Sealing device for rotary kiln pinion

Abstract

The utility model relates to a sealing device for a rotary kiln pinion, and belongs to the technical field of rotary kiln gear pair sealing. Comprising a sealing mechanism arranged between the fixed end of a gear shaft and a mounting opening in the side wall of one side of a shell and a sealing mechanism arranged between the free end of the gear shaft and a mounting opening in the side wall of the other side of the shell. The sealing mechanism located on one side of the fixed end of the gear shaft comprises a rotary oil slinger, a first fixed oil slinger, a rubber oil slinger, a reverse steel wire oil slinger, a labyrinth seal, a wool felt, a pressing plate and an oil return mechanism. The sealing mechanism located on one side of the free end of the gear shaft comprises a rotary oil slinger, a second fixed oil slinger, a wool felt and a pressing plate. The problem that an existing sealing device at the rotary kiln pinion fixing end is prone to oil leakage is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary kiln gear pair sealing, and in particular relates to a sealing device for a rotary kiln pinion. Background Art

[0002] The large and small gear pairs of the rotary kiln are driven by an open gear device as the edge transmission of the rotary kiln. During operation, the leakage of open gear oil from the gear cover of the open gear is quite serious. In particular, the viscosity of the open gear oil is very high at room temperature and it is difficult to clean, which pollutes both the equipment and the surrounding environment of the equipment. In addition, the rotary kiln is designed according to a 4% slope, and the installation of the rotary kiln pinion is the same. In this way, the open gear oil splashed on the gear shaft of the rotary kiln pinion will form a spiral trajectory and flow out, especially the fixed end of the rotary kiln pinion (i.e. the lower end), which is prone to oil leakage.

[0003] Therefore, it is necessary to provide a new pinion sealing device for a rotary kiln to solve the above technical problems. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and provides a sealing device for a rotary kiln pinion, thereby solving the problem that the sealing device at the fixed end of the rotary kiln pinion is prone to oil leakage.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0006] A sealing device for a rotary kiln pinion comprises a sealing mechanism arranged between a fixed end of a gear shaft and a mounting opening on one side wall of a housing, and a sealing mechanism arranged between a free end of the gear shaft and a mounting opening on the other side wall of the housing.

[0007] The sealing mechanism located at one side of the fixed end of the gear shaft includes a rotary oil slinging ring, a first fixed oil slinging ring, a rubber oil slinging ring, a reverse wire oil slinging ring, a labyrinth seal, a wool felt, a pressure plate, and an oil return mechanism. The rotary oil slinging ring is fixedly arranged on the end face of the rotary kiln pinion near the fixed end of the gear shaft. The first fixed oil slinging ring is rotatably plugged into the inner side of the rotary oil slinging ring away from the rotary kiln pinion. An oil return mechanism is arranged below the first fixed oil slinging ring. A labyrinth seal is arranged on the oil return mechanism and the side of the first fixed oil slinging ring away from the rotary kiln pinion. The first fixed oil slinging ring and the oil return mechanism are both fixedly arranged on the inner side of the mounting opening of the shell side wall, and the labyrinth seal is fixedly arranged on the outer side of the mounting opening of the shell side wall. The rubber oil slinging ring and the reverse wire oil slinging ring are fixedly sleeved on the outer side of the fixed end of the gear shaft in sequence along the direction away from the rotary kiln pinion.

[0008] The sealing mechanism located at one side of the free end of the gear shaft includes a rotating oil slinger, a second fixed oil slinger, wool felt, and a pressure plate. The rotating oil slinger is fixedly arranged on the end face of the rotary kiln pinion near the free end of the gear shaft, and the second fixed oil slinger is rotatably inserted inside the side of the rotating oil slinger away from the rotary kiln pinion.

[0009] Furthermore, for the sealing mechanism on the fixed end side of the gear shaft and the sealing mechanism on the free end side of the gear shaft, the rotary oil flinger ring includes a first ring, a first cylinder, and a second ring. The first ring is fixed on the end face of the rotary kiln pinion by screws, one end of the first cylinder is fixedly connected to the inner end of the first ring, and the other end of the first cylinder is fixedly connected to the middle part of one end face of the second cylinder.

[0010] Further, for the sealing mechanism on the fixed end side of the gear shaft, the first fixed oil-slinging ring includes a first semicircular ring and a first semi-cylinder, the first semi-cylinder and the first semicircular ring are located above the gear shaft and coincide with the axis of the gear shaft, the first semi-cylinder is rotatably inserted into the second circular ring, the first semicircular ring is located on the side of the second circular ring close to the rotary kiln pinion, the inner end of the first semicircular ring is fixedly connected to the end of the first semi-cylinder close to the rotary kiln pinion, and the middle part of the outer side surface of the first semi-cylinder is in sliding contact with the inner end of the second circular ring;

[0011] A first fixed circular ring is fixedly arranged on the mounting opening of the side wall of the shell near the fixed end of the gear shaft, and the first fixed circular ring is fixedly connected to the side wall of the shell through a circle of circular array screws; one end of the first semi-cylinder away from the rotary kiln pinion is fixedly connected to the inner end of the first fixed circular ring.

