CN1128942C - Arc-shaped elastic metal-plastic bush - Google Patents
Arc-shaped elastic metal-plastic bush Download PDFInfo
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- CN1128942C CN1128942C CN 99101414 CN99101414A CN1128942C CN 1128942 C CN1128942 C CN 1128942C CN 99101414 CN99101414 CN 99101414 CN 99101414 A CN99101414 A CN 99101414A CN 1128942 C CN1128942 C CN 1128942C
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- oil
- plastic
- elastic metal
- bearing
- arc
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Abstract
The present invention relates to an arc-shaped elastic metal plastic bearing bush classified under sliding bearings of machinery, which is an inlaid welding body composed of a plastic friction layer, an elastic metal layer and a metal bush body. The present invention solves the problems of thermal stress concentration, bad oil film formation and edge effect influence during the operation of the existing bearing bush. The present invention is characterized in that the whole circumferential plastic surface is divided into a plurality of sections, and a lead-in surface A, an oil inlet wedge surface B, a weight bearing surface C and an oil outlet surface D are respectively arranged in each section; the radius of a sectional bearing bush is 0.5 to 3% larger than that of a shaft, and a vertical cylindrical bearing bush is sectioned according to oil grooves; the lower half bush of a horizontal cylindrical bearing bush is at least divided into three sections.
Description
Affiliated field:
Arc-shaped elastic metal-plastic bush belongs to mechanical sliding bearing.
Technical background:
Existing arc-shaped elastic metal-plastic bush is by the frosting layer, and elastic metallic yarn layer and metal watt body constitutes.Patent 96202262.4 has been recorded and narrated the structure of this plastic bearing shell.Because the frosting of this bearing shell is a kind of arc surface, it and axial plane are gapped concentric discs.In use in recent years, a lot of accidents that rise have been caused.The severe patient tile kilning and the axle journal that worn and torn have caused very big loss.To such an extent as to some users publish an article " hydraulic turbine generator should not adopt the polytetrafluoroethylene guide bearing block " to come negate the application of circular arc plastic bearing shell.(seeing " hydroelectric power plant " 1998 third phases).According to analysis is because some performances of elastic metal plastic bearing itself cause.The thermal coefficient of expansion of plastic cover is 8-10 wiry times, and the heat expansion that the temperature rising produces accumulates on whole circumference and produces very big stress; Secondly, because the breathing amount of plastics is bigger, therefore, it is unstable relying on axle to change formed oil film wedge.The unstable rule oil film of oil film wedge also can be damaged and produce tile kilning.It three is influences of the edge effect of elastic metal plastic tile.The plastic cover expanded by heating is subjected to the constraint of elastic metallic yarn, produces the edge than the slightly high 0.03-0.10 of central tile, and the phenomenon of this edge protuberance is called edge effect.Edge effect has also destroyed oil film and has caused accident.If can overcome the influence of these three kinds of factors, the circular arc plastic bearing shell still is coming.
Goal of the invention:
The invention provides a kind of arc-shaped elastic metal-plastic bush, it can decompose the thermal stress of plastics tiling, has oil film wedge naturally, eliminates the influence of edge effect in advance.It is a kind of elastic metal plastic bearing of safety and reliability.
Summary of the invention:
The present invention imagines like this: whole plastic cover circumference is divided into plurality of sections, and then its stress also can correspondingly be disperseed; On the plastics tiling, create oil film wedge, make it exist the condition that oil film generates naturally; At oil film wedge and go out the backward deformation value that pasta has preestablished edge effect, its normal operation to oil film just can not exert an influence.
The present invention is achieved in that
The plastic cover of whole circumference is divided into not consecutive plurality of sections, and each section is provided with the A approaching face respectively, B oil-feed wedge surface, and the C weight-bearing surface, D goes out pasta.An oil slick thickness and the axle gap of rising are arranged between C weight-bearing surface and axial plane.B oil-feed wedge surface and axial plane have a meniscate oil film wedge space.The distance of import and axial plane adds the thick summation that adds the plastic edge effect value again of oil film more than 2 times greater than the axle gap of rising.It also is meniscate space that D goes out between pasta and axial plane, and outlet and the distance of axial plane add the thick summation that adds the plastic edge effect value again of oil film more than 1 times greater than the axle gap of rising.The A guide face is that 5-20 is wide, and 20-30 ° inclined-plane is arranged, and is beneficial to the importing of oil.The width of B oil-feed wedge surface should be greater than the sixth of this section plastic cover arc length.The little oil film pressure that then forms is little.But can not be oversize, generally should be greater than 1/2nd of this section arc length.Though because big can improve oil film pressure, it also is worthless reducing weight-bearing surface.D goes out pasta should be greater than 1/8th this section tiling arc length.If the big oil pressure that can make oily pressure release accelerate to reduce weight-bearing surface.If the too for a short time oil stream that makes slows down.Be unfavorable for scattering and disappearing of tiling temperature.Optimal state is that the whole circumference watt-minute is become some and form the blocking type arc-shaped elastic metal-plastic bush.Because independent between every watt, so the heat expansion distortion can not produce cumulative stress.Every watt is provided with the A guide face, B oil-feed wedge surface, and the C weight-bearing surface, D goes out pasta.For easy to process, adopt the simple process of plastic made tile radius surface greater than axle radius 0.5%-3%.
