Generator guide bearing supporting structure

Abstract

The utility model discloses a generator guide bearing supporting structure, and relates to the technical field of vertical hydroelectric generating set guide bearings, in particular to the generator guide bearing supporting structure, which comprises a guide bearing seat, a wedge plate, a base plate, a joint bearing and a guide bearing bush, and the joint bearing comprises a shaft head and a bearing seat; one side of the wedge plate is a plane, the opposite surface of the wedge plate is a wedge surface, and the plane side of the wedge plate is arranged on the guide bearing seat and can axially slide along the guide bearing seat; the guide bearing bush is provided with a mounting hole, and the knuckle bearing seat is arranged in the mounting hole; the shaft head is connected with a base plate which is connected with the wedge plate, and the connecting face of the base plate and the wedge plate is arranged to be an inclined face corresponding to the wedge face of the wedge plate. The clearance adjusting device has the advantages that clearance adjusting precision and efficiency are improved, bearing capacity and adaptability are enhanced, running friction and energy consumption are reduced, structural stability and safety are improved, installation and maintenance processes are simplified, and lubricating and cooling effects are optimized.

Description

Technical Field

[0001] This utility model relates to the field of vertical hydropower unit guide bearing technology, specifically to a generator guide bearing support structure. Background Technology

[0002] Vertical turbine generator sets are crucial equipment for converting water energy into electrical energy and are widely used in hydropower generation. Their working principle involves water energy driving a turbine to rotate, which in turn drives a generator to convert mechanical energy into electrical energy. The stable operation of a vertical turbine generator set depends on the stability of its shaft system, which is ensured by the guide bearing support structure. As one of the key components of a vertical turbine generator set, the guide bearing primarily bears the radial mechanical imbalance force and electromagnetic imbalance force of the rotating parts of the unit, ensuring stable operation of the main shaft within the bearing clearance range.

[0003] Existing guide bearings for vertical hydro-generator units come in various structural forms. Based on different overall structural arrangements, they can be divided into guide bearings with individual oil grooves and guide bearings that share an oil groove with the thrust bearing. Guide bearings with individual oil grooves are typically used in the upper guide bearings of large and medium-capacity suspended hydro-generators or semi-umbrella hydro-generators. Their characteristic is a smaller diameter and fewer bearing pads. Guide bearings that share an oil groove with the thrust bearing are commonly used in the lower guide bearings of full-umbrella hydro-generators and the upper guide bearings of small and medium-capacity suspended hydro-generators. This structure has the advantage of compactness, but the guide bearing diameter is larger and the number of bearing pads is greater.

[0004] Although existing guide bearing structures meet the operational requirements of vertical hydro-generator units to a certain extent, some problems still exist in practical applications. First, adjusting the lubricating oil film clearance between the guide bearing pad and the sliding rotor is complex, especially when precise adjustments are needed to adapt to different operating conditions; traditional methods often fall short. Second, under special conditions such as earthquakes and generator short circuits, the guide bearing needs to withstand radial unbalanced forces several times greater than usual. Existing support structures are insufficient in transmitting these unbalanced forces, easily leading to structural damage or operational instability. Furthermore, the fixation of the support device is also a challenge, especially during long-term operation. Due to factors such as gravity and unit vibration, parts of the support device may shift, affecting the bearing lubricating oil film clearance and potentially causing accidents.

[0005] Therefore, in order to address the shortcomings of existing technologies and improve the operational safety and reliability of vertical hydro-generator units, a new generator guide bearing support structure is urgently needed. This structure should be able to conveniently and accurately adjust the lubricating oil film clearance between the guide bearing pad and the sliding rotor, effectively transmit unbalanced forces under various operating conditions, especially under extreme conditions, and ensure the safety and stability of the support device during operation, preventing component displacement. Utility Model Content

[0006] The present invention aims to overcome the shortcomings of the prior art and provide a generator guide bearing support structure.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A generator guide bearing support structure includes: a guide bearing housing, a wedge plate, a pad, a spherical plain bearing, and a guide bearing shell. The spherical plain bearing includes a shaft head and a bearing housing. One side of the wedge plate is set as a plane, and its opposite side is set as a wedge surface. The plane side of the wedge plate is disposed on the guide bearing housing and can slide along the axial direction of the guide bearing housing.

