Mechanical seal with good lubricating and cooling effects

Abstract

The utility model relates to a mechanical seal with good lubricating and cooling effects, which comprises a sealing box body, a shaft sleeve, a rotating shaft, a moving ring and a static ring, the shaft sleeve is fixedly sleeved on the rotating shaft, a bearing is arranged between the shaft sleeve and the sealing box body, and the shaft sleeve is rotatably matched in the sealing box body through the bearing. A left oil seal and a right oil seal are arranged on the left side and the right side of the bearing of the sealing box body respectively, the left oil seal and the right oil seal abut against the shaft sleeve in a sealing mode, an assembly outer edge is integrally formed at the left end of the shaft sleeve, the movable ring is fixedly installed on the side, facing the sealing box body, of the assembly outer edge, and the static ring is fixed to the left side of the sealing box body and abuts against the movable ring. A cooling cavity is formed among the sealing box body, the shaft sleeve, the moving ring, the static ring and the left oil seal, an annular cooling groove is formed in the outer side of the position, where the bearing is located, of the sealing box body, a cooling liquid channel is formed in the sealing box body, and the cooling liquid channel is communicated with the annular cooling groove and the cooling cavity. And the lubricating and cooling problems of the bearing can be effectively solved.

Description

Technical Field

[0001] The utility model relates to a mechanical seal, in particular to a mechanical seal with good lubrication and cooling effects. Background Art

[0002] Mechanical seals are widely used in pumps, agitators and other rotating machinery in industries such as chemical engineering, petroleum, and pharmaceuticals to prevent fluid leakage. Traditional mechanical seals usually consist of a shaft sleeve, a seal housing, a dynamic ring, a static ring, etc. These components work together to maintain the sealing performance. In some applications that require high precision, bearings are also provided between the shaft sleeve and the seal housing. During use, due to the long-term load-bearing and high-speed rotation of the bearings, good lubrication and cooling are required to extend their service life and improve reliability.

[0003] In the existing mechanical seal designs with bearings, the lubrication of the bearings is usually achieved through pre-filled grease or an oil bath. However, in some special working conditions, such as high temperature, high pressure, or corrosive medium environments, relying solely on grease or oil bath lubrication cannot meet the cooling requirements of the bearings, resulting in overheating and increased wear of the bearings, and ultimately affecting the performance of the mechanical seal and the overall operating efficiency of the equipment.

[0004] In addition, when the bearings lack effective cooling measures, the increase in their temperature may also accelerate the aging of the sealing material, further shortening the service life of the mechanical seal. Most of the mechanical seal products on the market at present do not have a special design for bearing cooling, which limits their application in some harsh environments.

[0005] Therefore, developing a new type of mechanical seal structure that can not only provide reliable sealing performance but also effectively solve the lubrication and cooling problems of the bearings has become one of the urgent technical problems to be solved at present. Summary of the Utility Model

[0006] The utility model provides a mechanical seal with good lubrication and cooling effects, which solves the above problems existing in the prior art during use.

[0007] The technical solution of the utility model is realized as follows: A mechanical seal with good lubrication and cooling effects, including a seal box body, a shaft sleeve, a rotating shaft, a moving ring and a static ring. The shaft sleeve is fixedly sleeved on the rotating shaft. A bearing is arranged between the shaft sleeve and the seal box body. The shaft sleeve is rotationally matched in the seal box body through the bearing. Left and right oil seals are respectively arranged on the left and right sides of the bearing on the seal box body. Both the left and right oil seals are in contact and sealed on the shaft sleeve. An assembly outer edge is integrally formed at the left end of the shaft sleeve. The moving ring is fixedly installed on one side of the assembly outer edge facing the seal box body. The static ring is fixed on the left side of the seal box body and abuts against the moving ring. A cooling cavity is formed among the seal box body, the shaft sleeve, the moving ring, the static ring and the left oil seal. An annular cooling groove is opened on the outside of the seal box body at the position where the bearing is located. A coolant channel is opened on the seal box body. The coolant channel communicates the annular cooling groove with the cooling cavity.

[0008] Preferably, a lubricating oil channel leading to one side of the bearing is opened on the seal box body.

[0009] Preferably, the seal box body includes a left main box body and a right sub-box body. A bearing installation opening is penetrated rightward inside the left main box body. The bearing is installed in the bearing installation opening. The right sub-box body is fixed on the right side of the left main box body and forms a limit for the bearing.

[0010] Preferably, the lubricating oil channel is located on the right sub-box body.

[0011] Preferably, the coolant channel includes a coolant inlet, a horizontal cross channel, a cooling cavity circulation vertical channel, and a cooling groove channel. The upper end of the coolant inlet penetrates upward out of the seal box body and the lower end communicates with the horizontal cross channel. The left end of the horizontal cross channel communicates with the cooling cavity circulation vertical channel and the right end penetrates rightward out of the seal box body. The lower end of the cooling cavity circulation vertical channel communicates with the cooling cavity and the upper end penetrates upward out of the seal box body. The upper and lower ends of the cooling groove channel communicate the horizontal cross channel with the annular cooling groove. The cooling groove channel is coaxially arranged with the coolant inlet and the aperture is smaller than that of the coolant inlet and the horizontal cross channel. The right end of the annular cooling groove penetrates rightward out of the seal box body.

[0012] Preferably, seal plugs are inserted at the right end of the horizontal cross channel and the upper end of the cooling cavity circulation vertical channel. A plug ring is hermetically arranged at the right end of the annular cooling groove.

[0013] Preferably, a limiting plate for limiting the right oil seal is fixedly connected to the right sub-box body. The limiting plate and the shaft sleeve are in rotational fit.

[0014] In summary, the beneficial effects of the utility model are as follows:

[0015] 1. In the present utility model, a bearing is provided between the bushing and the sealing housing. The bushing is supported by the bearing to ensure the stability of the bushing and reduce friction. The left oil seal and the right oil seal provided on both sides of the bearing in the sealing housing can achieve the sealing effect on the bearing and prevent the lubricating oil in the bearing from leaking. In addition, the formation of the cooling chamber can cool the dynamic ring and the static ring, and the setting of the annular cooling groove can cool the bearing. To sum up, the present utility model can not only provide reliable sealing performance, but also effectively solve the lubrication and cooling problems of the bearing and improve the service life of the present utility model.

[0016] 2. The setting of the lubricating oil passage can facilitate the addition of lubricating oil to the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0019] In the figure: 1. Sealing housing; 11. Left main housing; 12. Right sub-housing; 13. Annular cooling groove; 14. Coolant passage; 141. Coolant inlet; 142. Horizontal cross passage; 143. Cooling chamber circulation vertical passage; 144. Cooling groove passage; 15. Lubricating oil passage; 16. Bearing mounting opening; 2. Bushing; 21. Assembly outer edge; 3. Rotating shaft; 41. Dynamic ring; 42. Static ring; 5. Bearing; 61. Left oil seal; 62. Right oil seal; 7. Cooling chamber; 81. Sealing plug; 82. Plug ring; 83. Limiting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will combine the attached drawings in the embodiments of the present utility model Figure 1 to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0021] Embodiment:

[0022] As Figure 1As shown in the figure, the utility model discloses a mechanical seal with good lubrication and cooling effects, which includes a seal housing 1, a shaft sleeve 2, a rotating shaft 3, a dynamic ring 41 and a static ring 42. The shaft sleeve 2 is fixedly sleeved on the rotating shaft 3. A bearing 5 is arranged between the shaft sleeve 2 and the seal housing 1. The shaft sleeve 2 is rotationally matched in the seal housing 1 through the bearing 5. By using the bearing 5 to support the shaft sleeve 2, the stability of the shaft sleeve 2 can be ensured, friction can be reduced, and the rotational accuracy of the rotating shaft 3 during high-speed rotation can be improved. In addition, left oil seals 61 and right oil seals 62 are respectively arranged on the left and right sides of the bearing 5 on the seal housing 1. Both the left oil seal 61 and the right oil seal 62 are abutted and sealed on the shaft sleeve 2. The left oil seal 61 and the right oil seal 62 can play a sealing role for the bearing 5 to prevent the lubricating oil in the bearing 5 from leaking. An assembly outer edge 21 is integrally formed at the left end of the shaft sleeve 2. The dynamic ring 41 is fixedly installed on the side of the assembly outer edge 21 facing the seal housing 1, and the static ring 42 is fixed on the left side of the seal housing 1 and abuts against the dynamic ring 41. A cooling cavity 7 is formed among the seal housing 1, the shaft sleeve 2, the dynamic ring 41, the static ring 42 and the left oil seal 61. The formation of the cooling cavity 7 can be used for the coolant to cool the dynamic ring 41 and the static ring 42. The seal housing 1 is provided with an annular cooling groove 13 on the outer side of the position where the bearing 5 is located. The annular cooling groove 13 can be used for the coolant to cool the bearing 5. Then, a coolant channel 14 is opened on the seal housing 1. The coolant channel 14 communicates the annular cooling groove 13 with the cooling cavity 7. The coolant channel 14 is used for the coolant to enter. It should also be noted that the utility model can be externally connected with a single-port circulation device on the coolant channel 14. This is the prior art, which usually includes a small pump or a siphon system. It can suck the coolant from a single inlet and re-inject it into the same inlet, thus forming a closed circulation system. Additionally, or a coolant outlet communicating with the cooling cavity 7 can be further opened on the seal housing 1.

[0023] Further, a lubricating oil channel 15 leading to one side of the bearing 5 is opened on the seal housing 1. The lubricating oil channel 15 is used for the lubricating oil to enter and lubricate the bearing 5. After filling with lubricating oil, the lubricating oil channel 15 can be blocked.

[0024] Specifically, the seal housing 1 includes a left main housing 11 and a right sub-housing 12. A bearing installation opening 16 is penetrated rightward inside the left main housing 11. The bearing 5 is installed in the bearing installation opening 16, and the right sub-housing 12 is fixed on the right side of the left main housing 11 and forms a limit for the bearing 5. The setting of this structure can facilitate the installation of the bearing 5.

[0025] It should also be noted that the lubricating oil channel 15 is located on the right sub-housing 12, which is convenient for the processing of the lubricating oil channel 15.

[0026] In addition, the coolant channel 14 includes a coolant inlet 141, a horizontal cross passage 142, a cooling cavity circulation vertical passage 143, and a cooling groove channel 144. The upper end of the coolant inlet 141 penetrates upward through the sealing box body 1, and the lower end communicates with the horizontal cross passage 142. The left end of the horizontal cross passage 142 communicates with the cooling cavity circulation vertical passage 143, and the right end penetrates rightward through the sealing box body 1. The lower end of the cooling cavity circulation vertical passage 143 communicates with the cooling cavity 7, and the upper end penetrates upward through the sealing box body 1. The upper and lower ends of the cooling groove channel 144 connect the horizontal cross passage 142 and the annular cooling groove 13. The cooling groove channel 144 is coaxially arranged with the coolant inlet 141 and has a smaller aperture than the coolant inlet 141 and the horizontal cross passage 142. The right end of the annular cooling groove 13 penetrates rightward through the sealing box body 1. The structural settings of the coolant inlet 141, the horizontal cross passage 142, the cooling cavity circulation vertical passage 143, and the cooling groove channel 144 are all for the purpose of being able to be processed by simple processing methods. Otherwise, it is relatively difficult to process the internally bent channels.

[0027] Furthermore, sealing plugs 81 are inserted at the right end of the horizontal cross passage 142 and the upper end of the cooling cavity circulation vertical passage 143, and a blocking ring 82 is hermetically arranged at the right end of the annular cooling groove 13, all of which are to prevent coolant leakage.

[0028] In order to improve the installation stability of the right oil seal 62, a limiting plate 83 for limiting the right oil seal 62 is fixedly connected to the right side auxiliary box body 12, and the limiting plate 83 is in rotational fit with the shaft sleeve 2.

[0029] At the same time, it should be pointed out that the terms used in the present invention, such as: "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the protection scope of the present invention.

[0030] 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 mechanical seal with good lubrication and cooling effects, comprising a seal housing, a shaft sleeve, a rotating shaft, a dynamic seal ring and a static seal ring, characterized in that: The bushing is fixedly sleeved on the rotating shaft. A bearing is provided between the bushing and the sealed housing. The bushing is rotatably fitted in the sealed housing through the bearing. Left and right oil seals are respectively provided on the left and right sides of the bearing on the sealed housing. Both the left oil seal and the right oil seal are in contact with and sealed on the bushing. An assembly outer edge is integrally formed at the left end of the bushing. The moving ring is fixedly installed on the side of the assembly outer edge facing the sealed housing. The static ring is fixed on the left side of the sealed housing and abuts against the moving ring. A cooling chamber is formed among the sealed housing, the bushing, the moving ring, the static ring and the left oil seal. An annular cooling groove is provided on the outer side of the sealed housing at the position where the bearing is located. A coolant passage is provided on the sealed housing. The coolant passage communicates the annular cooling groove with the cooling chamber.

2. The mechanical seal with good lubrication and cooling effect according to claim 1, characterized in that: A lubricating oil passage leading to one side of the bearing is provided on the sealed housing.

3. The mechanical seal with good lubrication and cooling effect according to claim 2, characterized in that: The sealed housing includes a left main housing and a right sub-housing. A bearing installation opening is provided through the left main housing in the rightward direction inside. The bearing is installed in the bearing installation opening. The right sub-housing is fixed on the right side of the left main housing and forms a limit for the bearing.

4. A mechanical seal with good lubrication and cooling effect according to claim 3, characterized in that: The lubricating oil passage is located on the right sub-housing.

5. The mechanical seal with good lubrication and cooling effect according to claim 3, characterized in that: The coolant passage includes a coolant inlet, a horizontal cross passage, a cooling chamber circulation vertical passage, and a cooling groove passage. The upper end of the coolant inlet penetrates upward out of the sealed housing and the lower end communicates with the horizontal cross passage. The left end of the horizontal cross passage communicates with the cooling chamber circulation vertical passage and the right end penetrates rightward out of the sealed housing. The lower end of the cooling chamber circulation vertical passage communicates with the cooling chamber and the upper end penetrates upward out of the sealed housing. The upper and lower ends of the cooling groove passage connect the horizontal cross passage and the annular cooling groove. The cooling groove passage is coaxially arranged with the coolant inlet and has a smaller aperture than the coolant inlet and the horizontal cross passage. The right end of the annular cooling groove penetrates rightward out of the sealed housing.

6. The mechanical seal with good lubrication and cooling effect according to claim 5, characterized in that: Sealing plugs are inserted at the right end of the horizontal cross passage and the upper end of the cooling chamber circulation vertical passage. A plug ring is hermetically provided at the right end of the annular cooling groove.

7. The mechanical seal with good lubrication and cooling effect according to claim 3, characterized in that: A limiting plate for limiting the right oil seal is fixedly connected to the right sub-housing. The limiting plate is in rotational fit with the bushing.

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