Grinding mechanism of vertical roller mill

Abstract

The invention provides a vertical roller mill grinding mechanism which comprises a driving mechanism and a grinding disc, the driving mechanism is arranged above the grinding disc, and a plurality of sets of transmission shafts are arranged on the annular side of the driving mechanism; the grinding unit is assembled on the transmission shaft, the grinding unit comprises a grinding roller, a rotating sleeve rod and a connecting rod, the connecting rod is fixedly connected with the transmission shaft, the rotating sleeve rod is nested on the transmission shaft, and the grinding roller is arranged on the rotating sleeve rod; a transmission rod piece is arranged between the rotating sleeve rod and the connecting rod for connection, and the grinding roller is arranged above the grinding disc in a suspended mode. The transmission rod piece deforms along with rotation of the transmission shaft to pull the rotating sleeve rod to change the gap between the grinding roller and the grinding disc, stage treatment is achieved through active change adjustment, the diameters of material particles are treated stage by stage, frequent changes of stress of the grinding roller are reduced, the action effect of the grinding roller and materials is improved, and the service life of the grinding roller is prolonged. Therefore, the processing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vertical roller mills, and in particular relates to a grinding mechanism of a vertical roller mill. Background Art

[0002] The vertical roller mill drives the grinding disc to rotate through the motor and the reducer. The material falls from the feed port to the center of the grinding disc through the air lock feeder, and the hot air enters the mill from the air inlet. As the grinding disc rotates, the material moves to the edge of the grinding disc under the action of centrifugal force, and is crushed by the grinding roller when passing through the annular groove on the grinding disc. After crushing, the material is carried by the high-speed airflow of the wind ring at the edge of the grinding disc, and the large particles fall directly onto the grinding disc for re-grinding. When the material in the airflow passes through the upper separator, the coarse powder falls from the cone bucket to the grinding disc for re-grinding under the action of the rotating rotor, and the qualified fine powder is discharged from the mill with the airflow and collected by the dust collection device, which is the product.

[0003] In the vertical roller mill, large particles of material will be returned to the grinding disc for grinding under the action of cyclone separation. In the prior art, the grinding roller in the vertical roller mill adopts a passive structure to change the gap between the grinding disc and the grinding disc during the grinding process. This method usually applies a large pressure and deformation will only occur when the extrusion force between the grinding roller and the grinding disc is too large. This processing method results in uneven extrusion force when the diameters of the material particles on the grinding disc are different, and the grinding roller cannot effectively act on the material, resulting in low grinding efficiency. Summary of the invention

[0004] The invention provides a grinding mechanism for a vertical roller mill, aiming to solve the problem that when the diameters of material particles on a grinding disc are different in the current vertical roller mill, the grinding roller is subjected to uneven extrusion force, the grinding roller cannot effectively act on the material, and the grinding process efficiency is low.

[0005] The present invention is achieved in that a vertical roller mill grinding mechanism comprises:

[0006] A driving mechanism and a grinding disc, wherein the driving mechanism is arranged above the grinding disc, and a plurality of transmission shafts are arranged on the ring side of the driving mechanism;

[0007] A grinding unit, the grinding unit is assembled on the transmission shaft, the grinding unit comprises a grinding roller, a rotating sleeve rod and a connecting rod, the connecting rod is fixedly connected to the transmission shaft, the rotating sleeve rod is nested on the transmission shaft, and the grinding roller is arranged at one end of the rotating sleeve rod away from the connecting rod;

[0008] A transmission rod is provided between the rotating sleeve rod and the connecting rod, and the transmission rod comprises a first connecting rod and a second connecting rod, wherein the first connecting rod is hinged on the connecting rod, and two ends of the second connecting rod are respectively hinged on the first connecting rod and the rotating sleeve rod;

[0009] The grinding roller is suspended above the grinding disc, and the transmission rod is deformed as the transmission shaft rotates to pull the rotating sleeve rod to change the gap between the grinding roller and the grinding disc.

