A dynamic and static ring adjusting mechanism of a coal mill

Abstract

The application belongs to the technical field of coal mills, and discloses a dynamic and static ring adjusting mechanism of a coal mill, which comprises an adjusting assembly, the adjusting assembly comprises a motor, the bottom of the motor is rotationally connected with a lead screw, the lead screw is threadedly sleeved with a threaded sleeve, the threaded sleeve is fixedly connected with a sliding block, and the top of the sliding block is fixedly connected with two piston rods; the threaded sleeve and the sliding block are cooperated to facilitate the adjustment of the distance between the static ring and the dynamic ring, the distance between the static ring and the dynamic ring can be the required size or the size smaller than the required size of the pulverized coal particles, the average particle size of the final product can be controlled, various production requirements can be met, the particle size distribution of the ground powder can be changed by simply adjusting the distance between the dynamic ring and the static ring, the requirements of different industries or purposes can be met, the flexibility of production is improved, and when the static ring or the dynamic ring is worn, the influence of the wear on the quality of the produced product can be reduced by adjusting the distance.

Description

Technical Field

[0001] This invention belongs to the field of coal mill technology, specifically a dynamic and static ring adjustment mechanism for a coal mill. Background Technology

[0002] The coal mill is a key piece of equipment in the pulverizing system of a coal-fired power plant. The dynamic and static ring structure is an important structure for ensuring normal pulverizing. During the operation of the coal mill, the motor drives the grinding disc to rotate. The material falls from the feed inlet into the center of the grinding disc through the airlock feeder. At the same time, hot air enters the mill from the air inlet. As the grinding disc rotates, the material moves towards the edge of the grinding disc under the action of centrifugal force. When it passes through the annular groove on the grinding disc, it is crushed by the grinding roller. The crushed material is blown up by the primary air entering the grinding disc through the dynamic ring at the edge of the grinding disc. Large particles fall directly onto the grinding disc for re-crushing. When the material in the airflow passes through the upper separator, under the action of the rotating rotor, the coarse powder falls from the cone hopper onto the grinding disc for re-grinding. The qualified fine powder exits the mill with the airflow and is collected by the dust collection device, which is the product. The static ring of the coal mill is fixedly installed on the machine casing support, and the dynamic ring is connected to the grinding disc and rotates together. There is a certain gap between the dynamic ring and the static ring.

[0003] In existing coal mills, the gap between the moving and stationary rings is mostly fixed, which means that the device can only produce coal powder particles of a fixed size, resulting in poor production flexibility. At the same time, when the side of the moving and stationary rings that are close to each other is worn, the size of the produced product will be larger than the required size. Therefore, a moving and stationary ring adjustment mechanism for a coal mill is proposed, which can facilitate the adjustment of the distance between the moving and stationary rings. Summary of the Invention

[0004] To address the issue that the gap between the moving and stationary rings in the aforementioned background technology is mostly fixed, resulting in the device only being able to produce coal powder particles of a fixed size, leading to poor production flexibility, and the problem that when the moving and stationary rings are worn on the side that is close to each other, the size of the produced product will be larger than the required size, this invention provides a moving and stationary ring adjustment mechanism for a coal mill.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dynamic and static ring adjustment mechanism for a coal mill, comprising an adjustment component, a transmission component rotatably connected below the adjustment component, the transmission component being disposed inside a fixed component, the fixed component being disposed inside a coal milling component, and the adjustment component being located inside the coal milling component;

[0006] The adjustment assembly includes a motor, a lead screw rotatably connected to the bottom of the motor, a threaded sleeve threaded onto the lead screw, a slider fixedly connected to the threaded sleeve, two piston rods fixedly connected to the top of the slider, a spring fixedly connected to the top of the slider, a stationary ring slidably connected to the slider, and several first grooves formed on the side of the stationary ring, each of the first grooves having two sealing cavities on its inner wall, and an elastic anti-collision pad fixedly connected to the inner wall of the first groove.

[0007] Preferably, the piston rod is located inside the spring, the slider is slidably connected to the first groove, and there are several sliders and lead screws. The sliders are evenly distributed on the side of the stationary ring, the top of the slider is elastically connected to the inner wall of the first groove through the spring, the piston rod extends through the inner wall of the first groove to the inside of the sealing cavity, the top of the first groove is slidably connected to the sealing cavity, and the elastic anti-collision pad is located below the slider.

