CN113565882B - Front end cover sealing structure for preventing oil leakage of high-speed generator - Google Patents
Front end cover sealing structure for preventing oil leakage of high-speed generator Download PDFInfo
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- CN113565882B CN113565882B CN202110878174.8A CN202110878174A CN113565882B CN 113565882 B CN113565882 B CN 113565882B CN 202110878174 A CN202110878174 A CN 202110878174A CN 113565882 B CN113565882 B CN 113565882B
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- sealing
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- bearing
- sealing ring
- end cover
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- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
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- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
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- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/20—Application independent of particular apparatuses related to type of movement
- F16C2300/22—High-speed rotation
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- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
Abstract
The invention belongs to the field of alternating-current generators and relates to a front end cover sealing structure for preventing oil leakage of a high-speed generator. The device comprises a bearing bush (1), a driving end cover (2), a first 0-type sealing ring (3), a bearing cover (4), a sealing baffle cover (5), 6 metal sealing baffle rings (6), an outer sealing ring baffle sleeve (8), an inner sealing ring baffle sleeve (9) and a second 0-type sealing ring (11); the invention is realized by adding metal dynamic seal and non-metal static seal at the front end cover assembly, the bearing chamber assembly and other parts of the motor and changing the shape and the matching side clearance of the sealing cover at the front end, and the design of the structure can realize the reliable sealing of the bearing and prevent lubricating oil from entering the bearing. The sealing structure is simple, the implementation effect is good, and the sealing structure is more suitable for the complex working environment of the system.
Description
Technical Field
The invention belongs to the field of alternating-current generators and relates to a front end cover sealing structure for preventing oil leakage of a high-speed generator.
Background
The invention of the sealing structure is based on that a high-speed generator coaxially rotates with a certain main speed reducer, the main speed reducer has splashed lubricating oil, and when the generator is poorly sealed, once the lubricating oil leaks into the grease-lubricated bearing of the generator, grease of the bearing is damaged, so that lubricating grease in the bearing is lost and even dried. Under the condition of high-speed operation of a bearing with poor lubrication, the friction inside the bearing is increased to generate high temperature, a bearing retainer is damaged, and balls deform and shift, so that the inner ring and the outer ring of the bearing are not concentric, and further the bearing fails. And the stator, the rotor and other components close to one end of the damaged bearing are seriously swept, so that the generator is seriously failed.
Disclosure of Invention
The purpose of the invention is: the grease lubrication bearing is subjected to anti-splashing oil sealing design by the structure, so that the generator can work reliably and safely even if the main speed reducer has splashing lubricating oil leakage, and the motor fault caused by the failure of the bearing due to the leakage of the splashing oil of the generator is effectively reduced.
The technical scheme of the invention is as follows:
a front end cover sealing structure for preventing oil leakage of a high-speed generator comprises a bearing bush 1, a driving end cover 2, a first 0-type sealing ring 3, a bearing cover 4, a sealing baffle cover 5, 6 metal sealing baffle rings 6, an outer sealing ring baffle sleeve 8, an inner sealing ring baffle sleeve 9 and a second 0-type sealing ring 11; the bearing bush 1 and the bearing cap 4 are coaxially and fixedly installed on the driving end cover 20, before installation, the first 0-type sealing ring 3 is installed in a groove of the bearing cap 4, the bearing 10 is pressed in the bearing bush 1, the 6 metal sealing check rings 6 are divided into two groups, the two groups are simultaneously and respectively installed in a groove on one side of an outer sealing ring baffle sleeve 8 and a groove on one side of an inner sealing ring baffle sleeve 9, the second 0-type sealing ring 11 is simultaneously installed in a groove on the other side of the outer sealing ring baffle sleeve 8 and the groove on the other side of the inner sealing ring baffle sleeve 9, the inner sealing ring baffle sleeve 9 and the outer sealing ring baffle sleeve 8 which are installed with the sealing check rings 6 and the second 0-type sealing rings 11 are respectively pressed at two ends of the bearing 10, and the sealing baffle cap 5 is coaxially and press-installed on a small step of the outer sealing ring baffle sleeve 8.
