Sealing device for dynamic and static ring equipment of coal mill

Abstract

The invention belongs to the technical field of coal mills, and discloses a coal mill dynamic and static ring equipment sealing device which comprises multiple sets of static rings and multiple sets of dynamic rings, the multiple sets of static rings are connected through connecting mechanisms, and sealing mechanisms are arranged on the outer walls of the static rings and the outer walls of the dynamic rings; the sealing mechanism comprises a static sealing ring, a clamping groove is formed in the inner wall of the static sealing ring, an oil tank is fixedly connected to the inner wall of the static sealing ring, a lubricating mechanism is arranged on the inner wall of the oil tank, and a movable sealing ring is arranged on the outer wall of the top end of the movable ring. Through cooperation of structures such as the static sealing ring and the movable sealing ring, when the medium-speed coal mill works to enable the movable sealing ring to rotate, the movable sealing ring can drive the movable sealing ring to synchronously rotate, the movable sealing ring and the static sealing ring are completely sealed, and the sealing effect can be improved; therefore, the problem that the working environment is polluted due to the fact that pulverized coal leaks into the external working environment through a gap between the movable ring and the static ring when the coal mill runs is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mills, in particular to a sealing device for dynamic and static ring equipment of a coal mill. Background Art

[0002] The moving and static rings of the coal mill are important components inside the coal mill, mainly used for sealing and coal powder diversion functions. The moving ring refers to the annular component that rotates with the shaft or other rotating parts during the operation of the coal mill, and the static ring is an annular component fixed on the coal mill casing or stationary bracket and other structures. The moving and static rings cooperate with each other to guide the flow of coal powder and airflow while moving relative to each other.

[0003] During the operation of the coal mill, the dynamic and static rings will expand due to heat due to factors such as friction or temperature. In order to avoid the dynamic and static rings from getting stuck or damaged due to thermal expansion, a certain gap is left between the two. However, when the coal mill is running, coal powder may leak from the gap between the two with the wind, causing pollution to the external working environment and affecting the physical and mental health of the operators. Some existing technologies will set sealing rings on the dynamic ring and the static ring. In order to avoid the friction between the two sets of sealing rings when the dynamic ring rotates and cause loss, a certain gap will still be left between the sealing rings, which only reduces the leakage of coal powder but cannot completely avoid leakage. Therefore, a sealing device for dynamic and static ring equipment of a coal mill is proposed to address the above problems. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a sealing device for the dynamic and static ring equipment of a coal mill, which solves the problem that the existing sealing device still causes partial coal powder leakage.

[0005] To achieve the above object, the present invention provides the following technical solution: a sealing device for a coal mill dynamic and static ring equipment, comprising a static ring and a dynamic ring, wherein the static ring is provided in multiple groups, and the multiple groups of static rings are connected by a connecting mechanism, and the outer walls of the static ring and the dynamic ring are provided with a sealing mechanism; The sealing mechanism includes a static sealing ring, a groove is provided on the inner wall of the static sealing ring, an oil tank is fixedly connected to the inner wall of the static sealing ring, a lubrication mechanism is provided on the inner wall of the oil tank, a dynamic sealing ring is provided on the top outer wall of the dynamic ring, a threaded hole is provided on the outer wall of the dynamic sealing ring, a T-block is fixedly connected to the outer wall of the dynamic sealing ring, a T-slot is provided on the bottom outer wall of the dynamic sealing ring, and a protrusion is fixedly connected to the top outer wall of the dynamic sealing ring.

[0006] Preferably, the static sealing ring is fixedly connected to the outer wall of the static ring, and the static sealing ring contacts the outer wall of the dynamic sealing ring.

[0007] Preferably, the lubrication mechanism includes an extrusion plate, the outer wall of the extrusion plate is fixedly connected to a connecting rod, the inner wall of the static sealing ring is slidably connected to a triangular block, the outer wall of the triangular block is fixedly connected to a moving block, the outer wall of the moving block is fixedly connected to a connecting spring, the inner wall of the static sealing ring is elastically connected to a rotating shaft via a volute spring, a traction rope is wound around the outer wall of the rotating shaft, the outer wall of the rotating shaft is fixedly connected to a ball valve, and the outer wall of the bottom end of the ball valve is fixedly connected to a baffle.

