CN116890221A - Disposable installation and positioning process for water guide mechanism with rotating wheel of water turbine - Google Patents
Disposable installation and positioning process for water guide mechanism with rotating wheel of water turbine Download PDFInfo
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- CN116890221A CN116890221A CN202310728495.9A CN202310728495A CN116890221A CN 116890221 A CN116890221 A CN 116890221A CN 202310728495 A CN202310728495 A CN 202310728495A CN 116890221 A CN116890221 A CN 116890221A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000009434 installation Methods 0.000 title claims abstract description 47
- 230000007246 mechanism Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000001133 acceleration Effects 0.000 abstract 1
- 238000011900 installation process Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/10—Aligning parts to be fitted together
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Mechanical Engineering (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a one-time installation and positioning process for a water guide mechanism with a rotating wheel of a water pump hydroelectric generator. The technology omits the prior preassembling technology for installing the conventional water guide mechanism, and adopts the one-time installation and positioning technology of the water guide mechanism with the rotating wheel, thereby being an innovation of the water turbine installation technology method. The one-time installation positioning process for the water guide mechanism with the rotating wheel of the water turbine has the characteristics of high installation precision, reduction of construction difficulty, acceleration of construction period, energy conservation, emission reduction and the like, avoids potential construction safety hazards caused by repeated assembly, disassembly and hoisting of large parts of the water turbine, generates better economic and social benefits, and has higher popularization and application values.
Description
Technical Field
The invention relates to a one-time installation and positioning process for a water guide mechanism with a rotating wheel of a water turbine, and belongs to the technical field of installation of hydroelectric generating sets and water pump hydroelectric generating motor sets.
Background
In the installation process of the water guide mechanism of the water pump turbine, the conventional water guide mechanism is installed after the water guide mechanism is preassembled and qualified. Because the size of the upper opening of the pit liner of the water pump hydroelectric generating set is smaller, the top cover must be split-hung into the pit for assembly, and the movable guide vane must be hung into the pit from the central hole of the top cover after the top cover is assembled into a whole to be hung above the pit. The water guide mechanism is preassembled conventionally, after the preassembling is qualified, the top cover is required to be lifted again and hung above the pit to remove the movable guide vane, then the top cover is installed to form a temporary buttress, and then the top cover is placed on the buttress to remove the top cover and lift the top cover out of the pit in a split manner. When the water guide mechanism is formally installed, the rotating wheel is firstly hung into the pit for installation, adjustment and fixation, then hung into the upper leakage stop ring, and then the procedures of split top cover hanging into the pit for assembly and hanging, movable guide vane installation, top cover installation and the like are respectively completed according to the preassembling step of the water guide mechanism. The conventional water guide mechanism is complicated in installation procedure, the top cover needs to be assembled and disassembled twice, the space size of a water turbine pit is small, the assembly and disassembly difficulty of a large top cover part is large, time and labor are consumed, and the construction potential safety hazard is high.
Disclosure of Invention
In order to solve the technical problems, the invention provides a one-time installation and positioning process for the water guide mechanism with the rotating wheel, which improves the working efficiency, reduces the installation period of the water guide mechanism and saves the construction cost.
