High-precision measuring device and measuring method for roundness of rotor of suspension type generator set

Abstract

The invention belongs to the technical field of mechanical and electrical installation, and discloses a suspension type generator set rotor roundness high-precision measuring device and measuring method. The suspension type generator set rotor roundness high-precision measuring device is composed of a center body, a balancing weight, a balance arm, a measuring arm, a supporting base, an alignment connecting plate, an eccentric adjustment axial supporting guide wheel mechanism, a lower adjustable radial sliding block mechanism, an upper adjustable radial sliding block mechanism, a lower radial fixing sliding block, a supporting ring, a measuring rod and a meter frame. The measuring process method comprises the five steps of supporting seat positioning, center body installation, measurement arm and balance arm installation, meter alignment and measurement. According to the invention, roundness measurement in the rotor assembly process of the suspension type unit can be rapidly and accurately completed, the measurement efficiency is extremely high, the measurement precision is extremely high, the production cost can be effectively reduced, and the production efficiency is remarkably improved. Meanwhile, according to the measuring method provided by the invention, the high-altitude operation time of operators can be greatly shortened, and the safety of equipment and personnel is effectively protected.

Description

Technical Field

[0001] The invention relates to the technical field of generator rotor installation technology, and in particular to a high-precision roundness measuring device and a measuring method for a suspended generator set rotor. Background Art

[0002] The rotor assembly of suspended structure hydropower unit is composed of main shaft (generally integrated with rotor bracket), yoke, pole and other parts. The yoke is made of yoke punching or rigid yoke segment stacked on site, and the pole is mounted after the yoke is stacked to form a complete rotor. The rotor radius varies, the largest can reach several meters, and the smallest is less than one meter, but the requirements for the radius size are very high during the whole rotor installation process. Generally speaking, the measurement accuracy is required to reach 0.02mm, so as to ensure that the installation quality of the whole rotor meets the relevant requirements.

[0003] In the past, in order to achieve measurement accuracy during the rotor installation process, the wire measurement method was often used to measure each measurement point one by one. The main principle is to use the wire, the ruler and the workpiece to establish an electrical circuit, and connect an earphone in series in the circuit. When the circuit is turned on, the earphone will make a sound under the action of the current. By adjusting the length and position of the ruler, such a point is found, which is the critical point between the circuit just turned on and off, that is, the minimum distance between the wire and the workpiece. This method is time-consuming and labor-intensive, and has high requirements for measurement personnel. At the same time, due to different personal hearing conditions and operational proficiency, it is difficult for different personnel to measure the data. In engineering practice, it is often necessary for multiple people to measure repeatedly to reduce errors.

[0004] At present, the wire-hanging measurement method is widely used in engineering practice due to its simple structure, operability and relatively high measurement accuracy. However, due to the large number of measurement points, the measurement process is time-consuming and labor-intensive, which is not conducive to improving production efficiency. Summary of the invention

[0005] In view of this, the present invention aims at the deficiencies in the above-mentioned prior art and provides a high-precision measurement device and method for the roundness of the rotor of a suspended generator set, so as to solve the problems in the prior art of long measurement cycle, poor measurement accuracy, low production efficiency, etc. during the rotor installation process.

