Anti-falling grinding roller assembly for vertical coal mill

Abstract

The utility model discloses an anti-falling grinding roller assembly for a vertical coal mill, which comprises a roller frame and a roller shaft, and the roller shaft is provided with an extension section penetrating through the roller frame; the end, away from the roller frame, of the extension section is connected with a pressing plate through a first fastening bolt. The extension section is sleeved with a supporting ring sleeve; an anti-falling snap ring groove is formed in the position, close to the roller frame, of the extension section, and an anti-falling snap ring is arranged in the anti-falling snap ring groove; the supporting ring sleeve is provided with a receding ring groove matched with the anti-disengaging clamping ring. According to the utility model, the structure is reasonable, and the structure of combining the high-strength bolt and the anti-drop snap ring is adopted, so that the falling of the roll shaft and the roll sleeve in the production and operation process can be reduced and avoided, and the operation cycle of equipment can be prolonged; the fastening stress of the high-strength first fastening bolt corresponding to the roller frame is conducted, and through the arranged anti-disengaging clamping ring, under the conditions that the first fastening bolt is loosened and the roller shaft sinks, the anti-disengaging clamping ring is immediately stressed to be clamped, the roller shaft is prevented from further sinking and disengaging, and therefore the situation that the roller shaft and a roller sleeve of the roller shaft fall off in the production and operation process is reduced and avoided; and the anti-drop snap ring is tightly sleeved in the support ring sleeve, and the anti-drop snap ring and the support ring sleeve are fastened and connected through the second fastening bolt, so that the anti-drop holding effect can be further achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to an anti-falling grinding roller assembly for a vertical coal mill. Background Art

[0002] The grinding roller device (grinding roller assembly) is a very important part of the vertical coal mill. It mainly uses the extrusion and shearing force generated between the rollers to grind the coal into fine coal powder. Its basic structure is: roller sleeve, grinding roller shaft, roller frame, etc. The fastening and hanging between the roller shaft and the roller frame of the existing grinding roller assembly mainly depends on the bolts fastened to the pressure plate at one end of the roller shaft. Usually, the number of these fastening bolts is 3 (see attached Figure 7 and attached Figure 8 As shown in the figure, the structural schematic diagram of the grinding roller assembly of the prior art), however, the working conditions of the grinding roller are complex and the load is heavy during operation. The lever force between the roller shaft and the roller frame is very large, and the bolts are easy to loosen, which often causes the roller shaft and its roller sleeve to fall off (generally, the bolts will loosen after 2000-3000 hours of operation). Once the roller shaft and its roller sleeve fall off, it is necessary to stop production for maintenance, which affects the operation cycle of the equipment and is not conducive to production. Therefore, it is necessary to improve the prior art and provide a grinding roller assembly that can reduce the fall-off of the roller shaft and its roller sleeve in the grinding roller assembly. Utility Model Content

[0003] Therefore, based on the above background, the utility model provides an anti-dropout grinding roller assembly for a vertical coal mill, which adopts a structure combining high-strength bolts and anti-dropout clamping rings. When the first fastening bolts are loosened and the roller shaft sinks, the anti-dropout clamping rings are immediately forced to lock and prevent the roller shaft from further sinking and falling off, so as to reduce and avoid the roller shaft and its roller sleeve from falling off during production operation, so as to extend the operation cycle of the equipment.

[0004] The technical solution provided by the utility model is:

[0005] An anti-drop-off grinding roller assembly for a vertical coal mill comprises a roller frame and a roller shaft;

[0006] The roller shaft has an extension section passing through the roller frame;

[0007] One end of the extension section away from the roller frame 1 is connected to a pressure plate via a first fastening bolt;

[0008] The outer sleeve of the extension section is provided with a support ring sleeve;

[0009] The extension section is provided with an anti-dropping snap ring groove near the roller frame, and an anti-dropping snap ring is provided in the anti-dropping snap ring groove;

[0010] The support ring sleeve is provided with a relief ring groove adapted to the anti-dropping clamp ring.

[0011] One implementation method is that the left and right end surfaces of the support ring sleeve are in contact with the pressure plate and the roller frame respectively.

[0012] One implementation method is that the anti-dropping clamp ring is two semicircular rings with end faces in contact.

[0013] One implementation method is that the anti-dropping clamp ring is connected to the support ring sleeve via a second fastening bolt.

[0014] One implementation method is that a through wiring groove is provided on the pressure plate and the support ring sleeve.