The technical scheme of the invention comprises the following steps:
1) The method comprises the steps that (S1) after site processing of a water turbine seat ring is completed and cleaned, bottom ring installation is carried out, the bottom ring is concentrically adjusted by taking the center of the seat ring as a reference, the azimuth of the bottom ring is consistent with that of the seat ring, and after the center and the azimuth are adjusted to be qualified, the bottom ring is fastened with the seat ring through bolts;
2) The method comprises the steps of (1) installing a bottom ring, fixing the bottom ring, then carrying out cone pipe installation, secondary concrete pouring and grouting (S2), wherein the center of the cone pipe is concentrically adjusted by taking the center of the bottom ring as a reference, the azimuth of the cone pipe is consistent with the azimuth adjustment of a seat ring, the gap between the upper and lower annular seams of the cone pipe is adjusted to the design requirement, the gap outside the annular seams is plugged, the secondary concrete pouring and grouting are carried out after the welding of the upper annular seam of the cone pipe, and the welding is carried out after the secondary concrete pouring and grouting of the lower annular seam of the cone pipe;
3) The method comprises the steps that (1) after pouring and grouting (S2) of taper pipes and secondary concrete are completed, lower leakage-stopping rings are installed (S3), the centers of the lower leakage-stopping rings are adjusted to be concentric by taking the centers of the bottom rings as references, the positions of the lower leakage-stopping rings are consistent with those of the bottom rings, and bolts are used for fastening and fixing the bottom rings after the centers and the positions are adjusted to be qualified;
4) The unit installation center calibration (S4) is the core of a one-time installation positioning technology of the water guide mechanism with the rotating wheel, the unit installation center calibration is to take the following leak-proof ring as a center reference, and the center reference is led to the positions of the pit lining and the bottom ring leak-off ring for identification, so that center conversion is completed;
5) After the unit center calibration (S4) is finished, hanging the rotating wheel into a machine pit for adjustment and fixation (S5), determining the temporary installation elevation of the rotating wheel according to the sum of the sizes of the turbine shaft and the generator shaft spigot and the coupling gap before hanging the rotating wheel, adjusting concentricity of the center of the rotating wheel by taking the unit installation center calibration (S4) as a reference, adjusting the center of the rotating wheel and the elevation to be qualified, and hanging the upper leakage-stopping ring on the rotating wheel for placement after reliably fixing the rotating wheel;
6) After the top cover is cleaned between plant installations, hanging the split top cover into a pit for assembly and lifting (S6), wherein the split top cover is hung into the pit for assembly into a whole through a combined bolt and then is provided with a leakage stop ring, and then a plant bridge machine is used for lifting the top cover and hanging the top cover above a water turbine chamber through a special tool to complete bearing installation in all movable guide vanes;
7) The movable guide vanes are cleaned before being installed (S7), the movable guide vanes are hung into a pit one by one through guide vane special tools to be installed in place, and sealing elements are installed before the movable guide vanes are installed in place;
8) After the movable guide vanes are all installed (S7) in place, hanging the top cover in place by using a factory bridge machine, and then installing, adjusting and fixing the top cover (S8); the center of the top cover and the center calibration (S4) of the unit are used as reference adjustment concentricity, the azimuth of the top cover is consistent with the azimuth adjustment of the seat ring, after the top cover is adjusted to be qualified, a clearance gauge is used for checking the total clearance of the end face of each movable guide vane to meet the design requirement, and after the top cover is checked to be qualified, a top cover and a seat ring are installed to tightly fix a closing bolt;
9) After the top cover is installed to be qualified, movable guide vane bearings are installed (S9), the guide vane end face gaps are inspected to be qualified again after all guide vane bearings are installed, the opening torsion force of each guide vane is inspected (S91) flexibly by using a chain block, a tension meter, a special tool and the like, and dumpling drilling and positioning are performed on the top cover and bearing pins (S92) after the guide vane bearings are installed and inspected;
10 After the guide vane bearing is installed (S9), other parts of the water guide mechanism are installed (S10).
Further, the axis direction of the bottom ring is required to be adjusted to coincide with the axis direction of the seat ring, and the direction deviation is preferably less than or equal to 1mm; the concentricity deviation is less than or equal to 0.05mm; the radial levelness deviation of the bottom ring is less than or equal to 0.02mm/m.
Further, the concentricity deviation of the lower leakage stop ring and the bottom ring is less than or equal to 0.05mm; the difference between the radius of each step of the leakage stop ring and the average radius should not exceed +/-10% of the designed gap of the leakage stop ring.
Furthermore, the calibration deviation of the installation center of the unit is less than or equal to 0.05mm.
