A boring device and method for boring a hydroelectric power station coupling pin hole type component

Abstract

A kind of boring device of hydroelectric station coupling pin hole class component, including the correction template of installation in the lower plane of rotor support flange, correction template is fixed together with rotor support by locating pin shaft and clamping device, the position of flange upper plane correction template is opposite, installation positioning tool, positioning tool is fixed together with the upper plane of rotor support flange by clamping device, boring machine is detachably installed on positioning tool;The present application realizes quick positioning by correction template, saves correction time;Through positioning tool, effective positioning of boring machine in narrow space is realized, while ensuring the effective implementation of boring of boring machine;Through locating pin shaft, effective positioning of correction template is realized, while ensuring the center of rotor support and boring machine is effectively unified;Through the device, the on-site repair of rotor coupling pin hole is realized, a large amount of manpower and material resources are saved, the construction period is guaranteed, and the applicability is wide, the generalizability is strong, and the practical application value is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water turbine generator unit maintenance, in particular to a boring device and method for water power station shaft pin hole parts. BACKGROUND

[0002] During the maintenance of the power station unit, the hole position of the rotor shaft pin is damaged by the pin during the process of disassembling the pin bolt, the damage depth exceeds 1mm, and the damage area exceeds 70% of the hole wall, so that the positioning function is lost. After analysis, the pin hole needs to be repaired, the original pin hole can be expanded, and a single stepped pin shaft can be matched to meet the installation and positioning requirements of the rotor support and the water turbine shaft.

[0003] Due to the super large diameter of the water turbine rotor, which exceeds 15m, the rotor is returned to the factory for pin hole repair, which not only causes transportation difficulties, time and labor consumption, but also delays the operation of the hydropower station, so it is urgent to repair it on site.

[0004] The distance between the center of the repaired pin hole and the vertical surface of the inner wall of the rotor center body is small, only 230mm, the space occupied by the main shaft and motor of the ordinary boring equipment is large, and the boring processing cannot be satisfied under this space position, the processing stroke cannot be satisfied by using small equipment, according to the on-site investigation and process requirements, the processing stroke needs to satisfy at least 400mm, and the precision needs to satisfy the processing requirements.

[0005] The rotor is placed in the power station plant, the flange surface of the bottom surface of the repaired pin hole is small, only 600mm, and the boring repair from below to above cannot be realized by installing the equipment below.

[0006] Therefore, the company establishes a project team to tackle the problem, completes the repair of the damaged pin hole of the water turbine rotor on site, and ensures the effective operation of the hydropower station. SUMMARY

[0007] The technical problem to be solved by the present application is to provide a boring device and method for water power station shaft pin hole parts, to overcome the problem of narrow operation space in the on-site repair of the rotor support pin hole of large equipment of the hydropower station, to complete the on-site repair of the damaged pin hole, and to ensure the accuracy and construction period.

[0008] To solve the above technical problems, the technical scheme adopted by the present application is: a boring device for water power station shaft pin hole parts, comprising a correction template installed on the lower plane of the flange of the rotor support, the correction template and the rotor support are fixed together through a positioning pin shaft and a clamping device, the position opposite to the upper plane correction template of the flange, a positioning tool is installed, the positioning tool is fixed together with the upper plane of the flange of the rotor support through a pressing device, and a boring machine is detachably installed on the positioning tool.

[0009] In the preferred scheme, the correction template is provided with a set of positioning pin shaft mounting holes, the hole diameter of the mounting holes is the same as the hole diameter of the pin holes on the rotor support flange, and a reference hole is further provided between the set of mounting holes on the correction template, the hole diameter of the reference hole is larger than the hole diameter of the pin holes on the rotor support flange, and the hole positions of the mounting holes and the reference hole are machined with the pin holes on the large shaft of the rotor support as the reference.

[0010] In the preferred scheme, the four corners of the correction template are further provided with two sets of lifting holes.

[0011] In the preferred scheme, the positioning pin shaft is a hollow cylinder, the outer diameter is the same as the hole diameter of the mounting holes on the correction template and the pin holes on the rotor support flange, and auxiliary mounting holes are provided on the end faces of the two ends of the positioning pin shaft.

