Vertical calibration system for cylindrical surface runout measuring meter of rotating shaft

Abstract

The utility model relates to a vertical calibration system for a cylindrical surface runout measuring meter of a rotating shaft, and the system comprises a first calibration part and a second calibration part, and the first calibration part is used for providing a first laser surface which passes through a to-be-measured point of the cylindrical surface of the rotating shaft and the circle center of two end surfaces of the rotating shaft at the same time. The second calibration part is used for providing a second laser surface which passes through the to-be-measured point of the cylindrical surface of the rotating shaft and is perpendicular to the center line of the rotating shaft. When measurement is needed, firstly, a first laser surface is provided through the first calibration part, and the measuring meter is adjusted to enable the measuring rod to coincide with the first laser surface; and then a second laser surface is provided through a second calibration part, and the measuring meter is adjusted to enable the measuring rod to coincide with the second laser surface. The first laser surface can ensure that the extension line of the measuring rod passes through the center line of the rotating shaft, and the second laser surface can ensure that the measuring rod is perpendicular to the center line, so that the verticality of the measuring rod and the point to be measured can be ensured through the cooperation of the first laser surface and the second laser surface, and the measurement accuracy of the measuring meter is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cylindrical surface runout measurement, and in particular to a vertical calibration system of a cylindrical surface runout measurement table of a rotating shaft. Background Art

[0002] Large rotating equipment has high requirements for the flatness of the cylindrical surface of the rotating shaft. For example, the turbine rotor journal and the turbine generator collector ring all have high requirements for the flatness of the cylindrical surface. In order to ensure the safe operation of the equipment, it is necessary to use a measuring table to measure the cylindrical surface runout value of the rotating shaft. The measuring table usually includes a measuring rod. The conventional measurement method is to directly or indirectly press the head of the measuring rod against the cylindrical surface to be measured, rotate the measured rotating shaft for more than one circle, record the maximum and minimum values ​​of the runout, and take the difference for judgment. The accuracy of this measurement method is related to the verticality of the measuring rod and the position to be measured. In the related technology, the angle of the measuring rod is corrected by visual observation during measurement, which requires high operating experience and operating level of the operator. Due to individual differences, there may be large deviations in verticality, which in turn leads to large measurement errors. Utility Model Content

[0003] The purpose of the present disclosure is to provide a vertical calibration system for a cylindrical runout measuring table of a rotating shaft, so as to at least partially solve the problems existing in the related art.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a vertical calibration system for a cylindrical surface runout measuring table of a rotating shaft, wherein the measuring table includes a measuring rod that is perpendicular to the point to be measured on the cylindrical surface of the rotating shaft, and includes a first calibration part and a second calibration part, wherein the first calibration part is used to provide a first laser surface that passes through the point to be measured on the cylindrical surface of the rotating shaft and the center of the two end surfaces of the rotating shaft at the same time, and the second calibration part is used to provide a second laser surface that passes through the point to be measured on the cylindrical surface of the rotating shaft and is perpendicular to the center line of the rotating shaft.

[0005] Optionally, the first calibration part includes a frame and a laser mounted on the frame, the frame includes: a first straight rod; two second straight rods, which are spaced apart from each other and respectively mounted on the first straight rod at one end, the two second straight rods are parallel to each other and respectively perpendicular to the first straight rod, and the two second straight rods are of equal length; and two third straight rods, which are respectively mounted on the ends of the corresponding second straight rods away from the first straight rod, the third straight rods are respectively perpendicular to the first straight rod and the second straight rod, wherein the laser is mounted on the first straight rod and is located at a central position between the two second straight rods, and is used to emit the first laser surface perpendicular to the first straight rod, and the two third straight rods are respectively used to be attached to the cylindrical surface of the rotating shaft and extend along the axial direction of the rotating shaft.

[0006] Optionally, the third straight rod has a circular cross-section and is welded to an end of the second straight rod.

[0007] Optionally, a connecting member for connecting the first straight rod and the second straight rod is further included, and the connecting member can be moved along the length direction of the first straight rod to change the position where the second straight rod is installed on the first straight rod.

[0008] Optionally, the laser is fixed to the first straight rod via a mounting seat, and the mounting seat can be moved along the length direction of the first straight rod to change the position at which the laser is mounted on the first straight rod.

