CN116247866A - Center adjustment method for motor support and motor on shaft seal nuclear main pump of nuclear power station - Google Patents
Center adjustment method for motor support and motor on shaft seal nuclear main pump of nuclear power station Download PDFInfo
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- CN116247866A CN116247866A CN202310161838.8A CN202310161838A CN116247866A CN 116247866 A CN116247866 A CN 116247866A CN 202310161838 A CN202310161838 A CN 202310161838A CN 116247866 A CN116247866 A CN 116247866A
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- motor
- outer ring
- center
- main pump
- motor support
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/26—Means for adjusting casings relative to their supports
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to a center adjusting method of a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station, wherein the rotation of a motor rotor is replaced by the rotation of a centering device, the rotation of an outer ring of the centering device can be regarded as the rotation of the motor rotor, the direction of pushing the motor is determined according to the reading of a measuring meter on the centering device, the coaxial coincidence of the outer ring of the centering device and a circle in a bearing chamber is realized, the coaxial coincidence of the motor rotor and the circle in the bearing chamber is realized, and the center of the motor is coaxial with the motor support on the nuclear main pump in a reference transmission mode, so that the positions of the motor support and the center of the motor on the nuclear main pump are determined. The process method has high adjustment precision and high efficiency, avoids the occurrence of the situation of grinding the bearing bush and the like caused by inaccurate adjustment position in the operation process, reduces the vibration value, avoids the situation of grinding the bearing bush caused by dry grinding of the thrust disc and the bearing bush in the adjustment process by using the aligning device, and avoids the loss and hidden danger.
Description
Technical field:
the invention relates to a center adjustment method for a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station.
The background technology is as follows:
the central adjustment method for the motor support and the motor on the general assembly shaft seal nuclear main pump of the nuclear power station shaft seal main pump manufacturing plant is a key for the normal operation of the nuclear power station shaft seal main pump, and if the central adjustment is not accurate enough, the conditions of excessive vibration, tile burning, tile grinding and the like of the main pump can be caused, so that the nuclear main pump can not normally operate, and serious major accidents can occur. The central adjustment of the motor support and the motor on the nuclear main pump in the total assembly of the shaft seal main pump manufacturing plant of the nuclear power station is a key process in the main pump assembly, is also a core process, and is particularly important for localization of the shaft seal nuclear main pump. The accuracy of the central adjustment of the motor support and the motor on the shaft seal nuclear main pump of the nuclear power station is always an international technical problem. The method adopted at present is that at least four persons are on the upper part of a motor, a tool with a long rod is connected to the motor shaft, the long rod is pushed to drive a motor rotor to rotate, the method has the following defects that firstly, the motor rotor weighs about 20 tons, so that the rotor is difficult to push to rotate, certain dangerousness is brought to overhead operation on the motor, secondly, a thrust disc on the motor rotor and a bearing bush are driven to generate sliding friction when the motor rotor rotates, an oil supply system cannot be started at the moment, the thrust disc and the bearing bush are easy to dry-grind, so that the situation that the bearing bush is damaged is brought, loss and hidden danger are brought, thirdly, the motor rotor rotates at the center of a stator, otherwise, the reading of a measuring meter is inaccurate, the rotor is difficult to keep at the center of an electronic stator because of the fact that the rotor weight is too large, the rotor is often inaccurate due to the rotor position change, the integral operation of a main pump of a unit is influenced, and the vibration is too large, so that the main pump unit is disassembled again, and a large amount of time adjustment is consumed, and the operation difficulty of workers is increased.