[0010] Preferably, the driving mechanism comprises a driving motor and a transmission mechanism, and the transmission shaft extends out of the transmission mechanism from the transmission mechanism ring side;

[0011] Preferably, the transmission shaft is arranged perpendicular to the motor shaft of the driving motor, the rotating sleeve rod is arranged parallel to the rotating plane of the grinding disc, and the grinding roller is a frustum structure.

[0012] Preferably, a driving wheel is provided at the end of the motor shaft of the driving motor, and a driven wheel is provided at one end of the transmission shaft away from the return spring, and the rotation axis of the driven wheel is perpendicular to the rotation axis of the driving wheel.

[0013] Preferably, the transmission shaft is arranged to be inclined relative to the motor shaft of the driving motor, the rotating sleeve rod is arranged to be inclined relative to the rotating plane of the grinding disc, and the grinding roller is a cylindrical structure.

[0014] Preferably, a driving wheel is provided at the end of the motor shaft of the driving motor, a driven wheel is provided at the end of the transmission shaft away from the return spring, the angle between the rotation axis of the driven wheel and the rotation axis of the driving wheel is an obtuse angle, and a return spring is also provided at the end of the transmission shaft away from the transmission mechanism, and the return spring is connected to the end face of the grinding roller away from the rotating sleeve rod.

[0015] Preferably, a counterweight block is provided on the first connecting rod, one end of the first connecting rod away from the counterweight block is rotatably connected to the connecting rod, and the second connecting rod is rotatably connected to the middle section of the first connecting rod.

[0016] Preferably, the rotating sleeve rod and the grinding roller are both provided with guide holes for accommodating the transmission shaft to pass through, and the rotating sleeve rod and the grinding roller are elastically connected.

[0017] Preferably, the rotating sleeve rod comprises a front rod, a rear rod and a spring, one end of the front rod extends into the interior of the rear rod, and the spring is nested outside the front rod and the rear rod and connected to the front rod and the rear rod respectively.

[0018] Preferably, a hinge seat is provided on the front rod, one end of the second connecting rod away from the first connecting rod is hinged on the hinge seat, and one end of the rear rod away from the front rod is connected to the grinding roller.

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0020] 1. The grinding mechanism of the vertical roller mill provided by the present invention controls the rotation speed of the transmission shaft to allow the transmission rod to form different degrees of deformation under the action of centrifugal force, so that the gap between the grinding roller and the grinding disc can be actively adjusted to meet the processing needs of different diameters. The graded processing is achieved through active change and adjustment, and the material particle diameter is processed step by step, which reduces the frequent changes in the force on the grinding roller, improves the effect of the grinding roller and the material, and thus improves the efficiency of the processing process.

[0021] 2. The vertical roller mill grinding mechanism provided by the present invention changes the gap between the grinding roller and the grinding disc by controlling the rotation speed of the transmission shaft. The rotation speed can be changed in stages by periodic changes, thereby reducing the time that the grinding roller is in a fine grinding state, alleviating the processing pressure of the grinding roller, and improving the processing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention provides a schematic structural diagram of a vertical roller mill grinding mechanism.

[0023] Figure 2 The present invention provides a schematic diagram of the top plan view of a grinding mechanism of a vertical roller mill.

[0024] Figure 3 The present invention provides a schematic diagram of the structure of a grinding unit using a truncated cone structure grinding roller in a grinding mechanism of a vertical roller mill.

[0025] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of a grinding unit is provided in FIG.

[0026] Figure 5 The present invention provides a schematic diagram of the structure of a grinding unit using a cylindrical grinding roller in a grinding mechanism of a vertical roller mill.

[0027] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure of a grinding unit is provided in FIG.

[0028] Figure 7 The present invention provides a schematic diagram of the decomposed structure of a transmission rod of a grinding mechanism of a vertical roller mill.

[0029] Figure 8 The invention provides a schematic diagram of the structure of a grinding roller and a return spring of a grinding mechanism of a vertical roller mill.

[0030] Fig. 9 The invention discloses a schematic structural diagram of a front rod and a rear rod of a grinding mechanism of a vertical roller mill.

[0031] Fig.10The present invention provides a schematic diagram of a vertical roller mill grinding mechanism in which a motor shaft and a transmission shaft are arranged vertically.

