Airflow crushing sealing device and airflow crusher

Abstract

The utility model discloses a jet milling sealing device and a jet mill, and belongs to the technical field of jet mills. The sealing device comprises an air-tight sealing piece, a bearing and a center shaft, the air-tight sealing piece comprises a shell and an installation part, the shell is installed on the jet mill and matched with the grading wheel, the installation part is arranged in the shell, the bearing is installed on the installation part, the center shaft is connected with the end, close to the air-tight sealing piece, of the grading wheel, and the center shaft is installed on the bearing. The two ends of the grading wheel can be supported, the swing amplitude of the grading wheel during working is reduced, and the problem that in the prior art, the end, close to an air sealing piece, of the grading wheel is in a cantilever state, and the gap between the grading wheel and a discharging pipe is not uniform due to the large swing amplitude of the grading wheel during working is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of airflow pulverizers, specifically an airflow pulverizing sealing device and an airflow pulverizer. Background Technology

[0002] As per the instruction manual Figure 7 The existing airflow pulverizer shown includes a classifying wheel and an air seal. The air seal is fitted to the end face of the classifying wheel, and then the air seal applies air pressure to the end face of the classifying wheel to prevent the pulverized particles from entering between the air seal and the classifying wheel, thus achieving an air seal between the air seal and the classifying wheel. However, in this structure, the end of the classifying wheel near the air seal is in a cantilever state, which results in a large swing amplitude of the classifying wheel during operation, leading to uneven gaps between the classifying wheel and the discharge pipe. Summary of the Invention

[0003] Purpose of the invention: To provide an airflow pulverizing sealing device and an airflow pulverizer, which uses the cooperation of the mounting part of the air seal, the bearing and the central shaft to install the end of the classifying wheel close to the air seal, thereby solving the problem of uneven gap between the classifying wheel and the discharge pipe caused by the large swing amplitude during operation in the prior art.

[0004] The technical solution of the present invention is: an airflow pulverizing sealing device, which is installed on an airflow pulverizer, wherein the airflow pulverizer is provided with a classifying wheel.

[0005] Firstly, the airflow pulverizing sealing device includes: an air seal, a bearing, and a central shaft.

[0006] The gas-tight component includes: a housing and a mounting portion.

[0007] The housing is installed in the air jet mill and cooperates with the classifying wheel. The mounting part is disposed inside the housing, and the bearing is installed in the mounting part.

[0008] The central shaft is connected to the end of the grader wheel near the gas seal, and the central shaft is mounted on a bearing.

[0009] In a further embodiment of the first aspect, the gas seal further includes: a first connecting portion that connects the housing and the mounting portion.

[0010] In a further embodiment of the first aspect, the central axis extends in the direction of the grading wheel and connects the central axis to the end of the grading wheel away from the gas seal. Connecting the two ends of the grading wheel through the central axis can improve the centerness of the grading wheel during rotation and reduce the swing amplitude of the grading wheel.

[0011] In a further embodiment of the first aspect, the airflow pulverizing sealing device further includes: a fastener that extends from the mounting portion through the central axis in the direction of the classifying wheel and is connected to the rotational power source of the airflow pulverizer. The direct connection of the fastener to the rotational power source of the airflow pulverizer enables the power of the rotational power source to be transmitted from the center position of the classifying wheel to the end of the classifying wheel near the air seal, thereby further improving the centerness of the classifying wheel during rotation and reducing the swing amplitude of the classifying wheel.

[0012] In a further embodiment of the first aspect, the central shaft further includes: a second connecting portion that extends radially along the central shaft to the grading wheel and is connected to the grading wheel.

[0013] In a further embodiment of the first aspect, the sealing device further includes: an annular member connected to the blades of the grading wheel, wherein the second connecting portion extends to the annular member in the radial direction of the central axis and is connected to the annular member, thereby improving the connection strength between the central axis and the grading wheel and further reducing the oscillation amplitude of the grading wheel.

[0014] In a further embodiment of the first aspect, the airflow pulverizing sealing device further includes an end cap mounted on the end of the mounting portion away from the classifier wheel.

[0015] The mounting part is sleeved on the central shaft, and a sealing structure is provided between the mounting part and the central shaft on the side of the bearing near the classifier. The end cap can seal the side of the bearing away from the classifier, and the sealing structure between the mounting part and the central shaft can seal the side of the bearing near the classifier, thus achieving sealing on both sides of the bearing and preventing powder from entering the bearing.

[0016] In a further embodiment of the first aspect, the housing of the hermetically sealed element is fitted onto the grader wheel.

[0017] The housing is provided with an air passage. During operation, the air passage blows air radially toward the outer wall of the classifier wheel, which can apply air pressure to the classifier wheel from the radial direction, further reducing the swing amplitude of the classifier wheel near the air seal. Moreover, with the side wall of the classifier wheel as a buffer, the airflow cannot directly enter the inner cavity of the housing, which further improves the uniformity of airflow between the classifier wheel and the housing, thereby improving the uniformity of the air seal.

[0018] In a further embodiment of the first aspect, a first gap is provided between the portion of the housing fitted onto the grading wheel.

[0019] The end of the grading wheel near the shell is a first ramp structure with a decreasing outer diameter from the grading wheel towards the shell.

[0020] The end of the shell near the grading wheel has a second ramp structure with an inner diameter that decreases from the grading wheel toward the shell.

[0021] There is a second gap between the first slope structure and the second slope structure.

[0022] The air passage, the first gap, and the second gap are sequentially connected. The second gap is formed by the first and second ramp structures and is obliquely connected to the inner cavity of the shell along the airflow direction. This allows the airflow in the inner cavity of the shell to cooperate with the airflow in the air passage, reducing the probability of powder entering the first and second gaps between the shell and the classifier wheel, and further reducing the air consumption of the air passage.

[0023] Secondly, the air jet mill includes: the sealing device, classifying wheel, rotary power source, tank, feeding device, and air jet milling device described in the first aspect.

[0024] The sealing device, rotary power source, feeding device, and airflow pulverizing device are installed in the tank.

[0025] The grading wheel is mounted on a rotary power source, and the sealing device cooperates with the grading wheel to seal between the grading wheel and the tank body.

[0026] The feeding device and the airflow pulverizing device are located below the rotary power source.

[0027] The feeding device is used to convey materials into the tank, and the airflow pulverizing device is used to pulverize the materials conveyed by the feeding device.

[0028] The beneficial effects of this invention are as follows: This application uses the mounting part of the air seal, the bearing, and the central shaft to install the end of the classifying wheel near the air seal on the air seal. One end of the classifying wheel is installed in the air jet mill via a rotational power source, and the other end is installed in the air jet mill via the air seal. This allows both ends of the classifying wheel to be supported, reducing the swing amplitude of the classifying wheel during operation, improving the uniformity of the gap between the classifying wheel and the discharge pipe, making the air seal uniform, and thus improving the uniformity of the material fineness. This solves the problem in the prior art where the end of the classifying wheel near the air seal is in a cantilever state, resulting in a large swing amplitude of the classifying wheel during operation. Attached Figure Description

[0029] Figure 1 This is a front cross-sectional view of the sealing device of the present invention in conjunction with the grader wheel.

[0030] Figure 2 This is the present invention. Figure 1 A magnified view of part A.

[0031] Figure 3 This is a side sectional view of the grading wheel and the central shaft of the present invention.

[0032] Figure 4 This is an isometric schematic diagram of the gas-tight component of the present invention.

[0033] Figure 5 This is a side view of the gas-tight component of the present invention.

[0034] Figure 6 This is a front cross-sectional view of the airflow pulverizer of the present invention.

[0035] Figure 7 This is a cross-sectional schematic diagram of the existing airflow pulverizing sealing device and the classifier wheel.

[0036] The reference numerals in the figure are as follows: grading wheel 100, sealing device 200, airtight component 201, housing 2011, mounting part 2012, first connecting part 2013, air passage 2014, bearing 202, central shaft 203, second connecting part 2031, fastener 204, end cover 205, ring part 206, rotary power source 300, tank 400, feeding device 500, and airflow pulverizing device 600. Detailed Implementation

[0037] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0038] This application discloses an airflow pulverizing sealing device and an airflow pulverizer. The sealing device uses the cooperation of the mounting part of the air seal, the bearing and the central shaft to install the end of the classifying wheel close to the air seal, which solves the problem of the large swing amplitude of the classifying wheel during operation in the prior art.

[0039] Firstly, such as Figure 1 The sealing device 200 shown is installed on an air jet mill, which is equipped with a classifying wheel 100.

[0040] The airflow pulverizing sealing device 200 includes: an air seal 201, a bearing 202, and a central shaft 203.

[0041] The gas seal 201 includes a housing 2011 and a mounting portion 2012.

[0042] The housing 2011 is installed on the air jet mill and cooperates with the classifying wheel 100. The mounting part 2012 is disposed inside the housing 2011, and the bearing 202 is installed in the mounting part 2012.

[0043] The central shaft 203 is connected to the end of the grader wheel 100 near the gas seal 201, and the central shaft 203 is mounted on the bearing 202.