[0009] Optionally, the mounting base can be rotated relative to the first straight rod to adjust the angle of the laser.

[0010] Optionally, the laser is a straight-line laser emitter, and the laser line width emitted by the laser is 0.8 mm-1.2 mm.

[0011] Optionally, the number of the first calibration parts is two and they are respectively located on both sides of the point to be measured on the cylindrical surface of the rotating shaft, and the two first laser surfaces respectively pass through the point to be measured on the cylindrical surface of the rotating shaft.

[0012] Optionally, the second calibration unit includes a laser level, and the laser level is used to emit the second laser surface.

[0013] Optionally, the laser level is further used to emit a third laser plane perpendicular to the second laser plane.

[0014] Through the above technical solution, when measurement is required, firstly, the first calibration part provides a first laser surface that passes through the point to be measured on the cylindrical surface of the rotating shaft and the center of the two end surfaces of the rotating shaft, that is, the first laser surface passes through the point to be measured and coincides with the median vertical plane of the rotating shaft, and the measuring table is adjusted to make the measuring rod coincide with the first laser surface; then, the second calibration part provides a second laser surface that passes through the point to be measured on the cylindrical surface of the rotating shaft and is perpendicular to the axial direction of the rotating shaft, and the measuring table is adjusted to make the measuring rod coincide with the second laser surface. Since the first laser surface coincides with the median vertical plane (it can ensure that the extension line of the measuring rod passes through the center line of the rotating shaft), and the second laser surface is perpendicular to the axial direction of the rotating shaft (it can ensure that the measuring rod is perpendicular to the center line), the first laser surface and the second laser surface can cooperate to ensure the perpendicularity of the measuring rod and the point to be measured, thereby improving the measurement accuracy of the measuring table.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 is a calibration schematic diagram of a vertical calibration system exemplarily shown according to the present disclosure;

[0018] Figure 2 yes Figure 1 Schematic diagram of part A;

[0019] Figure 3 is a calibration front view of a first calibration part exemplarily shown according to the present disclosure;

[0020] Figure 4 yes Figure 3 A calibration side view of the first calibration portion shown in FIG.

[0021] Figure 5 is a schematic diagram of the coordinated use of two first calibration units exemplarily shown in the present disclosure;

[0022] Figure 6 1 is a calibration front view of a second calibration part exemplarily shown according to the present disclosure.

[0023] Description of Reference Numerals

[0024] 1-first calibration part; 11-laser; 12-first straight rod; 13-second straight rod; 14-third straight rod; 15-connecting piece; 2-second calibration part; 21-laser level; 3-rotating shaft; 4-first laser surface; 5-second laser surface; 6-measuring table; 7-third laser surface. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] In the present disclosure, the terms "first", "second", etc. are used to distinguish one element from another element, and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] Reference Figure 1-Figure 6The present disclosure exemplarily shows a vertical calibration system for a cylindrical surface runout measuring table of a rotating shaft, wherein the measuring table 6 includes a measuring rod that is perpendicular to the point to be measured on the cylindrical surface of the rotating shaft 3, which can directly abut against the cylindrical surface of the rotating shaft 3, or can also abut against the cylindrical surface of the rotating shaft 3 indirectly. The cylindrical surface will have runout when rotating to drive the measuring rod to extend and retract, thereby measuring the runout parameters of the cylindrical surface. The vertical calibration system includes a first calibration part 1 and a second calibration part 2, wherein the first calibration part 1 is used to provide a first laser surface 4 that passes through the point to be measured on the cylindrical surface of the rotating shaft 3 and the center of the two end surfaces of the rotating shaft 3 at the same time, that is, the first laser surface 4 coincides with the mid-vertical plane of the rotating shaft 3 passing through the point to be measured, and the second calibration part 2 is used to provide a second laser surface 5 that passes through the point to be measured on the cylindrical surface of the rotating shaft 3 and is perpendicular to the center line of the rotating shaft 3. It should be noted that the two end faces of the rotating shaft 3 do not refer to the parts close to the two ends of the rotating shaft 3. The end faces here refer to the two end faces of the cylindrical part of the rotating shaft 3, that is, the two ends of the cylindrical surface to be measured. The mid-perpendicular plane of the rotating shaft 3 is the plane passing through the center of the two end faces of the rotating shaft 3, and the center line of the rotating shaft 3 is the axis passing through the center of the two end faces of the rotating shaft 3.

