CN111664118A - Multi-working-condition wing type centrifugal fan impeller - Google Patents
Multi-working-condition wing type centrifugal fan impeller Download PDFInfo
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- CN111664118A CN111664118A CN202010658053.8A CN202010658053A CN111664118A CN 111664118 A CN111664118 A CN 111664118A CN 202010658053 A CN202010658053 A CN 202010658053A CN 111664118 A CN111664118 A CN 111664118A
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- blade
- centrifugal fan
- fan impeller
- connecting rod
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- 230000008859 change Effects 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/287—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps with adjusting means
Abstract
The invention discloses a multi-working-condition wing type centrifugal fan impeller which comprises a front disc, a middle disc and a plurality of blades circumferentially and uniformly distributed between the front disc and the middle disc, wherein a hub is arranged in the middle of the middle disc, blade shafts are arranged in the middle of the blades, the first ends and the second ends of the blade shafts are respectively connected to the front disc and the middle disc, the first ends of the blade shafts are connected with a rotating ring which is coaxial with the front disc through a connecting piece, and the rotating ring rotates to drive the connecting piece to rotate so as to drive the blade shafts to rotate, so that the outlet angles of the blades are changed.
Description
Technical Field
The invention relates to the field of fan impellers, in particular to a multi-working-condition wing type centrifugal fan impeller.
Background
The centrifugal fan is widely applied to occasions such as steel mills, chemical industry, cement, mines and the like, mainly has the functions of air induction, material feeding, tail exhaust, ventilation, dust removal, cooling and the like, and is a large industrial centrifugal fan which is generally customized under rated working conditions according to production requirements and process requirements, but the air flow and the air pressure can be changed according to the yield, pipelines and process parameters of industrial production in the using process. The impeller blades of the existing centrifugal fan are difficult to adjust, the working conditions are fixed, the requirement of multiple working conditions cannot be met, when the field working conditions change, the control is carried out through an air damper, or the fan is replaced to meet the field use requirement, the cost input is too high, the pipeline resistance is increased when the air damper is closed, and the running cost of the fan is increased.
In recent years, the frequency converter can be widely used for adjusting the working condition in a small range, but the cost of the frequency converter is high due to the high power of the industrial fan, and the frequency converter has larger impact on a high-voltage power grid, so that the potential safety hazard of safe operation is increased. The general frequency converter can only change from power frequency to low frequency, and the requirements of industrial production improvement and environmental protection cannot be met.
At present, there are centrifugal fan devices with bluetooth remote control and adjustable blades disclosed in chinese patent publication No. CN105756987B, and also there is an assembled centrifugal fan impeller with adjustable blade angle disclosed in chinese patent publication No. CN209908838U, but the two patents have the following disadvantages:
a centrifugal fan device of adjustable blade is far controlled to bluetooth: the surface of the outer impeller blade of the patent is provided with a large number of sensors, so that the price is high and the sensor is easy to damage; an electric push rod and a Bluetooth intelligent terminal on an outer wheel disc can damage the uniform distribution structure of the impeller, so that the dynamic balance is difficult to control, and the vibration is large; the Bluetooth control has the problem of endurance of the power supply and is difficult to persist.
An assembled centrifugal fan impeller with adjustable blade angle: the impeller is a single-plate blade, the middle of the blade penetrates through a pull rod shaft, and the transition of the shaft penetrating position of the blade is not smooth due to the single-plate structure, so that the energy loss is large and the efficiency is low; the arrangement of the bolt positioning causes the low adjustment precision of the air quantity and the air pressure, and a dead point area exists; the contact surface of the guide disc and the rear disc is large, the friction force is large, and the blades are difficult to adjust.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned deficiencies and drawbacks of the prior art, and to provide a multi-operating-condition airfoil type centrifugal fan impeller to solve the above-mentioned problems.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
multi-operating mode wing section centrifugal fan impeller, including a plurality of blades of head disk, well dish and circumference equipartition setting between head disk and well dish, the middle part of well dish is provided with wheel hub, and the middle part of blade is provided with the blade axle, and the first end and the second end of blade axle are connected respectively on head disk and well dish, and the first end of blade axle passes through the connecting piece with the circle of the coaxial setting of head disk and is connected, and the rotation of circle drives the connecting piece and rotates, and then drives the blade axle and rotate for the blade changes the exit angle.
