Axial positioning and maintenance auxiliary system for steam turbine rotor

Abstract

The utility model provides a steam turbine rotor axial positioning and maintenance auxiliary system which comprises a steam turbine bearing box, a steam turbine rotor is arranged on the top of the steam turbine bearing box, a positioning plate is arranged on one side of the steam turbine bearing box, and a clamping groove is formed in the positioning plate. According to the axial positioning and overhauling auxiliary system for the steam turbine rotor, the protection plates are arranged on the two sides of the clamping groove, so that the situation that the rotor is damaged due to collision and abrasion is avoided, meanwhile, after the multiple fixing pieces are loosened, the positioning plates are pushed to move towards one side through the telescopic pieces, and the positioning plates are not damaged. The multiple adjusting grooves move towards one side on the surfaces of the multiple fixing pieces correspondingly, so that the position of the positioning plate is conveniently adjusted, meanwhile, the telescopic pieces can support the positioning plate, impact force generated by axial displacement of the steam turbine rotor on the positioning plate is prevented, and the situation that the positioning plate deforms or displaces due to too large impact force is generally avoided. And the measurement result is greatly influenced.

Description

Technical Field

[0001] The utility model relates to the field of steam turbine rotors, in particular to an axial positioning and maintenance auxiliary system for steam turbine rotors. Background Art

[0002] With the continuous pursuit of turbine maintenance efficiency and safety, the development and application of turbine rotor axial positioning and maintenance auxiliary systems are increasing. In the traditional turbine maintenance process, due to the disassembly of the wheel and thrust pad during maintenance, the rotor axial displacement is difficult to control, which affects the accuracy of the measurement data and also brings hidden dangers to the safe and stable startup and operation of the unit. Therefore, the rotor axial positioning during the turbine maintenance process has become a technical problem. In order to solve this problem, engineering and technical personnel have developed some turbine body maintenance rotor axial positioning devices. This type of device can limit the axial displacement of the rotor to a certain extent during the maintenance process and ensure the smooth progress of the maintenance work.

[0003] Due to the high requirements for the structure and precision of the axial positioning device of the turbine rotor, there are many shortcomings. For example, the current axial positioning device of the turbine rotor has the following defects: the material hardness of the contact part between the positioning device and the rotor is high, which scratches the rotor surface. At the same time, adjusting the position of the positioning device requires completely removing all bolts, which increases the burden on the staff.

[0004] Therefore, it is necessary to provide a steam turbine rotor axial positioning and maintenance auxiliary system to solve the above technical problems. Utility Model Content

[0005] The utility model provides a steam turbine rotor axial positioning and maintenance auxiliary system, which solves the problem that the contact part between the positioning device and the rotor is made of high hardness material, which scratches the rotor surface and makes it inconvenient to adjust the position of the positioning device.

[0006] In order to solve the above technical problems, the utility model provides a steam turbine rotor axial positioning and maintenance auxiliary system, comprising:

[0007] A steam turbine bearing box, wherein a steam turbine rotor is arranged on the top of the steam turbine bearing box;

[0008] A positioning plate, the positioning plate is arranged on one side of the turbine bearing box, a card slot is opened inside the positioning plate, and protective plates are fixedly connected to both sides of the inner wall of the card slot, a plurality of adjustment slots are opened inside the positioning plate, and a telescopic member is provided on one side of the positioning plate;

[0009] A plurality of gaskets are respectively arranged on one side of the plurality of adjustment slots, and fixing members are arranged inside the plurality of gaskets.

[0010] Preferably, a support frame is fixedly connected to one side of the turbine bearing box, and two rotating rods are rotatably connected inside the support frame.

[0011] Preferably, a limiting plate is provided on the surface of the positioning plate, and two rotation grooves are provided inside the limiting plate.

[0012] Preferably, a plurality of limiting grooves are provided inside the limiting plate, and the interiors of the plurality of limiting grooves are all slidably connected to limiting blocks.

[0013] Preferably, the plurality of limit blocks are all fixedly connected to one side of the positioning plate.

