Vibration excitation device for annular material distribution structure and concentrating machine

Abstract

The invention relates to the technical field of ore sorting equipment, and discloses a vibration excitation device for an annular material distribution structure and a concentrating machine, and the vibration excitation device comprises a vibration disc and a vibration exciter. A through hole is formed in the center of the vibration disc. The vibration exciter comprises a shell, a driving piece and an eccentric piece. The shell is installed on the through hole and provided with a vibration excitation cavity. The driving part is arranged on the shell, the extending direction of an output shaft of the driving part coincides with the center line of the vibration disc, and the output shaft of the driving part extends into the excitation cavity. The eccentric part is arranged in the excitation cavity and is in transmission connection with the output end of the driving part, an axial limiting structure is arranged between the eccentric part and the shell, and the axial limiting structure is used for preventing the eccentric part from moving in the extending direction of the output shaft. The conveying path of ore raw materials is shortened in an annular material distribution mode, the movement speed of the ore raw materials is accurately controlled through cooperation of the vibration exciter and the vibration disc, so that the sorting precision of the ore raw materials is guaranteed, and the contradiction between the size and the sorting precision of ore sorting equipment is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ore sorting equipment, and in particular to a vibration device for an annular material distribution structure and a ore dressing machine. Background Art

[0002] The ore mining process can be divided into five major stages: exploration and evaluation, mining implementation, ore processing, mineral processing and environmental protection. In the mineral processing stage, ore sorting equipment is usually used for mineral processing. Conventional ore sorting equipment includes a drop port, a conveyor belt, a laser emitting device, a laser receiving device and an impurity removal device. After the ore raw materials enter the drop port, they are transported by a conveyor belt. During the transportation process, the laser emitting device and the laser receiving device cooperate with the processor to determine the target minerals and waste rock through spectral analysis or physical property detection, and then the waste rock is removed by the impurity removal device. The impurity removal device can be a jet valve, which blows the waste rock through a high-speed airflow to achieve the purpose of impurity removal.

[0003] Conventional ore sorting equipment needs to strictly control the conveying speed of ore raw materials to ensure sorting accuracy, so its conveyor belt is generally longer to facilitate the control of the conveying speed of ore raw materials. However, this will result in a larger volume of the ore sorting equipment and a higher space occupancy rate. If the size of the transmission belt is shortened, the conveying speed of the material cannot be accurately controlled. Therefore, conventional ore sorting equipment cannot resolve the contradiction between volume size and sorting accuracy. Summary of the invention

[0004] In view of this, the present invention provides an excitation device and a ore dressing machine for an annular material distribution structure, so as to solve the problem of the contradiction between the volume size and the sorting accuracy of conventional ore sorting equipment.

[0005] In a first aspect, the present invention provides a vibration excitation device for an annular cloth structure, comprising: A vibration plate, with a through hole at the center; Vibrator, including: A housing, mounted on the through hole, having an excitation cavity; A driving member, arranged on the housing, wherein the extension direction of the output shaft of the driving member coincides with the center line of the vibration disk and extends into the excitation cavity; The eccentric piece is arranged in the excitation cavity and is drivingly connected to the output shaft of the driving member. An axial limiting structure is arranged between the eccentric piece and the housing, and the axial limiting structure is used to prevent the eccentric piece from being displaced along the extension direction of the output shaft.

[0006] Optionally, a coupling is provided at the output end of the driving member, and the eccentric member is drivingly connected to the coupling via an eccentric shaft.

[0007] Optionally, the eccentric member comprises: A clamping sleeve, sleeved on the eccentric shaft and fixedly connected; An eccentric block, integrally formed with the clamping sleeve, the eccentric block having an arc surface that is in clearance fit with the inner wall of the excitation cavity.

[0008] Optionally, the housing includes: A first outer shell, the outer wall of which fits against the through hole, a first mounting edge is provided at the opening of the first outer shell, and the first mounting edge is fixedly connected to the vibrating disk; A second outer shell, the outer wall of which fits against the inner wall of the opening of the first outer shell, a second mounting edge is provided on the second outer shell, and the second mounting edge is fixedly connected to the first mounting edge, and the excitation cavity is formed between the first outer shell and the second outer shell, and a shaft hole is provided on the second outer shell, and the coupling is located in the shaft hole; A first bearing is provided on the first outer shell, a second bearing is provided on the second outer shell, and both ends of the eccentric shaft are rotatably fitted with the first bearing and the second bearing respectively; The axial limiting structure includes a first annular boss and a second annular boss coaxially arranged on the eccentric shaft. In the extending direction of the eccentric shaft, the first bearing, the first annular boss, the clamping sleeve, the second annular boss and the second bearing are sequentially fitted together.

