CN204476808U - Single double suction centrifugal ventilator with adjustable - Google Patents
Single double suction centrifugal ventilator with adjustable Download PDFInfo
- Publication number
- CN204476808U CN204476808U CN201520056552.4U CN201520056552U CN204476808U CN 204476808 U CN204476808 U CN 204476808U CN 201520056552 U CN201520056552 U CN 201520056552U CN 204476808 U CN204476808 U CN 204476808U
- Authority
- CN
- China
- Prior art keywords
- impeller
- spiral case
- dividing plate
- flow
- blade
- 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.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008676 import Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of single double suction centrifugal ventilator with adjustable.When ventilator runs under low discharge, flow instabilities state can occur, noise raises, and has a strong impact on operational efficiency.Two slip rings of the present utility model are fixed on the ingress of spiral case both sides, and are communicated with the outlet side of an inlet box respectively; The air inlet end of two inlet boxs is all communicated with intake elbow; Intake elbow is provided with three-way valve at bend place; Diffuser is fixed on the outlet port of spiral case; Longitudinal section, the center place of spiral case is provided with runner dividing plate; Impeller assembly comprises the first impeller and the second impeller that are arranged on runner dividing plate both sides.The utility model, when air flow rate is larger, adopts double feed inlet double-sucking type, improves stagnation pressure and the efficiency of centrifugal blower, expands the range of operation under large discharge; When flow is less, adopt single import single-suction, reduce the generation of wild effect, reduce flow losses, expand the reasonable range of operation of centrifugal blower under small flow.
Description
Technical field
The utility model belongs to field of ventilation equipment, relates to centrifugal blower, is specifically related to a kind of single double suction centrifugal ventilator with adjustable.
Background technique
Centrifugal blower is primarily of structure compositions such as slip ring, impeller, spiral case and diffusers.Gas is through slip ring guide vane wheel, and under the turning effort of impeller, pressure raises.From impeller gas out, collected by spiral case and guide to volute outlet, and after after diffuser again diffusion, be transported to pipeline or enter in air.
When ventilator runs under small flow, the normal flow phenomenon occurred mainly comprises separation, vortex, the separation of flow, tail etc., also often inevitably occurs secondary flow.The existence from start to finish under whole service operating mode of these unsteady complex flows, they are the roots causing centrifugal blower energy loss and noise to increase.In addition, the safety and reliability of the unstability flowing state influential system work occurred in centrifugal blower.The unstability flowing state of centrifugal blower comprises rotating stall and surge etc.Rotating stall is when the flow of turbomachine reduces to certain limit, one or several stall group formed in leaf runner, and these stall group rotates with the sense of rotation contrary with impeller; Surge is then the flow of turbomachine when being reduced to lower a certain limit, a kind of large amplitude occurred in turbomachine and pipeline, low-frequency reforming phenomena.To sum up, when ventilator runs under low discharge, flow instabilities state can occur, cause flow unstable, flow losses are increased, noise raises, and drastically influence the operational efficiency of ventilator, even likely causes the generation of catastrophic failure.Therefore in order to improve the performance of centrifugal blower, strengthen the safety and reliability of centrifugal blower work, ventilator should be avoided to run under small flow as far as possible.
Existing centrifugal blower can be divided into single-suction and double-sucking type, and double-sucking type centrifugal blower, from the air inlet of impeller two sides, has more advantages compared with single-suction centrifugal fan.As, when two kinds of ventilator performance parameters are identical, because the flow coefficient of double-sucking type ventilator is larger, therefore little compared with single-suction of its impeller diameter, rotor flywheel moment also reduces thereupon, can reduce the power of starting electrical machinery thus and shorten starting time of blower fan, this is concerning very important huge blower fan; The impeller diameter of double-sucking type centrifugal blower is less, makes manufacture, transport and installation all more convenient; Air is that the bearing load on two sides is identical from impeller two side inflow double-entry impeller, substantially can eliminate the axial force on impeller.One side exhauster then needs a thrust-bearing, and is needing a heavy bearing near impeller place; Double-sucking type centrifugal blower all adopts double supporting structure, and operating reliability is high.
For double-sucking type centrifugal blower, when air flow rate is less, if be adjustable as single-suction, air-flow is entered by one-sided entrance, and the air flow rate in impeller increases relatively, then effectively can avoid the generation of ventilator wild effect under small flow, improve the stability of air-flow in impeller channel, reduce flow losses, improve fan efficiency, reduce noise.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, a kind of single double suction centrifugal ventilator with adjustable is provided, this ventilator adopts three-way valve at air inlet bend place, and impeller is divided into two-part, respectively by different driven by motor, double-sucking type or single-suction can be selected according to the size of flow, the range of flow of centrifugal blower is expanded, reduce the generation of wild effect in double-sucking type centrifugal blower under low discharge, reduce the energy consumption of motor; Between impeller and spiral case, add runner dividing plate, the gas stream make impact from the outflow of both sides impeller and blending can be avoided, reduce flow losses; Volute outlet place arranges butterfly shaped check valve, and when can avoid adopting single suction pattern, air-flow refluxes to opposite side blower fan runner in ventilator outlet port.
