Electric vibrator for ore processing equipment

Abstract

A belt or chain driven vibrator for an ore processing device includes a vibrator shaft drive wheel (120) configured to be positioned at least partially radially around a bearing (102) of a vibrator shaft (104) that extends through an equipment frame (106) of the ore processing device, and an eccentric weight (110) configured to be attached to the vibrator shaft, the eccentric weight being mounted so as to be located on the far side of the vibrator shaft drive wheel in the axial direction of the vibrator shaft as viewed from the equipment frame. Also disclosed are a method (200) for vibrating an ore processing device with a belt or chain, a method (300) for manufacturing a belt or chain driven vibrator for an ore processing device, a method (400) for controlling a belt or chain driven vibrator for an ore processing device, and a mobile ore processing plant including a vibrator for an ore processing device.

Description

[Technical Field]

[0001] The present disclosure (hereinafter the present disclosure) generally relates to belt or chain driven vibrators for ore processing equipment.

[0002] It should be noted that this section provides useful background information, but does not constitute an admission that the techniques described therein represent the state of the art.

[0003] Vibrators are used to vibrate various ore processing equipment, such as screens, for ore processing. For example, a screen vibrator is used to shake one or more screen media of a screen. By shaking the screen, undersized debris falls through the screen media and oversized debris is carried by the screen media. Vibrators may also be provided to aid material transport through feeders or conveyors.

[0004] The vibrator is typically driven by a rotary drive that rotates an eccentric weight system, and vibration is induced by the inertia of the eccentric weight system. The eccentric weight system includes one or more eccentric weights. Symmetric excitation about the centerline of the screen is desirable. For example, a shaft may pass through both sides of the screen frame and support one or more eccentric weights. The eccentric weights may be located between opposing sides of the screen frame. Alternatively, or in addition, multiple eccentric weights may sandwich the screen frame outside the screen frame. Placing the eccentric weights outside the screen frame can reduce the space required inside the screen and increase the excitation force depending on the eccentricity of the eccentric weights.

[0005] When driving a shaft supporting an eccentric weight outside the screen frame, the weight is typically supported on the shaft very close to the screen frame to reduce adverse forces applied to the shaft bearings. The closer the eccentric weight is to the screen frame, the less thickness of the shaft is required to provide sufficient rigidity. Since the goal is to vibrate the screen media, increasing the system's mass would reduce vibration acceleration and be counterproductive. Therefore, it is logical to place the eccentric weight very close to the screen frame and the drive pulley behind the eccentric weight. However, when the eccentric weight is driven by an electric motor, the electric motor is longer than the eccentric weight and drive pulley combination, so the screen drive system can increase the screen width. If the electric motor extends axially, offset radially from the height of the drive pulley, the motor must be mounted away from the screen frame by the axial length of the eccentric weight. On the other hand, mounting the motor backwards can impede airflow to the rear end of the motor, which can hinder motor cooling. In order to align the drive pulley with the motor, the shaft must be extended.

[0006] It is desirable to develop new improvements or alternatives that will make the drive system of the screen vibrator more compact or allow for replacement.

[0007] The scope of protection is defined by the appended claims. Any examples or technical descriptions of devices, products and / or methods in the description and / or drawings of this specification that are not covered by the claims are presented as background or examples that are helpful in understanding the present invention, and are not presented as embodiments of the present invention.

[0008] According to a first exemplary aspect, there is provided a belt or chain driven vibrator for an ore processing device, the vibrator comprising: a vibrator shaft drive wheel configured to be positioned at least partially radially around a bearing of a vibrator shaft that extends through an equipment frame of the ore processing device; an eccentric weight configured to be attached to the vibration exciter shaft; However, the eccentric weight is attached to the vibration exciter shaft so as to be located on the other side of the vibration exciter shaft drive wheel when viewed from the screen frame in the axial direction of the vibration exciter shaft.

[0009] The drive wheel may be a belt pulley or a chain sprocket.

[0010] The bearing may comprise a bearing case. The bearing may comprise a plurality of rollers or balls. The vibration exciter shaft drive wheel may be configured to lie at least partially radially around the bearing case. The vibration exciter shaft drive wheel may be configured to lie at least partially radially around the rollers or balls of the bearing.

[0011] Advantageously, locating the vibration exciter shaft drive wheel at least partially around the bearing allows the vibration exciter shaft drive wheel and the eccentric mass to be closer to the machine frame, which may result in reduced eccentric loads on the bearing.

