Hydrogenerator and thrust bearing arrangement

Abstract

The application discloses a water turbine generator and thrust bearing structure, and belongs to the technical field of water turbine generators. The water turbine generator thrust bearing structure comprises a base ring and an optimization mechanism. The top of the base ring is sequentially provided with a bearing pad and a thrust pad from bottom to top. The optimization mechanism comprises a first outer baffle, a second outer baffle and an inner baffle. The first outer baffle and the second outer baffle are located on the outer surfaces of the bearing pad and the thrust pad and constrain the bearing pad and the thrust pad. The inner baffle is located on the inner surface of the thrust pad and constrains the thrust pad. The water turbine generator thrust bearing structure has the advantages of self-adjusting function and good impact resistance.

Description

Technical Field

[0001] This invention relates to the technical field of water turbines, and more particularly to a water turbine generator and thrust bearing structure. Background Technology

[0002] Thrust bearings are mechanical structural components that utilize the principle of fluid lubrication for load bearing. They are one of the key components of hydroelectric generator sets, bearing the entire axial load of the unit. The support method of the thrust bearing plays a crucial role in the safe and stable operation of both the bearing and the unit. Commonly used rigid screw support structures, due to the difficulty in adjusting the stress on the bearing pads, often result in uneven stress distribution, frequently affecting the safe operation of the thrust bearing and even causing bearing failure accidents, leading to economic losses for the power plant. With the increasing number of hydroelectric generator sets, more and more units are adopting flexible support structures for their thrust bearings, such as flexible oil tank supports, counterweight supports, piston supports, spring supports, and flexible disc supports.

[0003] In existing technology, during unit operation, the thrust bearing expands due to heat; during shutdown, the thrust bearing changes from a hot state to a cold state, generating a radially inward thermal contraction force. When the high-roof is withdrawn, there is no lubrication between the thrust bearing and the thrust bearing, resulting in significant friction. This radial contraction force causes the thrust bearing to shift slightly inward. Upon subsequent shutdowns, the same process repeats. Over a long period, this accumulation leads to a noticeable inward displacement of the thrust bearing. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a thrust bearing structure for a hydro-generator, which has the advantages of self-adjustment function and good impact resistance.

[0005] According to an embodiment of the present invention, the thrust bearing structure of a hydro-generator includes a base ring and an optimization mechanism. The top of the base ring is provided with a support pad and a thrust pad from bottom to top. The optimization mechanism includes a first outer baffle, a second outer baffle, and an inner baffle. The first outer baffle and the second outer baffle are located on the outer surfaces of the support pad and the thrust pad and constrain the support pad and the thrust pad. The inner baffle is located on the inner surface of the thrust pad and constrains the thrust pad.

[0006] The thrust bearing structure of the hydro-generator according to embodiments of the present invention has the advantages of self-adjustment function and good impact resistance. This application uses a baffle to fix the thrust bearing and the support pad, thereby limiting their movement. By limiting the movement of the support pad and the thrust bearing, the inward movement of the thrust bearing after thermal expansion and contraction can be prevented.

[0007] In some embodiments, the first outer baffle and the second outer baffle are U-shaped plates, with the two ends of the first outer baffle connected to the jack and the base ring respectively, and the two ends of the second outer baffle connected to the thrust pad and the jack respectively.

[0008] In some embodiments, the outer surface of the base ring is provided with a first sliding groove, the inner surface of the base ring is provided with a sliding groove, the outer surface of the support plate is provided with two first limiting grooves, the outer surface of the thrust plate is provided with a second limiting groove, the inner surface of the thrust plate is provided with a limiting sliding groove, the two ends of the first outer baffle plate respectively enter the first sliding groove and the first limiting groove, the two ends of the second outer baffle plate respectively enter the first limiting groove and the second limiting groove, and the two ends of the inner baffle plate respectively enter the limiting sliding groove and the sliding groove.

[0009] In some embodiments, the first outer baffle is fixed to the outer surface of the base ring by bolts, and the second outer baffle is fixed to the outer surface of the jack by bolts.

[0010] In some embodiments, an adjustment mechanism is further included, the adjustment mechanism including a support ring, a support block, an adjustment member and a limiting block, the top of the support ring is provided with a limiting groove, the limiting blocks are located at both ends of the limiting groove, both ends of the support block are in contact with the two limiting blocks respectively, and the adjustment member is connected to the support ring and is throttle connected to the support block.

[0011] In some embodiments, the adjusting member includes a threaded sleeve, a connecting plate, and an adjusting threaded rod. The threaded sleeve is located in the limiting groove and connected to the base ring and slidably connected to the support block. The first end of the adjusting threaded rod is threadedly connected to the threaded sleeve. The connecting plate is connected to the support block and abuts against the second end of the adjusting threaded rod.

