Rotor radial positioning tool for centering steam turbine rotor

Abstract

The utility model discloses a rotor radial positioning tool for centering a steam turbine rotor, which comprises a support frame, two groups of rotating rods are symmetrically arranged on the support frame, and the support frame is rotatably connected with the rotating rods; an angle adjusting disc is installed on the upper surface of the supporting frame, two sets of rotating rods can be fixed to the angle adjusting disc, and rolling wheels are installed at the ends of the two sets of rotating rods; a supporting rod is installed at the bottom of the supporting frame and is kept perpendicular to the horizontal split face of the air cylinder. The rotor radial positioning tool provided by the utility model can carry out radial positioning on the steam turbine rotor in the process of centering the steam turbine rotor, and compared with the existing crane, the rotor radial positioning tool can prevent the rotor from shaking in the bearing in the radial direction, and improves the accuracy of measured data.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary tools for steam turbine installation, and in particular relates to a rotor radial positioning tool used for centering a steam turbine rotor. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The purpose of turbine rotor centering is to connect the center lines of the turbine generator set rotors into a smooth curve, to make the center line of the coupling connecting the rotors a continuous axis, and at the same time, to keep the stationary part of the turbine and the rotor parts basically concentric. The center deviation value does not exceed the specified value, ensuring that the radial clearance of the dynamic and static parts can be adjusted to the specified allowable range.

[0004] In the process of centering the turbine rotor, the existing installation technology is mostly to keep the rotor in a free state and place it in the cylinder. At the bearing position, there is a large uneven radial clearance between the journal and the bearing, especially for the tilting pad bearing. When the crane is started to drive the rotor to rotate and measure the data, it is found that the radial data is not exactly the same after multiple measurements. Only by measuring multiple times and strictly controlling the speed and stability of the crane can the real and usable data be found. In the prior art, Chinese utility model patent CN207454041 U discloses a rotor wheel centering detection tool suitable for different types of turbines. The axial position of the inclined iron and the positioning block is adjusted to meet the fixing requirements of different wheel apertures. However, the above structure can only realize the measurement of the turbine rotor during the centering process. When the turbine rotor needs to be adjusted, the cooperation of the crane is still required to achieve it. The existing rotational shaking has different degrees of influence on the measurement data, which is not conducive to judging the matching degree between the rotor and the cylinder center. Utility Model Content

[0005] The utility model aims to provide a rotor radial positioning tool for steam turbine rotor centering, which can radially position the steam turbine rotor during the process of steam turbine rotor centering, avoid radial shaking of the rotor in the bearing, and improve the accuracy of measurement data.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a rotor radial positioning tool for finding the center of a turbine rotor, comprising a support frame, on which two groups of rotating rods are symmetrically arranged, and the support frame and the rotating rods are rotatably connected; an angle adjustment disk is installed on the upper surface of the support frame, and the two groups of rotating rods can be fixed to the angle adjustment disk, and rollers are installed at the ends of the two groups of rotating rods; a support rod is installed at the bottom of the support frame, and the support rod is kept perpendicular to the horizontal center plane of the cylinder.

[0008] As a further technical solution, the angle adjustment plate is installed on the upper surface of the support frame through a connecting rod, and the angle adjustment plate has an arc-shaped structure.

[0009] As a further technical solution, a plurality of angle positioning pin holes are evenly arranged on the angle adjustment disk, and the plurality of angle positioning pin holes are distributed in an arc shape on the angle adjustment disk.

[0010] As a further technical solution, an angle positioning pin hole is provided on the rotating rod, and the positioning pin passes through the angle positioning pin hole on the rotating rod and the positioning pin hole on the angle adjustment disk to fix the rotating rod and the angle adjustment disk.

[0011] As a further technical solution, the support frame adopts a rectangular plate structure, and two groups of rotating rods are symmetrically installed on the side of the support frame with respect to the axis of the support frame through the rotating axis.

[0012] As a further technical solution, each set of rotating rods includes two rotating rods, one end of the two rotating rods is rotatably mounted on two opposite sides of the support frame, and the other ends of the two rotating rods are connected through a roller shaft, and a roller is installed on the roller shaft.

[0013] As a further technical solution, the angle adjustment plate is located between the two rotating rods of each group of rotating rods.

[0014] As a further technical solution, the support rod includes a first support rod and a second support rod, a threaded hole is set at one end of the first support rod, and a screw rod is set at one end of the second support rod, and the first support rod and the second support rod are connected through the threaded hole and the screw rod.

[0015] As a further technical solution, the other end of the first support rod is fixedly connected to the bottom of the support frame, and the other end of the second support rod is provided with a cylinder lug.

[0016] As a further technical solution, the cylinder ear is L-shaped, and the cylinder ear is close to the vertical end surface and the horizontal end surface of the lower cylinder.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The rotor radial positioning tool provided by the utility model can radially position the steam turbine rotor during the process of finding the center of the steam turbine rotor. Compared with the existing use of a crane, it can avoid radial shaking of the rotor in the bearing and improve the accuracy of measurement data.

