CN216077392U - Oil-free rotating wheel for hydropower station - Google Patents
Oil-free rotating wheel for hydropower station Download PDFInfo
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- CN216077392U CN216077392U CN202121135742.7U CN202121135742U CN216077392U CN 216077392 U CN216077392 U CN 216077392U CN 202121135742 U CN202121135742 U CN 202121135742U CN 216077392 U CN216077392 U CN 216077392U
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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
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Abstract
The utility model discloses an oilless rotating wheel for a hydropower station, which is provided with a paddle and comprises an operation frame, a transmission shaft and operation frame limiting sliding blocks, wherein the transmission shaft is connected with one end of the operation frame; the transmission shaft sequentially consists of a rotating wheel, a water machine shaft, a motor shaft and a blade servomotor; each section of the transmission shaft is provided with a radial supporting slide block; each section the transmission shaft adopts the half-divided snap ring with the key groove to sleeve and connect, so as to prevent the transmission shafts from rotating relatively. The utility model has the beneficial effect that after the runner is transformed without oiling, the water pollution event caused by oil leakage of the runner of the unit is thoroughly avoided. Is more harmonious to social environment, green, safe and energy-saving.
Description
Technical Field
The utility model relates to the technical field of key devices in hydroelectric power generation, in particular to an oilless rotating wheel of a hydropower station.
Background
The Baisha hydropower station in the city of Quejie is the fifth level of six steps for Suizjiang dry flow development and planning, and is located in the Baisha 5 kilometers upstream of the city of the City of the Quejie. Dam site control watershed area 6456km2Average flow rate of 217.95m for many years3And s. 2 8500kW GZTF08-WP-550 units of the existing power station installation machine, the rated water head is 5.5m, and the rated flow is 178.13m3And/s, rated rotation speed of 78.9rpm, and unit center installation height of 2.8 m. The maximum water head of the power station is 7.0m, the minimum water head is 3.67m, and the average weighted water head is 5.5 m. The average generating capacity of the power station in the design year is 7110 thousands of kWh, and the utilization time of the design year is 4182 h.
Through statistics, the average power generation amount of the power station in 2009-2019 actually calculated for many years is 7181 ten thousand kWh, and the power station is utilized for 4224h in actual years. The tail water of the power station is a water taking point of a drinking water source of the four-party city, and the drinking water safety of the four-party people needs to be guaranteed. Through many years of operation, the unit has serious oil leakage due to the sealing failure of the blades, the speed regulator oil pump is frequently started, a large amount of service power is consumed, and the drinking water source is polluted.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide an oilless rotating wheel for a hydropower station. The power station discovers from the comparison of practical performance and economic performance indexes that the conventional oil-supply head still exists when replacing the conventional rotating wheel, and the problems of oil leakage, oil channeling, floating tile burning, oil pipe operation fracture and the like frequently exist due to the complex structure and the difficulty in sealing, the center of the oil pipe operation is difficult to adjust, the installation and maintenance difficulty is high, and the barring always consumes several days. The running time of hub oil in the runner body is long, and the hidden trouble that the blade leaks oil to pollute the environment after being sealed and worn exists. From the perspective of energy conservation, efficiency improvement and green safety, a high-oil-pressure adjustable-pitch rotating wheel is selected to reform a hydraulic generator rotating wheel of a power station.
The operating oil pressure of the high-oil-pressure blade-adjusting type rotating wheel is increased to 16MPa from the original 2.5MPa, and the blade servomotor is arranged at the shaft end of the generator from the inside and the outside of the hub body, so that the structure of the rotating wheel of the water turbine is simplified, and the overcurrent capacity and the energy index of the rotating wheel can be improved. Meanwhile, the novel high-pressure high-speed rotary sealing joint device is used in a matched manner to replace a traditional oil supply head, so that the unit runner is in an internal oil-free state in operation, the environmental pollution to rivers caused by the oil leakage of the runner is thoroughly avoided, and the problem that the oil pump of the oil pressure device is frequently started due to the oil leakage of the runner is also solved. In addition, a servomotor and a high-pressure high-speed rotating joint of the high-oil-pressure blade-adjusting type rotating wheel are integrally processed in a factory, the concentricity of a servomotor cylinder and a main shaft only needs to be checked by a jigger when the servomotor and the high-pressure high-speed rotating joint are firstly installed on site, and a hinge positioning pin is drilled after the concentricity is qualified; the pin is used for positioning during subsequent maintenance, and the secondary turning is not needed.
