Generator guide bearing supporting structure and installation method thereof

Abstract

The invention discloses a generator guide bearing supporting structure and an installation method thereof, and relates to the technical field of vertical hydroelectric generating set guide bearings, in particular to the generator guide bearing supporting structure and the installation method thereof, the generator guide bearing supporting structure comprises a guide bearing seat, a wedge plate, a base plate, a knuckle bearing and a guide bearing bush, and the knuckle 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] The invention relates to the technical field of guide bearings of vertical hydroelectric generator sets, and in particular to a generator guide bearing support structure and an installation method thereof. Background Art

[0002] Vertical turbine generator sets are important equipment for converting water energy into electrical energy and are widely used in the field of hydropower generation. Their working principle is to use water energy to drive the turbine to rotate, which in turn drives the generator to convert mechanical energy into electrical energy. The stable operation of vertical turbine generator sets depends on the stability of their shaft system, which is ensured by the guide bearing support structure. As one of the key components of vertical turbine generator sets, guide bearings mainly bear the radial mechanical unbalance force and electromagnetic unbalance force of the rotating part of the unit to ensure the stable operation of the main shaft within the bearing clearance range.

[0003] The existing guide bearing structures of vertical turbine generator sets are diverse. According to the different overall structural arrangements, they can be divided into guide bearings with separate oil grooves and guide bearings that share an oil groove with thrust bearings. Guide bearings with separate oil grooves are usually used for upper guide bearings of large and medium-capacity suspended turbine generators or semi-umbrella turbine generators. They are characterized by small guide bearing pad diameters and fewer pads. Guide bearings that share an oil groove with thrust bearings are often used for lower guide bearings of full-umbrella turbine generators and upper guide bearings of small and medium-capacity suspended turbine generators. This structure has the advantage of compact structure, but the guide bearing diameter is large and the number of pads is large.

[0004] Although the existing guide bearing structure meets the operating requirements of vertical hydro-turbine generator sets to a certain extent, there are still some problems in practical applications. First, the adjustment of the lubricating oil film gap between the guide bearing bushing and the sliding rotor is relatively complicated, especially when precise adjustment is required to adapt to different working conditions, and traditional methods are often difficult to meet the requirements. Secondly, under special working conditions such as earthquakes and generator short circuits, the guide bearing needs to withstand radial unbalanced forces that are several times greater than the conventional ones. The existing support structure is insufficient in transmitting these unbalanced forces, which can easily lead to structural damage or unstable operation. In addition, the fixation of the support device is also a challenge, especially during long-term operation, due to the influence of factors such as gravity and unit vibration, the parts of the support device may be displaced, thereby affecting the bearing lubricating oil film gap and causing accidents.

[0005] Therefore, in order to solve the deficiencies in the prior art and improve the operating safety and reliability of vertical hydro-turbine generator sets, a new generator guide bearing support structure is urgently needed. The structure should be able to conveniently and accurately adjust the lubricating oil film gap between the guide bearing bush and the sliding rotor, effectively transmit the unbalanced force under various working conditions, especially under extreme working conditions, and ensure the safety and firmness of the support device during operation to avoid displacement of parts. Summary of the invention

[0006] The present invention aims to overcome the above-mentioned shortcomings of the prior art and provides a generator guide bearing support structure and an installation method thereof.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A generator guide bearing support structure comprises: a guide bearing seat, a wedge plate, a pad, a spherical bearing and a guide bearing bush, wherein the spherical bearing comprises a shaft head and a bearing seat; one side of the wedge plate is set as a plane and the opposite side thereof is set as a wedge surface, one side of the wedge plate plane is set on the guide bearing seat and can slide axially along the guide bearing seat;

[0009] The guide bearing bush is provided with a mounting hole, and the spherical bearing seat is arranged in the mounting hole;

[0010] The shaft head is connected with a pad, the pad is connected with the wedge plate, and the connecting surface of the pad and the wedge plate is arranged as an inclined surface corresponding to the wedge surface of the wedge plate.

[0011] Furthermore, the mounting hole is arranged as a stepped hole, and the spherical bearing seat is arranged at the lower layer of the stepped hole.

