A coal mill beater wheel

Abstract

The utility model relates to a coal mill strike wheel belongs to the field of thermal power equipment, including strike wheel main part, wheel hub is equipped on strike wheel main part, the outside fixed connection of wheel hub has two coal equalizing disc, the coal equalizing disc close to wheel hub bottom includes conical disc, the leeward surface of conical disc is equipped with the fixed connection of connecting frame with wheel hub, and conical disc still is equipped with a plurality of mounting frame on the leeward surface of conical disc and is uniformly distributed, the mounting frame is equipped with counterweight according to the need on it, the counterweight weight of the utility model is same, and the distance of counterweight to rotation center can be adjusted to the unbalanced force of different size compensation, guarantee strike wheel main part dynamic balance, and the distance change between bolt I and nut in the utility model can drive counterweight to stay at any position under slide, make the distance of counterweight to rotation center linear change, to be able to adapt to more strike plate wear condition.

Description

TECHNICAL FIELD

[0001] The present application relates to a coal mill beater wheel, belonging to the field of thermal power equipment. BACKGROUND

[0002] The fan mill is a kind of high-efficiency pulverizing equipment integrating coal grinding, drying and conveying functions, and its core component is a high-speed rotating beater wheel. The beater wheel breaks coal blocks during high-speed rotation, which also causes the beater plate on the beater wheel to wear seriously during use.

[0003] However, the wear conditions of any two beater wheels during work are not exactly the same, which makes the beater wheel prone to lose dynamic balance and cause equipment vibration. Therefore, the dynamic balance during manufacturing, installation and maintenance is very strict.

[0004] All beater plates have uniform or non-uniform wear, but have not reached the breaking or falling off stage. The most core and fastest method to deal with such problems is not to replace the beater plate, but to add or subtract counterweight blocks on the correction hole of the beater wheel to offset the unbalanced force. This results in the need to find appropriate counterweight blocks for installation each time, and when new wear conditions occur, appropriate counterweight blocks need to be found again. Moreover, the correction hole is generally fixedly arranged at a position, and when the installation position calculated by the equipment does not coincide with the correction hole, other methods such as welding are needed to install the counterweight block at the corresponding position, which is extremely troublesome, so it is necessary to improve it. SUMMARY

[0005] The present application aims to solve the above problems in the background art and provides a coal mill beater wheel.

[0006] The present application achieves the above-mentioned purpose by adopting the following technical solutions:

[0007] A coal mill beater wheel, comprising a beater wheel body; a hub is arranged on the beater wheel body; two coal equalizing discs are fixedly connected to the outer side of the hub; the coal equalizing disc close to the bottom of the hub comprises a conical disc; a connecting frame fixedly connected with the hub is arranged on the leeward surface of the conical disc, and a plurality of mounting frames uniformly arranged on the leeward surface of the conical disc are further arranged on the conical disc; a counterweight block is mounted on the mounting frame as needed.

[0008] Preferably, each mounting frame comprises a frame body; a slide is arranged on the side of the frame body away from the conical disc, and a through hole transversely penetrating the frame body is arranged on the side surface of the frame body; the through hole is in communication with the slide.

[0009] Preferably, the counterweight block comprises a weight; the upper end of the weight is fixedly connected with a connecting block, the connecting block is in sliding fit with the corresponding slide, and the connecting block is provided with a connecting hole; one side of the frame body is provided with a bolt I penetrating through the connecting hole and a through hole, and the other side of the frame body is provided with a nut connected with the bolt I.

[0010] Preferably, the cross section of the frame body is triangular.

[0011] Preferably, the width of the frame body near the side of the center of the conical disc is smaller than the width of the frame body far from the center of the conical disc.

[0012] Preferably, the counterweight blocks are equal in weight.

[0013] Preferably, the mounting frame is provided with a plurality of.

[0014] Preferably, when the counterweight blocks are simultaneously mounted on the two opposite mounting frames, the counterweight blocks are arranged at different positions of the corresponding slides to balance the moment.

[0015] Preferably, the leeward surface of the conical disc is further provided with a plurality of fixing frames; the fixing frames are provided with holes, the holes are provided with arc-shaped connecting rods in sliding fit therewith; and the two ends of the connecting rods are fixedly connected with the adjacent two mounting frames, respectively.

[0016] Preferably, the side surface of the connecting rod is provided with a plurality of threaded holes I, the fixing frame is provided with a threaded hole II, and the threaded hole II is connected with one of the threaded holes I through a bolt II.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows: the counterweight blocks are equal in weight, the distance of the counterweight blocks to the rotation center can be adjusted to compensate for different sizes of unbalanced force, the dynamic balance of the beating wheel body is ensured, and the distance between the bolt I and the nut in the present application can drive the counterweight block to stop at any position below the slide, so that the distance of the counterweight block to the rotation center changes linearly to adapt to more compensation situations after the beating plate is worn. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional structure schematic view of a beating wheel of a coal mill of the present application;

[0019] Figure 2 is a three-dimensional structure schematic view of a beating wheel of a coal mill of the present application from another direction;

[0020] Figure 3 is a rear view of a coal equalizing disc of a beating wheel of a coal mill of the present application;

[0021] Figure 4 is a three-dimensional structure schematic view of a coal equalizing disc of a beating wheel of a coal mill of the present application;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the coal leveling disc of the coal mill impact wheel according to the present invention from another direction.

