Device for accurately measuring outer diameter of magnet yoke of hydraulic generator and use method

Abstract

The invention discloses a hydro-generator magnet yoke outer diameter accurate measuring device and a use method, and relates to the technical field of hydro-generators, and the hydro-generator magnet yoke outer diameter accurate measuring device is composed of a center body, a measuring column, a jackscrew, a horizontal bead, a rotor roundness measuring frame, a dial indicator and a dial indicator support. The magnetic yoke outer diameter measuring device is suitable for assembling the magnetic yoke of a hydraulic generator and measuring the outer diameter of the magnetic yoke of a pumped storage power generation motor, can accurately complete the measurement work of the outer diameter of the magnetic yoke, has high measurement precision, and can meet the measurement work of the assembling outer diameters of various magnetic yokes. The device has the characteristics of high efficiency, good precision, convenience in mounting and dismounting, reusability and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of hydro-turbine generators, and in particular to a device and a method for accurately measuring the outer diameter of a yoke of a hydro-turbine generator, which is suitable for measuring the outer diameter of a yoke of a hydro-turbine generator and a pumped-storage power generation motor. Background Art

[0002] The yoke of a hydroelectric generator and a pumped storage generator motor is composed of multiple layers of thin steel plates or yoke segments (forgings) stacked together. The eccentricity and verticality of the yoke are calculated by measuring the stacking radius of the unit. With the popularization of the fine standards for hydroelectric generator products, it is necessary to ensure the measurement accuracy of the yoke stacking data and meet the convenience requirements of multi-point measurement of the yoke. It is necessary to provide a yoke outer diameter accurate measurement device and method that can meet both high precision and convenience. Summary of the invention

[0003] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a precise measuring device for the outer diameter of a yoke of a hydro-turbine generator and a method for using the device, which can ensure the measurement accuracy of the yoke stacking data and has the characteristics of high efficiency, convenient installation and disassembly, wide application range and low cost. The present invention is composed of a center body, a measuring column, a first top screw, a second top screw, a level bead, a rotor circle measuring frame, a dial indicator, and a dial indicator bracket. The center body is fixed to the measuring column by threaded cooperation, the center body is connected to the first top screw and the second top screw by lateral threaded holes, the level bead is embedded in the center body, the rotor circle measuring frame is fixed to the flange surface of the rotor bracket by bolts, the dial indicator is fixed to the end of the dial indicator bracket, and the dial indicator bracket and the rotor circle measuring frame are fixed by magnetic adsorption.

[0004] In the above-mentioned precise measurement device for the outer diameter of the yoke of the hydro-turbine generator, a transverse rectangular groove is arranged on the upper plane of the central body, a first longitudinal threaded hole and a second longitudinal threaded hole are arranged on the side, and a through threaded hole is arranged inside.

[0005] In the above-mentioned precise measuring device for the outer diameter of the hydro-generator yoke, the measuring column is provided with a standard thread on the outer surface, the standard thread matches with the through threaded hole of the center body, and a through first guide hole is provided at the rear.

[0006] In the above-mentioned precise measurement device for the outer diameter of the yoke of the hydro-turbine generator, a standard thread is arranged at the front end of the first top screw, the thread cooperates with the first longitudinal threaded hole of the central body, and a through second guide hole is arranged at the rear.

[0007] In the above-mentioned precise measurement device for the outer diameter of the yoke of the hydro-turbine generator, a standard thread is arranged at the front end of the second top screw, the thread cooperates with the second longitudinal threaded hole of the center body, and a through third guide hole is arranged at the rear.

[0008] In the above-mentioned precise measuring device for the outer diameter of the yoke of the hydro-turbine generator, the horizontal bead is composed of a horizontal detection bead, a first base, a first screw, and a second screw. The horizontal detection bead and the first base are integrated into a whole through the first screw and the second screw, and the first base and the transverse rectangular groove are integrated into a whole through the first screw and the second screw.