[0012] In some embodiments, the threaded sleeves are fixed at equal intervals along the circumferential direction on the outer surface of the support ring.

[0013] In some embodiments, the support block is a stepped arc-shaped block, and the thickness of the support block gradually decreases from the edge of the support ring toward the center as the distance from the center of the support ring decreases.

[0014] In some embodiments, the top of the base ring is provided with a spring assembly, a bearing, and a thrust bearing in sequence from bottom to top. The spring assembly is connected to the base ring by bolts. A boss is provided between the spring assembly and the adjacent spring assembly. The boss is connected to the base ring. A spacer is provided at the bottom of the boss. One end of the spacer abuts against one side of the inner surface of the adjacent bearing.

[0015] In some embodiments, the spacer block is a T-shaped block, the end of which abuts against the inner surfaces of two adjacent trowels.

[0016] According to an embodiment of the present invention, the hydro-generator includes a thrust bearing structure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the thrust bearing structure of the hydro-generator according to an embodiment of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the assembly of the bearing pad, thrust pad, and spring of the thrust bearing structure of the hydro-generator according to an embodiment of the present invention.

[0019] Figure 3 This is a three-dimensional cross-sectional view of the thrust bearing structure of the hydro-generator according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the adjustment mechanism of the thrust bearing structure of the hydro-generator according to an embodiment of the present invention.

[0021] Figure 5 This is a partial unfolded structural diagram of the adjustment mechanism of the thrust bearing structure of the hydro-generator according to an embodiment of the present invention.

[0022] Figure 6 yes Figure 3 A magnified view of a portion of region A in the middle.

[0023] Figure 7 yes Figure 4 A magnified view of a portion of region B in the middle;

[0024] Reference numerals in the attached drawings: 1. Base ring; 2. Spring assembly; 3. Support plate; 4. Thrust plate; 5. Boss; 6. Optimization mechanism; 601. First outer baffle; 602. Second outer baffle; 603. Inner baffle; 604. Spacer block; 7. Adjustment mechanism; 701. Support ring; 702. Limiting block; 703. Threaded sleeve; 704. Support block; 705. Connecting plate; 706. Adjusting threaded rod. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] According to an embodiment of the present invention, the thrust bearing structure of a hydro-generator includes a base ring 1 and an optimization mechanism 6. From bottom to top, the top of the base ring 1 is provided with a support plate 3 and a thrust plate 4. The optimization mechanism 6 includes a first outer baffle 601, a second outer baffle 602, and an inner baffle 603. The first and second outer baffles 601 and 602 are located on the outer surfaces of the support plate 3 and the thrust plate 4 and constrain them. The inner baffle 603 is located on the inner surface of the thrust plate 4 and constrains it. The thrust plate 4 is disposed on top of the support plate 3. The number of first outer baffles 601 is twice the number of support plates 3. There is a one-to-one correspondence between the support plates 3 and the thrust plates 4. When there are twelve support plates 3, there are twenty-four first outer baffles 601 and twenty-four second outer baffles 602. The two ends of the first outer baffles 601 extend into the interior of the base ring 1 and the interior of the support plate 3, respectively. The first outer baffles 601 fix the support plate 3 and the base ring 1, restricting the movement of the support plate 3. The two ends of the second outer baffle 602 extend into the interior of the bearing 3 and the thrust bearing 4, respectively, fixing the bearing 3 and the thrust bearing 4 and restricting the movement of the thrust bearing 4. The first outer baffle 601 and the second outer baffle 602 are both located on the edge of the outer surface of the base ring 1, bearing 3, and thrust bearing 4 away from the center of the base ring 1, while the inner baffle 603 is located on the edge of the inner surface of the bearing 3 and the thrust bearing 4 near the center of the base ring 1. The inner baffle 603 restricts the bearing 3 and the base ring 1. The first outer baffle 601, the second outer baffle 602, and the inner baffle 603 of the optimized mechanism 6 cooperate to limit the bearing 3 and the thrust bearing 4, preventing the thrust bearing 4 from shifting inward after thermal expansion and contraction, and avoiding the impact of environmental factors on the thrust bearing during use.

[0027] The thrust bearing structure of the hydro-generator according to embodiments of the present invention has the advantages of self-adjustment function and good impact resistance.

[0028] In some embodiments, the first outer baffle 601 and the second outer baffle 602 are U-shaped plates. The two ends of the first outer baffle 601 are connected to the jack 3 and the base ring 1, respectively, and the two ends of the second outer baffle 602 are connected to the thrust pad 4 and the jack 3, respectively.

