A large logarithmic taper roller diameter convexity angle measuring instrument for wind power bearings

Abstract

This invention discloses a measuring instrument for the diameter, convexity, and angle of large logarithmic tapered rollers in wind turbine bearings. It employs a combination of axial calibration positioning on a reference platform and axial measurement positioning on a reference bar, along with four-point radial positioning, to provide stable measurement support for the logarithmic tapered rollers in wind turbine bearings. Three dial indicators arranged axially measure the major, pitch, and minor diameters of the logarithmic tapered rollers in the wind turbine bearings. The deviations of the major and minor diameters from standard values ​​represent the machining errors of the major and minor diameters. The difference between the pitch diameter and the major and minor diameters, and the deviation from the standard value, represents the convexity value. The difference between the major and minor diameters is equivalent to the angle value, and its deviation from the standard angle value represents the machining error. Using this measuring instrument, the diameter, convexity, and angle measurements of the logarithmic tapered rollers in wind turbine bearings can be completed in one operation, thus significantly improving measurement efficiency and solving the bottleneck problem of existing measuring fixtures and methods being unable to keep up with production pace.

Description

Technical Field

[0001] This invention relates to the field of measuring fixtures for the machining of large, high-power wind turbine bearing rollers, specifically to a measuring instrument for the diameter convexity angle of large logarithmic tapered rollers for wind turbine bearings. Background Technology

[0002] With the rapid growth in domestic and international demand for clean energy, China's wind power industry has experienced rapid growth. Wind turbine bearings, due to maintenance cost constraints, must have a lifespan of 20 years or more. Furthermore, operating conditions and environmental factors place extremely stringent requirements on the design and manufacturing of bearing rings and rollers. Logarithmic rollers can effectively reduce or eliminate stress concentration and extend the service life of roller bearings, and are therefore widely used in wind turbine bearings.

[0003] During the grinding and ultra-precision machining of large logarithmic tapered rollers for wind turbine bearings, the diameter, crown, and angle of each roller need to be measured to monitor the process stability and finished product quality. Currently, the diameter, crown, and angle measurements of these rollers are performed three times using three separate measuring fixtures. This results in low measurement efficiency, unstable results, and large errors, leading to rework and production delays. Previously, when large logarithmic tapered rollers for wind turbine bearings were produced using plunge grinding and plunge ultra-precision machining processes, the relatively low machining efficiency was manageable. However, with the adoption of innovative through-feed grinding and through-feed ultra-precision processes for wind turbine bearings, production efficiency has increased by 4-5 times compared to the previous methods. Therefore, the efficiency of existing measuring fixtures and methods cannot keep up with the production pace, and the measurement errors and stability cannot meet the control requirements of the production process, becoming a bottleneck problem in the production of logarithmic tapered rollers for wind turbine bearings. To address this, a measuring instrument was developed that integrates the measurement of diameter, crown, and angle of large logarithmic tapered rollers for wind turbine bearings. This instrument uses the bottom surface of the large diameter end and the outer surfaces of the large and small diameter ends of the logarithmic tapered roller as calibration and measurement benchmarks before measurement. By rotating the roller, the deviation of the diameters at the large, medium, and small diameters relative to a standard part is measured, thus obtaining the machining errors of the diameter, crown, and angle of the large logarithmic tapered roller for wind turbine bearings during grinding and ultra-precision machining. However, this measuring instrument has the following problems during use: 1. Because the bottom surface of the large diameter end of the logarithmic tapered roller is in surface contact with the supporting plane, and the contact surface has high machining precision, a strong bonding force exists between the contact surfaces in the presence of grinding fluid, ultra-precision oil, etc., leading to friction... Increased friction makes it difficult to rotate the large logarithmic tapered roller by hand during measurement, requiring a large effort to rotate it, resulting in low measurement efficiency and failing to achieve the initially expected results. 2. In actual measurement, due to machining errors in the logarithmic tapered roller, the outer surfaces of the major and minor diameter ends cannot simultaneously contact the measurement reference support. Furthermore, the large effort required to rotate the roller during measurement easily leads to roller tilting (a gap between the bottom surface of the major diameter end and the support surface), causing fluctuations in the measurement data and resulting in significant deviations in the measurement results. Consequently, the measurement results suffer from low accuracy, poor stability, and low measurement efficiency. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention discloses a measuring instrument for the diameter, convexity, and angle of large logarithmic tapered rollers for wind turbine bearings. It employs a combination of axial calibration positioning on a reference platform and axial measurement positioning on a reference bar, along with four-point radial positioning, to form a stable measurement support for the large logarithmic tapered rollers in wind turbine bearings. Three dial indicators arranged axially measure the major, pitch, and minor diameters of the large logarithmic tapered rollers in wind turbine bearings. The deviations of the major and minor diameters from the standard values ​​represent the machining errors of the major and minor diameters. The difference between the pitch diameter and the major and minor diameters, and the deviation from the standard values, represents the convexity value. The difference between the major and minor diameters is equivalent to an angle value, and its deviation from the standard angle value represents the machining error. This measuring instrument can complete the measurement of the diameter, convexity, and angle of large logarithmic tapered rollers in wind turbine bearings in a single positioning operation, thus significantly improving the accuracy, stability, and efficiency of the measurement results.

