A damping mechanism for a ball mill
By designing damping springs and airbag assemblies on the ball mill, combined with triggering elements and pressurizing devices, dynamic adjustment of damping intensity was achieved, solving the problem that existing damping mechanisms could not adapt to changes in the vibration intensity of the cylinder, thus improving the damping effect and the service life of the ball mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN ZHIFENG PRECISION TECHNOLOGY CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-26
AI Technical Summary
Existing vibration damping mechanisms for ball mills cannot adapt to changes in the vibration intensity of the cylinder, resulting in poor damping performance when the vibration intensity varies over a wide range, which may damage the rotating connection between the cylinder and the support frame.
A vibration damping assembly including a damping spring and an airbag was designed. Through the cooperation of a trigger and a pressurization trigger device, the airbag is inflated and pressurized when the vibration intensity of the cylinder increases, and depressurized when necessary, so as to adjust the vibration damping intensity to adapt to the vibration changes of different parts of the cylinder.
It improves the overall vibration reduction effect of the vibration reduction mechanism, extends the service life of the ball mill, improves the adjustment efficiency and stability of the vibration reduction components, ensures that the vibration reduction springs do not fail due to excessive stretching and contraction, and prevents the rollers from detaching from the cylinder.
Smart Images
Figure CN224414236U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vibration damping mechanisms, specifically a vibration damping mechanism for ball mills. Background Technology
[0002] Ball mills are key equipment for further pulverizing materials after they have been crushed. This type of grinding mill uses a certain number of steel balls as grinding media inside its cylinder. It can be divided into dry grinding and wet grinding methods, and according to the discharge method, it can be divided into grate-type discharge and overflow-type discharge.
[0003] During the operation of a ball mill, changes in the rotational speed of the cylinder, the grinding media inside the cylinder, and the material crushing progress all affect the vibration intensity of the cylinder, and these changes can be quite significant. However, existing vibration damping mechanisms for ball mills can generally only dampen the cylinder within a fixed amplitude range. This means that the damping effect of the damping mechanism cannot adapt to changes in the cylinder's vibration intensity. When the cylinder's vibration intensity changes over a wide range, the damping mechanism may not be able to provide effective vibration damping support, leading to excessive stress and damage at the rotating connections between the cylinder's ends and the support frame.
[0004] The research objective of this utility model is to design a vibration damping mechanism for ball mills to address the problems existing in the prior art. Utility Model Content
[0005] To address the problems existing in the prior art, this utility model provides a vibration damping mechanism for ball mills, which can effectively solve the problems existing in the prior art.
[0006] The technical solution of this utility model is:
[0007] A vibration damping mechanism for a ball mill, comprising:
[0008] The base is located below the cylinder of the corresponding ball mill;
[0009] A plurality of vibration damping components are disposed on the base. Each vibration damping component includes rollers connected vertically, a vibration damping spring that extends vertically, and an airbag that extends vertically. The airbags are respectively connected to an exhaust device and an inflation device. The rollers roll against the outer wall of the cylinder. A follower plate is provided between the vibration damping springs and the airbags. A trigger is provided on one side of the follower plate. The base is provided with a plurality of pressure-increasing triggering devices located below the follower plate and corresponding to the triggers. The pressure-increasing triggering devices are used to trigger the inflation device to inflate the corresponding airbag. When the vibration intensity of the cylinder increases, causing the vertical extension stroke of the vibration damping spring to increase to the point that the trigger triggers the pressure-increasing triggering device, the corresponding inflation device inflates and pressurizes the airbag.
[0010] Furthermore, the cylinder extends forward and backward and is rotatably connected to support frames at both ends. A plurality of vibration damping components are arrayed below the cylinder. The vibration damping springs and airbags of the vibration damping components in the same row on the left and right are connected to the same follower plate. The rollers of the vibration damping components in the same row are supported by the elastic force of the vibration damping springs and airbags and roll against the outer wall of the cylinder and are distributed along the arc of the outer periphery of the cylinder. The base is provided with a plurality of limiting groove plates corresponding to the four corners of the follower plate and used to limit and guide the lifting and lowering of the follower plate. The pressurization triggering device is a sensing sensor provided on the side wall of the limiting groove plate.
