Suitable for straightening rollers in harsh and dusty environments

Abstract

A straightening roller suitable for harsh environments with much dust, wherein the two ends of the roller shaft are inserted into the inner hole of the straightening roller flange, and the two ends of the roller sleeve are sleeved on the outside of the middle part of the roller shaft through the bearing assembly, and the bearing assembly includes a bearing and a gland assembly installed at both ends of the bearing, and the gland assembly includes a gland 1 installed at the outer end of the bearing and a gland 2 installed at the inner end of the bearing, the outer ring of the gland 1 is interference fit with the inner ring of the roller sleeve, and a skeleton oil seal is installed in the middle of the inner ring of the gland 1, and the inner ring of the skeleton oil seal is connected to the roller shaft in a dynamic seal; there is an oil cavity on the inner side of the skeleton oil seal, and there is an air cavity arranged opposite to the oil cavity on the outer side of the skeleton oil seal, and there is an air cavity outlet on the outer side of the air cavity. The utility model solves the problem that the straightening roller is often easily burned due to dust accumulation at the bearing position and the sealing position of the straightening roller and has a short service life by adding a high-pressure air pipe, effectively preventing dust and other debris from entering the straightening roller, and prolonging the service life of the straightening roller.

Description

Technical Field

[0001] The utility model relates to straightening equipment, in particular to a straightening roller. Background Art

[0002] As the customer's on-site environment and the plate and strip dust are increasing, the service life of the straightening roller on the straightening machine is getting shorter and shorter. The straightening roller is often easy to burn out. The main problem is that the straightening roller bearing and sealing position are often easy to accumulate dust, which leads to the burning of the straightening roller. Spare parts need to be fully prepared. The Chinese patent (Announcement No. CN 205118238 U, Announcement Date 2016.03.30) discloses a dustproof sealing device for the roller box support roller of a dry scale breaker. During use, the air source continuously supplies air, and the gas is continuously discharged through the air holes on the hollow shaft of the support roller. At the discharge position, the positive pressure generated forms an air seal to prevent dust and other debris from entering the inside of the support roller. The support roller is thin and short (about 200mm in length) and is used on the roller box of the equipment. Usually, the support roller is used in combination of multiple groups. The layout and number of the support rollers are determined according to the width of the equipment. The straightening roller is thick and long (about 2000mm in length) and is usually two. One is set at the outlet and inlet of the straightening equipment. Therefore, the structure of the hollow shaft of the support roller cannot be applied to the straightening roller. Summary of the invention

[0003] The purpose of the utility model is to overcome the problems of high damage rate of straightening rollers and high cost of spare parts in the prior art, and to provide a straightening roller suitable for harsh environment and high dust. The utility model is suitable for working conditions with harsh environment and extremely high dust on the plate and strip on site, greatly improving the life of the straightening roller, solving the dust accumulation problem, and having fewer spare parts than the existing straightening rollers.

[0004] The technical scheme of the utility model is as follows: two ends of the roller shaft are passed through the inner hole of the straightening roller flange, two ends of the roller sleeve are sleeved on the outside of the middle part of the roller shaft through the bearing assembly, the bearing assembly comprises a bearing and a gland assembly mounted on both ends of the bearing, the gland assembly comprises a gland 1 mounted on the outer end of the bearing and a gland 2 mounted on the inner end of the bearing, the outer ring of the gland 1 is interference fit with the inner ring of the roller sleeve, a skeleton oil seal is mounted in the middle of the inner ring of the gland 1, and the inner ring of the skeleton oil seal is connected with the roller shaft in a dynamic seal; an oil cavity is arranged on the inner side of the skeleton oil seal, an air cavity arranged opposite to the oil cavity is arranged on the outer side of the skeleton oil seal, and an air cavity outlet is arranged on the outer side of the air cavity.

[0005] An outer annular groove is provided at the inner ring of the pressure cap at the outer end of the skeleton oil seal, and an air cavity is formed between the outer annular groove, the outer end of the skeleton oil seal and the roller shaft. The gap L between the inner ring of the pressure cap near the outer end of the air cavity and the roller shaft forms the air cavity outlet. An inner annular groove is provided at the inner ring of the pressure cap at the inner end of the skeleton oil seal, and an oil cavity is formed between the inner annular groove, the inner end of the skeleton oil seal, the end of the bearing and the roller shaft. An air channel and an oil channel are provided at the end of the roller shaft. The high-pressure air pipe is connected to the air cavity via the air channel, and the oil channel outlet is connected to the oil cavity.

