CN219018636U - Center adjusting tool for novel stator core of hydropower plant generator - Google Patents
Center adjusting tool for novel stator core of hydropower plant generator Download PDFInfo
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- CN219018636U CN219018636U CN202223112739.0U CN202223112739U CN219018636U CN 219018636 U CN219018636 U CN 219018636U CN 202223112739 U CN202223112739 U CN 202223112739U CN 219018636 U CN219018636 U CN 219018636U
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Abstract
The utility model relates to a novel stator core center adjusting tool for a hydropower plant generator, which is characterized in that: the device comprises a measuring cylinder arranged on the upper surface of a thrust head of a main shaft of a generator and a supporting frame arranged on the upper surface of a lower stand of the generator, wherein the axial lead of the measuring cylinder is overlapped with the axial lead of the main shaft of the generator; the support frame is hung with a plurality of plumb lines from top to bottom, the lower ends of the plumb lines are connected with heavy weights, the plumb lines are parallel to the axial lead of the measuring cylinder, and in a plane formed by one plumb line and the axial lead of the measuring cylinder, the corresponding plumb lines are equal to the peripheral surface distance of the measuring cylinder; in a plane formed by one plumb line and the axial lead of the thrust head, the corresponding plumb line and the peripheral surface of the thrust head are equally spaced; the upper end surface of the measuring cylinder arranged on the thrust head is higher than the stator core of the generator. The utility model is beneficial to reducing the overhaul workload and the overhaul cost.
Description
Technical field:
the utility model relates to a novel stator core center adjusting tool for a hydropower plant generator.
The background technology is as follows:
the total installed capacity of the Fujian Shaxi hydroelectric plant is 300MW, and the total installed capacity is 4 75MW axial flow rotating paddle hydroelectric generating sets, belonging to a large axial flow rotating paddle generating set; model ZZF-LH-800 of water turbine, diameter of the runner is 8 meters, the weight of the runner is 220 tons, and the number of the runner blades is 5; it belongs to a vertical full umbrella-type structure hydroelectric generating set; generator model SF75-80/13000; rotor diameter phi 12.416 meters, stator outer diameter phi 13.04 meters; the air gap between the stator and the rotor of the generator is 16mm, the weight of the rotor is 380 tons, the weight of the stator is 370 tons, and the rotating speed is 75rpm; the hydroelectric generating set of the shaxi mouth hydroelectric generating set has the characteristics of large stator and rotor diameters, large runner diameter and heavy weights of the runner, the stator and the rotor, and the overall structure of the hydroelectric generating set of the Fujian shaxi mouth hydroelectric generating set is shown in figure 1.
According to technical specifications, the hydroelectric generating set of the Fujian shaxi hydroelectric generating set needs to be overhauled regularly, overhauls at different levels are different in components needing to be disassembled and assembled, wherein when overhauling at level B, only the upper frame and the generator rotor of the generating set are needed to be lifted out, when overhauling at level A of the generating set, besides the upper frame and the generator rotor of the generating set, the lower frame, the generator main shaft, the thrust head, the water turbine main shaft and the like are needed to be lifted out, the disassembly and lifting workload is greatly increased compared with that of overhauling at level B, and the overhauling cost is greatly increased.
When the B-stage overhaul of a recent unit is carried out, the stator is aligned according to the actual central line of a turbine runner chamber in GB/T8564-2003 ' technical specification for installing a hydroelectric generating set ', the requirement of measurement cannot be met under the condition that the upper frame of the generating set is lifted out and the rotor of a generator is lifted out according to the B-stage overhaul, the A-stage overhaul is required, the current overhaul state of the B-stage overhaul of the unit is carried out, the new stator replacement and adjustment of the generator are carried out under the condition that the rotor of the generator is not lifted out and the rotor of the generator is lifted out, the overhaul workload is reduced, the overhaul process is optimized, and the aim of various technical requirements of GB/T8564-2003 ' technical specification for installing the hydroelectric generating set is fulfilled.
The utility model comprises the following steps:
in view of the problems, the utility model provides a novel center adjustment tool for a stator core of a hydroelectric generator, which is beneficial to reducing overhaul workload and overhaul cost.