In a preferred embodiment of the present invention, the connecting member includes a connecting rod disposed on the front disc, a first end of the connecting rod is connected to a first end of the vane shaft, a second end of the connecting rod is connected to the rotating ring, and rotation of the rotating ring drives the connecting rod to rotate around the first end thereof, thereby driving the vane shaft to rotate, so that the vanes change the outlet angle.
In a preferred embodiment of the invention, the front disc is provided with a locking and limiting assembly for limiting the rotating ring.
In a preferred embodiment of the present invention, the locking and limiting assembly includes a lower limiting block fixed on the front plate and an upper limiting block correspondingly matched with the lower limiting block to compress the rotating ring, and the upper limiting block and the lower limiting block are connected by a bolt.
In a preferred embodiment of the invention, the bolt section between the upper limiting block and the lower limiting block is further sleeved with a spring.
In a preferred embodiment of the present invention, the front disc is provided with a plurality of guide assemblies for rotatably guiding the rotary ring.
In a preferred embodiment of the present invention, the guide assembly includes a pulley frame fixed on the front disc and a pulley rotatably disposed on the pulley frame, and an annular groove engaged with the inner ring or the outer ring of the rotating ring is disposed in the middle of the pulley.
In a preferred embodiment of the present invention, an angle scale is arranged on the front disc, and a pointer corresponding to the angle scale is arranged on the rotating ring.
In a preferred embodiment of the present invention, the blade includes an upper blade and a lower blade, a reinforcing rib is disposed between the upper blade and the lower blade, end plates are welded to both ends of the upper blade and the lower blade, the blade shaft is disposed between the upper blade and the lower blade, and a first end and a second end of the blade shaft respectively penetrate through the end plates and then are connected to the front disk and the middle disk.
In a preferred embodiment of the invention, the first end of the blade shaft is provided with a square shaft section, the first end of the connecting rod is provided with a square hole corresponding to the square shaft section, the bottom of the rotating ring is circumferentially provided with a plurality of short pins at intervals, and the second end of the connecting rod is provided with a kidney-shaped hole matched with the short pins.
Due to the adoption of the technical scheme, the invention is formed by assembling multiple components, the outlet angle of the impeller can be calculated according to the actually required air quantity and air pressure after the impeller is assembled, when a customer needs to improve, the air quantity and the air pressure can be increased only by adjusting the outlet angle of the blades, the impeller or the whole set of fan does not need to be replaced, and the invention is convenient, time-saving and cost-saving. When the small flow is operated on site, the air door needs to be closed in the past, the resistance of a pipe network is increased, the operation of the fan deviates from a high-efficiency area, the air quantity and the air pressure can be reduced by adjusting the outlet angle of the small blade, and the operation of the fan in the high-efficiency area is kept. The frequency converter can only be used for adjusting the working condition in a small range, the power of the industrial fan is high, the cost of the frequency converter is high, the impact of the frequency converter on a high-voltage power grid is large, the potential safety hazard of safe operation is increased, the frequency converter can be omitted by using the multi-working-condition wing type centrifugal fan impeller, the safety and the reliability are realized, the cost is low, the application range is wide, and the design of adjustable working conditions can meet the production of more variable working conditions. The parts have strong universality, can be used for various models and are convenient for mass production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective view of the structure of one embodiment of the present invention.
Fig. 2 is a front view of one embodiment of the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a sectional view a-B of fig. 2.
Fig. 5 is an enlarged view at I of fig. 3.
Fig. 6 is an enlarged view at II of fig. 3.
Fig. 7 is an enlarged view at III of fig. 4.
