Coal mill roller disc type grinding component linkage device capable of adjusting grinding gap in variable frequency mode

Abstract

The invention relates to the field of coal mills, and discloses a coal mill roller disc type grinding component linkage device capable of adjusting grinding gaps in a variable frequency mode, the coal mill roller disc type grinding component linkage device comprises a coal mill body, a separator and a base, the separator is installed on the upper side of the coal mill body, the base is installed at the bottom of the coal mill body, and a coal milling part is arranged in the coal mill body and comprises a hydraulic cylinder; the hydraulic cylinders uniformly surround the periphery of the base, the piston rods are installed on the upper sides of the hydraulic cylinders, the support is fixedly installed on the tops of the piston rods, the wheel carrier is fixedly installed in the middle of the support, and the rolling wheels are installed in the wheel carrier. A motor is arranged in the base. A rotating shaft is fixedly installed on a motor shaft of the motor. A sliding barrel is arranged on the upper side of the rotating shaft; and three groups of second gears sleeve the surface of the sliding barrel. The rotating speed of the grinding disc is changed by changing the diameter of the gear, so that the grinding speed of pulverized coal can be controlled according to different grinding amounts, and the grinding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mills, and in particular to a linkage device for a coal mill roller grinding component that allows for variable frequency adjustment of the grinding gap. Background Technology

[0002] In the coal powder preparation process, the real-time and precise adjustment of the grinding gap in roller mills is crucial to ensuring pulverization efficiency and product quality. Traditional equipment generally uses mechanical gap adjustment mechanisms, which suffer from significant adjustment lag. When the coal feed fluctuates, the manual bolt or fixed eccentric wheel adjustment system takes more than 30 seconds to respond, resulting in ineffective grinding energy consumption as high as 15%-20%. Furthermore, the single sprocket drive structure is prone to tooth skipping and plastic deformation of the tooth surface under impact loads, severely restricting the continuous operation cycle of the equipment. Existing buffer mechanisms mostly use rigidly assembled cylindrical helical springs, which are difficult to effectively dissipate eccentric vibration energy, causing periodic collisions between the grinding wheel and the grinding disc, resulting in a coal powder qualification rate that has dropped to a low level of 82%-85% in the industry. In addition, due to the lack of optimized flow field design in the separator cavity, the backflow of fine powder exacerbates the secondary crushing in the grinding zone. Moreover, the lack of a coordinated control mechanism between the hydraulic actuator and the transmission system in traditional technical solutions leads to a chain of problems such as mismatched gear ratios and lag in hydraulic cylinder stroke compensation under variable frequency operation. When a coal mill is grinding coal, the grinding intensity cannot be adjusted according to the amount of coal, which will affect the uniformity of grinding. Therefore, there is an urgent need to design a linkage device for the roller grinding components of a coal mill that can adjust the grinding gap by variable frequency to solve the problem of grinding uniformity in coal mills. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a variable frequency modulation... A linkage device for the grinding components of a coal mill roller disc.

[0004] This invention is achieved through the following technical solution: A variable frequency adjustable grinding gap linkage device for a coal mill roller grinding component includes a coal mill body, a separator, and a base. The separator is installed on the upper side of the coal mill body, and the base is installed at the bottom of the coal mill body. A grinding section is located inside the coal mill body, including hydraulic cylinders evenly surrounding the outer circumference of the base. A piston rod is mounted on the upper side of the hydraulic cylinder, and a bracket is fixedly mounted on the top of the piston rod. A wheel frame is fixedly mounted in the middle of the bracket, and a grinding wheel is installed inside the wheel frame. A motor is located inside the base, and a rotating shaft is fixedly mounted on the motor shaft. A fourth sprocket is fixedly fitted on the surface of the rotating shaft. A slide is mounted on the upper side of the rotating shaft, and three sets of second gears are fitted on the surface of the slide. A grinding wheel is located on the right side of the base. A pole is fixedly installed at the upper corner. A positioning tube is installed above the pole. A spring rod is fitted inside the positioning tube. A collar is fixedly installed at the right end of the spring rod. A second rotating shaft is fitted inside the collar. A third sprocket is fixedly fitted at the lower end of the surface of the second rotating shaft. A second chain is fitted between the third sprocket and the fourth sprocket. A second sprocket is installed at the top of the second rotating shaft. A sleeve is fixedly installed on the upper surface of the pole. A sliding rod is fitted inside the sleeve. A gear frame is fixedly installed at the left end of the sliding rod. A helical spring is installed between the gear frame and the sleeve. A first rotating shaft is fitted inside the gear frame. A first gear is fixedly fitted on the surface of the first rotating shaft. A first sprocket is fixedly fitted at the lower end of the surface of the first rotating shaft. A first chain is fitted between the first sprocket and the second sprocket.

[0005] Preferably, the slide rod is slidably fitted with the sleeve, a nut is installed on the surface of the slide rod, one end of the helical spring is fixedly connected to the gear frame and the other end is fixedly connected to the sleeve.