The utility model is realized by adopting the following scheme,
the utility model relates to a novel stator core center adjusting tool for a hydropower plant generator, which is characterized in that: the device comprises a measuring cylinder arranged on the upper surface of a thrust head of a main shaft of the generator and a supporting frame arranged on the upper surface of a lower stand of the generator, wherein the axial lead of the measuring cylinder is overlapped with the axial lead of the main shaft of the generator; the support frame is hung with a plurality of plumb lines from top to bottom, the lower ends of the plumb lines are connected with heavy weights, the plumb lines are parallel to the axial lead of the measuring cylinder, and in a plane formed by one plumb line and the axial lead of the measuring cylinder, the corresponding plumb lines are equal to the peripheral surface distance of the measuring cylinder; in a plane formed by one plumb line and the axial lead of the thrust head, the corresponding plumb line and the peripheral surface of the thrust head are equally spaced; the upper end surface of the measuring cylinder arranged on the thrust head is higher than the stator core of the generator.
Furthermore, four plumb lines are uniformly distributed in the circumferential direction of the measuring cylinder.
Further, the plumb line is a piano line.
Further, the supporting frame comprises four vertical rods and a rectangular frame vertically fixed at the upper end of the vertical rods, the rectangular frame comprises four side strips connected to form a rectangle and two diagonal strips connected to two opposite angles of the rectangle, and the upper end of a plumb line is connected to the diagonal strips.
Further, the measuring cylinder is a cylinder made of metal.
Further, the upper surface and the outer peripheral surface of the measuring cylinder are fixedly provided with a plurality of bolts.
The utility model relates to a novel stator core center adjusting process of a hydropower plant generator, which is characterized by comprising the following steps of:
the method comprises the following steps:
1) Fixing the axis of the rotating part of the generator set;
2) Hanging an upper frame of the generator and a generator rotor;
3) Placing a measuring cylinder on the upper surface of a thrust head of a main shaft of the generator;
4) Placing a supporting frame on the upper surface of a lower stand of the generator and hanging four plumb lines from top to bottom on the supporting frame;
5) The positions of the four plumb lines are adjusted, so that the distance between one plumb line and the peripheral surface of the thrust head is equal in a plane formed by the axis of the thrust head and the corresponding plumb line;
6) The position of the measuring cylinder on the upper surface of the thrust head is regulated to enable the axial lead of the measuring cylinder to coincide with the axial lead of the main shaft of the generator, and meanwhile, one plumb line and the axial lead of the measuring cylinder form a plane, and the corresponding plumb line and the peripheral surface of the measuring cylinder are equal in interval;
7) Removing the support frame and plumb line;
8) And replacing the new stator core of the generator, and adjusting the position of the new stator core of the generator to ensure that the distances from the center of the new stator core to the outer peripheral surface of the measuring cylinder are equal, and the measuring error is controlled within 0.05 mmn.
Furthermore, the axis of the rotating part of the generator set is fixed in the step 1), and the shaft collar is tightly jacked by four guide shaft tiles at the lower guide bearing of the generator and the water guide bearing of the water turbine.
Further, the step 5) is realized by measuring the distance between each plumb line and the outer peripheral surface of the thrust head by an inside micrometer, and when the distance between one plumb line and the outer peripheral surface of the thrust head is unequal in a plane formed by the axis of one plumb line and the axis of the thrust head, the position of the corresponding plumb line on the supporting frame is adjusted until the distance between each plumb line and the outer peripheral surface of the thrust head is equal; and 6) measuring the distance between each plumb line and the outer circumferential surface of the measuring cylinder by using an inside micrometer, and adjusting the position of the measuring cylinder on the upper surface of the thrust head until the distance between each plumb line and the outer circumferential surface of the measuring cylinder is equal when the distance between the corresponding plumb line and the outer circumferential surface of the measuring cylinder is unequal in a plane formed by the plumb line and the axial lead of the measuring cylinder.
Further, in the step 8), the distance between the inner side surface of the new stator core and the outer circumferential surface of the measuring cylinder is equal in a plurality of vertical surfaces of the axial lead of the measuring cylinder measured by the inside micrometer, and when the measured distance value is not equal, the position of the new stator core is adjusted until the distance between the inner side surface of the new stator core and the outer circumferential surface of the measuring cylinder is equal in a plurality of vertical surfaces of the axial lead of the measuring cylinder.
