CN221373775U - Top cover structure for bearing thrust load of hydroelectric generating set - Google Patents
Top cover structure for bearing thrust load of hydroelectric generating set Download PDFInfo
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- CN221373775U CN221373775U CN202322824034.XU CN202322824034U CN221373775U CN 221373775 U CN221373775 U CN 221373775U CN 202322824034 U CN202322824034 U CN 202322824034U CN 221373775 U CN221373775 U CN 221373775U
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- 239000013013 elastic material Substances 0.000 claims description 3
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- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 241000412565 Argentina sphyraena Species 0.000 description 1
- AILDTIZEPVHXBF-UHFFFAOYSA-N Argentine Natural products C1C(C2)C3=CC=CC(=O)N3CC1CN2C(=O)N1CC(C=2N(C(=O)C=CC=2)C2)CC2C1 AILDTIZEPVHXBF-UHFFFAOYSA-N 0.000 description 1
- 235000016594 Potentilla anserina Nutrition 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Hydraulic Turbines (AREA)
Abstract
The utility model relates to a top cover structure for bearing thrust load of a hydroelectric generating set, which is characterized by comprising the following components: an inner top cover, the outer profile of which has a conical structure; the outer top cover is arranged between the inner top cover and the seat ring, and the inner top cover is matched with the outer top cover; the thrust cone is arranged at the bottom of the thrust bearing, a manhole is arranged on the thrust cone, and the thrust cone is arranged at the top of the inner top cover. The utility model has the advantages that the inner top cover has good rigidity and small deformation; and the inner top cover has large supporting inner space, which is beneficial to the sealing maintenance of the water guide bearing and the main shaft.
Description
Technical Field
The utility model relates to the technical field of water turbines, in particular to a top cover structure for bearing thrust load of a water turbine generator set.
Background
The thrust bearing of the large and medium axial flow type hydroelectric generating set mostly adopts a generator lower frame supporting mode. The supporting mode is that the thrust load of the hydroelectric generating set acting on the thrust bearing is transmitted to the concrete around the pit through the lower frame. The support structure has the advantages of larger size, poor rigidity, heavier weight, inconvenient maintenance of the thrust bearing and consideration of the installation height of the lower frame in factory building design. In order to reduce the height of a factory building and save civil engineering cost, the thrust bearing of the axial flow type hydroelectric generating set produced by foreign manufacturers adopts a top cover supporting mode. The top cover supporting mode is to transfer the thrust load of the hydroelectric generating set acting on the thrust bearing to the concrete around the pit through the top cover. But domestic research in this respect is late and use is less effective.
Disclosure of utility model
The utility model provides a top cover structure for bearing thrust load of a hydroelectric generating set, which adopts an inner top cover with a conical structure, and has the advantages of good rigidity and small deformation; and the inner top cover has large supporting inner space, which is beneficial to the maintenance of the water guide bearing and the main shaft seal.
The utility model provides the following technical scheme: a roof structure for carrying thrust loads of a hydro-generator set, comprising:
An inner top cover, the outer profile of which has a conical structure;
The outer top cover is arranged between the inner top cover and the seat ring, and the inner top cover is matched with the outer top cover;
The thrust cone is arranged at the bottom of the thrust bearing, a manhole is arranged on the thrust cone, and the thrust cone is arranged at the top of the inner top cover. The inner top cover has a conical structure, the inner top cover adopts a conical structure, the thrust cone is arranged on the inner top cover, and the inner top cover provides support for the thrust cone. The thrust cone adopts a conical welding structure, and is provided with a manhole, so that the sealing installation and maintenance of the water guide bearing and the main shaft are facilitated. The outer contour of the inner top cover adopts a cone shape, and has the advantages of good rigidity and small deformation when being subjected to external force. The thrust cone is of a hollow structure, a cavity is formed in the thrust cone, the cavity is used for overhauling, and the manhole is connected with the cavity. The scheme can effectively reduce the height of the factory building and save the civil engineering cost.
Further, the inner top cover and the outer top cover are connected through a connecting piece, and the connecting piece is a bolt. The inner and outer top covers adopt a welding structure and are connected into a whole through bolts. The inner top cover and the outer top cover form a whole and then are clamped on the main shaft and are arranged on the concrete base, so that the whole stability of the thrust bearing is facilitated, and the critical rotating speed and the axial natural frequency of the thrust bearing are improved.
