Guide bearing supporting structure of vertical hydro-generator

Abstract

The utility model belongs to the technical field of vertical hydro-generators, and discloses a vertical hydro-generator guide bearing supporting structure which comprises a guide bearing seat, a plurality of guide bearing bushes distributed in a circular ring shape are installed on the guide bearing seat, a connecting seat is arranged on the outer sides of the guide bearing bushes, the connecting seat is connected with an anti-weight bolt, and the anti-weight bolt is connected with the guide bearing bushes. The anti-weight bolt is movably connected with an anti-loosening assembly, the anti-loosening assembly comprises a fixed cylinder arranged on the guide bearing seat, a movable plate is arranged in the fixed cylinder, the side, close to the guide bearing bush, of the movable plate is fixedly connected with an extending rod, and the anti-loosening assembly can effectively prevent the anti-weight bolt from rotating. A series of safety problems caused by looseness of the bolt are avoided, safe and stable operation of a unit is ensured, the possibility of looseness of the bolt can be greatly reduced, and the number of times of checking and fastening the bolt is reduced, so that the overhaul frequency is reduced, and the power generation loss and the maintenance cost caused by shutdown overhaul are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of vertical hydro-generators, specifically a guide bearing support structure for a vertical hydro-generator. Background Technology

[0002] Vertical turbine generators are a common type of hydropower equipment, mainly composed of stator, rotor, bearings, frame, cooling system, etc. They are widely used in various hydropower stations, especially in hydropower stations with high head and low flow. They have advantages such as compact structure, small footprint, and stable operation, and can adapt to different head and flow conditions to provide a stable power supply for the power system.

[0003] The guide bearing support structure of a vertical hydro generator is a key part to ensure the stable operation of the unit. It mainly undertakes important functions such as supporting the rotor, limiting the displacement of its radial guide bearing pads, and maintaining the uniformity of the air gap between the stator and rotor. It is mainly composed of guide bearing housing, anti-weight bolt assembly, guide bearing pads, etc.

[0004] As the capacity of vertical hydro-generator units continues to increase, their guide bearing support structures need to withstand greater radial loads and dynamic stresses. As key connecting components of the support structure, the reliability of the anti-weight bolts directly affects the safe operation of the unit. In actual operating conditions, the vibrations, impacts, and thermal expansion and contraction caused by temperature changes during hydro-generator operation can easily lead to loosening of the anti-weight bolts. Once the anti-weight bolts loosen, it can cause changes in the clearance of the guide bearing pads, increased unit vibration, and even serious failures such as shaft instability.

[0005] Therefore, a guide bearing support structure for a vertical hydro-generator is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background section, this utility model provides a vertical hydro-generator guide bearing support structure, which has the advantage of preventing the anti-weight bolts from loosening.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vertical hydro-generator guide bearing support structure, including a guide bearing seat, on which a plurality of guide bearing pads distributed in a circular pattern are installed, a connecting seat is provided on the outer side of the guide bearing pads, the connecting seat is connected to an anti-weight bolt, and the anti-weight bolt is movably connected to an anti-loosening component;

[0008] The anti-loosening component includes a fixed cylinder mounted on the guide bearing seat, a movable plate inside the fixed cylinder, an extension rod fixedly connected to the side of the movable plate near the guide bearing bearing pad, the end of the extension rod penetrating the fixed cylinder, an extension groove corresponding to the extension rod being formed on the bolt head of the anti-weight bolt, a uniformly distributed serrated groove being formed on the inner wall of the extension groove, and serrations matching the serrated groove being formed on the outer wall of the extension rod, a pull rod fixedly connected to the side of the movable plate away from the extension rod, a pull block being fixedly connected to the end of the pull rod penetrating the fixed cylinder, and a return spring being sleeved on the pull rod inside the fixed cylinder.

[0009] Preferably, a limiting ring is installed on the guide bearing housing, and the limiting ring is located on the outer side of the guide bearing bearing shell.

[0010] Preferably, a threaded groove is provided on the connecting seat at a position corresponding to the anti-weight bolt, and the threaded groove is threadedly connected to the anti-weight bolt.

[0011] Preferably, a fixing seat is provided on the limiting ring at the position corresponding to the anti-weight bolt, and the screw of the anti-weight bolt passes through and is rotatably connected to the fixing seat.

