Hydro-generator stator circle measuring device

Abstract

The utility model discloses a kind of water turbine generator stator roundness measuring device, it is related to the technical field of measuring roundness, including measuring column and generator stator, measuring column is fixed in generator stator, the outside of measuring column is provided with upper shaft sleeve and lower shaft sleeve, the side of upper shaft sleeve and lower shaft sleeve is tile block, the two sides of lower shaft sleeve are connected with push rod and measuring rod respectively, the one end of measuring rod is connected with measuring instrument, the utility model is simple structure, convenient to use, the utility model can be adjusted in axial direction, radial, and measurement error is small.

Description

Technical Field

[0001] This utility model relates to the field of roundness measurement technology, and in particular to a device for measuring the roundness of a hydro-generator stator. Background Technology

[0002] Hydropower generators are very large, and it is extremely difficult to accurately measure the roundness of their internal stators. When installing a hydropower generator, whether the stator roundness meets the requirements directly affects whether the unit can operate safely and stably. Traditional methods of calibrating and measuring stator roundness not only have huge measurement errors, but also require a lot of manpower and time, which seriously affects the on-site installation progress.

[0003] In the prior art, patent publication number CN219223679U discloses a fixture for measuring the center of a generator set, measuring the upper and lower frames, and measuring the stator roundness. This utility model discloses a fixture for measuring the center of a generator set, measuring the upper and lower frames, and measuring the stator roundness, specifically relating to the field of stator measurement. It includes: a base, a stator roundness measuring device installed on the upper end of the base, a data display screen installed on the upper end of the stator roundness measuring device, and the stator roundness measuring device including: a detection component, a placement and positioning component, and a side support frame, with a placement plate installed on the upper inner side of the side support frame. However, this comparative technology still cannot accurately measure the stator roundness of large generators. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing measuring devices use only a single bearing as a rotation support, resulting in poor measurement accuracy. This invention provides an upper and a lower bushing, which have been calibrated with high precision before installation. The upper and lower bushings are then adjusted to meet the requirements of axial and radial accuracy through the upper adjustment structure of this invention.

[0005] Another objective of this invention is to address the limitation of existing measuring devices, which can only measure the roundness in one direction. This invention has multiple limiting rings on the measuring column, and by placing the clamps on different limiting rings, the roundness at multiple heights can be measured.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for measuring the roundness of a hydro-generator stator, comprising a measuring column and a generator stator. The measuring column is fixed inside the generator stator. An upper bushing and a lower bushing are provided on the outside of the measuring column. One side of the upper bushing and the lower bushing is a bearing. A push rod and a measuring rod are respectively connected to both sides of the lower bushing. One end of the measuring rod is connected to a measuring instrument. The measuring column is fixed to a pre-embedded steel plate by ground fastening bolts. The level of the measuring column is adjusted by ground adjusting bolts on the measuring column. The axial position of the measuring rod is adjusted by clamps. The radial position of the bushing is finely adjusted by adjusting screws on the bearings. During measurement, the measuring rod can be freely rotated in the circumferential direction by pushing the push rod circumferentially. The measuring instrument can be adsorbed onto the end of the measuring rod to measure the roundness of the generator stator.

[0007] Preferably, the lower part of the lower bushing is a clamp, and several limiting rings are distributed on the measuring column. The clamp is placed above the limiting rings. By placing the clamp on different limiting rings, the height of the bushing can be adjusted, thereby measuring the roundness of each height in the stator.

[0008] Preferably, the push rod and the measuring rod are on the same straight line, the push rod and the measuring rod are fixed on the lower bushing, and the upper bushing is provided with a connecting rod to fix the two ends of the push rod and the measuring rod.

[0009] Preferably, the frame formed by the push rod, measuring rod, and connecting rod is a triangular frame.

[0010] Preferably, the bottom of the measuring column is fixed by a pre-embedded steel plate, and one side of the pre-embedded steel plate is fixed by ground fastening bolts.

[0011] Preferably, the other end of the pre-embedded steel plate is a ground adjustment bolt.

[0012] Preferably, several tiles are distributed in a ring inside the upper and lower bushings.

[0013] Preferably, an adjusting screw is connected to the tile.

