Self-compensating thermal expansion sealing system for cylindrical rotary reactors
The self-compensating thermal expansion sealing system for cylindrical rotary reactors addresses airtightness issues by using ring-shaped bearing races and sliding housing rings with elastic elements, ensuring reliable sealing across broad temperature fluctuations.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TECHNORED DESENVOLVIMENTO TECHNOLOGICO SA
- Filing Date
- 2021-09-17
- Publication Date
- 2026-05-13
AI Technical Summary
Existing cylindrical rotary reactors face challenges in maintaining airtightness due to thermal expansion and moving parts, especially over wide temperature ranges, with prior art failing to provide effective self-compensating thermal expansion sealing mechanisms.
A self-compensating thermal expansion sealing system for cylindrical rotary reactors, comprising first and second self-compensating portions with ring-shaped bearing races and sliding housing rings, equipped with elastic elements and side seals, to accommodate axial and radial movements, ensuring airtightness across broad temperature fluctuations.
The system effectively compensates for thermal expansion, maintaining airtightness and sealing performance over a wide temperature range, enhancing the operational reliability and efficiency of cylindrical rotary reactors.
Smart Images
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Abstract
Description
Technical Field
[0001]
[0001] The present invention relates to a thermally expanded self-compensating system. In particular, it relates to a self-compensating thermal expansion system within a cylindrical rotary reactor.
Background Art
[0002]
[0002] The most common uses of cylindrical rotary reactors are the drying of organic materials and food, the roasting and pyrolysis of biomass, and the treatment of mineral coal. Generally, these processes require a sealed reactor with a sealing system that prevents the intrusion of air or the unintentional leakage of reaction gases. In all of these applications, it is difficult to seal the reactor in view of the temperature fluctuations that the reactor undergoes, considering the thermal expansion of the reactor and the fact that the reactor has moving parts.
[0003]
[0003] Several techniques for thermal expansion compensation in cylindrical rotary reactors are known today. The following are some of the documents that disclose such mechanisms.
[0004]
[0004] Brazilian Patent No. 112013008504-5 specifies (i) an inlet for receiving biomass particles, (ii) a reactor drum configured to rotate about a rotation axis, the reactor drum having a plurality of vanes arranged at a plurality of locations along the longitudinal length of the reactor drum, the vanes being arranged in the drum at selected positions and densities to improve the properties of particles produced from biomass subjected to roasting, (iii) a heat source located upstream of the drum reactor for heating a gas contained in the system to a temperature sufficient to roast the biomass particles during operation, and (iv) The invention describes a biomass roasting system comprising (v) a fan device coupled to a stem, which generates a flow of heated gas through the drum reactor sufficient to intermittently transport biomass particles along the longitudinal length of the drum reactor as the drum reactor rotates while the system is in operation, and (v) a gas pipeline coupled to at least the drum reactor, a heat source, and a blower device, which recirculates at least a portion of the gas leaving the drum reactor back to the heat source and reheats the gas for reintroduction into the drum reactor. However, Brazilian Patent No. 112013008504-5 makes no mention of a thermal expansion self-compensating sealing mechanism for a cylindrical reactor.
[0005]
[0005] U.S. Patent Application Publication No. 20090007484 describes an apparatus and process for producing carbonaceous and / or hydrocarbon materials from a biomass composition, the apparatus comprising (i) a filling port, and (ii) a reactor comprising an inner hollow cylinder and an outer hollow cylinder, one of which is rotatable relative to the other hollow cylinder, and both heated hollow cylinders comprising a pyrolysis assembly that converts the feed composition into a vapor fraction and a solid residue fraction by supplying heat to the feed composition, (iii) vanes fitted relative to the inner and outer hollow cylinders for moving the biomass composition through the pyrolysis assembly, (iv) at least one vapor port for removing the vapor fraction containing the hydrocarbon material, and (v) at least one solid gate for removing the solid fraction containing the carbonaceous material. However, U.S. Patent Application Publication No. 20090007484 makes no mention of a thermal expansion self-compensating sealing mechanism for a cylindrical reactor.
