Dismounting tool for guide vane middle shaft sleeve of water-turbine generator set

Abstract

The utility model provides a water-turbine generator set guide vane middle shaft sleeve dismounting tool which comprises an adapter ring, a through hole allowing a screw to penetrate through is formed in the adapter ring, the screw penetrates through the through hole and then is installed in a middle shaft sleeve sealing pressing plate installation hole in a guide vane middle shaft sleeve, the adapter ring is connected with a plurality of connecting rods, and jacking plates are arranged at the upper ends of the connecting rods. A jack is arranged below the jacking plate and placed on the upper end face of the guide vane shaft neck. The tool is used for disassembling the guide vane middle shaft sleeve and facilitates unit maintenance operation.

Description

Technical Field

[0001] The utility model relates to the field of maintenance of a water turbine generator set, in particular to a tool for disassembling a shaft sleeve in a guide vane of a water turbine generator set. Background Art

[0002] The turbine generator set of a hydropower station needs to be overhauled every 10 to 15 years. During the overhaul, the top cover needs to be lifted out. Before lifting the top cover out, it is usually necessary to remove all the movable guide vane center sleeves to prevent the movable guide vane center sleeves from locking the movable guide vane shaft neck during the lifting of the top cover, thereby affecting the lifting of the top cover and thus affecting the maintenance of the unit; the turbine generator set needs routine maintenance every 1 to 2 years. If abnormal conditions such as excessive guide vane operating torque are found before maintenance, it may be necessary to remove the guide vane center sleeve and inspect the center bearing. The position relationship of each component in the maintenance area is as follows: Figure 1 As shown in the figure, the top cover is installed on the seat ring (not marked in the figure), the movable guide vane passes through the middle shaft hole and the upper shaft hole of the top cover, the middle shaft sleeve of the movable guide vane is installed on the top cover, and the sealing pressure plate of the middle shaft sleeve of the movable guide vane is installed on the middle shaft sleeve. When the unit is overhauled, the sealing pressure plate must be removed first, and then the middle shaft sleeve must be removed, and then the top cover must be lifted out.

[0003] Based on the above reasons, it is necessary to design a hydraulic turbine generator set guide vane middle shaft sleeve removal tool for removing the guide vane middle shaft sleeve to facilitate unit maintenance operations. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a tool for disassembling the guide vane middle shaft sleeve of a water turbine generator set, which is used for disassembling the guide vane middle shaft sleeve and is convenient for the maintenance of the set.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a tool for removing the guide vane middle shaft sleeve of a hydro-turbine generator set, including an adapter ring, the adapter ring is provided with a through hole for screws to pass through, the screws are installed in the middle shaft sleeve sealing pressure plate mounting hole on the guide vane middle shaft sleeve after passing through the through hole, the adapter ring is connected to a plurality of connecting rods, a lifting plate is provided at the upper end of the connecting rod, a jack is provided under the lifting plate, and the jack is placed on the upper end surface of the guide vane shaft neck.

[0006] In a preferred embodiment, the connecting rod includes an upper screw rod section, a bare rod section and a lower screw rod section. The adapter ring is provided with a threaded hole that cooperates with the lower screw rod section. The lifting plate is provided with a lifting plate through hole for the connecting rod to pass through. The upper screw rod section is threadedly connected with a nut, and the nut is arranged on the upper side of the lifting plate.

[0007] In a preferred solution, a gasket is provided between the nut and the lifting plate.

[0008] In a preferred solution, a connecting rod hanging hole is provided at the upper end of the connecting rod.

[0009] In a preferred solution, the jacking plate includes an upper jacking plate and a lower jacking plate, which are connected by bolts. The upper jacking plate is provided with bolt through holes for the bolts to pass through, and the lower jacking plate is provided with connecting threaded holes that cooperate with the bolts.

[0010] In a preferred solution, a lifting hole is provided on the upper lifting plate.

[0011] The utility model provides a tool for removing the shaft sleeve of a guide vane of a hydro-turbine generator set, which has the following beneficial effects:

[0012] 1. The tool can be disassembled and used in a small working environment for routine maintenance; it can also be used in combination to avoid repeated assembly and improve work efficiency when the unit is overhauled.

[0013] 2. This tool can be used to evenly distribute the force applied to the guide vane center sleeve during disassembly to a whole circle of pressure plate bolt holes, thereby optimizing the force and avoiding damage to the pressure plate bolt holes.

