Grinding roller connecting device of medium-speed coal mill

Abstract

The utility model provides a grinding roller connecting device of a medium-speed coal mill, which relates to the technical field of coal mills for thermal power generation and comprises a connecting support and a pin shaft, the pin shaft is hollow inside and is provided with an oil discharge hole for communicating the inner side and the outer side of the pin shaft, one side of the connecting support is provided with an oil supplementing tank, and the other side of the connecting support is provided with an oil discharging hole for communicating the inner side and the outer side of the pin shaft. A piston plate is slidably connected into the oil supplementing tank, a tank opening of the oil supplementing tank faces the pin shaft, and when the micro motor drives the lead screw to rotate, the piston plate is driven to move, lubricating oil in the oil supplementing tank is pushed to enter an internal gap of the pin shaft through the lip sleeve and then reach the outer side of the pin shaft through the oil discharging hole, and continuous lubrication between the pin shaft and a connecting part is achieved. The lubrication problem caused by the fact that pulverized coal absorbs lubricating oil is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mill for thermal power generation, especially to a grinding roller connecting device of medium-speed coal mill. BACKGROUND

[0002] The traditional medium-speed coal mill connects the loading frame and the roller support through a swing device, and its working principle is that the loading frame is driven by a hydraulic cylinder through a pull rod, and the loading frame controls the grinding roller to mill raw coal through more than 20 small parts such as a swing device, a centering support, a loading frame support, a roller frame, and a roller.

[0003] Therefore, the grinding roller connecting device of the existing medium-speed coal mill is disclosed in CN221832490U, the loading frame and the connecting support are fixed through bolts, the connecting support and the grinding roller support are fixed through a pin shaft, and finally the baffle is fixed outside the connecting support, so that the whole is formed through the above-mentioned way, when in use, the loading frame is driven by external power, the loading frame transmits force to the connecting support, so that the grinding roller connected with the grinding roller support is driven to move up and down and swing radially through the connection of the pin shaft and the limitation of the baffle, and due to the arbitrary adjustment of the grinding angle, the ability of different coal types in the milling condition is improved, the time and workload of the traditional coal mill maintenance are reduced, and the work efficiency is improved.

[0004] However, in the use process of the device, the coal powder is scattered in the coal mill, the dry coal powder can absorb the lubricating oil on the surface of the pin shaft, the lubricating property between the pin shaft and the connecting part is reduced, the friction of the pin shaft is increased when rotating, and then the rotation is not sensitive, and the wear of the pin shaft is accelerated. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the prior art and provides a grinding roller connecting device of medium-speed coal mill.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a grinding roller connecting device of medium-speed coal mill, including connecting support and pin shaft, the inside of pin shaft is hollow, the pin shaft is provided with oil discharge hole for connecting the inside and the outside of pin shaft, the one side of connecting support is provided with oil supplement tank, the piston plate is slidably connected in oil supplement tank, the oil supplement tank is provided with U-shaped frame and is fixedly connected with the both sides of the tank mouth, the oil supplement tank is rotatably connected with the screw rod which is screw connected with the piston plate, the screw rod is rotatably connected with U-shaped frame, the oil supplement tank is fixedly connected with the lip sleeve which is installed in one end of pin shaft.

[0007] Preferably, the oil discharge hole is provided with multiple and is uniformly distributed on the side surface of the pin shaft.

[0008] Preferably, the oil supplement tank is fixedly connected with a micro motor on the side away from the connecting support, the micro motor shaft extends through the side wall of the oil supplement tank to the inside of the oil supplement tank, and the through end of the micro motor shaft is fixed with the lead screw.

[0009] Preferably, the lip sleeve is provided with two symmetrically distributed fixing bolts on the side surface, and the fixing bolts are threadedly connected with the pin shaft.

[0010] Preferably, the connecting support is rotatably connected with an annular baffle on one side, and the other end of the annular baffle is fixed with the oil supplement tank through bolts.

[0011] Preferably, the loading frame is further provided, the bottom of the loading frame is provided with a T-shaped groove, a T-shaped block fixed with the connecting support is slidably connected in the T-shaped groove, the side surface of the loading frame is provided with a bolt, and the bolt is throughly arranged in the loading frame and the T-shaped block.

