CN110748418B - Radial oil collecting ring, and under-ring lubricating device and method for aero-engine bearing - Google Patents
Radial oil collecting ring, and under-ring lubricating device and method for aero-engine bearing Download PDFInfo
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- CN110748418B CN110748418B CN201910892995.XA CN201910892995A CN110748418B CN 110748418 B CN110748418 B CN 110748418B CN 201910892995 A CN201910892995 A CN 201910892995A CN 110748418 B CN110748418 B CN 110748418B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/16—Cooling of plants characterised by cooling medium
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rolling Contact Bearings (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention provides a radial oil collecting ring, and a lubricating device and a method under a ring of an aeroengine bearing, wherein the radial oil collecting ring comprises a left cylindrical wall, a left annular retaining wall, an oil collecting blade, a right annular retaining wall and a right cylindrical wall which are sequentially arranged from left to right; a plurality of oil collecting blades which are arranged along the circumference are arranged between the left annular retaining wall and the right annular retaining wall. The oil supply lubricating device under the ring comprises a radial oil collecting ring, a main shaft, two bearings sleeved on the main shaft, a bearing seat sleeved outside the bearings and an oil supply nozzle arranged on the bearing seat and connected with an oil supply way; the oil supply nozzle penetrates into the bearing seat and is aligned with the oil receiving groove; the radial oil collecting ring is sleeved on the main shaft and can synchronously rotate with the main shaft, and two ends of the radial oil collecting ring are respectively clung to the end parts of the bearings. The radial oil collecting ring can improve the oil collecting efficiency of the radial oil collecting ring, distribute the lubricating oil to different lubricating points in proportion and greatly improve the lubricating and cooling effects of the bearing.
Description
Technical Field
The invention belongs to the field of bearing oil supply lubrication, and relates to a radial oil collecting ring, and an under-ring lubrication device and method for an aircraft engine bearing.
Background
The high-speed rolling bearing is an essential element in an aircraft engine supporting system, the rotating speed and the load of a main shaft of an aircraft engine are continuously increased along with the improvement of the performance of the aircraft engine, the working condition of the main shaft bearing is very harsh, meanwhile, high-temperature fuel gas can transfer more heat to a heat end bearing, and in order to ensure that the main shaft bearing stably works under the conditions of high speed, heavy load and high temperature, a high-performance aircraft engine lubricating system needs to provide a proper amount of lubricating oil to fully lubricate and cool the main shaft bearing.
Grease lubrication, oil mist lubrication and oil-gas lubrication are all difficult to satisfy the lubrication and cooling requirements of the main shaft bearing of the aircraft engine far away, and lubricating oil is difficult to enter the bearing under the high-speed condition in the traditional direct injection lubrication. And when the structural space of the bearing cavity allows or the main bearing DN is more than 2.5 multiplied by 106mm r/min, the oil supply under the ring is adopted for lubrication, and the lubricating and cooling effect on the bearing when the oil supply under the ring is adopted is superior to that of direct injection lubrication. The lubricating oil sprayed by the oil supply nozzle in the under-ring lubricating structure is deflected, crushed and splashed under the influence of the high-speed airflow generated by the rotation of the oil collecting ring, and in order to ensure that the lubricating oil sprayed by the oil supply nozzle enters the oil collecting ring as much as possible and is not thrown out, parameters such as the oil collecting ring structure, the oil groove of the bearing inner ring, the oil hole, the aperture, the direction and the like of the oil supply nozzle need to be accurately designed.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a radial oil collecting ring, an under-ring lubricating device of an aeroengine bearing and a method thereof, and solves the problems of low lubricating efficiency, poor cooling effect and the like of the prior bearing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a radial oil collecting ring comprises the following components arranged from left to right in sequence: the oil collecting device comprises a left cylindrical wall, a left annular baffle wall, an oil collecting blade, a right annular baffle wall and a right cylindrical wall; the left cylindrical wall, the left annular blocking wall, the right annular blocking wall and the right cylindrical wall are coaxially and oppositely arranged, the planes of the left annular blocking wall and the right annular blocking wall are perpendicular to the axes of the left cylindrical wall and the right cylindrical wall, the left annular blocking wall is arranged at the edge of one end of the left cylindrical wall, and the right annular blocking wall is arranged at the edge of one end of the right cylindrical wall;
