CN109107696A - A kind of Symmetric Composite formula spiral shape ore grinding cylinder and its design method - Google Patents
A kind of Symmetric Composite formula spiral shape ore grinding cylinder and its design method Download PDFInfo
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- CN109107696A CN109107696A CN201811196909.3A CN201811196909A CN109107696A CN 109107696 A CN109107696 A CN 109107696A CN 201811196909 A CN201811196909 A CN 201811196909A CN 109107696 A CN109107696 A CN 109107696A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
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Abstract
The present invention relates to a kind of Symmetric Composite formula spiral shape ore grinding cylinder and its design methods, feeding pipes, discharging trunnion and the transmission gear being connected to including cylinder, respectively with the barrel end, it is set with organic frame left support and rack right support on the middle part outer wall of the feeding pipes and discharging trunnion, the cylinder is composed of the docking of several eccentric cylinders；The eccentric cylinder includes inner cylinder, outer cylinder, and there are eccentricities between the axis of the inner cylinder and the axis of outer cylinder.The present invention can obtain higher relative velocity and bigger comminution power between material in grinding process and mill are situated between, and have higher grinding efficiency；Simultaneously because the difficulty of the manufacturing, the transport and dismounting maintenance of large-scale combined ore grinding cylinder can be reduced using the composite structure of segmented.
Description
Technical field
The present invention relates to mining machinery machinery equipment technical field more particularly to a kind of Symmetric Composite formula spiral shape ore grinding cylinders
Body and its design method.
Background technique
Ball mill is widely used in the industries such as metal and nonmetal ore-dressing, cement plant, power plant, ceramics, is mine mineral powder
The important equipment of one kind of mill.The working principle of ball mill is when cylinder is rotated around horizontal axis by defined revolving speed, in cylinder
Material and mill be situated between under the action of centrifugal force, frictional force, rise to certain altitude with cylinder interior lining panel, be then detached from liner plate.Object
Material be by mill be situated between generated during freely falling or leaving impact force, frictional force and mill Jie between, between material, material
Relative motion between mill Jie squeezes material, collides, shelling mill and crush.Material is with mill Jie's in ball mill barrel
Between relative velocity it is higher, material is higher, also more abundant by the speed of stripping mill, thus the effect ground is better.Often at present
The ball mill barrel seen mostly uses greatly single axis, prismatic shapes, the cylindrical tube with cavity structure, and the revolution of cylinder
Axis is overlapped with its geometrical axis.The grinding mill barrel of this structure in grinding process, will appear inside ore grinding area one compared with
Most " dead zone ", i.e., so-called storeroom relative velocity is smaller, relatively even speed be zero region, the object in the region
Material is difficult to be ground." dead zone " area is bigger, and the ore grinding of grinding machine is lower.
Patent related with this technology mainly has: a kind of ball mill barrel and ball mill and manufacturing method with the cylinder
(ZL 201510607347.7), disclose a kind of regular hexagon of single axis, the cylinder of octagon or dodecagon and
Ore grinding chamber structure.The cylinder of this structure is relative to cylindrical tube in the range that rotates a circle, and inner barrel material is circumferentially
The velocity variations in direction are larger, but in varying cross-section in the axial direction, the speed of mill Jie, material on same angle position
Size and Orientation is identical；And " dead zone " area existing for this regular polygon structure lumen type inside is still larger.Therefore, using this
The cavity structure of kind regular polygon shape is difficult to significantly improve grinding efficiency.
A kind of cylinder lumen wall is non-cylindrical ball mill (ZL 201510022261.8), discloses a kind of round cut
The ball mill of the segmented combined barrel structure of face and oval cross section composition.In the middle position of grinding mill barrel, have one section along axis
The circular cross-section cylinder of line direction variable diameter；There are two sections or more respectively at its both ends, and the mutually perpendicular elliptic cross-section of long axis
Cylinder section is spliced, in each cylinder section inner wall lining rubber.The cylindrical tube of relatively traditional single axis, material and mill are situated between
Bigger difference can be obtained in the rotary course of the grinding mill barrel of this multi-section combined structure, at each cylinder end
Material on interface and mill are situated between and can also obtain different speed differences, thus material can by more strong extruding, grind
Effect.But because of grinding mill barrel limited diameter, the long axis of each section of elliptical cylinder is close with minor axis dimension, the speed difference that material and mill are situated between
And it is limited, thus, it is also difficult to significantly improve grinding efficiency with this segmented, the combined barrel structure of on-circular cross-section.