The center adjustment tool for the novel stator core of the hydropower plant generator has the advantages that:
by adopting the process, only the upper frame and the generator rotor of the generator set are required to be disassembled, and equipment such as a generator main shaft, a thrust head, a lower frame, a thrust bearing, a water turbine main shaft and the like are not required to be disassembled, so that the working procedures of maintenance operation are greatly reduced, the working procedures of maintenance operation are reduced by more than 200, the maintenance and material cost is greatly reduced by 150 ten thousand, the maintenance, test and material cost of the unit B level is 200 ten thousand, and the maintenance, test and material cost of the unit A level is 350 ten thousand.
Description of the drawings:
the utility model is further described below with reference to the accompanying drawings;
FIG. 1 is a schematic view of a front sectional configuration of a hydroelectric power plant generator;
FIG. 2 is a schematic view of the construction with the upper housing, rotor, and down-guide bearings of the generator removed;
a1-an oil receiver; a21-stator; a22-rotor; a3-a runner body; a4-upper rack; a5-a thrust head; a6-a lower guide bearing; a7-a lower rack; a8-a water guide bearing; a9- -thrust bearing; a10-flange;
FIG. 3 is a schematic view of the construction of the mounting cylinder and support frame of FIG. 2;
FIG. 4 is a partial view of FIG. 3;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic diagram of the construction of a new stator for tooling inspection according to the present utility model;
FIG. 7 is a top view of FIG. 6;
fig. 8 is a front view of the test cylinder.
The specific embodiment is as follows:
the utility model is further described below with reference to the drawings and the detailed description.
The utility model relates to a novel stator core center adjusting tool for a hydroelectric power plant generator, which comprises a measuring cylinder 1 arranged on the upper surface of a thrust head A5 of a main shaft of the generator, wherein the measuring cylinder is made of metal, the cylindricity, coaxiality and verticality of upper and lower end surfaces and a shaft axis of the measuring cylinder reach high-precision standards, and the upper end surface of the measuring cylinder arranged on the thrust head is higher than a core of a stator A21 of the generator.
The support frame 2 is placed on the upper surface of the lower stand A7 of the generator, the support frame 2 comprises four vertical rods 201 and a rectangular frame 202 vertically fixed at the upper end of the vertical rods, the rectangular frame comprises four side bars 203 connected to form a rectangle and two diagonal bars 204 connected to two opposite angles of the rectangle, the upper end of a plumb line is connected to the diagonal bars 204, and the vertical rods 201, the side bars 203 and the diagonal bars 204 can be made of round steel pipes, square steel pipes or channel steel.
The supporting frame 2 is suspended with a plurality of plumb lines 3 from top to bottom, the lower ends of the plumb lines are connected with heavy weights 4, the plumb lines can be piano lines, steel wires or fish lines and the like, as long as the plumb lines can be kept vertical under the gravity action of the heavy weights 4, the heavy weights 4 can be stone blocks, iron blocks or stainless steel blocks and the like, and the upper ends of the plumb lines 3 can be sleeved on the diagonal strips 204.
The position of the measuring cylinder is required, namely, the axial lead of the measuring cylinder is required to be coincident with the axial lead of the main shaft of the generator, in order to realize the coincidence of the axial lead of the measuring cylinder and the axial lead of the main shaft of the generator, the first step is to ensure that the distance between one plumb line 3 and the peripheral surface of the thrust head (the length of a broken line in fig. 4) is equal; the second part is to ensure that in the plane formed by one of the plumb lines and the axis of the measuring cylinder, the corresponding plumb line is equidistant from the outer circumferential surface of the measuring cylinder (the length of the broken line in fig. 4).
The first step can be implemented by measuring the distance between each plumb line and the outer peripheral surface of the thrust head by an inside micrometer, and when the distance between one plumb line and the outer peripheral surface of the thrust head is unequal in a plane formed by the axis line of one plumb line and the axis line of the thrust head, adjusting the position of the corresponding plumb line on the supporting frame until the distance between each plumb line and the outer peripheral surface of the thrust head is equal, and then implementing the second step.