a plurality of oil receiving blades which are circumferentially distributed are arranged between the left annular retaining wall and the right annular retaining wall, and an oil receiving groove is defined by the left annular retaining wall, the right annular retaining wall and the oil receiving blades; one end of the oil receiving blade is a blade tip, the other end of the oil receiving blade is a blade root, and the groove depth of the oil receiving groove from the blade tip to the blade root is gradually increased; the blade tip of each oil collecting blade is adjacent to the blade root of the previous oil collecting blade but not contacted with the blade tip so as to form a through oil collecting inlet below the blade tip;
the inner walls of the left cylindrical wall and the right cylindrical wall are respectively provided with an oil conveying groove which is axial and communicated with the oil receiving inlet, the oil conveying grooves in the left cylindrical wall are uniformly distributed along the circumferential direction of the left cylindrical wall, and the oil conveying grooves in the right cylindrical wall are uniformly distributed along the circumferential direction of the right cylindrical wall.
The invention also comprises the following technical characteristics:
specifically, an oil distribution boss is arranged on an oil receiving blade at the inner opening of the oil receiving inlet, the proportion of lubricating oil flowing to bearings on two sides is controlled by adjusting the axial position of the highest point of the oil distribution boss on the inner surface of the oil receiving blade, and meanwhile, the oil distribution boss can reduce the throwing amount of the lubricating oil after the lubricating oil enters the radial oil receiving ring.
Specifically, be equipped with between two adjacent oil receiving blades and keep off the oil blade, each oil blade that keeps off arranges along oil receiving blade place circumference, and the both ends of keeping off the oil blade are sharp portion and root respectively, the root of keeping off the oil blade with the blade root is adjacent, and the sharp portion of keeping off the oil blade upwards extends to the apex that is close to oil receiving blade, and the sharp portion of keeping off the oil blade can form between main shaft and keep off the oil space, can block by receiving the interior surface reflection of oil blade and the lubricating oil that splashes outwards throws away along oil receiving entry.
Specifically, an oil collecting blade inner groove is formed from the top of the blade tip of the oil collecting blade to the middle rear part of the oil collecting blade, and lubricating oil entering along the oil collecting blade inner groove and the oil collecting inlet converges at the blade root of the oil collecting blade and then flows to oil conveying grooves on two sides respectively.
Specifically, the blade tip is provided with a blade tip baffle which is vertical to the surface of the blade tip and has a certain width, and the width of the blade tip baffle which is vertical to the surface of the blade tip is determined according to the rotating speed of the radial oil receiving ring and the oil supply amount of lubricating oil.
Specifically, the plurality of oil collecting blades are uniformly distributed along the circumference.
The invention also provides a lubricating device under the ring of the aeroengine bearing, which comprises the radial oil collecting ring and also comprises: the main shaft, two bearings sleeved on the main shaft, a bearing seat sleeved outside the bearings and an oil supply nozzle arranged on the bearing seat and connected with an oil supply path; the oil supply nozzle penetrates into the bearing seat and is aligned with the oil receiving groove;
the radial oil collecting ring is sleeved on the main shaft and can synchronously rotate with the main shaft, and two ends of the radial oil collecting ring are respectively clung to the end parts of the bearings.
Specifically, the bearing includes a bearing inner ring in contact with the main shaft, a bearing outer ring, and rollers held by a cage disposed between the bearing inner ring and the bearing outer ring.
Specifically, a plurality of axial oil conveying grooves which are uniformly distributed along the circumferential direction and are in one-to-one butt joint with the oil conveying grooves are formed in the inner wall of the bearing inner ring, circumferential oil grooves which are arranged along the circumferential direction and are communicated with the axial oil conveying grooves are further formed in the inner wall of the bearing inner ring, and radial oil holes which penetrate through the inner portion of the bearing are formed in the circumferential oil grooves; the oil conveying groove and the circumferential oil groove are positioned on two sides of the axial oil conveying groove.
