CN114406954A - Clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump - Google Patents
Clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump Download PDFInfo
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- CN114406954A CN114406954A CN202210121274.0A CN202210121274A CN114406954A CN 114406954 A CN114406954 A CN 114406954A CN 202210121274 A CN202210121274 A CN 202210121274A CN 114406954 A CN114406954 A CN 114406954A
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- adjusting bolt
- tiles
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000013459 approach Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a holding type adjusting method for odd number asymmetric radial bush gaps of a shaft seal type nuclear main pump, which is used for completing the assembly of a radial bearing and comprises the following steps: the bearing assembly tool comprises an inner hexagon screw (1), a bearing chamber (2), a sliding block (3), a spherical part (4), a sliding block adjusting bolt (5), a hexagon nut (6), an adjusting screw gasket (9), a tile base (10), a hexagon head screw (11), a spherical part screw (12), a radial tile (13) and a cover ring (14), wherein the hexagon nut (6) is in a loosening state. The invention can ensure the coaxiality between the radial tiles and the gap between the bearing sleeve and the radial tiles, and solves the problems that the bearing sleeve and the radial tiles are not coaxial due to the asymmetrical structure and odd distribution of the radial tiles and the gap between the bearing sleeve and the radial tiles is not uniform due to inaccurate adjustment of the radial tiles.
Description
The technical field is as follows:
the invention relates to a method for tightly adjusting odd number asymmetric radial bush gaps of a shaft seal type nuclear main pump.
Background art:
the radial bearing of the shaft-sealed nuclear main pump of the nuclear power station is a main component of a bidirectional thrust bearing and is also a key component of the nuclear main pump, and the control of the odd number of radial tile gaps with asymmetric structures is particularly important for normal operation of the shaft-sealed nuclear main pump and localization of a main pump manufacturing technology. The accurate adjustment of the gap between the odd number asymmetric structure radial tiles of the shaft seal type nuclear main pump is always a technological problem. The adjustment process of the gap of the traditional radial tile with the even-number symmetrical structure is not suitable for the novel radial tile with the odd-number asymmetrical structure, the adjustment mode is a cross-shaped symmetrical method, and when the process is used for the radial tile with the odd-number asymmetrical structure, obvious quality defects can be generated, and the adjustment process comprises the following steps: the internal disalignment of circle in all radial tiles, the not equidirectional radial tile is inhomogeneous with bearing sleeve's clearance, thereby lead to radial tile and bearing sleeve clearance uncontrolled and unable accurate measurement, lead to the bearing sleeve to pack into in the radial tile even, radial tile need readjust the clearance, and the result of readjustment is still not accurate enough, the loss and the time limit for a project delay of cost have been brought, even pack into and also probably cause bearing sleeve eccentric, thereby make bearing sleeve and radial tile eccentric wear, produce the metal debris, the oil temperature oil pressure is unusual, the main pump vibration is too big, then more serious can cause nuclear power plant's accident.
The invention content is as follows:
the invention aims to disclose a holding type adjusting method for an odd number of asymmetric radial tile gaps of a shaft seal type nuclear main pump, which has the advantages of high reliability, high precision, high efficiency and stable data. The technical scheme of the invention is as follows: the method of positioning the feeler gauge and tightly holding the tool sleeve by the radial tiles is adopted, so that all the radial tiles are coaxial and the gap between the bearing sleeve and the radial tiles is determined, and the method comprises the following steps:
1) and finishing the radial bearing assembly: placing a bearing chamber (2) on a tile base (10), assembling a spherical part (4) and a radial tile (13) together by using a spherical part screw (12), installing an adjusting screw gasket (9) and a hexagon head screw (11) on the tile base (10), assembling a sliding block (3), a sliding block adjusting bolt (5) and a hexagon nut (6) on the bearing chamber (2) and the tile base (10), placing the assembly of the spherical part (4) and the radial tile (13) on the tile base (10), enabling the spherical part (4) to be attached to the sliding block (3), enabling the sliding block (3) to be attached to the bearing chamber (2), installing a cover ring (14) on the bearing chamber (2) by using an inner hexagon screw (1), and enabling the hexagon nut (6) to be in a loose state;
