A flour mill

Abstract

This invention belongs to the technical field of grinding mills, specifically relating to a grinding mill, including a frame, a grinding assembly, and a power component. The grinding assembly includes a main shaft, a rotating shaft, a connecting rod, a grinding ring, and a grinding roller assembly. The grinding ring and the power component are fixed within the frame. The main shaft is rotatably mounted within the frame. The grinding roller assembly is located inside the grinding ring. The output end of the power component is connected to the main shaft for driving its rotation. A rotating shaft is rotatably fitted inside the main shaft, eccentrically positioned with its upper end extending beyond the main shaft. A connecting rod is fixedly connected to the upper end of the rotating shaft. The grinding roller assembly is rotatably mounted on the end of the connecting rod away from the rotating shaft, and a grinding roller is installed inside the grinding roller assembly. This invention, through the cooperation of the connecting rod and the rotating shaft, satisfies the oscillation requirements of the grinding roller during its revolution, thereby achieving centrifugal force to crush the material. It can effectively increase the size of the grinding roller within the inner region of the grinding ring, thus increasing the material thickness during grinding and improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of grinding mill technology, and specifically relates to a grinding mill. Background Technology

[0002] Current Raymond mills use multiple grinding rollers suspended on a perforated frame to revolve around the central axis of the mill body, while also rotating on their own axes. Due to centrifugal force during this revolution, the grinding rollers open outwards and press against the grinding ring. A shovel, connected to the perforated frame, rotates along with the frame and grinding rollers. The shovel is installed at an angle, with one shovel in front of each grinding roller to scoop up material, creating a flow. Under centrifugal force, the grinding rollers press tightly against the grinding ring, while the material scooped up by the shovel is fed between the grinding rollers and the grinding ring, where it is crushed into powder under the grinding pressure.

[0003] Because the main shaft of the plum blossom frame needs to transmit the torque output by the power mechanism to drive the grinding roller to rotate, its size cannot be too small. The central drive shaft needs to occupy a large space, which makes it impossible to make the grinding roller size large, affecting the crushing force and material thickness during grinding, and affecting the working efficiency of the mill. Summary of the Invention

[0004] This invention addresses the problem in existing Raymond mills where the size of the grinding rollers surrounding the grinding ring is limited due to the space occupied by the central spindle. It provides a grinding mill that, through the cooperation of connecting rods and rotating shafts, satisfies the oscillation requirements of the grinding rollers during revolution, thereby achieving centrifugal force to crush the material. This effectively increases the size of the grinding rollers within the inner region of the grinding ring, thereby increasing the material thickness during grinding, improving production efficiency, and reducing energy consumption per unit product.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A grinding mill includes a frame, a grinding assembly, and a power unit. The grinding assembly includes a main shaft, a rotating shaft, a connecting rod, a grinding ring, and a grinding roller assembly. The grinding ring and the power unit are both fixedly installed within the frame. The main shaft is rotatably installed within the frame. The grinding roller assembly is movably disposed inside the grinding ring. The output end of the power unit is connected to the main shaft for driving its rotation. A rotating shaft is rotatably sleeved within the main shaft. The rotating shaft is eccentrically positioned relative to the main shaft. One end of the rotating shaft extends out of the main shaft and is fixedly connected to a connecting rod. The end of the connecting rod furthest from the rotating shaft is rotatably mounted with the grinding roller assembly. A grinding roller is installed within the grinding roller assembly. Through the eccentrically mounted rotating shaft on the main shaft, the connecting rod fixedly connected above the rotating shaft, and the grinding roller assembly rotatably mounted on the connecting rod, the grinding roller is easily disassembled, replaced, or repaired while ensuring that the grinding roller crushes the material through centrifugal force.

[0007] Preferably, a counterweight assembly is provided on the upper side of the main shaft, which is opposite to the grinding roller assembly, and the counterweight assembly is used to achieve dynamic balance with the grinding roller assembly.