The invention also provides an under-ring lubrication method of an aeroengine bearing, which is realized by adopting the device and specifically comprises the following steps:
the lubricating oil is sprayed out at a certain speed through the oil supply nozzle and flows to an oil receiving inlet of the radial oil receiving ring, the radial oil receiving ring rotates at a high speed to cut lubricating oil jet flow, the lubricating oil flows inwards along the inner surface of the oil receiving blade, the lubricating oil is distributed through the oil distribution boss and then flows to oil transmission grooves on two sides, and meanwhile, the lubricating oil continues to flow to the blade root of the oil receiving blade along the inner surface of the oil receiving blade; when the radial oil collecting ring rotates at a high speed, the airflow speed and the pressure at the foremost end of the oil collecting blade tip are highest, a shielding area is formed at the middle rear part of the blade tip along the circumferential direction, the airflow speed and the pressure are both greatly reduced compared with the front end of the blade tip, after the groove is formed, lubricating oil enters from the top of the blade tip of the oil collecting blade and flows to the blade root of the oil collecting blade along an internal groove of the oil collecting blade, and the lubricating oil is converged at the blade root of the oil collecting blade along the internal surface of the oil collecting blade at an oil collecting inlet and then flows to oil conveying grooves at two sides of the radial oil collecting ring;
the lubricating oil entering the radial oil receiving ring oil conveying groove continuously flows to the axial oil conveying groove on the bearing inner ring and then flows to the radial oil hole of the bearing inner ring, and the lubricating oil is thrown into the bearing along the radial oil hole under the action of centrifugal force to lubricate and cool each component of the bearing.
For convenient installation, the circumferential width of the radial oil receiving ring oil conveying groove is larger than that of the axial oil conveying groove on the bearing inner ring; when the lubricating oil enters the oil receiving inlet and flows along the oil receiving blade, part of the lubricating oil entering the radial oil receiving ring under the action of high-speed rotating centrifugal force can cross the oil distribution boss and be thrown out along the surface of the oil receiving blade, when the lubricating oil flows to the blade tip baffle, the lubricating oil enters the oil receiving ring again after the flowing direction is changed along the inner surface of the blade tip baffle, and the blade tip baffle of the oil receiving blade can effectively prevent the lubricating oil from being thrown out of the oil receiving channel; the oil jet entering the radial oil-collecting ring along the oil-collecting inlet has very obvious reflection and splashing phenomena when impacting the inner surface of the oil-collecting blade, part of the reflected and splashed oil enters an oil-blocking space formed by the oil-blocking blade and the main shaft, the flow speed of the part of the oil is far lower than the tangential speed of the radial oil-collecting ring at the radius position, and the part of the oil flows to the inside of the radial oil-collecting ring along the inner surface of the oil-collecting blade again along with the rotation of the radial oil-collecting ring.
Compared with the prior art, the invention has the beneficial technical effects that:
the radial oil collecting ring can improve the oil collecting efficiency of the radial oil collecting ring, distribute the lubricating oil to different lubricating points in proportion and greatly improve the lubricating and cooling effects of the bearing.
The lubricating oil entering from the inner groove of the oil collecting blade of the radial oil collecting ring can additionally increase the oil collecting amount of the radial oil collecting ring, and the tip boss and the oil baffle blade of the oil collecting blade can respectively reduce the lubricating oil amount thrown out under the action of centrifugal force and the reflection splashing amount of the lubricating oil jet impacting the surface of the oil collecting blade; the oil collecting efficiency and the oil collecting quantity of the radial oil collecting ring can be improved, the lubricating and cooling requirements of the main bearing of the aero-engine are met, and the safe, reliable and stable operation of the main bearing is ensured.
