Special lifting ring for turning of hydroelectric generating set

Abstract

A special lifting ring for a turning gear of a hydroelectric generating set comprises a fixed disc, a rotating disc and a ring buckle, the fixed disc is connected with the lower end face of the rotating disc through a rotating shaft, the rotating disc and the fixed disc are coaxial and can freely rotate around the axis of the rotating disc, the upper end face of the rotating disc is connected with the ring buckle through a connecting base, and a pressure sensing device is arranged on the ring buckle. According to the utility model, not only can turning and hoisting work be taken into consideration, but also tension and torsion can be monitored in the working process, and the safety during hoisting and turning is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of water turbine maintenance tools, in particular to a special lifting ring for a turning gear of a water power generator set. Background Art

[0002] The turning of a hydroelectric generator set is an important installation, commissioning or maintenance operation. Its purpose is to use external force to slowly rotate the rotating parts of the unit during the installation or overhaul of the hydroelectric generator set, and then accurately measure the radial and axial swing of the unit's main shaft at each bearing position to ensure that its swing value meets the design specifications and operating requirements, reflect the straightness of the unit's axis, check whether the air gap between the rotor and the stator is uniform, and whether there are any abnormal conditions such as foreign matter stuck, dynamic and static friction, etc.

[0003] The core components of a hydroelectric generator set, such as rotors and stators, are large in size and extremely heavy, and are often located in a closed pit, which places extremely high demands on the safety and accuracy of the lifting operation. During the turning process, a reliable lifting device is needed to support and move these components. Traditional lifting rings can only lift the main shaft and cannot take into account the turning work; they also need to withstand huge loads without plastic deformation or fracture to ensure safety during the lifting and turning process. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a special lifting ring for the turning of a hydroelectric generator set, which can not only take into account the turning and hoisting work, but also monitor the tension and torque during the working process, effectively improving the safety during hoisting and turning.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A special lifting ring for a hydroelectric generator set comprises a fixed plate, a rotating plate and a ring buckle. The fixed plate is connected to the lower end surface of the rotating plate through a rotating shaft. The rotating plate is coaxial with the fixed plate and can rotate freely around its own axis. The upper end surface of the rotating plate is connected to the ring buckle through a connecting base. A pressure sensor is arranged on the ring buckle.

[0007] In a preferred solution, threaded holes are correspondingly provided on the fixed disk and the rotating disk, and the connecting bolts pass through the threaded holes to connect and fix the rotating disk and the fixed disk.

[0008] In a preferred embodiment, the pressure sensing device comprises a first pressure sensing sheet, which is arranged on the top surface of the inner side of the buckle, and the first pressure sensing sheet is in contact with the suspension cable and monitors the tension provided by the suspension cable.

[0009] In a preferred embodiment, the pressure sensing device includes a second pressure sensing sheet, which is arranged on the side surface of the inner side of the buckle, and the second pressure sensing sheet is in contact with the torsion bar and monitors the torsion provided by the torsion bar.

[0010] A special lifting ring for a hydroelectric generator set, the structure has the following beneficial effects:

[0011] 1. This device can not only hoist dependent parts, but also cooperate with the torsion bar to slowly rotate the rotating parts of the unit, combining the hoisting and turning devices into one, reducing the investment in tools;

[0012] 2. By setting a pressure sensor on the ring, this device can monitor the tension on the ring during lifting and the torque on the ring during turning, preventing the ring from bearing huge loads without plastic deformation or fracture, ensuring safety during lifting and turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model during hoisting;

[0015] Figure 2 It is an enlarged schematic diagram of the buckle structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the utility model when turning the car

[0018] In the figure: a fixed disk 1, a rotating disk 2, a connecting base 3, a buckle 4, a rotating shaft 5, a connecting bolt 6, a suspension cable 7, a first pressure sensing sheet 8, a second pressure sensing sheet 9, a torsion bar 10, and a threaded hole 11. DETAILED DESCRIPTION

[0019] like Figure 1 and Figure 4 As shown, a special lifting ring for a hydroelectric generator set turning gear includes a fixed plate 1, a rotating plate 2 and a buckle 4. The fixed plate 1 is connected to the lower end surface of the rotating plate 2 through a rotating shaft 5. The rotating plate 2 is coaxial with the fixed plate 1 and can rotate freely around its own axis. The upper end surface of the rotating plate 2 is connected to the buckle 4 through a connecting base 3. The buckle 4 is provided with a pressure sensor.