The metal sealing retainer ring 6 is an elastic ring with a notch, the thickness of the elastic ring is 0.65-0.75 mm, and the free width of the notch is 3-3.5 mm. The material is tempered carbon steel, the excircle of the section of the circular ring is in the shape of a circular arc, and the circular ring is compressed after being installed in the bearing bush 1 and is attached and positioned with the inner hole of the bearing bush 1 by 360 degrees.
The gaps of the 3 metal retainer rings 6 in the same group are distributed at 120 degrees in the circumferential direction.
The bearing cover 4 is of a circular ring structure, and the size of an inner hole is in interference fit with the outer circle of the metal sealing retainer ring 6.
The sealing baffle cover 5 is an aluminum alloy thin-wall part, the wall thickness is 1 +/-0.1 mm, and the size of the excircle and the size of the inner hole of the driving end cover 2 are matched with each other by a clearance of 0.2-0.25 mm.
The first type 0 sealing ring 3 and the second type 0 sealing ring 11 are small-section rubber sealing rings with oil resistance, and the section diameters are 1 +/-0.07 mm.
And a cylindrical pin 7 is added at the joint of the sealing baffle cover 5 and the outer sealing ring baffle sleeve 8.
The width of the groove formed by matching the outer sealing ring retaining sleeve 8, the inner sealing ring retaining sleeve 9 and the metal sealing retaining ring 6 is 2.2-2.3 mm.
The inner ring of the bearing 10 is coaxially pressed on the hollow shaft 12.
The elastic shaft 13 is connected with the hollow shaft 12 through a spline to transmit torque, and the hollow shaft 13 and the bearing 10 are driven to rotate at a high speed.
The invention has the beneficial effects that: the sealing structure of the high-speed generator is designed by increasing a metal dynamic seal and a non-metal static seal at the positions of a front end cover assembly, a bearing chamber assembly and the like of the motor and changing the shape and the matching side clearance of a sealing cover at the front end. The sealing structure is simple, the implementation effect is good, and the sealing structure is more suitable for the complex working environment of the system.
Drawings
FIG. 1 is a schematic view of the installation of the seal of the present invention.
FIG. 2 is a schematic view of the structure of a retainer ring 6 of the present invention
Fig. 3 shows a schematic view of the installation of the sealing gasket 6 according to the invention.
FIG. 4 is a schematic view of the installation of the first O-ring of the present invention.
FIG. 5 is a schematic view of the installation of the second O-ring of the present invention
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, a front end cover sealing structure for preventing oil leakage of a high-speed generator comprises a bearing bush 1, a driving end cover 2, a first 0-type sealing ring 3, a bearing cover 4, a sealing baffle cover 5, 6 metal sealing baffle rings 6, an outer sealing ring baffle sleeve 8, an inner sealing ring baffle sleeve 9 and a second 0-type sealing ring 11; the bearing bush 1 and the bearing cap 4 are coaxially and fixedly installed on the driving end cover 20, before installation, the first 0-type sealing ring 3 is installed in a groove of the bearing cap 4, the bearing 10 is pressed in the bearing bush 1, the 6 metal sealing check rings 6 are divided into two groups, the two groups are simultaneously and respectively installed in a groove on one side of an outer sealing ring baffle sleeve 8 and a groove on one side of an inner sealing ring baffle sleeve 9, the second 0-type sealing ring 11 is simultaneously installed in a groove on the other side of the outer sealing ring baffle sleeve 8 and the groove on the other side of the inner sealing ring baffle sleeve 9, the inner sealing ring baffle sleeve 9 and the outer sealing ring baffle sleeve 8 which are installed with the sealing check rings 6 and the second 0-type sealing rings 11 are respectively pressed at two ends of the bearing 10, and the sealing baffle cap 5 is coaxially and press-installed on a small step of the outer sealing ring baffle sleeve 8. The gaps of the 3 metal retainer rings 6 are 120 degrees in the circumferential direction.
The bearing bush 1 is a barrel-shaped structure with a boss, one end of the bearing bush 1 is pressed on the outer circular surface of the metal sealing retainer ring 6, and the boss at the other end is fixed on the driving end cover 2.
The bearing cover 4 is of a circular ring structure, and the size of an inner hole is in interference fit with the outer circle of the metal sealing retainer ring 6.
