Device and method for centering steam turbine partition plate

Abstract

The invention provides a steam turbine partition plate centering device and method.The steam turbine partition plate centering device comprises a fixing plate, a steel wire adjusting frame, a steel wire, a dial indicator, an inner diameter micrometer, a power source and a monitoring earphone, and the steel wire is located at the axis of a cylinder by adjusting a jackscrew and a horizontal adjusting mechanism of the fixing plate; measuring point positions are marked at the left end, the right end and the bottom of the pit of each stage of partition plate respectively; a user wears the monitoring earphone and holds the internal diameter micrometer to measure the internal diameters of the three measuring points of each level of partition plate, when a measuring head of the internal diameter micrometer makes slight contact with the steel wire, a current loop forms a path, the monitoring earphone has slight intermittent current noise, and the reading of the internal diameter micrometer is the accurate distance from the measuring points to the steel wire at the moment. And recording. The turbine partition plate is centered through the method, measured data are more accurate, installation is easy, operation is convenient, tools are convenient to store, and cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbines, and in particular to a device and method for centering a steam turbine diaphragm. Background Art

[0002] The current methods for finding the center of steam turbine partitions at home and abroad generally use the dummy shaft method, the steel wire method or the infrared method. The dummy shaft method requires a specific dummy shaft, which requires space for storage when not in use, and needs to maintain a specific ambient temperature and humidity, etc. It also requires regular special maintenance such as turning, and is difficult to hoist. Although the infrared method is convenient for measurement and accurate through computer calculations, it is generally expensive and users need professional training. The steel wire method is a method for finding the center of partitions commonly used at home and abroad today, but there are difficulties in finding the center of the steel wire and it is not easy to fix it. The installed steel wire is prone to deviation during the measurement process due to its metal properties, resulting in inaccurate measurement data. Summary of the Invention

[0003] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a device and method for centering a steam turbine diaphragm, which improves measurement accuracy, is easy to install and operate, and facilitates easy storage of tools, thereby reducing costs.

[0004] In one aspect, an embodiment of the present invention provides a device for centering a turbine partition, comprising: a fixed plate, a wire adjustment frame, a steel wire, a dial indicator, an inside micrometer, a power supply and monitoring headphones, wherein the fixed plate is fixedly connected to the upper end faces of the cylinder shaft seals at both ends of the cylinder, and top screws are symmetrically connected to the two sides of the fixed plate. The top screws pass through the fixed plate in the vertical direction, and the vertical positions of both sides of the fixed plate are adjusted by rotating the top screws. The adjusted fixed plate is fixedly connected to the cylinder shaft seal by bolts.

[0005] The steel wire adjustment frame is fixedly connected to the middle position of each fixed plate. The steel wire adjustment frame is connected to a horizontal adjustment mechanism, which moves horizontally along the radial direction of the cylinder shaft seal.

[0006] The steel wire is wound around the horizontal adjustment mechanism at the cylinder shaft seal at both ends of the cylinder near the two ends. The two ends of the steel wire are respectively connected to steel pendants and droop naturally. The horizontal adjustment mechanism adjusts the horizontal position of the steel wire.

[0007] The dial indicator is installed on each fixed plate, and the probe of the dial indicator is in contact with the horizontal adjustment mechanism. The pointing direction of the probe of the dial indicator is perpendicular to the axis of the cylinder. The position of the steel wire is adjusted by the dial indicators at the two cylinder shaft seals to ensure that the steel wire is at the axis of the cylinder.

[0008] An insulating piece is detachably connected to the bottom of the inside micrometer, and a probe of the inside micrometer abuts against the steel wire in a direction perpendicular to the steel wire.

[0009] Either the positive electrode or the negative electrode of the power supply is electrically connected to the fixed plate through an electric wire, and the other of the positive electrode or the negative electrode is electrically connected to the inside micrometer through an electric wire. The fixed plate, the steel wire adjustment frame and the horizontal adjustment mechanism are all made of metal. The power supply, the fixed plate, the steel wire adjustment frame, the horizontal adjustment mechanism, the steel wire and the inside micrometer form a current loop.

[0010] The plug of the monitoring earphone is electrically connected to the micrometer to monitor the current noise transmitted from the current loop.

[0011] In some embodiments, the middle portion of the fixing plate has a downward groove, and the wire adjustment frame is fixedly connected in the groove.