[0032] Fig.11 The present invention provides a schematic diagram of the inclined arrangement structure of the motor shaft and the transmission shaft of a vertical roller mill grinding mechanism.

[0033] Description of reference numerals:

[0034] 100, driving mechanism; 110, driving motor; 111, motor shaft; 120, transmission mechanism; 121, driving wheel; 122, driven wheel; 130, transmission shaft; 140, return spring;

[0035] 200, grinding unit; 210, grinding roller; 220, rotating sleeve rod; 221, hinge seat; 222, front rod; 223, rear rod; 224, spring; 230, connecting rod; 240, transmission rod; 241, first connecting rod; 242, second connecting rod; 243, counterweight;

[0036] 300. Grinding disc. DETAILED DESCRIPTION

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] The embodiment of the present invention provides a vertical roller mill grinding mechanism, such as Figure 1-Figure 11 As shown, the vertical roller mill grinding mechanism comprises:

[0040] A driving mechanism 100 and a grinding disc 300, wherein the driving mechanism 100 is disposed above the grinding disc 300, and a plurality of transmission shafts 130 are disposed on the ring side of the driving mechanism 100; the grinding disc 300 is arranged parallel to the ground, and the top surface of the grinding disc 300 is an inclined structure to facilitate the diffusion of materials from the central area to the surrounding areas, and a motor device for driving the grinding disc 300 to rotate is disposed below the grinding disc 300, and the driving mechanism 100 includes a driving motor 110 and a transmission mechanism 120, and the transmission shaft 130 extends from the ring side of the transmission mechanism 120 to the transmission mechanism 120, and the driving motor 110 is perpendicular to the rotation of the grinding disc 300, and a plurality of power output shafts are formed through the action of the transmission mechanism 120, and the grinding process is completed by the relative movement between the grinding mechanism on the power output shaft and the grinding disc 300;

[0041] A grinding unit 200, the grinding unit 200 is assembled on the transmission shaft 130, the grinding unit 200 includes a grinding roller 210, a rotating sleeve rod 220 and a connecting rod 230, the connecting rod 230 is fixedly connected to the transmission shaft 130, the rotating sleeve rod 220 is nested on the transmission shaft 130, the grinding roller 210 is arranged at one end of the rotating sleeve rod 220 away from the connecting rod 230; a transmission rod 240 is arranged between the rotating sleeve rod 220 and the connecting rod 230, the transmission rod 240 includes a first connecting rod 241 and a second connecting rod 242, the first connecting rod 241 is hinged on the connecting rod 230, and the two ends of the second connecting rod 242 are respectively hinged on the first connecting rod 241 and the rotating sleeve rod 220;

[0042] The connecting rod 230 and the transmission shaft 130 keep synchronous movement, and the rotating sleeve rod 220 is nested on the transmission shaft 130. The rotating sleeve rod 220 will keep moving together with the connecting rod 230 under the action of the transmission rod 240. The transmission rod 240 adopts the connecting rod transmission technology. When the transmission rod 240 is deformed when the rotation speed changes, the rotating sleeve rod 220 will pull the rotating sleeve rod 220 to slide along the axial direction of the transmission shaft 130 under the action of the deformation; the grinding roller 210 is suspended above the grinding disc 300. When the grinding roller 210 and the rotating sleeve rod 220 slide during the rotation process, the gap between the grinding roller 210 and the grinding disc 300 will change under the sliding action;

[0043] Through the above functions, during the grinding process, the transmission rod 240 can be deformed to different degrees under the action of centrifugal force by controlling the rotation speed of the transmission shaft 130, so that the gap between the grinding roller 210 and the grinding disc 300 can be actively adjusted to meet the processing needs of different diameters; for example, during the processing, the rotation speed of the transmission shaft 130 can be mainly changed periodically. When the rotation speed of the transmission shaft 130 is low, the gap between the grinding roller 210 and the grinding disc 300 is large, so that large particles can be processed into small particles. When the rotation speed of the transmission shaft 130 is high, the gap between the grinding roller 210 and the grinding disc 300 is small, so that small particles can be processed into finer particles.

