Self-adjusting end face sealing device for rotary kiln
By designing a self-adjusting end-face sealing device in the rotary kiln, the sealing structure and flexible graphite gasket are adjusted by radial and axial adjustment of the sealing structure and flexible graphite gasket, the problem of poor sealing effect caused by cylinder expansion is solved, and stable sealing effect and extended filler life are achieved.
Patent Information
- Application Number
- CN202420235035.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-31
AI Technical Summary
The expansion of the cylinder of the rotary kiln under high temperature environments leads to irregular movement of the sealing surface and irregular gap changes, resulting in poor sealing effect and short service life of the filler, which cannot guarantee zero leakage and long-term operation.
A self-adjusting end-face sealing device is designed, and the sealing effect between the cylinder and the end cover is ensured through a preset number of radial adjustment sealing structures and axial adjustment sealing structures, combined with flexible graphite gasket sealing.
It realizes the stability of maintaining the sealing effect under high temperature conditions, avoids the problems of irregular movement of the sealing surface and irregular gap changes, extends the service life of the filler, and ensures the long-term operation of the equipment.
Smart Images
Figure CN222187745U_ABST
Abstract
Description
Technical field:
[0001] The utility model belongs to the technical field of sealing connection between an end cover and a cylinder of a rotary kiln, and more specifically relates to a self-adjusting end face sealing device for a rotary kiln. Background technology:
[0002] The general rotary kiln is composed of a cylinder, a feed and discharge end cover and other components. The common cylinder is supported by two or more rollers and is placed at an angle of 2 to 5 degrees to the horizontal. The feed and discharge end covers are located at both ends of the cylinder and fixed to the ground or platform. The two ends of the cylinder extend into the two end covers and rotate in them.
[0003] During normal operation, the feed end cover and the barrel move relative to each other, but the space inside the barrel and the end cover is the solid phase and gas phase space of the raw materials. Therefore, a sealing device needs to be installed at this part to isolate it from the outside world.
[0004] Commonly used sealing devices include fish scale seals, packing seals, labyrinth gas seals, and end face seals. In actual applications, especially in high-temperature applications, the cylinder expands in both the axial and radial directions when heated. The radial expansion causes the circumference of the cylinder to become larger and the center of the circle to move upward, while the axial expansion causes the length of the cylinder extending into the end cover to increase. Because the end cover is fixed to the ground, the relative position and gap of the contact part between the cylinder and the cover change greatly under hot conditions, resulting in irregular movement of the sealing surface, irregular changes in the gap, and repeated kneading of the packing by the equipment, resulting in poor sealing effect, short packing service life, and inability to ensure zero leakage and long-term operation of the equipment. Utility model content:
[0005] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a self-adjusting end face sealing device for a rotary kiln;
[0006] The first technical problem to be solved is: under high-temperature application environment, the cylinder of the rotary kiln expands in both axial and radial directions due to heat. The relative position and gap of the contact parts of the cylinder and the cover change greatly under hot conditions, resulting in irregular movement of the sealing surface, irregular change of the gap, and repeated kneading of the packing by the equipment, resulting in poor sealing effect, short service life of the packing, and inability to guarantee zero leakage and long-term operation of the equipment.
[0007] The specific technical solution of the utility model to solve the above technical problems is: the self-adjusting end face sealing device for rotary kiln is arranged between the end cover and the cylinder, the end cover includes a discharge end cover sleeve and a discharge end cover body welded together, the discharge end cover sleeve is plug-fitted with the cylinder, and is characterized in that: the discharge end cover sleeve is matched with the cylinder through a preset number of radial adjustment sealing structures and a preset number of axial adjustment sealing structures;
[0008] The radial adjustment sealing structure comprises a radial cylinder body, a radial roller and a radial roller bracket, wherein the radial cylinder body is fixed to the outer side wall of the discharge end cover sleeve along the radial direction of the cylinder body through a radial cylinder bracket, a slot is provided on the outer side wall of the discharge end cover sleeve, and the radial roller is fixed to the telescopic rod of the radial cylinder body through a radial roller bracket, and the radial roller penetrates the slot and cooperates with the outer side wall of the cylinder body;
[0009] The axial adjustment sealing structure comprises an axial cylinder body, an axial roller, an axial roller bracket, an axial cylinder support, an inner ring and an outer ring connecting piece, an outer ring, and an inner ring;
[0010] The inner ring is sleeved on the outer side wall of the discharge end cover sleeve, an outer ring is arranged outside the inner ring, and the outer ring is fixed to the outer side wall of the cylinder through an L-shaped outer ring connector, and an annular groove is enclosed between the inner ring and the outer ring.