[0012] In the preferred scheme, the clamping device includes an upper pressing plate and a lower pressing plate, the upper pressing plate is installed on the plane of the positioning tool, the lower pressing plate is installed on the lower plane of the correction template, and the positioning tool, the correction template and the rotor support flange are clamped and fixed together by the locking screw and the locking nut.

[0013] In the preferred scheme, the positioning tool includes a transverse reference plate, a connecting positioning plate is vertically fixed on the transverse reference plate, and a set of supporting vertical ribs are provided on the back surface of the connecting positioning plate.

[0014] In the preferred scheme, the transverse reference plate of the positioning tool is provided with a boring machine boring bar through hole, a set of waist holes are provided on both sides of the boring bar through hole for installing the locking screw of the clamping device.

[0015] In the preferred scheme, the connecting positioning plate of the positioning tool is provided with a boring machine installation positioning reference surface, a plurality of installation holes are provided on the installation positioning reference surface, and a plurality of lightening holes are further provided on the connecting positioning plate.

[0016] In the preferred scheme, the boring machine is a portable boring machine, including a boring bar, a main shaft box, a feeding box, a power device and a tool bar are fixedly installed on the boring bar, a connecting flange is provided on the main shaft box, and the boring machine is connected and fixed with the connecting positioning plate of the positioning tool through the connecting flange by adjusting bolts and nuts.

[0017] A boring method for water power station shaft pin hole type components is adopted by using any one of the boring devices for water power station shaft pin hole type components.

[0018] Step 1: Make a correction template, process the upper and lower planes of the correction template after blanking, ensure the flatness and smoothness of the upper and lower planes, take the pin holes on the large shaft of the rotor support as the reference to process the reference hole and the two side positioning pin shaft mounting holes, ensure the size accuracy and smoothness of the holes, and pass the acceptance after inspection.

[0019] step2: make the positioning pin shaft, saw the material after processing the positioning pin shaft outer circle, inner hole and two end faces, ensure that the outer circle size is the same as the hole diameter of the mounting hole on the correction template and the pin hole on the rotor support flange, and is set to interference fit, and is ready for use after acceptance;

[0020] step3: make the positioning tool, blanking and welding the positioning tool blank according to the drawing, process the boring bar through hole, waist hole, mounting positioning reference surface and the mounting hole on the surface, and is ready for use after acceptance;

[0021] step4: install the correction template on the lower plane of the rotor support flange, and fix the correction template and the lower plane of the rotor support flange together through a set of positioning pin shafts, and the reference hole axis is collinear with the pin hole axis to be repaired on the rotor support flange flange;

[0022] step5: place the positioning tool on the upper plane of the rotor support flange, so that a set of waist holes are aligned with the positioning pin shaft inner hole;

[0023] step6: install the upper pressing plate on the upper plane of the positioning tool transverse reference plate, install the lower pressing plate on the lower plane of the correction template, insert the locking screw through the waist hole and the positioning pin shaft inner hole, and install the locking nut at both ends and lock it;

[0024] step7: install the boring machine, the connecting flange of the boring machine is flat with the mounting positioning reference surface of the positioning tool, and is installed and fixed together by adjusting bolt and nut;

[0025] step8: correct the boring machine, so that the boring machine spindle axis is consistent with the axis of the reference hole of the correction template, to ensure concentricity and coaxiality, and the boring machine is fixed and locked after correction;

[0026] step9: start the boring machine to bore the pin hole on the rotor support, to ensure the size and precision of the pin hole;

[0027] step10: after the repair of one pin hole is completed, remove the boring machine, loosen the clamping device, remove the positioning tool, insert the bolt into the auxiliary mounting hole at the end face of the positioning pin shaft, hammer the bolt head, remove the positioning pin shaft, remove the correction template, and repeat steps 4-9 to complete the repair of the next pin hole to be repaired on the rotor support.

