CN210371233U - Two-stage centrifugal ventilator with impeller inlets arranged oppositely - Google Patents
Two-stage centrifugal ventilator with impeller inlets arranged oppositely Download PDFInfo
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- CN210371233U CN210371233U CN201920963753.0U CN201920963753U CN210371233U CN 210371233 U CN210371233 U CN 210371233U CN 201920963753 U CN201920963753 U CN 201920963753U CN 210371233 U CN210371233 U CN 210371233U
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Abstract
The utility model belongs to the technical field of centrifugal ventilators, in particular to a two-stage centrifugal ventilator with oppositely arranged impeller inlets, which comprises a primary ventilation unit and a secondary ventilation unit, wherein the primary ventilation unit comprises a primary adjusting door, a primary air inlet box, a primary air inlet, a primary shell group, a main shaft and a primary fan impeller arranged on the main shaft; the secondary ventilation unit comprises a secondary fan impeller, a secondary air inlet box, a secondary adjusting door, a secondary air inlet and a secondary machine shell group which is connected with the primary machine shell group in series; the primary fan impeller is positioned in the primary machine shell group, the secondary fan impeller is positioned in the secondary machine shell group, the main shaft sequentially penetrates into the primary air inlet box and the primary machine shell group, and the primary fan impeller and the secondary fan impeller are arranged on the main shaft. The centrifugal ventilator with the structure can solve the problems of large occupied space and high manufacturing cost in the prior art.
Description
Technical Field
The utility model belongs to the technical field of centrifugal fan, especially, relate to a doublestage centrifugal fan of impeller import mutual disposition.
Background
The working principle of the centrifugal ventilator is as follows: when the impeller rotates, the gas between the blades is subjected to centrifugal force to obtain kinetic energy (dynamic pressure head) to be discharged from the periphery of the impeller, and flows to the outlet of the ventilator through the guide of the volute casing, so that negative pressure is formed at the central part of the impeller, external airflow continuously flows in for supplement, and the ventilator can discharge the gas.
The existing centrifugal ventilator mainly comprises a casing and an impeller, wherein the casing mainly comprises a single-suction transmission casing and a double-suction transmission casing, the single-suction transmission casing comprises an air inlet box and a volute, the double-suction transmission casing comprises two air inlet boxes and a volute, an air inlet of the air inlet box is provided with an adjusting door, and the impeller is positioned in the volute.
In the design selection process of centrifugal fan, adopt a centrifugal fan can not reach the performance requirement because various reasons, then in order to satisfy the performance requirement, often connect many centrifugal fans in parallel or establish ties, but such structure makes centrifugal fan whole great, during the installation, has occupied great space, and many centrifugal fans adopt the motor to drive the operation respectively simultaneously, have also led to manufacturing cost higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a doublestage centrifugal fan of impeller import mutual disposition to solve prior art and lead to the problem that occupation space is big, manufacturing cost is high with many centrifugal fans parallelly connected or establish ties.
In order to achieve the above purpose, the technical scheme of the utility model is that: a two-stage centrifugal ventilator with impeller inlets arranged oppositely comprises a primary ventilation unit and a secondary ventilation unit, wherein the primary ventilation unit comprises a primary adjusting door, a primary air inlet box, a primary air inlet, a primary machine shell group, a main shaft and a primary fan impeller, and the main shaft is connected with a driving device; the secondary ventilation unit comprises a secondary fan impeller, a secondary air inlet box, a secondary adjusting door, a secondary air inlet and a secondary machine shell group which is connected with the primary machine shell group in series; the primary fan impeller is positioned in the primary machine shell group, and the secondary fan impeller is positioned in the secondary machine shell group; the main shaft sequentially passes through the primary machine shell group, the primary fan impeller, the primary air inlet box, the shared side plate of the air inlet box, the secondary air inlet, the secondary fan impeller and the secondary machine shell group, wherein the primary fan impeller and the secondary fan impeller are fixed on the main shaft, and the rest parts are rotationally connected to the main shaft; the air conditioner comprises a shell, a first-level adjusting door, a first-level air inlet box, a first-level air inlet and a first-level shell group, wherein the first-level adjusting door, the first-level air inlet box, the first-level air inlet and the first-level shell group are sequentially communicated, a second-level adjusting door, a second-level air inlet box, a second-level air inlet and the second-level shell group are sequentially communicated, and.