[0008] Preferably, the transmission assembly includes a gear ring, on the side of which a plurality of driving gears are meshed, and a plurality of arc-shaped grooves are evenly provided on the gear ring. A plurality of adjusting plates are slidably connected above the gear ring, and two sliding rods are fixedly connected to the upper and lower ends of each adjusting plate. An elastic telescopic ring is fixedly connected to the side of each adjusting plate away from the driving gear.

[0009] Preferably, the slide rod is slidably connected to the arc-shaped groove, the tops of the plurality of drive gears are fixedly connected to the bottoms of the plurality of lead screws, and the elastic telescopic ring is located below the stationary ring.

[0010] Preferably, the fixing component includes a fixing frame, a partition is fixedly connected to the inner side of the fixing frame, a guide groove is uniformly opened at the bottom of the partition, an elastic sealing gasket is fixedly connected to the top of the partition, a plurality of second sliding grooves are uniformly opened on the inner side of the fixing frame, and a third sliding groove is opened on the inner side of the fixing frame.

[0011] Preferably, the second groove is located above the partition, and the third groove is located below the partition.

[0012] Preferably, the fixed frame has several motors fixedly connected inside, the lead screw is rotatably connected to the inner wall of the fixed frame, the threaded sleeve is slidably connected to the inner wall of the fixed frame, the slider is slidably connected to the second slide groove, and the drive gear is rotatably connected to the inner wall of the fixed frame.

[0013] Preferably, the gear ring is rotatably connected to the inner wall of the fixed frame, the plurality of adjusting plates are slidably connected to the third slide groove, the stationary ring is located inside the fixed frame, the slider extends through the second slide groove to the inside of the first slide groove, and the bottom of the stationary ring is elastically connected to the partition plate through an elastic sealing gasket.

[0014] Preferably, the coal grinding assembly includes a coal mill housing, a grinding disc is rotatably connected inside the coal mill housing, a grinding groove is formed on the top of the grinding disc, a moving ring is fixedly connected to the outside of the grinding disc, and a plurality of air ducts are evenly formed on the moving ring.

[0015] Preferably, the stationary ring is located above the moving ring, and the elastic telescopic ring is located between the adjusting plate and the moving ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention facilitates the adjustment of the distance between the stationary and rotating rings by using a combination of a threaded sleeve and a slider. Starting the motor causes the lead screw to rotate, which in turn drives the threaded sleeve upwards within the fixed frame via the adjusting assembly. This causes the slider to slide upwards within the second groove, separating the bottom of the slider from the elastic anti-collision pad. This, in turn, causes the piston rod to move upwards within the sealing cavity, compressing the gas inside and simultaneously compressing the spring. The spring force and the air pressure within the sealing cavity then drive the stationary ring upwards stably, stretching the elastic sealing gasket and increasing the gap between the stationary and rotating rings. This allows the distance between the stationary and rotating rings to be adjusted to accommodate coal powder particles of the required size or smaller, thus controlling the average particle size of the final product. Furthermore, this invention adapts to various production needs; simply adjusting the distance between the stationary and rotating rings changes the particle size distribution of the grinding process, meeting the requirements of different industries or applications and improving production flexibility. Additionally, when the stationary or rotating rings are worn, adjusting the distance can reduce the impact of wear on product quality.

[0018] This invention facilitates the adjustment of the distance between the elastic telescopic ring and the moving ring by using a combination of adjusting plates and elastic telescopic rings. The rotation of the lead screw drives the rotation of the drive gear, which in turn drives the gear ring to rotate inside the fixed frame. The rotation of the fixed frame applies stress to the adjusting plates through the arc groove. This stress causes several adjusting plates to slide away from the moving ring inside the third sliding groove under the limit of the guide groove, stretching the elastic telescopic ring and increasing the distance between the elastic telescopic ring and the moving ring. This adjustment is synchronized with the static ring, ensuring that the distance between the elastic telescopic ring and the moving ring matches the distance between the static ring and the moving ring. This avoids situations where the distance between the elastic telescopic ring and the moving ring is greater than the distance between the static ring and the moving ring, leading to increased air volume, air leakage, and decreased efficiency. Conversely, if the distance between the elastic telescopic ring and the moving ring is less than the distance between the static ring and the moving ring, coal powder particles of the required size cannot fall smoothly below the moving ring.