[0009] Optionally, the first outer shell has a first stepped hole, the second outer shell has a second stepped hole, the second stepped hole is coaxially arranged with the shaft hole and is located at one end of the shaft hole close to the excitation cavity, the first stepped hole is coaxially arranged with the second stepped hole and is located at one end of the shaft hole close to the excitation cavity, the first stepped hole is coaxially arranged with the second stepped hole, the first bearing is installed in the first stepped hole, and the second bearing is installed in the second stepped hole.

[0010] Optionally, a first limiting member is provided on the first outer shell, the shape of the first limiting member is annular, the inner edge of the first limiting member presses against the first bearing, a second limiting member is provided on the second outer shell, the shape of the second limiting member is annular, and the inner edge of the second limiting member presses against the second bearing.

[0011] Optionally, a first stepped groove is provided on the first outer shell, the first limiting member has a first annular protrusion adapted to the shape of the first stepped groove, a second stepped groove is provided on the second outer shell, and the second limiting member has a second annular protrusion adapted to the shape of the second stepped groove.

[0012] Optionally, a sleeve is provided on the outer side of the first shell, the inner wall of the sleeve is fitted with the outer wall of the first shell, the sleeve has a third mounting edge adapted to the shape of the first mounting edge, and the vibration plate is located between the first mounting edge and the third mounting edge.

[0013] Optionally, a protective cover is provided on the outer edge of the through hole of the vibration plate, the exciter is located inside the protective cover, and there is a gap between the protective cover and the exciter.

[0014] In a second aspect, the present invention provides a concentrator for an annular material distribution structure, comprising the above-mentioned excitation device for a circular material distribution machine, and further comprising: A frame, wherein the frame is provided with a barrel for dropping materials; The vibration device is installed on the frame through a bracket, and the vibration plate is opposite to the barrel and is used to receive the material from the barrel.

[0015] Beneficial effects: 1. The vibration excitation device for annular cloth structure provided by the present invention comprises: a vibration plate and a vibration exciter.

[0016] A through hole is provided at the center of the vibration disk. The exciter includes: a shell, a driving member and an eccentric member. The shell is mounted on the through hole and has an excitation cavity. The driving member is provided on the shell, and the extension direction of the output shaft of the driving member coincides with the center line of the vibration disk and extends into the excitation cavity. The eccentric member is provided in the excitation cavity and is transmission-connected to the output shaft of the driving member. An axial limiting structure is provided between the eccentric member and the shell, and the axial limiting structure is used to prevent the eccentric member from being displaced along the extension direction of the output shaft.

[0017] The vibration disk can be used as a receiving structure for the ore raw materials. The vibration of the vibration disk can be controlled by the exciter, so that the ore raw materials move radially on the surface of the vibration disk. The exciter is arranged at the center of the vibration disk, thereby ensuring that the exciting force is evenly transmitted from the middle to the edge of the vibration disk, so that the movement speed of the ore raw materials can be controlled. Specifically, the exciter has a shell with a through hole installed on the vibration disk, and the output shaft of the driving member can drive the eccentric member to rotate around the center line of the vibration disk, and an axial limiting structure is arranged between the eccentric member and the shell to ensure that the eccentric member can stably rotate around the rotation axis of the output shaft, and the exciting force of the eccentric member can be stably transmitted to the vibration disk through the shell. Such an arrangement can improve the controllability of the vibration amplitude and vibration frequency output by the vibration disk, thereby accurately controlling the speed of the ore raw materials moving on the vibration disk, which is convenient for the subsequent detection and impurity removal of the ore raw materials.

[0018] Compared with conventional ore sorting equipment, the vibration plate provided by the present invention shortens the conveying path of the ore raw materials by adopting a circular distribution method, and can accurately control the movement speed of the ore raw materials through the cooperation of the exciter and the vibration plate to ensure the sorting accuracy of the ore raw materials, thereby solving the contradiction between the volume size and sorting accuracy of the ore sorting equipment.