[0014] Preferably, the circle measuring device is located at the middle position of the generator stator.

[0015] Preferably, the two ends of the generator stator are fixed by support columns.

[0016] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure and is easy to use; the utility model can be adjusted both axially and radially, and the measurement error is small; the utility model does not require other equipment assistance, effectively saving manpower and material resources and improving installation efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 for Figure 1 Sectional view at point AA.

[0019] In the diagram: 1. Embedded steel plate; 2. Ground fastening bolt; 3. Ground adjusting bolt; 4. Measuring column; 5. Clamp; 6. Lower bushing; 61. Upper bushing; 7. Push rod; 8. Measuring rod; 9. Bearing block; 10. Adjusting screw; 11. Generator stator; 12. Support column; 13. Connecting rod; 14. Limiting ring. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. The described embodiments are only some embodiments of this utility model, and not all embodiments.

[0021] Example 1: Refer to Figures 1 to 2 A stator circularity measuring device for a hydro-generator is disclosed. The measuring column 4 is the core component of the entire circularity measuring device, fixed inside the generator stator 11, serving as support and positioning. The measuring column 4 is externally fitted with an upper bushing 61 and a lower bushing 6, which are used to install and fix other measuring components, respectively. The bottom of the measuring column 4 is fixed by a pre-embedded steel plate 1 to ensure its stability during measurement. One side of the pre-embedded steel plate 1 is fixed by a ground fastening bolt 2, and the other end is equipped with a ground adjusting bolt 3. By adjusting the ground adjusting bolt 3, the horizontal position of the measuring column 4 can be precisely adjusted to align it with the central axis of the generator stator 11.

[0022] The upper bushing 61 and lower bushing 6 are important components of the measuring column 4. A bearing 9 is installed on one side of each bushing, and the bearing 9 is connected to the bushing via an adjusting screw 10. The bearing 9 supports and fixes the measuring rod 8, and allows for precise adjustment of the measuring rod 8 by finely adjusting the radial position of the bushing using the adjusting screw 10. Several bearings 9 are arranged in a ring inside the upper bushing 61 and lower bushing 6. This design ensures that the measuring rod 8 is evenly stressed in the circumferential direction, guaranteeing measurement accuracy.

[0023] The lower bushing 6 has push rods 7 and measuring rods 8 connected to its two sides, respectively. Push rods 7 and measuring rods 8 are aligned and fixed to the lower bushing 6. The upper bushing 61 fixes both ends of push rods 7 and measuring rods 8 via connecting rods 13. This design creates a stable triangular frame structure between push rods 7 and measuring rods 8, improving measurement stability and reliability. One end of the measuring rod 8 is connected to a measuring instrument. By circumferentially pushing push rods 7, the measuring rod 8 can rotate freely in the circumferential direction, thus enabling roundness measurement of the generator stator 11. The clamp 5 is a crucial component for adjusting the axial position of the measuring rod 8. The clamp 5 is positioned below the lower bushing 6. By placing the clamp 5 on different limiting rings 14 on the measuring column 4, the height of the bushing can be adjusted, thereby enabling roundness measurement at various heights within the stator. This design allows the roundness measuring device to adapt to measurement needs at different heights, improving the device's versatility and flexibility.

[0024] Before measurement, the measuring column 4 is first fixed to the embedded steel plate 1 using the ground fastening bolts 2. Then, the horizontal position of the measuring column 4 is adjusted using the ground adjusting bolts 3 on the measuring column 4 to ensure that it is aligned with the central axis of the generator stator 11. Next, the axial position of the measuring rod 8 is adjusted using the clamps 5 to position it at the required measurement height. Then, the radial position of the bushing is finely adjusted using the adjusting screws 10 on the bearing block 9 to ensure proper contact between the measuring rod 8 and the inner wall of the generator stator 11.

[0025] During measurement, simply push the push rod 7 circumferentially, and the measuring rod 8 will rotate freely in the circumferential direction. The measuring instrument is attached to the end of the measuring rod 8, and as the measuring rod 8 rotates, the measuring instrument records the roundness data of the inner wall of the generator stator 11 in real time. By analyzing this data, the roundness of the generator stator 11 can be accurately assessed, thus providing a basis for subsequent maintenance and adjustment.

