Air curtain ring groove sealing device for airflow separation

Abstract

The utility model provides an air curtain ring groove sealing device for airflow separation, and aims to solve the technical problem that the grading precision is influenced by a gap between an existing grading wheel and a discharge pipe. The device is arranged in an upper cabin body of airflow separation equipment and comprises a grading wheel and an air curtain ring groove sealing device which are oppositely arranged, the end face, facing the air curtain ring groove sealing device, of the grading wheel is a movable sealing end face, the end face, facing the grading wheel, of the air curtain ring groove sealing device is an air outlet end face, the movable sealing end face and the air outlet end face are in clearance fit through ring grooves formed in the movable sealing end face and the air outlet end face to form sealing, and air curtain chamber air outlet flow guide holes are formed in the circumferential direction of the air outlet end face. And the air curtain chamber air outlet flow guide hole is communicated with the air curtain air supply chamber, and compressed air in the air curtain air supply chamber passes through the air curtain chamber air outlet flow guide hole and generates air pressure to form an air curtain with air flow penetrating through a gap between the grading wheel annular groove and the air curtain chamber annular groove. According to the device disclosed by the utility model, air curtain sealing is formed in a gap between the grading wheel and the discharge pipe, and the grading precision is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grading wheel sealing for airflow sorting, in particular to an air curtain ring groove sealing device for airflow sorting. Background Art

[0002] The classifying wheel of airflow sorting is composed of front and rear impeller discs at both ends and a circle of blades fixedly connected between the impeller discs. There is a feed gap between adjacent blades, a cavity is formed on the inner side of a circle of blades, and the rear impeller disc is closed. There is a discharge port in the middle of the front impeller disc. Under the drag of the fan at the tail end of the sorting equipment, the mixed powders of various particle sizes enter from the feed port at the lower end of the sorting equipment and move with the rising airflow to the classifying wheel. The high-speed rotating classifying wheel forms an inherent airflow flow field due to its special blade gap and blade shape. At this time, the classifying wheel is equivalent to a sieve to screen and classify the mixed powder into coarse and fine particles. The coarse particles are intercepted and collided by the blades, and move away from the classifying wheel under the action of centrifugal force, and finally collide with the surrounding cavity wall, fall under the action of gravity and are collected. Fine particles are likely to pass through the feed gap between the blades of the classifying wheel, and enter the next classification or enter the cyclone collection box through the discharge pipe fixedly installed on the classifying wheel and the equipment to be collected. The separation of coarse and fine particles and the precise control of the particle size of fine particles can be achieved by simply controlling the rotation speed of the classifying wheel. However, since the classifying wheel is fixed on the upper cabin of the sorting equipment and the rear impeller is fixed on the rotating shaft of the motor and drives the classifying wheel to rotate with the rotating shaft, while the discharge pipe is fixed on the upper cabin and is stationary, that is to say, the classifying wheel is a rotating component and the discharge pipe is a stationary component. In order to ensure the normal rotation of the classifying wheel, there must be a gap between the two. Regardless of the size of this gap, there will always be a part of the material that has not been classified by the classifying wheel blades and flows directly through the gap between the moving and stationary components, resulting in the coarse particles entering the fine particles and no complete particle classification.

[0003] Therefore, it is of great significance to study a device with good sealing performance and ensuring the grading accuracy of the grading wheel. Utility Model Content

[0004] The utility model aims to solve the technical problem that the gap between the existing grading wheel and the discharge pipe affects the grading accuracy. By arranging a dynamic sealing end face and a grading wheel ring groove at the position where the grading wheel discharge port is located, an air curtain air supply chamber is sleeved on the outer periphery of the discharge pipe, an air outlet end face and an air curtain chamber ring groove opposite to the grading wheel dynamic sealing end face are arranged on the air curtain air supply chamber, and after the gap between the grading wheel ring groove and the air curtain chamber ring groove is matched, an air curtain chamber outlet guide hole is arranged on the air outlet end face, and an external air source introduced into the air curtain air supply chamber passes through the air curtain chamber outlet guide hole, an air curtain is formed in the gap between the rotating part (i.e., the classifier) ​​and the stationary part (i.e., the air curtain ring groove sealing device), thereby achieving the sealing of the two.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An air curtain ring groove sealing device for air flow sorting, fixedly arranged in an upper cabin of an air flow sorting device, comprises a classifying wheel and an air curtain ring groove sealing device arranged oppositely;