[0019] The rotor radial positioning tool provided by the utility model rotatably connects a rotating rod with a supporting frame, and a roller is arranged at the end of the rotating rod, which can rotate to clamp the shaft neck of the turbine rotor between the two rollers, and the angle of the angle adjustment disk can be adjusted according to the size of the rotor shaft neck. The rotating rod is locked by means of an angle positioning pin to achieve radial positioning of the rotor; the roller is made of rubber material, and the arranged roller can avoid damage to the surface of the rotor.

[0020] The rotor radial positioning tool provided by the utility model sets the support rod in the form of a threaded rod and a threaded hole connection, and can adjust the length of the connected support rod according to the actual distance between the rotor and the cylinder. At the same time, a cylinder ear is set at the bottom of the support rod, and the size of the cylinder ear can be increased or decreased according to the actual length of the vertical surface of the cylinder, so as to ensure that the support rod and the horizontal center plane of the cylinder are kept vertical, and the ear is closely attached to the vertical end surface and the horizontal end surface of the lower cylinder, so as to ensure that the support rod does not move, so that the measurement data is not affected by uneven force.

[0021] The rotor radial positioning tool provided by the utility model cooperates with each other through the rotating rod, the angle adjustment disk, and the connecting extension screw rod. On the basis of ensuring the accuracy of measurement data, it has the applicability to be operated on rotors of different specifications; through the characteristics of adjustable length and angle, the tool can be used at the shaft neck position of rotors of different sizes, and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 It is a front view of the rotor radial positioning tool of the utility model;

[0024] Figure 2 It is a side view of the rotor radial positioning tool of the utility model.

[0025] The schematic diagram is for illustrative purposes only;

[0026] Among them, 1. roller; 2. rotating rod; 3. angle positioning pin hole; 4. angle adjustment plate; 5. connecting rod; 6. rotating shaft; 7. support frame; 8. support rod; 801, first support rod; 802, second support rod; 9, cylinder ear. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] Example 1

[0029] In a typical implementation of the present invention, Figure 1 and Figure 2 As shown, a rotor radial positioning tool for centering a turbine rotor is provided, comprising a support frame 7, on which two groups of rotating rods 2 are symmetrically arranged, and the support frame 7 and the rotating rods 2 are rotatably connected; an angle adjustment disk 4 is installed on the upper surface of the support frame 7, and the two groups of rotating rods 2 can be fixed to the angle adjustment disk 4, and rollers 1 are installed at the ends of the two groups of rotating rods 2; a support rod 8 is installed at the bottom of the support frame 7, and when in use, the support rod 8 remains perpendicular to the horizontal center plane of the cylinder.

[0030] Furthermore, the angle adjustment plate 4 is installed on the upper surface of the support frame through the connecting rod 5, so that the bottom of the angle adjustment plate is separated from the upper surface of the support frame by a certain distance, and the angle adjustment plate 4 is an arc-shaped structure, the upper end of the connecting rod 5 is fixed to the middle position of the angle adjustment plate 4, and the lower end is fixed to the center position of the support frame 7, so as to support the angle adjustment plate.

[0031] Furthermore, a plurality of angle positioning pin holes 3 are evenly arranged on the angle adjustment disk 4, and the plurality of angle positioning pin holes 3 are distributed in an arc shape on the angle adjustment disk.

[0032] Furthermore, the rotating rod 2 is also provided with an angle positioning pin hole, and the positioning pin passes through the angle positioning pin hole on the rotating rod 2 and the positioning pin hole on the angle adjustment disk 4 to fix the rotating rod 2 and the angle adjustment disk 4. When the positioning pin hole on the rotating rod 2 is a circular hole, the curvature of the angle adjustment disk on both sides of the axis of the angle adjustment disk 4 should be the curvature formed with the rotating shaft 6 installed between the rotating rod and the support frame as the center, so that the positioning pin hole on the rotating rod 2 and the positioning pin hole on the rotating rod 2 correspond to each other, so as to achieve the fixation of the rotating rod and the angle adjustment disk. Of course, the positioning pin hole on the rotating rod 2 can also be set as a long slot hole, so that there is no restriction on the curvature of the angle adjustment disk, and the rotating rod and the angle adjustment disk are fixed by bolts.

[0033] In this embodiment, the support frame 7 adopts a rectangular plate structure, and two groups of rotating rods are symmetrically installed on the side of the support frame 7 with respect to the axis of the support frame through the rotating shaft 6.

[0034] Furthermore, each set of rotating rods includes two rotating rods, one end of the two rotating rods is rotatably mounted on two opposite sides of the support frame 7, and the other ends of the two rotating rods are connected through a roller shaft, and a roller 1 is installed on the roller shaft. By adjusting the rotation angle of the rotating rod, the turbine rotor shaft neck can be clamped between the two rollers, and the opening angle of the two sets of rotating rods can be adjusted according to the size of the rotor shaft neck, and the rotating rod and the angle adjustment disk are locked with the help of positioning pins.