To further illustrate the advantages of the present invention, it should be noted that the oil inside the runner of the conventional feathering hydro-generator is mainly divided into: the hub oil used for lubricating the copper rings of the connecting pins of the paddle operating mechanism in the hub and keeping the internal and external pressures of the hub balanced and the hydraulic oil used for operating the action of the paddle servomotor are two parts. In order to ensure that the rotating wheel of the propeller-rotating unit does not have oil, and the target requirement is used as guidance, the following matters can be clearly solved:
1. the lubricating mode of each connecting pin shaft copper ring of the paddle operating mechanism needs to be changed;
2. the structure form of the blade seal is required to be changed to prevent external water from entering the hub to cause equipment corrosion;
3. the operation mode of the rotation of the paddle needs to be changed, the traditional paddle servomotor is internally arranged and is externally arranged, and the paddle is operated by adopting a transmission shaft;
4. designing a matched blade servomotor and an oil receiver thereof;
5. the matched paddle opening degree adjusting oil pressure device, the adjuster and the opening degree feedback device.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an oilless rotating wheel for a hydropower station is provided with paddles and comprises an operation frame, a transmission shaft connected with one end of the operation frame and operation frame limiting sliding blocks, wherein the number of the operation frame limiting sliding blocks is the same as that of the paddles; the transmission shaft sequentially consists of a rotating wheel, a water machine shaft, a motor shaft and a blade servomotor; each section of the transmission shaft is provided with a radial supporting slide block; each section the transmission shaft adopts the half-divided snap ring with the key groove to sleeve and connect, so as to prevent the transmission shafts from rotating relatively.
Preferably, the blade servomotor is arranged in front of the shaft end of the generator and rotates synchronously with the shaft end of the generator; the hydraulic oil transmission device is characterized by further comprising a high-speed high-pressure rotating joint, a rotating shaft of the high-speed high-pressure rotating joint and a blade servomotor cylinder are matched in a vehicle, a blade servomotor stroke feedback rod penetrates out of a central through hole of the rotating shaft, and a blade servomotor switch cavity oil way through hole is drilled in the rotating shaft and transmits hydraulic oil to the servomotor switch cavity.
Preferably, the system further comprises a 16MPa energy storage type complete hydraulic turbine speed regulator device and a blade opening feedback sensor so as to control the blade opening in a closed loop mode.
Preferably, the outer thrust shaft sleeve, the inner shaft sleeve, the rotating arm shaft sleeve, the ear pin shaft sleeve and the transmission shaft sleeve of the pivot are graphite-based self-lubricating copper sleeves.
Preferably, the water-cooled wheel further comprises a polyurethane XV-type seal with a constant pressure spring, wherein the bottom layer is provided with the constant pressure spring and a backing ring, the middle part is provided with the X-type seal, and the outer layer is provided with 2 layers of V-type seals and a pressure plate to prevent water in a flow channel from entering the wheel hub.