[0028] The boring device and method for the water power station shaft pin hole component provided by the application has the following beneficial effects:

[0029] 1、The correction template provided by the application realizes rapid positioning of the device and saves correction time;

[0030] 2、The setting of the positioning tool of the present application effectively protects the mounting surface and the processing surface of the rotor support while effectively positioning the boring machine, thereby further improving the reliability and stability of the device;

[0031] 3、The setting of the clamping device makes the positioning tool, the correction template and the rotor support flange effectively connected and fixed as a whole, and facilitates installation and disassembly, thereby providing protection for subsequent boring processing, effectively protecting the important reference surface and the processing surface, and further improving the reliability and stability of the device;

[0032] 4、The setting of the positioning pin shaft effectively protects the pin hole on the rotor support flange while effectively connecting and fixing the rotor support and the correction template as a whole; the hollow cylinder design of the positioning pin shaft provides a channel for the installation of the subsequent clamping device; the auxiliary installation hole design allows the positioning pin shaft to be smoothly removed from the pin hole of the rotor support and the correction template, effectively protecting the important installation surface of the positioning pin shaft and the rotor support pin hole, thereby further improving the reliability and safety of the device;

[0033] 5、The present application successfully solves the on-site repair of the rotor coupling pin hole, saves a lot of manpower and material resources, and ensures the construction period;

[0034] 6、The present application can be widely applied to on-site processing of similar coupling pin holes and on-site processing of pin holes in similar narrow spaces, and has certain popularization and applicability in hydropower station maintenance;

[0035] 7、The device of the present application increases the adjusting mechanism, the servo motor and the numerical control system, and can also realize automatic correction of the boring machine spindle in the X / Y / Z axis direction of the coordinate system, thereby improving the correction efficiency, and can be applied to multi-pin hole on-site repair processing, has strong expansibility, large upgrade space, provides a new idea for the processing field of similar coupling pin holes, has high practical application value, good economic benefit and social benefit. BRIEF DESCRIPTION OF DRAWINGS

[0036] The present application will be further described below in combination with the drawings and implementation examples:

[0037] Figure 1 is a schematic diagram of the overall structure of the present application;

[0038] Figure 2 is a top view of the overall installation state of the present application;

[0039] Figure 3 is a schematic diagram of the structure of the correction template of the present application;

[0040] Figure 4 is a schematic diagram of the structure of the positioning pin shaft of the present application;

[0041] Figure 5 The schematic view of the clamping device of the present application;

[0042] Figure 6 The front view of the positioning tool of the present application;

[0043] Figure 7 The rear view of the positioning tool of the present application;

[0044] Figure 8 The top view of the positioning tool of the present application;

[0045] Figure 9 The front view of the boring machine of the present application;

[0046] Figure 10 The left view of the boring machine of the present application;

[0047] In the figure: rotor support 1, correction template 2, positioning pin shaft 3, clamping device 4, positioning tool 5, lifting hole 6, boring machine 7, mounting hole 8, reference hole 9, auxiliary mounting hole 10, upper pressing plate 41, lower pressing plate 42, locking screw 43, locking nut 44, transverse reference plate 51, connecting positioning plate 52, supporting vertical rib 53, boring rod through hole 54, waist hole 55, mounting positioning reference surface 56, lightening hole 57, boring rod 71, main shaft box 72, feed box 73, power device 74, tool bar 75, connecting flange 76. DETAILED DESCRIPTION

[0048] Please refer to the attached Figures 1-10 The boring device for the shaft pin hole parts of the hydropower station shown in the figure, including the correction template 2 installed on the flange lower plane of the rotor support 1, the correction template 2 and the rotor support 1 are fixed together through the positioning pin shaft 3 and the clamping device 4, the flange upper plane correction template 2 is opposite to the position, the positioning tool 5 is installed and fixed together through the clamping device 4 and the flange upper plane of the rotor support 1, and the boring machine 7 is detachably installed on the positioning tool 5.

[0049] In the embodiment, the correction template 2 is provided with a group of positioning pin shaft 3 mounting holes 8, the hole diameter of the mounting hole 8 is the same as the hole diameter of the pin hole on the flange of the rotor support 1, and a reference hole 9 is further provided between the group of mounting holes 8 on the correction template 2, the hole diameter of the reference hole 9 is greater than the hole diameter of the pin hole on the flange of the rotor support 1, and the hole positions of the mounting hole 8 and the reference hole 9 are machined with the pin hole on the large shaft matched with the rotor support 1 as the reference.

[0050] Further, two groups of lifting holes 6 are further provided at the four corners of the correction template 2.

[0051] Further, the positioning pin shaft 3 is a hollow cylinder, the outer circle size is the same as the hole diameter of the mounting hole 8 on the correction template 2 and the pin hole on the flange of the rotor support 1, and the auxiliary mounting hole 10 is arranged on the end face of the positioning pin shaft 3.