[0012] In some embodiments, the dial indicator is fixedly connected to the groove of the fixing plate via a dial indicator bracket.

[0013] In some embodiments, the wire adjustment frame is a U-shaped structure, including a bottom plate and two side plates, and the bottom plate is fixedly connected between the two side plates.

[0014] In some embodiments, the horizontal adjustment mechanism includes an adjusting bolt, a locking cap and an adjusting sleeve. The adjusting bolt passes through the two side plates of the wire adjustment frame in the horizontal direction. After the adjusting bolt is adjusted, it is tightened by the locking cap. The adjusting sleeve is arranged in the middle of the adjusting bolt, the steel wire is wrapped around the adjusting sleeve, and the probe of the dial indicator is against the top of the adjusting bolt.

[0015] In some embodiments, the insulating member is made of rubber and has a flat structure. The insulating member is connected to the bottom of the inside micrometer via threads.

[0016] In some embodiments, the side of the inside micrometer has a conductive jack, and the plug of the monitoring headphone can be plugged in and electrically connected to the conductive jack.

[0017] In some embodiments, the output voltage of the power supply is 12V.

[0018] Another embodiment of the present invention provides a method for centering a steam turbine diaphragm, using the above-mentioned steam turbine diaphragm centering device, including the following steps:

[0019] By adjusting the top screw of the fixed plate and the horizontal adjustment mechanism, make the steel wire located at the axis of the cylinder, and mark the measuring points at the left end, right end and bottom of the depression of each level of the partition respectively;

[0020] Connect the monitoring headphones, power supply, fixing plate and internal micrometer. Wear the monitoring headphones and hold the internal micrometer to measure the internal diameter of the three measuring points on each level of the partition.

[0021] When measuring, place the bottom of the inside micrometer against the measuring point of the partition, with the probe of the inside micrometer facing the steel wire. When the probe of the inside micrometer does not contact the steel wire, the current circuit is open and there is no current noise in the monitoring earphone; slightly shake the inside micrometer and adjust the knob of the inside micrometer until the probe of the inside micrometer lightly contacts the steel wire. The current circuit forms a path and there is a slight intermittent current noise in the monitoring earphone. At this time, the reading of the inside micrometer is the accurate distance from the measuring point to the steel wire, which is recorded; when the contact area between the probe of the inside micrometer and the steel wire is large, so that the steel wire is pushed open, the current noise in the monitoring earphone is strong and harsh. At this time, the reading of the inside micrometer is too large and is not recorded; determine whether the center of the partition is aligned with the center of the cylinder shaft seal through the measured data. If not, adjust the center of the partition based on the measurement data.

[0022] In some embodiments, the measurement points of each level of partition are repeatedly measured, and the measurement data are averaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0024] in:

[0025] Figure 1 This is a schematic diagram of the device for centering a steam turbine diaphragm in an embodiment of the present invention when in use;

[0026] Figure 2 for Figure 1 AA section view in the figure;

[0027] Reference numerals:

[0028] 1. Cylinder shaft seal; 2. Jackscrew; 3. Bolt; 4. Fixing plate; 5. Dial indicator; 6. Steel wire adjustment bracket; 7. Adjusting sleeve; 8. Adjusting bolt; 9. Annular groove; 10. Partition; 11. Depression; 12. Power supply; 13. Insulation; 14. Inside micrometer; 15. Monitoring headphones; 16. Steel wire; 17. Steel pendant; 18. Dial indicator bracket; 19. Locking cap. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] The following describes a device and method for centering a steam turbine diaphragm according to an embodiment of the present invention with reference to the accompanying drawings.

[0031] like Figure 1-2As shown, an embodiment of the present invention provides a device for centering a turbine partition, comprising: a fixed plate 4, a wire adjustment frame 6, a steel wire 16, a dial indicator 5, an inside micrometer 14, a power supply 12 and a monitoring headphone 15. The fixed plate 4 is fixedly connected to the upper end surface of the cylinder shaft seal 1 at both ends of the cylinder, and the two sides of the fixed plate 4 are symmetrically connected to the top screws 2. The top screws 2 pass through the fixed plate 4 in the vertical direction. The vertical position of both sides of the fixed plate 4 is adjusted by rotating the top screws 2. The adjusted fixed plate 4 is fixedly connected to the cylinder shaft seal 1 by bolts 3.

