CN220060513U - Impeller sealing structure of vertical mill powder concentrator - Google Patents
Impeller sealing structure of vertical mill powder concentrator Download PDFInfo
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- CN220060513U CN220060513U CN202321466679.4U CN202321466679U CN220060513U CN 220060513 U CN220060513 U CN 220060513U CN 202321466679 U CN202321466679 U CN 202321466679U CN 220060513 U CN220060513 U CN 220060513U
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- sealing
- rotor
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- 238000007789 sealing Methods 0.000 title claims abstract description 167
- 239000000843 powder Substances 0.000 title claims abstract description 77
- 239000011362 coarse particle Substances 0.000 abstract description 22
- 230000007246 mechanism Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Crushing And Pulverization Processes (AREA)
Abstract
The utility model belongs to the technical field of powder separators of vertical mills, and particularly relates to an impeller sealing structure of a powder separator of a vertical mill. The impeller sealing structure of the vertical mill powder concentrator comprises a powder concentrator shell, a rotor upper plate and a sealing ring component fixedly connected to the powder concentrator shell, wherein the sealing ring component comprises a sealing ring upper plate fixedly connected to the powder concentrator shell, a sealing ring outer ring and a sealing ring inner ring fixedly connected to the lower end face of the sealing ring upper plate; the outer ring and the inner ring of the sealing ring are respectively arranged at the outer side and the inner side of the rotor blade, and gaps are respectively arranged between the outer ring and the inner ring of the sealing ring and the rotor blade; the upper end face of the rotor upper plate is provided with a rotor upper plate groove, and the lower end of the inner ring of the sealing ring is arranged in the rotor upper plate groove and a gap is arranged between the lower end of the inner ring of the sealing ring and the rotor upper plate groove. According to the utility model, the sealing effect is improved through the two U-shaped sealing mechanisms, the probability of coarse particles is effectively reduced, and the scrapped sealing ring component can be independently replaced.
Description
Technical Field
The utility model belongs to the technical field of powder separators of vertical mills, and particularly relates to an impeller sealing structure of a powder separator of a vertical mill.
Background
The powder selecting machine with separating function is one powder selecting device with the functions of selecting fine powder product with qualified fineness, discharging the fine powder product out of the cavity of the mill via the material outlet, and returning the coarse powder product with unqualified fineness to the grinding mechanism for grinding. The separating mechanism of the vertical mill powder separator mainly comprises a rotatable cage rotor, coarse powder and fine powder are separated through rotation of the cage rotor, no clearance can be ensured between the cage rotor and a powder separator shell, and a sealing mechanism is arranged between the upper part of the cage rotor and the powder separator shell so as to reduce the probability of coarse particles running in the clearance.
With the strict control of the quality of the product produced by the counter mill, the produced finished product cannot be provided with larger coarse particles, which brings a great challenge to the sealing structure of the traditional powder concentrator, because the coarse particles cannot be prevented from running in the design of the traditional sealing structure.
The existing sealing structure has the following problems:
(1) In order to ensure the sealing effect, as shown in fig. 3, the sealing element of most vertical mill powder separators in the market is welded on the powder separator shell, and is very close to the rotor, and when the rotor rotates at high speed, the dust-containing gas speed at the part is very high, so that the sealing element of the powder separator is more easily worn relative to other parts of the shell, especially the hard materials and the materials with strong abrasiveness are ground, the wearing speed of the sealing element is faster, once the sealing gap is increased, the sealing mechanism cannot ensure good sealing effect, so that the probability of coarse particles is increased sharply, and at the moment, if a user wants to restore the sealing effect, the whole replacement of the powder separator shell connected with the sealing element is only needed, so that the use cost is high, the replacement is difficult, the production is affected, and the production efficiency is reduced.
(2) The sealing element and the cage rotor are large in design clearance, the cage rotor and the sealing element are large in size, the cage rotor belongs to a moving part, the small sealing clearance possibly causes interference between the cage rotor and the sealing element, and in order to reduce processing and manufacturing difficulty, some manufacturers keep the sealing clearance between the sealing element and the rotor large in design, so that the ventilation area of a sealing part is large, a part of coarse particles pass through the part along with air flow, and coarse particle running phenomenon is caused.