Further, the outer top cover is fixed on the seat ring through a connecting piece, and the connecting piece is a bolt group. Several bolts and connecting pieces form a bolt group, and the bolt group enables the outer top cover to be fixed on the seat ring. The bolts of the bolts are always fixed on the concrete base.
Furthermore, an adjusting pad is arranged between the inner top cover and the thrust cone, and the adjusting pad is made of elastic materials. An adjusting pad is arranged between the inner top cover and the thrust cone for adjusting the contact surface level of the thrust cone and the thrust bearing.
Further, the inner header is concentric with the outer header. The inner top cover and the outer top cover are of a round structure conventionally, and the round top cover is less in material consumption than other graphic top covers with the same side length and does not need to consider angles. The inner top cover and the outer top cover are annular, the inner top cover and the outer top cover are concentric, the stability of the overall mechanical property of the top cover is guaranteed, and the concrete base is easy to pour.
Further, the contact surface of the thrust cone and the thrust bearing is in the horizontal direction. The contact surface is horizontal, so that the thrust bearing can be ensured to be stable, the pressure intensity of the contact surface is smaller, the service life of the water turbine is long, and the maintenance times are less.
Further, the inner cap provides support for the thrust cone. The top cover supporting mode is to transfer the thrust load of the hydroelectric generating set acting on the thrust bearing to the concrete around the pit through the top cover. The vertical load of the thrust bearing part is transmitted to the concrete foundation through the thrust cone, the inner top cover, the outer top cover and the seat ring.
Further, the thrust bearing is provided with a protruding main shaft, and the main shaft is arranged in the cavity inside the thrust cone. The outer side of the main shaft is provided with a thrust bearing, a thrust cone, a manhole, an adjusting pad and an inner top cover in sequence from top to bottom.
The utility model has the following advantages.
(1) The inner top cover with the conical structure has good rigidity and small deformation.
(2) The inner top cover has large supporting inner space, which is beneficial to the sealing maintenance of the water guide bearing and the main shaft.
(3) Effectively reduces the height of the factory building and saves the civil engineering cost.
(4) The rigidity supporting strength is improved, the critical rotation speed of the shaft is improved, and the natural frequency of the shaft is improved.
(5) Facilitating the stability of the shaft.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a top cover structure for carrying thrust load of a hydro-generator set.
Fig. 2 is an enlarged view of a top cover structure for carrying thrust load of a hydro-generator set according to the present utility model.
In the figure: the device comprises a 1-thrust bearing, a 2-thrust cone, a 3-manhole tongue, a 4-adjusting pad, a 5-inner top cover, a 6-outer top cover, a 7-seat ring, an 8-contact surface, a 9-main shaft and a 10-concrete foundation.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
The utility model will be further described with reference to the following examples, which are given in connection with the accompanying drawings.
Embodiment 1-2 shows, the embodiment of the utility model provides a top cover structure for bearing thrust load of a hydroelectric generating set, which comprises a 1-thrust bearing, a 2-thrust cone, a 3-manhole tongue, a 4-adjusting pad, a 5-inner top cover, a 6-outer top cover, a 7-seat ring, an 8-contact surface, a 9-main shaft and a 10-concrete foundation.
An embodiment is shown in fig. 1-2, and proposes a top cover structure for bearing thrust load of a hydro-generator set according to the following technical scheme, including:
An inner top cover, the outer profile of which has a conical structure;
The outer top cover is arranged between the inner top cover and the seat ring, and the inner top cover is matched with the outer top cover;
The thrust cone is arranged at the bottom of the thrust bearing, a manhole is arranged on the thrust cone, and the thrust cone is arranged at the top of the inner top cover. The inner top cover has a conical structure, the inner top cover adopts a conical structure, the thrust cone is arranged on the inner top cover, and the inner top cover provides support for the thrust cone. The thrust cone adopts a conical welding structure, and is provided with a manhole, so that the sealing installation and maintenance of the water guide bearing and the main shaft are facilitated. The outer contour of the inner top cover adopts a cone shape, and has the advantages of good rigidity and small deformation when being subjected to external force. The thrust cone is of a hollow structure, a cavity is formed in the thrust cone, the cavity is used for overhauling, and the manhole is connected with the cavity. The scheme can effectively reduce the height of the factory building and save the civil engineering cost.
Preferably, the inner top cover and the outer top cover are connected through a connecting piece, and the connecting piece is a bolt. The inner and outer top covers adopt a welding structure and are connected into a whole through bolts. The inner top cover and the outer top cover form a whole body which is arranged on the concrete base, thereby being beneficial to the whole stability of the thrust bearing and improving the critical rotation speed and the natural frequency of the shaft.