[0014] Preferably, a positioning groove is provided inside the two rotating rods, and a positioning pin is slidably connected inside the two positioning grooves.

[0015] Preferably, one end of each of the two positioning pins is fixedly connected to a positioning block, and the positioning block is made of rubber material.

[0016] Compared with related technologies, the steam turbine rotor axial positioning and maintenance auxiliary system provided by the present invention has the following beneficial effects:

[0017] The utility model provides a steam turbine rotor axial positioning and maintenance auxiliary system, which is provided with protective plates on both sides of the slot, thereby avoiding damage to the rotor due to friction. At the same time, after loosening a plurality of fixing parts, the positioning plate is pushed to one side by the telescopic part, and a plurality of adjustment slots are respectively moved to one side on the surface of the plurality of fixing parts, thereby facilitating the adjustment of the position of the positioning plate. At the same time, the telescopic part can provide support for the positioning plate, thereby preventing the impact force generated by the axial displacement of the steam turbine rotor on the positioning plate. Usually, the positioning plate will be deformed or displaced due to excessive impact force, which will have a great influence on the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a first embodiment of a steam turbine rotor axial positioning and maintenance auxiliary system provided by the utility model;

[0019] Figure 2 for Figure 1 The structural diagram of the positioning plate shown;

[0020] Figure 3 for Figure 1 An enlarged schematic diagram of part A is shown;

[0021] Figure 4 This is a structural schematic diagram of a second embodiment of a steam turbine rotor axial positioning and maintenance auxiliary system provided by the utility model;

[0022] Figure 5for Figure 4 The structural diagram of the limiting plate shown;

[0023] Figure 6 for Figure 4 An enlarged schematic diagram of part B is shown;

[0024] Figure 7 for Figure 4 An enlarged schematic diagram of part C is shown.

[0025] Numbers in the figure: 1. Box body, 2. Positioning plate, 3. Protective plate, 4. Slot, 5. Adjustment slot, 6. Gasket, 7. Fixing part, 8. Telescopic part, 9. Turbine rotor, 10. Support frame, 11. Limiting plate, 12. Limiting slot, 13. Limiting block, 14. Rotating rod, 15. Rotating slot, 16. Positioning slot, 17. Positioning pin, 18. Positioning block. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0027] First embodiment

[0028] Please refer to Figure 1 、 Figure 2 and Figure 3 ,in, Figure 1 This is a structural schematic diagram of a first embodiment of a steam turbine rotor axial positioning and maintenance auxiliary system provided by the utility model; Figure 2 for Figure 1 The structural diagram of the positioning plate shown; Figure 3 for Figure 1 An enlarged schematic diagram of part A is shown. A steam turbine rotor axial positioning and maintenance auxiliary system includes:

[0029] A steam turbine bearing box 1, wherein a steam turbine rotor 9 is provided on the top of the steam turbine bearing box 1;

[0030] A positioning plate 2 is provided on one side of the turbine bearing housing 1. A slot 4 is provided inside the positioning plate 2. Protective plates 3 are fixedly connected to both sides of the inner wall of the slot 4. A plurality of adjustment slots 5 are provided inside the positioning plate 2. A telescopic member 8 is provided on one side of the positioning plate 2.

[0031] A plurality of gaskets 6 are respectively arranged on one side of the plurality of adjustment slots 5 , and a fixing piece 7 is arranged inside each of the plurality of gaskets 6 .

[0032] The positioning plate 2 is made of 30mm thick ordinary carbon structural steel plate, with a length of 370mm and a width of 440mm, and a length / width ratio of 0.84. Smooth transitions are used at all shape mutations to avoid stress concentration, so that the entire axial positioning bracket has sufficient strength and rigidity to withstand the impact force of the turbine rotor when a small amount of axial displacement occurs.

[0033] Positioning plate 2 and box Figure 1 A rubber gasket is set between them to prevent the positioning steel plates from sliding.

[0034] The protective plate 3 is made of brass with low hardness, which avoids damage to the rotor due to friction.