[0019] 2. In the vibration excitation device for annular cloth structure provided by the present invention, a coupling is arranged at the output end of the driving member, and the eccentric member is transmission-connected to the coupling via an eccentric shaft. The coupling can correct the concentricity deviation between the output shaft of the driving member and the eccentric shaft, thereby improving the transmission efficiency and reducing the lateral force exerted by the eccentric shaft on the output shaft, thereby protecting the driving member and ensuring the stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Schematic diagram of the structure of the excitation device according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the excitation device shown; Figure 3 A schematic diagram of the structure of a vibration plate according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of an exciter according to an embodiment of the present invention; Figure 5 is a schematic cross-sectional structural diagram of an exciter according to an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a first housing and a second housing according to an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a protective cover according to an embodiment of the present invention; Figure 8 is a schematic cross-sectional structure diagram of an upper cover body according to an embodiment of the present invention; Figure 9 A schematic structural diagram of a notch of an upper cover body according to an embodiment of the present invention; Figure 10 It is a schematic cross-sectional structure diagram of a mineral processing machine according to an embodiment of the present invention; Figure 11 It is a schematic structural diagram of an elastic support column according to an embodiment of the present invention.

[0022] Description of reference numerals: 1. Vibration plate; 101. Through hole; 2. Vibrator; 21. Shell; 201. Excitation chamber; 211. First shell; 212. Second shell; 213. First mounting edge; 214. Second mounting edge; 215. Shaft hole; 216. Baffle; 202. First step hole; 203. Second step hole; 204. First step groove; 205. Second step groove; 22. Driving member; 221. Output shaft; 23. Eccentric member; 231. Clamping sleeve; 232. Eccentric block; 24. Coupling; 24 1. Power input end; 242. Power output end; 25. Eccentric shaft; 251. First annular boss; 252. Second annular boss; 261. First bearing; 262. Second bearing; 27. First stopper; 28. Second stopper; 3. Housing; 31. Third mounting edge; 4. Protective cover; 41. Upper cover body; 411. Notch; 42. Lower cover body; 5. Bracket; 51. Elastic support column; 52. First fastener; 53. Second fastener; 54. Support frame; 6. Frame; 7. Barrel. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a vibration excitation device for an annular cloth structure, including: a vibration plate 1 and an exciter 2.

[0025] A through hole 101 is provided at the center of the vibration plate 1. The vibration plate 1 can be used as a receiving structure and a conveying structure for ore raw materials. The vibration plate 1 can be made of manganese steel material. The vibration of the vibration plate 1 can be controlled by the exciter 2, so that the ore raw materials move radially on the surface of the vibration plate 1.

[0026] The vibrator 2 includes: a housing 21, a driving member 22, and an eccentric member 23. The housing 21 is mounted on the through-hole 101 and has a vibration chamber 201. The driving member 22 is disposed on the housing 21. The driving member 22 can be an electric motor or a pneumatic motor. The extending direction of the output shaft 221 of the driving member 22 coincides with the center line of the vibrating disk 1 and extends into the vibration chamber 201. The eccentric member 23 is disposed in the vibration chamber 201 and is in transmission connection with the output shaft 221 of the driving member 22. An axial limiting structure is provided between the eccentric member 23 and the housing 21. The axial limiting structure is used to prevent the eccentric member 23 from displacing along the extending direction of the output shaft 221. Since the extending direction of the output shaft 221 of the driving member 22 coincides with the center line of the vibrating disk 1, the rotation axis of the output shaft 221 coincides with the center line. Then, when the eccentric member 23 rotates around the rotation axis of the output shaft 221, it is equivalent to rotating around the center line of the vibrating disk 1. The exciting force generated when the eccentric member 23 rotates is transmitted from the center of the vibrating disk 1 to the edge.

[0027] The vibrator 2 is disposed at the center of the vibrating disk 1. Thus, it can be ensured that the exciting force is evenly transmitted from the middle to the edge of the vibrating disk 1, and the movement speed of the ore raw materials can be controlled. Specifically, the vibrator 2 has a housing 21 mounted on the through-hole 101 of the vibrating disk 1. The output shaft 221 of the driving member 22 can drive the eccentric member 23 to rotate around the center line of the vibrating disk 1. An axial limiting structure is provided between the eccentric member 23 and the housing 21 to ensure that the eccentric member 23 can stably rotate around the rotation axis of the output shaft 221. The exciting force of the eccentric member 23 can be stably transmitted to the vibrating disk 1 through the housing 21. With such a setting, the controllability of the vibration amplitude and vibration frequency output by the vibrator can be improved. Thus, the movement speed of the ore raw materials on the vibrating disk 1 can be accurately controlled, which is convenient for subsequent detection and impurity removal of the ore raw materials.