Further, the center deviation of the rotating wheel is less than or equal to 0.05mm, and the levelness deviation of the rotating wheel is less than or equal to 0.02mm/m; the rotating wheel and the bottom ring are tightly fixed by eight copper wedge plates, the rotating wheel is monitored by a dial indicator to avoid displacement in the tightening process of the wedge plates, and the clearance between the rotating wheel at the positions of the eight wedge plates is checked by a feeler gauge and recorded.
Further, after the top cover is installed, the center difference is smaller than or equal to 0.05mm, the top cover azimuth deviation is smaller than or equal to 1mm, and the gap between the large end surface and the small end surface of the movable guide vane is checked to be free from regular inclination.
Further, the single movable vane torque is preferably not more than 60% of the average torque of all movable vanes.
The invention has the beneficial effects that:
1. the lower leakage stopping ring is used as a unit installation center reference part, a one-time installation positioning process of the water guide mechanism with the rotating wheel is adopted, the rotating wheel is hung into a machine pit to shield the lower leakage stopping ring, and unit center calibration is to convert the center reference of the lower leakage stopping ring into the position of the machine pit lining and the position of the bottom ring leakage surface, so that the installation center positioning of subsequent parts is facilitated. The invention converts the center reference into two positions as 'one master and one slave', and also is more suitable as 'one master and one slave', so as to ensure the reliability of the converted center.
2. The split top cover is hung into the pit to be assembled and constructed with great difficulty, the number of bolts for combining the top cover and the surface is large, and the assembly period of the top cover is long. The water guide mechanism is provided with the rotating wheel for one-time installation and positioning, so that the secondary disassembly and assembly of the top cover and the lifting in and out of the top cover are avoided, the installation process of the water guide mechanism is greatly simplified, the construction difficulty is reduced, and more time is won for the assembly of the unit.
3. The top cover is hung above the pit to cause narrow space in the pit, the movable guide vane is positioned from the center Kong Diaozhuang of the top cover, the guide vane is difficult and time-consuming to hoist in place, the movable guide vane is prevented from being secondarily hoisted in and out by adopting a one-time installation positioning process of the guide vane with the rotating wheel, the installation process of the guide vane is simplified, and the construction difficulty is reduced.
4. The turbine runner and the top cover are both centered on the unit center calibration point, and the center deviation of the two parts is consistent with the unit center calibration reference deviation azimuth, so that the error after the center of the lower leakage stop ring is converted is eliminated.
5. The one-time installation and positioning process of the guide vane with the rotating wheel of the water guide mechanism adopts a method for measuring the opening torsion force of the guide vane for checking the flexibility of the movable guide vane, intuitively reads the opening torsion force of the guide vane, is beneficial to analyzing whether the guide vane has a blocking phenomenon or not, and is beneficial to ensuring the installation quality of the water guide mechanism.
6. The one-time installation positioning process of the water guide mechanism with the rotating wheel has higher requirements on the deviation of the installation center of each part, is beneficial to improving the integral installation precision of the water guide mechanism and ensures the stable operation of the unit in the later period.
7. The one-time installation and positioning process of the water guide mechanism with the rotating wheel greatly simplifies the installation process of the water guide mechanism, reduces the construction difficulty, improves the working efficiency, saves the construction cost and adds a new process for the installation of the water guide mechanism of the water turbine.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a flow chart of a one-time installation and positioning process of a water guide mechanism with a rotating wheel.
FIG. 2 is a cross-sectional view of the water guide mechanism with the rotating wheel for one-time installation and positioning according to the present invention.
Fig. 3 is a plan view of the embedment of the hydraulic turbine apparatus of the present invention.
In FIG. 2, 10-seat ring, 11-bottom ring, 12-cone, 13-lower leakage stop ring, 14-runner, 15-upper leakage stop ring, 16-movable vane, 17-top cover, 18-movable vane middle sleeve, 19-movable vane upper sleeve, 20-pit liner, 21-bottom ring leakage surface, S4-I-pit liner central mark point I, S4-II-bottom ring leakage surface central mark point II.
