CN116123138A - High-power variable-amplitude variable-speed pump - Google Patents
High-power variable-amplitude variable-speed pump Download PDFInfo
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- CN116123138A CN116123138A CN202310060835.5A CN202310060835A CN116123138A CN 116123138 A CN116123138 A CN 116123138A CN 202310060835 A CN202310060835 A CN 202310060835A CN 116123138 A CN116123138 A CN 116123138A
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- guide vane
- impeller
- blade
- movable guide
- variable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
- F04D29/245—Geometry, shape for special effects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Hydraulic Turbines (AREA)
Abstract
The invention discloses a high-power variable-amplitude variable-speed pump, which belongs to the technical field of water pumps and comprises a pumping chamber, an impeller, a rotating shaft and a water inlet pipe, wherein the impeller is symmetrical around the rotating shaft, and is characterized in that: still include movable guide vane and fixed guide vane, fixed guide vane and movable guide vane all set up in the pumping chamber, and movable guide vane distributes in the periphery of impeller, and movable guide vane makes the rotary motion of aperture change regulation around the rotation axis, and fixed guide vane distributes in movable guide vane's periphery, and the impeller includes upper cover plate, lower apron and blade, and the blade thickness cross-section is eccentric tadpole type and distributes, and the import of impeller links to each other with the export of inlet tube, and the export of impeller links to each other with the import of movable guide vane. According to the invention, the movable guide vanes and the impellers with specific structures are additionally arranged, so that the whole impeller can adapt to the change of fluid under different powers, the power adjusting range of the variable speed pump is greatly increased, and the application of a wind-solar water storage multifunctional complementary system is facilitated.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to a high-power variable-amplitude variable-speed pump.
Background
The purpose of the water pump operation is to transport water from one location to another, or to increase the pressure to convert motive mechanical energy into water energy. The working principle of the water pump is as follows: after the water pump is started, the impeller rotates at a high speed in the pump body, liquid in the pump body rotates along with the impeller, the liquid is thrown out by the impeller at the outlet under the action of centrifugal force, the thrown-out liquid gradually slows down in the diffusion chamber of the pump body, after the liquid is thrown out, a vacuum low-pressure area is formed at the center of the impeller, and the liquid in the liquid pool flows into the water pump through the water inlet pipe under the action of external atmospheric pressure. The volume of the pump body diffusion chamber is constant, the pressure is gradually increased along with the increase of the thrown water, and finally the water is discharged from the extrusion chamber of the water pump. The liquid is thus continuously sucked up from the lower reservoir and then continuously pumped out of the pumping chamber to the upper reservoir.
Wind power and photovoltaic power generation have randomness, the power generation amount changes from 0KW to full power generation state in one day, the influence of weather is very large, and the fluctuation of the power generation amount can cause great potential safety hazard to a power grid. In order to build a new power system, a high proportion of renewable energy sources must be accessed. The existing variable-speed energy storage pump has small power amplitude and small power, and cannot meet the requirement of rapid development of new energy.
The Chinese patent document with the bulletin number of CN214741837U and the bulletin day of 2021, 11 and 16 discloses an underwater vacuum energy storage peak shaving system adopting a reversible water pump water turbine, which is characterized by comprising an offshore wind turbine unit and an underwater vacuum energy storage system; the offshore wind power generator unit comprises an offshore wind power generator, and an offshore wind power generator outgoing line is connected with a power grid through a transformer; the underwater vacuum energy storage system comprises a reversible water pump water turbine motor connected to a power grid, the reversible water pump water turbine motor is connected with the reversible water pump water turbine, the reversible water pump water turbine is arranged inside a concrete vacuum energy storage device, a main water inlet pipe connected with an external seawater environment is installed in the concrete vacuum energy storage device, the main water inlet pipe is connected with a water diversion pipe installed inside the concrete vacuum energy storage device through a water diversion main control valve, and the water diversion pipe is connected with the reversible water pump water turbine.