[0012] Furthermore, for the sealing mechanism on the fixed end side of the gear shaft, the oil return mechanism includes a second semi-cylinder and a first semi-conical cylinder. The second semi-cylinder and the first semi-conical cylinder are located below the gear shaft and coincide with the axis of the gear shaft. The inner diameter of the first semi-conical cylinder close to the rotary kiln pinion is smaller than the outer diameter of the end away from the rotary kiln pinion; the second semi-cylinder is rotatably inserted into the second ring, and the middle part of the outer side surface of the second semi-cylinder is in sliding contact with the inner end of the second ring. The end of the first semi-conical cylinder close to the rotary kiln pinion is fixedly connected to the end of the second semi-conical cylinder away from the rotary kiln pinion, and the end of the first semi-conical cylinder away from the rotary kiln pinion is fixedly connected to the inner end of the first fixed ring; the first semi-cylinder is connected to the second semi-cylinder and the first semi-conical cylinder to form a complete cylindrical structure with two open ends.

[0013] Furthermore, for the sealing mechanism on the fixed end side of the gear shaft, the labyrinth seal is located on the side of the first fixed ring away from the rotary kiln pinion, including a second cylinder, a third ring and a plurality of labyrinth rings; one end of the second cylinder is fixedly connected to the inner end of the first fixed ring, and the other end of the second cylinder is fixedly connected to the outer end of the third ring; a plurality of labyrinth rings are fixedly arranged on the inner side surface of the second cylinder, and the plurality of labyrinth rings are arranged along the axial direction of the gear shaft, the outer end of the labyrinth ring is fixedly connected to the inner side surface of the second cylinder, and the inner end of the labyrinth ring maintains a distance from the outer side surface of the gear shaft; a reflux groove is arranged at the lowest end of all the labyrinth rings, and all the reflux grooves and the inner side surface of the second cylinder form a reflux channel.

[0014] Furthermore, for the sealing mechanism on the fixed end side of the gear shaft, an annular clamping groove is provided at the inner edge of the end face of the third ring away from the rotary kiln pinion, and an annular wool felt is clamped inside the clamping groove, and the inner side of the wool felt is in close contact with the outer side of the gear shaft; a pressure plate is provided on the end face of the third ring away from the rotary kiln pinion, and the pressure plate is an annular structure, which is sleeved on the outer side of the gear shaft and coincides with the axis of the gear shaft, and the pressure plate is fixedly connected to the third ring by a circle of circular array bolts and nuts; the inner end of the pressure plate is in close contact with the wool felt, and the wool felt is fixed to the inside of the clamping groove on the third ring by the pressure plate.

[0015] Furthermore, for the sealing mechanism on the fixed end side of the gear shaft, the rubber oil slinger ring is a split annular structure, a splicing interface is provided on the rubber oil slinger ring, the inner side surface of the rubber oil slinger ring is in close contact with the outer side surface of the gear shaft; an annular groove is provided in the middle of the outer cylindrical surface of the rubber oil slinger ring, a spring is sleeved inside the annular groove, and the rubber oil slinger ring is fixed to the outer side of the gear shaft by the spring.

[0016] Furthermore, for the sealing mechanism on the fixed end side of the gear shaft, the reverse steel wire oil flinger ring is a spiral structure formed by winding steel wire, the reverse steel wire oil flinger ring is welded to the outside of the gear shaft, the reverse steel wire oil flinger ring is located on the side of the rubber oil flinger ring away from the rotary kiln pinion, and the winding direction of the reverse steel wire oil flinger ring is opposite to the rotation direction of the gear shaft.

[0017] Furthermore, for the sealing mechanism on the free end of the gear shaft, the second fixed oil-slinging ring includes a fourth ring and a third cylinder, the third cylinder is rotatably inserted into the second ring, the fourth ring is located on the side of the third cylinder close to the rotary kiln pinion, the inner end of the fourth ring is fixedly connected to the end of the third cylinder close to the rotary kiln pinion, and the middle of the outer side surface of the third cylinder is in sliding contact with the inner end of the second ring; the second fixed ring, the first fixed cylinder, and the third fixed ring are fixedly arranged on the mounting opening of the side wall of the housing close to the free end of the gear shaft; the second fixed ring is connected to the housing through a circle of circular arrays The screw is fixedly connected to the side wall of the shell; one end of the third cylinder away from the rotary kiln pinion is fixedly connected to the middle of the end face of the second fixed ring close to the rotary kiln pinion; the first fixed cylinder is located on the side of the second fixed ring away from the rotary kiln pinion, and one end of the first fixed cylinder close to the rotary kiln pinion is fixedly connected to the middle of the end face of the second fixed ring away from the rotary kiln pinion; the third fixed ring is located on the side of the first fixed cylinder away from the rotary kiln pinion, and the middle of the end face of the third fixed ring close to the rotary kiln pinion is fixedly connected to the side of the first fixed cylinder away from the rotary kiln pinion.