And in the second step, the distance between each plumb line and the outer peripheral surface of the measuring cylinder can be measured through an inside micrometer, and when the distance between one plumb line and the outer peripheral surface of the measuring cylinder is unequal in a plane formed by the axis of the measuring cylinder and the corresponding plumb line, the position of the measuring cylinder on the upper surface of the thrust head is adjusted until the distance between each plumb line and the outer peripheral surface of the measuring cylinder is equal.
The two to three measuring points in the vertical direction are required (i.e. the broken line shown in fig. 4, of course, the measurement of a plurality of points is beneficial to improving accuracy), and when the two to three measuring points in the vertical direction are required, the coincidence (i.e. coaxiality) of the axial lead of the measuring cylinder and the axial lead of the main shaft of the generator can be ensured, and after the coaxiality is ensured, the reference guarantee can be provided for the detection after the replacement of a new stator.
For reasonable in design, the circumference equipartition of above-mentioned survey cylinder is equipped with three plumb lines at least, of course more plumb lines, has more check points promptly, just also improves the detection accuracy, but has also increased the work load that detects, and this application adopts four plumb lines to carry out the detection.
In order to adjust the position of the measuring cylinder on the upper surface of the thrust head A5, a plurality of bolts 5 are fixedly arranged on the upper surface and the outer peripheral surface of the measuring cylinder, the corresponding bolts are pulled by a pull rope or a lifting rope to realize the movement or swing of the measuring cylinder, the perpendicularity of the bolts (2M 16) on the upper surface of the measuring cylinder is preferably adjusted, and the centrality of the bolts (8M 10) in four symmetrical directions of the upper and lower X, Y of the side surface of the measuring cylinder is preferably adjusted.
Because the upper surface of the thrust head A5 cannot ensure better flatness, the measuring cylinder may have inclination, and a sheet may be plugged at a side position between the lower end surface of the measuring cylinder and the upper surface of the thrust head at this time, so as to realize alignment of the measuring cylinder.
In order to prevent the rotation of the main shaft and the thrust head of the generator during detection, a top block 6 can be tightly pressed between the thrust head A5 and the thrust bearing A9 or between the thrust head A5 and the lower frame A7, and the top block 6 can be a wood block, a metal block, a guide bush or the like.
The utility model relates to a novel stator core center adjusting process of a hydropower plant generator,
the method comprises the following steps:
1) The axis of the rotating part of the generator set can be fixed and arranged between the thrust head A5 and the thrust bearing A9 or between the thrust head A5 and the lower frame A7 through the jacking block 6; four guide shaft tiles can also be used for tightly supporting the shaft collar at the water guide bearing of the water turbine;
2) The generator upper frame and the generator rotor are hung, and the generator rotor can be lifted out through a bridge crane;
3) Placing a measuring cylinder on the upper surface of a thrust head of a main shaft of the generator;
4) Placing a supporting frame on the upper surface of a lower stand of the generator and hanging four plumb lines from top to bottom on the supporting frame;
5) The positions of the four plumb lines are adjusted, so that the distance between one plumb line and the peripheral surface of the thrust head is equal in a plane formed by the axis of the thrust head and the corresponding plumb line;
this step may be accomplished by measuring the spacing between each plumb line and the outer peripheral surface of the thrust collar by an inside micrometer, and adjusting the position of the corresponding plumb line on the support frame when the spacing between one of the plumb lines and the outer peripheral surface of the thrust collar (the length of the dashed line in fig. 4) is unequal in the plane formed by the axes of the plumb lines and the thrust collar until the spacing between each plumb line and the outer peripheral surface of the thrust collar is equal.
6) The position of the measuring cylinder on the upper surface of the thrust head is regulated to enable the axial lead of the measuring cylinder to coincide with the axial lead of the main shaft of the generator, and meanwhile, one plumb line and the axial lead of the measuring cylinder form a plane, so that the corresponding plumb line and the peripheral surface of the measuring cylinder are equal in interval;
the step can be used for measuring the distance between each plumb line and the outer circumferential surface of the measuring cylinder through an inside micrometer, and when the distance between one plumb line and the outer circumferential surface of the measuring cylinder (the length of a broken line shown in fig. 4) is unequal in a plane formed by the axis line of one plumb line and the axis line of the measuring cylinder, the position of the measuring cylinder on the upper surface of the thrust head is adjusted until the distance between each plumb line and the outer circumferential surface of the measuring cylinder is equal.
