CN114483797B - Bearing sealing method under high pollution environment - Google Patents
Bearing sealing method under high pollution environment Download PDFInfo
- Publication number
- CN114483797B CN114483797B CN202210134195.3A CN202210134195A CN114483797B CN 114483797 B CN114483797 B CN 114483797B CN 202210134195 A CN202210134195 A CN 202210134195A CN 114483797 B CN114483797 B CN 114483797B
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- Prior art keywords
- bearing
- gas
- main flow
- balance
- channel
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- 238000007789 sealing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000011859 microparticle Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 10
- 231100000719 pollutant Toxicity 0.000 abstract description 10
- 239000002245 particle Substances 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/762—Sealings of ball or roller bearings by means of a fluid
- F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The application provides a bearing sealing method in a high pollution environment, which comprises the steps of installing a bearing outside a main flow channel, and arranging balance air channels at two ends of the bearing; introducing main flow gas and substances to be transported into a main flow channel, and introducing balance gas into a bearing cavity through the balance gas channel; the pressure of the balance gas is basically the same as or the same as the pressure of the main stream gas, and is 0.2 Mpa-0.4 Mpa. According to the bearing sealing method under the high-pollution environment, the balanced gas with the gas pressure basically consistent with or the same as that of the main flow gas is introduced into the bearing cavity, so that the gas pressure difference between the main flow channel and the bearing cavity is reduced, further, pollutants are effectively prevented from entering the bearing, and the phenomenon that the bearing is invalid due to the entry of the pollutants is avoided.
Description
Technical Field
The application belongs to the technical field of bearing sealing, relates to a bearing sealing method, and in particular relates to a bearing sealing method under a high-pollution environment.
Background
Bearings are the core of the rotor system, and whether they are able to function properly will directly affect the performance and life of the rotor system. The sealing problem is a key problem affecting the service life of the bearing, so that optimizing the sealing of the bearing is an important measure for improving the working stability of the bearing.
The currently adopted bearing lubrication sealing technology or method mainly adopts two methods of self-contained sealing and externally-added sealing. The self-contained seal is generally provided with a bearing with a dust cover, a sealing ring and the like, the seal occupies small space, is convenient to install and disassemble and has lower manufacturing cost, but is generally used for sealing the bearing with the external environment. The external sealing is divided into a non-contact type sealing and a contact type sealing, wherein the contact type sealing can further accelerate the abrasion between the bearing and the sealing ring when the rotor system is in a high-pressure environment in the rotor, and the maintenance is inconvenient in the mode, so that the external sealing is difficult to apply to the working condition that the internal environment of the rotor is high in pressure and pollution; the non-contact sealing method adopted in the prior art cannot maintain a good sealing effect under a high-pressure environment inside the rotor system.
From the above analysis, it is known that the bearing seal commonly adopted in the prior art cannot cope with the high-pollution environment, so that the pollutants easily enter the bearing in the high-pollution environment, and the bearing is disabled.
Disclosure of Invention
Aiming at the defects existing in the prior art, the application aims to provide a bearing sealing method under a high-pollution environment, and solve the technical problem that a bearing is easy to fail under the high-pollution environment in the prior art.
In order to solve the technical problems, the application adopts the following technical scheme:
a bearing sealing method under high pollution environment is characterized in that the bearing is arranged outside a main flow channel, and balance air channels are arranged at two ends of the bearing; introducing main flow gas and substances to be transported into the main flow channel, and introducing balance gas into the bearing cavity through the balance gas channel.
The application also has the following technical characteristics:
preferably, the main stream gas is clean air with the air pressure of 0.2 Mpa-0.4 Mpa and the temperature of 18-120 ℃; the balance gas is clean air with the air pressure of 0.2 Mpa-0.4 Mpa and the temperature of 18-120 ℃.
Most preferably, the main stream gas is clean air with the air pressure of 0.4Mpa and the temperature of 100 ℃; the balance gas is the same as the main stream gas.
Specifically, the substance to be transported is solid microparticles; the average grain diameter of the substance to be transported is less than or equal to 10 mu m, and the maximum grain diameter of the substance to be transported is less than or equal to 50 mu m.