[0018] Furthermore, for the sealing mechanism on the free end side of the gear shaft, an annular clamping groove is provided at the inner edge of the end face of the side of the third fixed ring away from the rotary kiln pinion, and an annular wool felt is clamped inside the clamping groove, and the inner side surface of the wool felt is in close contact with the outer side surface of the gear shaft on the free end side; a pressure plate is provided on the end face of the side of the third fixed ring away from the rotary kiln pinion, and the pressure plate is an annular structure, and the pressure plate is fixedly connected to the third fixed ring by a circle of circular array bolts and nuts; the inner end of the pressure plate is in close contact with the wool felt, and the wool felt is fixed to the inside of the clamping groove on the third fixed ring by the pressure plate.

[0019] The beneficial effects of the utility model compared with the prior art are:

[0020] The utility model provides a sealing device for a rotary kiln pinion, which forms a closed sealing whole through three rotary seals and three fixed seals, especially the dynamic seal and the static seal complement each other, and the gear oil splashed by the kiln pinion movement is blocked in the pinion oil pool to the maximum extent. Among them, only the wool felt is a wearing part, which is easy to replace, so that the maintenance is safer and faster, and the process is simplified, thereby achieving the purpose of facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings:

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

[0023] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0024] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0025] Figure 4 yes Figure 2 A partial enlarged schematic diagram of point C in the middle;

[0026] Figure 5 yes Figure 1 A partial enlarged schematic diagram of point D in the middle;

[0027] Among them, 1 is a small gear of a rotary kiln, 2 is a gear shaft, 3 is a housing, 4 is a sealing mechanism, 5 is a large gear of a rotary kiln, 6 is an oil pool, 7 is a bearing seat, 8 is a rotary oil slinger ring, 9 is a first fixed oil slinger ring, 10 is a rubber oil slinger ring, 11 is a reverse wire oil slinger ring, 12 is a labyrinth seal, 13 is a wool felt, 14 is a pressure plate, 15 is an oil return mechanism, 16 is a first circular ring, 17 is a second circular ring, 18 is a first cylinder, 19 is a first semi-circular cylinder, 20 is a first semi-circular ring, 21 is a first fixed circular ring, 22 is a second semi-circular cylinder, 23 is a first semi-conical cylinder, 24 is a spring, 25 is a second cylinder, 26 is a third circular ring, 27 is a labyrinth circular ring, 28 is a reflux channel, 29 is a second fixed oil slinger ring, 30 is a fourth circular ring, 31 is a third cylinder, 32 is a second fixed circular ring, 33 is a first fixed cylinder, and 34 is a third fixed circular ring. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0029] like Figure 1 As shown in FIG. 5 , the utility model provides a sealing device for a rotary kiln pinion. The rotary kiln pinion 1 is connected to the outside of the gear shaft 2 through a key sleeve, and the rotary kiln pinion 1 rotates synchronously with the gear shaft 2. The gear shaft 2 is tilted along the left and right directions, and the inclination of the gear shaft 2 is set according to the inclination of the rotary kiln. The two ends of the gear shaft 2 are a free end and a fixed end, respectively. The height of the free end on the left is higher than the height of the fixed end on the right. The fixed end of the gear shaft 2 is connected to the drive motor and the reducer.

[0030] The gear shaft 2 is rotatably inserted into the housing 3. A mounting opening is provided on the left and right side walls of the housing 3. Both ends of the gear shaft 2 pass through the mounting openings on the left and right side walls of the housing 3 and extend to the outside. A sealing mechanism 4 is provided between the two ends of the gear shaft 2 and the mounting openings on the left and right side walls of the housing 3. The sealing mechanism 4 on both sides ensures the sealing of the mounting openings at both ends of the gear shaft 2.

[0031] A rotary kiln large gear 5 is rotatably arranged on the upper side of the housing 3. The rotary kiln large gear 5 is located above the rotary kiln small gear 1, and the rotary kiln large gear 5 is meshed with the rotary kiln small gear 1. An oil pool 6 is fixedly arranged at the lower end of the housing 3. The oil pool 6 is a box structure with an upper end opening. The upper end opening of the oil pool 6 is fixedly connected to the lower end opening of the housing 3. The oil pool 6 is filled with open gear oil, and the lower end of the rotary kiln small gear 1 is immersed in the open gear oil in the oil pool 6. A bearing seat 7 is respectively arranged on the left and right sides of the housing 3. The two ends of the gear shaft 2 extending out of the housing 3 are rotatably connected to the inside of the bearing seats 7 on both sides. The two ends of the gear shaft 2 are supported by the bearing seats 7 on both sides, so that the gear shaft 2 drives the rotary kiln small gear 1 to rotate stably inside the housing 3.