[0011] Furthermore, the cylindrical sidewall is circumferentially arrayed with a plurality of bolts for bolting the liner plate inside the cylindrical body. The number of vibration damping components is set to twelve groups, with three groups on the left and right in the same row and four groups in the front and back in the same column. A plurality of rollers are located between the plurality of bolts. The central recess of the follower plate corresponds to the lower end of the vibration damping spring on the middle side. The central recess of the top of the base corresponds to the lower end of the airbag on the middle side. The rollers of the three groups of vibration damping components in the same row are supported by the elastic force of the same vibration damping spring and airbag and roll against the outer wall of the cylindrical body and are distributed along the outer circumference arc of the cylindrical body.
[0012] Furthermore, the side wall of the limiting groove plate is also provided with a voltage stabilizing triggering device located between the follower plate and the pressure boosting triggering device and corresponding to the triggering element.
[0013] Furthermore, the cylinder is divided by a filter plate to form a coarse grinding chamber and a fine grinding chamber that are connected front and back. The coarse grinding chamber is provided with a number of large grinding balls, and the fine grinding chamber is provided with a number of large grinding balls and a number of small grinding balls. The four sets of vibration damping components arranged in the same row front and back correspond to the coarse grinding chamber and the fine grinding chamber in pairs.
[0014] Furthermore, the upper and lower sides of the follower plate extend in opposite directions and are provided with an upper guide cylinder and a lower guide cylinder. Each vibration damping component also includes a lower cover body disposed on the base and slidably sleeved in the lower guide cylinder, and an upper cover body slidably sleeved in the upper guide cylinder. The airbag is disposed in the lower cover body and its upper and lower ends are respectively connected to the base and the follower plate. The vibration damping spring is disposed in the upper cover body and its upper and lower ends are respectively connected to the upper cover body and the follower plate. The roller is rotatably disposed on the top of the upper cover body.
[0015] Furthermore, the airbag is an air spring, the exhaust device is an exhaust one-way valve, the bottom of the airbag is provided with an inflation valve port connected to the inflation device and an exhaust valve port connected to the exhaust one-way valve, and both the inflation device and the exhaust one-way valve are located inside the base.
[0016] Therefore, the beneficial effects of this utility model are:
[0017] 1. By connecting the damping spring and the airbag in series, and through the cooperation between the trigger and the pressurization triggering device, when the vibration intensity of the cylinder increases, causing the damping spring to extend and retract to the point that the trigger triggers the pressurization triggering device, the corresponding inflation device inflates and pressurizes the airbag. After a certain period of time, the airbag is then vented back to its normal state through the exhaust device. This increases the support strength of the airbag when the vibration intensity of the cylinder increases, preventing the damping spring from over-extension and causing it to fail in its vibration damping support of the cylinder, or even causing the roller to detach directly from the cylinder. This achieves the adjustable effect of increasing the vibration damping intensity of several damping components as the vibration intensity of different parts of the cylinder increases, improving the overall vibration damping effect of the damping mechanism, and thus extending the service life of the ball mill.
[0018] 2. Due to the front-to-back extension of the cylinder, the material inside is gradually crushed from front to back, and the grinding media inside falls after rotating circumferentially. Therefore, the vibration intensity in the circumferential direction of the cylinder is similar. Thus, connecting the vibration damping components in the same row on the left and right sides through the same follower plate can achieve the effect that the vibration damping intensity of the vibration damping components changes with the local vibration intensity of the cylinder. Furthermore, the inflation of three airbags can be controlled by a single sensor, which improves the adjustment efficiency of the vibration damping intensity of the vibration damping components and saves costs. In addition, the setting of several limiting slot plates guides the lifting and lowering of the follower plate, which improves the stability of the vibration damping spring and airbag extension and contraction, as well as the lifting and lowering of the follower plate, thereby improving the overall stability of the vibration damping mechanism.
[0019] 3. The side wall of the limiting groove plate is also equipped with a pressure stabilizing trigger device located between the follower plate and the pressure boosting trigger device, corresponding to the trigger element. After the corresponding inflation device inflates and pressurizes the airbag, if the pressure stabilizing trigger device is not triggered for a long time, it is determined that the height of the follower plate is higher than the pressure stabilizing trigger device for a long time. The exhaust device is then controlled to vent and depressurize the airbag to the normal air pressure state. This ensures that the airbag is depressurized in time after the vibration intensity of the cylinder increases and then decreases, avoiding the situation where the airbag is kept in a high pressure state, which would reduce the extension space of the vibration damping spring and cause excessive rolling to push against the cylinder.