[0032] The wire adjustment frame 6 is fixedly connected to the middle position of each fixed plate 4 . The wire adjustment frame 6 is connected to a horizontal adjustment mechanism, which moves horizontally along the radial direction of the cylinder shaft seal 1 .

[0033] The steel wire 16 is wound around the horizontal adjustment mechanism at the cylinder shaft seal 1 at each end of the cylinder near its ends. Steel weights 17 are connected to each end of the steel wire 16 and allow it to droop naturally. By connecting the steel weights 17 to the ends of the steel wire 16, the steel wire 16 can be tightened to maintain a certain tension. The horizontal adjustment mechanism adjusts the horizontal position of the steel wire 16.

[0034] The dial indicator 5 is installed on each fixed plate 4, and the probe of the dial indicator 5 is in contact with the horizontal adjustment mechanism. The pointing direction of the probe of the dial indicator 5 is perpendicular to the axis of the cylinder. The position of the steel wire 16 is adjusted through the dial indicator 5 at the two cylinder shaft seals 1 to ensure that the steel wire 16 is at the axis of the cylinder.

[0035] The bottom of the inside micrometer 14 is detachably connected to an insulating member 13 , and the probe of the inside micrometer 14 abuts against the steel wire 16 in a direction perpendicular to the steel wire 16 .

[0036] Either the positive pole or the negative pole of the power supply 12 is electrically connected to the fixed plate 4 via an electric wire, and the other of the positive pole or the negative pole is electrically connected to the inside micrometer 14 via an electric wire. The fixed plate 4, the steel wire adjustment frame 6 and the horizontal adjustment mechanism are all made of metal. The power supply 12, the fixed plate 4, the steel wire adjustment frame 6, the horizontal adjustment mechanism, the steel wire 16 and the inside micrometer 14 form a current loop.

[0037] The plug of the monitoring earphone 15 is electrically connected to the micrometer to monitor the current noise transmitted from the current loop.

[0038] The embodiment of the present invention provides a fixing plate 4, a steel wire adjustment frame 6, a steel wire 16, a dial indicator 5, an inside micrometer 14, a power supply 12 and a monitoring headphone 15, so that the measurement data is more accurate, the installation is simple, the operation is convenient, the tools are easy to store, and the cost is reduced.

[0039] Furthermore, the top screw 2 is screwed into and passes through the fixing plate 4 and then abuts against the upper end surface of the cylinder shaft seal 1 .

[0040] Furthermore, the housing of the inside micrometer 14 is made of metal, and the wires and the inside micrometer 14 can be connected by bonding with tape, which makes them conductive.

[0041] In some embodiments, the middle portion of the fixing plate 4 has a downward groove, and the wire adjustment frame 6 is fixedly connected in the groove, so that the upper end surface of the wire 16 is flush with the upper end surface of the cylinder shaft seal 1, thereby ensuring that the wire 16 is at the axis of the cylinder.

[0042] In some embodiments, the dial indicator 5 is fixedly connected to the groove of the fixing plate 4 through the dial indicator bracket 18.

[0043] Furthermore, the dial indicator 5 and the dial indicator bracket 18 are detachably connected, and the detachable connection method can be a conventional connection method such as a bolt connection, a plug-in connection, etc.

[0044] In some embodiments, the wire adjustment frame 6 is in a U-shaped structure, including a bottom plate and two side plates, and the bottom plate is fixedly connected between the two side plates.

[0045] In some embodiments, the horizontal adjustment mechanism includes an adjusting bolt 8, a locking cap 19 and an adjusting sleeve 7. The adjusting bolt 8 passes through the two side plates of the wire adjustment frame 6 in the horizontal direction. After the adjusting bolt 8 is adjusted, it is tightened by the locking cap 19. The adjusting sleeve 7 is arranged on the middle part of the adjusting bolt 8. The steel wire 16 is wrapped around the adjusting sleeve 7, and the probe of the dial indicator 5 is against the top of the adjusting bolt 8.

[0046] By providing a level adjustment mechanism, it is convenient to fine-tune the horizontal direction of the steel wire 16. By providing a dial indicator 5, the horizontal position of the steel wire 16 can be adjusted more accurately to ensure that the steel wire 16 is centered.