[0015] One implementation method is that the number of the first fastening bolts is 3, and the model is 10.9 grade M36 high-strength bolts.

[0016] In one implementation, the length of the anti-dropping snap ring groove in the left-right direction is 31 mm, and the depth in the top-bottom direction is 20 mm.

[0017] One implementation method is that the length of the anti-dropping clamp in the left-right direction is 30 mm, and the thickness in the diameter direction is 30 mm.

[0018] In one implementation, the length of the support ring sleeve in the left-right direction is 61 mm, and the thickness in the diameter direction is 21 mm.

[0019] The above technical solution has the following beneficial effects:

[0020] The utility model has a reasonable structure and adopts a structure combining high-strength bolts and anti-dropping clamps, which can reduce and avoid the roller shaft and its roller sleeve falling off during production operation, so as to extend the operation cycle of the equipment: it transmits the fastening stress of the roller frame to the high-strength first fastening bolt through the support ring sleeve located between the pressure plate and the roller frame, and through the anti-dropping clamp, when the first fastening bolt is loosened and the roller shaft sinks, the anti-dropping clamp is immediately forced to be stuck to prevent the roller shaft from further sinking and falling off, so as to reduce and avoid the roller shaft and its roller sleeve falling off during production operation; and the anti-dropping clamp is tightly sleeved in the support ring sleeve, and the anti-dropping clamp is fastened and connected to the support ring sleeve by the second fastening bolt, which can further play the role of anti-dropping and tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0023] Figure 2 The structure of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 3 The structure of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 4 The structure of the utility model is shown in FIG. Figure 3 ;

[0026] Figure 5 The structure of the utility model is shown in FIG. Figure 4 ;

[0027] Figure 6 It is a schematic cross-sectional structure diagram of part of the utility model;

[0028] Figure 7 The structure diagram of the grinding roller assembly of the prior art is shown in FIG. Figure 1 ;

[0029] Figure 8 The structure diagram of the grinding roller assembly of the prior art is shown in FIG. Figure 2 ;

[0030] Fig. 9 It is a schematic cross-sectional structure diagram of part of the prior art. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0034] The utility model is further described below in conjunction with the accompanying drawings.

[0035] The left, right, top and bottom positions mentioned below are all attached. Figure 6 The direction pointed to.

[0036] Example 1: Reference Figure 1 and Figure 6 The vertical coal mill anti-dropping grinding roller assembly shown in the figure comprises a roller frame 1, a roller sleeve 3, and a roller shaft 5. The roller sleeve 3 is sleeved on the roller shaft 5. The roller frame 1 is provided with a through hole adapted to the roller shaft 5 for the roller shaft 5 to be sleeved therein; the roller shaft 5 has an extension section 51 passing through the roller frame 1, that is, the end of the roller shaft away from the roller sleeve passes through the through hole; the end of the extension section 51 away from the roller frame 1 is connected to the pressing plate 4 through the first fastening bolt 8; the extension section 51 is provided with a support ring sleeve 6 on the outer surface; the extension section 51 is provided with an anti-dropping snap ring groove 511 at a position close to the roller frame 1, and an anti-dropping snap ring 7 is provided in the anti-dropping snap ring groove 511; the support ring sleeve 6 is provided with a yielding ring groove 61 adapted to the anti-dropping snap ring 7. The left and right end surfaces of the support ring sleeve 6 are in contact with the pressing plate 4 and the roller frame 1 respectively. The anti-dropping snap ring 7 is two semicircular rings in contact with the end surfaces. The anti-dropping clamp ring 7 is connected to the supporting ring sleeve 6 via a second fastening bolt 9. In specific implementation, the second fastening bolt 9 can be an M10 bolt.

[0037] Specifically, bolt holes that cooperate with the first fastening bolts are provided on the end of the extended section of the roller shaft 5 and the pressure plate 4 .

[0038] And as Figure 2As shown, the extension section 51 and the pressure plate 4 are covered with a protective cover 4, and the protective cover 4 can be installed on the roller frame 1 by bolts to protect the pressure plate and the extension section. More specifically, a fixing ring 11 is fixed to the roller frame 1, and the protective cover 4 is installed on the fixing ring 11 by bolts.

[0039] The pressing plate 4 and the supporting ring sleeve 6 are provided with a through wiring groove 100. Figure 6 As shown, the wiring trough 100 is provided with a temperature measuring line 101, and more specifically, the temperature measuring line 101 is connected to a temperature sensor to detect the temperature.

