Shaft seal failure oil leakage oil return structure and compressor comprising same
By setting up an oil reservoir and return oil passage in the shaft seal cover to collect lubricating oil and guide it back into the compressor, the problem of lubricating oil leakage caused by shaft seal failure is solved, the reuse of lubricating oil and stable operation of the compressor are realized, the service life is extended and the maintenance cost is reduced.
Patent Information
- Application Number
- CN202520391219.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Wear and aging of shaft seals in compressors can lead to decreased sealing performance, resulting in lubricating oil leakage and affecting the normal operation of the machine.
An inwardly recessed oil reservoir and return oil passage are provided in the shaft seal cover to collect and guide the leaked lubricating oil back to the compressor chamber of the machine body for reuse. The return oil control device ensures unidirectional flow, and the end of the oil passage is sealed with a plug to prevent leakage.
This effectively avoids lubricating oil leakage caused by shaft seal failure, extends the compressor's service life, and reduces maintenance costs.
Smart Images
Figure CN223952810U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of shaft seal failure oil leakage and oil return structure and the compressor comprising it. BACKGROUND
[0002] As the sealing device between the internal rotor of compressor and external environment, shaft seal will experience continuous wear and aging due to factors such as lubricating oil, impurities in gas, temperature and pressure changes during the operation of compressor. Especially during installation, the parallelism of shaft seal installation surface and seat installation surface does not meet the technical requirements, which will cause uneven stress on oil seal lip, and thus deformation. Improper operation of operator during installation will also accelerate the wear of shaft seal. Under the action of many factors, the sealing performance of shaft seal is reduced, which eventually leads to high-temperature and high-pressure lubricating oil leakage in the machine body, affecting the normal operation of the machine body. SUMMARY
[0003] The utility model aims at overcoming the above-mentioned deficiencies existing in the prior art, and provides a kind of shaft seal failure oil leakage and oil return structure and the compressor comprising it.
[0004] The utility model is realized by the following technical solutions:
[0005] A kind of shaft seal failure oil leakage and oil return structure, it includes rotor, shaft seal, shaft seal cover and machine shell, the machine shell has machine body compression chamber, the shaft seal cover is connected to the machine shell, the rotor is rotatably arranged in the shaft seal cover and the machine shell, the inner wall surface of the shaft seal cover towards the rotor has inwardly recessed oil storage groove, the shaft seal is arranged between the shaft seal cover and the rotor, and the shaft seal is located between the oil storage groove and the machine shell, the shaft seal cover and the machine shell have oil return oil circuit, two ends of the oil return oil circuit are communicated with the oil storage groove and the machine body compression chamber respectively, so that the lubricating oil in the oil storage groove flows into the machine body compression chamber through the oil return oil circuit.
[0006] Further, the shaft seal failure oil leakage and oil return structure further includes oil return control device, the oil return control device is arranged in the oil return oil circuit and is used to control the one-way operation of the oil return oil circuit.
[0007] Further, the oil return oil circuit includes first oil return oil circuit and second oil return oil circuit, the first oil return oil circuit is located in the shaft seal cover, the first oil return oil circuit is communicated with the bottom of the oil storage groove, the second oil return oil circuit is located in the machine shell, two ends of the second oil return oil circuit are communicated with the first oil return oil circuit and the machine body compression chamber respectively, so that the lubricating oil in the oil storage groove flows into the machine body compression chamber through the first oil return oil circuit and the second oil return oil circuit.
[0008] Further, the first oil return channel comprises a first oil return hole and a second oil return hole, the first oil return hole extends upward from the bottom of the shaft seal cover to the bottom of the oil storage groove in the vertical direction, and the second oil return hole extends inward from the side of the shaft seal cover towards the shell in the horizontal direction to the first oil return hole, so that the oil storage groove, the first oil return hole and the second oil return hole are communicated.