In the invention, the lubricating oil is sprayed out by an oil supply nozzle at a certain speed and then flows to an oil receiving inlet of a radial oil receiving ring, the radial oil receiving ring rotates at a high speed to cut lubricating oil jet flow, then the lubricating oil flows inwards along the inner surface of an oil receiving blade, the lubricating oil is distributed by an oil distribution boss and then flows to oil transmission grooves at two sides, and meanwhile, the lubricating oil continues to flow to the blade root of the oil receiving blade along the inner surface of the oil receiving blade; when the radial oil collecting ring rotates at a high speed, the airflow speed and the pressure at the foremost end of the oil collecting blade tip are highest, a shielding area is formed at the middle rear part of the blade tip along the circumferential direction, the airflow speed and the pressure are both greatly reduced compared with the front end of the blade tip, after the groove is formed, lubricating oil enters from the top of the blade tip of the oil collecting blade and flows to the blade root of the oil collecting blade along an internal groove of the oil collecting blade, and the lubricating oil is converged at the blade root of the oil collecting blade along the internal surface of the oil collecting blade at an oil collecting inlet and then flows to oil conveying grooves at two sides of the radial oil collecting ring; the lubricating oil entering the radial oil receiving ring oil conveying groove continuously flows to the axial oil conveying groove on the bearing inner ring and then flows to the radial oil hole of the bearing inner ring, and the lubricating oil is thrown into the bearing along the radial oil hole under the action of centrifugal force to lubricate and cool each component of the bearing. For convenient installation, the circumferential width of the radial oil receiving ring oil conveying groove is larger than that of the axial oil conveying groove on the bearing inner ring; when the lubricating oil enters the oil receiving inlet and flows along the oil receiving blade, part of the lubricating oil entering the radial oil receiving ring under the action of high-speed rotating centrifugal force can cross the oil distribution boss and be thrown out along the surface of the oil receiving blade, when the lubricating oil flows to the blade tip baffle, the lubricating oil enters the oil receiving ring again after the flowing direction is changed along the inner surface of the blade tip baffle, and the blade tip baffle of the oil receiving blade can effectively prevent the lubricating oil from being thrown out of the oil receiving channel; the oil jet entering the radial oil-collecting ring along the oil-collecting inlet has very obvious reflection and splashing phenomena when impacting the inner surface of the oil-collecting blade, part of the reflected and splashed oil enters an oil-blocking space formed by the oil-blocking blade and the main shaft, the flow speed of the part of the oil is far lower than the tangential speed of the radial oil-collecting ring at the radius position, and the part of the oil flows to the inside of the radial oil-collecting ring along the inner surface of the oil-collecting blade again along with the rotation of the radial oil-collecting ring.
Drawings
FIG. 1 is a schematic view of the overall construction of the radial oil slinger of the present invention;
FIG. 2 is a cross-sectional view of the radial oil slinger of the present invention;
FIG. 3 is a cross-sectional view B-B of FIG. 2 of the present invention;
FIG. 4 is an enlarged view of the invention at location C of FIG. 2;
FIG. 5 is a partial cross-sectional view of the overall structure of the under-ring oil supply lubrication device of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5 in accordance with the present invention;
fig. 7 is a cross-sectional view of a bearing of the present invention.
