Device for measuring abrasion loss of supporting bearing of steam turbine

Abstract

A turbine support bearing abrasion loss measuring device relates to the field of turbine maintenance. The problems that when the supporting bearing of the steam turbine needs to be checked, the supporting bearing needs to be detached from the interior of the steam turbine, the detection workload is large, and the working efficiency is low are solved. The connecting nut is used for connecting the micrometer and the micrometer; the bottom of a threaded connector of the micrometer is fixed to the top of a bearing box cover through threaded connection, the micrometer is connected with the top end of the threaded connector of the micrometer through a connecting nut, and the threaded rod is rotated downwards to make the connecting position of the threaded rod and the measuring rod move downwards under the acting force of the threaded rod till the head of the measuring rod makes contact with the top of a rotor. At the moment, micrometer data are read through the scale marks; if the turbine support bearing is abraded in the operation process, the radial position of the rotor sinks, the reading of the micrometer is increased, and the abrasion loss of the turbine support bearing can be obtained by subtracting the initial measurement value of the micrometer from the initial measurement value of the micrometer. The method is suitable for detecting the turbine support bearing.

Description

Technical Field

[0001] The invention relates to the field of steam turbine maintenance, and in particular to a device for measuring the wear of a steam turbine support bearing. Background Art

[0002] The turbine support bearing is an important component of the turbine. It bears the load of the turbine and ensures the radial alignment of the rotor relative to the stator. Affected by the start and stop of the turbine and the cleanliness of the lubricating oil, the support bearing has different degrees of wear during the operation of the turbine. When the wear reaches a certain level, it affects the bearing temperature, rotor alignment and turbine vibration. In severe cases, it may damage the turbine. Conventional detection of bearing wear requires the removal of the turbine support bearing for measurement, which involves a large project and a long measurement time, delaying the operation of the turbine. Especially in marine steam turbines, due to the small space, operation is very inconvenient.

[0003] In summary, when inspecting the support bearing of a steam turbine, the support bearing needs to be removed from the interior of the steam turbine, which results in a large workload for inspection and thus leads to a problem of low inspection efficiency. Summary of the invention

[0004] The present invention proposes a device for measuring the wear of a turbine support bearing in order to solve the problem that when inspecting a turbine support bearing, the support bearing needs to be removed from the inside of the turbine, resulting in a large workload for inspection and thus low inspection efficiency.

[0005] A steam turbine support bearing wear measurement device of the present invention comprises a micrometer 1 and a micrometer 2, wherein the bottom of the micrometer 1 is threadedly connected to the top of the micrometer 2;

[0006] The micrometer 1 comprises a housing 1-1, a threaded rod 1-2 and a connecting nut 1-3; a countersunk hole is processed at the center of the top surface and the bottom surface of the housing 1-1 respectively, a threaded hole is processed at the center of the inner bottom surface of the countersunk hole on the top surface of the housing 1-1, and the threaded hole connects the upper and lower countersunk holes of the housing 1-1, and the bottom end of the threaded rod 1-2 passes through the countersunk hole on the top surface of the housing 1-1 and is threadedly connected with the threaded hole inside the housing 1-1. A limiting boss is processed at the lower part of the outer surface of the micrometer 1, and a connecting nut 1-3 is sleeved on the outer surface of the limiting boss;

[0007] Furthermore, the diameter of the countersunk hole on the bottom surface of the housing 1-1 is smaller than the diameter of the countersunk hole on the top surface of the housing 1-1;

[0008] Furthermore, the connecting nut 1-3 is rotatably connected to the limiting boss at the lower part of the outer surface of the micrometer 1;

[0009] Further, the micrometer 2 comprises a compression nut 2-1, a spring 2-2, a measuring rod 2-3 and a threaded joint 2-4;