[0028] The present disclosure does not limit the specific structure of the first calibration part 1 and the second calibration part 2, as long as they can provide the first laser surface 4 and the second laser surface 5 that meet the above conditions. The present disclosure also does not limit the specific form of the first laser surface 4 and the second laser surface 5, as long as when the measuring rod of the measuring table 6 is placed on the first laser surface 4 and the second laser surface 5, a laser line can be formed on the measuring rod, so that when the laser line and the measuring rod coincide, it can be determined that the measuring rod coincides with the first laser surface 4 and the second laser surface 5. The specific structure of the first calibration part 1 and the second calibration part 2 will be introduced below.

[0029] The present disclosure does not limit the measuring table, for example, it can be a micrometer or a dial indicator, which is usually composed of a probe, a measuring rod, a shockproof spring, a rack, a gear, a hairspring, a round dial and a pointer, etc. Its transmission principle is divided into several types, such as gear chamber transmission, lever gear transmission and lever screw transmission, etc., which converts the general linear displacement (linear motion) into the rotational motion of the pointer through gears or levers, and then reads the length measuring instrument on the dial. Micrometers and dial indicators are comparative measuring tools, which can only measure relative values, not absolute values, and are mainly used to check the shape and position errors (such as roundness, flatness, verticality, circular runout, etc.) of workpieces.

[0030] By using the above technical solution, when measurement is required, firstly, the first calibration part 1 is used to provide a first laser surface 4 that passes through the point to be measured on the cylindrical surface of the rotating shaft 3 and the center of the two end surfaces of the rotating shaft 3, that is, the first laser surface 4 passes through the point to be measured and coincides with the mid-vertical plane of the rotating shaft 3, and the measuring table 6 is adjusted to make the measuring rod coincide with the first laser surface 4; then, the second calibration part 2 is used to provide a second laser surface 5 that passes through the point to be measured and is perpendicular to the center line of the rotating shaft 3, and the measuring table 6 is adjusted to make the measuring rod coincide with the second laser surface 5. Since the first laser surface 4 coincides with the mid-vertical plane of the rotating shaft 3 (it can ensure that the extension line of the measuring rod passes through the center line of the rotating shaft 3), and the second laser surface 5 is perpendicular to the center line of the rotating shaft 3 (it can ensure that the measuring rod is perpendicular to the center line of the rotating shaft 3), the first laser surface 4 and the second laser surface 5 can cooperate to ensure the perpendicularity of the measuring rod and the point to be measured, thereby improving the measurement accuracy of the measuring table.

[0031] The present disclosure does not limit the specific structure of the first calibration unit 1. For example, Figure 1-Figure 4 In the illustrated embodiment, the first calibration part 1 may include a frame and a laser 11 mounted on the frame. The frame may include: a first straight rod 12; two second straight rods 13, which are spaced apart and mounted on the first straight rod 12 at one end, the two second straight rods 13 are parallel to each other and perpendicular to the first straight rod 12, and the two second straight rods 13 are of equal length; and two third straight rods 14, which are mounted on the ends of the corresponding second straight rods 13 away from the first straight rod 12, and the third straight rods 14 may be perpendicular to the first straight rod 12 and the second straight rod 13, respectively. Among them, the laser 11 may be mounted on the first straight rod 12 and located in the center between the two second straight rods 13, and is used to emit a first laser surface 4 perpendicular to the first straight rod 12, and the two third straight rods 14 may be used to be attached to the cylindrical surface of the rotating shaft 3 and extend along the axial direction of the rotating shaft 3, respectively. By configuring the vertical relationship between the first straight rod 12, the second straight rod 13 and the third straight rod 14, and configuring the position of the laser 11, when the frame is "set across" the cylindrical surface, the laser surface emitted by the laser 11 that is perpendicular to the first straight rod 12 can coincide with the median vertical plane of the rotating shaft 3 (passing through the center of the two end surfaces of the rotating shaft 3), and the frame is adjusted according to the position of the point to be measured so that the laser surface passes through the point to be measured and is used as the above-mentioned first laser surface 4. By configuring the frame to this structure, it is only necessary to "set across" the cylindrical surface of the rotating shaft 3 to quickly obtain a laser surface that coincides with the median vertical plane. The operation is convenient and fast, and the angle, position, etc. of the laser surface are accurately positioned. In addition, in some other embodiments, the first calibration part 1 may only include the laser 11. In this case, it is necessary to refer to factors such as the external environment to ensure that the laser surface formed by it can coincide with the median vertical plane of the rotating shaft 3.

