Mechanical sealing device convenient to assemble
By integrating sealing components in high-pressure mechanical sealing devices and designing a convenient disassembly structure, the problem of reduced sealing performance and cumbersome replacement is solved, and efficient and convenient sealing performance upgrades and extended service cycles are achieved.
Patent Information
- Application Number
- CN202510407269.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-06-20
AI Technical Summary
After long-term use of existing high-pressure mechanical seals, due to friction and high temperature and high pressure impact, the sealing performance between the seal ring body and the rotary shaft is reduced, and frequent disassembly and replacement of the seal ring body is required, resulting in cumbersome assembly, long time and high cost.
A conveniently assembled mechanical sealing device is designed. By integrating the sealing assembly on the annular connecting cover, and using structures such as the splicing shaft, abutment plate and fastening rod, the sealing ring body is easily disassembled and re-tightened, thereby improving the sealing performance.
It realizes efficient and convenient disassembly and assembly of the sealing device, extends the service cycle, reduces replacement costs, and improves sealing performance.
Smart Images
Figure CN120175841A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of manufacturing seals for high-pressure machinery, and particularly relates to a convenient assembled mechanical seal device. Background Art
[0002] At present, when high-temperature and high-pressure mechanical equipment is operating, it is often necessary to ensure its sealing performance. For example, in a reaction device, reaction substances need to be added inside it, so that high-temperature and high-pressure gases are generated inside the kettle body device. Generally, its internal sealing performance needs to be ensured. Thus, seals for high-pressure machinery are born. The sealing performance inside the kettle body is ensured through seals for high-pressure machinery. Existing seals for high-pressure machinery are generally sealing end covers, which are fixed to the upper end of the kettle body through the sealing end covers. The rotating shaft on the sealing end cover is rotatably connected to the sealing ring body inside the sealing end cover for pressing and sealing. In this way, the rotating shaft and the sealing ring body are rotatably and sealingly connected. Due to long-term friction and the impact of high temperature and high pressure, the rotational sealing performance between the sealing ring body and the rotating shaft becomes poor, and a gap is generated between the sealing ring body and the rotating shaft. Therefore, the sealing performance is reduced. The existing method is to replace the sealing ring body by disassembly. The disassembly and installation are relatively cumbersome, requiring a large amount of manpower and time, reducing the operation efficiency. At the same time, the replacement cost is high, which is not conducive to enterprises reducing costs. Therefore, it is necessary to upgrade the structure to improve the assembly convenience, structural sealing performance, and service life of seals for high-pressure machinery. Summary of the Invention
[0003] Aiming at the deficiencies of the above-mentioned prior art, the problem solved by the present invention is to provide a convenient assembled mechanical seal device with convenient assembly and disassembly, good structural sealing performance, and long service life.
[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows: A convenient assembled mechanical seal device, comprising a sealing end cover, a positioning bearing, a through shaft, an abutting disc, an annular connecting cover, and a sealing assembly; a positioning bearing is fixedly installed in the middle of the upper end of the sealing end cover; the through shaft is rotatably installed on the positioning bearing; a lower portion of the through shaft is fixedly sleeved with an abutting disc; the upper end of the abutting disc is connected to the positioning bearing, and the lower side of the abutting disc is rotatably connected to the sealing end cover; the annular connecting cover is installed around the upper end of the sealing end cover; the sealing assembly is integrally installed on the annular connecting cover; the sealing assembly includes a sealing ring body, a floating ring sleeve, a fastening rod, and a telescopic ring sleeve; the sealing ring body is installed around the inner side of the sealing end cover; the inner periphery of the sealing ring body is in sealing abutment with the outer periphery of the abutting disc; a floating ring sleeve is installed around the outer periphery of the sealing ring body, and the floating ring sleeve is slidably installed up and down on the annular connecting cover. A fastening rod is rotatably installed on each side of the annular connecting cover, and the lower end of the fastening rod is connected to the floating ring sleeve. The fastening rod rotates to drive the floating ring sleeve to move up and down; the inner periphery of the upper portion of the floating ring sleeve is connected to the telescopic ring sleeve, and the upper end of the telescopic ring sleeve is connected to the lower periphery of the annular connecting cover; the fastening rod rotates to drive the floating ring sleeve to move downward, and the floating ring sleeve drives the sealing ring body to move downward so that the inner periphery of the sealing ring body tightly presses against the outer periphery of the abutting disc.
