CN112746986B - Composite blade structure capable of adjusting diameter of short blade - Google Patents
Composite blade structure capable of adjusting diameter of short blade Download PDFInfo
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- CN112746986B CN112746986B CN202110090086.1A CN202110090086A CN112746986B CN 112746986 B CN112746986 B CN 112746986B CN 202110090086 A CN202110090086 A CN 202110090086A CN 112746986 B CN112746986 B CN 112746986B
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- Prior art keywords
- short
- blade
- impeller
- blades
- diameter
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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
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0055—Rotors with adjustable blades
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a composite blade structure capable of adjusting the diameter of a short blade. The impeller center is provided with an impeller center cavity, a plurality of short and long blades are arranged on the impeller, the number of the short and long blades is the same, the short and long blades are arranged alternately at intervals in the circumferential direction, the short and long blades are arranged in the radial direction, a blade adjusting mechanism is arranged in the impeller center cavity, the impeller center cavity is provided with a plurality of radial channels, the blade adjusting mechanism radially penetrates through the radial channels and is connected with the short blades, and the blade adjusting mechanism comprises a fixing plate, a shaft connected with a motor, a center wheel, a planet wheel, a transmission gear, an inner meshing gear, a fixing mechanism and a coarse rack; the blade adjusting mechanism drives the short blade to move radially so as to adjust the diameter. The invention controls the movement of the rack through the rotation of the motor, thereby realizing the change of the diameter of the short blade of the impeller connected with the rack, further reducing the pressure pulsation and increasing the flow and the lift of the centrifugal pump.
Description
Technical Field
The invention relates to a centrifugal pump impeller structure, in particular to an adjusting structure for adjusting the diameter of a short blade of a composite blade.
Background
A centrifugal pump is a fluid machine for transporting a liquid, which converts electric energy input by an electric motor into kinetic energy of the transported liquid. When the centrifugal pump is started, the pump shaft drives the impeller to rotate at a high speed, the impeller rotates to generate centrifugal force to drive liquid to move radially from the center of the impeller to the outer circumference, and the liquid flows through the volute casing and enters a pressure pipeline of the centrifugal pump.
The short splitter blades can improve the efficiency and cavitation resistance of the centrifugal pump and prevent the occurrence of flow stall. And the splitter vane is beneficial to reducing the inlet pressure of the impeller and improving the outlet pressure of the volute, thereby improving the lift of the pump. The different outer diameters of the splitter blades produce different pressure pulsations that are too great to produce vibration noise.
Accordingly, there is a need for improvements in the art.
Disclosure of Invention
The invention aims to provide a structure for adjusting short blades in a composite impeller of a centrifugal pump, which is used for solving the problems in the background technology.
The technical scheme adopted by the invention is as follows:
the invention comprises an impeller, long blades, short blades, an impeller central cavity and a blade adjusting mechanism; the impeller center is provided with an impeller center cavity, the impeller is provided with a plurality of short blades and a plurality of long blades, the number of the short blades and the number of the long blades are the same, the short blades and the long blades are alternately arranged along the circumferential direction, each short blade and each long blade are arranged along the radial direction, a blade adjusting mechanism is arranged in the impeller center cavity, the impeller center cavity is provided with a plurality of radial channels along the circumferential direction, the blade adjusting mechanism penetrates through the radial channels and the short blades to be connected, and the blade adjusting mechanism drives the short blades to move in the radial direction so as to adjust the diameter.
The blade adjusting mechanism comprises a fixed plate, a shaft connected with a motor, a central wheel, a planet wheel, a transmission gear, an inner meshing gear, a fixed mechanism and a coarse rack; the fixed plate is fixed in the impeller center cavity, the shaft connected with the motor is installed in the center of the fixed plate, the shaft penetrates through the fixed plate and then is coaxially and fixedly connected with the center of the central wheel, the periphery of the central wheel is meshed with an inner gear ring of an inner meshing gear through a plurality of planet wheels, the number of the planet wheels is the same as that of short blades, each planet wheel is coaxially connected with a transmission gear through a transmission shaft, the transmission shaft is hinged to the fixed plate, a fixing mechanism is arranged beside each transmission gear, the fixing mechanism is provided with a sliding side groove which is radially arranged along the impeller, a coarse rack is slidably embedded in the sliding side groove, and the outer end of the coarse rack is fixedly connected with the short blades after penetrating through a radial channel.
The upper groove wall and the lower groove wall of the sliding side groove are provided with sliding grooves, sliding convex strips are arranged on the upper surface and the lower surface of the coarse rack, and the sliding convex strips are embedded in the sliding grooves, so that the coarse rack is slidably arranged in the sliding side groove.
The convex blocks are fixed on the inner end side and the outer end side of the fixing mechanism along the radial direction and used for limiting the movement of the coarse rack in the sliding side groove of the fixing mechanism.