[0010] A countersunk blind hole is processed at the center of the upper surface of the threaded joint 2-4, and a through hole is processed at the center of the lower surface of the threaded joint 2-4. The diameter of the through hole on the lower surface of the threaded joint 2-4 is smaller than the minimum diameter of the countersunk blind hole. A spring 2-2 is arranged inside the countersunk blind hole on the upper surface of the threaded joint 2-4. The inner wall of the countersunk blind hole on the upper surface of the threaded joint 2-4 is processed with an internal thread. A limiting boss is processed on the upper part of the outer surface of the measuring rod 2-3. After the bottom end of the measuring rod 2-3 passes through the spring 2-2 inside the countersunk blind hole on the upper surface of the threaded joint 2-4, a clamping nut 2-1 is sleeved on the top end of the measuring rod 2-3, and the clamping nut 2-1 is threadedly connected to the inner wall of the countersunk blind hole on the upper surface of the threaded joint 2-4.

[0011] Furthermore, the bottom surface of the limiting boss on the measuring rod 2-3 contacts the top end of the spring 2-2;

[0012] Furthermore, the outer surface of the upper limit boss of the measuring rod 2-3 is slidably connected to the inner wall of the minimum diameter section of the countersunk blind hole on the upper surface of the threaded joint 2-4;

[0013] Further, the connecting nut 1-3 at the bottom of the micrometer 1 is threadedly connected to the top of the threaded connector 2-4 of the micrometer 2;

[0014] Furthermore, a positioning boss is processed on the lower portion of the outer surface of the threaded joint 2-4;

[0015] Furthermore, the micrometer 1 and the micrometer 2 are coaxially arranged;

[0016] Furthermore, when in use, the bottom end of the threaded rod 1-2 is passed through the countersunk hole on the top surface of the shell 1-1 and is threadedly connected to the threaded hole inside the shell 1-1. The front part of the shell 1-1 is marked with a scale line, and the range is about 5mm. The range size can also be set according to the thickness of the bearing alloy. The threaded rod 1-2 is connected to the shell 1-1 through a thread, and the connection pitch is 1mm. One rotation of the threaded rod 1-2 is exactly 1mm; the middle part of the threaded rod 1-2 is divided into 100 equal parts in the circumferential direction, and the scale lines are marked, which can improve the measurement accuracy. The micrometer 1 is connected to the micrometer 2 by a threaded connection, and the micrometer 1 is connected to the top of the threaded joint 2-4 of the micrometer 2 by a threaded connection. The micrometer 1 is connected to the top of the threaded joint 2-4 of the micrometer 2 by the connecting nut 1-3. The threaded rod 1-2 is rotated downward to make it connect with the measuring rod 2-3. Under the force of the threaded rod 1-2, the measuring rod 2-3 moves downward until the head of the measuring rod contacts the top of the rotor 4. At this time, the micrometer data is read through the scale line.

[0017] If the turbine support bearing wears during operation, the rotor radial position sinks, and the micrometer reading becomes larger. The wear amount of the turbine support bearing can be obtained by subtracting it from the initial measurement value of micrometer 1. After the measurement is completed, loosen the connecting nut 1-3 and take micrometer 1. The measuring rod 2-3 returns to its original position under the action of the spring 2-2.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention overcomes the shortcomings of the prior art and adopts a connecting nut mainly for connecting the micrometer and the micrometer; the bottom of the threaded joint of the micrometer is fixed to the top of the bearing box cover by a threaded connection, and the micrometer is connected to the top of the threaded joint of the micrometer by the connecting nut, and the threaded rod is rotated downward to make it connect with the measuring rod. Under the action of the threaded rod, the measuring rod moves downward until the head of the measuring rod contacts the top of the rotor, and the micrometer data is read through the scale line at this time; if the turbine support bearing wears during operation and the radial position of the rotor sinks, the micrometer reading will become larger, and the wear amount of the turbine support bearing can be obtained by subtracting it from the initial measurement value of the micrometer; using a measuring device with this mechanism, there is no need to remove the support bearing from the inside of the turbine, thereby realizing direct detection of the support bearing inside the turbine, reducing the workload and improving the detection work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a main cross-sectional view of a device for measuring wear of a steam turbine support bearing according to the present invention;

[0021] Figure 2 It is a main cross-sectional view of a micrometer in a device for measuring wear of a steam turbine support bearing according to the present invention;

[0022] Figure 3 The present invention is a main cross-sectional view of a micrometer in a device for measuring wear of a steam turbine support bearing. DETAILED DESCRIPTION

[0023] Specific implementation method 1: Combination Figure 1 and Figure 2 The present embodiment is described. A steam turbine support bearing wear measurement device described in the present embodiment comprises a micrometer 1 and a micrometer 2. The bottom of the micrometer 1 is threadedly connected to the top of the micrometer 2.