[0012] Compared with the prior art, the utility model has the advantages and positive effects that,

[0013] 1、in the utility model, when the micro motor drives the lead screw to rotate, the piston plate is driven to move, the lubricating oil in the oil supplement tank is pushed into the gap between the pin shaft and the connecting part through the lip sleeve, and then reaches the outside of the pin shaft through the oil discharge hole, so that the continuous lubrication between the pin shaft and the connecting part is realized, and the lubrication problem caused by the coal powder absorbing the lubricating oil is effectively solved.

[0014] 2、in the utility model, the T-shaped groove is arranged in the bottom of the loading frame, the connecting support is slidably connected with the T-shaped groove through the T-shaped block, after the position is adjusted, the bolt is through the loading frame and the T-shaped block, and the relative position of the two is locked, the number of bolts is reduced, and the disassembly efficiency is improved while the stability of the whole grinding roller connecting device is ensured. ACCURACY OF DRAWINGS

[0015] Figure 1 a three-dimensional structure schematic view of the grinding roller connecting device of the medium-speed coal mill is provided in the utility model;

[0016] Figure 2 a three-dimensional structure schematic view of the medium-speed coal mill is provided in the utility model Figure 1 ;

[0017] Figure 3 a three-dimensional structure schematic view of the oil discharge hole is provided in the utility model;

[0018] Figure 4 is Figure 2 an enlarged view of A in the utility model.

[0019] Legend: 1. Loading frame; 2. Lip sleeve; 3. Connecting support; 4. T-block; 5. T-slot; 6. Pin; 7. Annular baffle; 8. Oil tank; 9. Micro motor; 10. Pin shaft; 11. Oil drain hole; 12. Lead screw; 13. Piston plate; 14. U-shaped frame; 15. Fixing bolt. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figures 1-4 As shown, a grinding roller connection device for a medium-speed coal mill includes a connecting support 3 and a pin 10. The pin 10 is hollow inside and has an oil drain hole 11 for connecting the inner side and the outer side of the pin 10. An oil replenishment tank 8 is provided on one side of the connecting support 3. A piston plate 13 is slidably connected inside the oil replenishment tank 8. The opening of the oil replenishment tank 8 faces the pin 10. A U-shaped frame 14 is fixedly connected to the inner side of the oil replenishment tank 8 and on both sides of the opening. A lead screw 12 is rotatably connected to the inner side of the oil replenishment tank 8 and threadedly connected to the piston plate 13. The lead screw 12 is rotatably connected to the U-shaped frame 14. A lip sleeve 2 is fixedly connected to the outer side of the opening of the oil replenishment tank 8 and fitted onto one end of the pin 10. Multiple oil drain holes 11 are provided and evenly distributed on the side of the pin 10.

[0023] In this technical solution, by setting the oil drain hole 11, a channel is provided for the discharge of lubricating oil, so that the lubricating oil can smoothly reach the surface of the pin 10, thereby playing a lubricating role between the pin 10 and the connecting parts. The oil replenishment tank 8 is used to store lubricating oil. The piston plate 13 can slide in the oil replenishment tank 8 under the drive of the lead screw 12, thereby adjusting the output of lubricating oil in the oil replenishment tank 8. The U-shaped frame 14 plays a role in supporting the lead screw 12 and ensuring the stable rotation of the lead screw 12. The lip sleeve 2 is used to fix one end of the pin 10.

[0024] like Figure 2 As shown, a micro motor 9 is fixedly connected to the side of the oil replenishment tank 8 away from the connecting support 3. The main shaft of the micro motor 9 extends through the side wall of the oil replenishment tank 8 into the interior of the oil replenishment tank 8, and the through end of the main shaft of the micro motor 9 is fixed to the lead screw 12.

[0025] In this technical solution, when the micro motor 9 is started, its main shaft drives the lead screw 12 to rotate. When the lead screw 12 rotates, the piston plate 13 will move linearly along the axis of the lead screw 12 in the oil replenishment tank 8. When the piston plate 13 moves towards the pin 10, the lubricating oil in the oil replenishment tank 8 will be pushed by the piston plate 13 and enter the gap inside the pin 10 through the lip sleeve 2, and then enter the outside of the pin 10 through the oil drain hole 11 to achieve lubrication replenishment of the pin 10.

[0026] like Figure 4 As shown, the lip sleeve 2 has two symmetrically distributed fixing bolts 15 on its side. The fixing bolts 15 are threadedly connected to the pin shaft 10. The connecting support 3 has an annular baffle 7 rotatably connected to one side. The other end of the annular baffle 7 is fixed to the oil replenishment tank 8 by bolts.

