Trunnion and grinding roller device with novel structure

Abstract

The utility model provides a novel structure trunnion and grinding roller device, which comprises a grinding roller head and two trunnions respectively arranged on two sides of the grinding roller head, a connecting sleeve is arranged on each grinding roller head, and the trunnions are inserted into the connecting sleeves; in other words, the grinding roller head and the trunnion adopt a socket and spigot type flexible connection structure, so that the bearing capacity requirement of the trunnion and the grinding roller head in the operation working state is met, and the problems that the joint of the grinding roller head and the trunnion is cracked and a bolt is easy to break in the prior art are thoroughly solved; the trunnion and the grinding roller head can be directly mounted and used and can be universally exchanged with other parts, so that the requirements on safety performance and economic performance are met; the bushing is arranged between the trunnion and the grinding roller head to serve as a damping structure, and the bushing is made of a high-temperature-resistant and wear-resistant flexible material, so that the grinding roller head and the trunnion are connected more stably, the matching degree is higher, and the service life is greatly prolonged; even, the service life of the product can be greatly prolonged, the replacement period of spare parts of the coal mill is greatly prolonged, and the operation and maintenance cost of the coal mill can be obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of HP bowl-type medium-speed coal mill, in particular to a trunnion and grinding roller device with a new structure. Background Art

[0002] The ear shaft 2 and the grinding roller device provide continuous grinding force for the coal mill. It is the main grinding part of the coal mill during operation and continuously grinds the coal blocks. The existing structure uses a bolt rigid connection structure between the ear mill and the grinding roller head 1. Figure 1 As shown, when the coal mill is actually in operation, its working vibration is large and the impact fluctuation is large. Even if the bolts are made of the strongest 12.9 grade, they cannot meet the actual working conditions. The bolts may break during actual use, which will cause safety hazards during the operation of the coal mill. Moreover, in the actual use of the coal mill, the step-type rigid connection structure 12 between the ear shaft 2 and the grinding roller head 1 cannot effectively slow down or eliminate the significant impact force generated in a timely manner, which will cause fatigue of the parts and significantly reduce the life span. There is a risk of fracture at the connection of the grinding roller head 1. Utility Model Content

[0003] The utility model provides a trunnion and grinding roller device with a new structure, which can effectively solve the above problems.

[0004] The utility model is achieved in this way:

[0005] A novel ear shaft and grinding roller device comprises a grinding roller head and two ear shafts respectively arranged on both sides of the grinding roller head. The grinding roller head is provided with a connecting sleeve, and the ear shaft is inserted into the connecting sleeve.

[0006] As a further improvement, the grinding roller head is provided with a channel, and the connecting sleeve is plugged into the channel and welded.

[0007] As a further improvement, a plurality of ribs are provided on the outer wall surface of the sleeve close to the grinding roller head, and the ribs are welded to the side wall surface of the grinding roller head.

[0008] As a further improvement, the socket has an insertion hole, and a step is provided at one end of the insertion hole away from the ear shaft.

[0009] As a further improvement, the ear shaft includes a first shaft segment and a second shaft segment connected to the first shaft segment, and the first shaft segment is arranged close to one end of the grinding roller head; a first bushing is arranged on the outer wall surface of the first shaft segment, and the first bushing is inserted into the connecting sleeve along with the first shaft segment.

[0010] As a further improvement, the second shaft section is arranged away from one end of the grinding roller head, the second shaft section is sleeved with an ear shaft sleeve, and a second bushing is arranged between the ear shaft sleeve and the second shaft section.

[0011] As a further improvement, the first bushing and the second bushing are made of high temperature resistant and wear resistant flexible material.

[0012] As a further improvement, a thrust plate is provided on the first shaft section, and when the first shaft section is inserted into the connecting sleeve, the thrust plate is provided between the connecting sleeve and the second shaft section.

[0013] As a further improvement, a trunnion cover is provided on the end surface of the trunnion away from the grinding roller head.