The sealing baffle cover 5 is an aluminum alloy thin-wall part, the wall thickness is (1 +/-0.1) mm, and the fit clearance between the size of the excircle and the size of the inner hole of the driving end cover 2 is (0.2-0.25) mm.
The metal sealing retainer ring 6 is an elastic circular ring with a notch, the thickness T is (0.65-0.75) mm, the free width L of the notch is (3-3.5) mm, the material is tempered carbon steel, the excircle of the section of the circular ring is in an arc shape, and the metal sealing retainer ring is compressed after being installed in the bearing bush 1 and is attached and positioned with the inner hole of the bearing bush 1 by 360 degrees.
The outer sealing ring retaining sleeve 8 is annular, a groove matched with the metal sealing retaining ring 6 is arranged on the outer circumferential surface, a groove matched with the second 0-type sealing ring 11 is arranged on the inner hole, and a boss matched with the sealing retaining cover 5 is arranged on the end face of one side. The size of the outer circle of the boss is in interference fit with the size of the sealing baffle cover 5.
The inner sealing ring retaining sleeve 9 is annular, a groove matched with the metal sealing retaining ring 6 is arranged on the outer circumferential surface, and a groove matched with the second 0-type sealing ring 11 is arranged on the inner hole.
The first type 0 sealing ring 3 and the second type 0 sealing ring 11 are small-section rubber sealing rings with oil resistance, and the section diameters are (1 +/-0.07) mm.
And a cylindrical pin 7 is added at the joint of the sealing baffle cover 5 and the outer sealing ring baffle sleeve 8.
The width of the groove where the outer sealing ring retaining sleeve 8, the inner sealing ring retaining sleeve 9 and the metal sealing retaining ring 6 are matched is (2.2-2.3) mm
The inner ring of the bearing 10 is coaxially pressed on the hollow shaft 12.
The elastic shaft 13 is connected with the hollow shaft 12 through a spline to transmit torque, and the hollow shaft 13 and the bearing 10 are driven to rotate at a high speed.
The installation method of the invention comprises the following steps: the bearing 10 is pressed in the bearing bush 1 as shown in figure 1, an inner sealing ring spacer sleeve 9 and an outer sealing ring spacer sleeve 8 are arranged at two ends of the bearing, and the bearing cover 4 is used as a high-speed rotating part to form dynamic seal with the driving end cover 2 of the motor by utilizing a gap of (0.2-0.25) mm. Meanwhile, the bearing bush 1, the bearing 10, the outer sealing ring retaining sleeve 8, the 6 metal sealing retaining rings 6, the first 0-type sealing ring 3 and the second 0-type sealing ring 11 are arranged. According to the figure 3, the open grooves of each 3 metal retainer rings 6 are arranged in the grooves 8 and 9 at an angle of 120 degrees in the circumferential direction, and are matched with the grooves 8 and 9 and are positioned in 360-degree fit with the inner hole of the bearing bush 1 to form a metal dynamic seal. The first 0-type sealing ring 3 and the second 0-type sealing ring 11 are matched with the grooves of the sealing cover 4, the inner sealing ring spacer sleeve 9 and the outer sealing ring spacer sleeve 8 to form static sealing, and the installation schematic diagrams are shown according to the attached figures 4 and 5. The metal retainer ring 6 is used for protecting the bearing system, can block grease, lubricant and prevent water or other pollutants from entering key parts, and is used in an environment preventing a large amount of polluted liquid. The sealing retainer ring is particularly suitable for occasions with high rotating speed and severe environment, and the most typical application is that the sealing retainer ring can prevent dirt from entering a component structure in an environment with a large amount of dirt and dust. The bearing 10 ensures that lubricating oil of the system cannot enter the bearing through dynamic and static sealing of the structure.
Claims (10)
1. A front end cover sealing structure for preventing oil leakage of a high-speed generator is characterized by comprising a bearing bush (1), a driving end cover (2), a first 0-type sealing ring (3), a bearing cover (4), a sealing baffle cover (5), 6 metal sealing baffle rings (6), an outer sealing ring baffle sleeve (8), an inner sealing ring baffle sleeve (9) and a second 0-type sealing ring (11); the bearing bush (1) and the bearing cover (4) are coaxially and fixedly installed on the driving end cover (2), the first 0-type sealing ring (3) is installed in a groove of the bearing cover (4) before installation, the bearing (10) is pressed in the bearing bush (1), the 6 metal sealing check rings (6) are divided into two groups, the two groups are simultaneously and respectively installed in a groove on one side of an outer sealing ring check sleeve (8) and an inner sealing ring check sleeve (9), the second 0-type sealing ring (11) is simultaneously installed in grooves on the other sides of the outer sealing ring check sleeve (8) and the inner sealing ring check sleeve (9), the inner sealing ring check sleeve (9) and the outer sealing ring check sleeve (8) which are installed with the metal sealing check rings (6) and the second 0-type sealing ring (11) are respectively pressed at two ends of the bearing (10), and the sealing check cover (5) is coaxially and fixedly installed on a small step of the outer sealing ring check sleeve (8).
2. The front end cover sealing structure for preventing the oil leakage of the high-speed generator according to claim 1, wherein the metal sealing retainer ring (6) is an elastic ring with a notch, the thickness of the elastic ring is 0.65-0.75 mm, the free width of the notch is 3-3.5 mm, the material of the metal sealing retainer ring is tempered carbon steel, the excircle of the section of the ring is in the shape of an arc, and the metal sealing retainer ring is compressed after being installed in the bearing bush (1) and is attached and positioned with the inner hole of the bearing bush (1) for 360 degrees.
3. The front end cover sealing structure for preventing oil leakage of a high-speed generator according to claim 2, characterized in that gaps of 3 metal sealing check rings (6) in the same group are distributed at 120 degrees in the circumferential direction.
4. The front end cover sealing structure for preventing the oil leakage of the high-speed generator according to claim 1, wherein the bearing cover (4) is of a circular ring structure, and the size of an inner hole is in interference fit with the outer circle of the metal sealing retainer ring (6).
5. The front end cover sealing structure for preventing oil leakage of the high-speed generator according to claim 1, wherein the sealing baffle cover (5) is an aluminum alloy thin-wall part, the wall thickness is 1 +/-0.1 mm, and the fit clearance between the size of the excircle and the size of the inner hole of the driving end cover (2) is 0.2-0.25 mm.
6. The front end cover sealing structure for preventing oil leakage of the high-speed generator according to claim 1, wherein the first type 0 seal ring (3) and the second type 0 seal ring (11) are small-section rubber seal rings with oil resistance, and the section diameter is 1 ± 0.07mm.
7. The front end cover sealing structure for preventing oil leakage of the high-speed generator according to claim 1, characterized in that a cylindrical pin (7) is added at the joint of the sealing baffle cover (5) and the outer sealing ring baffle sleeve (8).
8. The front end cover sealing structure for preventing oil leakage of the high-speed generator according to claim 1, wherein the width of the groove where the outer sealing ring spacer sleeve (8), the inner sealing ring spacer sleeve (9) and the metal sealing retainer ring (6) are matched is 2.2-2.3 mm.
9. The front end cover sealing structure for preventing oil leakage of a high-speed generator according to claim 1, wherein the inner ring of the bearing (10) is coaxially press-fitted on the hollow shaft (12).
10. The front end cover sealing structure for preventing oil leakage of the high-speed generator according to claim 1, wherein an elastic shaft (13) is installed in the hollow shaft (12), and the elastic shaft (13) and the hollow shaft (12) are connected through a spline to transmit torque so as to drive the hollow shaft (12) and the bearing (10) to rotate at a high speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110878174.8A CN113565882B (en) | 2021-07-30 | 2021-07-30 | Front end cover sealing structure for preventing oil leakage of high-speed generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110878174.8A CN113565882B (en) | 2021-07-30 | 2021-07-30 | Front end cover sealing structure for preventing oil leakage of high-speed generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113565882A CN113565882A (en) | 2021-10-29 |
| CN113565882B true CN113565882B (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110878174.8A Active CN113565882B (en) | 2021-07-30 | 2021-07-30 | Front end cover sealing structure for preventing oil leakage of high-speed generator |
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| CN113565882A (en) | 2021-10-29 |
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