[0005] Further, the positioning bearing includes a bearing inner ring and a bearing outer ring; the bearing inner ring is rotatably installed on the bearing outer ring; the through shaft is fixedly connected through the bearing inner ring; both sides of the upper end of the abutting disc are fixedly connected to the lower side of the bearing inner ring through fixing rods.
[0006] Further, an annular embedding groove is provided around the inner periphery of the floating ring sleeve; the outer periphery of the sealing ring body is embedded and installed in the annular embedding groove.
[0007] Further, threaded channels are respectively provided on both sides of the upper end of the floating ring sleeve; the lower end of the fastening rod is threadedly connected to the threaded channels; limiting guide plates are respectively provided below both sides of the annular connecting cover; both sides of the floating ring sleeve are slidably clamped on the limiting guide plates through limiting blocks.
[0008] Further, the upper end of the fastening rod extends to the outside of the upper end of the annular connecting cover, and a fastening ring is threadedly connected to the upper periphery of the fastening rod through a threaded ring surface. The fastening ring rotates on the fastening rod and presses against the upper end surface of the annular connecting cover.
[0009] Further, annular abutting protrusions are provided around the inner periphery and the outer periphery of the annular connecting cover; an annular mounting port is provided around the upper end of the sealing end cover, and annular table surfaces are provided around the inner periphery and the outer periphery of the annular mounting port. The annular abutting protrusions are abutted and installed on the annular table surfaces and are fixedly connected by screws.
[0010] Furthermore, the outer periphery of the abutting disc is in a conical ring structure with a smaller upper end and a larger lower end; the inner periphery of the sealing ring body is in a conical ring structure with a smaller upper end and a larger lower end.
[0011] Furthermore, rotating support rods are respectively arranged at both ends of the lower side of the abutting disc; an annular clamping groove is arranged around the lower part inside the sealing end cover; the outer ends of the rotating support rods are rotatably clamped on the annular clamping groove.
[0012] Furthermore, the telescopic ring sleeve is made of telescopic corrugated pipe material.
[0013] The beneficial effects of the present invention are as follows: 1. In the present invention, the entire sealing assembly is integrally installed on the annular connection cover, and the annular connection cover is installed on the sealing end cover. In this way, by directly disassembling and pulling out the annular connection cover upwards, the entire sealing assembly can be taken out, so as to replace the sealing ring body. In this way, efficient and convenient disassembly and assembly are realized. If the annular connection cover with an annular structure is directly pumped upwards, there will be no support and fixing points in the middle part of the sealing end cover, and such a structure cannot be realized. Therefore, in the present invention, the fixing structure is designed to extend downwards. The inner ring of the positioning bearing is fixedly connected to both sides of the upper end of the abutting disc through fixing rods, and then rotating support rods are respectively designed at both ends of the lower side of the abutting disc, and the outer ends of the rotating support rods are rotatably clamped on the annular clamping groove of the sealing end cover. In this way, through the sequential connection of the inner ring of the bearing, the fixing rod, the abutting disc, and the rotating support rod, a structure for positioning the middle part of the sealing end cover is realized, overcoming the technical barrier of the structural design.