[0014] The beneficial effects of the utility model are as follows: the bearing capacity requirements of the ear shaft and the roller head in the operating state are fully met by adopting a socket-type flexible connection structure between the roller head and the ear shaft, and the problems of cracking at the connection between the roller head and the ear shaft and easy breakage of bolts in the prior art can be completely solved; the ear shaft and the roller head can be directly installed and used, and can be interchangeable with other parts, which can meet both safety performance and economic performance requirements; a bushing is arranged between the ear shaft and the roller head as a shock-absorbing structure, and the bushing is made of high-temperature resistant and wear-resistant flexible material, so that the connection between the roller head and the ear shaft is more stable, the fit is higher, and the service life is greatly improved; it can even greatly increase the service life of the product, greatly increase the spare parts replacement cycle of the coal mill, and significantly reduce the operation and maintenance costs of the coal mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is the prior art of the utility model.

[0017] Figure 2 It is the front view of the embodiment of the utility model.

[0018] Figure 3 It is an axonometric diagram of an embodiment of the utility model.

[0019] Figure 4 It is an exploded view of an embodiment of the utility model.

[0020] Figure 5 It is an axonometric sectional view of an embodiment of the utility model.

[0021] Figure 6 It is a cross-sectional view of an embodiment of the utility model.

[0022] In the figure:

[0023] 1. Grinding roller head; 11. Channel; 2. Ear shaft; 21. First shaft section; 22. Second shaft section; 3. Connecting sleeve; 31. Socket; 32. Step; 4. Rib plate; 5. First bushing; 6. Second bushing; 7. Thrust plate; 8. Ear shaft sleeve; 9. Ear shaft cover. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] In the description of the present invention, 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. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] Reference Figure 2 to Figure 6 As shown, a new structure of ear shaft and grinding roller device includes a grinding roller head 1 and two ear shafts 2 respectively arranged on both sides of the grinding roller head 1. The ear shaft 2 and the grinding roller head 1 provide continuous grinding force for the coal mill.

[0027] In order to ensure that the grinding roller head 1 and the ear shaft 2 have sufficient rigidity when connected, so as to ensure that the coal mill can be sufficiently stable and safe during actual operation, a socket-type flexible connection structure is adopted between the ear shaft 2 and the grinding roller head 1. The socket-type flexible connection structure includes a grinding roller head 1 and an ear shaft 2, and a socket 3 is provided on the grinding roller head 1, and the ear shaft 2 is inserted into the socket 3.

[0028] In order to ensure the stability of the connection between the grinding roller head 1 and the ear shaft 2, the grinding roller head 1 is provided with a channel 11, and the socket 3 is inserted into the channel 11 and welded firmly to each other to ensure the rigidity of the grinding roller device. In addition, a plurality of ribs 4 are provided on the outer wall surface of the socket 3 close to the grinding roller head 1, and the ribs 4 are welded to the side wall surface of the grinding roller head 1. The ribs 4 can strengthen and fix the socket 3 and the grinding roller head 1, ensuring that the effective connection area of ​​the socket 3 and the grinding roller head 1 can be greatly increased, ensuring a large bearing capacity and uniform force.

[0029] In order to make the connection between the grinding roller head 1 and the ear shaft 2 more stable and the fit better, the ear shaft 2 includes a first shaft section 21 and a second shaft section 22 connected to the first shaft section 21, the first shaft section 21 is arranged close to one end of the grinding roller head 1, and the second shaft section 22 is arranged away from one end of the grinding roller head 1; a first bushing 5 is arranged on the outer wall surface of the first shaft section 21, and the first bushing 5 is inserted into the socket 3 along with the first shaft section 21, and when the ear shaft 2 and the socket 3 rotate relative to each other, the first bushing 5 can prevent the wear between the ear shaft 2 and the socket 3; the second shaft section 22 is sleeved with an ear shaft sleeve 8, and a second bushing 6 is arranged between the ear shaft sleeve 8 and the second shaft section 22, and the second bushing 6 can prevent the wear between the ear shaft 2 and the ear shaft sleeve 8.

[0030] Moreover, in order to ensure the accuracy of the connection position between the ear shaft 2, the first bushing 5 and the grinding roller head 1, the sleeve 3 has a socket 31, and a step 32 is provided at the end of the socket 31 away from the ear shaft 2. The ear shaft 2 is inserted into the socket 31 and the step 32 abuts against the end face of the first bushing 5. The first bushing 5 will not fall off and the ear shaft 2 is accurately positioned.