[0008] Preferably, the extrusion plate is slidably connected to the inner wall of the oil tank, the connecting rod is slidably connected to the inner walls of the oil tank and the static sealing ring, and the connecting rod is slidably connected to the outer wall of the triangular block.

[0009] Preferably, the connecting spring is fixedly connected to the inner wall of the static sealing ring, the moving block is slidingly connected to the inner wall of the static sealing ring, and the rotating shaft is rotatably connected to the inner wall of the static sealing ring.

[0010] Preferably, one end of the volute spring is fixedly connected to the outer wall of the rotating shaft, the other end of the volute spring is fixedly connected to the inner wall of the static sealing ring, the rotating shaft passes through the outer wall of the oil tank, and the traction rope is fixedly connected to the outer wall of the moving block.

[0011] Preferably, the connecting mechanism includes a connecting block, the inner wall of the connecting block is elastically connected to a pull rod via a return spring, the outer wall of the pull rod is hinged to a clamping block via a hinge rod, the top outer wall of the connecting block is fixedly connected to a fixing block, and the inner wall of the fixing block is elastically connected to a stopper via a telescopic spring.

[0012] Preferably, the connecting block contacts the inner wall of the static sealing ring, one end of the reset spring is fixedly connected to the outer wall of the pull rod, the other end of the reset spring is fixedly connected to the inner wall of the connecting block, and the outer wall of the pull rod is slidably connected to the inner wall of the connecting block.

[0013] Preferably, one end of the hinged rod is hinged to the outer wall of the pull rod, the other end of the hinged rod is hinged to the outer wall of the clamping block, the clamping block is slidably connected to the inner wall of the connecting block, and the clamping block is clamped to the clamping slot.

[0014] Preferably, one end of the telescopic spring is fixedly connected to the outer wall of the stopper, the other end of the telescopic spring is fixedly connected to the inner wall of the fixed block, the outer wall of the stopper is slidably connected to the inner wall of the fixed block, and the stopper is in contact with the pull rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a combination of structures such as a static sealing ring and a dynamic sealing ring. When the medium-speed coal mill is working and the dynamic ring is rotated, the dynamic ring can drive the dynamic sealing ring to rotate synchronously. The dynamic sealing ring and the static sealing ring are completely sealed, which can improve the sealing effect, thereby avoiding the problem of coal powder leaking into the external working environment through the gap between the dynamic ring and the static ring when the coal mill is running, causing pollution to the working environment. The present invention provides a ball valve and an oil tank and other structures to cooperate. When the dynamic ring drives the dynamic sealing ring to rotate, the convex block can squeeze the baffle plate, so that the baffle plate drives the ball valve to flip, and the opening below the oil tank is opened, so that the lubricating oil can drip onto the dynamic sealing ring. During the rotation process, the friction between the dynamic sealing ring and the static sealing ring can be reduced, and the loss caused by friction can be reduced, thereby increasing the overall service life of the sealing mechanism. The present invention provides the cooperation of structures such as the triangular block and the extrusion plate. When the ball valve and the rotating shaft are turned over, the moving block and the triangular block can be pulled downward by the traction rope, and the connecting rod is squeezed to drive the extrusion plate to move in the inner wall of the oil tank, so as to generate pressure on the lubricating oil, thereby accelerating the outflow of the lubricating oil, thereby avoiding the problem of reduced oil output and affected lubrication effect due to low internal pressure or less oil in the oil tank; The present invention cooperates with structures such as connecting blocks and clamping blocks, inserts the connecting block between the two groups of static sealing rings, and presses the pull rod to move the two groups of clamping blocks to engage with the clamping grooves. The two groups of static sealing rings can be initially fixed through the connecting mechanism, thereby improving the stability of the static sealing rings when they are further fixed by bolts or other methods in the later stage, so as to avoid the problem of offset affecting installation and fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the structure of the static ring, the dynamic ring, and the sealing mechanism of the present invention; Figure 3 It is a cross section of the static sealing ring and a schematic diagram of the structure after the dynamic sealing ring is exploded according to the present invention; Figure 4 It is a schematic diagram of the cross section of the static sealing ring and the structure of the lubrication mechanism of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the cross-sectional structure of the connecting block of the present invention; Figure 7 It is a schematic diagram of the cross section of the connecting block and the static sealing ring structure of the present invention.

