CN106438467A - Centrifugal fan and variable work condition adjustment method thereof - Google Patents
Centrifugal fan and variable work condition adjustment method thereof Download PDFInfo
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- CN106438467A CN106438467A CN201611090472.6A CN201611090472A CN106438467A CN 106438467 A CN106438467 A CN 106438467A CN 201611090472 A CN201611090472 A CN 201611090472A CN 106438467 A CN106438467 A CN 106438467A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000001595 flow curve Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- F04D29/287—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps with adjusting means
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明公开了一种离心风机及其变工况调节方法，特别是一种离心风机变工况调节方法，需要改变工况点时，停止风机叶轮转动，根据风机综合性能曲线，选择合适的叶轮出口宽度；取下螺栓(8)，拉动拉环(7)，使拉杆(10)水平移动，选择准确的定位孔(9)位置；安装螺栓(8)，固定移动后盘(3)，开启风机启动按钮，离心风机叶轮正常作业。本发明通过改变叶轮宽度，改变风机流量及风机特性曲线。相对于前导器调节及节流调节，可扩大工作范围，提高系统效率和调节效率，相较于变转速调节，可节约成本，经济性好。
The invention discloses a centrifugal fan and its variable working condition adjustment method, in particular to a centrifugal fan variable working condition adjustment method. When the working condition point needs to be changed, the impeller of the fan is stopped to rotate, and a suitable impeller is selected according to the comprehensive performance curve of the fan. Exit width; remove the bolt (8), pull the pull ring (7) to make the pull rod (10) move horizontally, select the accurate position of the positioning hole (9); install the bolt (8), fix the moving rear plate (3), and open Fan start button, centrifugal fan impeller works normally. The invention changes the flow rate of the fan and the characteristic curve of the fan by changing the width of the impeller. Compared with pilot adjustment and throttling adjustment, it can expand the working range, improve system efficiency and adjustment efficiency, and compared with variable speed adjustment, it can save costs and has good economy.
Description
技术领域technical field
本发明属于风机技术领域，具体涉及一种离心风机及其变工况调节方法。The invention belongs to the technical field of fans, and in particular relates to a centrifugal fan and a variable working condition adjustment method thereof.
背景技术Background technique
离心风机的工况调节是指由于外界负荷的变化要求改变其工况点，用人为的方法改变工况点参数。因为工况点是由风机特性曲线和管路特性曲线的交点所决定的，所以调节工况点的方式有三种：改变风机的特性曲线；改变管路特性曲线；二者同时改变。基于叶轮宽度的调节措施主要改变的是叶轮出口宽度b2，根据欧拉方程进而改变风机的特性曲线，达到变工况调节的目的。目前离心风机工况调节的措施主要有节流调节、入口导叶(导流器)调节、变转速调节等。节流调节损失严重，前导器调节系统效率和调节效率较低，而变转速调节则成本较高。The working condition adjustment of the centrifugal fan refers to the change of the working condition point due to the change of the external load, and the parameter of the working condition point is changed artificially. Because the operating point is determined by the intersection of the fan characteristic curve and the pipeline characteristic curve, there are three ways to adjust the operating point: changing the fan characteristic curve; changing the pipeline characteristic curve; changing both at the same time. The adjustment measures based on the impeller width mainly change the impeller outlet width b 2 , according to the Euler equation Then change the characteristic curve of the fan to achieve the purpose of adjusting the working conditions. At present, the measures for adjusting the working conditions of centrifugal fans mainly include throttling adjustment, inlet guide vane (deflector) adjustment, and variable speed adjustment. The throttling adjustment loss is serious, the pilot adjustment system efficiency and adjustment efficiency are low, and the variable speed adjustment is costly.
发明内容Contents of the invention
本发明的目的是改进现有技术不足之处，提供一种离心风机及其变工况调节方法。The purpose of the present invention is to improve the deficiencies of the prior art, and provide a centrifugal blower and its variable working condition adjustment method.