[0047] Furthermore, an annular groove 9 for winding the steel wire 16 is provided in the middle of the adjusting sleeve 7 to prevent the position of the steel wire 16 from shifting during the adjustment process. The steel wire 16 is wound in the annular groove 9 for 2 to 3 turns.

[0048] In some embodiments, insulating member 13 is made of rubber and has a flat structure. Insulating member 13 is screwed to the bottom of internal micrometer 14. Providing insulating member 13 prevents short circuits, and screwing insulating member 13 to internal micrometer 14 facilitates assembly and disassembly.

[0049] In some embodiments, the side of the inside micrometer 14 has a conductive socket, and the plug of the monitoring headphone 15 can be plugged and unplugged electrically connected to the conductive socket. This makes it easy to plug and unplug the plug of the monitoring headphone 15, which is convenient for operation.

[0050] Furthermore, the inside micrometer 14 is a digital micrometer and has the function of saving data. After use, it can be connected to a computer via a data cable to transmit and save the measured data to the computer, thereby realizing automatic recording.

[0051] In some embodiments, the output voltage of the power supply 12 is 12 V. This will not cause damage to the human body or equipment.

[0052] like Figure 1-2 As shown, another embodiment of the present invention provides a method for centering a steam turbine diaphragm, using the above-mentioned device for centering a steam turbine diaphragm, including the following steps:

[0053] S1. Adjust the top screw 2 of the fixing plate 4 and the horizontal adjustment mechanism so that the steel wire 16 is located at the axis of the cylinder. Mark the measurement points at the left, right and bottom ends of the dimples 11 of each level of the partition 10.

[0054] S2. Connect the monitoring earphones 15, power supply 12, fixing plate 4 and internal micrometer 14. Wear the monitoring earphones 15 and hold the internal micrometer 14 to measure the internal diameter of the three measuring points of each level of the partition 10.

[0055] S3. When measuring, place the bottom of the inside micrometer 14 close to the measuring point of the partition 10, and the probe of the inside micrometer 14 is facing the steel wire 16. When the probe of the inside micrometer 14 is not in contact with the steel wire 16, the current circuit is open, and there is no current noise in the monitoring earphone 15; slightly shake the inside micrometer 14 and adjust the knob of the inside micrometer 14 until the probe of the inside micrometer 14 is in slight contact with the steel wire 16, the current circuit is open, and a slight intermittent current noise appears in the monitoring earphone 15. At this time, the reading of the inside micrometer 14 is the accurate distance from the measuring point to the steel wire 16, which is recorded; when the contact area between the probe of the inside micrometer 14 and the steel wire 16 is large, so that the steel wire 16 is pushed open, the current noise in the monitoring earphone 15 is strong and harsh. At this time, the reading of the inside micrometer 14 is too large and is not recorded; the measured data is used to determine whether the center of the partition 10 is aligned with the center of the cylinder shaft seal 1. If not, the center of the partition 10 is adjusted in combination with the measured data.

[0056] By using the method of the embodiment of the present invention to find the center of the turbine diaphragm, the measurement data is more accurate, the installation is simple, the operation is convenient, the tool is easy to store, and the cost is reduced.

[0057] In some embodiments, the measurement points of each level of the partition 10 are repeatedly measured and the measurement data are averaged to reduce the measurement error.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for centering a steam turbine diaphragm, characterized in that: include: A fixing plate, the fixing plates being fixedly connected to the upper end surfaces of the cylinder shaft seals at both ends of the cylinder, with top screws symmetrically connected to both sides of the fixing plate. The top screws pass through the fixing plate in a vertical direction, and the vertical positions of both sides of the fixing plate are adjusted by rotating the top screws. After adjustment, the fixing plate is fixedly connected to the cylinder shaft seal by bolts; A steel wire adjustment frame, the steel wire adjustment frame is fixedly connected to the middle position of each fixed plate, the steel wire adjustment frame is connected to a horizontal adjustment mechanism, and the horizontal adjustment mechanism moves horizontally along the radial direction of the cylinder shaft seal; A steel wire, the steel wire being wound around the horizontal adjustment mechanisms at the cylinder shaft seals at both ends of the cylinder at positions near both ends, with steel pendants connected to both ends of the steel wire and drooping naturally, and the horizontal adjustment mechanisms adjusting the horizontal position of the steel wire; A dial indicator is mounted on each of the fixing plates, a probe of the dial indicator abuts against the level adjustment mechanism, and a direction of the probe of the dial indicator is perpendicular to the axis of the cylinder. The position of the steel wire is adjusted by the dial indicators at the two cylinder shaft seals to ensure that the steel wire is at the axis of the cylinder; An inside micrometer, wherein an insulating member is detachably connected to the bottom of the inside micrometer, and a probe of the inside micrometer abuts against the steel wire in a direction perpendicular to the steel wire; a power supply, wherein one of the positive and negative electrodes of the power supply is electrically connected to the fixed plate via a wire, and the other of the positive and negative electrodes is electrically connected to the inside micrometer via a wire, wherein the fixed plate, the steel wire adjustment frame, and the level adjustment mechanism are all made of metal, and the power supply, the fixed plate, the steel wire adjustment frame, the level adjustment mechanism, the steel wire, and the inside micrometer form a current loop; A monitoring earphone, the plug of which is electrically connected to the micrometer, is used to monitor the current noise transmitted from the current loop.