[0006]
[0006] U.S. Patent Application Publication No. 20030202756 discloses a rotating heat treatment drum having a toothed rim that is disposed within a drum housing and supported at various peripheral points within the drum housing by evenly distributed bridge members. Each bridge member includes two clips spaced axially apart from each other and welded to the drum shell, and a cross plate connecting the clips and radially away from the drum shell. Each cross plate is rigidly connected to one clip and axially slidably connected to the other clip, thereby compensating for different degrees of thermal expansion and the resulting deformation of the cross plate, as well as increased stress on the cross plate, clips, and connection points. However, U.S. Patent Application Publication No. 20030202756 does not address the problem of ensuring gas sealing to prevent gas from entering or leaving the rotating drum.
[0007]
[0007] U.S. Patent No. 5,890,814 describes a rotating drum configuration in which the drum is mounted on a support ring such that the circumferential expansion and contraction of the drum relative to the support ring does not adversely affect the assembly. In a preferred embodiment, a drum block is mounted on the drum, and a corresponding ring block is mounted on the support ring. The side surfaces of adjacent drum blocks and ring blocks support the weight of the drum within the ring. In this configuration, the expansion and contraction of the drum can be made possible by maintaining a gap between the drum and the support ring. In a preferred embodiment, there is also a drive sprocket mounted on the drum using a sprocket mounting configuration that also accommodates the expansion and contraction of the drum. Furthermore, the issue of airtightness of the rotating drum is not discussed in the document of U.S. Patent No. 5,890,814.
[0008]
[0008] Therefore, U.S. Patent Publication No. 20030202756 and U.S. Patent No. 5890814 describe mechanisms that enable thermal expansion of cylindrical reactors, but these mechanisms have limitations on the temperature gradient so as not to allow for large expansion of the cylinder.
[0009]
[0009] Accordingly, the present invention aims to solve the above problem, since no self-compensating thermal expansion system adapted to cylindrical rotary reactors exists in the prior art, by ensuring sealing between the moving and stationary parts of the equipment, and thus ensuring the airtightness of the reaction means having a wide operating temperature range, ultimately resulting in large expansion fluctuations. [Overview of the project] [Problems that the invention aims to solve]
[0010]
[0010] The main objective of the present invention is to provide a self-compensating thermal expansion sealing system for cylindrical rotary reactors over a wide temperature range that enables higher thermal expansion compared to the prior art. [Means for solving the problem]
[0011]
[0011] To achieve the above objectives, the present invention provides a self-compensating thermal expansion sealing system for a cylindrical rotary reactor, comprising: (a) a first self-compensating portion located at the first end of the cylindrical rotary reactor, (a.1) a guide ring fixed to the support structure of the cylindrical rotary reactor, (a.2) an axial sliding housing ring adjacent to the guide ring, which slides axially relative to the guide ring, and (a.3) a first ring-shaped bearing race fixed to the rotary cylindrical reactor housing and supported on a first support roller, which slides radially relative to the axial sliding housing ring, and cylindrical A self-compensating thermal expansion sealing system is realized, comprising: (b) a first self-compensating portion having a first ring-shaped bearing race integrated with an axially sliding housing ring in the axial direction of the rotary reactor; and (b) a second self-compensating portion located at the second end of the cylindrical rotary reactor, opposite to the first end, the second self-compensating portion having (b.1) a housing ring fixed to the support structure of the cylindrical rotary reactor, and (b.2) a second ring-shaped bearing race fixed to the housing of the cylindrical rotary reactor and supported on a second support roller, the second ring-shaped bearing race rotatably sliding relative to the fixed housing ring.
[0012]
[0012] The detailed description presented below refers to the attached drawings and their respective reference numbers. [Brief explanation of the drawing]
[0013] [Figure 1] This is a side view of a cylindrical reactor equipped with a self-compensating sealing system according to a preferred embodiment of the present invention. [Figure 2] This is a detailed view of a first part of a self-compensating sealing system according to a preferred embodiment of the present invention. [Figure 3] This is a detailed view of a second part of a self-compensating sealing system according to a preferred embodiment of the present invention. [Modes for carrying out the invention]
[0014]
[0016] It should be emphasized that the following description begins with preferred embodiments of the present invention. However, as will be apparent to those skilled in the art, the present invention is not limited to these specific embodiments.