[0019] This invention facilitates buffering of the stationary ring by using a combination of elastic anti-collision pads and elastic sealing gaskets. When slightly larger than required coal powder particles pass through the gap between the stationary and moving rings, the particles compress the stationary ring upwards, causing it to move slightly upwards and stretch the elastic sealing gasket. The elasticity of the sealing gasket buffers the stationary ring. During this process, these coal powder particles are ground to the required size by the stationary and moving rings. Simultaneously, the slider moves downwards relative to the first groove, with the bottom of the slider abutting against the elastic anti-collision pad, limiting the upward distance of the stationary ring and preventing larger coal powder particles from entering the gap between the stationary and moving rings. This is because the large-sized coal powder particles cannot be ground to the required size in the short time they pass through the gap. The elastic anti-collision pads prevent noise and wear caused by the slider colliding with the inner wall of the first groove. Furthermore, the elasticity contributes to the stability of the stationary ring. Attached Figure Description

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

[0021] Figure 2 This is a schematic cross-sectional view of the coal mill assembly of the present invention;

[0022] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 This is a schematic diagram showing the structural relationship and fit between the stationary ring and the moving ring of the present invention;

[0024] Figure 5 This is a schematic diagram showing the structural relationship and fit between the slide bar and the guide groove of the present invention;

[0025] Figure 6 This is a schematic diagram showing the structural relationship and fit between the slide bar and the arc-shaped groove of the present invention;

[0026] Figure 7 This is a schematic diagram of the adjusting plate structure from below in this invention;

[0027] Figure 8 This is a schematic diagram illustrating the structural relationship between the slider and the second slider of the present invention.

[0028] In the diagram: 1. Adjustment assembly; 101. Motor; 102. Lead screw; 103. Threaded sleeve; 104. Slider; 105. Piston rod; 106. Spring; 107. Stationary ring; 108. First slide groove; 109. Sealing cavity; 110. Elastic anti-collision pad; 2. Transmission assembly; 201. Drive gear; 202. Gear ring; 203. Arc groove; 204. Adjustment plate; 205. Slide rod; 206. Elastic telescopic ring; 3. Fixing assembly; 301. Fixing frame; 302. Partition plate; 303. Guide groove; 304. Elastic sealing gasket; 305. Second slide groove; 306. Third slide groove; 4. Coal grinding assembly; 401. Coal mill shell; 402. Grinding disc; 403. Grinding groove; 404. Moving ring; 405. Air duct. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 8 As shown, the present invention provides a dynamic and static ring adjustment mechanism for a coal mill, including an adjustment component 1, a transmission component 2 rotatably connected below the adjustment component 1, the transmission component 2 being disposed inside a fixed component 3, the fixed component 3 being disposed inside a coal milling component 4, and the adjustment component 1 being located inside the coal milling component 4.

[0031] The adjustment assembly 1 includes a motor 101, a lead screw 102 rotatably connected to the bottom of the motor 101, a threaded sleeve 103 threaded onto the lead screw 102, a slider 104 fixedly connected to the threaded sleeve 103, two piston rods 105 fixedly connected to the top of the slider 104, a spring 106 fixedly connected to the top of the slider 104, a stationary ring 107 slidably connected to the slider 104, a plurality of first grooves 108 opened on the side of the stationary ring 107, two sealing cavities 109 opened on the inner wall of each of the plurality of first grooves 108, and an elastic anti-collision pad 110 fixedly connected to the inner wall of the first groove 108.

[0032] The piston rod 105 is located inside the spring 106. The slider 104 is slidably connected to the first groove 108. There are several sliders 104 and several lead screws 102. Several sliders 104 are evenly distributed on the side of the stationary ring 107. The top of the slider 104 is elastically connected to the inner wall of the first groove 108 through the spring 106. The piston rod 105 extends through the inner wall of the first groove 108 to the inside of the sealing cavity 109. The top of the first groove 108 is slidably connected to the sealing cavity 109. An elastic anti-collision pad 110 is fixedly connected to the inner wall of the first groove 108.

