Air inlet mechanism and classifier shell with same

Abstract

The air inlet mechanism comprises an air inlet window and an annular shell body, the air inlet window comprises an upper ring body and a lower ring body, fan blades are arranged between the upper ring body and the lower ring body, fan blade gaps between the adjacent fan blades are gradually reduced from outside to inside, and the annular shell body is arranged in the annular shell body. The air inlet window is sleeved with the annular shell, an inner cavity of the annular shell is communicated with the fan blade gaps, an air inlet is formed in the annular shell, an air inlet pipe is installed at the air inlet, and the axis direction of the air inlet pipe is parallel to the tangential direction of the upper annular body. Tangential vortex air inlet is adopted, the cross sectional area of the inner cavity of the annular shell is reduced clockwise or anticlockwise from the air inlet, the air speed in the annular shell can be gradually increased, and therefore it is guaranteed that the air force in the air inlet window in the circumferential direction is the same, and the particle classification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an air inlet mechanism and also relates to a classifier casing with the air inlet mechanism. Background Art

[0002] Existing grading equipment has certain shortcomings in its air supply method. Traditionally, this method involves simple direct airflow, which results in uneven wind force distribution. This uneven wind force distribution affects the grading effect of the material, causing the material to be affected by different wind forces at different locations, making it difficult to achieve accurate grading operations. Utility Model Content

[0003] In order to make up for the above shortcomings, the present invention provides an air inlet mechanism that makes the wind force more uniform and ensures the classification effect.

[0004] The technical solution of the present utility model is: an air intake mechanism, including an air intake window and an annular shell, the air intake window including an upper ring body and a lower ring body, fan blades are provided between the upper ring body and the lower ring body, and the fan blade gap between adjacent fan blades gradually decreases from the outside to the inside, the annular shell is sleeved outside the air intake window and the inner cavity of the annular shell and the fan blade gap are connected to each other, an air inlet is provided on the annular shell, and an air inlet pipe is installed on the air inlet, and the axial direction of the air inlet pipe is parallel to the tangent direction of the upper ring body.

[0005] As a preferred technical solution, the cross-sectional area of ​​the inner cavity of the annular shell decreases in a clockwise or counterclockwise direction starting from the air inlet.

[0006] As a preferred technical solution, the inner cavity of the annular shell includes a cross-sectional area reduction section connected to the air inlet and a cross-sectional area consistency section connected to the tail of the cross-sectional area reduction section; in the cross-sectional area reduction section, the cross-sectional area of ​​the inner cavity of the annular shell becomes smaller starting from the air inlet; in the cross-sectional area consistency section, the cross-sectional area of ​​each part of the annular shell remains consistent.

[0007] As a preferred technical solution, the central angle of the cross-sectional area reduction section is greater than 180°.

[0008] As a preferred technical solution, the angle between adjacent fins is 10°-18°.

[0009] As a preferred technical solution, the angle between adjacent fins is 12°.

[0010] As a preferred technical solution, the airflow flows clockwise in the annular housing, and the inner ends of the blades are inclined in the clockwise direction relative to the outer ends.

[0011] As a preferred technical solution, the airflow flows counterclockwise in the annular housing, and the inner ends of the blades are inclined counterclockwise relative to the outer ends.

[0012] As a preferred technical solution, along the diameter direction of the air inlet window, the inner end of the first fan blade of two adjacent fan blades extends into the inner side of the second fan blade.

[0013] The utility model also provides a classifier housing which makes the wind force more uniform and ensures the classifying effect.

[0014] The technical solution of the utility model is: a classifier casing, comprising an outer casing and an inner casing, a classifying wheel is rotatably mounted on the upper end of the inner casing, the air intake mechanism is mounted on the outer casing, an annular groove is provided on the outer casing, the air intake window is fixedly mounted in the annular groove, and the air intake mechanism is the above-mentioned air intake mechanism; a sealing mechanism is provided between the classifying wheel and the inner casing, a feed port is provided on the upper part of the outer casing, a bulk ring sleeved outside the classifying wheel is provided between the feed port and the air intake window, gaps are provided between the outer casing and the classifying wheel, between the bulk ring and the classifying wheel, between the air intake window and the classifying wheel, and between the outer casing and the inner casing, and the gaps are communicated with each other, the lower end of the inner casing is sealed and connected to an induced draft duct, and the induced draft duct is connected to a negative pressure induced draft fan.