[0015]
[0017] The present invention solves the above technical problems by realizing a self-compensating thermal expansion sealing system for a cylindrical rotary reactor 2. For the purposes of this description, the cylindrical rotary reactor 2 is defined as a cylindrical rotating body, and an opening is present at the end of the cylindrical rotating body.
[0016]
[0018] According to preferred embodiments shown in Figures 1 to 3, the system of the present invention comprises a first self-compensating portion 8 located at the first end of a cylindrical rotary reactor 2 and a second self-compensating portion 9 located at the second end of the rotary cylindrical reactor 2, the second end of the rotary cylindrical reactor 2 being on the opposite side of the first end.
[0017]
[0019] In a preferred embodiment of the present invention, the first self-compensating portion 8 further comprises a first ring-shaped bearing race 22 fixed to the housing of the cylindrical rotary reactor 2, the first ring-shaped bearing race 22 being supported on a first support roller 32 which serves to slidably and rotatably support the first end of the rotary cylindrical reactor 2, as shown in Figure 1. At the opposite end, the second self-compensating portion 9 further comprises a first ring-shaped bearing race 23 attached to the housing of the cylindrical rotary reactor 2, the first ring-shaped bearing race 23 being supported on a first support roller 33 which serves to slidably and rotatably support the first end of the rotary cylindrical reactor 2.
[0018]
[0020] As can be seen in Figures 2 and 3, the corresponding bearing races 22 and 23 in the self-compensating sections 8 and 9 have a fundamental difference, namely that bearing race 23 is smooth Bearing race It is represented by the number 23a, distinct from 22. groove This bearing race 23 has the so-called grooveThe bearing roller 33 is accommodated in 23a. In this way, axial displacement with respect to the bearing race 23 is not permitted, and the expansion (or contraction) of the cylindrical rotary reactor 2 is completely transmitted to the self-compensating type portion 8 due to the heating (or cooling) of the cylindrical rotary reactor 2, whereby the bearing roller 32 slides axially on the bearing race 22.
[0019]
[0021] In addition, the first self-compensating type portion 8 includes a guide ring 80 attached to the support structure of the cylindrical rotary reactor 2. The guide ring 80 is a stationary ring.
[0020]
[0022] The first self-compensating type portion 8 also includes an axially sliding housing ring 84 surrounding the guide ring 80. The axially sliding housing ring 84 slides axially with respect to the guide ring 80 and is stationary in the rotational direction with respect to the cylindrical rotary reactor. The fact that the axially sliding housing ring 84 is axially movable with respect to the guide ring 80 enables compensation for the axial expansion of the cylindrical rotary reactor 2. The axially sliding housing ring 84 houses a first 85 in which at least one first side seal gasket 86 is installed. Dancing Ring 85 is accommodated.
[0021]
[0023] The second self-compensating type portion 9 also includes a housing ring, which is a fixed housing ring 94, and houses a second 85', and at least a second side seal 86' is fitted into the second 85'. Dancing Ring 85’ is accommodated, and the second Dancing Ring 85’ has at least a second side seal 86’ fitted thereto.
[0022]
[0024] The first bearing race 22 slides radially with respect to the axially sliding housing ring 84 It is possible. in the axial direction of the cylindrical rotary reactor 2 with respect to the axially sliding housing ring 84 tuning and slides.
[0023]
[0025] Preferably, during thermal expansion of the cylindrical rotary reactor 2, the first bearing race 22 pushes the axial sliding housing ring 84 in the opposite direction to the second self-compensating portion 9. During contraction due to cooling of the cylindrical rotary reactor 2. ,shaft Attached to the upper part of the linear sliding housing ring 84 guidance Laura 88 is Guide roller support 87, Movement of the first bearing race 22 is due to the movement of the axially sliding housing ring 84. Synchronized It plays the role of doing so. Therefore, when the cylindrical rotary reactor 2 is cooled, the first bearing race 22 "pulls" the axial sliding housing ring 84 toward the second self-compensating portion 9 by the guide roller 88 and the corresponding guide roller support 87 of the guide roller 88.
[0024]
[0026] Preferably, the guide roller 88 contacts the lateral surface of the recess of the first bearing race 22, pre-positioning the axial sliding housing ring 84 toward the first bearing race 22. Also preferably, a plurality of guide rollers 88 and guide roller supports 87 are provided along the circumference of the axial sliding housing ring 84.