[0017] In the figure: 1. static ring; 2. dynamic ring; 3. sealing mechanism; 301. static sealing ring; 302. dynamic sealing ring; 303. threaded hole; 304. T-block; 305. T-slot; 306. bump; 307. oil tank; 4. connecting mechanism; 401. connecting block; 402. return spring; 403. pull rod; 404. hinged rod; 405. clamping block; 406. fixed block; 407. telescopic spring; 408. stopper; 501. extrusion plate; 502. connecting rod; 503. triangular block; 504. moving block; 505. connecting spring; 506. traction rope; 507. rotating shaft; 508. scroll spring; 509. ball valve; 510. baffle; 6. clamping slot. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 7 As shown, the present invention provides a sealing device for a coal mill dynamic and static ring equipment, comprising a static ring 1 and a dynamic ring 2, wherein the static ring 1 is provided with multiple groups, and the multiple groups of static rings 1 are connected by a connecting mechanism 4, and the outer walls of the static ring 1 and the dynamic ring 2 are provided with a sealing mechanism 3; the sealing mechanism 3 comprises a static sealing ring 301, the inner wall of the static sealing ring 301 is provided with a clamping groove 6, the inner wall of the static sealing ring 301 is fixedly connected with an oil tank 307, and the inner wall of the oil tank 307 is provided with a lubrication mechanism, the top outer wall of the dynamic ring 2 is provided with a dynamic sealing ring 302, the outer wall of the dynamic sealing ring 302 is provided with a threaded hole 303, the outer wall of the dynamic sealing ring 302 is fixedly connected with a T-block 304, the bottom outer wall of the dynamic sealing ring 302 is provided with a T-slot 305, and the top outer wall of the dynamic sealing ring 302 is fixedly connected with a protrusion 306; the static sealing ring 301 is fixedly connected to the outer wall of the static ring 1, and the static sealing ring 301 contacts the outer wall of the dynamic sealing ring 302.

[0020] The above scheme is adopted: the static ring 1 and the dynamic ring 2 constitute the main body of the dynamic and static ring equipment used in the medium-speed coal mill, which is the existing technology. The dynamic ring 2 is installed on the grinding disc of the coal mill, and the static ring 1 is installed on the inner side of the outer shell of the coal mill, and a guide area is formed between the dynamic ring 2 and the static ring 1 at a position corresponding to the dynamic ring 2, and a certain gap is left to prevent the dynamic ring 2 and the static ring 1 from being stuck or damaged due to heat expansion caused by friction, internal medium temperature and other factors during operation; the sealing mechanism 3 set on the dynamic ring 2 and the static ring 1 can further seal the dynamic ring 2 and the static ring 1 to prevent coal powder leakage from polluting the working environment, the static sealing ring 301 is installed on the static ring 1, and the dynamic sealing ring 302 is installed on the dynamic ring 2. When the dynamic ring 2 rotates, the dynamic sealing ring 302 rotates synchronously with it, and the dynamic sealing ring 302 is inserted In the bottom cavity of the static sealing ring 301, its top end does not contact the inner wall of the cavity, which ensures the sealing effect while reducing the contact area. When the dynamic sealing ring 302 rotates, the lubrication mechanism can continuously discharge oil for lubrication, reducing the friction between the dynamic sealing ring 302 and the static sealing ring 301, reducing the wear and tear, and improving the service life. Through the connecting mechanism 4, when installing the static sealing ring 301, it can be preliminarily fixed, and after the preliminary fixation is completed, it can be further fixed by bolts and other existing technologies to avoid the static sealing ring 301 from shifting during installation and affecting the installation process. The dynamic sealing ring 302 can clamp the T-block 304 and the T-slot 305 between the two groups of dynamic sealing rings 302 for preliminary fixation, and then directly fix it on the dynamic ring 2 by passing the bolts through the threaded hole 303, which is more convenient.

[0021] like Figure 4 and Figure 5 As shown, the lubrication mechanism includes an extrusion plate 501, the outer wall of the extrusion plate 501 is fixedly connected to a connecting rod 502, the inner wall of the static sealing ring 301 is slidably connected to a triangular block 503, the outer wall of the triangular block 503 is fixedly connected to a moving block 504, the outer wall of the moving block 504 is fixedly connected to a connecting spring 505, the inner wall of the static sealing ring 301 is elastically connected to a rotating shaft 507 through a volute spring 508, a traction rope 506 is wound around the outer wall of the rotating shaft 507, the outer wall of the rotating shaft 507 is fixedly connected to a ball valve 509, and the outer wall of the bottom end of the ball valve 509 is fixedly connected to a baffle 510.

[0022] The above scheme is adopted: through the lubrication mechanism, when the dynamic seal ring 302 rotates with the dynamic ring 2, oil can be continuously discharged and dripped into the cavity between the dynamic seal ring 302 and the static seal ring 301, so as to lubricate the dynamic seal ring 302 and the static seal ring 301 and reduce wear; the lubricating oil can be stored in the oil tank 307, and when not affected by external forces, the two closed sides of the ball valve 509 at the bottom of the oil tank 307 are in the state of the upper and lower sides, and the two open sides are in the horizontal state, so that the bottom opening of the oil tank 307 can be closed, and the baffle 510 is in a downward vertical state at this time; when the dynamic seal ring 302 rotates, the protrusion 306 contacts and squeezes the baffle 510, so that It rotates synchronously with the ball valve 509 around the rotating shaft 507. The rotating shaft 507 rotates synchronously, driving the volute spring 508 to be forced to contract, so that the openings on both sides of the ball valve 509 can be rotated to correspond to the opening position at the bottom end of the oil tank 307. At this time, the lubricating oil can flow downward from the opening of the ball valve 509 and the oil tank 307 to the dynamic sealing ring 302, and lubricates during the rotation process; when the dynamic sealing ring 302 rotates until the protrusion 306 is out of contact with the baffle 510, the volute spring 508 is reset due to its own elastic force, and drives the rotating shaft 507 to rotate in the opposite direction, so that the ball valve 509 is rotated and reset and the opening below the oil tank 307 is kept closed, so that the oil discharge can be stopped and the initial state is maintained.

[0023] like Figure 4 and Figure 5 As shown, the extrusion plate 501 is slidably connected to the inner wall of the oil tank 307, the connecting rod 502 is slidably connected to the inner walls of the oil tank 307 and the static sealing ring 301, and the connecting rod 502 is slidably connected to the outer wall of the triangular block 503; the connecting spring 505 is fixedly connected to the inner wall of the static sealing ring 301, the moving block 504 is slidably connected to the inner wall of the static sealing ring 301, and the rotating shaft 507 is rotatably connected to the inner wall of the static sealing ring 301; one end of the volute spring 508 is fixedly connected to the outer wall of the rotating shaft 507, and the other end of the volute spring 508 is fixedly connected to the inner wall of the static sealing ring 301, the rotating shaft 507 passes through the outer wall of the oil tank 307, and the traction rope 506 is fixedly connected to the outer wall of the moving block 504.

[0024] The above scheme is adopted: when not affected by external forces, the connecting spring 505 keeps the triangular block 503 fixed due to its own elastic force, one end of the connecting rod 502 keeps in contact with the bottom inclined surface of the triangular block 503, and the extrusion plate 501 fits with one side of the oil tank 307; when the protrusion 306 squeezes the baffle 510, causing the ball valve 509 and the rotating shaft 507 to rotate, the rotating shaft 507 pulls the traction rope 506 and the fixed end of the moving block 504 to move downward, driving the moving block 504 to move downward synchronously, and the triangular block 503 The connecting spring 505 moves synchronously and is stretched by force. When the triangular block 503 moves, its inclined surface squeezes the connecting rod 502, so that the connecting rod 502 moves along the inclined surface to the top of the triangular block 503, and pushes the squeezing plate 501 to move synchronously. The squeezing plate 501 can generate pressure on the lubricating oil in the oil tank 307, so that the lubricating oil can drip from the outlet faster, thereby avoiding the problem that the lubricating oil may drip slowly when the opening below the oil tank 307 is opened due to insufficient pressure in the oil tank 307, and the lubricating effect cannot be effectively achieved.

[0025] like Figure 6 and Figure 7 As shown, the connecting mechanism 4 includes a connecting block 401, the inner wall of the connecting block 401 is elastically connected to a pull rod 403 through a reset spring 402, the outer wall of the pull rod 403 is hinged to a clamping block 405 through a hinge rod 404, the top outer wall of the connecting block 401 is fixedly connected to a fixing block 406, and the inner wall of the fixing block 406 is elastically connected to a stopper 408 through a telescopic spring 407.