[0033] The above solution facilitates the adjustment of the distance between the stationary ring 107 and the moving ring 404 by using a combination of a threaded sleeve 103 and a slider 104. Starting the motor 101 causes the lead screw 102 to rotate. This rotation, via the adjusting assembly 1, drives the threaded sleeve 103 upwards within the fixed frame 301, causing the slider 104 to slide upwards within the second groove 305. This separates the bottom of the slider 104 from the elastic anti-collision pad 110, causing the piston rod 105 to move upwards within the sealing cavity 109, compressing the gas inside and simultaneously compressing the spring 106. The spring 106 then... The force and the air pressure inside the sealing cavity 109 drive the stationary ring 107 to move steadily upward, stretching the elastic sealing gasket 304 and increasing the gap between the stationary ring 107 and the rotating ring 404. This allows the distance between the stationary ring 107 and the rotating ring 404 to be controlled by coal powder particles of the required size and smaller than the required size, thus controlling the average particle size of the final product. At the same time, it can adapt to various production needs. The particle size distribution of the grinding can be changed simply by adjusting the distance between the stationary and rotating rings, meeting the requirements of different industries or applications, improving production flexibility. Furthermore, when the stationary ring 107 or the rotating ring 404 is worn, the impact of wear on the quality of the produced product can be reduced by adjusting the distance.

[0034] like Figures 3 to 7 As shown, the transmission assembly 2 includes a gear ring 202, with several driving gears 201 meshing on the side of the gear ring 202. Several arc-shaped grooves 203 are evenly distributed on the gear ring 202. Several adjusting plates 204 are slidably connected to the top of the gear ring 202. Two sliding rods 205 are fixedly connected to the upper and lower ends of each adjusting plate 204. Elastic telescopic rings 206 are fixedly connected to the side of each adjusting plate 204 away from the driving gears 201. The sliding rods 205 are slidably connected to the arc-shaped grooves 203. The tops of the several driving gears 201 are fixedly connected to the bottoms of several lead screws 102 respectively. The elastic telescopic rings 206 are located below the stationary ring 107.

[0035] The fixing component 3 includes a fixing frame 301, a partition 302 is fixedly connected to the inner side of the fixing frame 301, guide grooves 303 are evenly provided at the bottom of the partition 302, and an elastic sealing gasket 304 is fixedly connected to the top of the partition 302. A plurality of second sliding grooves 305 are evenly provided on the inner side of the fixing frame 301, and a third sliding groove 306 is provided on the inner side of the fixing frame 301. The second sliding grooves 305 are located above the partition 302, and the third sliding grooves 306 are located below the partition 302.

[0036] The above solution facilitates the adjustment of the distance between the elastic telescopic ring 206 and the moving ring 404 by using the coordination of structures such as the adjusting plate 204 and the elastic telescopic ring 206. The rotation of the lead screw 102 drives the drive gear 201 to rotate, which in turn drives the gear ring 202 to rotate inside the fixed frame 301. The rotation of the fixed frame 301 applies stress to the adjusting plate 204 through the arc-shaped groove 203. This stress causes several adjusting plates 204 to slide away from the moving ring 404 within the third sliding groove 306, limited by the guide groove 303. The elastic expansion ring 206 is stretched, and the distance between the elastic expansion ring 206 and the moving ring 404 is increased. This is adjusted synchronously with the stationary ring 107 to make the distance between the elastic expansion ring 206 and the moving ring 404 match the distance between the stationary ring 107 and the moving ring 404. This avoids the situation where the distance between the elastic expansion ring 206 and the moving ring 404 is greater than the distance between the stationary ring 107 and the moving ring 404, which would lead to increased air volume, air leakage, and decreased efficiency. At the same time, if the distance between the elastic expansion ring 206 and the moving ring 404 is less than the distance between the stationary ring 107 and the moving ring 404, the coal powder particles of the required size cannot fall smoothly under the moving ring 404.

[0037] like Figures 1 to 3 As shown, several motors 101 are fixedly connected inside the fixed frame 301. The lead screw 102 is rotatably connected to the inner wall of the fixed frame 301. The threaded sleeve 103 is slidably connected to the inner wall of the fixed frame 301. The slider 104 is slidably connected to the second slide groove 305. The drive gear 201 is rotatably connected to the inner wall of the fixed frame 301. The gear ring 202 is rotatably connected to the inner wall of the fixed frame 301. Several adjusting plates 204 are slidably connected to the third slide groove 306. The stationary ring 107 is located inside the fixed frame 301. The slider 104 extends through the second slide groove 305 to the inside of the first slide groove 108. The bottom of the stationary ring 107 is elastically connected to the partition plate 302 through the elastic sealing gasket 304.