[0008] Preferably, the counterweight assembly includes a counterweight rod and counterweight blocks. A counterweight rod is fixedly installed at the upper end of the main shaft. The counterweight rod passes through the grinding ring and two counterweight blocks are fixedly installed on it. The two counterweight blocks are located on both sides of the grinding ring. By adjusting the mass of the two counterweight blocks, their centers of gravity are made to be opposite to the grinding roller and located on the same plane, thereby balancing the centrifugal force when the grinding roller revolves.

[0009] Preferably, the grinding roller assembly includes a first mounting member, a second mounting member, a third mounting member, and a fourth mounting member, all arranged sequentially from bottom to top and each having a C-shaped structure. The first and fourth mounting members are vertically aligned, as are the second and third mounting members. The opening directions of the first and fourth mounting members are opposite to those of the second and third mounting members. Grinding rollers are rotatably mounted inside each of the first, second, third, and fourth mounting members. The center of gravity of the grinding rollers mounted in the first and fourth mounting members is symmetrically arranged with the center of gravity of the grinding rollers mounted in the second and third mounting members. The symmetrical arrangement of the grinding rollers ensures the force balance of the grinding assembly working chamber and reduces the generation of harmful vibrations.

[0010] Preferably, the grinding components are configured as four and distributed circumferentially within the frame. The four grinding components form a parallelogram structure, and the rotation directions of two adjacent main shafts are opposite. The arrangement of multiple grinding roller components ensures the force balance during the operation of the grinding mill.

[0011] Preferably, the grinding components are configured as four and arranged in a straight line within the frame; the main shafts of the two grinding components at both ends rotate in the same direction, the main shafts of the two grinding components in the middle rotate in the same direction, and the main shafts of the two grinding components at both ends rotate in the opposite direction to those of the two grinding components in the middle; the two grinding components at the same end are symmetrically arranged; or the two grinding components at one end and the two grinding components at the other end are symmetrically arranged, and the rotating shafts of adjacent grinding components rotate in opposite directions. The arrangement of multiple grinding roller assemblies ensures the force balance during the operation of the grinding mill.

[0012] The beneficial effects of the present invention through the above technical solution are as follows:

[0013] 1. This invention drives the main shaft to rotate via a power component, which in turn drives the rotating shaft to revolve. The rotating shaft, through a connecting rod, drives the grinding roller to revolve. The connecting rod is designed so that the grinding roller, under the action of centrifugal force, presses outward against the grinding ring. As the grinding roller revolves and rotates, the material is crushed into powder under the grinding pressure of the grinding roller. This invention can effectively increase the size of the grinding roller in the inner area of ​​the grinding ring, thereby increasing the material thickness during grinding and improving production efficiency.

[0014] 2. This invention uses a connecting rod with two ends rotatably connected to the main shaft and the rotating grinding roller via a rotating shaft. While ensuring the grinding roller's revolution and rotation, the connecting rod provides a degree of freedom to utilize the centrifugal force generated during the grinding roller's revolution to crush the material. Simultaneously, the grinding roller is mounted on the connecting rod, ensuring effective material crushing while facilitating direct disassembly and maintenance from above. Furthermore, it eliminates the need to reserve space for disassembling and assembling the grinding roller, thus avoiding increased equipment footprint.

[0015] 3. By setting up a counterweight component and adjusting its mass, this invention maintains dynamic balance with the grinding roller assembly and main shaft component, ensuring that the resultant force and torque on the mill system are zero under ideal conditions. This reduces the generation of harmful vibrations and enables reliable operation even when only one grinding roller is installed in a single grinding ring cross-section. It effectively increases the size of the grinding roller in a single grinding ring. For materials with the same meshing angle, a larger volume and mass grinding roller can obtain greater crushing force and material thickness, thereby improving production efficiency and reducing energy consumption.

[0016] 4. The present invention uses multiple grinding rollers arranged vertically to offset the centrifugal force of other grinding rollers during their revolution. On the one hand, this satisfies the requirement that only a single grinding roller is installed in each grinding ring. On the other hand, this combination ensures that the resultant force and torque on the entire mill are zero, thereby reducing the generation of harmful vibrations during the operation of the grinding mill.

[0017] 5. This invention uses multiple grinding components in combination and adjusts the rotation direction of multiple grinding rollers during their revolution, so that the centrifugal forces generated by the multiple grinding rollers cancel each other out when the grinding mill is working, thereby reducing the generation of harmful vibrations.

[0018] 6. The present invention uses multiple buffer protrusions made of rubber material to transmit torque to achieve the rotation of the main shaft, thereby buffering and absorbing the vibration generated by the equipment when the grinding mill is working, reducing the impact of harmful vibration.

[0019] 7. This invention buffers and absorbs harmful vibrations generated during the operation of the grinding mill by setting a buffer sleeve between the main shaft and the frame, thereby reducing the impact of harmful vibrations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0023] Figure 4This is a schematic diagram of the structure of the present invention. Figure 4 .

[0024] Figure 5 This is a schematic diagram of the structure of the grinding roller assembly of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the buffer assembly of the present invention mounted on the connecting rod.

[0026] Figure 7 This is a schematic diagram of the structure of the counterweight component of the present invention during installation.

[0027] Figure 8 This is a schematic diagram of the grinding roller's revolution direction when the grinding assembly of the present invention is arranged in a parallelogram structure. Figure 1 .

[0028] Figure 9 A schematic diagram of the grinding roller's revolution direction when the grinding assembly is arranged in a parallelogram shape. Figure 2 .

[0029] Figure 10 This is a schematic diagram of the structure of the grinding assembly of the present invention when the grinding rollers are arranged in a straight line, showing the direction of their revolution. Figure 1 .

[0030] Figure 11 This is a schematic diagram of the structure of the grinding assembly of the present invention when the grinding rollers are arranged in a straight line, showing the direction of their revolution. Figure 2 .

[0031] Figure 12 This is a schematic diagram of the structure of the grinding assembly of the present invention when the grinding rollers are arranged in a straight line, showing the direction of their revolution. Figure 3 .

[0032] Figure 13 This is a schematic diagram of the structure of the grinding assembly of the present invention when the grinding rollers are arranged in a straight line, showing the direction of their revolution. Figure 4 .

[0033] Figure 14 Schematic diagram of the installation structure of the buffer sleeve of the present invention Figure 1 .

[0034] Figure 15 Schematic diagram of the installation structure of the buffer sleeve of the present invention Figure 2 .

[0035] The numbers in the attached diagram are as follows: 1 is the power component, 2 is the main shaft, 3 is the rotating shaft, 4 is the connecting rod, 5 is the grinding roller, 6 is the first mounting component, 7 is the second mounting component, 8 is the third mounting component, 9 is the fourth mounting component, 10 is the grinding roller, 11 is the buffer shaft, 12 is the buffer protrusion, and 13 is the buffer sleeve. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0037] like Figures 1-15 As shown, this embodiment provides a grinding mill, including a frame (not shown in the drawings), a grinding assembly, and a power component 1, as follows: Figure 1 As shown, the grinding assembly includes a main shaft 2, a rotating shaft 3, a connecting rod 4, a grinding ring 5, and a grinding roller assembly. The grinding ring 5 and the power component 1 are both fixedly installed inside the frame. Further, if needed, the power component 1 can also be located outside the frame. The main shaft 2 is rotatably installed inside the frame. The output end of the power component 1 is connected to the main shaft 2 for driving its rotation. The power component 1 is a motor or a motor with a reducer. The grinding roller assembly is movably installed inside the grinding ring 5 and cooperates with the grinding ring 5 to crush the material. The rotating shaft 3 is rotatably sleeved inside the main shaft 2, and the rotating shaft 3 is eccentrically positioned relative to the main shaft 2. One end of the main shaft 2 extends out and is fixedly connected to a connecting rod 4. A grinding roller assembly is rotatably mounted on the end of the connecting rod 4 away from the rotating shaft 3. A grinding roller 10 is installed inside the grinding roller assembly. Furthermore, the power component 1 drives the main shaft 2 to rotate, causing the rotating shaft 3 to revolve around the axis of the main shaft 2, which in turn causes the connecting rod 4 and the grinding roller 10 to revolve. As a result, the grinding roller 10 crushes the material inside the grinding ring 5 under the action of centrifugal force. It should be noted that since the rotating shaft 3 is rotatably mounted inside the main shaft 2 and the grinding roller 10 is rotatably mounted on the connecting rod 4, the degree of freedom of the grinding roller 10 is sufficient to allow it to move radially along the grinding ring 5 under the action of centrifugal force to crush the material together with the inside of the grinding ring 5.

