A method for efficiently installing positioning ribs and a measuring tool for stator positioning ribs

Abstract

The invention discloses an efficient installation method of positioning ribs and a measuring tool for stator positioning ribs, and provides a measuring tool to adjust the positioning ribs during the installation process. The chord deviation caused by machining accuracy and measurement error in the installation of large equally divided positioning ribs is effectively reduced; the construction efficiency is effectively improved, and after the installation of the upper and lower rings of the large equally divided positioning ribs is completed, the installation of the small equally divided positioning ribs can be started; the verticality of the positioning ribs can be effectively controlled, and the quality problem of the overall tilt will not be affected.

Description

Technical Field

[0001] The invention relates to the field of mechanical installation tools, and in particular to an efficient installation method for positioning ribs and a measuring tool for stator positioning ribs. Background Art

[0002] At present, the technical requirements for hydropower engineering construction are constantly improving. For example, the diameter of the stator unit of a 700-1000MW large-scale hydro-turbine generator set reaches more than ten meters, and there are more than 2,000 points that need to be measured. The size directly affects the subsequent core stacking and stator offline construction quality. Therefore, when the stator positioning ribs are installed, the verticality of the positioning ribs and the spacing between adjacent positioning ribs are required to be controlled within 0.15mm. However, the existing measurement tools have large measurement errors when used and cannot effectively provide data support for construction.

[0003] At the same time, the installation of positioning bars in hydropower engineering construction is mostly carried out by the large equal division method. Due to the large number of positioning bars in large power stations and the large number of equal divisions, the adjustment of the chord distance of each ring is affected by the processing accuracy of the positioning bars, which is easy to produce cumulative errors that affect the installation quality and progress. Therefore, a new installation method is needed to solve the problem of cumulative chord distance errors. Summary of the invention

[0004] The present invention aims to provide a method for efficiently installing positioning ribs and a tool for measuring stator positioning ribs, which are suitable for measuring the chord distance and verticality of positioning ribs, and improve the measurement accuracy of positioning ribs while also improving the measurement efficiency.

[0005] The invention discloses a method for efficiently installing positioning ribs, which includes the following steps:

[0006] Step 1: Install the reference positioning rib on the stator frame and use a single-head spiral jack and C-shaped clamp to initially fix it;

[0007] Step 2: Use the disc measuring tool and the opening measuring tool to measure the verticality of the reference positioning rib by hanging piano wires in the radial and circumferential directions using the electrical measurement method, and make adjustments based on the measurement results. After the reference positioning rib is adjusted to be qualified, install the large equally divided positioning ribs;

[0008] Step 3: Use the open measuring tool to measure the chord distance of the large equally divided positioning ribs and the radius of the circle measuring frame. When the radius meets the conditions, add the chord distance values ​​of each equally divided positioning rib and divide them by the equal number. Adjust the upper and lower rings of the large equally divided positioning ribs again according to the results. After the adjustment is qualified, use electric welding to fix them. The remaining rings are not adjusted for the time being.

[0009] Step 4: Install the small equally divided positioning ribs based on the upper and lower rings of the large equally divided positioning ribs;

[0010] Step 5: While installing the small equally divided positioning ribs, adjust the middle ring of the large equally divided positioning ribs. After the adjustment is completed, use electric welding to fix the spot welding;

[0011] Step 6: The small equally divided positioning ribs are based on the large equally divided positioning ribs, and are adjusted on the basis of equally divided chord distances of each positioning rib. After each position is installed, it is fixed with spot welding using electric welding;

[0012] Step 7: Remeasure all positioning ribs to complete the installation.

[0013] As an optimal technical solution, in step 2, the specific method for hanging the large equal-divided positioning ribs is: based on the theoretical value of the chord distance of the large equal-divided positioning ribs, take the reference positioning ribs as the starting point, install 1 / 3 of the large equal-divided positioning ribs clockwise, then install 1 / 3 of the large equal-divided positioning ribs counterclockwise, and finally install the remaining parts.

[0014] As a preferred technical solution, in step 3, first use an open measuring tool to adjust the chord distance based on the reference rib diameter, and check the radius at the same time. After the adjustment is completed, replace the short inside diameter micrometer to measure the verticality of the upper and lower points on the side. When measuring the verticality of the side, use a disc measuring tool to check the verticality of the front of the locating rib. After all indicators are qualified, spot weld the locating rib and remeasure the size. After confirming that it meets the requirements, adjust the next large equally divided locating rib.