[0006] The objective of the present invention is achieved through the following technical solutions: a high-precision measuring device for the roundness of a rotor of a suspended generator set is composed of a center body, a counterweight, a balance arm, a measuring arm, a support seat, an alignment connecting plate, an eccentric adjustment axial support guide wheel mechanism, a lower adjustable radial slider mechanism, an upper adjustable radial slider mechanism, a lower radial fixed slider, a support ring, a measuring rod, and a meter frame; the center body is provided with an interface with an eccentric adjustment circumferential support guide wheel mechanism, a lower adjustable radial slider mechanism, an upper adjustable radial slider mechanism, a lower radial fixed slider, a support ring, a balance arm, and a measuring arm; the counterweight is provided with a circular hole passing through the balance arm; the balance arm is provided with a flange and a corresponding hole engaged with the center body; one end of the measuring arm is provided with a flange and a corresponding hole engaged with the center body; the other end is provided with three places engaged with the measuring The flange and corresponding hole for fixing the measuring rod, the support seat is provided with a fixing hole for fixing with the eccentric adjustment axial support guide wheel mechanism, the support seat adopts a petal structure, and the joint is provided with a fixing bolt hole and an alignment connecting plate fixing hole, the alignment connecting plate is provided with a fixing hole corresponding to the support seat, the eccentric adjustment axial support guide wheel mechanism is mainly composed of a bearing seat, an eccentric shaft and a deep groove ball bearing, the upper adjustable radial slider mechanism and the lower adjustable radial slider mechanism are composed of a bearing shell, an adjusting bolt and a locking nut, the lower radial fixed slider is composed of a bearing shell, a gasket, an adjusting bolt and a locking nut, the support ring is provided with a hole for fixing with the center body, the measuring rod is provided with a flange and a fixing hole for fixing with the measuring arm, and the table frame is provided with an interface matching the measuring rod.

[0007] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the central body is made of welded steel plates and is provided with a special lifting point.

[0008] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, a rectangular hole of 200mmx500mm is provided on the side wall of the central body corresponding to the positions of the lower adjustable radial slider mechanism, the upper adjustable radial slider mechanism and the lower radial fixed slider.

[0009] In the above-mentioned high-precision measuring device for the roundness of the rotor of the suspended generator set, a circle of radial slider installation positions evenly distributed at 90° are respectively provided near the upper and lower end surfaces of the central body.

[0010] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, one end of the balance arm is provided with a flange and bolt holes for fixing with the center body, and the other end is provided with a bracket for installing and adjusting the counterweight block.

[0011] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the counterweight blocks can achieve the balance of the entire device by adjusting the number and position of the counterweight blocks when the measuring rod is in different positions.

[0012] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the measuring arm should set three measuring rod installation positions according to the size from the main rib of the rotor bracket to the center, the size from the outer edge of the yoke to the center, and the radius size after the rotor pole is installed.

[0013] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the measuring arm has a certain length adjustability.

[0014] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the flatness of the support seat does not exceed 0.02mm, the outer diameter is more than 100mm larger than the outer diameter of the center body, and four eccentric adjustment axial support guide wheel mechanism installation positions are evenly distributed around the circumference.

[0015] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the circumferential adjustment range of the eccentric adjustment axial support guide wheel mechanism is not less than 2 mm.

[0016] In the above-mentioned high-precision measuring device for the roundness of the rotor of the suspended generator set, the upper adjustable radial slider mechanism is evenly distributed around the circumference, and when adjusted to the maximum radius, the gap between the shoe surface and the sliding surface is not less than 10 mm.

[0017] In the above-mentioned high-precision measuring device for the roundness of the rotor of a suspended generator set, the lower adjustable radial slider mechanism and the lower radial fixed slider are evenly distributed on the same pitch circle of the center body, wherein two sets of the lower adjustable radial slider mechanism are arranged adjacent to each other at 90°, and when adjusted to the maximum radius, the gap between the shoe surface and the sliding surface is not less than 10 mm, and the two sets of the lower radial fixed slider mechanisms are arranged adjacent to each other at 90°.

[0018] In the above-mentioned high-precision measuring device for the roundness of the rotor of the suspended generator set, the roughness of the upper and lower surfaces of the support ring does not exceed Ra1.6, the parallelism does not exceed 0.02mm, and the flatness does not exceed 0.02mm.

[0019] The present invention also provides a method for measuring the roundness of a suspended generator rotor with high precision, which uses the above-mentioned method for measuring the roundness of a suspended generator rotor with high precision, and comprises the following steps:

[0020] S1. Position the support seat. Mark the installation position of the support seat at the appropriate position on the shaft. Install the two halves of the support seat at the marked positions respectively. Use the joint bolts to initially close the two halves of the support seat to make them a whole. Install and align the connecting plate. Gradually adjust the support seat so that the plane level is less than 0.02mm / m, and tighten the joint bolts.