[0025]
[0027] Preferably, in a preferred embodiment of the present invention, the first self-compensating portion 8 is housed in a lateral cavity of an axial housing ring 84 that slides in the axial direction. Dancing Ring Furthermore, equipped with 85, the first Dancing Ring 85 is positioned biased in the lateral direction of the bearing race 22 by at least one elastic element. More preferably, the first Dancing Ring A first side gasket 86 is provided, which is compressed between 85 and the side surface of the first bearing race 22. Dancing Ring 85 is stationary. Dancing Ring 85 and, Dancing Ring A dimensional gap exists between the axial sliding housing ring 84 into which 85 is inserted and the side cavity. Due to this gap, the first Dancing Ring 85 can move between the axis of the cylindrical rotary reactor 2 and the axis of the support structure of the cylindrical rotary reactor 2 to absorb the angular misalignment between the axes.
[0026]
[0028] Preferably, at least one elastic element is at least a first Pin spring 83. More preferably, a plurality of first Pin spring 83 is provided along the circumference of the axial sliding housing ring 84.
[0027]
[0029] Preferably, the first self-compensating portion 8 further comprises at least one lower gasket 82 compressed between the axial sliding housing ring 84 and the upper surface of the guide ring 80. Optionally, a pressure ring 81 is provided, attached to the axial sliding housing ring 84 via a screw, for adjusting the pressure of the at least one lower gasket 82.
[0028]
[0030] As can be seen in Figure 3, the second self-compensating portion 9 is located at the second end of the cylindrical rotary reactor 2, opposite to the first end. As described above, the second self-compensating portion 9 is located at the support structure of the cylindrical rotary reactor 2. Fixed It is equipped with a fixed housing ring 94.
[0029]
[0031] In addition, according to a preferred embodiment of the present invention, the second self-compensating portion 9 further comprises a second ring-shaped bearing race 23 attached to the housing of the cylindrical rotary reactor 2, the second ring-shaped bearing race 23 being supported on a second support roller 33 which serves to rotatably support the second end of the cylindrical rotary reactor 2, as shown in Figure 1.
[0030]
[0032] The second bearing race 23 is preferably fitted to fit the corresponding second support roller 33. groove The second support roller 33 is provided to prevent the bearing race 23 from moving axially relative to the cylindrical rotary reactor 2. grooveIt functions within 23a. All axial displacements due to the increase in the length of the rotating body are directed to the first self-compensating portion 8. In a preferred embodiment of the present invention, since the first bearing race 22 does not have an equivalent recess, the first support roller 32 is able to slip axially along the first bearing race 22 each time the rotating body is heated or cooled.
[0031]
[0033] Preferably, the second self-compensating portion 9 is loosely housed within the lateral cavity of the fixed housing ring 94 Dancing Ring With an additional 85', the second Dancing Ring 85' is pre-positioned toward the side of the second bearing race 23 by at least a second elastic element. More preferably, the second Dancing Ring A second side gasket 86' is provided, which is compressed between 85' and the side surface of the second bearing race 23. Dancing Ring Preferably, 85' moves between the axis of the cylindrical rotary reactor 2 and the axis of the support structure of the cylindrical rotary reactor 2 to absorb the angular misalignment between the axes, as described above. Dancing Ring It is the same as 85.
[0032]
[0034] Preferably, at least one elastic element is at least a second Pin spring It is 83'. More preferably, a plurality of second Pin spring 83' is provided along the circumference of the fixed housing ring 94.
[0033]
[0035] Preferably, the first bearing race 22 and the second bearing race 23 are mounted on the surface of the cylindrical rotary reactor 2, as shown in Figures 2 and 3, at least one attachment The first bearing race 22 and the second bearing race 23 are attached to the surface of the cylindrical rotary reactor 2 by screwing them to the ring 21. Alternatively, the first bearing race 22 and the second bearing race 23 are attached to the surface of the cylindrical rotary reactor 2 by at least one centering attachment The ring 21 is attached to the surface of the cylindrical rotary reactor 2 by welding (not shown).
[0034]
[0036] Alternatively, the first bearing race 22 and the second bearing race 23 are attached to the surface of the cylindrical rotary reactor 2 by direct welding to the surface of the cylindrical rotary reactor 2 (not shown). Alternatively, the first bearing race 22 and the second bearing race 23 are attached to the surface of the cylindrical rotary reactor 2 by direct screwing to the surface of the cylindrical rotary reactor 2 (not shown).