[0020] 4. The setting of coarse grinding chamber and fine grinding chamber further exacerbates the difference in vibration intensity between the front and rear sides of the cylinder. The vibration damping components corresponding to the coarse grinding chamber and fine grinding chamber respectively can adjust the vibration damping intensity according to the change in vibration intensity between the front and rear sides of the cylinder, thereby ensuring the vibration damping effect of the vibration damping mechanism while improving grinding efficiency. Attached Figure Description
[0021] Figure 1 This is a side view of the ball mill and vibration damping mechanism.
[0022] Figure 2 This is a three-dimensional structural diagram of the vibration damping mechanism.
[0023] Figure 3This is a three-dimensional structural diagram of the vibration damping components in the same row.
[0024] Figure 4 This is a cross-sectional structural diagram of the vibration damping components in the same row.
[0025] Figure 5 This is a cross-sectional view of a ball mill. Detailed Implementation
[0026] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:
[0027] refer to Figure 1-5 A vibration damping mechanism for a ball mill, comprising:
[0028] The base 1 is located below the corresponding ball mill cylinder 3;
[0029] A plurality of vibration damping components 2 are disposed on the base 1. Each vibration damping component 2 includes rollers 21 connected vertically, vibration damping springs 22 that extend vertically, and airbags 23 that extend vertically. The plurality of airbags 23 are respectively connected to an exhaust device (not shown in the figure) and an inflation device (not shown in the figure). The rollers 21 roll against the outer wall of the cylinder 3. A follower plate 24 is provided between the plurality of vibration damping springs 22 and the plurality of airbags 23. A trigger 25 is provided on one side of the follower plate 24. A plurality of pressure boosting triggering devices 11 are provided on the base 1, located below the follower plate 24 and corresponding to the plurality of triggering devices 25. The pressure boosting triggering devices 11 are used to trigger the inflation device to inflate the corresponding airbags 23.
[0030] The above structure, through the series connection of the damping spring 22 and the air bladder 23, and the cooperation between the trigger 25 and the pressurization triggering device 11, enables the air bladder 23 to be inflated and pressurized by the corresponding inflation device when the vibration intensity of the cylinder 3 increases, causing the damping spring 22 to extend and retract to the point that the trigger 25 triggers the pressurization triggering device 11. After a certain period of time, the air bladder 23 is then vented back to its normal state through the exhaust device. This increases the support strength of the air bladder 23 when the vibration intensity of the cylinder 3 increases, preventing the damping spring 22 from over-extension and causing it to fail in its vibration damping support of the cylinder 3, or even causing the roller 21 to detach directly from the cylinder 3. This achieves the adjustable effect of increasing the vibration damping intensity of several damping components 2 as the vibration intensity of different parts of the cylinder 3 increases, improving the overall vibration damping effect of the damping mechanism, and thus increasing the service life of the ball mill.
[0031] To improve the efficiency of vibration damping intensity adjustment of the vibration damping component 2, the cylinder 3 extends front and rear and is rotatably connected to the support frame 4 at both ends. A plurality of vibration damping components 2 are arrayed below the cylinder 3. The vibration damping springs 22 and airbags 23 of the vibration damping components 2 in the same row on the left and right are connected by the same follower plate 24. The rollers 21 of the vibration damping components 2 in the same row are supported by the elastic force of the vibration damping springs 22 and airbags 23 and roll against the outer wall of the cylinder 3 and are distributed along the outer circumference arc of the cylinder 3. The base 1 is provided with a plurality of limiting groove plates 12 corresponding to the four corners of the follower plate 24 and used to limit and guide the lifting and lowering of the follower plate 24. The pressurization triggering device 11 is a sensing sensor provided on the side wall of the limiting groove plate 12. Specifically, the sensing sensor can be a photoelectric sensor. Because the cylinder 3 extends front and back, the material inside is gradually crushed from front to back, and the grinding media inside falls after rotating around the circumference. Therefore, the vibration intensity of the cylinder 3 is similar in the circumference. Thus, the vibration damping components 2 in the same row on the left and right are connected by the same follower plate 24. Based on the fact that the vibration damping intensity of the vibration damping component 2 changes with the local vibration intensity of the cylinder 3, the inflation of the three air bags 23 is controlled by a sensor, which improves the adjustment efficiency of the vibration damping intensity of the vibration damping component 2 and saves costs. In addition, the setting of several limiting slot plates 12 guides the lifting and lowering of the follower plate 24, which improves the stability of the extension and contraction of the vibration damping spring 22 and the air bag 23 and the lifting and lowering of the follower plate 24, thereby improving the overall stability of the vibration damping mechanism.