[0052] Further, the clamping device 4 includes an upper pressing plate 41 and a lower pressing plate 42, the upper pressing plate 41 is installed on the plane of the positioning tool 5, the lower pressing plate 42 is installed on the lower plane of the correction template 2, and the upper pressing plate 41 and the lower pressing plate 42 are clamped and fixed together with the positioning tool 5, the correction template 2 and the flange of the rotor support 1 through the locking screw 43 and the locking nut 44.

[0053] Further, the positioning tool 5 includes a transverse reference plate 51, a connecting positioning plate 52 is vertically fixed on the transverse reference plate 51, and a group of supporting vertical ribs 53 are arranged on the back of the connecting positioning plate 52.

[0054] Further, the transverse reference plate 51 of the positioning tool 5 is provided with a boring bar through hole 54 of the boring machine 7, a group of waist holes 55 are arranged on both sides of the boring bar through hole 54, and the locking screw 43 of the clamping device 4 is installed.

[0055] Further, the connecting positioning plate 52 of the positioning tool 5 is provided with a boring machine 7 installation positioning reference surface 56, a plurality of installation holes are arranged on the installation positioning reference surface 56, and a plurality of lightening holes 57 are further arranged on the connecting positioning plate 52.

[0056] Further, the boring machine 7 is a portable boring machine, including a boring bar 71, a main shaft box 72, a feeding box 73, a power device 74 and a tool bar 75 are fixedly installed on the boring bar 71, a connecting flange 76 is arranged on the main shaft box 72, and the boring machine 7 is connected and fixed with the connecting positioning plate 52 of the positioning tool 5 through the connecting flange 76 by using adjusting bolts and nuts.

[0057] In specific use, the boring method of the boring device for the hydroelectric power station shaft pin hole component is adopted, and the method includes the following steps:

[0058] Step 1: making the correction template 2, processing the upper and lower planes of the correction template 2 after blanking, ensuring the flatness and smoothness of the upper and lower planes, taking the pin hole on the large shaft of the rotor support 1 as a reference, processing the reference hole 9 and the mounting hole 8 on both sides of the positioning pin shaft 3, ensuring the size accuracy and smoothness of the hole, and reserving after acceptance;

[0059] Step 2: making the positioning pin shaft 3, processing the outer circle, inner hole and both end faces of the positioning pin shaft 3 after sawing, ensuring that the outer circle size is the same as the hole diameter of the mounting hole 8 on the correction template 2 and the pin hole on the flange of the rotor support 1, and being set as interference fit, and reserving after acceptance;

[0060] step3: make positioning tool 5, according to the drawing blank welding positioning tool 5, processing boring bar hole 54, waist hole 55, installation positioning datum plane 56 and the hole on the plane, after acceptance, for standby;

[0061] step4: install the correction template 2 on the lower plane of the rotor support 1 flange, and fix the correction template 2 and the lower plane of the rotor support 1 flange together through a set of positioning pin shafts 3, and the axis of the reference hole 9 is collinear with the axis of the pin hole to be repaired on the upper flange of the rotor support 1;

[0062] step5: place the positioning tool 5 on the upper plane of the rotor support 1 flange, so that a set of waist holes 55 are aligned with the inner holes of the positioning pin shafts 3;

[0063] step6: install the upper pressing plate 41 on the upper plane of the transverse reference plate 51 of the positioning tool 5, install the lower pressing plate 42 on the lower plane of the correction template 2, and insert the locking screw 43 into the waist hole 55 and through the inner hole of the positioning pin shaft 3, and install the locking nut 44 at both ends and lock it;

[0064] step7: install the boring machine 7, and the connecting flange 76 of the boring machine 7 is flat with the installation positioning datum plane 56 of the positioning tool 5, and is fixed together by adjusting bolts and nuts;

[0065] step8: correct the boring machine 7, so that the axis of the boring machine 7 spindle is consistent with the axis of the correction template 2 reference hole 9, to ensure concentricity and coaxiality, and after the boring machine 7 is corrected, the connecting flange 76 and the positioning tool 5 are fixed and locked;

[0066] step9: start the boring machine 7 to bore the pin hole on the rotor support 1 to ensure the size and precision of the pin hole;

[0067] step10: after the repair of a pin hole is completed, remove the boring machine 7, loosen the clamping device 4, remove the positioning tool 5, insert a bolt into the auxiliary installation hole 11 at the end surface of the positioning pin shaft 3, hammer the bolt head, remove the positioning pin shaft 3, and remove the correction template 2, and repeat steps 4-9 to complete the repair of the next pin hole to be repaired on the rotor support 1.