[0035]
[0037] Preferably, the cylindrical rotary reactor 2 is driven by a motor 50, the shaft of which has at least one gear (not shown) that engages with a ring gear 90 mounted on one of the bearing races 22, 23. More preferably, the ring gear 90 is mounted on a second bearing race 23.
[0036]
[0038] Therefore, as described above, the present invention provides a self-compensating thermal expansion sealing system for cylindrical rotary reactors with a broad temperature spectrum that enables higher thermal expansion compared to the prior art.
[0037]
[0039] Numerous modifications are permitted that may affect the scope of protection of this application. Therefore, it is emphasized that the present invention is not limited to the specific configurations / embodiments described above. The invention described in the original claims of this application is listed below. [1] In a self-compensating thermal expansion sealing system for a cylindrical rotary reactor (2), The self-compensating thermal expansion sealing system comprises a first self-compensating portion (8) and a second self-compensating portion (9), The first self-compensating portion (8) is located at the first end of the cylindrical rotary reactor (2), The first self-compensating portion (8) is, A guide ring (80) attached to the support structure of the cylindrical rotary reactor (2), An axial sliding housing ring (84) adjacent to the guide ring (80), wherein the axial sliding housing ring (84) slides relative to the guide ring (80) in the axial direction, A ring-shaped first bearing race (22) attached to the housing of the cylindrical rotary reactor (2) and supported on a first support roller (32), wherein the first bearing race (22) slides radially with respect to the axial sliding housing ring (84) and is supportable by the axial sliding housing ring (84) in the axial direction of the cylindrical rotary reactor (2) and Equipped with, The second self-compensating portion (9) is located at the second end of the cylindrical rotary reactor (2), opposite to the first end. The second self-compensating portion (9) is, The cylindrical rotary reactor (2) has a fixed housing ring (94) with respect to the support structure, A ring-shaped second bearing race (23) attached to the housing of the cylindrical rotary reactor (2) and supported on a second support roller (33), the second bearing race (23) rotatably slides relative to the fixed housing ring (94) and Equipped with A self-compensating thermal expansion sealing system characterized by the following. [2] The self-compensating thermal expansion sealing system according to [1], characterized in that the second bearing race (23) has a groove (23a) adapted to engage with the corresponding second support roller (33). [3] The first self-compensating portion (8) is housed with a gap in the side cavity of the axial sliding housing ring (84) which slides in the axial direction. Dancing Ring (85) Further accepting the first of the above Dancing Ring The self-compensating thermal expansion sealing system according to [1] or [2], characterized in that (85) is pre-positioned in the direction of the side of the first bearing race (22) by at least one first elastic element (83). [4] The second self-compensating portion (9) is loosely housed in the lateral cavity of the fixed housing ring (94) Dancing Ring (85') further comprises the second Dancing Ring A self-compensating thermal expansion sealing system according to any one of [1] to [3], characterized in that (85') is pre-positioned toward the side of the second bearing race (23) by at least a second elastic element (83'). [5] The first of the above Dancing Ring The self-compensating thermal expansion sealing system according to [3], further comprising at least one first side gasket (86) compressed between (85) and the side surface of the first bearing race (22). [6] The second of the above Dancing Ring The self-compensating thermal expansion sealing system according to [4], further comprising at least one second side gasket (86') compressed between (85') and the side surface of the second bearing race (23). [7] The self-compensating thermal expansion sealing system according to any one of [1] to [6], further comprising at least one lower gasket (82) compressed between the axial sliding housing ring (84) and the upper surface of the guide ring (80). [8] A self-compensating thermal expansion sealing system according to any one of [1] to [7], characterized in that the first self-compensating portion (8) receives at least one guide roller (88), each guide roller (88) is fixed to the upper portion of the axial sliding housing ring (84) by a support guide (87), the at least one guide roller (88) contacts the side surface of a recess of the first bearing race (22), and the axial sliding housing ring is pre-positioned to pre-position the axial sliding housing ring (84) toward the first bearing race (22). [9] The first bearing race (22) and the second bearing race (23) Screw fastening to at least one ring (21) attached to the surface of the cylindrical rotary reactor (2), Welding to at least one ring (21) attached to the surface of the cylindrical rotary reactor (2), Direct welding to the surface of the cylindrical rotary reactor (2), and Direct screw fastening to the surface of the cylindrical rotary reactor (2) A self-compensating thermal expansion sealing system according to any one of [1] to [8], characterized in that it is attached to the surface of the cylindrical rotary reactor (2) by at least one of the following.