[0032] To improve the practicality of the vibration damping mechanism, the side wall of the cylinder 3 is circumferentially arrayed with several bolts 31 for bolting the liner plates inside the cylinder 3. The number of vibration damping components 2 is set to twelve groups, with three groups on the left and right in the same row and four groups in the front and back in the same column. Several rollers 21 are located between several bolts 31. The central recess of the follower plate 24 corresponds to the lower end of the vibration damping spring 22 on the middle side, and the central recess of the top of the base 1 corresponds to the lower end of the airbag 23 on the middle side. Thus, by arranging a reasonable number and position of vibration damping components 2, the cylinder 3 can achieve a stable and variable vibration damping effect. Through the central recess of the follower plate 24 and the central recess of the top of the base 1, the rollers 21 of the three groups of vibration damping components 2 in the same row can be supported by the elastic force of the same vibration damping spring 22 and airbag 23 and roll against the outer wall of the cylinder 3 and distributed along the outer circumferential arc of the cylinder 3.
[0033] To improve the stability of the airbag 23, the side wall of the limiting groove plate 12 is also provided with a pressure stabilizing trigger device 13 located between the follower plate 24 and the pressure boosting trigger device 11 and corresponding to the trigger member 25. After the corresponding inflation device inflates and pressurizes the airbag 23, if the pressure stabilizing trigger device 13 is not triggered for a long time, it is determined that the height of the follower plate 24 is higher than the pressure stabilizing trigger device 13 for a long time, and the vibration intensity of the cylinder 3 decreases. The exhaust device is then controlled to vent and depressurize the airbag 23 to the normal air pressure state at which the pressure stabilizing trigger device 13 is triggered. This ensures that the airbag 23 is depressurized in time after the vibration intensity of the cylinder 3 increases and then decreases, avoiding the situation where the airbag 23 is kept in a high pressure state, which would reduce the extension space of the damping spring 22 and cause it to roll excessively and push against the cylinder 3. At the same time, it can ensure that the normal air pressure state of the airbag 23 is sufficient to provide stable vibration damping support for the damping spring 22.
[0034] To improve grinding efficiency, the cylinder 3 is divided by a filter plate 32 to form a coarse grinding chamber 33 and a fine grinding chamber 34 that are connected front and back. The coarse grinding chamber 33 contains several large grinding balls, and the fine grinding chamber 34 contains several large grinding balls and several small grinding balls. The four sets of vibration damping components 2 arranged in the same row front and back correspond to the coarse grinding chamber 33 and the fine grinding chamber 34 in pairs. The arrangement of the coarse grinding chamber 33 and the fine grinding chamber 34 further exacerbates the difference in vibration intensity between the front and back sides of the cylinder 3. The vibration damping components 2, which correspond to the coarse grinding chamber 33 and the fine grinding chamber 34 in pairs, can adjust their damping intensity according to the change in vibration intensity between the front and back sides of the cylinder 3, thereby ensuring the vibration damping effect of the damping mechanism while improving grinding efficiency.
[0035] To improve the overall stability of the vibration damping assembly, the upper guide cylinder 241 and the lower guide cylinder 242 extend oppositely on the upper and lower sides of the follower plate 24. Each vibration damping assembly 2 also includes a lower cover 26 mounted on the base 1 and slidably fitted inside the lower guide cylinder 242, and an upper cover 27 slidably fitted inside the upper guide cylinder 241. The airbag 23 is located inside the lower cover 26 and its upper and lower ends are respectively connected to the base 1 and the follower plate 24. The vibration damping spring 22 is located inside the upper cover 27 and its upper and lower ends are respectively connected to the upper cover 27 and the follower plate 24. The roller 21 is rotatably mounted on the top of the upper cover 27. Thus, through the cooperation between the upper cover 27 and the upper guide cylinder 241, and the lower cover 26 and the lower guide cylinder 242, the stability of the vertical extension and retraction of the vibration damping spring 22 and the airbag 23 is improved, thereby improving the overall stability of the vibration damping assembly 2.
[0036] Specifically, the airbag 23 is an air spring, the exhaust device is an exhaust one-way valve, and the bottom of the airbag 23 is provided with an inflation valve port 231 connected to the inflation device and an exhaust valve port 232 connected to the exhaust one-way valve. The inflation device and the exhaust one-way valve are both located inside the base 1. The exhaust one-way valve connects the exhaust valve port 232 to the outside and is used to exhaust air to the outside.
