Novel high-temperature-resistant roller structure

Abstract

The utility model discloses a novel high-temperature-resistant roller structure in the technical field of belt conveyor components. The novel high-temperature-resistant roller structure comprises a roller body, a fixed shaft and shaft supporting seats, wherein the fixed shaft penetrates through the roller body along a middle shaft and is rotationally mounted with the roller body; the shaft supporting seats are arranged at the two ends of the fixed shaft; the roller body comprises a cylinder side face and end faces closed at the two ends of the cylinder side face. A hole is formed in the end face of one end, and a two-way breather valve is embedded in the hole; sealing bearing cavities are arranged in the centers of the end faces of the two ends respectively, bearings are arranged in the sealing bearing cavities, the fixing shaft penetrates through the sealing bearing cavities and is rotatably installed with the bearings, and the outer wall of the fixing shaft is in tight contact with the sealing bearing cavities.

Description

Technical Field

[0001] The utility model relates to a novel high-temperature resistant roller structure, belonging to the technical field of belt conveyor components. Background Art

[0002] The roller is an important component of the belt conveyor, with a wide variety and a large quantity, and can support the weight of the conveyor belt and the material. The roller described in the utility model is the driven roller of the belt conveyor.

[0003] Due to the harsh environment, large dust, high temperature, water vapor, high humidity, high acidity or alkalinity in the water vapor, and heavy weight of the conveyed material, the high-temperature resistant roller is extremely easy to be damaged. The inventor's creation is to change the structure of the high-temperature resistant roller to extend its service life.

[0004] The existing method for high-temperature resistant rollers is to add end caps to both ends of the roller for sealing, and add seals between the end caps and the shaft. Due to the large temperature difference during the operation of the high-temperature resistant roller, the air sealed in the roller cavity expands and contracts due to the temperature difference of the roller during the operation and non-operation of the roller. When the expansion and contraction of the gas in the roller cavity reach a certain value greater than 0.3 MPa, it is possible to cause the end cap seal to fail, and at the same time, inhale external dust and water vapor into the roller cavity. After long-term operation, the dust and water vapor in the roller cavity enter the bearing, causing the bearing to wear. After the bearing wears, the alignment of the central shaft is offset, further aggravating the seal failure, causing more dust and water vapor to enter the roller cavity. When it reaches a certain level, the seal fails, the bearing is damaged, and the high-temperature resistant roller is scrapped. At present, the structure of the high-temperature resistant roller cannot be used stably and for a long time in a harsh environment, and its service life is short, about one month or so, and it needs to be replaced, belonging to consumables, resulting in the conveyor belt unable to work stably for a long time and increasing the maintenance cost of the enterprise.

[0005] The utility model protects vulnerable parts such as bearings by changing the sealing form of the high-temperature resistant roller and the bearing installation structure, thereby greatly extending the service life of the high-temperature resistant roller. Summary of the Utility Model

[0006] In order to solve the above problems existing in the prior art, the utility model provides a novel high-temperature resistant roller structure.

[0007] The technical solution of the utility model is as follows:

[0008] A novel high-temperature resistant roller structure includes a roller body, a fixed shaft passing through the roller body along the central axis and rotatably installed with the roller body, and shaft support seats arranged at both ends of the fixed shaft;

[0009] The roller body includes a cylindrical side surface and end faces closed at both ends of the cylindrical side surface;

[0010] A two-way breathing valve is installed by opening a hole on one of the end faces and embedding it.

[0011] Sealing bearing cavities are respectively provided at the centers of the two end faces. Bearings are provided in the sealing bearing cavities. The fixed shaft penetrates through the sealing bearing cavities and is rotatably installed with the bearings. The outer wall of the fixed shaft is in close contact with the sealing bearing cavities.

[0012] As a preferred solution, the two-way breathing valve is a rubber valve, including a hollow sleeve. Limiting end edges are provided at the outer edges of both ends of the hollow sleeve. A diaphragm is provided in the middle of the hollow sleeve. A cross slit is provided on the diaphragm.

[0013] As a preferred solution, a cylindrical mounting seat is fixedly provided at the center of the end face. The outer end of the cylindrical mounting seat is open, and the inner end has a wall surface structure with a central opening. An inner oil seal sleeve, an inner gasket ring, a double deep groove ball bearing, an outer oil seal sleeve, an inner positioning end cover, and an outer positioning end cover are sequentially arranged in the inner cavity of the cylindrical mounting seat from the inside to the outside. An inner J-shaped oil seal that fits with the outer wall of the fixed shaft is embedded in the inner cavity of the inner oil seal sleeve. Double outer J-shaped oil seals that fit with the outer wall of the fixed shaft are embedded in the inner cavities of the outer oil seal sleeve and the inner positioning end cover.

[0014] As a preferred solution, the inner and outer ends of the inner ring of the double deep groove ball bearing are respectively abutted against the shaft shoulder and the snap ring of the fixed shaft. The snap ring is fastened on the fixed shaft. The inner and outer ends of the outer ring of the double deep groove ball bearing are respectively abutted against the inner gasket ring and the outer oil seal sleeve.