(3) The flexible sealing material such as rubber plate is used for sealing the sealing gap, the service life is low, the temperature in the mill is high, dust-containing gas is used for flushing, the rubber plate is also rubbed with the rotor of the powder concentrator rotating at high speed, and various factors can cause the sealing method to fail rapidly.
Disclosure of Invention
In order to solve the technical problems in the prior art, the utility model provides an impeller sealing structure of a vertical mill powder concentrator, which improves the sealing effect by arranging an independently replaceable sealing ring part and two special U-shaped sealing mechanisms, effectively reduces the probability of coarse particles, and can independently replace scrapped sealing ring parts so as to improve the economical efficiency.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the impeller sealing structure of the vertical mill powder concentrator comprises a powder concentrator shell, a rotor upper plate and a sealing ring component fixedly connected to the powder concentrator shell, wherein the sealing ring component comprises a sealing ring upper plate fixedly connected to the powder concentrator shell, a sealing ring outer ring and a sealing ring inner ring fixedly connected to the lower end face of the sealing ring upper plate; the outer ring and the inner ring of the sealing ring are respectively arranged at the outer side and the inner side of the rotor blade, and gaps are respectively arranged between the outer ring and the inner ring of the sealing ring and the rotor blade; the upper end face of the rotor upper plate is provided with a rotor upper plate groove, and the lower end of the inner ring of the sealing ring is arranged in the rotor upper plate groove and a gap is arranged between the lower end of the inner ring of the sealing ring and the rotor upper plate groove.
Preferably, the lower end surface of the outer ring of the sealing ring is higher than the lower end surface of the inner ring of the sealing ring.
Preferably, the lower end face of the outer ring of the sealing ring is higher than the upper end face of the upper plate of the rotor.
Preferably, the sealing ring upper plate is fixedly connected to the powder concentrator shell through bolts.
Preferably, the opposite end surfaces of the powder selecting machine shell and the sealing ring upper plate are respectively provided with a shell clamping groove and a sealing ring upper plate clamping groove, and the powder selecting machine shell and the sealing ring upper plate are clamped together through the shell clamping grooves and the sealing ring upper plate clamping grooves.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, a special double-U-shaped sealing structure and a smaller sealing gap are formed by arranging the outer ring of the sealing ring, the inner ring of the sealing ring and the grooves of the upper plate of the rotor, so that a relatively long and narrow and zigzag sealing gap can be obtained, the amount of dust entering the sealing gap is reduced, most dust particles can strike at the turning part of the sealing gap to change the direction or lose kinetic energy, and the rotor blades strike and discharge the sealing part, so that the probability of coarse particles running at the sealing part is reduced.
2. According to the centrifugal fan principle, the ventilation section on the outer side is large, the ventilation section on the inner side is small, the trend of gas discharge in the sealing groove is aggravated, air flow enters from the clearance between the sealing ring inner ring and the rotor upper plate and is discharged from the clearance between the sealing ring outer ring, coarse powder is blocked by the air flow at the sealing part and is decelerated, and is difficult to enter the sealing part, the ventilation section on the inner side of the sealing ring is small, so that the passing air flow is accelerated, the air flow at the clearance can be ensured to have higher speed, a larger deceleration effect is achieved on coarse particles reaching the clearance, the probability of the sealing structure entering powder can be effectively reduced, the service life of the sealing ring is prolonged, and the production efficiency and the economical efficiency can be improved.
3. The lower end face of the outer ring of the sealing ring is higher than the upper end face of the upper plate of the rotor, so that a certain space is reserved between the end face of the outer ring of the sealing ring and the upper plate of the rotor, and coarse particles in the sealing structure can be conveniently discharged out of the rotor blade.
4. The detachable sealing ring component is adopted, the bolt is used for fixing the powder concentrator shell, the sealing ring component can be independently replaced after the powder concentrator shell is worn, the whole replacement of the powder concentrator shell is avoided, and the production efficiency and the economy can be improved.
Drawings
FIG. 1 is a schematic diagram of the connection structure of the present utility model in a vertical mill powder concentrator.
Fig. 2 is a schematic structural view of the present utility model.
Fig. 3 is a schematic structural view of a sealing structure of a conventional vertical mill powder concentrator.