[0038] Furthermore, since only one grinding roller 10 is installed inside the grinding ring 5, in order to balance the centrifugal force of the grinding roller 10's revolution:

[0039] In one possible implementation, a counterweight assembly is provided on the upper side of the main shaft 2, opposite to the grinding roller assembly. The counterweight assembly is used to achieve dynamic balance with the grinding roller assembly. The counterweight assembly includes a counterweight rod and a counterweight block (e.g., ...). Figure 6-7 As shown, Figure 6 This is a schematic diagram without counterweights installed. The counterweight rod is located on the right side of the grinding roller 10. Both are located inside the grinding ring 5 (not shown in this diagram). The upper end of the main shaft 2 is fixedly equipped with a counterweight rod. The counterweight rod passes through the grinding ring 5 and has two counterweights fixedly mounted on it. The two counterweights are located on both sides of the grinding ring. By adjusting the mass of the two counterweights, the center of gravity of the counterweight assembly is made to be opposite to the center of gravity of the grinding roller 10 and both are located on the same plane inside the grinding ring 5. This makes the centrifugal force of the counterweight assembly cancel out the centrifugal force of the grinding roller 10, reducing the generation of harmful vibrations.

[0040] As one possible implementation method, such as Figure 5As shown, the grinding roller assembly includes a first mounting member 6, a second mounting member 7, a third mounting member 8, and a fourth mounting member 9, all arranged sequentially from bottom to top and each having a C-shaped structure. The first mounting member 6 and the fourth mounting member 9 are vertically aligned, as are the second mounting member 7 and the third mounting member 8. The opening directions of the first mounting member 6 and the fourth mounting member 9 are opposite to the opening directions of the second mounting member 7 and the third mounting member 8. Grinding rollers 10 are rotatably mounted inside each of the first mounting member 6, the second mounting member 7, the third mounting member 8, and the fourth mounting member 9. The center of gravity of the grinding rollers 10 installed in the first mounting member 6 and the fourth mounting member 9 is symmetrically arranged with the center of gravity of the grinding rollers 10 installed in the second mounting member 7 and the third mounting member 8. This ensures that during operation, the centrifugal forces generated by the two centers of gravity are opposite in direction and equal in magnitude, thus canceling each other out and reducing the generation of harmful vibrations.

[0041] Furthermore, the second mounting component 7 and the third mounting component 8 can be configured as one, wherein the weight of the grinding roller 10 installed inside is sufficient to offset the centrifugal force generated by the weight of the two grinding rollers 10 above and below it.

[0042] In one possible implementation, the grinding components are configured as four and distributed circumferentially within the frame, forming a parallelogram structure. The rotation directions of adjacent main shafts 2 are opposite, as shown below. Figure 8-9 As shown in the figure, the direction of the arrow is the revolution direction of the grinding roller 10 of the corresponding grinding component. Thus, when the four grinding rollers 10 revolve, the centrifugal force cancels each other out, reducing the generation of harmful vibrations when the grinding mill is working.