Claims
1. In a self-compensating thermal expansion sealing system for a cylindrical rotary reactor (2), The self-compensating thermal expansion sealing system comprises a first self-compensating portion (8) and a second self-compensating portion (9), The first self-compensating portion (8) is located at the first end of the cylindrical rotary reactor (2), The first self-compensating portion (8) is, A guide ring (80) attached to the support structure of the cylindrical rotary reactor (2), An axial sliding housing ring (84) adjacent to the guide ring (80), wherein the axial sliding housing ring (84) slides relative to the guide ring (80) in the axial direction, A ring-shaped first bearing race (22) attached to the housing of the cylindrical rotary reactor (2) and supported on a first support roller (32), wherein the first bearing race (22) slides radially with respect to the axial sliding housing ring (84) and is supported by the axial sliding housing ring (84) in the axial direction of the cylindrical rotary reactor (2) and Equipped with, The second self-compensating portion (9) is located at the second end of the cylindrical rotary reactor (2), opposite to the first end. The second self-compensating portion (9) is, A fixed housing ring (94) fixed to the support structure of the cylindrical rotary reactor (2), A ring-shaped second bearing race (23) attached to the housing of the cylindrical rotary reactor (2) and supported on a second support roller (33), the second bearing race (23) rotatably slides relative to the fixed housing ring (94) and Equipped with A self-compensating thermal expansion sealing system characterized by the following.
2. The self-compensating thermal expansion sealing system according to claim 1, characterized in that the second bearing race (23) has a groove (23a) adapted to engage with the corresponding second support roller (33).
3. The self-compensating thermal expansion sealing system according to claim 1 or 2, wherein the first self-compensating portion (8) further comprises a first dancing ring (85) housed with a gap in a lateral cavity of an axially sliding housing ring (84) that slides in the axial direction, and the first dancing ring (85) is positioned to be biased in the lateral direction of the first bearing race (22) by at least one first elastic element (83).
4. The self-compensating thermal expansion sealing system according to any one of claims 1 to 3, wherein the second self-compensating portion (9) further comprises a second dancing ring (85') loosely housed in a lateral cavity of the fixed housing ring (94), and the second dancing ring (85') is positioned biased in the lateral direction of the second bearing race (23) by at least a second elastic element (83').
5. The self-compensating thermal expansion sealing system according to claim 3, further comprising at least one first side gasket (86) compressed between the first dancing ring (85) and the side surface of the first bearing race (22).
6. The self-compensating thermal expansion sealing system according to claim 4, further comprising at least one second side gasket (86') compressed between the second dancing ring (85') and the side surface of the second bearing race (23).
7. The self-compensating thermal expansion sealing system according to any one of claims 1 to 6, further comprising at least one lower gasket (82) compressed between the axial sliding housing ring (84) and the upper surface of the guide ring (80).
8. The self-compensating thermal expansion sealing system according to any one of claims 1 to 7, characterized in that the first self-compensating portion (8) comprises at least one guide roller (88), each guide roller (88) being fixed to the upper portion of the axial sliding housing ring (84) by a support guide (87), and the at least one guide roller (88) contacts the side surface of a recess in the first bearing race (22), thereby biasing and positioning the axial sliding housing ring (84) toward the first bearing race (22).
9. The first bearing race (22) and the second bearing race (23) Screw fastening to at least one mounting ring (21) attached to the surface of the cylindrical rotary reactor (2), Welding to at least one centering mounting ring (21) attached to the surface of the cylindrical rotary reactor (2), Direct welding to the surface of the cylindrical rotary reactor (2), and Direct screw fastening to the surface of the cylindrical rotary reactor (2) A self-compensating thermal expansion sealing system according to any one of claims 1 to 8, characterized in that it is attached to the surface of the cylindrical rotary reactor (2) by at least one of the following.