Still include the jump ring, the jump ring install in the below of planet wheel, connect in the transmission shaft.
The number of the radial channels is the same as that of the short blades.
And a shaft sleeve is sleeved on the transmission shaft between the planet wheel and the transmission gear.
The fixing mechanism is fixed on the fixing plate through a fixing straight rod in a welding mode.
The blade adjusting mechanism mainly comprises an epicyclic gear train, a central wheel is connected with a long shaft, a motor drives the long shaft to rotate, and the long shaft drives the central wheel to rotate; the central wheel rotates to enable the planet wheel meshed with the central wheel to rotate; the outer side of the planet wheel is provided with an internal gear which enables each planet wheel to rotate simultaneously, the planet wheel rotates to enable a transmission gear coaxial with the planet wheel to rotate, and the transmission gear rotates to enable a thick rack to move radially, so that the short blade connected with the thick rack moves radially, and the purpose of changing the diameter of the short blade is achieved.
The invention has the beneficial effects that:
the impeller for the centrifugal pump can control the movement of the rack through the rotation of the motor, so that the diameter of the short blade of the impeller connected with the rack is changed.
The centrifugal pump of the invention can adjust the diameter of the short blade in the impeller in real time during the operation process, thereby reducing the pressure pulsation and increasing the flow and the lift of the centrifugal pump.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a top view of the present invention;
FIG. 2 is a perspective view of the internal structure of the impeller of the present invention;
FIG. 3 is a front view of the structure of FIG. 2;
FIG. 4 is a front view of the securing mechanism;
FIG. 5 is a perspective view of the rack;
FIG. 6 is a perspective view of a gear drive configuration;
FIG. 7 is a connection view of the short blades.
In the figure: the device comprises an impeller 1, an impeller 2, a long blade 3, a short blade 4, an impeller central cavity 5, a blade adjusting mechanism 6, a fixing plate 7, a shaft connected with a motor 8, a central wheel 9, a planet wheel 10, a transmission gear 11, an internal meshing gear 12, a fixing mechanism 13, a thick rack 14, a lug 14, a shaft sleeve 15, a sliding convex strip 16, a fastening bolt 17, a gasket 18, a transmission shaft 19, a snap spring 20, a fixing straight rod 21, a sliding groove 22 and a bearing 23.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention is further elucidated with reference to the drawings.
As shown in fig. 1, the impeller comprises an impeller 1, long blades 2, short blades 3, an impeller central cavity 4 and a blade adjusting mechanism 5; impeller center cavity 4 is seted up at impeller 1 center, impeller center cavity 4 and impeller 1 receive external force to rotate together, impeller 1 is global to be arranged a plurality of short blades 3 and a plurality of long blade 2, short blade 3 is the same with long blade 2 quantity and along circumference interval alternative arrangement, impeller 1 is last to have four short blades 3 and four long blade 2 in the concrete implementation, every short blade 3 and long blade 2 all radially arrange, install blade adjustment mechanism 5 in impeller center cavity 4, a plurality of radial passageways are seted up along circumference to impeller center cavity 4, the quantity of radial passageway is the same with short blade 3's quantity, blade adjustment mechanism 5 radially passes radial passageway and short blade 3 connects, blade adjustment mechanism 5 drives short blade 3 radial movement and then adjusts the diameter.
As shown in fig. 2 and 3, the vane adjusting mechanism includes a fixed plate 6, a shaft 7 connected with the motor, a central wheel 8, a planetary wheel 9, a transmission gear 10, an internal gear 11, a fixed mechanism 12, and a coarse rack 13; the fixed plate 6 is fixedly welded in the central cavity 4 of the impeller, and the fixed plate is circumferentially welded in the central cavity of the impeller; a shaft 7 connected with a motor is movably installed in the center of a fixed plate 6, the shaft 7 is connected with an output end of the motor in the concrete implementation, the shaft 7 penetrates through the fixed plate 6 and then is fixedly connected with the center of a central wheel 8 in a coaxial mode, the periphery of the central wheel 8 is meshed with an inner gear ring of an inner gear ring 11 through a plurality of planet wheels 9, the inner gear ring 11 can rotate, the number of the planet wheels 9 is the same as that of the short blades 3, as shown in fig. 6, each planet wheel 9 is coaxially connected with one transmission gear 10 through a transmission shaft 19, a shaft sleeve 15 is sleeved on a transmission shaft 19 between each planet wheel 9 and the transmission gear 10, the transmission shaft 19 is supported and hinged on the fixed plate 6 through a bearing 23, and the fixed plate 6 is connected with the transmission shaft 19 through the bearing 23, so that the transmission shaft 19 can rotate on the fixed plate 6. The upper end of a transmission shaft 19 penetrates out of the transmission gear 10 and then is connected with a fastening bolt 17 and a gasket 18, the transmission gear 10 is axially sleeved and pressed on the transmission shaft 19, a fixing mechanism 12 is arranged beside each transmission gear 10, the fixing mechanism 12 is fixed on the fixing plate 6 through a fixing straight rod 21 in a welding mode, a sliding side groove which is arranged along the radial direction of the impeller 1 is formed in the fixing mechanism 12, a coarse rack 13 is embedded in the sliding side groove in a sliding mode, the outer end of the coarse rack 13 penetrates through a radial channel and then is fixedly connected with the short blades 3, and as shown in figure 7, the coarse rack 13 and the short blades 3 move in the radial channel. The thick rack is thus connected to the short blade and makes the same radial movement.