[0006] Preferably, the first chain meshes with the first sprocket and the second sprocket, and the second chain meshes with the third sprocket and the fourth sprocket.

[0007] Preferably, the first gear meshes with the second gear, and the second gear moves from top to bottom. The lower diameter increases sequentially.

[0008] Preferably, the rotating shaft and the slide cylinder are in a sliding fit, and a spring is installed between the slide cylinder and the rotating shaft.

[0009] Preferably, the separator has an inclined surface.

[0010] Preferably, the sliding cylinder is fitted at the uppermost position of the base, and the two slide together.

[0011] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes three sets of second gears, with variations in gear diameter to control the grinding disc's rotation speed. As the amount of coal powder on the grinding disc changes, the sliding cylinder can be raised or lowered based on the weight change. More coal powder allows for a faster grinding disc rotation, improving grinding efficiency. A helical spring ensures the engagement of the first and second gears, facilitating grinding disc rotation through gear meshing. A hydraulic cylinder controls the height of the grinding wheel, controlling the grinding force of the coal powder on the grinding disc. This interconnected system, combining gear and sprocket meshing, allows for control of the rotation speed by changing the gear diameter, thus improving grinding efficiency. In essence, this invention controls the grinding speed of coal powder by varying the gear diameter to change the grinding disc's rotation speed, adjusting the speed based on the amount of coal to be ground, thereby enhancing grinding efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 This is a schematic diagram of the external outline of the present invention.

[0014] Labeling Explanation: 1. Separator, 2. Support, 3. Piston Rod, 4. Wheel Frame, 5. Compactor Roller, 6. Grinding Disc, 7. Helical Spring, 8. Vertical Rod, 9. Sleeve, 10. Slide Rod, 11. First Sprocket, 12. First Shaft, 13. Second Sprocket, 14. First Chain, 15. Gear Frame, 16. First gear, 17. Second shaft, 18. Collar, 19. Spring rod, 20. Positioning tube, 21. Third sprocket, 22. Second chain, 23. Hydraulic cylinder, 24. Base, 25. Fourth sprocket, 26. Shaft, 27. Slide cylinder, 28. Second gear, 29. Coal mill body. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-2 The present invention provides a technical solution: A variable frequency adjustable grinding gap linkage device for a coal mill roller grinding component includes a coal mill body 29, a separator 1, and a base 24. The separator 1 is installed on the upper side of the coal mill body 29, and the base 24 is installed on the bottom of the coal mill body 29. A grinding section is provided inside the coal mill body 29, and the grinding section includes a hydraulic cylinder 23. The hydraulic cylinder 23 is evenly surrounded around the outer periphery of the base 24. A piston rod 3 is mounted on the upper side of the hydraulic cylinder 23. A bracket 2 is fixedly mounted on the top of the piston rod 3. A wheel frame 4 is fixedly mounted in the middle of the bracket 2. A grinding wheel 5 is installed inside the wheel frame 4. The base 24 is not described in detail. The base 24 contains a motor, on which a rotating shaft 26 is fixedly mounted. A fourth sprocket 25 is fixedly fitted onto the surface of the rotating shaft 26. A slide cylinder 27 is mounted on the upper side of the rotating shaft 26, and three sets of second gears 28 are fitted onto the surface of the slide cylinder 27. A vertical rod 8 is fixedly mounted on the upper right corner of the base 24. A positioning tube 20 is located above the vertical rod 8. A spring rod 19 is fitted inside the positioning tube 20. A collar 18 is fixedly mounted on the right end of the spring rod 19. A second rotating shaft 17 is fitted inside the collar 18. A third sprocket 21 is fixedly fitted onto the lower end of the surface of the second rotating shaft 17. A second chain 22 is fitted between 21 and the fourth sprocket 25. A second sprocket 13 is installed at the top of the second shaft 17. A sleeve 9 is fixedly installed on the upper surface of the upright 8. A slide rod 10 is fitted inside the sleeve 9. A gear frame 15 is fixedly installed on the left end of the slide rod 10. A helical spring 7 is installed between the gear frame 15 and the sleeve 9. A first shaft 12 is fitted inside the gear frame 15. A first gear 16 is fixedly fitted on the surface of the first shaft 12. A first sprocket 11 is fixedly fitted on the lower end of the surface of the first shaft 12. A first chain 14 is fitted between the first sprocket 11 and the second sprocket 13.

[0017] The slide rod 10 is slidably engaged with the sleeve 9. A nut is installed on the surface of the slide rod 10. One end of the helical spring 7 is fixedly connected to the gear frame 15 and the other end is fixedly connected to the sleeve 9.

[0018] The first chain 14 meshes with the first sprocket 11 and the second sprocket 13 respectively, and the second chain 22 meshes with the third sprocket 21 and the fourth sprocket 25 respectively.

[0019] The first gear 16 meshes with the second gear 28, and the diameter of the second gear 28 increases sequentially from top to bottom.

[0020] The rotating shaft 26 and the slide cylinder 27 are in sliding fit, and a spring is installed between the slide cylinder 27 and the rotating shaft 26.