[0014] 2. When the present invention is actually used, the through-axis is rotationally driven through an external driving mechanism. The through-axis drives the abutting disc to rotate, and the outer periphery of the abutting disc and the inner periphery of the sealing ring body are hermetically abutted, so as to realize a rotary sealing structure. When due to the impact of high temperature and high pressure, a friction gap is generated between the sealing ring body and the abutting disc, so that the sealing performance is reduced. In this case, the fastening rod can be rotated to drive the floating ring sleeve to move downwards, and the floating ring sleeve drives the sealing ring body to move downwards so that the inner periphery of the sealing ring body tightly presses against the outer periphery of the abutting disc. Since the outer periphery of the abutting disc is in a conical ring structure with a smaller upper end and a larger lower end and the inner periphery of the sealing ring body is in a conical ring structure with a smaller upper end and a larger lower end, the sealing ring body and the abutting disc are re-fastened to ensure the sealing performance. Therefore, the upgrade adjustment of the sealing performance can be realized, the sealing performance is better, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural diagram of the present invention.
[0016] Figure 2 is the present invention Figure 1 A partial enlarged structural schematic diagram of one side.
[0017] Figure 3 This is a schematic structural diagram of the sealing component and the annular connection cover of the present invention.
[0018] Figure 4 For the present invention Figure 3 A partial enlarged structural schematic diagram of one side. Detailed Description of the Invention
[0019] The following further describes the content of the present invention in detail with reference to the accompanying drawings.
[0020] As Figures 1 to 4 shown, a convenient assembled mechanical seal device includes a sealing end cover 1, a positioning bearing 2, a through shaft 3, an abutting disc 4, an annular connection cover 5, and a sealing component 6; a positioning bearing 2 is fixedly installed in the middle of the upper end of the sealing end cover 1; the through shaft 3 is rotatably installed on the positioning bearing 2; a lower part of the through shaft 3 is fixedly sleeved with an abutting disc 4; the upper end of the abutting disc 4 is connected to the positioning bearing 2, and the lower side of the abutting disc 4 is rotatably connected to the sealing end cover 1; the annular connection cover 5 is installed around the upper end of the sealing end cover 1; the sealing component 6 is integrally installed on the annular connection cover 5; the sealing component 6 includes a sealing ring body 61, a floating ring sleeve 62, a fastening rod 63, and a telescopic ring sleeve 64; the sealing ring body 61 is installed around the inner side of the sealing end cover 1; the inner periphery of the sealing ring body 61 is in sealing contact with the outer periphery of the abutting disc 4; a floating ring sleeve 62 is installed around the outer periphery of the sealing ring body 61, the floating ring sleeve 62 is slidably installed up and down on the annular connection cover 5, a fastening rod 63 is rotatably installed on both sides of the annular connection cover 5, the lower end of the fastening rod 63 is connected to the floating ring sleeve 62, and the fastening rod 63 rotates to drive the floating ring sleeve 62 to move up and down; the inner periphery of the upper part of the floating ring sleeve 62 is connected to a telescopic ring sleeve 64, and the upper end of the telescopic ring sleeve 64 is connected to the lower periphery of the annular connection cover 5; the fastening rod 63 rotates to drive the floating ring sleeve 62 to move downward, and the floating ring sleeve 62 drives the sealing ring body 61 to move downward so that the inner periphery of the sealing ring body 61 tightly presses against the outer periphery of the abutting disc 4.
[0021] As Figures 1 to 4 shown, for the stable installation of the through shaft 3, further, the positioning bearing 2 includes a bearing inner ring 21 and a bearing outer ring 22; the bearing inner ring 21 is rotatably installed on the bearing outer ring 22; the through shaft 3 is fixedly installed through the bearing inner ring 21; both sides of the upper end of the abutting disc 4 are fixedly connected to the lower side of the bearing inner ring 21 through fixing rods 41. For the flexible installation of the sealing ring body 61 and the floating ring sleeve 62, further, an annular embedding groove 621 is provided on the inner periphery of the floating ring sleeve 62; the outer periphery of the sealing ring body 61 is embedded and installed in the annular embedding groove 621.
