CN110319124A - A kind of KZL type bearing support device resisting radial and axial combined stress - Google Patents
A kind of KZL type bearing support device resisting radial and axial combined stress Download PDFInfo
- Publication number
- CN110319124A CN110319124A CN201910648766.3A CN201910648766A CN110319124A CN 110319124 A CN110319124 A CN 110319124A CN 201910648766 A CN201910648766 A CN 201910648766A CN 110319124 A CN110319124 A CN 110319124A
- Authority
- CN
- China
- Prior art keywords
- bearing
- ball bearing
- agitating shaft
- axle sleeve
- kzl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000007906 compression Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/10—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in stationary drums or troughs, provided with kneading or mixing appliances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/061—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing mounting a plurality of bearings side by side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2320/00—Apparatus used in separating or mixing
Abstract
The invention discloses a kind of KZL type bearing support devices for resisting radial and axial combined stress, it is the novel bearing base device of a kind of prevention agitating shaft play and bending deformation, extension bearing service life, which includes sealing ring (1), bearing block II (2), double-row self-aligning roller bearing (3), retaining ring (4), thrust ball bearing (5), ball bearing housing (6), gland (7), axle sleeve (8), pressing plate (9).Thrust ball bearing (5) is constituted eliminate double-row self-aligning roller bearing (3) axial force and agitating shaft play, warp architecture together with bearing block II (2) and agitating shaft installation cooperation respectively by ball bearing housing (6) and axle sleeve (8).The equally applicable other similar working condition of the device.
Description
Technical field
The present invention relates to one kind to cause granular horizontal dry, wet granulator for granular material by stirring tooth on agitating shaft
Equipment, to guarantee that axial float does not occur for agitating shaft during pelletizer conveys material, under normal conditions by axial force one end
The axial force that bearing inner ring and agitating shaft shoulder are withstood, outer race are withstood by bearing block inner convex platform and gland, which holds
The axial force that base device can will act on bearing inner ring is undertaken with one group of thrust ball bearing component, guarantee agitating shaft be granulated and it is defeated
Tension state is in during material, bearing is solely subjected to radial force.
Background technique
The agitating shaft for being widely used in the fields such as metallurgy, chemical industry, chemical fertilizer, ore, electric power is granulated conveying equipment --- and it is horizontal to make
Grain machine is that granular material is arranged to stir between tooth and inner tube wall to be spiral helicine on pelletizer agitating shaft by addition granulation water
Mutually be twisted into wet granular shape, pelletizer conveying cylinder be it is jacket structured have a steam tracing, cylinder is with 3.2~3.5 meters, diameter 0.5
The various models such as~1.2 meters are granulated water and cause granular material after being reached again from discharge port after graininess by spraying in cylinder
The drying equipment in face is dried.The bearing holder device at agitating shaft both ends still suffers from material other than support agitating shaft operating
Opposite force, that is, axial force that material forms agitating shaft in transmission process, the opposite force all act on charging end bearing block axis
It holds in inner ring, and an axial compression stress is formed to agitating shaft.
It is combined using traditional bearing block always at the pelletizer equipment both ends.Convey material process caused by opposite force by
Feed end bearing inner ring is born, and outer race is fixed in bearing block, and such bearing inner and outer rings cut bearing ball generation
It cuts, compression is generated to agitating shaft.Under actual condition, pelletizer is using just occurring the damage of a lot of bearing balls, be granulated after half a year
The accidents such as machine vibration is big, stirs tooth and inner cylinder wall friction or blocks, it has to which stop production repairing, has seriously affected the normal fortune of production line
Row, makes enterprise bring great loss.
Traditional bearing holder device working principle: agitating shaft both ends are respectively equipped with the bearing block dress being mounted in barrel body end cover
It sets, bearing can only be used to bear radial force non-axial force, and the working condition of pelletizer agitating shaft is rotation plus conveying material, axis
Radial force will not only be born by, which holding, still suffers from biggish axial force, both agitating shaft flexible rotating not play, it is characterised in that: bearing
Double row tapered roller bearing outer ring in base device is coupled with bearing block, inner ring is coupled with stirring spindle nose, gland top
Firmly outer race is fixed by bolts on bearing block, to meet the requirement that agitating shaft rotates again not play.