In the figure: 1. powder concentrator shell, 11, shell clamping groove, 2, sealing ring outer ring, 3, sealing ring upper plate, 31, sealing ring upper plate clamping groove, 4, sealing ring inner ring, 5, bolt assembly, 6, rotor upper plate, 61, rotor upper plate groove, 7, rotor blade, 8, powder concentrator rotor, 91, sorting area, 92, finished product area.
Description of the embodiments
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Examples
Referring to fig. 1 and 2, a impeller sealing structure of a vertical mill powder concentrator comprises a powder concentrator shell 1, a rotor upper plate 6 and a sealing ring component fixedly connected to the powder concentrator shell 1, wherein a powder concentrator rotor 8 is vertically arranged at the right center of the powder concentrator, and the rotor upper plate 6 is fixed on the powder concentrator rotor 8 and rotates along with the powder concentrator rotor 8.
The sealing ring component comprises a sealing ring upper plate 3 fixedly connected to the powder concentrator shell 1, a sealing ring outer ring 2 and a sealing ring inner ring 4 fixedly connected to the lower end face of the sealing ring upper plate 3. The sealing ring upper plate 3 is of an annular structure, namely a through hole for discharging finished powder is formed in the center of the circular plate. The outer ring 2 and the inner ring 4 are rolled by steel plates, and the surface of the ring groove and the upper plate 3 of the sealing ring are machined after the outer ring 2 and the inner ring 4 are welded with the upper plate 3 of the sealing ring, so that the ring groove has good precision to ensure smaller fit clearance with the rotor of the powder concentrator.
The sealing ring upper plate 3 is provided with a circle of sealing ring upper plate threaded hole, the powder concentrator shell 1 is provided with a powder concentrator shell threaded hole corresponding to the sealing ring upper plate threaded hole, the sealing ring upper plate 3 is fixed on the powder concentrator shell 1 through a bolt component 5, and the upper surface of the sealing ring upper plate 3 is tightly attached to the powder concentrator shell 1 due to bolt tension, so that the possibility of powder leakage is prevented. In order to position the upper sealing ring plate 3 when the upper sealing ring plate 3 is arranged on the powder concentrator shell 1, a shell clamping groove 11 and an upper sealing ring plate clamping groove 31 are respectively formed on the opposite end surfaces of the powder concentrator shell 1 and the upper sealing ring plate 3, and the powder concentrator shell 1 and the upper sealing ring plate 3 are clamped together through the shell clamping groove 11 and the upper sealing ring plate clamping groove 31.
The seal ring outer ring 2 and the seal ring inner ring 4 are respectively arranged on the outer side and the inner side of the rotor blade 7, and the upper part of the rotor blade 7 stretches into the space between the seal ring outer ring 2 and the seal ring inner ring 4 and can rotate in the annular groove enclosed by the seal ring outer ring 2 and the seal ring inner ring 4. Gaps are arranged between the upper end surfaces of the rotor blades 7 and the sealing ring upper plate 3, and between the sealing ring outer ring 2 and the sealing ring inner ring 4 and the opposite end surfaces of the rotor blades 7, so that a first U-shaped sealing structure is formed; the upper end face of the rotor upper plate 6 is provided with a rotor upper plate groove 61, the width of the rotor upper plate groove 61 is slightly wider than that of the sealing ring inner ring 4, a small gap can be reserved between the rotor upper plate groove 61 and the sealing ring inner ring 4, meanwhile, interference between the powder concentrator rotor 8 and a sealing ring component cannot occur, the rotor upper plate groove 61 has a certain depth, the lower end of the sealing ring inner ring 4 stretches into the rotor upper plate groove 61 for a certain distance, gaps are reserved between the lower end of the sealing ring inner ring 4 and the groove wall and the groove bottom of the rotor upper plate groove 61, a second U-shaped sealing structure is formed, the position higher than the rotor upper plate 6 is completely blocked by the sealing ring inner ring 4, coarse particles cannot directly enter a finished product area from the position, most of coarse particles can collide the sealing ring inner ring 4, rebound enters a working area of a rotor blade 7, the sealing position is discharged by the rotor blade, and the probability of coarse particles can be effectively reduced. Two special U-shaped seals jointly form an impeller sealing structure of the powder selecting machine, the sealing mechanism has smaller sealing clearance, powder enters a finished product area 92 from a sorting area 91 and passes through a longer and narrower section, so that the powder is less likely to enter a sealing part, meanwhile, the special double U-shaped sealing structure enables the sealing part to have more corners, coarse particles can strike the inner wall of a sealing ring through the corners, a large amount of kinetic energy is lost, the direction of the coarse particles is changed, the coarse particles enter a working area of a rotor blade 7, and the coarse particles are beaten by the rotor blade 7 to be discharged from the sealing part.