[0032] The sealing mechanism 4 located at the fixed end side of the gear shaft 2 includes a rotary oil slinger 8, a first fixed oil slinger 9, a rubber oil slinger 10, a reverse wire oil slinger 11, a labyrinth seal 12, a wool felt 13, a pressure plate 14, and an oil return mechanism 15.

[0033] The rotary oil-slinging ring 8 is fixedly arranged on the end face of the rotary kiln pinion 1 near the fixed end of the gear shaft 2. The rotary oil-slinging ring 8 includes a first ring 16, a first cylinder 18, and a second ring 17. The first ring 16, the first cylinder 18, and the second ring 17 are all sleeved on the outer side of the gear shaft 2 on the fixed end side and coincide with the axis of the gear shaft 2. The first ring 16 and the second ring 17 are perpendicular to the axis of the gear shaft 2. The first ring 16 is fixedly arranged on the end face of the rotary kiln pinion 1 near the fixed end side by screws. One end of the first cylinder 18 is fixedly connected to the inner end of the first ring 16, and the other end of the first cylinder 18 is fixedly connected to the middle of one end face of the second cylinder 25. The rotary oil-slinging ring 8 rotates synchronously with the rotary kiln pinion 1.

[0034] The first fixed oil-slinging ring 9 includes a first semi-circular ring 20 and a first semi-cylinder 19. The first semi-cylinder 19 and the first semi-circular ring 20 are located above the gear shaft 2 on one side of the fixed end and coincide with the axis of the gear shaft 2. The first semi-cylinder 19 is rotatably inserted into the second circular ring 17. The first semi-circular ring 20 is located on the side of the second circular ring 17 close to the rotary kiln pinion 1. The inner end of the first semi-circular ring 20 is fixedly connected to the end of the first semi-cylinder 19 close to the rotary kiln pinion 1, and the middle part of the outer side surface of the first semi-cylinder 19 is in sliding contact with the inner end of the second circular ring 17.

[0035] A first fixed circular ring 21 is fixedly arranged on the mounting opening of the side wall of the housing 3 near the fixed end of the gear shaft 2. The first fixed circular ring 21 is sleeved on the outer side of the gear shaft 2 on the fixed end side and coincides with the axis of the gear shaft 2. The first fixed circular ring 21 is fixedly connected to the side wall of the housing 3 by a circle of screws in a circular array. The end of the first semi-cylinder 19 away from the rotary kiln pinion 1 is fixedly connected to the inner end of the first fixed circular ring 21.

[0036] The oil return mechanism 15 includes a second semi-cylinder 22 and a first semi-conical cylinder 23. The second semi-cylinder 22 and the first semi-conical cylinder 23 are located below the gear shaft 2 and coincide with the axis of the gear shaft 2. The inner diameter of the end of the first semi-conical cylinder 23 close to the rotary kiln pinion 1 is smaller than the outer diameter of the end away from the rotary kiln pinion 1. The second semi-cylinder 22 is rotatably inserted into the second ring 17. The middle part of the outer side surface of the second semi-cylinder 22 is in sliding contact with the inner end of the second ring 17. The end of the first semi-conical cylinder 23 close to the rotary kiln pinion 1 is fixedly connected to the end of the second semi-cylinder 22 away from the rotary kiln pinion 1, and the end of the first semi-conical cylinder 23 away from the rotary kiln pinion 1 is fixedly connected to the inner end of the first fixed ring 21.

[0037] The first semi-cylinder 19, the second semi-cylinder 22 and the first semi-conical cylinder 23 are connected to each other to form a complete cylindrical structure with both ends open.

[0038] The rubber oil slinger 10 is a split annular structure, that is, there is a joint on the rubber oil slinger 10, the rubber oil slinger 10 is fixedly sleeved on the outside of the gear shaft 2, the rubber oil slinger 10 is located on the inside of the first semi-cylinder 19, and the inner side of the rubber oil slinger 10 is in close contact with the outer side of the gear shaft 2. A circular annular groove is provided in the middle of the outer cylindrical surface of the rubber oil slinger 10, and a spring 24 is sleeved inside the circular annular groove, and the rubber oil slinger 10 is fixed to the outside of the gear shaft 2 by the spring 24.

[0039] The reverse steel wire oil slinger 11 is a spiral structure formed by winding steel wire. The reverse steel wire oil slinger 11 is welded to the outside of the gear shaft 2. The reverse steel wire oil slinger 11 is located on the side of the rubber oil slinger 10 away from the rotary kiln pinion 1. The winding direction of the reverse steel wire oil slinger 11 is opposite to the rotation direction of the gear shaft 2.