The working principle of the technical scheme is as follows: the gas firstly enters from the gas inlet of the primary regulating door, sequentially passes through the primary regulating door, the primary gas inlet box, the primary gas inlet, the primary shell group and the primary fan impeller, the pressure of the gas rises after the primary fan impeller works, then the gas with the increased pressure enters the secondary regulating door, sequentially passes through the secondary gas inlet box, the secondary gas inlet, the secondary shell group and the secondary fan impeller, works through the secondary fan impeller, the pressure of the gas further rises to meet the pressure requirement, and finally the gas is discharged through the outlet of the secondary shell group.
The technical scheme has the advantages that ① is compact in structural design, convenient to install and reliable in operation, occupied space is small during installation, use space is saved, pressure of gas is improved through two-stage pressurization, performance requirements are met, only one driving device is arranged in ②, the primary ventilation unit and the secondary ventilation unit can be driven to operate, and cost is saved.
Furthermore, a bent pipe is communicated between the air outlet of the first-stage shell group and the air inlet of the second-stage adjusting door. The elbow is used for communication, so that the occupied space of the device can be reduced.
Furthermore, the primary air inlet box and the secondary air inlet box are isolated by an air inlet box shared side plate. And the gas in the secondary air inlet box is all the gas pressurized by the primary fan impeller, so that the pressurization of the gas is ensured.
Further, still include drive unit and follower lever, the direction contained angle of admitting air between one-level regulation door and the second grade regulation door is 180, be equipped with the first axis of rotation that is used for opening and close one-level regulation door on the one-level regulation door, be equipped with the second axis of rotation that is used for opening and close the second grade regulation door on the second grade regulation door, drive unit is used for driving first axis of rotation to rotate, first axis of rotation drives the rotation of second axis of rotation through the follower lever. The arrangement can synchronously adjust the first-stage adjusting door and the second-stage adjusting door, and the external dimensions of the first-stage adjusting door and the second-stage adjusting door are reduced, so that the occupied space is reduced.
Further, the driving unit comprises an electric actuator handle and a driving rod, the driving rod is connected with the electric actuator handle, and the driving rod is used for driving the first rotating shaft to rotate. The electric actuator handle can drive the first rotating shaft to rotate through the driving rod, so that the operation is simpler and more convenient.
Furthermore, be fixed with one-level regulation door transmission handle on the first axis of rotation, be fixed with second grade regulation door transmission handle on the second axis of rotation, the driving lever is connected with one-level regulation door transmission handle, the both ends of driven lever are articulated with one-level regulation door transmission handle and second grade regulation door transmission handle respectively. The driving rod drives the first-stage adjusting door transmission handle and the first rotating shaft to rotate, and the first-stage adjusting door transmission handle drives the second-stage adjusting door transmission handle and the second rotating shaft to rotate through the driven rod, so that the first-stage adjusting door is opened
Furthermore, both sides of main shaft are equipped with location bearing and non-location bearing respectively, primary fan impeller and second grade fan impeller are located the both sides of main shaft respectively and keep away from the center of main shaft. The main shaft bending moment at the position of the impeller can be reduced, the diameter of the middle section of the main shaft is reduced, and the manufacturing cost is reduced.
Further, the primary fan impeller is positioned on one side close to the non-positioning bearing, and the secondary fan impeller is positioned on one side close to the positioning bearing.
Drawings
Fig. 1 is a perspective view of a two-stage centrifugal fan with impeller inlets arranged oppositely according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic structural diagram of a primary adjustment gate and a secondary adjustment gate;
FIG. 4 is a perspective view of a primary adjustment gate;
FIG. 5 is a distribution of the primary and secondary fan wheels on the main shaft.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the air conditioner comprises a primary adjusting door 11, a primary air inlet box 12, a primary air inlet 13, a primary machine shell group 14, a main shaft 15, a secondary adjusting door 21, a secondary air inlet box 22, a secondary air inlet 23, a secondary machine shell group 24, a bent pipe 31, an air inlet box shared side plate 32, a first rotating shaft 41, a primary adjusting door transmission handle 42, a second rotating shaft 51, a secondary adjusting door transmission handle 52, a driving rod 61, a driven rod 62, an electric actuator handle 63, a primary fan impeller 71, a secondary fan impeller 72, a positioning bearing 73 and a non-positioning bearing 74.
