Steam turbine rotor limiting tool

Abstract

The utility model discloses the field of limiting devices, and particularly relates to a steam turbine rotor limiting tool which comprises a connecting plate, a limiting bolt and a fastening bolt are arranged on the connecting plate, a copper sheet is fixedly connected to the end, away from the head of the limiting bolt, of the limiting bolt, and the thickness of the copper sheet ranges from 0.8 mm to 1.5 mm. The limiting tool provided by the utility model is helpful for preventing or reducing the displacement of the rotor.

Description

Technical Field

[0001] The utility model belongs to the field of limiting devices, in particular to a limiting tool for a steam turbine rotor. Background Art

[0002] Precise alignment of the turbine generator set's shafting is a crucial step during oil leakage testing. This process typically requires rotating the rotor using a crane or other means. This process introduces axial play in the rotating components, the extent of which increases with the weight of the rotating components and the length of the shafting. This axial play also increases the risk of contact or friction between the rotating and stationary components.

[0003] Once contact or friction occurs, the mildest case may cause slight scratches on the surface between the blade root and the partition; in more serious cases, it may cause deformation, bending or abnormal noise of rotating and stationary parts; in extreme cases, such contact or friction may even cause serious damage to the equipment, such as permanent deformation of the shaft system or damage to key components.

[0004] Therefore, it is of positive significance to design a limiting tooling that can effectively prevent rotor movement or reduce the amount of rotor movement. Utility Model Content

[0005] The utility model aims to provide a steam turbine rotor limiting tool to prevent or reduce the movement of the rotor.

[0006] A steam turbine rotor limiting fixture in this solution includes a connecting plate, on which a limiting bolt and a fastening bolt are provided. The limiting bolt is fixedly connected to an end away from its head with a copper sheet having a thickness of 0.8 to 1.5 mm.

[0007] The working principle and beneficial effects of this solution are as follows: During use, the connecting plate is mounted to the base by tightening the bolts, ensuring that the limit bolts are parallel to the rotor axis. The copper sheet is then secured against the rotor shoulder, positioned to the side of the rotor's movement. The stop bolts and copper sheet prevent or effectively reduce rotor movement. The copper sheet is softer than the rotor shoulder, preventing scratches.

[0008] Furthermore, a gasket is provided between the head of the fastening bolt and the connecting plate, which helps to improve the stability of the connection between the connecting plate and the base.

[0009] Furthermore, a paint assembly is provided on the connecting plate, and the paint assembly includes a first hydraulic cylinder, a lubricating oil cylinder, a material guide pipe and a paint ring connected in sequence; a push plate is provided in the lubricating oil cylinder, and the push plate is fixedly connected to the telescopic rod of the first hydraulic cylinder; the paint ring is sleeved on the limit bolt and close to the copper sheet, and there is a gap between the paint ring and the limit bolt, and a cavity is provided in the paint ring, and paint holes connected to the cavity are distributed on the side of the paint ring facing the limit bolt, and the material guide pipe is connected to the paint ring at one end away from the lubricating oil cylinder.

[0010] In the process of the copper sheet against the rotor shoulder, since the weight of the rotor reaches tens or hundreds of tons, when the rotor rotates, the rotor shoulder and the copper sheet generate high temperature due to friction, so lubricating oil is needed to reduce the friction between the two, so as to avoid scratching the rotor shoulder. Through the setting of the coating assembly, when lubricating oil needs to be applied, the telescopic rod of the first hydraulic cylinder is extended to drive the push plate to push the lubricating oil in the lubricating oil barrel through the guide pipe into the coating ring, and then the limit bolt is coated with lubricating oil through the coating hole. Since the copper sheet is close to the coating ring, the lubricating oil can also diffuse to the copper sheet. The reason for setting the coating barrel close to the copper sheet is to avoid contact between the coating barrel and the rotor shoulder, and the copper sheet itself is very thin, so the lubricating oil can diffuse normally to the copper sheet.

[0011] Furthermore, the distance between the paint ring and the limit bolt is 0.1 to 0.2 mm. The reduced spacing distance helps to reduce the waste of lubricating oil while ensuring the normal passage of the limit bolt.