[0006] The outer annular groove is a small annular groove, and the inner annular groove is a large annular groove.

[0007] The gap L is 1-2 mm.

[0008] The inner ring of the gland is a multi-step stepped structure, including a first step, a second step, a third step, a fourth step, and a fifth step connected in sequence. The gap between the first step and the roller shaft forms the air cavity outlet. A radially protruding flange in the middle of the gland forms the third step. The outer annular groove between the third step and the first step forms the second step. The skeleton oil package is sealed close to the fourth step of the flange, and the inner annular groove forms the fifth step.

[0009] The airway outlet is connected to the connection between the second step and the third step.

[0010] The straightening roller flange is installed on the frame, and an outer end of the pressure cover is positioned through a retaining ring.

[0011] An oil cup is arranged at the oil channel inlet.

[0012] The roller shaft is provided with a mounting hole communicated with the airway, and the high-pressure air pipe is installed at the mounting hole.

[0013] In view of the current problem of dust accumulation at the end of the straightening roller, the utility model solves the problem that the straightening roller bearing and sealing positions are often prone to dust accumulation, resulting in the straightening roller burning and short life by adding a high-pressure air pipe, effectively preventing dust and other debris from entering the straightening roller, and prolonging the service life of the straightening roller. Compared with the previous straightening roller, the storage of spare parts can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the straightening roller of the utility model;

[0015] Figure 2 It is a partially enlarged schematic diagram of the utility model;

[0016] Figure 3 is a schematic diagram of air flow;

[0017] In the figure: 1. straightening roller flange; 2. frame; 3. oil cup; 4. high-pressure air pipe; 5. retaining ring; 6. gland one; 7. bearing; 8. gland two; 9. roller sleeve; 10. roller shaft; 11. skeleton seal; 12. O-ring. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0019] When the straightening roller is working, the roller shaft 10 does not rotate, while the gland 6 runs at high speed. Long-term friction will cause a gap between the inner ring of the gland 6 and the roller shaft 10, and dust will enter the internal bearing 7 along the gap of the gland 6. When the on-site environment is very poor and the dust is heavy, dust will accumulate at the installation position of the straightening roller and the gland 6. After a period of use, the straightening roller bearing position and the sealing position will accumulate more dust. Once the bearing does not rotate and causes overheating and burning, it will cause a series of joint reactions between the roller sleeve 9 and the roller shaft 10. In response to this problem, the utility model adopts the following solution:

[0020] Figure 1 , 2 In the figure, the straightening roller flange 1 is installed on the frame 2, the roller shaft 10 is inserted into the inner hole of the straightening roller flange 1, the oil cup 3 is installed at both ends of the roller shaft 10, one end of the oil channel 104 is located at the end face of the roller shaft 10, and the other end is located next to the internal bearing position. When filling oil, the worker uses a grease gun on site to fill oil into the oil cup 3, and the oil flows into the empty space of the internal bearing along the oil channel, and then the oil enters the bearing to lubricate the bearing to prevent the bearing 7 from overheating after a long period of rotation. The high-pressure air pipe 4 is installed on the installation hole 102 reserved on the roller shaft 10. The high-pressure air pipe is reserved on site. After the straightening roller is installed on the equipment, the high-pressure air pipe 4 is threadedly connected and fixed to the installation hole 102 on the straightening roller. One end of the airway 101 is the airway outlet 103, which is connected to the air cavity. The other end of the airway 101 is located on the end face of the roller shaft 10 and is blocked by a plug and is not used. The retaining ring 5, the gland 16, the bearing 7, and the gland 28 are installed on the roller shaft 10 in sequence. The roller sleeve 9 is installed on the outer ring of the gland 16, the bearing 7, and the gland 28. The skeleton oil seal 11 is installed on the sunken surface of the gland 16. The skeleton oil seal 11 has an oil cavity inside, and the skeleton oil seal 11 has an air cavity arranged opposite to the oil cavity outside. The oil channel outlet 105 is connected to the oil cavity.