The underwater vacuum energy storage peak shaving system adopting the reversible energy storage pump water turbine disclosed in the patent document has the advantages that the reversible energy storage pump water turbine is influenced by working conditions, the input force cannot be adjusted in real time to match the output force of wind power, photovoltaic and continuous change of a water head, the power adjusting range is small, and the application of the wind-light-water storage multifunctional complementary system cannot be realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the high-power variable-amplitude variable-speed pump, and the movable guide vane and the impeller with a specific structure are additionally arranged, so that the whole impeller can adapt to the change of fluid under different powers, the power adjusting range of the variable-speed pump is greatly increased, and the application of a wind-solar water storage multifunctional complementary system is facilitated.
The invention is realized by the following technical scheme:
the utility model provides a high-power variable-amplitude variable-speed pump, includes pumping chamber, impeller, rotation axis and inlet tube, and the impeller is located the middle part in the pumping chamber, and the impeller is around rotation axis symmetry, its characterized in that: still include movable guide vane and fixed guide vane, fixed guide vane and movable guide vane all set up in the pumping chamber, movable guide vane distributes in the periphery of impeller, and movable guide vane is around rotation axis symmetric distribution, and movable guide vane makes the rotary motion that the aperture was changed and was adjusted around the rotation axis, fixed guide vane distributes in the periphery of movable guide vane, the impeller includes upper cover plate, lower apron and connects the blade between upper cover plate and the lower apron, blade thickness cross-section is eccentric tadpole type and distributes, the import of impeller links to each other with the export of inlet tube, and the export of impeller links to each other with the import of movable guide vane.
The thickness section of the blade is distributed in an eccentric tadpole mode, specifically, the head of the blade is in an eccentric arc curve, the thickness deviation is 5% -30%, and the thickness is gradually changed.
The blade comprises a head part and a tail part, and the tail part of the blade is a crescent curve.
The thickness of the head part of the blade is larger than that of the tail part of the blade.
The middle thickness of the blade is in straight line transition.
The blade comprises a pressure surface and a suction surface, wherein the pressure surface is positioned on one side of the blade, and the suction surface is positioned on the other side of the blade.
The pressure surface of the head area of the blade is 5% -30% thicker than the suction surface.
The beneficial effects of the invention are mainly shown in the following aspects:
1. according to the invention, the fixed guide vanes and the movable guide vanes are arranged in the pumping chamber, the movable guide vanes are distributed on the periphery of the impeller, the movable guide vanes are symmetrically distributed around the rotating shaft, the movable guide vanes perform rotation motion with opening degree changing adjustment around the rotating shaft, the fixed guide vanes are distributed on the periphery of the movable guide vanes, the impeller comprises an upper cover plate, a lower cover plate and blades connected between the upper cover plate and the lower cover plate, the thickness section of each blade is distributed in an eccentric tadpole manner, the inlet of the impeller is connected with the outlet of the water inlet pipe, and the outlet of the impeller is connected with the inlet of the movable guide vanes.
2. According to the variable speed pump, the movable guide vanes are arranged between the fixed guide vanes and the impeller and symmetrically distributed around the rotating shaft, the movable guide vanes can rotate around the rotating shaft to perform opening change adjustment, compared with the existing pump structure, the variable speed pump has the function of controlling flow by changing opening change, so that the variable speed pump can stably flow fluid under different working conditions, the integral performance of the variable speed pump is effectively improved, the flow-lift line is optimized, the hump characteristic is improved, and the stable operation of the unit is ensured.
3. Compared with a conventional impeller, the impeller has the advantages that the curvature is small, the wrap angle is small, the tail part is straight or oblique, the head part is thinner, and the thickness of the impeller is smaller, so that the impeller has the characteristics of large curvature and large wrap angle compared with the characteristics of symmetrical distribution of the folded wires, and has high hump margin, high efficiency and high cavitation performance.
4. According to the invention, through realizing the function of the ultra-high power amplitude variation range, the variable speed pump can absorb electric energy with fluctuation characteristics generated by wind power and photovoltaic new energy, and through reasonable proportioning of pump capacity and wind power and photovoltaic capacity, the effect of absorbing the new energy to generate electric energy is achieved, so that the electricity discarding rate of wind power and photovoltaic can be effectively reduced.
5. According to the invention, through the improvement of cavitation performance, the required suction height is only 1/3 of the required suction height of the variable-speed pumped storage unit, the excavation amount is greatly reduced, the construction cost of a pump station is directly saved by 20% -30%, and the service life of the unit is prolonged.
