CN112324712A - Flow regulating structure for centrifugal fan - Google Patents
Flow regulating structure for centrifugal fan Download PDFInfo
- Publication number
- CN112324712A CN112324712A CN202011446081.XA CN202011446081A CN112324712A CN 112324712 A CN112324712 A CN 112324712A CN 202011446081 A CN202011446081 A CN 202011446081A CN 112324712 A CN112324712 A CN 112324712A
- Authority
- CN
- China
- Prior art keywords
- hinged
- rotating
- centrifugal fan
- piece
- push
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 230000009471 action Effects 0.000 abstract description 15
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 abstract 1
- 230000009467 reduction Effects 0.000 abstract 1
- 235000012046 side dish Nutrition 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- 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
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
-
- 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
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
Abstract
A flow regulating structure for a centrifugal fan comprises an air inlet chamber formed by an inner barrel and an outer barrel, and a plurality of guide vanes arranged along the circumferential direction of the air inlet chamber, wherein the handle shafts of the guide vanes penetrate through the wall of the outer barrel, and the guide vanes and the outer barrel can be rotatably arranged; the handle shaft of the guide vane is fixedly arranged at one end of the rotating piece, the rotating piece is hinged with one end of the push-pull piece, the other end of the push-pull piece is hinged with the rotary table through a rotating column A, and the rotary table is connected with the driving mechanism; the turntable is limited by the limiting mechanism and can only rotate, and all guide vanes in the circumferential direction can be ensured to rotate together accurately, so that the aim of accurately adjusting the angle is fulfilled. The invention has the following beneficial effects: the impeller has the advantages of accurate adjustment, consistent action height of each guide vane, consistent circumferential air quantity, circumferential balance of the impeller, great reduction of vibration and improvement of use safety and reliability.
Description
Technical Field
The invention relates to the technical field of flow adjusting mechanisms, in particular to a flow adjusting structure for a centrifugal fan.
Technical Field
For a common centrifugal fan, when the air quantity entering the centrifugal fan is adjusted, the size of the centrifugal fan can be adjusted only by simply setting a switch valve, the valve is closed from one side to the other side, the circumferential wind in the pipeline is inconsistent in size, and when the centrifugal fan enters a turbine chamber, the impact on each blade in the circumferential direction of an impeller is unbalanced, so that the blades vibrate, and the reliability and the service life of the blades are influenced. Such low reliability may be relatively acceptable for a conventional centrifugal fan.
However, some devices with high requirements for accuracy and reliability are fatal, such as aviation.
The flow regulating structure is designed for the scheme, and circumferential air quantity is kept consistent by regulating the angle of the guide vane, so that unbalanced impact on each circumferential blade is avoided; meanwhile, key components are designed to only generate single action, so that the rotation and the translation of the key components are avoided, and the precision and the action reliability are further improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a flow regulating structure for a centrifugal fan, which has the advantages of accurate regulation, consistent action height of each guide vane and consistent circumferential air quantity, enables an impeller to be circumferentially balanced, greatly reduces vibration and improves use safety and reliability.
The purpose of the invention is realized by the following technical scheme: a flow regulating structure for a centrifugal fan comprises an air inlet chamber formed by an inner barrel and an outer barrel, and a plurality of guide vanes arranged along the circumferential direction of the air inlet chamber, wherein the handle shafts of the guide vanes penetrate through the wall of the outer barrel, and the guide vanes and the outer barrel can be rotatably arranged;
the handle shaft of the guide vane is fixedly arranged at one end of the rotating piece, the rotating piece is hinged with one end of the push-pull piece, the other end of the push-pull piece is hinged with the rotary table through a rotating column A, and the rotary table is connected with the driving mechanism;
the turntable is limited by the limiting mechanism and can only rotate, and all guide vanes in the circumferential direction can be ensured to rotate together accurately, so that the aim of accurately adjusting the angle is fulfilled.
Preferably, the outer ring of the outer cylinder is provided with an integrated left disc shell, a right disc shell is arranged on the left disc shell, and the left disc shell and the right disc shell form a protection cavity; the limiting mechanism, the rotary table, the rotary column A, the push-pull piece and the rotary piece are all arranged in the protection cavity. The protection cavity plays a role of protection and also has a role of installing the base piece.