[0005] To achieve the aforementioned objective, the present invention employs the following technical solution: a large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings, comprising a base plate assembly, a support column assembly A, a support column assembly B, and a measuring column assembly. A reference platform is provided in the middle of the upper part of the base plate assembly, and a reference rod is detachably and offsetly mounted on the reference platform. The support column assemblies A, B, and C are vertically arranged around the reference platform on the upper part of the base plate assembly. Each support column assembly A and B contains two pins, and the measuring column assembly contains three dial indicators. Before measuring the diameter convexity angle of a large logarithmic tapered roller bearing, the reference bar on the reference platform is removed. The diameter convexity angle measuring instrument for the large logarithmic tapered roller bearing is calibrated using a tapered roller standard component. That is, the calibration support positioning reference of the bottom surface of the large diameter end of the logarithmic tapered roller is the reference platform. When measuring the diameter convexity angle of the large logarithmic tapered roller bearing, the reference bar is installed on the reference platform. That is, the reference bar is the measurement support positioning reference of the bottom surface of the large diameter end when measuring the large logarithmic tapered roller bearing. The four pins set in support column assembly A and support column assembly B constitute the radial support positioning reference. During actual measurement, the large logarithmic tapered roller being measured will tilt slightly under the support of an offset reference bar, ensuring that its outer surface remains in contact with the four center pins on support column assemblies A and B. The roller is then slowly rotated counterclockwise. Three dial indicators in the measuring column assemblies simultaneously measure the large, pitch, and small diameters of the logarithmic tapered roller in the wind turbine bearing. The deviations of the large and small diameters from the standard values ​​represent the machining errors of the large and small diameters. The deviations of the pitch diameter from the dial indicator values ​​and standard values ​​at both ends represent the convexity deviation. The difference is equivalent to the angle value, and its deviation from the standard angle value is the machining error. Although the calibration reference of this measuring instrument is inconsistent with the measurement reference, which violates the design principle of measuring instruments, error analysis shows that its impact on the actual measurement result error is minimal, thus achieving extremely high measurement accuracy. In addition, the reference bar and the large diameter end face of the large logarithmic tapered roller are in line contact, which greatly reduces the bonding force between the contact surfaces. During the measurement process, it is very easy to rotate the large logarithmic tapered roller by hand, and the diameter, crown, and angle of the logarithmic tapered roller of the wind turbine bearing can be quickly measured in one measurement, thus greatly improving the measurement efficiency.

[0006] Furthermore, the base plate assembly includes a base plate, a base, a measuring transition plate, and a reference platform. The base is fixedly installed on the upper part of the base plate, the measuring transition plate is fixedly installed on one side of the upper part of the base, and the reference platform is fixedly installed in the middle of the base. Since the large logarithmic tapered rollers of wind turbine bearings are relatively heavy, usually 10-15kg, directly placing the logarithmic tapered rollers on the reference platform can easily damage the dial indicator and the lower reference platform. After adding the measuring transition plate, the large end of the logarithmic tapered roller is first placed on the measuring transition plate, and then it is pushed flat onto the reference platform by hand, thereby preventing damage to the dial indicator and the reference platform when placing the logarithmic tapered rollers.

[0007] Furthermore, the base is provided with three dovetail slides, two of which are arranged in parallel, and the third dovetail slide is arranged perpendicular to the two parallel dovetail slides; a through groove is provided in the middle of the dovetail slides, and a column moving block is provided in the middle of the through groove. The column moving block is movably connected to the base through a screw. When the screw is rotated, the column moving block moves in the through groove in the middle of the dovetail slide.

[0008] Furthermore, support column assembly A and support column assembly B have the same structure. Support column assembly A includes a support column, a support dovetail slider, and a ejector pin. The bottom of the support column is provided with a support column dovetail groove. The support column is movably mounted on the upper end face of the base through the cooperation of the support column dovetail groove and the dovetail slide. The bottom of the support column dovetail groove is fixedly connected to the column moving block. When the column moving block moves in the through groove in the middle of the dovetail slide, it drives the support column to move along the dovetail slide, adjusting the position of the support column relative to the reference platform in the horizontal plane. The front end face of the support column is provided with a vertical support column dovetail guide rail. The support dovetail slider is provided with a dovetail groove. The support dovetail slider is slidably connected to the support column through the cooperation of the support column dovetail guide rail and the dovetail groove. The support dovetail slider is locked in its position on the support column by a locking bolt. The front end face of the support dovetail slider is provided with a through hole. The ejector pin is movably mounted in the through hole. The ejector pin is locked in its position in the through hole by a locking bolt.