[0021] During normal operation:

[0022] First, the high-pressure air pipe 4 needs to be connected and tightened with the mounting hole 102 on the roller shaft 10;

[0023] Then the high-pressure gas is pushed to the gap between the gland 6, i.e., the outlet of the air cavity, through the high-pressure gas pipe 4 and the air passage 101 on the roller shaft 10. Because there is a skeleton oil seal 11 near the bearing 7, it can block the gas from entering the inside of the straightening roller. After the inside of the skeleton oil seal 11 is filled with oil through the oil cup 3 on the end face of the roller shaft 10, the grease in the oil cavity squeezes the skeleton oil seal 11 from the inside to generate an outward thrust, so that the gas in the air cavity is squeezed and ventilated outward through the gap L=1mm. Figure 3The arrow indicates the flow direction of the gas. Because there is a skeleton oil seal 11 blocking the right side, a 1mm gap is reserved between the inner ring of the gland 6 and the roller 10, so that the gas will flow outward along the gap, so that the end of the gland 6 will not be covered with dust, and dust cannot enter, thus avoiding the internal dust from causing the bearing 7 to get stuck.

[0024] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A straightening roller suitable for harsh and dusty environments, characterized by: The two ends of the roller shaft (10) are inserted into the inner hole of the straightening roller flange (1), and the two ends of the roller sleeve (9) are sleeved on the outside of the middle part of the roller shaft (10) through the bearing assembly. The bearing assembly includes a bearing (7) and a gland assembly installed at the two ends of the bearing (7). The gland assembly includes a gland 1 (6) installed at the outer end of the bearing (7) and a gland 2 (8) installed at the inner end of the bearing (7). The outer ring of the gland 1 (6) is interference fit with the inner ring of the roller sleeve (9). A skeleton oil seal (11) is installed in the middle of the inner ring of the gland 1 (6). The inner ring of the skeleton oil seal (11) is dynamically sealed with the roller shaft (10); an oil cavity is provided on the inner side of the skeleton oil seal (11), and an air cavity is provided on the outer side of the skeleton oil seal (11) and is arranged opposite to the oil cavity. An air cavity outlet is provided on the outer side of the air cavity.

2. The straightening roller suitable for harsh and dusty environments according to claim 1 is characterized by: An outer annular groove is provided at the inner ring of the pressure cap (6) at the outer end of the skeleton oil seal (11), and an air cavity is formed between the outer annular groove, the outer end of the skeleton oil seal (11) and the roller shaft (10). The gap between the inner ring of the pressure cap (6) near the outer end of the air cavity and the roller shaft (10) forms the air cavity outlet. An inner annular groove is provided at the inner ring of the pressure cap (6) at the inner end of the skeleton oil seal (11), and an oil cavity is formed between the inner annular groove, the inner end of the skeleton oil seal (11), the end of the bearing (7) and the roller shaft (10). An air passage (101) and an oil passage (104) are provided at the end of the roller shaft (10). The high-pressure air pipe (4) is connected to the air cavity via the air passage (101), and the oil passage outlet (105) is connected to the oil cavity.

3. The straightening roller suitable for harsh and dusty environments according to claim 2 is characterized in that: The outer annular groove is a small annular groove, and the inner annular groove is a large annular groove.

4. The straightening roller suitable for harsh and dusty environments according to claim 2 is characterized in that: The gap is 1-2 mm.

5. The straightening roller suitable for harsh and dusty environments according to claim 2 is characterized in that: The inner ring of the gland one (6) is a multi-step stepped structure, including a first step, a second step, a third step, a fourth step, and a fifth step connected in sequence. The gap between the first step and the roller shaft (10) forms the air cavity outlet. A radially protruding flange (61) in the middle of the gland one (6) forms the third step. The outer annular groove between the third step and the first step forms the second step. The skeleton oil seal (11) is installed at the fourth step close to the flange (61), and the inner annular groove forms the fifth step.

6. The straightening roller suitable for harsh and dusty environments according to claim 5 is characterized in that: The airway outlet (103) is connected to the connection between the second step and the third step.

7. The straightening roller suitable for harsh and dusty environments according to claim 1 is characterized in that: The straightening roller flange (1) is mounted on the frame (2), and the outer end of the gland (6) is positioned via a retaining ring (5).

8. The straightening roller suitable for harsh and dusty environments according to claim 2 is characterized in that: An oil cup (3) is provided at the oil channel inlet.

9. The straightening roller suitable for harsh and dusty environments according to claim 2 is characterized in that: The roller shaft (10) is provided with a mounting hole (102) which is in communication with the air passage (101), and the high-pressure air pipe (4) is mounted at the mounting hole (102).

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