[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A damping mechanism for a ball mill, characterized in that include: The base (1) is located below the corresponding ball mill cylinder (3); A plurality of vibration damping components (2) are disposed on the base (1). Each vibration damping component (2) includes rollers (21) connected vertically, vibration damping springs (22) that extend vertically, and airbags (23) that extend vertically. The plurality of airbags (23) are respectively connected to an exhaust device and an inflation device. The rollers (21) roll against the outer wall of the cylinder (3). A follower plate (24) is provided between the plurality of vibration damping springs (22) and the plurality of airbags (23). A trigger element (25) is provided on one side of the follower plate (24). The base (1) is provided with several pressure-boosting triggering devices (11) located below the follower plate (24) and corresponding to several triggering elements (25). The pressure-boosting triggering device (11) is used to trigger the inflation device to inflate the corresponding airbag (23). When the vibration intensity of the cylinder (3) increases, the vertical extension and retraction stroke of the damping spring (22) increases to the point that the triggering element (25) triggers the pressure-boosting triggering device (11), the corresponding inflation device inflates and pressurizes the airbag (23).
2. A damping mechanism for a ball mill as claimed in claim 1, characterised in that, The cylinder (3) extends forward and backward and is rotatably connected to the support frame (4) at both ends. A plurality of vibration damping components (2) are arrayed below the cylinder (3). The vibration damping springs (22) and airbags (23) of the vibration damping components (2) in the same row on the left and right are connected by the same follower plate (24). The rollers (21) of the vibration damping components (2) in the same row are supported by the elastic force of the vibration damping springs (22) and airbags (23) and roll against the outer wall of the cylinder (3) and are distributed along the outer circumference arc of the cylinder (3). The base (1) is provided with a plurality of limiting groove plates (12) corresponding to the four corners of the follower plate (24) and used to limit and guide the lifting and lowering of the follower plate (24). The pressurization trigger device (11) is a sensing sensor provided on the side wall of the limiting groove plate (12).
3. A damping mechanism for a ball mill as claimed in claim 1, wherein, The side wall of the cylinder (3) is circumferentially arrayed with a plurality of bolts (31) for bolting the liner plate inside the cylinder (3). The number of the vibration damping components (2) is set to twelve groups, with three groups on the left and right in the same row and four groups in the front and back in the same column. A plurality of rollers (21) are located between a plurality of bolts (31). The middle of the follower plate (24) is recessed to correspond to the lower end of the vibration damping spring (22) on the middle side. The top of the base (1) is recessed to correspond to the lower end of the airbag (23) on the middle side. The rollers (21) of the three groups of vibration damping components (2) in the same row are supported by the elastic force of the same vibration damping spring (22) and airbag (23) and roll against the outer wall of the cylinder (3) and are distributed along the outer circumferential arc of the cylinder (3).
4. A damping mechanism for a ball mill as claimed in claim 2, wherein, The side wall of the limiting groove plate (12) is also provided with a voltage stabilizing triggering device (13) located between the follower plate (24) and the pressure boosting triggering device (11) and corresponding to the triggering element (25).
5. A damping mechanism for a ball mill as claimed in claim 3, wherein, The cylinder (3) is divided by the filter plate (32) to form a coarse grinding chamber (33) and a fine grinding chamber (34) that are connected front and back. The coarse grinding chamber (33) is provided with a number of large grinding balls, and the fine grinding chamber (34) is provided with a number of large grinding balls and a number of small grinding balls. The four sets of vibration damping components (2) arranged in the same row front and back correspond to the coarse grinding chamber (33) and the fine grinding chamber (34) in pairs.
6. A damping mechanism for a ball mill as claimed in claim 1, wherein, The upper and lower sides of the follower plate (24) are provided with an upper guide cylinder (241) and a lower guide cylinder (242) extending in opposite directions. Each vibration damping component (2) also includes a lower cover (26) disposed on the base (1) and slidably sleeved in the lower guide cylinder (242), and an upper cover (27) slidably sleeved in the upper guide cylinder (241). The airbag (23) is disposed in the lower cover (26) and its upper and lower ends are respectively connected to the base (1) and the follower plate (24). The vibration damping spring (22) is disposed in the upper cover (27) and its upper and lower ends are respectively connected to the upper cover (27) and the follower plate (24). The roller (21) is rotatably disposed on the top of the upper cover (27).
7. A damping mechanism for a ball mill as claimed in claim 1, wherein, The airbag (23) is an air spring, the exhaust device is an exhaust valve, the bottom of the airbag (23) is provided with an inflation valve port (231) connected to the inflation device and an exhaust valve port (232) connected to the exhaust valve, and the inflation device and the exhaust valve are both located in the base (1).