[0012] Furthermore, the connecting plate is provided with an air reservoir, with a second hydraulic cylinder and an air guide tube at each end. A push plate is also located within the air reservoir, fixedly connected to the telescopic rod of the second hydraulic cylinder. An annular airbag is provided on the side of the coating ring facing away from the copper sheet. The coating ring is provided with a retaining plate, with the airbag positioned between the retaining plate and the coating ring. The end of the air guide tube facing away from the air reservoir is connected to the airbag. The telescopic rod of the second hydraulic cylinder extends, driving the push plate toward the air guide tube. Gas enters the airbag. Because the airbag is limited by the retaining plate and the coating ring, it can only move toward the limit bolt, thereby blocking the side of the coating ring facing away from the copper sheet. During lubricant application, once the lubricant fills the gap between the coating ring and the retaining bolt, it can only move toward the copper sheet, effectively coating the copper sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a steam turbine rotor limiting tooling according to Example 1 of the utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the structure after the limiting fixture is connected to the rotor shaft;

[0015] Figure 3This is a schematic structural diagram of a steam turbine rotor limiting fixture according to Example 2 of the present utility model;

[0016] Figure 4 for Figure 3 A magnified view of point A in the figure;

[0017] Figure 5 for Figure 3 In the middle, the right view shows the relative positions of the copper sheet, the coating ring, the material guide tube, and the air guide tube;

[0018] Figure 6 for Figure 3 Bottom view of the center limit fixture. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The figure marks in the drawings of the specification include: limit bolt 1, connecting plate 2, copper sheet 3, fastening bolt 4, gasket 5, shaft shoulder 6, base 7, first hydraulic cylinder 8, lubricating oil cylinder 9, material guide pipe 10, paint ring 11, baffle 12, air guide pipe 13, second hydraulic cylinder 14, and air storage cylinder 15.

[0021] In this application, in order to better reflect the improvements, the components in the drawings are not drawn completely according to the actual size ratio.

[0022] Example 1 is basically as shown in the attached Figure 1 As shown: A steam turbine rotor limiting fixture, including a rectangular connecting plate, a limiting bolt 1 and two fastening bolts 4 are provided on the connecting plate 2, and the two fastening bolts 4 are located on the same horizontal plane ( Figure 1 perspective), the fastening bolt 4 is parallel to the limiting bolt 1, and two gaskets 5 of different thicknesses are provided between the head of the fastening bolt 4 and the connecting plate 2; the limiting bolt 1 and the fastening bolt 4 are both threadedly connected to the connecting plate 2, and the threaded sections of both extend to the outside of the connecting plate 2, that is, the length of the threaded section is greater than the thickness of the connecting plate 2; a circular copper sheet 3 is welded to the end of the limiting bolt 1 away from its head, and the copper sheet 3 is of equal diameter and coaxial with the limiting bolt 1, and the thickness of the copper sheet 3 is 1 mm.

[0023] The specific implementation process is as follows: When in use, install the connecting plate 2 to the base 7 by tightening the bolts 4, and ensure that the limit bolts 1 are parallel to the axis of the rotor, and then ensure that the copper sheet 3 is against the shoulder 6 of the rotor, and the copper sheet 3 is located on the side of the rotor movement direction, as shown in the attached figure. Figure 2 shown.

[0024] Example 2 is basically as shown in the attached Figures 3 to 6As shown, the only difference between it and Example 1 is that it also includes a paint assembly and a material blocking assembly, and the paint assembly includes a first hydraulic cylinder 8, a lubricating oil cylinder 9, a material guide pipe 10 and a paint ring 11 connected in sequence; the first hydraulic cylinder 8 and the lubricating oil cylinder 9 can be detachably connected to the connecting plate 2, and a push plate is provided in the lubricating oil cylinder 9, and the push plate is fixedly connected to the telescopic rod of the first hydraulic cylinder 8; the paint ring 11 is sleeved on the limit bolt 1 and close to the copper sheet 3, and close to the copper sheet 3 refers to the connection between the limit bolt 1 and the copper sheet 3; there is a gap of 0.15mm between the paint ring 11 and the limit bolt 1, and an annular cavity is provided in the paint ring 11, which is coaxial with the paint ring 11, and the side of the paint ring 11 facing the limit bolt 1 is evenly distributed with paint holes connected to the cavity, and the end of the material guide pipe 10 away from the lubricating oil cylinder 9 is connected to the paint ring 11.