In FIG. 3, 10-seat ring, 20-pit liner, 21-bottom ring drain surface, 101-seat ring X axis, 102-seat ring Y axis, S4-I (1) -pit liner center mark point I, S4-I (2) -pit liner center mark point I, S4-I (3) -pit liner center mark point I, S4-I (4) -pit liner center mark point I, S4-II (1) -bottom ring drain surface center mark point II, S4-II (2) -bottom ring drain surface center mark point II, S4-II (3) -bottom ring drain surface center mark point II, S4-II (4) -bottom ring drain surface center mark point II, and S4-II (4) -bottom ring drain surface center mark point II.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. It should be noted that although functional block division is performed in a process flow diagram, and logical ordering is shown in the flow diagram, in some cases, the steps shown or described may be performed in a different process flow block division or order in the flow diagram.
Embodiments of the present invention will be further described with reference to fig. 1, fig. 2, and fig. 3.
Referring to fig. 1, a process flow chart of one-time installation and positioning of a water guide mechanism with a rotating wheel is provided, and the process comprises the following steps:
1) The hydraulic turbine seat ring is installed by the bottom ring 11 after site processing and cleaning, the bottom ring 11 is concentrically adjusted by taking the center of the seat ring 10 as a reference, the position of the bottom ring 11 is consistent with the position of the seat ring 10, and the center of the bottom ring and the position are fixed with the seat ring 10 by bolts after being qualified.
2) After the bottom ring 11 is installed and fixed, the conical pipe 12 is installed and the secondary concrete is poured and grouted, the center of the conical pipe 12 is concentrically adjusted by taking the center of the bottom ring 11 as a reference, the azimuth adjustment of the conical pipe 12 is consistent with the azimuth of the seat ring 10, and the conical pipe 12
And adjusting the gaps of the upper and lower circular seams to the design requirement and plugging the outer gaps of the circular seams. And the secondary concrete pouring and grouting are performed after the upper circumferential seam of the taper pipe 12 is welded, and the lower circumferential seam of the taper pipe 12 is welded after the secondary concrete pouring and grouting.
3) The cone pipe 12 and the secondary concrete pouring and grouting are finished, and then the lower leakage-stopping ring 13 is installed, and the lower leakage-stopping ring 13
The center of the bottom ring 11 is used as a reference for concentric adjustment, the azimuth of the lower leakage stop ring 13 is consistent with that of the bottom ring 11, and the bottom ring 11 is fixed by bolts after the center and the azimuth are adjusted to be qualified.
4) The unit installation center calibration S4 is a technical core of one-time installation and positioning of a water guide mechanism with a rotating wheel, and before the unit installation center calibration, measuring point marks are carried out on the wall of a pit liner 20 and a bottom ring leakage surface 21, and the method is as follows: 4 measuring point marks S4-I (1), S4-I (2) and S4-
I (3), S4-I (4), the mark point S4-I is higher than the upper plane of the top cover 17, 4 measuring point marks are recommended to be in the directions of the X axis 101 and the Y axis 102 of the seat ring; the same method is used to make other 4 marking points S4-II (1), S4-II (2), S4-II (3) and S4-
And II (4) the positions of the 4 measuring points are consistent with those of the marking points on the lining wall in the pit. The center of the lower leak-stopping ring 13 is converted to mark points S4-I and S4-II on the wall of the pit lining 20 and the bottom ring leakage surface 21 respectively by taking the lower leak-stopping ring as a center reference, and the mark is carried out.
5) After the unit center is calibrated, the rotating wheel 14 is lifted into a pit for adjustment and fixation, the temporary installation height of the rotating wheel 14 is determined according to the sum of the sizes of the turbine shaft and the generator shaft spigot and the coupling gap before the rotating wheel 14 is lifted, the center of the rotating wheel 14 is concentrically adjusted by taking the unit installation center calibration S4-I as a reference, the center of the rotating wheel and the height adjustment are qualified, and the upper leakage stop ring 15 is lifted onto the rotating wheel 14 for placement after the rotating wheel is reliably fixed.