Furthermore, the sealing ring outer ring 2 and the sealing ring inner ring 4 are not equal in height, and the lower end surface of the sealing ring outer ring 2 is higher than the lower end surface of the sealing ring inner ring 4. The powder concentrator rotor 8 and the sealing ring grooves with unequal heights form a special centrifugal fan structure, and gas in the ring grooves moves from radial direction to the sealing ring outer ring 2 due to centrifugal force. Furthermore, the lower end face of the outer ring 2 of the sealing ring is higher than the upper end face of the upper plate 6 of the rotor, so that the gap between the outer ring 2 of the sealing ring and the upper plate 6 of the rotor is large, the structure has a larger exhaust area, and the trend of the gas moving outwards from the inside of the ring groove is aggravated. Therefore, the air inlet quantity of the sealing part can be increased, according to the principle of a centrifugal fan, air flow enters from the clearance part between the inner ring 4 of the sealing ring and the upper plate 6 of the rotor, the smaller clearance enables the air flow speed entering from the clearance part to be increased, coarse particles reaching the clearance part can be blown open, the coarse particles can not pass through the clearance part, and therefore the probability of coarse particles running is effectively reduced. In addition, the outer ring 2 is higher than the upper rotor plate 6, so that a certain space is reserved between the end face of the outer ring 2 and the upper rotor plate 6, and coarse particles in the sealing structure are conveniently discharged out of the rotor blade 6.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a vertical mill selection powder machine impeller seal structure, includes selection powder machine casing, rotor upper plate and is in fixed connection's sealing ring part on the selection powder machine casing, its characterized in that:
the sealing ring component comprises a sealing ring upper plate fixedly connected to the powder concentrator shell, and a sealing ring outer ring and a sealing ring inner ring which are fixedly connected to the lower end face of the sealing ring upper plate;
the outer ring and the inner ring of the sealing ring are respectively arranged at the outer side and the inner side of the rotor blade, and gaps are respectively arranged between the outer ring and the inner ring of the sealing ring and the rotor blade;
the upper end face of the rotor upper plate is provided with a rotor upper plate groove, and the lower end of the inner ring of the sealing ring is arranged in the rotor upper plate groove and a gap is arranged between the lower end of the inner ring of the sealing ring and the rotor upper plate groove.
2. The impeller sealing structure of the vertical mill powder concentrator according to claim 1, wherein: the lower end face of the outer ring of the sealing ring is higher than the lower end face of the inner ring of the sealing ring.
3. The impeller sealing structure of the vertical mill powder concentrator according to claim 1, wherein: the lower end face of the outer ring of the sealing ring is higher than the upper end face of the upper plate of the rotor.
4. The impeller sealing structure of the vertical mill powder concentrator according to claim 1, wherein: the sealing ring upper plate is fixedly connected to the powder concentrator shell through bolts.
5. The impeller sealing structure of the vertical mill powder concentrator of claim 4, wherein: the end faces of the powder selecting machine shell, which are opposite to the sealing ring upper plate, are respectively provided with a shell clamping groove and a sealing ring upper plate clamping groove, and the powder selecting machine shell and the sealing ring upper plate are clamped together through the shell clamping grooves and the sealing ring upper plate clamping grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321466679.4U CN220060513U (en) | 2023-06-09 | 2023-06-09 | Impeller sealing structure of vertical mill powder concentrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321466679.4U CN220060513U (en) | 2023-06-09 | 2023-06-09 | Impeller sealing structure of vertical mill powder concentrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220060513U true CN220060513U (en) | 2023-11-21 |
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ID=88785589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321466679.4U Active CN220060513U (en) | 2023-06-09 | 2023-06-09 | Impeller sealing structure of vertical mill powder concentrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220060513U (en) |
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2023
- 2023-06-09 CN CN202321466679.4U patent/CN220060513U/en active Active
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