The utility model comprises air inlet system, impeller assembly, spiral case, runner dividing plate, diffuser, main shaft and motor; Described air inlet system comprises intake elbow, inlet box and slip ring; Two slip rings are fixed on the ingress of spiral case both sides, and are communicated with the outlet side of an inlet box respectively; The air inlet end of two inlet boxs is all communicated with intake elbow; Described intake elbow is provided with three-way valve at bend place; Described diffuser is fixed on the outlet port of spiral case, and is provided with butterfly shaped check valve between the outlet of spiral case and diffuser; Longitudinal section, the center place of described spiral case is provided with runner dividing plate, and the runner in spiral case is separated into the two-part mutually closed by runner dividing plate; Described impeller assembly integral is arranged in spiral case, comprises the first impeller and the second impeller that are arranged on runner dividing plate both sides; The first described impeller and the second impeller include blade and are fixed on shroud and the hub disk at blade two ends; The shroud of the first impeller and the second impeller is fixed with a main shaft respectively; Two main shafts are coaxially arranged, and drive respectively by a motor.
The first described impeller and the second impeller include 3 ~ 16 circumferentially uniform blades; The shape of described blade can be straight plate shape, arc plate shape or airfoil; First impeller and the second impeller can be symmetricly set on runner dividing plate both sides, also the blade of corresponding second impeller of blade of the first impeller can rotate 5 ~ 10 ° of layouts around the shaft axis of the first impeller.
The beneficial effects of the utility model:
The utility model by arranging three-way valve in intake elbow, the impeller of double-sucking type centrifugal blower is divided into two-part, respectively by different driven by motor, and runner dividing plate is set in spiral case, at volute outlet, place arranges safety check, makes common double-sucking type centrifugal blower become single double suction adjustable.When air flow rate is larger, adopts double feed inlet double-sucking type, effectively can improve stagnation pressure and the efficiency of centrifugal blower, expand the range of operation under centrifugal blower large discharge; When flow is less, adopt single import single-suction, effectively can reduce the generation of ventilator wild effect when small flow runs, improve the stability of air-flow in impeller channel, reduce flow losses, expand the reasonable range of operation under centrifugal blower small flow.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the schematic side view of Fig. 1;
Fig. 3 is the structural perspective of the utility model middle period wheel assembly.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1,2 and 3, single double suction centrifugal ventilator with adjustable, comprises air inlet system, impeller assembly 5, spiral case 6, runner dividing plate 7, diffuser 8, main shaft 10 and motor 11; Air inlet system comprises intake elbow 1, inlet box 3 and slip ring 4; Two slip rings 4 are fixed on the ingress of spiral case 6 both sides, and are communicated with the outlet side of an inlet box 3 respectively; The air inlet end of two inlet boxs 3 is all communicated with intake elbow 1; Intake elbow 1 is provided with three-way valve 2 at bend place; Diffuser 8 is fixed on the outlet port of spiral case 6, and is provided with butterfly shaped check valve 9 between the outlet of spiral case 6 and diffuser 8; Longitudinal section, the center place of spiral case 6 is provided with runner dividing plate 7, and the runner in spiral case 6 is separated into the two-part mutually closed by runner dividing plate 7; Impeller assembly 5 is integrally provided in spiral case 6, comprises the first impeller and the second impeller that are arranged on runner dividing plate 7 both sides; First impeller and the second impeller include blade 5-3 and are fixed on shroud 5-1 and the hub disk 5-2 at blade 5-3 two ends; The shroud 5-1 of the first impeller and the second impeller fixes with a main shaft 10 respectively; Two main shafts 10 are coaxially arranged, and drive respectively by a motor 11.
As shown in Figure 3, the first impeller and the second impeller include 12 circumferentially uniform blade 5-3; The shape of blade 5-3 can be straight plate shape, arc plate shape or airfoil; First impeller and the second impeller can be symmetricly set on runner dividing plate 7 both sides, also can the arbitrary value of blade in the shaft axis of the first impeller rotates 5 ~ 10 ° of corresponding second impeller of blade of the first impeller.
This single double suction centrifugal ventilator with adjustable, three-way valve 2 is set in intake elbow 1, impeller assembly 5 is divided into the first impeller and the second impeller, and driven by different motors 11 respectively, and runner dividing plate 7 is set in spiral case 6, when air flow rate is larger, adopt double feed inlet double-sucking type, effectively can improve stagnation pressure and the efficiency of centrifugal blower, expand the range of operation under centrifugal blower large discharge; When flow is less, adopt single import single-suction, effectively can reduce the generation of ventilator wild effect when small flow runs, improve the stability of air-flow in impeller channel, reduce flow losses, expand the reasonable range of operation under centrifugal blower small flow.The outlet port of spiral case 6 arranges butterfly shaped check valve 9, and when can prevent from adopting single suction pattern, air-flow is refluxed to opposite side blower fan runner by volute outlet.