[0032] It should be noted that the perpendicularity between the first laser surface 4 emitted by the laser 11 and the first straight rod 12 needs to be ensured by the installation angle between the laser 11 and the first straight rod 12, which has no direct relationship with the positional relationship between the multiple straight rods disclosed in the present invention.

[0033] Reference Figure 4 In the embodiment of the present disclosure, the cross section of the third straight rod 14 can be circular and welded to the end of the second straight rod 13. With such a design, the third straight rod 14 can maintain a tangent relationship with cylindrical surfaces of different diameters. In addition, when the position of the frame is adjusted so that the first laser surface 4 passes through the point to be measured, it can be conveniently moved along the cylindrical surface, and during the movement process, the third straight rod 14 can always remain attached to the cylindrical surface and extend along the axial direction of the rotating shaft 3, thereby improving the applicability of the vertical calibration device.

[0034] Reference Figure 2 and Figure 4 In the embodiment of the present disclosure, the vertical calibration system may further include a connector 15 for connecting the first straight rod 12 and the second straight rod 13, and the connector 15 may be moved along the length direction of the first straight rod 12 to change the position where the second straight rod 13 is installed on the first straight rod 12. The connector 15 can realize the connection and fixation of the first straight rod 12 and the second straight rod 13 on the one hand, and can adjust the distance between the two second straight rods 13 according to the different adaptability of the diameter of the cylindrical surface on the other hand.

[0035] The present disclosure does not limit the specific structure of the connector 15. For example, in some embodiments, the connector 15 can be a T-shaped aluminum alloy connector with a locking function, which includes two through holes perpendicular to each other. Among them, one extending in the vertical direction is a blind hole and is used for the second straight rod 13 to extend into, and the locking function can be achieved by screwing the top screw on the connector to tighten the second straight rod 13. The one extending in the horizontal direction is a through hole and is used for the first straight rod 12 to extend into. The connector can move along the length direction of the first straight rod 12 to adjust the position of the second straight rod 13, and the part of the connector corresponding to the first straight rod 12 can be constructed as a movable structure (similar to a clamp structure with a single-side opening), that is, the inner diameter of the through hole is adjustable, and a tightening bolt is provided at the position corresponding to the movable structure. By screwing the tightening bolt, the movable structure can be locked and the inner diameter of the through hole can be reduced to hold the first straight rod 12 tightly to achieve the locking function. In addition, in some other embodiments, self-locking can also be achieved by configuring the matching clearance (such as interference fit) between the through hole and the blind hole and the first straight rod 12 and the second straight rod 13, and the present disclosure does not limit this. In the embodiment of the present disclosure, the laser 11 can be fixed to the first straight rod 12 by a mounting seat (not shown in the figure), and the mounting seat can move along the length direction of the first straight rod 12 to change the position where the laser 11 is installed on the first straight rod 12, thereby ensuring that the laser 11 can always be located in the middle of the two second straight rods 13. The present disclosure does not limit the specific structure of the mounting seat. For example, it can have a through hole for the first straight rod 12 to pass through, and the mounting seat can drive the laser 11 to move along the length direction of the first straight rod 12. Similar to the above-mentioned connecting member 15, the mounting seat can be constructed as a movable structure (similar to a clamp structure with a single-side opening), that is, the inner diameter of the through hole is adjustable, and a tightening bolt can be provided at the position corresponding to the movable structure. By screwing the tightening bolt, the movable structure can be locked, thereby reducing the inner diameter of the through hole and thus holding the first straight rod 12 to achieve the locking function. In addition, in some other embodiments, self-locking can also be achieved by configuring a matching gap (such as an interference fit) between the through hole and the first straight rod 12, and when movement is required, an external force greater than the friction force of the interference fit can be applied.

[0036] Furthermore, in order to ensure that different heights of different measuring tables are adapted, in the embodiment of the present disclosure, the mounting seat can be rotated relative to the first straight rod 12 to adjust the angle of the laser 11. Since the mounting seat and the first straight rod 12 are provided with a locking function, the mounting seat and the first straight rod 12 can be ensured to remain stationary after the angle is adjusted and locked.