The utility model has the beneficial effects that:
1. after transformation, the oil consumption of the speed regulator blade of the original unit is 2.5m3Reduced to 0.8m3The oil for the hydraulic turbine governor is replaced every two years, and about 0.85m of L-HM46# antiwear hydraulic oil can be saved every year3；
2. Before transformation, an oil pump of an oil pressure device of an original unit speed regulator is started once in about 30 minutes, and the oil pump runs for 8 minutes each time; after the transformation, the oil pump of the speed regulator oil pressure device is started once in about 4 hours, and the operation is carried out for 5 minutes each time. The average number of hours of use of the unit over the years is 4224 hours. The oil pump motor of the unit speed governor is 18.5KW, and the electricity saving amount per year is 18.5 x (((4224 x 60 ÷ 30 x 8 ÷ 60) - (4224 ÷ 4 x 5 ÷ 60)) ═ 19210.4 KWh;
3. after the 16MPa high-pressure energy storage type speed regulator is used in a complete set, the original medium-pressure air system can be cancelled, the air supply for the oil pressure device of the speed regulator is not needed any more, and the routine maintenance workload of the original medium-pressure air system is reduced;
4. the conventional oil-supply head unit needs one routine inspection maintenance and floating tile replacement after running for about 8000 hours, the maintenance and overhaul period of the oil-supply head needs 7-10 days, and the maintenance cost is 6-8 ten thousand yuan each time; after the high-speed high-pressure rotary joint is adopted to replace the traditional oil supply head, the operation time can be prolonged to 15000-;
5. after the runner is transformed without oiling, the water pollution event caused by the oil leakage of the runner of the unit is thoroughly avoided. Is more harmonious to social environment, green, safe and energy-saving.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a transmission shaft according to the present invention;
FIG. 3 is a schematic view of a blade seal structure of the present invention;
fig. 4 is a schematic structural view of the sealing cap of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
As shown in figure 1, the utility model relates to an oil-free rotating wheel for a hydropower station, which is provided with paddles and comprises an operation frame 1, a transmission shaft 2 connected with one end of the operation frame 1 and operation frame limiting sliding blocks 3, wherein the number of the operation frame limiting sliding blocks 3 is the same as that of the paddles; the transmission shaft 2 consists of a rotating wheel, a water machine shaft 100, a motor shaft 200 and a blade servomotor in sequence; each section of the transmission shaft 2 is provided with a radial supporting slide block respectively; each section the transmission shaft 2 adopts a half-divided snap ring sleeve 9 with a key groove to connect, so that the transmission shafts 2 are prevented from rotating relatively.
Preferably, the blade servomotor is arranged in front of the shaft end of the generator and rotates synchronously with the shaft end of the generator; the hydraulic oil transmission device is characterized by further comprising a high-speed high-pressure rotating joint, a rotating shaft of the high-speed high-pressure rotating joint and a blade servomotor cylinder are matched in a vehicle, a blade servomotor stroke feedback rod penetrates out of a central through hole of the rotating shaft, and a blade servomotor switch cavity oil way through hole is drilled in the rotating shaft and transmits hydraulic oil to the servomotor switch cavity.
Preferably, the system further comprises a 16MPa energy storage type complete hydraulic turbine speed regulator device and a blade opening feedback sensor so as to control the blade opening in a closed loop mode.
As shown in figure 1, the outer pivot thrust shaft sleeve 7, the inner pivot shaft sleeve 8, the rotating arm shaft sleeve 4, the ear pin shaft sleeve 6 and the transmission shaft sleeve 5 are graphite-based self-lubricating copper sleeves.
As shown in fig. 3, the hub further comprises a polyurethane XV-type seal with a constant pressure spring, wherein the bottom layer is the constant pressure spring 10 and the backing ring 11, the middle layer is the X-type seal 12, and the outer layer is provided with 2 layers of V-type seals 13 and a pressure plate 14 to prevent water in the flow channel from entering the hub.