[0068] After the on-site repair is completed, it successfully passes the three-level acceptance, the repair precision reaches 0.02mm, and the construction period is shortened by 3 days based on the original 7 days, and after being put into operation, the hydroelectric generator set runs normally and feedback is good.

[0069] In the preferred scheme, the four corners of the correction template 2 are further provided with two groups of lifting holes 6; the lifting holes 6 are provided to facilitate the lifting and transportation of the correction template 2, effectively protect the important reference surface and hole of the correction template 2, and further ensure the boring precision of the boring device.

[0070] In the preferred embodiment, the positioning pin shaft 3 is a hollow cylinder with the same outer diameter as the mounting hole 8 on the correction template 2 and the pin hole on the flange of the rotor support 1, and auxiliary mounting holes 10 are provided on the end faces of the positioning pin shaft 3. This arrangement effectively connects and fixes the rotor support 1 and the correction template 2 as a whole while effectively protecting the pin hole on the flange of the rotor support 1. The hollow cylinder design of the positioning pin shaft 3 provides a channel for the installation of the subsequent clamping device 4. The auxiliary mounting holes 10 allow the positioning pin shaft 3 to be easily removed from the pin hole of the rotor support 1 and the correction template 2 while effectively protecting the important mounting surface of the positioning pin shaft 3 and the pin hole of the rotor support 1, thereby further improving the reliability and safety of the device.

[0071] In the preferred embodiment, the clamping device 4 includes an upper pressing plate 41 and a lower pressing plate 42. The upper pressing plate 41 is installed on the flat surface of the positioning tool 5, and the lower pressing plate 42 is installed on the lower flat surface of the correction template 2. The upper pressing plate 41 and the lower pressing plate 42 are clamped and fixed together with the positioning tool 5, the correction template 2, and the flange of the rotor support 1 through the locking screw 43 and the locking nut 44. This arrangement effectively connects and fixes the positioning tool 5, the correction template 2, and the flange of the rotor support 1 as a whole, making it easy to install and disassemble, providing a guarantee for subsequent boring processing, and effectively protecting important reference surfaces and processing surfaces, thereby further improving the reliability and stability of the device.

[0072] In the preferred embodiment, the positioning tool 5 includes a transverse reference plate 51 with a connecting positioning plate 52 vertically fixed thereon, and a set of supporting vertical ribs 53 provided on the back of the connecting positioning plate 52. This arrangement ensures the positioning function of the positioning tool 5 while ensuring the rigidity and stability of the positioning tool 5, thereby further improving the stability and reliability of the device.

[0073] In the preferred embodiment, the transverse reference plate 51 of the positioning tool 5 is provided with a boring bar through hole 54 for the boring machine 7, and a set of waist holes 55 are provided on both sides of the boring bar through hole 54 for installing the locking screw 43 of the clamping device 4. This arrangement effectively positions the boring machine 7 while facilitating the processing of the boring bar 71, thereby further improving the practicality and design rationality of the device.

[0074] In the preferred scheme, the connecting positioning plate 52 of the positioning tool 5 is provided with a boring machine 7 mounting positioning reference surface 56, and a plurality of mounting holes are arranged on the mounting positioning reference surface 56, and a plurality of lightening holes 57 are further arranged on the connecting positioning plate 52; the above arrangement can effectively position the boring machine 7 while ensuring the positioning accuracy, and facilitates installation, disassembly and adjustment; the arrangement of the lightening holes 57 facilitates installation and transportation, and is beneficial to the operation of the boring machine 7, thereby further improving the rationality and practicability of the device design.

[0075] In the preferred scheme, the boring machine 7 is a portable boring machine, which comprises a boring bar 71, and a main shaft box 72, a feeding box 73, a power device 74 and a cutter bar 75 are fixedly arranged on the boring bar 71; a connecting flange 76 is arranged on the main shaft box 72, and the boring machine 7 is connected and fixed with the connecting positioning plate 52 of the positioning tool 5 through the connecting flange 76 by using adjusting bolts and nuts; the above arrangement can realize the function of the boring machine 7 while being effectively connected and fixed with the positioning tool 5, thereby ensuring the boring accuracy.

