CN101641525A

CN101641525A - Journal bearing device

Info

Publication number: CN101641525A
Application number: CN200880009879A
Authority: CN
Inventors: 南波聪; 三上诚; 向井一马; 武田信行
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 2007-03-28
Filing date: 2008-03-27
Publication date: 2010-02-03
Anticipated expiration: 2028-03-27
Also published as: JP2008240962A; CN101641525B; WO2008126362A1; KR20090114460A; JP5197977B2; BRPI0809625A2; BRPI0809625B1

Abstract

A journal bearing device (10) has upper half pads (21) on an upper half bearing section (20) of a bearing supporting a rotating shaft (50), and also has lower half pads (31) on a lower half bearing section (30). The lower half pads (31) are arranged on the inner peripheral surface of the lower half bearing section (30) with intervals in the circumferential direction of the surface. One of the lower half pads (31) is placed at a position perpendicularly below the rotating shaft (50).

Description

Journal bearing device

Technical field

The present invention relates to a kind of journal bearing device of supporting the running shaft of rotating machinery.

Background technique

The employed shaft bearing of rotating machinery is assembled as, the central shaft of bearing and the central axes of running shaft.But, when rotated because the direction of load or the distortion of running shaft etc., the central shaft that produces the central shaft of bearing and running shaft sometimes stagger for uneven state be misalignment.And when rotation during loading, the intersection point that for example produces sometimes with the central shaft of the central shaft of bearing and running shaft is the cone shape whirling on summit.In becoming this during operating condition, the damage (friction burn) that an end in contact causes may take place in the slip end of bearing.Therefore, in order to prevent the damage of running shaft as described above etc., various technology have been announced so far.Figure 11～Figure 13 is the figure of the profile construction of the existing journal bearing device of expression.

Journal bearing device shown in Figure 11 300 is disclosed in Japanese kokai publication hei 9-25932 communique.This journal bearing device 300 possesses: the back side is the bearing 301 of convex sphere; With slide with the sphere of this bearing 301, the surface is the pedestal 302 of matrix sphere.And in this journal bearing device 300, when on-stream running shaft 303 tilted, both sides' sphere slided and follows running shaft 303 and bearing 301 self-alignings.

Journal bearing device shown in Figure 12 320 is disclosed in Japanese kokai publication hei 5-32797 communique.This journal bearing device 320 is, on the slip surface of the bearing 321 that slides with running shaft 323, possesses the sliding layer 322 that is made of the good resinae composite material of sliding.By becoming this structure, under the situation of the end in contact that sliding axle 323 takes place, also prevent the wearing and tearing and the friction burn of sliding axle 323, can use as large size bearing.And, in TOHKEMY 2001-173659 communique following technology being disclosed: in elliptic bearing, removing on the part zone in addition on the bearing slip surface of bearing 321 sliding layer 322 is set.

Journal bearing device shown in Figure 13 330 is disclosed in TOHKEMY 2004-197890 communique.This journal bearing device 330 is the tilting pad bearings that all the time generally used as the good bearing of self-aligning.Tilting pad 331 is can easily follow the inclination of running shaft 333 to circumferencial direction and axioversion by pivot 332 supports such as grade.

As mentioned above, in existing journal bearing device, prevent the technology of damage of the bearing though proposed to follow the running shaft inclination when turning round, also have following problem.

The problem that exists in journal bearing device shown in Figure 11 is, under the bigger situation of load that bearing is loaded, the frictional force between sphere is excessive, and bearing is difficult to tilt, the tracing ability variation.Therefore, when the misalignment amount increases, rotate axle and an end in contact of bearing, (friction is burnt) might be damaged in the surface of running shaft and bearing.