[0009] Furthermore, the measuring column assembly includes a measuring column, measuring dovetail slider A, measuring dovetail slider B, measuring dovetail slider C, and a dial indicator. The bottom of the measuring column has a dovetail groove, and the measuring column is movably mounted on the upper surface of the base through the cooperation of the dovetail groove and the dovetail slide. The bottom of the dovetail groove is fixedly connected to the column moving block. When the column moving block moves in the through groove in the middle of the dovetail slide, it drives the measuring column to move along the dovetail slide, adjusting the position of the measuring column relative to the reference platform in the horizontal plane. The front end of the measuring column has a vertical measuring column dovetail guide rail. The tail slider A has a dovetail groove. The measuring dovetail slider A is slidably connected to the measuring column through the dovetail guide rail of the measuring column via the dovetail groove. The measuring dovetail slider A is locked in position on the measuring column by locking bolts. The connection structure between the measuring dovetail sliders B and C and the measuring column is the same as that of the measuring dovetail slider A. Each of the measuring dovetail sliders A, B, and C has a dial indicator mounting hole. The dial indicator is connected to the measuring dovetail sliders A, B, and C through the dial indicator mounting hole. After installation, the dial indicator can be locked by locking bolts.

[0010] Furthermore, the upper end of the measuring dovetail slider C is rotatably equipped with an adjusting handwheel B, the lower end of the adjusting handwheel B is provided with a screw, and the upper end face of the measuring dovetail slider B is provided with a threaded hole. The screw of the adjusting handwheel B is engaged with the threaded hole of the measuring dovetail slider B. The adjusting handwheel B is used to adjust the height of the measuring dovetail slider B in the vertical direction.

[0011] Furthermore, an adjusting handwheel C is rotatably mounted on the upper end of the measuring column, and a screw is provided at the lower end of the adjusting handwheel C. A lead screw nut is fixedly mounted on the rear end face of the measuring dovetail slider C, and the screw of the adjusting handwheel C is engaged with the lead screw nut; the adjusting handwheel C is used to adjust the height of the measuring dovetail slider C in the vertical direction.

[0012] Furthermore, an adjustment handwheel A is rotatably mounted on the lower right side of the measuring column. A guide rod is provided on the left end of the adjustment handwheel A, and a gear is fixedly mounted on the guide rod. A rack is fixedly mounted on the rear end face of the measuring dovetail slider A, and the gear and rack are meshed together. The adjustment handwheel A is used to adjust the height of the measuring dovetail slider A in the vertical direction.

[0013] Furthermore, the outer surface of the reference bar is 0.08-0.1 mm higher than the plane of the reference platform. This small height difference ensures the smooth movement of the logarithmic large tapered roller from the measuring transition plate to the reference platform. The axis of the reference bar forms a 45° angle with the plane containing the pin axis of support column assembly A. The axis of the reference bar is offset by 30.0-40.0 mm relative to the axis of the reference platform, away from support column assembly A and support column assembly B. The reference bar on the reference platform is used to solve the problem of over-positioning in the axial positioning and four-point radial positioning methods of the reference platform during the measurement of logarithmic tapered rollers. This leads to instability in the measurement process. For example, when the small-end diameter of the logarithmic tapered roller being measured is smaller than the standard value, because the large-end face of the logarithmic tapered roller is placed flat on the reference platform, the outer surface of the large end of the logarithmic tapered roller contacts the lower ejector pins of support column assembly A and support column assembly B, but the outer surface of the small end does not contact the upper ejector pins of support column assembly A and support column assembly B. In this case, when rotating the logarithmic tapered roller, the large logarithmic tapered roller may tilt due to the loss of support at the upper end, causing the dial indicator reading to jump, thus affecting the interpretation of the dial indicator reading. Measurement errors arise when a reference bar, offset by 30.0-40.0 mm relative to the reference platform axis, is added. The large end face of the logarithmic tapered roller being measured rests on the reference bar. Because the axis of the reference bar is offset relative to its own axis, the center of gravity of the logarithmic tapered roller being measured deviates from the reference bar, naturally causing it to tilt. This results in the small end outer surface naturally maintaining contact with the ejector pins on the upper parts of support column assembly A and support column assembly B. This ensures that even when the small end diameter of the logarithmic tapered roller being measured is smaller than the standard value, both the large and small end outer surfaces of the logarithmic tapered roller are in contact with the support. The four pins on support column assembly A and support column assembly B reliably abut against each other to prevent the dial indicator reading from jumping due to tilting during the measurement rotation of the logarithmic tapered roller. Using the above example, it should be further explained that when the small end diameter of the logarithmic tapered roller is smaller than the standard value, its axis is not perpendicular to the reference platform during measurement. Therefore, the measured major, pitch, and minor end diameters of the logarithmic tapered roller will have a certain measurement deviation from the ideal values. However, since the measurement error of the logarithmic tapered roller is within micrometers (10⁻¹⁰), this deviation is not significant. -5 At the [level], even if the axis is not perpendicular to the reference platform during the measurement process, the resulting measurement deviation is extremely small and can be ignored (see the instruction manual for details). Figure 11(Analysis of measurement errors in schemes A and B); In addition, after adding the reference bar, the large end face of the logarithmic tapered roller being measured is in line contact with the reference bar. Therefore, the frictional resistance of the logarithmic tapered roller during rotation is significantly smaller than that of the logarithmic tapered roller in contact with the reference platform. As a result, its rotation process is easier to control, which in turn improves the measurement accuracy.