[0015] As a preferred solution, the inner end of the inner J-shaped oil seal abuts against the inner end wall of the cylindrical mounting seat, and the outer end abuts against the inner hole step of the inner oil seal sleeve; the inner end of the double outer J-shaped oil seal abuts against the inner hole step of the outer oil seal sleeve, and the outer end abuts against the outer positioning end cover through an outer gasket ring.

[0016] As a preferred solution, through holes are coaxially provided on the inner positioning end cover and the outer positioning end cover, and a lubricating nozzle is embedded at the outer end of the through holes.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, the bearing installation cavity and the inner cavity of the drum are sealed and blocked by setting J-shaped oil seals, and the bearings are sealed in the bearing cavities. And a two-way breathing valve is provided in the inner cavity of the drum. When the temperature of the high-temperature drum changes during operation and non-operation, external water vapor and dust will not enter the inner cavity of the drum, and at the same time, water vapor and dust cannot enter the bearing cavities, effectively protecting the service life of the bearings, extending the service life of the high-temperature drum, protecting the bearings from the influence of dust and water vapor by changing the installation structure of the high-temperature drum and the bearings, improving the service life of each component of the high-temperature drum, reducing the maintenance frequency of the conveyor belt, reducing the maintenance cost, and improving the equipment utilization rate.

[0019] 2. The utility model opens holes at the end faces of the drum and is provided with a two-way breathing valve, so that when the temperature of the drum changes, the air pressure in the inner cavity of the drum is kept consistent with the external air pressure, and the seal failure caused by the change of the air pressure in the inner cavity of the drum will not exist. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 is a schematic diagram of the partial structure of the utility model;

[0022] Figure 3 is a schematic diagram of the cross-sectional structure of the two-way breathing valve of the utility model;

[0023] Figure 4 is a schematic diagram of the side structure of the two-way breathing valve of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will combine the drawings and specific embodiments to describe the utility model in detail.

[0025] Refer to Figures 1-4 , a new type of high-temperature resistant drum structure, including a drum body 10, a fixed shaft 20 passing through the drum body 10 along the central axis and rotatably installed with the drum body 10, and shaft support seats 30 arranged at both ends of the fixed shaft 20. The drum body 10 includes a cylindrical side surface 11 and end faces 12 closing both ends of the cylindrical side surface 11.

[0026] Sealing bearing cavities are respectively arranged at the centers of the end faces 12 at both ends of the drum. Bearings are arranged in the sealing bearing cavities. The fixed shaft 20 passes through the sealing bearing cavities and is rotatably installed with the bearings. The outer wall of the fixed shaft 20 is in close contact with the sealing bearing cavities.

[0027] Specifically, a cylindrical mounting seat 52 is fixedly arranged at the center of the end face 12. The outer end of the cylindrical mounting seat 52 is open, and the inner end has a wall surface structure with a central opening. Inside the cavity of the cylindrical mounting seat 52, an inner oil seal sleeve 53, an inner spacer ring 54, a double deep groove ball bearing 55, an outer oil seal sleeve 56, an inner positioning end cover 57, and an outer positioning end cover 58 are arranged in sequence from the inside to the outside. The end of the fixed shaft 20 passes through the inner oil seal sleeve 53, the inner spacer ring 54, the double deep groove ball bearing 55, the outer oil seal sleeve 56, the inner positioning end cover 57, and the outer positioning end cover 58 for installation. An inner J-shaped oil seal 59 that fits against the outer wall of the fixed shaft 20 is embedded in the inner cavity of the inner oil seal sleeve 53, and double outer J-shaped oil seals 510 that fit against the outer wall of the fixed shaft 20 are embedded in the inner cavities of the outer oil seal sleeve 56 and the inner positioning end cover 57; the inner and outer ends of the inner ring of the double deep groove ball bearing 55 are respectively abutted against the shaft shoulder of the fixed shaft 20 and a snap ring 511. The snap ring 511 is clamped on the fixed shaft 20. The inner and outer ends of the outer ring of the double deep groove ball bearing 55 are respectively abutted against the inner spacer ring 54 and the outer oil seal sleeve 56; the inner end of the inner J-shaped oil seal 59 abuts against the inner end wall of the cylindrical mounting seat 52, and the outer end abuts against the inner hole step of the inner oil seal sleeve 53; the inner end of the double outer J-shaped oil seal 510 abuts against the inner hole step of the outer oil seal sleeve 56, and the outer end abuts against the outer positioning end cover 58 through an outer spacer ring 512.

[0028] Through the above structural design, a sealed bearing cavity is formed by the mating of the outer wall of the fixed shaft 20, the inner wall of the cylindrical mounting seat 52, the inner J-shaped oil seal, and the double outer J-shaped oil seals 510. The double deep groove ball bearing 55 is installed therein, which can be isolated from the inside of the cylinder body and the outside world, so that water vapor and dust cannot enter the bearing cavity, effectively protecting the service life of the bearing and extending the service life of the high-temperature drum. By changing the installation structure of the high-temperature drum and the bearing, the bearing is protected from the influence of dust and water vapor, the service life of each component of the high-temperature drum is improved, the maintenance frequency of the conveyor belt is reduced, the maintenance cost is reduced, and the equipment utilization rate is increased.