2) viewing the sliding block adjusting bolt (5) from the direction C, rotating the sliding block adjusting bolt (5) anticlockwise, enabling the sliding block (3) to move downwards and to gradually approach the tile base (10), enabling the distance between the sliding block adjusting bolt (5) and the end face of the hexagon nut (6) to be H, recording the value of H, checking and confirming that the spherical part (4) is attached to the sliding block (3) and the sliding block (3) is attached to the bearing chamber (2), wherein the distance between the sliding block adjusting bolt (5) and the end face of the hexagon nut (6) is H and is more than or equal to 12 mm;
3) the method comprises the following steps of putting a tool sleeve (7) in the middle of a radial tile (13), lightly pressing the tool sleeve (7) to enable the tool sleeve (7) to be in contact with the radial tile (13), plugging one feeler (15) into a gap between the tool sleeve (7) and a cover ring (14) at intervals of 90 degrees from any position by using four feelers (15) with the same thickness, and enabling the tool sleeve (7) to be coaxial with the cover ring (14) after the feelers (15) are placed according to the mode;
4) the sliding block adjusting bolt (5) is seen from the direction C, the sliding block adjusting bolt (5) is rotated clockwise, the sliding block (3) moves upwards and gradually gets away from the tile base (10), the thickness of the contact position of the spherical part (4) and the sliding block (3) is increased, and the radial tile (13) is pushed to approach the tool sleeve (7);
5) while screwing the slide block adjusting bolt (5), measuring whether a clearance A between the tool sleeve (7) and the radial tile (13) meets the requirement that A is 0.04mm by using a feeler gauge (8) with the thickness of 0.04 mm;
when the clearance A is equal to 0.04mm, stopping screwing the slide block adjusting bolt (5), and placing a feeler gauge (8) with the thickness of 0.04mm between the tool sleeve (7) and the radial tile (13) without moving;
6) repeating the step 4) and the step 5), enabling all the sliding blocks (3) to move upwards and gradually get away from the tile base (10), enabling all the radial tiles (13) to approach to the tool sleeve (7), and enabling the clearance A between the tool sleeve (7) and each radial tile (13) to be 0.04 mm; keeping the positions of all the feelers (8) from moving;
7) hold down instrument sleeve (7), take out all clearance gauges (8), see slider adjusting bolt (5) from the C direction, all slider adjusting bolt (5) circles of clockwise rotation, instrument sleeve (7) can be held tightly to each radial tile (13) this moment, screw up hexagon nut (6), make hexagon nut (6) and adjusting screw gasket (9) paste tightly, take out all clearance gauges (15), accomplish the formula adjustment work of holding tightly in radial tile clearance so far.
The working principle of the invention is as follows:
the working process and principle of the invention are that firstly, the wedge-shaped sliding block with small top and big bottom is reduced to the lowest, and the thickness of the sliding block with the height of the spherical part is increased to push the spherical part and the radial tile to move towards the tool sleeve, so that the radial tile gradually holds the tool sleeve. The spherical part is in spherical contact with the radial tile and has a certain degree of rotational freedom, so that the radial tile can freely move on the tile base in a horizontal direction. Then put into radial tile with the instrument sleeve, insert the clearance of cover ring and instrument sleeve with the clearance of the clearance gauge that thickness is the same according to four points evenly arranged's mode, reach instrument sleeve and the coaxial effect of cover ring, reach radial tile and the coaxial effect of cover ring inner circle after the adjustment. Through twisting the synchronous rising slider height of slider adjusting bolt, the slider thickness grow of spherical part place height simultaneously, radial tile and spherical part move to the tool sleeve when can be automatic behind the extrusion force of slider to make radial tile internal diameter diminish gradually, finally make it the same with tool sleeve's external diameter, and tool sleeve's external diameter is final radial tile clearance adjustment size promptly. After reducing the internal diameter of radial tile at every turn, use the clearance of clearance gauge measurement radial tile and toper instrument, the clearance of adjustment radial tile makes its satisfy the requirement, screws up round slider adjusting bolt simultaneously at last, and all radial tiles all inwards move 0.038 ~ 0.04mm to guarantee that all radial tiles are coaxial at last and just hold tightly the instrument sleeve, avoid the atress inequality to lead to instrument sleeve displacement, and then influence radial tile and the telescopic coaxial effect of instrument.