[0026] A clamp 5 is located below the lower bushing 6, and several limiting rings 14 are distributed on the measuring column 4. By placing the clamp 5 on different limiting rings 14, the height of the bushing can be adjusted, thereby measuring the roundness at various heights within the stator. This design allows the roundness measuring device to adapt to measurement needs at different heights, improving the versatility and flexibility of the device.

[0027] The push rod 7 and the measuring rod 8 are on the same straight line and fixed to the lower bushing 6. The upper bushing 61 fixes the two ends of the push rod 7 and the measuring rod 8 through the connecting rod 13. The frame formed by the push rod 7, the measuring rod 8 and the connecting rod 13 is a triangular frame. This structure has high stability and reliability and can effectively reduce errors in the measurement process.

[0028] Several bearing blocks 9 are distributed in a ring inside the upper bushing 61 and the lower bushing 6, and adjusting screws 10 are connected to the bearing blocks 9. By adjusting the radial position of the bushings with the adjusting screws 10, the measuring rod 8 can be precisely adjusted, thereby ensuring the accuracy of the measurement. The circularity measuring device is set in the middle of the generator stator 11. This design allows the measuring rod 8 to make uniform contact with the inner wall of the generator stator 11, thereby achieving comprehensive measurement in the circumferential direction. At the same time, the two ends of the generator stator 11 are fixed by support columns 12. This design further improves the stability of the generator stator 11 during the measurement process.

[0029] This circularity measuring device allows the measuring rod 8 to rotate freely in the circumferential direction by pushing the push rod 7 in the circumferential direction. The measurement process is simple and quick, greatly improving measurement efficiency. By finely adjusting the radial position of the bushing with the adjusting screw 10 on the pad 9 and adjusting the axial position of the measuring rod 8 with the clamp 5, the device can achieve precise adjustment of the measuring rod 8, thereby ensuring the accuracy of the measurement.

[0030] The design of the clamp 5 below the lower bushing 6 and the limiting ring 14 on the measuring column 4 enables the device to adapt to measurement needs at different heights, thus improving the device's versatility.

[0031] The triangular frame structure composed of push rod 7, measuring rod 8 and connecting rod 13, as well as the ring distribution design of tile 9, enable the device to have high stability during the measurement process and effectively reduce measurement errors.

[0032] To ensure the long-term stable operation of the circularity measuring device, regular maintenance and upkeep are necessary. Here are some maintenance and upkeep recommendations: Regularly check the fixing of measuring column 4 to ensure that its connection with the embedded steel plate 1 is firm. At the same time, check the tightness of the ground fastening bolts 2 and ground adjusting bolts 3, and tighten them in time if they are loose.

[0033] Regularly clean components such as the measuring column 4, bushing, and bearing 9 to remove dust and oil from their surfaces. Simultaneously, lubricate the connection between the push rod 7 and the measuring rod 8 to reduce friction and extend the service life of the components.

[0034] Regularly calibrate the measuring instruments to ensure the accuracy of their measurement data. At the same time, check the adjustment function of the adjusting screw 10 and clamp 5 on the tile 9; if any abnormalities are found, adjust or replace them promptly.

[0035] When not in use, the circle measuring device should be stored in a dry, clean environment, avoiding moisture, corrosion, and impact. At the same time, precision components such as measuring instruments should be properly stored to prevent damage.

[0036] Example 2: Refer to Figures 1 to 2 A stator circularity measuring device for a hydro-generator is disclosed. The measuring column 4 is the core component of the entire circularity measuring device, fixed inside the generator stator 11, serving as support and positioning. The measuring column 4 is externally fitted with an upper bushing 61 and a lower bushing 6, which are used to install and fix other measuring components, respectively. The bottom of the measuring column 4 is fixed by a pre-embedded steel plate 1 to ensure its stability during measurement. One side of the pre-embedded steel plate 1 is fixed by a ground fastening bolt 2, and the other end is equipped with a ground adjusting bolt 3. By adjusting the ground adjusting bolt 3, the horizontal position of the measuring column 4 can be precisely adjusted to align it with the central axis of the generator stator 11.