[0012] Preferably, an oil seal is provided between adjacent guide bearing shells.

[0013] Preferably, the outer surface of the pull block is provided with staggered anti-slip textures.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. By setting up an anti-loosening component, this utility model can effectively prevent the anti-weight bolts from rotating, avoid a series of safety problems caused by bolt loosening, ensure the safe and stable operation of the unit, and greatly reduce the possibility of bolt loosening, reduce the number of times the bolts are inspected and tightened, thereby reducing the maintenance frequency and reducing the power generation loss and maintenance costs caused by shutdown maintenance.

[0016] 2. This utility model, by setting up a sawtooth groove, sawtooth, spring, pulling block and other structures, allows the sawtooth to disengage from the sawtooth groove by pulling the pulling block, so as to rotate the anti-weight bolt and adjust the gap of the tile. When the pulling block is released, the sawtooth can be inserted into the sawtooth groove, so as to achieve the purpose of preventing the anti-weight bolt from loosening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the external structure of the guide bearing shell, anti-weight bolt and anti-loosening component of this utility model;

[0019] Figure 3This is a schematic diagram of the connection structure of the guide bearing shell and anti-weight bolt of this utility model;

[0020] Figure 4 This is a cross-sectional view of the fixing cylinder of this utility model;

[0021] Figure 5 This is a schematic diagram of the saw teeth and saw tooth grooves of this utility model.

[0022] In the diagram: 1. Guide bearing housing; 2. Guide bearing shell; 3. Connecting seat; 4. Anti-weight bolt;

[0023] 5. Anti-loosening component; 51. Fixed cylinder; 52. Movable plate; 53. Insertion rod; 54. Insertion groove; 55. Serrated groove; 56. Serrated teeth; 57. Pull rod; 58. Pull block; 59. Return spring;

[0024] 6. Limiting ring; 7. Threaded groove; 8. Fixing seat; 9. Oil seal strip. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 5 As shown, this utility model provides a vertical hydro generator guide bearing support structure, including a guide bearing seat 1, a plurality of guide bearing pads 2 arranged in a circular shape are installed on the guide bearing seat 1, a connecting seat 3 is provided on the outer side of the guide bearing pads 2, the connecting seat 3 is connected to an anti-weight bolt 4, and the anti-weight bolt 4 is movably connected to an anti-loosening component 5.

[0027] The anti-loosening component 5 includes a fixed cylinder 51 mounted on the guide bearing seat 1. A movable plate 52 is installed inside the fixed cylinder 51. An extension rod 53 is fixedly connected to the side of the movable plate 52 closest to the guide bearing bearing 2. The end of the extension rod 53 passes through the fixed cylinder 51. An extension groove 54 corresponding to the extension rod 53 is provided on the bolt head of the anti-weight bolt 4. Evenly distributed serrated grooves 55 are provided on the inner wall of the extension groove 54. Serrations 56 matching the serrated grooves 55 are provided on the outer wall of the extension rod 53. A pulling rod 57 is fixedly connected to the side of the movable plate 52 away from the extension rod 53. A pulling block 58 is fixedly connected to the end of the pulling rod 57 passing through the fixed cylinder 51. A return spring 59 is fitted on the pull rod 57 inside the fixed cylinder 51, which can effectively prevent the anti-weight bolt 4 from rotating, avoid a series of safety problems caused by bolt loosening, ensure the safe and stable operation of the unit, and greatly reduce the possibility of bolt loosening, reduce the number of times the bolt is inspected and tightened, thereby reducing the maintenance frequency and reducing the power generation loss and maintenance costs caused by shutdown maintenance. By pulling the pull block 58, the saw teeth 56 can be disengaged from the saw tooth groove 55, so that the anti-weight bolt 4 can be rotated to adjust the bearing gap. When the pull block 58 is released, the saw teeth 56 can be inserted into the saw tooth groove 55, achieving the purpose of preventing the anti-weight bolt 4 from loosening.

[0028] Specifically, a limiting ring 6 is installed on the guide bearing housing 1, and the limiting ring 6 is located on the outside of the guide bearing pad 2.