The invention has the technical effects that:
when a shaft system of the nuclear main pump rotates, the shaft system runs in the theoretical running center of the main pump, a motor shaft providing power in the shaft system penetrates through the radial bush and extends to the lower part of the bidirectional thrust bearing, the motor shaft runs in the center of the radial bearing, the center of the radial bearing is in the running center of the main pump, and the coaxiality of the radial bearing and a bearing sleeve on the motor shaft determines whether the center of the motor shaft is accurately positioned in the theoretical running center of the main pump. The odd number of the radial tiles which are distributed asymmetrically are contact parts of the radial bearing and a motor shaft, the clearance between the radial tiles and the bearing sleeve and the coaxiality between the radial tiles determine the coaxiality between the radial tiles and the motor shaft, if the clearance between the radial tiles and the bearing sleeve is not uniform, the radial bearing and the motor shaft are not coaxial, the center of the motor shaft is not positioned at the running center of a main pump, if the center of the motor shaft deviates from the rotating center position of the main pump, the inner circle of the radial tiles is eccentrically ground when a shafting runs, and therefore damage to the radial tiles, generation of metal scraps, abnormal oil temperature and pressure and vibration increase of the main pump or more serious accidents are caused.
The invention creatively adopts the mode of feeler gauge positioning and radial tile holding the tool sleeve tightly, thereby determining the gap between the bearing sleeve and the radial tile and ensuring the radial tiles to be coaxial. The method has the advantages that the inner diameter of the radial tile can be accurately adjusted, and the gap between the radial tile and the bearing sleeve can be accurately controlled, so that the radial tile and the motor shaft are ensured to be coaxial. And secondly, in the step 3), four feelers with the same thickness are required to be plugged into the gap between the tool sleeve and the cover ring in a four-point uniform distribution mode, and the tool sleeve is indirectly used to enable the radial tile and the cover ring to achieve the coaxial effect, so that the operation is simple and convenient, and the data is accurate. And thirdly, after all the radial tiles are adjusted to be 0.04mm away from the tool sleeve, a circle of sliding block adjusting bolts are screwed, the moving distance of the radial tiles is just 0.038-0.04 mm, the error of one circle of rotation is extremely small, and the precision is higher than that of a mode of directly using a feeler gauge to measure the gap, so that the coaxiality between the radial tiles has accurate data, the accuracy of gap adjustment of the radial tiles is improved, and the radial tiles in a traditional method have excessive freedom in a radial bearing and can cause data uncertainty and inaccurate measurement. Fourthly, the method improves the adjusting efficiency and reduces the assembling time due to the accuracy of adjusting the radial tile gap. Fifthly, the method is superior to the traditional method, the radial tile gap can be accurately adjusted by using a simple tool sleeve and a feeler gauge, and the condition that the traditional method is repeatedly operated and cannot accurately adjust the size to cause rework is avoided. Sixthly, due to the fact that the accuracy of the method for adjusting the gap between the radial tiles reduces the vibration value of the whole main pump caused by the fact that the radial tiles and the motor shaft are not coaxial, abrasion of the radial bearing is reduced, the service life is prolonged, and the risk of shutdown of the shaft seal type nuclear main pump is reduced.
Description of the drawings:
FIG. 1 radial bearing Assembly drawing
FIG. 2 schematic diagram of adjusting bolt distance of slider
FIG. 3 is a schematic view of the tool sleeve and radial shoe gap
The specific implementation mode is as follows:
the tightening type adjusting method for the odd number asymmetric radial tile gap of the shaft seal type nuclear main pump is high in reliability, high in precision, high in efficiency and stable in data. In order to achieve the purpose, the scheme is as follows: clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump
As shown in fig. 1, the feeler is positioned to grip the tool sleeve with the radial shoes so as to be coaxial with the radial shoes and determine the clearance between the bearing sleeve and the radial shoes, the method comprising the following steps:
1) and finishing the radial bearing assembly: placing a bearing chamber 2 on a tile base 10, assembling a spherical part 4 and a radial tile 13 together by using a spherical part screw 12, installing an adjusting screw gasket 9 and a hexagon head screw 11 on the tile base 10, installing an assembling slide block 3, a slide block adjusting bolt 5 and a hexagon nut 6 on the bearing chamber 2 and the tile base 10 as shown in figure 1, placing an assembly of the spherical part 4 and the radial tile 13 on the tile base 10, enabling the spherical part 4 and the slide block 3 to be attached as shown in figure 1, enabling the slide block 3 to be attached to the bearing chamber 2, installing a cover ring 14 on the bearing chamber 2 by using an inner hexagon screw 1, and enabling the hexagon nut 6 to be in a loose state;
2) as shown in fig. 2, when the slider adjusting bolt 5 is seen from the direction C, the slider adjusting bolt 5 is rotated counterclockwise, so that the slider 3 moves downward and gradually approaches the tile base 10, the distance between the slider adjusting bolt 5 and the end surface of the hexagon nut 6 is H, the value of H is recorded, the distance between 13mm and H is more than or equal to 12mm, the spherical part 4 and the slider 3 are checked and confirmed to be attached, and the slider 3 and the bearing chamber 2 are attached;
3) as shown in fig. 1, the tool sleeve 7 is placed in the middle of the radial tile 13, the tool sleeve 7 is lightly pressed to make the tool sleeve 7 contact with the radial tile 13, four feelers 15 with the same thickness are used, one feeler 15 is plugged into a gap between the tool sleeve 7 and the cover ring 14 every 90 degrees from any position, and after the feelers 15 are placed in the above manner, the tool sleeve 7 and the cover ring 14 are coaxial;
4) as shown in fig. 2, when the slide adjusting bolt 5 is seen from the direction C, the slide adjusting bolt 5 is rotated clockwise, so that the slide 3 moves upwards and gradually moves away from the shoe base 10, the thickness of the contact position of the spherical part 4 and the slide 3 is increased, and the radial shoe 13 is pushed to approach the tool sleeve 7;
5) as shown in fig. 3, while screwing the slider adjusting bolt 5, a feeler 8 with a thickness of 0.04mm is used to measure whether the gap a between the tool sleeve 7 and the radial shoe 13 satisfies a-0.04 mm;
when the clearance A is equal to 0.04mm, stopping screwing the slide adjusting bolt 5, and placing the feeler 8 with the thickness of 0.04mm between the tool sleeve 7 and the radial tile 13 without moving;
6) repeating the step 4) and the step 5), so that all the sliding blocks 3 move upwards and gradually get away from the tile base 10, all the radial tiles 3 get close to the tool sleeve 7, and the clearance A between the tool sleeve 7 and each radial tile 13 is equal to 0.04 mm; keeping the positions of all the feelers 8 from moving;
7) hold down instrument sleeve 7, take out all clearance gauges 8, see slider adjusting bolt 5 from the C direction, clockwise rotation all slider adjusting bolt 5 rounds, instrument sleeve 7 can be held tightly to each radial tile 13 this moment, screws up hexagon nut 6, makes hexagon nut 6 and adjusting screw gasket 9 paste tightly, takes out all clearance gauges 15, accomplishes the formula adjustment work of holding tightly in radial tile clearance up to this moment.
Claims (1)
1. A holding type adjusting method for odd number asymmetric radial tile gaps of a shaft seal type nuclear main pump is characterized by comprising the following steps: the method of positioning the feeler gauge and tightly holding the tool sleeve by the radial tiles is adopted, so that all the radial tiles are coaxial and the gap between the bearing sleeve and the radial tiles is determined, and the method comprises the following steps:
1) and finishing the radial bearing assembly: placing a bearing chamber (2) on a tile base (10), assembling a spherical part (4) and a radial tile (13) together by using a spherical part screw (12), installing an adjusting screw gasket (9) and a hexagon head screw (11) on the tile base (10), assembling a sliding block (3), a sliding block adjusting bolt (5) and a hexagon nut (6) on the bearing chamber (2) and the tile base (10), placing the assembly of the spherical part (4) and the radial tile (13) on the tile base (10), enabling the spherical part (4) to be attached to the sliding block (3), enabling the sliding block (3) to be attached to the bearing chamber (2), installing a cover ring (14) on the bearing chamber (2) by using an inner hexagon screw (1), and enabling the hexagon nut (6) to be in a loose state;
