rotor 3, the air gap of the stator 2 and the rotor 3 is measured, and the transverse position of the stator 2 is finely adjusted by adjusting the adjusting bolts 5 in the screw holes of the center adjusting plates 4 on two sides of the stator 2, so that the left and right air gap of the stator 2 and the rotor 3 is positioned between the thicknesses of the two air gap measuring blocks.
Eighth, after the air gap measuring block can pass through the gap between the stator and the rotor smoothly, the air gap is measured accurately by using a 1 meter feeler gauge, after the readings of the feeler gauge are obtained, the transverse position of the stator 2 is finely adjusted by an adjusting bolt 5 in a screw hole of a central adjusting plate 4, and the upper and lower air gap values of the stator 2 are adjusted by increasing and decreasing a base adjusting gasket, so that the air gap value between the stator and the rotor of the generator is ensured to be uniform, and the mutual difference is 5% of the average air gap value.
In the above adjustment process, the measurement of the relative positions of the stator 2 and the rotor 3 should be performed at the corresponding points at both ends of the stator 2, and marks are made after the measurement is determined, so as to ensure the accuracy of the adjustment of the measurement.
One embodiment of the invention is as follows:
in the generator side installation process of the No. 4 generator set, the generator set installation technology requires that the air gap value between the stator 2 and the rotor 3 is 22mm, and the generator set is centered and aligned by using the generator stator center adjusting device.
The length of the stator center adjusting plate 4 is 100mm, the width is 80mm, and the thickness is 30mm; the adjusting bolt 5 is an M30 bolt; the length of the air gap measuring block is 40mm, the width is 25mm, and the thicknesses of the two air gap measuring blocks are 24mm and 20mm respectively. The length of the stator 2 of the No. 4 generator is 4 meters, and an iron wire with the length of 1000mm is selected to be welded with an air gap measuring block.
The air gap measuring block with the thickness of 20mm stretches into the deeper part of the stator 2 of the generator set, and when the air gap measuring block with the thickness of 20mm smoothly passes through the gap between the stator 2 and the rotor 3, the air gap is accurately measured by a 1-meter feeler gauge. The measured numerical deviation is used for fine-adjusting the transverse position of the stator 2 through an adjusting bolt 5 in a screw hole of the central adjusting plate 4, and the upper and lower air gap values of the stator 2 are adjusted through increasing and decreasing the base adjusting gaskets.
After the foundation bolt is fastened on the generator side of the No. 4 generator set, the upper, lower, left and right air gap values of 22.2mm, 21.8mm, 22mm and 22mm are retested, and the installation technical requirement that the air gap between the generator stator 2 and the rotor 3 should be uniform and the mutual difference is 5% of the average air gap value is completely met.
Claims (3)
1. A method for adjusting the center of a generator stator is characterized by comprising the following steps: the adopted adjusting device comprises a stator center adjusting plate (4), adjusting bolts (5) and air gap measuring blocks, wherein the stator center adjusting plate (4) is a strip-shaped steel plate, a screw hole is formed in the center of the plate surface of the stator center adjusting plate (4), the screw hole is matched with the adjusting bolts (5), the four stator center adjusting plates (4) are symmetrically welded on two sides of a stator platen (1) respectively, each side is provided with two air gap measuring blocks, the air gap measuring blocks are steel plate blocks, and the thickness of each air gap measuring block is matched with an air gap after the stator (2) and a rotor (3) are installed; the method comprises the following steps:
a. the mounting positions of the stator center adjusting plates (4) are determined on two sides of the stator (2) by using a steel plate ruler, and the mounting positions are two on two sides of the stator bedplate (1) and two on each side;
b. the four stator center adjusting plates (4) are symmetrically welded at the mounting positions on two sides of the stator bedplate (1) respectively, the plate surfaces of the four stator center adjusting plates (4) are perpendicular to the stator bedplate (1), and the plate surfaces of the four stator center adjusting plates (4) are along the length direction of the stator bedplate (1);
c. marking a rotor (3) at intervals of 90 degrees in the up, down, left and right directions, then moving the rotor (3) according to a rotating steering wheel of the rotor (3) during operation, stopping when a marking point rotating to 90 degrees is turned on, measuring gaps between a stator (2) and the rotor (3) at the up, down, left and right directions at the front end and the rear end of a generator, and obtaining four data at each end gap after the rotor (3) is rotated for one circle, and taking an average value;
the two air gap measuring blocks are arranged, the thickness of one air gap measuring block is 110% of the average value of the air gap of the same section, the thickness of the other air gap measuring block is 90% of the average value of the air gap of the same section, and the difference between the thickness of the two air gap measuring blocks and the average value of the air gap is 1mm;