And in journal bearing device shown in Figure 12, the wearing and tearing of bearing side develop in time, and the characteristic of bearing descends gradually, and it is difficult that the formation of the lubricant film on the slip surface becomes.When not forming lubricant film, the unusual temperature that frictional heat causes takes place to rise, the sliding layer deterioration owing to surpass the heat resisting temperature of resin, running shaft contacts with the surface of bearing and causes damage sometimes.And, in elliptic bearing, be provided with under the situation of sliding layer removing on the part zone in addition on the bearing slip surface, the problem that exists is, it is big that the zone of lubricant movement becomes, and the stirring of lubricant oil causes energy loss, or is difficult to carry out gap adjustment etc. for misalignment.

And, in journal bearing device shown in Figure 13, for example under the situation that is used as the such high loading of big capacity bulb hydraulic turbine generator, bearing that the slow-speed of revolution is used, exist because load and be difficult to bring into play the problem of original self-aligning for the inclination of running shaft.And also there are the following problems: load performance is poorer than the cylinder type bearing because slip surface is split into a plurality of, is difficult to form enough lubricant films, and it is very big etc. that bearing size becomes.

Patent documentation 1: Japanese kokai publication hei 9-25932 communique

Patent documentation 2: Japanese kokai publication hei 5-32797 communique

Patent documentation 3: TOHKEMY 2001-173659 communique

Patent documentation 4: TOHKEMY 2004-197890 communique

Summary of the invention

Therefore, the object of the present invention is to provide a kind of journal bearing device, even under big load, slow-revving situation, also can prevent the bearing that the inclination of the running shaft of on-stream generation causes or the damage of running shaft etc., can fully be suitable for the bearing of the running shaft that is ever-larger diameters.

According to a mode of the present invention, a kind of journal bearing device is provided, possessing first liner on the half bearing on the bearing of supporting rotating shaft, on bottom half-bearing, possesses second liner, it is characterized in that, circumferencial direction along the inner peripheral surface of above-mentioned bottom half-bearing is equipped with a plurality of above-mentioned second liners, 1 vertical below that is configured in running shaft in these a plurality of second liners with separating predetermined distance.

And, according to a mode of the present invention, a kind of journal bearing device is provided, possessing first liner on the half bearing on the bearing of supporting rotating shaft, on bottom half-bearing, possesses second liner, it is characterized in that, above-mentioned running shaft axially on separate predetermined distance ground and possess multiple row liner row, in this each liner is listed as in a plurality of second liners 1 is configured in below running shaft vertical; This liner is classified as and is separated a plurality of above-mentioned second liners of predetermined distance ground configuration along the circumferencial direction of the inner peripheral surface of above-mentioned bottom half-bearing and form.

Description of drawings

Fig. 1 is the figure of the section vertical with running shaft of the journal bearing device of expression the present invention the 1st mode of execution.

Fig. 2 is the figure of journal bearing device and the section running shaft level (the A-A section of Fig. 1) of expression the present invention the 1st mode of execution.

Fig. 3 is figure when lining, bottom half-bearing portion and the section running shaft level between the inner peripheral surface of expression second liner and bottom half-bearing portion.

Fig. 4 is the figure of the section vertical with running shaft of the journal bearing device of expression when with the eccentric angle θ of oil film pressure distribution second liner being set accordingly.

Fig. 5 is the figure of the section vertical with running shaft of the journal bearing device of expression when with the eccentric angle θ of oil film pressure distribution second liner being set accordingly.

Fig. 6 is the figure of the section vertical with running shaft of the journal bearing device of expression the present invention the 2nd mode of execution.

Fig. 7 is the figure of journal bearing device and the section running shaft level (the B-B section of Fig. 6) of expression the present invention the 2nd mode of execution.

Fig. 8 is the figure of the lubricant oil mobility status of the bottom half-bearing portion when representing from top observation bottom half-bearing portion.

The plan view of an example of the shape that Fig. 9 is expression when rotation shaft side is observed first liner on the inner peripheral surface be configured in the shaft bearing main body and second liner.

Figure 10 is the figure of the C-C section of presentation graphs 9.

Figure 11 is the figure of the profile construction of the existing journal bearing device of expression.