Centering type agitating ball mill (ZL 201510194133.1), discloses a kind of grinding mill barrel geometric center lines and returns
Turning center line, there are an eccentric structures, and the axis of rotation of cylinder and main-shaft axis are coaxial.In grinding process, material and mill are situated between
It revolves with cylinder around main shaft, relatively traditional single cylindrical tube grinding machine, the grinding machine of this eccentric structure can be greatly decreased
" dead zone " area in cylinder.Further, since being mounted on several blenders on main shaft, it can be situated between to the material in cylinder with mill and stir
It mixes, thus grinding efficiency can be significantly improved.But it, will because of the centrifugal load that this eccentric structure cylinder generates in turning course
The service life of spring bearing is influenced, this structure is more adapted to small-sized grinding machine；Because the blender on main shaft will reduce filling out for cylinder
Rate is filled, grinding machine efficiency is also influenced；In addition, the replacement of blender, maintenance difficulties are big.
Based on the above considerations, the present invention devises a kind of Symmetric Composite formula spiral shape ore grinding cylinder and its design side
The advantages that method, existing conventional mill structure is simple, performance is stable and maintenance is easy to use, and being capable of more apparent promotion grinding efficiency
Novel grinding machine.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of Symmetric Composite formula spiral shape ore grinding cylinder and
Its design method.
In order to achieve the object of the present invention, the technical solution adopted by the present invention are as follows:
The invention discloses a kind of Symmetric Composite formula spiral shape ore grinding cylinder, including cylinder, respectively with the barrel end
It is covered respectively on feeding pipes, discharging trunnion and the transmission gear of connection, the feeding pipes and the middle part outer wall of discharging trunnion
Equipped with rack left support and rack right support, the cylinder is composed of the docking of several eccentric cylinders；The eccentric cylinder includes
Inner cylinder, outer cylinder, there are eccentricities between the axis of the inner cylinder and the axis of outer cylinder.
The cross section of the outer cylinder of several eccentric cylinders is the circle of equal radiuses, and the outer cylinder axis is rotating shaft
Line；The axis of the inner cylinder of several eccentric cylinders is distributed about the axis of rotation axial symmetry constitutes spatially spiral axis.
The cross section showing ellipsoidal structure of the inner cylinder or ellipse polygonized structure or the ellipse polygon knot of arc-straight section
Structure.
Shape forms an angle between the long axis of the inner cylinder cross section of the adjacent eccentric cylinder.
The eccentric cylinder is n, and the eccentric cylinder is with sequence from left to right, the long axis of the inner cylinder cross section of eccentric cylinder
Between angle successively homodromic deflection 360/n degree.
The eccentric cylinder is distinguished with sequence from left to right, the left end of leftmost side eccentric cylinder, the right end of rightmost side eccentric cylinder
Pass through flanged joint with the right end of the feeding pipes, the left end for the trunnion that discharges.
A method of design Symmetric Composite formula spiral shape ore grinding cylinder, comprising the following steps:
The first step measures structure size, number of moving part, charging grain class distribution, mill Jie proportion, filling rate, ore grinding of cylinder
Threshold velocity amplitude, calibration mill Jie-liner plate, mill Jie-mill Jie, material-liner plate, material-mill are situated between, are between material-material extensive
Complex coefficient, dynamic friction coefficient and static friction coefficient；
Second step, the method combined using MATLAB, ADAMS, EDEM simulate the grinding process of cylinder；
Third step measures best eccentricity, eccentric cylinder inner prop between the inner cylinder axis of eccentric cylinder and outer cylinder axis
The best helical axis that optimal cross section shape, the quantity of eccentric cylinder and each eccentric cylinder axis in face are constituted along axis of rotation direction
Line.Further include verification step: separately designing Symmetric Composite formula spiral shape ore grinding cylinder and conventional bead mill structure cylinder, to use
Identical technological parameter and running parameter carry out grinding process simulation analysis and experimental analysis respectively；By comparing its inside
Relative velocity, tangential friction force and normal direction extruding force and the inner barrel between material and mill Jie are in the object of lower-speed state
Material and mill betweenness purpose statistical result, verify reasonability of the invention.