[0014] Furthermore, the large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings is equipped with a tapered roller standard part. The rotational profile of the tapered roller standard part is a straight line. The tapered roller standard part is used to calibrate three dial indicators, corresponding to the major diameter, pitch diameter, and minor diameter of the logarithmic tapered rollers in the measuring column assembly, respectively. After calibration, when the dial indicators measure the major diameter, pitch diameter, and minor diameter of the logarithmic tapered rollers in the wind turbine bearings, the deviation between the major diameter and minor diameter and the calibrated value is the machining error (because the generatrix of the large logarithmic tapered rollers in the wind turbine bearings is a straight line, and...). The convexity values ​​at the major and minor diameter ends are extremely small and can be ignored. The difference between the mean diameter and the major and minor diameters, as well as the deviation of the calibration value, constitutes the convexity of the logarithmic tapered roller of the wind turbine bearing. The difference between the major and minor diameters is equivalent to the angle value (strictly speaking, the difference between the major and minor diameters is not equal to the angle value of the logarithmic tapered roller of the wind turbine bearing. Since the wind turbine bearing logarithmic tapered roller diameter convexity angle measuring instrument of this invention actually measures the deviation value between the measured logarithmic tapered roller and the standard part, the difference between the major and minor diameters is used to replace the angle value for convenient measurement and recording).

[0015] Due to the adoption of the technical solution described above, the present invention has the following beneficial effects: The wind turbine bearing logarithmic tapered roller diameter, convexity, and angle measuring instrument disclosed in this invention adopts a reference platform axial calibration positioning and a reference bar axial measurement positioning method, combined with a four-point radial positioning combination, to form a stable measurement support for the measurement of the wind turbine bearing logarithmic tapered roller. Three dial indicators arranged axially are used to measure the major diameter, pitch diameter, and minor diameter of the wind turbine bearing logarithmic tapered roller. The deviation of the major diameter and minor diameter from the standard value is the machining error of the major diameter and minor diameter. The difference between the pitch diameter and the major diameter / minor diameter and the standard value is the convexity value. The difference between the major diameter and minor diameter is equivalent to the angle value, and its deviation from the standard angle value is the machining error. Using this measuring instrument, the diameter, convexity, and angle of the wind turbine bearing logarithmic tapered roller can be measured in one operation, thus significantly improving measurement efficiency, accuracy, and stability, thereby solving the bottleneck problem that existing measuring fixtures and methods cannot keep up with production pace. Attached Figure Description

[0016] Figure 1 A schematic diagram of the appearance of a logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings; Figure 2 This is a schematic diagram of the base plate assembly. Figure 3This is a schematic diagram of the base's appearance; Figure 4 A schematic diagram of the exterior of the supporting column assembly A; Figure 5 For the measurement of the appearance of the column assembly Figure 1 ; Figure 6 For the measurement of the appearance of the column assembly Figure 2 ; Figure 7 Top view of a logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings; Figure 8 A schematic diagram showing the appearance of a logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings. Figure 9 Main view of the measuring principle of the logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings; Figure 10 Top view of the measurement principle of the logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings; Figure 11 To add measurement error analysis to the reference bar scheme.

[0017] In the diagram: 1. Base plate assembly; 1.1 Base plate; 1.2 Base; 1.2.1 Dovetail slide; 1.2.2 Reference platform; 1.3 Measurement transition plate; 1.4 Reference platform; 1.5 Reference rod; 1.6 Column moving block; 1.7 Adjustable support foot; 2. Support column assembly A; 2.1 Support column; 2.1.1 Support column dovetail groove; 2.1.2 Support column dovetail guide rail; 2.2 Support dovetail slider; 2.3 Ejector pin; 3. Support column assembly B; 4. Measuring column assembly; 4.1 Measuring column; 4.1.1 Measuring column dovetail groove; 4.1.2 Measuring column dovetail guide rail; 4.2 Measuring dovetail slider A; 4.3 Measuring dovetail slider B; 4.4 Measuring dovetail slider C; 4.5 Dial indicator; 4.6 Adjusting handwheel B; 4.7 Adjusting handwheel C; 4.8 Adjusting handwheel A; 4.9 Lead screw nut; 4.10 Rack; 5. Standard tapered roller parts. Detailed Implementation