Preferably, the rotary column A is arranged along the radial direction, and two ends of the rotary column A are hinged with the rotary disc and the push-pull piece through bearings; the push-pull pieces are arranged in parallel along the tangent plane of the turntable, are hinged with the rotating piece through a rotating column B arranged along the radial direction, and two ends of the rotating column B are provided with bearings; the handle shaft of the guide vane is hinged with the outer cylinder through a bearing.
Preferably, the limiting mechanism comprises a radial limiting mechanism and an axial limiting mechanism; the radial limit comprises a roller fixed on the periphery of the turntable, and the roller is in contact with the annular wall of the protection cavity to form limit; the axial limiting device comprises a baffle and a friction copper column, wherein the baffle is fixed on the wall of the protection cavity, and the friction copper column is fixed on the baffle; both sides of carousel all are provided with the baffle, and friction copper post is spacing with the carousel contact. The limiting is realized from the radial direction and the axial direction, and the accurate position of the turntable in the radial direction and the axial direction is ensured.
Preferably, the driving mechanism comprises a motor, a connecting rod A and a connecting rod B; the rotating shaft of the motor is sequentially hinged with a connecting rod A and a connecting rod B, and the connecting rod B is hinged on the turntable. The driving is realized through the rotation of the motor.
Furthermore, the wall of the protection cavity is provided with a notch for the connecting rod B to extend into.
Furthermore, the motor is fixed on the left disc shell through the base frame, the driving mechanism and the left disc shell (which are integrally arranged for the outer cylinder) are determined in position, so that the driving mechanism and the turntable (the turntable is arranged on the left disc shell through the limiting mechanism) are determined only in position, when the driving mechanism drives the turntable to act, the action is accurate, and the adverse effect of the installation error of the driving mechanism on the action precision of the driving turntable is avoided.
The invention has the following advantages:
(1) the guide vanes are arranged in the circumferential direction of the air inlet cavity, the air inlet amount is adjusted by adjusting the included angle between the adjacent guide vanes, the adjacent guide vanes rotate simultaneously, and the rotation angles are consistent, so that the circumferential air amount of the air inlet cavity is consistent, the pressure difference value of the two sides of the impeller tends to be consistent for all circumferential blades, finally the impeller does not generate vibration due to unbalance, the bolts cannot be easily loosened, and the safety, reliability and service life of the scheme are ensured;
(2) the turntable is limited in the radial direction and the axial direction through the limiting mechanism, so that the turntable can only rotate, the action is single, and the action accuracy can be ensured; although the rotary columns A and B can also rotate, the rotation of the rotating parts is mainly influenced by the position of the rotary column A, and the rotation of the rotating parts only plays the role of a movable joint; in a word, the turntable only rotates, so that accurate action can be guaranteed, accurate rotation of the guide vanes can be guaranteed through the accurate action, all the guide vanes in the circumferential direction can rotate accurately together in a unified mode, and the uniform air volume in the circumferential direction is guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention with the right disc shell removed;
FIG. 3 is a schematic structural view of the present invention without the left disc shell, the right disc shell, the inner cylinder and the outer cylinder;
FIG. 4 is a schematic view of the present invention with the right disc shell removed from another angle;
FIG. 5 is a cross-sectional schematic view of the present invention leaving only one vane;
in the figure: 1-inner cylinder, 2-outer cylinder, 3-air inlet chamber, 4-guide vane, 5-rotating piece, 6-pushing and pulling piece, 7-rotating column A, 8-rotating disc, 9-left disc shell, 10-right disc shell, 11-protecting cavity, 12-roller, 13-baffle, 14-friction copper column, 15-motor, 16-connecting rod A, 17-connecting rod B.
Detailed Description
The invention will be further described with reference to the accompanying drawings, to which the scope of the invention is not limited.