[0011] The axial cylinder body is fixed to the outer wall of the discharge end cover sleeve along the axial direction of the cylinder body through an axial cylinder support, and the axial roller is fixed to the telescopic rod of the axial cylinder body through an axial roller bracket. The telescopic rod of the axial cylinder body is penetrated by an annular groove, and the axial roller cooperates with the side walls of the outer ring and the inner ring.
[0012] Furthermore, a reinforcing angle plate is provided between the inner ring and the cylinder.
[0013] Furthermore, the dynamic ring base is fixed on the outer side wall of the cylinder, and the dynamic ring is embedded in the dynamic ring base and fixed by countersunk bolts.
[0014] Furthermore, the stationary ring base is fixed on the side end surface of the discharge end cover sleeve, and the stationary ring is embedded in the stationary ring base and fixed by countersunk bolts.
[0015] Furthermore, the dynamic ring base and the dynamic ring are sealed with a flexible graphite gasket.
[0016] Furthermore, a flexible graphite gasket is used to seal between the stationary ring base and the stationary ring.
[0017] The beneficial effects of the utility model are:
[0018] One advantage of the utility model is that the discharge end cover sleeve and the cylinder body cooperate with each other through a preset number of radial adjustment sealing structures and a preset number of axial adjustment sealing structures, thereby ensuring that the discharge end cover sleeve and the cylinder body are kept in a state of relative rotation, and good sealing and cooperation are achieved, thereby solving the problem that the cylinder body of the rotary kiln expands in both the axial and radial directions due to heat, resulting in poor sealing effect;
[0019] One advantage of the utility model is that it provides a radially adjustable sealing structure by pre-setting the length of the piston, so that the roller can roll freely in the cylinder of the end cover, and a certain gap is left between the outer wall of the former and the inner wall of the latter, so that there will be no direct friction, which solves the problem that the cylinder of the rotary kiln expands in the axial direction when heated, and the relative position and gap of the contact parts of the cylinder and the cover change greatly under hot conditions, resulting in irregular movement of the sealing surface, irregular change of the gap, and repeated kneading of the filler by the equipment, resulting in poor sealing effect. Description of the drawings:
[0020] Attached Figure 1 It is a schematic diagram of the structure of the utility model;
[0021] Attached Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;
[0022] Attached Figure 3 This is a schematic diagram of the radially adjustable sealing structure of the utility model;
[0023] Attached Figure 4 This is a schematic diagram of the axially adjustable sealing structure of the utility model;
[0024] Attached Figure 5 This is a schematic diagram of the matching structure of the dynamic and static ring base of the utility model; in the accompanying drawings:
[0025] 1. Cylinder body; 11. Reinforced angle plate; 12. Inner ring and outer ring connector; 13. Outer ring; 14. Inner ring; 2. End cover; 21. Discharge end cover sleeve; 22. Discharge end cover body; 3. Radial adjustment sealing structure; 31. Radial roller; 32. Radial cylinder body; 33. Radial roller bracket; 34. Radial roller shaft; 35. Radial cylinder support; 4. Axial adjustment sealing structure; 41. Axial roller; 42. Axial cylinder body; 43. Axial roller bracket; 44. Axial roller shaft; 45. Axial cylinder support; 51. Moving ring base; 52. Moving ring; 53. Static ring base; 54. Static ring. Specific implementation method:
[0026] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0027] Specific implementation of the utility model: the self-adjusting end face sealing device for rotary kiln is arranged between the end cover 2 and the cylinder 1, the end cover 2 includes a discharge end cover sleeve 21 and a discharge end cover body 22 welded together, the discharge end cover sleeve 21 is plugged and matched with the cylinder 1, and is characterized in that: the discharge end cover sleeve 21 is matched with the cylinder 1 through a preset number of radial adjustment sealing structures 3 and a preset number of axial adjustment sealing structures 4;
[0028] The radial adjustment sealing structure 3 includes a radial cylinder body 32, a radial roller 31 and a radial roller bracket 33.
[0029] The axial adjustment sealing structure 4 includes an axial cylinder body 42 , an axial roller 41 , an axial roller bracket 43 , an axial cylinder support 45 , an inner ring and outer ring connecting piece 12 , an outer ring 13 , and an inner ring 14 .