6. According to the invention, through realizing the function of the ultra-high power amplitude variation range, the stress can be continuously adjusted to match the output of continuously changing photovoltaic, so that the application of the wind-solar energy storage multifunctional complementary system can be better realized.
7. According to the invention, through realizing the function of the ultra-high power amplitude variation range, the stored water energy is converted into water electricity by utilizing a hydroelectric generating set and is transmitted to a power grid, or the long-distance water transmission is realized by utilizing gravitational potential energy, so that the problems of electricity and water consumption in the desert area are solved.
8. According to the invention, through realizing the function of the ultra-high power amplitude variation range, the electric energy generated by wind power and photovoltaic is absorbed in a large scale, so that the stability of a power grid is protected, and the impact of fluctuating electric energy generated by new energy on the power grid is reduced.
9. According to the invention, through realizing the function of the ultra-high power amplitude variation range, the electric energy generated by wind power and photovoltaic is absorbed in a large scale, the electric energy is converted into the potential energy of water, the water level of a reservoir is raised, the operation range of a conventional hydroelectric generating set is optimized, the power generation efficiency of the conventional hydroelectric generating set is improved, and the safety and stability of the generating set are enhanced.
10. The invention can access to the isolated network for operation through realizing the function of the ultra-high power amplitude variation range, is suitable for high-frequency variation and large-water-level amplitude variation environments, and keeps the safety and stability of the unit.
Drawings
The invention will be further described in detail with reference to the drawings and detailed description, wherein:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a movable vane structure according to the present invention;
FIG. 3 is a schematic view of the impeller structure of the present invention;
FIG. 4 is a schematic view of a blade strand according to the present invention;
FIG. 5 is a schematic view of a vane structure according to the present invention;
the marks in the figure: 1. the device comprises a water pressing chamber, 2, a fixed guide vane, 3, a movable guide vane, 4, an impeller, 5, a water inlet pipe, 6, blades, 7, an upper cover plate, 8, a lower cover plate, 9, blade strands, 10, a head part, 11, a tail part, 12, a pressure surface, 13, a suction surface, 14 and a rotating shaft.
Detailed Description
Example 1
Referring to fig. 1-3, a high-power variable-amplitude variable-speed pump comprises a pumping chamber 1, an impeller 4, a rotating shaft 14 and a water inlet pipe 5, wherein the impeller 4 is positioned in the middle of the pumping chamber 1, the impeller 4 is symmetrical around the rotating shaft 14, the variable-amplitude variable-speed pump further comprises a movable guide vane 3 and a fixed guide vane 2, the fixed guide vane 2 and the movable guide vane 3 are both arranged in the pumping chamber 1, the movable guide vane 3 is distributed on the periphery of the impeller 4, the movable guide vane 3 is symmetrically distributed around the rotating shaft 14, the movable guide vane 3 performs opening variable-adjustment rotary motion around the rotating shaft 14, the fixed guide vane 2 is distributed on the periphery of the movable guide vane 3, the impeller 4 comprises an upper cover plate 7, a lower cover plate 8 and a blade 6 connected between the upper cover plate 7 and the lower cover plate 8, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the inlet of the impeller 4 is connected with the outlet of the water inlet pipe 5, and the outlet of the impeller 4 is connected with the inlet of the movable guide vane 3.
Compared with the prior art, the embodiment is the most basic implementation mode, and the movable guide vane 3 and the impeller 4 with a specific structure are additionally arranged, so that the whole impeller 4 can adapt to the change of fluid under different powers, the power adjusting range of the variable speed pump is greatly increased, and the application of a wind, light and water storage multi-energy complementary system is facilitated.
Taking 30 KW capacity of a single machine as an example, the conventional variable speed pump can only reach 10% -30% of power adjusting range under different lifts, but the invention can increase the power adjusting range to 40% -60%, and the optimal efficiency of the real machine is improved to 94.13% compared with that of the conventional variable speed pump, and the lifting amount is 1.07%.
