CN105864279B - Dynamic pressure bearing and processing method thereof - Google Patents
Dynamic pressure bearing and processing method thereof Download PDFInfo
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- CN105864279B CN105864279B CN201610404884.6A CN201610404884A CN105864279B CN 105864279 B CN105864279 B CN 105864279B CN 201610404884 A CN201610404884 A CN 201610404884A CN 105864279 B CN105864279 B CN 105864279B
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- dynamic pressure
- pressure bearing
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- bearing workpiece
- groove
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
- B22F3/162—Machining, working after consolidation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a method for processing a dynamic pressure bearing, which comprises the steps of 1) preparing raw material powder and mixing the raw material powder; 2) forming the raw material powder into a dynamic pressure bearing workpiece by adopting a die forming mode; 3) sintering the dynamic pressure bearing workpiece; 4) and filling and leveling the dynamic pressure groove on the inner surface of the dynamic pressure bearing workpiece at the position corresponding to the end part of the dynamic pressure bearing workpiece. The method can fill and level the position on the dynamic pressure groove corresponding to the end part of the dynamic pressure bearing, increase the pressure of the position on the lubricating oil, and promote the lubricating oil to flow to the middle of the dynamic pressure groove arranged on the dynamic pressure bearing, thereby reducing the risk of oil leakage and improving the safety of the dynamic pressure groove. The invention also provides a dynamic pressure bearing manufactured by the processing method, which comprises a middle section with a dynamic pressure groove and an end section with a smooth inner surface, and has small risk of oil leakage and high safety.
Description
Technical Field
The invention relates to the technical field of mechanical industry, in particular to a method for processing a dynamic pressure bearing and the dynamic pressure bearing.
Background
The hydrodynamic bearing is a sliding bearing in which a liquid film formed by the dynamic pressure of a liquid lubricant separates two friction surfaces and receives a load. The liquid lubricant is carried between the two friction surfaces by the relative motion of the two friction surfaces.
The dynamic pressure bearing is of a cylindrical structure and is directly matched with the rotating shaft when in application, and an oil film is formed between the outer surface of the rotating shaft and the inner surface of the dynamic pressure bearing and is used for supporting the rotating shaft to rotate in the dynamic pressure bearing. The inner surface of the dynamic pressure bearing is provided with dynamic pressure grooves, and the dynamic pressure grooves of the dynamic pressure bearing extend to two ends of the dynamic pressure bearing, so that oil leakage is easy to occur, and the safe operation of the dynamic pressure bearing is influenced.
In summary, how to avoid oil leakage from the dynamic pressure groove of the dynamic pressure bearing is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a method for machining a dynamic pressure bearing, which fills a position on a dynamic pressure groove corresponding to an end of the dynamic pressure bearing to increase pressure on lubricating oil at the position, so as to force the lubricating oil to flow to the position on the dynamic pressure bearing where the dynamic pressure groove is disposed, thereby reducing a risk of oil leakage and improving safety of the dynamic pressure bearing. The invention also provides a dynamic pressure bearing manufactured by the processing method, which comprises a middle section with a dynamic pressure groove and an end section with a smooth inner surface, and has small risk of oil leakage and high safety.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for machining a dynamic pressure bearing, comprising:
1) preparing raw material powder and mixing the raw material powder;
2) forming the raw material powder into a dynamic pressure bearing workpiece by adopting a die forming mode;
3) sintering the dynamic pressure bearing workpiece;
4) and filling and leveling the dynamic pressure groove on the inner surface of the dynamic pressure bearing workpiece at the position corresponding to the end part of the dynamic pressure bearing workpiece.
Preferably, in the method for machining a dynamic pressure bearing, the step 4) includes:
41) filling and leveling a position, corresponding to the first end of the dynamic pressure bearing workpiece, on a dynamic pressure groove on the inner surface of the dynamic pressure bearing, and finishing the dynamic pressure bearing;
42) and filling and leveling the position, corresponding to the second end of the dynamic pressure bearing workpiece, of the dynamic pressure groove on the inner surface of the dynamic pressure bearing, and finishing the dynamic pressure bearing.
Preferably, in the method of machining a dynamic pressure bearing, the step 41) and the step 42) are performed by pressing the raw material powder against a portion of the dynamic pressure groove to be leveled.
Preferably, in the method for machining a dynamic pressure bearing, the step 41) and the step 42) are performed by finishing the inner hole of the dynamic pressure bearing to a precision of μ level.
Preferably, in the method for processing a dynamic pressure bearing, the step 2) of molding the mold includes placing the raw material powder in a mold and performing extrusion molding.
Preferably, in the method for machining a dynamic pressure bearing, after the step 2), before the step 3), the method further includes:
23) and finishing the dynamic pressure bearing workpiece.
Preferably, the method of machining a dynamic pressure bearing further includes, after the step 4):
5) cleaning the dynamic pressure bearing workpiece, soaking the dynamic pressure bearing workpiece in oil, and packaging.
The dynamic pressure bearing is of a cylindrical structure, a dynamic pressure groove is formed in the inner wall of the middle section of the dynamic pressure bearing, and the inner wall of the end section of the dynamic pressure bearing is flat.
Preferably, in the dynamic pressure bearing, the dynamic pressure groove is provided in plurality, and each of the dynamic pressure grooves is parallel to an axial direction of the dynamic pressure bearing.
Preferably, in the above dynamic pressure bearing, the dynamic pressure grooves are uniformly distributed along a circumferential direction of the dynamic pressure bearing.
The invention provides a method for processing a dynamic pressure bearing, which comprises the following steps: 1) preparing raw material powder and mixing the raw material powder; 2) forming the raw material powder into a dynamic pressure bearing workpiece by adopting a die forming mode; 3) sintering the dynamic pressure bearing workpiece; 4) and filling and leveling the dynamic pressure groove on the inner surface of the dynamic pressure bearing workpiece at the position corresponding to the end part of the dynamic pressure bearing workpiece.
In the processing method, the position on the dynamic pressure groove on the inner surface of the dynamic pressure bearing, which corresponds to the end part of the dynamic pressure bearing, is filled, so that the pressure of the end part of the dynamic pressure bearing on the lubricating oil is large, the lubricating oil is enabled to flow to the middle section of the dynamic pressure groove arranged on the dynamic pressure bearing, the risk that the lubricating oil leaks from the dynamic pressure groove at the two ends of the dynamic pressure bearing is reduced, and the safety of the lubricating oil is improved.
The invention also provides a dynamic pressure bearing which is of a cylindrical structure, wherein the inner wall of the middle section of the dynamic pressure bearing is provided with a dynamic pressure groove, and the inner wall of the end section of the dynamic pressure bearing is flat.
The inner wall of tip section levels among this dynamic pressure bearing, and the inner wall of interlude is provided with moves and presses the ditch for its application process tip and interlude form the pressure differential to the lubricating oil between this dynamic pressure bearing and the pivot, do benefit to the little interlude of lubricating oil flow direction pressure, thereby reduce the risk that lubricating oil was revealed in dynamic pressure bearing's both ends department, and the security is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for machining a dynamic pressure bearing according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a hydrodynamic bearing according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a hydrodynamic bearing according to an embodiment of the present invention;
wherein, in the above fig. 2-3:
dynamic pressure bearing 100, dynamic pressure groove 101.
Detailed Description
The embodiment of the invention discloses a processing method of a dynamic pressure bearing, which is characterized in that a position on a dynamic pressure groove corresponding to the end part of the dynamic pressure bearing is filled to increase the pressure of the position on lubricating oil, so that the lubricating oil is enabled to flow to the position on the dynamic pressure bearing where the dynamic pressure groove is arranged, the oil leakage risk is reduced, and the safety of the dynamic pressure bearing is improved. The embodiment of the invention also discloses a dynamic pressure bearing manufactured by the processing method, which comprises a middle section with a dynamic pressure groove and an end section with a smooth inner surface, and has small risk of oil leakage and high safety.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, an embodiment of the invention provides a method for machining a dynamic pressure bearing 100, which includes:
1) preparing raw material powder and mixing the raw material powder;
2) forming the raw material powder into a dynamic pressure bearing workpiece by adopting a die forming mode;
3) sintering the dynamic pressure bearing workpiece;
4) the dynamic pressure groove 101 on the inner surface of the dynamic pressure bearing workpiece is filled and leveled at a position corresponding to the end of the dynamic pressure bearing workpiece.
In the method for machining the dynamic pressure bearing 100 according to the embodiment of the present invention, the dynamic pressure groove 101 on the inner surface of the dynamic pressure bearing 100 is filled to a position corresponding to the end of the dynamic pressure bearing 100, so that the pressure of the end of the dynamic pressure bearing 100 on the lubricating oil is increased, the lubricating oil is forced to flow to the middle section of the dynamic pressure groove 101 provided in the dynamic pressure bearing 100, the risk that the lubricating oil leaks from the dynamic pressure groove 101 at the two ends of the dynamic pressure bearing 100 is reduced, and the safety of the dynamic pressure bearing is improved.
Since both ends of the hydrodynamic bearing 100 are at risk of oil leakage, in the above embodiment, the step 4) specifically includes:
41) filling and leveling a position, corresponding to the first end of the dynamic pressure bearing workpiece, on a dynamic pressure groove 101 on the inner surface of the dynamic pressure bearing workpiece, and finishing the dynamic pressure bearing workpiece;
42) and (3) filling and leveling the position, corresponding to the second end of the dynamic pressure bearing workpiece, of the dynamic pressure groove 101 on the inner surface of the dynamic pressure bearing workpiece, and finishing the dynamic pressure bearing workpiece.
The finishing in the step 41) and the step 42) respectively refers to finishing the inner hole of the dynamic pressure bearing workpiece, and the precision reaches the mu level; of course, finishing in step 41) refers to finishing the inner bore at the first end of the dynamic pressure bearing workpiece, and finishing in step 42) refers to finishing the inner bore at the second end of the dynamic pressure bearing workpiece. The finishing in step 41) described above may be omitted, and accordingly, the finishing in step 42) should be arranged to finish the inner bores at the first end and the second end of the dynamic pressure bearing workpiece, respectively.
The leveling of the dynamic pressure groove 101 in step 41) and step 42) means that the raw material powder is pressed against the dynamic pressure groove 101 at a portion to be leveled.
Since the raw material of the hydrodynamic bearing 100 is in a powder state, in order to facilitate the raw material molding, the molding in the step 2) is specifically to place the raw material powder in a mold and perform extrusion molding.
In order to ensure high dimensional accuracy of the hydrodynamic bearing 100 at various positions, in the above embodiment, the method further includes, between step 2) and step 3): and step 23) finishing the dynamic pressure bearing workpiece. In the scheme, the dynamic pressure bearing workpiece is finished before sintering, so that on one hand, a user can conveniently finish, and on the other hand, the sintered dynamic pressure bearing workpiece can be ensured to have high dimensional accuracy.
In the method for machining the dynamic pressure bearing 100 according to the embodiment, after the step 4), the method further includes: 5) cleaning the dynamic pressure bearing workpiece, soaking the dynamic pressure bearing workpiece in oil, and finally packaging. The dynamic pressure bearing workpiece is subjected to oil immersion in the step 5), so that the service life of the dynamic pressure bearing 100 can be prolonged.
The embodiment of the invention also provides a dynamic pressure bearing 100, which is specifically a dynamic pressure bearing manufactured by adopting the processing method provided by the embodiment.
The dynamic pressure bearing 100 is a cylindrical structure, and a dynamic pressure groove 101 is arranged on the inner wall of the middle section of the dynamic pressure bearing 100, and the inner wall of the end section of the dynamic pressure bearing 100 is flat.
In the dynamic pressure bearing 100 provided by the embodiment of the invention, the inner wall of the end part section is flat, and the dynamic pressure groove 101 is only arranged in the middle section of the dynamic pressure bearing 100, so that the end part and the middle section form a pressure difference on the lubricating oil between the dynamic pressure bearing 100 and the rotating shaft in the application process, the lubricating oil can flow to the middle section with smaller pressure, the risk of leakage of the lubricating oil from the two ends of the dynamic pressure bearing 100 is reduced, and the safety is higher.
In the dynamic pressure bearing 100, the dynamic pressure grooves 101 are plural, and each dynamic pressure groove 101 is parallel to the axial direction of the dynamic pressure bearing 100. In the dynamic pressure bearing 100 provided by the embodiment of the invention, the arrangement direction of the dynamic pressure groove 101 is beneficial to uniform distribution of lubricating oil between the dynamic pressure bearing 100 and the rotating shaft, and the safety of the dynamic pressure bearing is further improved.
In order to further enable the dynamic pressure bearing 100 to distribute lubricating oil uniformly during the application process to ensure that there is no mutual wear between the dynamic pressure bearing 100 and the rotating shaft, the dynamic pressure grooves 101 in the dynamic pressure bearing 100 are arranged to be distributed uniformly in the circumferential direction of the dynamic pressure bearing 100.
The dynamic pressure bearing 100 provided by the embodiment of the present invention employs the processing method provided by the above embodiment, and has other effects of the processing method provided by the above embodiment, and details are not described here.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method of machining a dynamic pressure bearing, comprising:
1) preparing raw material powder and mixing the raw material powder;
2) forming the raw material powder into a dynamic pressure bearing workpiece by adopting a die forming mode;
3) sintering the dynamic pressure bearing workpiece;
4) filling and leveling the dynamic pressure groove on the inner surface of the dynamic pressure bearing workpiece at the position corresponding to the end part of the dynamic pressure bearing workpiece so as to increase the pressure of the end part of the inner surface of the dynamic pressure bearing workpiece on the lubricating oil and promote the lubricating oil to flow to the middle section of the dynamic pressure groove arranged on the dynamic pressure bearing workpiece;
the dynamic pressure groove is parallel to the axial direction of the dynamic pressure bearing workpiece;
after the step 2), before the step 3), further comprising:
finishing the dynamic pressure bearing workpiece;
the step 4) comprises the following steps: 41) filling and leveling a position, corresponding to the first end of the dynamic pressure bearing workpiece, on a dynamic pressure groove on the inner surface of the dynamic pressure bearing workpiece; 42) filling and leveling the position, corresponding to the second end of the dynamic pressure bearing workpiece, of the dynamic pressure groove on the inner surface of the dynamic pressure bearing workpiece, and respectively finishing inner holes at the first end and the second end of the dynamic pressure bearing workpiece; in the step 41) and the step 42), the raw material powder is extruded to the part to be leveled on the dynamic pressure groove.
2. The method of claim 1, wherein the step 42) of finishing the hydrodynamic bearing workpiece is performed to an accuracy of the order of micrometers.
3. The method of claim 1, wherein the molding in step 2) is carried out by placing the raw material powder in a mold and extruding the powder.
4. A method of processing a dynamic pressure bearing according to any one of claims 1 to 3, further comprising, after the step 4):
5) cleaning the dynamic pressure bearing workpiece, soaking the dynamic pressure bearing workpiece in oil, and packaging.
5. A dynamic pressure bearing, characterized in that the dynamic pressure bearing is a dynamic pressure bearing manufactured by the processing method according to any one of claims 1 to 4; the dynamic pressure bearing is of a cylindrical structure, a dynamic pressure groove is formed in the inner wall of the middle section of the dynamic pressure bearing, and the inner wall of the end section of the dynamic pressure bearing is flat; the dynamic pressure grooves are multiple and are respectively parallel to the axial direction of the dynamic pressure bearing.
6. The hydrodynamic bearing of claim 5, wherein the hydrodynamic grooves are uniformly distributed along a circumferential direction of the hydrodynamic bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404884.6A CN105864279B (en) | 2016-06-08 | 2016-06-08 | Dynamic pressure bearing and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404884.6A CN105864279B (en) | 2016-06-08 | 2016-06-08 | Dynamic pressure bearing and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105864279A CN105864279A (en) | 2016-08-17 |
| CN105864279B true CN105864279B (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610404884.6A Active CN105864279B (en) | 2016-06-08 | 2016-06-08 | Dynamic pressure bearing and processing method thereof |
Country Status (1)
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| CN (1) | CN105864279B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1398220A (en) * | 1921-01-31 | 1921-11-29 | Jr Edward Goodrich Acheson | Bearing |
| CN1156221A (en) * | 1995-10-28 | 1997-08-06 | 大宇电子株式会社 | Dynamic pressure bearing device and magnetic drum device of cassette tape video recorder with it |
| KR100224000B1 (en) * | 1996-08-19 | 1999-10-15 | 이형도 | Sintered porous bearing |
| DE19947462C1 (en) * | 1999-10-02 | 2000-10-26 | Simon Karl Gmbh & Co Kg | Sinter bearing ring for engine and drive transmission has inserted shaft supplied with lubricant via lubricant ridge strutures with helical elongate extending along bearing bore between bearing ring end faces |
| JP2002058200A (en) * | 2000-08-10 | 2002-02-22 | Matsushita Electric Ind Co Ltd | Spindle motor and floppy (registered trademark) disk device |
| CN104879386A (en) * | 2015-06-23 | 2015-09-02 | 江苏鹰球集团有限公司 | Powder metallurgy ultralow-noise and long-service-life oil-impregnated bearing |
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2016
- 2016-06-08 CN CN201610404884.6A patent/CN105864279B/en active Active
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| CN105864279A (en) | 2016-08-17 |
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