[0022] As Figures 1 to 4As shown, in order to facilitate the up-and-down movement of the floating collar 62 driven by the fastening rod 63, further, threaded channels 622 are respectively provided on both sides of the upper end of the floating collar 62; the lower end of the fastening rod 63 is threadedly connected to the threaded channels 622; limiting guide plates 51 are respectively provided below both sides of the annular connection cover 5; both sides of the floating collar 62 are slidably clamped on the limiting guide plates 51 through limiting blocks 623.
[0023] As Figures 1 to 4 shown, in order to achieve the locking function, further, the upper end of the fastening rod 63 extends to the outside of the upper end of the annular connection cover 5, and a fastening ring 631 is threadedly connected to the upper part of the fastening rod 63 through a threaded annular surface. The fastening ring 631 rotates on the fastening rod 63 and presses against the upper end surface of the annular connection cover 5.
[0024] As Figures 1 to 4 shown, in order to facilitate the stable assembly of the annular connection cover 5 and the sealing end cover 1, further, annular abutting protrusions 52 are provided on the inner and outer peripheries of the annular connection cover 5; an annular mounting opening is provided on the upper periphery of the sealing end cover 1, and annular table surfaces 11 are provided on the inner and outer peripheries of the annular mounting opening. The annular abutting protrusions 52 are abutted and mounted on the annular table surfaces 11 and are fixedly connected by screws 7.
[0025] As Figures 1 to 4 shown, in order to achieve upgrade adjustment and improve the abutting sealing performance, further, the outer periphery of the abutting disc 4 has a conical structure with a smaller upper end and a larger lower end; the inner periphery of the sealing ring body 61 has a conical structure with a smaller upper end and a larger lower end.
[0026] As Figures 1 to 4 shown, in order to stably mount the abutting disc 4, further, rotating support rods 42 are respectively provided at both ends of the lower side of the abutting disc 4; an annular clamping groove 12 is provided on the inner periphery below the sealing end cover 1; the outer ends of the rotating support rods 42 are rotatably clamped on the annular clamping groove 12. Further, the telescopic collar 64 is made of telescopic bellows material.
[0027] In the present invention, the entire sealing assembly 6 is integrally installed on the annular connection cover 5, and the annular connection cover 5 is installed on the sealing end cover 1. Thus, by directly disassembling and pulling out the annular connection cover 5 upward, the entire sealing assembly 6 can be taken out, so as to replace the sealing ring body 61. In this way, efficient and convenient disassembly and assembly are achieved. However, if the annular connection cover 5 with an annular structure is directly pumped upward, there will be no support and fixing points in the middle part of the sealing end cover 1, and such a structure cannot be realized. Therefore, in the present invention, the fixing structure is designed to extend downward. The inner ring 21 of the positioning bearing 2 and both sides of the upper end of the abutting disk 4 are fixedly connected by fixing rods 41. Then, rotating support rods 42 are respectively designed at both ends of the lower side of the abutting disk 4, and the outer ends of the rotating support rods 42 are rotatably clamped on the annular slot 12 of the sealing end cover 1. Thus, through the sequential connection of the inner ring 21 of the bearing, the fixing rods 41, the abutting disk 4, and the rotating support rods 42, a structure for positioning the middle part of the sealing end cover 1 is realized, overcoming the technical barrier of the structural design.
[0028] When the present invention is actually used, the through-axis 3 is rotationally driven by an external driving mechanism. The through-axis 3 drives the abutting disk 4 to rotate, and the outer sides of the periphery of the abutting disk 4 and the inner sides of the periphery of the sealing ring body 61 are in sealing contact. Thus, a rotary sealing structure is realized. When due to the impact of high temperature and high pressure, a friction gap is generated between the sealing ring body 61 and the abutting disk 4, resulting in a reduction in the sealing performance. In this case, the fastening rod 63 can be rotated to drive the floating ring sleeve 62 to move downward. The floating ring sleeve 62 drives the sealing ring body 61 to move downward, and the inner periphery of the sealing ring body 61 is tightly pressed against the outer periphery of the abutting disk 4. Since the outer periphery of the abutting disk 4 is in a tapered structure with a smaller upper end and a larger lower end, and the inner periphery of the sealing ring body 61 is in a tapered structure with a smaller upper end and a larger lower end, the sealing ring body 61 and the abutting disk 4 are fastened again to ensure the sealing performance. Therefore, the upgrade adjustment of the sealing performance can be realized, the sealing performance is better, and the service life is long.