[0023] Figure 6 This is a cross-sectional view of a mounting frame for a coal mill impact wheel according to the present invention;

[0024] Figure 7 This is a front view of the connection between the mounting frame and the counterweight of a coal mill impact wheel according to the present invention;

[0025] Figure 8 This is a cross-sectional view of the connection between the mounting frame and the counterweight of a coal mill impact wheel according to the present invention;

[0026] Figure 9 This is a schematic diagram of the connection between the mounting bracket and bolt I of a coal mill impact wheel according to the present invention.

[0027] In the diagram: 1. Impact wheel body; 2. Hub; 3. Coal distribution plate; 31. Conical plate; 32. Connecting frame; 33. Mounting frame; 331. Frame body; 332. Through hole; 333. Slide rail; 34. Fixing frame; 35. Bolt II; 36. Connecting rod; 37. Threaded hole I; 38. Counterweight; 381. Weight; 382. Connecting block; 383. Connecting hole; 384. Bolt I; 385. Nut. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Specific implementation method one: as follows Figures 1-5 As shown, this embodiment describes a coal mill impact wheel, including an impact wheel body 1; a hub 2 is provided on the impact wheel body 1; two coal leveling discs 3 are fixedly connected to the outer side of the hub 2; the coal leveling disc 3 near the bottom of the hub 2 includes a conical disc 31; a connecting frame 32 fixedly connected to the hub 2 is provided on the leeward side of the conical disc 31, and multiple mounting frames 33 evenly distributed on the leeward side of the conical disc 31 are also provided; counterweights 38 are installed on the mounting frames 33 as needed. The counterweights 38 compensate for the unbalanced force caused by wear on the impact plate on the impact wheel body 1. The hub is composed of a hub body and a disc, the hub body adopts a cast structure, and the disc adopts a ring forging structure.

[0030] like Figure 6As shown, each mounting bracket 33 includes a bracket body 331; a slide rail 333 is provided on the side of the bracket body 331 away from the conical disc 31, and a through hole 332 is provided on the side of the bracket body 331, which extends transversely through the bracket body 331; the through hole 332 communicates with the slide rail 333. The bracket body 331, the through hole 332, and the slide rail 333 are all arranged radially along the conical disc 31.

[0031] like Figure 7 , 8 The counterweight 38 shown in Figure 9 includes a weight 381; a connecting block 382 is fixedly connected to the upper end of the weight 381, the connecting block 382 slides with the corresponding slide rail 333, and the connecting block 382 is provided with a connecting hole 383; one side of the frame 331 is provided with a bolt I 384 passing through the connecting hole 383 and the through hole 332, and the other side of the frame 331 is provided with a nut connected to the bolt I 384. By installing the weight 381 at different positions in the slide rail 333, the distance between the weight 381 and the center of rotation can be adjusted, thereby adjusting the magnitude of the countermeasure of the unbalanced force by the weight 381 during the rotation of the system.

[0032] like Figure 3 As shown, the cross-section of the frame 331 is triangular.

[0033] like Figure 3 As shown, the width of the frame 331 on the side closer to the center of the conical disc 31 is smaller than the width of the side of the frame 331 away from the center of the conical disc 31. After the positions of bolt I 384 and nut 385 are fixed, bolt I 384 and nut 385 can only move the weight 381 towards the center of the conical disc 31 (with the positions of bolt I 384 and nut 385 fixed, the width of the side of the frame 331 away from the center of the conical disc 31 increases, exceeding the distance between bolt I 384 and nut 385). However, during operation, the high-speed rotation of the striking wheel body 1 generates centrifugal force, which causes bolt I 384 and nut 385 to move the weight 381 away from the center of the conical disc 31, thereby enabling the weight 381 to reach the predetermined position.

[0034] like Figure 5 As shown, all counterweights 38 have equal weight. Therefore, when installing counterweights 38, only the installation radius needs to be considered.

[0035] like Figures 3-5 As shown, the mounting bracket 33 has an even number of units.

[0036] like Figure 5As shown, when two opposite mounting racks 33 are simultaneously installed with counterweight 38, counterweight 38 is arranged at different positions of corresponding slide 333 to balance the moment of force. Since the installation position of counterweight 38 on slide 333 is determined by the relative position between bolt I 384 and nut 385, the relative position between bolt I 384 and nut 385 changes linearly, and the installation radius of counterweight 38 changes linearly when counterweight 38 moves in the arrangement direction along slide 333, therefore, compared with the preset installation hole in the prior art, the position of counterweight 38 can be more accurately adjusted to compensate for the unbalanced force in the system.