[0029] In some embodiments, the outer surface of the base ring 1 is provided with a first sliding groove, the inner surface of the base ring 1 is provided with a sliding groove, the outer surface of the support 3 is provided with two first limiting grooves, the outer surface of the thrust pad 4 is provided with a second limiting groove, the inner surface of the thrust pad 4 is provided with a limiting sliding groove, the two ends of the first outer baffle 601 respectively enter the first sliding groove and the first limiting groove, the two ends of the second outer baffle 602 respectively enter the first limiting groove and the second limiting groove, and the two ends of the inner baffle 603 respectively enter the limiting sliding groove and the sliding groove.

[0030] Specifically, two first limiting grooves on the outer surface of the thrust bearing 3 are spaced apart in the thickness direction of the base ring 1. The lower first limiting groove accommodates one end of the first outer baffle 601, and the other end of the first outer baffle 601 enters the first sliding groove of the base ring 1. The upper first limiting groove accommodates one end of the second outer baffle 602, and the other end of the second outer baffle 602 enters the second limiting groove of the thrust bearing 4. One end of the inner baffle 603 enters the limiting sliding groove of the thrust bearing 4, and the other end enters the sliding groove of the base ring 1. The first outer baffle 601, the second outer baffle 602, and the inner baffle 603 are U-shaped plates. The U-shaped plates cooperate with the grooves to provide a limiting function, facilitating disassembly and adjustment. The first sliding groove, the first limiting groove, the second limiting groove, the sliding groove, and the limiting sliding groove are all grooves surrounding the center of the base ring 1.

[0031] In some embodiments, the first outer baffle 601 is fixed to the outer surface of the base ring 1 by bolts, and the second outer baffle 602 is fixed to the outer surface of the jack 3 by bolts.

[0032] Specifically, the first outer baffle 601 and the second outer baffle 602 are fixed by bolts, which ensures the connection strength and prevents the first outer baffle 601 and the second outer baffle 602 from detaching from the support plate 3 and the thrust plate 4. When fixing the baffles, the bolts are tightened to limit the position of the support plate 3 and the thrust plate 4.

[0033] In some embodiments, the system further includes an adjustment mechanism 7, which includes a support ring 701, a support block 704, an adjustment member, and a limiting block 702. The top of the support ring 701 is provided with a limiting groove, and the limiting blocks 702 are located at both ends of the limiting groove to form guide grooves. Both ends of the support block 704 are in contact with the two limiting blocks 702 respectively. The adjustment member is connected to the support ring 701 and is throttle connected to the support block 704.

[0034] Specifically, the adjusting mechanism 7 can adjust the position of the support block 704 to prevent the thrust bearing from being affected by the environment during use. The limiting blocks 702 are located at both ends of the limiting groove. The opposite sides of the two limiting blocks 702 cooperate to form a guide groove. The axial direction of the guide groove is perpendicular to the axial direction of the limiting groove. The support block 704 can move in the axial direction of the guide groove. The outer surfaces of the opposite sides of the two limiting blocks 702 are parallel to each other, which guides the support block 704 during movement and prevents it from shifting. Three limiting grooves can be provided, and the inner surface of the limiting groove is fixed to the limiting block 702 by bolts. A part of the adjusting component is located within the limiting groove. The adjusting component is connected to the support block 704 via a threaded connection, and the adjusting component drives the support block 704 to move.

[0035] In some embodiments, the adjusting member includes a threaded sleeve 703, a connecting plate 705, and an adjusting threaded rod 706. The threaded sleeve 703 is located in a limiting groove and connected to the base ring 1 and slidably connected to the support block 704. The first end of the adjusting threaded rod 706 is threadedly connected to the threaded sleeve 703. The connecting plate 705 is connected to the support block 704 and abuts against the second end of the adjusting threaded rod 706.

[0036] Specifically, the outer surface of the threaded sleeve 703 is slidably connected to the support block 704, the adjusting threaded rod 706 is threadedly connected to the threaded sleeve 703, and the second end of the adjusting threaded rod 706 rotates within the limiting space formed by the connecting plate 705 and the support block 704. By rotating the second end of the adjusting threaded rod 706, the adjusting threaded rod 706 drives the support block 704 to move relative to the threaded sleeve 703, which enables precise height adjustment of the bearing structure.

[0037] In some embodiments, the threaded sleeve 703 is fixed at equal intervals along the circumferential direction on the outer surface of the support ring 701.