[0015] As a preferred technical solution, the disc measuring tool includes a disc base, an inside diameter micrometer connected to the disc base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the positioning rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the positioning rib; there is an opening in the middle of the disc base, and the inner wall of the opening is tapped, and the disc base is connected to the inside diameter micrometer through the opening.

[0016] As a preferred technical solution, the open measuring tool includes an open base, an inside diameter micrometer connected to the open base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the positioning rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the positioning rib; an opening is provided on the connecting surface of the open base, and the inner wall of the opening is tapped, and the open base is connected to the inside diameter micrometer through the opening.

[0017] The present invention also provides a measuring tool for stator locating ribs, the measuring tool comprising a measuring base, an inside diameter micrometer connected to the measuring base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the locating rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the locating rib.

[0018] As a preferred technical solution, the measuring base includes a disc base, a hole is provided in the middle of the disc base, and the inner wall of the hole is tapped, and the disc base is connected to the inner diameter micrometer through the hole.

[0019] As a preferred technical solution, the diameter of the disc base is 1 / 2 of the width of the positioning rib.

[0020] As a preferred technical solution, the measuring base includes an open base, a connecting surface of the open base is provided with an opening, and the inner wall of the opening is tapped, and the open base is connected to the inside diameter micrometer through the opening.

[0021] As a preferred technical solution, the dove-tail contact surface between the open base and the positioning rib is an arc surface; the width of the arc surface is greater than the width of the dove-tail arc surface by 0.5 mm.

[0022] In summary, this solution is suitable for the installation and measurement of locating ribs of most hydro-turbine generators, and has a wide range of applications. In addition, the measurement tool can accurately measure the size of the locating ribs and improve the measurement efficiency. The proposed efficient installation method of locating ribs can effectively reduce the chord deviation caused by machining accuracy and measurement errors in the installation of large equally divided locating ribs; it can effectively improve the construction efficiency. After the installation of the upper and lower rings of the large equally divided locating ribs is completed, the installation of the small equally divided locating ribs can be started; it can effectively control the verticality of the locating ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is an overall schematic diagram of the measuring tool of Embodiment 1;

[0025] Figure 2 is an overall schematic diagram of the opening measurement tool of the first embodiment;

[0026] Figure 3It is a schematic diagram of the disc base and the inner diameter micrometer of the first embodiment;

[0027] Figure 4 It is a schematic diagram of the open base and the inner diameter micrometer of the first embodiment;

[0028] Figure 5 This is a schematic diagram of vertical adjustment of the large equally divided positioning ribs in Example 2;

[0029] Figure 6 This is a schematic diagram of adjusting the chord distance of the large equally divided positioning ribs in Example 2;

[0030] Figure 7 This is a schematic diagram of adjusting the large equally divided positioning ribs of the second embodiment;

[0031] Figure 8 It is a schematic diagram of a fine-tuning tool of Embodiment 2;

[0032] icon:

[0033] 1-piano wire, 2-stator base, 3-positioning rib, 4-disc measuring tool, 5-earphones, 6-hanger, 7-opening measuring tool, 8-inside micrometer, 9-disc base, 10-opening base, 11-reference positioning rib, 12-large equally divided positioning rib, 13-small equally divided positioning rib, 14-large equally divided positioning rib upper ring, 15-large equally divided positioning rib upper ring, 16-circle measuring frame, 17-fine-tuning tool. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] like Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, an efficient installation method for positioning ribs is provided, including the following processes:

[0038] Step 1: Before installation, check the straightness and torsion of the positioning ribs on the validation platform. After passing the test, start installation.

[0039] Step 2: Install the +Y direction reference positioning rib 11 on the stator frame 2 and use a single-head spiral top column and a C-shaped clamp to initially fix it;

[0040] Step 3, using the disc measuring tool 4 and the opening measuring tool 7 to hang the piano wire 1 in the radial and circumferential directions of the reference positioning rib 11, the verticality is measured by the electrical measurement method, and adjustments are made according to the measurement results. After the reference positioning rib 11 is adjusted to be qualified, 17 large equally divided positioning ribs 12 are hung;