[0035] In this embodiment, the angle adjustment disk is located between the two rotating rods of each group of rotating rods. The highest point on the upper surface of the angle adjustment disk supports the shaft neck of the turbine rotor and cooperates with the rollers on both sides to realize radial positioning of the turbine rotor.

[0036] In this embodiment, the support rod 8 includes a first support rod 801 and a second support rod 802. A threaded hole is set at one end of the first support rod 801, and a screw rod is set at one end of the second support rod 802. The first support rod 801 and the second support rod 802 are connected by the threaded hole and the screw rod. Through this structure, the height of the support rod can be adjusted according to the actual distance between the rotor and the cylinder.

[0037] Furthermore, the other end of the first support rod 801 is fixedly connected to the bottom of the support frame 7, and the other end of the second support rod 802 is provided with a cylinder lug 9.

[0038] Furthermore, the cylinder ear is L-shaped, and the cylinder ear is closely attached to the vertical end surface and the horizontal end surface of the lower cylinder.

[0039] During the centering process of the turbine rotor, especially the tilting pad bearing, the rotor has radial shaking in the bearing, which affects the accuracy of the center data. This tool can be used to radially locate the turbine rotor.

[0040] When in use, with the help of the radial positioning tool, the turbine journal is clamped between the two rollers. The angle of the angle adjustment plate can be adjusted according to the size of the rotor journal, and the rotating rod can be locked with the help of the angle positioning pin; the length of the connecting support rod can be adjusted according to the actual distance between the rotor and the cylinder. The size of the cylinder lug is increased or decreased according to the actual length of the vertical surface of the lower cylinder to ensure that the tool is perpendicular to the horizontal center plane of the cylinder, and the lug is pressed against the vertical end face and horizontal end face of the lower cylinder to ensure that the tool does not move, so that the measurement data is not affected by uneven force.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotor radial positioning tool for centering a steam turbine rotor, characterized in that: It includes a support frame, on which two groups of rotating rods are symmetrically arranged, and the support frame and the rotating rods are rotatably connected; an angle adjustment plate is installed on the upper surface of the support frame, and the two groups of rotating rods can be fixed to the angle adjustment plate, and rollers are installed at the ends of the two groups of rotating rods; a support rod is installed at the bottom of the support frame, and the support rod is kept perpendicular to the horizontal center plane of the cylinder.

2. The rotor radial positioning tool for centering a steam turbine rotor according to claim 1, characterized in that: The angle adjustment plate is installed on the upper surface of the support frame through a connecting rod, and the angle adjustment plate is an arc-shaped structure.

3. The rotor radial positioning tool for centering a steam turbine rotor according to claim 2, characterized in that: A plurality of angle positioning pin holes are evenly arranged on the angle adjustment disk, and the plurality of angle positioning pin holes are distributed in an arc shape on the angle adjustment disk.

4. The rotor radial positioning tool for centering a steam turbine rotor according to claim 3, characterized in that: The rotating rod is provided with an angle positioning pin hole, and the positioning pin passes through the angle positioning pin hole on the rotating rod and the positioning pin hole on the angle adjustment disk to fix the rotating rod and the angle adjustment disk.

5. The rotor radial positioning tool for centering a steam turbine rotor according to claim 1, characterized in that: The support frame adopts a rectangular plate structure, and two groups of rotating rods are symmetrically installed on the side of the support frame with respect to the axis of the support frame through the rotating shaft.

6. The rotor radial positioning tool for centering a steam turbine rotor according to claim 5, characterized in that: Each set of rotating rods includes two rotating rods, one end of the two rotating rods is rotatably mounted on two opposite side surfaces of the support frame, and the other ends of the two rotating rods are connected through a roller shaft, and a roller is mounted on the roller shaft.

7. The rotor radial positioning tool for centering a steam turbine rotor according to claim 6, characterized in that: The angle adjustment plate is located between the two rotating rods of each group of rotating rods.

8. The rotor radial positioning tool for centering a steam turbine rotor according to claim 1, characterized in that: The support rod comprises a first support rod and a second support rod, a threaded hole is arranged at one end of the first support rod, a screw rod is arranged at one end of the second support rod, and the first support rod and the second support rod are connected via the threaded hole and the screw rod.

9. The rotor radial positioning tool for centering a steam turbine rotor according to claim 8, characterized in that: The other end of the first support rod is fixedly connected to the bottom of the support frame, and the other end of the second support rod is provided with a cylinder lug.

10. The rotor radial positioning tool for centering a steam turbine rotor according to claim 9, characterized in that: The cylinder lug is L-shaped and is closely attached to the vertical end surface and the horizontal end surface of the lower cylinder.

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