[0037] It should be noted that in addition to the above-mentioned implementation method, in some other embodiments, the position of the connecting member 15 and the mounting seat on the first straight rod 12 can be adjusted and locked by other structures such as pins and nuts.

[0038] The present disclosure does not limit the type of the laser 11. For example, in the embodiments of the present disclosure, the laser 11 may be a straight-line laser emitter, and the laser line width emitted by the laser 11 may be 0.8 mm-1.2 mm, specifically 0.8 mm, 1 mm, 1.2 mm, etc. By configuring the laser line width to be narrower, the accuracy of placing the measuring rod to coincide with the first laser surface 4 can be ensured.

[0039] Reference Figure 5 In the embodiment of the present disclosure, the number of the first calibration parts 1 is two and they are respectively located on both sides of the point to be measured on the cylindrical surface of the rotating shaft 3, and the two first laser surfaces 4 pass through the point to be measured on the cylindrical surface of the rotating shaft 3. With such a design, by setting two first laser surfaces 4 to shoot at each other, the accuracy of close-range calibration can be improved. And by observing whether the two first laser surfaces 4 overlap, it can be determined whether the two first calibration parts 1 themselves are in a usable state, thereby ensuring the accuracy of the position of the first laser surfaces 4. In other words, when one of the first calibration parts 1 has its first laser surface 4 not overlap with the mid-vertical plane passing through the point to be measured due to some reasons, in this case, if only one first calibration part 1 is set, the deviation of the first laser surface 4 will cause the verticality of the measuring rod to be poor with respect to the point to be measured. Setting two first calibration parts 1 can immediately detect and re-calibrate when the first laser surface 4 provided by one of them deviates.

[0040] The present disclosure does not limit the second calibration unit 2. Figure 1 and Figure 6 In the illustrated embodiment, the second calibration unit 2 may include a laser level 21, which may be used to emit the second laser plane 5. Since the structure and working principle of the laser level 21 are well known to those skilled in the art, no further introduction is given here. It should be noted that during measurement, the operator may adjust the second laser plane 5 to pass through the point to be measured and be perpendicular to the axial direction of the rotating shaft 3 by using external reference objects, etc., and the present disclosure does not limit the specific adjustment process.

[0041] Reference Figure 1 In the embodiment of the present disclosure, the laser level 21 can also be used to emit a third laser plane 7 perpendicular to the second laser plane 5. With such a design, a line parallel to the center line of the rotating shaft 3 can be drawn at the laser line position on the ground emitted by the third laser plane 7 of the laser level 21, which serves as a reference trajectory for the axial movement of the laser level 21, so as to calibrate the verticality of the measuring rod and the point to be measured when measuring the circular runout of other points on the same cylindrical surface of the rotating shaft 3.

[0042] Finally, in order to facilitate the understanding of the disclosed solution, the following will be combined with Figure 1-Figure 6 The use process of the vertical calibration system is introduced, specifically:

[0043] (1) Calibrate the first calibration part 1 to ensure that the laser 11 is located in the middle of the two second straight rods 13 and the direction of the laser emitted by the laser 11 is perpendicular to the first straight rod 12; adjust the two second straight rods 13 to be parallel to each other, equal in length and perpendicular to the first straight rod 12, and the two third straight rods 14 to be parallel to and perpendicular to both the second straight rods 13 and the first straight rod 12.

[0044] (2) Two sets of first calibration parts 1 are placed oppositely on the measured cylindrical surface of the rotating shaft 3 or its concentric cylindrical surface, so that the third straight rod 14 is kept in parallel contact with the cylindrical surface.

[0045] (3) The first calibration part 1 is moved along the circumference of the contact position so that the first laser surface 4 emitted by it can pass through the point to be measured and face each other, and temporary measures are taken to fix the first calibration part 1.

[0046] (4) Keeping the measuring point unchanged, adjust the center line of the measuring rod (measuring needle) of the measuring table to coincide with the first laser surface 4, that is, to be located on the median perpendicular plane of the rotating shaft 3 where the measuring point is located.

[0047] (5) Install a laser level on the upper side of the cylindrical surface to be measured of the rotating shaft 3, and use the end face of the reference equipment or other reference surface to make the second laser plane 5 pass through the point to be measured and be perpendicular to the axial direction of the rotating shaft 3.