6) After the top cover 17 is cleaned, the split top cover is lifted into a pit for assembly and lifting, the split top cover 17 is lifted into the pit for assembly through a combined bolt, then the leak-proof ring 15 is installed, then the top cover 17 is lifted by a factory bridge machine and is suspended above a water machine room through a special tool, and the installation of the bearings 18 in all movable guide vanes is completed.
7) The movable guide vane 16 is cleaned before being installed, and the movable guide vane 16 is arranged on the top cover 17 through a guide vane special tool
The center holes are hung into the pits one by one and are installed in place, and the sealing element is installed before the movable guide vanes 16 are installed in place.
8) After all movable guide vanes 16 are installed in place, a factory bridge crane is used for hanging a top cover 17 in place and then carrying out top cover adjustment and fixing, the center of the top cover 17 is concentrically adjusted by taking a unit center calibration S4-I as a reference, the orientation of the top cover 17 is consistent with the orientation adjustment of a seat ring 10, and after the top cover 17 is adjusted to be qualified, a clearance gauge is used for checking the total gap of the end face of each movable guide vane 16
The design requirement should be satisfied, and the installation top cap 17 is qualified after the inspection top cap and seat ring 10 are closed the bolt and are fastened. 9) After the top cover 17 is installed qualified, the movable guide vane upper bearing 19 is installed, and all the movable guide vane upper bearings 19 are installed
After the assembly is finished, checking the end face clearance of the guide vane again to be qualified, and checking the flexibility degree of each movable guide vane by using a chain block, a tension meter and a special tool S91, wherein the flexibility degree of the guide vane is judged mainly by the opening torsion force of the guide vane.
And (3) after the guide vane flexibility check S91 is finished, carrying out pin drilling dumpling positioning S92 on the top cover 17 and the movable guide vane upper bearing 19. 10 After the guide vane bearing is installed S9, other parts of the water guide mechanism are installed
The installation process is carried out according to the conventional water guide mechanism, and the invention is not repeated.
The axis direction of the bottom ring is required to be adjusted to coincide with the axis direction of the seat ring, and the direction deviation is preferably less than or equal to 1mm; the concentricity deviation is less than or equal to 0.05mm; the radial levelness deviation of the bottom ring is less than or equal to 0.02mm/m.
The concentricity deviation of the lower leakage stop ring and the bottom ring is less than or equal to 0.05mm; the difference between the radius of each step of the leakage stop ring and the average radius should not exceed +/-10% of the designed gap of the leakage stop ring.
The calibration deviation of the installation center of the unit is less than or equal to 0.05mm. The 4 central marking points S4-I marked on the lining wall in the pit should be on the same elevation surface; the 4 center mark points S4-II marked on the bottom ring leakage surface should be on the same elevation surface, and the positions of the points are consistent with the positions of the points S4-I.
The center deviation of the rotating wheel is less than or equal to 0.05mm, and the levelness deviation of the rotating wheel is less than or equal to 0.02mm/m; the rotating wheel and the bottom ring are tightly fixed by eight copper wedge plates, the rotating wheel is monitored by a dial indicator to avoid displacement in the tightening process of the wedge plates, and the clearance between the rotating wheel at the positions of the eight wedge plates is checked by a feeler gauge and recorded.
The center difference after the top cover is installed is less than or equal to 0.05mm, the top cover azimuth deviation is less than or equal to 1mm, and the gap between the large end surface and the small end surface of the movable guide vane is checked to be free from regular inclination.
Preferably, the single movable vane torque force should be not more than 60% of the average torque force of all movable vanes.