The beneficial effects of the present invention are:
1. the present invention is in irregular shape within the scope of one week by the cross section of eccentric cylinder inner cylinder, can make material with
Mill be situated between successively by lifting zone, let out motion state when settling in an area, leaving area and velocity vector is more diversified, to obtain more
Big speed difference；Meanwhile because the radius within the scope of one week changes, moreover it is possible to the radial force generating period for making material and mill be situated between
Property variation, enhance to material and mill be situated between disturbance, to improve grinding efficiency；
2. the present invention by the axis of the inner cylinder axis of eccentric cylinder and combined barrel there are certain eccentricity, therefore it is each inclined
Heart cylinder drives material and mill to be situated between and revolves around axis of rotation, and " dead zone " area (is in the material of lower-speed state in one side cylinder
With mill betweenness amount) reduction and eccentricity it is proportional, material can be squeezed radially by bigger normal pressure in another aspect cylinder
Pressure effect, so as to enhance abrasive action；
3. between the inner cylinder axis that the present invention passes through adjacent eccentric cylinder, there are eccentricity, the long axis of each inner cylinder cross section
Along the circumferential direction there are differential seat angles again, therefore different speed will occur in the material near adjacent eccentric cylinder interface and mill Jie
Vector, so as to greatly improve the grinding effect for nearby grinding and being situated between to material on interface；
4. the present invention is by the same angle of successively homodromic deflection of the cross section long axis of adjacent eccentric cylinder inner cylinder, if will
The deflection direction of adjacent eccentric cylinder inner cylinder cross section long axis and the direction of rotation of combined barrel carry out Proper Match, can accelerate
Material movement speed in the axial direction, so as to which the overground ratio of material is greatly decreased；
5. the present invention uses n sections of eccentric cylinders, inner cylinder axis is circumferentially evenly arranged as equiangularly spaced, makes combined type
Irregular barrel becomes the axially symmetric structure about axis of rotation, and the composite profile ore grinding cylinder of formation can both realize static balance,
Will not occur unbalance dynamic in rotary course because of eccentric tube structure, because of the use without influencing combined barrel spring bearing
Service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of Symmetric Composite formula spiral shape ore grinding cylinder；
Fig. 2 is feeding pipes flange arrangement schematic diagram；
Fig. 3 is eccentric cylinder inner cylinder cross-sectional structure figure；
Fig. 4 (a) is several eccentric cylinder inner cylinder combining structure schematic diagrams；
Fig. 4 (b) is another viewing angle constructions schematic diagram of Fig. 4 (a)；
Fig. 5 is eccentric cylinder Promotion From Within area material speed analysis chart；
Fig. 6 is eccentricity-kinetic energy enhancing rate curve that material and mill are situated between in eccentric cylinder；
Fig. 7 is eccentric cylinder under the conditions of different eccentricities, the when m- relative velocity curve that material and mill are situated between；
Fig. 8 (a) is the when m- tangential friction force distribution curve of material in eccentric cylinder body；
Fig. 8 (b) is the when m- normal direction extruding force distribution curve of material in eccentric cylinder body；
The m- material in lower-speed state and mill Jie's number curve when Fig. 9 is；
Figure 10 (a) is that eccentric cylinder quantity is 2, when its adjacent axis deflection angle is 180 °, and material and mill are situated between in axis side
To when m- relative velocity curve；
Figure 10 (b) is that eccentric cylinder quantity is 3, when its adjacent axis deflection angle is 120 °, and material and mill are situated between in axis side
To when m- relative velocity curve；
Figure 10 (c) is that eccentric cylinder quantity is 4, when its adjacent axis deflection angle is 90 °, and material and mill are situated between in axis direction
When m- relative velocity curve；
Figure 10 (d) is that eccentric cylinder quantity is 6, when its adjacent axis deflection angle is 60 °, and material and mill are situated between in axis direction
When m- relative velocity curve；
Figure 10 (e) is conventional mill tube structure, and material and mill are situated between in the when m- relative velocity curve of axis direction.
In figure, 1 feeding pipes, 2 rack left supports, 3 cylinders, 31 eccentric cylinders, 32 inner cylinders, 33 outer cylinders, 4 driving cogs
Wheel, 5 rack right supports, 6 discharging trunnions, 7 axiss of rotation, 8 spatially spiral axis, 11 connecting holes.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
Referring to Fig. 1-Figure 10.