[0026] By adopting the above scheme: the two groups of static sealing rings 301 can be preliminarily fixed together through the connecting mechanism 4, and all the multiple groups of static sealing rings 301 can be fixed together. When further fixed together by bolts or other means at a later stage, the multiple groups of static sealing rings 301 will not be offset in installation, or will not correspond to the position of the dynamic sealing ring 302; the two groups of clamping blocks 405 in the connecting block 401 are clamped with the inner wall clamping grooves 6 of the static sealing rings 301 on both sides, so that the positions of the two groups of static sealing rings 301 can be fixed, which is convenient for further fixing and connection at a later stage; two groups of hinged rods 404 and clamping blocks 405 are provided, which are symmetrically distributed on the inner walls of both sides of the connecting block 401. When not affected by external forces, the reset spring 402 keeps the pull rod 403 in an upper state due to its own elastic force, and the two groups of hinged rods 404 are close to a vertical state, such as Figure 6 shown.

[0027] like Figure 6 and Figure 7As shown, the connecting block 401 contacts the inner wall of the static sealing ring 301, one end of the reset spring 402 is fixedly connected to the outer wall of the pull rod 403, the other end of the reset spring 402 is fixedly connected to the inner wall of the connecting block 401, and the outer wall of the pull rod 403 is slidably connected to the inner wall of the connecting block 401; one end of the hinged rod 404 is hinged to the outer wall of the pull rod 403, the other end of the hinged rod 404 is hinged to the outer wall of the clamping block 405, the clamping block 405 is slidably connected to the inner wall of the connecting block 401, and the clamping block 405 is clamped to the slot 6; one end of the telescopic spring 407 is fixedly connected to the outer wall of the stopper 408, the other end of the telescopic spring 407 is fixedly connected to the inner wall of the fixed block 406, the outer wall of the stopper 408 is slidably connected to the inner wall of the fixed block 406, and the stopper 408 contacts the pull rod 403.

[0028] The above scheme is adopted: when the pull rod 403 is pressed downward, the return spring 402 is forced to shrink, and the two groups of hinged rods 404 move downward accordingly. Since the block 405 fixed at one end of the hinged rod 404 is slidably connected to the inner wall of the connecting block 401, it can only move horizontally. Therefore, during the downward movement of the hinged rod 404, it can be flipped to both sides at the same time, driving the two groups of blocks 405 to move synchronously to both sides and engage with the two groups of slots 6, so that the two groups of static sealing rings 301 can be fixed to a certain extent; during the movement of the pull rod 403, the outer wall of its top end squeezes the arc surface of the block 408, so that the block 408 moves to the fixed block 40 6, the telescopic spring 407 is forced to shrink, and when the pull rod 403 moves to the point where the outer wall of its top end is under the stop block 408, the telescopic spring 407 causes the stop block 408 to pop out due to its own elastic force, and the straight surface of the stop block 408 contacts the top end of the pull rod 403 to limit it, thereby maintaining the two groups of blocks 405 in a fixed state and maintaining the engagement with the slots 6 on both sides; when the operator has completed the connection of multiple groups of static sealing rings 301 through the connecting mechanism 4, the block 405 can be initially fixed by engaging the slot 6 to prevent it from shifting, thereby avoiding the problem of the position being easily misplaced during further fixation in the later stage and affecting the installation.

[0029] The working principle and use process of the present invention: The static sealing ring 301 is installed on the outer wall of the static ring 1, and the dynamic sealing ring 302 is installed on the outer wall of the dynamic ring 2. The dynamic sealing ring 302 can be initially fixed by clamping the T-block 304 between the two groups with the T-slot 305, and then fixed to the dynamic ring 2 by bolts passing through the threaded holes 303; the connecting mechanism 4 is used to initially fix multiple groups of static sealing rings 301, which can be further fixed by bolts or the like at a later stage.

[0030] The operator can first place the two groups of static sealing rings 301 on the static ring 1, and insert the connecting block 401 between the two groups of static sealing rings 301. At this time, the two groups of clamping blocks 405 in the connecting block 401 are inside the connecting block 401; when the connecting block 401 is fully inserted between the two groups of static sealing rings 301, the connecting block 401 can be rotated and the pull rod 403 can be pressed downward. When the two groups of clamping blocks 405 are rotated to correspond to the position of the clamping groove 6, the reset spring 402 is forced to shrink, and the two groups of hinged rods 404 move downward and flip to both sides, driving the two groups of clamping blocks 405 to move synchronously to both sides, and clamp with the two groups of clamping grooves 6, so that the two groups of static sealing rings 301 are initially fixed.