[0024] The micrometer 1 comprises a housing 1-1, a threaded rod 1-2 and a connecting nut 1-3; a countersunk hole is processed at the center of the top surface and the bottom surface of the housing 1-1 respectively, a threaded hole is processed at the center of the inner bottom surface of the countersunk hole on the top surface of the housing 1-1, and the threaded hole connects the upper and lower countersunk holes of the housing 1-1, and the bottom end of the threaded rod 1-2 passes through the countersunk hole on the top surface of the housing 1-1 and is threadedly connected with the threaded hole inside the housing 1-1. A limiting boss is processed at the lower part of the outer surface of the micrometer 1, and a connecting nut 1-3 is sleeved on the outer surface of the limiting boss;

[0025] In this specific implementation mode, when in use, the bottom end of the threaded rod 1-2 is passed through the countersunk hole on the top surface of the shell 1-1 and is threadedly connected to the threaded hole inside the shell 1-1. The front part of the shell 1-1 is marked with a scale line, and the range is about 5mm. The range size can also be set according to the thickness of the bearing alloy. The threaded rod 1-2 is connected to the shell 1-1 through a thread, and the connection pitch is 1mm. One rotation of the threaded rod 1-2 is exactly 1mm; the middle part of the threaded rod 1-2 is divided into 100 equal parts in the circumferential direction, and the scale lines are marked to adjust the measurement accuracy. Raised to 0.001mm; the connecting nut 1-3 is mainly used to connect the micrometer 1 and the micrometer 2; the bottom of the threaded joint 2-4 of the micrometer 2 is fixed to the top of the bearing box cover 3 through a threaded connection, and the micrometer 1 is connected to the top of the threaded joint 2-4 of the micrometer 2 through the connecting nut 1-3, and the threaded rod 1-2 is rotated downward to make it connect with the measuring rod 2-3. Under the force of the threaded rod 1-2, the measuring rod 2-3 moves downward until the head of the measuring rod contacts the top of the rotor 4; at this time, the micrometer data is read through the scale line;

[0026] If the turbine support bearing wears during operation, the rotor radial position sinks, and the micrometer reading becomes larger. The wear amount of the turbine support bearing can be obtained by subtracting it from the initial measurement value of micrometer 1. After the measurement is completed, loosen the connecting nut 1-3 and take micrometer 1. The measuring rod 2-3 returns to its original position under the action of the spring 2-2.

[0027] Specific implementation method 2: Combination Figure 1 and Figure 2 To explain this embodiment, this embodiment is a further limitation of the measuring device described in the specific embodiment 1. In the device for measuring the wear of a turbine support bearing described in this embodiment, the diameter of the countersunk hole on the bottom surface of the shell 1-1 is smaller than the diameter of the countersunk hole on the top surface of the shell 1-1.

[0028] Specific implementation method three: Combination Figure 1 and Figure 2 This embodiment is described as a further limitation of the measuring device described in the specific embodiment 1. This embodiment is a device for measuring the wear of a turbine support bearing, wherein the connecting nut 1-3 is rotatably connected to the limiting boss at the lower part of the outer surface of the micrometer 1.

[0029] Specific implementation method four: Combination Figures 1 to 3 This embodiment is described. This embodiment is a further limitation of the measuring device described in the specific embodiment 1. This embodiment is a steam turbine support bearing wear measurement device. The micrometer 2 includes a clamping nut 2-1, a spring 2-2, a measuring rod 2-3 and a threaded joint 2-4.

