Steam turbine shafting centering tool

Abstract

The utility model discloses a steam turbine shafting centering tool which comprises a rod body, an expansion sleeve, a pressing plate, an L-shaped clamp, a radial dial indicator, an axial dial indicator and a limiting device. The rod body comprises a screw rod, a connecting rod and a conical head which are fixedly connected in sequence; the screw rod is fixedly connected with the vertical section of the L-shaped fixture, the vertical section of the L-shaped fixture is provided with an axial dial gauge, the horizontal end of the L-shaped fixture is provided with a radial dial gauge and a limiting device, and the limiting device is parallel to the radial dial gauge; the outer wall of the conical head is movably sleeved with an expansion sleeve, a threaded hole is formed in the end, away from the connecting rod, of the conical head, a fastening bolt is screwed into the threaded hole, and a pressing plate is clamped between the fastening bolt and the expansion sleeve. The expansion sleeve comprises a plurality of expansion blocks matched with the conical head, and the expansion blocks are arranged in the circumferential direction of the conical head at equal intervals and are in sliding fit with the outer wall of the conical head.

Description

Technical Field

[0001] This utility model relates to the technical field of steam turbine equipment, specifically to a tooling for centering steam turbine shaft systems. Background Technology

[0002] Alignment of the turbine generator set shaft system is an extremely important step in the installation and maintenance of the unit. It is a crucial and meticulous task. Inaccurate measurement of the alignment data can lead to misalignment, which can cause problems such as excessive load on some bearings, wear of bearing bearings, increased lubricating oil temperature, and forced vibration of the shaft system, thus affecting the safe and stable operation of the unit.

[0003] In the past, when power plants were aligning the shaft system of steam turbine generator sets, a special device for aligning couplings, as disclosed in existing patent (publication number CN 219551350 U), included: a dial indicator support frame and a limiting plate mounted on a lead screw assembly; the lead screw assembly included: a lead screw, a through-hole cone, and a hollow copper cylinder, the through-hole cone being welded to one end of the lead screw, and the hollow copper cylinder consisting of two hollow semi-cylinders that could be joined together to enclose the through-hole cone; the dial indicator support frame included: a radial metal plate and an axial metal plate, the radial and axial metal plates being welded together perpendicularly; and the limiting plate was a hollow disc with a boss.

[0004] The existing technical problems are as follows: 1. In order to ensure the stability of the device, the inner wall of the hollow copper cylinder needs to fit with the outer wall of the through-hole cone. Since the models of couplings are different, and in order to ensure the balancing of the coupling, manual enlargement of the hole is required. Therefore, multiple models of hollow copper cylinders need to be made to meet the actual measurement requirements. 2. During the measurement process, the driving end half coupling needs to be rotated and the value is measured by dial indicator. If the centers of the driving end half coupling and the driven end half coupling are not aligned and the deviation is large, the position of the deviation cannot be known in time. It can only be known whether there is a deviation after the measurement is completed, based on the dial indicator. At the same time, when the dial indicator is abnormal, the measurement value will be inaccurate. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling for centering a steam turbine shaft system.

[0006] This utility model is implemented by the following technical solution: a turbine shaft alignment tooling, which includes a rod, an expansion sleeve, a pressure plate, an L-shaped clamp, a radial dial indicator, an axial dial indicator, and a limiting device;

[0007] The rod body includes a screw, a connecting rod, and a conical head that are fixedly connected in sequence;

[0008] The screw is fixedly connected to the vertical section of the L-shaped clamp. The vertical section of the L-shaped clamp is provided with the axial dial indicator. The horizontal end of the L-shaped clamp is provided with the radial dial indicator and the limiting device. The limiting device is arranged parallel to the radial dial indicator.

[0009] The outer wall of the conical head is movably fitted with the expansion sleeve, and a threaded hole is opened at the end of the conical head away from the connecting rod. A fastening bolt is screwed into the threaded hole, and the pressure plate is clamped between the fastening bolt and the expansion sleeve.

[0010] The expansion sleeve includes multiple expansion blocks that match the conical head. The multiple expansion blocks are arranged at equal intervals along the circumference of the conical head and slide in contact with the outer wall of the conical head.

[0011] Furthermore, the vertical section of the L-shaped clamp has a first mounting groove that slides through the screw, and a fastening nut is screwed onto the screw on the outside of the L-shaped clamp. The L-shaped clamp is clamped and fixed between the connecting rod and the fastening nut.

[0012] Furthermore, a wedge-shaped slider is fixed to the inner wall of the expansion block, and a groove matching the wedge-shaped slider is opened on the outer wall of the conical head, with the wedge-shaped slider movably installed inside the groove.

[0013] Furthermore, the bracket is fixed to the horizontal section of the L-shaped clamp, and the displacement sensor is vertically arranged between the bracket and the L-shaped clamp.

[0014] Furthermore, the pressure plate includes a body and a boss. The body has a boss that corresponds to the expansion block on the side near the expansion sleeve. The body and the boss are integrally formed.