Preferably, the outer top cover is fixed on the seat ring through a connecting piece, and the connecting piece is a bolt group. Several bolts and connecting pieces form a bolt group, and the bolt group enables the outer top cover to be fixed on the seat ring. The bolts of the bolts are always fixed on the concrete base.
Preferably, an adjusting pad is arranged between the inner top cover and the thrust cone, and the adjusting pad is made of elastic materials. An adjusting pad is arranged between the inner top cover and the thrust cone for adjusting the contact surface level of the thrust cone and the thrust bearing.
Preferably, the inner head cover is concentric with the outer head cover. The inner top cover and the outer top cover are of a round structure conventionally, and the round top cover is less in material consumption than other graphic top covers with the same side length and does not need to consider angles. The inner top cover and the outer top cover are annular, the inner top cover and the outer top cover are concentric, the stability of the overall mechanical property of the top cover is guaranteed, and the concrete base is easy to pour.
Preferably, the contact surface of the thrust cone and the thrust bearing is in a horizontal direction. The contact surface is horizontal, so that the thrust bearing can be ensured to be stable, the pressure intensity of the contact surface is smaller, the service life of the water turbine is long, and the maintenance times are less.
Preferably, the inner head provides support for the thrust cone. The top cover supporting mode is to transfer the thrust load of the hydroelectric generating set acting on the thrust bearing to the concrete around the pit through the top cover. The vertical load of the thrust bearing part is transmitted to the concrete foundation through the thrust cone, the inner top cover, the outer top cover and the seat ring.
Preferably, the thrust bearing is provided with a protruding main shaft, and the inner top cover is fixed on the outer side of the main shaft; the spindle is disposed in the thrust cone interior cavity. The outer side of the main shaft is provided with a thrust bearing, a thrust cone, a manhole, an adjusting pad and an inner top cover in sequence from top to bottom.
In the second embodiment, as shown in fig. 1-2, the following technical scheme is proposed: a top cover structure for bearing thrust load of a hydroelectric generating set.
The embodiment mainly comprises an outer top cover, an inner top cover with a conical structure, a thrust cone, an adjusting pad and the like. The inner and outer top covers adopt a welding structure and are connected into a whole through bolts; the inner top cover adopts a conical structure, the thrust cone is arranged on the inner top cover, and the inner top cover provides support for the thrust cone; the thrust cone adopts a conical welding structure, and is provided with a manhole, so that the sealing installation and maintenance of the water guide bearing and the main shaft are facilitated; an adjusting pad is arranged between the inner top cover and the thrust cone for adjusting the contact surface level of the thrust cone and the thrust bearing; the vertical load of the thrust bearing part is transmitted to the concrete foundation through the thrust cone, the inner top cover, the outer top cover and the seat ring.
In order to reduce the height of a factory building and save civil engineering cost, the thrust bearing of the axial flow type hydroelectric generating set produced by foreign manufacturers adopts a top cover supporting mode. The top cover supporting mode is to transfer the thrust load of the hydroelectric generating set acting on the thrust bearing to the concrete around the pit through the top cover. But domestic research in this respect is late and use is less effective. Some international projects, such as the tagatomstan glafuna engineering and the argentine provincial project, require that the thrust bearings be top cover supported. The structure of the patent is formed through careful research and finite element analysis calculation, and is successfully applied to Tajiketan Gravuna technology improvement engineering, the engineering unit generates electricity, and the vibration swing degree of the engineering unit is superior to the international standard.
The water turbine (hydroturbine) is a power machine which converts the energy of water flow into rotary mechanical energy, and belongs to the turbine machinery in the fluid machinery. As early as 100 years before the first 100 hours of the metric elements, the Chinese model of a water turbine, namely a water wheel, appears, and is used for lifting and filling and driving grain processing equipment. Modern water turbines are mostly installed in hydropower stations to drive generators for generating electricity. In a hydropower station, water in an upstream reservoir is guided to a water turbine through a water guide pipe to push a water turbine runner to rotate so as to drive a generator to generate electricity. The water after doing work is discharged downstream through the tail water pipe. The higher the head and the higher the flow, the greater the output power of the turbine.