[0076] In summary, the boring device and method for the shaft coupling pin hole component of the hydropower station provided by the present application effectively solves the problems of narrow operation space and on-site repair of the rotor support pin hole of the large-scale equipment of the hydropower station, completes the on-site repair of the strained pin hole while ensuring the accuracy and construction period; the present application realizes the rapid positioning of the device through the arrangement of the correction template 2, thereby saving the correction time; the arrangement of the positioning tool 5 of the present application can effectively position the boring machine while protecting the mounting surface and the processing surface of the rotor support 1; the effective connection and fixation of the positioning tool 5, the correction template 2 and the flange of the rotor support 1 as a whole through the arrangement of the clamping device 4 facilitates installation and disassembly, provides protection for subsequent boring processing, effectively protects the important reference surface and the processing surface; the arrangement of the positioning pin shaft 3 can effectively connect and fix the rotor support 1 and the correction template 2 as a whole while effectively protecting the pin hole on the flange of the rotor support 1; the hollow cylinder of the positioning pin shaft 3 provides a channel for the installation of the subsequent clamping device 4; the design of the auxiliary mounting hole 10 can smoothly remove the positioning pin shaft 3 from the pin hole of the rotor support 1 and the correction template 2 while effectively protecting the important mounting surface of the positioning pin shaft 3 and the pin hole of the rotor support 1; the use of the device successfully solves the on-site repair of the rotor shaft coupling pin hole, saves a large amount of manpower and material resources, ensures the construction period, and has the advantages of ingenious concept, exquisite design, scientific and standardized method, simple and reliable structure, high reusability, strong practicability and expandability, high popularization value, high practical application value, good economic benefit and social benefit, and can be widely applied to the on-site processing of similar shaft coupling pin holes and the on-site processing of pin holes in similar narrow spaces, and has certain popularization and applicability in the maintenance of the hydropower station.

Claims

1. A boring device for boring a shaft hole of a hydroelectric power plant shaft hole type component, characterized by: The correction template (2) is installed on the flange lower plane of the rotor support (1), the correction template (2) is fixed with the rotor support (1) through the positioning pin shaft (3) and the clamping device (4), the flange upper plane correction template (2) is opposite to the position of the installation positioning tool (5), the positioning tool (5) is fixed with the rotor support (1) flange upper plane through the clamping device (4), the positioning tool (5) is detachably installed with the boring machine (7); The correction template (2) is provided with a group of positioning pin shaft (3) installation hole (8), the hole diameter of the installation hole (8) is the same as the hole diameter of the rotor support (1) flange upper pin hole, a group of installation holes (8) are further provided with reference holes (9) on the correction template (2), the hole diameter of the reference hole (9) is greater than the hole diameter of the rotor support (1) flange upper pin hole, the hole position of the installation hole (8) and the reference hole (9) is processed with the pin hole on the large shaft matched with the rotor support (1) as the reference; The connecting positioning plate (52) of the positioning tool (5) is provided with boring machine (7) installation positioning reference surface (56), a plurality of installation holes are provided on the installation positioning reference surface (56), a plurality of lightening holes (57) are further provided on the connecting positioning plate (52).

2. A device for boring a hole in a hydroelectric power station shaft coupling hole type component according to claim 1, characterized in that: Two groups of lifting holes (6) are further provided on the four corners of the correction template (2).

3. A device for boring a hole in a hydroelectric power station shaft coupling hole type component according to claim 2, characterized in that: The positioning pin shaft (3) is a hollow cylinder, the outer diameter is the same as the hole diameter of the installation hole (8) on the correction template (2) and the flange upper pin hole of the rotor support (1), and the auxiliary installation hole (10) is provided on the end face of the positioning pin shaft (3).

4. A device for boring a hole in a hydroelectric power station shaft coupling hole type component according to claim 3, characterized in that: The clamping device (4) includes an upper pressing plate (41) and a lower pressing plate (42), the upper pressing plate (41) is installed on the upper plane of the positioning tool (5), the lower pressing plate (42) is installed on the lower plane of the correction template (2), and the upper pressing plate (41) and the lower pressing plate (42) are clamped and fixed together through the locking screw (43) and the locking nut (44) of the positioning tool (5), the correction template (2) and the flange of the rotor support (1).