Fig. 8 is a schematic structural diagram of a swivel according to an embodiment of the present invention.
FIG. 9 is a schematic structural diagram of a connecting rod in accordance with an embodiment of the present invention.
FIG. 10 is a schematic view of a blade according to an embodiment of the invention.
Fig. 11 is a cross-sectional view of fig. 10.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
Referring to fig. 1 to 11, the multi-operating-condition airfoil centrifugal fan impeller includes a front disk 100, a middle disk 200 and a plurality of blades 300, wherein the front disk 100 and the middle disk 200 are coaxially disposed, and the plurality of blades 300 are circumferentially disposed between the front disk 100 and the middle disk 200. The initial exit angle of each vane 300 remains uniform, facilitating subsequent uniform adjustment.
The front disk 100 is formed by welding a mouth ring 110 and a front disk cover plate 120, and circular through holes 101 are uniformly distributed on the front disk cover plate 120 and are used for penetrating first ends 311 of blade shafts 310 of the blades 300.
The middle disc 200 is formed by welding a middle disc middle plate 210 and a reinforcing ring 220, circular through holes 201 are distributed at the same positions of the middle disc middle plate 210 and a front disc cover plate 120 of the front disc 100 and are used for penetrating second ends 312 of blade shafts 310 of the blades 300, and an inner hole of the middle disc 200 is matched with the hub 400.
The vane 300 is provided at the middle thereof with a vane shaft 310, and a first end 311 and a second end 312 of the vane shaft 310 are respectively coupled to the front plate 100 and the middle plate 200. Specifically, the first end 311 and the second end 312 of the vane shaft 310 are locked and positioned by the nut 10, the spring washer 11 and the large washer 12. The first end 311 of the blade shaft 310 is connected to the rotating ring 500 coaxially disposed with the front disc 100 through a connecting member, and the rotation of the rotating ring 500 drives the connecting member to rotate, thereby driving the blade shaft 310 to rotate, so that the blade 300 changes the outlet angle. In this embodiment, the connecting member includes a connecting rod 600 disposed on the front disc 100, the connecting rod 600 is disposed between the front disc 100 and the large pad 12, the first end of the connecting rod 600 is connected to the first end 311 of the blade shaft 310, the second end of the connecting rod 600 is connected to the rotating ring 500, the rotating ring 500 rotates the connecting rod 600 around the first end thereof, and further the blade shaft 310 is driven to rotate, so that the blade 300 changes the exit angle. Specifically, a square shaft section 311a is arranged at the first end 311 of the blade shaft 310, a square hole 610 corresponding to the square shaft section 311a is arranged at the first end of the connecting rod 600, a plurality of short pins 510 are circumferentially arranged at intervals at the bottom of the rotating ring 500, and a kidney-shaped hole 620 matched with the short pins 510 is arranged at the second end of the connecting rod 600. In order to facilitate the rotation of the ring 500, a handle 520 is further provided on the ring 500.
The front disc 100 is provided with a locking and limiting assembly 700 for limiting the rotating ring 500, the locking and limiting assembly 700 comprises a lower limiting block 710 fixed on the front disc 100 and an upper limiting block 720 correspondingly matched with the lower limiting block 710 to compress the rotating ring 500, the upper limiting block 720 and the lower limiting block 710 are connected through a bolt 730, and the upper limiting block 720 and the lower limiting block 710 can limit the axial movement of the rotating ring 500. The limiting slot 721 on the upper limiting block 720 is adapted to the width of the rotating ring 500, and can further limit the radial movement of the rotating ring 500. The bolt section between the upper limiting block 720 and the lower limiting block 710 is also sleeved with a spring 740, the spring 740 can bounce the upper limiting block 720 when the bolt 730 is loosened, the friction force between the locking limiting assembly 700 and the rotating ring 500 is reduced, and the rotating ring 500 is convenient to rotate.