Claims (2)
1. single double suction centrifugal ventilator with adjustable, comprises air inlet system, impeller assembly, spiral case, runner dividing plate, diffuser, main shaft and motor, it is characterized in that:
Described air inlet system comprises intake elbow, inlet box and slip ring; Two slip rings are fixed on the ingress of spiral case both sides, and are communicated with the outlet side of an inlet box respectively; The air inlet end of two inlet boxs is all communicated with intake elbow; Described intake elbow is provided with three-way valve at bend place; Described diffuser is fixed on the outlet port of spiral case, and is provided with butterfly shaped check valve between the outlet of spiral case and diffuser; Longitudinal section, the center place of described spiral case is provided with runner dividing plate, and the runner in spiral case is separated into the two-part mutually closed by runner dividing plate; Described impeller assembly integral is arranged in spiral case, comprises the first impeller and the second impeller that are arranged on runner dividing plate both sides; The first described impeller and the second impeller include blade and are fixed on shroud and the hub disk at blade two ends; The shroud of the first impeller and the second impeller is fixed with a main shaft respectively; Two main shafts are coaxially arranged, and drive respectively by a motor.
2. single double suction centrifugal ventilator with adjustable according to claim 1, is characterized in that: the first described impeller and the second impeller include 3 ~ 16 circumferentially uniform blades; The shape of described blade is straight plate shape, arc plate shape or airfoil; First impeller and the second impeller are symmetricly set on runner dividing plate both sides, or the blade of corresponding second impeller of the blade of the first impeller rotates 5 ~ 10 ° of layouts around the shaft axis of the first impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056552.4U CN204476808U (en) | 2015-01-27 | 2015-01-27 | Single double suction centrifugal ventilator with adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056552.4U CN204476808U (en) | 2015-01-27 | 2015-01-27 | Single double suction centrifugal ventilator with adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204476808U true CN204476808U (en) | 2015-07-15 |
Family
ID=53632601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520056552.4U Expired - Fee Related CN204476808U (en) | 2015-01-27 | 2015-01-27 | Single double suction centrifugal ventilator with adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204476808U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653496A (en) * | 2015-01-27 | 2015-05-27 | 浙江理工大学 | Single-double-suction adjustable centrifugal ventilator |
-
2015
- 2015-01-27 CN CN201520056552.4U patent/CN204476808U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653496A (en) * | 2015-01-27 | 2015-05-27 | 浙江理工大学 | Single-double-suction adjustable centrifugal ventilator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104653496B (en) | A kind of single double suction centrifugal ventilator with adjustable | |
| CN205349788U (en) | A axial compressor end wall is handled for controlling wherein leakage stream | |
| CN201560963U (en) | High-efficiency axial flow fan | |
| CN104421199B (en) | The asymmetrical bilateral turbo-charger impeller of function and diffuser | |
| CN102678590B (en) | Ultra-compact high pressure ratio oblique flow-centrifugal combined compressor structure | |
| CN104895841B (en) | Rectifier, flow passage structure, combined compressor, aero gas turbine engine | |
| WO2018146753A1 (en) | Centrifugal compressor and turbocharger | |
| WO2015064227A1 (en) | Centrifugal compressor for gas pipeline, and gas pipeline | |
| CN104632701A (en) | High-bypass-ratio turbo-fan engine fan long-short blade structure | |
| US20160281727A1 (en) | Apparatus, system, and method for compressing a process fluid | |
| WO2015061344A1 (en) | Centrifugal turbomachine diffuser with large vaneless portion upstream of a small vaned portion | |
| CN201891675U (en) | Centrifugal tunnel axial blower | |
| CN106762139A (en) | A kind of gas turbine with embedded blade | |
| CN201526473U (en) | Axial flow compressor formed by connecting a plurality of single-stage axial flow fans in series | |
| CN204476808U (en) | Single double suction centrifugal ventilator with adjustable | |
| CN201358959Y (en) | Multistage centrifugal blower | |
| CN202228423U (en) | Centrifugal air blower of double-suction semi-open type impeller | |
| CN105090122A (en) | Centrifugal fan and vaneless diffuser thereof | |
| CN205331052U (en) | Impeller of organic airfoil fan of counter -rotating fan apparatus | |
| CN204692190U (en) | A kind of vane diffuser with deviated splitter vane | |
| CN203189329U (en) | Centrifugal fan for the cement industry | |
| CN205823750U (en) | Radially adjustable inlet guide vane for radial-flow gas turbine | |
| CN201991818U (en) | Through-flow fan bearing seat applied on air conditioner | |
| CN111963461A (en) | Novel disrotatory fan | |
| CN103016369A (en) | Novel axial-flow fan with small-aspect-ratio blades having obliquely-cut and twisted blade roots |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20170127 |