High-precision classifier shell

Abstract

The utility model discloses a high-precision grader shell which comprises a main shell body, side through holes are formed in the left end and the right end of the main shell body respectively, a grading wheel is installed in the main shell body in a rotating mode, a sealing structure is arranged between the grading wheel and the left end of the main shell body, and a sealing structure is also arranged between the grading wheel and the right end of the main shell body. A left discharging shell is arranged on the left side of the main shell, a right discharging shell is arranged on the right side of the main shell, fine material outlets are formed in the left discharging shell and the right discharging shell respectively, a feeding port is further formed in the main shell, an air blowing port is further formed in the main shell, a discharging bin is further installed on the lower portion of the main shell, and a coarse material outlet is formed in the lower end of the discharging bin. The discharging bin communicates with an inner cavity of the main shell. Sealing structures are arranged between the left side and the right side of the grading wheel and the main shell, end cover bearing seats are fixedly installed on the outer side of the left discharging shell and the outer side of the right discharging shell respectively, the grading wheel can rotate at a high rotating speed, 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 shell of a classifier with high classification accuracy. Background Art

[0002] Most of the existing classifiers are large in size. For example, the air flow classifier equipment disclosed in CN202023040503.1 includes a classifier body, an upper outer surface of the classifier body is provided with a motor, and the outer surface of the classifier body is provided with a fine powder discharge outlet, and the lower end of the fine powder discharge outlet is provided with an impact plate, and the lower end of the impact plate is provided with a classifying chamber, and the two sides of the classifying chamber are respectively provided with a No. 1 primary air inlet and a No. 2 primary air inlet, a classifying wheel is provided at the lower end of the classifying chamber, and the classifying wheel is equipped with classifying blades, and the lower end of the classifying wheel is provided with a coarse powder discharge outlet, and a secondary air inlet is provided on one side of the coarse powder discharge outlet; although particle classification can be achieved to a certain extent, it occupies a large area, which is not conducive to arrangement 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 housing with a small volume, compact structure and effective guarantee of classification accuracy.

[0004] The technical solution of the utility model is: a high-precision classifier housing, comprising a main housing, the left and right ends of the main housing are respectively provided with side through holes, the side through holes are communicated with the inner cavity of the main housing, a classifying wheel is rotatably installed in the main housing, a sealing structure is provided between the classifying wheel and the left end of the main housing, a sealing structure is also provided between the classifying wheel and the right end of the main housing, a left discharge housing is provided on the left side of the main housing, a right discharge housing is provided on the right side of the main housing, the left discharge housing, the right discharge housing and the opposite The corresponding side through holes are interconnected, the left discharge shell and the right discharge shell are respectively provided with fine material outlets, the fine material outlets are connected to induced draft fans, the main shell is also provided with a feed port, the main shell is also provided with a blowing port for blowing away the materials entering from the feed port, a lower bin is also installed at the lower part of the main shell, a coarse material outlet is provided at the lower end of the lower bin, the lower bin is interconnected with the inner cavity of the main shell, and the main shell and / or the lower bin are also provided with a secondary air inlet located below the grading wheel.

[0005] As a preferred technical solution, the feed port is located on the upper surface of the main shell, the air outlet is located on the side surface of the main shell, and the feed port is located above the classifying wheel and on the left or right side of the main shaft of the classifying wheel.

[0006] As a preferred technical solution, the sealing structure includes a labyrinth sealing mechanism provided between the classifying wheel and the main housing.

[0007] As a preferred technical solution, the sealing structure also includes a sealing sleeve fixedly installed between the main shell and the left discharge shell and between the main 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 main shell and an outer retaining ring adjacent to the outer side of the main 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 grading wheel.

[0008] 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 of the grading wheel, 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.

[0009] As a preferred technical solution, the labyrinth sealing mechanism further comprises an end annular groove located inside the sealing ring on the end ring of the grading wheel, and an inner sealing ring cooperating with the end annular groove is provided on the inner retaining ring.

[0010] As a preferred technical solution, end cover bearing seats are fixedly installed on the outer sides of the left discharge shell and the right discharge shell, respectively, an outer sleeve is installed on the outer side of the main shaft of the grading wheel, a center hole wall of the end cover bearing seat is adjacent to one end of the main shell and has a plurality of annular grooves, a bearing is installed at the end of the main shaft, an inner ring of the bearing is located between the shaft end retaining ring and the outer sleeve, a sealed air inlet through hole is opened on the end cover bearing seat, and the sealed air inlet through hole is located between the annular groove and the end of the outer sleeve.

[0011] As a preferred technical solution, the coarse material outlet is located between the feed inlet and the axis of the main shaft.

[0012] As a preferred technical solution, the lower material bin includes a first bin wall extending vertically downward and parallel to the axis of the main shaft, the lower material bin also includes a second bin wall opposite to the first bin wall and with the lower end inclined toward the first bin wall, the secondary air inlet is opened on the first bin wall, a secondary air inlet pipe is installed on the secondary air inlet, and the axis of the secondary air inlet pipe extends to the lower side of the grading wheel.

[0013] Due to the adoption of the above technical solution, a high-precision classifier housing comprises a main housing, the left and right ends of the main housing are respectively provided with side through holes, the side through holes are communicated with the inner cavity of the main housing, a classifying wheel is rotatably installed in the main housing, a sealing structure is provided between the classifying wheel and the left end of the main housing, a sealing structure is also provided between the classifying wheel and the right end of the main housing, a left discharge housing is provided on the left side of the main housing, a right discharge housing is provided on the right side of the main housing, the left discharge housing, the right discharge housing and the pair of The corresponding side through holes are interconnected, and the left discharge shell and the right discharge shell are respectively provided with a fine material outlet, and the fine material outlet is connected to an induced draft fan. The main shell is also provided with a feed port, and the main shell is also provided with a blowing port for blowing away the material entering from the feed port. A lower bin is also installed at the lower part of the main shell, and a coarse material outlet is provided at the lower end of the lower bin. The lower bin is interconnected with the inner cavity of the main shell, and the main shell and / or the lower bin are also provided with a secondary air inlet located below the grading wheel. A sealing structure is provided between the left and right sides of the grading wheel and the main shell, and the outer side of the left discharge shell and the outer side of the right discharge shell are respectively fixedly installed with end cover bearing seats, so that the grading wheel can rotate at a higher speed, and the left and right sides of the grading wheel can realize fine material discharge, and the grading efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 yes Figure 1 A partial enlarged view of point I in the middle;

[0016] Figure 3 yes Figure 1 A partial enlarged view of position II in the middle;

[0017] Figure 4 yes Figure 1 Side view of. DETAILED DESCRIPTION

[0018] like Figures 1 to 4As shown, a high-precision classifier comprises a main shell 1, the left end 2 and the right end of the main shell 1 are respectively provided with side through holes 4, the side through holes 4 are communicated with the inner cavity of the main shell 1, a classifying wheel 5 is rotatably installed in the main shell 1, a sealing structure is provided between the classifying wheel and the left end of the main shell, and a sealing structure is also provided between the classifying wheel and the right end of the main shell, a left discharge shell 11 is provided on the left side of the main shell 1, and a right discharge shell 12 is provided on the right side of the main shell 1, and the left discharge shell 11, the right discharge shell 12 and the corresponding side through holes 4 are connected to each other. The left discharge shell 11 and the right discharge shell 12 are connected, respectively, with a fine material outlet 13, and the fine material outlet 13 is connected to an induced draft fan. The main shell 1 is also provided with a feed port 14, and the main shell 1 is also provided with a blowing port 15 for blowing away the material entering from the feed port 14. A lower bin 16 is also installed at the lower part of the shell 1, and a material outlet 17 is provided at the lower end of the lower bin 16. The lower bin 16 is connected with the inner cavity of the shell 1, and the shell 1 and / or the lower bin 16 are also provided with a secondary air inlet 3 located below the classifying wheel 5. The centrifugal force generated by the rotating speed of the classification wheel and the negative pressure gravity generated by the induced draft fan connected to the fine material outlet 13 are used to cut and separate the coarse and fine particles in the raw material powder. Because the coarse and fine particles are under the action of gravity and centrifugal force, the kinetic energy of the fine particles is large, overcoming gravity and passing through the classification wheel to be separated, and the coarse particles fall into the lower bin 16 under the action of gravity. The coarse particles adsorb the fine particles and are dispersed by the airflow entering the secondary air inlet 3 during the falling process, so that the fine particles are separated again. A sealing structure is provided between the left and right sides of the classification wheel and the shell, so that the classification wheel can rotate at a higher speed, and the left and right sides of the classification wheel can realize fine material discharge, and the classification efficiency is higher.

[0019] like Figure 1 and Figure 4 As shown, the feed port is located on the upper surface of the shell, the air outlet is located on the side surface of the shell, and the feed port is located above the classifying wheel and on the left or right side of the main shaft of the classifying wheel. The air outlet blows away the material entering from the feed port, which is more conducive to classification.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the sealing structure includes a labyrinth sealing mechanism provided between the classifying wheel 5 and the main housing 1 .

[0021] The sealing structure also includes a sealing sleeve 18 fixedly installed between the main housing 1 and the left discharge housing 11 and between the main housing 1 and the right discharge housing 12. The left discharge housing and the right discharge housing are connected to the corresponding side through-holes through the sealing sleeve. The sealing sleeve 18 includes an inner sleeve 19 and an outer sleeve 20 sleeved outside the inner sleeve 19. An inner retaining ring 21 adjacent to the inner side of the main housing 1 and an outer retaining ring 22 adjacent to the outer side of the main housing 1 are provided between the inner sleeve 19 and the outer sleeve 20. The labyrinth sealing mechanism is provided between the inner retaining ring 21 and the classifying wheel 5. The labyrinth sealing mechanism effectively prevents particles from escaping through the gap between the classifying wheel and the housing, thereby ensuring the sealing performance.

[0022] like Figure 2 As shown, the labyrinth seal mechanism includes an annular groove 23 provided on the inner retaining ring 21, a sealing ring 24 matched with the annular groove 23 is provided on the classifying wheel 5, a ventilation hole 25 is provided at the bottom of the annular groove 23, and an air-sealed air inlet 26 is provided on the outer sleeve 20, and the air-sealed air inlet 26 and the ventilation hole 25 are connected to each other. The airflow entering the air-sealed air inlet 26 further prevents particles from entering the gap between the sealing sleeve and the classifying wheel, thereby improving the sealing performance.

[0023] like Figure 2 As shown, the labyrinth seal mechanism further includes an end annular groove 27 disposed on the classifying wheel 5 and located inside the sealing ring 24, and an inner sealing ring 28 is disposed on the inner retaining ring 21 and cooperates with the end annular groove 27. The cooperation between the inner sealing ring 28 and the end annular groove 27 further reduces the possibility of particle escape.

[0024] like Figure 1 and Figure 3 As shown, the outer side of the left discharge housing 11 and the outer side of the right discharge housing 12 are respectively fixedly mounted with end cover bearing seats 30, the sleeve 8 is sleeved with a main shaft 31, the main shaft 31 is sleeved with an outer sleeve 32, the central hole wall of the end cover bearing seat 30 is provided with a plurality of annular grooves 33 at one end adjacent to the main housing 1, the end of the main shaft 31 is provided with a bearing 34, the inner ring of the bearing 34 is located between the shaft end retaining ring 35 and the outer sleeve 32, and the end cover bearing seat 30 is provided with a sealed air intake hole 36, which is located between the annular groove 33 and the end of the outer sleeve 32. The airflow entering the sealed air intake hole 36 enters the annular groove 33, preventing the particles from continuing to move outward, thereby improving the sealing effect.

[0025] The coarse material outlet 17 is located between the feed inlet 14 and the axis of the main shaft 31 .

[0026] like Figure 1 and Figure 4 As shown, the lower bin includes a first bin wall 32 extending vertically downward and parallel to the axis of the main shaft 31, and the lower bin also includes a second bin wall 33 opposite to the first bin wall 31 and with the lower end inclined toward the first bin wall, the secondary air inlet 17 is opened on the first bin wall 32, and a secondary air inlet pipe 34 is installed on the secondary air inlet 17, and the axis of the secondary air inlet pipe 34 extends to the lower side of the grading wheel 5. The coarse material moves downward along the second bin wall 33, and the airflow entering the secondary air inlet pipe moves toward the second bin wall 33, so that the fine particles adsorbed on the coarse particles are dispersed by the secondary air inlet during the falling process, and the fine particles are separated again.

[0027] 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 housing, characterized in that: The hopper comprises a main shell, the left and right ends of the main shell are respectively provided with side through holes, the side through holes are communicated with the inner cavity of the main shell, a classifying wheel is rotatably installed in the main shell, a sealing structure is provided between the classifying wheel and the left end of the main shell, and a sealing structure is also provided between the classifying wheel and the right end of the main shell, a left discharging shell is provided on the left side of the main shell, and a right discharging shell is provided on the right side of the main shell, the left discharging shell, the right discharging shell and the corresponding side through holes are communicated with each other, a fine material outlet is respectively provided on the left discharging shell and the right discharging shell, and the fine material outlet is connected with an induced draft fan, a feeding port is also provided on the main shell, and an air blowing port for blowing away the material entering from the feeding port is also provided on the main shell, a lower bin is also installed at the lower part of the main shell, a coarse material outlet is provided at the lower end of the lower bin, the lower bin is communicated with the inner cavity of the main shell, and a secondary air inlet located below the classifying wheel is also provided on the main shell and / or the lower bin.

2. The high-precision classifier housing according to claim 1, characterized in that: The feed inlet is located on the upper surface of the main shell, the air outlet is located on the side surface of the main shell, and the feed inlet is located above the classifying wheel and on the left or right side of the main shaft of the classifying wheel.

3. The high-precision classifier housing according to claim 1, characterized in that: The sealing structure includes a labyrinth sealing mechanism provided between the classifying wheel and the main housing.

4. The high-precision classifier housing according to claim 3, characterized in that: The sealing structure also includes a sealing sleeve fixedly installed between the main shell and the left discharge shell and between the main 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 main shell and an outer retaining ring adjacent to the outer side of the main 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 grading wheel.

5. The high-precision classifier housing according to claim 4, characterized in that: The labyrinth sealing mechanism includes an annular groove arranged on the inner retaining ring, a sealing ring matching the annular groove is provided on the end ring of the grading wheel, 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.

6. The high-precision classifier housing according to claim 5, characterized in that: The labyrinth sealing mechanism further comprises an end annular groove located inside the sealing ring on the end ring of the grading wheel, and an inner sealing ring matched with the end annular groove is provided on the inner retaining ring.

7. The high-precision classifier housing according to claim 1, characterized in that: The outer sides of the left discharge shell and the right discharge shell are respectively fixedly mounted with end cover bearing seats, the outer side of the main shaft of the grading wheel is covered with an outer sleeve, a central hole wall of the end cover bearing seat is adjacent to one end of the main shell and a plurality of annular grooves are provided, a bearing is mounted at the end of the main shaft, an inner ring of the bearing is located between the shaft end retaining ring and the outer sleeve, a sealed air inlet through hole is opened on the end cover bearing seat, and the sealed air inlet through hole is located between the annular groove and the end of the outer sleeve.

8. The high-precision classifier housing according to claim 7, characterized in that: The coarse material outlet is located between the feed inlet and the axis of the main shaft.

9. The high-precision classifier housing according to claim 7, characterized in that: The lower material bin includes a first bin wall extending vertically downward and parallel to the axis of the main shaft, and the lower material bin also includes a second bin wall opposite to the first bin wall and with the lower end inclined toward the first bin wall. The secondary air inlet is opened on the first bin wall, and a secondary air inlet pipe is installed on the secondary air inlet, and the axis of the secondary air inlet pipe extends to the lower side of the grading wheel.

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