Sealing and oiling device for a rotating shaft and sealing method

Abstract

The application discloses a sealing and oil return device of a rotating shaft and a sealing method thereof, and relates to the technical field of rotating mechanical equipment. The sealing and oil return device comprises a sealing assembly and an oil return assembly. The sealing assembly comprises an oil baffle and a sealing cover. The sealing cover is fixed to the rotating equipment. A sealing space is formed between the sealing cover and the rotating equipment. The sealing cover is provided with a through hole through which the rotating shaft passes. The oil baffle is arranged in the sealing space and is fixed to the rotating shaft. The oil return assembly is connected with the sealing cover and is used for recycling oil leakage collected in the sealing space to the rotating equipment for circulation. Lubricating oil flows into the sealing space through the rotating shaft and then flows into the oil return system of the rotating equipment through the oil return assembly, so that oil leakage is avoided, and the circulation of the lubricating oil is realized. The problem of shaft seal wear and oil leakage is solved completely without large-scale disassembly of the rotating equipment.

Description

Technical Field

[0001] This application relates to the technical field of rotating machinery and equipment, and in particular to a sealing oil return device for a rotating shaft and its sealing method. Background Technology

[0002] Rotating machinery is widely used in modern industrial production. To ensure the long-term stable operation of rotating equipment, closed-loop lubrication systems are designed to lubricate the rotating parts. Additionally, internal sealing devices are incorporated to prevent lubricant leakage. However, as the equipment ages, shaft seals wear and fail, leading to widespread oil leakage. While shaft seal leakage doesn't affect the machine's overall operation, it wastes lubricant and pollutes the environment.

[0003] Currently, the traditional approach is to replace the entire rotating equipment or disassemble the rotating equipment online to replace the seal. Both methods involve extensive on-site work, high replacement costs, and prolonged production line downtime when replacing the entire rotating equipment, requiring the complete disassembly and alignment of the associated couplings and pipelines. Similarly, online disassembly and separate seal replacement involves disassembly and alignment of the associated couplings and motors, also resulting in significant on-site work and the likelihood of recurring oil leaks within a certain operating period. Neither method can completely solve the problem of oil leakage from the rotating shaft seal. Summary of the Invention

[0004] The purpose of this application is to provide a sealing oil return device and sealing method for a rotating shaft, so as to solve the technical problem of easy oil leakage at the shaft seal of rotating equipment to a certain extent.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] A first aspect of this application provides a sealing oil return device for a rotating shaft, the rotating shaft being disposed in a rotating device, comprising: a sealing assembly including an oil baffle ring and a sealing cover, the sealing cover being fixed to the rotating device, the sealing cover and the rotating device forming a sealing space, the sealing cover having a through hole for the rotating shaft to pass through, the oil baffle ring being disposed within the sealing space and fixed to the rotating shaft; and an oil return assembly connected to the sealing cover, the oil return assembly being used to recover leaked oil collected in the sealing space back into the rotating device for recycling.

[0007] In some embodiments, the oil return assembly includes an oil return connector and an oil return pipe, the oil return connector being disposed at the lower end of the sealed space, one end of the oil return pipe being connected to the oil return connector, and the other end of the oil return pipe being connected to the rotating device.

[0008] In some embodiments, a first sealing groove is provided at the connection between the sealing cover and the rotating device, and a first sealing ring is provided in the first sealing groove.

[0009] In some embodiments, the two ends of the sealing cover are fixedly connected to the rotating shaft body by bolts.

[0010] In some embodiments, a second sealing groove is provided between the oil baffle ring and the rotating shaft, and a second sealing ring is provided in the second sealing groove.

[0011] In some embodiments, the oil baffle ring is composed of two semicircular rings joined together, and the two ends of the two semicircular rings are connected by a second bolt.

[0012] A second aspect of this application provides a sealing method for a sealing return oil device of a rotating shaft, comprising the following steps:

[0013] Clean the rotating shaft and fix the oil baffle ring on the rotating shaft;

[0014] Clean the rotating equipment and install the sealing cover on the rotating equipment;

[0015] Install the oil return assembly on the sealing cover.