[0012] The vibrator shaft drive wheel may include two peripheral flanges that define a belt groove. The belt groove may be located axially between the screen frame and the center of mass of the eccentric weight. The belt groove may be located axially closer to the screen frame than the center of mass of the eccentric weight.

[0013] The vibrator may be belt-driven. The belt groove may be adapted for a multi-rib belt. The belt groove may be adapted for a two-rib belt. The two peripheral flanges may extend radially from a cylindrical portion. The cylindrical portion may be flush with the inner one of the two peripheral flanges. The two peripheral flanges may be attached to the cylindrical portion by, for example, welding. The cylindrical portion may be longer than the width occupied by the two peripheral flanges and the belt groove, and may extend outward from the outer one of the two peripheral flanges. The vibrator may further include a belt. The vibrator may include two belts. Two belts allow for the use of reasonably priced, inexpensive belts even if the axial space of the vibrator shaft is limited. The vibrator may include three belts. Three belts allow for the use of less expensive belts and an extended belt life while maintaining a reasonable total axial space. The vibrator may include four belts. Even with four belts, the required axial space can be maintained within the vibration exciter shaft bearing tolerance, taking into account the centrifugal force generated by the eccentric weight. Four belts allow operation to continue even if one of the belts fails. The vibration exciter may have one to four belts. Alternatively, the vibration exciter may be chain-driven. The vibration exciter may have a chain. Alternatively, the vibration exciter may have two or three chains. Two or three chains are advantageous because they increase redundancy, reduce chain strength requirements, and / or allow the vibration exciter to operate even if one of the chains fails, thereby reducing interruptions to the operation of the ore processing equipment.

[0014] The ore processing device may be a screen, a feeder, a conveyor, or the like.

[0015] The vibration exciter shaft drive wheel may be integral with the eccentric weight. The vibration exciter shaft drive wheel may be connectable to the eccentric weight. The eccentric weight may be recessed to at least partially receive an outer side of the vibration exciter shaft drive wheel. The eccentric weight may include a recess configured to radially align the vibration exciter shaft drive wheel with the eccentric weight. The recess may be semicircular. The recess may allow the eccentric weight to be closer to the apparatus frame.

[0016] Locating the eccentric weight closer to the equipment frame may be particularly useful for multi-rib belts, which require more width than single-rib belts.

[0017] The eccentric mass may comprise a shaft mounting structure, the shaft mounting structure may comprise a clamp configured to mount the eccentric mass to the vibration exciter shaft, and the shaft mounting structure may couple the vibration exciter shaft drive wheel to the vibration exciter shaft.

[0018] The eccentric weight may comprise a semicircular plate portion. The plate portion may have a recess. The plate portion may integrally form a shaft mounting structure. The eccentric weight may comprise an arc portion. The arc portion may be attached to the plate portion. The arc portion may be semicircular. The arc portion and the plate portion may be radially aligned. The arc portion may be integrally formed with the plate portion.

[0019] The eccentric mass may be mounted such that its centrifugal force vector is formed at a distance close to the bearing point of the bearing. The close distance may be up to 115 mm. The close distance may be up to 110 mm. The close distance may be at least 108 mm. The close distance may be at least 110 mm.

[0020] The ore processing equipment vibrator may further include a cradle for an electric motor. The cradle may be mountable to the equipment frame. The cradle may be made of a metal plate. The metal may be, or may be made of, steel, aluminum, or an alloy of different metals. The cradle may be mountable to the outside of the equipment frame. The cradle may be mountable to the equipment frame by bolts, rivets, or welding. The cradle may define at least a portion of a drive wheel case. The cradle may include a drive wheel clamping mechanism. The drive wheel clamping mechanism may include a motor mounting plate. The motor mounting plate may be a slidable or rotatable connector configured to couple the motor mounting plate to a complementary structure defined by the cradle. The cradle may include a belt tensioner. The belt tensioner may include a rotatable tension adjustment element. The cradle may include a chain tensioner. The chain tensioner may include a rotatable tension adjustment element. The rotatable tension adjustment element may be threaded. The complementary structure may be defined by the drive wheel case. The cradle is configured to mount the electric motor from a front end thereof, through which rotational drive is provided by the electric motor. The cradle may be configured to mount the electric motor to the equipment frame such that the electric motor shaft is spaced from the equipment frame by a motor gap. The motor gap may be at least 1 mm, 2 mm, 5 mm, or 10 mm. The motor gap may be at most 2 mm, 5 mm, 10 mm, 20 mm, or 40 mm. The motor may have a motor shaft. The motor shaft may drive the vibration exciter by a belt. The motor shaft may drive the vibration exciter by a chain. The motor shaft may extend axially beyond the bearing.