[0007] The end surface of the classifying wheel facing the air curtain annular groove sealing device is, and the dynamic sealing end surface includes an annular groove boss and a classifying wheel annular groove arranged on the annular groove boss;

[0008] The end surface of the air curtain annular groove sealing device facing the classifying wheel is an air outlet end surface, and the air outlet end surface includes an inwardly concave air curtain chamber wedge opening and an air curtain chamber annular groove arranged on the air curtain chamber wedge opening;

[0009] Among them, the convex surface of the grading wheel ring groove is located in the concave surface of the air curtain chamber ring groove, and the two are in a clearance fit; the air curtain ring groove sealing device includes a discharge pipe and an air curtain air supply chamber sleeved on the outer periphery of the discharge pipe, the air outlet end face is arranged on the air curtain air supply chamber, and the air outlet end face is also provided with an air curtain chamber air outlet guide hole, the air curtain chamber air outlet guide hole is located at the outer end of the air curtain chamber wedge mouth and is connected with the air curtain air supply chamber, which is used for the compressed air in the air curtain air supply chamber to pass through and generate air pressure to form an air curtain with the airflow passing through the gap between the grading wheel ring groove and the air curtain chamber ring groove.

[0010] As the preferred technical solution:

[0011] In the air curtain ring groove sealing device for airflow sorting as described above, the clearance size of the clearance fit is 0.1-1.5 mm.

[0012] As described above, an air curtain ring groove sealing device for airflow sorting, the classifying wheel includes a front impeller disc, a rear impeller disc, blades installed between the front impeller disc and the rear impeller disc, and a discharge hole formed by the blades, the rear impeller disc is connected to the rotating shaft of the motor, and the dynamic sealing end face is arranged on the front impeller disc.

[0013] As described above, in an air curtain ring groove sealing device for air flow sorting, the grading wheel ring groove is a plurality of concentric ring grooves distributed along the radial direction of the discharge hole, and the side faces of the ring grooves have an inward inclination angle; the air curtain chamber ring groove is a plurality of concentric ring grooves distributed along the radial direction of the discharge hole, and the side faces of the ring grooves have an outward inclination angle.

[0014] In the air curtain ring groove sealing device for air flow sorting as described above, the air curtain chamber air outlet guide hole is arranged obliquely to the air outlet end surface.

[0015] In the air curtain ring groove sealing device for air flow sorting as described above, the air curtain chamber has a plurality of air outlet guide holes arranged in a circumferential array along the air outlet end surface.

[0016] In the air curtain ring groove sealing device for air flow sorting as described above, the air curtain chamber air outlet guide hole is inclined at an angle of 5 to 30 degrees with the busbar.

[0017] An air curtain ring groove sealing device for air flow sorting as described above, wherein the tail end of the discharge pipe of the air curtain ring groove sealing device is provided with a connecting flange, which is connected to the next-stage air flow sorting equipment or to the cyclone collection box;

[0018] The outer wall of the air curtain air supply chamber of the air curtain ring groove sealing device is provided with a connecting ear, which is fixedly connected to the upper cabin body.

[0019] In the air curtain ring groove sealing device for air flow sorting as described above, an air curtain chamber air inlet is also provided on the outer wall of the air curtain air supply chamber, and the air flow enters the air curtain air supply chamber from the air curtain chamber air inlet and then flows out from the air curtain chamber air outlet guide hole.

[0020] Utility model mechanism:

[0021] In the prior art, due to the gap between the rotating classifying wheel and the stationary discharge pipe, a part of the material will not be classified by the classifying wheel blades, resulting in the coarse particles entering the fine particles and incomplete particle classification. The air curtain ring groove sealing device for airflow sorting of the utility model is a special device arranged between the classifying wheel and the discharge pipe, which can prevent the passage of unclassified materials.