[0016] In some embodiments, the step of fixing the oil baffle ring to the rotating shaft includes: fixing two semicircular rings to the rotating shaft with a second bolt to ensure that there is no relative rotation between the oil baffle ring and the rotating shaft, while maintaining a gap of 5mm to 10mm between the oil baffle ring and the shaft seal in the original rotating equipment.

[0017] In some embodiments, the specific steps of installing the sealing cover on the rotating device include: fixing the sealing cover to the rotating body with a second bolt, maintaining a gap of 1-2 mm between the sealing cover and the rotating shaft, and leaving a gap of 5-10 mm between the sealing cover and the oil baffle ring.

[0018] In some embodiments, the specific steps of installing the oil return assembly on the sealing groove include: installing an oil return connector on the lower side of the sealing cover, installing an oil return pipe on the oil return connector, and then connecting the oil return pipe to the oil return system of the rotating equipment.

[0019] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0020] This application discloses a sealing oil return device for a rotating shaft. By installing an oil baffle ring and a sealing cover on the rotating equipment, when oil leakage occurs at the shaft seal of the rotating equipment, the lubricating oil flows into the sealing space through the rotating shaft. Under the action of the oil baffle ring and the sealing cover, it enters the lower part of the sealing space and then flows into the oil return system of the rotating equipment through the return assembly, thereby preventing oil leakage and realizing the recycling of lubricating oil. This completely solves the problem of shaft seal wear and oil leakage without large-scale disassembly of the rotating equipment. Compared with traditional methods, it can greatly reduce processing costs, increase processing speed, and reduce the impact on production line production.

[0021] This application discloses a sealing method for a rotary shaft sealing oil return device. By installing an oil baffle ring and a sealing cover on the rotary equipment, when oil leakage occurs at the shaft seal of the rotary equipment, the lubricating oil flows into the sealing space through the rotary shaft. Under the action of the oil baffle ring and the sealing cover, it enters the lower part of the sealing space and then flows into the oil return system of the rotary equipment through the return assembly, thereby preventing oil leakage and realizing the recycling of lubricating oil. This method completely solves the problem of shaft seal wear and oil leakage without large-scale disassembly of the rotary equipment. Compared with traditional methods, it can greatly reduce processing costs, increase processing speed, and reduce the impact on production line production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a sealing oil return device for a rotating shaft according to an embodiment;

[0024] Figure 2 This is a partial structural schematic diagram of a sealing oil return device for a rotating shaft according to an embodiment;

[0025] Figure 3 This is a side view of a sealing oil return device for a rotating shaft according to an embodiment;

[0026] Figure 4 This is a flowchart illustrating a sealing method for a rotary shaft sealing oil return device according to an embodiment.

[0027] The reference numerals in the attached drawings are explained as follows: 100, rotating equipment; 101, shaft seal; 102, rotating shaft; 200, sealing assembly; 210, oil retaining ring; 211, second sealing ring; 213, semi-circular ring; 214, second bolt; 220, sealing cover; 221, first sealing ring; 222, first bolt; 300, oil return assembly; 301, oil return connector; 302, oil return pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connection," "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Please see Figure 1 and Figure 2 .

[0033] Figure 1 This is a schematic diagram of the structure of a sealing oil return device for a rotating shaft according to an embodiment of this application. Figure 2This is a partial structural schematic diagram of a sealing oil return device for a rotating shaft according to an embodiment of this application. As shown in the figure, the device includes: a sealing assembly 200, including an oil baffle ring 210 and a sealing cover 220. The sealing cover 220 is fixed to the rotating device 100, and a sealing space is formed between the sealing cover 220 and the rotating device 100. The sealing cover 220 has a through hole for the rotating shaft 102 to pass through. The oil baffle ring 210 is disposed in the sealing space and fixed to the rotating shaft 102; and an oil return assembly 300, connected to the sealing cover 220. The oil return assembly 300 is used to recover the leaked oil collected in the sealing space and return it to the rotating device 100 for recycling. By installing an oil baffle ring 210 and a sealing cover 220 on the rotating equipment 100, when oil leakage occurs at the shaft seal 101 of the rotating equipment 100, the lubricating oil flows into the sealing space through the rotating shaft 102. Under the action of the oil baffle ring 210 and the sealing cover 220, it enters the lower part of the sealing space and then flows into the oil return system of the rotating equipment 100 through the return assembly, thereby preventing oil leakage and realizing the recycling of lubricating oil. The problem of wear and oil leakage of the shaft seal 101 is completely solved without large-scale disassembly of the rotating equipment. Compared with traditional methods, it can greatly reduce processing costs, increase processing speed, and reduce the impact on production line production.

[0034] In this embodiment, the sealing cover 220, the oil baffle ring, and the shaft seal 101 on the rotating device 100 are arranged in parallel on the rotating shaft 102, with a gap of 5 to 10 mm between each component. Oil leakage at the shaft seal 101 flows to the bottom of the oil return cover, and the oil baffle ring is used to prevent oil leakage from being thrown out along the rotating shaft 102.

[0035] In this embodiment, the oil return assembly 300 includes an oil return connector 301 and an oil return pipe 302. The oil return connector 301 is disposed at the lower end of the sealed space. One end of the oil return pipe 302 is connected to the oil return connector 301, and the other end of the oil return pipe 302 is connected to the rotating device 100. By connecting the oil return pipe 302 to the oil return system of the rotating device 100, the lubricating oil can be recycled.

[0036] In this embodiment, a first sealing groove is provided at the connection between the sealing cover 220 and the rotating device 100, and a first sealing ring 221 is provided in the first sealing groove to increase the airtightness between the sealing cover 220 and the rotating device.

[0037] In this embodiment, the two ends of the sealing cover 220 are fixedly connected to the rotating shaft body by the first bolt 222.

[0038] In this embodiment, a second sealing groove is provided between the oil baffle ring 210 and the rotating shaft 102, and a second sealing ring 211 is provided in the second sealing groove. The airtightness between the rotating shaft 102 and the oil baffle ring 210 is increased by the second sealing ring 211.

[0039] Please see Figure 3 ;

[0040] In this embodiment, the oil baffle ring 210 is composed of two semi-circular rings 213 spliced ​​together, and the two ends of the two semi-circular rings 213 are connected by a second bolt 214.

[0041] Please see Figure 4 , Figure 4 This is a flowchart illustrating a sealing method for a rotary shaft sealing oil return device according to this embodiment. As shown in the figure, it includes the following steps:

[0042] S1: Clean the rotating shaft 102 and fix the oil baffle ring 210 on the rotating shaft 102;

[0043] Specifically, the two semicircular rings 213 are fixedly spliced ​​to the rotating shaft 102 by the second bolt 214 to ensure that there is no relative rotation between the oil baffle ring 210 and the rotating shaft 102, while maintaining a gap of 5mm to 10mm between the oil baffle ring 210 and the shaft seal 101 in the original rotating equipment 100.

[0044] S2: Clean the rotating equipment 100 and install the sealing cover 220 on the rotating equipment 100;

[0045] Specifically, the surface of the original housing sealing end cover is cleaned to ensure a flat surface. The original sealing end is removed, and the sealing cover 220 is fixed to the rotating body by the second bolt 214. A gap of 1-2mm is maintained between the sealing cover 220 and the rotating shaft 102, and a gap of 5-10mm is left between the sealing cover 220 and the oil baffle ring.

[0046] S3: Install the oil return assembly 300 on the sealing cover 220.

[0047] Specifically, an oil return connector 301 is installed on the lower side of the sealing cover 220, an oil return pipe 302 is installed on the oil return connector 301, and then the oil return pipe 302 is connected to the oil return system of the rotating equipment 100.

[0048] By installing an oil baffle ring 210 and a sealing cover 220 on the rotating equipment 100, when oil leakage occurs at the shaft seal 101 of the rotating equipment 100, the lubricating oil flows into the sealing space through the rotating shaft 102. Under the action of the oil baffle ring 210 and the sealing cover 220, it enters the lower part of the sealing space and then flows into the oil return system of the rotating equipment 100 through the return assembly, thereby preventing oil leakage and realizing the recycling of lubricating oil. The problem of wear and oil leakage of the shaft seal 101 is completely solved without large-scale disassembly of the rotating equipment. Compared with traditional methods, it can greatly reduce processing costs, increase processing speed, and reduce the impact on production line production.

[0049] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0050] This application discloses a sealing oil return device for a rotating shaft. By installing an oil baffle ring and a sealing cover on the rotating equipment, when oil leakage occurs at the shaft seal of the rotating equipment, the lubricating oil flows into the sealing space through the rotating shaft. Under the action of the oil baffle ring and the sealing cover, it enters the lower part of the sealing space and then flows into the oil return system of the rotating equipment through the return assembly, thereby preventing oil leakage and realizing the recycling of lubricating oil. This completely solves the problem of shaft seal wear and oil leakage without large-scale disassembly of the rotating equipment. Compared with traditional methods, it can greatly reduce processing costs, increase processing speed, and reduce the impact on production line production.

[0051] This application discloses a sealing method for a rotary shaft sealing oil return device. By installing an oil baffle ring and a sealing cover on the rotary equipment, when oil leakage occurs at the shaft seal of the rotary equipment, the lubricating oil flows into the sealing space through the rotary shaft. Under the action of the oil baffle ring and the sealing cover, it enters the lower part of the sealing space and then flows into the oil return system of the rotary equipment through the return assembly, thereby preventing oil leakage and realizing the recycling of lubricating oil. This method completely solves the problem of shaft seal wear and oil leakage without large-scale disassembly of the rotary equipment. Compared with traditional methods, it can greatly reduce processing costs, increase processing speed, and reduce the impact on production line production.

[0052] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sealing oil return device for a rotating shaft, wherein the rotating shaft is disposed in a rotating device, characterized in that, include: A sealing assembly includes an oil baffle ring and a sealing cover. The sealing cover is fixed to the rotating device, and a sealing space is formed between the sealing cover and the rotating device. The sealing cover has a through hole for the rotating shaft to pass through. The oil baffle ring is disposed in the sealing space and is fixed to the rotating shaft. An oil return assembly is connected to the sealing cover. The oil return assembly is used to recover the leaked oil collected in the sealed space and recycle it in the rotating equipment. The oil return assembly includes an oil return connector and an oil return pipe. The oil return connector is located at the lower end of the sealed space. One end of the oil return pipe is connected to the oil return connector, and the other end of the oil return pipe is connected to the rotating equipment. By connecting the return oil pipe to the return oil system of the rotating equipment, the lubricating oil can be recycled. The connection between the sealing cover and the rotating device is provided with a first sealing groove, and a first sealing ring is provided in the first sealing groove; The oil baffle ring is composed of two semicircular rings joined together, and the two ends of the two semicircular rings are connected by a second bolt.

2. The sealing oil return device for a rotating shaft according to claim 1, characterized in that, The two ends of the sealing cover are fixedly connected to the rotating shaft body by the first bolt.

3. The sealing oil return device for a rotating shaft according to claim 1, characterized in that, A second sealing groove is provided between the oil baffle ring and the rotating shaft, and a second sealing ring is provided in the second sealing groove.

4. A sealing method for a rotary shaft sealing oil return device according to any one of claims 1 to 3, characterized in that, Includes the following steps: Clean the rotating shaft and fix the oil baffle ring on the rotating shaft; Clean the rotating equipment and install the sealing cover on the rotating equipment; Install the oil return assembly on the sealing cover.

5. The sealing method of the sealing oil return device for a rotating shaft according to claim 4, characterized in that, The step of fixing the oil baffle ring on the rotating shaft includes: The two semicircular rings are fixedly spliced ​​onto the rotating shaft by the second bolt to ensure that there is no relative rotation between the oil baffle ring and the rotating shaft, while maintaining a gap of 5mm to 10mm between the oil baffle ring and the shaft seal in the original rotating equipment.

6. The sealing method of the sealing oil return device for a rotating shaft according to claim 4, characterized in that, The specific steps for installing the sealing cover on the rotating equipment include: The sealing cover is fixed to the rotating body by the second bolt. A gap of 1-2 mm is maintained between the sealing cover and the rotating shaft, and a gap of 5-10 mm is maintained between the sealing cover and the oil baffle ring.

7. The sealing method of the sealing oil return device for a rotating shaft according to claim 4, characterized in that, The specific steps for installing the oil return assembly on the sealing groove include: Install a return oil connector on the lower side of the sealing cover, install a return oil pipe on the return oil connector, and then connect the return oil pipe to the return oil system of the rotating equipment.

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