7) Removing the support frame and plumb line;
8) And replacing the new stator core of the generator, and adjusting the position of the new stator core of the generator to ensure that the distances from the center of the new stator core to the outer peripheral surface of the measuring cylinder are equal, and the measuring error is controlled within 0.05 mmn.
The step can be measured by an inside micrometer, the distance between the inner side surface of the new stator core and the outer peripheral surface of the measuring cylinder is equal in a plurality of vertical surfaces of the axial lead of the overstock cylinder, and when the measured distance value (the length of a broken line shown in fig. 6 and 7) is unequal, the position of the new stator core is adjusted until the distance between the inner side surface of the new stator core and the outer peripheral surface of the measuring cylinder is equal in a plurality of vertical surfaces of the axial lead of the overstock cylinder.
Preparation work for implementing the process of the utility model:
1. stress adjustment and axial pushing center for unit rotating part
1) Under the condition that the rotating wheel body is not hung out in the overhaul of the unit B level, the rotating wheel and the rotating part of the generator rotor of the water turbine are taken as the centers, and the unit B level is implemented under the condition that the bearing force of the thrust bearing is adjusted to be qualified and the axis of the rotating part pushes the center position;
2) The speed regulator regulates the turbine runner blade to a full-open position (+20 degrees);
3) Before the generator rotor is not dismantled, the level of a generator mirror plate of the unit is adjusted to be within 0.02mm/m, and the compression quantity qualified range of a thrust bearing 12-block thrust tile elastic oil tank is adjusted to be within 0.20 mm;
4) The generator lower guide bearing bush is utilized to push the axis of the rotating part of the unit to be adjusted to the central position;
5) Measuring gaps between five blades of the turbine runner and a runner chamber, and ensuring that the gaps between each blade and the runner chamber do not exceed an average gap value of +/-20%;
6) Measuring the air gaps of a stator and a rotor of the generator, and ensuring that the air gaps of the upper end and the lower end of the stator and the rotor of the generator do not exceed an average gap value of +/-8 percent (the overstand points of individual reasons such as roundness are negligible);
7) Considering the inclination value of the water turbine shaft, installing a unit shaft line turning gear at the center of an upper frame of the generator, and fixing the axis of a unit rotating part at a lower guide bearing of the generator by using a guide shaft bush;
8) And (3) taking the average 72 degrees as a reference, slowly rotating the runner blades of the water turbine for 360 degrees (including rotating to 180 degrees at a symmetrical position), respectively measuring the gaps of the runner blades and the stator and rotor air gaps of the generator, and checking that the gaps meet technical requirements (the gaps between the blades and the runner chamber do not exceed an average gap value +/-20%, and the upper and lower end air gaps of the stator and rotor of the generator do not exceed an average gap value +/-8%).
The utility model has the following specific implementation and test effects:
the method is characterized in that the level adjustment of a generator mirror plate of a Fujian Shaxi power plant # 2 unit is qualified in 9 months of 1.20 years, the compression amount of a thrust bearing 12-block thrust tile elastic oil tank is qualified in adjustment, the level of the lens plate of the adjusting machine is within 0.02mm/m, and the difference between the maximum value and the minimum value of the compression amount of each elastic oil tank is smaller than 0.20mm.
2.20 years for 1-3 days in 10 months, pushing the center of the axis of the rotating part of the #2 unit, measuring the gap between the runner blades and the runner chamber of the water turbine, and measuring the air gap between the stator and the rotor of the generator; and adjusting the gaps between the runner blades and the runner chamber and the gaps between the stator and the rotor of the generator to a qualified range.
2.1 the gap between the five blades of the turbine runner and the runner chamber is not more than 20% of the average gap value.
2.2, the air gaps at the upper end and the lower end of the stator and the rotor of the generator do not exceed the average gap value of +/-8 percent.
3. And taking the average 72 degrees as a reference, slowly rotating the runner blades of the water turbine for 360 degrees (including rotating to a symmetrical position of 180 degrees), respectively measuring the gaps of the runner blades and the stator and rotor air gaps of the generator, and checking that the gaps are qualified.