The water pump turbine is mainly used for a pumped storage power station. When the load of the power system is lower than the basic load, the power system can be used as a water pump, and the surplus power generation capacity is utilized to pump water from a downstream water reservoir to an upstream water reservoir so as to store energy in a potential energy form; when the system load is higher than the base load, the system can be used as a water turbine to generate electricity to regulate peak load. Therefore, the pure pumped storage power station cannot increase the electric quantity of the electric power system, but can improve the operation economy of the thermal generator set and the total efficiency of the electric power system. For 50 s, pumped storage units are widely valued and rapidly developed in countries around the world. The early-developed or very high-head pumped storage unit mostly adopts three machines, namely, is formed by connecting a generator motor, a water turbine and a water pump in series. The water turbine and the water pump are respectively designed, so that the water turbine and the water pump have higher efficiency, and the rotation directions of the water pump are the same when generating electricity and pumping water, so that the water pump can be quickly converted from generating electricity to pumping water or from pumping water to generating electricity. Meanwhile, the water turbine can be utilized to start the unit. Its advantages are high cost and high investment in power station. The blades of the diagonal flow pump turbine runner can rotate, and still have good running performance when the water head and load change, but are limited by hydraulic characteristics and material strength, and the highest water head of the diagonal flow pump turbine runner is only 136.2 meters (Gao Gendi a power station in Japan) until the beginning of the 80 s. For higher heads, mixed flow pump turbines are required. The pumped storage power station is provided with an upper reservoir and a lower reservoir. Under the condition of storing the same energy, the lifting head can be increased to reduce the storage capacity, increase the rotating speed of the unit and reduce the construction cost. Therefore, high head energy storage power stations above 300 meters are rapidly developing. For the 20 th century, hydroelectric generating sets have been developed to high parameters and large capacities. Along with the increase of thermal power capacity and the development of nuclear power in an electric power system, in order to solve the problem of reasonable peak shaving, a pumped storage power station is being actively built in the world except for the major water system development or the large-scale power station expansion, so that a water pump turbine is rapidly developed. In order to fully utilize various hydraulic resources, even in plain rivers with very low tides and fall, and even waves, the like are widely paid attention to, so that through-flow turbines and other small units are rapidly developed.
The object of the present utility model is fully effectively achieved by the above-described embodiments. Those skilled in the art will appreciate that the present utility model includes, but is not limited to, those illustrated in the drawings and described in the foregoing detailed description. While the utility model has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the utility model is not limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
Claims (7)
1. A roof structure for carrying thrust loads of a hydro-generator set, comprising:
An inner top cover, the outer profile of which has a conical structure;
The outer top cover is arranged between the inner top cover and the seat ring, and the inner top cover is matched with the outer top cover;
The thrust cone is arranged at the bottom of the thrust bearing, a manhole is arranged on the thrust cone, and the thrust cone is arranged at the top of the inner top cover;
An adjusting pad is arranged between the inner top cover and the thrust cone, and the adjusting pad is made of elastic materials.
2. The roof structure for carrying thrust load of a hydro-generator set according to claim 1, wherein the inner roof and the outer roof are connected by a connecting member, and the connecting member is a bolt.
3. The roof structure for carrying thrust load of a hydro-generator set according to claim 2, wherein the outer roof is fixed to the seat ring by a connecting member, and the connecting member is a bolt set.
4. The roof structure for carrying thrust loads of a hydro-generator set as defined by claim 1 wherein said inner roof is concentric with said outer roof.
5. The roof structure for carrying thrust load of a hydro-generator set according to claim 1, wherein the thrust cone and thrust bearing contact surface is in a horizontal direction.
6. The roof structure for carrying thrust loads of a hydro-generator set as defined by claim 5 wherein the inner roof provides support for a thrust cone.
7. A top cover structure for bearing thrust load of a hydroelectric generating set according to claim 1 or 5, wherein the thrust bearing is provided with a protruding main shaft; the spindle is disposed in the thrust cone interior cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322824034.XU CN221373775U (en) | 2023-10-20 | 2023-10-20 | Top cover structure for bearing thrust load of hydroelectric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322824034.XU CN221373775U (en) | 2023-10-20 | 2023-10-20 | Top cover structure for bearing thrust load of hydroelectric generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221373775U true CN221373775U (en) | 2024-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322824034.XU Active CN221373775U (en) | 2023-10-20 | 2023-10-20 | Top cover structure for bearing thrust load of hydroelectric generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221373775U (en) |
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2023
- 2023-10-20 CN CN202322824034.XU patent/CN221373775U/en active Active
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