[0031] During the movement of the pull rod 403, the outer wall of its top end squeezes the arc surface of the block 408, causing the block 408 to move to the inner wall of the fixed block 406, and the telescopic spring 407 is forced to shrink; when the pull rod 403 moves to the point where its top outer wall is below the block 408, the telescopic spring 407 causes the block 408 to pop out due to its own elastic force, and the straight surface of the block 408 contacts the top of the pull rod 403 to limit it, thereby keeping the two groups of blocks 405 in a fixed state and maintaining the engagement with the slots 6 on both sides; in this way, after the operator has connected all the groups of static sealing rings 301 through the connecting mechanism 4, they can initially fix them by engaging the block 405 with the slot 6 to prevent the position from being misaligned and affecting the installation during further fixation in the later stage. After completion, they can be further installed and fixed by existing technologies such as bolts.

[0032] When the medium-speed coal mill is started and the grinding disc drives the dynamic ring 2 to rotate, the dynamic sealing ring 302 rotates synchronously therewith, driving the protrusion 306 to continuously contact and squeeze the baffle 510, so that the baffle 510 and the ball valve 509 rotate synchronously with the rotating shaft 507 as the center, and the rotation of the rotating shaft 507 drives the volute spring 508 to contract under force; at this time, the openings on both sides of the ball valve 509 rotate to correspond to the opening position at the bottom end of the oil tank 307, and the lubricating oil flows downward from the openings of the ball valve 509 and the oil tank 307 to the dynamic sealing ring 302. During the rotation process, the dynamic sealing ring 302 and the static sealing ring 301 can be lubricated, thereby reducing the friction between the dynamic sealing ring 302 and the static sealing ring 301 and reducing the loss.

[0033] And in the above process, when the protrusion 306 squeezes the baffle 510 to rotate the ball valve 509 and the rotating shaft 507, the rotating shaft 507 pulls the traction rope 506 and the fixed end of the moving block 504 to move downward, driving the moving block 504 to move downward synchronously, so that the connecting spring 505 is stretched, and the triangular block 503 moves synchronously, and its inclined surface squeezes the connecting rod 502, so that the connecting rod 502 moves along the inclined surface to the top of the triangular block 503, and pushes the squeezing plate 501 to move synchronously; the squeezing plate 501 generates pressure on the lubricating oil in the oil tank 307, so that the lubricating oil drips from the outlet faster, avoiding the problem of insufficient pressure in the oil tank 307 or less oil volume resulting in a slow dripping speed of the lubricating oil and ineffective lubrication.

[0034] When the dynamic sealing ring 302 rotates until the protrusion 306 is out of contact with the baffle 510, the volute spring 508 is reset due to its own elastic force and drives the rotating shaft 507 to rotate in the opposite direction, so that the ball valve 509 rotates and resets and keeps the opening below the oil tank 307 closed, and the oil discharge stops; when the rotating shaft 507 rotates in the opposite direction, the traction rope 506 releases the pulling force on the moving block 504, and the triangular block 503 and the moving block 504 move and reset synchronously under the elastic force of the connecting spring 505, so that the connecting rod 502 contacts the bottom end of the inclined surface of the triangular block 503 again, driving the extrusion plate 501 to move and reset, thereby completely restoring the initial state.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for a coal mill moving and stationary ring equipment, comprising a stationary ring (1) and a moving ring (2), characterized in that: The stationary rings (1) are provided in multiple groups, and the multiple groups of stationary rings (1) are connected via a connecting mechanism (4); the outer walls of the stationary rings (1) and the dynamic rings (2) are provided with sealing mechanisms (3); The sealing mechanism (3) comprises a static sealing ring (301), the inner wall of the static sealing ring (301) is provided with a clamping groove (6), the inner wall of the static sealing ring (301) is fixedly connected to an oil tank (307), the inner wall of the oil tank (307) is provided with a lubrication mechanism, the top outer wall of the dynamic ring (2) is provided with a dynamic sealing ring (302), the outer wall of the dynamic sealing ring (302) is provided with a threaded hole (303), the outer wall of the dynamic sealing ring (302) is fixedly connected to a T-shaped block (304), the bottom outer wall of the dynamic sealing ring (302) is provided with a T-shaped groove (305), and the top outer wall of the dynamic sealing ring (302) is fixedly connected to a protrusion (306).