[0030] A countersunk blind hole is processed at the center of the upper surface of the threaded joint 2-4, and a through hole is processed at the center of the lower surface of the threaded joint 2-4. The diameter of the through hole on the lower surface of the threaded joint 2-4 is smaller than the minimum diameter of the countersunk blind hole. A spring 2-2 is provided inside the countersunk blind hole on the upper surface of the threaded joint 2-4. The inner wall of the countersunk blind hole on the upper surface of the threaded joint 2-4 is processed with an internal thread. A limiting boss is processed on the upper part of the outer surface of the measuring rod 2-3. After the bottom end of the measuring rod 2-3 passes through the spring 2-2 inside the countersunk blind hole on the upper surface of the threaded joint 2-4, a clamping nut 2-1 is sleeved on the top end of the measuring rod 2-3, and the clamping nut 2-1 is threadedly connected to the inner wall of the countersunk blind hole on the upper surface of the threaded joint 2-4.

[0031] Specific implementation method five: Combination Figures 1 to 3 To explain this embodiment, this embodiment is a further limitation of the measuring device described in the specific embodiment four. In the turbine support bearing wear measuring device described in this embodiment, the bottom surface of the limiting boss on the measuring rod 2-3 contacts the top end of the spring 2-2.

[0032] Specific implementation method six: Combination Figures 1 to 3 To explain this embodiment, this embodiment is a further limitation of the measuring device described in the specific embodiment five. This embodiment describes a turbine support bearing wear measuring device, wherein the outer surface of the upper limit boss of the measuring rod 2-3 is slidably connected to the inner wall of the minimum diameter section of the countersunk blind hole on the upper surface of the threaded joint 2-4.

[0033] Specific implementation method seven: Combination Figures 1 to 3 This embodiment is described as a further limitation of the measuring device described in the fourth embodiment. This embodiment is a device for measuring the wear of a turbine support bearing, wherein the connecting nut 1-3 at the bottom of the micrometer 1 is threadedly connected to the top of the threaded joint 2-4 of the micrometer 2.

[0034] Specific implementation method eight: Combination Figures 1 to 3 This embodiment is described. This embodiment is a further limitation of the measuring device described in the fourth embodiment. In this embodiment, a steam turbine support bearing wear measurement device is described. The lower part of the outer surface of the threaded joint 2-4 is processed with a positioning boss;

[0035] In this specific implementation, a positioning boss is processed on the lower portion of the outer surface of the threaded joint 2-4. When in use, the bottom of the threaded joint 2-4 is fixed to the top of the bearing box cover 3 through a threaded connection, and the positioning boss is used to limit the installation height during measurement.

[0036] Specific implementation method nine: Combination Figures 1 to 3 This embodiment is described as a further limitation of the measuring device described in the first embodiment. This embodiment is a device for measuring the wear of a turbine support bearing, wherein the micrometer 1 and the micrometer 2 are coaxially arranged.

[0037] How it works

[0038] When in use, the bottom end of the threaded rod 1-2 is passed through the countersunk hole on the top surface of the shell 1-1, and then is threadedly connected to the threaded hole inside the shell 1-1. The front of the shell 1-1 is marked with a scale line, and the range is about 5mm. The range size can also be set according to the thickness of the bearing alloy. The threaded rod 1-2 is connected to the shell 1-1 through a thread, and the connection pitch is 1mm. One rotation of the threaded rod 1-2 is exactly 1mm; the middle part of the threaded rod 1-2 is divided into 100 equal parts in the circumferential direction, and the scale line is marked, which can improve the measurement accuracy to 0 .001mm; the connecting nut 1-3 is mainly used to connect the micrometer 1 and the micrometer 2; the bottom of the threaded joint 2-4 of the micrometer 2 is fixed to the top of the bearing box cover 3 through a threaded connection, and the micrometer 1 is connected to the top of the threaded joint 2-4 of the micrometer 2 through the connecting nut 1-3, and the threaded rod 1-2 is rotated downward to make it connect with the measuring rod 2-3. Under the force of the threaded rod 1-2, the measuring rod 2-3 moves downward until the head of the measuring rod contacts the top of the rotor 4; at this time, the micrometer data is read through the scale line;

[0039] If the turbine support bearing wears during operation, the rotor radial position sinks, and the micrometer reading becomes larger. The wear amount of the turbine support bearing can be obtained by subtracting it from the initial measurement value of micrometer 1. After the measurement is completed, loosen the connecting nut 1-3 and take micrometer 1. The measuring rod 2-3 returns to its original position under the action of the spring 2-2.