为实现上述目的，本发明采用以下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种离心风机包括叶轮，其特征在于，所述叶轮上设有前盘及移动后盘，所述移动后盘上设有通槽，所述通槽贯穿设有叶片，所述叶片两端分别焊接有前盘及固定后盘，所述固定后盘上设有4个沿中心圆分布的通孔，所述通孔贯通有拉杆，所述拉杆一端与移动后盘焊接，另一端通过联轴器。A centrifugal fan comprising an impeller, characterized in that the impeller is provided with a front plate and a movable rear plate, the movable rear plate is provided with a through groove, and the through groove is provided with blades, and the two ends of the blades are respectively The front plate and the fixed rear plate are welded. The fixed rear plate is provided with 4 through holes distributed along the center circle. The through holes are connected with a tie rod. device.
进一步，所述联轴器与主轴相连，所述联轴器两侧设有通过定位孔固定移动后盘的螺栓。Further, the coupling is connected to the main shaft, and bolts are provided on both sides of the coupling to fix and move the rear disc through positioning holes.
进一步，所述拉杆上设有定位孔，所述定位孔沿拉杆均匀分布。Further, positioning holes are provided on the pull rod, and the positioning holes are evenly distributed along the pull rod.
进一步，所述移动后盘通过定位孔改变位置。Further, the moving disc changes its position through the positioning hole.
一种离心风机变工况调节方法，其特征在于，包括以下步骤：A centrifugal fan variable working condition adjustment method is characterized in that it comprises the following steps:
A、需要改变工况点时，停止风机叶轮转动，根据风机综合性能曲线，选择合适的叶轮出口宽度；A. When the working point needs to be changed, stop the rotation of the fan impeller, and select the appropriate width of the outlet of the impeller according to the comprehensive performance curve of the fan;
B、取下螺栓，拉动拉环，使拉杆水平移动，选择准确的定位孔位置；B. Remove the bolt, pull the pull ring, move the pull rod horizontally, and select the accurate position of the positioning hole;
C、安装螺栓，固定移动后盘，开启风机启动按钮，离心风机叶轮正常作业。C. Install the bolts, fix the moving rear plate, turn on the fan start button, and the impeller of the centrifugal fan will work normally.
本发明的有益效果为：本发明通过改进，通过改变叶轮宽度从而改变风机流量，进而改变风机特性曲线。相对于前导器调节，叶轮宽度调节可扩大工作范围，提高系统效率和调节效率，是一种高效的节能措施。相较于变转速调节，可节约成本，经济性好。The beneficial effects of the present invention are: the present invention changes the flow rate of the fan by changing the width of the impeller through the improvement, and then changes the characteristic curve of the fan. Compared with the leader adjustment, the impeller width adjustment can expand the working range, improve the system efficiency and adjustment efficiency, and is an efficient energy-saving measure. Compared with variable speed adjustment, it can save costs and has good economy.
附图说明Description of drawings
图1是本发明结构示意图。Fig. 1 is a schematic diagram of the structure of the present invention.
图2是本发明移动后盘结构示意图。Fig. 2 is a schematic diagram of the structure of the mobile rear disk in the present invention.
图3是某一型号的离心风机性能曲线。Figure 3 is a performance curve of a certain type of centrifugal fan.
图4是某一型号的离心风机效率-流量曲线。Figure 4 is the efficiency-flow curve of a certain type of centrifugal fan.
图5是某一型号的离心风机压力-流量曲线。Figure 5 is the pressure-flow curve of a certain type of centrifugal fan.
图中：1、前盘；2、叶片；3、移动后盘；4、固定后盘；5、联轴器；6、主轴；7、拉环；8、螺栓；9、定位孔；10、拉杆；11、通孔；12、通槽。In the figure: 1. Front disc; 2. Blade; 3. Moving rear disc; 4. Fixed rear disc; 5. Coupling; 6. Main shaft; 7. Pull ring; 8. Bolt; 9. Positioning hole; 10. Pull rod; 11, through hole; 12, through groove.