[0040] The labyrinth seal 12 is located on the side of the first fixed ring 21 away from the rotary kiln pinion 1, and includes a second cylinder 25, a third ring 26 and a plurality of labyrinth rings 27. The second cylinder 25, the third ring 26 and the plurality of labyrinth rings 27 are all sleeved on the outer side of the gear shaft 2 and coincide with the axis of the gear shaft 2. One end of the second cylinder 25 is fixedly connected to the inner end of the first fixed ring 21, and the other end of the second cylinder 25 is fixedly connected to the outer end of the third ring 26. A plurality of labyrinth rings 27 are fixedly arranged on the inner side surface of the second cylinder 25, and the plurality of labyrinth rings 27 are arranged along the axis of the gear shaft 2, and the outer end of the labyrinth ring 27 is fixedly connected to the inner side surface of the second cylinder 25, and the inner end of the labyrinth ring 27 is spaced from the outer side surface of the gear shaft 2. A reflux groove is disposed at the bottom end of all the labyrinth rings 27 , and all the reflux grooves and the inner side surface of the second cylinder 25 form a reflux channel 28 .

[0041] A circular clamping groove is provided at the inner edge of the end face of the third ring 26 away from the rotary kiln pinion 1, and a circular wool felt 13 is clamped inside the clamping groove, and the inner side of the wool felt 13 is in close contact with the outer side of the gear shaft 2 on the fixed end side. A pressing plate 14 is provided on the end face of the third ring 26 away from the rotary kiln pinion 1. The pressing plate 14 is a circular ring structure, and the pressing plate 14 is sleeved on the outer side of the gear shaft 2 on the free end side and coincides with the axis of the gear shaft 2. The pressing plate 14 is fixedly connected to the third ring 26 through a circle of circular array bolts and nuts. The inner end of the pressing plate 14 is in close contact with the wool felt 13, and the wool felt 13 is fixed to the inside of the clamping groove on the third ring 26 through the pressing plate 14.

[0042] The sealing mechanism 4 located at one side of the free end of the gear shaft 2 includes a rotary oil slinger 8 , a second fixed oil slinger 29 , a wool felt 13 , and a pressure plate 14 .

[0043] The rotary oil-slinging ring 8 is fixedly arranged on the end face of the rotary kiln pinion 1 near the free end of the gear shaft 2. The rotary oil-slinging ring 8 includes a first ring 16, a first cylinder 18, and a second ring 17. The first ring 16, the first cylinder 18, and the second ring 17 are all sleeved on the outer side of the gear shaft 2 on the free end side and coincide with the axis of the gear shaft 2. The first ring 16 and the second ring 17 are perpendicular to the axis of the gear shaft 2. The first ring 16 is fixedly arranged on the end face of the rotary kiln pinion 1 by screws, one end of the first cylinder 18 is fixedly connected to the inner end of the first ring 16, and the other end of the first cylinder 18 is fixedly connected to the middle part of the end face of one side of the second cylinder 25. The rotary oil-slinging ring 8 rotates synchronously with the rotary kiln pinion 1.

[0044] The second fixed oil slinger ring 29 includes a fourth ring 30 and a third cylinder 31. The fourth ring 30 and the third cylinder 31 are both sleeved on the outer side of the gear shaft on one side of the free end and coincide with the axis of the gear shaft. The third cylinder 31 is rotatably inserted into the second ring 17. The fourth ring 30 is located on the side of the third cylinder 31 close to the rotary kiln pinion 1. The inner end of the fourth ring 30 is fixedly connected to the end of the third cylinder 31 close to the rotary kiln pinion 1, and the middle part of the outer side surface of the third cylinder 31 is in sliding contact with the inner end of the second ring 17.

[0045] A second fixed circular ring 32, a first fixed circular cylinder 33, and a third fixed circular ring 34 are fixedly arranged on the mounting opening of the side wall of the housing 3 close to the free end of the gear shaft 2. The second fixed circular ring 32, the first fixed circular cylinder 33, and the third fixed circular ring 34 are all sleeved on the outer side of the gear shaft 2 on the free end side and coincide with the axis of the gear shaft 2. The second fixed circular ring 32 is fixedly connected to the side wall of the housing 3 by a circle of screws in a circular array. The end of the third circular cylinder 31 away from the rotary kiln pinion 1 is fixedly connected to the middle of the end face of the second fixed circular ring 32 close to the rotary kiln pinion 1. The first fixed circular cylinder 33 is located on the side of the second fixed circular ring 32 away from the rotary kiln pinion, and the end of the first fixed circular cylinder 33 close to the rotary kiln pinion is fixedly connected to the middle of the end face of the second fixed circular ring 32 away from the rotary kiln pinion. The third fixed ring 34 is located on the side of the first fixed cylinder 33 away from the rotary kiln pinion 1 , and the middle of the end surface of the third fixed ring 34 close to the rotary kiln pinion is fixedly connected to the side of the first fixed cylinder 33 away from the rotary kiln pinion 1 .