[0021] S2. Install the center body, lower all eccentric adjustment bearings to the lowest position, hoist the center body and place it on the support seat, slowly tighten the two sets of lower adjustable radial slider mechanisms, with a bearing clearance of 0.05mm, use the eccentric shaft to adjust the level of the circle measuring frame to within 0.03mm, slowly tighten the upper adjustable radial slider mechanism, taking into account the level of the center body and the concentricity with the main shaft during the tightening process, and after the fine adjustment of the circle measuring frame is qualified, lock the locking nuts of the upper and lower adjustable radial slider mechanisms.

[0022] S3. Install the measuring arm, balancing arm, etc. Install the measuring arm and balancing arm, and install the measuring rod as needed. After the measuring rod is installed, adjust the counterweight on the balancing arm to the corresponding position and lock it, install the meter stand to the appropriate position, and set up the dial indicator.

[0023] S4. Align the dial indicator, determine the reference measuring point, accurately adjust the position and reading of the dial indicator, push the balance arm, and make the measuring frame slowly rotate clockwise for one circle when looking down, return to the reference measuring point, and compare the reading at this time with the initial reading. The difference is within the allowable range of about 0.03mm.

[0024] S5. Measure, slowly push the balance arm to rotate the circular measuring frame, measure and record each measuring point in turn, and finally rotate one circle to return to the reference measuring point.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] The rotor structure of suspended hydropower units is complex, with many processes and different rotor radius sizes, ranging from several meters to less than one meter. However, the requirements for the radius size are very high during the entire rotor installation process, and the measurement accuracy reaches more than 0.02mm, so as to ensure that the installation quality of the entire rotor meets the relevant requirements. In the past, in order to achieve measurement accuracy during the rotor installation process, the wire measurement method of hanging each measurement point was often used. This method is time-consuming and labor-intensive, and has high requirements for measurement personnel. At the same time, due to different personal hearing conditions and operational proficiency, the data measured by different personnel are difficult to match each other. In engineering practice, it is often necessary for multiple people to measure repeatedly and reduce errors through multiple measurements. The measurement process is time-consuming and labor-intensive, which is not conducive to improving production efficiency.

[0027] The device of the present invention is easy to disassemble, install and debug, and can realize fast and accurate measurement of all roundness-related data during the rotor installation process, solving the problems of long measurement cycle, poor measurement accuracy, low production efficiency, etc. in the prior art during the rotor installation process. By comparing time and cost, the measurement method provided by the present invention has extremely high measurement efficiency and measurement accuracy compared with traditional wire hanging measurement, and the measurement time is less than 10% of the wire hanging measurement, which can effectively reduce production costs and significantly improve production efficiency. At the same time, the measurement method provided by the present invention can greatly reduce the operator's high-altitude operation time and effectively protect the safety of equipment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the front view of the high-precision measurement device for the roundness of the rotor of a suspended generator set.

[0029] Figure 2 This is the AA cross-sectional view of the high-precision measuring device for the roundness of the rotor of a suspended generator set.

[0030] Figure 3 This is a partial cross-sectional view of the center body of a high-precision measuring device for the roundness of a suspended generator rotor.

[0031] Figure 4 These are the front and right views of the balance arm of the high-precision measurement device for the roundness of the rotor of a suspended generator set.

[0032] Figure 5 These are the front view, left view and top view of the measuring arm of the high-precision measuring device for the roundness of the rotor of a suspended generator set.

[0033] Figure 6 These are the front and top views of the measuring rod of the high-precision measuring device for the roundness of the rotor of a suspended generator set.

[0034] Figure 7 These are the top view and front view of the support ring of the high-precision measurement device for the roundness of the rotor of a suspended generator set.

[0035] Figure 8 It is the top view and left view of the center body of the high-precision measuring device for the roundness of the rotor of a suspended generator set.