Example 2
Referring to fig. 1-3, a high-power variable-amplitude variable-speed pump comprises a pumping chamber 1, an impeller 4, a rotating shaft 14 and a water inlet pipe 5, wherein the impeller 4 is positioned in the middle of the pumping chamber 1, the impeller 4 is symmetrical around the rotating shaft 14, the variable-amplitude variable-speed pump further comprises a movable guide vane 3 and a fixed guide vane 2, the fixed guide vane 2 and the movable guide vane 3 are both arranged in the pumping chamber 1, the movable guide vane 3 is distributed on the periphery of the impeller 4, the movable guide vane 3 is symmetrically distributed around the rotating shaft 14, the movable guide vane 3 performs opening variable-adjustment rotary motion around the rotating shaft 14, the fixed guide vane 2 is distributed on the periphery of the movable guide vane 3, the impeller 4 comprises an upper cover plate 7, a lower cover plate 8 and a blade 6 connected between the upper cover plate 7 and the lower cover plate 8, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the inlet of the impeller 4 is connected with the outlet of the water inlet pipe 5, and the outlet of the impeller 4 is connected with the inlet of the movable guide vane 3.
The thickness and section of the blade 6 are distributed in an eccentric tadpole mode, specifically, the head 10 of the blade 6 is in an eccentric arc curve, the thickness deviation is 5%, and the thickness is gradually changed.
The embodiment is a preferred implementation manner, through additionally arranging the movable guide vane 3, the movable guide vane 3 is arranged between the fixed guide vane 2 and the impeller 4 and symmetrically distributed around the rotating shaft 14, the movable guide vane 3 can rotate around the rotating shaft 14 to perform opening change adjustment, compared with the existing pump structure, the movable guide vane 3 plays a role in controlling flow through changing opening change, so that fluid flow of the variable speed pump is stable under different working conditions, the overall performance of the variable speed pump is effectively improved, the flow-lift line is optimized, hump characteristics are improved, and stable operation of the unit is ensured.
Example 3
Referring to fig. 1-4, a high-power variable-amplitude variable-speed pump comprises a pumping chamber 1, an impeller 4, a rotating shaft 14 and a water inlet pipe 5, wherein the impeller 4 is positioned in the middle of the pumping chamber 1, the impeller 4 is symmetrical around the rotating shaft 14, the variable-amplitude variable-speed pump further comprises a movable guide vane 3 and a fixed guide vane 2, the fixed guide vane 2 and the movable guide vane 3 are both arranged in the pumping chamber 1, the movable guide vane 3 is distributed on the periphery of the impeller 4, the movable guide vane 3 is symmetrically distributed around the rotating shaft 14, the movable guide vane 3 performs opening variable-adjustment rotary motion around the rotating shaft 14, the fixed guide vane 2 is distributed on the periphery of the movable guide vane 3, the impeller 4 comprises an upper cover plate 7, a lower cover plate 8 and a blade 6 connected between the upper cover plate 7 and the lower cover plate 8, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the inlet of the impeller 4 is connected with the outlet of the water inlet pipe 5, and the outlet of the impeller 4 is connected with the inlet of the movable guide vane 3.
Further, the thickness section of the blade 6 is distributed in an eccentric tadpole shape, specifically, the head 10 of the blade 6 is in an eccentric arc curve, the thickness deviation is 10%, and the thickness is gradually changed.
The blade 6 comprises a head portion 10 and a tail portion 11, and the tail portion 11 of the blade 6 is in a crescent curve.
In this embodiment, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the curvature of the blade is smaller than that of a conventional impeller 4, the wrap angle is smaller, the tail 11 is straight or oblique, the thickness of the head 10 is thinner, and the blade strand 9 has the characteristics of large curvature and large wrap angle when the strand is symmetrically distributed, so that the impeller 4 has high hump margin, high efficiency and high cavitation performance.
Through the realization of super high-power amplitude variation range function, variable speed pump can absorb wind-powered electricity generation and photovoltaic new forms of energy and produce the electric energy of fluctuation characteristic, through reasonable pump capacity and wind-powered electricity generation and photovoltaic capacity's ratio, reaches the absorption new forms of energy and produces the electric energy to can effectively reduce wind-powered electricity generation and photovoltaic and abandon the electric rate.