Specifically, a bearing box shell is arranged outside the main flow channel, and a left bearing and a right bearing are respectively arranged on two sides in the bearing box shell;
a left end cover is arranged at one end of the bearing box shell, which is close to the left bearing, a left mounting hole is formed in the left end cover, and a space between the left bearing and the left end cover is a left bearing cavity; one end of a left balance air channel is arranged in the left mounting hole, one end of the left balance air channel is communicated with the left bearing cavity, and the other end of the left balance air channel is communicated with the outside;
a right end cover is arranged at one end of the bearing box shell, which is close to the right bearing, a right mounting hole is formed in the right end cover, and a space between the right bearing and the right end cover is a right bearing cavity; one end of a right balance air channel is arranged in the right mounting hole, one end of the right balance air channel is communicated with the right bearing cavity, and the other end of the right balance air channel is communicated with the outside;
the main flow gas and the substances to be transported enter the main flow channel from the opening at the top end of the main flow channel; the balance gas is introduced from the outside, enters the left bearing cavity through the left balance gas channel, and enters the right bearing cavity through the right balance gas channel.
Specifically, a sealing ring is arranged on one side of the left bearing far away from the left end cover; and a sealing ring is arranged on one side of the right bearing far away from the right end cover.
Specifically, one end of a transmission shaft is rotatably arranged in the left bearing and the right bearing, and one end of the transmission shaft penetrates through the main flow channel and is propped against the inner wall of the left end cover; the other end of the transmission shaft is rotatably arranged on the main motor; the transmission shaft is connected with the main motor through a coupler.
Specifically, a gear is rotatably arranged on a transmission shaft positioned in the main flow channel, and the gear is positioned between the left bearing and the right bearing.
Compared with the prior art, the application has the following technical effects:
according to the bearing sealing method under the high-pollution environment, the balance gas with the air pressure slightly lower than that of the main flow gas is introduced into the bearing cavity, so that the air pressure difference between the main flow channel and the bearing cavity is reduced, further, pollutants are effectively prevented from entering the bearing, and the phenomenon that the bearing is invalid due to the entry of the pollutants is avoided.
And (II) the bearing sealing method under the high-pollution environment is simple to operate, high in applicability and wide in application prospect, and can be applied to corresponding equipment, so that the running stability of the equipment can be improved, and the service life of the equipment can be prolonged.
Drawings
FIG. 1 is a schematic illustration of a method of sealing a bearing in a highly contaminated environment.
The meaning of each reference numeral in the figures is: 1-main flow channel, 2-bearing box shell, 3-left bearing, 4-right bearing, 5-left end cover, 6-left mounting hole, 7-left bearing cavity, 8-left balance gas channel, 9-right end cover, 10-right mounting hole, 11-right bearing cavity, 12-balance gas channel, 13-sealing ring, 14-transmission shaft, 15-main motor, 16-coupling, 17-gear, 18-main flow gas and 19-balance gas.
The following examples illustrate the application in further detail.
Detailed Description
In order to ensure the transportation of particulate matter such as sand, pressure is typically applied at the inlet of the main flow channel to facilitate the transportation of such particulate matter. In the transportation process of the granular substances, the common bearing sealing method is difficult to block pollutants from entering the bearing, so that the bearing is invalid after the pollutants enter the bearing, and further the transportation cannot be smoothly carried out.
Based on the analysis, the application provides a bearing sealing method under a high-pollution environment, and the method reduces the air pressure difference between the main flow channel and the bearing cavity by introducing balanced gas with the air pressure basically consistent or identical with that of main flow gas into the bearing cavity, thereby effectively preventing pollutants from entering the bearing and avoiding bearing failure.
In the application, the following components are added:
the high pollution environment is the environment in which the particulate matter in the main flow passage is polluted by the particulate matter such as sand grains when the particulate matter in the main flow passage is transported.
The solid microparticles are particulate matters such as sand particles having an average particle diameter of 10 μm or less and a maximum particle diameter of 50 μm or less.
All parts and devices of the present application are known in the art, unless otherwise specified.
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
Examples:
the embodiment discloses a bearing sealing method in a high pollution environment, as shown in fig. 1, a bearing is arranged outside a main flow channel, and balance air channels are arranged at two ends of the bearing; the main flow gas and the substance to be transported are introduced into the main flow channel, and the balance gas is introduced into the bearing cavity through the balance gas channel.
As a specific scheme of the embodiment, the main stream gas and the balance gas are clean air with the air pressure of 0.4Mpa and the temperature of 100 ℃.
As a specific embodiment of this embodiment, the average particle diameter of the substance to be transported is 10 μm or less and the maximum particle diameter is 50 μm or less.
As a specific scheme of the embodiment, a bearing box shell 2 is arranged outside the main flow channel 1, and a left bearing 3 and a right bearing 4 are respectively arranged on two sides in the bearing box shell 2;
a left end cover 5 is arranged at one end of the bearing box shell 2 close to the left bearing 3, a left mounting hole 6 is formed in the left end cover 5, and a space between the left bearing 3 and the left end cover 5 is a left bearing cavity 7; one end of a left balance air channel 8 is arranged in the left mounting hole 6, one end of the left balance air channel 8 is communicated with the left bearing cavity 7, and the other end of the left balance air channel 8 is communicated with the outside;
a right end cover 9 is arranged at one end of the bearing box shell 2 close to the right bearing 4, a right mounting hole 10 is formed in the right end cover 9, and a right bearing cavity 11 is formed in a space between the right bearing 4 and the right end cover 9; one end of a right balance air channel 12 is arranged in the right mounting hole 10, one end of the right balance air channel 12 is communicated with the right bearing cavity 11, and the other end of the right balance air channel 12 is communicated with the outside;
the main flow gas 18 and the substances to be transported enter the main flow channel 1 from the opening at the top end of the main flow channel 1; balance gas 19 is introduced from the outside, enters the left bearing chamber 7 via the left balance gas channel 8, and enters the right bearing chamber 11 via the right balance gas channel 12.
In this embodiment, the left end cover 5 and the right end cover 9 can play a sealing role on the left bearing and the right bearing, so that the left bearing 3 and the right bearing 4 are isolated from the external environment, and further the protection role on the left bearing 3 and the right bearing 4 is realized.
As a specific scheme of the embodiment, a sealing ring 13 is arranged on one side of the left bearing 3 far away from the left end cover 5; a sealing ring 13 is arranged on one side of the right bearing 4 far away from the right end cover 9; the seal ring 13 can further enhance the sealing effect of the left bearing 3 and the right bearing 4.
As a specific scheme of the embodiment, one end of a transmission shaft 14 is rotatably arranged in the left bearing 3 and the right bearing 4, and one end of the transmission shaft 14 penetrates through the main flow channel 1 and abuts against the inner wall of the left end cover 5; the other end of the transmission shaft 14 is rotatably arranged on the main motor 15; the drive shaft 14 and the main motor 15 are connected by a coupling 16.
As a specific scheme of the embodiment, a gear 17 is rotatably mounted on the transmission shaft 14 in the main flow channel 1, and the gear 17 is located between the left bearing 3 and the right bearing 4.
As a specific scheme of the embodiment, the transmission shaft 14 and the main motor 15 are connected through the coupling 16, so that the power of the main motor 15 is transmitted to the transmission shaft 14, and the transmission shaft 14 drives the gear 17 to rotate, so that smooth transportation of the substance to be transported is ensured.
In this embodiment, the left bearing 3 and the right bearing 4 can still work normally after running continuously for 30 minutes, and can still work normally after running continuously. By the bearing sealing method in the high-pollution environment, pollutants can be effectively prevented from entering the bearing, the phenomenon that the bearing fails due to the entering of the pollutants is avoided, the bearing can stably operate for a long time, and the service lives of the bearing and corresponding equipment are prolonged.
Comparative example:
this comparative example discloses a bearing sealing method in a highly polluted environment, which is different from the embodiment in that no balance gas passages are provided at both ends of the bearing, and no balance gas is introduced into the bearing chamber.
In this comparative example, the left bearing 3 and the right bearing 4 were not operated within 1 to 2 minutes, and it was checked that sand dust entered the inside of the left bearing 3 and the right bearing 4 due to the pressure difference, causing the bearings to lock.
Claims (7)
1. A bearing sealing method under a high pollution environment is characterized in that a bearing is arranged outside a main flow channel, and balance air channels are arranged at two ends of the bearing; introducing main flow gas and substances to be transported into a main flow channel, and introducing balance gas into a bearing cavity through the balance gas channel;
a bearing box shell (2) is arranged outside the main flow channel (1), and a left bearing (3) and a right bearing (4) are respectively arranged on two sides in the bearing box shell (2);
a left end cover (5) is arranged at one end, close to the left bearing (3), of the bearing box shell (2), a left mounting hole (6) is formed in the left end cover (5), and a space between the left bearing (3) and the left end cover (5) is a left bearing cavity (7); one end of a left balance air channel (8) is arranged in the left mounting hole (6), one end of the left balance air channel (8) is communicated with the left bearing cavity (7), and the other end of the left balance air channel (8) is communicated with the outside;
a right end cover (9) is arranged at one end, close to the right bearing (4), of the bearing box shell (2), a right mounting hole (10) is formed in the right end cover (9), and a space between the right bearing (4) and the right end cover (9) is a right bearing cavity (11); one end of a right balance air channel (12) is arranged in the right mounting hole (10), one end of the right balance air channel (12) is communicated with the right bearing cavity (11), and the other end of the right balance air channel (12) is communicated with the outside;
the main flow gas (18) and the substances to be transported enter the main flow channel (1) from the opening at the top end of the main flow channel (1); the balance gas (19) is introduced from the outside, enters the left bearing cavity (7) through the left balance gas channel (8), and enters the right bearing cavity (11) through the right balance gas channel (12).
2. The method for sealing a bearing in a highly polluted environment as claimed in claim 1, wherein said main stream gas is clean air having a pressure of 0.2Mpa to 0.4Mpa and a temperature of 18 ℃ to 120 ℃; the balance gas is clean air with the air pressure of 0.2 Mpa-0.4 Mpa and the temperature of 18-120 ℃.
3. The method for sealing a bearing in a highly polluted environment as claimed in claim 2, wherein said main stream gas is clean air having a pressure of 0.4Mpa and a temperature of 100 ℃; the balance gas is the same as the main stream gas.
4. The method for sealing a bearing in a highly contaminated environment according to claim 1, wherein the substance to be transported is solid microparticles; the average grain diameter of the substance to be transported is less than or equal to 10 mu m, and the maximum grain diameter of the substance to be transported is less than or equal to 50 mu m.
5. A method for sealing a bearing in a highly polluted environment as claimed in claim 1, characterized in that a sealing ring (13) is mounted on the side of the left bearing (3) remote from the left end cover (5); and a sealing ring (13) is arranged on one side of the right bearing (4) far away from the right end cover (9).
6. The bearing sealing method under the high-pollution environment according to claim 1, wherein one end of a transmission shaft (14) is rotatably arranged in the left bearing (3) and the right bearing (4), and one end of the transmission shaft (14) penetrates through the main flow channel (1) and is abutted against the inner wall of the left end cover (5); the other end of the transmission shaft (14) is rotatably arranged on the main motor (15); the transmission shaft (14) is connected with the main motor (15) through a coupler (16).
7. A method of sealing a bearing in a highly contaminated environment according to claim 6, characterized in that a gear (17) is rotatably mounted on a drive shaft (14) located in the main flow channel (1), the gear (17) being located between the left bearing (3) and the right bearing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210134195.3A CN114483797B (en) | 2022-02-14 | 2022-02-14 | Bearing sealing method under high pollution environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210134195.3A CN114483797B (en) | 2022-02-14 | 2022-02-14 | Bearing sealing method under high pollution environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114483797A CN114483797A (en) | 2022-05-13 |
| CN114483797B true CN114483797B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210134195.3A Active CN114483797B (en) | 2022-02-14 | 2022-02-14 | Bearing sealing method under high pollution environment |
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| Country | Link |
|---|---|
| CN (1) | CN114483797B (en) |
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| GB2270724A (en) * | 1992-09-19 | 1994-03-23 | Systematic Drill Head Co Ltd | Machine tools |
| JPH11344128A (en) * | 1994-04-18 | 1999-12-14 | Kawasaki Steel Corp | Arrangement for bearing-shield and method for use of the same |
| US6467774B1 (en) * | 2000-08-28 | 2002-10-22 | The United States Of America As Represented By The Secretary Of The Navy | Axially pressure balanced floating seal system |
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| JPH11344128A (en) * | 1994-04-18 | 1999-12-14 | Kawasaki Steel Corp | Arrangement for bearing-shield and method for use of the same |
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| CN114483797A (en) | 2022-05-13 |
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