[0018] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0019] A large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings, see the instruction manual appendix. Figure 1 Includes base plate assembly 1, support column assembly A2, support column assembly B3, and measuring column assembly 4; See the instruction manual appendix Figure 2The base plate assembly 1 includes a base plate 1.1, a base 1.2, a measuring transition plate 1.3, and a reference platform 1.4. The base 1.2 is fixedly mounted on the upper part of the base plate 1.1, the measuring transition plate 1.3 is fixedly mounted on one side of the upper part of the base 1.2, and the reference platform 1.4 is fixedly mounted in the middle of the base 1.2. (See the attached instruction manual.) Figure 3 The base 1.2 has three dovetail slides 1.2.1, two of which are arranged parallel to each other, and the third dovetail slide 1.2.1 is arranged perpendicular to the two parallel dovetail slides 1.2.1. Each dovetail slide 1.2.1 has a through groove in the middle, and a column moving block 1.6 is located in the middle of the through groove. The column moving block 1.6 is threadedly connected to a lead screw, which is rotatably connected to the base 1.2. An adjusting handwheel is located at the outer end of the lead screw. When the adjusting handwheel is rotated, the lead screw rotates, driving the column moving block 1.6 to move within the through groove in the middle of the dovetail slide 1.2.1. (See the attached instruction manual.) Figure 7 , 9 10: A reference rod 1.5 is detachably mounted on the reference platform 1.4. The outer circular surface of the reference rod 1.5 is 0.1mm higher than the plane of the reference platform 1.4. The axis of the reference rod 1.5 forms a 45° angle with the plane containing the axis of the pin 2.3 of the support column assembly A2. The axis of the reference rod 1.5 is offset by 30.0mm relative to the axis of the reference platform 1.4 in a direction away from the support column assembly A2 and the support column assembly B3. Support column assembly A2 and support column assembly B3 have the same structure; see the instruction manual appendix. Figure 4The support column assembly A2 includes a support column 2.1, a support dovetail slider 2.2, and a ejector pin 2.3. The support column 2.1 has a support column dovetail groove 2.1.1 at its bottom. The support column 2.1 is movably mounted on the upper surface of the base 1.2 through the cooperation of the support column dovetail groove 2.1.1 and the dovetail slide 1.2.1. The bottom of the support column dovetail groove 2.1.1 is fixedly connected to the column moving block 1.6. When the column moving block 1.6 moves in the through groove in the middle of the dovetail slide 1.2.1, it drives the support column 2.1 to move along the dovetail slide 1.2.1. A locking bolt is provided on the support column 2.1. After the position of the support column 2.1 on the base plate assembly 1 is adjusted, its position is locked by the locking bolt. The front end face of the support column 2.1 is provided with a vertical support column dovetail guide rail 2.1.2. The support dovetail slider 2.2 is provided with a dovetail groove. The support dovetail slider 2.2 is slidably connected to the support column 2.1 through the dovetail groove and the support column dovetail guide rail 2.1.2. The support dovetail slider 2.2 is provided with a locking bolt. After the position of the support dovetail slider 2.2 on the support column 2.1 is adjusted, its fixed position on the support column 2.1 is locked by the locking bolt. The front end face of the support dovetail slider 2.2 is provided with a through hole. The ejector pin 2.3 is movably disposed in the through hole. The support dovetail slider 2.2 is also provided with an ejector pin locking bolt. After the position of the ejector pin is adjusted, its fixed position in the through hole is locked by the ejector pin locking bolt. Refer to instructions 5 and 6: The measuring column assembly 4 includes a measuring column 4.1, a measuring dovetail slider A 4.2, a measuring dovetail slider B 4.3, a measuring dovetail slider C 4.4, and a dial indicator 4.5. The measuring column 4.1 has a measuring column dovetail groove 4.1.1 at its bottom. The measuring column 4.1 is movably mounted on the upper surface of the base 1.2 through the cooperation of the measuring column dovetail groove 4.1.1 and the dovetail slide 1.2.1. The bottom of the measuring column dovetail groove 4.1.1 is fixedly connected to the column moving block 1.6. When the column moving block 1.6 moves in the through groove in the middle of the dovetail slide 1.2.1, it drives the measuring column 4.1 to move along the dovetail slide 1.2.1. The front end of the measuring column 4.1 has a vertical measuring column dovetail guide rail 4.1.2. The measuring dovetail slider A 4.2 has a dovetail groove. Dovetail slider A4.2 is slidably connected to measuring column 4.1 via a dovetail groove and dovetail guide rail 4.1.2. Dovetail slider A4.2 is locked in position on measuring column 4.1 by locking bolts. The connection structure between dovetail sliders B4.3 and C4.4 and measuring column 4.1 is the same as that of dovetail slider A4.2. Dovetail sliders A4.2, B4.3, and C4.4 are all equipped with dial indicator mounting holes. Dial indicator 4.5 is connected to dovetail sliders A4.2, B4.3, and C4.4 via these holes. Locking bolts are provided on dovetail sliders A4.2, B4.3, and C4.4 to lock the dial indicator position. The upper end of the measuring dovetail slider C4.4 is rotatably equipped with an adjusting handwheel B4.6, the lower end of the adjusting handwheel B4.6 is equipped with a screw, the upper end face of the measuring dovetail slider B4.3 is equipped with a threaded hole, and the screw of the adjusting handwheel B4.6 is engaged with the threaded hole of the measuring dovetail slider B4.3. The upper end of the measuring column 4.1 is rotatably equipped with an adjusting handwheel C4.7, and the lower end of the adjusting handwheel C4.7 is equipped with a screw. The rear end face of the measuring dovetail slider C4.4 is fixedly equipped with a lead screw nut 4.9, and the screw of the adjusting handwheel C4.7 is engaged with the lead screw nut 4.9. An adjusting handwheel A4.8 is rotatably mounted on the lower right side of the measuring column 4.1. A guide rod is provided on the left end of the adjusting handwheel A4.8, and a gear is fixedly mounted on the guide rod. A rack 4.10 is fixedly mounted on the rear end face of the measuring dovetail slider A4.2, and the gear is meshed with the rack 4.10. The large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings is equipped with tapered roller standard part 5, and the rotational profile of tapered roller standard part 5 is a straight line.