[0015] Advantages of this utility model: The expansion sleeve includes multiple expansion blocks, and the contact position between the expansion blocks and the conical head can be adjusted according to the diameter of the mounting hole of the active end half coupling. By rotating the fastening bolt, the conical head and the expansion sleeve are tightened to achieve a tight fit, filling the entire mounting hole of the active end half coupling and meeting the requirements of different mounting hole diameters of the active end half coupling. Due to the special structure of the conical head, fastening bolt and expansion sleeve, the connection is tighter and more secure, ensuring stability during the measurement process and reducing the phenomenon of measurement inaccuracy caused by the shaking of the active end half coupling.

[0016] The limit device can be used to promptly detect the deviation position and upload the real-time detection results to the display screen for easy reading. It also helps the dial indicator find the maximum and minimum values. By adjusting the bearing shims and pads, the driving end half coupling and the driven end half coupling are aligned. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the rod structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the expansion sleeve and the rod body of this utility model.

[0021] Figure 4 This is a schematic diagram of the combined structure of the expansion sleeve and the conical head of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the expansion block of this utility model;

[0023] In the diagram: 1. Rod body, 1.1. Screw, 1.2. Connecting rod, 1.3. Conical head, 1.3.1. Radial dial indicator, 2. Axial dial indicator, 3. Limiting device, 4. Displacement sensor, 4.1. Bracket, 4.2. Expansion sleeve, 5. Expansion block, 5.1. Wedge slider, 5.1.1. Threaded hole, 6. Fastening bolt, 7. Pressure plate, 8. Body, 8.1. Boss, 8.2. Driving end half coupling, 9. Mounting hole, 9.1. L-shaped clamp, 10. First mounting groove, 10.1. Fastening nut, 11. Driven end half coupling, 12. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-5 As shown, the turbine shaft alignment tooling includes a rod 1, an expansion sleeve 5, a pressure plate 8, an L-shaped clamp 10, a radial dial indicator 2, an axial dial indicator 3, and a limiting device 4.

[0026] The rod body 1 includes a screw 1.1, a connecting rod 1.2, and a tapered head 1.3 that are fixedly connected in sequence;

[0027] The screw 1.1 is fixedly connected to the vertical section of the L-shaped clamp 10. The vertical section of the L-shaped clamp 10 is equipped with an axial dial indicator 3. The horizontal end of the L-shaped clamp 10 is equipped with a radial dial indicator 2 and a limiting device 4. The limiting device 4 is set parallel to the radial dial indicator 2. The limiting device 4 can trigger an alarm in time according to the deviation, so as to facilitate the knowledge of the deviation position. The limiting device 4 is electrically connected to the alarm, triggering the alarm in time, assisting the radial dial indicator 2, and ensuring accurate measurement.

[0028] An expansion sleeve 5 is movably fitted onto the outer wall of the conical head 1.3. A threaded hole 6 is provided at the end of the conical head 1.3 away from the connecting rod 1.2. A fastening bolt 7 is screwed into the threaded hole 6. A pressure plate 8 is clamped between the fastening bolt 7 and the expansion sleeve 5. The pressure plate 8 includes a body 8.1 and a boss 8.2. The body 8.1 is fixed with a boss 8.2 that corresponds one-to-one with the expansion block 5.1 on the side near the expansion sleeve 5. The body 8.1 and the boss 8.2 are integrally formed. The boss 8.2 can be inserted into the mounting hole 9.1 of the active end half coupling 9, so that the applicable active end of the device can be... The mounting hole 9.1 of the half-coupling 9 has a larger diameter range. By rotating the fastening bolt 7, the tapered head 1.3 and the expansion sleeve 5 are tightened to achieve a tight fit. During the rotation of the fastening bolt 7, the pressure plate 8 restricts the displacement of the expansion block 5.1, so that the tapered head 1.3 and the expansion sleeve 5 fill the entire mounting hole 9.1 of the active end half-coupling 9, which meets the requirements of different mounting hole diameters of the active end half-coupling 9.1, making the connection tighter and more secure, ensuring the stability during the measurement process, and reducing the phenomenon of measurement inaccuracy caused by the shaking of the active end half-coupling.

[0029] The expansion sleeve 5 includes multiple expansion blocks 5.1 that match the conical head 1.3. The multiple expansion blocks 5.1 are evenly spaced along the circumference of the conical head 1.3 and slide in contact with the outer wall of the conical head 1.3. The contact position between the expansion blocks 5.1 and the conical head 1.3 can be adjusted according to the diameter of the mounting hole 9.1 of the drive end half coupling 9. With the cooperation of the expansion sleeve 5 and the conical head 1.3, the entire mounting hole 9.1 of the drive end half coupling 9 is filled, which can meet the use of different mounting hole 9.1 diameters of the drive end half coupling 9.

[0030] The vertical section of the L-shaped clamp 10 has a first mounting groove 10.1 that slides through the screw 1.1. The screw 1.1 on the outside of the L-shaped clamp 10 is screwed with a fastening nut 11. The L-shaped clamp 10 is clamped and fixed between the connecting rod 1.2 and the fastening nut 11.