Example 4
Referring to fig. 1-5, a high-power variable-amplitude variable-speed pump comprises a pumping chamber 1, an impeller 4, a rotating shaft 14 and a water inlet pipe 5, wherein the impeller 4 is positioned in the middle of the pumping chamber 1, the impeller 4 is symmetrical around the rotating shaft 14, the variable-amplitude variable-speed pump further comprises a movable guide vane 3 and a fixed guide vane 2, the fixed guide vane 2 and the movable guide vane 3 are both arranged in the pumping chamber 1, the movable guide vane 3 is distributed on the periphery of the impeller 4, the movable guide vane 3 is symmetrically distributed around the rotating shaft 14, the movable guide vane 3 performs opening variable-adjustment rotary motion around the rotating shaft 14, the fixed guide vane 2 is distributed on the periphery of the movable guide vane 3, the impeller 4 comprises an upper cover plate 7, a lower cover plate 8 and a blade 6 connected between the upper cover plate 7 and the lower cover plate 8, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the inlet of the impeller 4 is connected with the outlet of the water inlet pipe 5, and the outlet of the impeller 4 is connected with the inlet of the movable guide vane 3.
The thickness and section of the blade 6 are distributed in an eccentric tadpole mode, specifically, the head 10 of the blade 6 is in an eccentric arc curve, the thickness deviation is 15%, and the thickness is gradually changed.
The blade 6 comprises a head portion 10 and a tail portion 11, and the tail portion 11 of the blade 6 is in a crescent curve.
The thickness of the head portion 10 of the blade 6 is greater than the thickness of the tail portion 11 of the blade 6.
The middle thickness of the blade 6 is in straight line transition.
In this embodiment, the cavitation performance is improved, the required suction height is only 1/3 of the suction height required by the variable-speed pumped storage unit, the excavation amount is greatly reduced, the construction cost of a pump station is directly saved by 20% -30%, and the service life of the unit is prolonged.
Example 5
Referring to fig. 1-5, a high-power variable-amplitude variable-speed pump comprises a pumping chamber 1, an impeller 4, a rotating shaft 14 and a water inlet pipe 5, wherein the impeller 4 is positioned in the middle of the pumping chamber 1, the impeller 4 is symmetrical around the rotating shaft 14, the variable-amplitude variable-speed pump further comprises a movable guide vane 3 and a fixed guide vane 2, the fixed guide vane 2 and the movable guide vane 3 are both arranged in the pumping chamber 1, the movable guide vane 3 is distributed on the periphery of the impeller 4, the movable guide vane 3 is symmetrically distributed around the rotating shaft 14, the movable guide vane 3 performs opening variable-adjustment rotary motion around the rotating shaft 14, the fixed guide vane 2 is distributed on the periphery of the movable guide vane 3, the impeller 4 comprises an upper cover plate 7, a lower cover plate 8 and a blade 6 connected between the upper cover plate 7 and the lower cover plate 8, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the inlet of the impeller 4 is connected with the outlet of the water inlet pipe 5, and the outlet of the impeller 4 is connected with the inlet of the movable guide vane 3.
The thickness and section of the blade 6 are distributed in an eccentric tadpole mode, specifically, the head 10 of the blade 6 is in an eccentric arc curve, the thickness deviation is 25%, and the thickness is gradually changed.
The blade 6 comprises a head portion 10 and a tail portion 11, and the tail portion 11 of the blade 6 is in a crescent curve.
The thickness of the head portion 10 of the blade 6 is greater than the thickness of the tail portion 11 of the blade 6.
The middle thickness of the blade 6 is in straight line transition.
Further, the blade 6 comprises a pressure surface 12 and a suction surface 13, the pressure surface 12 being located on one side of the blade 6 and the suction surface 13 being located on the other side of the blade 6.
The embodiment is a further preferred implementation mode, and the application of the wind-solar energy storage multi-energy complementary system can be better realized by realizing the function of the ultra-high power amplitude variation range and continuously adjusting the stress to match the output of continuously changing photovoltaic.
Through the realization of the function of the ultra-high power amplitude variation range, the stored water energy is converted into water and electricity by utilizing a hydroelectric unit and is conveyed to a power grid or the long-distance water conveying is realized by utilizing gravitational potential energy, so that the problems of electricity and water consumption in desert areas are solved.