[0041] Step 4, measure the chord distance of the large equally divided positioning rib 12 by the open measuring tool 7 and measure the radius by the circle measuring frame 16. After the radius meets the conditions, add the chord distance values ​​of the equally divided positioning ribs and divide them by the equal fraction, and use the result as the actual chord distance value. Adjust the upper ring 14 of the large equally divided positioning rib and the lower ring 15 of the large equally divided positioning rib again according to the result. After the adjustment is qualified, use electric welding to fix them. The remaining rings are not adjusted temporarily and are fixed with a single-head spiral top column and a fine-tuning tool 17; after the adjustment of the upper ring 14 of the large equally divided positioning rib and the lower ring 15 of the large equally divided positioning rib meets the requirements, adjust the verticality and radius of the large equally divided positioning rib 12 by the circle measuring frame 16 and the disc measuring tool 4;

[0042] Step 5, installing the small equally divided positioning ribs 13 based on the large equally divided positioning rib upper ring 14 and the large equally divided positioning rib lower ring 15;

[0043] Step 5: While installing the small equally divided positioning ribs 13, adjust the middle ring of the large equally divided positioning ribs 12 by using the opening measuring tool 7, the disc measuring tool 4 and the fine-tuning tool 17. After the adjustment is completed, use electric welding to fix the spot welding, and re-measure the radius, chord distance and torsion at the same time;

[0044] Step 6: The small equally divided positioning ribs 13 are based on the large equally divided positioning ribs 12, and are adjusted on the basis of equally divided chord distances of each positioning rib. After installation, they are fixed with spot welding using electric welding;

[0045] Step 7: Remeasure all positioning ribs to complete the installation.

[0046] Specifically, in step 2, the method for hanging the large equal-divided positioning ribs is: based on the theoretical value of the chord distance of the large equal-divided positioning ribs 12, take the reference positioning rib 11 as the starting point, install 1 / 3 of the large equal-divided positioning ribs 12 clockwise, then install 1 / 3 of the large equal-divided positioning ribs 12 counterclockwise, and finally install the remaining part.

[0047] In step 3, first use the open measuring tool 7 to adjust the chord distance based on the reference positioning rib diameter, and check the radius at the same time. After the adjustment is completed, replace the short inside diameter micrometer to measure the verticality of the upper and lower points of the side. When measuring the verticality of the side, use the disc measuring tool 4 to check the verticality of the front of the large equally divided positioning rib 12. After all indicators are qualified, spot weld the positioning ribs and remeasure the dimensions. After confirming that they meet the requirements, adjust the next large equally divided positioning rib 12.

[0048] Specifically, in the present embodiment, the disc measuring tool includes a disc base, an inside diameter micrometer connected to the disc base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the positioning rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the positioning rib; there is an opening in the middle of the disc base, and the inner wall of the opening is tapped, and the disc base is connected to the inside diameter micrometer through the opening.

[0049] In this embodiment, the opening measurement tool includes an opening base, an inside diameter micrometer connected to the opening base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the positioning rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the positioning rib; an opening is provided on the connecting surface of the opening base, and the inner wall of the opening is tapped, and the opening base is connected to the inside diameter micrometer through the opening.

[0050] By adopting the positioning rib installation method of this embodiment, the chord distance deviation caused by machining accuracy and measurement error in the installation of large equally divided positioning ribs can be effectively reduced; the verticality of the positioning ribs can be controlled while effectively improving the construction efficiency.

[0051] Example 2

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment proposes a stator locating rib measuring tool, which is used to measure the size of the locating rib 3 on the stator frame 2 of a large hydropower unit. Since the traditional tools for measuring the locating rib 3 are all point-to-point measurements, the measurement results have large errors. Based on this, this embodiment invents a disc measuring tool 4 and an open measuring tool 7. During actual measurement, the inside micrometer 8 is connected to the disc base 9 or the open base 10, and surface contact measurement is achieved through base conversion, which solves the disadvantage of large point-to-point measurement reference error.

[0053] It should be noted that the base of the inside micrometer 8 can be replaced or the length of the ruler can be adjusted according to different measurement requirements.

[0054] The measuring tool mentioned above includes a measuring base, an inner diameter micrometer 8 connected to the measuring base, a piano wire 1, and an auxiliary probe; the auxiliary probe is connected to the piano wire 1 and the inner diameter micrometer 8, the piano wire 1 is suspended on the front or side of the positioning rib 3, and the suspension angle of the piano wire 1 is consistent with the front or dove tail direction of the positioning rib 3. Commonly, the auxiliary probe is an earphone 5.

[0055] According to different measurement requirements, two measuring bases are designed, including a disc base 9 and an open base 10. The inside micrometer 8 is connected to the disc base to form a disc measuring tool 4, and the inside micrometer 8 is connected to the open base to form an open measuring tool 7.