The disadvantage is that:
One, the information such as bearing service life is short, granulation machine vibration is big are fed back through analyzing according to scene, damage is mainly fed
The bearing at end, which is the axial force born the radial force that agitating shaft rotates and bear conveying material generation again, and bearing
Outer ring is fixed on bearing block, and shearing certainly will be generated to ball, is blocked, causes bearing service life short, live frequent shutdown is more
Change bearing.
Two, all responsive to axial force are in axial compression shape in feed end bearing inner ring always in agitating shaft operation process
State, the distance between two bearing blocks generally will do quiet, dynamic balance running before 3.5 meters, agitating shaft factory, eccentric after compression
Away from tending to increasing, cause that vibrates during equipment operation to continue to increase.
Three, bearings at both ends holder structure is identical but stress condition is different, feeds end bearing by radial and axial combined stress, out
Expect end bearing only by radial force, necessarily cause feed the end bearing short time in damage, irrational mix and configuration be cause into
Expect end bearing premature breakdown and stirs the principal element of shaft distortion pelletizer vibration.
Four, agitating shaft during rotation, is in axial compression state, center of gravity eccentricity under the action of the centrifugal force always
It continues to increase, tends to bending deformation, increase vibration equipment amplitude, until plant bottom case fixing bolt loosens or occurs accident,
All there is security risk to equipment and operator in scene.
Five, tooth and cylinder inboard wall gap very little are stirred on agitating shaft, stirs tooth after bending shaft and causes barrel to grind with wall friction
Damage is worn out, can not be granulated.
Six, double row tapered roller bearing bears biggish radial and axial power simultaneously, and service life is short.Field operation condition
Compare badly, bearings at both ends must be replaced once one of bearing damage, the bearing under replacing can only be scrapped.
Therefore, it is necessary to develop a kind of reasonable structural arrangement, eliminate hidden trouble of equipment, long service life, long-lived axis
Bearing device.
Summary of the invention
The present invention is directed to overcoming defect existing for above-mentioned bearing holder device, provides and a kind of resist radial and axial combined stress
KZL type bearing support device, the device efficiently solve pelletizer equipment operational process vibration problem, extend bearing and use the longevity
Life is suitable for various working spaces, and stability is strong, maintenance convenient for safeguarding, durable, can equally be well applied to other similar set
It is standby.
The technical scheme adopted by the invention is as follows:
A kind of KZL type bearing support device resisting radial and axial combined stress, comprising: bearing block II, self-aligning roller bearing,
Sealing ring, retaining ring, thrust ball bearing, ball bearing housing, gland, axle sleeve, pressing plate.It is characterized by: ball bearing housing passes through retaining ring top
Firmly double-row self-aligning roller bearing outer ring, one thrust ball bearing of inside installation, is fixed on bearing block II with gland, is constituted together
Double-row self-aligning roller bearing is protected not influenced structure by axial force；Thrust ball bearing is mounted on agitating shaft spindle nose simultaneously by axle sleeve
It is fixed with pressing plate, constitutes and offset the opposite force structure that material transportation process generates；Bearing dress after adding a thrust ball bearing
It sets structure and completely eliminates axial force suffered by double-row self-aligning roller bearing and agitating shaft compression situation.
Thrust ball bearing of the present invention, ball bearing housing composition eliminate between double-row self-aligning roller bearing inner and outer rings in opposite directions to by
Power situation.
The present invention using thrust ball bearing by the axial force of agitating shaft by buckling at drawing, begin in operating conveying process agitating shaft
It is in tension state eventually.
Self-aligning roller bearing of the present invention only carries radial force.