As shown in fig. 1 to 5, a flow regulating structure for a centrifugal fan comprises an air inlet chamber 3 formed by an inner cylinder 1 and an outer cylinder 2, and a plurality of guide vanes 4 arranged along the circumferential direction of the air inlet chamber 3, wherein the stem of each guide vane 4 penetrates through the wall of the outer cylinder 2, and the guide vanes and the outer cylinder are rotatably arranged therebetween. The inner cylinder 1 is plugged by a plugging plate, the outer cylinder 2 is sleeved and fixed on the inner cylinder 1 by a supporting plate, and the air inlet chamber 3 is actually an annular chamber; the air inlet volume of the annular cavity can be adjusted by adjusting the included angle between the adjacent guide vanes 4 in the annular cavity.
The scheme aims at the inlet hole between the impellers for wind to enter. Because the angle of the guide vanes 4 arranged in the circumferential direction is adjusted together, the air inlet openings formed between the adjacent guide vanes 4 in the circumferential direction are the same, the size of the wind formed in the circumferential direction is kept consistent, the impact generated in the circumferential direction of the impeller is the same, and the impact on the impeller is balanced, so that the vibration caused by imbalance is avoided, the reliability of operation is improved, and the service life is prolonged. The condition that the impeller is shaken off due to the fact that screws are loosened due to vibration in operation can be avoided, and the overall safety is improved.
The above-described shock caused by the impact is specifically explained as follows: the pressure of the air outlet side of the impeller is higher than that of the air inlet side due to the operation of the impeller, and the air outlet side has a reaction force to the impeller towards the air inlet side; when the air volume of intake side circumference is uneven, the impeller will rock, because reaction force's existence, rocking of impeller will be aggravated to lead to the impeller to rock the range grow, produce vibrations promptly.
In this scheme, be provided with integrative left side dish shell 9 in the outer lane of outer section of thick bamboo 2, left side dish shell 9 installs right side dish shell 10 and both form protection chamber 11 through the bolt, and protection chamber 11 also is the annular chamber.
In order to achieve uniformity in the operation of the guide vanes 4 arranged in the circumferential direction and to achieve the same rotation angle, a good structure is required. In this solution, as shown in fig. 2, 3 and 5: the rotary table 8 is arranged in the protective cavity 11 through a limiting mechanism, so that the rotary table 8 can only rotate but cannot move; and the rotating disc 8 is also connected with a driving mechanism.
In particular, as shown in fig. 5 (for ease of understanding, this figure only shows the adjustment of one vane 4): the rotary table 8 is annular, the section of the rotary table is L-shaped, a plurality of rotary columns A7 are hinged along the circumferential direction through bearings, and the rotary columns A7 are also hinged with the push-pull piece 6 through bearings; the push-pull piece 6 is arranged along the tangent plane of the parallel turntable 8, and the push-pull piece 6 is also hinged with the rotary column B through a bearing; the rotating column B is also arranged along the radial direction of the rotating disc 8 and is hinged with the rotating piece 5 through a bearing; the guide vane 4 is arranged in the radial direction, the handle shaft of the guide vane passes through the wall of the outer cylinder 2, the guide vane and the outer cylinder are arranged through a bearing, and the end, through which the handle shaft passes, of the guide vane is fixedly arranged on the rotating piece 5.
When adjusting the angle of the guide vane 4: the rotary table 8 rotates under the action of the driving mechanism, the rotary table 8 drives the rotary column A7 to rotate together, the rotary column A7 drives the push-pull piece 6 to move, the push-pull piece 6 drives the rotating piece 5 to rotate, and the rotating piece 5 drives the guide piece 4 to rotate, so that the purpose of adjusting the angle is achieved. Because one end of the rotating piece 5 is fixedly arranged with the handle shaft of the guide vane 4, the rotating piece 5 can only rotate, and the pushing and pulling piece 6 can not only move along with the rotary disc 8 but also rotate to a certain degree in the plane (namely the plane parallel to the tangent plane of the rotary disc 8) when moving.
Since the turntable 8 only rotates, the rotating column A7 only realizes the action, and the position precision of the action is guaranteed; the rotating piece 5 rotates through the rotating column B via the pushing piece 6, and the pushing piece 6 only plays a role in middle self-adaptive action and transmission; the rotation of the rotary member 5 is uniquely determined according to the motion of the rotary post a7 rotating with the turntable 8, and the accuracy of the motion is high. The accuracy of the rotation of the rotating member 5 is high, and the accuracy of the rotation of the guide vane 4 is ensured.