[0048] (6) Keeping the measuring point unchanged, adjust the measuring table so that the center line of its measuring rod (measuring needle) coincides with the median perpendicular plane and the second laser plane 5 at the same time, that is, it is perpendicular to the cylindrical surface of the rotating shaft 3 where the measuring point is located in both the radial and axial directions.

[0049] (7) Mark the position of the laser line projected on the ground by the second laser surface 5 of the laser level 21 (i.e., make a line parallel to the center line of the rotating shaft 3) as a reference trajectory for the axial movement of the laser level 21.

[0050] (8) Remove the first calibration part 1 (except for the one installed on a stationary concentric cylindrical surface), rotate the rotating shaft 3, and measure the circular runout value corresponding to the point to be measured.

[0051] (9) Move the laser level 21 along the marked straight line (i.e., the reference trajectory) so that its second laser surface 5 passes through the next measured point, adjust the angle of the measuring rod according to the second laser surface 5 corresponding to the new measured point, and use the first calibration part 1 to calibrate the verticality of the measuring rod. Finally, measure the runout value of the circle where the measured point is located.

[0052] (10) Use the same method to measure the circular runout of other parts of the shaft 3.

[0053] The verticality deviation between the center line of the measuring rod and the measuring needle of the conventional manual visual observation calibration measuring table and the plane where the measured point is located is generally controlled to be no more than 15°. After testing, the technology disclosed in the present invention can ensure that the deviation does not exceed 3°.

[0054] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0056] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vertical calibration system for a cylindrical surface runout measuring table of a rotating shaft, the measuring table comprising a measuring rod for being perpendicular to a point to be measured on the cylindrical surface of the rotating shaft, characterized in that: The method comprises a first calibration part and a second calibration part, wherein the first calibration part is used to provide a first laser surface that passes through the point to be measured on the cylindrical surface of the rotating shaft and the center of the two end surfaces of the rotating shaft at the same time, and the second calibration part is used to provide a second laser surface that passes through the point to be measured on the cylindrical surface of the rotating shaft and is perpendicular to the center line of the rotating shaft.

2. The vertical calibration system according to claim 1, characterized in that: The first calibration unit includes a frame and a laser mounted on the frame, and the frame includes: First straight shot; Two second straight rods are spaced apart from each other and are respectively mounted on the first straight rod at one end, the two second straight rods are parallel to each other and are respectively perpendicular to the first straight rod, and the two second straight rods are of equal length; and Two third straight rods are respectively mounted on the ends of the corresponding second straight rods away from the first straight rod, and the third straight rods are respectively perpendicular to the first straight rod and the second straight rod. The laser is mounted on the first straight rod and located in the center between the two second straight rods, and is used to emit the first laser surface perpendicular to the first straight rod. The two third straight rods are respectively used to be attached to the cylindrical surface of the rotating shaft and extend along the axial direction of the rotating shaft.

3. The vertical calibration system according to claim 2, characterized in that: The third straight rod has a circular cross section and is welded to the end of the second straight rod.

4. The vertical calibration system according to claim 2, characterized in that: It also includes a connecting piece for connecting the first straight rod and the second straight rod, and the connecting piece can be moved along the length direction of the first straight rod to change the position where the second straight rod is installed on the first straight rod.

5. The vertical calibration system according to claim 4, characterized in that: The laser is fixed to the first straight rod through a mounting seat, and the mounting seat can move along the length direction of the first straight rod to change the position where the laser is mounted on the first straight rod.

6. The vertical calibration system according to claim 5, characterized in that: The mounting seat can be rotated relative to the first straight rod to adjust the angle of the laser.

7. The vertical calibration system according to claim 2, characterized in that: The laser is a straight-line laser emitter, and the laser line width emitted by the laser is 0.8mm-1.2mm.

8. The vertical calibration system according to any one of claims 1 to 7, characterized in that: The number of the first calibration parts is two and they are respectively located on both sides of the point to be measured on the cylindrical surface of the rotating shaft, and the two first laser surfaces respectively pass through the point to be measured on the cylindrical surface of the rotating shaft.

9. The vertical calibration system according to claim 1, characterized in that: The second calibration part includes a laser level, and the laser level is used to emit the second laser surface.

10. The vertical calibration system according to claim 9, characterized in that: The laser level is also used to emit a third laser plane perpendicular to the second laser plane.

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