[0044] The speed adjustment method allows the processing to be carried out in sections, thereby preventing the grinding roller 210 from being in a fine grinding state for a long time, relieving the processing pressure and improving the processing effect. The segmented processing here mainly relies on the structural characteristics of the vertical roller mill. The material that does not meet the processing particle diameter will be returned to the processing area for reprocessing. With this property, the speed adjustment allows the material to be processed into a semi-finished product first, and then the material is returned for secondary processing, thereby reducing the huge wear and tear caused by the primary processing to the equipment; the speed change curve can be adapted according to the performance particle size of the processing material;

[0045] As a preferred implementation in this embodiment, the transmission shaft 130 is arranged perpendicular to the motor shaft 111 of the driving motor 110, the rotating sleeve rod 220 is arranged parallel to the rotating plane of the grinding disc 300, and the grinding roller 210 is a truncated cone structure; the transmission shaft 130 and the motor shaft 111 are driven by bevel gears and decelerated, thereby reducing the rotation speed of the transmission shaft 130;

[0046] A driving wheel 121 is disposed at the end of the motor shaft 111 of the driving motor 110, and a driven wheel 122 is disposed at one end of the transmission shaft 130 away from the return spring 140, wherein the rotation axis of the driven wheel 122 is perpendicular to the rotation axis of the driving wheel 121;

[0047] In this embodiment, the gap between the side wall of the grinding roller 210 and the grinding disc 300 is an inclined structure, and the grinding roller 210 moves parallel to the rotation plane of the grinding disc 300, so that the gap between the two will change during the movement. Here, the number of transmission shafts 130 is three groups, and the number of the grinding units 200 is the same as the number of transmission shafts 130;

[0048] The transmission rod 240 is deformed as the transmission shaft 130 rotates, and pulls the rotating sleeve rod 220 to change the gap between the grinding roller 210 and the grinding disc 300 .

[0049] In this embodiment, a return spring 140 is further provided at the end of the transmission shaft 130 away from the transmission mechanism 120. A baffle is provided at the end of the transmission shaft 130 away from the transmission mechanism 120. One end of the return spring 140 is connected to the side of the baffle facing the grinding roller 210, and the other end is connected to the grinding roller 210. The return spring 140 generates a pulling force on the end surface of the grinding roller 210 away from the rotating sleeve rod 220, so that the grinding roller 210 maintains a state of being away from the transmission mechanism 120.

[0050] When the transmission rod 240 is deformed during the rotation process and pulls the grinding roller 210 toward the transmission mechanism 120, the return spring 140 starts to store energy. When the transmission rod 240 does not need to generate centripetal force to offset the centrifugal force due to the decrease in rotation speed, the elastic potential energy on the return spring 140 is released and pulls the grinding roller 210 away from the transmission mechanism 120 again, thereby increasing the gap between the grinding roller 210 and the grinding disc 300.

[0051] As a preferred implementation in this embodiment, the transmission shaft 130 is arranged obliquely to the motor shaft 111 of the driving motor 110, the rotating sleeve rod 220 is arranged obliquely to the rotating plane of the grinding disc 300, and the grinding roller 210 is a cylindrical structure; the transmission shaft 130 and the motor shaft 111 are driven by bevel gears and decelerated, thereby reducing the rotation speed of the transmission shaft 130;

[0052] A driving wheel 121 is disposed at the end of the motor shaft 111 of the driving motor 110 , and a driven wheel 122 is disposed at one end of the transmission shaft 130 away from the return spring 140 . The angle between the rotation axis of the driven wheel 122 and the rotation axis of the driving wheel 121 is an obtuse angle.