[0020] Before using the large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings, the adjustment process is as follows: See the instruction manual appendix. Figure 7 , 8First, remove the reference bar; place the tapered roller standard part 5 on the reference platform 1.4, visually placing the standard part 5 in the middle of the reference platform 1.4; Rotate the adjusting handwheel of support column assembly A2 to move support column assembly A2 left and right. Adjust support column assembly A2 to a suitable position according to the diameter of tapered roller standard part 5, and then lock it. Adjust the two support dovetail sliders 2.2 on support column assembly A2 so that the axis of the lower ejector pin 2.3 is about 5mm away from the lower end of tapered roller standard part 5 (visually estimated or measured with a ruler), and the upper ejector pin 2.3 is about 5mm away from the lower end of tapered roller standard part 5 (visually estimated or measured with a ruler). Then lock the two support dovetail sliders 2.2. Move the two ejector pins 2.3 of support column assembly A2 until they abut against the outer surface of tapered roller standard part 5, and then lock them. Adjust support column assembly B3 in the same way. Rotate the adjusting handwheel of the measuring column assembly 4, visually or with the aid of a ruler, to ensure that the axis of the dial indicator measuring head on the column assembly 4 is in the same plane as the axis of the pin 2.3 on the supporting column assembly A2, and then lock the position of the measuring column assembly 4 on the base plate assembly 1; rotate the adjusting handwheel A4.8 to adjust the height of the lowermost measuring dovetail slider A4.2 so that the axis of the dial indicator measuring head is about 5mm away from the lower end of the tapered roller standard part 5 (visually or with the aid of a ruler), and then lock it; rotate the adjusting handwheel C4.7 to adjust the height of the uppermost measuring dovetail slider A4.2 so that the axis of the dial indicator measuring head is about 5mm away from the upper end of the tapered roller standard part 5 (visually or with the aid of a ruler), and then lock it; when adjusting the height of the uppermost measuring dovetail slider A4.2, the middle measuring dovetail slider A4.2 moves synchronously with the uppermost measuring dovetail slider A4.2 until the uppermost... After locking the position of the side measuring dovetail slider A4.2, rotate the adjusting handwheel B4.6 to adjust the height of the middle measuring dovetail slider A4.2 so that it is in the middle position of the height of the tapered roller standard part 5 (visually or with the aid of a ruler), and then lock it; adjust the dial indicator 4.5 from bottom to top so that the dial indicator measuring head is in contact with the outer surface of the tapered roller standard part 5 and the compression of the dial indicator measuring head is in the optimal state (observe the pointer), and then lock the dial indicator; then loosen the locking bolt of the rotating measuring column assembly 4, and rotate the adjusting handwheel of the measuring column assembly 4 clockwise and counterclockwise to fine-tune the front and back position of the measuring column assembly 4, and observe the change of the pointer of the dial indicator. When the pointer change reaches the maximum value, lock the position of the measuring column assembly 4. At this time, the contact position between the dial indicator measuring head and the tapered roller standard part 5 is at the maximum diameter. Rotate the dial indicator dial to make its pointer display zero; Remove the standard tapered roller part 5, install the reference bar 1.5, and the adjustment of the large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings is completed; When measuring the diameter convexity angle of a logarithmic tapered roller bearing, first place the large end of the logarithmic tapered roller to be measured on the measuring transition plate 1.3. Then, manually push the logarithmic tapered roller slowly to the reference platform 1.4, ensuring that the outer circumferential surface of the logarithmic tapered roller is in reliable contact with all four pins 2.3 on the support column assembly A2 and support column assembly B3. Then, hold the outer circumferential surface of the logarithmic tapered roller and push it slightly against the support column assembly A2 and support column assembly B3. Rotate the roller counterclockwise along the B3 angle direction. Observe the runout of the three dial indicator pointers as the logarithmic tapered roller rotates, and record the measured values ​​of the major diameter, pitch diameter, and minor diameter of the logarithmic tapered roller. The deviation of the major diameter and minor diameter from the standard value is the machining error of the major diameter and minor diameter. The difference between the pitch diameter and the major diameter / minor diameter and the deviation from the standard value is the convexity value. The difference between the major diameter and minor diameter is equivalent to the angle value, and its deviation from the standard angle value is the machining error.