[0028] Compared with conventional ore sorting equipment, the vibrating disk 1 provided by the present invention can reduce the conveying path of the ore raw materials by adopting the annular feeding method, and through the cooperation of the vibrator 2 and the vibrating disk 1, the movement speed of the ore raw materials can be accurately controlled to ensure the sorting accuracy of the ore raw materials, and the contradiction between the volume size and the sorting accuracy of the ore sorting equipment is solved.

[0029] The projected shape of the vibrating disk 1 in this embodiment can be annular, and the height of the vibrating disk 1 gradually decreases from the through-hole 101 to the edge, which is convenient for the materials to be evenly distributed along the annular surface of the vibrating disk 1.

[0030] Such as Figure 2 、 Figure 4 and Figure 5As shown, in this embodiment, a coupling 24 is provided at the output end of the driving member 22. The eccentric member 23 is drivingly connected to the coupling 24 through an eccentric shaft 25. The output shaft 221 of the driving member 22 is connected to the power input end 241 of the coupling 24, and the eccentric shaft 25 is connected to the power output end 242 of the coupling 24, so that the driving force of the driving member 22 can be transmitted to the eccentric member 23 through the output shaft 221, the coupling 24, and the eccentric shaft 25.

[0031] The type of the coupling 24 can be an elastic coupling. Specifically, an elastic bushing pin coupling, a plum coupling, a diaphragm coupling, a spiral groove type elastic coupling, etc. can be selected. The coupling 24 can correct the concentricity deviation between the output shaft 221 of the driving member 22 and the eccentric shaft 25, improve the transmission efficiency, and can also reduce the lateral force generated by the eccentric shaft 25 on the output shaft 221, play a role in protecting the driving member 22, and ensure the stable operation of the equipment.

[0032] As Figure 5 shown, in this embodiment, the power input end 241 of the coupling 24 is configured as a coupling hole. The output shaft 221 of the driving member 22 extends into the coupling hole and is fixedly connected together. For example, the output shaft 221 and the coupling hole can be fitted together by interference fit, shaft pin, or spline shaft and key groove, etc. The power output end 242 of the coupling 24 is configured as a connecting shaft, and the eccentric shaft 25 is configured as a hollow shaft. The connecting shaft extends into the hollow shaft and is fixedly connected to the inner wall of the hollow shaft. For example, the connecting shaft and the hollow shaft can be fitted together by interference fit, shaft pin, or spline shaft and key groove, etc. Thereby, the transmission stability between the eccentric shaft 25 and the output shaft 221 can be improved, the vibration resistance performance of the eccentric shaft 25 can be improved, and at the same time, the weight of the eccentric shaft 25 can be reduced.

[0033] As Figure 5 shown, in this embodiment, the housing 21 includes: a first outer shell 211 and a second outer shell 212. The first outer shell 211 and the second outer shell 212 can be made of hard materials such as cast iron, cast steel, or stainless steel.

[0034] The shape of the first outer shell 211 can be cylindrical. The outer wall of the first outer shell 211 is fitted to the through hole 101. A first mounting edge 213 is provided at the opening of the first outer shell 211. The first mounting edge 213 is fixedly connected to the vibrating disk 1. For example, a plurality of positioning pin holes are correspondingly provided on the first mounting edge 213 and the vibrating disk 1, and then fixed by locking screws, so that the first outer shell 211 can transmit the exciting force to the vibrating disk 1.

[0035] The second housing 212 may be cylindrical in shape. The second housing 212 extends from the opening of the first housing 211 into the interior of the first housing 211. The outer wall of the second housing 212 fits the inner wall of the opening of the first housing 211. The second housing 212 is provided with a second mounting edge 214. The second mounting edge 214 is fixedly connected to the first mounting edge 213. For example, a plurality of positioning pin holes are correspondingly provided on the first mounting edge 213 and the second mounting edge 214, and then fixed by locking screws. The second mounting edge 214 and the outer wall of the second housing 212 may also form a step that matches the opening of the first housing 211 to ensure the stability of the installation of the first housing 211 and the second housing 212. An excitation cavity 201 is formed between the first housing 211 and the second housing 212. An axial hole 215 is provided on the second housing 212, that is, the hollow inner cavity of the second housing 212 forms the axial hole 215, and the coupling 24 is located in the axial hole 215.