Claims

1. A device for measuring the wear of a steam turbine support bearing, characterized in that: It comprises a micrometer (1) and a micrometer (2), wherein the bottom of the micrometer (1) is threadedly connected to the top of the micrometer (2); The micrometer (1) comprises a shell (1-1), a threaded rod (1-2) and a connecting nut (1-3); a countersunk hole is processed at the center of the top surface and the bottom surface of the shell (1-1), a threaded hole is processed at the center of the inner bottom surface of the countersunk hole on the top surface of the shell (1-1), and the threaded hole connects the upper and lower countersunk holes of the shell (1-1); the bottom end of the threaded rod (1-2) passes through the countersunk hole on the top surface of the shell (1-1) and is threadedly connected to the threaded hole inside the shell (1-1); a limiting boss is processed at the lower part of the outer surface of the micrometer (1), and a connecting nut (1-3) is sleeved on the outer surface of the limiting boss.

2. A steam turbine support bearing wear measurement device according to claim 1, characterized in that: The diameter of the countersunk hole on the bottom surface of the shell (1-1) is smaller than the diameter of the countersunk hole on the top surface of the shell (1-1).

3. The device for measuring the wear of a steam turbine support bearing according to claim 1, characterized in that: The connecting nut (1-3) is rotatably connected to the limiting boss at the lower part of the outer surface of the micrometer (1).

4. The device for measuring the wear of a steam turbine support bearing according to claim 1, characterized in that: The micrometer (2) comprises a compression nut (2-1), a spring (2-2), a measuring rod (2-3) and a threaded joint (2-4); A countersunk blind hole is processed at the center of the upper surface of the threaded joint (2-4), and a through hole is processed at the center of the lower surface of the threaded joint (2-4). The diameter of the through hole on the lower surface of the threaded joint (2-4) is smaller than the minimum diameter of the countersunk blind hole. A spring (2-2) is arranged inside the countersunk blind hole on the upper surface of the threaded joint (2-4). An internal thread is processed on the inner wall of the countersunk blind hole on the upper surface of the threaded joint (2-4). A limiting boss is processed on the upper part of the outer surface of the measuring rod (2-3). After the bottom end of the measuring rod (2-3) passes through the spring (2-2) inside the countersunk blind hole on the upper surface of the threaded joint (2-4), a clamping nut (2-1) is sleeved on the top end of the measuring rod (2-3), and the clamping nut (2-1) is threadedly connected to the inner wall of the countersunk blind hole on the upper surface of the threaded joint (2-4).

5. A steam turbine support bearing wear measurement device according to claim 4, characterized in that: The bottom surface of the limiting boss on the measuring rod (2-3) contacts the top end of the spring (2-2).

6. A steam turbine support bearing wear measurement device according to claim 5, characterized in that: The outer surface of the upper limit boss of the measuring rod (2-3) is slidably connected to the inner wall of the minimum diameter section of the countersunk blind hole on the upper surface of the threaded joint (2-4).

7. The device for measuring the wear of a steam turbine support bearing according to claim 4, characterized in that: The connecting nut (1-3) at the bottom of the micrometer (1) is threadedly connected to the top of the threaded joint (2-4) of the micrometer (2).

8. The device for measuring the wear of a steam turbine support bearing according to claim 4, characterized in that: A positioning boss is processed on the lower part of the outer surface of the threaded joint (2-4).

9. The device for measuring the wear of a steam turbine support bearing according to claim 1, characterized in that: The micrometer (1) and the micrometer (2) are coaxially arranged.

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