[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A convenient assembly type mechanical sealing device, characterized in that: It includes a sealing end cover, a positioning bearing, a connecting shaft, an abutment plate, an annular connection cover, and a sealing assembly; a positioning bearing is fixedly installed in the middle of the upper end of the sealing end cover; the connecting shaft is rotatably connected and installed on the positioning bearing; an abutment plate is fixedly sleeved and installed on the lower part of the connecting shaft; the upper end of the abutment plate is connected to the positioning bearing, and the lower side of the abutment plate is rotatably connected to the sealing end cover; the annular connection cover is installed around the upper end of the sealing end cover; the sealing assembly is integrally installed on the annular connection cover; the sealing assembly includes a sealing ring body, a floating ring sleeve, a fastening rod, and a telescopic ring sleeve; the sealing ring body is installed around the inner side of the sealing end cover; The inner side of the sealing ring body is sealed and abutted against the outer side of the abutment plate; a floating ring sleeve is installed on the outer side of the sealing ring body, and the floating ring sleeve is slidably installed on the annular connecting cover up and down, and a fastening rod is rotatably installed on both sides of the annular connecting cover, and the lower end of the fastening rod is connected to the floating ring sleeve, and the fastening rod rotates and drives the floating ring sleeve to move up and down; the inner side of the upper part of the floating ring sleeve is connected to the telescopic ring sleeve, and the upper end of the telescopic ring sleeve is connected to the lower side of the annular connecting cover; the fastening rod rotates and drives the floating ring sleeve to move downward, and the floating ring sleeve drives the sealing ring body to move downward and makes the inner side of the sealing ring body tightly pressed against the outer side of the abutment plate.
2. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: The positioning bearing comprises a bearing inner ring and a bearing outer ring; the bearing inner ring is rotatably mounted on the bearing outer ring; the through-shaft is through-fixed on the bearing inner ring; and both sides of the upper end of the abutment plate are fixedly connected to the lower side of the bearing inner ring through fixing rods.
3. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: The inner side of the floating ring sleeve is provided with an annular embedding groove around the periphery; the outer side around the sealing ring body is embedded and installed in the annular embedding groove.
4. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: Threaded channels are respectively provided on both sides of the upper end of the floating ring sleeve; the lower end of the fastening rod is threadedly screwed into the threaded channel; limit guide plates are respectively provided below both sides of the annular connecting cover; and both sides of the floating ring sleeve are slidably clamped on the limit guide plates through limit blocks.
5. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: The upper end of the fastening rod extends to the outer upper end of the annular connection cover, and a fastening ring is screwed around the upper part of the fastening rod through a threaded annular surface. The fastening ring rotates on the fastening rod and presses against the upper end surface of the annular connection cover.
6. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: The inner and outer sides of the annular connecting cover are provided with annular abutment protrusions; the upper end of the sealing end cover is provided with an annular mounting opening, and the inner and outer sides of the annular mounting opening are provided with annular table surfaces, and the annular abutment protrusions are abutted and installed on the annular table surfaces and fixedly connected by screws.
7. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: The outer side of the abutment disk is in an annular cone structure with a small upper end and a large lower end; the inner side of the sealing ring body is in an annular cone structure with a small upper end and a large lower end.
8. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: Rotating support rods are respectively arranged at the two ends of the lower side of the abutment plate; an annular clamping groove is arranged around the lower inner side of the sealing end cover; and the outer end of the rotating support rod is rotatably clamped on the annular clamping groove.
9. The convenient assembly type mechanical sealing device according to claim 1, characterized in that: The telescopic ring sleeve is made of a telescopic bellows material.