Examples
Replacing copper sleeves (an outer thrust shaft sleeve, an inner shaft sleeve, a rotating arm shaft sleeve, an ear handle pin shaft sleeve and a transmission shaft sleeve) of pin shafts at each connecting position of the paddle operating mechanism with graphite-based self-lubricating copper sleeves;
the original XV type rubber seal is changed into polyurethane XV type seal with constant pressure spring, the bottom layer is constant pressure spring and backing ring, the middle layer is X type seal, the outer layer is provided with 2 layers of V type seal and pressing plate, preventing water of flow passage from entering the wheel hub;
the original piston and the original oil pipe of the paddle servomotor are changed into an operation frame and a transmission shaft, and an operation frame limiting slide block is added to prevent the operation frame from rotating along with the transmission shaft to enable a rotating arm of the paddle to be stressed; the quantity of the sliding blocks is consistent with that of the blades of the paddle, and the lug pins are staggered. The transmission shaft is segmented according to a rotating wheel, a water machine shaft, a motor shaft and a paddle servomotor of the machine set, radial supporting slide blocks of the transmission shaft of each segment are required to be arranged because the water machine shaft of the white sand power station is inconsistent with an inner hole of the motor shaft, the slide blocks are graphite-based copper alloy slide blocks, the slide blocks are fastened on the transmission shaft by bolts, the outer diameter machining size is consistent with the inner hole of the water machine (motor) shaft, and the matching tolerance is f 7. Each section of transmission shaft is connected in a manner of half-split snap ring sleeves with key grooves, the transmission shafts are prevented from rotating relatively, the inner hole of each snap ring sleeve is machined to be consistent with the shaft diameter of each transmission shaft, the matching tolerance is H8/f7, and the machining matching tolerance of each snap ring groove is K7/K6.
The paddle servomotor is arranged in front of the generator shaft end and rotates along with the generator shaft, the hydraulic pressure of the paddle relay operation is improved to 16MPa by referring to the maturity of the current domestic complete hydraulic oil cylinder used in the hydraulic generator, the size of the paddle servomotor can be reduced better, the arrangement in a bulb body is convenient, and the stroke of the servomotor is consistent with that of the original set of paddle servomotor. The high-speed high-pressure rotary joint applied to the aerospace industry replaces an oil receiver of a traditional water turbine, a rotating shaft of the high-speed high-pressure rotary joint and a blade servomotor cylinder are matched in a same vehicle, a blade servomotor stroke feedback rod penetrates out of a central through hole of the rotating shaft, and an oil passage through hole of a blade servomotor switch cavity is drilled on the rotating shaft to transmit hydraulic oil to the servomotor switch cavity.
The device is matched with a 16MPa energy storage type complete hydraulic turbine speed regulator device produced by each speed regulator manufacturer at present and a paddle opening degree feedback sensor so as to control the paddle opening degree in a closed loop manner. It should be noted that the replaced paddle speed regulator needs to be matched with the original speed regulator, the guide curve and the paddle water head-opening degree co-connection curve of the original speed regulator can be led into the paddle speed regulator, the guide vane opening degree and the water head feedback signal are accessed, the paddle speed regulator is enabled to control the paddle opening degree to automatically follow the water head and the guide vane opening degree, and the original speed regulator can also directly control the paddle speed regulator to follow the guide vane opening degree. If necessary, the guide vane servomotor can be replaced in a matched manner, and the opening degrees of the guide vanes and the blades are all controlled by a new energy storage type complete set water turbine speed regulator; the use amount of hydraulic oil of a speed regulator system of the rotary-paddle water-turbine generator set and the subsequent maintenance workload are reduced.
The white sand hydropower station is a bulb tubular turbine generator set with a double-fulcrum single-cantilever structure, and the collecting ring is arranged in a tubular base of the generator set, does not interfere with a new blade adjusting mechanism and does not need to be adjusted. However, the installation positions of the sealing cover of the original thrust bearing and the supporting seat of the blade adjusting mechanism are mutually interfered, and the sealing cover needs to be additionally designed.