[0053] In this embodiment, there are three groups of transmission shafts 130, and the number of the grinding units 200 is the same as the number of the transmission shafts 130; the grinding roller 210 moves obliquely to the rotation plane of the grinding disc 300, and when the rotation speed changes, the grinding roller 210 moves along the inclined transmission shaft 130, and the gap between the two changes during the movement. When the grinding roller 210 is inclined to be arranged on the transmission rod 240 and does not need to generate centripetal force to offset the centrifugal force after the rotation speed decreases, the grinding roller 210 automatically moves away from the transmission mechanism 120 under the action of its own weight, thereby increasing the gap between the grinding roller 210 and the grinding disc 300;

[0054] In a further preferred embodiment of the present invention, a counterweight block 243 is provided on the first connecting rod 241, one end of the first connecting rod 241 away from the counterweight block 243 is rotatably connected to the connecting rod 230, and the second connecting rod 242 is rotatably connected to the middle section of the first connecting rod 241;

[0055] In this embodiment, the counterweight 243 mainly increases the centrifugal force generated during the rotation process. When the rotation occurs, the counterweight 243 will move away from the transmission shaft 130 under the centrifugal effect, and the rotation sleeve 220 is pulled to move accordingly by utilizing the centrifugal force to pull the transmission rod 240 to deform. The principle of this process can refer to the movement process of the centrifugal governor. The hinged connection between the first connecting rod 241 and the second connecting rod 242 can also be realized by a sealed bearing member to achieve a rotation connection, which can enhance the structural strength of the connection on the one hand and reduce the influence of the powder on the rotation connection on the other hand.

[0056] As a preferred implementation in this embodiment, the rotating sleeve rod 220 and the grinding roller 210 are both provided with a guide hole for accommodating the transmission shaft 130 to pass through, and the rotating sleeve rod 220 and the grinding roller 210 are elastically connected; the elastic connection between the rotating sleeve rod 220 and the grinding roller 210 allows the grinding roller 210 to have a certain toughness; when the processing process is unstable due to excessive feeding, the grinding roller 210 will actively slide under the thrust generated during the extrusion process to increase the gap between the grinding roller 210 and the grinding disc 300, thereby avoiding material blockage that affects the progress of grinding;

[0057] In the present application, the elastic connection between the rotating sleeve rod 220 and the grinding roller 210 is achieved as follows: the rotating sleeve rod 220 includes a front rod 222, a rear rod 223 and a spring 224, one end of the front rod 222 extends into the interior of the rear rod 223, and the spring 224 is nested outside the front rod 222 and the rear rod 223 and connected to the front rod 222 and the rear rod 223 respectively; the front rod 222 and the rear rod 223 are both provided with a guide hole at the center for accommodating the transmission shaft 130 to pass through;

[0058] The hinge seat 221 is arranged on the front rod 222 , one end of the second connecting rod 242 away from the first connecting rod 241 is hinged on the hinge seat 221 , and one end of the rear rod 223 away from the front rod 222 is connected to the grinding roller 210 .

[0059] In this embodiment, the end of the rear rod 223 away from the grinding roller 210 is provided with a sliding cavity 252 for accommodating the front rod 222, and a limiting ring plate is provided at the end of the sliding cavity 252 to limit the slipping of the front rod 222. The front rod 222 is inserted into the end of the sliding cavity and is also provided with a limiting ring 251. The main function of the spring 224 is to maintain a certain distance between the front rod 222 and the rear rod 223. When subjected to force, the spring 224 can deform to change the relative position of the grinding roller 210. In the absence of external interference, the limiting ring plate and the limiting ring 251 are not in direct contact, providing space for deformation.

[0060] As a preferred implementation in this embodiment, the outer wall of the limit ring 251 is provided with a transmission guide groove, and the inner wall of the sliding cavity 252 is provided with a transmission guide rail adapted to the transmission guide groove. The transmission guide groove slides on the transmission guide rail. When the limit ring 251 slides in the sliding cavity, the transmission guide groove and the transmission guide rail transmit the torque from the front rod 222 to the rear rod 223.