4. And after the axial center of the rotating part of the unit moves to be qualified, fixing the rotating part of the unit, respectively using four guide shaft tiles to tightly press the shaft collar at the lower guide bearing of the generator and the guide bearing of the water turbine, and detecting the position by using a dial indicator when the shaft collar is tightly pressed, so that the large shaft is ensured not to move.
And 5.20, 10 months and 4 days in the year, and the frame on the #2 generator set is disassembled and lifted out.
And 6.20, 10 months and 6 days in the year, the motor rotor of the #2 unit is disassembled and lifted out.
And 7.20 years for 8-12 months, wherein a measuring cylinder is arranged on the upper surface of the thrust head of the #2 generator set, the center of the measuring cylinder is adjusted according to the center of the axis of the rotating part, and the deviation between the measuring cylinder and the center of the axis of the rotating part of the generator set is not more than 0.03mm.
And 8.20 years for 10 months and 18 days, measuring the old stator core center of the #2 generator set according to the center of the measuring cylinder, wherein the center data of the old stator core is only used as a reference for adjusting the center of the new stator core.
9.20 years, 10 months, 19-23 days, and replacing a new stator.
And the new stator core center of the #2 generator set is adjusted to be qualified according to the center of the cylinder to be measured, 16 points are uniformly distributed on the upper, middle and lower sections of the new stator core of the generator respectively, and the data deviation value between the new stator core and the center of the cylinder to be measured is smaller than 0.30mm in 10.20 months to 24-26 days.
When the rotor of the #2 generator is hung in the center, the upper end air gap and the lower end air gap between the stator and the rotor are measured, and the difference between each gap and the average gap is not more than +/-8% of the average gap value.
12. Aiming at the current overhaul state of the level B overhaul of the #2 machine, the #2 machine performs the measurement, adjustment and implementation of the center of a new stator core of the generator under the conditions of not lifting out the runner body, only lifting out the rotor of the generator and the level B overhaul, the new stator core reaches the requirement rule (the stator is aligned according to the actual center line of the runner chamber of the water turbine, and the difference between each radius and the average radius is measured in the same section of assembly and does not exceed +/-4% of the designed air gap in GB/T8564-2003 technical Specification for the installation of the water turbine generator set 9.5.3). ).
The application of the utility model achieves the remarkable effects that:
1) During the B-stage overhaul of the #2 generator set of the Fujian Shaxi electric power plant, the #2 generator stator reconstruction construction is successfully applied to the overhaul reconstruction process by carrying out the new stator reconstruction core center adjustment process of the generator under the conditions of not hanging the rotating wheel and only hanging the rotor, the technical index meets the 9.5.3 clause requirement of the hydroelectric generating set installation technical specification (GB/T8564-2003), the air gaps at the upper end and the lower end of the stator and the rotor of the generator do not exceed the average gap value +/-8 percent, and the average center deviation between the new stator core of the generator and the average center of the rotating wheel chamber of the water turbine is controlled to be less than 0.30mm.
2) And the B-stage overhaul and stator reconstruction period of the #2 unit are shortened by 30 days.
3) 15 major working procedures of overhaul are reduced, more than 200 general working procedures of overhaul are reduced, and overhaul transformation working risks are reduced.
4) 150 ten thousand of overhauling and reforming costs are saved for the company.
5) The application effect is excellent, the optimized maintenance process is improved, the operation safety is improved, the maintenance intensity is greatly reduced, and the technical indexes reach the purpose of installation specification requirements.
The innovation points and effects of the utility model are summarized:
1. the center of the iron core is adjusted by reforming the stator of the generator, and only the rotor of the generator is required to be disassembled, so that the runner of the water turbine is not required to be disassembled.
2. The traditional process for aligning the stator core of the generator according to the actual center line of the runner chamber of the water turbine is broken through, the technical difficulties of measuring and aligning the center of the stator core with the ultra-large inner diameter by using a piano wire are solved, the measuring and adjusting errors (the inner diameter measurement between a measuring cylinder and the iron core, the inner diameter measurement between the piano wire and the iron core, and the measuring accuracy is higher and more convenient) are avoided
3. The generator mirror plate is adjusted horizontally, the thrust bearing force is adjusted to be qualified, the air gaps of the runner blades and the stator and rotor are adjusted to be qualified, and the axis of the rotating part of the unit is fixed.