[0030] Furthermore, the radial cylinder body 32 is fixed to the outer wall of the discharge end cover sleeve 21 along the radial direction of the cylinder body 1 through a radial cylinder support 35, and a groove is provided on the outer wall of the discharge end cover sleeve 21. The radial roller 31 is fixed to the telescopic rod of the radial cylinder body 32 through a radial roller bracket 33, and the radial roller 31 is provided with a groove to cooperate with the outer wall of the cylinder body 1.
[0031] Furthermore, the inner ring 14 is sleeved on the outer side wall of the discharge end cover sleeve 21, and the outer ring 13 is arranged outside the inner ring 14. The outer ring 13 is fixed to the outer side wall of the cylinder 1 through an L-shaped inner ring and outer ring connector 12, and an annular groove is enclosed between the inner ring 14 and the outer ring 13.
[0032] The axial cylinder body 42 is fixed to the outer wall of the discharge end cover sleeve 21 along the axial direction of the cylinder body 1 through an axial cylinder support 45, and the axial roller 41 is fixed to the telescopic rod of the axial cylinder body 42 through an axial roller bracket 43. The telescopic rod of the axial cylinder body 42 is provided with an annular groove, and the axial roller 41 cooperates with the side walls of the outer ring 13 and the inner ring 14.
[0033] Furthermore, a reinforcing angle plate 11 is provided between the inner ring 14 and the cylinder 1 .
[0034] Furthermore, the dynamic ring base 51 is fixed on the outer wall of the cylinder 1, and the dynamic ring 52 is embedded in the dynamic ring base 51 and fixed by countersunk bolts.
[0035] Furthermore, the stationary ring base 53 is fixed on the side end surface of the discharge end cover sleeve 21, and the stationary ring 54 is embedded in the stationary ring base 53 and fixed by countersunk bolts.
[0036] Furthermore, the dynamic ring base 51 and the dynamic ring 52 are sealed with a flexible graphite gasket.
[0037] Furthermore, the stationary ring base 53 and the stationary ring 54 are sealed with a flexible graphite gasket.
[0038] It should be noted that the utility model is a self-adjusting end face sealing device for a rotary kiln.
[0039] 1. Working process of stabilizing system:
[0040] First, the discharge end cover sleeve 21 and the discharge end cover body 22 are welded together, and the weight of the two is offset by the constant force bracket under the suspension ear, and they are sleeved around the cylinder 1 with a posture close to zero weight. As shown in the figure: multiple radial adjustment sealing structures 3 and multiple axial adjustment sealing structures 4 are evenly arranged on the circumference.
[0041] There are two positional relationships between the discharge end cover sleeve 21 and the cylinder body 1, namely, axial and radial.
[0042] The axial position relationship between the discharge end cover sleeve 21 and the cylinder body 1 is that the outer ring 13, the inner ring 14 and the end cover 2 are tightly fitted together by the action of the axial cylinder body 42. The pressing force is controlled by the pressure of the axial cylinder body 42. The outer ring 13 and the inner ring 14 are connected and fixed to the outer wall of the cylinder body 1 through the inner ring and outer ring connector 12, so that the two are tightly fitted and the normal rolling of the axial roller 41 is not delayed.
[0043] The radial position relationship between the discharge end cover sleeve 21 and the cylinder body 1 is achieved by pressing the radial cylinder body 32, and the radial roller 31 is provided at the head of the plunger of the radial cylinder body 32, and the radial roller 31 rotates with the rotation of the cylinder body 1. By presetting the length of the plunger, the roller 1 can roll freely in the discharge end cover sleeve 21, and a certain gap is left between the outer wall of the former and the inner wall of the latter, so that there will be no direct friction.
[0044] Among them, this gap is accurately calculated based on the temperature difference and expansion difference between the discharge end cover sleeve 21 and the cylinder 1. The distribution of this gap on the circumference may be uneven, but it is always greater than 0, so as to avoid direct friction.
[0045] A fixed pressure is set on the radial cylinder body 32 to keep each radial cylinder body 32 in working state, ensure that the discharge end cover sleeve 21 is axially parallel to the cylinder body 1, and further ensure that the end surface between the discharge end cover sleeve 21 and the cylinder body 1 is tightly attached and the pressure is uniform.
[0046] 2. Working process of friction surface of dynamic and static rings:
[0047] The stationary ring base 53 is fixed on the side end surface of the discharge end cover sleeve 21, and the stationary ring 54 is embedded in the stationary ring base 53 and fixed by countersunk bolts; the dynamic ring base 51 is fixed on the outer wall of the cylinder 1, and the dynamic ring 52 is embedded in the dynamic ring base 51 and fixed by countersunk bolts; so as to keep the two moving synchronously.