d. the height of the stator (2) is adjusted by increasing or decreasing the base adjusting gaskets;
e. c, adjusting the transverse position of the stator (2), screwing an adjusting bolt (5) into a screw hole of a stator center adjusting plate (4) to enable the adjusting bolt (5) to be respectively contacted with two sides of the stator (2), determining the transverse moving distance of the stator (2) according to the data measured in the step c, fixing a clearance gauge in the direction of the transverse movement of the stator after the moving distance is determined, screwing the adjusting bolt (5) in the screw hole of the stator center adjusting plate (4) outwards at one side of the moving direction of the stator (2), wherein the screwing distance is equal to the measured transverse moving distance of the stator (2), the distance is measured by the clearance gauge, screwing the adjusting bolt (5) in the screw hole of the stator center adjusting plate (4) at the other side of the stator (2), pushing the stator (2) forwards by the adjusting bolt (5), and moving the stator (2) until the other side of the stator (2) is tightly contacted with the adjusting bolt (5) in the screw hole of the stator center adjusting plate (4);
f. the air gap measuring block is inserted into the upper and lower gaps of the stator (2) and the rotor (3), the air gap between the stator (2) and the rotor (3) is measured, and the height of the stator (2) is adjusted by increasing and decreasing the base adjusting gaskets, so that the upper and lower air gaps of the stator (2) and the rotor (3) are positioned between the thicknesses of the two air gap measuring blocks;
g. the air gap measuring block is inserted into the left and right gaps of the stator (2) and the rotor (3), the air gap between the stator (2) and the rotor (3) is measured, and the transverse position of the stator (2) is finely adjusted through adjusting bolts (5) in screw holes of center adjusting plates (4) on two sides of the stator (2), so that the left and right air gaps of the stator (2) and the rotor (3) are positioned between the thicknesses of the two air gap measuring blocks;
h. after an air gap measuring block with the thickness of 90% of the air gap average value of the same section can smoothly pass through the gap between the stator (2) and the rotor (3), the air gap is accurately measured by using a 1-meter feeler gauge, after the reading of the feeler gauge is obtained, the transverse position of the stator (2) is finely adjusted by an adjusting bolt (5) in a screw hole of a stator center adjusting plate (4), the upper air gap value and the lower air gap value of the stator (2) are adjusted by increasing and decreasing a base adjusting gasket, the uniformity of the air gap value between the stator and the rotor of the generator is ensured, and the mutual difference is 5% of the air gap average value.
2. The generator stator centering method of claim 1, characterized by: the relative positions of the stator (2) and the rotor (3) are measured at corresponding points at two ends of the stator (2), and marks are made after the measurement is determined so as to ensure the accuracy of the adjustment of the measurement.
3. The generator stator centering method of claim 2, characterized by: the length of the generator stator (2) is 4 meters, and an iron wire with the diameter of phi 6 is welded with the air gap measuring block, wherein the length of the iron wire is 700-1000mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811223611.7A CN109194068B (en) | 2018-10-19 | 2018-10-19 | Generator stator center adjusting device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811223611.7A CN109194068B (en) | 2018-10-19 | 2018-10-19 | Generator stator center adjusting device and method |
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| CN109194068A CN109194068A (en) | 2019-01-11 |
| CN109194068B true CN109194068B (en) | 2023-10-27 |
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| CN111023948A (en) * | 2019-12-26 | 2020-04-17 | 上海电气集团上海电机厂有限公司 | End cover structure for measuring air gap of single-pivot motor and air gap measuring method of single-pivot motor |
| CN111106729B (en) * | 2020-01-16 | 2021-04-30 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Motor stator and rotor countershaft assembly method |
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| CN104348310A (en) * | 2014-11-12 | 2015-02-11 | 中国十九冶集团有限公司南京分公司 | Mounting method for field rotor penetration of TRT (Top Gas Pressure Recovery Turbine) generator |
| CN106441024A (en) * | 2016-09-30 | 2017-02-22 | 马鞍山钢铁股份有限公司 | Generator air gap measuring device |
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2018
- 2018-10-19 CN CN201811223611.7A patent/CN109194068B/en active Active
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| JPH07241050A (en) * | 1994-02-25 | 1995-09-12 | Hino Motors Ltd | Motor gap adjuster for electric automobile |
| CN101635488A (en) * | 2009-08-26 | 2010-01-27 | 中冶集团华冶资源开发有限责任公司 | Method for aligning concentricity of exciter rotor and generator rotor of turbogenerator |
| CN102654143A (en) * | 2011-03-02 | 2012-09-05 | 南通大通宝富风机有限公司 | Air blower bottom board with stator adjusting device |
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