[0037] As shown in the drawings, Figures 3-5 As shown, the leeward side of the conical disc 31 is also provided with a plurality of fixing frames 34; the fixing frame 34 is provided with a hole, and an arc-shaped connecting rod 36 is arranged in the hole in sliding fit; the two ends of the connecting rod 36 are respectively fixedly connected with the adjacent two mounting racks 33.

[0038] As shown in the drawings, Figures 3-5 As shown, the side surface of the connecting rod 36 is provided with a plurality of threaded holes I 137, and the fixing frame 34 is provided with a threaded hole II, and the threaded hole II is connected with one of the threaded holes I 137 through a bolt II 35. By disassembling the bolt II 35, the connecting rod 36 can drive the mounting rack 33 to slide, so as to adjust the position of the mounting rack 33 when a plurality of impact plates are worn, so as to adapt to various situations.

[0039] The working principle of the present application is: when the impact plate on the impact wheel body 1 is worn and affects the dynamic balance of the impact wheel body 1, the device is closed, the connecting block 382 on the weight 381 is inserted into the corresponding slide 333 and through hole 332, and then the weight 381 is fixed through bolt I 384 and nut 385 to complete the counterweight.

[0040] When two opposite impact plates are worn and the wear amount is different, two counterweights 38 can be respectively installed on the mounting racks 33 at the corresponding positions, and the positions of the two counterweights 38 on the slide 333 are adjusted (that is, the distance between the counterweight 38 and the rotation center is adjusted, according to the correction moment = counterweight mass x counterweight installation radius, the counterweight 38 installed at different positions will have different results, if the compensation is more, the installation radius of the counterweight 38 is increased, and vice versa.

[0041] If a plurality of impact plates are worn, the bolt II 35 can be disassembled, then the plurality of mounting racks 33 are rotated to appropriate positions, and then the bolt II 35 is reinstalled in the threaded hole I 137 and the threaded hole II to fix the connecting rod 36, so that the angle of the mounting rack 33 is offset, and the above operation is repeated.

[0042] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other carrier forms without departing from the sprit or essential characteristics of the application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being defined by the appended claims rather than by the foregoing description, and it is therefore intended that all changes that come within the meaning and range of equivalency of the claims are res within the scope of the application. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0043] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A coal pulverizer beater wheel characterized by: Including beat wheel body (1), The wheel body (1) is equipped with wheel hub (2), The wheel hub (2) outside fixed connection has two even coal tray (3), Near the wheel hub (2) bottom even coal tray (3) includes conical tray (31), The leeward surface of conical tray (31) is equipped with the connecting frame (32) of fixed connection with wheel hub (2), conical tray (31) still be equipped with multiple mounting bracket (33) evenly on the leeward surface of conical tray (31), The mounting bracket (33) is according to the need installation counterweight (38) on, Each mounting bracket (33) includes frame body (331), The side of frame body (331) is equipped with slide (333) away from conical tray (31), The side of frame body (331) is equipped with the through hole (332) of traversing frame body (331), Through hole (332) and slide (333) are communicated, The counterweight (38) includes weight (381), The upper end of weight (381) is fixedly connected with connecting block (382), connecting block (382) and corresponding slide (333) slidingly fit, and connecting block (382) is equipped with connecting hole (383), One side of frame body (331) is equipped with bolt I (384) through connecting hole (383), through hole (332), The other side of frame body (331) is equipped with the nut (385) of being connected with bolt I (384), The width of the side of frame body (331) near conical tray (31) center is less than the width of the side of frame body (331) away from conical tray (31) center, The leeward surface of conical tray (31) is still equipped with multiple fixed frame (34), The fixed frame (34) is equipped with hole, and the arc-shaped connecting rod (36) is arranged in the hole and is slidably connected with the hole, The both ends of connecting rod (36) are fixedly connected with two adjacent mounting bracket (33) respectively, The side of connecting rod (36) is equipped with multiple threaded hole I (37), and the fixed frame (34) is equipped with threaded hole II, threaded hole II and one of threaded hole I (37) are connected by bolt II (35).

2. A beater wheel for a coal mill as claimed in claim 1, characterised in that: The cross section of frame body (331) is triangle.

3. A beater wheel for a coal mill as claimed in claim 1, characterised in that: The weight of counterweight (38) is equal.

4. A beater wheel for a coal mill as claimed in claim 3, characterised in that: The mounting bracket (33) is equipped with double number.

5. A beater wheel for a coal mill as claimed in claim 4, characterised in that: When the counterweight (38) is installed on two opposite mounting bracket (33) simultaneously, the counterweight (38) is arranged at different positions of corresponding slide (333) to balance the moment.

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