As shown in fig. 4 and 5, the upper groove wall and the lower groove wall of the sliding side groove are provided with sliding grooves 22, sliding convex strips 16 are arranged on the upper surface and the lower surface of the coarse rack 13, and the sliding convex strips 16 are embedded in the sliding grooves 22, so that the coarse rack 13 is slidably arranged in the sliding side groove.
As shown in fig. 5, the rough rack 13 has a protrusion 14 fixed on the inner and outer end side surfaces of the fixing mechanism 12 in the radial direction, and the protrusion 14 is used for limiting the movement of the rough rack 13 in the sliding side groove of the fixing mechanism 12 and limiting the radial movement distance of the rack.
The sliding ribs 16 of the coarse gear 13 cooperate with the sliding grooves 22 of the fixing mechanism 12 to enable the coarse gear 13 to slide on the fixing mechanism 12. The bump 14 on the right side of the coarse rack 13 is used for limiting, so that the coarse rack 13 moves under a certain limit.
A circlip 20 is mounted below the planet wheels 9, connected to the drive shaft 19, so that the planet wheels 9 are axially fixed.
The upper part of the planet gear 9 is fixed with the transmission gear 10 through a shaft sleeve, the upper part of the transmission gear 10 is fixed through a fastening bolt, and axial and circumferential forces of the gear are balanced.
In specific implementation, four planet wheels 9 are arranged on the outer side of the central wheel 8 and meshed with the central wheel, the four planet wheels 9 are symmetrically distributed, a shaft 7 connected with a motor drives the central wheel 8 to rotate, and the central wheel 8 drives the planet wheels 9 to rotate; an inner ring gear 11 is arranged outside the four planet wheels 9, and the planet wheels 9 rotate to simultaneously rotate the inner ring gear 11; because the transmission gear 10 and the planet gear 9 share the same coaxial transmission shaft 19, the planet gear 9 rotates and drives the transmission gear 10 to rotate together through the transmission shaft 19; as the coarse rack 13 is meshed with the transmission gear 10, the transmission gear 10 drives the coarse rack 13 to move along the sliding groove 22 of the fixing mechanism 12 in the radial direction; because thick rack 13 is connected with short blade 3, so thick rack 13 removes and drives short blade 3 and carry out radial movement, has realized the common radial movement of a plurality of short blade 3, has adjusted the short blade diameter of composite blade, has realized short blade diameter adjustable composite blade function.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like, which indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, are used only for convenience in describing the present invention and brief description, and do not indicate or imply that a specific orientation of an indicated device or element is essential, and thus, the present invention is not to be construed as limited.
Claims (7)
1. The utility model provides a can adjust short blade diameter's composite blade structure which characterized in that: comprises an impeller (1), long blades (2), short blades (3), an impeller central cavity (4) and a blade adjusting mechanism (5); an impeller center cavity (4) is formed in the center of an impeller (1), a plurality of short blades (3) and a plurality of long blades (2) are arranged on the impeller (1), the number of the short blades (3) and the number of the long blades (2) are the same, the short blades (3) and the long blades (2) are alternately arranged along the circumferential direction, each short blade (3) and each long blade (2) are arranged along the radial direction, a blade adjusting mechanism (5) is installed in the impeller center cavity (4), a plurality of radial channels are formed in the impeller center cavity (4) along the circumferential direction, the blade adjusting mechanism (5) penetrates through the radial channels in the radial direction to be connected with the short blades (3), and the blade adjusting mechanism (5) drives the short blades (3) to move in the radial direction so as to adjust the diameter;
the blade adjusting mechanism comprises a fixed plate (6), a shaft (7) connected with a motor, a central wheel (8), a planet wheel (9), a transmission gear (10), an inner meshing gear (11), a fixing mechanism (12) and a coarse rack (13); the fixed plate (6) is fixed in the impeller center cavity (4), a shaft (7) connected with a motor is installed in the center of the fixed plate (6), the shaft (7) penetrates through the fixed plate (6) and then is coaxially and fixedly connected with the center of the center wheel (8), the periphery of the center wheel (8) is meshed with an inner gear ring of an inner meshing gear (11) through a plurality of planet wheels (9), the number of the planet wheels (9) is equal to that of the short blades (3), each planet wheel (9) is coaxially connected with one transmission gear (10) through a transmission shaft (19), the transmission shaft (19) is hinged on the fixed plate (6), a fixing mechanism (12) is arranged beside each transmission gear (10), sliding side grooves arranged along the radial direction of the impeller (1) are formed in the fixing mechanism (12), the coarse toothed bars (13) are slidably embedded in the sliding side grooves, and the outer ends of the coarse toothed bars (13) penetrate through radial channels and then are fixedly connected with the short blades (3).
