Airflow crushing sealing device and airflow crusher

Abstract

The invention 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] The invention belongs to the technical field of air flow pulverizers, in particular to an air flow pulverizing sealing device and an air flow pulverizer. Background Art

[0002] As the instruction manual Figure 7 The prior art air flow mill shown includes: a classifying wheel and an air seal, the air seal is matched with 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 crushed particles from entering between the air seal and the classifying wheel to achieve air sealing between the air seal and the classifying wheel. However, in this structure, one end of the classifying wheel close to the air seal is in a cantilever state, and there is a problem that the classifying wheel swings a large amplitude during operation, resulting in an uneven gap between the classifying wheel and the discharge pipe. Summary of the invention

[0003] Purpose of the invention: To provide an air flow pulverizing sealing device and an air flow pulverizer, which installs the end of the classifying wheel close to the air flow seal on the air flow seal by cooperating with the mounting part of the air flow seal, the bearing and the central axis, 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, and the airflow pulverizer is provided with a classifying wheel.

[0005] In a first aspect, an air flow pulverizing sealing device includes: an air seal, a bearing and a central shaft.

[0006] The airtight seal comprises a housing and a mounting portion.

[0007] The shell is installed on the air flow pulverizer and matched with the classifying wheel, the mounting portion is arranged in the shell, and the bearing is installed on the mounting portion.

[0008] The central shaft is connected to one end of the classifying wheel close to the gas seal, and the central shaft is installed on the bearing.

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

[0010] In a further embodiment of the first aspect, the central axis extends toward the classifying wheel, and is connected to one end of the classifying wheel away from the air seal. Connecting the two ends of the classifying wheel through the central axis can improve the centrality of the classifying wheel during rotation and reduce the swing amplitude of the classifying wheel.

[0011] In a further embodiment of the first aspect, the air flow pulverizing sealing device also includes: a fastener, which extends from the mounting portion through the central axis toward the classifying wheel and is connected to the rotating power source of the air flow pulverizer. The fastener is directly connected to the rotating power source of the air flow pulverizer, so that the power of the rotating power source can be transmitted from the center position of the classifying wheel to one end of the classifying wheel close to the air seal, thereby further improving the centrality 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, which extends along the radial direction of the central shaft to the classifying wheel and is connected to the classifying wheel.

[0013] In a further embodiment of the first aspect, the sealing device also includes: an annular member, which is connected to the blades of the classifying wheel, and the second connecting portion extends to the annular member along the radial direction of the central axis and is connected to the annular member, which can improve the connection strength between the central axis and the classifying wheel and further reduce the swing amplitude of the classifying wheel.

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

[0015] The mounting portion is sleeved on the central axis and is located on a side of the bearing close to the classifying wheel, so that a sealing structure is provided between the mounting portion and the central axis. The side of the bearing away from the classifying wheel can be sealed through the end cover, and the side of the bearing close to the classifying wheel can be sealed through the sealing structure between the mounting portion and the central axis, thereby sealing both sides of the bearing to prevent powder from entering the bearing.

[0016] In a further embodiment of the first aspect, the housing of the air seal is sleeved on the classifying wheel.

[0017] The shell is provided with an air channel. When working, the air channel blows air toward the outer wall of the classifying wheel in the radial direction, and can apply air pressure to the classifying wheel from the radial direction, further reducing the swing amplitude of the classifying wheel close to the air seal. In addition, the side wall of the classifying wheel is used as a buffer so that the airflow cannot directly enter the inner cavity of the shell, further improving the uniformity of the airflow between the classifying wheel and the shell, thereby improving the uniformity of the air seal.

[0018] In a further embodiment of the first aspect, a first gap is provided between the parts where the shell is sleeved on the classifying wheel.

[0019] The end of the classifying wheel close to the shell is a first slope structure with an outer diameter decreasing from the classifying wheel toward the shell.

[0020] The end of the shell close to the classifying wheel is a second slope structure with an inner diameter decreasing from the classifying wheel to the shell.

[0021] A second gap is provided between the first slope structure and the second slope structure.

[0022] The airway, the first gap and the second gap are connected in sequence, and the second gap is formed by the first slope structure and the second slope structure to be obliquely connected with the inner cavity of the shell along the airflow direction in the inner cavity of the shell, so that the airflow in the inner cavity of the shell can be coordinated with the airflow in the airway, thereby reducing the probability of powder entering the first gap and the second gap between the shell and the classifying wheel, and further reducing the air consumption of the airway.