[0012] Furthermore, it includes a pressing plate for fixing the bearing seat, and the pressing plate is set to be annular and 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 one end of the backing plate connected to the shaft head, and the protrusion matches the installation 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, a bolt hole and a U-shaped groove are provided at the end of the wedge plate, and a plurality of groups of bolt holes are provided at positions corresponding to the wedge plate in the axial direction of the guide bearing seat.

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

[0018] Furthermore, a method for installing a generator guide bearing support structure comprises the following steps:

[0019] S1: Set the installation hole of the guide bearing bushing as a stepped hole;

[0020] S2: Place the bearing seat of the spherical plain bearing on the lower layer of the stepped hole;

[0021] S3: fix the bearing seat of the spherical plain bearing to the upper layer of the stepped hole through a pressure plate, and fasten the pressure plate to the corresponding bolt holes of the upper step of the mounting hole through bolts;

[0022] S4: Place one side of the wedge plate plane on the guide bearing seat;

[0023] S5: The backing plate is connected to the shaft head of the spherical bearing;

[0024] S6: Adjust the height of the wedge plate to adjust the distance between the guide bearing seat and the guide bearing shell so that the pad and the wedge surface of the wedge plate are in contact.

[0025] Furthermore, in step S6, the wedge plate is hoisted through the U-shaped groove, and the gap is adjusted by positioning through bolt holes at different heights of the guide bearing seat.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. Improve the accuracy and efficiency of clearance adjustment: By adjusting the relative position of the wedge plate and the guide bearing seat, the lubricating oil film clearance between the guide bearing bush and the sliding rotor can be accurately and efficiently adjusted. This adjustment mechanism ensures that the bearing clearance can be accurately controlled under different working conditions, especially special working conditions, so as to maintain a stable operating state.

[0028] 2. Enhanced bearing capacity and adaptability: The support structure has excellent bearing capacity and can effectively transmit and withstand huge axial and radial unbalanced forces under extreme working conditions including earthquakes and generator short circuits. This strong bearing capacity significantly improves the safety and reliability of the generator set under extreme conditions.

[0029] 3. Reduce operating friction and energy consumption: The thrust spherical bearing used in the structure significantly reduces the resistance of the guide bearing during the deflection and sliding process, thereby reducing energy consumption. This design not only improves the swing flexibility of the guide bearing, but also extends the service life of the bearing.

[0030] 4. Improve structural stability and safety: By setting up components such as wedge plates, pads, and spherical bearings, combined with stepped holes and pressure plate fixing methods, the stability and safety of the entire support device during operation are ensured. This design effectively avoids the displacement of parts due to factors such as gravity and unit vibration, thereby ensuring the continued stability of bearing performance.

[0031] 5. Simplified installation and maintenance process: The installation and maintenance process of the support structure is relatively simple, and the leveling effect is good, which not only saves processing time, but also shortens the manufacturing cycle. In addition, due to the simple and reliable structure, the maintenance cost is also significantly reduced.

[0032] 6. Optimize lubrication and cooling effects: Through reasonable structural design, the lubricating oil film is evenly distributed and effectively formed between the guide bearing bush and the sliding rotor, thereby improving the lubrication effect. At the same time, the optimized design of the lubrication system also enhances the cooling effect, which helps to keep the bearing running within a suitable temperature range.

[0033] 7. Enhanced impact resistance: The support structure is designed with full consideration of impact resistance, especially in extreme situations such as earthquakes, it can effectively absorb and disperse impact energy and protect bearings and units from damage.

[0034] 8. Improve versatility and adaptability: The generator guide bearing support structure has wide versatility and adaptability, can be applied to vertical hydro-turbine generator sets of different types and capacities, and has high promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the wedge plate structure of the present invention;

[0037] Markings in the figure:

[0038] 1 - guide bearing seat, 2 - wedge plate, 3 - pad, 4 - spherical bearing, 5 - guide bearing bush, 6 - mounting hole, 7 - spherical bearing shaft head, 8 - spherical bearing seat, 9 - pressure plate, 10 - bump, 11 - baffle, 12 - U-shaped groove, 13 - support plate.