[0009] The guide bearing shell is provided with mounting holes, and the spherical plain bearing housing is installed in the mounting holes;

[0010] The shaft head is connected to a pad, which is in contact with a wedge plate. The contact surface between the pad and the wedge plate is set as an inclined surface corresponding to the wedge surface of the wedge plate.

[0011] Furthermore, the mounting hole is set as a stepped hole, and the spherical bearing housing is located in the lower layer of the stepped hole.

[0012] Furthermore, it includes a pressure plate for fixing the bearing housing, the pressure plate being configured as an annular shape that matches the upper step of the stepped hole.

[0013] Furthermore, the pressure plate is provided with bolt holes, and the upper step of the mounting hole is provided with corresponding bolt holes.

[0014] Furthermore, a protrusion is provided at the end of the pad that connects to the shaft head, and the protrusion matches the mounting side of the shaft head.

[0015] Furthermore, baffles are provided on both sides of the wedge surface of the wedge plate along the axis of the guide bearing seat.

[0016] Furthermore, the end of the wedge plate is provided with bolt holes and U-shaped grooves, and multiple sets of bolt holes are provided in the direction of the guide bearing seat corresponding to the position of the wedge plate.

[0017] Furthermore, a support plate is provided at the bottom of the guide bearing housing.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] 1. Improved clearance adjustment accuracy and efficiency: By adjusting the relative position of the wedge plate and the guide bearing housing, the lubricating oil film clearance between the guide bearing shell and the sliding rotor can be precisely and efficiently adjusted. This adjustment mechanism ensures that the bearing clearance can be precisely controlled under different operating conditions, especially special operating conditions, thereby maintaining a stable operating state.

[0020] 2. Enhanced Load-Bearing Capacity and Adaptability: This support structure possesses exceptional load-bearing capacity, effectively transmitting and withstanding enormous axial and radial unbalanced forces under extreme conditions, including earthquakes and generator short circuits. This robust load-bearing capacity significantly improves the safety and reliability of the generator set under extreme conditions.

[0021] 3. Reduced operating friction and energy consumption: The thrust spherical bearing used in the structure significantly reduces the resistance of the guide bearing during deflection and sliding, thereby reducing energy consumption. This design not only improves the swing flexibility of the guide bearing but also extends the bearing's service life.

[0022] 4. Enhanced Structural Stability and Safety: By incorporating components such as wedge plates, pads, and spherical bearings, and combining them with stepped holes and pressure plates for fixation, the stability and safety of the entire support device are ensured during operation. This design effectively prevents parts from shifting due to gravity, unit vibration, or other factors, thereby guaranteeing the continuous stability of bearing performance.

[0023] 5. Simplified installation and maintenance process: The installation and maintenance of this support structure are relatively simple, with good leveling effect, which not only saves processing time but also shortens the manufacturing cycle. In addition, due to its simple and reliable structure, maintenance costs are also significantly reduced.

[0024] 6. Optimized Lubrication and Cooling: A well-designed structure ensures a uniform distribution and effective formation of the lubricating oil film between the guide bearing pad and the sliding rotor, thus improving lubrication. Simultaneously, the optimized lubrication system design enhances cooling, helping to maintain the bearing within a suitable temperature range.

[0025] 7. Enhanced impact resistance: The support structure is designed with impact resistance in mind. Especially in extreme situations such as earthquakes, it can effectively absorb and disperse impact energy, protecting bearings and units from damage.

[0026] 8. Improved versatility and adaptability: The generator guide bearing support structure has wide versatility and adaptability, and can be applied to different types and capacities of vertical hydro-generator sets, which has high value for promotion and application. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the wedge plate structure of this utility model;

[0029] Marked in the image:

[0030] 1-Guide bearing housing, 2-Wedge plate, 3-Pad plate, 4-Spherical plain bearing, 5-Guide bearing shell, 6-Mounting hole, 7-Spherical plain bearing shaft head, 8-Spherical plain bearing housing, 9-Pressure plate, 10-Protrusion, 11-Baffle, 12-U-groove, 13-Support plate.