The one-time installation and positioning process of the water guide mechanism with the rotating wheel avoids secondary disassembly and assembly and lifting of parts such as the top cover, the guide vane and the like, and greatly simplifies the installation process of the water guide mechanism. The invention is successfully applied to the installation of three water pump water turbine water guide mechanisms of Guangdong Yangjiang pumped storage power station, obtains better installation quality, eliminates construction potential safety hazards, reduces construction difficulty, meets the requirements of energy conservation, emission reduction, low carbon and environmental protection, and has remarkable social and economic benefits.
While the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and these equivalent modifications and substitutions are intended to be included in the scope of the present invention as defined in the appended claims.
Claims (7)
1. A one-time installation and positioning process for a water guide mechanism with a rotating wheel of a water turbine is characterized by comprising the following steps of:
1) The method comprises the steps that (S1) after site processing of a water turbine seat ring is completed and cleaned, bottom ring installation is carried out, the bottom ring is concentrically adjusted by taking the center of the seat ring as a reference, the azimuth of the bottom ring is consistent with that of the seat ring, and after the center and the azimuth are adjusted to be qualified, the bottom ring is fastened with the seat ring through bolts;
2) The method comprises the steps of (1) installing a bottom ring, fixing the bottom ring, then carrying out cone pipe installation, secondary concrete pouring and grouting (S2), wherein the center of the cone pipe is concentrically adjusted by taking the center of the bottom ring as a reference, the azimuth of the cone pipe is consistent with the azimuth adjustment of a seat ring, the gap between the upper and lower annular seams of the cone pipe is adjusted to the design requirement, the gap outside the annular seams is plugged, the secondary concrete pouring and grouting are carried out after the welding of the upper annular seam of the cone pipe, and the welding is carried out after the secondary concrete pouring and grouting of the lower annular seam of the cone pipe;
3) The method comprises the steps that (1) after pouring and grouting (S2) of taper pipes and secondary concrete are completed, lower leakage-stopping rings are installed (S3), the centers of the lower leakage-stopping rings are adjusted to be concentric by taking the centers of the bottom rings as references, the positions of the lower leakage-stopping rings are consistent with those of the bottom rings, and bolts are used for fastening and fixing the bottom rings after the centers and the positions are adjusted to be qualified;
4) The unit installation center calibration (S4) is the core of a one-time installation positioning technology of the water guide mechanism with the rotating wheel, the unit installation center calibration is to take the following leak-proof ring as a center reference, and the center reference is led to the positions of the pit lining and the bottom ring leak-off ring for identification, so that center conversion is completed;
5) After the unit center calibration (S4) is finished, hanging the rotating wheel into a machine pit for adjustment and fixation (S5), determining the temporary installation elevation of the rotating wheel according to the sum of the sizes of the turbine shaft and the generator shaft spigot and the coupling gap before hanging the rotating wheel, adjusting concentricity of the center of the rotating wheel by taking the unit installation center calibration (S4) as a reference, adjusting the center of the rotating wheel and the elevation to be qualified, and hanging the upper leakage-stopping ring on the rotating wheel for placement after reliably fixing the rotating wheel;
6) After the top cover is cleaned between plant installations, hanging the split top cover into a pit for assembly and lifting (S6), wherein the split top cover is hung into the pit for assembly into a whole through a combined bolt and then is provided with a leakage stop ring, and then a plant bridge machine is used for lifting the top cover and hanging the top cover above a water turbine chamber through a special tool to complete bearing installation in all movable guide vanes;
7) The movable guide vanes are cleaned before being installed (S7), the movable guide vanes are hung into a pit one by one through guide vane special tools to be installed in place, and sealing elements are installed before the movable guide vanes are installed in place;
8) After the movable guide vanes are all installed (S7) in place, hanging the top cover in place by using a factory bridge machine, and then installing, adjusting and fixing the top cover (S8); the center of the top cover and the center calibration (S4) of the unit are used as reference adjustment concentricity, the azimuth of the top cover is consistent with the azimuth adjustment of the seat ring, after the top cover is adjusted to be qualified, a clearance gauge is used for checking the total clearance of the end face of each movable guide vane to meet the design requirement, and after the top cover is checked to be qualified, a top cover and a seat ring are installed to tightly fix a closing bolt;
9) After the top cover is installed to be qualified, movable guide vane bearings are installed (S9), the guide vane end face gaps are inspected to be qualified again after all guide vane bearings are installed, the opening torsion force of each guide vane is inspected (S91) flexibly by using a chain block, a tension meter, a special tool and the like, and dumpling drilling and positioning are performed on the top cover and bearing pins (S92) after the guide vane bearings are installed and inspected;