[0015] Due to the adoption of the above technical solution, an air inlet mechanism and a classifying machine housing having the same include an air inlet window and an annular housing, the air inlet window includes an upper ring body and a lower ring body, blades are provided between the upper ring body and the lower ring body, the gap between adjacent blades gradually decreases from the outside to the inside, the annular housing is sleeved outside the air inlet window, and the inner cavity of the annular housing and the blade gap are interconnected, the annular housing is provided with an air inlet, the air inlet is equipped with an air inlet pipe, the axial direction of the air inlet pipe is parallel to the tangential direction of the upper ring body. A tangential vortex air inlet is adopted, and the cross-sectional area of ​​the inner cavity of the annular housing decreases in a clockwise or counterclockwise direction starting from the air inlet, the wind speed in the annular housing gradually increases, thereby ensuring that the wind force in the air inlet window is the same along the circumferential direction, thereby improving the particle classification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the classifier housing in an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 AA section view in the figure;

[0018] Figure 3 This is a structural diagram of the air inlet mechanism in an embodiment of the present utility model;

[0019] Figure 4 yes Figure 3 sectional view of

[0020] Figure 5 yes Figure 3 A local enlarged view of point I in the middle. DETAILED DESCRIPTION

[0021] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, an air intake mechanism includes an air intake window 1 and an annular shell 2. The air intake window 1 includes an upper ring body 3 and a lower ring body 4. Blades 5 are provided between the upper ring body 3 and the lower ring body 4. The blade gaps 6 between adjacent blades 5 gradually decrease from the outside to the inside. The annular shell 2 is sleeved outside the air intake window 1, and the inner cavity of the annular shell 2 and the blade gaps 6 are interconnected. The annular shell 2 is provided with an air inlet, and the air inlet is equipped with an air inlet pipe 7. The axial direction of the air inlet pipe 7 is parallel to the tangential direction of the upper ring body 3. The inner cavity cross-sectional area of ​​the annular shell 2 decreases in a clockwise or counterclockwise direction starting from the air inlet. Tangential vortex air intake is achieved. Moreover, the inner cavity cross-sectional area of ​​the annular shell 2 decreases in a clockwise or counterclockwise direction starting from the air inlet. The wind speed in the annular shell 2 gradually increases, thereby ensuring that the wind force in the air intake window is the same along the circumferential direction, thereby improving the particle classification efficiency.

[0022] The inner cavity of the annular housing 2 includes a reduced cross-sectional area section 8 connected to the air inlet and a uniform cross-sectional area section 9 connected to the tail of the reduced cross-sectional area section 8. In the reduced cross-sectional area section 8, the inner cross-sectional area of ​​the annular housing 2 decreases from the air inlet; in the uniform cross-sectional area section 9, the cross-sectional area of ​​the annular housing 2 remains consistent throughout. The provision of the reduced cross-sectional area section and the uniform cross-sectional area section further optimizes the structure of the annular housing's inner cavity. Due to the reduced cross-sectional area section, the airflow velocity at the tail end of the annular housing's inner cavity is higher, eliminating the need for acceleration. Therefore, the uniform cross-sectional area section is provided.

[0023] Preferably, the central angle of the cross-sectional area reduction section 8 is greater than 180°, thereby ensuring that the wind speed in the annular housing can increase to a certain speed.

[0024] The angle α between adjacent blades 5 is 10°-18°. Preferably, the angle α between adjacent blades 5 is 12°. By setting the angles between adjacent blades, the airflow entering the air inlet window can be effectively improved to uniformly and effectively affect the particles, without causing the airflow velocity entering the air inlet window to be too low.