[0046] A circular clamping groove is provided at the inner edge of the end face of the third fixed circular ring 34 away from the rotary kiln pinion 1, and a circular wool felt 13 is clamped inside the clamping groove, and the inner side of the wool felt 13 is in close contact with the outer side of the gear shaft 2 on the free end side. A pressing plate 14 is provided on the end face of the third fixed circular ring 34 away from the rotary kiln pinion 1. The pressing plate 14 is a circular ring structure, and the pressing plate 14 is sleeved on the outer side of the gear shaft 2 on the free end side and coincides with the axis of the gear shaft 2. The pressing plate 14 is fixedly connected to the third fixed circular ring 34 through a circle of circular array bolts and nuts. The inner end of the pressing plate 14 is in close contact with the wool felt 13, and the wool felt 13 is fixed to the inside of the clamping groove on the third fixed circular ring 34 through the pressing plate 14.

[0047] The working principle of the utility model is:

[0048] When the rotary kiln pinion 1 and the rotary kiln large gear 5 mesh with each other and rotate, oil pool lubrication is adopted. Oil pool lubrication is a lubrication device. Oil pool lubrication relies on the rotating parts submerged in the oil pool to bring oil to the parts that need lubrication for lubrication, forming a lubricating oil film on the mechanical moving parts, reducing the wear and friction between the mechanical parts, and taking away the heat generated by friction. The rotary kiln pinion 1 brings up the open gear oil inside the oil pool 6, and the rotary kiln pinion 1 meshes with the rotary kiln large gear 5 for transmission, thereby lubricating the rotary kiln large gear 5.

[0049] The rotary oil slinger rings 8 of the sealing mechanisms 4 on both sides rotate synchronously with the rotary kiln pinion 1, and most of the open gear oil splashed by the rotary kiln pinion 1 is blocked by the rotary oil slinger rings 8, thereby changing the splashing direction and splashing intensity of the open gear oil. The rotary oil slinger rings 8 sling this part of the open gear oil into the oil pool 6 with the centrifugal force generated by the operation of the rotary kiln pinion 1.

[0050] For the sealing mechanism 4 on the fixed end side, the remaining small part of the split gear oil splashed by the rotary kiln pinion 1 falls on the first fixed oil slinger ring 9, and this part of the split gear oil falls along the inner side surface of the first fixed oil slinger ring 9 to the inside of the oil return mechanism 15, and finally flows back to the oil pool 6.

[0051] The rubber oil slinger 10 is fixed on the gear shaft 2, and can block most of the open gear oil flowing along the spiral of the gear shaft 2. Since the rubber oil slinger 10 is spliced, it is easy to replace. The rubber oil slinger 10 rotates synchronously with the gear shaft 2, and the centrifugal force generated by the rubber oil slinger 10 throws this part of the open gear oil into the oil return mechanism 15, and finally flows back to the oil pool 6.

[0052] Part of the open gear oil that passes through the rubber oil slinger ring 10 reaches the reverse wire oil slinger ring 11. Since the winding direction of the reverse wire oil slinger ring 11 is opposite to the rotation direction of the gear shaft 2, this part of the open gear oil is thrown into the oil return mechanism 15 under the action of the centrifugal force generated by the rotation of the reverse wire oil slinger ring 11, and finally flows back to the oil pool 6.

[0053] Part of the open gear oil that passes over the reverse wire oil slinger ring 11 enters the interior of the labyrinth seal 12, and is spun into the interior of the labyrinth seal 12 under the centrifugal force of the gear shaft 2. The open gear oil that enters the labyrinth seal 12 gathers at the lower end, and flows back to the oil return mechanism 15 through the reflux channel 28, and finally flows back to the oil pool 6.

[0054] The wool felt 13 of the sealing mechanism 4 on both sides has the function of preventing the gear oil of the kiln large and small gear pairs from leaking out, and the function of preventing dust from entering the interior of the housing 3. When the wool felt 13 needs to be replaced, the wool felt 13 can be replaced after the pressing plate 14 is removed, which is convenient and quick.

[0055] The first semi-conical cylinder 23 of the oil return mechanism 15 is designed with a certain slope so as not to store oil, thereby facilitating the open gear oil to quickly flow into the oil pool 6 .