The reference numerals in the figures denote: 10-radial oil collecting ring, 20-main shaft, 30-bearing, 40-bearing seat and 50-oil supply nozzle;
11-left cylindrical wall, 12-left annular baffle wall, 13-oil collecting blade, 14-right annular baffle wall, 15-right cylindrical wall, 16-oil collecting groove, 17-oil collecting inlet, 18-oil conveying groove, 19-oil baffle blade;
131-blade tip, 132-blade root, 133-oil distributing boss, 134-blade tip baffle and 135-oil collecting blade inner groove;
191-tip, 192-root;
31-bearing inner ring, 32-bearing outer ring, 33-cage, 34-roller;
311-axial oil conveying groove, 312-circumferential oil groove and 313-radial oil hole.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
as shown in fig. 1 to 4, the present embodiment provides a radial oil-receiving ring including, in order from left to right: a left cylindrical wall 11, a left annular baffle wall 12, an oil collecting blade 13, a right annular baffle wall 14 and a right cylindrical wall 15; the left cylindrical wall 11, the left annular blocking wall 12, the right annular blocking wall 14 and the right cylindrical wall 15 are coaxially and oppositely arranged, the planes of the left annular blocking wall 12 and the right annular blocking wall 14 are perpendicular to the axes of the left cylindrical wall 11 and the right cylindrical wall 15, the left annular blocking wall 12 is arranged at the edge of one end of the left cylindrical wall 11, and the right annular blocking wall 14 is arranged at the edge of one end of the right cylindrical wall 15; a plurality of oil collecting vanes 13 which are circumferentially arranged are arranged between the left annular retaining wall 12 and the right annular retaining wall 14, and an oil collecting groove 16 is defined by the left annular retaining wall 12, the right annular retaining wall 14 and the oil collecting vanes 13; one end of the oil collecting blade 13 is a blade tip 131, the other end is a blade root 132, and the groove depth of the oil collecting groove 16 from the blade tip 131 to the blade root 132 is gradually increased; the blade tip 131 of each oil collecting blade 13 is adjacent to but not in contact with the blade root 132 of the previous oil collecting blade 13 so as to form a through oil collecting inlet 17 below the blade tip 131; the inner walls of the left cylindrical wall 11 and the right cylindrical wall 15 are provided with oil conveying grooves 18 which are along the axial direction and communicated with the oil receiving inlet 17, the oil conveying grooves 18 in the left cylindrical wall 11 are uniformly distributed along the circumferential direction of the left cylindrical wall 11, and the oil conveying grooves 18 in the right cylindrical wall 15 are uniformly distributed along the circumferential direction of the right cylindrical wall 15.
The oil collecting blade 13 at the inner opening of the oil collecting inlet 17 is provided with an oil separating boss 133, the proportion of the lubricating oil flowing to the bearings at two sides is controlled by adjusting the axial position of the highest point of the oil separating boss 133 on the inner surface of the oil collecting blade 13, and meanwhile, the oil separating boss 133 can reduce the throwing amount of the lubricating oil after entering the radial oil collecting ring.
An oil blocking blade 19 is arranged between two adjacent oil receiving blades 13, each oil blocking blade 19 is circumferentially arranged along the oil receiving blade 13, two ends of each oil blocking blade 19 are a tip portion 191 and a root portion 192, the root portion 192 of each oil blocking blade 19 is adjacent to the blade root 132, the tip portion 191 of each oil blocking blade 19 extends upwards to be close to the blade tip 131 of each oil receiving blade 13, an oil blocking space can be formed between the tip portion 191 of each oil blocking blade 19 and the main shaft, and lubricating oil reflected and splashed by the inner surface of each oil receiving blade can be prevented from being thrown outwards along the oil receiving inlet 17.
An oil collecting blade inner groove 135 is formed from the top of the blade tip 131 of the oil collecting blade 13 to the middle rear part of the oil collecting blade 13, and the lubricating oil entering along the oil collecting blade inner groove 135 and the oil collecting inlet 17 is converged at the blade root 132 of the oil collecting blade 13 and then flows to the oil conveying grooves 18 on the two sides respectively.
The blade tip 131 is provided with a blade tip baffle 134 with a certain width perpendicular to the surface of the blade tip 131, and the width of the blade tip baffle 134 perpendicular to the surface of the blade tip 131 is determined according to the rotating speed of the radial oil receiving ring and the oil supply amount of the lubricating oil.
The plurality of oil collecting vanes 13 are evenly arranged along the circumference.
Example 2:
as shown in fig. 1 to 7, the present embodiment provides an under-ring lubrication device for an aircraft engine bearing, including the radial oil-collecting ring 10 in embodiment 1, further including: the main shaft 20, two bearings 30 sleeved on the main shaft 20, a bearing seat 40 sleeved outside the bearings 30 and an oil supply nozzle 50 arranged on the bearing seat 40 and connected with an oil supply way; the oil supply nozzle 50 penetrates into the bearing seat 40 and is aligned with the oil receiving groove 16; the radial oil-collecting ring 10 is sleeved on the main shaft 20 and can synchronously rotate with the main shaft 20, and two ends of the radial oil-collecting ring 10 are respectively clung to the end parts of the bearings 30.
The bearing 30 includes a bearing inner ring 31 that contacts the main shaft 20, a bearing outer ring 32, and rollers 34 that are held by a retainer 33 and are provided between the bearing inner ring 31 and the bearing outer ring 32.
A plurality of axial oil conveying grooves 311 which are uniformly distributed along the circumferential direction and are in one-to-one butt joint with the oil conveying grooves 18 are arranged on the inner wall of the bearing inner ring 31, circumferential oil grooves 312 which are arranged along the circumferential direction and are communicated with the axial oil conveying grooves 311 are further arranged on the inner wall of the bearing inner ring 31, and radial oil holes 313 which penetrate through the bearing 30 are arranged on the circumferential oil grooves 312; the oil feed groove 18 and the circumferential oil groove 312 are located on both sides of the axial oil feed groove 311.
Example 3:
the embodiment provides an under-ring lubrication method for an aeroengine bearing, which is implemented by using the device in embodiment 2, and specifically comprises the following steps:
the lubricating oil is sprayed out at a certain speed through the oil supply nozzle and flows to an oil receiving inlet of the radial oil receiving ring, the radial oil receiving ring rotates at a high speed to cut lubricating oil jet flow, the lubricating oil flows inwards along the inner surface of the oil receiving blade, the lubricating oil is distributed through the oil distribution boss and then flows to oil transmission grooves on two sides, and meanwhile, the lubricating oil continues to flow to the blade root of the oil receiving blade along the inner surface of the oil receiving blade; when the radial oil collecting ring rotates at a high speed, the airflow speed and the pressure at the foremost end of the oil collecting blade tip are highest, a shielding area is formed at the middle rear part of the blade tip along the circumferential direction, the airflow speed and the pressure are both greatly reduced compared with the front end of the blade tip, after the groove is formed, lubricating oil enters from the top of the blade tip of the oil collecting blade and flows to the blade root of the oil collecting blade along an internal groove of the oil collecting blade, and the lubricating oil is converged at the blade root of the oil collecting blade along the internal surface of the oil collecting blade at an oil collecting inlet and then flows to oil conveying grooves at two sides of the radial oil collecting ring;
the lubricating oil entering the radial oil receiving ring oil conveying groove continuously flows to the axial oil conveying groove on the bearing inner ring and then flows to the radial oil hole of the bearing inner ring, and the lubricating oil is thrown into the bearing along the radial oil hole under the action of centrifugal force to lubricate and cool each component of the bearing.
For convenient installation, the circumferential width of the radial oil receiving ring oil conveying groove is larger than that of the axial oil conveying groove on the bearing inner ring; when the lubricating oil enters the oil receiving inlet and flows along the oil receiving blade, part of the lubricating oil entering the radial oil receiving ring under the action of high-speed rotating centrifugal force can cross the oil distribution boss and be thrown out along the surface of the oil receiving blade, when the lubricating oil flows to the blade tip baffle, the lubricating oil enters the oil receiving ring again after the flowing direction is changed along the inner surface of the blade tip baffle, and the blade tip baffle of the oil receiving blade can effectively prevent the lubricating oil from being thrown out of the oil receiving channel; the oil jet entering the radial oil-collecting ring along the oil-collecting inlet has very obvious reflection and splashing phenomena when impacting the inner surface of the oil-collecting blade, part of the reflected and splashed oil enters an oil-blocking space formed by the oil-blocking blade and the main shaft, the flow speed of the part of the oil is far lower than the tangential speed of the radial oil-collecting ring at the radius position, and the part of the oil flows to the inside of the radial oil-collecting ring along the inner surface of the oil-collecting blade again along with the rotation of the radial oil-collecting ring.
Claims (8)
1. The utility model provides a radial oil collecting ring which characterized in that includes that from left to right sets gradually: a left cylindrical wall (11), a left annular baffle wall (12), an oil collecting blade (13), a right annular baffle wall (14) and a right cylindrical wall (15); the left cylindrical wall (11), the left annular blocking wall (12), the right annular blocking wall (14) and the right cylindrical wall (15) are coaxially and oppositely arranged, the planes of the left annular blocking wall (12) and the right annular blocking wall (14) are perpendicular to the axes of the left cylindrical wall (11) and the right cylindrical wall (15), the left annular blocking wall (12) is arranged at the edge of one end of the left cylindrical wall (11), and the right annular blocking wall (14) is arranged at the edge of one end of the right cylindrical wall (15);
a plurality of oil collecting blades (13) which are circumferentially arranged are arranged between the left annular retaining wall (12) and the right annular retaining wall (14), and an oil collecting groove (16) is defined by the left annular retaining wall (12), the right annular retaining wall (14) and the oil collecting blades (13); one end of the oil collecting blade (13) is a blade tip (131), the other end of the oil collecting blade is a blade root (132), and the groove depth of the oil collecting groove (16) from the blade tip (131) to the blade root (132) is gradually increased; the blade tip (131) of each oil collecting blade (13) is adjacent to but not in contact with the blade root (132) of the previous oil collecting blade (13) so as to form a through oil collecting inlet (17) below the blade tip (131);
the inner walls of the left cylindrical wall (11) and the right cylindrical wall (15) are respectively provided with an oil conveying groove (18) which is axial and communicated with the oil receiving inlet (17), the oil conveying grooves (18) in the left cylindrical wall (11) are uniformly distributed along the circumferential direction of the left cylindrical wall (11), and the oil conveying grooves (18) in the right cylindrical wall (15) are uniformly distributed along the circumferential direction of the right cylindrical wall (15);
an oil collecting lug boss (133) is arranged on an oil collecting blade (13) at the inner opening of the oil collecting inlet (17);
be equipped with between two adjacent oil receiving blades (13) and keep off oil blade (19), each oil retaining blade (19) is arranged along oil receiving blade (13) place circumference, and the both ends of keeping off oil blade (19) are most portion (191) and root (192) respectively, the root (192) of keeping off oil blade (19) with blade root (132) are adjacent, and the most portion (191) of keeping off oil blade (19) upwards extend to apex (131) that are close to oil receiving blade (13).
2. The radial oil collecting ring as set forth in claim 1, wherein an oil collecting vane inside groove (135) is formed from the top of the blade tip (131) of the oil collecting vane (13) to the middle rear part of the oil collecting vane (13), and the lubricating oil entering along the oil collecting vane inside groove (135) and the oil collecting inlet (17) is converged at the blade root (132) of the oil collecting vane (13) and then flows to the oil delivery grooves (18) at both sides.
3. The radial oil control ring according to claim 1, characterized in that the blade tip (131) is provided with a blade tip flap (134) perpendicular to the surface of the blade tip (131).
4. The radial oil recovery ring as set forth in claim 1 wherein the plurality of oil recovery vanes (13) are circumferentially uniformly arranged.
5. An under-ring lubrication device for an aircraft engine bearing, comprising a radial oil-collecting ring (10) according to any one of claims 1 to 4, and further comprising: the device comprises a main shaft (20), two bearings (30) sleeved on the main shaft (20), a bearing seat (40) sleeved outside the bearings (30) and an oil supply nozzle (50) arranged on the bearing seat (40) and connected with an oil supply way; the oil supply nozzle (50) penetrates into the bearing seat (40) and is aligned with the oil receiving groove (16);
the radial oil collecting ring (10) is sleeved on the main shaft (20) and can synchronously rotate with the main shaft (20), and two ends of the radial oil collecting ring (10) are respectively clung to the end parts of the bearings (30).
6. The under-ring lubrication device for an aircraft engine bearing according to claim 5, characterized in that the bearing (30) comprises an inner bearing ring (31) in contact with the main shaft (20), an outer bearing ring (32) and rollers (34) held by a cage (33) provided between the inner bearing ring (31) and the outer bearing ring (32).
7. The under-ring lubrication device for an aircraft engine bearing according to claim 6, wherein the inner wall of the bearing inner ring (31) is provided with a plurality of axial oil-conveying grooves (311) which are uniformly distributed along the circumferential direction and are in one-to-one butt joint with the oil-conveying grooves (18), the inner wall of the bearing inner ring (31) is also provided with circumferential oil grooves (312) which are arranged along the circumferential direction and are communicated with the axial oil-conveying grooves (311), and the circumferential oil grooves (312) are provided with radial oil holes (313) which penetrate into the bearing (30); the oil conveying groove (18) and the circumferential oil groove (312) are positioned on two sides of the axial oil conveying groove (311).
8. A method for under-ring lubrication of an aircraft engine bearing, the method being implemented using the apparatus of any one of claims 5 to 7, and comprising the steps of:
the lubricating oil is sprayed out at a certain speed through the oil supply nozzle and flows to an oil receiving inlet of the radial oil receiving ring, the radial oil receiving ring rotates at a high speed to cut lubricating oil jet flow, the lubricating oil flows inwards along the inner surface of the oil receiving blade, the lubricating oil is distributed through the oil distribution boss and then flows to oil transmission grooves on two sides, and meanwhile, the lubricating oil continues to flow to the blade root of the oil receiving blade along the inner surface of the oil receiving blade; when the radial oil collecting ring rotates at a high speed, the airflow speed and the pressure at the foremost end of the oil collecting blade tip are highest, a shielding area is formed at the middle rear part of the blade tip along the circumferential direction, the airflow speed and the pressure are both greatly reduced compared with the front end of the blade tip, after the groove is formed, lubricating oil enters from the top of the blade tip of the oil collecting blade and flows to the blade root of the oil collecting blade along an internal groove of the oil collecting blade, and the lubricating oil is converged at the blade root of the oil collecting blade along the internal surface of the oil collecting blade at an oil collecting inlet and then flows to oil conveying grooves at two sides of the radial oil collecting ring;
the lubricating oil entering the radial oil receiving ring oil conveying groove continuously flows to the axial oil conveying groove on the bearing inner ring and then flows to the radial oil hole of the bearing inner ring, and the lubricating oil is thrown into the bearing along the radial oil hole under the action of centrifugal force to lubricate and cool each component of the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2011241894A (en) * | 2010-05-18 | 2011-12-01 | Jtekt Corp | Split rolling bearing, and bearing device with the same |
| JP2012021581A (en) * | 2010-07-14 | 2012-02-02 | Jtekt Corp | Oil-air lubrication type rolling bearing device |
| CN204900542U (en) * | 2015-06-04 | 2015-12-23 | 中航商用航空发动机有限责任公司 | Oil ring is radially received to main shaft bearing and impeller formula for aviation |
| CN105370734A (en) * | 2014-08-29 | 2016-03-02 | 中航商用航空发动机有限责任公司 | Bearing and inner ring thereof |
| CN109139708A (en) * | 2017-06-15 | 2019-01-04 | 西门子公司 | Bearing lubrication structure and motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012222752A1 (en) * | 2012-12-11 | 2014-06-12 | Mahle International Gmbh | bearing arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011241894A (en) * | 2010-05-18 | 2011-12-01 | Jtekt Corp | Split rolling bearing, and bearing device with the same |
| JP2012021581A (en) * | 2010-07-14 | 2012-02-02 | Jtekt Corp | Oil-air lubrication type rolling bearing device |
| CN105370734A (en) * | 2014-08-29 | 2016-03-02 | 中航商用航空发动机有限责任公司 | Bearing and inner ring thereof |
| CN204900542U (en) * | 2015-06-04 | 2015-12-23 | 中航商用航空发动机有限责任公司 | Oil ring is radially received to main shaft bearing and impeller formula for aviation |
| CN109139708A (en) * | 2017-06-15 | 2019-01-04 | 西门子公司 | Bearing lubrication structure and motor |
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