[0021] The ore processing device shaker may fit within a transport width defined by other parts of the ore processing device.

[0022] The vibration exciter may include a vibration exciter shaft. The belt or chain driven vibration exciter may further include a second eccentric mass. The second eccentric mass may be configured to be attached to opposite ends of the vibration exciter shaft. The vibration exciter may include two eccentric masses configured to operate on opposite sides of the apparatus frame. The two eccentric masses may be identical. The two eccentric masses may be mountable at the same distance from the apparatus frame. The second eccentric mass may be mountable closer to the apparatus frame than the first eccentric mass. The vibration exciter shaft drive wheel may be configured to drive the first eccentric mass via an interlink connecting the vibration exciter shaft drive wheel and the first eccentric mass. The vibration exciter shaft drive wheel may be configured to drive the second eccentric mass via the vibration exciter shaft.

[0023] According to a second exemplary aspect, there is provided a method for vibrating an ore processing device by a belt or chain, the method comprising: supporting a vibrator shaft drive wheel at least partially radially around a bearing of a vibrator shaft passing through an equipment frame of the ore processing apparatus; supporting an eccentric weight on the vibration exciter shaft, the eccentric weight being supported axially of the vibration exciter shaft and positioned beyond the vibration exciter shaft drive wheel as viewed from the machine frame; rotating the eccentric weight with the vibration exciter shaft drive wheel; Includes:

[0024] The method may include coupling the vibration exciter shaft drive wheel and the eccentric mass such that the vibration exciter shaft drive wheel and the eccentric mass are at least partially intertwined.

[0025] According to a third exemplary aspect, there is provided a method of manufacturing a vibrator for an ore processing device, the method comprising: mounting a vibrator shaft drive wheel at least partially radially around a bearing of the vibrator shaft passing through an equipment frame of the ore processing device; attaching an eccentric weight to the vibration exciter shaft such that the eccentric weight is axially positioned on the far side of the vibration exciter shaft drive wheel from the machine frame; Includes:

[0026] According to a fourth exemplary aspect, there is provided a method of controlling a vibrator for an ore processing device, the method comprising: Measuring the velocity of the vibration exciter or obtaining a current drive target for the vibration exciter; controlling the driving of the vibration exciter based on at least one of the measured velocity or the obtained drive target; Includes:

[0027] The drive control may include adjusting the power or speed of a motor that drives the vibration exciter. The drive control may include switching on the motor that drives the vibration exciter. The drive control may include switching off the motor that drives the vibration exciter.

[0028] According to a fifth exemplary aspect, there is provided an ore processing apparatus including a vibrator for an ore processing apparatus.

[0029] According to a sixth exemplary aspect, there is provided a screen with a (belt or chain driven) vibrator for an ore processing device.

[0030] According to a seventh exemplary aspect, there is provided a mobile ore processing plant including a vibration exciter for an ore processing device.

[0031] The ore processing plant may be mobile, self-propelled, or towed.

[0032] Although various aspects and embodiments have been introduced, they are not presented to limit the scope of the invention. These embodiments are merely used to illustrate specific aspects and steps that may be used in various implementations. Some embodiments may be presented only with reference to specific exemplary aspects. It should be understood that corresponding embodiments are also applicable to other aspects. [Brief explanation of the drawings]

[0033] Some embodiments will now be described with reference to the accompanying drawings, in which: [Figure 1A] 1 illustrates a schematic view of a belt-driven shaker for an ore processing device in accordance with an exemplary embodiment; [Figure 1B] 1 illustrates a schematic diagram of a belt-driven shaker for an ore processing device from another perspective, in accordance with an exemplary embodiment; [Figure 1C] 1 is an illustration of a cross section of an eccentric weight in accordance with an illustrative embodiment; [Figure 2] 1 is a block diagram of a method for vibrating an ore processing device by a belt or chain, according to an embodiment. [Figure 3] FIG. 1 is a block diagram of a method for manufacturing a belt or chain driven shaker for an ore processing device, according to an embodiment. [Figure 4] FIG. 1 is a block diagram of a method for controlling a belt-driven or chain-driven shaker for an ore processing machine, according to an embodiment. [Figure 5] 1 illustrates a schematic diagram of a system according to an embodiment. Detailed explanation

[0034] In the following description, like numbers refer to like elements or steps.

[0035] 1A and 1B show a belt-driven vibration exciter 100 for an ore processing device. FIGS. 1A and 1B show the same belt-driven vibration exciter for an ore processing device from two different perspectives. The belt-driven vibration exciter 100 for an ore processing device includes an eccentric weight 110 and a vibration exciter shaft drive wheel 120. In the example embodiment of FIGS. 1A and 1B, the vibration exciter shaft drive wheel 120 is a vibration exciter shaft pulley. The vibration exciter 100 includes a vibration exciter shaft 102 and a bearing 102 that rotatably supports the vibration exciter shaft. The vibration exciter shaft 102 supports the eccentric weight 110 and the vibration exciter shaft drive wheel 120. The vibration exciter shaft drive wheel 120 is configured to be at least partially positioned radially around the bearing 102. The vibration exciter shaft 104 passes through a screen frame 106. In another embodiment (not shown), the screen vibrator is chain driven and the vibrator shaft drive wheel 120 is a chain sprocket.

[0036] The eccentric weight 110 is configured to be attached to the vibration exciter shaft 104. The eccentric weight 110 is located on the other side of the vibration exciter shaft drive wheel 120 as viewed from the screen frame 106 in the axial direction of the vibration exciter shaft 104. The center of a drive medium (belt, chain) of the vibration exciter shaft drive wheel 120 is configured to be located closer to the screen frame 106 than the center of mass of the eccentric weight 110 in the axial direction of the vibration exciter shaft 104. The vibration exciter shaft drive wheel 120 is attached to the eccentric weight 110.

[0037] In some embodiments, the bearing 102 comprises a bearing case. In some embodiments, the vibration exciter shaft drive wheel 120 is configured to reside at least partially radially around the bearing case.

[0038] The vibrator shaft drive wheel 120 includes a cylindrical portion 122 and two peripheral flanges 124 (FIG. 1B). The two peripheral flanges 124 define a belt groove therebetween. In an exemplary embodiment, the belt groove is configured to be located between the screen frame 106 and the eccentric weight 110. In an exemplary embodiment, the belt groove is configured to be located closer to the screen frame 106 than the eccentric weight 110 (the weight portion of the eccentric weight). In other words, the eccentric weight of the vibrator 100 may be configured to be located outside the belt groove in the axial direction of the vibrator shaft 104, as viewed from the screen frame 106, in order to induce vibrations with its entire mass.

[0039] The belt groove is adapted for a two-rib belt. A two-rib belt requires more axial space than a one-rib belt, but is more durable and stronger. Due to the increased axial space required, the vibration exciter 100 shown in FIGS. 1A and 1B is particularly advantageous for positioning the center of mass of the eccentric weight 110 closer to the bearing 102. Alternatively, the vibration exciter may include one belt. The vibration exciter may include two belts. The vibration exciter may include three belts. The vibration exciter may include four belts. The vibration exciter may include one to four belts. The vibration exciter may be chain-driven. The vibration exciter may include a chain. If multiple chains are used to drive the vibration exciter, the vibration exciter may include multiple chains.

[0040] The eccentric weight 110 includes a semicircular plate portion 112 and an arc portion 114, which are either joined or integral with one another. In an exemplary embodiment, the plate portion 112 defines a recess 118. In FIG. 1A, the plate portion 112 integrally forms a shaft mounting structure. The arc portion 114 is joined to the plate portion 112. In FIG. 1A, the arc portion 114 is semicircular. The arc portion 114 and the plate portion 112 are radially aligned.

[0041] 1B also shows that the eccentric mass 110 defines a recess 118, which is shown in FIG. 1B with additional dashed lines for clarity. The recess 118 is configured to radially align the vibration exciter shaft drive wheel 120 with the eccentric mass 110. The recess 118 is semicircular. The recess further allows the eccentric mass 110 to be closer to the screen frame 106.

[0042] FIG. 1C shows a cross section of cylindrical portion 122 partially disposed in a recess in arcuate portion 114 of the eccentric weight.

[0043] In an exemplary embodiment, the eccentric mass 110 has a shaft mounting structure, such as a clamp 116. The clamp 116 is configured to mount the eccentric mass 110 to the vibration exciter shaft 104. The shaft mounting structure also couples a vibration exciter shaft drive wheel 120 to the vibration exciter shaft 104.