[0022] The principle is: by introducing an external air source, an air curtain is formed in the gap between the end faces of the rotating component (sorter) and the stationary component (air curtain ring groove sealing device). This air curtain has a certain pressure, which is greater than the gravitational force of the fan, forming a pressure difference on this surface, blocking the rising airflow through this gap. At the same time, the part of the rotating component extending into the stationary component forms a thread pair with a special angle, and an air vortex is generated during the high-speed rotation of the rotating component. This air vortex forms a whole with the aforementioned air curtain, from one surface of the air curtain to a three-dimensional space of the vortex, effectively preventing the rising airflow carrying materials from passing through.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. The air curtain ring groove sealing device for air flow sorting of the utility model effectively prevents the air flow with mixed materials from directly passing through the gap between the dynamic and static rotors through the setting of the air curtain ring groove sealing device, ensuring that the mixed air flow must be sorted by the classifying wheel blades before being discharged through the discharge pipe, ensuring the classification particle size range and particle size;

[0025] 2. The air curtain ring groove sealing device for air flow sorting of the utility model, the air curtain flow formed by the air flow in the air curtain air supply chamber after passing through the air curtain chamber outlet guide hole presents a positive pressure state, and after colliding and communicating with the rising mixed air flow, the material particles in the mixed air flow will be further dispersed to avoid the agglomeration of materials and the situation that large particles carry small particles. In this way, the small particles that are agglomerated together can be dispersed into the original state, and the entrained small particles can be washed out by the air flow, so that the particles are completely separated, and the classification efficiency and classification accuracy are improved;

[0026] 3. The air curtain ring groove sealing device for airflow sorting of the utility model does not need to be precisely controlled, and the gap between the grading wheel and the air curtain ring groove sealing device can be between 0.1 and 1.5 mm, which reduces the difficulty of assembly, reduces the time for later parts replacement, and reduces the skill quality requirements of operators;

[0027] 4. The air curtain ring groove sealing device for air flow sorting of the utility model has an air curtain ring groove sealing device for air flow sorting, and the air flow guide at the wedge mouth makes the air flow field in the working area stable, reduces turbulence, and ensures classification accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of the device of the utility model;

[0030] Figure 2 It is a structural schematic diagram of the grading wheel in the device of the utility model;

[0031] Figure 3 for Figure 2 Right side view;

[0032] Figure 4 It is a structural schematic diagram of the air curtain ring groove sealing device in the device of the utility model;

[0033] Figure 5 for Figure 4 Left side view;

[0034] Figure 6 for Figure 1 Schematic diagram of the enlarged structure in the middle circle;

[0035] Figure 7This is a schematic diagram of the structure of the utility model device applied to airflow sorting equipment;

[0036] Reference numerals:

[0037] 1-Upper cabin;

[0038] 2-classifying wheel; 200-dynamic sealing end face; 201-ring groove boss; 202-classifying wheel ring groove; 203-discharging hole;

[0039] 3-air curtain ring groove sealing device; 300-air outlet end face; 301-air curtain chamber wedge; 302-air curtain chamber ring groove; 303-discharge pipe; 304-air curtain air supply chamber; 305-air curtain chamber air outlet guide hole; 306-connection flange; 307-connection ear; 308-air curtain chamber air inlet;

[0040] 4- Motor;

[0041] 5-Lower cabin;

[0042] 6-feeding port;

[0043] 7-Observation window;

[0044] 8- Coarse powder discharge port. DETAILED DESCRIPTION

[0045] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0051] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0052] The utility model embodiment provides an air curtain ring groove sealing device for air flow sorting, such as Figures 1 to 5As shown, the device is fixedly arranged in the upper cabin 1 of the airflow sorting equipment, and includes a classification wheel 2 and an air curtain ring groove sealing device 3 which are arranged opposite to each other.

[0053] The end face of the classifying wheel 2 facing the air curtain ring groove sealing device 3 is a dynamic sealing end face 200, and the dynamic sealing end face includes a ring groove boss 201 and a classifying wheel ring groove 202 arranged on the ring groove boss 201, wherein the classifying wheel 2 includes a front impeller disc, a rear impeller disc, blades installed between the front impeller disc and the rear impeller disc, and a discharge hole formed by the blades, the rear impeller disc is connected to the rotating shaft of the motor 4, the dynamic sealing end face 200 is arranged on the front impeller disc, and the classifying wheel ring groove 202 is a plurality of concentric ring grooves distributed along the radial direction of the discharge hole 203, and the side surface of the ring groove has an inward inclination.