[0037] The material selection for the measuring column 4 is crucial. Typically, the measuring column 4 is made of high-strength steel to ensure sufficient strength and stability during long-term use. Its surface is finely machined to ensure precise fit with the bushing. The diameter and length of the measuring column 4 are customized according to the dimensions of the generator stator 11 to ensure accurate installation inside the stator. The size and shape of the embedded steel plate 1 are also carefully designed to ensure it is firmly fixed to the ground and provides stable support for the measuring column 4. The size and material of the ground fastening bolts 2 and ground adjusting bolts 3 are also rigorously selected to ensure they can withstand the various forces generated during measurement.

[0038] The upper bushing 61 and lower bushing 6 are important components of the measuring column 4. A bearing 9 is installed on one side of each bushing, and the bearing 9 is connected to the bushing via an adjusting screw 10. The bearing 9 supports and fixes the measuring rod 8, and allows for precise adjustment of the measuring rod 8 by finely adjusting the radial position of the bushing using the adjusting screw 10. Several bearings 9 are arranged in a ring inside the upper bushing 61 and lower bushing 6. This design ensures that the measuring rod 8 is evenly stressed in the circumferential direction, guaranteeing measurement accuracy.

[0039] The bushing is typically made of a wear-resistant, high-strength alloy to ensure it does not wear during long-term use. The design of the pads 9 is also crucial; their shape and size are precisely calculated to ensure they evenly support the measuring rod 8. The number and distribution of the pads 9 are also optimized to ensure the measuring rod 8 is subjected to uniform force in the circumferential direction. The adjusting screw 10 allows for fine-tuning of the pads 9's position, enabling precise adjustment of the measuring rod 8. This design not only improves measurement accuracy but also enhances the reliability and stability of the device.

[0040] The lower bushing 6 has push rods 7 and measuring rods 8 connected to its two sides, respectively. Push rods 7 and 8 are collinear and fixed to the lower bushing 6. The upper bushing 61 fixes both ends of push rods 7 and 8 via connecting rods 13. This design creates a stable triangular frame structure between push rods 7 and 8, improving the stability and reliability of the measurement. One end of the measuring rod 8 is connected to a measuring instrument. By circumferentially pushing push rod 7, the measuring rod 8 can rotate freely in the circumferential direction, thus enabling the measurement of the roundness of the generator stator 11.

[0041] The choice of materials for push rod 7 and measuring rod 8 is equally important. They are typically made of high-strength aluminum alloy or stainless steel to ensure sufficient strength and corrosion resistance during measurement. The connection between push rod 7 and measuring rod 8 is carefully designed to prevent loosening or deformation during measurement. The design of connecting rod 13 allows push rod 7 and measuring rod 8 to form a stable triangular frame structure, which not only improves measurement stability but also reduces errors during the measurement process. The selection of measuring instruments is also crucial; high-precision electronic measuring instruments are typically used to ensure the accuracy of the measurement data.

[0042] The clamp 5 is an important component used to adjust the axial position of the measuring rod 8. Positioned below the lower bushing 6, the clamp 5 allows adjustment of the bushing height by placing it on different limiting rings 14 on the measuring column 4, thus enabling roundness measurement at various heights within the stator. This design allows the roundness measuring device to adapt to measurement needs at different heights, improving the device's versatility and flexibility.

[0043] The design of the clamp 5 is crucial; it is typically made of high-strength steel to ensure sufficient strength and stability during long-term use. The number and distribution of the limiting rings 14 are carefully designed to ensure that the clamp 5 can accurately adjust the height of the bushing. The adjustment method of the clamp 5 is optimized to ensure that it can quickly and accurately adjust the axial position of the measuring rod 8. This design not only improves the versatility and flexibility of the device but also enhances its reliability and stability.

[0044] Before measurement, the measuring column 4 is first fixed to the embedded steel plate 1 using the ground fastening bolts 2. Then, the horizontal position of the measuring column 4 is adjusted using the ground adjusting bolts 3 on the measuring column 4 to ensure that it is aligned with the central axis of the generator stator 11. Next, the axial position of the measuring rod 8 is adjusted using the clamps 5 to position it at the required measurement height. Then, the radial position of the bushing is finely adjusted using the adjusting screws 10 on the bearing block 9 to ensure proper contact between the measuring rod 8 and the inner wall of the generator stator 11.

[0045] Place the bottom of the measuring column 4 on the pre-embedded steel plate 1, ensuring it is perpendicular to the ground. Secure the measuring column 4 to the pre-embedded steel plate 1 using the ground fastening bolts 2, ensuring a firm connection. Using the ground adjusting bolts 3 on the measuring column 4, precisely adjust the horizontal position of the measuring column 4 by adjusting the tightness of the bolts, aligning it with the central axis of the generator stator 11. This step is crucial because the horizontal position of the measuring column 4 directly affects the measurement accuracy. Adjust the axial position of the measuring rod 8 using the clamp 5, positioning it at the required measurement height. The clamp 5's design allows for quick and accurate adjustment of the measuring rod 8's position, adapting to measurement needs at different heights. Fine-tune the radial position of the bushing using the adjusting screws 10 on the bearing block 9, ensuring proper contact between the measuring rod 8 and the inner wall of the generator stator 11. This step ensures that the measuring rod 8 is evenly stressed during measurement, thereby improving measurement accuracy.

[0046] During measurement, simply pushing the push rod 7 circumferentially causes the measuring rod 8 to rotate freely in the circumferential direction. The measuring instrument is attached to the end of the measuring rod 8, and as the measuring rod 8 rotates, the measuring instrument records the roundness data of the inner wall of the generator stator 11 in real time. By analyzing this data, the roundness of the generator stator 11 can be accurately assessed, thus providing a basis for subsequent maintenance and adjustment. Pushing the push rod 7 circumferentially allows the measuring rod 8 to rotate freely in the circumferential direction. The design of the push rod 7 and the measuring rod 8 makes the measurement process very smooth, reducing errors during measurement.

[0047] The measuring instrument is attached to the end of the measuring rod 8. As the measuring rod 8 rotates, the measuring instrument records the roundness data of the inner wall of the generator stator 11 in real time. This data can be transmitted to a computer or other devices via a data cable for further analysis and processing. By analyzing the measurement data, the roundness of the generator stator 11 can be accurately assessed. If the roundness is found to be non-compliant, corresponding repairs and adjustments can be made based on the data, thereby ensuring the efficient operation of the generator.

[0048] A clamp 5 is located below the lower bushing 6, and several limiting rings 14 are distributed on the measuring column 4. By placing the clamp 5 on different limiting rings 14, the height of the bushing can be adjusted, thereby measuring the roundness of various heights within the stator. This design allows for careful optimization of the clamp 5 and limiting rings 14 to ensure rapid and accurate adjustment of the bushing height. The number and distribution of the limiting rings 14 are precisely calculated to ensure that the clamp 5 is accurately positioned at the required height. This design not only improves the versatility and flexibility of the device but also enhances its reliability and stability.

[0049] The push rod 7 and measuring rod 8 are aligned on the same straight line and fixed to the lower bushing 6. The upper bushing 61 fixes both ends of the push rod 7 and measuring rod 8 via the connecting rod 13. The frame formed by the push rod 7, measuring rod 8, and connecting rod 13 is a triangular frame. This structure has high stability and reliability, effectively reducing errors during the measurement process. The design of the triangular frame structure has been carefully optimized to ensure sufficient stability and reliability. The connection method between the push rod 7 and measuring rod 8 has been carefully designed to ensure that they will not loosen or deform during the measurement process. The design of the connecting rod 13 enables the push rod 7 and measuring rod 8 to form a stable triangular frame structure. This structure not only improves the stability of the measurement but also reduces errors during the measurement process.

[0050] Several pads 9 are arranged in a ring inside the upper bushing 61 and the lower bushing 6, with adjusting screws 10 connected to the pads 9. By fine-tuning the radial position of the bushings with adjusting screws 10, precise adjustment of the measuring rod 8 can be achieved, thus ensuring measurement accuracy. The design of the pads 9 and adjusting screws 10 has been carefully optimized to ensure precise adjustment of the radial position of the bushings. The number and distribution of the pads 9 have been precisely calculated to ensure that the measuring rod 8 is uniformly stressed in the circumferential direction. The design of the adjusting screws 10 allows for fine-tuning of the position of the pads 9, thereby achieving precise adjustment of the measuring rod 8. This design not only improves measurement accuracy but also enhances the reliability and stability of the device.