In order to improve the rotation flexibility of the bezel 500, the front plate 100 is provided with a plurality of guide assemblies 800 for rotatably guiding the bezel 500. The guide assembly 800 includes a pulley holder 810 fixed to the front plate 100 and a pulley 830 rotatably provided on the pulley holder 810 by a rotation pin 820, and a ring groove 831 provided at a middle portion of the pulley 830 to be engaged with an inner ring or an outer ring of the turn 500, the ring groove 831 in this embodiment being engaged with the inner ring of the turn 500. The width of the annular groove 831 is adapted to the thickness of the turn 500, enabling further limitation of the axial movement of the turn 500.
In order to facilitate the control of the exit angle of the blades 300, an angle scale 20 is provided on the front plate 100, and a pointer 30 corresponding to the angle scale 20 is provided on the rotation ring 500.
The blade 300 in the embodiment includes an upper blade 301 and a lower blade 302, a reinforcing rib 303 is disposed between the upper blade 301 and the lower blade 302, end plates 304, 305 are welded to two ends of the upper blade 301 and the lower blade 302, one sides of the upper blade 301 and the lower blade 302 are sealed and welded, the other sides of the upper blade 301 and the lower blade 302 are connected with a reinforcing rib 306, a blade shaft 310 is disposed between the upper blade 301 and the lower blade 302, and a first end 311 and a second end 312 of the blade shaft 310 are connected to the front disc 100 and the middle disc 200 after respectively penetrating through the end plates 304, 305. Due to the double-blade structure of the blade 300, the blade shaft 310 does not directly penetrate through the blade, but penetrates through the end plates 304 and 305, so that the shaft penetrating position is transited smoothly, the energy loss is small, and the efficiency is high.
The working principle of the invention is as follows:
calculating the outlet angle of the impeller according to the actually required air volume and air pressure, loosening the locking limiting assembly 700, pushing the handle 520 of the rotating ring 500 to drive the connecting rod 600 to drive around the first end, and driving the blade shaft 310 to rotate as the square hole 610 of the connecting rod 600 is connected with the square shaft section 311a of the blade shaft 310, determining the outlet angle of the blade 300 according to the value of the pointer 30 pointing to the angle scale 20, and fixing the rotating ring 500 by using the locking limiting assembly 700 after the pointer 30 reaches the designated position, thereby completing the adjustment; and can be adjusted again if necessary.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. Multi-operating mode wing section centrifugal fan impeller, including a plurality of blades of head disk, well dish and circumference equipartition setting between head disk and well dish, the middle part of well dish is provided with wheel hub, and the middle part of blade is provided with the blade axle, and the first end and the second end of blade axle are connected respectively on head disk and well dish, and its characterized in that, the first end of blade axle with the coaxial change of setting of head disk pass through the connecting piece and be connected, the rotation of change circle drives the connecting piece and rotates, and then drives the blade axle and rotate for the blade changes the exit angle.
2. The multi-operating-condition airfoil centrifugal fan impeller of claim 1, wherein the connecting member comprises a connecting rod disposed on the front disk, a first end of the connecting rod is connected with a first end of the blade shaft, a second end of the connecting rod is connected with a turn, and rotation of the turn drives the connecting rod to rotate around the first end thereof, thereby driving the blade shaft to rotate, so that the blade changes the outlet angle.
3. The multi-operating-condition airfoil centrifugal fan impeller of claim 1, wherein the front disk is provided with a locking and limiting assembly for limiting the rotation ring.
4. The multi-operating-condition airfoil type centrifugal fan impeller of claim 3, wherein the locking limiting assembly comprises a lower limiting block fixed on the front disc and an upper limiting block correspondingly matched with the lower limiting block to compress the rotating ring, and the upper limiting block and the lower limiting block are connected through a bolt.
5. The impeller of claim 4, wherein the bolt section between the upper and lower limiting blocks is further sleeved with a spring.
6. The multi-operating-condition airfoil-type centrifugal fan impeller of claim 1, wherein the front disk is provided with a plurality of guide assemblies for rotationally guiding the rotating ring.