[0056] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A sealing device for a rotary kiln pinion, characterized in that: It comprises a sealing mechanism (4) arranged between a fixed end of the gear shaft (2) and a mounting opening on a side wall of one side of the housing (3), and a sealing mechanism (4) arranged between a free end of the gear shaft (2) and a mounting opening on a side wall of the other side of the housing (3). The sealing mechanism (4) located on the fixed end side of the gear shaft (2) comprises a rotary oil slinger (8), a first fixed oil slinger (9), a rubber oil slinger (10), a reverse wire oil slinger (11), a labyrinth seal (12), a wool felt (13), a pressure plate (14), and an oil return mechanism (15). The rotary oil slinger (8) is fixedly arranged on the end surface of the rotary kiln pinion (1) close to the fixed end of the gear shaft (2). The first fixed oil slinger (9) is rotatably inserted into the rotary kiln pinion (1) on the side of the rotary oil slinger (8) away from the rotary kiln pinion (1). An oil return mechanism (15) is provided below the rotary kiln pinion (9); a labyrinth seal (12) is provided on the side of the oil return mechanism (15) and the first fixed oil slinger (9) away from the rotary kiln pinion (1); the first fixed oil slinger (9) and the oil return mechanism (15) are both fixedly provided on the inner side of the mounting opening of the side wall of the housing (3); and the labyrinth seal (12) is fixedly provided on the outer side of the mounting opening of the side wall of the housing (3); the rubber oil slinger (10) and the reverse wire oil slinger (11) are fixedly sleeved on the outer side of the fixed end of the gear shaft (2) in sequence along a direction away from the rotary kiln pinion (1); The sealing mechanism (4) located on one side of the free end of the gear shaft (2) comprises a rotary oil slinger (8), a second fixed oil slinger (29), a wool felt (13), and a pressure plate (14); the rotary oil slinger (8) is fixedly arranged on the end surface of the rotary kiln pinion (1) close to the free end of the gear shaft (2); and the second fixed oil slinger (29) is rotatably inserted inside the rotary oil slinger (8) on the side away from the rotary kiln pinion (1).

2. A sealing device for a rotary kiln pinion according to claim 1, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2) and the sealing mechanism (4) on the free end side of the gear shaft (2), the rotary oil slinger (8) comprises a first circular ring (16), a first cylinder (18), and a second circular ring (17); the first circular ring (16) is fixedly arranged on the end surface of the rotary kiln pinion (1) by means of screws; one end of the first cylinder (18) is fixedly connected to an inner end of the first circular ring (16); and the other end of the first cylinder (18) is fixedly connected to the middle portion of an end surface of one side of the second cylinder (25).

3. A sealing device for a rotary kiln pinion according to claim 2, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2), the first fixed oil-slinging ring (9) comprises a first semicircular ring (20) and a first semicircular cylinder (19), the first semicircular cylinder (19) and the first semicircular ring (20) are located above the gear shaft (2) and coincide with the axis of the gear shaft (2), the first semicircular cylinder (19) is rotatably inserted into the inside of the second circular ring (17), the first semicircular ring (20) is located on the side of the second circular ring (17) close to the rotary kiln pinion (1), an inner end of the first semicircular ring (20) is fixedly connected to an end of the first semicircular cylinder (19) close to the rotary kiln pinion (1), and a middle portion of an outer side surface of the first semicircular cylinder (19) is in sliding contact with an inner end of the second circular ring (17); A first fixing ring (21) is fixedly arranged on a mounting opening of a side wall of the housing (3) close to the fixed end of the gear shaft (2); the first fixing ring (21) is fixedly connected to the side wall of the housing (3) via a circle of screws in a circular array; and an end of the first semi-cylinder (19) away from the rotary kiln pinion (1) is fixedly connected to an inner end of the first fixing ring (21).

4. A sealing device for a rotary kiln pinion according to claim 3, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2), the oil return mechanism (15) comprises a second semi-cylinder (22) and a first semi-conical cylinder (23); the second semi-cylinder (22) and the first semi-conical cylinder (23) are located below the gear shaft (2) and coincide with the axis of the gear shaft (2); the inner diameter of the end of the first semi-conical cylinder (23) close to the rotary kiln pinion (1) is smaller than the outer diameter of the end away from the rotary kiln pinion (1); the second semi-cylinder (22) is rotatably inserted into the interior of the second ring (17 ...conical cylinder (23) is rotatably inserted into the interior of the second ring (17); the second semi-conical cylinder (23) is rotatably inserted into the interior of the second ring (17); the second semi-conical cylinder (23) is rotatably inserted into the interior of the second ring (17); the second semi-conical cylinder (23) is rotatably inserted into the interior of the second ring (17); the second semi-conical cylinder (23) is rotatably inserted into the interior of the second ring (17); the The middle part of the outer side surface of the first semi-conical cylinder (22) is in sliding contact with the inner end of the second circular ring (17); the end of the first semi-conical cylinder (23) close to the rotary kiln pinion (1) is fixedly connected to the end of the second semi-conical cylinder (22) away from the rotary kiln pinion (1); the end of the first semi-conical cylinder (23) away from the rotary kiln pinion (1) is fixedly connected to the inner end of the first fixed circular ring (21); the first semi-conical cylinder (19), the second semi-conical cylinder (22) and the first semi-conical cylinder (23) are connected to each other to form a complete cylindrical structure with both ends open.

5. A sealing device for a rotary kiln pinion according to claim 4, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2), the labyrinth seal (12) is located on the side of the first fixed ring (21) away from the rotary kiln pinion (1), and includes a second cylinder (25), a third ring (26) and a plurality of labyrinth rings (27); one end of the second cylinder (25) is fixedly connected to an inner end of the first fixed ring (21), and the other end of the second cylinder (25) is fixedly connected to an outer end of the third ring (26); 5) is fixedly provided with a plurality of labyrinth rings (27), the plurality of labyrinth rings (27) are arranged along the axial direction of the gear shaft (2), the outer end of the labyrinth ring (27) is fixedly connected to the inner side surface of the second cylinder (25), and the inner end of the labyrinth ring (27) is spaced apart from the outer side surface of the gear shaft (2); a reflux groove is provided at the lowest end of all the labyrinth rings (27), and all the reflux grooves and the inner side surface of the second cylinder (25) form a reflux channel (28).