[0061] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A vertical roller mill grinding mechanism, characterized in that: include: A driving mechanism (100) and a grinding disc (300), wherein the driving mechanism (100) is arranged above the grinding disc (300), and a plurality of transmission shafts (130) are arranged on a ring side of the driving mechanism (100); A grinding unit (200), the grinding unit (200) being assembled on a transmission shaft (130), the grinding unit (200) comprising a grinding roller (210), a rotating sleeve rod (220) and a connecting rod (230), the connecting rod (230) being fixedly connected to the transmission shaft (130), the rotating sleeve rod (220) being nested on the transmission shaft (130), and the grinding roller (210) being arranged at one end of the rotating sleeve rod (220) away from the connecting rod (230); A transmission rod (240) is provided between the rotating sleeve rod (220) and the connecting rod (230), and the transmission rod (240) comprises a first connecting rod (241) and a second connecting rod (242), wherein the first connecting rod (241) is hinged on the connecting rod (230), and two ends of the second connecting rod (242) are respectively hinged on the first connecting rod (241) and the rotating sleeve rod (220); The grinding roller (210) is suspended above the grinding disc (300), and the transmission rod (240) deforms as the transmission shaft (130) rotates to pull the rotating sleeve rod (220) to change the gap between the grinding roller (210) and the grinding disc (300).

2. A vertical roller mill grinding mechanism as claimed in claim 1, characterized in that: The driving mechanism (100) comprises a driving motor (110) and a transmission mechanism (120), and the transmission shaft (130) extends out of the transmission mechanism (120) from the ring side of the transmission mechanism (120).

3. A vertical roller mill grinding mechanism as claimed in claim 2, characterized in that: The transmission shaft (130) is arranged perpendicular to the motor shaft (111) of the driving motor (110), the rotating sleeve rod (220) is arranged parallel to the rotation plane of the grinding disc (300), and the grinding roller (210) is a frustum structure.

4. A vertical roller mill grinding mechanism as claimed in claim 3, characterized in that: A driving wheel (121) is provided at the end of the motor shaft (111) of the driving motor (110), and a driven wheel (122) is provided at one end of the transmission shaft (130) away from the return spring (140), wherein the rotation axis of the driven wheel (122) is perpendicular to the rotation axis of the driving wheel (121).

5. A vertical roller mill grinding mechanism as claimed in claim 4, characterized in that: A return spring (140) is also provided at the end of the transmission shaft (130) away from the transmission mechanism (120), and the return spring (140) is connected to the end surface of the grinding roller (210) away from the rotating sleeve rod (220).

6. A vertical roller mill grinding mechanism as claimed in claim 2, characterized in that: The transmission shaft (130) is arranged obliquely to the motor shaft (111) of the driving motor (110), the rotating sleeve rod (220) is arranged obliquely to the rotating plane of the grinding disc (300), and the grinding roller (210) is a cylindrical structure.

7. A vertical roller mill grinding mechanism as claimed in claim 6, characterized in that: A driving wheel (121) is provided at the end of the motor shaft (111) of the driving motor (110), and a driven wheel (122) is provided at one end of the transmission shaft (130) away from the return spring (140), wherein the angle between the rotation axis of the driven wheel (122) and the rotation axis of the driving wheel (121) is an obtuse angle.

8. A vertical roller mill grinding mechanism as claimed in claim 5 or 7, characterized in that: A counterweight block (243) is provided on the first connecting rod (241); one end of the first connecting rod (241) away from the counterweight block (243) is rotatably connected to the connecting rod (230); and the second connecting rod (242) is rotatably connected to the middle section of the first connecting rod (241).

9. A vertical roller mill grinding mechanism as claimed in claim 8, characterized in that: The rotating sleeve rod (220) and the grinding roller (210) are both provided with guide holes for accommodating the transmission shaft (130) to pass through, and the transmission shaft (130) passes through the rotating sleeve rod (220) and the grinding roller (210) through the guide holes, and the rotating sleeve rod (220) and the grinding roller (210) are elastically connected.

10. A vertical roller mill grinding mechanism as claimed in claim 9, characterized in that: The rotating sleeve rod (220) comprises a front rod (222), a rear rod (223) and a spring (224); one end of the front rod (222) extends into the interior of the rear rod (223); the spring (224) is nested outside the front rod (222) and the rear rod (223) and is connected to the front rod (222) and the rear rod (223) respectively; The front rod (222) is provided with a hinge seat (221), one end of the second connecting rod (242) away from the first connecting rod (241) is hinged on the hinge seat (221), and one end of the rear rod (223) away from the front rod (222) is connected to the grinding roller (210).

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