[0009] In the above-mentioned device for accurately measuring the outer diameter of the yoke of a hydro-turbine generator, the rotor circular measuring frame is composed of a second base, a bearing, a counterweight arm, a measuring arm bracket, a measuring arm, and a counterweight block. The second base is fixed to the lower end surface of the bearing with bolts, the bearing is fixed to the counterweight arm with bolts, the bearing is fixed to the measuring arm bracket with bolts, the measuring arm is fixed to the measuring arm bracket arm with bolts, and the counterweight block and the counterweight arm are positioned and fixed by a stopper.

[0010] In the above-mentioned precise measurement device for the outer diameter of the yoke of the hydro-turbine generator, the dial indicator bracket is attached to the measuring arm by magnetic adsorption and can be axially moved on the measuring arm to provide support for the installation of the magnetic dial indicator.

[0011] The method of using a device for accurately measuring the outer diameter of a hydro-generator yoke is as follows:

[0012] Step 1: Clean the dust and impurities on the surface of the center body, use special tools to clean the impurities in the transverse rectangular groove and the first longitudinal threaded hole and the second longitudinal threaded hole, and install the first top screw in the first longitudinal threaded hole according to the width of the tail slot of the yoke T, and install the second top screw in the second longitudinal threaded hole.

[0013] Step 2: Assemble the center body and the measuring column, and select the screw-in depth of the measuring column appropriately according to the depth of the T-tail groove of the yoke.

[0014] Step 3, assemble the central body and the level bead, place the level detection bead and the first base into the transverse rectangular groove of the central body, and use the first screw and the second screw to integrate the support frame, the first base and the central body into a whole.

[0015] Step 4. Place the center body, measuring column, first top screw, second top screw and level bead into the T-tail slot of the yoke. Use the level bead to adjust the level of the center body within 0.02mm / m. Tighten the measuring column, first top screw and second top screw to fix the whole in the T-tail slot of the yoke.

[0016] Step 5, assemble the rotor circular measuring frame. According to the instructions, assemble the second base, bearing, counterweight arm, measuring arm bracket, measuring arm, and counterweight block into the rotor circular measuring frame, and assemble them on the rotor bracket.

[0017] Step 6: Attach the dial indicator bracket to the measuring arm by magnetic adsorption, and set the dial indicator on the dial indicator bracket so that the indicator head faces the center of the cylindrical surface of the measuring column.

[0018] Step 7: Push the circle measuring frame to measure the radius value of each pole mounting point, and calculate the outer diameter of the yoke at the corresponding point according to the dial indicator reading.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention can meet the requirements of assembling yokes of various sizes and specifications, and can also meet the requirements of convenience for measuring multiple points of the yoke. The center body and the first top screw, the second top screw, and the measuring column are threaded, and the positions of the first top screw, the second top screw, and the measuring column can be freely adjusted, and it is suitable for yokes of various widths and depths. Because the center body is provided with a level bead, it can ensure that the device is in a horizontal state during measurement, and the measurement result is more accurate than the prior art. Therefore, the device has the characteristics of high precision, high efficiency, convenient installation and disassembly, wide application range, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the left view of the device for accurately measuring the outer diameter of the yoke of a hydro-turbine generator.

[0022] Figure 2 A top view of the device for accurately measuring the outer diameter of the yoke of a hydro-turbine generator.

[0023] Figure 3 Detail of the central body.

[0024] Figure 4 Detailed drawing of the measurement column.

[0025] Figure 5 This is the detailed drawing of the first top screw.

[0026] Figure 6 This is a detailed drawing of the second top screw.

[0027] Figure 7 Detail of the level bead.

[0028] Figure 8 This is a detailed drawing of the rotor circular measuring frame.