[0043] In one possible implementation, the grinding components are configured as four and arranged in a straight line within the frame;

[0044] The main shafts 2 in the two grinding assemblies located at both ends rotate in the same direction; the main shafts 2 in the two grinding assemblies located in the middle rotate in the same direction; the main shafts 2 in the two grinding assemblies located at both ends rotate in the opposite direction to those in the two grinding assemblies located in the middle; the two grinding assemblies located at the same end are symmetrically arranged, thus... Figure 10-11 As shown, the centrifugal forces generated by the grinding rollers 10 at the two ends and the two grinding components in the middle are equal in magnitude and opposite in direction when they are working, thus canceling each other out and effectively reducing the generation of harmful vibrations and ensuring the dynamic balance of the entire grinding mill.

[0045] Furthermore, such as Figure 10-11 The aforementioned configuration can be adjusted so that the grinding components are set to three, with the grinding rollers 10 of the grinding components at both ends having the same mass, and the grinding roller 10 of the grinding component in the middle having twice the mass of the grinding rollers 10 of the grinding components at both ends.

[0046] Alternatively, two grinding components located at one end and two grinding components located at the other end can be arranged symmetrically, with the rotation directions of the shafts 2 of adjacent grinding components being opposite, such as... Figure 12-13 As shown, when the symmetrical grinding components are working, the centrifugal forces generated by their grinding rollers 10 are equal in magnitude and opposite in direction, thus canceling each other out and effectively reducing the generation of harmful vibrations, ensuring the dynamic balance of the entire grinding mill.

[0047] It should be noted that at this time, the four grinding rings 5 ​​can be located on the same plane and fixedly connected, or four circular abrasive spaces for the grinding roller assembly to work can be opened on the same plate.

[0048] Furthermore, each of the four grinding components is equipped with a power unit 1, which simultaneously drives the corresponding grinding rollers 10 to revolve at the same speed, or only one power unit 1 is provided, and multiple main shafts 2 can be meshed in pairs through gears.

[0049] The grinding mill also includes a buffer assembly to absorb the vibration generated during the operation of the grinding mill and ensure the stable operation of the grinding mill.

[0050] As one possible implementation method, such as Figure 2-4 As shown, the buffer assembly includes a buffer shaft 11 and multiple buffer protrusions 12 evenly distributed around the buffer shaft 11. The buffer protrusions 12 are rod-shaped structures made of rubber material. The main shaft 2 has a buffer cavity on its upper side that matches the buffer assembly and penetrates the upper end of the main shaft 2. The buffer assembly is set in the buffer cavity. The rotating shaft 3 is rotatably mounted on the buffer assembly. That is, as needed, the rotating shaft 3 can be rotatably set in the buffer shaft 11 or in the buffer protrusions 12. At this time, the output end of the power component 1 is fixedly connected to the buffer shaft 11. The power component 1 drives the buffer shaft 11 to rotate. The buffer shaft 11 drives the main shaft 2 to rotate through the multiple buffer protrusions 12. Thus, the buffer protrusions 12 simultaneously satisfy the functions of transmitting torque and buffering and absorbing harmful vibrations during the operation of the grinding mill.

[0051] As one possible implementation method, such as Figure 14-15 As shown, the main shaft 2 is rotatably connected to the frame via bearings, and the buffer assembly includes a buffer sleeve 13, which is fixedly sleeved on the outside of the bearing or on the outside of the main shaft 2. The buffer sleeve 13 absorbs the harmful vibrations generated during the operation of the grinding mill.

[0052] As one possible implementation method, such as Figure 6 As shown, the buffer assembly includes a buffer sleeve 13, and the connecting rod 4 includes a lower connecting rod and an upper connecting rod. The lower connecting rod and the upper connecting rod are fixedly connected by a pin. A buffer sleeve 13 is provided between the pin and the upper connecting rod. The buffer sleeve 13 absorbs the harmful vibrations generated during the operation of the grinding mill.