[0020] The fixed plate 1 is fixedly connected to the rotating parts of the hydro-generator set (such as the turbine rotor, the generator rotor, etc.). When the hoisting cable 7 is inserted into the ring buckle 4, the ring buckle 4 plays a role in lifting and receiving. When the torsion bar 10 is inserted into the ring buckle 4, the ring buckle 4 plays a role in applying the turning torque.

[0021] The preferred solution is Figure 3 As shown, threaded holes 11 are correspondingly opened on the fixed disk 1 and the rotating disk 2, and the connecting bolts 6 pass through the threaded holes 11 to connect and fix the rotating disk 2 and the fixed disk 1;

[0022] When lifting work is performed, the connecting bolt 6 is unscrewed from the threaded hole 11. At this time, since the rotating disk 2 can rotate freely, it is convenient to adjust the rope threading angle and the torque during lifting and prevent the lifting cable 7 from winding. When the turning work is performed, the connecting bolt 6 is screwed into the threaded hole 11. At this time, the fixed disk 1 and the rotating disk 2 remain fixed, and the torque between the fixed disk 1 and the rotating disk 2 is dispersed to the multiple connecting bolts 6. The fixed disk 1 can be further rotated by twisting the buckle 4, thereby turning the rotating parts of the hydro-turbine generator set.

[0023] The preferred solution is Figure 2 As shown, the pressure sensing device includes a first pressure sensing plate 8, which is arranged on the top surface of the inner side of the buckle 4. The first pressure sensing plate 8 is in contact with the suspension cable 7 and monitors the tension provided by the suspension cable 7. The first pressure sensing plate 8 can monitor the lifting tension in real time to prevent lifting overload and reduce safety risks during the lifting process.

[0024] The preferred solution is Figure 2 As shown, the pressure sensing device includes a second pressure sensing sheet 9, which is arranged on the side surface inside the buckle 4. The second pressure sensing sheet 9 is in contact with the torsion bar 10 and monitors the torque provided by the torsion bar 10. The second pressure sensing sheet 9 can monitor the turning torque in real time to prevent the turning torque and reduce the safety risk during the turning process.

Claims

1. A special lifting ring for a hydroelectric generator set, comprising a fixed plate (1), a rotating plate (2) and a ring buckle (4), characterized in that: The fixed disk (1) is connected to the lower end surface of the rotating disk (2) via a rotating shaft (5); the rotating disk (2) is coaxial with the fixed disk (1) and can rotate freely around its own axis; the upper end surface of the rotating disk (2) is connected to a buckle (4) via a connecting base (3); and a pressure sensor device is provided on the buckle (4).

2. The special lifting ring for the turning gear of a hydroelectric generator set according to claim 1 is characterized in that: The fixed disk (1) and the rotating disk (2) are provided with threaded holes (11) correspondingly, and the connecting bolts (6) are passed through the threaded holes (11) to connect and fix the rotating disk (2) and the fixed disk (1).

3. The special lifting ring for the turning gear of a hydroelectric generator set according to claim 1 is characterized in that: The pressure sensing device comprises a first pressure sensing sheet (8), wherein the first pressure sensing sheet (8) is arranged on the top surface of the inner side of the ring buckle (4), and the first pressure sensing sheet (8) is in contact with the suspension cable (7) and monitors the tension provided by the suspension cable (7).

4. The special lifting ring for the turning gear of a hydroelectric generator set according to claim 1 is characterized in that: The pressure sensing device comprises a second pressure sensing sheet (9), wherein the second pressure sensing sheet (9) is arranged on the side surface inside the buckle (4), and the second pressure sensing sheet (9) is in contact with the torsion bar (10) and monitors the torsion provided by the torsion bar (10).

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