[0029] Markings in the figure: 100-center body; 200-measuring column; 300-first top screw; 350-second top screw; 400-level bead; 500-rotor measuring frame; 600-dial gauge; 700-dial gauge bracket; 800-magnetic yoke; 900-rotor bracket; 101-transverse rectangular groove; 102-first longitudinal threaded hole; 103-second longitudinal threaded hole; 104-through threaded hole; 105-first joint threaded hole; 106- The second threaded hole; 201-standard thread; 202-first guide hole; 301-first external thread; 302-second guide hole; 351-second external thread; 352-third guide hole; 401-level detection bead; 402-first base; 403-first screw; 404-second screw; 501-second base; 502-bearing; 503-counterweight arm; 504-measuring arm bracket; 505-measuring arm; 506-counterweight block. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, further explanation will be given below in conjunction with the accompanying drawings and specific embodiments, but each embodiment does not constitute a limitation of the present invention. The specific embodiments described in the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] Specific implementation method 1: Figure 1 As shown, a precise measuring device for the outer diameter of a yoke of a hydro-turbine generator comprises a center body 100, a measuring column 200, a first top screw 300, a second top screw 350, a horizontal bead 400, a rotor circle measuring frame 500, a dial indicator 600, and a dial indicator bracket 700. The measuring column 200 is connected to the center body 100 through a through threaded hole 104, the first top screw 300 is connected to the center body 100 through a first longitudinal threaded hole 102, and the second top screw 350 is connected to the center body 100 through a second longitudinal threaded hole 103. The horizontal detection bead 401 and the first base 402 are fixed to the transverse rectangular groove 101 of the center body through a first screw 403 and a second screw 404. The center body is fixed in the T-tail groove of the yoke through the first top screw 300, the second top screw 350, and the measuring column 200.

[0032] In this embodiment, the rotor circular measuring frame 500, the dial indicator 600, and the dial indicator bracket 700 are placed on the outside of the center body 100, and the relative position of the dial indicator and the center body 100 is determined by rotating the measuring arm 505. During the dial indicator measurement process, the accuracy of repeated measurement points must be verified multiple times to be ≤0.02mm, in order to ensure the accuracy of the data.

[0033] Specific implementation method 2: This implementation method further defines the central body 100 described in specific implementation method 1. Figure 3As shown, in this embodiment, a transverse rectangular groove 101 is arranged on the plane of the central body 100, a first engaging threaded hole 105 and a second engaging threaded hole 106 are arranged in the groove, a first longitudinal threaded hole 102 and a second longitudinal threaded hole 103 are arranged on the side, and a through threaded hole 104 is arranged inside.

[0034] The central body 100 in this embodiment is made of Q235 thick steel plate, and the transverse rectangular groove 101 is used to fix the horizontal bead 400. The through threaded hole 104 is used to connect the measuring column 200, and the measuring column 200 can be rotated arbitrarily in the through threaded hole 104 to meet the measurement of the outer diameter of the T-tail of the yoke of different depths. The first longitudinal threaded hole 102 and the second longitudinal threaded hole 103 are set on the side to connect the first top screw 300 and the second top screw 350 to meet the measurement requirements of the outer diameter of the T-tail of the yoke of different widths.

[0035] Specific implementation scheme 3, this implementation scheme further limits the measurement column 200 described in implementation scheme 1, such as Figure 4 As shown, in this embodiment, the outer surface of the measuring column 200 is provided with a standard thread 201 , the standard thread 201 cooperates with the through threaded hole 104 of the central body 100 , and a through first guide hole 202 is provided at the rear.

[0036] In this embodiment, the first guide hole 202 is used as the action point of the small steel column when the pre-tightening force of tightening the measuring column is large and a small steel column is needed to tighten the measuring column 200.

[0037] Specific implementation scheme 4, this implementation scheme further limits the first top screw 300 and the second top screw 350 of implementation scheme 1, such as Figure 5 , Figure 6 As shown, in this embodiment, the first top screw 300 and the second top screw 350 are made of Q235 material, the first top screw 300 is provided with a first external thread 301 at the front end and a second guide hole 302 at the rear end. The second top screw 350 is provided with a second external thread 351 at the front end and a third guide hole 352 at the rear end.

[0038] In this embodiment, when the pre-tightening force of the first jackscrew 300 and the second jackscrew 350 is large and a small steel column is needed to tighten the first jackscrew 300 and the second jackscrew 350, the second guide hole 302 and the third guide hole 352 are used as the action points of the small steel column.

[0039] Specific implementation scheme 5, this implementation scheme further defines the horizontal bead 400 described in implementation scheme 1, such as Figure 7As shown, in this embodiment, the horizontal bead 400 is composed of a horizontal detection bead 401, a first base 402, a first screw 403, and a second screw 404. The horizontal detection bead 401 and the first base 402 are fixed into a whole by the first screw 403 and the second screw 404. The first base 402 and the transverse rectangular groove 101 are fixed into a whole by the first screw 403 and the second screw 404.

[0040] In this implementation scheme, the precision requirement of the level bead 400 is 0.02 mm / m, which ensures that the measuring column and the outer surface of the yoke are always in a vertical and horizontal state, and ensures the accuracy of the outer diameter measurement.

[0041] Specific implementation scheme eight, this implementation scheme is a step-by-step description of the method for using a device for accurately measuring the outer diameter of a hydro-turbine generator yoke in specific implementation scheme one. In this implementation scheme, step 1, clean the dust and impurities on the surface of the center body 100, use a special tool to clean the impurities in the transverse rectangular groove 101 and the first longitudinal threaded hole 102 and the second longitudinal threaded hole 103, and install the first top screw 300 in the first longitudinal threaded hole 102 according to the width of the tail groove of the yoke T, and install the second top screw 350 in the second longitudinal threaded hole 103.

[0042] Step 2: Assemble the central body 100 and the measuring column 200, and select the screw-in depth of the measuring column 200 appropriately according to the depth of the T-tail groove of the magnetic yoke.

[0043] Step 3, assemble the central body 100 and the level bead 400, put the level detection bead 401 and the first base 402 into the transverse rectangular groove 101, and use the first screw 403 and the second screw 404 to fix the first base 402 and the central body 100 into a whole.

[0044] Step 4: Place the center body 100, the measuring column 200, the first top screw 300, the second top screw 350, and the level bead 400 into the T-tail groove of the yoke, use the level bead 400 to adjust the level of the center body 100 within 0.02 mm / m, and fix the measuring column 200, the first top screw 300, and the second top screw 350 in the T-tail groove of the yoke by tightening.

[0045] Step 5, assemble the rotor circular measuring frame 500, and assemble the second base 501, the bearing 502, the counterweight arm 503, the measuring arm bracket 504, the measuring arm 505, and the counterweight block 506 into the rotor circular measuring frame according to the instructions, and assemble it on the rotor bracket 900.

[0046] Step 6: Attach the dial indicator bracket 700 to the measuring arm 505 by magnetic adsorption, and place the dial indicator 600 on the dial indicator bracket 700 so that the dial head faces the center of the cylindrical surface of the measuring column 200.

[0047] Step 7: Push the circle measuring frame to measure the radius of each pole mounting point, and calculate the outer diameter of the yoke at the corresponding point based on the 600 reading of the dial indicator.

[0048] Finally, the protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A device for accurately measuring the outer diameter of a hydro-generator yoke, characterized in that: The invention comprises a central body (100), a measuring column (200), a first top screw (300), a second top screw (350), a level bead (400), a rotor circle measuring frame (500), a dial indicator (600), and a dial indicator bracket (700); the central body (100) and the measuring column (200) are fixed by threaded fit; the central body (100) and the top screw (300) are connected by a lateral threaded hole; the level bead (400) is embedded in the central body (100); the rotor circle measuring frame (500) is fixed to a flange surface (900) on the rotor bracket by bolts; the dial indicator (600) is fixed to the end of the dial indicator bracket (700); and the dial indicator bracket (700) and the rotor circle measuring frame (500) are fixed by magnetic adsorption.

2. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized in that: A transverse rectangular groove (101) is arranged on the upper plane of the central body (100), a first threaded hole (105) and a second threaded hole (106) are arranged in the groove, a first longitudinal threaded hole (102) and a second longitudinal threaded hole (103) are arranged on the side, and a through threaded hole (104) is arranged inside.

3. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized in that: The measuring column (200) is provided with a standard thread (201) on the outer surface, the standard thread (201) matches with the through threaded hole (104) of the central body (100), and a through first guide hole (202) is provided at the rear.

4. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized in that: The front end of the first top screw (300) is provided with a first external thread (301), the first external thread (301) cooperates with the first longitudinal threaded hole (102) of the central body (100), and the rear part is provided with a through second guide hole (302).

5. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized in that: The front end of the second top screw (350) is provided with a second external thread (351), the second external thread (351) cooperates with the second longitudinal threaded hole (103) of the central body (100), and a through third guide hole (352) is provided at the rear.

6. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized in that: The level bead (400) is composed of a level detection bead (401), a first base (402), a first screw (403), and a second screw (404); the level detection bead (401) and the first base (402) are fixed together as a whole by the first screw (403) and the second screw (404); the first base (402) and the transverse rectangular groove (101) are fixed together as a whole by the first screw (403) and the second screw (404).

7. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized by: The rotor circular measuring frame (500) is composed of a second base (501), a bearing (502), a counterweight arm (503), a measuring arm bracket (504), a measuring arm (505), and a counterweight block (506); the second base (501) and the lower end surface of the bearing (502) are fixed by bolts, the bearing (502) and the counterweight arm (503) are fixed by bolts, the bearing (502) and the measuring arm bracket (504) are fixed by bolts, the measuring arm (505) and the measuring arm bracket (504) are fixed by bolts, and the counterweight block (506) and the counterweight arm (503) are positioned and fixed by a stopper.

8. The device for accurately measuring the outer diameter of a hydro-generator yoke according to claim 1 is characterized in that: The dial indicator bracket (700) is attached to the measuring arm (505) by magnetic adsorption and can move axially on the measuring arm (505).

9. A method for using a device for accurately measuring the outer diameter of a hydro-generator yoke, characterized in that: The usage process is as follows: Step 1, clean the dust and impurities on the surface of the central body (100), use a special tool to clean the impurities in the transverse rectangular groove (101) and the first longitudinal threaded hole (102) and the second longitudinal threaded hole (103), install the first top screw (300) in the first longitudinal threaded hole (102) and install the second top screw (350) in the second longitudinal threaded hole (103) according to the width of the tail groove of the magnetic yoke T; Step 2, assembling the central body (100) and the measuring column (200), and selecting the screw-in depth of the measuring column (200) appropriately according to the depth of the T-tail groove of the magnetic yoke; Step 3, assemble the central body (100) and the level bead (400), place the level detection bead (401) and the first base (402) into the transverse rectangular groove (101) of the central body, and use the first screw (403) and the second screw (404) to fix the first base (402) and the central body (100) into a whole; Step 4, placing the central body (100), the measuring column (200), the first top screw (300), the second top screw (350), and the leveling bead (400) into the T-tail groove of the yoke, adjusting the level of the central body within 0.02 mm / m by using the leveling bead (400), and fixing the measuring column (200), the first top screw (300), and the second top screw (350) into the T-tail groove of the yoke by tightening; Step 5, assembling the rotor circular measuring frame (500), assembling the second base (501), the bearing (502), the counterweight arm (503), the measuring arm bracket (504), the measuring arm (505), and the counterweight block (506) to form the rotor circular measuring frame (500), and assembling it on the rotor bracket (900); Step 6: Attach the dial gauge bracket (700) to the measuring arm (505) by magnetic adsorption, and place the dial gauge (600) on the dial gauge bracket (700) so that the gauge head faces the center of the cylindrical surface of the measuring column (200); Step 7: Push the circle measuring frame to measure the radius value of each pole mounting point, and calculate the outer diameter of the yoke at the corresponding point according to the dial indicator reading.

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