[0054] The end face of the air curtain annular groove sealing device 3 facing the grading wheel 2 is an air outlet end face 300, and the air outlet end face 300 includes an air curtain chamber wedge 301 that is recessed inward and an air curtain chamber annular groove 302 that is arranged on the air curtain chamber wedge 301, wherein the air curtain annular groove sealing device 3 includes a discharge pipe 303 and an air curtain air supply chamber 304 that is sleeved on the outer periphery of the discharge pipe, the air outlet end face 300 is arranged on the air curtain air supply chamber 304, and the air curtain chamber annular groove 302 is a plurality of concentric annular grooves that are radially distributed along the discharge pipe 303, and the side faces of the annular grooves have an outward inclination;

[0055] The convex surface of the grading wheel ring groove 202 is located in the concave surface of the air curtain chamber ring groove 302, and the two are clearance-matched, and the clearance size of the clearance match is 0.1-1.5 mm; the air outlet end surface 300 is also provided with an air curtain chamber air outlet guide hole 305, which is located at the outer end of the air curtain chamber wedge opening 301 and is connected to the air curtain air supply chamber 304, and is used to pass the compressed air in the air curtain air supply chamber 304 (such as Figure 6 The air pressure generated by the airflow passing through the gap between the grading wheel ring groove 202 and the air curtain chamber ring groove 302 forms an air curtain, as shown in FIG. Figure 6 The air curtain chamber air outlet guide hole 305 is arranged obliquely to the air outlet end surface 300, and the angle of inclination is 5-30° with the generatrix, and there are a plurality of air curtain chamber air outlet guide holes 305 arranged in a circumferential array along the air outlet end surface 300, such as Figure 5 shown.

[0056] The tail end of the discharge pipe 303 of the air curtain ring groove sealing device 3 is provided with a connecting flange 306, which is connected to the next-level air flow sorting equipment or to the cyclone collecting box; the outer wall of the air curtain supply chamber 304 of the air curtain ring groove sealing device 3 is provided with a connecting ear 307, which is fixedly connected to the upper cabin body 1, and the outer wall of the air curtain supply chamber 304 is also provided with an air curtain chamber air inlet 308. The compressed air flow enters the air curtain supply chamber from the air curtain chamber air inlet and then flows out from the air curtain chamber air outlet guide hole 305. Figure 6In the direction of the arrow.

[0057] The utility model is a gas curtain ring groove sealing device for airflow sorting, such as Figure 7 As shown, the air curtain ring groove sealing device is arranged in the upper cabin of the air flow sorting device, and the lower cabin 5 is provided with a feed port 6, an observation window 7 and a coarse powder discharge port 8. The overall structure of the air flow sorting device of the air curtain ring groove sealing device for air flow sorting is as shown in FIG. Figure 1 After the mixed powders of different particle sizes to be sorted enter the lower cabin 5 from the feed port 6, the mixed powders move with the rising airflow under the drag of the fan at the tail end of the discharge pipe 303 ( Figure 7 The high-speed rotating classifying wheel 2 forms an inherent airflow field due to its special blade gap and blade shape. The classifying wheel classifies the mixed powder into coarse and fine particles. The coarse particles are intercepted and collided by the blades and move away from the classifying wheel 2 under the action of centrifugal force, and finally collide with the surrounding cavity wall (as shown in FIG. Figure 7 The fine particles enter through the gap between the blades of the classifying wheel and are discharged from the discharge hole 203 of the classifying wheel and enter the discharge pipe 303 of the air curtain ring groove sealing device 3, and enter the next stage of air flow sorting equipment or cyclone collection box to be collected (such as Figure 7 The utility model air curtain ring groove sealing device, in the gap between the sealing end face of the grading wheel and the outlet end face of the air curtain ring groove sealing device, introduces external airflow from the air curtain air supply chamber and introduces the external airflow into the gap through a plurality of air curtain chamber air outlet guide holes at the circumference of the outlet end face to form a positive pressure, and forms an air curtain after the pressure difference is generated on this surface with the negative pressure fan gravity, blocking the rising airflow through this gap, thereby preventing the mixed material from entering the discharge pipe without being sorted by the classifier. On the other hand, the grading wheel ring groove and the air curtain chamber ring groove are matched through the gap between the concave and convex surfaces, and the airflow forms a thread pair with a special angle on this surface. When the grading wheel 2 rotates at high speed with the rotating shaft of the motor 4, an airflow vortex is generated, and this airflow vortex forms a whole with the aforementioned air curtain, from one surface of the air curtain to a three-dimensional space of the vortex, further preventing the rising airflow carrying the material from passing through.