[0039] Specific Examples

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] Embodiment 1

[0043] In this embodiment, if Figure 1 As shown, a generator guide bearing support structure comprises: a guide bearing seat 1, a wedge plate 2, a pad 3, a spherical bearing 4 and a guide bearing bush 5, wherein the spherical bearing 4 comprises a shaft head and a bearing seat; one side of the wedge plate 2 is set as a plane and the opposite side thereof is set as a wedge surface, one side of the plane of the wedge plate 2 is set on the guide bearing seat 1, and can slide axially along the guide bearing seat 1;

[0044] The guide bearing bush 5 is provided with a mounting hole 6, and the bearing seat of the spherical bearing 4 is arranged in the mounting hole 6;

[0045] The shaft head is connected with a backing plate 3, which is connected with the wedge plate 2, and the connecting surface of the backing plate 3 and the wedge plate 2 is set as an inclined surface corresponding to the wedge surface of the wedge plate 2.

[0046] Specifically, the mounting hole 6 is set to be annular for mounting the bearing seat, a mounting groove is set in the middle of the shaft head, and the pad 3 is set to be convex, and its protrusion 10 is installed into the shaft head mounting groove to prevent it from radial displacement.

[0047] By using the wedge plate 2 in conjunction with the guide bearing seat 1, the lubricating oil film gap between the guide bearing bush 5 and the sliding rotor can be conveniently and accurately adjusted to ensure precise control of the bearing gap under different working conditions, thereby improving the operating 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.

[0048] Specifically, a first gasket is provided between the outer ring of the spherical bearing 4 and the guide bearing seat 1, and a second gasket is provided between the inner ring of the spherical bearing 4 and the wedge plate 2. The use of these gaskets helps to evenly distribute the load, reduce local stress concentration, and further improve the stability and service life of the support structure.

[0049] Furthermore, the mounting hole 6 is arranged as a stepped hole, and the bearing seat of the spherical bearing 4 is arranged at the lower layer of the stepped hole.

[0050] The stepped hole is arranged in two steps, the lower step is used for installing the bearing seat, and the upper step is used for installing the pressure plate 9.

[0051] This design not only ensures the stability of the supporting structure, but also facilitates installation and maintenance. At the same time, the setting of stepped holes further improves the leveling effect and fixing strength.

[0052] Furthermore, it comprises a pressing plate 9 for fixing the bearing seat, and the pressing plate 9 is arranged in a ring shape matching the upper step of the stepped hole.

[0053] The stepped hole includes a first hole and a second hole, the diameter of the second hole is larger than the diameter of the first hole, and the bolt passes through the pressing plate 9, the wedge plate 2, the backing plate 3 and the guide bearing seat 1 in sequence and extends into the second hole. This stepped hole design helps to improve the fixing effect of the pressing plate 9 and the overall stability of the supporting structure.

[0054] Furthermore, the pressing plate 9 is provided with bolt holes, and the upper step of the mounting hole 6 is provided with corresponding bolt holes.

[0055] It is used to fix the wedge plate 2 after adjusting the height of the wedge plate 2 so that the overall structure remains stable.

[0056] Furthermore, a protrusion 10 is provided at one end of the backing plate 3 connected to the shaft head, and the protrusion 10 matches the installation side of the shaft head.

[0057] 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 .

[0058] The baffle 11 is used to limit the circumferential displacement of the backing plate 3 to prevent it from deviating during movement and sliding out of the wedge surface range of the wedge plate 2, thereby maintaining the overall stability of the guide bearing.

[0059] Furthermore, a bolt hole and a U-shaped groove are provided at the end of the wedge plate 2, and a plurality of groups of bolt holes are provided at positions corresponding to the wedge plate 2 in the axial direction of the guide bearing seat 1.

[0060] The inner surface of the guide bearing seat 1 is provided with a rectangular groove that matches the wedge plate 2, and the wedge plate 2 is installed on the guide bearing seat 1 by matching with the rectangular groove. This structural design makes the installation and removal of the wedge plate 2 more convenient, and the matching of the wedge plate 2 and the rectangular groove also improves the stability of the connection.