[0035] The telescopic member 8 is a hydraulic jack, and the hydraulic jack has a self-locking function and can control the movement stroke by adjusting the pressure of the hydraulic system. It has a compact structure, high efficiency and strong environmental adaptability.

[0036] The fixing part 7 is a bolt, and a threaded hole compatible with the bolt is opened inside the turbine bearing box 1, which is used to limit the positioning plate 2 after the bolt is installed inside the threaded hole. The bolt is a stud bolt and nut of equal length. The material, structural form and mechanical properties can meet the use requirements and can provide sufficient fastening force for the positioning steel plate.

[0037] The working principle of the steam turbine rotor axial positioning and maintenance auxiliary system provided by the utility model is as follows:

[0038] During use, when the positioning plate 2 needs to be adjusted, after loosening the multiple fixing parts 7, the positioning plate 2 is pushed to one side by the extension and contraction of the telescopic part 8, so that the multiple adjustment slots 5 are moved to the appropriate position on the surface of the multiple fixing parts 7. After resetting the multiple fixing parts 7, the positioning plate 2 can be limited.

[0039] Compared with related technologies, the steam turbine rotor axial positioning and maintenance auxiliary system provided by the present invention has the following beneficial effects:

[0040] The present invention provides a steam turbine rotor axial positioning and maintenance auxiliary system, which is equipped with protective plates 3 on both sides of the card slot 4, thereby avoiding damage to the rotor due to friction. At the same time, after loosening the multiple fixing members 7, the positioning plate 2 is pushed to one side by the telescopic member 8, and the multiple adjustment slots 5 are respectively moved to one side on the surface of the multiple fixing members 7, so as to facilitate the adjustment of the position of the positioning plate 2. At the same time, the telescopic member 8 can provide support for the positioning plate 2, thereby preventing the axial displacement of the steam turbine rotor 9 from generating an impact force on the positioning plate 2. Usually, the positioning plate 2 will be deformed or displaced due to excessive impact force, which has a great influence on the measurement result.

[0041] Second embodiment

[0042] Please refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 Based on the steam turbine rotor axial positioning and maintenance assistance system provided in the first embodiment of this application, the second embodiment of this application provides another steam turbine rotor axial positioning and maintenance assistance system. The second embodiment is merely a preferred embodiment of the first embodiment, and implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0043] Specifically, the difference of the turbine rotor axial positioning and maintenance auxiliary system provided in the second embodiment of the present application is that, in a turbine rotor axial positioning and maintenance auxiliary system, a support frame 10 is fixedly connected to one side of the turbine bearing box 1, and the internal rotation of the support frame 10 is connected to two rotating rods 14.

[0044] A limiting plate 11 is provided on the surface of the positioning plate 2 , and two rotation grooves 15 are defined inside the limiting plate 11 .

[0045] The rotation groove 15 is used to limit the position between the limiting plate 11 and the support frame 10 after the rotating rod 14 rotates to one side and enters the rotating groove 15 .

[0046] A plurality of limiting grooves 12 are formed inside the limiting plate 11 , and limiting blocks 13 are slidably connected to the interior of the plurality of limiting grooves 12 .

[0047] A plurality of limiting grooves 12 adapted to the limiting blocks 13 are formed inside the limiting plate 11 .

[0048] The plurality of limit blocks 13 are all fixedly connected to one side of the positioning plate 2 .

[0049] A rectangular block is fixedly connected to one side of the positioning plate 2, and the bottoms of multiple limit blocks 13 are fixedly connected to the top of the rectangular block. After the positioning plate 2 is moved to a suitable position to one side, the limit plate 11 is placed on the top of the rectangular block on one side of the positioning plate 2, and multiple limit grooves 12 are respectively mounted on the surfaces of the multiple limit blocks 13 to limit the positioning plate 2.

[0050] A positioning slot 16 is formed inside each of the two rotating rods 14 , and a positioning pin 17 is slidably connected inside each of the two positioning slots 16 .