2. The device for centering a steam turbine diaphragm according to claim 1, characterized in that: The middle part of the fixing plate is provided with a downward groove, and the wire adjustment frame is fixedly connected in the groove.

3. The device for centering a steam turbine diaphragm according to claim 2, characterized in that: The dial indicator is fixedly connected to the groove of the fixing plate through a dial indicator bracket.

4. The device for centering a steam turbine diaphragm according to claim 1, characterized in that: The wire adjustment frame is in a U-shaped structure, comprising a bottom plate and two side plates, wherein the bottom plate is fixedly connected between the two side plates.

5. The device for centering a steam turbine diaphragm according to claim 4, characterized in that: The horizontal adjustment mechanism includes an adjusting bolt, a locking cap and an adjusting sleeve. The adjusting bolt passes through the two side plates of the wire adjustment frame in the horizontal direction. The adjusting bolt is tightened by the locking cap after adjustment. The adjusting sleeve is arranged on the middle part of the adjusting bolt. The steel wire is wound on the adjusting sleeve. The probe of the dial indicator abuts against the top end of the adjusting bolt.

6. The device for centering a steam turbine diaphragm according to claim 1, characterized in that: The insulating member is made of rubber and has a flat structure. The insulating member is connected to the bottom of the inside micrometer via threads.

7. The device for centering a steam turbine diaphragm according to claim 1, characterized in that: The side of the inside micrometer is provided with a conductive socket, and the plug of the monitoring earphone is pluggable and electrically connected to the conductive socket.

8. The device for centering a steam turbine diaphragm according to claim 1, characterized in that: The output voltage of the power supply is 12V.

9. A method for centering a steam turbine diaphragm, characterized in that: The device for centering a steam turbine diaphragm according to any one of claims 1 to 8 comprises the following steps: By adjusting the top screw of the fixed plate and the horizontal adjustment mechanism, make the steel wire located at the axis of the cylinder, and mark the measuring points at the left end, right end and bottom of the depression of each level of the partition respectively; Connect the monitoring headphones, power supply, fixing plate and internal diameter micrometer, wear the monitoring headphones, hold the internal diameter micrometer and measure the internal diameter of the three measuring points of each level of the partition respectively; During measurement, the bottom of the inside micrometer is placed close to the measuring point of the partition, and the probe of the inside micrometer is facing the steel wire. When the probe of the inside micrometer is not in contact with the steel wire, the current circuit is open, and there is no current noise in the monitoring earphone; slightly shake the inside micrometer and adjust the knob of the inside micrometer until the probe of the inside micrometer is in light contact with the steel wire, so that the current circuit forms a path, and there is a slight intermittent current noise in the monitoring earphone. At this time, the reading of the inside micrometer is the accurate distance from the measuring point to the steel wire, which is recorded; when the contact area between the probe of the inside micrometer and the steel wire is large, so that the steel wire is pushed away, the current noise in the monitoring earphone is strong and harsh, and the reading of the inside micrometer is too large at this time and is not recorded; determine whether the center of the partition is aligned with the center of the cylinder shaft seal through the measured data. If not, adjust the center of the partition in combination with the measured data.

10. The method for centering a steam turbine diaphragm according to claim 9, characterized in that: The measuring points of each level of the partition are re-measured and the measured data are averaged.

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