5. A device for boring a hole in a hydroelectric power station shaft coupling hole type component according to claim 4, characterized in that: The positioning tool (5) includes a transverse reference plate (51), the connecting positioning plate (52) is vertically fixed on the transverse reference plate (51), and a group of supporting vertical ribs (53) are arranged on the back surface of the connecting positioning plate (52).

6. A device for boring a hole in a hydroelectric power station shaft coupling hole type component according to claim 5, characterized in that: The boring machine (7) boring rod through hole (54) is provided on the transverse reference plate (51) of the positioning tool (5), a group of waist holes (55) are provided on both sides of the boring rod through hole (54), and the locking screw (43) of the clamping device (4) is installed.

7. A device for boring a hole in a hydroelectric power station shaft coupling hole type component according to claim 6, characterized in that: The boring machine (7) is a portable boring machine, which comprises a boring rod (71), a main shaft box (72), a feeding box (73), a power device (74) and a tool bar (75) which are fixedly installed on the boring rod (71), a connecting flange (76) is arranged on the main shaft box (72), and the boring machine (7) is connected and fixed with the connecting positioning plate (52) of the positioning tool (5) through the connecting flange (76) by adjusting bolts and nuts.

8. A method of boring a hole in a hydroelectric power plant coupling pin hole type component, characterized by, The boring device for the water power station coupling pin hole component is adopted, and the boring device comprises the following steps: Step1: Make the correction template (2), after blanking, process the upper and lower planes of the correction template (2), ensure the flatness and smoothness of the upper and lower planes, take the pin hole on the large shaft of the rotor support (1) as the reference, process the reference hole (9) and the installation hole (8) of the two side positioning pin shafts (3), ensure the size accuracy and smoothness of the hole, and pass the acceptance after the qualification, and keep it ready; Step2: Make the positioning pin shaft (3), after sawing, process the outer circle, inner hole and two end faces of the positioning pin shaft (3), ensure that the outer circle size is the same as the hole diameter of the installation hole (8) on the correction template (2) and the pin hole on the flange of the rotor support (1), and set it as interference fit, and keep it ready after passing the acceptance; Step3: Make the positioning tool (5), according to the drawing, blank and weld the positioning tool (5) roughness, process the boring bar through hole (54), waist hole (55), installation positioning reference surface (56) and the installation hole on the surface, and keep it ready after passing the acceptance; Step4: Install the correction template (2) on the lower plane of the flange of the rotor support (1), and fix the correction template (2) and the lower plane of the flange of the rotor support (1) together through a set of positioning pin shafts (3), and the axis of the reference hole (9) is collinear with the axis of the pin hole to be repaired on the flange of the rotor support (1); Step5: Place the positioning tool (5) on the upper plane of the flange of the rotor support (1), so that a set of waist holes (55) are aligned with the inner holes of the positioning pin shafts (3); Step6: Install the upper pressing plate (41) on the upper plane of the transverse reference plate (51) of the positioning tool (5), install the lower pressing plate (42) on the lower plane of the correction template (2), and insert the lock screw (43) into the waist hole (55) through the inner hole of the positioning pin shaft (3), and install the lock nut (44) at both ends and lock it; Step7: Install the boring machine (7), the connecting flange (76) of the boring machine (7) is flat with the installation positioning reference surface (56) of the positioning tool (5), and is installed and fixed together by adjusting bolt and nut; Step8: Correct the boring machine (7), so that the axis of the boring machine (7) spindle is consistent with the axis of the correction template (2) reference hole (9), and ensure the concentricity and coaxiality; Step9: Start the boring machine (7) to bore the pin hole on the rotor support (1) for repair, ensure the size and accuracy of the pin hole, and then fix and lock the connecting flange (76) and the positioning tool (5) after the boring machine (7) is corrected; Step10: After the repair of one pin hole is completed, remove the boring machine (7), loosen the clamping device (4), remove the positioning tool (5), insert the bolt into the auxiliary installation hole (10) at the end face of the positioning pin shaft (3), hammer the bolt head, remove the positioning pin shaft (3) at the same time, remove the correction template (2), repeat Step4~9, and complete the repair of the next pin hole to be repaired on the rotor support (1).

Images