[0038] Specifically, the threaded sleeve 703 is fixed at equal intervals in the limiting groove of the support ring 701 to protect the threaded sleeve 703 and the adjusting threaded rod 706. The axial direction of the threaded sleeve 703 is the radial direction of the base ring 1, which allows the support block 704 to move toward or away from the center of the base ring 1 in the radial direction of the base ring 1, thereby adjusting the height of the bearing structure.

[0039] In some embodiments, the support block 704 is a stepped arc-shaped block, and the thickness of the support block 704 gradually decreases from the edge of the support ring 701 toward the center as the distance from the center of the support ring 701 decreases.

[0040] Specifically, the support block 704 is a stepped arc-shaped block. The arc-shaped block can adapt to the edge shape of the base ring 1. The end of the arc-shaped block away from the base ring 1 is stepped. Multiple steps gradually decrease from the edge of the base ring 1 towards the center of the base ring 1, which can more accurately adjust the height of the bearing structure.

[0041] In some embodiments, the top of the base ring 1 is provided with a spring assembly 2, a support 3 and a thrust 4 from bottom to top. The spring assembly 2 is connected to the base ring 1 by bolts. A boss 5 is provided between the spring assembly 2 and the adjacent spring assembly 2. The boss 5 is connected to the base ring 1. A spacer block 604 is provided at the bottom of the boss 5. One end of the spacer block 604 abuts against one side of the inner surface of the adjacent support 3.

[0042] Specifically, the spring assembly 2 is connected to the top of the base ring 1 by bolts, and the top of the spring assembly 2 is connected to the bearing 3. A boss 5 is set between the two spring assemblies 2, and the boss 5 is fixed to the base ring 1 by bolts. The spring assembly 2 plays an elastic buffering role and can realize the autonomous adjustment of the bearing 3 and the thrust bearing 4.

[0043] In some embodiments, the spacer 604 is a T-shaped block, the ends of which abut against the inner surfaces of two adjacent trowels 3.

[0044] Specifically, one end of the T-shaped block is a T-tail, and the other end is a T-head. One end of the T-tail has a crossbeam perpendicular to the axial direction of the T-shaped block. Both ends of the crossbeam overlap with one side of the inner surface of two adjacent tile 3s. One end of the T-head extends towards the outer surface of the tile 3. The T-shaped block, through the crossbeam of the T-tail, limits the movement of the tile 3. This improved connection strength between the spacer block 604 and the tile 3 prevents the tile 3 from moving.

[0045] In some embodiments, the top of the thrust pad 3 is provided with a protrusion, and the bottom of the thrust pad 4 is provided with a groove. The protrusion and the groove cooperate to limit the position of the thrust pad 4 by the thrust pad 3.

[0046] According to an embodiment of the present invention, the hydro-generator includes a thrust bearing structure.

[0047] The technical advantages of the hydro-generator according to the embodiments of the present invention are the same as those of the above-described hydro-generator thrust bearing structure, and will not be repeated here.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A structure of a thrust bearing of a hydraulic generator characterized by comprising: The base ring is provided with a first sliding groove on the outer surface, a sliding groove on the inner surface, two first limiting grooves on the outer surface of the supporting shoe, a second limiting groove on the outer surface of the thrust shoe, and a limiting sliding groove on the inner surface of the thrust shoe. The first outer baffle is fixed on the outer surface of the base ring by bolts, and the second outer baffle is fixed on the outer surface of the supporting shoe by bolts. The threaded sleeve is fixed on the outer surface of the supporting ring at equal intervals in the circumferential direction. The supporting block is a stepped arc-shaped block, and the thickness of the supporting block gradually decreases in the direction from the edge of the supporting ring to the center, with the distance to the center of the supporting ring decreasing.

2. The hydrogenerator thrust bearing structure according to claim 1, characterized in that The top of the base ring is sequentially provided with a spring assembly, a supporting shoe and a thrust shoe from bottom to top, the spring assembly is connected with the base ring by bolts, a boss is arranged between the spring assembly and the adjacent spring assembly, the boss is connected with the base ring, and a spacing block is arranged at the bottom of the boss, one end of the spacing block abuts against one side of the inner surface of the adjacent two supporting shoes.

3. The hydrogenerator thrust bearing structure according to claim 1, characterized in that The thrust bearing structure is the water turbine generator thrust bearing structure according to any one of claims 1 to 6.

4. The hydrogenerator thrust bearing structure according to claim 1, characterized in that ​ 5. The hydrogenerator thrust bearing structure according to claim 1, characterized in that ​ 6. The hydrogenerator thrust bearing structure according to claim 1, characterized in that ​ 7. A hydroelectric generator characterized by ​

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