具体实施方式detailed description
下面结合附图对本发明作进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
如图1、图2所示的一种离心风机，包括叶轮，其特征在于，所述叶轮上设有前盘1及移动后盘3，所述移动后盘3上设有通槽12，所述通槽12贯穿设有叶片2，所述叶片2两端分别焊接有前盘1及固定后盘4，所述固定后盘4上设有4个沿中心圆分布的通孔11，所述通孔11贯通有拉杆10，所述拉杆10一端与移动后盘3焊接，另一端通过联轴器5。A kind of centrifugal fan as shown in Fig. 1, Fig. 2, comprise impeller, it is characterized in that, described impeller is provided with front disk 1 and moving rear disk 3, and described moving rear disk 3 is provided with through groove 12, so The through groove 12 is provided with blades 2, and the two ends of the blades 2 are respectively welded with a front plate 1 and a fixed rear plate 4, and the fixed rear plate 4 is provided with four through holes 11 distributed along the central circle. A pull rod 10 runs through the through hole 11 , one end of the pull rod 10 is welded to the moving rear plate 3 , and the other end passes through the shaft coupling 5 .
进一步，所述联轴器5与主轴6相连，所述联轴器5两侧设有通过定位孔9固定移动后盘3的螺栓8。Further, the coupling 5 is connected to the main shaft 6 , and the two sides of the coupling 5 are provided with bolts 8 through positioning holes 9 to fix and move the rear plate 3 .
进一步，所述拉杆10上设有定位孔9，所述定位孔9沿拉杆10均匀分布。Further, the tie rod 10 is provided with positioning holes 9 , and the positioning holes 9 are evenly distributed along the tie rod 10 .
进一步，所述移动后盘3通过定位孔9改变位置，从而改变移动后盘3的位置，进而改变叶轮出口宽度，改变风机流量、压力。Further, the position of the moving rear plate 3 is changed through the positioning hole 9, thereby changing the position of the moving rear plate 3, further changing the width of the impeller outlet, and changing the flow rate and pressure of the fan.
一种离心风机变工况调节方法，其特征在于，包括以下步骤：A centrifugal fan variable working condition adjustment method is characterized in that it comprises the following steps:
A、需要改变工况点时，停止风机叶轮转动，根据风机综合性能曲线，选择合适的叶轮出口宽度；A. When the working point needs to be changed, stop the rotation of the fan impeller, and select the appropriate width of the outlet of the impeller according to the comprehensive performance curve of the fan;
B、取下螺栓8，拉动拉环7，使拉杆10水平移动，选择准确的定位孔9位置，改变叶轮出口宽度；B. Remove the bolt 8, pull the pull ring 7, make the pull rod 10 move horizontally, select the accurate position of the positioning hole 9, and change the width of the impeller outlet;
C、安装螺栓8，固定移动后盘3，开启风机启动按钮，离心风机叶轮正常作业。C. Install bolt 8, fix and move the rear plate 3, turn on the fan start button, and the impeller of the centrifugal fan can work normally.
如图3、图4及图5所示，以某一型号的离心风机为例，选型叶轮为离心风机的原始叶轮，即100％b2。根据工程实际需要，假如工程中需要流量满足6m3/s，此时若风机叶轮为100％b2，则其效率为84.86％。当工程需要的流量变为4.5m3/s，若风机叶轮仍为100％b2，则其效率为75.34％，但若调节叶轮宽度至90％b2，则风机效率变为77.93％。效率的提高意味着耗电量减小。As shown in Figure 3, Figure 4 and Figure 5, taking a certain type of centrifugal fan as an example, the selected impeller is the original impeller of the centrifugal fan, that is, 100% b2. According to the actual needs of the project, if the project requires a flow rate of 6m 3 /s, if the fan impeller is 100% b2, its efficiency is 84.86%. When the flow required by the project becomes 4.5m 3 /s, if the fan impeller is still 100% b2, its efficiency is 75.34%, but if the width of the impeller is adjusted to 90% b2, the fan efficiency becomes 77.93%. Increased efficiency means less power consumption.