[0014] 3. The load-bearing capacity of each part of the tool is greatly enhanced, and the force is transmitted through a special connecting rod, which can cope with situations where it is difficult to disassemble the center sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 This is the position relationship diagram of each component in the maintenance area;

[0017] Figure 2 This is a schematic diagram of the overall installation structure of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the adapter ring;

[0019] Figure 4 is a structural schematic diagram of a connecting rod;

[0020] Figure 5 is a structural schematic diagram of the upper top plate;

[0021] Figure 6 is a structural schematic diagram of the lower top plate;

[0022] In the figure: adapter ring 1, screw 2, connecting rod 3, lifting plate 4, jack 5, guide vane center shaft sleeve 6, guide vane shaft neck upper end face 7, through hole 101, threaded hole 102, upper screw rod section 301, bare rod section 302, lower screw rod section 303, nut 304, gasket 305, connecting rod hanging hole 306, lifting plate through hole 401, upper lifting plate 402, lower lifting plate 403, bolt 404, bolt through hole 405, connecting threaded hole 406, hanging hole 407. DETAILED DESCRIPTION

[0023] like Figures 2 to 6 As shown, a tool for removing the guide vane middle sleeve of a hydro-turbine generator set includes an adapter ring 1. The adapter ring 1 is an integrated hollow circular ring, which is mainly used to transfer the bearing point of the guide vane middle sleeve 6 to the adapter ring 1. Its outer diameter should be smaller than the inner diameter of the guide vane upper sleeve mounting hole on the top cover, so that it can be conveniently passed through the guide vane upper sleeve mounting hole on the top cover and installed on the guide vane middle sleeve 6. The adapter ring 1 is provided with a through hole 101 for the screw 2 to pass through. The pitch circle of the through hole 101 is consistent with the middle sleeve sealing plate mounting hole, so that the adapter ring 1 can be installed by using the middle sleeve sealing plate mounting hole existing on the guide vane middle sleeve 6. The screw 2 passes through the through hole and is installed in the middle sleeve sealing plate mounting hole on the guide vane middle sleeve 6, so that the adapter ring 1 and the guide vane middle sleeve 6 are connected as a whole.

[0024] The adapter ring 1 is connected to a plurality of connecting rods 3, the connecting rods 3 are used to transmit force, a jacking plate 4 is provided at the upper end of the connecting rod 3, a jack 5 is provided below the jacking plate 4, and the jack 5 is placed on the upper end surface 7 of the guide vane journal. The adapter ring 2 can be fixedly connected to the connecting rod 3, and the connecting rod 3 is fixedly connected to the jacking plate 4.

[0025] Preferably, in this embodiment, the connecting rod 3 includes an upper screw segment 301, a bare rod segment 302 and a lower screw segment 303, a threaded hole 102 cooperating with the lower screw segment 303 is provided on the adapter ring 1, the lower screw segment 303 is used to connect with the adapter ring 1, and a lifting plate through hole 401 is provided on the lifting plate 4 for the connecting rod 3 to pass through, the upper screw segment 301 is threadedly connected with the nut 304, the nut 304 is arranged on the upper side of the lifting plate 4, and a gasket 305 is provided between the nut 304 and the lifting plate 4.

[0026] The connecting rod 3 structure realizes the detachable connection between the connecting rod 3 and the adapter ring 1 and the connecting rod 3 and the lifting plate 4, and is conducive to the replacement of the jack. When the guide vane center shaft sleeve 6 is pushed upward, each time the hydraulic jack is replaced, it is only necessary to rotate the screw 304 downward, which facilitates the replacement of the jack.

[0027] Furthermore, a connecting rod lifting hole 306 is provided at the upper end of the connecting rod 3, and the connecting rod lifting hole 306 is mainly used for lifting.

[0028] Preferably, the jacking plate 4 includes an upper jacking plate 402 and a lower jacking plate 403, and the upper jacking plate 402 and the lower jacking plate 403 are connected by bolts 404. The upper jacking plate 402 is provided with a bolt through hole 405 for the bolt 404 to pass through, and the lower jacking plate 403 is provided with a connecting threaded hole 406 that cooperates with the bolt 404. Four groups of connecting threaded holes 406 are arranged. Each time they are used, any two symmetrical ones can be selected as hanging points; or any two symmetrical ones can be selected as connection points with the upper jacking plate 402.

[0029] The lower lifting plate 402 is provided to improve the force-bearing strength of the lifting plate 4 .

[0030] The upper lifting plate 402 is provided with hanging holes 407, and the hanging holes 407 are in two groups, symmetrically along the center of the upper lifting plate 402. In specific use, the hanging holes 407 and the bolt through holes 405 are symmetrically distributed on the same pitch circle, and the pitch circle diameter is consistent with the connecting threaded holes 406 on the lower lifting plate 403 to improve versatility.

[0031] Implementation method 1:

[0032] When using for the first time or during routine maintenance of the unit, assemble the various parts of this tool on site to remove the guide vane center sleeve.

[0033] Construction preparation: The crank arm and upper sleeve have been removed, the middle sleeve sealing pressure plate and middle sleeve seal have been removed, and the bolts connecting the middle sleeve and the top cover have been removed.