[0048] The dynamic ring 52 and the static ring 54 are made of ductile iron. An oil inlet can be set at the low point of the static ring 54, and an oil outlet can be set at the high point. Mineral oil with a high boiling point and high viscosity is injected into the oil inlet through a gear pump. The oil gradually fills the oil holding ring upwards, and the oil level rises to the highest point. It flows back to the oil tank through the oil outlet. At the same time, an oil cooler is set to keep the oil temperature constant, and remote control of the oil level and remote monitoring of the pump outlet pressure are set. After the oil circuit is running, the oil pressure and oil level remain normal, indicating that the operation is normal.
[0049] During normal operation, under the action of the radial cylinder body 32, the radial deviation is controllable; under the action of the axial cylinder body 42, the dynamic ring 52 and the static ring 54 are tightly pressed together to play a sealing role. At the same time, the sealing oil fills the oil holding space, which plays a further sealing role. The sealing oil seeps from the oil holding space to the friction surface, which can also play a lubricating and sealing role.
[0050] The above shows and describes the basic principle 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 by the above embodiments. The above embodiments and descriptions are only for explaining the principle 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 fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A self-adjusting end face sealing device for a rotary kiln, arranged between an end cover (2) and a cylinder (1), the end cover (2) comprising a discharge end cover sleeve (21) and a discharge end cover body (22) welded together, the discharge end cover sleeve (21) being plug-fitted with the cylinder (1), characterized in that: The discharge end cover sleeve (21) cooperates with the cylinder (1) via a preset number of radially adjustable sealing structures (3) and a preset number of axially adjustable sealing structures (4); The radial adjustment sealing structure (3) comprises a radial cylinder body (32), a radial roller (31) and a radial roller bracket (33). The axial adjustment sealing structure (4) comprises an axial cylinder body (42), an axial roller (41), an axial roller bracket (43), an axial cylinder support (45), an inner ring and outer ring connecting piece (12), an outer ring (13) and an inner ring (14).
2. The self-adjusting end face sealing device for a rotary kiln according to claim 1, characterized in that The radial cylinder body (32) is fixed to the outer wall of the discharge end cover sleeve (21) along the radial direction of the cylinder (1) via a radial cylinder support (35); a groove is provided on the outer wall of the discharge end cover sleeve (21); the radial roller (31) is fixed to the telescopic rod of the radial cylinder body (32) via a radial roller support (33); the radial roller (31) is provided with a groove to cooperate with the outer wall of the cylinder (1).
3. The self-adjusting end face sealing device for a rotary kiln according to claim 2, characterized in that The inner ring (14) is sleeved on the outer side wall of the discharge end cover sleeve (21), an outer ring (13) is arranged outside the inner ring (14), the outer ring (13) is fixed to the outer side wall of the cylinder (1) through an L-shaped inner ring and outer ring connecting piece (12), and an annular groove is enclosed between the inner ring (14) and the outer ring (13). The axial cylinder body (42) is fixed to the outer wall of the discharge end cover sleeve (21) along the axial direction of the cylinder body (1) via an axial cylinder support (45), and the axial roller (41) is fixed to the telescopic rod of the axial cylinder body (42) via an axial roller support (43). The telescopic rod of the axial cylinder body (42) is provided with an annular groove, and the axial roller (41) cooperates with the side walls of the outer ring (13) and the inner ring (14).
4. The self-adjusting end face sealing device for a rotary kiln according to claim 3, characterized in that A reinforcing angle plate (11) is also provided between the inner ring (14) and the cylinder (1).
5. The self-adjusting end face sealing device for a rotary kiln according to claim 3, characterized in that The moving ring base (51) is fixed on the outer wall of the cylinder (1), and the moving ring (52) is embedded in the moving ring base (51) and fixed by countersunk bolts.
6. The self-adjusting end face sealing device for a rotary kiln according to claim 5, characterized in that The stationary ring base (53) is fixed on the side end surface of the discharge end cover sleeve (21), and the stationary ring (54) is embedded in the stationary ring base (53) and fixed by countersunk bolts.
7. The self-adjusting end face sealing device for a rotary kiln according to claim 6, characterized in that The movable ring base (51) and the movable ring (52) are sealed with a flexible graphite gasket.
8. The self-adjusting end face sealing device for a rotary kiln according to claim 7, characterized in that The stationary ring base (53) and the stationary ring (54) are sealed with a flexible graphite gasket.