[0053] As one possible implementation method, such as Figure 6 As shown, the buffer assembly includes a buffer sleeve 13, and the grinding roller 10 includes a spindle and a grinding roller body sleeved on the spindle. A buffer sleeve 13 is provided between the spindle and the grinding roller body to absorb harmful vibrations generated during the operation of the grinding mill.

[0054] It should be noted that the above-mentioned buffer sleeve 13 can be installed individually, in combination, or all at once. The buffer sleeve 13 is a ring structure made of rubber material.

[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A grinding mill, characterized in that, The equipment includes a frame, a grinding assembly, and a power unit (1). The grinding assembly includes a main shaft (2), a rotating shaft (3), a connecting rod (4), a grinding ring (5), and a grinding roller assembly. The grinding ring (5) and the power unit (1) are both fixedly installed in the frame. The main shaft (2) is rotatably installed in the frame. The grinding roller assembly is movably installed inside the grinding ring (5). The output end of the power unit (1) is connected to the main shaft (2) for driving the main shaft (2) to rotate. The rotating shaft (3) is rotatably sleeved inside the main shaft (2). The rotating shaft (3) is eccentrically set with the main shaft (2). One end of the rotating shaft (3) extends out of the main shaft (2) and is fixedly connected to the connecting rod (4). The end of the connecting rod (4) away from the rotating shaft (3) is rotatably installed with the grinding roller assembly. The grinding roller assembly contains a grinding roller (10).

2. The grinding mill according to claim 1, characterized in that, The main shaft (2) is provided with a counterweight assembly on its upper side, which is opposite to the grinding roller assembly. The counterweight assembly is used to form a dynamic balance with the grinding roller assembly.

3. A grinding mill according to claim 2, characterized in that, The counterweight assembly includes a counterweight rod and counterweight blocks. A counterweight rod is fixedly installed at the upper end of the main shaft (2). The counterweight rod passes through the grinding ring (5) and two counterweight blocks are fixedly installed on it. The two counterweight blocks are located on both sides of the grinding ring.

4. A grinding mill according to claim 1, characterized in that, The grinding roller assembly includes a first mounting member (6), a second mounting member (7), a third mounting member (8), and a fourth mounting member (9) arranged sequentially from bottom to top, all of which are C-shaped structures. The first mounting member (6) and the fourth mounting member (9) are vertically aligned, and the second mounting member (7) and the third mounting member (8) are vertically aligned. The opening directions of the first mounting member (6) and the fourth mounting member (9) are opposite to the opening directions of the second mounting member (7) and the third mounting member (8). Grinding rollers (10) are rotatably installed in the first mounting member (6), the second mounting member (7), the third mounting member (8), and the fourth mounting member (9). The center of gravity of the grinding rollers (10) installed in the first mounting member (6) and the fourth mounting member (9) is symmetrically arranged with respect to the center of gravity of the grinding rollers (10) installed in the second mounting member (7) and the third mounting member (8).

5. A grinding mill according to claim 1, characterized in that, The grinding components are configured as four and distributed circumferentially within the frame. The four grinding components form a parallelogram structure, and the rotation directions of two adjacent main shafts (2) are opposite.

6. A grinding mill according to claim 1, characterized in that, The grinding components are configured as four and arranged in a straight line within the frame; The main shafts (2) in the two grinding components at both ends rotate in the same direction. The main shafts (2) in the two grinding components in the middle rotate in the same direction. The main shafts (2) in the two grinding components at both ends rotate in the opposite direction to the main shafts (2) in the two grinding components in the middle. The two grinding components at the same end are symmetrically arranged. Alternatively, two grinding components located at one end and two grinding components located at the other end may be symmetrically arranged, with the rotating shafts (2) of adjacent grinding components rotating in opposite directions.

Images