[0056] There is an opening in the middle of the disc base, and the inner wall of the opening is tapped, and the disc base 9 is connected to the inner diameter micrometer 8 through the opening. The diameter of the disc base 9 is 1 / 2 of the width of the positioning rib.

[0057] An opening is provided on the connection surface between the open base 10 and the inside micrometer 8, and the inner wall of the opening is tapped, and the open base 10 is connected to the inside micrometer 8 through the opening. The dove-tail contact surface between the open base 10 and the positioning rib 3 is an arc surface. The width of the arc surface is 0.5mm larger than the width of the dove-tail arc surface of the positioning rib 3, and the opening angle is slightly larger than the dove-tail angle of the positioning rib 3. Since the arc surface measurement reference point is easy to slide, affecting the measurement accuracy, the measuring base designed on the front side of the positioning rib 3 is the reference control surface, which needs to be firmly attached. The other end of the inside micrometer 8 is the measuring end, which moves up and down to measure the chord distance of the positioning rib 3.

[0058] In order to facilitate the understanding and implementation of those skilled in the art, the specific implementation method of the measuring tool of this embodiment in actual measurement use is given below, and the measurement of the positioning rib 3 during the installation and maintenance of a 1000WM large unit is used as an example for explanation below:

[0059] The above-mentioned measuring tool includes an internal diameter micrometer 8, a disc base 9 with a diameter of 1 / 2 the width of the positioning rib, a surface finish of the contact surface with the positioning rib 3 of ≤3.2, a diameter of the disc base 9 greater than 1.5 times the diameter of the internal diameter micrometer 8 and less than the front width of the positioning rib 3, and an opening tapping with the same size as the internal diameter micrometer 8;

[0060] The opening on the open base 10 has an inner wall with the same tapping size as the inner diameter micrometer 8, a processing finish ≤6.3, a bulge of 2mm on the arc surface, a width of 0.5mm larger than the width of the dove-tail arc surface of the positioning rib 3, an opening angle slightly larger than the dove-tail angle of the positioning rib 3, and a diameter of the piano wire 1 of 0.3mm.

[0061] In one measurement method, first, the inside diameter micrometer 8 is connected to the disc base 9, the piano wire 1 is suspended by the hanger 6 within the effective range of measurement on the front or side of the positioning rib 3, the headphone wire is connected to the piano wire 1 and the inside diameter micrometer 8 respectively, the connected measuring tool 4 is placed against the positioning rib 3, and the distance from the positioning rib 3 to the piano wire 1 is measured by sliding left and right to complete the measurement of each point, and then the readings are compared to determine the verticality. Using the headphones 5 to assist can reduce the measurement error caused by the inability to confirm the reference point on one side of the positioning rib 3.

[0062] In another measurement method, first connect the inside micrometer 8 to the open base 10, align one side of the opening with the dove tail of the positioning rib 3, press the open base 10 tightly, align the measuring end with the dove tail of the adjacent positioning rib 3, move up and down to measure the minimum distance, and repeat this operation process until the measurement is completed.

[0063] In another measurement method, first connect the inside micrometer 8 to the open base 10, hang the piano wire 1 through the hanger 6 in the dove tail direction of the front or side of the positioning rib 3, and connect the headphone wire 5 to the piano wire 1 and the inside micrometer 8 respectively. Align one side of the opening with the dove tail of the positioning rib 3, press the open base 10 tightly, and face the measuring end to the piano wire 1. Move up and down to measure the minimum distance. After measuring each point, compare the readings to determine the verticality.

[0064] It should be noted that the two measuring bases can be used interchangeably on one internal diameter micrometer 8, and internal diameter micrometers 8 of the same model and of various lengths can be used in accordance with the chord distances of different positioning ribs 3.