The embodiment is basically as shown in the attached figures 1-2: a double-stage centrifugal ventilator with oppositely arranged impeller inlets comprises a primary ventilation unit and a secondary ventilation unit, wherein the primary ventilation unit comprises a primary adjusting door 11, a primary air inlet box 12, a primary air inlet 13, a primary machine shell group 14, a main shaft 15 and a primary fan impeller 71, and the main shaft 15 is connected with a motor through a coupler. The secondary ventilation unit comprises a secondary fan impeller 72, a secondary air inlet box 22, a secondary adjusting door 21, a secondary air inlet 23 and a secondary shell group 24 which is connected with the primary shell group 14 in series; the primary fan impeller 71 is located in the primary housing group 14, the secondary fan impeller 72 is located in the secondary housing group 24, the main shaft 15 sequentially penetrates through the primary housing group 14, the primary fan impeller 71, the primary air inlet 13, the primary air inlet box 12, the air inlet box shared side plate 32, the secondary air inlet box 22, the secondary air inlet 23, the secondary fan impeller 72 and the secondary housing group 24, the primary fan impeller 71 and the secondary fan impeller 72 are fixed on the main shaft 15, and the rest parts are rotatably connected to the main shaft 15. The primary adjusting door 11, the primary air inlet box 12, the primary air inlet 13 and the primary shell group 14 are sequentially communicated, the secondary adjusting door 21, the secondary air inlet box 22, the secondary air inlet and the secondary shell group 24 are sequentially communicated, an air outlet of the primary shell group 14 is communicated with an air inlet of the secondary adjusting door 21 through an elbow pipe 31, and the primary air inlet box 12 and the secondary air inlet box 22 are isolated through an air inlet box shared side plate 32.
As shown in fig. 3 and 4, the device further includes a driving unit, a first rotating shaft 41 for opening and closing the first-stage adjusting door 11 is rotatably connected to the first-stage adjusting door 11, and a second rotating shaft 51 for opening and closing the second-stage adjusting door 21 is rotatably connected to the second-stage adjusting door 21. A first-stage adjusting door transmission handle 42 is fixed on the first rotating shaft 41, a second-stage adjusting door transmission handle 52 is fixed on the second rotating shaft 51, and a driven rod 62 is hinged between the first-stage adjusting door transmission handle 42 and the second-stage adjusting door transmission handle 52. The driving unit comprises an electric actuator handle 63 and a driving rod 61, and two ends of the driving rod 61 are respectively connected with the electric actuator handle 63 and the primary adjusting door transmission handle 42.
As shown in fig. 5, the primary fan impeller 71 and the secondary fan impeller 72 are respectively located on both sides of the main shaft 15 and away from the center of the main shaft 15, the primary fan impeller 71 is located on the side close to the non-positioning bearing 74, and the secondary fan impeller 72 is located on the side close to the positioning bearing 73. The bending moment of the main shaft 15 at the position of the impeller can be reduced, the diameter of the middle section of the main shaft 15 is reduced, and the manufacturing cost is reduced.