[0036] Such an arrangement can ensure that the second housing 212 is tightly assembled with the first housing 211 , and can ensure that the overall structure is compact, thereby preventing the first housing 211 and the second housing 212 from shaking relative to each other.

[0037] A first bearing 261 is provided on the first shell 211, and a second bearing 262 is provided on the second shell 212. The two ends of the eccentric shaft 25 are rotatably matched with the first bearing 261 and the second bearing 262 respectively, that is, the outer walls at both ends of the eccentric shaft 25 are rotatably matched with the first bearing 261 and the second bearing 262 respectively. Since the eccentric shaft 25 is a hollow shaft, the distance between the eccentric shaft 25 and the output shaft 221 can be shortened, and the size of the second shell 212 in the center line direction of the vibration disk 1 can be shortened, making the structure compact. At the same time, the distance between the eccentric member 23 and the vibration disk 1 can be shortened, thereby improving the transmission effect of the exciting force generated by the eccentric member 23, and further improving the vibration amplitude and vibration frequency controllability of the vibration disk 1.

[0038] like Figure 2 and Figure 5 As shown, in this embodiment, the eccentric member 23 includes: a clamping sleeve 231 and an eccentric block 232 .

[0039] The clamping sleeve 231 is sleeved on the eccentric shaft 25 and fixedly connected, the eccentric block 232 is integrally formed with the clamping sleeve 231, and one end of the clamping sleeve 231 away from the eccentric block 232 is two clamping blocks, and the clamping blocks have inner arc surfaces that match the outer wall of the eccentric shaft 25. The two clamping blocks can be fixed by tightening screws to fix the clamping sleeve 231 on the eccentric shaft 25, and the eccentric block 232 has an arc surface that matches the inner wall gap of the excitation chamber 201. The distance between the center of mass of the eccentric block 232 and the axis of rotation can be adjusted by changing the size of the clamping sleeve 231, that is, the eccentric distance can be flexibly adjusted. The eccentric block 232 and the clamping sleeve 231 are integrally formed to ensure stable transmission, thereby ensuring the stability of the entire exciter 2.

[0040] like Figure 5 As shown, in the present embodiment, there are gaps between the two relative surfaces of the eccentric block 232 and the surfaces of the first limit member 27 and the second limit member 28 respectively, one of the surfaces of the first limit member 27 is used to press the first bearing 261, that is, to press on the outer ring of the first bearing 261, one of the surfaces of the second limit member 28 is used to press the second bearing 262, that is, to press on the outer ring of the second bearing 262, and the other surface of the first limit member 27 is opposite to the other surface of the second limit member 28, thereby preventing the eccentric block 232 from shaking or displacing, and further improving the control of the vibration amplitude and vibration frequency of the vibration disk 1.

[0041] The axial limiting structure includes a first annular boss 251 and a second annular boss 252 coaxially arranged on the eccentric shaft 25. In the extension direction of the eccentric shaft 25, the first bearing 261, the first annular boss 251, the clamping sleeve 231, the second annular boss 252 and the second bearing 262 are sequentially fitted together, the first annular boss 251 is fitted on the inner ring of the first bearing 261, and the second annular boss 252 is fitted on the inner ring of the second bearing 262. During operation, the eccentric shaft 25, the inner ring of the first bearing 261 and the inner ring of the second bearing 262 rotate synchronously, and the inner ring of the first bearing 261 and the inner ring of the second bearing 262 rotate relative to their respective outer rings through the rotating body. Such an arrangement can prevent the clamping sleeve 231 from shaking relative to the eccentric shaft 25, and further improve the stability of the eccentric shaft 25 driving the eccentric block 232 to move.

[0042] The first annular boss 251 can be integrally formed on the outer wall of the eccentric shaft 25, and the second annular boss 252 can be a sleeve. The second annular boss 252 is sleeved on the eccentric shaft 25. During assembly, the clamping sleeve 231 can be first sleeved on the eccentric shaft 25 to fit the first annular boss 251, and then the second annular boss 252 can be sleeved on the eccentric shaft 25.