4. The special tool for measuring the cylinder is innovatively manufactured and is arranged on the upper surface of the thrust head.
5. Measuring and adjusting the center of the new stator core to be qualified by measuring the center of the cylinder; the technical requirement (measured on the same section of assembly, the difference between each radius and the average radius should not exceed +/-4% of the designed air gap) of 9.5.3 clause of the installation technical specification (GB/T8564-2003) of the water turbine generator set is basically met, and the deviation value between the center of the novel stator core and the center of the rotating wheel chamber of the water turbine is less than 0.30 mm.)
6. The method shortens the overhaul reconstruction period, greatly reduces overhaul reconstruction procedures, reduces reconstruction overhaul operation risks and greatly saves overhaul reconstruction cost.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (8)
1. A novel stator core center adjustment frock of hydroelectric power plant's generator, its characterized in that: the device comprises a measuring cylinder arranged on the upper surface of a thrust head of a main shaft of the generator and a supporting frame arranged on the upper surface of a lower stand of the generator, wherein the axial lead of the measuring cylinder is overlapped with the axial lead of the main shaft of the generator; the support frame is hung with a plurality of plumb lines from top to bottom, the lower ends of the plumb lines are connected with heavy weights, the plumb lines are parallel to the axial lead of the measuring cylinder, and in a plane formed by one plumb line and the axial lead of the measuring cylinder, the corresponding plumb lines are equal to the peripheral surface distance of the measuring cylinder; in a plane formed by one plumb line and the axial lead of the thrust head, the corresponding plumb line and the peripheral surface of the thrust head are equally spaced; the upper end surface of the measuring cylinder arranged on the thrust head is higher than the stator core of the generator.
2. The center adjustment tooling for a new stator core of a hydroelectric generator according to claim 1, wherein: four plumb lines are uniformly distributed on the circumference of the measuring cylinder.
3. The hydroelectric power plant generator new stator core center adjustment tooling according to claim 1 or 2, wherein: the plumb line is a piano line.
4. The center adjustment tooling for a new stator core of a hydroelectric generator according to claim 3, wherein: the support frame comprises four vertical rods and a rectangular frame vertically fixed at the upper end of the vertical rods, the rectangular frame comprises four side bars connected to form a rectangle and two diagonal bars connected to two opposite angles of the rectangle, and the upper end of a plumb line is connected to the diagonal bars.
5. The center adjustment tooling for a new stator core of a hydroelectric generator according to claim 4, wherein: the measuring cylinder is a cylinder made of metal.
6. The center adjustment tooling for a new stator core of a hydroelectric generator according to claim 5, wherein: the upper surface and the outer peripheral surface of the measuring cylinder are fixedly provided with a plurality of bolts.
7. The center adjustment tooling for a new stator core of a hydroelectric generator of claim 6, wherein: the upper surface of the measuring cylinder is provided with 2M 16 bolts, and 8M 10 bolts are uniformly distributed on the upper circle and the lower circle of the outer peripheral surface of the measuring cylinder.
8. The center adjustment tooling for a new stator core of a hydroelectric generator according to claim 1, wherein: a mirror plate is arranged between the thrust head and the thrust bearing, and a lower guide bearing is arranged between the thrust head and the lower frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223112739.0U CN219018636U (en) | 2022-11-23 | 2022-11-23 | Center adjusting tool for novel stator core of hydropower plant generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223112739.0U CN219018636U (en) | 2022-11-23 | 2022-11-23 | Center adjusting tool for novel stator core of hydropower plant generator |
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| CN219018636U true CN219018636U (en) | 2023-05-12 |
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| CN202223112739.0U Active CN219018636U (en) | 2022-11-23 | 2022-11-23 | Center adjusting tool for novel stator core of hydropower plant generator |
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| Country | Link |
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| CN (1) | CN219018636U (en) |
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- 2022-11-23 CN CN202223112739.0U patent/CN219018636U/en active Active
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