[0031] The inner wall of the expansion block 5.1 is fixed with a wedge-shaped slider 5.1.1, and the outer wall of the conical head 1.3 is provided with a groove 1.3.1 that matches the wedge-shaped slider 5.1.1. The wedge-shaped slider 5.1.1 is movably installed inside the groove 1.3.1. The cooperation between the wedge-shaped slider 5.1.1 and the groove 1.3.1 facilitates the limiting of the expansion block 5.1.

[0032] The limiting device includes a displacement sensor 4.1 and a bracket 4.2. The bracket is fixed to the horizontal section of the L-shaped clamp, and the displacement sensor is vertically mounted between the bracket and the L-shaped clamp.

[0033] A bracket 4.2 is fixed to the horizontal section of the L-shaped clamp 10. A vertically installed displacement sensor 4.1 is fixed between the bracket 4.2 and the L-shaped clamp 10. The displacement sensor 4.1 is a differential transformer type displacement sensor, and its sensing end passes through the L-shaped clamp 10. The displacement sensor 4.1 assists the radial dial indicator 2 in measurement. In some special measurement positions, when the dial indicator is inconvenient to read or the reading angle is biased, the differential transformer type displacement sensor is used to upload the real-time detection results to the display screen for easy reading. It also assists the dial indicator in finding the maximum and minimum values. By adjusting the bearing shims and washers, the driving end half-coupling 9 and the driven end half-coupling 12 are aligned.

[0034] The specific operation process of this embodiment is as follows:

[0035] First, the screw 1.1 end of rod 1 is passed through the active end half coupling 9 and the driven end half coupling 12 in sequence. According to the hole diameter of the mounting hole 9.1 of the active end half coupling 9, the contact position of the expansion sleeve 5 and the tapered head 1.3 is adjusted to meet the hole diameter requirements. Through the cooperation of the fastening nut 11, the pressure plate 8 and the expansion sleeve 5, the tapered head 1.3 is connected to the active end half coupling 9. Due to the special structure of the tapered head 1.3 and the expansion sleeve 5, the connection is tighter and more secure, ensuring the stability during the measurement process.

[0036] The L-shaped clamp 10 is fixed at the end of the screw 1.1 by the fastening nut 11. The axial dial indicator 3 and radial dial indicator 2 on the L-shaped clamp 10 are in contact with the outer wall of the driven end half coupling 12. The position of the driven end half coupling 12 is adjusted according to the deviation measured by the dial indicator.

[0037] In some special measurement positions, when the dial indicator is inconvenient to read or the reading angle is biased, a differential transformer displacement sensor is used to upload the real-time detection results to the display screen for easy reading and to help the dial indicator find the maximum and minimum values. Later, based on the found maximum and minimum values, the operator adjusts the bearing shims and pads to align the driving end half coupling 9 and the driven end half coupling 12.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centering tool for a turbine shaft, characterized in that, It include lever body, expansion sleeve, pressing plate, L-shaped fixture, radial dial gauge, axial dial gauge, limiting device; The lever body includes a screw rod, a connecting rod and a conical head which are sequentially fixedly connected; The screw rod is fixedly connected with the vertical section of the L-shaped fixture, the vertical section of the L-shaped fixture is provided with the axial dial gauge, the horizontal end of the L-shaped fixture is provided with the radial dial gauge and the limiting device, the limiting device is arranged in parallel with the radial dial gauge; The outer wall of the conical head movably sleeves the expansion sleeve, a threaded hole is formed in the end of the conical head away from the connecting rod, a fastening bolt is screwed in the threaded hole, and the pressing plate is clamped between the fastening bolt and the expansion sleeve; The expansion sleeve includes a plurality of expansion blocks matched with the conical head, the plurality of expansion blocks are equidistantly arranged along the circumferential direction of the conical head and are in sliding fit with the outer wall of the conical head.

2. The steam turbine shafting centering tool of claim 1, wherein, The vertical section of the L-shaped fixture is provided with a first installation slot through which the screw rod slides, the screw rod outside the L-shaped fixture is screwed with a fastening nut, and the L-shaped fixture is clamped and fixed between the connecting rod and the fastening nut.

3. The steam turbine shafting centering tool of claim 2, wherein, The inner wall of the expansion block is fixed with a wedge-shaped sliding block, the outer wall of the conical head is provided with a sliding groove matched with the wedge-shaped sliding block, and the wedge-shaped sliding block is movably installed in the sliding groove.

4. The steam turbine shafting centering tool of claim 3, wherein, The limiting device includes a displacement sensor and a bracket, the horizontal section of the L-shaped fixture is fixed with the bracket, and the bracket and the L-shaped fixture are fixed with the vertically arranged displacement sensor therebetween.

5. The steam turbine shafting centring tool of claim 4, wherein, The pressing plate includes a body and a boss, the body is fixed with a boss corresponding to each expansion block on the side close to the expansion sleeve, and the body and the boss are integrally formed.

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