The present invention prevents the working principle of agitating shaft play and vibration and its designing points are:
1, thrust ball bearing component is added in discharge end bearing holder device, eliminates both ends double-row self-aligning roller bearing by axial direction
The effect of power；
2, the reaction force that conveying material generates is undertaken by thrust ball bearing, and agitating shaft compression becomes tension state, is rotated
Agitating shaft eccentricity tends to reduce in the process；
3, the present invention prevents agitating shaft play and vibration transfer route are as follows:
Agitating shaft-double-row self-aligning roller bearing (bearing radial force)-bearing block II
Agitating shaft-axle sleeve-thrust ball bearing (bearing axial force)-ball bearing housing-bearing block II
The present invention has the advantages that
One, after adding thrust ball bearing, axial force is acted on bearing block II by thrust ball bearing seat, is eliminated to double
The active force of column self-aligning roller bearing inner ring, bearing are solely subjected to radial force, greatly improve the service life of bearing；
Two, after adding thrust ball bearing, change agitating shaft axially loaded state, tension is become by compression, with agitating shaft
Its eccentricity of constantly operating tend to center of gravity, amplitude is smaller and smaller, and agitating shaft operating is more flexible, scrapes wall phenomenon without stirring tooth；
Three, bearing only maintenance according to plan, with after new construction, there is no the improper damaged conditions of bearing, reduce
Equipment operating cost reduces shutdown maintenance number；
Four, due to the change of agitating shaft stress, tooth friction inner cylinder phenomenon is stirred after having prevented agitating shaft bending deformation；
Detailed description of the invention
Fig. 1 the schematic diagram of the section structure of the present invention
Fig. 2 is Fig. 1 partial enlargement
Marked in the figure: 1- sealing ring, 2- bearing block II, 3- double-row self-aligning roller bearing, 4- retaining ring, 5- thrust ball bearing,
6- ball bearing housing, 7- gland, 8- axle sleeve, 9- pressing plate
Fig. 3 is compared with the prior art the schematic diagram of the section structure
Fig. 4 is Fig. 3 partial enlargement
Marked in the figure: 1- sealing ring, 2- bearing block I, 3- double-row self-aligning roller bearing, 4- bearing cap
Specific embodiment
A kind of KZL type bearing support device resisting radial and axial combined stress, comprising: sealing ring 1, bearing block II2, biserial
Self-aligning roller bearing 3, retaining ring 4, thrust ball bearing 5, ball bearing housing 6, gland 7, axle sleeve 8, pressing plate 9.
Ball bearing housing 6 constitutes agitating shaft with 8 pressing plate 9 of axle sleeve by thrust ball bearing 5 together to be prevented from by buckling tension state
Only its vibration, play；Thrust ball bearing 5 constitutes elimination by 7 pressing plate of ball bearing housing 6 and bearing block II2 gland, 9 axle sleeve 8 together
Double-row self-aligning roller bearing 3 is by axial force state；
The KZL type bearing support device efficiently solves horizontal pelletizer equipment stirring shaft distortion, vibrates, stirs odontotripsis cylinder
The problems such as wall and the short frequent halt production replacement bearing of bearing life or agitating shaft, KZL type bearing support device has broken traditional structure
Form, long service life, without especially maintenance, the KZL type bearing support device developed at present uses non-just without an example bearing for many years
Often damage and agitating shaft deformation accident occur, securely and reliably.