Example 6
Referring to fig. 1-5, a high-power variable-amplitude variable-speed pump comprises a pumping chamber 1, an impeller 4, a rotating shaft 14 and a water inlet pipe 5, wherein the impeller 4 is positioned in the middle of the pumping chamber 1, the impeller 4 is symmetrical around the rotating shaft 14, the variable-amplitude variable-speed pump further comprises a movable guide vane 3 and a fixed guide vane 2, the fixed guide vane 2 and the movable guide vane 3 are both arranged in the pumping chamber 1, the movable guide vane 3 is distributed on the periphery of the impeller 4, the movable guide vane 3 is symmetrically distributed around the rotating shaft 14, the movable guide vane 3 performs opening variable-adjustment rotary motion around the rotating shaft 14, the fixed guide vane 2 is distributed on the periphery of the movable guide vane 3, the impeller 4 comprises an upper cover plate 7, a lower cover plate 8 and a blade 6 connected between the upper cover plate 7 and the lower cover plate 8, the thickness section of the blade 6 is distributed in an eccentric tadpole mode, the inlet of the impeller 4 is connected with the outlet of the water inlet pipe 5, and the outlet of the impeller 4 is connected with the inlet of the movable guide vane 3.
The thickness and section of the blade 6 are distributed in an eccentric tadpole mode, specifically, the head 10 of the blade 6 is in an eccentric arc curve, the thickness deviation is 30%, and the thickness is gradually changed.
The blade 6 comprises a head portion 10 and a tail portion 11, and the tail portion 11 of the blade 6 is in a crescent curve.
The thickness of the head portion 10 of the blade 6 is greater than the thickness of the tail portion 11 of the blade 6.
The middle thickness of the blade 6 is in straight line transition.
The blade 6 comprises a pressure surface 12 and a suction surface 13, the pressure surface 12 being located on one side of the blade 6 and the suction surface 13 being located on the other side of the blade 6.
The pressure side 12 is 30% thicker than the suction side 13 in the region of the head 10 of the blade 6.
The embodiment is an optimal implementation mode, and the electric energy generated by wind power and photovoltaic is absorbed in a large scale through the realization of the function of the ultra-high power amplitude variation range, so that the stability of a power grid is protected, and the impact of fluctuating electric energy generated by new energy on the power grid is reduced.
Through the realization of the function of the ultra-high power amplitude variation range, the electric energy generated by wind power and photovoltaic is absorbed on a large scale, the electric energy is converted into the potential energy of water, the water level of a reservoir is raised, the operation range of a conventional hydroelectric generating set is optimized, the power generation efficiency of the conventional hydroelectric generating set is improved, and the safety and stability of the generating set are enhanced.
The device can be connected into a isolated network for operation through the realization of the function of the ultra-high power amplitude variation range, is suitable for high-frequency variation and large-water-level amplitude variation environments, and keeps the safety and stability of the unit.
The basic principle of the invention is as follows:
the power change range of the variable speed pump can be increased by adding the movable guide vane 3 to the conventional variable speed pump, and a larger power amplitude target is realized by innovative design of the conventional impeller 4, so that the adaptation to the characteristics of large output amplitude of wind power and photovoltaic is realized.
Compared with a conventional variable speed pump, the ultra-high power variable amplitude variable speed pump structure is added with a movable guide vane 3 structure, so that the speed change range is enlarged; aiming at an ultra-large variable-amplitude variable-speed pump, an impeller 4 with excellent hump and cavitation performance is developed; the impeller 4 is composed of an upper cover plate 7, a lower cover plate 8 and blades 6 connected between the upper cover plate 7 and the lower cover plate 8, wherein the blade strand wires 9 have multiple curvatures and large wrap angles, the tail 11 of each blade 6 adopts a crescent curve, and the thickness of each blade 6 is distributed in an eccentric tadpole manner, so that a variable speed pump with ultra-high power amplitude is realized.
Claims (7)
1. The utility model provides a high-power variable-amplitude variable-speed pump, includes pumping chamber (1), impeller (4), rotation axis (14) and inlet tube (5), and impeller (4) are located the middle part in pumping chamber (1), and impeller (4) are around rotation axis (14) symmetry, its characterized in that: still include movable guide vane (3) and fixed guide vane (2), fixed guide vane (2) and movable guide vane (3) all set up in pressurized-water chamber (1), movable guide vane (3) distribute in the periphery of impeller (4), and movable guide vane (3) are around rotation axis (14) symmetric distribution, and movable guide vane (3) are around rotation axis (14) do the rotary motion that the aperture was changed and is adjusted, fixed guide vane (2) distribute in the periphery of movable guide vane (3), impeller (4) include upper cover plate (7), lower apron (8) and connect blade (6) between upper cover plate (7) and lower apron (8), blade (6) thickness cross-section is eccentric tadpole and distributes, the import of impeller (4) links to each other with the export of inlet tube (5), and the export of impeller (4) links to each other with the import of movable guide vane (3).