The specific implementation process is as follows: the electric actuator handle 63 drives the first-stage adjusting door transmission handle 42 and the first rotating shaft 41 to rotate through the driving rod 61, and the first rotating shaft 41 rotates to open the first-stage adjusting door 11. Meanwhile, the first-stage adjusting door transmission handle 42 drives the second-stage adjusting door transmission handle 52 and the second rotating shaft 51 to rotate through the driven rod 62, so that the first-stage adjusting door 11 is opened, and the synchronous opening of the first-stage adjusting door 11 and the second-stage adjusting door 21 is realized. The gas firstly enters from the gas inlet of the primary adjusting door 11, sequentially passes through the primary adjusting door 11, the primary gas inlet box 12, the primary gas inlet 13, the primary shell group 14 and the primary fan impeller, the gas pressure rises after the work is done by the primary fan impeller 71, then the gas with the raised pressure enters the bent pipe 31, sequentially passes through the secondary adjusting door 21, the secondary gas inlet box 22, the secondary gas inlet, the secondary shell group 24 and the secondary fan impeller 72, the work is done by the secondary fan impeller 72, the gas pressure further rises to reach the pressure requirement, and finally the gas is discharged through the outlet of the secondary shell group 24.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (8)
1. The utility model provides a doublestage centrifugal fan that impeller import was arranged relatively which characterized in that: the device comprises a primary ventilation unit and a secondary ventilation unit, wherein the primary ventilation unit comprises a primary adjusting door, a primary air inlet box, a primary air inlet, a primary machine shell group, a main shaft and a primary fan impeller, and the main shaft is connected with a driving device; the secondary ventilation unit comprises a secondary fan impeller, a secondary air inlet box, a secondary adjusting door, a secondary air inlet and a secondary machine shell group which is connected with the primary machine shell group in series; the primary fan impeller is positioned in the primary machine shell group, and the secondary fan impeller is positioned in the secondary machine shell group; the main shaft sequentially passes through the primary machine shell group, the primary fan impeller, the primary air inlet box, the shared side plate of the air inlet box, the secondary air inlet, the secondary fan impeller and the secondary machine shell group, wherein the primary fan impeller and the secondary fan impeller are fixed on the main shaft, and the rest parts are rotationally connected to the main shaft; the air conditioner comprises a shell, a first-level adjusting door, a first-level air inlet box, a first-level air inlet and a first-level shell group, wherein the first-level adjusting door, the first-level air inlet box, the first-level air inlet and the first-level shell group are sequentially communicated, a second-level adjusting door, a second-level air inlet box, a second-level air inlet and the second-level shell group are sequentially communicated, and.
2. The dual-stage centrifugal fan with opposed impeller inlets of claim 1, wherein: and a bent pipe is communicated between the air outlet of the first-stage shell group and the air inlet of the second-stage adjusting door.
3. The dual-stage centrifugal fan with opposed impeller inlets of claim 1, wherein: the first-stage air inlet box and the second-stage air inlet box are isolated by a side plate shared by the air inlet boxes.
4. The dual-stage centrifugal fan with opposed impeller inlets of claim 1, wherein: still include drive unit and follower lever, the direction contained angle that admits air between one-level regulation door and the second grade regulation door is 180, be equipped with the first axis of rotation that is used for opening and close one-level regulation door on the one-level regulation door, be equipped with the second axis of rotation that is used for opening and close the second grade regulation door on the second grade regulation door, drive unit is used for driving first axis of rotation to rotate, first axis of rotation drives the rotation of second axis of rotation through the follower lever.
5. The dual-stage centrifugal fan with opposed impeller inlets of claim 4, wherein: the driving unit comprises an electric actuator handle and a driving rod, the driving rod is connected with the electric actuator handle, and the driving rod is used for driving the first rotating shaft to rotate.
6. The dual-stage centrifugal fan with opposed impeller inlets of claim 5, wherein: the first rotating shaft is fixedly provided with a first-stage adjusting door transmission handle, the second rotating shaft is fixedly provided with a second-stage adjusting door transmission handle, the driving rod is connected with the first-stage adjusting door transmission handle, and two ends of the driven rod are respectively hinged with the first-stage adjusting door transmission handle and the second-stage adjusting door transmission handle.
7. The dual-stage centrifugal fan with opposed impeller inlets of claim 1, wherein: the two sides of the main shaft are respectively provided with a positioning bearing and a non-positioning bearing, and the primary fan impeller and the secondary fan impeller are respectively positioned on the two sides of the main shaft and far away from the center of the main shaft.
8. The dual-stage centrifugal fan with opposed impeller inlets of claim 7, wherein: the primary fan impeller is positioned on one side close to the non-positioning bearing, and the secondary fan impeller is positioned on one side close to the positioning bearing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920963753.0U CN210371233U (en) | 2019-06-25 | 2019-06-25 | Two-stage centrifugal ventilator with impeller inlets arranged oppositely |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920963753.0U CN210371233U (en) | 2019-06-25 | 2019-06-25 | Two-stage centrifugal ventilator with impeller inlets arranged oppositely |
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| CN210371233U true CN210371233U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173446A (en) * | 2019-06-25 | 2019-08-27 | 重庆通用工业(集团)有限责任公司 | A kind of two stage centrifugal ventilation blower that impeller inlet is positioned opposite |
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2019
- 2019-06-25 CN CN201920963753.0U patent/CN210371233U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173446A (en) * | 2019-06-25 | 2019-08-27 | 重庆通用工业(集团)有限责任公司 | A kind of two stage centrifugal ventilation blower that impeller inlet is positioned opposite |
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