6. A sealing device for a rotary kiln pinion according to claim 5, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2), an annular clamping groove is provided at the inner edge of the end surface of the third ring (26) away from the rotary kiln pinion (1), and an annular wool felt (13) is clamped inside the clamping groove, and the inner side surface of the wool felt (13) is in close contact with the outer side surface of the gear shaft (2); a pressing plate (14) is provided on the end surface of the third ring (26) away from the rotary kiln pinion (1), and the pressing plate (14) is an annular structure. The pressing plate (14) is sleeved on the outer side of the gear shaft (2) and coincides with the axis of the gear shaft (2), and the pressing plate (14) is fixedly connected to the third ring (26) by a circle of circular array bolts and nuts; an inner end of the pressing plate (14) is in close contact with the wool felt (13), and the wool felt (13) is fixed to the inside of the clamping groove on the third ring (26) by the pressing plate (14).

7. A sealing device for a rotary kiln pinion according to claim 1, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2), the rubber oil slinger ring (10) is a split annular structure, a joint interface is provided on the rubber oil slinger ring (10), the inner side surface of the rubber oil slinger ring (10) is in close contact with the outer side surface of the gear shaft (2); a circular annular groove is provided in the middle of the outer cylindrical surface of the rubber oil slinger ring (10), a spring (24) is sleeved inside the circular annular groove, and the rubber oil slinger ring (10) is fixed to the outer side of the gear shaft (2) by the spring (24).

8. The sealing device for a rotary kiln pinion according to claim 1, characterized in that: For the sealing mechanism (4) on the fixed end side of the gear shaft (2), the reverse steel wire oil slinger (11) is a spiral structure formed by winding steel wires. The reverse steel wire oil slinger (11) is welded to the outer side of the gear shaft (2). The reverse steel wire oil slinger (11) is located on the side of the rubber oil slinger (10) away from the rotary kiln pinion (1). The winding direction of the reverse steel wire oil slinger (11) is opposite to the rotation direction of the gear shaft (2).

9. A sealing device for a rotary kiln pinion according to claim 2, characterized in that: For the sealing mechanism (4) on the free end side of the gear shaft (2), the second fixed oil slinger ring (29) comprises a fourth ring (30) and a third cylinder (31), the third cylinder (31) is rotatably inserted into the inside of the second ring (17), the fourth ring (30) is located on the side of the third cylinder (31) close to the rotary kiln pinion (1), the inner end of the fourth ring (30) is fixedly connected to the end of the third cylinder (31) close to the rotary kiln pinion (1), and the middle part of the outer side surface of the third cylinder (31) is in sliding contact with the inner end of the second ring (17); the second fixed ring (32), the first fixed cylinder (33) and the third fixed ring (34) are fixedly arranged on the mounting opening of the side wall of the housing (3) close to the free end of the gear shaft (2); the second fixed ring (32) ) is fixedly connected to the side wall of the housing (3) by a circle of screws in a circular array; one end of the third cylinder (31) away from the rotary kiln pinion (1) is fixedly connected to the middle of the end face of the second fixed ring (32) on the side close to the rotary kiln pinion (1); the first fixed cylinder (33) is located on the side of the second fixed ring (32) away from the rotary kiln pinion, and one end of the first fixed cylinder (33) close to the rotary kiln pinion is fixedly connected to the middle of the end face of the second fixed ring (32) on the side away from the rotary kiln pinion; the third fixed ring (34) is located on the side of the first fixed cylinder (33) away from the rotary kiln pinion (1), and the middle of the end face of the third fixed ring (34) close to the rotary kiln pinion is fixedly connected to the side of the first fixed cylinder (33) away from the rotary kiln pinion (1).

10. A sealing device for a rotary kiln pinion according to claim 9, characterized in that: For the sealing mechanism (4) on the free end side of the gear shaft (2), an annular clamping groove is provided at the inner edge of the end surface of the side of the third fixed ring (34) away from the rotary kiln pinion (1), and an annular wool felt (13) is clamped inside the clamping groove, and the inner side surface of the wool felt (13) is in close contact with the outer side surface of the gear shaft (2) on the free end side; a pressing plate (14) is provided on the end surface of the side of the third fixed ring (34) away from the rotary kiln pinion (1), and the pressing plate (14) is an annular structure. The pressing plate (14) is fixedly connected to the third fixed ring (34) by a circle of circular array bolts and nuts; an inner end of the pressing plate (14) is in close contact with the wool felt (13), and the wool felt (13) is fixed to the inside of the clamping groove on the third fixed ring (34) by the pressing plate (14).

Images