7. The multi-operating-condition airfoil-type centrifugal fan impeller of claim 6, wherein the guide assembly comprises a pulley yoke fixed on the front disc and a pulley rotatably arranged on the pulley yoke, and an annular groove matched with the inner ring or the outer ring of the rotating ring is formed in the middle of the pulley.
8. The multi-operating-condition airfoil-type centrifugal fan impeller as claimed in claim 1, wherein an angle scale table is arranged on the front disk, and a pointer corresponding to the angle scale table is arranged on the rotating ring.
9. The impeller of claim 1, wherein the blades comprise an upper blade and a lower blade, a reinforcing rib is arranged between the upper blade and the lower blade, end plates are welded at two ends of the upper blade and the lower blade, a blade shaft is arranged between the upper blade and the lower blade, and a first end and a second end of the blade shaft respectively penetrate through the end plates and then are connected to the front disc and the middle disc.
10. The multi-operating-condition wing-type centrifugal fan impeller as claimed in claim 1, wherein a square shaft section is provided at a first end of the blade shaft, a square hole corresponding to the square shaft section is provided at a first end of the connecting rod, a plurality of short pins are provided at circumferential intervals at the bottom of the turn, and a kidney-shaped hole matched with the short pins is provided at a second end of the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658053.8A CN111664118A (en) | 2020-07-09 | 2020-07-09 | Multi-working-condition wing type centrifugal fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658053.8A CN111664118A (en) | 2020-07-09 | 2020-07-09 | Multi-working-condition wing type centrifugal fan impeller |
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| Publication Number | Publication Date |
|---|---|
| CN111664118A true CN111664118A (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010658053.8A Pending CN111664118A (en) | 2020-07-09 | 2020-07-09 | Multi-working-condition wing type centrifugal fan impeller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360777A (en) * | 2020-10-30 | 2021-02-12 | 鲍岚 | Diversion supercharging energy-saving centrifugal fan |
| CN112412871A (en) * | 2020-11-23 | 2021-02-26 | 安徽朗迪叶轮机械有限公司 | Centrifugal fan blade convenient to fast assembly |
| CN113264379A (en) * | 2021-07-19 | 2021-08-17 | 南通九港通机械科技有限公司 | Power element of powder conveying device and processing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332945A (en) * | 2015-12-08 | 2016-02-17 | 浙江理工大学 | Centrifugal fan impeller capable of adjusting splitting vanes |
| CN209908838U (en) * | 2019-04-03 | 2020-01-07 | 鞍山钢峰风机有限责任公司 | Assembled centrifugal fan impeller of adjustable blade angle |
| CN212297017U (en) * | 2020-07-09 | 2021-01-05 | 上海瑞晨环保科技股份有限公司 | Multi-working-condition wing type centrifugal fan impeller |
-
2020
- 2020-07-09 CN CN202010658053.8A patent/CN111664118A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332945A (en) * | 2015-12-08 | 2016-02-17 | 浙江理工大学 | Centrifugal fan impeller capable of adjusting splitting vanes |
| CN209908838U (en) * | 2019-04-03 | 2020-01-07 | 鞍山钢峰风机有限责任公司 | Assembled centrifugal fan impeller of adjustable blade angle |
| CN212297017U (en) * | 2020-07-09 | 2021-01-05 | 上海瑞晨环保科技股份有限公司 | Multi-working-condition wing type centrifugal fan impeller |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360777A (en) * | 2020-10-30 | 2021-02-12 | 鲍岚 | Diversion supercharging energy-saving centrifugal fan |
| CN112412871A (en) * | 2020-11-23 | 2021-02-26 | 安徽朗迪叶轮机械有限公司 | Centrifugal fan blade convenient to fast assembly |
| CN113264379A (en) * | 2021-07-19 | 2021-08-17 | 南通九港通机械科技有限公司 | Power element of powder conveying device and processing method thereof |
| CN113264379B (en) * | 2021-07-19 | 2021-09-10 | 南通九港通机械科技有限公司 | Power element of powder conveying device and processing method thereof |
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