2. A composite blade structure capable of adjusting the diameter of a short blade according to claim 1, wherein: the upper groove wall and the lower groove wall of the sliding side groove are provided with sliding grooves (22), sliding convex strips (16) are arranged on the upper surface and the lower surface of the coarse rack (13), and the sliding convex strips (16) are embedded in the sliding grooves (22), so that the coarse rack (13) is slidably arranged in the sliding side groove.
3. A composite blade structure capable of adjusting the diameter of a short blade according to claim 1, wherein: the convex blocks (14) are fixed on the inner end side and the outer end side of the coarse rack (13) in the radial direction of the fixing mechanism (12), and the convex blocks (14) are used for limiting the movement of the coarse rack (13) in the sliding side groove of the fixing mechanism (12).
4. A composite blade structure capable of adjusting the diameter of a short blade according to claim 1, wherein: still include jump ring (20), jump ring (20) install in planet wheel (9) below, connect in transmission shaft (19).
5. A composite blade structure capable of adjusting the diameter of a short blade according to claim 1, wherein: the number of the radial channels is the same as that of the short blades (3).
6. A composite blade structure capable of adjusting the diameter of a short blade according to claim 1, wherein: a shaft sleeve (15) is sleeved on a transmission shaft (19) between the planet wheel (9) and the transmission gear (10).
7. A composite blade construction for enabling short blade diameter adjustment according to claim 1, wherein: the fixing mechanism (12) is fixed on the fixing plate (6) through a fixing straight rod (21) in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110090086.1A CN112746986B (en) | 2021-01-22 | 2021-01-22 | Composite blade structure capable of adjusting diameter of short blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110090086.1A CN112746986B (en) | 2021-01-22 | 2021-01-22 | Composite blade structure capable of adjusting diameter of short blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112746986A CN112746986A (en) | 2021-05-04 |
| CN112746986B true CN112746986B (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110090086.1A Active CN112746986B (en) | 2021-01-22 | 2021-01-22 | Composite blade structure capable of adjusting diameter of short blade |
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| WO1995006829A1 (en) * | 1993-08-30 | 1995-03-09 | Aimbridge Pty. Ltd. | Transmission mechanism |
| CN102556146A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Electric power steering transmission mechanism and electric power steering system |
| CN102383871B (en) * | 2011-07-21 | 2014-12-03 | 常州新瑞汽车配件制造有限公司 | Turbocharger and working method thereof |
| ITPI20130046A1 (en) * | 2013-05-29 | 2013-08-28 | Antonio Chiodo | SYSTEM FOR ADJUSTING THE ANGLE OF ATTACHMENT OF THE POLES OF A WIND TURBINE WITH VERTICAL AXIS |
| CN103836004B (en) * | 2014-02-27 | 2016-05-11 | 长城汽车股份有限公司 | Water pump |
| CN204038971U (en) * | 2014-07-14 | 2014-12-24 | 凯能仪器（大连）有限公司 | A kind of speed two-speed hoist mechanism of penetrometer |
| CN105078387B (en) * | 2015-08-17 | 2017-06-27 | 安润集团安徽中润重工有限公司 | A kind of cycle type screwing device |
| CN205023476U (en) * | 2015-08-17 | 2016-02-10 | 安润集团安徽中润重工有限公司 | Three -jaw formula clamping device |
| CN106949090B (en) * | 2017-04-24 | 2023-03-31 | 浙江理工大学 | Centrifugal fan device with adjustable blades |
| CN106870449B (en) * | 2017-04-24 | 2023-03-28 | 浙江理工大学 | Centrifugal fan device with adjustable blades |
| CN208169193U (en) * | 2018-05-18 | 2018-11-30 | 浙江钜森机电有限公司 | A kind of adjustable centrifugal pump of impeller diameter |
| CN209796995U (en) * | 2019-03-27 | 2019-12-17 | 安徽荣泰玻璃制品有限公司 | Roll changing mechanism based on automatic packaging of beer bottles |
| CN112061961A (en) * | 2020-09-21 | 2020-12-11 | 唐云 | Hoisting mechanism for assembled building components and working method |
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2021
- 2021-01-22 CN CN202110090086.1A patent/CN112746986B/en active Active
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