3 inner ring of double-row self-aligning roller bearing of the present invention is coupled with agitating shaft spindle nose to be rotated together with agitating shaft, outer ring
It is coupled with bearing block II 2 fixed.5 lower ring plate of thrust ball bearing and ball bearing housing 6, which are coupled, has one with axle sleeve 8
Fixed gap is fixed.5 upper ring plate of thrust ball bearing is coupled with axle sleeve 8 and is fixed with pressing plate 9 with agitating shaft, with agitating shaft
It rotates together.Ball bearing housing 6 is fixed with bearing block II2 with bolt together with gland 7.Sealing ring 1 is mounted on bearing block II2 sealing
In groove, internal diameter is installed together with agitating shaft.When assembly, 1. sealing ring 1 is mounted in bearing block II2 groove, then installs
On agitating shaft and expose the position for installing bearing；2. 3 inner ring of double-row self-aligning roller bearing is coupled with spindle nose, axle sleeve 8 with
Spindle nose is coupled；3. bearing block II2 and 3 outer ring of double-row self-aligning roller bearing are coupled and install retaining ring 4 again；4. ball bearing
Seat 6 is coupled with 5 lower ring plate of thrust ball bearing, then is installed with bearing block II2；5. 5 retainer of thrust ball bearing is placed on down
Upper ring plate is mounted on retainer pearl again after centering on ring flat-plate and is coupled with axle sleeve 8；6. pushing down upper ring plate with pressing plate 9
Blending bolt is fixed on agitating shaft spindle nose；7. gland 7 is fixed by bolts on bearing block II2 together with ball bearing housing 6.
Installing and dismounting process simply, conveniently, only need to carry out maintenance according to plan, be suitble to various site environments.
Claims (3)
1. a kind of KZL type bearing support device for resisting radial and axial combined stress, including it is sealing ring (1), bearing block II (2), double
Column self-aligning roller bearing (3), retaining ring (4), thrust ball bearing (5), ball bearing housing (6), gland (7), axle sleeve (8), pressing plate (9),
It is characterized by: increase thrust ball bearing (5) newly in discharging end bearing block becomes with ball bearing housing (6) axle sleeve (8) pressing plate (9) group
Bear all axial force structures.
2. a kind of KZL type bearing support device for resisting radial and axial combined stress according to claim 1, feature exist
In: thrust ball bearing (5) lower ring plate is to be fitted close to be fixed on together on bearing block II (2) with ball bearing housing (6), with axle sleeve
(8) there is certain gap.
3. a kind of KZL type bearing support device for resisting radial and axial combined stress according to claim 1, feature exist
In: thrust ball bearing (5) upper ring plate is fitted close and is fixed on spindle nose with pressing plate (9) with axle sleeve (8) to be turned with agitating shaft
It is dynamic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648766.3A CN110319124A (en) | 2019-07-12 | 2019-07-12 | A kind of KZL type bearing support device resisting radial and axial combined stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648766.3A CN110319124A (en) | 2019-07-12 | 2019-07-12 | A kind of KZL type bearing support device resisting radial and axial combined stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110319124A true CN110319124A (en) | 2019-10-11 |
Family
ID=68123974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910648766.3A Pending CN110319124A (en) | 2019-07-12 | 2019-07-12 | A kind of KZL type bearing support device resisting radial and axial combined stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110319124A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201215779Y (en) * | 2008-06-23 | 2009-04-01 | 南京电气（集团）有限责任公司 | Bearing seat for outdoor high-voltage isolating switch |
| CN202327102U (en) * | 2011-10-01 | 2012-07-11 | 徐州天地重型机械制造有限公司 | Sand sorting machine shaft end with novel sealing device |
| CN202639355U (en) * | 2012-06-12 | 2013-01-02 | 河南奔马股份有限公司 | Strong running center |
| CN203061147U (en) * | 2012-11-05 | 2013-07-17 | 鹤壁市通用机械电气有限公司 | Ceramsite sand granulator |