2. The sealing device for the dynamic and static ring equipment of a coal mill according to claim 1 is characterized in that: The static sealing ring (301) is fixedly connected to the outer wall of the static ring (1), and the static sealing ring (301) is in contact with the outer wall of the dynamic sealing ring (302).

3. The sealing device for the dynamic and static ring equipment of a coal mill according to claim 1 is characterized in that: The lubrication mechanism comprises an extrusion plate (501), the outer wall of the extrusion plate (501) is fixedly connected to a connecting rod (502), the inner wall of the static sealing ring (301) is slidably connected to a triangular block (503), the outer wall of the triangular block (503) is fixedly connected to a moving block (504), the outer wall of the moving block (504) is fixedly connected to a connecting spring (505), the inner wall of the static sealing ring (301) is elastically connected to a rotating shaft (507) via a volute spring (508), a traction rope (506) is wound around the outer wall of the rotating shaft (507), the outer wall of the rotating shaft (507) is fixedly connected to a ball valve (509), and the outer wall of the bottom end of the ball valve (509) is fixedly connected to a baffle (510).

4. The sealing device for the dynamic and static rings of a coal mill according to claim 3 is characterized in that: The extrusion plate (501) is slidably connected to the inner wall of the oil tank (307), the connecting rod (502) is slidably connected to the inner wall of the oil tank (307) and the static sealing ring (301), and the connecting rod (502) is slidably connected to the outer wall of the triangular block (503).

5. The sealing device for the dynamic and static rings of a coal mill according to claim 3 is characterized in that: The connecting spring (505) is fixedly connected to the inner wall of the static sealing ring (301), the moving block (504) is slidably connected to the inner wall of the static sealing ring (301), and the rotating shaft (507) is rotatably connected to the inner wall of the static sealing ring (301).

6. The sealing device for the dynamic and static rings of a coal mill according to claim 3, characterized in that: One end of the scroll spring (508) is fixedly connected to the outer wall of the rotating shaft (507), and the other end of the scroll spring (508) is fixedly connected to the inner wall of the static sealing ring (301). The rotating shaft (507) passes through the outer wall of the oil tank (307), and the traction rope (506) is fixedly connected to the outer wall of the moving block (504).

7. The sealing device for the dynamic and static ring equipment of a coal mill according to claim 1, characterized in that: The connecting mechanism (4) comprises a connecting block (401), the inner wall of the connecting block (401) being elastically connected to a pull rod (403) via a return spring (402), the outer wall of the pull rod (403) being hinged to a clamping block (405) via a hinge rod (404), the top outer wall of the connecting block (401) being fixedly connected to a fixing block (406), and the inner wall of the fixing block (406) being elastically connected to a stopper (408) via a telescopic spring (407).

8. The sealing device for the dynamic and static rings of a coal mill according to claim 7, characterized in that: The connecting block (401) contacts the inner wall of the static sealing ring (301), one end of the return spring (402) is fixedly connected to the outer wall of the pull rod (403), the other end of the return spring (402) is fixedly connected to the inner wall of the connecting block (401), and the outer wall of the pull rod (403) is slidably connected to the inner wall of the connecting block (401).

9. The sealing device for the dynamic and static rings of a coal mill according to claim 7, characterized in that: One end of the hinged rod (404) is hinged to the outer wall of the pull rod (403), and the other end of the hinged rod (404) is hinged to the outer wall of the clamping block (405). The clamping block (405) is slidably connected to the inner wall of the connecting block (401), and the clamping block (405) is clamped to the clamping slot (6).

10. The sealing device for the dynamic and static rings of a coal mill according to claim 7, characterized in that: One end of the telescopic spring (407) is fixedly connected to the outer wall of the stopper (408), and the other end of the telescopic spring (407) is fixedly connected to the inner wall of the fixed block (406). The outer wall of the stopper (408) is slidably connected to the inner wall of the fixed block (406), and the stopper (408) is in contact with the pull rod (403).

Images