[0044] Regarding the gas seal 201, such as Figure 1 , 4 The gas seal 201 shown in Figure 5 further includes a first connecting portion 2013, which connects the housing 2011 and the mounting portion 2012. In a preferred embodiment, the dimensions of the first connecting portion 2013 decreasing towards the grader wheel 100, and the first connecting portion 2013 can be a plurality of square steel, angle steel, or plate structures arranged around the circumference of the mounting portion 2012, such as... Figure 4 and 5 The first connecting part 2013 shown is composed of three square steels evenly distributed around the circumference of the mounting part 2012, with the edges of the square steels facing the classifier wheel 100. The part of the first connecting part 2013 facing the classifier wheel 100 is a combination of a slope with decreasing dimensions and a rounded corner structure. Alternatively, the first connecting part 2013 can be an angle steel with its edges facing the classifier wheel 100. By setting the dimensions in a decreasing manner, the resistance of the connecting part to the outflowing airflow can be reduced.

[0045] like Figure 1 The sealing device 200 shown further includes a fastener 204, which extends from the mounting portion 2012 through the central shaft 203 toward the classifier wheel 100 and is connected to the rotational power source 300 of the air jet mill. This fastener 204 can be... Figure 1 The screw shown, which passes through the mounting part 2012 and connects to the central shaft 203 and the rotary power source 300, can also be a combination of a screw and a nut, where the screw passes through the mounting part 2012 and connects to the central shaft 203 and the rotary power source 300, and the nut is connected to the end of the screw near the mounting part 2012.

[0046] The sealing device 200 also includes an end cap 205, which is installed on the end of the mounting portion 2012 away from the grading wheel 100.

[0047] The mounting part 2012 is sleeved on the central shaft 203, and a sealing structure is provided between the mounting part 2012 and the central shaft 203 on the side of the bearing 202 near the grader wheel 100. The sealing structure can be a sealing ring structure.

[0048] Regarding the central shaft 203, the central shaft 203 may be independent of the central shaft 203 of the grading wheel 100 or the rotation shaft of the rotation power source 300, or it may be an extension of the central shaft 203 of the grading wheel 100.

[0049] like Figure 1 The central shaft 203 extends toward the grader wheel 100 and is connected to the end of the grader wheel 100 away from the gas seal 201.

[0050] The central shaft 203 also includes a second connecting portion 2031, which extends radially along the central shaft 203 to the grading wheel 100 and is connected to the grading wheel 100.

[0051] The second connecting part 2031 is a circumferentially arranged square steel, angle steel, or plate structure distributed around the central axis 203, such as... Figure 3 The second connecting part 2031 shown is a rod-shaped structure that is evenly distributed around the circumference of the central axis 203.

[0052] The sealing device 200 further includes: an annular member 206 connected to the blades of the grader wheel 100; and a second connecting portion 2031 extending radially along the central shaft 203 to and connected to the annular member 206, such as... Figure 3 The annular component 206 shown is a circular structure that is connected to the blades of the grader wheel 100.

[0053] At least two sets of second connecting portions 2031 and annular members 206 extend along the axial direction of the central axis 203, such as Figure 1 The diagram shows four groups of equally distributed second connecting parts 2031 and ring parts 206.

[0054] Regarding the fit between the housing 2011 and the stage wheel 100, the housing 2011 is provided with an air passage 2014, which allows for the following: Figure 7 Air is blown toward the end of the grading wheel 100 along the axial direction, as shown.

[0055] It can also be like Figure 1 and 2 The grader wheel 100 shown extends a tube towards the gas seal 201. The housing 2011 of the gas seal 201 is fitted onto the tube. The air passage 2014 blows air toward the outer wall of the tube in the radial direction. The first ramp structure is provided on the tube. The first gap is the gap between the housing 2011 and the tube.

[0056] The housing 2011 of the gas seal 201 is fitted onto the grader wheel 100.

[0057] The housing 2011 is provided with an air passage 2014. During operation, the air passage 2014 blows air toward the outer wall of the classifier wheel 100 in the radial direction. In a preferred embodiment, the end of the air passage 2014 near the classifier wheel 100 is an annular structure arranged around the inner wall of the housing 2011.

[0058] like Figure 2 There is a first gap between the portion of the housing 2011 that is fitted onto the grader wheel 100.

[0059] The end of the grading wheel 100 near the housing 2011 is a first ramp structure with the outer diameter decreasing from the grading wheel 100 toward the housing 2011.

[0060] The end of the housing 2011 near the grader wheel 100 has a second ramp structure with an inner diameter that decreases from the grader wheel 100 toward the housing 2011.

[0061] There is a second gap between the first and second slope structures.

[0062] The airway 2014, the first gap, and the second gap are connected in sequence.

[0063] Secondly, such as Figure 6 The air jet mill shown includes: the sealing device 200 described in the first aspect, the classifying wheel 100, the rotary power source 300, the tank 400, the feeding device 500, and the air jet milling device 600, wherein the classifying wheel 100 includes end plates at both ends and blades between the end plates, the blades being as follows: Figure 3 As shown in the diagram, the rotary power source 300 is a power device such as an electric motor used to drive the grading wheel 100 to rotate.