[0021] The base plate assembly 1 is equipped with four adjustable support feet 1.7 at its lower part. During use, the large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings is tilted at a 3-5° angle towards the support column assembly A2 and support column assembly B3 by the adjustable support feet 1.7, so that the large logarithmic tapered rollers can reliably contact the four ejector pins 2.3. When rotating the logarithmic tapered rollers, it is no longer necessary to push the logarithmic tapered rollers towards the angle between the support column assembly A2 and support column assembly B3 by hand.

[0022] The invention provides a large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings with a measurement accuracy error of less than 0.5 micrometers.

[0023] The parts of this invention not described in detail are prior art.

Claims

1. A wind power bearing large-scale logarithmic conical roller diameter convexity angle measuring instrument, characterized in that: The assembly includes a base plate assembly (1), a support column assembly A (2), a support column assembly B (3), and a measuring column assembly (4). A reference platform (1.4) is set in the middle of the upper part of the base plate assembly (1). A reference rod (1.5) is set on the reference platform (1.4) in an offset and disassembly manner. The support column assembly A (2), support column assembly B (3), and measuring column assembly (4) are set vertically around the reference platform (1.4) on the upper part of the base plate assembly (1). Two pins (2.3) are set in both support column assembly A (2) and support column assembly B (3). Three dial indicators (4.5) are set in the measuring column assembly (4). Before measuring the diameter convexity angle of a large logarithmic tapered roller bearing, the reference bar (1.5) on the reference platform (1.4) is removed. The diameter convexity angle measuring instrument for the large logarithmic tapered roller bearing is calibrated using the tapered roller standard part (5). The calibration support positioning reference for the bottom surface of the large diameter end of the logarithmic tapered roller is the reference platform (1.4). When measuring the diameter convexity angle of the large logarithmic tapered roller bearing, the reference bar (1.5) is installed on the reference platform (1.4). The large diameter end bottom surface of the large logarithmic tapered roller bearing is used as the measurement support positioning reference. The four pins (2.3) set in the support column assembly A (2) and support column assembly B (3) constitute the radial support positioning reference. The three dial indicators (4.5) in the measurement column assembly (4) and the four pins form a single section to measure the large diameter, medium diameter and small diameter end diameter of the large logarithmic tapered roller bearing. The deviation of the large diameter and small diameter from the standard value is the machining error of the large diameter and small diameter. The deviation of the mean diameter from the standard value is the convexity value; the fixed point difference between the major and minor diameters is equivalent to the angle value, and the deviation of the major and minor diameters from the standard angle value is the machining error.

2. The wind turbine bearing large logarithmic tapered roller diameter convexity angle measuring instrument according to claim 1, characterized in that: The base plate assembly (1) includes a base plate (1.1), a base (1.2), a measuring transition plate (1.3), and a reference platform (1.4); the base (1.2) is fixedly installed on the upper part of the base plate (1.1), the measuring transition plate (1.3) is fixedly installed on one side of the upper part of the base (1.2), and the reference platform (1.4) is fixedly installed in the middle of the base (1.2).

3. The wind turbine bearing large logarithmic tapered roller diameter convexity angle measuring instrument according to claim 2, characterized in that: The base (1.2) is provided with three dovetail slides (1.2.1), two of which are arranged in parallel, and the other dovetail slide (1.2.1) is arranged perpendicular to the two parallel dovetail slides (1.2.1). A through groove is provided in the middle of the dovetail slide (1.2.1), and a column moving block (1.6) is provided in the middle of the through groove. The column moving block (1.6) is movably connected to the base (1.2) through a screw. When the screw is rotated, the column moving block (1.6) moves in the through groove in the middle of the dovetail slide (1.2.1).