[0031] In order to make the first bushing 5 and the second bushing 6 have strong wear resistance, the first bushing 5 and the second bushing 6 are made of high temperature wear resistant flexible material, and the high temperature wear resistant flexible material has an overload protection function. The first bushing 5 and the second bushing 6 can make the connection between the grinding roller head 1 and the ear shaft 2 more stable and better matched, which can solve the problem in the prior art that the grinding roller head 1 and the bolts are prone to breakage when the coal mill is running, and greatly improve the service life. In this embodiment, the first bushing 5 and the second bushing 6 are made of plastic.

[0032] In addition, a thrust plate 7 is provided on the first shaft section 21. When the first shaft section 21 is inserted into the socket 3, the thrust plate 7 is provided between the socket 3 and the second shaft section 22. The thrust plate 7 can locate the position between the ear shaft 2 and the grinding roller head 1, and can also prevent the first bushing 5 from falling off. A trunnion cover 9 is provided on the end surface of the end of the ear shaft 2 away from the grinding roller head 1. The trunnion cover 9 can prevent the second bushing 6 from falling off from one side of the end surface of the ear shaft 2.

[0033] The utility model adopts a socket-type flexible connection structure between the grinding roller head 1 and the ear shaft 2, which fully meets the bearing capacity requirements of the ear shaft 2 and the grinding roller head 1 in the operating state, and can completely solve the problems of cracking at the connection between the grinding roller head 1 and the ear shaft 2 and easy breakage of bolts in the prior art; the ear shaft 2 and the grinding roller head 1 can be directly installed and used, and can be interchangeable with other parts, which can meet both safety performance and economic performance requirements; a bushing is provided between the ear shaft 2 and the grinding roller head 1 as a shock-absorbing structure, and the bushing is made of high-temperature resistant and wear-resistant flexible material, so that the connection between the grinding roller head and the ear shaft 2 is more stable, the fit is higher, and the service life is greatly improved; it can even greatly increase the service life of the product, greatly increase the spare parts replacement cycle of the coal mill, and significantly reduce the operation and maintenance costs of the coal mill.

[0034] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A novel structure trunnion and grinding roller device, comprising a grinding roller head (1), and two trunnions (2) respectively arranged on both sides of the grinding roller head (1), characterized in that: The ear shaft (2) comprises a first shaft section (21) and a second shaft section (22) connected to the first shaft section (21); the first shaft section (21) is arranged close to one end of the grinding roller head (1); a connecting sleeve (3) is arranged on the grinding roller head (1), and the ear shaft (2) is inserted into the connecting sleeve (3); a thrust plate (7) is arranged on the first shaft section (21); when the first shaft section (21) is inserted into the connecting sleeve (3), the thrust plate (7) is arranged between the connecting sleeve (3) and the second shaft section (22).

2. The novel structure trunnion and grinding roller device according to claim 1 is characterized in that: The grinding roller head (1) is provided with a channel (11), and the connecting sleeve (3) is inserted into the channel (11) and welded.

3. The novel structure trunnion and grinding roller device according to claim 1 or 2, characterized in that: A plurality of rib plates (4) are provided on the outer wall surface of the connecting sleeve (3) close to the grinding roller head (1), and the rib plates (4) are welded to the side wall surface of the grinding roller head (1).

4. The novel structure trunnion and grinding roller device according to claim 1 or 2, characterized in that: The socket (3) has an insertion hole (31), and a step (32) is provided at one end of the insertion hole (31) away from the ear shaft (2).

5. The novel structure trunnion and grinding roller device according to claim 1 or 2, characterized in that: A first bushing (5) is arranged on the outer wall surface of the first shaft section (21), and the first bushing (5) is inserted into the connecting sleeve (3) along with the first shaft section (21).

6. The novel structure of the trunnion and grinding roller device according to claim 5 is characterized in that: The second shaft section (22) is arranged away from one end of the grinding roller head (1), the second shaft section (22) is sleeved with an ear shaft sleeve (8), and a second bushing (6) is arranged between the ear shaft sleeve (8) and the second shaft section (22).

7. The novel structure of the trunnion and grinding roller device according to claim 6 is characterized in that: The first bushing (5) and the second bushing (6) are made of high temperature resistant and wear resistant flexible material.

8. The novel structure of the trunnion and grinding roller device according to claim 6 is characterized in that: A trunnion cover (9) is provided on the end surface of the trunnion (2) away from the grinding roller head (1).

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