[0036] Fig. 9 These are the top view and front view of the frame of the high-precision measuring device for the roundness of the rotor of a suspended generator set.

[0037] Fig.10 The figure is a measurement flow chart of a high-precision measuring device for the roundness of a suspended generator rotor.

[0038] Description of component numbers in the accompanying drawings:

[0039] 1-center body; 2-counterweight block; 3-balance arm; 4-measuring arm; 5-support seat; 6-alignment connecting plate; 7-eccentric adjustment axial support guide wheel mechanism; 8-lower adjustable radial slider mechanism; 9-upper adjustable radial slider mechanism; 10-lower radial fixed slider; 11-support ring; 12-measuring rod; 13-meter frame DETAILED DESCRIPTION

[0040] 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.

[0041] like Figure 1 As shown, the high-precision measuring device for the roundness of the rotor of a suspended generator set consists of a center body 1, a counterweight 2, a balance arm 3, a measuring arm 4, a support seat 5, an alignment connecting plate 6, an eccentric adjustment axial support guide wheel mechanism 7, a lower adjustable radial slider mechanism 8, an upper adjustable radial slider mechanism 9, a lower radial fixed slider 10, a support ring 11, a measuring rod 12 and a table frame 13. The center body 1 is provided with an interface with the eccentric adjustment circumferential support guide wheel mechanism 7, the lower adjustable radial slider mechanism 8, the upper adjustable radial slider mechanism 9, the lower radial fixed slider 10, the support ring 11, the balance arm 3, and the measuring arm 4. The counterweight 2 is provided with a circular hole passing through the balance arm, and the balance arm 3 is provided with a flange and a corresponding hole that fit with the center body 1. One end of the measuring arm 4 is provided with a flange and a corresponding hole that fit with the center body 1, and the other end is provided with three places for connecting with the measuring rod 12 engaging flanges and corresponding holes, the support seat 5 is provided with an engaging hole for engaging with the eccentric adjustment axial support guide wheel mechanism 7, the support seat 5 adopts a petal structure, and is provided with engaging bolt holes and an alignment connecting plate 6 engaging hole at the joint, the alignment connecting plate 6 is provided with an engaging hole corresponding to the support seat 11, the eccentric adjustment axial support guide wheel mechanism 7 is mainly composed of a bearing seat, an eccentric shaft and a deep groove ball bearing, etc., the upper adjustable radial slider mechanism 9 and the lower adjustable radial slider mechanism 8 are mainly composed of bearing shells, adjusting bolts, locking nuts, etc., the lower radial fixed slider 10 is mainly composed of bearing shells, gaskets, adjusting bolts, locking nuts, etc., the support ring 11 is provided with an engaging hole for engaging with the center body 1, the measuring rod 12 is provided with a flange and an engaging hole for engaging with the measuring arm 4, and the table frame 13 is provided with an interface matching the measuring rod 12.

[0042] like Figure 2 As shown, the flatness of the support seat 5 does not exceed 0.02mm, and the outer diameter is more than 100mm larger than the outer diameter of the center body 1. It adopts a two-petal structure, and the installation position of the axial support guide wheel mechanism 7 is eccentrically adjusted at four locations evenly distributed around the circumference. The joints are connected by bolts, and bolt holes are provided to align with the connecting plate 6.

[0043] like Figure 3 and Figure 8As shown, the central body 1 is welded from steel plates and has a dedicated lifting point. A 200mmx500mm rectangular hole is provided on the side wall corresponding to the lower adjustable radial slider mechanism 8, the upper adjustable radial slider mechanism 9 and the lower radial fixed slider 10. A circle of 90° uniformly distributed radial slider installation positions are provided near the upper and lower end surfaces of the central body 1. Interfaces with the balance arm 3, the measuring arm 4, the support ring 11, the lower adjustable radial slider mechanism 8, the upper adjustable radial slider mechanism 9 and the lower radial fixed slider 10 are provided.