The invention discloses a kind of Symmetric Composite formula spiral shape ore grinding cylinder, including cylinder 3, respectively with 3 end of cylinder
On the middle part outer wall of feeding pipes 1, discharging trunnion 6 and the transmission gear 4 of portion's connection, the feeding pipes 1 and discharging trunnion 7
It is set with organic frame left support 2 and rack right support 5, the cylinder 3 is composed of the docking of several eccentric cylinders 31；It is described
Eccentric cylinder 31 includes inner cylinder 32, outer cylinder 33, there is bias between the axis of the inner cylinder 32 and the axis of outer cylinder 33
Away from by the way that there are eccentricity, each eccentric cylinder drives material and mill to be situated between and revolves around axis of rotation, and " dead zone " area is in cylinder
The material of lower-speed state and the reduction of mill betweenness amount and eccentricity are proportional, so as to enhance abrasive action；In EDEM environment
In, conventional bead mill structure cylinder and the interior material and mill for being in lower-speed state of single eccentric cylinder 31 in grinding process are counted respectively
Betweenness amount, and in this, as the dead zone area counted in single eccentric cylinder 31, conventional bead mill structure cylinder and single eccentric cylinder
The m- material in lower-speed state and mill Jie's number curve when in 31 are as shown in figure 8, it is found that within effective ore grinding time, tradition
Material of the speed lower than 0.3m/s and mill Jie's number curve in ball mill structure cylinder, speed is low in single eccentric cylinder body completely
On the material and mill Jie's number curve of 0.3m/s；Within the ore grinding time of 2s-4s, speed in conventional bead mill structure cylinder
Material and mill betweenness amount lower than 0.3m/s are being 140-170, and speed is lower than the material of 0.3m/s in single eccentric cylinder body
It is 115-130 with mill betweenness amount；Within the ore grinding time of 6s-8s, speed is lower than 0.3m/s in conventional bead mill structure cylinder
Material and mill betweenness amount for 180-240, and in single eccentric cylinder body material of the speed lower than 0.3m/s and grind betweenness amount
It is basically stable at 170；Therefore, it is intracorporal " dead to be significantly less than conventional bead mill structure cylinder for " dead zone " area in eccentric cylinder 31
Area " area, to improve grinding efficiency；
Preferably, the eccentricity between the axis of the inner cylinder 32 and the axis of outer cylinder 33 is the 1.5- of material particular diameter
At 2 times, grinding efficiency is best；As shown in fig. 7, having obtained different bias by the size for changing single 31 eccentricity of eccentric cylinder
When m- relative velocity curve away under the conditions of；After cylinder 3 turns over 2s, when the materials inside for the eccentric cylinder that eccentricity is 20mm
Relative velocity between mill Jie is in 1m/s or more；Compared with conventional mill, between combined barrel materials inside and mill Jie
Relative velocity improve 8%~20%；Phase when eccentricity is increased to 30mm, between the material in eccentric cylinder 31 and mill Jie
1m/s~1.2m/s is reached to speed；But the phase when eccentricity is 40mm, between the material in single eccentric cylinder 31 and mill Jie
To speed relative to eccentricity be 30mm when relative velocity declined, but still be higher than conventional bead mill structure cylinder it is intracorporal
Relative velocity；Relative velocity decline when eccentricity is 50mm, between the material in single eccentric cylinder 31 and mill Jie；Occur with
The reason of upper situation is, when the eccentricity of single eccentric cylinder 31 increases, due to single eccentric cylinder 31 inner cylinder axis with
There are eccentricities for the axis of rotation of combined barrel, and single eccentric cylinder 31 is made to revolve around the axis of rotation 7 of cylinder 3, internal
The speed and centrifugal force of material and material increase, and the frictional force between material and mill Jie increases；But when eccentricity continues to increase
When big, the useful space in single eccentric cylinder 31 is reduced, so that the material of cylinder is accumulated, causes entire cylinder intracorporal
Relative velocity decline；Therefore, single 31 eccentricity of eccentric cylinder is object there are an optimum value, i.e., the eccentricity of single eccentric cylinder 31
1.5-2 times for expecting partial size.The material particular diameter that the present embodiment uses found for 20mm by analysis, the bias of single bias cylinder
When away from for 30mm-40mm, grinding efficiency is best；
By the way that there are eccentricity, material can be along diameter in cylinder between the axis of the inner cylinder 32 and the axis of outer cylinder 33
To the squeezing action by bigger normal pressure, so as to enhance abrasive action, if Fig. 8 (a) is material in single eccentric cylinder 31
When m- tangential friction force distribution curve, from the figure it can be found that after the ore grinding time reaching 2s, conventional bead mill structure
Tangential friction force variation range between the intracorporal material of cylinder and mill Jie is 0.125N~0.15N, mean value 0.13N；And it is inclined
Tangential friction force variation range between the intracorporal material of the single eccentric cylinder of the heart and mill Jie is 0.14N~0.18N, and mean value is
0.16N, accordingly it can be found that the tangential friction force between the material in single eccentric cylinder 31 and mill Jie is than conventional bead mill cylinder
Interior material and the tangential friction force that mill is situated between are big, it is hereby achieved that preferably tangential grinding efficiency；It is single bias in Fig. 8 (b)
The when m- normal direction extruding force distribution curve of material in cylinder, from the figure it can be found that after the ore grinding time reaching 2s, tradition
Normal direction extruding force between the intracorporal material of ball mill structure cylinder and mill Jie is 0.4N~0.6N, mean value 0.5N；And it is eccentric
Material in single eccentric cylinder 31 and mill be situated between normal direction extruding force be 0.5N~0.7N, mean value 0.6N, accordingly can be with
It was found that the normal direction extruding force between the material in single eccentric cylinder 31 and mill Jie is than material in conventional bead mill structure cylinder and mill
The normal direction extruding force of Jie is big, it is hereby achieved that preferably normal direction grinding efficiency.
The cross section of the outer cylinder 33 of several eccentric cylinders 31 is the circle of equal radiuses, and 33 axis of outer cylinder is back
Shaft axis 7；The axis of the inner cylinder 32 of several eccentric cylinders 31 is distributed about 7 axial symmetry of axis of rotation constitutes space spiral shell
Spin axis line 8,
As shown in Fig. 3 (a), the cross section showing ellipsoidal structure of the inner cylinder 32；The inner cylinder as shown in Fig. 3 (b)
32 cross section is in ellipse polygonized structure；The cross section of the inner cylinder 32 as shown in Fig. 3 (c) is ellipse polygon in arc-straight section
Shape structure, can make material and mill be situated between successively by lifting zone, let out motion state when settling in an area, leaving area and velocity vector more
Add diversification, to obtain bigger speed difference；Meanwhile because the radius within the scope of one week changes, moreover it is possible to make material and
The radial force generating period variation that mill is situated between, enhances the disturbance being situated between to material and mill, to improve grinding efficiency.
Shape forms an angle between the long axis 34 of the inner cylinder cross section of the adjacent eccentric cylinder 31, will be in adjacent eccentric cylinder
The deflection direction of cylinder cross section long axis and the direction of rotation of combined barrel carry out Proper Match, can accelerate material along axis side
To movement speed, so as to which the overground ratio of material is greatly decreased.
The eccentric cylinder 3 is n, the eccentric cylinder 3 with sequence from left to right, the inner cylinder cross section of eccentric cylinder 3
Angle successively homodromic deflection 360/n degree between long axis 34, it is preferred that single 31 quantity of eccentric cylinder is 4, its inner cylinder cross section
Angle is when successively homodromic deflection angle is 90 ° between long axis 34, the grinding efficiency highest of cylinder 3；It is single for being such as Figure 10 (a)
Material and mill when eccentric cylinder quantity is 2, its adjacent axis deflection angle is 180 °, at adjacent single eccentric cylinder interface
It is situated between in the when m- relative velocity curve of axis direction.From in the figure it can be found that being represented adjacent after the ore grinding time reaches 2s
Two rate curves that material and mill are situated between at single bias cylinder interface are 1m/s-1.2m/s, and in stable ore grinding
In, two rate curves are not overlapped；The speed difference that material and mill in interface two sides are situated between reaches 0.05m/s-
0.1m/s；
Figure 10 (b) be 3 for single 31 quantity of eccentric cylinder, when its adjacent axis deflection angle is 120 °, it is adjacent it is single partially
Material at heart cylinder interface and mill are situated between in the when m- relative velocity curve of axis direction.From the figure it can be found that grinding
After the mine time reaches 2s, representing two rate curves that material and mill are situated between at adjacent single eccentric cylinder interface is 1m/s-
1.22m/s, and within the stable ore grinding time, two rate curves are not overlapped；Material and mill in interface two sides
The speed difference of Jie reaches 0.05m/s-0.12m/s；
Figure 10 (c) be 4 for single 31 quantity of eccentric cylinder, when its adjacent axis deflection angle is 90 °, adjacent single bias
Material at cylinder interface and mill are situated between in the when m- relative velocity curve of axis direction.From the figure it can be found that in ore grinding
After time reaches 2s, representing two rate curves that material and mill are situated between at adjacent single eccentric cylinder interface is 1m/s-
1.22m/s, and within the stable ore grinding time, two rate curves are not overlapped；Material and mill in interface two sides
The speed difference of Jie reaches 0.05m/s-0.15m/s；
Figure 10 (d) be 6 for single 31 quantity of eccentric cylinder, when its adjacent axis deflection angle is 60 °, adjacent single bias
Material at cylinder interface and mill are situated between in the when m- relative velocity curve of axis direction.From the figure it can be found that in ore grinding
After time reaches 2s, representing two rate curves that material and mill are situated between at adjacent single eccentric cylinder interface is 1m/s-
1.2m/s, and within the stable ore grinding time, two rate curves are not overlapped；Material and mill in interface two sides are situated between
Speed difference reach 0.05m/s-0.1m/s.