[0031] Specific examples

[0032] The present invention will now be described in detail with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0034] Example 1

[0035] In this embodiment, as Figure 1 As shown, a generator guide bearing support structure includes: a guide bearing seat 1, a wedge plate 2, a pad 3, a spherical bearing 4, and a guide bearing shell 5. The spherical bearing 4 includes a shaft head and a bearing seat. One side of the wedge plate 2 is set as a plane, and its opposite side is set as a wedge surface. The plane side of the wedge plate 2 is set on the guide bearing seat 1 and can slide along the axial direction of the guide bearing seat 1.

[0036] The guide bearing shell 5 is provided with mounting holes 6, and the bearing seat of the spherical plain bearing 4 is disposed in the mounting holes 6;

[0037] The shaft head is connected to a pad 3, which is connected to a wedge plate 2. The contact surface between the pad 3 and the wedge plate 2 is set as an inclined surface corresponding to the wedge surface of the wedge plate 2.

[0038] Specifically, the mounting hole 6 is annular for mounting the bearing housing, the shaft head has a mounting groove in the middle, and the pad 3 is convex with its protrusion 10 installed into the shaft head mounting groove to prevent radial displacement.

[0039] By using the wedge plate 2 in conjunction with the guide bearing seat 1, the lubricating oil film gap between the guide bearing shell 5 and the sliding rotor can be adjusted conveniently and accurately, ensuring precise control of the bearing gap under different working conditions, thereby improving the operational stability of the unit. At the same time, the use of the spherical bearing 4 significantly reduces the resistance of the guide bearing during the deflection and sliding process, reduces energy consumption, and improves the swing flexibility of the guide bearing.

[0040] Specifically, a first shim is provided between the outer ring of the spherical plain bearing 4 and the guide bearing housing 1, and a second shim is provided between the inner ring of the spherical plain bearing 4 and the wedge plate 2. The use of these shims helps to distribute the load evenly, reduce local stress concentration, and further improve the stability and service life of the support structure.

[0041] Furthermore, mounting hole 6 is configured as a stepped hole, and the bearing housing of spherical plain bearing 4 is located in the lower layer of the stepped hole.

[0042] The stepped hole is set in two steps, with the lower step used to install the bearing housing and the upper step used to install the pressure plate 9.

[0043] This design not only ensures the stability of the support structure but also facilitates installation and maintenance. Furthermore, the stepped holes further enhance the leveling effect and fixing strength.

[0044] Furthermore, it includes a pressure plate 9 for fixing the bearing housing, the pressure plate 9 being configured as an annular shape that matches the upper step of the stepped hole.

[0045] The stepped hole includes a first hole and a second hole, with the second hole having a larger diameter than the first hole. The bolt passes sequentially through the pressure plate 9, wedge plate 2, pad plate 3, and guide bearing seat 1 and extends into the second hole. This stepped hole design helps improve the fixing effect of the pressure plate 9 and the overall stability of the support structure.

[0046] Furthermore, the pressure plate 9 is provided with bolt holes, and the upper step of the mounting hole 6 is provided with corresponding bolt holes.

[0047] The fixed wedge plate 2 is used to adjust the height of the wedge plate 2, so as to keep the overall structure stable.

[0048] Furthermore, a protrusion 10 is provided at the end of the pad 3 that connects to the shaft head, and the protrusion 10 matches the mounting side of the shaft head.

[0049] Furthermore, baffles 11 are provided on both sides of the wedge surface of the wedge plate 2 along the axis of the guide bearing seat 1.

[0050] The baffle 11 is used to limit the circumferential displacement of the pad 3, prevent it from shifting during movement and sliding out of the wedge surface range of the wedge plate 2, and maintain the overall stability of the guide bearing.