[0061] Furthermore, a support plate 13 is provided at the bottom of the guide bearing seat 1 .

[0062] Furthermore, a method for installing a generator guide bearing support structure comprises the following steps:

[0063] S1: Setting the mounting hole 6 of the guide bearing bush 5 as a stepped hole;

[0064] S2: placing the bearing seat of the spherical plain bearing 4 in the lower layer of the stepped hole;

[0065] S3: fix the bearing seat of the spherical bearing 4 to the upper layer of the stepped hole through the pressing plate 9, and fasten the pressing plate 9 to the corresponding bolt holes of the upper step of the mounting hole 6 through bolts;

[0066] S4: placing one side of the plane of the wedge plate 2 on the guide bearing seat 1;

[0067] S5: The backing plate 3 is connected to the shaft head of the spherical bearing 4;

[0068] S6: Adjust the height of the wedge plate 2 to adjust the distance between the guide bearing seat 1 and the guide bearing bush 5, so that the pad 3 and the wedge surface of the wedge plate 2 are in contact.

[0069] Furthermore, in step S6, the wedge plate 2 is hoisted through the U-shaped groove, and the gap is adjusted by positioning through bolt holes at different heights of the guide bearing seat 1.

[0070] The above description is only a preferred embodiment of the invention and is not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention should be included in the protection scope of the invention.

Claims

1. A generator guide bearing support structure, characterized in that: include: A guide bearing seat (1), a wedge plate (2), a backing plate (3), a spherical bearing (4) and a guide bearing bush (5), wherein the spherical bearing (4) comprises a shaft head and a bearing seat; one side of the wedge plate (2) is arranged as a plane and the opposite side thereof is arranged as a wedge surface; one side of the plane of the wedge plate (2) is arranged on the guide bearing seat (1) and can slide axially along the guide bearing seat (1); The guide bearing bush (5) is provided with a mounting hole (6), and the bearing seat of the spherical bearing (4) is arranged in the mounting hole (6); The shaft head is connected to a pad (3), the pad (3) is connected to the wedge plate (2), and the connecting surface of the pad (3) and the wedge plate (2) is arranged as an inclined surface corresponding to the wedge surface of the wedge plate (2).

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

3. A generator guide bearing support structure according to claim 2, characterized in that: The invention comprises a pressing plate (9) for fixing the bearing seat, wherein the pressing plate (9) is arranged in a ring shape matching the upper step of the stepped hole.

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

5. The generator guide bearing support structure according to claim 1, characterized in that: A convex block (10) is provided at one end of the pad (3) connected to the shaft head, and the convex block (10) matches the installation side of the shaft head.

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

7. A generator guide bearing support structure according to claim 6, characterized in that: The end of the wedge plate (2) is provided with a bolt hole and a U-shaped groove, and the guide bearing seat (1) is provided with a plurality of groups of bolt holes at positions corresponding to the wedge plate (2) in the axial direction.

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

9. A method for installing a generator guide bearing support structure, applied to a generator guide bearing support structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The mounting hole (6) of the guide bearing bush (5) is set as a stepped hole; S2: placing the bearing seat of the spherical bearing (4) on the lower layer of the stepped hole; S3: fix the bearing seat of the spherical bearing (4) to the upper layer of the stepped hole by means of a pressing plate (9), and fasten the pressing plate (9) to the corresponding bolt holes of the upper step of the mounting hole (6) by means of bolts; S4: placing one side of the plane of the wedge plate (2) on the guide bearing seat (1); S5: The backing plate (3) is connected to the shaft head of the spherical bearing (4); S6: The height of the wedge plate (2) is adjusted to adjust the distance between the guide bearing seat (1) and the guide bearing bush (5) so that the backing plate (3) and the wedge surface of the wedge plate (2) are in contact.

10. The method for installing a generator guide bearing support structure according to claim 9, characterized in that: In step S6, the wedge plate (2) is hoisted through the U-shaped groove, and the gap is adjusted by positioning through bolt holes at different heights of the guide bearing seat (1).

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