2. A high power variable-amplitude pump as claimed in claim 1, wherein: the thickness section of the blade (6) is distributed in an eccentric tadpole mode, specifically, the head (10) of the blade (6) is in an eccentric arc curve, the thickness deviation is 5% -30%, and the thickness is gradually changed.
3. A high power variable-amplitude pump as claimed in claim 1, wherein: the blade (6) comprises a head part (10) and a tail part (11), and the tail part (11) of the blade (6) is in a crescent curve.
4. A high power variable amplitude pump as claimed in claim 3, wherein: the thickness of the head part (10) of the blade (6) is larger than that of the tail part (11) of the blade (6).
5. A high power variable-amplitude pump as claimed in claim 1, wherein: the middle thickness of the blade (6) is in straight line transition.
6. A high power variable-amplitude pump as claimed in claim 1, wherein: the blade (6) comprises a pressure surface (12) and a suction surface (13), wherein the pressure surface (12) is positioned on one side of the blade (6), and the suction surface (13) is positioned on the other side of the blade (6).
7. A high power variable amplitude pump as claimed in claim 6, wherein: the pressure surface (12) of the head (10) region of the blade (6) is 5% -30% thicker than the suction surface (13).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310060835.5A CN116123138A (en) | 2023-01-17 | 2023-01-17 | High-power variable-amplitude variable-speed pump |
| PCT/CN2023/139111 WO2024152817A1 (en) | 2023-01-17 | 2023-12-15 | Large-power-variable-amplitude variable-speed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310060835.5A CN116123138A (en) | 2023-01-17 | 2023-01-17 | High-power variable-amplitude variable-speed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116123138A true CN116123138A (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310060835.5A Pending CN116123138A (en) | 2023-01-17 | 2023-01-17 | High-power variable-amplitude variable-speed pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116123138A (en) |
| WO (1) | WO2024152817A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024152815A1 (en) * | 2023-01-17 | 2024-07-25 | 东方电气集团东方电机有限公司 | Wind/solar/hydro/storage hybrid system |
| WO2024152817A1 (en) * | 2023-01-17 | 2024-07-25 | 东方电气集团东方电机有限公司 | Large-power-variable-amplitude variable-speed pump |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH215738A (en) * | 1940-03-26 | 1941-07-15 | Escher Wyss Maschf Ag | Centrifugal pump with adjustable guide vanes. |
| JP6758924B2 (en) * | 2016-06-01 | 2020-09-23 | 株式会社クボタ | Impeller |
| CN110454310B (en) * | 2019-08-07 | 2021-04-27 | 东方电气集团东方电机有限公司 | Bionics hydraulic turbine |
| CN110701110A (en) * | 2019-10-30 | 2020-01-17 | 江苏大学 | Volute type centrifugal pump with movable guide vanes |
| CN113266504A (en) * | 2021-05-17 | 2021-08-17 | 西安理工大学 | Mixed-flow water turbine with bionic tadpole-shaped blades |
| CN115912432A (en) * | 2023-01-17 | 2023-04-04 | 东方电气集团东方电机有限公司 | Wind, light and water storage multi-energy complementary system |
| CN116123138A (en) * | 2023-01-17 | 2023-05-16 | 东方电气集团东方电机有限公司 | High-power variable-amplitude variable-speed pump |
-
2023
- 2023-01-17 CN CN202310060835.5A patent/CN116123138A/en active Pending
- 2023-12-15 WO PCT/CN2023/139111 patent/WO2024152817A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024152815A1 (en) * | 2023-01-17 | 2024-07-25 | 东方电气集团东方电机有限公司 | Wind/solar/hydro/storage hybrid system |
| WO2024152817A1 (en) * | 2023-01-17 | 2024-07-25 | 东方电气集团东方电机有限公司 | Large-power-variable-amplitude variable-speed pump |
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| Publication number | Publication date |
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| WO2024152817A1 (en) | 2024-07-25 |
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