[0044] like Figure 4 As shown, one end of the balance arm 3 is provided with a flange and a bolt hole for engaging with the central body 1, and the other end is provided with a bracket for installing and adjusting the counterweight block 2.

[0045] like Figure 5 As shown, the flange at one end of the measuring arm 4 is provided with a bolt engaging hole, which is engaged with the center body 1, and three installation positions of the measuring rod 12 are set according to the size from the main vertical rib of the rotor bracket to the center, the size from the outer edge of the yoke to the center and the radius size after the rotor pole is installed.

[0046] like Figure 6 As shown, one end of the measuring rod 12 is provided with a flange and a bolt engaging hole, which is connected to the corresponding position of the measuring arm 4 by bolts, and provides support for the table frame 13 at the same time.

[0047] like Figure 7 As shown, the roughness of the upper and lower surfaces of the support ring 11 does not exceed Ra1.6, the parallelism does not exceed 0.02mm, the flatness does not exceed 0.02mm, and a countersunk hole that fits with the central body 1 is provided.

[0048] like Fig. 9 As shown, the meter frame 13 is connected to the measuring rod 12 by bolts and can be axially moved on the measuring rod 12 to provide a virtual support for the magnetic dial indicator.

[0049] A method for measuring the roundness of a suspended unit rotor using the above-mentioned high-precision measuring device is as follows: Figure 1 As shown, the following steps are included:

[0050] S1. Position the support seat 5, mark the installation position of the support seat 5 at the appropriate position on the shaft, install the two halves of the support seat at the marked positions respectively, use the joint bolts to initially close the two halves of the support seat to make them a whole, install and align the connecting plate 6, gradually adjust to make the plane level of the support seat 5 less than 0.02mm / m, and tighten the joint bolts.

[0051] S2. Install the center body 1, adjust all eccentric adjustment axial support guide wheel mechanisms 7 to the lowest position, hoist the center body 1 and place it on the support seat 5, slowly tighten the two sets of lower adjustable radial slider mechanisms 8, the shoe clearance is about 0.05mm, adjust the eccentric adjustment axial support guide wheel mechanism 7 to make the center body level within 0.03mm, slowly tighten the upper adjustable radial slider mechanism 9, and take into account the level of the center body 1 and the concentricity with the main shaft during the tightening process. After the fine adjustment of the center body is qualified, lock the lower adjustable radial slider mechanism 8; the locking nut of the upper adjustable radial slider mechanism 9.

[0052] S3, measuring arm 4, balancing arm 3, etc. are installed. Install measuring arm 4, balancing arm 3, and install measuring rod 12 as needed. After the installation of measuring rod 12 is completed, adjust the counterweight 2 on the balancing arm 3 to the corresponding position and lock it, install the meter stand 13 to the appropriate position, and set up the dial indicator.

[0053] S4. Align the table, determine the reference measuring point, accurately adjust the position and reading of the dial indicator, push the balance arm 3, make the measuring circle frame rotate slowly clockwise in a downward direction, return to the reference measuring point, and compare the reading at this time with the initial reading. Generally, the difference is within the allowable range of about 0.03mm.

[0054] S5, measurement, slowly push the balance arm 3 to rotate the circular measuring frame, measure and record each measuring point in turn, and finally rotate one circle to return to the reference measuring point.

[0055] The device of the present invention is easy to disassemble, install and debug, and can realize fast and accurate measurement of all roundness-related data during the rotor installation process, solving the problems of long measurement cycle, poor measurement accuracy, low production efficiency, etc. in the prior art during the rotor installation process. By comparing time and cost, the measurement method provided by the present invention has extremely high measurement efficiency and measurement accuracy compared with traditional wire hanging measurement, and the measurement time is less than 10% of the wire hanging measurement, which can effectively reduce production costs and significantly improve production efficiency. At the same time, the measurement method provided by the present invention can greatly reduce the operator's high-altitude operation time and effectively protect the safety of equipment and personnel.