[0051] Two positioning grooves 16 are defined inside the limiting plate 11 , and are used to limit the position between the rotating rod 14 and the limiting plate 11 after two positioning pins 17 are respectively inserted into the two positioning grooves 16 .

[0052] One end of each of the two positioning pins 17 is fixedly connected to a positioning block 18 , and the positioning block 18 is made of rubber material.

[0053] The positioning block 18 is used to limit the positioning pin 17 by the elastic force of the rubber after the positioning pin 17 is inserted into the positioning groove 16 .

[0054] The working principle of the steam turbine rotor axial positioning and maintenance auxiliary system provided by the utility model is as follows:

[0055] During use, when the position of the positioning plate 2 needs to be adjusted, the two positioning pins 17 are pulled upward, so that they move upward and separate inside the two positioning slots 16, and then the two rotating rods 14 are rotated to one side and separated from the two rotating slots 15.

[0056] After the limiting plate 11 is moved upwards to drive the plurality of limiting grooves 12 to separate from the plurality of limiting blocks 13 , the positioning plate 2 can be pushed to move to one side by the telescopic member 8 .

[0057] When the positioning plate 2 is moved to one side to the appropriate position, the limit plate 11 is placed on the surface of the positioning plate 2, and the multiple limit grooves 12 are respectively placed on the surfaces of the multiple limit blocks 13. Then, the two rotating rods 14 are rotated to one side and reset to the appropriate positions inside the two rotating grooves 15 respectively, and then the two positioning pins 17 are respectively inserted into the inside of the two positioning grooves 16.

[0058] Compared with related technologies, the steam turbine rotor axial positioning and maintenance auxiliary system provided by the present invention has the following beneficial effects:

[0059] The utility model provides a steam turbine rotor axial positioning and maintenance auxiliary system, which limits the positioning plate 2 by placing the limiting plate 11 on the top of multiple limiting blocks 13 on one side of the positioning plate 2, rotating the two rotating rods 14 to one side to a suitable position, and installing the two positioning pins 17, thereby facilitating and quickly disassembling and installing the positioning plate 2.

[0060] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steam turbine rotor axial positioning and maintenance auxiliary system, characterized in that: include: A steam turbine bearing box, wherein a steam turbine rotor is arranged on the top of the steam turbine bearing box; A positioning plate, the positioning plate is arranged on one side of the turbine bearing box, a card slot is opened inside the positioning plate, and protective plates are fixedly connected to both sides of the inner wall of the card slot, a plurality of adjustment slots are opened inside the positioning plate, and a telescopic member is provided on one side of the positioning plate; A plurality of gaskets are respectively arranged on one side of the plurality of adjustment slots, and fixing members are arranged inside the plurality of gaskets.

2. A steam turbine rotor axial positioning and maintenance auxiliary system according to claim 1, characterized in that: A support frame is fixedly connected to one side of the turbine bearing box, and two rotating rods are rotatably connected inside the support frame.

3. The steam turbine rotor axial positioning and maintenance auxiliary system according to claim 1, characterized in that: A limiting plate is provided on the surface of the positioning plate, and two rotation grooves are provided inside the limiting plate.

4. A steam turbine rotor axial positioning and maintenance auxiliary system according to claim 3, characterized in that: A plurality of limiting grooves are provided inside the limiting plate, and the interiors of the plurality of limiting grooves are all slidably connected to the limiting blocks.

5. A steam turbine rotor axial positioning and maintenance auxiliary system according to claim 4, characterized in that: The plurality of limit blocks are all fixedly connected to one side of the positioning plate.

6. The steam turbine rotor axial positioning and maintenance auxiliary system according to claim 2, characterized in that: A positioning groove is provided inside the two rotating rods, and a positioning pin is slidably connected inside the two positioning grooves.

7. A steam turbine rotor axial positioning and maintenance auxiliary system according to claim 6, characterized in that: One end of each of the two positioning pins is fixedly connected to a positioning block, and the positioning block is made of rubber material.

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