The invention comprises the following steps:
the invention aims to disclose a center adjusting method for a motor support and a motor on a nuclear main pump of a shaft seal of a nuclear power station, which has high precision and high adjusting efficiency. The technical scheme of the invention is as follows: a center adjustment method for a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station comprises the following steps:
1) the upper motor support (1) is located on the tool support (2), four adjusting plates (4) are fixed on the upper motor support (1) by two first bolts (3), and one adjusting plate (4) is installed at intervals of 90 degrees;
2) The protective sleeve (5) is arranged at the lower end part of the motor rotor (6), the motor (7) falls on the upper motor support (1) through the guide of the adjusting plate (4), and the protective sleeve (5) at the lower end part of the motor rotor (6) is disassembled;
3) The screw (8) is assembled at the lower end part of the motor rotor (6), the aligning device (9) is arranged at the lower end part of the motor rotor (6), a nut (10) is assembled on the screw (8) for fixing the aligning device (9), a first magnetic attraction measuring meter (11) and a second magnetic attraction measuring meter (12) are respectively fixed on two measuring meter bases (13) of the aligning device (9), the first magnetic attraction measuring meter (11) measures the inner circle of a lower bearing chamber (16), and the second magnetic attraction measuring meter (12) measures the lower end surface of the lower bearing chamber (16);
4) The motor rotor (6) is arranged at the center of the motor (7), and the center of the motor (7) refers to the theoretical center of the stator of the motor;
5) The outer ring (14) of the centering device (9) is rotated, the numerical value displayed by the first magnetic attraction measuring meter (11) is S1, and the reading of the second magnetic attraction measuring meter (12) is S2;
wherein the requirements are as follows: measurement value of S1: s1 is less than 0.02mm
Measurement value of S2: s2 is less than 0.02mm
6) And if the numerical range displayed by the S1 is not in accordance with the requirements, adjusting the positions of the motors (7) through the four second bolts (15) of the rotary adjusting plate (4) until the numerical range is in accordance with the requirements, and if the numerical range displayed by the S2 is not in accordance with the requirements, adjusting the level of the motors (7) until the numerical range is in accordance with the requirements, namely finishing the center adjustment.
The aligning device (9) comprises an inner ring (17) and an outer ring (14), one rolling bearing ring (18) is arranged at the upper end of the inner ring (17) and the upper end of the outer ring (14), the other rolling bearing ring (18) is arranged at the lower end of the inner ring (17) and the lower end of the outer ring (14), the upper end of the inner ring (17) and the upper end of the outer ring (14) and the lower end of the inner ring (17) and the lower end of the outer ring (14) are respectively provided with two baffle rings (20) on the outer ring (14) by sixteen third bolts (19), a fourth bolt (21) is used for fixing the meter base (13) on the outer ring (14), and eight fifth bolts (22) are used for fixing the connecting flange (23) on the inner ring (17).
The upper end of the inner ring (17) and the upper end of the outer ring (14) and the upper end of the inner ring (17) and the lower end of the outer ring (14) clamp the rolling bearing ring (18), the outer ring (14) can rotate freely, and the centering device (9) can replace a workpiece to rotate in the centering process after being assembled on the workpiece.
The outer ring (14) is provided with two meter bases (13).
The process and the aligning device (9) can be applied to the position adjustment of the upper motor support and the sealing chamber.
The technical principle of the invention is as follows:
the invention relates to a method for determining the position of a motor support and a motor on a nuclear main pump, which is characterized in that the center of a bearing chamber in the motor support and the center of a motor rotor are in theoretical coincidence, firstly, the motor rotor is adjusted to the theoretical center position of a motor stator, namely the center position of the motor in the invention, then the motor rotor and the motor are regarded as a whole, a centering device is arranged at the lower end part of the motor rotor, the rotation of an outer ring of the centering device is used for replacing the rotation of the motor rotor, the rotation of the outer ring of the centering device can be regarded as the rotation of the motor rotor, the direction of pushing the motor is determined according to the reading of a measuring meter on the centering device, the coaxial coincidence requirement of the outer ring of the centering device and the inner circle of the bearing chamber is realized, and the position of the motor support and the motor on the nuclear main pump is determined in a reference transmission mode, namely the coaxial between the center of the motor and the motor support on the nuclear main pump.
The invention has the technical effects that:
the invention creatively adopts the aligning device to replace the rotation of the motor rotor in the process of adjusting the center of the motor support and the motor on the nuclear main pump, and finally determines the center of the motor support and the motor on the nuclear main pump in a reference transmission mode, thereby determining the correct positions of the motor support and the motor on the nuclear main pump; the third advantage of the invention is that the position of the motor rotor and the bearing chamber is fixed in the adjusting process of the method, the position change caused by the rotation of the aligning device is avoided, the adjusting precision is improved, the condition of readjustment and reassembling caused by unqualified adjustment is avoided, the risk of overlarge vibration caused by the integral operation of a main pump unit is reduced, the fourth advantage of the invention is that the method greatly improves the working efficiency, the original adjusting process can be completed in less time, the method can be applied to the position adjustment of a motor support and a sealing chamber on a nuclear main pump, the method has multiple purposes, the accuracy of the rotation center adjustment of the main pump is greatly improved, the working efficiency is reduced, the manufacturing cost is improved, the sixth advantage of the method is that two measuring bases on the aligning device are arranged outside a main pump ring, and the two axial magnetic force measuring bases can be simultaneously and stably and axially measured, and numerical values can be simultaneously and stably displayed.