[0043] like Figure 5As shown, in this embodiment, the first housing 211 has a first stepped hole 202, and the second housing 212 has a second stepped hole 203. The second stepped hole 203 is coaxially arranged with the shaft hole 215 and is located at one end of the shaft hole 215 close to the excitation cavity 201. The first stepped hole 202 is coaxially arranged with the second stepped hole 203. The first bearing 261 is installed in the first stepped hole 202, and the second bearing 262 is installed in the second stepped hole 203. With such an arrangement, the concentricity of the first bearing 261 and the second bearing 262 can be improved, ensuring that the rotation axis of the eccentric shaft 25 coincides with the center line of the vibration disc 1, and further improving the controllability of the vibration amplitude and vibration frequency of the vibration disc 1.

[0044] As Figure 6 shown, in an implementation manner of this embodiment, the sizes of the first stepped hole 202 and the second stepped hole 203 are exactly the same. For example, during processing, the first housing 211 and the second housing 212 can be assembled and fixed first, and then the bearing hole positions are processed on the first housing 211 and the second housing 212 in sequence by a processing machine tool. The bearing hole positions are the above-mentioned first stepped hole 202 and second stepped hole 203. The diameter dimension of the bearing hole positions can be d1. According to the size after the first housing 211 and the second housing 212 are assembled, the machining depth of the machine tool can be s1, and the depths of the two formed bearing hole positions can both be s2. s1 can include the sum of the depths of the two bearing hole positions and the depth of the excitation cavity 201, that is, two identical bearing hole positions are machined at one time, ensuring that the first bearing 261 and the second bearing 262 can be exactly the same, thereby improving the concentricity.

[0045] The second stepped hole 203 can be directly machined to completion. The first stepped hole 202 can be formed by a retaining piece 216 arranged outside the first housing 211 and the bearing hole position. The first housing 211 and the second housing 212 machined at one time can be numbered and used in supporting later, thereby ensuring the concentricity of the first stepped hole 202 and the second stepped hole 203.

[0046] In addition, before machining the bearing hole positions, the shaft hole for accommodating the output shaft 221 of the driving member 22 and the coupling 24 can be preferentially machined, and then the bearing hole positions are machined to ensure the concentricity of the shaft hole, the first stepped hole 202, and the second stepped hole 203.

[0047] As Figure 5As shown in the figure, in this embodiment, a first limiting member 27 is provided on the first outer shell 211. The first limiting member 27 is annular in shape. The inner edge of the first limiting member 27 presses against the first bearing 261. One end of the first bearing 261 in the extending direction of the rotation axis abuts against the first stepped hole 202, and the other end abuts against the first limiting member 27. A second limiting member 28 is provided on the second outer shell 212. The second limiting member 28 is annular in shape. The inner edge of the second limiting member 28 presses against the second bearing 262. One end of the second bearing 262 in the extending direction of the rotation axis abuts against the second stepped hole 203, and the other end abuts against the second limiting member 28. With such a setting, the first bearing 261 and the second bearing 262 can be prevented from shaking or displacing, thereby preventing the eccentric shaft 25 from shaking, further ensuring concentricity, and improving the controllability of the vibration amplitude and vibration frequency of the vibrating disk 1.

[0048] As Figure 5 shown in the figure, in this embodiment, a first stepped groove 204 is provided on the first outer shell 211. The first limiting member 27 has a first annular protrusion adapted to the shape of the first stepped groove 204. A second stepped groove 205 is provided on the second outer shell 212. The second limiting member 28 has a second annular protrusion adapted to the shape of the second stepped groove 205. With such a setting, the first limiting member 27 and the second limiting member 28 can be prevented from shaking, thereby ensuring that the eccentric block 232 can rotate stably around the rotation axis.

[0049] The first limiting member 27 can be fixed to the first stepped groove 204 by tightening screws, and the second limiting member 28 can be fixed to the second stepped groove 205 by tightening screws.

[0050] As Figure 2 shown in the figure, in this embodiment, a sleeve 3 is provided on the outer side of the first outer shell 211. The inner wall of the sleeve 3 fits against the outer wall of the first outer shell 211. The sleeve 3 has a third mounting edge 31 adapted to the shape of the first mounting edge 213. The vibrating disk 1 is located between the first mounting edge 213 and the third mounting edge 31. The first mounting edge 213, the third mounting edge 31 and the outer wall of the first outer shell 211 can form a groove, and the groove can cooperate with the upper and lower surfaces at the through hole 101 of the vibrating disk 1 to improve the installation stability of the first outer shell 211 and the vibrating disk 1, and such a setting is more conducive to transmitting the exciting force to the vibrating disk 1, further improving the controllability of the vibration amplitude and vibration frequency of the vibrating disk 1.