[0027] In this technical solution, a fixing bolt 15 is used to fix the lip sleeve 2 to the pin shaft 10, and an annular baffle 7 is used to install the oil replenishment tank 8.

[0028] like Figure 1 As shown, it also includes a loading frame 1. The bottom of the loading frame 1 is provided with a T-shaped groove 5. A T-shaped block 4 fixed to the connecting support 3 is slidably connected in the T-shaped groove 5. A pin 6 is provided on the side of the loading frame 1. The pin 6 is connected through the loading frame 1 and the T-shaped block 4.

[0029] In this technical solution, after the T-block 4 slides to the appropriate position in the T-slot 5, the pin 6 is inserted to lock the relative position of the T-block 4 and the loading frame 1, preventing relative displacement between the two during the operation of the coal mill and ensuring the stability of the entire grinding roller connection device.

[0030] Working principle: When the coal mill starts running, the micro motor 9 on one side of the oil replenishment tank 8 is started. The main shaft of the micro motor 9 drives the lead screw 12 to rotate. Since the lead screw 12 is threadedly connected to the piston plate 13, the piston plate 13 will move linearly along the lead screw 12 inside the oil replenishment tank 8. When the piston plate 13 moves towards the pin 10, the lubricating oil stored in the oil replenishment tank 8 will be pushed by the piston plate 13 and enter the gap inside the pin 10 through the lip sleeve 2. Then, the lubricating oil enters the outside of the pin 10 through the oil drain hole 11, realizing the lubrication replenishment between the pin 10 and the connecting parts, reducing the friction when the pin 10 rotates, and reducing wear.

[0031] The wiring diagram of the micro motor 9 in this utility model is common knowledge in the field, and its working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the micro motor 9 will not be explained in detail.

[0032] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A mill roller connection device for a medium speed coal mill comprising a connection bracket (3) and a pin shaft (10), characterized in that: The pin shaft (10) is hollow inside, the pin shaft (10) is provided with oil discharge holes (11) for communicating the inside and outside of the pin shaft (10), one side of the connecting support (3) is provided with an oil supplement tank (8), the oil supplement tank (8) is slidably connected with a piston plate (13), the oil supplement tank (8) is arranged with the pin shaft (10) facing the tank opening, the inside of the oil supplement tank (8) and both sides of the tank opening are fixedly connected with a U-shaped frame (14), the inside of the oil supplement tank (8) is rotatably connected with a lead screw (12) which is threadedly connected with the piston plate (13), the lead screw (12) is rotatably connected with the U-shaped frame (14), the outside of the tank opening of the oil supplement tank (8) is fixedly connected with a lip sleeve (2) which is sleeved and mounted at one end of the pin shaft (10).

2. The roller connecting device of a medium speed coal mill according to claim 1, characterized in that: The oil discharge holes (11) are provided with a plurality of and uniformly distributed on the side surface of the pin shaft (10).

3. The roller connecting device of a medium speed coal mill according to claim 1, characterized in that: The oil supplement tank (8) is fixedly connected with a micro motor (9) away from the connecting support (3), the main shaft of the micro motor (9) extends through the side wall of the oil supplement tank (8) to the inside of the oil supplement tank (8), and the penetrating end of the main shaft of the micro motor (9) is fixedly connected with the lead screw (12).

4. The roller connecting device of a medium speed coal mill according to claim 1, characterized in that: The side surface of the lip sleeve (2) is provided with two symmetrically distributed fixing bolts (15), and the fixing bolts (15) are threadedly connected with the pin shaft (10).

5. The roller connecting device of a medium speed coal mill as claimed in claim 1, wherein: The connecting support (3) is rotatably connected with an annular baffle (7) on one side, and the other end of the annular baffle (7) is fixedly connected with the oil supplement tank (8) through bolts.

6. The roller connecting device of a medium speed coal mill according to claim 1, characterized in that: It also includes a loading rack (1), the bottom of the loading rack (1) is provided with a T-shaped groove (5), the T-shaped groove (5) is slidably connected with a T-shaped block (4) fixedly connected with the connecting support (3), the side surface of the loading rack (1) is provided with a latch (6), and the latch (6) is provided through the loading rack (1) and the T-shaped block (4).

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