Description of the drawings:
FIG. 1 is a schematic diagram of a measuring position of a measuring meter
Fig. 2 is a schematic diagram of motor support and motor adjustment state
FIG. 3 is a block diagram of the aligning device
The specific embodiment is as follows:
when the shaft seal nuclear main pump unit is assembled for the first time in a manufacturing plant, when the central positions of an upper motor support and a motor are not determined, the positions are adjusted through a centering device arranged on a motor rotor according to the readings of a measuring meter on the centering device, so that the shaft seal nuclear main pump unit meets the operation requirement.
A center adjustment method for a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station comprises the following steps:
as shown in fig. 2, 1) the upper motor support 1 is located on the tool support 2, four adjusting plates 4 are fixed on the upper motor support 1 by two first bolts 3 respectively, and one adjusting plate 4 is installed every 90 degrees;
2) The protective sleeve 5 is arranged at the lower end part of the motor rotor 6, the motor 7 is guided by the adjusting plate 4 to fall on the upper motor support 1, and the protective sleeve 5 at the lower end part of the motor rotor 6 is detached;
as shown in fig. 1, 3) a screw 8 is assembled at the lower end part of a motor rotor 6, a centering device 9 is installed at the lower end part of the motor rotor 6, a nut 10 is assembled on the screw 8 for fixing the centering device 9, a first magnetic attraction measuring meter 11 and a second magnetic attraction measuring meter 12 are respectively fixed on two measuring meter bases 13 of the centering device 9, the first magnetic attraction measuring meter 11 measures the inner circle of a lower bearing chamber 16, and the second magnetic attraction measuring meter 12 measures the lower end surface of the lower bearing chamber 16;
4) The motor rotor 6 is arranged at the center of the motor 7, and the center of the motor 7 refers to the theoretical center of the stator of the motor;
5) The outer ring 14 of the aligning device 9 is rotated, the numerical value displayed by the first magnetic attraction measuring meter 11 is S1, and the reading of the second magnetic attraction measuring meter 12 is S2;
wherein the requirements are as follows: measurement value of S1: s1 is less than 0.02mm
Measurement value of S2: s2 is less than 0.02mm
6) If the numerical range displayed in the S1 is not in accordance with the requirements, the positions of the motors 7 are adjusted by rotating the four second bolts 15 of the adjusting plate 4 until the numerical range is in accordance with the requirements, and if the numerical range displayed in the S2 is not in accordance with the requirements, the level of the motors 7 is adjusted until the numerical range is in accordance with the requirements, namely, the center adjustment is completed.
As shown in fig. 3, the aligning device 9 includes an inner ring 17 and an outer ring 14, one rolling bearing ring 18 is installed at the upper end of the inner ring 17 and the upper end of the outer ring 14, the other rolling bearing ring 18 is installed at the lower end of the inner ring 17 and the lower end of the outer ring 14, two stopper rings 20 are installed at the upper end of the inner ring 17 and the upper end of the outer ring 14 and the lower end of the inner ring 17 and the lower end of the outer ring 14, respectively, with sixteen third bolts 19, a fourth bolt 21 fixes the gauge base 13 to the outer ring 14, and eight fifth bolts 22 fix the connecting flange 23 to the inner ring 17.
The upper ends of the inner ring 17 and the outer ring 14 clamp the rolling bearing ring 18 with the upper ends of the inner ring 17 and the lower ends of the outer ring 14, the outer ring 14 can rotate freely, and the centering device 9 can replace a workpiece to rotate in the centering process after being assembled on the workpiece.
The outer ring 14 is provided with two meter bases 13.
The process and the aligning device 9 can be applied to the position adjustment of the upper motor support and the sealing chamber.