Vertical shaft cartridge type elastic metal plastic bearing can be by the segmentation of oil groove nature, and every section is provided with A and goes into guide face, and B oil-feed wedge surface, C weight-bearing surface, D go out pasta, and they are parallel with oil groove.
For oil-feed is not mixed mutually with fuel-displaced, can also design oil groove separately.Oil-feed tank is communicated with oil inlet hole like this, and shut the oil-feed tank upper end, helps to keep input pressure.Go out the oil groove lower end and shut, upper end open, fuel-displaced smooth to guarantee.
Horizontal cylinder elastic metal plastic bearing meets under the face by the level branch that half block is watt minimum to be divided into three sections, and every section is provided with B and advances wedge surface, the C weight-bearing surface, and D is fuel-displaced.Should keep weight-bearing surface perpendicular bisector greater than ± 25 ° in.The oil-feed wedge surface should be shut with the two ends that go out pasta, in order to avoid the edge draining.
Good effect of the present invention:
Compared with prior art, make a whole set of tiling be divided into plurality of sections, disperseed thermal stress; Every section is provided with the A approaching face, B oil-feed wedge surface, the C weight-bearing surface, D goes out pasta, makes a whole set of plastic made tile surface present a plurality of arcuate surface, naturally there is oil film wedge, so that exist the condition that oil film exists naturally, when turnover oil film wedge face is set, preset the plastic edge effect again, so in case after the operation, can't exert an influence to oil film.Because above-mentioned factor makes the operation of arc-shaped elastic metal-plastic bush safer, more reliable.
Description of drawings:
Figure of description 1 is the axial schematic representation of blocking type arc-shaped elastic metal-plastic bush of the present invention;
Accompanying drawing 2 is axial schematic representation of vertical shaft cartridge type elastic metal plastic bearing of the present invention;
The unfolded drawing of the plastics tiling of accompanying drawing 3 after to be vertical shaft cartridge type elastic metal plastic bearings of the present invention by the joint close face M-N of two lobes combination launch;
Accompanying drawing 4 is the plastics tiling unfolded drawings after the vertical shaft cartridge type elastic metal plastic bearing joint close face M-N that has two oil grooves of the present invention launches;
Accompanying drawing 5 is axial schematic representation of horizontal cylindrical shape elastic metal plastic bearing of the present invention;
Accompanying drawing 6 is low brass plastics tiling unfolded drawings of horizontal cylindrical shape elastic metal plastic bearing of the present invention.
Embodiment:
Above-mentioned the description of the drawings is described below in conjunction with most preferred embodiment:
Example 1: the piecemeal arc-shaped elastic metal-plastic bush as shown in Figure 1.This figure is the schematic representation from axially looking.1 is axle among the figure, its radius 200 ± 0mm (following unit omits), and its moving direction of axle is shown in arrow V.The 0th, the center of axle.The 2nd, the plastics tile fragment of piecemeal, its surface is the telfon plastic layer, and thick about 2.5, elasticity copper wire and plastics are inlayed, and it is whole that copper wire becomes with watt basic soldering of steel again.It is divided into six, 54 ° of every radians, outer arc radius 300.Every watt of height is 180.Intrados is the plastics tilings, by the axle sense of rotation, sets gradually the A approaching face, B oil-feed wedge surface, and the C weight-bearing surface, D goes out pasta.Owing to be the structure of piecemeal, should establish the A face is 10 * 30 ° of guide faces, and BCD can be at the R greater than the axle radius
1, its center P and 0 has eccentric.Calculate every watt intrados radius R below
1Value.The import of at first setting B oil-feed wedge is 1-3 times of oil slick thickness 0.03, then 3 * 0.03=0.09; 2) the plastic edge effect gets 0.05 according to test curve.Both addition 0.05+0.09=0.14.Thus serve as the figure method, or geometric calculation is calculated R
1=207.35.The bearing shell frosting is pressed radius R
a=1207.35+, the coarse end, be lower than R
a0.4 below.When mounted, make weight-bearing surface C and axle journal that 0.15 the gap thermal expansion value as axle be arranged.
Example 2: vertical shaft cartridge type elastic metal plastic bearing is seen Fig. 2, shown in Figure 3.Fig. 2 is a pseudosection, and Fig. 3 is that the half block bearing shell launches the unfolded drawing of its plastic cover of back along joint close face M-N down.3 is sections of axle among the figure, the 0th, and a center, axle radius R
0=300. ± 0.The 4th, the cartridge type elastic metal plastic tile combines by two, and M-N is the joint close face.Cartridge type watt height H=400.Oil inlet hole is arranged, in the oil groove Q of totally 4 bottoms that are symmetrically distributed in bearing shell.Be wide 20 dark 5 annular groove, apart from the most following rapid 25, oil groove Q is connected with oil-feed tank E.V is the sense of rotation of axle.The E oil groove is to sense of rotation inclination 55-60 degree.The E oil groove is divided into four sections with the interior frosting of cartridge type bearing shell, can eliminate the influence of thermal stress effectively.Begin to set gradually A approaching face, B oil-feed wedge surface, C weight-bearing surface, D from the E oil groove and go out pasta along sense of rotation.The radius R of C weight-bearing surface
0Should be that a radius adds oil slick thickness and axle thermal expansion value, i.e. RC=300+0.03+0.20=300+0.23.The inlet of B oil-feed wedge surface is that 3 times of oil film 3 * 0.03=0.09 add plastic edge effect 0.05 and amount to 0.14 apart from C weight-bearing surface distance of round.It is 3 degree arc length that the width of B oil-feed wedge surface is got 1/3 of long 90 degree of this cambered surface.Utilize numeration to calculate R1=288.34.The outlet distance that D goes out pasta is that 2 times of oil film 1.5 * 0.03=0.045 add plastic edge effect 0.05 and amount to 0.095 and get 0.09.Calculate R2=232.44.The A approaching face is to do 20 * 30 ° inclined-plane on the basis of B face.The roughness of all A, B, C, D face is all at R
a0.4 below.All A, B, C, D are all parallel with oil groove E.When operation, oily W enters oil groove Q from oil inlet hole 6 like this, and rotating power makes it rise along the E oil groove, imports at the B face through the A face and forms oil film wedge, produces pressure and enters the C weight-bearing surface.Then accelerate during to D to flow to the E oil groove from top outflow.
Example 3: the cylinder elastic metal plastic bearing of two oil ducts as shown in Figure 4.Here different with example 2 is to be provided with F to go out oil groove, and E then becomes the groove of single oil-feed.E is connected with oil groove Q, but above seal.Go out oil groove F upper end open but the lower end is sealed, oil stream W enters oil groove Q from oil inlet hole 6 like this, enters the E oil-feed tank with the power of rotation V, flows out stain groove F by A, B, C, D, flows out bearing shell then.Such setting makes turnover oil be unlikely to mix, and helps oily stream and takes away heat, reduces the temperature of tiling.
Example 4: horizontal cylindrical shape elastic metal plastic bearing as shown in Figure 5 and Figure 6.Fig. 5 is an axial view, and Fig. 6 is a lower bearing plastics tiling unfolded drawing.7 is to go up half-watt among the figure, the 8th, and axle, the diameter of axle 460 ± 0.9th, low brass, the joint close face of it and upper half-bearing is MN, the 10th, the space that oil film is shared, the 11st, oil inlet hole is arranged on the top bearing shell.Top bearing shell is divided into three sections, and lower bearing also is divided into three sections.8 top bearing shells are provided with three sections of AB-BC-CD from joint close face N beginning along sense of rotation.Lower bearing 9 is provided with AB from joint close face M along sense of rotation V
1-B
2C
2-C
3Three sections of D.The stage casing C of lower bearing 9 wherein
2The weight-bearing surface radian should be greater than 60 ° to guarantee load carrying capacity.The radius R D=230+0.03+0.14=230+0.17 of C weight-bearing surface, wherein 0.14 is a thermal expansion value, the 0.03rd, oil slick thickness.The import of B oil-feed wedge centre is that 3 * 0.03=0.09 adds plastic edge effect 0.043 and amounts to 0.133 apart from the distance of C weight-bearing surface circumference.It is 1.5 * 0.03+0.043=0.09 that D goes out pasta outlet distance.Can calculate R1=221.3, R2=198.5 thus.Three sections of upper half-bearing can mean allocation.And low brass is in order to guarantee C2=60 degree radian face, B2=20 radian face, and B1=15 radian face then, C1=20 radian face, B3=20 radian face, C3=30 radian face, then D is 5 radian faces.It is 15 * 30 degree that A imports the angle.In order to make oily stream be unlikely to release from the limit end, each cambered surface adopts circular arc, has only A face and the last pasta D that goes out to adopt planarea.But can adopt sphere to contact with axle bed in order to make horizontal bearing shell have the aligning performance bearing shell.
The relevant explanation of nouns of the present invention:
1, circular arc: this is that to be used for describing bearing shell friction surface shape facility be the cylinder arc shape.The cylinder cambered surface is meant the part of rotating formed curved interior surface with the straightway of certain straight line parallel around this straight line.Its outer surface then is called the cylinder cambered surface.
2, circular arc bearing shell is meant the bearing shell with cylinder cambered surface friction surface feature.It is by two pieces watts, or forms a cylindrical shape more than two.Between tile fragment and tile fragment, be spaced, mutually watt independently during situation, then be called blocking type circular arc bearing shell, or split circular arc bearing shell.When between tile fragment being interconnects contact when being combined into complete cylindrical shape, then be called the cartridge type bearing shell.If when only constituting a complete cylindrical shape, generally be not called bearing shell, and be called axle sleeve by one piece watt.When axle was horizontal setting, the bearing shell of circular arc then was called horizontal spool tile or bearing shell radially, or bearing shell entad.
Claims (5)
1, the arc-shaped elastic metal-plastic bush that relates to a kind of Machinery Ministry sliding bearing branch is inlayed the welding body by what plastics friction layer, elastic metal layer and metal watt body were formed, it is characterized in that:
(1) a whole set of plastics circumferential surface is divided into plurality of sections;
(2) every section plastic cover is gone out pasta and is constituted by A approaching face, B oil-feed wedge surface, C weight-bearing surface, D;
(3) B oil-feed wedge surface and axial plane are the half moon spaces, and its inlet adds a plastic edge effect and the bloated value of axle apart from axial plane apart from the oil film greater than 2 times, and its length is sixth to two/one of this section cambered surface length;
(4) D goes out pasta and axial plane is the half moon space, and its outlet port adds plastic edge effect and the axle value that expands apart from the distance of axial plane greater than 1.5 times oil film, and its length is not more than 1/8th of this section cambered surface length.
2, arc-shaped elastic metal-plastic bush as claimed in claim 1 is characterized in that the weight-bearing surface of blocking type bearing shell and passes in and out percent 0.5-3 of pasta radius greater than the axle radius.
3, arc-shaped elastic metal-plastic bush as claimed in claim 1 is characterized in that vertical shaft drum type bearing shell along the oil groove segmentation, and every section is provided with A approaching face, B oil-feed wedge surface, C weight-bearing surface, D and goes out pasta they are all parallel with oil groove.
4, arc-shaped elastic metal-plastic bush as claimed in claim 1 is characterized in that the following half-watt plastic cover of horizontal axis cylinder bearing shell is minimum and is divided into three sections; The C weight-bearing surface of its perpendicular bisector place section must not be less than 50 degree cambered surfaces.
5, as claim 1 or 4 described arc-shaped elastic metal-plastic bush, the surface of contact that it is characterized in that bearing shell and bearing support is a sphere shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99101414 CN1128942C (en) | 1999-01-20 | 1999-01-20 | Arc-shaped elastic metal-plastic bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99101414 CN1128942C (en) | 1999-01-20 | 1999-01-20 | Arc-shaped elastic metal-plastic bush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1261131A CN1261131A (en) | 2000-07-26 |
| CN1128942C true CN1128942C (en) | 2003-11-26 |
Family
ID=5270416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99101414 Expired - Fee Related CN1128942C (en) | 1999-01-20 | 1999-01-20 | Arc-shaped elastic metal-plastic bush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128942C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251905A (en) * | 2010-05-20 | 2011-11-23 | 孙晶 | Multi-post supporting gold plastic tile thrust bearing |
| CN102817905A (en) * | 2011-06-11 | 2012-12-12 | 邹高万 | Plastic slide block bearing |
| JP2013103472A (en) * | 2011-11-16 | 2013-05-30 | Polyplastics Co | Insert molding |
| CN105673696B (en) * | 2014-11-17 | 2018-10-09 | 孙守驯 | Elastic metal plastic bearing |
| CN104930060A (en) * | 2015-06-26 | 2015-09-23 | 芜湖创智机械技术有限公司 | Hollow-out type automotive bearing |
-
1999
- 1999-01-20 CN CN 99101414 patent/CN1128942C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1261131A (en) | 2000-07-26 |
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