[0065] In summary, this solution is applicable to the installation and measurement of the locating ribs 3 of most hydro-turbine generators and has a wide range of applications. Furthermore, the measurement tool 4 and the measurement tool 7 can accurately measure the size of the locating ribs 3 while having a high measurement efficiency.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for efficiently installing positioning ribs, characterized in that: The process includes: Step 1: Install the reference positioning rib on the stator frame and use a single-head spiral jack and C-shaped clamp to initially fix it; Step 2: Use the disc measuring tool and the opening measuring tool to measure the verticality of the reference positioning rib by hanging piano wires in the radial and circumferential directions using the electrical measurement method, and make adjustments based on the measurement results. After the reference positioning rib is adjusted to be qualified, install the large equally divided positioning ribs; Step 3, measure the chord distance of the large equally divided positioning ribs and the radius of the circle measuring frame by using an open measuring tool. After the radius meets the conditions, add the chord distance values ​​of each equally divided positioning rib and divide them by the equal number, and adjust the upper and lower rings of the large equally divided positioning ribs again according to the results. After the adjustment is qualified, use electric welding to fix them. The remaining rings are not adjusted for the time being and are fixed using a single-head spiral jack and a fine-tuning tool; after the adjustment of the upper ring and the lower ring of the large equally divided positioning ribs meets the requirements, use the circle measuring frame and the disc measuring tool to adjust the verticality and radius of the large equally divided positioning ribs; Step 4: Install the small equally divided positioning ribs based on the upper and lower rings of the large equally divided positioning ribs; Step 5: While installing the small equally divided positioning ribs, adjust the middle ring of the large equally divided positioning ribs. After the adjustment is completed, use electric welding to fix the spot welding, and re-measure the radius, chord distance, and torsion; Step 6: The small equally divided positioning ribs are based on the large equally divided positioning ribs. Adjustments are made on the basis of equally divided chord distances of each positioning rib. After installation, use electric welding to fix the spot welding; Step 7: Remeasure all positioning ribs to complete the installation.

2. The method for efficiently installing positioning ribs according to claim 1, characterized in that: In step 2, the specific method for hanging the large equal-divided positioning ribs is: according to the theoretical value of the chord distance of the large equal-divided positioning ribs, take the reference positioning ribs as the starting point, install 1 / 3 of the large equal-divided positioning ribs clockwise, then install 1 / 3 of the large equal-divided positioning ribs counterclockwise, and finally install the remaining parts.

3. The method for efficiently installing positioning ribs according to claim 1, characterized in that: In step 3, first use an open measuring tool to adjust the chord distance based on the reference rib diameter, and check the radius at the same time. After the adjustment is completed, replace the short inside diameter micrometer to measure the verticality of the upper and lower points on the side. When measuring the verticality of the side, use a disc measuring tool to check the verticality of the front of the locating rib. After all indicators are qualified, spot weld the locating rib and remeasure the size. After confirming that it meets the requirements, adjust the next large equally divided locating rib.

4. The efficient installation method for positioning ribs according to claim 1 or 3, characterized in that: The disc measuring tool includes a disc base, an inside diameter micrometer connected to the disc base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the positioning rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the positioning rib; there is an opening in the middle of the disc base, and the inner wall of the opening is tapped, and the disc base is connected to the inside diameter micrometer through the opening.

5. The efficient installation method of positioning ribs according to claim 4 is characterized in that: The opening measurement tool includes an opening base, an inside diameter micrometer connected to the opening base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside diameter micrometer on the other side, the piano wire is suspended on the front or side of the positioning rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the positioning rib; an opening is provided on the connecting surface of the opening base, and the inner wall of the opening is tapped, and the opening base is connected to the inside diameter micrometer through the opening.

6. A measuring tool for stator positioning ribs, characterized in that: In the efficient installation method for locating ribs applied to any one of claims 1 to 5, the measuring tool includes a measuring base, an inside micrometer connected to the measuring base, a piano wire, and an auxiliary probe; the auxiliary probe is connected to the piano wire on one side and to the inside micrometer on the other side, the piano wire is suspended from the front or side of the locating rib, and the hanging angle of the piano wire is consistent with the front or dove tail direction of the locating rib.

7. The stator positioning rib measuring tool according to claim 6, characterized in that: The measuring base comprises a disc base, an opening is provided in the middle of the disc base, the inner wall of the opening is tapped, and the disc base is connected to the inner diameter micrometer through the opening.

8. The stator positioning rib measuring tool according to claim 7, characterized in that: The diameter of the disc base is 1 / 2 of the width of the positioning rib.

9. The stator positioning rib measuring tool according to claim 6, characterized in that: The measuring base comprises an open base, a connecting surface of the open base is provided with an opening, an inner wall of the opening is tapped, and the open base is connected to the inner diameter micrometer through the opening.

10. The stator positioning rib measuring tool according to claim 9, characterized in that: The dove-tail contact surface between the open base and the positioning rib is an arc surface; the width of the arc surface is greater than the width of the dove-tail arc surface by 0.5 mm.

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