[0029] Furthermore, a threaded groove 7 is provided on the connecting seat 3 at the position corresponding to the anti-weight bolt 4, and the threaded groove 7 is threadedly connected to the anti-weight bolt 4.

[0030] Furthermore, a fixing seat 8 is provided on the limiting ring 6 at the position corresponding to the anti-weight bolt 4, and the screw of the anti-weight bolt 4 passes through and is rotatably connected to the fixing seat 8.

[0031] It is worth noting that an oil seal strip 9 is provided between adjacent guide bearing shells 2 to prevent lubricating oil leakage.

[0032] It is worth noting that the outer surface of the pull block 58 is provided with staggered anti-slip textures to facilitate pulling the pull block 58.

[0033] Working principle and process: Under normal conditions, under the action of the return spring 59 of the anti-loosening component 5, the extension rod 53 extends into the extension groove 54, and the serration 56 is in the serration groove 55, which can prevent the anti-weight bolt 4 from rotating and avoid loosening of the anti-weight bolt 4. When it is necessary to adjust the gap between the guide bearing pads 2 through the anti-loosening bolt 4, the pulling block 58 of the anti-loosening component 5 is pulled, which in turn pulls the rod 57 to drive the movable plate 52 and the extension rod 53 to move and compress the return spring 59. After the extension rod 53 leaves the extension groove 54, the serration 56 also leaves the serration groove 55, so the anti-weight bolt 4 can be rotated to adjust the gap between the guide bearing pads 2. The anti-loosening component 5 can effectively prevent the anti-weight bolt 4 from rotating, avoid a series of safety problems caused by bolt loosening, ensure the safe and stable operation of the unit, and greatly reduce the possibility of bolt loosening, reduce the number of bolt inspections and tightenings, thereby reducing the maintenance frequency and reducing the power generation loss and maintenance costs caused by shutdown maintenance.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A guide bearing support structure for a vertical hydro-generator, comprising a guide bearing housing (1), characterized in that: The guide bearing seat (1) is equipped with a plurality of guide bearing pads (2) arranged in a circular shape. A connecting seat (3) is provided on the outer side of the guide bearing pad (2). The connecting seat (3) is connected to an anti-weight bolt (4). The anti-weight bolt (4) is movably connected to an anti-loosening component (5). The anti-loosening component (5) includes a fixed cylinder (51) disposed on the guide bearing seat (1). A movable plate (52) is disposed inside the fixed cylinder (51). An extension rod (53) is fixedly connected to the side of the movable plate (52) near the guide bearing pad (2). The end of the extension rod (53) passes through the fixed cylinder (51). An extension groove (54) corresponding to the extension rod (53) is provided on the bolt head of the anti-weight bolt (4). A serrated groove (55) is provided on the inner wall of the extension groove (54). A serrated groove (56) matching the serrated groove (55) is provided on the outer wall of the extension rod (53). A pulling rod (57) is fixedly connected to the side of the movable plate (52) away from the extension rod (53). A pulling block (58) is fixedly connected to the end of the pulling rod (57) passing through the fixed cylinder (51). A return spring (59) is sleeved on the pulling rod (57) inside the fixed cylinder (51).

2. The guide bearing support structure for a vertical hydro-generator according to claim 1, characterized in that: A limiting ring (6) is installed on the guide bearing seat (1), and the limiting ring (6) is located on the outside of the guide bearing pad (2).

3. The guide bearing support structure for a vertical hydro-generator according to claim 1, characterized in that: A threaded groove (7) is provided on the connecting seat (3) at a position corresponding to the anti-weight bolt (4), and the threaded groove (7) is threadedly connected to the anti-weight bolt (4).

4. The guide bearing support structure for a vertical hydro-generator according to claim 2, characterized in that: A fixing seat (8) is provided on the limiting ring (6) at the position corresponding to the anti-weight bolt (4), and the screw of the anti-weight bolt (4) passes through and is rotatably connected to the fixing seat (8).

5. The guide bearing support structure for a vertical hydro-generator according to claim 1, characterized in that: An oil seal strip (9) is provided between adjacent guide bearing shells (2).

6. The guide bearing support structure for a vertical hydro-generator according to claim 1, characterized in that: The outer surface of the pull block (58) is provided with staggered anti-slip textures.

Images