10 After the guide vane bearing is installed (S9), other parts of the water guide mechanism are installed (S10).
2. The disposable mounting and positioning process for a water guide mechanism with a rotating wheel of a water turbine according to claim 1, wherein the disposable mounting and positioning process is characterized in that: the axis direction of the bottom ring in the step 1) is required to be adjusted to coincide with the axis direction of the seat ring, and the direction deviation is preferably less than or equal to 1mm;
the concentricity deviation is less than or equal to 0.05mm; the radial levelness deviation of the bottom ring is less than or equal to 0.02mm/m.
3. The disposable mounting and positioning process for a water guide mechanism with a rotating wheel of a water turbine according to claim 1, wherein the disposable mounting and positioning process is characterized in that: the concentricity deviation of the lower leakage stop ring and the bottom ring in the step 2) is less than or equal to 0.05mm; the difference between the radius of each step of the leakage stop ring and the average radius should not exceed +/-10% of the designed gap of the leakage stop ring.
4. The disposable mounting and positioning process for a water guide mechanism with a rotating wheel of a water turbine according to claim 1, wherein the disposable mounting and positioning process is characterized in that: the calibration deviation of the installation center of the unit in the step 4) is less than or equal to 0.05mm.
5. The disposable mounting and positioning process for a water guide mechanism with a rotating wheel of a water turbine according to claim 1, wherein the disposable mounting and positioning process is characterized in that: the center deviation of the rotating wheel in the step 5) is less than or equal to 0.05mm, and the levelness deviation of the rotating wheel is less than or equal to 0.02mm/m; eight copper wedge plates are used for tightening and fixing the rotating wheel and the bottom ring, a dial indicator is used for monitoring the rotating wheel not to displace in the tightening process of the wedge plates, a clearance gauge is used for checking the rotating wheel gaps at the positions of the eight wedge plates and recording the gaps, and the clearance gauge is used as a reference for rechecking the center of the rotating wheel in the construction process.
6. The disposable mounting and positioning process for a water guide mechanism with a rotating wheel of a water turbine according to claim 1, wherein the disposable mounting and positioning process is characterized in that: the center deviation of the top cover in the step 8) is smaller than or equal to 0.05mm after the top cover is installed, the azimuth deviation of the top cover is smaller than or equal to 1mm, and the gap between the large end surface and the small end surface of the movable guide vane is checked to be free from regular inclination.
7. The disposable mounting and positioning process for a water guide mechanism with a rotating wheel of a water turbine according to claim 1, wherein the disposable mounting and positioning process is characterized in that: the step 9) the single movable vane opening torsion force is not more than 60% of the average torsion force of all movable vanes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310728495.9A CN116890221A (en) | 2023-06-19 | 2023-06-19 | Disposable installation and positioning process for water guide mechanism with rotating wheel of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310728495.9A CN116890221A (en) | 2023-06-19 | 2023-06-19 | Disposable installation and positioning process for water guide mechanism with rotating wheel of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116890221A true CN116890221A (en) | 2023-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310728495.9A Pending CN116890221A (en) | 2023-06-19 | 2023-06-19 | Disposable installation and positioning process for water guide mechanism with rotating wheel of water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116890221A (en) |
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2023
- 2023-06-19 CN CN202310728495.9A patent/CN116890221A/en active Pending
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