[0051] As Figure 7 and Figure 8As shown in the figure, a protective cover 4 is provided on the outer edge of the through hole 101 of the vibrating disk 1. The protective cover 4 is made of polyurethane material or manganese steel material. The vibrator 2 is located inside the protective cover 4, and there is a gap between the protective cover 4 and the vibrator 2. The protective cover 4 can prevent the ore raw materials from directly falling on the vibrator 2, and at the same time can also prevent the impact force from being transmitted to the vibrator 2, playing a protective role.

[0052] As Figure 8 and Figure 9 shown in the figure, in this embodiment, the protective cover 4 has an upper cover body 41 and a lower cover body 42. The lower cover body 42 is of a cylindrical structure. The lower cover body 42 is installed on the vibrating disk 1, and the upper cover body 41 is buckled on the lower cover body 42. The lower cover body 42 can support the upper cover body 41, so that there is a certain distance between the upper cover body 41 and the vibrating disk 1, and a protective cavity is formed in combination with the cylindrical structure of the lower cover body 42. The vibrator 2 is located inside the protective cavity. The surface of the upper cover body 41 is provided with a plurality of notches 411. The notches 411 have a certain depth but do not penetrate the upper cover body 41. Since the falling ore raw materials will continuously wear the upper cover body 41, the notches 411 on the upper cover body 41 can be used to indicate the wear degree of the upper cover body 41. When the notches 411 on the upper cover body 41 become shallower or disappear, the staff only needs to replace the upper cover body 41 without replacing the entire protective cover 4.

[0053] A plurality of grooves can be provided on the outer peripheral wall of the lower cover body 42, and a support wall is formed between two adjacent grooves, thereby reducing the weight of the lower cover body 42 and ensuring the impact resistance of the lower cover body 42.

[0054] As Figure 7 and Figure 10 shown in the figure, the present invention provides a ore dressing machine for a ring-shaped feeding structure, including the above-mentioned exciting device for a circular feeder, and further including: a frame 6.

[0055] The frame 6 is provided with a feed cylinder 7 for discharging materials. The exciting device is installed on the frame 6 through a bracket 5. The vibrating disk 1 is aligned with the feed cylinder 7 and is used to receive the materials from the feed cylinder 7. For example, after the ore raw materials pass through the feed cylinder 7, they will fall on the vibrating disk 1. The exciting force of the vibrator 2 drives the vibrating disk 1 to vibrate, so that the ore raw materials uniformly fall along the annular surface of the vibrating disk 1, facilitating the detection and impurity removal by the detection device and the impurity removal device below.

[0056] As Figure 11As shown, the lower surface of the vibrating disk 1 is connected to the bracket 5 through a plurality of elastic support columns 51. Then, when the vibrator 2 works, the vibrating disk 1 can vibrate relative to the bracket 5 through the elastic support columns 51, avoiding the transmission of the exciting force to the bracket 5. The elastic support columns 51 can be made of rubber or silica gel materials. The elastic support columns 51 have a hollow inner cavity, and a first fastener 52 and a second fastener 53 are respectively arranged at both ends of the hollow inner cavity. The first fastener 52 is connected to the vibrating disk 1, and the second fastener 53 is connected to the bracket 5 to ensure that the vibrating disk 1 can vibrate relative to the bracket 5. The structures of the first fastener 52 and the second fastener 53 are the same, and both include inserts that can be embedded in the hollow inner cavity and screws arranged on the inserts. The screws are used to be tightened on the corresponding threaded holes on the vibrating disk 1 or the bracket 5.

[0057] The elastic support columns 51 can also be replaced by rubber springs.

[0058] The bracket 5 can be installed on the frame 6 through a support frame 54. The support frame 54 has a plurality of support arms connected to the edge of the bracket 5, thereby ensuring that there is a certain gap between the edge of the vibrating disk 1 and the support frame 54, and the ore raw materials can fall from the gap for subsequent detection and impurity removal.