[0009] Further, the second oil return channel comprises a third oil return hole, a fourth oil return hole and a fifth oil return hole, the third oil return hole extends inward from the side of the shell corresponding to the second oil return hole in the horizontal direction, the fifth oil return hole extends upward from the bottom of the shell to the body compression chamber in the vertical direction, and the fourth oil return hole extends inward from the side of the shell in the horizontal direction and communicates with the fifth oil return hole and the third oil return hole.
[0010] Further, the shaft seal failure oil leakage and oil return structure further comprises a plug, the oil return channel extends inward from the outer surface of the shaft seal cover and / or the shell, and the plug is connected to the end of the oil return channel and used for plugging the end of the oil return channel to communicate with the outside.
[0011] Further, the shaft seal failure oil leakage and oil return structure further comprises a bearing arranged between the rotor and the shell, and the shaft seal cover abuts against one side of the bearing.
[0012] A compressor comprising the shaft seal failure oil leakage and oil return structure.
[0013] The beneficial effects of the utility model lie in:
[0014] The shaft seal failure oil leakage and oil return structure and the compressor comprising the same have the advantages that the oil storage groove is arranged on the inner wall surface of the shaft seal cover towards the rotor, lubricating oil can be collected through the oil storage groove after the shaft seal fails, the oil return channel is arranged in the shaft seal cover and the shell, the lubricating oil seeping out due to the shaft seal failure is returned to the body compression chamber through the oil return channel under the action of the pressure in the compressor, the normal operation of the compressor is effectively avoided from being affected by the oil leakage due to the shaft seal failure, the service life of the compressor is prolonged, and the maintenance cost of the compressor is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is an internal structure schematic view of the shaft seal failure oil leakage and oil return structure.
[0016] Figure 2 It is another view internal structure schematic view of the shaft seal failure oil leakage and oil return structure.
[0017] MARKS OF THE DRAWINGS:
[0018] rotor 1
[0019] shaft seal 2
[0020] shaft seal cover 3
[0021] oil storage groove 31
[0022] casing 4
[0023] body compression chamber 5
[0024] oil return passage 6
[0025] first oil return hole 61
[0026] second oil return hole 62
[0027] third oil return hole 63
[0028] fourth oil return hole 64
[0029] fifth oil return hole 65
[0030] oil return control device 7
[0031] plug 8
[0032] bearing 9 DETAILED DESCRIPTION
[0033] The following description of the embodiments with reference to the drawings is to illustrate specific embodiments in which the present application can be implemented.
[0034] The present embodiment discloses a compressor comprising a shaft seal failure oil leakage and oil return structure. As shown in Figure 1 and Figure 2 , the shaft seal failure oil leakage and oil return structure comprises a rotor 1, a shaft seal 2, a shaft seal cover 3 and a casing 4, the casing 4 has a body compression chamber 5 therein, the shaft seal cover 3 is connected to the casing 4, the rotor 1 is rotatably arranged in the shaft seal cover 3 and the casing 4, the inner wall surface of the shaft seal cover 3 facing the rotor 1 has an inwardly recessed oil storage groove 31, the shaft seal 2 is arranged between the shaft seal cover 3 and the rotor 1, and the shaft seal 2 is located between the oil storage groove 31 and the casing 4, the shaft seal cover 3 and the casing 4 have an oil return passage 6 therein, the two ends of the oil return passage 6 are respectively communicated with the oil storage groove 31 and the body compression chamber 5, so that the lubricating oil in the oil storage groove 31 flows into the body compression chamber 5 through the oil return passage 6.
[0035] The shaft seal 2 is located between the oil storage groove 31 and the casing 4, and the lubricating oil in the high temperature and high pressure state in the machine body leaks outward through the shaft seal 2. The lubricating oil can be collected through the oil storage groove 31 when the shaft seal 2 fails. The oil return oil path 6 is arranged in the shaft seal cover 3 and the casing 4, and the two ends of the oil return oil path 6 are communicated with the oil storage groove 31 and the machine body compression chamber 5 respectively. The lubricating oil in the oil storage groove 31 flows into the machine body compression chamber 5 through the oil return oil path 6, so that the lubricating oil leaked due to the failure of the shaft seal 2 returns to the machine body compression chamber 5 through the oil return oil path 6 under the action of the internal pressure of the machine body, and the lubricating oil is reused. The oil storage groove 31 is arranged in the shaft seal cover 3, and the oil return oil path 6 is arranged in the shaft seal cover 3 and the casing 4, so that the bearing lubricating oil leaked due to the failure of the shaft seal 2 returns to the machine body compression chamber 5 through the oil return oil path 6 under the action of the internal pressure of the machine body; the lubricating oil can be collected and reused after the shaft seal 2 fails, and the normal operation of the machine body is not affected due to the oil leakage caused by the failure of the shaft seal 2, thereby prolonging the service life of the machine body and reducing the maintenance cost of the machine body.
[0036] In the embodiment, the oil return oil path 6 includes a first oil return oil path and a second oil return oil path. The first oil return oil path is arranged in the shaft seal cover 3 and communicated with the bottom of the oil storage groove 31. The second oil return oil path is arranged in the casing 4 and communicated with the first oil return oil path and the machine body compression chamber 5 at two ends thereof, so that the lubricating oil in the oil storage groove 31 flows into the machine body compression chamber 5 through the first oil return oil path and the second oil return oil path. The lubricating oil in the oil storage groove 31 flows downward into the first oil return oil path through the first oil return oil path, then flows into the second oil return oil path, and finally flows into the machine body compression chamber 5, thereby realizing the reuse of the lubricating oil.
[0037] Specifically, the first oil return oil path includes a first oil return hole 61 and a second oil return hole 62. The first oil return hole 61 extends upward from the bottom of the shaft seal cover 3 to the bottom of the oil storage groove 31 in the vertical direction. The second oil return hole 62 extends inward from the side of the shaft seal cover 3 facing the casing 4 to the first oil return hole 61 in the horizontal direction, so that the oil storage groove 31, the first oil return hole 61 and the second oil return hole 62 are communicated. The first oil return hole 61 and the second oil return hole 62 are simple in structure and convenient to manufacture.
[0038] The second oil return channel 6 comprises a third oil return hole 63, a fourth oil return hole 64 and a fifth oil return hole 65, the third oil return hole 63 extends horizontally and inwardly from a side of the casing 4 corresponding to the second oil return hole 62, the fifth oil return hole 65 extends vertically and upwardly from the bottom of the casing 4 to the compressor chamber 5 of the engine, and the fourth oil return hole 64 extends horizontally and inwardly from the side of the casing 4 and communicates with the fifth oil return hole 65 and the third oil return hole 63. The lubricating oil in the oil storage groove 31 flows downwardly into the first oil return hole 61, flows out of the shaft seal cover 3 through the second oil return hole 62, then flows horizontally into the third oil return hole 63, and then flows into the compressor chamber 5 of the engine through the fourth oil return hole 64 and the fifth oil return hole 65, so as to realize the reuse of the lubricating oil. Meanwhile, the third oil return hole 63, the fourth oil return hole 64 and the fifth oil return hole 65 are simple in structure and convenient to manufacture.
[0039] In the embodiment, the shaft seal failure oil leakage and return structure further comprises an oil return control device 7 arranged in the oil return channel 6 and used for controlling the one-way operation of the oil return channel 6. Specifically, the oil return control device 7 is arranged in the fifth oil return hole 65, and the one-way operation of the oil return channel 6 is controlled through the oil return control device 7, so that the lubricating oil in the oil storage groove 31 flows into the compressor chamber 5 of the engine through the oil return channel 6 for reuse, and the lubricating oil in the compressor chamber 5 of the engine is prevented from flowing into the oil return channel 6, thereby effectively avoiding the leakage of the lubricating oil due to pressure backflow. The oil return control device 7 can be a one-way valve.
[0040] The shaft seal failure oil leakage and return structure further comprises a plug 8, the oil return channel 6 extends inwardly from the outer surface of the shaft seal cover 3 and / or the casing 4, and the plug 8 is connected to the end of the oil return channel 6 and used for plugging the end of the oil return channel 6 to communicate with the outside. The plurality of plugs 8 are respectively used for plugging the ends of the first oil return hole 61, the fourth oil return hole 64 and the fifth oil return hole 65, thereby effectively preventing the lubricating oil in the oil return channel 6 from leaking and improving the stability.
[0041] The shaft seal failure oil leakage and return structure further comprises a bearing 9 arranged between the rotor 1 and the casing 4, and the shaft seal cover 3 abuts against one side of the bearing 9. The shaft seal cover 3 is used for positioning and fixing the bearing 9, thereby effectively improving the stability of the bearing 9 during use. The oil storage groove 31 and the bearing 9 are respectively located on the two sides of the shaft seal 2, and the lubricating oil on the bearing 9 is collected in the oil storage groove 31 after the shaft seal 2 fails.
[0042] The above only discloses preferred embodiments of the present application, and of course cannot limit the scope of the present application, and equivalent changes made according to the claims of the present application still fall within the scope of the present application.
Claims
1. A shaft seal failure oil leakage return structure, characterized in that, It includes a rotor, a shaft seal, a shaft seal cover, and a housing. The housing contains a compression chamber. The shaft seal cover is connected to the housing. The rotor is rotatably disposed within the shaft seal cover and the housing. The inner wall of the shaft seal cover facing the rotor has an inwardly recessed oil reservoir. The shaft seal is disposed between the shaft seal cover and the rotor, and is located between the oil reservoir and the housing. The shaft seal cover and the housing contain an oil return passage. The two ends of the oil return passage are respectively connected to the oil reservoir and the compression chamber, so that the lubricating oil in the oil reservoir flows into the compression chamber through the oil return passage.
2. The shaft seal failure oil leakage return structure as described in claim 1, characterized in that, The shaft seal failure oil leakage return structure also includes an oil return control device, which is installed in the oil return circuit and used to control the unidirectional operation of the oil return circuit.
3. The shaft seal failure oil leakage return structure as described in claim 1, characterized in that, The oil return path includes a first oil return path and a second oil return path. The first oil return path is located inside the shaft seal cover and is connected to the bottom of the oil reservoir. The second oil return path is located inside the housing, and its two ends are respectively connected to the first oil return path and the compression chamber of the machine body, so that the lubricating oil in the oil reservoir flows into the compression chamber of the machine body through the first oil return path and the second oil return path.
4. The shaft seal failure oil leakage return structure as described in claim 3, characterized in that, The first oil return path includes a first oil return hole and a second oil return hole. The first oil return hole extends vertically upward from the bottom of the shaft seal cover to the bottom of the oil reservoir. The second oil return hole extends horizontally inward from the side of the shaft seal cover facing the housing to the first oil return hole, so that the oil reservoir, the first oil return hole and the second oil return hole are connected.
5. The shaft seal failure oil leakage return structure as described in claim 4, characterized in that, The second oil return path includes a third oil return hole, a fourth oil return hole, and a fifth oil return hole. The third oil return hole extends horizontally inward from the side of the housing corresponding to the second oil return hole. The fifth oil return hole extends vertically upward from the bottom of the housing to the compression chamber of the machine body. The fourth oil return hole extends horizontally inward from the side of the housing and communicates with the fifth oil return hole and the third oil return hole.
6. The shaft seal failure oil leakage return structure as described in claim 1, characterized in that, The oil return structure for shaft seal failure and leakage also includes a plug. The oil return passage extends inward from the outer surface of the shaft seal cover and / or the housing. The plug is connected to the end of the oil return passage and is used to block the end of the oil return passage from communicating with the outside.
7. The shaft seal failure oil leakage return structure as described in claim 1, characterized in that, The shaft seal failure oil leakage return structure also includes a bearing, which is disposed between the rotor and the housing, and the shaft seal cover abuts against one side of the bearing.
8. A compressor, characterized in that, It includes the oil return structure for shaft seal failure leakage as described in any one of claims 1-7.