[0025] In this embodiment, the airflow flows clockwise in the annular housing 2, and the inner ends of the blades 5 are inclined clockwise relative to the outer ends, so that the airflow can effectively enter from the larger ends of the gaps between adjacent blades.

[0026] As another embodiment, when the airflow flows counterclockwise in the annular housing, the inner ends of the blades are inclined counterclockwise relative to the outer ends.

[0027] Along the diameter direction of the air inlet window 1 , the inner ends of the first blades 11 of the two adjacent blades 5 extend into the inner sides of the second blades 10 .

[0028] like Figure 1 and Figure 2 As shown, a classifier housing includes an outer shell 12 and an inner shell 13. A classifying wheel 14 is rotatably mounted on the upper end of the inner shell 13. The outer shell 12 is mounted with an air inlet mechanism. The outer shell 12 is provided with an annular groove, and the air inlet window 1 is fixedly mounted within the annular groove. The air inlet window evenly distributes wind force in the circumferential direction within the classification area of ​​the classifying wheel, thereby fully dispersing the powder particles. A sealing mechanism is provided between the classifying wheel and the inner shell. A feed port 15 is provided at the top of the outer shell 12. A bulking ring 16, which is positioned outside the classifying wheel, is provided between the feed port 15 and the air inlet window 1. Gaps are provided between the outer shell 12 and the classifying wheel 14, between the bulking ring 16 and the classifying wheel 14, between the air inlet window 1 and the classifying wheel 14, and between the outer shell 12 and the inner shell 13, and these gaps are interconnected. The lower end of the inner shell 13 is sealed and connected to an induced draft duct 17, which is connected to a negative pressure induced draft fan. The sealing mechanism may be a labyrinth sealing mechanism.

[0029] The above shows and describes the basic principles, main features, and advantages of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An air inlet mechanism, characterized in that: It includes an air inlet window and an annular shell, the air inlet window includes an upper ring body and a lower ring body, fan blades are provided between the upper ring body and the lower ring body, and the fan blade gaps between adjacent fan blades gradually decrease from the outside to the inside, the annular shell is sleeved outside the air inlet window, and the inner cavity of the annular shell and the fan blade gaps are connected to each other, an air inlet is provided on the annular shell, and an air inlet is installed on the air inlet. The air inlet is equipped with an air inlet pipe, and the axial direction of the air inlet pipe is parallel to the tangent direction of the upper ring body.

2. The air inlet mechanism according to claim 1, characterized in that: The inner cavity cross-sectional area of ​​the annular housing decreases in a clockwise or counterclockwise direction starting from the air inlet.

3. The air inlet mechanism according to claim 2, characterized in that: The inner cavity of the annular shell includes a cross-sectional area reduction section connected to the air inlet and a cross-sectional area consistency section connected to the tail of the cross-sectional area reduction section; in the cross-sectional area reduction section, the cross-sectional area of ​​the inner cavity of the annular shell decreases starting from the air inlet; in the cross-sectional area consistency section, the cross-sectional area of ​​each part of the annular shell remains consistent.

4. The air inlet mechanism according to claim 3, characterized in that: The central angle of the section with reduced cross-sectional area is greater than 180°.

5. The air inlet mechanism according to claim 1, wherein: The angle between adjacent sectors is 10°-18°.

6. The air inlet mechanism according to claim 5, characterized in that: The angle between adjacent sectors is 12°.

7. The air inlet mechanism according to claim 6, characterized in that: The airflow flows clockwise in the annular housing, and the inner ends of the blades are inclined in the clockwise direction relative to the outer ends.

8. The air inlet mechanism according to claim 6, characterized in that: The airflow flows counterclockwise in the annular housing, and the inner ends of the blades are inclined counterclockwise relative to the outer ends.

9. The air inlet mechanism according to claim 7, characterized in that: Along the diameter direction of the air inlet window, the inner end of the first fan blade of the two adjacent fan blades extends into the inner side of the second fan blade.

10. A classifier housing, characterized in that: The ventilator is provided with an air intake duct, and the ventilator is provided with an air intake duct, and the ventilator is provided with an air intake duct.

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