CN2042905U - Bearing and bearing unit with solid lubricating surfaces - Google Patents
Bearing and bearing unit with solid lubricating surfaces Download PDFInfo
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- CN2042905U CN2042905U CN 88220845 CN88220845U CN2042905U CN 2042905 U CN2042905 U CN 2042905U CN 88220845 CN88220845 CN 88220845 CN 88220845 U CN88220845 U CN 88220845U CN 2042905 U CN2042905 U CN 2042905U
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- bearing
- solid lubrication
- bearing part
- lubrication surface
- base material
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Abstract
The utility model discloses a bearing and bearing unit with solid lubricating surface including a solid lubrication skin layer which is combined with the bearing base material on the friction surface and does the sulphurizing process on the bearing friction surface. The density of the sulfide is gradually reduced from the surface to the center. The layer depth of the sulfide is at least 20 mu m and is 50 mu m-150 mu m in general and is decided by the operating status of the bearing. The grain of the sulfide is controlled smaller than 1 mu m and is dispersedly distributed in the base. The produced bearing friction coefficient is reduced 1/5-4/5 and the abrasive quantity is smaller. The bearing and bearing unit with solid lubricating surface can use 45 number steel as the bearing and the bearing and bearing unit with solid lubricating surface has low cost.
Description
The utility model relates to a kind of bearing and bearing part with solid lubrication surface, particularly carries out bearing and the bearing part that sulfurizing is handled about the surface.
Usually people are divided into two big class, i.e. overall structure and composite structures to rolling and sliding bearing (comprising bearing part) by the structure of manufactured materials.Integrally-built bearing and bearing part (being designated hereinafter simply as bearing) are that metallurgy combination is formed unified integral body, as shown in Figure 1, bearing only is made up of matrix 1, and the rolling bearing that this common class bearing has the GCr15 steel to do reaches the sliding bearing by Cuprum alloy, gray cast iron or copper base, iron-based, aluminium base powder metallurgy system.Rolling bearing also makes with the low-carbon alloy steel carburizing and quenching usually, as shown in Figure 2, forms the carbide and the martensite 2 of metallurgy combination on the top layer of base material, and the concentration of carbon reduces gradually from the surface to heart portion.But the friction factor and the wear extent of the bearing of said structure are bigger, and the life-span is shorter, and be especially more outstanding under the higher occasion of heavy duty and temperature.
The bearing of compound structural be metal and metal with compound between by mechanical bond or mix and do not make by metallurgy combination, comprise following a few class: (a) adopt plating, deposition, sputter on bearing base material 1 surface, forming element or compound layer 2, see Fig. 3, as vacuum operating bearing (29 pieces of " mechanical engineering manual " 5 volumes) and the TiC sedimentary deposit or the M of gold-plating layer and silver plating layer
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2The bearing of sputtering layer (" solid lubrication " 1986 1 phase 31-36,1988 1 phase 23-27).(b) existing general bearing shell is a watt back of the body with steel generally, and shown in the matrix among Fig. 41, copper or aluminium or silver are mesosphere 4, and outermost is bearing metal or indium coating 5.(c) composite structure of base material and oiling agent (Fig. 5) is as the composite structure (" lubricated and sealing " 85 years 2 phase 25-31) that adopts self lubricating material teflon 6 and ferro element base material to mix mutually.Most its friction factor of the rolling of above-mentioned composite structure and sliding bearing and wear extent are also bigger, and the life-span is shorter, and has gold and silver and TiC or M
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2Though the bearing friction factor of layer is little, only be used under the not too high environment of low load and operating temperature, the cost costliness can not obtain widely applying.
Thereby the purpose of this utility model provides a kind of novel integrally-built rolling sliding bearing and bearing part, (being designated hereinafter simply as bearing), bearing surface is a sulphide, friction factor is little, can work under unlubricated grease of heavy duty and higher temperature, and cost is low.
The utility model adopts the method for sulfurizing to make on the rubbing surface of bearing for this reason the solid lubrication sulphide top layer that forms with bearing base material chemical combination, sulphide density reduces to heart portion gradually on the surface, the layer depth of sulfur compound is at least 20 μ m, sulphide is distributed in the matrix with the particle form disperse, and size of grain is controlled at below 1 μ.
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.The Fig. 1 to 5 here is the structural representation on prior art middle (center) bearing top layer, wherein
Fig. 1 is the overall structure schematic representation;
Fig. 2 is the schematic representation of carbide and martensite CONCENTRATION DISTRIBUTION between overall structure surface and the heart portion;
Fig. 3 is a two-layer structure mechanical bond formula schematic representation;
Fig. 4 is a three-decker mechanical bond formula schematic representation;
Fig. 5 hybrid architecture schematic representation;
Fig. 6 is the integrally-built bearing surface sulphide distribution schematic diagram in the utility model.
Fig. 7 is Fe for overall structure bearing outermost of the present utility model
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4Schematic representation.
Referring to Fig. 6, wherein 1 is matrix, and its top layer has been covered with sulphide fine particle 7, and the long particle diameter of these sulfurations should be controlled at below 1 μ, and experiment shows that if sulphide occurs with the bulk form, then the bearing mechanical property descends in matrix.It is generally acknowledged and in matrix, exist sulphide to be harmful to, the sulphide of itself and matrix bond can influence mechanical property, wish that its content is low more good more, but the inventor finds, if in the matrix surface sulfurizing, be combined into the sulphide of small particles form with it, and matrix heart portion still keeps lower sulfide content, so both can make the mechanical energy of bearing constant substantially, and its surperficial wear resistance has improved greatly.Test shows, if sulfuric horizon thickness during less than 20 μ m its solid lubrication performance just poor, general sulfuric horizon THICKNESS CONTROL is determined by the bearing working state at 50 μ m～150 μ m.The method of surface sulfurizing has several, and wherein the method for carrying out sulfurizing with glow discharge is good, and the product that obtains is satisfactory.Usually carry out oxidation processes on the sulfuric horizon surface after the bearing sulfurizing with ferrous materials system, make bearing surface that the thick He of one deck 1～5 μ m be arranged
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4Corrosion protection lubricating layer 8, as shown in Figure 7.Bearing surface has sulphide and has formed the solid lubrication surface later on, and friction factor reduces by 1/5～4/5, can carry big load, and can work under the environment of higher temperature.Bearing with iron is an example, and the top layer generates the ferrous sulfide of nano sized particles after the sulfurizing, and its molten o'clock more than 1000 ℃, also can proper functioning under 600 ℃ of environment.
Bearing of the present utility model can be made by various materials, uses wider.When bearing was made by copper nickel, molybdenum, cobalt, titanium, chromium, zinc, aluminium and their alloy thereof, its surface generated different sulphide after the sulfurizing, more than various alloys comprise sintered metal product.When bearing during by steel, iron (comprising sintered metal product) and steel, iron (comprising sintered metal product) nitriding, carburizing, nitrocarburizing, boronising, siliconising made, generate the sulphide of iron, mainly be ferrous sulfide.If bearing is iron and steel (comprising carburizing, nitriding, nitrocarburizing, boronising, siliconising); Copper and Cuprum alloy, aluminium and aluminum alloy, titanium or titanium alloy, chromium and evanohm, nickel and nickel alloy, cobalt and cobalt alloy (cobalt base hard alloy), molybdenum and molybdenum alloy, the sintered metal product of zinc and zinc alloy and above alloy, and infiltrate and to be different from the metal of matrix or to plate the metal that is different from matrix element, as copper, chromium, aluminium, nickel, cobalt, tungsten etc., sulfurizing again on this basis, this moment, bearing outside surface had sulphur and matrix chemical combination and the solid lubrication surface that forms, and the oxide morphology on it is different fully with the Sulfide inclusion of metallurgy appearance usually.
The bearing of the utility model indication and bearing part comprise the mechanical parts that remove bearing and itself have lubricated surface, to replace bearing or bearing part.The bearing part of broad sense also comprises machine tool guideway, leading screw, and axle, these parts all require wear extent little, to guarantee enough machining accuracies.
Be test result below to the bearing of series of different.
1.GCr15 steel 203 radial ball bearings: FeS layer structural type such as Fig. 6 of having 80 μ～120 μ on the surface of bearing inner race, outer ring steel ball or carbon steel retainer, sulfurized layer thickness is different and different according to part and behaviour in service, outmost surface makes it to have 1～5 μ Fe through oxidation processes (can save)
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4The anti-rust and lubrication layer.On the ZS/30 testing machine, 10,000 rev/mins of rotating speeds, radial load 191kgf, No. 20 oil lubricatings, mean lifetime does not have the projected life (100 hours) of the plain bearing of lubricated surface high 3.8 times.
2. Internal and external cycle 45,40CrA or 65Mn steel, GCr15 ball 203 bearings;
The inside and outside circle of bearing, surface structure form such as Fig. 6 of ball or carbon steel retainer, and have the thickness of the FeS sulfurized layer of 80～120 μ, outmost surface makes it to have the Fe of 1～5 μ through oxidation processes (can save)
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4The anti-rust and lubrication layer.Through test, when rotating speed is 10000 rev/mins, during radial load 191kgf, mean lifetime surpasses the projected life of the GCr15 bearing of handling without sulfurizing.
3.20 steel, 45 molten steel bodies lubricate hydrodynamic sliding bearing (the easy interlock of 45 steel generally can not be made bearing)
The bearing table that this class steel is made and after having the FeS surface of 80～120 μ, be 1～5 times of bronze bearing working life.Generally the outmost surface at bearing also has 1～3 μ Fe
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4The anti-rust and lubrication layer.
4. gray iron, magnesium iron liquid lubrication hydraulic bearing
Gray iron, magnesium iron sliding bearing are after sulfurizing is handled, and its surface generates the FeS surface of 80～120 μ, and be 1～8 times of bronze bearing working life.Usually bearing outside surface also carries out oxidation processes, makes it to have the Fe of 1～3 μ structural type such as Fig. 7
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4The anti-rust and lubrication layer.
5. Cuprum alloy liquid lubricates hydraulic bearing
The copper/copper alloy bearing surface, structural type such as Fig. 6 have the FeS surface of 60～120 μ, and working life is high 1～3 times than the ordinary copper alloy bearing.
6.GCr15 steel dry friction 204 radial ball bearings
The inside and outside circle ball of bearing and the surface structure form of retainer such as Fig. 6 have the FeS layer about 120 μ, and outmost surface has the Fe of 1～2 μ again through oxidation processes
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4The anti-rust and lubrication layer, more common do not have the ball bearing of lubricated surface high 10～100 times working life during dry friction.
Claims (9)
1, a kind of bearing and bearing part with solid lubrication surface, said bearing part comprises the solid lubrication surface mechanical parts that remove bearing and itself have bearing performance, it is characterized in that: the solid lubrication sulphide top layer that forms with bearing and bearing part base material chemical combination is arranged on the rubbing surface of bearing and bearing part, the density of sulphide reduces gradually from surface to heart portion, described sulfurized layer is at least 20 μ m deeply, sulfide grain is controlled at below 1 μ, and disperse is distributed in the said matrix.
2,, it is characterized in that the described sulfuric horizon degree of depth is at 50～150 mu m ranges according to said bearing and the bearing part of claim 1 with solid lubrication surface.
3,, it is characterized in that described base material can be a kind of in iron, copper, nickel, molybdenum, cobalt, zinc, the aluminium element according to said bearing and the bearing part of claim 1 with solid lubrication surface.
4, according to said bearing and the bearing part of claim 1, it is characterized in that described base material comprises alloy with solid lubrication surface.
5, according to said bearing and the bearing part of claim 1, it is characterized in that said base material comprises sintered metal product with solid lubrication surface.
6, bearing and the bearing part with solid lubrication surface according to claim 1 is characterized in that the prior available nitriding of described matrix, carburizing, nitrocarburizing, boronising, a kind of processing in the siliconising method.
7,, it is characterized in that described matrix is in advance again with oozing copper, aluminising, ooze nickel, ooze cobalt, ooze molybdenum, oozing a kind of processing the in the tungsten method according to claim 1 or 6 described bearing and bearing part with solid lubrication surface.
8, according to claim 1 or 6 described bearing and bearing part with solid lubrication surface, it is characterized in that described matrix in advance again with aluminize, a kind of processing the in the nickel plating, cobalt plating, plating molybdenum, tangsten plating process.
9, according to said bearing and the bearing part of claim 1 with solid lubrication surface, when it is characterized in that described matrix is steel or iron on the rubbing surface also through oxidation processes, its outer surface has the Fe of 1～5 μ
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4Corrosion protection lubricating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88220845 CN2042905U (en) | 1988-12-12 | 1988-12-12 | Bearing and bearing unit with solid lubricating surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88220845 CN2042905U (en) | 1988-12-12 | 1988-12-12 | Bearing and bearing unit with solid lubricating surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2042905U true CN2042905U (en) | 1989-08-16 |
Family
ID=4852990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88220845 Withdrawn CN2042905U (en) | 1988-12-12 | 1988-12-12 | Bearing and bearing unit with solid lubricating surfaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2042905U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077667A (en) * | 2016-08-09 | 2016-11-09 | 浙江经宇科技发展有限公司 | Ferrous based powder metallurgical is high temperature resistant not oiliness bearing and manufacture method thereof |
| CN109234668A (en) * | 2018-11-26 | 2019-01-18 | 中国石油大学(华东) | A method of improving impactor piston properties of antifriction and wear resistance |
| CN110446868A (en) * | 2017-03-16 | 2019-11-12 | Ks滑动轴承有限公司 | The antifriction composite of the bearing metal layer of supporting layer and metal with metal |
-
1988
- 1988-12-12 CN CN 88220845 patent/CN2042905U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077667A (en) * | 2016-08-09 | 2016-11-09 | 浙江经宇科技发展有限公司 | Ferrous based powder metallurgical is high temperature resistant not oiliness bearing and manufacture method thereof |
| CN106077667B (en) * | 2016-08-09 | 2018-06-15 | 浙江经宇科技发展有限公司 | Ferrous based powder metallurgical high temperature resistant not oiliness bearing and its manufacturing method |
| CN110446868A (en) * | 2017-03-16 | 2019-11-12 | Ks滑动轴承有限公司 | The antifriction composite of the bearing metal layer of supporting layer and metal with metal |
| CN110446868B (en) * | 2017-03-16 | 2021-07-02 | Ks滑动轴承有限公司 | Plain bearing composite having a metallic carrier layer and a metallic bearing metal layer |
| CN109234668A (en) * | 2018-11-26 | 2019-01-18 | 中国石油大学(华东) | A method of improving impactor piston properties of antifriction and wear resistance |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |