Background
Ball mills have been known as conventional grinding equipment for over 100 years. It is used as important equipment for refining and pulverizing solid material, and is widely used in metallurgical, chemical, cement, ceramic, building, electric power, medicine, national defense industry and other departments. Especially the ore dressing department in metallurgical industry, the ore grinding operation is very important.
The planetary ball mill grinding cylinder can be horizontally arranged or vertically arranged on the common turntable. The main difference between the two is that the movement modes of the grinding drums are different. The cylinder body of the common ball mill only rotates around a fixed central shaft, the planetary grinding cylinder moves in a complex plane, on one hand, the motor drives the common turntable to rotate, and the grinding cylinder arranged on the common turntable rotates along with the common turntable, so that the planetary grinding cylinder moves in a revolution and a connection manner; on the other hand, the grinding cylinder also rotates around the central shaft of the grinding cylinder to move relatively under the action of the transmission of the gears or the triangular belts. This planar motion of the drum, which has both revolution and rotation, is referred to as planetary motion. The planetary motion of the grinding cylinder is a basic sign of the planetary ball mill as distinguished from the common ball mill. It can be regarded as a new model developed by combining a common ball mill with a centrifugal ball mill.
The planetary high-energy ball mill can crush and grind materials and is widely used in the fields of metallurgy, mineral products, chemical industry, medicine, geology and the like. The planetary ball mill is provided with a plurality of ball milling tanks on the same main shaft turntable, and each ball milling tank rotates, namely, performs planetary motion while revolving around the main shaft. Compared with other ball mills, the ball mill has higher impact force and impact frequency, can better crush and weld powder, is an important device for a mechanical alloying method in material preparation, and is a complex physicochemical process for alloying element atomic scale by repeatedly deforming, cold welding, crushing and refining the material and continuously exposing fresh surfaces by utilizing long-time high-energy impact and rolling between the material, the grinding ball and the ball milling tank in the material preparation process, so that each element atom is mutually diffused or subjected to solid state reaction.
The planetary grinding cylinder is horizontally arranged on the large turntable which is arranged perpendicular to the ground plane, and when in operation, the planetary grinding cylinder not only rotates per se, but also revolves along with the large turntable to form planetary motion. In the moving process, the ball milling tank has no fixed bottom surface, and the grinding balls and the grinding materials in the grinding cylinder are subjected to the combined action of revolution centrifugal force, rotation centrifugal force and gravity in a vertical plane. When the machine rotates, the stress of each point in the tank is continuously changed in size and direction, so that the grinding balls and the grinding materials are collided and extruded violently in high-speed operation, and the grinding efficiency and the grinding effect are greatly improved. Particularly, the ball milling tank is in a horizontal arrangement mode, and has no fixed bottom surface due to autorotation, so that the phenomenon of bottom formation of a part of raw materials is avoided.
In recent years, due to the increase of energy cost and the reduction of ore grade, the reduction of construction investment and production cost is a serious problem facing the mining industry of various countries in the world, the adoption of high-efficiency large-scale equipment is the main trend of the construction of modern mineral processing plants, and the enlargement of a horizontal ball mill and the reduction of vibration and noise are defects in the prior art.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore may contain information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to overcome the drawbacks of the prior art and to provide a turntable device for a planetary ball mill, which can be large-sized and reduce vibration and noise, and which significantly improves the crushing efficiency and the service life of the device.
In order to achieve the above object, the turntable device for a planetary ball mill according to the present invention comprises:
a central axis of the cylinder,
a first turntable including a first turntable surface perpendicular to the central axis and a first inclined surface located at an edge of the first turntable, the first inclined surface being adjacent to the first turntable surface, the first turntable surface being provided with a first central hole and a plurality of first through holes being centrally symmetrical, the first turntable being vertically fixed to the central axis via the first central hole,
a second turntable disposed parallel to the first turntable, the second turntable including a second turntable surface perpendicular to the central axis and a second inclined surface at an edge of the second turntable, the second inclined surface being adjacent to the second turntable surface and parallel to the first inclined surface, the second turntable surface being provided with a second central hole and a plurality of second through holes which are centrally symmetrical, the second turntable being vertically fixed to the central axis via the second central hole,
the first and second through holes are coaxially arranged such that the planetary mill barrel is rotatably arranged between the first and second turntable surfaces via the first and second through holes.
In the turntable device for the planetary ball mill, the first turntable and the second turntable are of a truncated cone structure.
In the turntable device for a planetary ball mill, the first turntable and/or the second turntable are/is fixed to the central shaft via shaft pins.
In the turntable device for a planetary ball mill, the axes of the first through hole and the second through hole which are coaxially arranged are parallel to the central axis.
In the turntable device for a planetary ball mill, a gap between the first inclined surface and the second inclined surface forms a discharge cavity.
In the turntable device for the planetary ball mill, the first turntable surface and the second turntable surface are respectively provided with a first inner wall and a second inner wall which are coaxial, and the planetary mill cylinder is tangential to the first inner wall and the second inner wall.
In the turntable device for the planetary ball mill, the planetary mill cylinder is rotatably connected with the first turntable and the second turntable through the shaft sleeve.
In the turntable device for the planetary ball mill, the first turntable and the second turntable are of an integrated structure.
In the turntable device for a planetary ball mill, the first turntable and the second turntable have 4 first through holes and 4 second through holes coaxially arranged, respectively, and 4 planetary grinding drums are rotatably arranged in the first through holes and the second through holes.
In the turntable device for a planetary ball mill, the driving unit drives the second turntable via a belt, and the second turntable rotates with a central shaft so that the first turntable rotates synchronously.
In the turntable device for a planetary ball mill, the central shaft is supported on a frame.
The invention has the beneficial effects that:
the first turntable and the second turntable of the turntable device for the planetary ball mill enable the turntable device to be stable in revolution and small in vibration and noise on the basis of large size, the planetary grinding cylinder rotatably arranged between the surfaces of the first turntable and the second turntable through the first through hole and the second through hole rotates along with the revolution of the first turntable and the second turntable, the first transmission piece and the second transmission piece are mutually matched to enable the connecting shaft to rotate at a speed different from the rotating speed of the central shaft, and the turntable device can be large in size, stable in operation, small in vibration and noise and capable of achieving revolution and differential rotation through one power source.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic structural view of a turntable device for a planetary ball mill according to an embodiment of the present invention, as shown in the drawings, a turntable device for a planetary ball mill comprising:
the central axis 200 is provided with a central axis,
a first rotating disc 310, the first rotating disc 310 including a first rotating disc surface 311 perpendicular to the central shaft 200 and a first inclined surface 312 at an edge of the first rotating disc 311, the first inclined surface 312 abutting the first rotating disc surface 311, the first rotating disc surface 311 being provided with a first central hole and a plurality of first through holes of central symmetry, the first rotating disc 310 being vertically fixed to the central shaft 200 via the first central hole,
the second turntable 320, the second turntable 320 arranged parallel to the first turntable 310, includes a second turntable surface 321 perpendicular to the central axis 200 and a second inclined surface 322 located at an edge of the second turntable 320, the second inclined surface 322 being adjacent to the second turntable surface 321 and parallel to the first inclined surface 312, the second turntable surface 321 being provided with a second central hole and a plurality of centrally symmetrical second through holes, the second turntable 320 being vertically fixed to the central axis 200 via the second central hole, the first through holes and the second through holes being coaxially arranged such that the planetary rollers are rotatably arranged between the first turntable surface 311 and the second turntable surface 321 via the first through holes and the second through holes.
In a preferred embodiment of a turntable device for a planetary ball mill according to the present invention, the first turntable 310 and the second turntable 320 have a truncated cone structure.
In a preferred embodiment of a turntable assembly for a planetary ball mill according to the present invention, the first turntable 310 and/or the second turntable 320 are fixed to the central shaft via shaft pins.
In a preferred embodiment of a turntable device for a planetary ball mill according to the present invention, the axes of the first and second through holes coaxially arranged are parallel to the central axis 200.
In a preferred embodiment of a turntable assembly for a planetary ball mill according to the present invention, the gap between the first inclined surface 312 and the second inclined surface 322 forms a discharge cavity.
In a preferred embodiment of a turntable assembly for a planetary ball mill according to the present invention, the first turntable surface 311 and the second turntable surface 321 are provided with a first inner wall and a second inner wall, respectively, which are coaxial, and the planetary mill cylinder is tangential to the first inner wall and the second inner wall.
In a preferred embodiment of a turntable device for a planetary ball mill according to the present invention, a planetary mill tube rotatably connects the first turntable 310 and the second turntable 320 via a shaft sleeve.
In a preferred embodiment of a turntable device for a planetary ball mill according to the present invention, the first turntable 310 and the second turntable 320 are integrally formed.
In a preferred embodiment of a turntable device for a planetary ball mill according to the present invention, the first turntable 310 and the second turntable 320 have 4 first through holes and 4 second through holes coaxially arranged, respectively, and 4 planetary rollers are rotatably arranged in the first through holes and the second through holes.
In a preferred embodiment of a turntable device for a planetary ball mill according to the present invention, the driving unit 700 drives the second turntable 320 via a belt, and the second turntable 320 rotates with the central shaft 200 such that the first turntable 310 rotates in synchronization.
For a further understanding of the invention, reference is made to the following examples for further illustration.
In one embodiment, the first rotating disc 310 and the second rotating disc 320 are in a truncated cone structure, the plurality of fixing members connect the first inclined surface 312 and the second inclined surface 322, a gap between the first inclined surface 312 and the second inclined surface 322 forms a discharging cavity, and the discharging port is located in the discharging cavity. The first rotating disc surface 311 and the second rotating disc surface 321 are respectively provided with a first inner wall and a second inner wall which are coaxial, and the grinding cylinder body is tangential to the first inner wall and the second inner wall.
In one embodiment, the central shaft 200 is supported on the frame 100.
In one embodiment, the drive unit 700 is a motor.
In one embodiment, the mounting portion 330 is fixedly coupled to the second turntable 320 and rotates in synchronization with the second turntable 320, the mounting portion 330 including,
the mounting body 331 is provided with a plurality of mounting holes,
pi Daicao 332, a belt groove 332 provided on the mounting body 331 connects the driving 700 unit via a belt to drive the mounting portion 330 and the second turntable 320,
two bushings supporting the planetary rollers such that the planetary rollers passing through the first and second through holes 313 and 323 are rotatably disposed between the first and second turntable surfaces 311 and 321.
In one embodiment, the discharge device 500 is closely coupled to the first and second turntables 310 and 320, the discharge device 500 fixedly coupled to the frame 100 is configured to discharge the abrasive material from the discharge port, the discharge device 500 includes,
a closed housing 510 which is closed to connect the turntable device 300 to form a closed discharge space, the closed housing 510 including a plurality of sealing members 511 provided on the closed housing 510, a plurality of first discharge ports 512 distributed at a middle upper portion of the closed housing 510, and a plurality of second discharge ports 513 distributed at a lower portion of the closed housing 510, the plurality of sealing members 511 being sealingly coupled to the second turntable 320,
and a negative pressure forming unit configured to form a negative pressure of a predetermined pressure in the discharge space to discharge a predetermined weight of the abrasive from the first discharge port 512, and the abrasive exceeding the predetermined weight is discharged from the second discharge port 513 based on the action of gravity.
In one embodiment, the bottom of the closed housing 510 is provided with a flat bottom receiving portion in which the abrasive exceeding a predetermined weight is received based on the action of gravity, and the abrasive in the receiving portion is discharged through the second discharge port 513.
In one embodiment, the closed housing 510 includes a first housing 516 provided on the right side of the first rotary table 310, a second housing 517 provided on the left side of the second rotary table 320, and an annular housing connecting the first housing 516 and the second housing 517 to form a substantially annular closed discharge space.
In one embodiment, the feeding device 600 is attached to the first rotating disc 310, and the feeding device 600 configured to continuously feed comprises,
a feeding mechanism 610, the feeding mechanism 610 configured to continuously supply material is fixed on the frame 100, and comprises a feeding hopper 611, the feeding hopper 611 containing the material to be crushed is provided with a feeding opening 612, the feeding hopper 611 is vertically and downwardly fed to the feeding opening 612,
a feed divider 620, said feed divider 620 configured to distribute material to a plurality of said mill cylinder bodies, rotates synchronously with the turntable assembly 300, comprising,
a feed inlet 621, a feed inlet 621 rotatably fitted with the feed inlet 612 is arranged at the center position of the feed mechanism 620,
the material distribution openings are respectively communicated with the material inlet, and the material distribution openings are communicated with the material inlet through a spiral material inlet channel.
Industrial applicability
The turntable device for a planetary ball mill of the present invention can be manufactured and used in the crushing field.
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described specific embodiments and application fields, and the above-described specific embodiments are merely illustrative, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous forms of the invention without departing from the scope of the invention as claimed.