| CN203389593U (en) * | 2013-08-13 | 2014-01-15 | 唐山贺祥机电股份有限公司 | Novel stirrer output shaft |
| CN205075152U (en) * | 2015-09-21 | 2016-03-09 | 信阳雄狮装备科技股份有限公司 | Vacuum extruder main shaft system assembly |
| CN205618560U (en) * | 2016-04-26 | 2016-10-05 | 长沙矿冶研究院有限责任公司 | Large -scale vertical spiral stirring mill's bearing transmission system |
| CN107269712A (en) * | 2017-07-26 | 2017-10-20 | 广西柳航墙材工业有限公司 | A kind of sealing structure of high-efficiency helical vacuum extruding form machine |
| CN208078819U (en) * | 2018-04-24 | 2018-11-09 | 光达传动股份有限公司 | A kind of stirring special reduction gear |
| CN210484424U (en) * | 2019-07-12 | 2020-05-08 | 青岛德固特节能装备股份有限公司 | KZL type bearing seat device capable of resisting radial and axial combined stress |
-
2019
- 2019-07-12 CN CN201910648766.3A patent/CN110319124A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201215779Y (en) * | 2008-06-23 | 2009-04-01 | 南京电气（集团）有限责任公司 | Bearing seat for outdoor high-voltage isolating switch |
| CN202327102U (en) * | 2011-10-01 | 2012-07-11 | 徐州天地重型机械制造有限公司 | Sand sorting machine shaft end with novel sealing device |
| CN202639355U (en) * | 2012-06-12 | 2013-01-02 | 河南奔马股份有限公司 | Strong running center |
| CN203061147U (en) * | 2012-11-05 | 2013-07-17 | 鹤壁市通用机械电气有限公司 | Ceramsite sand granulator |
| CN203389593U (en) * | 2013-08-13 | 2014-01-15 | 唐山贺祥机电股份有限公司 | Novel stirrer output shaft |
| CN205075152U (en) * | 2015-09-21 | 2016-03-09 | 信阳雄狮装备科技股份有限公司 | Vacuum extruder main shaft system assembly |
| CN205618560U (en) * | 2016-04-26 | 2016-10-05 | 长沙矿冶研究院有限责任公司 | Large -scale vertical spiral stirring mill's bearing transmission system |
| CN107269712A (en) * | 2017-07-26 | 2017-10-20 | 广西柳航墙材工业有限公司 | A kind of sealing structure of high-efficiency helical vacuum extruding form machine |
| CN208078819U (en) * | 2018-04-24 | 2018-11-09 | 光达传动股份有限公司 | A kind of stirring special reduction gear |
| CN210484424U (en) * | 2019-07-12 | 2020-05-08 | 青岛德固特节能装备股份有限公司 | KZL type bearing seat device capable of resisting radial and axial combined stress |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101155988A (en) | Pillow block system with tapered roller bearings | |
| CN102343296A (en) | Grinding roller sealing device for vertical roller mill | |
| CN110319124A (en) | A kind of KZL type bearing support device resisting radial and axial combined stress | |
| US6234414B1 (en) | Apparatus and method for sealing shafts | |
| CN109718939B (en) | Solid fuel supply pipe, crushing device and solid fuel supply method | |
| CN210484424U (en) | KZL type bearing seat device capable of resisting radial and axial combined stress | |
| EP0437047B1 (en) | Trunnion bearing dust seal | |
| CN210410875U (en) | Cone crusher with high stability transmission system | |
| CN1514917A (en) | Device for float mounting sealed housing | |
| CN114060384B (en) | Bolt sealing structure of rod mill barrel and rod mill | |
| KR100744608B1 (en) | Guide roller for continuous ship unloader | |
| CN114570244A (en) | A drum type humidification compounding device for sintering production is with dust removal ash | |
| CN213478667U (en) | Horizontal centrifugal pump with wear-resisting pump cover | |
| US4389202A (en) | Shearing pin moment of rotation limiting arrangement for two constructional units that are rotatable relative to one another | |
| CN212121663U (en) | Metal powder ball mill | |
| CN220328845U (en) | Hammer shaft assembly of crusher | |
| CN213801604U (en) | Unloader drive mechanism | |
| CN218953856U (en) | Bearing positioning and cooling structure | |
| CN217576915U (en) | Radial supporting device for intermediate shaft of vertical screw conveyor | |
| CN211778036U (en) | Middle open type centrifugal pump | |
| CN220282564U (en) | Rotary shaft sealing structure of U-shaped screw conveyor | |
| CN216172599U (en) | Novel medium-speed roller type vertical grinding roller | |
| CN216605460U (en) | Grinding roller device of HP coal mill | |
| CN212975330U (en) | Crushing device for dry-method sand making machine | |
| CN202460736U (en) | Grinding roller sealing device for vertical roller mill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |