CN104384822B - A kind of bearing spacer matching method - Google Patents
A kind of bearing spacer matching method Download PDFInfo
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- CN104384822B CN104384822B CN201410640127.XA CN201410640127A CN104384822B CN 104384822 B CN104384822 B CN 104384822B CN 201410640127 A CN201410640127 A CN 201410640127A CN 104384822 B CN104384822 B CN 104384822B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/003—Measuring of motor parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
- Rolling Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
A kind of bearing spacer matching method, belongs to bearing applied technical field, particularly relates to a kind of bearing spacer matching method being applied in aero-engine.The present invention provides the bearing spacer matching method of a kind of safety that can effectively ensure that correctness that internal space ring and external space ring matches and electromotor work.A kind of bearing spacer matching method, comprises the steps: step one: adopt the radially movable tool that measures to measure the radially movable amount of bearing；Step 2: adopt axial mobility to measure measurement axis concave convexity；Step 3: determine bearing axial mobility；Step 4: apolegamy bearing outer ring spacer, matches the other outer ring spacer of respective sets according to the thickness H of the above-mentioned bearing outer ring spacer determined；The outer ring spacer matched uniformly is chosen some its thickness of measurement, takes its arithmetic mean of instantaneous value actual (real) thickness H ＇ as outer ring spacer；Step 5: apolegamy bearing inner spacer, matches the other cone spacer of respective sets according to the thickness C of the above-mentioned bearing inner spacer determined.
Description
Technical field
The invention belongs to bearing applied technical field, particularly relate to a kind of bearing spacer matching method being applied in aero-engine.
Background technology
The design of same fulcrum duplex bearing frequently appears in electromotor design, and when ensureing electromotor work by internal space ring and external space ring, the axial force of its generation uniformly shared by duplex bearing, and only in this way, electromotor could steady operation.Therefore, how accurately apolegamy internal space ring and external space ring is particularly important.
Additionally, aero-engine is when carrying out final assembly, the free activity of bearing be there are certain requirements, thus before engine assembly, needing to check the axle under bearing free state, radially movable amount, the accuracy guarantee that only guaranteed free state lower bearing activity is measured starts the work that function is stable.
At present, existing bearing spacer matching method is matched each through Theoretical Calculation, it is impossible to ensure the accuracy of internal space ring and external space ring apolegamy.
Summary of the invention
For prior art Problems existing, the present invention provides the bearing spacer matching method of a kind of safety that can effectively ensure that correctness that internal space ring and external space ring matches and electromotor work.
To achieve these goals, the present invention adopts the following technical scheme that, a kind of bearing spacer matching method, comprises the steps:
Step one: adopt the radially movable tool that measures to measure the radially movable amount of bearing,
Bearing is arranged on the radially movable clutch shaft bearing inner sleeve bearing measuring tool, with the first pressing plate, the first bolt and the first nut, bearing inner ring is fixed；Rise compactor and compress outer race, and measure the radially movable amount of bearing by the first amesdial；Uniformly set several along outer race circumference and measure point, measure each radially movable amount of bearing measuring point respectively；Take the minima of the radially movable amount of the bearing recorded and the meansigma methods of maximum as the radially movable amount of bearing；
Step 2: adopt axial mobility measuring tool measurement axis concave convexity,
Bearing is arranged on the second bearing inner sleeve bearing of axial mobility measuring tool, with the second pressing plate, the second bolt and the second nut, bearing inner ring is fixed；Put cover plate, make the lower end of cover plate contact with outer race；Two amesdials are separately fixed on its dial framework, and the gauge head of two dial frameworks is withstood on the upper and lower end face of outer race respectively；Start forcing press, by the force value set, cover plate applied pressure, and by amesdial measurement axis concave convexity；Uniformly set several along bearing inner ring circumference and measure point, measure each bearing camber measuring point respectively, and calculate its arithmetic mean of instantaneous value A1 is averageAnd B1 is average；Outer race is circumferentially revolved turnback, again measures and calculate A2 is averageAnd B2 is average；