4. The wind turbine bearing large logarithmic tapered roller diameter convexity angle measuring instrument according to claim 3, characterized in that: Support column assembly A (2) and support column assembly B (3) have the same structure; support column assembly A (2) includes support column (2.1), support dovetail slider (2.2), and ejector pin (2.3); the bottom of support column (2.1) is provided with support column dovetail groove ( 2.1.1), the support column (2.1) is connected via the dovetail groove of the support column ( 2.1.1) Cooperates with the dovetail slide (1.2.1), and is movably set on the upper end face of the base (1.2). The bottom of the dovetail groove (2.1.1) of the support column is fixedly connected to the column moving block (1.6). When the column moving block (1.6) moves in the through groove in the middle of the dovetail slide (1.2.1), it drives the support column (2.1) to move along the dovetail slide (1.2.1). The front end face of the support column (2.1) is provided with a vertical support column dovetail guide rail ( 2.1.2) The dovetail slider (2.2) is provided with a dovetail groove. The dovetail slider (2.2) is slidably connected to the support column (2.1) through the dovetail groove and the dovetail guide rail (2.1.2) of the support column. The dovetail slider (2.2) is locked in position on the support column (2.1) by locking bolts. The front end face of the dovetail slider (2.2) is provided with a through hole. The ejector pin (2.3) is movably set in the through hole. The ejector pin (2.3) is locked in position in the through hole by locking bolts.

5. The large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings according to claim 1, characterized in that: The measuring column assembly (4) includes a measuring column (4.1), a measuring dovetail slider A (4.2), a measuring dovetail slider B (4.3), a measuring dovetail slider C (4.4), and a dial indicator (4.5); the bottom of the measuring column (4.1) is provided with a measuring column dovetail groove ( 4.1.1), Measuring the column (4.1) by measuring the dovetail groove of the column ( 4.1.1) Cooperates with the dovetail slide (1.2.1), and is movably set on the upper end face of the base (1.2). The bottom of the measuring column dovetail groove (4.1.1) is fixedly connected to the column moving block (1.6). When the column moving block (1.6) moves in the through groove in the middle of the dovetail slide (1.2.1), it drives the measuring column (4.1) to move along the dovetail slide (1.2.1). The front end face of the measuring column (4.1) is provided with a vertical measuring column dovetail guide rail ( 4.1.2) The measuring dovetail slider A (4.2) is provided with a dovetail groove. The measuring dovetail slider A (4.2) is slidably connected to the measuring column (4.1) through the dovetail groove and the measuring column dovetail guide rail (4.1.2). The measuring dovetail slider A (4.2) is locked in position on the measuring column (4.1) by locking bolts. The connection structure between the measuring dovetail slider B (4.3), measuring dovetail slider C (4.4) and the measuring column (4.1) is the same as that of the measuring dovetail slider A (4.2). The measuring dovetail slider A (4.2), measuring dovetail slider B (4.3), and measuring dovetail slider C (4.4) are all provided with dial indicator mounting holes. The dial indicator (4.5) is connected to the measuring dovetail slider A (4.2), measuring dovetail slider B (4.3), and measuring dovetail slider C (4.4) through the dial indicator mounting holes.

6. The wind turbine bearing large logarithmic tapered roller diameter convexity angle measuring instrument according to claim 5, characterized in that: The upper end of the measuring dovetail slider C (4.4) is equipped with an adjusting handwheel B (4.6), the lower end of the adjusting handwheel B (4.6) is provided with a screw, and the upper end face of the measuring dovetail slider B (4.3) is provided with a threaded hole. The screw of the adjusting handwheel B (4.6) is engaged with the threaded hole of the measuring dovetail slider B (4.3).

7. The large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings according to claim 5, characterized in that: The upper end of the measuring column (4.1) is equipped with an adjusting handwheel C (4.7), and the lower end of the adjusting handwheel C (4.7) is equipped with a screw. The rear end face of the measuring dovetail slider C (4.4) is fixedly equipped with a lead screw nut (4.9). The screw of the adjusting handwheel C (4.7) is engaged with the lead screw nut (4.9).

8. The large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings according to claim 5, characterized in that: The measuring column (4.1) has an adjustment handwheel A (4.8) rotatably mounted on the lower side. The left end of the adjustment handwheel A (4.8) is equipped with a light rod, and a gear is fixedly mounted on the light rod. The rear end face of the measuring dovetail slider A (4.2) is fixedly equipped with a rack (4.10), and the gear is meshed with the rack (4.10).

9. The large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings according to claim 1, characterized in that: The outer circular surface of the reference rod (1.5) is 0.08-0.1mm higher than the plane of the reference platform (1.4); the axis of the reference rod (1.5) forms a 45° angle with the plane containing the axis of the pin (2.3) of the support column assembly A (2); the axis of the reference rod (1.5) is offset by 30.0-40.0mm away from the axis of the reference platform (1.4) and away from the support column assembly A (2) and support column assembly B (3), so that the axis of the large logarithmic tapered roller of the wind turbine bearing tends to lean towards the four pins, forming a reliable positioning.

10. The wind turbine bearing large logarithmic tapered roller diameter convexity angle measuring instrument according to claim 1, characterized in that: The large logarithmic tapered roller diameter convexity angle measuring instrument for wind turbine bearings is equipped with a tapered roller standard part (5). The rotational profile of the tapered roller standard part (5) is a straight line. When measuring convexity, its convexity is twice the value measured by the shape measuring instrument.

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