Figure 10 (e) be in the cylinder for traditional structure the material of intermediate cross-section two sides with mill be situated between axis direction when it is m-
Relative velocity curve, from two speed songs that it can be found that after the ore grinding time reaches 2s, material and mill are situated between in cylinder in the figure
Line is 1m/s, and within the stable ore grinding time, and two rate curves for representing two sides at intermediate cross-section are completely overlapped, and mill is situated between
There is no speed difference between material；Compare Figure 10 (a) by analysis, Figure 10 (b), Figure 10 (c), Figure 10 (d) and Figure 10 (e) can be with
It was found that obtaining material by the quantity of the single eccentric cylinder of change and along the arrangement of axis and mill being situated between in axis side
To when m- relative velocity curve.It is found by comparing analysis, there are one for single bias cylinder quantity and its arrangement along axis
A optimum combination mode.
The eccentric cylinder 3 is divided with sequence from left to right, the left end of leftmost side eccentric cylinder 3, the right end of rightmost side eccentric cylinder 3
Flanged joint, the size of the connecting hole 11 on flange, number are not passed through with the left end of the right end of the feeding pipes 1, the trunnion 6 that discharges
Amount and its distribution are consistent with the flange face connecting hole on charging, discharge trunnion.
A method of design Symmetric Composite formula spiral shape ore grinding cylinder, comprising the following steps:
The first step measures structure size, number of moving part, charging grain class distribution, mill Jie proportion, filling rate, ore grinding of cylinder 3
Threshold velocity amplitude, calibration mill Jie-liner plate, mill Jie-mill Jie, material-liner plate, material-mill are situated between, are between material-material extensive
Complex coefficient, dynamic friction coefficient and static friction coefficient；
Second step, the method combined using MATLAB, ADAMS, EDEM simulate the grinding process of cylinder 3；
Third step, measure eccentric cylinder 31 33 axis of 32 axis of inner cylinder and outer cylinder between best eccentricity, bias
Optimal cross section shape, the quantity of eccentric cylinder 31 and 31 axis of each eccentric cylinder of 31 inner cylinders of cylinder are constituted along 7 direction of axis of rotation
The best axis of screw, it is preferred that by changing single 31 eccentricity of eccentric cylinder, and analyze its internal material and between mill is situated between
Relative velocity, tangential friction force and normal direction extruding force and the inner barrel be in lower-speed state material and mill betweenness purpose
Statistical result determines the best eccentricity of single eccentric cylinder；By changing the ellipse shape inner section inside single eccentric cylinder 31
Shape, and analyze relative velocity, tangential friction force, normal direction extruding force and the inner barrel between its materials inside and mill Jie
Material and mill betweenness purpose statistical law in lower-speed state, determine the optimal cross section shape of single eccentric inner barrel；It is logical
The quantity for changing single eccentric cylinder 31 and arrangement in the axial direction are crossed, and analyzes its internal material and between mill is situated between
Relative velocity, tangential friction force normal direction extruding force and the inner barrel be in lower-speed state material and mill betweenness purpose
Statistical law determines that each single eccentric tubular axis of composition combined barrel along combined barrel axis of rotation direction, has space
The helical form axis of symmetrical feature.
5th step, verification step: separately designing Symmetric Composite formula spiral shape ore grinding cylinder and conventional bead mill structure cylinder,
To use identical technological parameter and running parameter, carry out grinding process simulation analysis and experimental analysis respectively；By comparing it
Relative velocity, tangential friction force and normal direction extruding force and the inner barrel between internal material and mill Jie are in low speed shape
The material and mill betweenness purpose statistical result of state, verify reasonability of the invention.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, are similarly included in
In scope of patent protection of the invention.
Claims (8)
1. a kind of Symmetric Composite formula spiral shape ore grinding cylinder, be connected to including cylinder (3), respectively with the cylinder (3) end into
On the middle part outer wall of material trunnion (1), discharging trunnion (6) and transmission gear (4), the feeding pipes (1) and discharging trunnion (7)
It is set with organic frame left support (2) and rack right support (5), it is characterised in that: the cylinder (3) is by several eccentric cylinders
(31) docking is composed；The eccentric cylinder (31) includes inner cylinder (32), outer cylinder (33), the axis of the inner cylinder (32)
There are eccentricities between the axis of outer cylinder (33).
2. a kind of Symmetric Composite formula spiral shape ore grinding cylinder according to claim 1, it is characterised in that: several bias
The cross section of the outer cylinder (33) of cylinder (31) is the circle for waiting radiuses, and outer cylinder (33) axis is axis of rotation (7)；It is described
The axis of the inner cylinder (32) of several eccentric cylinders (31) is distributed about the axis of rotation (7) axial symmetry constitutes spatially spiral axis
(8)。
3. a kind of Symmetric Composite formula spiral shape ore grinding cylinder according to claim 2, it is characterised in that: the inner cylinder
(32) cross section showing ellipsoidal structure or ellipse polygonized structure or the ellipse polygonized structure of arc-straight section.
4. a kind of Symmetric Composite formula spiral shape ore grinding cylinder according to claim 3, it is characterised in that: the adjacent eccentric
Shape forms an angle between the long axis (34) of the inner cylinder cross section of cylinder (31).
5. a kind of Symmetric Composite formula spiral shape ore grinding cylinder according to claim 4, it is characterised in that: the eccentric cylinder
It (3) is n, the eccentric cylinder (3) is with sequence from left to right, between the long axis (34) of the inner cylinder cross section of eccentric cylinder (3)
Angle successively homodromic deflection 360/n degree.
6. a kind of Symmetric Composite formula spiral shape ore grinding cylinder according to claim 5, it is characterised in that: the eccentric cylinder
(3) with sequence from left to right, the left end of leftmost side eccentric cylinder (3), rightmost side eccentric cylinder (3) right end respectively with the charging
The right end of trunnion (1), the left end of discharging trunnion (6) pass through flanged joint.
7. a kind of method for designing the described in any item Symmetric Composite formula spiral shape ore grinding cylinders of 1-6, which is characterized in that step is such as
Under:
The first step measures structure size, number of moving part, charging grain class distribution, mill Jie proportion, filling rate, ore grinding door of cylinder (3)
Sill velocity amplitude, calibration mill Jie-liner plate, mill Jie-mill Jies, material-liner plate, material-mill Jie, the recovery between material-material
Coefficient, dynamic friction coefficient and static friction coefficient；
Second step, the method combined using MATLAB, ADAMS, EDEM simulate the grinding process of cylinder (3)；
Third step measures best eccentricity between inner cylinder (32) axis and outer cylinder (33) axis of eccentric cylinder (31), inclined
The axis edge of the optimal cross section shape of heart cylinder (31) inner cylinder, the quantity of eccentric cylinder (31) and each eccentric cylinder (31) inner cylinder is returned
The best axis of screw that shaft axis (7) direction is constituted.
8. a kind of design method of Symmetric Composite formula spiral shape ore grinding cylinder according to claim 7, it is characterised in that: also
Including verification step: Symmetric Composite formula spiral shape ore grinding cylinder and conventional bead mill structure cylinder are separately designed, using identical
Technological parameter and running parameter, carry out grinding process simulation analysis and experimental analysis respectively；By comparing its internal material
Mill be situated between relative velocity, tangential friction force and normal direction extruding force and the inner barrel be in lower-speed state material and
Betweenness purpose statistical result is ground, reasonability of the invention is verified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196909.3A CN109107696B (en) | 2018-10-15 | 2018-10-15 | Symmetrical combined spiral ore grinding barrel and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196909.3A CN109107696B (en) | 2018-10-15 | 2018-10-15 | Symmetrical combined spiral ore grinding barrel and design method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN109107696A true CN109107696A (en) | 2019-01-01 |
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