Claims

1. An air curtain ring groove sealing device for airflow sorting, fixedly arranged in the upper cabin of the airflow sorting equipment, characterized in that: It includes a grading wheel and an air curtain ring groove sealing device which are arranged opposite to each other; The end surface of the classifying wheel facing the air curtain annular groove sealing device is a dynamic sealing end surface, and the dynamic sealing end surface includes an annular groove boss and a classifying wheel annular groove arranged on the annular groove boss; The end surface of the air curtain annular groove sealing device facing the classifying wheel is an air outlet end surface, and the air outlet end surface includes an inwardly concave air curtain chamber wedge opening and an air curtain chamber annular groove arranged on the air curtain chamber wedge opening; Among them, the convex surface of the grading wheel ring groove is located in the concave surface of the air curtain chamber ring groove, and the two are in a clearance fit; the air curtain ring groove sealing device includes a discharge pipe and an air curtain air supply chamber sleeved on the outer periphery of the discharge pipe, the air outlet end face is arranged on the air curtain air supply chamber, and the air outlet end face is also provided with an air curtain chamber air outlet guide hole, the air curtain chamber air outlet guide hole is located at the outer end of the air curtain chamber wedge mouth and is connected with the air curtain air supply chamber, which is used for the compressed air in the air curtain air supply chamber to pass through and generate air pressure to form an air curtain with the airflow passing through the gap between the grading wheel ring groove and the air curtain chamber ring groove.

2. The air curtain ring groove sealing device for airflow sorting according to claim 1, characterized in that: The clearance size of the clearance fit is 0.1-1.5 mm.

3. The air curtain ring groove sealing device for airflow sorting according to claim 1, characterized in that: The classifying wheel includes a front impeller disc, a rear impeller disc, blades installed between the front impeller disc and the rear impeller disc, and a discharge hole formed by the blades. The rear impeller disc is connected to the rotating shaft of the motor, and the dynamic sealing end face is arranged on the front impeller disc.

4. The air curtain ring groove sealing device for airflow sorting according to claim 3, characterized in that: The grading wheel annular grooves are a plurality of concentric annular grooves distributed radially along the discharge hole, and the side surfaces of the annular grooves have an inward inclination; the air curtain chamber annular grooves are a plurality of concentric annular grooves distributed radially along the discharge hole, and the side surfaces of the annular grooves have an outward inclination.

5. The air curtain ring groove sealing device for airflow sorting according to claim 1, characterized in that: The air outlet guide hole of the air curtain chamber is arranged obliquely to the air outlet end surface.

6. The air curtain ring groove sealing device for airflow sorting according to claim 5, characterized in that: The air curtain chamber has a plurality of air outlet guide holes arranged in a circumferential array along the air outlet end surface.

7. An air curtain ring groove sealing device for airflow sorting according to claim 5 or 6, characterized in that: The inclination angle of the air outlet guide hole of the air curtain chamber is 5-30° with the busbar.

8. The air curtain ring groove sealing device for airflow sorting according to claim 1, characterized in that: The tail end of the discharge pipe of the air curtain ring groove sealing device is provided with a connecting flange, which is connected to the next-stage airflow sorting equipment or to the cyclone collection box; The outer wall of the air curtain air supply chamber of the air curtain ring groove sealing device is provided with a connecting ear, which is fixedly connected to the upper cabin body.

9. The air curtain ring groove sealing device for airflow sorting according to claim 1, characterized in that: An air curtain chamber air inlet is also provided on the outer wall of the air curtain chamber, and air flows into the air curtain chamber from the air curtain chamber air inlet and then flows out from the air curtain chamber air outlet guide hole.

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