[0059] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An exciting device for an annular fabric structure, characterized in that, include: A vibration plate (1) having a through hole (101) at the center; A vibration exciter (2), comprising: A housing (21) is mounted on the through hole (101) and has an excitation cavity (201); A driving member (22) is arranged on the housing (21), wherein the extension direction of the output shaft (221) of the driving member (22) coincides with the center line of the vibration plate (1) and extends into the excitation cavity (201); An eccentric member (23) is arranged in the excitation cavity (201) and is drivingly connected to an output shaft (221) of the driving member (22); an axial limiting structure is provided between the eccentric member (23) and the housing (21); the axial limiting structure is used to prevent the eccentric member (23) from being displaced along an extension direction of the output shaft (221).

2. The excitation device according to claim 1, wherein A coupling (24) is provided at the output end of the driving member (22), and the eccentric member (23) is drivingly connected to the coupling (24) via an eccentric shaft (25).

3. The excitation device according to claim 2, characterized in that, The eccentric member (23) comprises: A clamping sleeve (231) is sleeved on the eccentric shaft (25) and fixedly connected thereto; The eccentric block (232) is integrally formed with the clamping sleeve (231), and the eccentric block (232) has an arc surface that is gap-matched with the inner wall of the excitation cavity (201).

4. The excitation device according to claim 3, characterized in that, The housing (21) comprises: A first shell (211), the outer wall of which is in contact with the through hole (101); a first mounting edge (213) is provided at the opening of the first shell (211); the first mounting edge (213) is fixedly connected to the vibration plate (1); A second shell (212), the outer wall of which is in contact with the inner wall of the opening of the first shell (211), the second shell (212) is provided with a second mounting edge (214), the second mounting edge (214) is fixedly connected to the first mounting edge (213), the excitation cavity (201) is formed between the first shell (211) and the second shell (212), the second shell (212) is provided with an axial hole (215), and the coupling (24) is located in the axial hole (215); The first housing (211) is provided with a first bearing (261), the second housing (212) is provided with a second bearing (262), and both ends of the eccentric shaft (25) are rotatably matched with the first bearing (261) and the second bearing (262), respectively; The axial limiting structure comprises a first annular boss (251) and a second annular boss (252) coaxially arranged on the eccentric shaft (25); in the extension direction of the eccentric shaft (25), the first bearing (261), the first annular boss (251), the clamping sleeve (231), the second annular boss (252) and the second bearing (262) are sequentially fitted together.

5. The exciting device according to claim 4, characterized in that, The first housing (211) has a first stepped hole (202), the second housing (212) has a second stepped hole (203), the second stepped hole (203) is coaxially arranged with the shaft hole (215) and is located at one end of the shaft hole (215) close to the excitation cavity (201), the first stepped hole (202) is coaxially arranged with the second stepped hole (203), the first bearing (261) is installed in the first stepped hole (202), and the second bearing (262) is installed in the second stepped hole (203).

6. The excitation device according to claim 5, characterized in that, A first limiting member (27) is arranged on the first housing (211), the shape of the first limiting member (27) is annular, the inner edge of the first limiting member (27) presses against the first bearing (261), a second limiting member (28) is arranged on the second housing (212), the shape of the second limiting member (28) is annular, and the inner edge of the second limiting member (28) presses against the second bearing (262).

7. The excitation device according to claim 6, characterized in that, A first stepped groove (204) is arranged on the first housing (211), the first limiting member (27) has a first annular protrusion adapted to the shape of the first stepped groove (204), a second stepped groove (205) is arranged on the second housing (212), and the second limiting member (28) has a second annular protrusion adapted to the shape of the second stepped groove (205).

8. The excitation device according to claim 4, characterized in that, A sleeve (3) is arranged on the outer side of the first housing (211), the inner wall of the sleeve (3) fits against the outer wall of the first housing (211), the sleeve (3) has a third mounting edge (31) adapted to the shape of the first mounting edge (213), and the vibrating disk (1) is located between the first mounting edge (213) and the third mounting edge (31).

9. The exciting device according to claim 1, characterized in that, A protective cover (4) is arranged on the outer edge of the through hole (101) of the vibrating disk (1), the exciter (2) is located inside the protective cover (4), and there is a gap between the protective cover (4) and the exciter (2).

10. A beneficiation machine for an annular cloth structure, characterized in that, Comprising the excitation device for a circular cloth distributor according to any one of claims 1 to 9, further comprising: A frame (6), the frame (6) is provided with a feed hopper (7) for discharging materials; The excitation device is installed on the frame (6) through a bracket (5), and the vibrating disk (1) faces the feed hopper (7) and is used for receiving materials from the feed hopper (7).

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