[0025] The material blocking assembly includes a second hydraulic cylinder 14, an air cylinder 15, an air guide tube 13, a baffle and an airbag. The air cylinder 15 and the second hydraulic cylinder 14 are both detachably connected to the connecting plate 2. The two ends of the air cylinder 15 are respectively connected to the second hydraulic cylinder 14 and the air guide tube 13. A push plate is also provided in the air cylinder 15, which is fixedly connected to the telescopic rod of the second hydraulic cylinder 14. The airbag is annular and fixedly connected to the side of the paint ring 11 away from the copper sheet 3. The cross-section of the baffle is "L"-shaped. One end of the baffle is fixedly connected to the side of the paint ring 11 away from the copper sheet 3, and the other side of the baffle extends toward the side of the limit bolt 1 and blocks the airbag. The airbag is located between the baffle 12 and the paint ring 11, and the end of the air guide tube 13 away from the air cylinder 15 is connected to the airbag.

[0026] The specific implementation process is as follows: Since the positions of the coating assembly and the material retaining assembly are fixed, the installation process of the limiting fixture in Example 2 is consistent with that in Example 1. The only difference lies in the application of lubricating oil. When lubricating oil is needed, the telescopic rod of the second hydraulic cylinder 14 is first extended, driving the push plate to move toward the air guide tube 13, and gas enters the airbag. Because the airbag is limited by the retaining plate 12 and the coating ring 11, the airbag can only move toward the limiting bolt 1, thereby blocking the side of the coating ring 11 away from the copper sheet 3. The telescopic rod of the first hydraulic cylinder 8 is then extended, driving the push plate to push the lubricating oil in the lubricating oil barrel 9 through the material guide tube 10 into the coating ring 11. The lubricating oil is then applied to the limiting bolt 1 through the coating hole. When the lubricating oil fills the gap between the coating ring 11 and the limiting bolt 1, the lubricating oil moves toward the copper sheet 3 and is applied.

[0027] In this application, the first hydraulic cylinder 8 and the second hydraulic cylinder 14 can be connected to the controller in the oil seepage test system, and conventional programming is used to enable the controller to control the first hydraulic cylinder 8 and the second hydraulic cylinder 14, thereby achieving automatic control of lubricating oil coating.

[0028] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A steam turbine rotor limiting fixture, comprising a connecting plate, a limiting bolt and a fastening bolt provided on the connecting plate, characterized in that: A copper sheet is fixedly connected to the end of the limiting bolt away from its head, and the thickness of the copper sheet is 0.8 to 1.5 mm; a paint assembly is provided on the connecting plate, and the paint assembly includes a first hydraulic cylinder, a lubricating oil cylinder, a material guide pipe and a paint ring connected in sequence; a push plate is provided in the lubricating oil cylinder, and the push plate is fixedly connected to the telescopic rod of the first hydraulic cylinder; the paint ring is sleeved on the limiting bolt and close to the copper sheet, there is a gap between the paint ring and the limiting bolt, a cavity is provided in the paint ring, and paint holes connected to the cavity are distributed on the side of the paint ring facing the limiting bolt, and the end of the material guide pipe away from the lubricating oil cylinder is connected to the paint ring.

2. The steam turbine rotor limiting fixture according to claim 1, characterized in that: A gasket is provided between the head of the fastening bolt and the connecting plate.

3. The steam turbine rotor limiting fixture according to claim 2, characterized in that: The distance between the paint ring and the limiting bolt is 0.1-0.2 mm.

4. The steam turbine rotor limiting fixture according to claim 3, characterized in that: An air cylinder is also provided on the connecting plate, and a second hydraulic cylinder and an air guide tube are respectively provided at both ends of the air cylinder. A push plate is also provided in the air cylinder, and the push plate is fixedly connected to the telescopic rod of the second hydraulic cylinder. An annular air bag is provided on the side of the paint ring away from the copper sheet, and a baffle is provided on the paint ring. The air bag is located between the baffle and the paint ring, and the end of the air guide tube away from the air cylinder is connected to the air bag.

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