[0038] The coal mill assembly 4 includes a coal mill housing 401, a grinding disc 402 is rotatably connected inside the coal mill housing 401, a grinding groove 403 is opened on the top of the grinding disc 402, a moving ring 404 is fixedly connected to the outside of the grinding disc 402, a plurality of air ducts 405 are evenly opened on the moving ring 404, a stationary ring 107 is located above the moving ring 404, and an elastic telescopic ring 206 is located between the adjusting plate 204 and the moving ring 404.

[0039] The above solution, through the combination of elastic anti-collision pads 110 and elastic sealing gaskets 304, facilitates the buffering of the stationary ring 107. When slightly larger than required coal dust particles pass through the gap between the stationary ring 107 and the moving ring 404, the coal dust particles will press upwards against the stationary ring 107, causing it to move slightly upwards and stretch the elastic sealing gasket 304. The elastic force of the elastic sealing gasket 304 buffers the stationary ring 107. During this process, these coal dust particles are ground to the required size by the stationary ring 107 and the moving ring 404, while simultaneously causing the slider 104 to... The slide groove 108 moves downwards relative to the inside, causing the bottom of the slider 104 to abut against the elastic anti-collision pad 110, limiting the upward distance of the stationary ring 107 and preventing larger coal powder particles from entering the gap between the stationary ring 107 and the moving ring 404. This is because in the short time that coal powder particles pass through the gap, it is impossible to grind larger coal powder particles into the required size. The elastic anti-collision pad 110 can prevent noise generated by the collision between the slider 104 and the inner wall of the first slide groove 108 and prevent wear on the slider 104. At the same time, the elasticity can play a certain role in stabilizing the stationary ring 107.

[0040] The working principle and usage process of this invention are as follows: First, start the motor 101 to make the lead screw 102 rotate. The rotation of the lead screw 102 will drive the threaded sleeve 103 to move upward inside the fixed frame 301 through the thread of the adjusting component 1. This will drive the slider 104 to slide upward inside the second slide groove 305, so that the bottom of the slider 104 separates from the elastic anti-collision pad 110. This will drive the piston rod 105 to move upward inside the sealing cavity 109, compressing the gas inside the sealing cavity 109 and compressing the spring 106 at the same time. Through the elastic force of the spring 106 and the air pressure inside the sealing cavity 109, the stationary ring 107 will move upward steadily, stretching the elastic sealing gasket 304 and increasing the gap between the stationary ring 107 and the moving ring 404. The gap between the stationary ring 107 and the moving ring 404 will be adjusted synchronously with the stationary ring 107 so that the gap between the stationary ring 107 and the moving ring 404 can accommodate coal powder particles of the required size and smaller than the required size.

[0041] Simultaneously, the rotation of the lead screw 102 will drive the drive gear 201 to rotate, and the rotation of the drive gear 201 will drive the gear ring 202 to rotate inside the fixed frame 301. The rotation of the fixed frame 301 will apply stress to the adjusting plate 204 through the arc groove 203. The stress will cause several adjusting plates 204 to slide away from the moving ring 404 in the direction of the guide groove 303 inside the third sliding groove 306 under the limit of the guide groove 303, stretching the elastic telescopic ring 206 and increasing the distance between the elastic telescopic ring 206 and the moving ring 404, so that the distance between the elastic telescopic ring 206 and the moving ring 404 is matched with the distance between the stationary ring 107 and the moving ring 404.

[0042] During the operation of the grinding disc 402, coal powder particles slightly larger than the required size will press upwards against the stationary ring 107 when passing through the gap between the stationary ring 107 and the moving ring 404. This causes the stationary ring 107 to move slightly upwards and stretch the elastic sealing gasket 304. The elasticity of the elastic sealing gasket 304 buffers the stationary ring 107. During this process, these coal powder particles will be ground to the required size by the stationary ring 107 and the moving ring 404. At the same time, the slider 104 will move downwards relative to the first slide groove 108, so that the bottom of the slider 104 abuts against the elastic anti-collision pad 110, limiting the upward distance of the stationary ring 107 and preventing larger coal powder particles from entering the gap between the stationary ring 107 and the moving ring 404. This is because it is impossible to grind larger coal powder particles to the required size in the short time it takes for them to pass through the gap.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic and static ring adjustment mechanism for a coal mill, comprising an adjustment assembly (1), characterized in that: The adjustment component (1) is rotatably connected to the lower part of the transmission component (2), the transmission component (2) is disposed inside the fixed component (3), the fixed component (3) is disposed inside the coal grinding component (4), and the adjustment component (1) is located inside the coal grinding component (4). The adjustment assembly (1) includes a motor (101), a lead screw (102) is rotatably connected to the bottom of the motor (101), a threaded sleeve (103) is threaded onto the lead screw (102), a slider (104) is fixedly connected to the threaded sleeve (103), two piston rods (105) are fixedly connected to the top of the slider (104), a spring (106) is fixedly connected to the top of the slider (104), a stationary ring (107) is slidably connected to the slider (104), a plurality of first grooves (108) are provided on the side of the stationary ring (107), two sealing cavities (109) are provided on the inner wall of each of the plurality of first grooves (108), and an elastic anti-collision pad (110) is fixedly connected to the inner wall of the first groove (108). The transmission assembly (2) includes a gear ring (202), a plurality of driving gears (201) meshing on the side of the gear ring (202), a plurality of arc-shaped grooves (203) evenly provided on the gear ring (202), a plurality of adjusting plates (204) slidably connected above the gear ring (202), two slide rods (205) fixedly connected to the upper and lower ends of the adjusting plates (204), and elastic telescopic rings (206) fixedly connected to the side of the plurality of adjusting plates (204) away from the driving gears (201); The slide bar (205) is slidably connected to the arc groove (203), the tops of several drive gears (201) are fixedly connected to the bottoms of several lead screws (102), and the elastic telescopic ring (206) is located below the stationary ring (107). The fixing component (3) includes a fixing frame (301), a partition (302) is fixedly connected to the inner side of the fixing frame (301), a guide groove (303) is evenly provided at the bottom of the partition (302), an elastic sealing gasket (304) is fixedly connected to the top of the partition (302), a plurality of second sliding grooves (305) are evenly provided on the inner side of the fixing frame (301), and a third sliding groove (306) is provided on the inner side of the fixing frame (301).

2. The dynamic and static ring adjustment mechanism of the coal mill according to claim 1, characterized in that: The piston rod (105) is located inside the spring (106). The slider (104) is slidably connected to the first groove (108). There are several sliders (104) and several lead screws (102). Several sliders (104) are evenly distributed on the side of the stationary ring (107). The top of the slider (104) is elastically connected to the inner wall of the first groove (108) through the spring (106). The piston rod (105) extends through the inner wall of the first groove (108) to the interior of the sealing cavity (109). The top of the first groove (108) is slidably connected to the sealing cavity (109). The elastic anti-collision pad (110) is located below the slider (104).

3. The dynamic and static ring adjustment mechanism of the coal mill according to claim 1, characterized in that: The second groove (305) is located above the partition (302), and the third groove (306) is located below the partition (302).

4. The dynamic and static ring adjustment mechanism of the coal mill according to claim 1, characterized in that: The fixed frame (301) is internally fixedly connected to several motors (101), the lead screw (102) is rotatably connected to the inner wall of the fixed frame (301), the threaded sleeve (103) is slidably connected to the inner wall of the fixed frame (301), the slider (104) is slidably connected to the second slide groove (305), and the drive gear (201) is rotatably connected to the inner wall of the fixed frame (301).

5. The dynamic and static ring adjustment mechanism of the coal mill according to claim 1, characterized in that: The gear ring (202) is rotatably connected to the inner wall of the fixed frame (301), and several adjusting plates (204) are slidably connected to the third slide groove (306). The stationary ring (107) is located inside the fixed frame (301). The slider (104) extends through the second slide groove (305) to the inside of the first slide groove (108). The bottom of the stationary ring (107) is elastically connected to the partition plate (302) through an elastic sealing gasket (304).

6. The dynamic and static ring adjustment mechanism of the coal mill according to claim 1, characterized in that: The coal grinding assembly (4) includes a coal mill housing (401), a grinding disc (402) is rotatably connected inside the coal mill housing (401), a grinding groove (403) is opened on the top of the grinding disc (402), a moving ring (404) is fixedly connected to the outside of the grinding disc (402), and a plurality of air ducts (405) are evenly opened on the moving ring (404).

7. The dynamic and static ring adjustment mechanism of the coal mill according to claim 6, characterized in that: The stationary ring (107) is located above the moving ring (404), and the elastic telescopic ring (206) is located between the adjusting plate (204) and the moving ring (404).

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