[0021] The separator 1 has an inclined surface inside.

[0022] The slide cylinder 27 is fitted onto the uppermost position of the base 24, and the two slide together.

[0023] Operating Procedures: The main improvement in this coal mill lies in the grinding linkage mechanism. When the coal on the grinding disc 6 increases, gravity causes the slide 27 to slide down. At this time, the uppermost second gear 28 meshes with the first gear 16. The second gear 28 rotates at a higher speed, which in turn increases the speed of the slide 27, thus increasing the speed of the grinding disc 6. Due to the helical spring 7, the first gear 16 and the second gear 28 engage better. Specifically, during the linkage operation, the coal mill's motor drive rotates the shaft 26. Because the shaft 26 and the slide... The rotation of the shaft 26 does not cause the cylinder 27 to rotate. The second shaft 17 rotates through the meshing of the second chain 22 with the third sprocket 21 and the fourth sprocket 25. The first gear 16 rotates through the meshing of the first chain 14 with the first sprocket 11 and the second sprocket 13. The first gear 16 rotates through the meshing of the first gear 16 with the second gear 28. The grinding disc 6 rotates when the amount of coal on the grinding disc 6 decreases. The grinding disc 6 rises because the weight of the coal powder on the grinding disc 6 becomes lighter. The grinding is controlled according to the amount of coal powder.

[0024] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A linkage device for a coal mill roller grinding component with variable frequency adjustable grinding gap, comprising a coal mill body (29), a separator (1), and a base (24), characterized in that: The separator (1) is installed on the upper side of the coal mill body (29), and the base (24) is installed at the bottom of the coal mill body (29). The coal mill body (29) is equipped with a coal grinding section, which includes a hydraulic cylinder (23). The hydraulic cylinder (23) is evenly surrounded around the outer periphery of the base (24). A piston rod (3) is installed on the upper side of the hydraulic cylinder (23). A bracket (2) is fixedly installed on the top of the piston rod (3). A wheel frame (4) is fixedly installed in the middle of the bracket (2). 4) The base (24) contains a rolling wheel (5), and a motor is installed inside the base (24). A rotating shaft (26) is fixedly installed on the motor shaft of the motor. A fourth sprocket (25) is fixedly fitted on the surface of the rotating shaft (26). A slide cylinder (27) is installed on the upper side of the rotating shaft (26). Three sets of second gears (28) are fitted on the surface of the slide cylinder (27). A vertical rod (8) is fixedly installed on the upper right corner of the base (24). A positioning tube (20) is installed above the vertical rod (8). 0) An internal spring rod (19) is fitted inside. A collar (18) is fixedly installed on the right end of the spring rod (19). A second rotating shaft (17) is fitted inside the collar (18). A third sprocket (21) is fixedly fitted on the lower end of the surface of the second rotating shaft (17). A second chain (22) is fitted between the third sprocket (21) and the fourth sprocket (25). A second sprocket (13) is installed on the top of the second rotating shaft (17). A sleeve (9) is fixedly installed on the upper side of the surface of the upright (8). The slide rod (10) is fitted inside. A gear frame (15) is fixedly installed on the left end of the slide rod (10). A helical spring (7) is installed between the gear frame (15) and the sleeve (9). A first rotating shaft (12) is fitted inside the gear frame (15). A first gear (16) is fixedly fitted on the surface of the first rotating shaft (12). A first sprocket (11) is fixedly fitted on the lower end of the surface of the first rotating shaft (12). A first chain (14) is fitted between the first sprocket (11) and the second sprocket (13).

2. The linkage device for a coal mill roller grinding component with variable frequency adjustment of grinding gap according to claim 1, characterized in that: The slide rod (10) is slidably engaged with the sleeve (9), and a nut is installed on the surface of the slide rod (10). One end of the helical spring (7) is fixedly connected to the gear frame (15), and the other end is fixedly connected to the sleeve (9).

3. The linkage device for a coal mill roller grinding component with variable frequency adjustment of grinding gap according to claim 1, characterized in that: The first chain (14) meshes with the first sprocket (11) and the second sprocket (13) respectively, and the second chain (22) meshes with the third sprocket (21) and the fourth sprocket (25) respectively.

4. The linkage device for a coal mill roller grinding component with variable frequency adjustment of grinding gap according to claim 1, characterized in that: The first gear (16) meshes with the second gear (28), and the diameter of the second gear (28) increases sequentially from top to bottom.

5. The linkage device for a coal mill roller grinding component with variable frequency adjustment of grinding gap according to claim 1, characterized in that: The rotating shaft (26) and the slide cylinder (27) are in sliding fit, and a spring is installed between the slide cylinder (27) and the rotating shaft (26).

6. The linkage device for a coal mill roller grinding component with variable frequency adjustment of grinding gap according to claim 1, characterized in that: The separator (1) has an inclined surface inside.

7. A linkage device for a coal mill roller grinding component with variable frequency adjustment of grinding gap according to claim 1, characterized in that: The slide tube (27) is fitted onto the uppermost position of the base (24), and the two slide together.

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