High-precision grading wheel of grading machine

Abstract

The utility model discloses a high-precision grading wheel of a grading machine, which comprises two end part rings, a sealing structure is arranged between the end part ring positioned on the left side of the grading wheel and the left end of a shell, a sealing structure is also arranged between the end part ring positioned on the right side of the grading wheel and the right end of the shell, and a grading sheet is arranged between the two end part rings. And sleeves extending leftwards and rightwards are arranged on the inner sides of the grading pieces, connecting plates are arranged between the sleeves and the end rings, passing gaps are formed between the adjacent connecting plates, and the grading wheel is in transmission connection with a rotation driving mechanism. Cutting is carried out through centrifugal force generated by the rotating speed of the grading wheel and negative pressure gravitational force generated by an induced draft fan connected with a fine material outlet, coarse particles and fine particles in raw material powder are separated, kinetic energy obtained by the fine particles greatly overcomes gravity, the fine particles penetrate through the grading wheel to be separated out, and the coarse particles fall into a discharging bin under the action of the gravity; fine material discharging can be achieved on the left side and the right side of the grading wheel, and the grading efficiency is higher.

Description

Technical Field

[0001] The utility model relates to a grading wheel of a grading machine with high grading accuracy. Background Art

[0002] Most of the existing classifiers are relatively large in size. For example, a multi-rotor horizontal airflow classifier disclosed in CN202222708872.6 includes a main cylinder, a cone cylinder, a bulk cylinder and a receiving cone; the main cylinder, the cone cylinder, the bulk cylinder and the receiving cone are connected in sequence; the receiving cone is provided with a feed pipe and an air lock; a bulk device is provided inside the bulk cylinder, and the bulk device is fixedly connected to the end of the feed pipe; the opening of the bulk device faces the cone cylinder; a plurality of cage impeller rotors are arranged around the main cylinder, a discharge pipe is fixedly connected to the top of the main cylinder, and the discharge port of the cage impeller rotor is connected to the discharge pipe; a plurality of disassembly racks are arranged on the main cylinder, and the disassembly racks correspond to the cage impeller rotors; in this scheme, the output is increased by setting a plurality of rotors, and multi-stage screening is performed at the same time; although it can improve the efficiency of classification to a certain extent, the structure is relatively complex, the floor space is large, and it is not conducive to layout in a factory building with a low height. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a high-precision classifier classifying wheel with small volume, compact structure and high classification efficiency.

[0004] The technical solution of the utility model is: a high-precision classifier classifying wheel, comprising two end rings, a sealing structure is provided between the end ring located on the left side of the classifying wheel and the left end of a shell, a sealing structure is also provided between the end ring located on the right side of the classifying wheel and the right end of the shell, a classifying sheet is provided between the two end rings, a sleeve extending left and right is provided on the inner side of the classifying sheet, a connecting plate is provided between the sleeve and the end rings, a through gap is provided between adjacent connecting plates, and the classifying wheel is transmission-connected with a rotation driving mechanism. The invention comprises a shell, wherein the left and right ends of the shell are respectively provided with side through holes, and the side through holes are communicated with the inner cavity of the shell, a classifying wheel is rotatably installed in the shell, and the classifying wheel comprises two end rings, a sealing structure is provided between the end ring located on the left side of the classifying wheel and the left end of the shell, and a sealing structure is also provided between the end ring located on the right side of the classifying wheel and the right end of the shell, a classifying sheet is provided between the two end rings, a sleeve extending left and right is provided on the inner side of the classifying sheet, a connecting plate is provided between the sleeve and the end ring, and a passing gap is provided between adjacent connecting plates, a left discharge shell is provided on the left side of the shell, and the shell A right discharging shell is provided on the right side, and the left discharging shell, the right discharging shell and the corresponding side through hole are communicated with each other. The left discharging shell and the right discharging shell are respectively provided with fine material outlets, and the fine material outlets are connected with induced draft fans. A feed port is also provided on the shell, and a blowing port for blowing away the material entering from the feed port is also provided on the shell. The classifying wheel is transmission-connected with a rotating drive mechanism, and a lower material bin is also installed at the lower part of the shell, and a coarse material outlet is provided at the lower end of the lower material bin, and the lower material bin is communicated with the inner cavity of the shell, and a secondary air inlet located below the classifying wheel is also provided on the shell and / or the lower material bin.

[0005] As a preferred technical solution, the sealing structure includes a labyrinth sealing mechanism provided between the end ring and the housing.

[0006] As a preferred technical solution, the sealing structure also includes a sealing sleeve fixedly installed between the shell and the left discharge shell and between the shell and the right discharge shell, the sealing sleeve includes an inner sleeve and an outer sleeve sleeved outside the inner sleeve, an inner retaining ring adjacent to the inner side of the shell and an outer retaining ring adjacent to the outer side of the shell are provided between the inner sleeve and the outer sleeve, and the labyrinth sealing mechanism is provided between the inner retaining ring and the end ring.