[0051] Furthermore, the wedge plate 2 is provided with bolt holes and U-shaped grooves at its end, and the guide bearing seat 1 is provided with multiple sets of bolt holes corresponding to the position of the wedge plate 2 along its axial direction.

[0052] The inner surface of the guide bearing housing 1 is provided with a rectangular groove that mates with the wedge plate 2. The wedge plate 2 is installed on the guide bearing housing 1 by mates with the rectangular groove. This structural design makes the installation and removal of the wedge plate 2 more convenient, and the mate between the wedge plate 2 and the rectangular groove also improves the stability of the connection.

[0053] Furthermore, a support plate 13 is provided at the bottom of the guide bearing housing 1.

[0054] Furthermore, a method for installing a generator guide bearing support structure includes the following steps:

[0055] S1: Set the mounting hole 6 of the guide bearing shell 5 as a stepped hole;

[0056] S2: Place the bearing housing of the spherical plain bearing 4 in the lower layer of the stepped hole;

[0057] S3: Fix the bearing seat of the spherical bearing 4 to the upper layer of the stepped hole by means of the pressure plate 9, and fasten the pressure plate 9 to the corresponding bolt hole of the upper step of the mounting hole 6 by bolts;

[0058] S4: Set one side of the wedge plate 2 on the guide bearing seat 1;

[0059] S5: The pad 3 is connected to the shaft end of the spherical bearing 4;

[0060] S6: Adjust the height of the wedge plate 2 to adjust the distance between the guide bearing seat 1 and the guide bearing pad 5, so that the pad 3 and the wedge surface of the wedge plate 2 are in contact.

[0061] Furthermore, in step S6, the wedge plate 2 is hoisted through the U-shaped groove, and the gap is adjusted by positioning through the bolt holes at different heights of the guide bearing seat 1.

[0062] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A generator guide bearing support structure, characterized in that: include: The bearing housing (1), wedge plate (2), pad plate (3), spherical bearing (4) and bearing shell (5) are provided. The spherical bearing (4) includes a shaft head and a bearing housing. One side of the wedge plate (2) is set as a plane and its opposite side is set as a wedge surface. The plane side of the wedge plate (2) is set on the bearing housing (1) and can slide along the axial direction of the bearing housing (1). The guide bearing shell (5) is provided with a mounting hole (6), and the bearing seat of the spherical bearing (4) is disposed in the mounting hole (6); The shaft head is connected to a pad (3), which is in contact with the wedge plate (2), and the contact surface between the pad (3) and the wedge plate (2) is set as an inclined surface corresponding to the wedge surface of the wedge plate (2).

2. The generator guide bearing support structure according to claim 1, characterized in that: The mounting hole (6) is configured as a stepped hole, and the bearing seat of the spherical bearing (4) is located in the lower layer of the stepped hole.

3. The generator guide bearing support structure according to claim 2, characterized in that: Includes a pressure plate (9) for fixing the bearing housing, the pressure plate (9) being configured as an annular shape to match the upper step of the stepped hole.

4. The generator guide bearing support structure according to claim 3, characterized in that: The pressure plate (9) is provided with bolt holes, and the upper step of the mounting hole (6) is provided with corresponding bolt holes.

5. The generator guide bearing support structure according to claim 1, characterized in that: The pad (3) is provided with a protrusion (10) at the end that connects to the shaft head, and the protrusion (10) matches the mounting side of the shaft head.

6. The generator guide bearing support structure according to claim 1, characterized in that: The wedge plate (2) has baffles (11) on both sides of the wedge surface along the axis of the guide bearing seat (1).

7. A generator guide bearing support structure according to claim 6, characterized in that: The wedge plate (2) is provided with bolt holes and U-shaped grooves at its end, and the guide bearing seat (1) is provided with multiple sets of bolt holes in the axial direction corresponding to the position of the wedge plate (2).

8. The generator guide bearing support structure according to claim 1, characterized in that: The bottom of the guide bearing seat (1) is provided with a support plate (13).

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