本离心风机变工况过程中，先开启风机启动按钮，电机转动，主轴6转动，联轴器5转动，整个叶轮开始旋转。因为外界负荷由工程需要决定，取决于实际需要，故外界负荷发生变化要求改变风机工况点时，可根据综合性能曲线，选择相应的叶轮出口宽度。此时停止离心风机转动，取下螺栓8，拉动拉环7，选择准确的定位孔9位置，安装螺栓8，固定移动后盘3，最后开启风机启动按钮，叶轮开始旋转。In the process of changing working conditions of the centrifugal fan, the start button of the fan is turned on first, the motor rotates, the main shaft 6 rotates, the shaft coupling 5 rotates, and the whole impeller starts to rotate. Because the external load is determined by the engineering needs and depends on the actual needs, when the external load changes and the operating point of the fan is required to be changed, the corresponding impeller outlet width can be selected according to the comprehensive performance curve. At this moment, the centrifugal fan is stopped, the bolt 8 is removed, the pull ring 7 is pulled, the position of the positioning hole 9 is selected, the bolt 8 is installed, the rear plate 3 is fixed and moved, and finally the start button of the fan is turned on, and the impeller starts to rotate.
相较于传统的离心风机调节方法，此叶轮宽度调节由于节能高效，结构简单，操作方便等特性，本离心风机调节方法也可广泛应用于其他中小型离心风机。Compared with the traditional adjustment method of the centrifugal fan, the adjustment method of the centrifugal fan can also be widely used in other small and medium-sized centrifugal fans due to the characteristics of energy-saving and high-efficiency, simple structure, and convenient operation.
本发明公开的一种离心风机及其变工况调节方法，首先开启风机进行作业。当外界负荷发生变化要求改变工况点时，停止风机，选择合适的定位孔9，人工改变螺栓8位置，固定后再重新启动。这种基于叶轮宽度调节的方式大大提高了风机的系统效率及调节效率，从而达到节能的效果。The invention discloses a centrifugal fan and its variable working condition adjustment method. Firstly, the fan is turned on for operation. When the external load changes and the operating point needs to be changed, stop the fan, select a suitable positioning hole 9, manually change the position of the bolt 8, and restart after fixing. This method based on the adjustment of the width of the impeller greatly improves the system efficiency and adjustment efficiency of the fan, thereby achieving the effect of energy saving.
Claims (5)
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| CN201611090472.6A CN106438467A (en) | 2016-12-01 | 2016-12-01 | Centrifugal fan and variable work condition adjustment method thereof |
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Cited By (3)
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| CN107313968A (en) * | 2017-07-13 | 2017-11-03 | 浙江双阳风机有限公司 | A kind of control method of convection rotary type axial flow fan with adjustable moving blades |
| CN108252943A (en) * | 2018-01-08 | 2018-07-06 | 上海理工大学 | Specified centrifugal blower flow and the method for the pressure slope of curve |
| CN114992141A (en) * | 2022-06-20 | 2022-09-02 | 山东省章丘鼓风机股份有限公司 | High-efficient impeller structure of blade adjustable |
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| CN107313968A (en) * | 2017-07-13 | 2017-11-03 | 浙江双阳风机有限公司 | A kind of control method of convection rotary type axial flow fan with adjustable moving blades |
| CN107313968B (en) * | 2017-07-13 | 2019-01-22 | 浙江双阳风机有限公司 | A kind of control method of convection rotary type axial flow fan with adjustable moving blades |
| CN108252943A (en) * | 2018-01-08 | 2018-07-06 | 上海理工大学 | Specified centrifugal blower flow and the method for the pressure slope of curve |
| CN114992141A (en) * | 2022-06-20 | 2022-09-02 | 山东省章丘鼓风机股份有限公司 | High-efficient impeller structure of blade adjustable |
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Application publication date: 20170222 |
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