As shown in fig. 4, the connection surface between the mirror plate of the original unit and the motor shaft is not provided with a seal, and after modification, the possibility that the unit is polluted by the leakage of the lubricating oil of the thrust bearing of the unit exists, and the mirror plate 15 needs to be chamfered and turned by 5.1mm at a 45-degree angle at the seam allowance where the mirror plate 15 is connected with the motor shaft, and a phi 450 × 4.0 nitrile rubber seal ring 16 is added to prevent the leakage of the lubricating oil of the bearing from polluting the unit.
The inner holes of the motor shaft and the water shaft of the original unit are filled with turbine oil, and after modification, a layer of fully-synthesized composite aluminum-based grease needs to be coated on the inner holes of the motor shaft and the water shaft to prevent the interior of the shaft hole from being oxidized and rusted. After the unit runner does not have the oiling transformation, when the runner assembly, scribble the compound calcium base fat of one deck (or the compound aluminium base fat of total synthesis) with the exposed metal component in the wheel hub, its effect does: the internal oxidation corrosion of the runner hub is prevented, and the equipment can be effectively prevented from being corroded due to the excellent adhesion capability and the good water resistance even if the sealing of the blade fails.
The blade adjusting device after transformation rotates along with the main shaft of the unit and is installed in a bulb body of the unit, and when the routine inspection or debugging is carried out, a worker needs to pass by the blade adjusting device and must be provided with an isolation protective cover to prevent the worker from being twisted by selected equipment. The isolation shield is preferably integrally arranged with the staircase, the platform, etc. in the bulb body.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (5)
1. An oilless rotating wheel for a hydropower station is provided with a paddle and is characterized by comprising an operation frame, a transmission shaft connected with one end of the operation frame and operation frame limiting sliding blocks, wherein the number of the operation frame limiting sliding blocks is the same as that of blades of the paddle; the transmission shaft sequentially consists of a rotating wheel, a water machine shaft, a motor shaft and a blade servomotor; each section of the transmission shaft is provided with a radial supporting slide block; each section the transmission shaft adopts the half-divided snap ring with the key groove to sleeve and connect, so as to prevent the transmission shafts from rotating relatively.
2. The oiling-free wheel of claim 1, wherein the paddle servomotor is forward of the generator shaft end and rotates synchronously with the generator shaft; the hydraulic oil transmission device is characterized by further comprising a high-speed high-pressure rotating joint, a rotating shaft of the high-speed high-pressure rotating joint and a blade servomotor cylinder are matched in a vehicle, a blade servomotor stroke feedback rod penetrates out of a central through hole of the rotating shaft, and a blade servomotor switch cavity oil way through hole is drilled in the rotating shaft and transmits hydraulic oil to the servomotor switch cavity.
3. The oiling-free runner in a hydropower station of claim 1, further comprising a 16MPa energy storage type packaged hydro turbine governor device and a paddle opening feedback sensor for closed-loop control of the paddle opening.
4. The oiling-free runner of claim 1, wherein the outer thrust sleeve, the inner sleeve, the rocker arm sleeve, the ear pin sleeve and the propeller shaft sleeve are graphite-based self-lubricating copper sleeves.
5. The oiling-free runner of claim 1, further comprising a polyurethane XV-type seal with constant pressure spring, wherein the bottom layer is constant pressure spring and backing ring, the middle part is X-type seal, the outer layer is provided with 2 layers of V-type seal and pressure plate to prevent water in the runner from entering the hub.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121135742.7U CN216077392U (en) | 2021-05-25 | 2021-05-25 | Oil-free rotating wheel for hydropower station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121135742.7U CN216077392U (en) | 2021-05-25 | 2021-05-25 | Oil-free rotating wheel for hydropower station |
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| CN216077392U true CN216077392U (en) | 2022-03-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279891A (en) * | 2021-05-25 | 2021-08-20 | 广东省源天工程有限公司 | Oil-free rotating wheel for hydropower station |
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2021
- 2021-05-25 CN CN202121135742.7U patent/CN216077392U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279891A (en) * | 2021-05-25 | 2021-08-20 | 广东省源天工程有限公司 | Oil-free rotating wheel for hydropower station |
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