Bearing concavity is determined by following formula:
A=(A1 is average+A2 is average)/2
In formula: bearing concavity when A-bearing faces up,
A1 is averageAn arithmetic mean of instantaneous value for bearing concavity is respectively measured when-bearing faces up,
A2 is averageEach arithmetic mean of instantaneous value measuring some bearing concavity after revolving turnback when-bearing faces up,
Bearing convexity is determined by following formula:
B=(B1 is average+B2 is average)/2
In formula: bearing convexity when B-bearing faces up,
B1 is averageAn arithmetic mean of instantaneous value for bearing convexity is respectively measured when-bearing faces up,
B2 is averageEach arithmetic mean of instantaneous value measuring some bearing convexity after revolving turnback when-bearing faces up,
Bearing is spun upside down, determines bearing concavity A ' and bearing convexity B ' when bearing is back side up as stated above；
Step 3: determine bearing axial mobility,
Measurement result according to step 2, it is determined that bearing axial mobility, bearing axial mobility is determined by following formula:
N=(A+B+A '+B ')/2
In formula: n-bearing axial mobility,
Bearing concavity when A-bearing faces up,
Bearing convexity when B-bearing faces up,
Bearing concavity when A '-bearing is back side up,
Bearing convexity when B '-bearing is back side up,
Step 4: apolegamy bearing outer ring spacer,
Measurement axis bearing end face to the distance d of bottom surface, is measured casing and is installed the limit end face distance e to convex shoulder, measure a set of in outer race width a1 and the b1 of two bearings, determine the thickness H of bearing outer ring spacer by following formula:
H=d-e-a1-b1-0.1
In formula: the thickness of H-bearing outer ring spacer,
The outer race width of two bearings during a1, b1-are a set of,
D-bearing block end face to the distance of bottom surface,
E-casing installs the limit end face distance to convex shoulder,
Average bearing clearance between 0.1-bearing face and casing；
Thickness H according to the above-mentioned bearing outer ring spacer determined matches the other outer ring spacer of respective sets；
The outer ring spacer matched uniformly is chosen some its thickness of measurement, takes its arithmetic mean of instantaneous value actual (real) thickness H ' as outer ring spacer；
Step 5: apolegamy bearing inner spacer,
The thickness c of bearing inner spacer is determined by following formula:
C=H '+A-B
In formula: the thickness of C-bearing inner spacer,
The actual (real) thickness of H '-outer ring spacer,
Bearing concavity when A-bearing faces up,
Bearing convexity when B-bearing faces up,
Thickness c according to the above-mentioned bearing inner spacer determined matches the other cone spacer of respective sets.
Radially movable measurement described in step one has, and including the bearing with the first through hole, arranges the clutch shaft bearing inner sleeve bearing with central through hole, be provided with bearing erecting bed on clutch shaft bearing inner sleeve bearing on the vertical direction of bearing；First pressing plate with the second through hole is set in the side of clutch shaft bearing inner sleeve bearing, after the second through hole of first screw bolt passes the first pressing plate, the central through hole of clutch shaft bearing inner sleeve bearing and the first through hole of bearing, is connected with the first nut；Being provided above the first amesdial at clutch shaft bearing inner sleeve bearing, the first amesdial is fixed on the first dial framework, and the first dial framework is fixed on bearing；It is arranged below compactor at clutch shaft bearing inner sleeve bearing.
Axial mobility measuring tool described in step 2, including the second bearing inner sleeve bearing being arranged on jig platform, second bearing inner sleeve bearing has central through hole, second bearing inner sleeve bearing is provided with bearing erecting bed, at second pressing plate being provided above there is third through-hole of the second bearing inner sleeve bearing；The lower end of the second bolt is fixed in the central through hole of the second bearing inner sleeve bearing, and upper end is connected with the second nut after the third through-hole of the second pressing plate；It is provided above cover plate at the second pressing plate, the jig platform of the second bearing inner sleeve bearing side is respectively provided with second dial framework and the 3rd dial framework with side head, the second dial framework is fixed with the second amesdial, the 3rd dial framework is fixed with the 3rd amesdial.
Be provided with hole, location in the center of described cover plate, hole, described location is corresponding with the upper end of the second bolt.
Beneficial effects of the present invention:
The bearing spacer matching method of the present invention can effectively ensure that the correctness that internal space ring and external space ring is matched, and then ensure electromotor operationally, duplex bearing can bear suitable axial force simultaneously, reduces situation about damaging because single shaft strength is uneven and occurs, has been effectively ensured the safety of electromotor work.
Radially movable measurement of the present invention has and axial mobility measuring tool, it is ensured that the accuracy that free state lower bearing footpath, axial mobility are measured, and then ensure that the correctness that internal space ring and external space ring is matched.
Accompanying drawing explanation
Fig. 1 is the radially movable structural representation measuring tool of the present invention；
Fig. 2 is the structural representation of axial mobility measuring tool of the present invention；
Fig. 3 is the structural representation after bearing, bearing block, casing and internal space ring and external space ring assembling；
In figure: 1-bolt, 2-bearing, 3-clutch shaft bearing inner sleeve bearing, 4-the first nut, 5-pad, 6-the first dial framework, 7-the first amesdial, 8-outer race, 9-bearing inner ring, 10-the first bolt, 11-the first pressing plate, 12-compactor, 13-the 3rd amesdial, 14-cover plate, 15-forcing press, 16-the second nut, 17-the second pressing plate, 18-the second amesdial, 19-the second dial framework, 20-the second bolt, 21-the second bearing inner sleeve, 22-jig platform, 23-bearing block, 24-outer ring spacer, 25-cone spacer, 26-clutch shaft bearing, 27-the second bearing, 28-casing, 29-the 3rd dial framework.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
A kind of bearing spacer matching method, comprises the steps:
Step one: adopt the radially movable tool that measures to measure the radially movable amount of bearing, as it is shown in figure 1,
Bearing is arranged on the radially movable clutch shaft bearing inner sleeve bearing 3 measuring tool, with first pressing plate the 11, first bolt 10 and the first nut 4, bearing inner ring 9 is fixed；Rise compactor 12 and compress outer race 8, and measure the radially movable amount of bearing by the first amesdial 7；Uniformly set three along outer race 8 circumference and measure point (choosing a place every 120 degree), measure each radially movable amount of bearing measuring point respectively；Take the minima of the radially movable amount of the bearing recorded and the meansigma methods of maximum as the radially movable amount of bearing；
Step 2: adopt axial mobility measuring tool measurement axis concave convexity, as in figure 2 it is shown,
Bearing is arranged on the second bearing inner sleeve bearing 21 of axial mobility measuring tool, with second pressing plate the 17, second bolt 20 and the second nut 16, bearing inner ring 9 is fixed；Put cover plate 14, make the lower end of cover plate 14 contact with outer race 8；Second amesdial 18 is fixed on the second dial framework 19, the 3rd amesdial 13 is fixed on the 3rd dial framework 29, and the gauge head of two dial frameworks is withstood on the upper and lower end face of outer race 8 respectively；Start forcing press 15, by the force value set, cover plate 14 applied pressure, and by amesdial measurement axis concave convexity；Uniformly set four along bearing inner ring 9 circumference and measure point, measure each bearing camber measuring point respectively, and calculate its arithmetic mean of instantaneous value A1 is averageAnd B1 is average；Outer race 8 is circumferentially revolved turnback, again measures and calculate A2 is averageAnd B2 is average；
Bearing concavity is determined by following formula:
A=(A1 is average+A2 is average)/2
In formula: bearing concavity when A-bearing faces up,
A1 is averageAn arithmetic mean of instantaneous value for bearing concavity is respectively measured when-bearing faces up,
A2 is averageEach arithmetic mean of instantaneous value measuring some bearing concavity after revolving turnback when-bearing faces up,
Bearing convexity is determined by following formula:
B=(B1 is average+B2 is average)/2
In formula: bearing convexity when B-bearing faces up,
B1 is averageAn arithmetic mean of instantaneous value for bearing convexity is respectively measured when-bearing faces up,
B2 is averageEach arithmetic mean of instantaneous value measuring some bearing convexity after revolving turnback when-bearing faces up,
Bearing is spun upside down, determines bearing concavity A ' and bearing convexity B ' when bearing is back side up as stated above；
Step 3: determine bearing axial mobility,
Measurement result according to step 2, it is determined that bearing axial mobility, bearing axial mobility is determined by following formula:
N=(A+B+A '+B ')/2
In formula: n-bearing axial mobility,
Bearing concavity when A-bearing faces up,
Bearing convexity when B-bearing faces up,
Bearing concavity when A '-bearing is back side up,
Bearing convexity when B '-bearing is back side up,
Step 4: apolegamy bearing outer ring spacer 24, as it is shown on figure 3,
Measurement axis bearing 23 end face is to the distance d of bottom surface, measure casing 28 and the end face distance e to convex shoulder in limit is installed, measure a set of in outer race width a1 and the b1 of two bearings (i.e. clutch shaft bearing 26 and the second bearing 27), determine the thickness H of bearing outer ring spacer by following formula:
H=d-e-a1-b1-0.1
In formula: the thickness of H-bearing outer ring spacer,
The outer race width of two bearings during a1, b1-are a set of,
D-bearing block end face to the distance of bottom surface,
E-casing installs the limit end face distance to convex shoulder,
Average bearing clearance between 0.1-bearing face and casing；
Thickness H according to the above-mentioned bearing outer ring spacer determined matches the other outer ring spacer of respective sets；
The outer ring spacer matched uniformly is chosen 4 and measures its thickness, take its arithmetic mean of instantaneous value actual (real) thickness H ' as outer ring spacer；
Step 5: apolegamy bearing inner spacer 25,
The thickness c of bearing inner spacer is determined by following formula:
C=H '+A-B
In formula: the thickness of C-bearing inner spacer,
The actual (real) thickness of H '-outer ring spacer,
Bearing concavity when A-bearing faces up,
Bearing convexity when B-bearing faces up,
Thickness c according to the above-mentioned bearing inner spacer determined matches the other cone spacer of respective sets.
As it is shown in figure 1, radially movable measurement the described in step one has, including the bearing 2 with the first through hole, the vertical direction of bearing 2 arranges the clutch shaft bearing inner sleeve bearing 3 with central through hole, clutch shaft bearing inner sleeve bearing 3 is provided with bearing erecting bed；Arrange first pressing plate 11 with the second through hole in the side of clutch shaft bearing inner sleeve bearing 3, the first bolt 10 is connected with the first nut 4 after sequentially passing through the second through hole of the first pressing plate 11, the central through hole of clutch shaft bearing inner sleeve bearing 3 and the first through hole of bearing 2；Being provided above the first amesdial 7 at clutch shaft bearing inner sleeve bearing 3, the first amesdial 7 is fixed on the first dial framework 6, and the first dial framework 6 is fixed on bearing 2；It is arranged below compactor 12 at clutch shaft bearing inner sleeve bearing 3.During use, bearing 2 is fixed on fixed mount by bolt 1；The first bolt 10 between bearing 2 and the first nut 4 is provided with pad 5.
As shown in Figure 2, axial mobility measuring tool described in step 2, including the second bearing inner sleeve bearing 21 being arranged on jig platform 22, second bearing inner sleeve bearing 21 has central through hole, second bearing inner sleeve bearing 21 is provided with bearing erecting bed, at second pressing plate 17 being provided above there is third through-hole of the second bearing inner sleeve bearing 21；The lower end of the second bolt 20 is fixed in the central through hole of the second bearing inner sleeve bearing 21, and upper end is connected with the second nut 16 after the third through-hole of the second pressing plate 17；It is provided above cover plate 14 at the second pressing plate 17, the jig platform 22 of the second bearing inner sleeve bearing 21 side is respectively provided with second dial framework 19 and the 3rd dial framework 29 with side head, second dial framework 19 is fixed with the second amesdial 18, the 3rd dial framework 29 is fixed with the 3rd amesdial 13.
Be provided with hole, location in the center of described cover plate 14, hole, described location is corresponding with the upper end of the second bolt 20.
Claims (4)
1. a bearing spacer matching method, it is characterised in that comprise the steps:
Step one: adopt the radially movable tool that measures to measure the radially movable amount of bearing,
Bearing is arranged on the radially movable clutch shaft bearing inner sleeve bearing measuring tool, with the first pressing plate, the first bolt and the first nut, bearing inner ring is fixed；Rise compactor and compress outer race, and measure the radially movable amount of bearing by the first amesdial；Uniformly set several along outer race circumference and measure point, measure each radially movable amount of bearing measuring point respectively；Take the minima of the radially movable amount of the bearing recorded and the meansigma methods of maximum as the radially movable amount of bearing；
Step 2: adopt axial mobility measuring tool measurement axis concave convexity,
Bearing is arranged on the second bearing inner sleeve bearing of axial mobility measuring tool, with the second pressing plate, the second bolt and the second nut, bearing inner ring is fixed；Put cover plate, make the lower end of cover plate contact with outer race；Two amesdials are separately fixed on its dial framework, and the gauge head of two dial frameworks is withstood on the upper and lower end face of outer race respectively；Start forcing press, by the force value set, cover plate applied pressure, and by amesdial measurement axis concave convexity；Uniformly set several along bearing inner ring circumference and measure point, measure each bearing camber measuring point respectively, and calculate its arithmetic mean of instantaneous value A1 is averageAnd B1 is average；Outer race is circumferentially revolved turnback, again measures and calculate A2 is averageAnd B2 is average；
Bearing concavity is determined by following formula:
A=(A1 is average+A2 is average)/2
In formula: bearing concavity when A-bearing faces up,
A1 is averageAn arithmetic mean of instantaneous value for bearing concavity is respectively measured when-bearing faces up,
A2 is averageEach arithmetic mean of instantaneous value measuring some bearing concavity after revolving turnback when-bearing faces up,
Bearing convexity is determined by following formula:
B=(B1 is average+B2 is average)/2
In formula: bearing convexity when B-bearing faces up,
B1 is averageAn arithmetic mean of instantaneous value for bearing convexity is respectively measured when-bearing faces up,
B2 is averageEach arithmetic mean of instantaneous value measuring some bearing convexity after revolving turnback when-bearing faces up,
Bearing is spun upside down, determines bearing concavity A ' and bearing convexity B ' when bearing is back side up as stated above；
Step 3: determine bearing axial mobility,
Measurement result according to step 2, it is determined that bearing axial mobility, bearing axial mobility is determined by following formula:
N=(A+B+A '+B ')/2
In formula: n-bearing axial mobility,
Bearing concavity when A-bearing faces up,
Bearing convexity when B-bearing faces up,
Bearing concavity when A '-bearing is back side up,
Bearing convexity when B '-bearing is back side up,
Step 4: apolegamy bearing outer ring spacer,
Measurement axis bearing end face to the distance d of bottom surface, is measured casing and is installed the limit end face distance e to convex shoulder, measure a set of in outer race width a1 and the b1 of two bearings, determine the thickness H of bearing outer ring spacer by following formula:
H=d-e-a1-b1-0.1
In formula: the thickness of H-bearing outer ring spacer,
The outer race width of two bearings during a1, b1-are a set of,
D-bearing block end face to the distance of bottom surface,
E-casing installs the limit end face distance to convex shoulder,
Average bearing clearance between 0.1-bearing face and casing；
Thickness H according to the above-mentioned bearing outer ring spacer determined matches the other outer ring spacer of respective sets；
The outer ring spacer matched uniformly is chosen some its thickness of measurement, takes its arithmetic mean of instantaneous value actual (real) thickness H ' as outer ring spacer；
Step 5: apolegamy bearing inner spacer,
The thickness C of bearing inner spacer is determined by following formula:
C=H '+A-B
In formula: the thickness of C-bearing inner spacer,
The actual (real) thickness of H '-outer ring spacer,
Bearing concavity when A-bearing faces up,
Bearing convexity when B-bearing faces up,
Thickness C according to the above-mentioned bearing inner spacer determined matches the other cone spacer of respective sets.
2. radially movable measurement that the bearing spacer matching method described in claim 1 adopts has, it is characterized in that, including the bearing with the first through hole, the vertical direction of bearing arranges the clutch shaft bearing inner sleeve bearing with central through hole, clutch shaft bearing inner sleeve bearing is provided with bearing erecting bed；First pressing plate with the second through hole is set in the side of clutch shaft bearing inner sleeve bearing, after the second through hole of first screw bolt passes the first pressing plate, the central through hole of clutch shaft bearing inner sleeve bearing and the first through hole of bearing, is connected with the first nut；Being provided above the first amesdial at clutch shaft bearing inner sleeve bearing, the first amesdial is fixed on the first dial framework, and the first dial framework is fixed on bearing；It is arranged below compactor at clutch shaft bearing inner sleeve bearing.
3. the axial mobility measuring tool that the bearing spacer matching method described in claim 1 adopts, it is characterized in that, including the second bearing inner sleeve bearing being arranged on jig platform, second bearing inner sleeve bearing has central through hole, second bearing inner sleeve bearing is provided with bearing erecting bed, at second pressing plate being provided above there is third through-hole of the second bearing inner sleeve bearing；The lower end of the second bolt is fixed in the central through hole of the second bearing inner sleeve bearing, and upper end is connected with the second nut after the third through-hole of the second pressing plate；It is provided above cover plate at the second pressing plate, the jig platform of the second bearing inner sleeve bearing side is respectively provided with second dial framework and the 3rd dial framework with side head, the second dial framework is fixed with the second amesdial, the 3rd dial framework is fixed with the 3rd amesdial.
4. the axial mobility measuring tool that bearing spacer matching method according to claim 3 adopts, it is characterised in that be provided with hole, location in the center of the cover plate of described axial mobility measuring tool, hole, described location is corresponding with the upper end of the second bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640127.XA CN104384822B (en) | 2014-11-13 | 2014-11-13 | A kind of bearing spacer matching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640127.XA CN104384822B (en) | 2014-11-13 | 2014-11-13 | A kind of bearing spacer matching method |
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| CN104384822A CN104384822A (en) | 2015-03-04 |
| CN104384822B true CN104384822B (en) | 2016-07-20 |
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| CN105698659B (en) * | 2016-04-22 | 2018-11-27 | 贵州黎阳航空动力有限公司 | A kind of engine middle (center) bearing cycle surface camber measuring device |
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|---|---|---|---|---|
| CN202468700U (en) * | 2011-11-10 | 2012-10-03 | 日本精工株式会社 | Multi-row rolling bearing |
| CN202614158U (en) * | 2012-05-10 | 2012-12-19 | 广东韶钢松山股份有限公司 | Device for measuring bearing axial clearance |
| CN203395009U (en) * | 2013-07-12 | 2014-01-15 | 浙江正大轴承有限公司 | Double-row bearing with novel inner ring |
| JP2014132186A (en) * | 2013-01-07 | 2014-07-17 | Jtekt Corp | Bearing device |
-
2014
- 2014-11-13 CN CN201410640127.XA patent/CN104384822B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202468700U (en) * | 2011-11-10 | 2012-10-03 | 日本精工株式会社 | Multi-row rolling bearing |
| CN202614158U (en) * | 2012-05-10 | 2012-12-19 | 广东韶钢松山股份有限公司 | Device for measuring bearing axial clearance |
| JP2014132186A (en) * | 2013-01-07 | 2014-07-17 | Jtekt Corp | Bearing device |
| CN203395009U (en) * | 2013-07-12 | 2014-01-15 | 浙江正大轴承有限公司 | Double-row bearing with novel inner ring |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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