[0056] Taking the on-site installation of the rotor of a hydro-turbine generator set in a power station as an example, the size from the main rib of the rotor bracket to the center is 1840mm, the size from the outer edge of the yoke to the center is 2544.5mm, and the radius size of the rotor pole after installation is 2862.5mm, of which there are 10 main ribs and 30 poles. Taking the measurement of the size of the rotor pole after installation as an example, if the traditional wire hanging method is used for measurement, three people are required, and it takes about 15 minutes to install the corresponding tools and measure at each position. It takes about 8 hours to measure all points once. In addition, some measurement points need to be re-measured using the traditional method. In this way, it takes about 12 hours to measure and obtain accurate data once. Using a high-precision measuring device and method for the roundness of a suspended generator rotor introduced in the present invention, only two people are needed for measurement, and it only takes about 1.5 minutes to measure one point. It takes about 50 minutes to complete the measurement, and only one measurement saves 1,000 yuan.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision measuring device for the roundness of a suspended generator rotor, characterized in that: The invention comprises a central body (1), a counterweight (2), a balancing arm (3), a measuring arm (4), a support seat (5), an alignment connecting plate (6), an eccentric adjustment axial support guide wheel mechanism (7), a lower adjustable radial slider mechanism (8), an upper adjustable radial slider mechanism (9), a lower radial fixed slider (10), a support ring (11), a measuring rod (12) and a table frame (13). The central body (1) is provided with interfaces with the eccentric adjustment circumferential support guide wheel mechanism (7), the lower adjustable radial slider mechanism (8), the upper adjustable radial slider mechanism (9), the lower radial fixed slider (10), the support ring (11), the balancing arm (3) and the measuring arm (4); the counterweight (2) is provided with a circular hole passing through the balancing arm; the balancing arm (3) is provided with a flange and a corresponding hole for being fixed to the central body (1); one end of the measuring arm (4) is provided with a flange and a corresponding hole for being fixed to the central body (1), and the other end is provided with three places for being connected to the measuring rod (12). ) a flange and a corresponding hole for engagement and fixing; the support seat (5) is provided with an engagement and fixing hole for engaging with the eccentric adjustment axial support guide wheel mechanism (7); the support seat (5) adopts a split petal structure, and an engagement and fixing bolt hole and an alignment connecting plate (6) engagement and fixing hole are provided at the joint; the alignment connecting plate (6) is provided with an engagement and fixing hole corresponding to the support seat (11); the eccentric adjustment axial support guide wheel mechanism (7) is composed of a bearing seat, an eccentric shaft and a deep groove ball bearing; the upper adjustable radial slider mechanism (9) and the lower adjustable radial slider mechanism (8) are composed of a bearing shell, an adjustment bolt and a locking nut; the lower radial fixed slider (10) is composed of a bearing shell, a spacer, an adjustment bolt and a locking nut; the support ring (11) is provided with an engagement and fixing hole for engagement and fixing with the center body (1); the measuring rod (12) is provided with a flange and an engagement and fixing hole for engagement and fixing with the measuring arm (4); the meter frame (13) is provided with an interface matching the measuring rod (12).

2. The high-precision measuring device for the roundness of a suspended generator rotor according to claim (1), characterized in that: The flatness of the support seat (5) does not exceed 0.02 mm, and the outer diameter is more than 100 mm larger than the outer diameter of the center body (1). A two-petal fixing structure is adopted, and the installation position of the axial support guide wheel mechanism (7) is eccentrically adjusted at four locations evenly distributed around the circumference. The joint is connected by bolts and is provided with bolt holes for fixing with the alignment connection plate (6).

3. The high-precision measuring device for the roundness of a suspended generator rotor according to claim 1 is characterized in that: The central body (1) is welded from steel plates and has a dedicated lifting point. A 200 mm x 500 mm rectangular hole is provided on the side wall corresponding to the positions of the lower adjustable radial slider mechanism (8), the upper adjustable radial slider mechanism (9) and the lower radial fixed slider (10). A circle of radial slider installation positions evenly distributed at 90° are provided near the upper and lower end surfaces of the central body (1), respectively. Interfaces with the balance arm (3), the measuring arm (4), the support ring (11), the lower adjustable radial slider mechanism (8), the upper adjustable radial slider mechanism (9) and the lower radial fixed slider (10) are provided.