[0007] As a preferred technical solution, the labyrinth sealing mechanism includes an annular groove arranged on the inner retaining ring, a sealing ring cooperating with the annular groove is provided on the end ring, a ventilation hole is provided at the bottom of the annular groove, and an air-sealed air inlet hole is provided on the outer sleeve, and the air-sealed air inlet hole and the ventilation hole are connected to each other.

[0008] As a preferred technical solution, the labyrinth sealing mechanism further includes an end annular groove disposed on the end ring and located inside the sealing ring, and the inner retaining ring is provided with an inner sealing ring that cooperates with the end annular groove.

[0009] As a preferred technical solution, retaining rings are provided at both ends of the sleeve, and the connecting plate is provided between the retaining rings and the end rings.

[0010] As a preferred technical solution, the cross-sectional area of ​​one end of the connecting plate adjacent to the retaining ring is larger than the cross-sectional area of ​​one end of the connecting plate adjacent to the end ring.

[0011] As a preferred technical solution, the rotation drive mechanism includes a high-speed variable frequency motor.

[0012] Due to the adoption of the above technical solution, a high-precision classifier classifying wheel includes two end rings, a sealing structure is provided between the end ring located on the left side of the classifying wheel and the left end of the shell, a sealing structure is also provided between the end ring located on the right side of the classifying wheel and the right end of the shell, a classifying sheet is provided between the two end rings, a sleeve extending left and right is provided on the inner side of the classifying sheet, a connecting plate is provided between the sleeve and the end ring, and a through gap is provided between adjacent connecting plates, and the classifying wheel is connected to a rotating drive mechanism. The centrifugal force generated by the rotating speed of the classifying wheel and the negative pressure gravity generated by the induced draft fan connected to the fine material outlet are cut to separate the coarse and fine particles in the raw material powder. Due to the action of gravity and centrifugal force, the kinetic energy obtained by the fine particles is large enough to overcome gravity and pass through the classifying wheel to be separated, and the coarse particles fall into the lower bin under the action of gravity. The left and right sides of the classifying wheel can realize fine material discharge, and the classification efficiency is higher. The rotation of the classifying wheel of this equipment adopts high-speed motor frequency conversion control, and the classifying wheel can rotate at high speed to realize the classification of high and fine particles. The classification of multiple sections with different particle sizes can be achieved by adjusting the speed of the classifying wheel to achieve different centrifugal forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 yes Figure 1 Side view of

[0015] Figure 3 This is a reference diagram of the use state of an embodiment of the utility model;

[0016] Figure 4 yes Figure 3 A partial enlarged view of point I in the middle;

[0017] Figure 5 yes Figure 3 A partial enlarged view of point II in the middle. DETAILED DESCRIPTION

[0018] like Figures 1 to 5 As shown, a high-precision classifier classifying wheel includes two end rings 1, a sealing structure is provided between the end ring located on the left side of the classifying wheel and the left end of the shell 2, and a sealing structure is also provided between the end ring 1 located on the right side of the classifying wheel and the right end of the shell 2, a classifying sheet 3 is provided between the two end rings 1, and a sleeve 4 extending left and right is provided on the inner side of the classifying sheet 3, a connecting plate 5 is provided between the sleeve 4 and the end ring 1, and a through gap 6 is provided between adjacent connecting plates 5, and the classifying wheel is connected to a rotating drive mechanism. A main shaft 13 is installed in the sleeve, and in this embodiment, the centrifugal force generated by the rotating speed of the classifying wheel and the negative pressure gravity generated by the induced draft fan connected to the fine material outlet 7 are used to cut and separate the coarse and fine particles in the raw material powder. Due to the action of gravity and centrifugal force, the fine particles have greater kinetic energy to overcome gravity and pass through the classifying wheel to be separated, and the coarse particles fall into the lower bin 8 under the action of gravity. The rotation of the grading wheel of this equipment is controlled by high-speed motor frequency conversion. The grading wheel can rotate at high speed. This equipment can achieve different centrifugal forces by adjusting the speed of the grading wheel to achieve multi-stage grading of different particle sizes. There is a sealing structure between the left and right sides of the grading wheel and the shell, so that the grading wheel can rotate at a higher speed, and the left and right sides of the grading wheel can achieve fine material discharge, and the grading efficiency is higher.

[0019] like Figure 3 , Figure 4 and Figure 5 As shown, the sealing structure includes a labyrinth sealing mechanism provided between the end ring 1 and the housing 2 .

[0020] In this embodiment, the left and right ends of the shell are respectively provided with side through holes 9, and the side through holes 9 are interconnected with the inner cavity of the shell 2. A left discharge shell 10 is provided on the left side of the shell 2, and a right discharge shell 11 is provided on the right side of the shell. The left discharge shell 10, the right discharge shell 11 and the corresponding side through holes 9 are interconnected. The left discharge shell 10 and the right discharge shell 11 are respectively provided with fine material outlets 7, and the fine material outlets 7 are connected to induced draft fans. A feed port is also provided on the shell 2, and a blowing port for blowing away the material entering from the feed port is also provided on the shell.

[0021] like Figure 3 , Figure 4 and Figure 5As shown, the sealing structure also includes a sealing sleeve 15 fixedly installed between the housing 2 and the left discharge housing 10 and between the housing 1 and the right discharge housing 11. The left discharge housing 10 and the right discharge housing 11 are connected to the corresponding side through-holes 9 through the sealing sleeve. The sealing sleeve 15 includes an inner sleeve 16 and an outer sleeve 17 sleeved outside the inner sleeve 16. An inner retaining ring 18 adjacent to the inner side of the housing 2 and an outer retaining ring 19 adjacent to the outer side of the housing 2 are provided between the inner sleeve 16 and the outer sleeve 17. The labyrinth sealing mechanism is provided between the inner retaining ring 18 and the end ring 1. The labyrinth sealing mechanism effectively prevents particles from escaping through the gap between the grading wheel and the housing, thereby ensuring the sealing performance.

[0022] The labyrinth seal mechanism includes an annular groove 20 provided on the inner retaining ring 18, a sealing ring 21 matched with the annular groove 20 is provided on the end ring 1, a ventilation hole 22 is provided at the bottom of the annular groove 20, and an air-sealed air inlet 23 is provided on the outer sleeve 17, and the air-sealed air inlet 23 is connected to the ventilation hole 22. The airflow entering the air-sealed air inlet 23 further prevents particles from entering the gap between the sealing sleeve and the classifying wheel, thereby improving the sealing performance.

[0023] The labyrinth seal mechanism further includes an end annular groove 24 disposed on the end ring 1 and located inside the sealing ring 21, and an inner sealing ring 25 is disposed on the inner retaining ring 18 and cooperates with the end annular groove 24. The cooperation between the inner sealing ring and the end annular groove 25 further reduces the possibility of particle escape.

[0024] like Figure 1 and Figure 3 As shown, baffle rings 12 are provided at both ends of the sleeve 4, and the connecting plate 5 is provided between the baffle rings 12 and the end rings 1. A recess is formed between the baffle rings 12 at both ends, so that the particles entering the classifying wheel can be accommodated in the recess. When the particles move toward the two ends in the classifying wheel, the fine particles adhering to the coarse particles are broken up due to the obstruction of the baffle rings 12, thereby improving the classification efficiency.

[0025] like Figure 2 As shown, the cross-sectional area of ​​one end of the connecting plate 5 adjacent to the baffle ring 12 is larger than the cross-sectional area of ​​one end of the connecting plate 5 adjacent to the end ring 1. The blocking of the connecting plate to the particles is reduced, ensuring the smooth discharge of fine powder.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Without departing from the spirit and scope of the utility model, the utility model may be subject to various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision classifier classifying wheel, rotatably mounted in a housing, characterized in that: It includes two end rings, a sealing structure is provided between the end ring located on the left side of the classifying wheel and the left end of the shell, a sealing structure is also provided between the end ring located on the right side of the classifying wheel and the right end of the shell, a classifying sheet is provided between the two end rings, a sleeve extending left and right is provided on the inner side of the classifying sheet, a connecting plate is provided between the sleeve and the end rings, a passing gap is provided between adjacent connecting plates, and the classifying wheel is transmission-connected with a rotating drive mechanism.

2. The high-precision classifier classifying wheel according to claim 1, characterized in that: The sealing structure includes a labyrinth sealing mechanism disposed between the end ring and the housing.

3. The high-precision classifier classifying wheel according to claim 2, characterized in that: The sealing structure also includes a sealing sleeve fixedly installed between the shell and the left discharge shell and between the shell and the right discharge shell, the sealing sleeve includes an inner sleeve and an outer sleeve sleeved outside the inner sleeve, an inner retaining ring adjacent to the inner side of the shell and an outer retaining ring adjacent to the outer side of the shell are provided between the inner sleeve and the outer sleeve, and the labyrinth sealing mechanism is provided between the inner retaining ring and the end ring.

4. The high-precision classifier classifying wheel according to claim 3, characterized in that: The labyrinth sealing mechanism includes an annular groove arranged on the inner retaining ring, a sealing ring cooperating with the annular groove is provided on the end ring, a ventilation hole is provided at the bottom of the annular groove, and an air-sealed air inlet hole is provided on the outer sleeve, and the air-sealed air inlet hole and the ventilation hole are connected to each other.

5. The high-precision classifier classifying wheel according to claim 4, characterized in that: The labyrinth sealing mechanism also includes an end annular groove disposed on the end ring and located inside the sealing ring, and an inner sealing ring matched with the end annular groove is disposed on the inner retaining ring.

6. The high-precision classifier classifying wheel according to claim 1, characterized in that: The two ends of the sleeve are provided with retaining rings, and the connecting plate is arranged between the retaining rings and the end rings.

7. The high-precision classifier classifying wheel according to claim 6, characterized in that: The cross-sectional area of ​​one end of the connecting plate adjacent to the retaining ring is larger than the cross-sectional area of ​​one end of the connecting plate adjacent to the end ring.

8. The high-precision classifier classifying wheel according to any one of claims 1 to 7, characterized in that: The rotation driving mechanism comprises a high-speed variable frequency motor.

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