[0044] In an exemplary embodiment, the vibration exciter 100 further includes a cradle 130 for the electric motor 140. The cradle 130 is attached to the outside of the screen frame 106, for example by bolts. In FIG. 1A, the cradle 130 defines a portion of the drive wheel case. The electric motor 140 is attached to the cradle 130 by its front end, through which the electric motor 140 provides rotational drive. The cradle 130 mounts the electric motor 140 to the screen frame 106 such that the shaft of the electric motor 140 is spaced from the screen frame 106 by a motor gap (not shown). In FIG. 1A, the cradle 130 includes a pulley clamping mechanism implemented using two pulley clamping devices 132. In FIG. 1A, the pulley clamping mechanism further includes a motor mounting plate 134. In FIG. 1A, the motor mounting plate 134 slidably mounts the electric motor 140 to the opposing surface provided by the cradle 130. In the exemplary embodiment, motor mounting plate 134 includes a pivot attachment configured to pivotally mount electric motor 140 to the opposing surface, which may be defined by a pulley case.

[0045] In one exemplary embodiment, the cradle includes a belt tensioner. In one exemplary embodiment, the belt tensioner includes a rotatable tensioning element, which may be threaded. In another embodiment (not shown), the cradle includes a chain tightening mechanism. In a further alternative, the chain tensioner includes a rotatable tensioning element, which may be threaded.

[0046] The motor may include a motor shaft (not shown). The motor shaft may drive the eccentric weight 110 by a belt. Alternatively, the motor may drive the eccentric weight 110 by a chain. The motor shaft may have an axial length that extends beyond the bearing 102.

[0047] FIG. 2 is a block diagram of a method 200 for vibrating an ore processing device with a belt. The ore processing device may be a screen, a feeder, or a conveyor. In another embodiment, the ore processing device is vibrated with a chain. The method 200 includes a first step 210 of at least partially radially supporting a vibrator shaft drive wheel around a bearing of a vibrator shaft that penetrates an equipment frame of the ore processing device, and a second step 220 of supporting an eccentric weight on the vibrator shaft, where the eccentric weight is supported in the axial direction of the vibrator shaft so as to be located beyond the vibrator shaft drive wheel as viewed from the equipment frame. The method 200 may also include a step 230 of coupling the vibrator shaft drive wheel and the eccentric weight so that the vibrator shaft drive wheel and the eccentric weight are at least partially interlocked. Finally, the method 200 includes the step 240 of rotating the eccentric mass with the vibration exciter shaft drive wheel.

[0048] 3 is a block diagram of a method 300 of manufacturing a belt or chain driven vibrator for an ore processing machine. The method 300 comprises a first step 310 of mounting a vibrator shaft drive wheel at least partially radially around a bearing of a vibrator shaft that passes through an equipment frame of the ore processing machine. Finally, the method 300 comprises a step 320 of mounting an eccentric weight on the vibrator shaft, where the eccentric weight is mounted axially of the vibrator shaft on the far side of the equipment frame from the vibrator shaft drive wheel.

[0049] 4 is a block diagram of a method 400 for controlling a belt or chain driven vibrator for an ore processing device. The method 400 includes a first step 410 of measuring the vibrator speed or a first step 411 of obtaining a current drive target for the vibrator. The method 400 also includes a second step 420 of controlling a drive of the belt or chain driven vibrator for the ore processing device based on at least one of the measured vibrator speeds, or alternatively, a second step 421 of controlling the drive of the vibrator based on the current drive target obtained in the first step 411. Finally, the method 400 may include either a step 430 of adjusting the power or speed of a motor driving the vibrator, a step 431 of switching on the motor driving the vibrator, or a step 432 of switching off the motor driving the vibrator.

[0050] 5 shows a system according to one embodiment. The system includes a mobile ore processing plant 500 including an ore screen 510 and a belt-driven screen vibrator 100. The ore processing plant 500 may be self-propelled. The ore processing plant 500 may be towable. The belt-driven screen vibrator 100 can vibrate the screen 510.