[0029] Furthermore, through holes are coaxially arranged on the inner positioning end cover 57 and the outer positioning end cover 58, and a lubricating nozzle 51 is embedded and installed at the outer end of the through holes. It can be used to inject grease into the sealed bearing cavity, which not only plays a lubricating role but also further plays a role in sealing and isolating air, and at the same time facilitates the maintenance of the equipment.

[0030] In addition, a two-way breathing valve 40 is installed by opening a hole and embedding it on one end face 12 of the drum; specifically, it includes a hollow sleeve 41, the outer edges of both ends of the hollow sleeve 41 are provided with limiting end edges 42, a diaphragm 43 is arranged in the middle of the hollow sleeve 41, and a cross slit 44 is opened on the diaphragm 43. The two-way breathing valve 40 is a rubber valve, which is made of rubber material as a whole, has certain plasticity and elasticity, is convenient for quick and convenient disassembly and assembly by means of extrusion and pulling, and also enables the cross slit 44 on the diaphragm 43 to open and close with the change of the internal pressure in the drum. For example, when the ambient temperature changes and causes the air pressure in the drum to rise, the diaphragm 43 is squeezed, the cross slit 44 opens, and the internal air is discharged. After the air pressure drops, the cross slit 44 also closes accordingly. Similarly, when the internal pressure is too low, external air can also be supplemented in the same way to achieve automatic air pressure balance. In addition, outside the function of air pressure balance, the cross slit 44 is normally closed under normal pressure, which can reduce the entry of dust and moisture into the drum.

[0031] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A new type of high temperature resistant roller structure, characterized by: It comprises a roller body (10), a fixed shaft (20) passing through the roller body (10) along the central axis and rotatably mounted with the roller body (10), and shaft support seats (30) arranged at both ends of the fixed shaft (20); The drum body (10) comprises a cylindrical side surface (11) and end surfaces (12) closed at both ends of the cylindrical side surface (11); A hole is opened on the end surface (12) at one end and a two-way breathing valve (40) is embedded and installed; The centers of the end surfaces (12) at both ends are respectively provided with sealed bearing cavities, bearings are provided in the sealed bearing cavities, the fixed shaft (20) passes through the sealed bearing cavities and is rotatably mounted with the bearings, and the outer wall of the fixed shaft (20) is in close contact with the sealed bearing cavities.

2. A novel high temperature resistant drum structure as claimed in claim 1, characterized in that: The two-way breathing valve (40) is a rubber valve, comprising a hollow sleeve (41), the outer edges of both ends of the hollow sleeve (41) are provided with limit end edges (42), the middle of the hollow sleeve (41) is provided with a diaphragm (43), and the diaphragm (43) is provided with a cross seam (44).

3. A novel high temperature resistant drum structure as claimed in claim 1, characterized in that: A cylindrical mounting seat (52) is fixedly arranged at the center of the end surface (12); the outer end of the cylindrical mounting seat (52) is open, and the inner end has a wall structure with a central opening; the inner cavity of the cylindrical mounting seat (52) is provided with an inner oil seal sleeve (53), an inner gasket (54), a double deep groove ball bearing (55), an outer oil seal sleeve (56), an inner positioning end cover (57), and an outer positioning end cover (58) in sequence from the inside to the outside; the inner cavity of the inner oil seal sleeve (53) is embedded with an inner J-type oil seal (59) that fits the outer wall of the fixed shaft (20); the inner cavities of the outer oil seal sleeve (56) and the inner positioning end cover (57) are embedded with double outer J-type oil seals (510) that fit the outer wall of the fixed shaft (20).

4. A novel high temperature resistant roller structure as claimed in claim 3, characterized in that: The inner and outer ends of the inner ring of the double deep groove ball bearing (55) are respectively in contact with the shoulder of the fixed shaft (20) and the retaining spring (511), and the retaining spring (511) is clamped on the fixed shaft (20). The inner and outer ends of the outer ring of the double deep groove ball bearing (55) are respectively in contact with the inner gasket (54) and the outer oil seal sleeve (56).

5. A novel high temperature resistant drum structure as claimed in claim 3, characterized in that: The inner end of the inner J-shaped oil seal (59) abuts against the inner end wall of the cylindrical mounting seat (52), and the outer end abuts against the inner hole step of the inner oil seal sleeve (53); the inner end of the double outer J-shaped oil seal (510) abuts against the inner hole step of the outer oil seal sleeve (56), and the outer end abuts against the outer positioning end cover (58) through the outer gasket (512).

6. A novel high temperature resistant roller structure as claimed in claim 3, characterized in that: The inner positioning end cover (57) and the outer positioning end cover (58) are coaxially provided with through holes, and lubrication nozzles (51) are embedded and installed at the outer ends of the through holes.

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