2) viewing the sliding block adjusting bolt (5) from the direction C, rotating the sliding block adjusting bolt (5) anticlockwise, enabling the sliding block (3) to move downwards and to gradually approach the tile base (10), enabling the distance between the sliding block adjusting bolt (5) and the end face of the hexagon nut (6) to be H, recording the value of H, checking and confirming that the spherical part (4) is attached to the sliding block (3) and the sliding block (3) is attached to the bearing chamber (2), wherein the distance between the sliding block adjusting bolt (5) and the end face of the hexagon nut (6) is H and is more than or equal to 12 mm;
3) the method comprises the following steps of putting a tool sleeve (7) in the middle of a radial tile (13), lightly pressing the tool sleeve (7) to enable the tool sleeve (7) to be in contact with the radial tile (13), plugging one feeler (15) into a gap between the tool sleeve (7) and a cover ring (14) at intervals of 90 degrees from any position by using four feelers (15) with the same thickness, and enabling the tool sleeve (7) to be coaxial with the cover ring (14) after the feelers (15) are placed according to the mode;
4) the sliding block adjusting bolt (5) is seen from the direction C, the sliding block adjusting bolt (5) is rotated clockwise, the sliding block (3) moves upwards and gradually gets away from the tile base (10), the thickness of the contact position of the spherical part (4) and the sliding block (3) is increased, and the radial tile (13) is pushed to approach the tool sleeve (7);
5) while screwing the slide block adjusting bolt (5), measuring whether a clearance A between the tool sleeve (7) and the radial tile (13) meets the requirement that A is 0.04mm by using a feeler gauge (8) with the thickness of 0.04 mm;
when the clearance A is equal to 0.04mm, stopping screwing the slide block adjusting bolt (5), and placing a feeler gauge (8) with the thickness of 0.04mm between the tool sleeve (7) and the radial tile (13) without moving;
6) repeating the step 4) and the step 5), enabling all the sliding blocks (3) to move upwards and gradually get away from the tile base (10), enabling all the radial tiles (13) to approach to the tool sleeve (7), and enabling the clearance A between the tool sleeve (7) and each radial tile (13) to be 0.04 mm; keeping the positions of all the feelers (8) from moving;
7) hold down instrument sleeve (7), take out all clearance gauges (8), see slider adjusting bolt (5) from the C direction, all slider adjusting bolt (5) circles of clockwise rotation, instrument sleeve (7) can be held tightly to each radial tile (13) this moment, screw up hexagon nut (6), make hexagon nut (6) and adjusting screw gasket (9) paste tightly, take out all clearance gauges (15), accomplish the formula adjustment work of holding tightly in radial tile clearance so far.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210121274.0A CN114406954A (en) | 2022-02-09 | 2022-02-09 | Clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210121274.0A CN114406954A (en) | 2022-02-09 | 2022-02-09 | Clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump |
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| CN114406954A true CN114406954A (en) | 2022-04-29 |
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| CN202210121274.0A Pending CN114406954A (en) | 2022-02-09 | 2022-02-09 | Clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153990A (en) * | 1990-03-09 | 1992-10-13 | Reliance Electric Industrial Company | Method for mounting a bearing or other device and tapered adapter onto a shaft |
| CN206683615U (en) * | 2016-12-27 | 2017-11-28 | 内蒙航天动力机械测试所 | Band oscillating bearing engine jet pipe pivot angle calibration zero-bit bar |
| CN210070821U (en) * | 2019-07-02 | 2020-02-14 | 招远市金兴机械制造有限公司 | Bearing detection equipment |
| CN113339313A (en) * | 2021-07-08 | 2021-09-03 | 哈尔滨电气动力装备有限公司 | Centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump |
| CN113524106A (en) * | 2021-07-08 | 2021-10-22 | 哈尔滨电气动力装备有限公司 | Radial tile tool installation process |
-
2022
- 2022-02-09 CN CN202210121274.0A patent/CN114406954A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153990A (en) * | 1990-03-09 | 1992-10-13 | Reliance Electric Industrial Company | Method for mounting a bearing or other device and tapered adapter onto a shaft |
| CN206683615U (en) * | 2016-12-27 | 2017-11-28 | 内蒙航天动力机械测试所 | Band oscillating bearing engine jet pipe pivot angle calibration zero-bit bar |
| CN210070821U (en) * | 2019-07-02 | 2020-02-14 | 招远市金兴机械制造有限公司 | Bearing detection equipment |
| CN113339313A (en) * | 2021-07-08 | 2021-09-03 | 哈尔滨电气动力装备有限公司 | Centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump |
| CN113524106A (en) * | 2021-07-08 | 2021-10-22 | 哈尔滨电气动力装备有限公司 | Radial tile tool installation process |
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