[0051] Without limiting the scope and interpretation of the claimed invention, one or more technical effects of the exemplary embodiments disclosed herein are listed below: The technical effect is a reduced conveying width and space saving of the ore processing device due to the vibrator shaft drive wheel being configured to at least partially radially surround the bearing of the vibrator shaft. Some embodiments have another technical effect of a lighter and more compact design compared to prior art solutions. Some embodiments have another technical effect of reducing dynamic forces generated on the bearing during operation of the ore processing device under vibration. Some embodiments have yet another technical effect of reducing eccentric loads on the bearing. Some embodiments have yet another technical effect of reducing complexity and / or manufacturing costs.

[0052] Various embodiments have been described. The terms "comprises", "has", "comprises" and "includes" are to be interpreted in an open-ended manner and do not exclude the presence of other elements.

[0053] The above description provides a complete and informative description of the best modes for carrying out the invention currently contemplated by the inventors, using non-limiting examples of specific implementations and embodiments. However, as will be apparent to those skilled in the art, the details of the above-described embodiments do not limit the invention, and other embodiments may be implemented using equivalent means or combinations of various embodiments without departing from the features of the invention. Moreover, features of the exemplary embodiments disclosed above may be employed without the corresponding use of other features. Accordingly, the foregoing description should be considered merely as an example for illustrating the principles of the invention, and not as a limitation thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A vibration exciter for an ore processing device, comprising: a vibrator shaft drive wheel configured to be positioned at least partially radially around a bearing of a vibrator shaft that passes through an equipment frame of the ore processing device; an eccentric weight configured to be attached to the vibration exciter shaft; wherein the eccentric weight is attached to the exciter shaft such that the eccentric weight is located on the far side of the exciter shaft drive wheel in the axial direction of the exciter shaft as viewed from the screen frame.

2. 2. The vibration exciter of claim 1, wherein the drive wheel is a belt pulley or a chain sprocket.

3. 10. A vibration exciter according to any one of the preceding claims, wherein the bearing comprises a bearing case.

4. 10. A vibration exciter according to any one of the preceding claims, wherein the eccentric mass comprises a recess configured to radially align the vibration exciter shaft pulley with the eccentric mass.

5. 10. The vibration exciter of any one of the preceding claims, wherein the vibration exciter shaft pulley has a cylindrical portion and two peripheral flanges, the two peripheral flanges being supported on the cylindrical portion and configured to define a belt groove.

6. 10. A vibrator according to any one of the preceding claims, wherein the device is a screen, a feeder and / or a conveyor.

7. 10. A vibration exciter according to any one of the preceding claims, wherein the eccentric weight comprises a semi-circular plate portion.

8. 10. A vibration exciter according to any one of the preceding claims, wherein the eccentric weight comprises an arcuate portion.

9. 10. A vibration exciter according to any one of the preceding claims, wherein the eccentric mass comprises a shaft mounting structure.

10. 10. A vibration exciter according to any one of the preceding claims, wherein the eccentric mass is mounted such that its centrifugal force vector is formed at a distance close to a bearing point of the bearing, the close distance being at most 115 mm.

11. 1. A method for vibrating an ore processing device by a belt or chain, comprising: supporting a vibrator shaft drive wheel at least partially radially around a bearing of a vibrator shaft passing through an equipment frame of the ore processing apparatus; supporting an eccentric weight on the vibration exciter shaft, the eccentric weight being supported so as to be located on the far side of the vibration exciter shaft drive wheel in an axial direction of the vibration exciter shaft as viewed from the apparatus frame; rotating the eccentric weight with the vibration exciter shaft drive wheel; A method comprising:

12. 1. A method of manufacturing a belt or chain driven vibrator for an ore processing device, comprising: Mounting a vibrator shaft drive wheel at least partially radially around a bearing of the vibrator shaft that passes through an equipment frame of the ore processing device; attaching an eccentric weight to the vibration exciter shaft such that the eccentric weight is axially positioned on the other side of the vibration exciter shaft drive wheel from the screen frame; A method comprising:

13. 1. A method for controlling a belt or chain driven screen vibrator for an ore processing device, comprising: Measuring the speed of the belt or chain driven screen vibrator or obtaining a current drive target for the belt or chain driven screen vibrator; controlling the drive of the belt or chain driven screen vibrator based on at least one of the measured speeds of the belt or chain driven screen vibrator; or controlling the drive of the belt or chain driven screen vibrator based on the obtained current drive target of the belt or chain driven screen vibrator; and performing at least one of the following: A method comprising:

14. An ore processing device comprising the vibrator according to any one of claims 1 to 10.

15. A mobile ore processing plant comprising the vibrator according to any one of claims 1 to 10.

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