[0064] The sealing device 200, the rotary power source 300, the feeding device 500 and the airflow pulverizing device 600 are installed in the tank body 400, and the sealing device 200 is installed in the discharge pipe of the tank body 400.

[0065] The grading wheel 100 is installed on the rotary power source 300, and the sealing device 200 cooperates with the grading wheel 100. The sealing device 200 is used to seal between the grading wheel 100 and the tank body 400.

[0066] The feeding device 500 and the air jet pulverizer 600 are located below the rotary power source 300.

[0067] The feeding device 500 is used to convey materials into the tank 400, and the airflow pulverizer 600 is used to pulverize the materials conveyed by the feeding device 500.

[0068] Working method: The feeding device 500 conveys material into the tank 400. The airflow pulverizer 600 pulverizes the material conveyed by the feeding device 500. After pulverization, the material powder with a fineness reaching the threshold rises into the classifying wheel 100 in the tank 400. After passing through the classifying wheel 100 and the shell 2011 of the airtight component 201, the material powder with a fineness reaching the threshold is output to the outside of the tank 400.

[0069] When the powdered material passes through the housing 2011 of the classifying wheel 100 and the air seal 201, the cooperation of the mounting part 2012 of the air seal 201, the bearing 202, the central shaft 203 and the rotating power source 300 enables both ends of the classifying wheel 100 to be supported, reducing the swing amplitude of the classifying wheel 100 during operation, thereby reducing the gap between the air seal 201 and the classifying wheel 100, reducing the air consumption, and thus improving the uniformity of the fineness of the output material.

[0070] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An airflow pulverizing sealing device, installed on an airflow pulverizer, wherein the airflow pulverizer is provided with a classifying wheel; Its features are, The airflow pulverizing sealing device includes: an air seal, a bearing, and a central shaft; The airtight component includes: a housing and a mounting portion; The housing is installed in the airflow pulverizer and cooperates with the classifying wheel; the mounting part is disposed inside the housing; and the bearing is installed in the mounting part. The central shaft is connected to the end of the grader wheel near the gas seal, and the central shaft is mounted on a bearing.

2. The airflow pulverizing and sealing device according to claim 1, characterized in that, The gas-tight component further includes: a first connecting part, which connects the housing and the mounting part.

3. The airflow pulverizing and sealing device according to claim 1, characterized in that, The central axis extends in the direction of the grading wheel, and the central axis is connected to the end of the grading wheel away from the gas seal.

4. The airflow pulverizing and sealing device according to claim 1, characterized in that, Also includes: Fasteners extend from the mounting section through the central axis towards the grading wheel and are connected to the rotational power source of the air jet mill.

5. The airflow pulverizing and sealing device according to claim 1, characterized in that, The central shaft further includes a second connecting portion that extends radially along the central shaft to the grading wheel and is connected to the grading wheel.

6. The airflow pulverizing and sealing device according to claim 5, characterized in that, Also includes: An annular component is connected to the blades of the grading wheel, and the second connecting portion extends radially along the central axis to the annular component and is connected to the annular component.

7. The airflow pulverizing and sealing device according to claim 1, characterized in that, Also includes: End caps are installed at the end of the mounting section away from the grading wheel; The mounting part is sleeved on the central shaft, and a sealing structure is provided between the mounting part and the central shaft on the side of the bearing near the grader wheel.

8. The airflow pulverizing and sealing device according to claim 1, characterized in that, The housing of the gas-tight component is fitted onto the grader wheel; The housing is provided with an air passage, which blows air radially toward the outer wall of the grading wheel during operation.

9. The airflow pulverizing and sealing device according to claim 8, characterized in that, There is a first gap between the portion of the housing that is fitted onto the grading wheel; The end of the grading wheel near the shell is a first ramp structure with a decreasing outer diameter from the grading wheel towards the shell. The end of the housing near the grading wheel is a second ramp structure with an inner diameter that decreases from the grading wheel toward the housing. A second gap exists between the first slope structure and the second slope structure; The airway, the first gap, and the second gap are sequentially connected.

10. An airflow pulverizer, characterized in that, include: The sealing device, classifying wheel, rotary power source, tank, feeding device, and airflow pulverizing device as described in any one of claims 1-9; The sealing device, rotary power source, feeding device, and airflow pulverizing device are installed in the tank body; The grading wheel is mounted on a rotary power source, and the sealing device cooperates with the grading wheel. The sealing device is used to seal between the grading wheel and the tank body. The feeding device and the airflow pulverizing device are located below the rotary power source; The feeding device is used to convey materials into the tank, and the airflow pulverizing device is used to pulverize the materials conveyed by the feeding device.

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