[0040] The number of the first fastening bolts is 3, and the model is 10.9 grade M36 high-strength bolts. In this embodiment, the length of the anti-slip snap ring groove 511 in the left-right direction is 31 mm, and the depth in the up-down direction is 20 mm. The length of the anti-slip snap ring 7 in the left-right direction is 30 mm, and the thickness in the diameter direction is 30 mm. The length of the support ring sleeve 6 in the left-right direction is 61 mm, and the thickness in the diameter direction is 21 mm. Specifically, the depth of the give way ring groove 61 in the diameter direction is 8 mm, so that the anti-slip snap ring is tightly sleeved in the support ring sleeve.

[0041] The utility model transmits the fastening stress of the roller frame to the high-strength first fastening bolt through the support ring sleeve located between the pressure plate and the roller frame, and through the arranged anti-dropping clamping ring, when the first fastening bolt is loosened and the roller shaft sinks, the anti-dropping clamping ring is immediately forced to be stuck, preventing the roller shaft from further sinking and falling off, so as to reduce and avoid the roller shaft and its roller sleeve from falling off during production operation; and the anti-dropping clamping ring is tightly sleeved in the support ring sleeve, and the anti-dropping clamping ring is fastened and connected to the support ring sleeve by the second fastening bolt, which can further play the role of anti-dropping and tightening.

[0042] Attached Figure 7 To Attachment Fig. 9 The figure shows a schematic diagram of the structure of the grinding roller assembly of the prior art. It can be seen from the figure that one end of the roller shaft 5 does not pass through the roller frame 1, and the end of the roller shaft 5 is located in the roller frame 1. The outer diameter of the pressure plate 4 is larger than the diameter of the through hole. The pressure plate 4 is fastened to the roller shaft 5 by 3 bolts and partially pressed on the roller frame. The difficulty of fastening and hanging between the roller shaft and the roller frame mainly depends on the bolts fastening the roller shaft pressure plate and the roller frame. During the operation of the grinding roller assembly, the load is heavy, and the lifting force between the roller shaft and the roller frame is very large. The roller shaft and the roller sleeve often fall off during operation. However, the frequency of falling off of the roller shaft and the roller sleeve of the improved utility model is greatly reduced. After actual production verification, the utility model has no bolt loosening after running for more than 3000 hours.

[0043] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An anti-drop-off grinding roller assembly for a vertical coal mill, comprising a roller frame and a roller shaft, characterized in that: The roller shaft has an extension section passing through the roller frame; One end of the extension section away from the roller frame is connected to a pressing plate via a first fastening bolt; The outer sleeve of the extension section is provided with a support ring sleeve; The extension section is provided with an anti-dropping snap ring groove near the roller frame, and an anti-dropping snap ring is provided in the anti-dropping snap ring groove; The support ring sleeve is provided with a relief ring groove adapted to the anti-dropping clamp ring.

2. The anti-falling grinding roller assembly for a vertical coal mill according to claim 1, characterized in that: The left and right end surfaces of the support ring sleeve are in contact with the pressure plate and the roller frame respectively.

3. The anti-falling grinding roller assembly for a vertical coal mill according to claim 1, characterized in that: The anti-dropping clamp ring is two semicircular rings with end faces in contact.

4. The anti-falling grinding roller assembly for a vertical coal mill according to claim 1, characterized in that: The anti-dropping clamp ring is connected to the supporting ring sleeve via a second fastening bolt.

5. The anti-falling grinding roller assembly for a vertical coal mill according to claim 1, characterized in that: The pressing plate and the supporting ring sleeve are provided with through wiring grooves.

6. The anti-falling grinding roller assembly for a vertical coal mill according to claim 1, characterized in that: The number of the first fastening bolts is 3.

7. The anti-falling grinding roller assembly for a vertical coal mill according to claim 1, characterized in that: The length of the anti-dropping snap ring groove in the left-right direction is 31 mm, and the depth in the up-down direction is 20 mm.

8. The anti-falling grinding roller assembly for a vertical coal mill according to claim 7, characterized in that: The length of the anti-dropping clamp ring in the left-right direction is 30 mm, and the thickness in the diameter direction is 30 mm.

9. The anti-falling grinding roller assembly for a vertical coal mill according to claim 8, characterized in that: The length of the support ring sleeve in the left-right direction is 61 mm, and the thickness in the diameter direction is 21 mm.

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