[0051] The circularity measuring device is positioned in the middle of the generator stator 11. This design allows the measuring rod 8 to make uniform contact with the inner wall of the generator stator 11, thereby achieving comprehensive measurement in the circumferential direction. Simultaneously, the two ends of the generator stator 11 are fixed by support columns 12, which further improves the stability of the generator stator 11 during the measurement process.

[0052] The installation position of the circularity measuring device was carefully selected to ensure that the measuring rod 8 makes uniform contact with the inner wall of the generator stator 11. The design of the support column 12 was optimized to ensure that the generator stator 11 remains stable during the measurement process. This design not only improves the accuracy of the measurement but also enhances the reliability and stability of the device.

[0053] By finely adjusting the radial position of the bushing using the adjusting screw 10 on the bearing block 9 and adjusting the axial position of the measuring rod 8 using the clamp 5, this device enables precise adjustment of the measuring rod 8, thereby ensuring measurement accuracy. The design of the adjusting screw 10 on the bearing block 9 and the clamp 5 allows for precise adjustment of the measuring rod 8's position, ensuring measurement accuracy. This design ensures that the measuring rod 8 is subjected to uniform force, reducing errors during the measurement process. The selection of the measuring instrument is also crucial; high-precision electronic measuring instruments are typically used to ensure the accuracy of the measurement data. This design results in highly reliable measurement results, providing an accurate basis for subsequent maintenance and adjustments.

[0054] The design of the clamp 5 below the lower bushing 6 and the limiting ring 14 on the measuring column 4 allows the device to adapt to measurement needs at different heights, improving its versatility. The clamp 5 and limiting ring 14 design enable the height of the measuring rod 8 to be quickly and accurately adjusted, thus accommodating measurement needs at different heights. This design allows the roundness measuring device to be widely used in measuring different models of generator stators 11, adapting to generator stators 11 of different sizes and shapes, demonstrating strong versatility. This design allows the roundness measuring device to be used in various application scenarios, enhancing its application value.

[0055] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A device for measuring the circle of a hydroelectric generator stator, characterized in that, It includes a measuring column and a generator stator. The measuring column is fixed inside the generator stator. An upper bushing and a lower bushing are set on the outside of the measuring column. One side of the upper bushing and the lower bushing is a bearing. The two sides of the lower bushing are connected to a push rod and a measuring rod, respectively. One end of the measuring rod is connected to a measuring instrument.

2. A device for measuring the circle of a hydroelectric generator stator according to claim 1, characterized in that, Below the lower bushing is a clamp, and several limiting rings are distributed on the measuring column, with the clamp positioned above the limiting rings.

3. A hydrogenerator stator circle measuring device according to claim 1 or 2, characterized in that The push rod and the measuring rod are on the same straight line. The push rod and the measuring rod are fixed on the lower bushing, and the upper bushing is fitted with a connecting rod to fix the two ends of the push rod and the measuring rod.

4. A hydrogenerator stator circle measuring device according to claim 3, characterized in that The frame formed by the push rod, measuring rod, and connecting rod is a triangular frame.

5. A device for measuring the circle of a hydroelectric generator stator according to claim 1, characterized in that, The bottom of the measuring column is fixed by a pre-embedded steel plate, and one side of the pre-embedded steel plate is fixed by ground fastening bolts.

6. A hydrogenerator stator circle measuring device according to claim 5, characterized in that The other end of the embedded steel plate is a ground adjustment bolt.

7. A hydrogenerator stator circle measuring device according to claim 1, characterized in that Several tiles are distributed in a ring inside the upper and lower bushings.

8. A hydrogenerator stator circle measuring device according to claim 7, characterized in that Adjustment screws are connected to the tile blocks.

9. A stator circle measuring device for a hydro-generator according to claim 1 or 8, characterized in that, The circle measuring device is located in the middle of the generator stator.

10. A hydrogenerator stator circle measuring device according to claim 1 or 8, characterized in that The generator stator is fixed at both ends by support columns.

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