Figure 12 is the figure of the profile construction of the existing journal bearing device of expression.

Figure 13 is the figure of the profile construction of the existing journal bearing device of expression.

Symbol description

10 journal bearing devices; Half bearing portion on 20; 21 first liners; 21a, 31a surface layer; 21b, 31b body material; 30 bottom half-bearing portions; 31 second liners; 31a, 31b, 35 linings; 40 shaft bearing main bodys; 50 running shafts; W gravitational direction load

Embodiment

Below, with reference to description of drawings an embodiment of the invention.

(the 1st mode of execution)

Fig. 1 is the figure of the section vertical with running shaft 50 of the journal bearing device 10 of expression the present invention the 1st mode of execution.Fig. 2 is the figure of journal bearing device 10 and sections running shaft 50 levels (the A-A section of Fig. 1) of expression the present invention the 1st mode of execution.Fig. 3 is illustrated between second liner 31 and bottom half-bearing portion 30 inner peripheral surfaces figure when lining 35, bottom half-bearing portion 30 and sections running shaft 50 levels (axial section).

As shown in Figure 1, journal bearing device 10 constitutes, possess by possess on the inner peripheral surface first liner 21 on half bearing portion 20 and on inner peripheral surface, possess the shaft bearing main body 40 that the bottom half-bearing portion 30 of second liner 31 constitutes, and by first liner 21 and second liner 31 supporting rotating shafts 50.Last half bearing portion 20 is bearing portions of the upper half part when using horizontal plane by shaft bearing main body 40 centers that shaft bearing main body 40 is divided into 2 parts, and bottom half-bearing portion 30 is bearing portions of its lower half portion.

As shown in Figures 1 and 2, first liner 21 sets along circumferencial direction on the inner peripheral surface of last half bearing portion 20 with separating predetermined distance, and second liner 31 sets along circumferencial direction on the inner peripheral surface of bottom half-bearing portion 30 with separating predetermined distance.That is, first liner 21 and second liner 31 along the circumferential direction set under the state of cutting apart respectively.And first liner 21 and second liner 31 releasably are provided on the inner peripheral surface of half bearing portion 20 and bottom half-bearing portion 30.1 vertical below that is configured in running shaft 50 in a plurality of second liners 31 that disposed.And, first liner 21 and second liner 31 especially preferred disposition in radial direction load significantly on the inner peripheral surface of effect.By so disposing first liner 21 and second liner 31,, when gravitational direction load W heightens the earth rotation, also can guarantee sufficient load capacity even be under big load, the slow-revving situation at running shaft 50.In addition, so-called herein load capacity is meant the maximum load that can be supported by this bearing.

For and the surface of running shaft 50 of rotation between form oil film, the radius of curvature of first liner 21 and second liner 31 has the big some curvature of radius than running shaft 50.

Specified gap between each second liner 31 that is provided with in the bottom half-bearing portion 30 is preferably the degree that flows in the gap that lubricant oil can form between this second liner 31, wait suitably according to the temperature conditions of oil body etc. or use and set.

And, first liner 21 and second liner 31 constitute, possess

surface layer

21a, 31a on the surface of

body material

21b, 31b, this

surface layer

21a, 31a are formed by thermoplastic resin material or at least a thermoplastic resin material that contains the particle that is made of ceramic fiber, molybdenum disulfide and graphite etc.

Body material

21b, 31b are made of steel such as common steel or stainless steels.As the resin that constitutes

surface layer

21a, 31a, particularly, can enumerate polytetrafluoroethylene (PTFE) resin, polyether-ether-ketone (PEEK) resin, polyimide (PI) resin etc.And, as the thermoplastic resin material that contains the particle that constitutes by ceramic fiber, molybdenum disulfide or graphite etc., particularly, identical with above-mentioned resin, can enumerate polytetrafluoroethylene (PTFE) resin, polyether-ether-ketone (PEEK) resin, polyimide (PI) resin etc.The containing ratio of the material that thermoplastic resin material contained, be the ratio of weight of the resin of the material that contains with respect to comprising of the weight of the material that contained, be preferably 10～20 weight %.This scope more preferably reason is, under the situation less than 10 weight %, the effect of the material that contains can't obviously embody, and surpassing under the situation of 20 weight %, manyly also can't expect and the directly proportional effect of amount even contain.At this, containing under the situation of ceramic fiber, mechanical strength and abrasion resistance properties improve, and under the situation that contains the particle that is made of molybdenum disulfide or graphite etc., friction factor descends.

So, by being formed the surface of first liner 21 and second liner 31 by resin material, the situation that is used as the surface with employed softer metals is in the past compared, and friction factor declines to a great extent.Thus, for example when assembling operation, can make the moving axially of running shaft 50 on second liner 31 become easy.Particularly, by second liner 31 of configuration below running shaft 50 vertical, therefore the face of vertical lower side that can supporting rotating shaft 50 can make moving axially of running shaft 50 become easy.And, by forming the surface by resin material, has good wearability thus, therefore when the startup of running shaft 50, even at oil slick thickness under the thin or inchoate state of oil film, also can not use automatic lubricator, and the concentrated wear of the running shaft 50 that contacts or cause with an end in contact of running shaft 50 etc. of the surface that suppresses running shaft and pad surfaces or liner slip surface or damage.

In addition, the surface layer 21a of first liner 21 also can be made of softer metals, and this softer metals is that hardness ratio constitutes the little i.e. softness of material of running shaft 50, tolerates formed oil film pressure, and has wearing and tearing endurance.As this softer metals, for example can enumerate white metal etc.So softer metals being used as under the situation of surface layer, can be suitable for the manufacture method of existing bearing liner, therefore can realize the reduction of manufacture cost.And, in second liner 31, under situation about being configured on the less inner peripheral surface of radial direction load, also can constitute the surface layer 31a of second liner 31 by softer metals such as white metals.

At this, stagger for uneven state is under the situation of misalignment at the central shaft that shaft bearing main body 40 takes place and the central shaft of running shaft 50, the intersection point that produces sometimes with the central shaft of the central shaft of shaft bearing main body 40 and running shaft 50 is the cone shape whirling on summit.For fear of this state, also can be between the back side of first liner 21 of regulation and last half bearing portion 20 inner peripheral surfaces and/or between the back side and bottom half-bearing portion 30 inner peripheral surfaces of second liner 31 of stipulating, fix each

liner

21,31 across the lining 35 that works as thin plate, and adjust the bearing play.Thus, the rigidity of bearing increases, and can suppress above-mentioned whirling.And first liner 21, second liner 31 releasably are fixed in bearing portion, therefore also can move the allocation position or the increase and decrease liner quantity of first liner 21, second liner 31, and suppress above-mentioned whirling.Lining for example constitutes by the thin plate that formed by steel such as common steel or stainless steels or paper tinsel etc.

At this, situation about will fix across lining 35 between the back side of second liner 31 and bottom half-bearing portion 30 inner peripheral surfaces describes as an example.As shown in Figure 3, second liner 31 is by for example fixed component 36 being fixed from the outer circumferential side of bottom half-bearing portion 30 by screw 37, to be fixed to thus on bottom half-bearing portion 30 inner peripheral surfaces.Between the back side of second liner 31 and bottom half-bearing portion 30 inner peripheral surfaces, under the situation of thin plate, at first pull down fixed component 36, and lining 35 is inserted between the back side and bottom half-bearing portion 30 inner peripheral surfaces of second liners 31.Next, by the fixing fixed component 36 of screw 37.In addition, at state that running shaft 50 is raised, be that the load of running shaft 50 is not applied under the state on the shaft bearing main body 40, carry out the installation of above-mentioned lining 35.And the fixation method of second liner 31 is not limited to said method, so long as the method that second liner 31 can be fixed on bottom half-bearing portion 30 inner peripheral surfaces can.Also fix for first liner 21 by the method identical with second liner 31.

Next, the pressure distribution of the oil film that forms between running shaft 50 and second liner 31 is described.

Fig. 4 and Fig. 5 are the figure of the expression section vertical with running shaft 50 when accordingly second liner 31 being set with the eccentric angle θ of oil film pressure distribution 60, journal bearing device 10.In addition, lubricant oil is for example from the top of last half bearing portion 20 and supply in the shaft bearing main body 40 between 2 first liners 21.

Usually, in journal bearing device 10, when running shaft 50 rotation, by between journal bearing device 10 and running shaft 50, forming the oil film of lubricant oil, thus when keeping the lubricating of running shaft 50 by the load of journal bearing device 10 supporting rotating shafts.And this oil film pressure distributes 60, in other words is expressed as the zone of peak value for oil film pressure, during with respect to dead load to the sense of rotation 65 skew eccentric angle θ of running shaft 50.

As shown in Figure 4, second liner 31 that is provided in running shaft 50 vertical belows is moved about 10～15 degree (eccentric angle θ=10～15 degree) to the sense of rotation of running shaft 50.In addition, this moving range (eccentric angle) changes significantly according to the gap value between running shaft 50 and each

liner

21,31, thus preferred difference according to the equipment that uses this shaft bearing main body 40, and be adjusted into the optimum position.

Under the situation that eccentric angle increases by this adjustment, as shown in Figure 5, also can will be provided in second liner 31 of running shaft 50 vertical belows, on the sense of rotation of running shaft 50, extend setting.In this case, the surface area that is provided in second liner 31 of running shaft 50 vertical belows increases, in oil film pressure being distributed spread on a large scale.

As mentioned above, by distributing 60 correspondingly and suitably change the equipping position or the size of second liner 31, can between running shaft 50 and second liner 31, form oil film thus fully, and can increase load capacity with oil film pressure.

Journal bearing device 10 according to above-mentioned the 1st mode of execution, by being divided into a plurality ofly on the circumferencial direction of shaft bearing main body 40 inner peripheral surfaces with second liner 31, first liner 21 is provided with, can be provided in the arbitrary position thus, follow the misalignment of running shaft 50 easily.And, first liner 21 and second liner 31 optionally can be configured in load W especially on the inner peripheral surface that significantly acts on the gravitational direction.And,, can adjust the thickness of liner partly by lining 35 is inserted between the back side and bearing portion inner peripheral surface that is divided into first liner 21 that is provided with and/or the regulation liner in second liner 31 a plurality ofly.Thus, can easily carry out the adjustment etc. of bearing play.

And, by being separated predetermined distance and be divided into a plurality ofly with second liner 31 on the circumferencial direction of shaft bearing main body 40 inner peripheral surfaces, first liner 21 is provided with, thus as the flowing of lubricant oil, become and supply to mobile on the liner based on the lubricant oil that flows in the gap between liner.At this, compare the lubricant oil low temperature that on liner, flows at the lubricant oil that flows between the liner, so can often on liner, supply with the lubricant oil of low temperature.So, the lubricant oil of low temperature can be supplied on first liner 21 and second liner 31, be between first liner 21 and second liner 31 and the running shaft 50, therefore can promote the cooling of each liner and shaft bearing week body 40, load capacity is increased.

And first liner 21 and second liner 31 can be made as size arbitrarily, this liner can be configured on the circumferencial direction of shaft bearing main body 40 inner peripheral surfaces.Therefore, even the diameter of running shaft 50 increases, also can irrespectively make journal bearing device 10 with the manufacturing limit of shaft bearing main body 40.And, owing to consider the eccentric angle that oil film pressure distributes, can at random set the equipping position of liner and the surface area of each liner, in oil film pressure being distributed spread on a large scale.Thus, oil film can be formed fully, therefore load capacity can be increased.And first liner 21 and second liner 31 directly are connected on the inner peripheral surface of shaft bearing main body 40 back side of liner and fix, thus the increase of the rigidity of shaft bearing main body 40, also can be corresponding to big load.

(the 2nd mode of execution)

Fig. 6 is the figure of the section vertical with running shaft 50 of the journal bearing device 100 of this 2nd mode of execution of expression.Fig. 7 is the figure of journal bearing device 100 and sections running shaft 50 levels (the B-B section of Fig. 6) of expression the present invention the 2nd mode of execution.Fig. 8 is the figure of the lubricant oil mobility status of the bottom half-bearing portion 30 of expression when (running shaft 50 sides) observe bottom half-bearing portion 30 from the top.The plan view of an example of the shape that Fig. 9 is expression when running shaft 50 sides are observed first liner 21 be provided on shaft bearing main body 40 inner peripheral surfaces and second liner 31.Figure 10 is the figure of the C-C section of presentation graphs 9.In addition, give identical symbol for the component part identical, and omit or the simple explanation that repeats with the journal bearing device 10 of the 1st mode of execution.

As Fig. 6 and shown in Figure 7, journal bearing device 100 is, separates predetermined distance in the axial direction and possesses the liner that the liner row that 2 row are made of a plurality of first liners 21 that predetermined distance spaced apart in the circumferential direction sets on last half bearing portion 20 inner peripheral surfaces in the journal bearing device 10 of the 1st mode of execution and a plurality of second liners 31 that predetermined distance spaced apart in the circumferential direction sets on bottom half-bearing portion 30 inner peripheral surfaces constitute respectively and be listed as.And in each liner row of bottom half-bearing portion 30, in a plurality of second liner 31 1 is configured in below running shaft 50 vertical.In addition, the liner row also can be provided with more than 3 row with separating predetermined distance in the axial direction.

And, represented a following example at this: go up the liner row of second liner 31 of the liner row of first liner 21 of half bearing portion 20 and bottom half-bearing portion 30, in a circumferential direction array, promptly on same circumference, possess row; But be not limited to this and set formation.For example, also can constitute, arranged side by side in a circumferential direction, the liner of promptly going up second liner 31 of the liner row of first liner 21 of half bearing portion 20 and bottom half-bearing portion 30 is listed as, is not provided on the same circumference.And, in last half bearing portion 20 and bottom half-bearing portion 30, be provided with in the axial direction under the situation of a plurality of liners row, also can be the liner number of each liner row different set formation.Particularly, for example also can be that the liner number of liner row of second liner 31 of a side is 3, be 2 and be spaced from the liner number that the opposing party's of predetermined distance ground adjacency the liner of second liner 31 is listed as.So, on the inner peripheral surface of last half bearing portion 20 and bottom half-bearing portion 30, be divided into the formation that sets of the liner that sets a plurality ofly, for example can suitably set accordingly with misalignment etc.

And the predetermined distance between the liner row that are provided with in the axial direction is preferably the degree that lubricant oil can flow in the formed gap between these liner row, waits suitably according to oil body etc. or the temperature conditions that uses and sets.

And, the central shaft of central shaft that shaft bearing main body 40 takes place and running shaft 50 stagger for uneven state be under the situation of misalignment, also can be identical with the situation of the journal bearing device 10 of the 1st mode of execution, between the back side of first liner 21 of regulation and last half bearing portion 20 inner peripheral surfaces and/or between the back side and bottom half-bearing portion 30 inner peripheral surfaces of second liner 31 of stipulating, fix each

liner

21,31 across the lining that works as thin plate, adjust the bearing play.In journal bearing device 100, the multiple row liner can be set in the axial direction, therefore for example can carry out the adjustment of different bearing playes to every row.

Next, with reference to Fig. 8 lubricant oil mobility status in the bottom half-bearing portion 30 of journal bearing device 100 is described.

In Fig. 8, be illustrated in 2 liner row of second liner 31 of vertically going up, on bottom half-bearing portion 30 inner peripheral surfaces, setting predetermined distance spaced apart in the circumferential direction of figure with overlooking.Therefore, second liner 31 that for example below running shaft 50 vertical, sets in second liner 31 shown in Figure 8 from the 2nd second liner 31 of beginning.In addition, lubricant oil is for example from the top of last half bearing portion 20 and supply in the shaft bearing main body 40 between the liner row.

As shown in Figure 8, the lubricant oil that flows in the gap 110 between the liner row becomes main flow 120, shunts on each second liner 31 and the gap of each second liner 31 of each liner row from this main flow 120.And the lubricant oil that is diverted in the gap of each second liner 31 of each liner row also flow on second liner 31.The lubricant oil that flows in main flow 120 is than the lubricant oil low temperature that flows on second liner 31, so can often supply with the lubricant oil of low temperature on second liner 31.In addition, also becoming the lubricant oil identical with the situation of second liner 31 on first liner 21 flows.So, can on first liner 21 and second liner 31, be the lubricant oil of supplying with low temperature between first liner 21 and second liner 31 and the running shaft 50, therefore can promote the cooling of each liner and shaft bearing main body 40, increase load capacity.

And, an example of the shape of first liner 21 and second liner 31 is described with reference to Fig. 9 and Figure 10.

As Fig. 9 and shown in Figure 10, in above-mentioned first liner 21 and second liner 31, lubricant oil 121 flows into the ora terminalis of a side on first liner 21 and second liner 31, be made of plane of inclination 150.This plane of inclination tilts downwards towards the outside of first liner 21 and second liner 31.Be made of plane of inclination 150 by the ora terminalis that so makes lubricant oil 121 flow into a side, lubricant oil 121 can be directed on first liner 21 and second liner 31 swimmingly.In addition, first liner 21 and second liner 31 of the journal bearing device 10 of above-mentioned the 1st mode of execution also can possess the formation of this first liner 21 and second liner 31.

Journal bearing device 100 according to above-mentioned the 2nd mode of execution, by running shaft 50 axially on separate predetermined distance ground and possess the liner that a plurality of second liners 31 that liner that multiple row is made of a plurality of first liners 21 of predetermined distance spaced apart in the circumferential direction ground configuration on the inner peripheral surface of last half bearing portion 20 is listed as and disposed by predetermined distance spaced apart in the circumferential direction ground on the inner peripheral surface of bottom half-bearing portion 30 constitute and be listed as, can be easily and correctly carry out the adjustment etc. of bearing play.

And the lubricant oil that flows in the gap 110 between the liner row becomes main flow 120, the lubricant oil of low temperature can be directed on first liner 21 and second liner 31 from these main flow 120 shuntings, therefore can carry out the cooling of liner and bearing effectively.Can realize the load capacity increase of journal bearing device 100 etc. thus.And, by constitute lubricant oil flows into a side on first liner 21 and second liner 31 ora terminalis by plane of inclination 150, lubricant oil is directed on first liner 21 and second liner 31 swimmingly thus, can further improve the cooling effectiveness of above-mentioned liner.

And first liner 21 and second liner 31 can be made as size arbitrarily, and this liner can be provided on the circumferencial direction of shaft bearing main body 40 inner peripheral surfaces.Therefore, even the diameter of running shaft 50 increases, also can irrespectively make journal bearing device 100 with the manufacturing limit of shaft bearing main body 40.And, consider the eccentric angle that oil film pressure distributes, can at random set the equipping position of liner and the surface area of each liner, so in oil film pressure being distributed spread on a large scale.Can form oil film fully thus, so can increase load capacity.And first liner 21 and second liner 31 directly are connected on the inner peripheral surface of shaft bearing main body 40 back side of liner and fix, thus the increase of the rigidity of shaft bearing main body 40, also can be corresponding to big load.

In addition, the present invention is not limited to above-mentioned mode of execution itself, the implementation phase in the scope that does not break away from its purport, can be out of shape and specialize constituting component.And,, can form various inventions by the disclosed a plurality of constituting components of above-mentioned mode of execution are carried out appropriate combination.For example, also can from the whole constituting components shown in the mode of execution, delete several constituting components.And, the constituting component in also can the appropriate combination different mode of executions.

The industry utilizability

According to the journal bearing device of mode of the present invention, by with first liner and second liner at axle Be divided into a plurality ofly on the circumferencial direction of journal bearing main body inner peripheral surface and arrange, can be at an arbitrary position to appoint The meaning size sets. Therefore, follow easily the misalignment of rotating shaft. And, consider the oil film pressure The eccentric angle that power distributes can at random be set the equipping position of liner and the surface area of each liner, So can make in oil film pressure distribution spreads on a large scale. Thus, can fully form oil film, institute Can increase load capacity. The journal bearing device of mode of the present invention is for example effectively as major diameter The bearing of the rotating shaft of changing.

Claims

1, a kind of journal bearing device possessing first liner on the half bearing on the bearing of supporting rotating shaft, possess second liner on bottom half-bearing, is characterized in that,

Circumferencial direction along above-mentioned bottom half-bearing inner peripheral surface is equipped with a plurality of above-mentioned second liners with separating predetermined distance, 1 vertical below that is provided in running shaft in these a plurality of second liners.

2, a kind of journal bearing device possessing first liner on the half bearing on the bearing of supporting rotating shaft, possess second liner on bottom half-bearing, is characterized in that,

Above-mentioned running shaft axially on separate predetermined distance ground and possess the multiple row liner and be listed as, in this each liner row in a plurality of second liners 1 is configured in below running shaft vertical, and these liner row are that the circumferencial direction along above-mentioned bottom half-bearing inner peripheral surface is equipped with a plurality of above-mentioned second liners with separating predetermined distance and forms.

3, as the journal bearing device of claim 1 record, it is characterized in that,

The surface of above-mentioned at least second liner is formed by thermoplastic resin material.

4, as the journal bearing device of claim 2 record, it is characterized in that,

5, as the journal bearing device of claim 1 record, it is characterized in that,

The surface of above-mentioned at least second liner forms by containing thermoplastic resin material at least a in ceramic fiber, molybdenum disulfide particle or the graphite particle.

6, as the journal bearing device of claim 2 record, it is characterized in that,

7, as the journal bearing device of claim 1 record, it is characterized in that,

The surface of above-mentioned first liner is formed by softer metals.

8, as the journal bearing device of claim 2 record, it is characterized in that,

The surface of above-mentioned first liner is formed by softer metals.

9, as the journal bearing device of claim 1 record, it is characterized in that,

Above-mentioned first liner and above-mentioned second liner can be provided with loading and unloading.

10, as the journal bearing device of claim 2 record, it is characterized in that,

11, as the journal bearing device of claim 1 record, it is characterized in that,

Between above-mentioned first liner and last half bearing inner peripheral surface of regulation, can fix above-mentioned first liner across thin plate.

12, as the journal bearing device of claim 2 record, it is characterized in that,

13, as the journal bearing device of claim 1 record, it is characterized in that,

Between above-mentioned second liner and bottom half-bearing inner peripheral surface of regulation, can fix above-mentioned second liner across thin plate.

14, as the journal bearing device of claim 2 record, it is characterized in that,

15, as the journal bearing device of claim 1 record, it is characterized in that,

In above-mentioned first liner, the ora terminalis that makes lubricant oil flow into a side on the surface of above-mentioned first liner at least is made of the plane of inclination.

16, as the journal bearing device of claim 2 record, it is characterized in that,

17, as the journal bearing device of claim 1 record, it is characterized in that,

In above-mentioned second liner, the ora terminalis that makes lubricant oil flow into a side on the surface of above-mentioned second liner at least is made of the plane of inclination.

18, as the journal bearing device of claim 2 record, it is characterized in that,