4. The high-precision measuring device for the roundness of a rotor of a suspended generator set according to claim 1 is characterized in that: One end of the balancing arm (3) is provided with a flange and a bolt hole for being engaged and fixed with the central body (1), and the other end is provided with a bracket for installing and adjusting the counterweight block (2).

5. The high-precision measuring device for the roundness of a suspended generator rotor according to claim 1, characterized in that: The flange at one end of the measuring arm (4) is provided with a bolt-fitting fixing hole, which is correspondingly fitted and fixed to the central body (1), and three measuring rod (12) installation positions are set according to the size from the main rib of the rotor support to the center, the size from the outer edge of the magnetic yoke to the center, and the radius size of the rotor pole after installation.

6. The high-precision roundness measuring device for a suspended generator rotor according to claim 1, characterized in that: One end of the measuring rod (12) is provided with a flange and a bolt-fitting fixing hole, which is connected to the corresponding position of the measuring arm (4) through bolts, and supports the meter frame (13) at the same time.

7. The high-precision roundness measuring device for a suspended generator rotor according to claim 1, characterized in that: The upper and lower surfaces of the support ring (11) have a roughness not exceeding Ra1.6, a parallelism not exceeding 0.02 mm, and a flatness not exceeding 0.02 mm, and are provided with a countersunk hole for being engaged and fixed with the central body (1).

8. The high-precision measuring device for the roundness of a rotor of a suspended generator set according to claim 1, characterized in that: The meter frame (13) is connected to the measuring rod (12) via bolts and can move axially on the measuring rod (12).

9. A method for measuring the roundness of a suspended generator rotor with high precision, using the device for measuring the roundness of a suspended generator rotor with high precision as claimed in claims 1 to 8, characterized in that The following steps are involved: S1. Position the support seat (5). Mark the installation position of the support seat (5) at the appropriate position on the shaft body. Install the two halves of the support seat at the marked positions respectively. Use the joint bolts to initially fix the two halves of the support seat to form a whole. Install and align the connecting plate (6). Gradually adjust the support seat (5) so that the upper plane is less than 0.02 mm / m, and tighten the joint bolts. S2. Install the center body (1), adjust all eccentric adjustment axial support guide wheel mechanisms (7) to the lowest position, hoist the center body (1) so that it falls on the support seat (5), slowly tighten the two sets of lower adjustable radial slider mechanisms (8), the shoe gap is 0.05mm, adjust the eccentric adjustment axial support guide wheel mechanism (7) so that the center body level is within 0.03mm, slowly tighten the upper adjustable radial slider mechanism (9), and take into account the level of the center body (1) and the concentricity with the main shaft during the tightening process. After the center body is fine-tuned and qualified, lock the locking nut of the lower adjustable radial slider mechanism (8) and the upper adjustable radial slider mechanism (9); S3, installation of the measuring arm (4) and the balancing arm (3), installing the measuring arm (4) and the balancing arm (3), installing the measuring rod (12) as required, after the installation of the measuring rod (12), adjusting the counterweight (2) on the balancing arm (3) to the corresponding position and locking it, installing the meter stand (13) to the appropriate position, and setting up the dial indicator; S4. Align the table, determine the reference measuring point, accurately adjust the position and reading of the dial indicator, push the balance arm (3), make the measuring frame rotate slowly clockwise for one circle when looking down, return to the reference measuring point, and compare the reading at this time with the initial reading. The difference is within the allowable range of about 0.03mm. S5. Measure by slowly pushing the balance arm (3) to rotate the circle measuring frame, measuring and recording each measuring point in turn, and finally rotating one circle to return to the reference measuring point.

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