Claims (5)
1. A center adjustment method for a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station is characterized by comprising the following steps: the method comprises the following steps:
1) the upper motor support (1) is located on the tool support (2), four adjusting plates (4) are fixed on the upper motor support (1) by two first bolts (3), and one adjusting plate (4) is installed at intervals of 90 degrees;
2) The protective sleeve (5) is arranged at the lower end part of the motor rotor (6), the motor (7) falls on the upper motor support (1) through the guide of the adjusting plate (4), and the protective sleeve (5) at the lower end part of the motor rotor (6) is disassembled;
3) The screw (8) is assembled at the lower end part of the motor rotor (6), the aligning device (9) is arranged at the lower end part of the motor rotor (6), a nut (10) is assembled on the screw (8) for fixing the aligning device (9), a first magnetic attraction measuring meter (11) and a second magnetic attraction measuring meter (12) are respectively fixed on two measuring meter bases (13) of the aligning device (9), the first magnetic attraction measuring meter (11) measures the inner circle of a lower bearing chamber (16), and the second magnetic attraction measuring meter (12) measures the lower end surface of the lower bearing chamber (16);
4) The motor rotor (6) is arranged at the center of the motor (7), and the center of the motor (7) refers to the theoretical center of the stator of the motor;
5) The outer ring (14) of the centering device (9) is rotated, the numerical value displayed by the first magnetic attraction measuring meter (11) is S1, and the reading of the second magnetic attraction measuring meter (12) is S2;
wherein the requirements are as follows: measurement value of S1: s1 is less than 0.02mm
Measurement value of S2: s2 is less than 0.02mm
6) And if the numerical range displayed by the S1 is not in accordance with the requirements, adjusting the positions of the motors (7) through the four second bolts (15) of the rotary adjusting plate (4) until the numerical range is in accordance with the requirements, and if the numerical range displayed by the S2 is not in accordance with the requirements, adjusting the level of the motors (7) until the numerical range is in accordance with the requirements, namely finishing the center adjustment.
2. The method for adjusting the center of a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station according to claim 1 is characterized in that: the aligning device (9) comprises an inner ring (17) and an outer ring (14), one rolling bearing ring (18) is arranged at the upper end of the inner ring (17) and the upper end of the outer ring (14), the other rolling bearing ring (18) is arranged at the lower end of the inner ring (17) and the lower end of the outer ring (14), the upper end of the inner ring (17) and the upper end of the outer ring (14) and the lower end of the inner ring (17) and the lower end of the outer ring (14) are respectively provided with two baffle rings (20) on the outer ring (14) by sixteen third bolts (19), a fourth bolt (21) is used for fixing the meter base (13) on the outer ring (14), and eight fifth bolts (22) are used for fixing the connecting flange (23) on the inner ring (17).
3. The method for adjusting the center of a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station according to claim 1 is characterized in that: the upper end of the inner ring (17) and the upper end of the outer ring (14) and the upper end of the inner ring (17) and the lower end of the outer ring (14) clamp the rolling bearing ring (18), the outer ring (14) can rotate freely, and the centering device (9) can replace a workpiece to rotate in the centering process after being assembled on the workpiece.
4. The method for adjusting the center of a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station according to claim 1 is characterized in that: the outer ring (14) is provided with two meter bases (13).
5. The method for adjusting the center of a motor support and a motor on a shaft seal nuclear main pump of a nuclear power station according to claim 1 is characterized in that: the process and the aligning device (9) can be applied to the position adjustment of the upper motor support and the sealing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310161838.8A CN116247866A (en) | 2023-02-24 | 2023-02-24 | Center adjustment method for motor support and motor on shaft seal nuclear main pump of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310161838.8A CN116247866A (en) | 2023-02-24 | 2023-02-24 | Center adjustment method for motor support and motor on shaft seal nuclear main pump of nuclear power station |
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| Publication Number | Publication Date |
|---|---|
| CN116247866A true CN116247866A (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310161838.8A Pending CN116247866A (en) | 2023-02-24 | 2023-02-24 | Center adjustment method for motor support and motor on shaft seal nuclear main pump of nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116247866A (en) |
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2023
- 2023-02-24 CN CN202310161838.8A patent/CN116247866A/en active Pending
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