[0034] S1: Clean the upper end surface of the guide vane shaft sleeve 6 to remove foreign matter, insert the adapter ring 1 from the upper part of the movable guide vane, and make it fall steadily on the guide vane shaft sleeve 6; connect the adapter ring 1 with the guide vane shaft sleeve 6 with screws 2 to form a whole;

[0035] S2: Install the lower screw rod sections 303 of the four connecting rods 3 on the adapter rings 1 respectively, with the sections facing downwards;

[0036] S3: placing the jack 5 at the center of the upper end surface 7 of the guide vane journal;

[0037] S4: The upper lifting plate 402 and the lower lifting plate 403 are connected into a whole by bolts 404 (hereinafter referred to as the whole as the lifting plate);

[0038] S5: Use a bridge crane or a waterwheel room circular crane to turn the lower jacking plate 403 downward, so that it falls steadily on the jack 5, and the through holes 401 of the jacking plate are accurately and completely inserted into the connecting rods 3;

[0039] S6: Screw the washer 305 and the nut 304 into the connecting rod 3, screw all four nuts 304 to the bottom, fit them with the jacking plate 4, and ensure that the jacking plate 4 is as horizontal as possible;

[0040] S7: Use the jack 5 to lift the lifting plate 4, and the guide vane middle sleeve 6 will also be lifted up under the action of the disassembly tool;

[0041] S8: After the jack 5 reaches the working stroke, the pressure is released. At this time, the lifting plate 4 will fall together with the piston of the jack 5; the nut 304 is screwed down to the bottom;

[0042] S9: Repeat S7 and S8 until the guide vane middle shaft sleeve 6 can fall down by its own weight or be completely ejected, and the disassembly is completed.

[0043] S10: Remove the screws 2 between the adapter ring 1 and the guide vane middle sleeve 6.

[0044] Implementation method 2:

[0045] This is not the first time to use the guide vane middle sleeve removal tool. The guide vane middle sleeve removal tool has been assembled. Place the jack 5 at the center of the upper end face 7 of the other guide vane shaft neck; use a bridge crane to lift the guide vane middle sleeve removal tool as a whole to the other guide vane middle sleeve operation position, align the through hole 101 of the adapter ring 1 with the sealing pressure plate mounting hole on the guide vane middle sleeve, use screws 2 to connect the guide vane middle sleeve removal tool as a whole to the guide vane middle sleeve 3, and repeat S6-S10 in the first implementation method.

[0046] Implementation method three:

[0047] When it is determined that the force required for removing the guide vane sleeve is not particularly large, the lower lifting plate 403 may not be connected to the upper lifting plate 402, and only the upper lifting plate 402 is used as the lifting plate.

[0048] The tool can be disassembled for use in a narrow working environment for routine maintenance; it can also be used in combination to avoid repeated assembly during unit overhaul and improve work efficiency. The tool can evenly distribute the force applied to the guide vane center sleeve during disassembly to a whole circle of the pressure plate bolt holes, optimize the force, and avoid straining the pressure plate bolt holes. The bearing capacity of each part of the tool is greatly enhanced, and the force is transmitted through a special connecting rod, which can cope with situations where it is difficult to disassemble the center sleeve.

Claims

1. A tool for removing the guide vane sleeve of a hydro-turbine generator set, characterized in that: The adapter ring (1) comprises a through hole (101) for a screw (2) to pass through, the screw (2) passes through the through hole and is installed in the installation hole of the middle shaft sleeve sealing plate on the guide vane middle shaft sleeve (6), the adapter ring (1) is connected to a plurality of connecting rods (3), the upper end of the connecting rods (3) is provided with a lifting plate (4), the lower end of the lifting plate (4) is provided with a jack (5), and the jack (5) is placed on the upper end surface (7) of the guide vane shaft neck.

2. A tool for removing the guide vane sleeve of a hydro-turbine generator set according to claim 1, characterized in that: The connecting rod (3) comprises an upper screw rod section (301), a bare rod section (302) and a lower screw rod section (303); a threaded hole (102) cooperating with the lower screw rod section (303) is provided on the adapter ring (1); a lifting plate through hole (401) for the connecting rod (3) to pass through is provided on the lifting plate (4); the upper screw rod section (301) is threadedly connected to a nut (304); and the nut (304) is arranged on the upper side of the lifting plate (4).

3. A tool for removing the guide vane sleeve of a hydro-turbine generator set according to claim 2, characterized in that: A gasket (305) is provided between the nut (304) and the lifting plate (4).

4. A tool for removing the guide vane sleeve of a hydro-turbine generator set according to claim 1, characterized in that: The upper end of the connecting rod (3) is provided with a connecting rod hanging hole (306).

5. A tool for removing the guide vane sleeve of a hydro-turbine generator set according to claim 1, characterized in that: The jacking plate (4) comprises an upper jacking plate (402) and a lower jacking plate (403), the upper jacking plate (402) and the lower jacking plate (403) being connected via bolts (404), the upper jacking plate (402) being provided with bolt through holes (405) for the bolts (404) to pass through, and the lower jacking plate (403) being provided with connecting threaded holes (406) cooperating with the bolts (404).

6. A tool for removing the guide vane sleeve of a hydro-turbine generator set according to claim 5, characterized in that: The upper lifting plate (402) is provided with a lifting hole (407).

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