In this scheme, stop gear, carousel 8, rotary column A7, push-and-pull 6, rotate piece 5 and all set up in protection cavity 11.
In this embodiment, as shown in fig. 2, 4 and 5, the stopper mechanism: comprises radial limit and axial limit; the radial limit comprises a roller 12 fixed on the periphery of the turntable 8 in the circumferential direction, and the roller 12 is in contact with the annular wall of the protection cavity 11 to form limit; the axial limiting comprises a baffle 13 and a friction copper column 14, the baffle 13 is fixed on the wall of the protection cavity 11, and the friction copper column 14 is fixed on the baffle 13; both sides of carousel 8 all are provided with baffle 13, and friction copper post 14 is spacing with carousel 8 contact.
The structure of the limiting mechanism is only one preferred implementation mode, and all other limiting modes which only allow the turntable 8 to act singly are within the protection range of the scheme.
In the present embodiment, as shown in fig. 1, 2, 4, and 5, the driving mechanism includes a motor 15, a link a16, a link B17; the outer cylinder 2 is fixed with a motor 15 through a base frame, an output shaft of the motor 15 is hinged with one end of a connecting rod A16, and the other end of the connecting rod A16 is hinged with a connecting rod B17; the other end of the connecting rod B17 is hinged with the rotary disk 8 by penetrating into the protection cavity 11 through a notch on the wall of the protection cavity 11.
In this embodiment, the left and right baffles 13 are actually fixed on the left disk shell 9, so that the position of the turntable 8 limited by the limiting mechanism is actually determined according to the left disk shell 9; the motor 15 is fixed on the left disc shell 9 through a base frame; the position of the motor 15 and the turntable 8 is actually determined. When the motor 15 acts, the good action precision of the rotating disc 8 can be ensured.
The above examples are merely representative of preferred embodiments, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (7)
1. The utility model provides a flow control structure for centrifugal fan which characterized in that: the method comprises the following steps:
an air inlet chamber (3) formed by the inner cylinder (1) and the outer cylinder (2);
a plurality of guide vanes (4) are arranged along the circumferential direction of the air inlet cavity (3), and the handle shafts of the guide vanes (4) penetrate through the wall of the outer barrel (2) and are rotatably arranged between the guide vanes and the outer barrel;
the handle shaft of the guide vane (4) is fixedly arranged at one end of the rotating piece (5), the rotating piece (5) is hinged with one end of the push-pull piece (6), the other end of the push-pull piece (6) is hinged with the rotary table (8) through a rotating column A (7), and the rotary table (8) is connected with the driving mechanism;
the turntable (8) is limited by a limiting mechanism and can only rotate.
2. A flow regulating structure for a centrifugal fan according to claim 1, characterized in that: the outer ring of the outer cylinder (2) is provided with an integrated left disc shell (9), a right disc shell (10) is arranged on the left disc shell (9), and a protection cavity (11) is formed by the left disc shell and the right disc shell;
the limiting mechanism, the rotary table (8), the rotary column A (7), the push-pull piece (6) and the rotary piece (5) are all arranged in the protection cavity (11).
3. A flow regulating structure for a centrifugal fan according to claim 2, characterized in that: the rotating column A (7) is arranged along the radial direction, and two ends of the rotating column A are hinged with the rotating disc (8) and the push-pull piece (6) through bearings;
the push-pull piece (6) is arranged in parallel along the tangent plane of the turntable (8), and is hinged with the rotating piece (5) through a rotating column B arranged along the radial direction, and two ends of the rotating column B are provided with bearings;
the handle shaft of the guide vane (4) is hinged with the outer cylinder (1) through a bearing.