[0023] In a second aspect, the air flow pulverizer comprises: the sealing device described in the first aspect, a classifying wheel, a rotating power source, a tank body, a feeding device and an air flow pulverizing device.

[0024] The sealing device, the rotating power source, the feeding device and the air flow crushing device are installed on the tank body.

[0025] The classifying wheel is installed on a rotating power source, the sealing device cooperates with the classifying wheel, and the sealing device is used for sealing between the classifying wheel and the tank body.

[0026] The feeding device and the air flow crushing device are arranged below the rotary power source.

[0027] The feeding device is used to convey materials into the tank body, and the air flow crushing device is used to crush the materials conveyed by the feeding device.

[0028] The beneficial effects of the present invention are as follows: the present application installs one end of the classifying wheel close to the air seal on the air seal through the cooperation of the mounting part of the air seal, the bearing and the central axis, so that one end of the classifying wheel is installed on the air flow pulverizer through a rotating power source, and the other end is installed on the air flow pulverizer through the air seal, so that both ends of the classifying wheel can be supported, the swing amplitude of the classifying wheel during operation is reduced, the uniformity of the gap between the classifying wheel and the discharge pipe is improved, the air seal is uniform, and then the uniformity of the material fineness is improved, which solves the problem that the end of the classifying wheel close to the air seal in the prior art is in a cantilever state and the swing amplitude of the classifying wheel is large during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front cross-sectional schematic diagram of the cooperation between the sealing device of the present invention and the classifying wheel.

[0030] Figure 2 The present invention Figure 1 A local enlarged schematic diagram of point A.

[0031] Figure 3 It is a side cross-sectional schematic diagram of the matching of the grading wheel and the central shaft of the present invention.

[0032] Figure 4 Schematic diagram of the axonometric view of the gas seal of the present invention.

[0033] Figure 5 Schematic side view of the airtight seal of the present invention.

[0034] Figure 6 It is a front cross-sectional schematic diagram of the air flow pulverizer of the present invention.

[0035] Figure 7 The utility model is a cross-sectional schematic diagram of the cooperation between the air flow crushing sealing device and the classifying wheel in the prior art.

[0036] The reference numerals shown in the figure are: a classifying wheel 100, a sealing device 200, an air seal 201, a shell 2011, a mounting portion 2012, a first connecting portion 2013, an air duct 2014, a bearing 202, a central axis 203, a second connecting portion 2031, a fastener 204, an end cover 205, an annular member 206, a rotating power source 300, a tank body 400, a feeding device 500, and an air flow pulverizing device 600. DETAILED DESCRIPTION

[0037] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0038] The present application discloses an air flow pulverizing sealing device and an air flow pulverizer. The sealing device installs one end of a classifying wheel close to the air flow sealing member on the air flow sealing member through the cooperation of the mounting portion of the air flow sealing member, a bearing and a central axis, thereby solving the problem of a large swing amplitude of the classifying wheel in the prior art during operation.

[0039] First, as Figure 1 The sealing device 200 is installed in a jet mill, and the jet mill is provided with a classifying wheel 100 .

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

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

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

[0043] The central shaft 203 is connected to one end of the classifying wheel 100 close to the gas seal 201 , and the central shaft 203 is installed on the bearing 202 .

[0044] Regarding the air seal 201, Figure 1 , 4 The air seal 201 shown in FIG. 5 further includes: a first connecting portion 2013, which connects the housing 2011 and the mounting portion 2012. In a preferred embodiment, the first connecting portion 2013 is arranged with a decreasing size toward the position of the grading wheel 100. The first connecting portion 2013 can be a plurality of square steels, angle steels or plate-like structures arranged around the circumference of the mounting portion 2012, such as Figure 4 and 5 The first connecting portion 2013 shown is three square steels equally divided around the circumference of the mounting portion 2012, with the edges of the square steels facing the classifying wheel 100, so that the portion of the first connecting portion 2013 facing the classifying wheel 100 is a combination of a slope with decreasing size and a rounded corner structure, or the first connecting portion 2013 can be an angle steel with its edges facing the classifying wheel 100, and the resistance of the connecting portion to the outflowing airflow can be reduced by the decreasing size setting.

[0045] like Figure 1 The sealing device 200 further includes a fastener 204, which extends from the mounting portion 2012 through the central axis 203 toward the classifying wheel 100 and is connected to the rotating power source 300 of the air flow mill. The fastener 204 may be Figure 1 The screw shown extending from the mounting portion 2012 through the central axis 203 and connected to the rotating power source 300 may also be a combination of a screw and a nut, so that the screw extends from the mounting portion 2012 through the central axis 203 and connected to the rotating power source 300, and the nut is connected to one end of the screw near the mounting portion 2012.

[0046] The sealing device 200 further includes an end cover 205 , which is mounted on an end of the mounting portion 2012 away from the classifying wheel 100 .

[0047] The mounting portion 2012 is sleeved on the central shaft 203 and is located on a side of the bearing 202 close to the classifying wheel 100 , so that a sealing structure is provided between the mounting portion 2012 and the central shaft 203 , wherein the sealing structure may be a sealing ring structure.

[0048] Regarding the central axis 203 , the central axis 203 may be independent of the central axis 203 of the classifying wheel 100 or the central axis 203 of the rotating shaft of the rotary power source 300 , or may be an extension of the central axis 203 of the classifying wheel 100 .

[0049] like Figure 1 The central axis 203 is shown to extend toward the classifying wheel 100 , and the central axis 203 is connected to an end of the classifying wheel 100 away from the gas sealing member 201 .

[0050] The central shaft 203 further includes: a second connecting portion 2031 , which extends along the radial direction of the central shaft 203 to the classifying wheel 100 and is connected to the classifying wheel 100 .

[0051] The second connection part 2031 is a circumferentially arranged square steel, angle steel or plate-shaped structure distributed around the central axis 203, such as Figure 3 The second connecting portion 2031 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 classifying wheel 100, and a second connecting portion 2031 extending to the annular member 206 along the radial direction of the central axis 203 and connected to the annular member 206, such as Figure 3 The ring member 206 is a circular ring-shaped structure, which is connected to the blades of the classifying wheel 100 .

[0053] At least two groups of second connecting parts 2031 and annular members 206 are arranged to extend along the axial direction of the central axis 203. Figure 1 As shown, four groups of second connecting parts 2031 and annular members 206 are arranged in equal distribution.

[0054] Regarding the cooperation between the housing 2011 and the classifying wheel 100, the housing 2011 is provided with an air passage 2014, which can be as follows: Figure 7 It is shown that air is blown in the axial direction toward the end of the classifying wheel 100 .

[0055] You can also Figure 1 and 2 The grading wheel 100 shown has a tube portion extending toward the gas seal 201, a shell 2011 of the gas seal 201 is sleeved on the tube portion, an air passage 2014 blows air toward the outer wall of the tube portion in a radial direction, a first slope structure is arranged on the tube portion, and a first gap is a gap between the shell 2011 and the tube portion.

[0056] The housing 2011 of the air seal 201 is sleeved on the classifying wheel 100 .

[0057] The shell 2011 is provided with an air passage 2014 , and during operation, the air passage 2014 blows air radially toward the outer wall of the classifying wheel 100 . In a preferred embodiment, one end of the air passage 2014 close to the classifying wheel 100 is an annular structure arranged around the inner wall of the shell 2011 .

[0058] like Figure 2 As shown, the housing 2011 is sleeved on the classification wheel 100 with a first gap therebetween.

[0059] The end of the classifying wheel 100 close to the housing 2011 is a first slope structure whose outer diameter decreases gradually from the classifying wheel 100 toward the housing 2011 .

[0060] The end of the housing 2011 close to the classifying wheel 100 is a second slope structure whose inner diameter decreases gradually from the classifying wheel 100 toward the housing 2011 .

[0061] A second gap is provided between the first slope structure and the second slope structure.

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

[0063] Second, as Figure 6 The air flow mill shown in the figure comprises: the sealing device 200 described in the first aspect, a classifying wheel 100, a rotating power source 300, a tank body 400, a feeding device 500 and an air flow milling device 600, wherein the classifying wheel 100 comprises end plates at both ends and blades between the end plates, and the blades are as follows Figure 3 As shown in the distribution, the rotating power source 300 is a power device such as a motor for driving the classifying wheel 100 to rotate.

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

[0065] The classifying wheel 100 is installed on the rotating power source 300 , and the sealing device 200 cooperates with the classifying wheel 100 . The sealing device 200 is used for sealing between the classifying wheel 100 and the tank body 400 .

[0066] The feeding device 500 and the air flow pulverizing device 600 are disposed below the rotary power source 300 .

[0067] The feeding device 500 is used to convey materials into the tank body 400 , and the air flow crushing device 600 is used to crush the materials conveyed by the feeding device 500 .

[0068] Working method: the feeding device 500 conveys materials into the tank body 400, and the air flow crushing device 600 crushes the materials conveyed by the feeding device 500. After crushing, the material powder with a fineness reaching a threshold value rises to the classifying wheel 100 in the tank body 400, and the material powder with a fineness reaching a threshold value passes through the classifying wheel 100 and the shell 2011 of the air seal 201 and is output to the outside of the tank body 400.

[0069] When the material powder passes through the classifying wheel 100 and the housing 2011 of the air seal 201, the mounting portion 2012 of the air seal 201, the bearing 202, the central axis 203 and the rotary power source 300 cooperate to support both ends of the classifying wheel 100, thereby 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 gas consumption, and thereby improving the uniformity of the output material fineness.

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

Claims

1. An airflow pulverizing sealing device, which is installed in an airflow pulverizer, wherein the airflow pulverizer is provided with a classifying wheel; It is characterized in that The air flow crushing sealing device comprises: an air seal, a bearing and a central shaft; The air seal comprises: a housing and a mounting portion; The housing is installed on the airflow mill and matched with the classifying wheel, the mounting portion is arranged in the housing, and the bearing is installed on the mounting portion; The central shaft is connected to one end of the classifying wheel close to the gas seal, and the central shaft is installed on the bearing.

2. The air flow crushing and sealing device according to claim 1, characterized in that: The airtight seal also includes a first connecting portion connecting the housing and the mounting portion.

3. The air flow crushing and sealing device according to claim 1, characterized in that: The central axis extends toward the classifying wheel, and is connected to an end of the classifying wheel away from the gas sealing member.

4. The air flow crushing and sealing device according to claim 1, characterized in that: Also includes: The fastener extends from the mounting portion through the central axis toward the classifying wheel and is connected to the rotating power source of the air flow pulverizer.

5. The air flow crushing and sealing device according to claim 1, characterized in that: The central shaft further includes: a second connecting portion, which extends to the classifying wheel along the radial direction of the central shaft and is connected to the classifying wheel.

6. The air flow crushing and sealing device according to claim 5, characterized in that: Also includes: The annular member is connected to the blades of the classifying wheel, and the second connecting portion extends to the annular member along the radial direction of the central axis and is connected to the annular member.

7. The air flow crushing and sealing device according to claim 1, characterized in that: Also includes: An end cover, which is mounted on an end of the mounting portion away from the grading wheel; The mounting part is sleeved on the central shaft and is located on a side of the bearing close to the grading wheel, so that a sealing structure is provided between the mounting part and the central shaft.

8. The air flow crushing and sealing device according to claim 1, characterized in that: The housing of the air seal is sleeved on the classifying wheel; The shell is provided with an air passage, and during operation, the air passage blows air in a radial direction toward the outer wall of the classifying wheel.

9. The air flow crushing and sealing device according to claim 8, characterized in that: The housing is sleeved on the grading wheel with a first gap therebetween; The end of the classifying wheel close to the shell is a first slope structure with an outer diameter decreasing from the classifying wheel toward the shell; The end of the shell close to the classifying wheel is a second slope structure with an inner diameter decreasing from the classifying wheel toward the shell; A second gap is provided between the first slope structure and the second slope structure; The airway, the first gap and the second gap are connected in sequence.

10. The air flow mill is characterized in that: include: The sealing device, the classifying wheel, the rotating power source, the tank body, the feeding device and the air flow pulverizing device according to any one of claims 1 to 9; The sealing device, the rotary power source, the feeding device and the air flow pulverizing device are installed on the tank body; The classifying wheel is installed on the rotating power source, the sealing device cooperates with the classifying wheel, and the sealing device is used for sealing between the classifying wheel and the tank body; The feeding device and the air flow crushing device are arranged below the rotary power source; The feeding device is used to convey materials into the tank body, and the air flow crushing device is used to crush the materials conveyed by the feeding device.

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