4. A flow rate regulating structure for a centrifugal fan according to claim 2 or 3, characterized in that: the limiting mechanism comprises radial limiting and axial limiting;
the radial limiting comprises a roller (12) fixed on the edge of the rotary table (8) in the circumferential direction, and the roller (12) is in contact with the annular wall of the protection cavity (11) to form limiting;
the axial limiting device comprises a baffle (13) and a friction copper column (14), wherein the baffle (13) is fixed on the wall of the protection cavity (11), and the friction copper column (14) is fixed on the baffle (13); both sides of carousel (8) all are provided with baffle (13), and friction copper post (14) and carousel (8) contact are spacing.
5. A flow regulating structure for a centrifugal fan according to claim 4, characterized in that: the driving mechanism comprises a motor (15), a connecting rod A (16) and a connecting rod B (17);
the rotating shaft of the motor (15) is sequentially hinged with a connecting rod A (16) and a connecting rod B (17), and the connecting rod B (17) is hinged on the turntable (8).
6. A flow regulating structure for a centrifugal fan according to claim 5, characterized in that: the wall of the protection cavity (11) is provided with a gap for the connecting rod B (17) to extend into.
7. A flow regulating structure for a centrifugal fan according to claim 6, wherein: the motor (15) is fixed on the left disc shell (9) through a base frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446081.XA CN112324712A (en) | 2020-12-11 | 2020-12-11 | Flow regulating structure for centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446081.XA CN112324712A (en) | 2020-12-11 | 2020-12-11 | Flow regulating structure for centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112324712A true CN112324712A (en) | 2021-02-05 |
Family
ID=74301828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011446081.XA Pending CN112324712A (en) | 2020-12-11 | 2020-12-11 | Flow regulating structure for centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357193A (en) * | 2021-06-25 | 2021-09-07 | 山东天瑞重工有限公司 | Inlet guide vane adjusting device and air blower |
-
2020
- 2020-12-11 CN CN202011446081.XA patent/CN112324712A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357193A (en) * | 2021-06-25 | 2021-09-07 | 山东天瑞重工有限公司 | Inlet guide vane adjusting device and air blower |
| CN113357193B (en) * | 2021-06-25 | 2023-01-20 | 山东天瑞重工有限公司 | Inlet guide vane adjusting device and air blower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6547520B2 (en) | Rotating vane diffuser for a centrifugal compressor | |
| CN201262164Y (en) | Air-intake vane apparatus | |
| CN102454620B (en) | Air supply fan | |
| CN101725568B (en) | Diffusion guide vane synchronous adjusting mechanism of high-speed centrifugal fan | |
| CN102265038B (en) | Adjustable mechanical coolant pump | |
| US20120201701A1 (en) | Centrifugal compressor having variable geometry diffuser and method thereof | |
| HK1093141A1 (en) | Hair dryer | |
| US11105203B2 (en) | High efficiency centrifugal impeller with balancing weights | |
| CN112324712A (en) | Flow regulating structure for centrifugal fan | |
| CN216518858U (en) | Flow regulating structure for centrifugal fan | |
| CN104100574A (en) | Mechanism for synchronously adjusting diffusion guide vanes of fan | |
| CN201554699U (en) | Diffusion guide vane synchronization adjusting mechanism of high-speed centrifugal fan | |
| CN113847257B (en) | Magnetic suspension axial flow fan structure | |
| CN108591082A (en) | A kind of axial thrust self-balance type multistage centrifugal blower | |
| JPH07158593A (en) | Motor-driven blower | |
| US11346366B2 (en) | Rotating diffuser in centrifugal compressor | |
| CN208634062U (en) | A kind of axial thrust self-balance type multistage centrifugal blower | |
| CN220286005U (en) | Vortex fan | |
| CN205841252U (en) | A kind of axial flow blower | |
| CN213478763U (en) | Axial flow high-pressure compressor and adjusting mechanism of adjustable stationary blade | |
| CN204532939U (en) | A kind of axial force balance mechanism of MD type multistage centrifugal pump | |
| CN219605634U (en) | Centrifugal pump impeller with curved back vane structure | |
| KR102207036B1 (en) | Vacuum pump with suction structure of impeller-type balancing weight | |
| CN217002338U (en) | Double-rotor axial flow fan | |
| CN220227285U (en) | Damping guide vane mechanism driven by pneumatic angular travel actuator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |