CN101641525B

CN101641525B - Journal bearing device

Info

Publication number: CN101641525B
Application number: CN2008800098799A
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: 2013-06-05
Anticipated expiration: 2028-03-27
Also published as: BRPI0809625B1; BRPI0809625A2; JP5197977B2; WO2008126362A1; KR20090114460A; JP2008240962A; CN101641525A

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.

The shaft bearing that rotating machinery uses is assembled as, the central shaft of bearing and the central axes of running shaft.But, when rotated due to the direction of load or the distortion of running shaft etc., the central shaft that sometimes produces the central shaft of bearing and running shaft stagger for uneven state be misalignment.And, when rotation during load, sometimes for example produce the cone shape whirling take the intersection point of the central shaft of the central shaft of bearing and running shaft as the summit.In becoming this during operating condition, may the damage (friction burn) that one end in contact cause occur 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 means the figure of the profile construction of existing journal bearing device.

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, in the situation that an end in contact of sliding axle 323 occurs, also the wearing and tearing of anti-skidding axle 323 and friction burn, can use as large size bearing.And, in TOHKEMY 2001-173659 communique, following technology being disclosed: in elliptic bearing, removing on a part of 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 to circumferencial direction and axioversion, can easily follow the inclination of running shaft 333 by pivot 332 supports such as grade.

As mentioned above, in existing journal bearing device, prevent the technology of damage of the bearing although the running shaft when having proposed to follow running tilts, also have following problem.

The problem that exists in journal bearing device shown in Figure 11 is, in the situation that the load that bearing is loaded is larger, the frictional force between sphere is excessive, and bearing is difficult to tilt, the tracing ability variation.Therefore, when the misalignment amount increases, rotate an end in contact of axle and bearing, (friction burn) 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 slip surface becomes.When not forming lubricant film, the abnormal temperature that frictional heat causes occurs to rise, sliding layer is deteriorated due to the heat resisting temperature that surpasses resin, sometimes the Surface Contact of running shaft and bearing and injury.And, in elliptic bearing, in the situation that removing on a part of zone in addition on the bearing slip surface arranges sliding layer, the problem that exists is, it is large 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 in the situation that be used as the such high loading of large capacity bulb hydraulic turbine generator, the bearing that the slow-speed of revolution is used, exist to be difficult to bring into play the problem of original self-aligning for the inclination of running shaft due to load.And also there are the following problems: load performance is poorer than cylinder type bearing because slip surface is split into a plurality of, is difficult to form enough lubricant films, and it is very large 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

Therefore, the object of the present invention is to provide a kind of journal bearing device, even in large load, slow-revving situation, also can prevent 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, possesses first liner that can load and unload on the upper half bearing of the bearing of supporting rotating shaft, and possesses second liner that can load and unload on bottom half-bearing, 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 with separating predetermined distance, these a plurality of second liners have the surface of the radius of curvature larger than the radius of above-mentioned running shaft, the back side of these a plurality of second liners is whole to be fixed with the direct butt of above-mentioned bottom half-bearing inner peripheral surface, 1 vertical below that is configured in running shaft in these a plurality of second liners, above-mentioned first liner of regulation with above-mentioned on can fix across thin plate above-mentioned first liner between the half bearing inner peripheral surface, can fix across thin plate above-mentioned second liner between above-mentioned second liner of stipulating and above-mentioned bottom half-bearing inner peripheral surface.

and, according to a mode of the present invention, a kind of journal bearing device is provided, possesses first liner that can load and unload on the upper half bearing of the bearing of supporting rotating shaft, and possesses second liner that can load and unload on bottom half-bearing, 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 predetermined distance ground a plurality of above-mentioned second liners of configuration along the circumferencial direction of the inner peripheral surface of above-mentioned bottom half-bearing and form, these a plurality of second liners have the surface of the radius of curvature larger than the radius of above-mentioned running shaft, the back side of these a plurality of second liners is whole to be fixed with the direct butt of above-mentioned bottom half-bearing inner peripheral surface, above-mentioned first liner of regulation with above-mentioned on can fix across thin plate above-mentioned first liner between the half bearing inner peripheral surface, can fix across thin plate above-mentioned second liner between above-mentioned second liner of stipulating and above-mentioned bottom half-bearing inner peripheral surface.

Fig. 1 means the figure of the section vertical with running shaft of the journal bearing device of the present invention's the 1st mode of execution.

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

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

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

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

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

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

Fig. 8 means the figure of the lubricating oil flow situation of the bottom half-bearing section when observing bottom half-bearing section from the top.

Fig. 9 means the plan view of an example of the shape when observing first liner on the inner peripheral surface be configured in the shaft bearing main body and second liner from rotation shaft side.

Figure 10 means the figure of the C-C section of Fig. 9.

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

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

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

Symbol description

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

Embodiment

Below, illustrate referring to the drawings an embodiment of the invention.

(the 1st mode of execution)

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

As shown in Figure 1, journal bearing device 10 constitutes, possess by at first bearing portion 20 that possesses first liner 21 on inner peripheral surface with possess the shaft bearing main body 40 that the bottom half-bearing section 30 of second liner 31 consists of on inner peripheral surface, and by first liner 21 and second liner 31 supporting rotating shafts 50.First 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 part, and bottom half-bearing section 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 first bearing portion 20 with separating predetermined distance, and second liner 31 sets along circumferencial direction on the inner peripheral surface of bottom half-bearing section 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 first bearing portion 20 and bottom half-bearing section 30.1 vertical below that is configured in running shaft 50 in a plurality of second liners 31 that configure.And, first liner 21 and second liner 31 especially preferred disposition on the inner peripheral surface of radial direction load remarkable effect.By so configuring first liner 21 and second liner 31, even be in large load, slow-revving situation at running shaft 50, when gravitational direction load W increases the earth rotation, also can guarantee sufficient load capacity.In addition, so-called load capacity refers to the maximum load that can be supported by this bearing herein.

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 large some curvature of radius than running shaft 50.

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

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 consists of

surface layer

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

So, by formed the surface of first liner 21 and second liner 31 by resin material, the situation that is used as the surface with the softer metals that will use 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 thus good wearability, therefore when the startup of running shaft 50, even at oil slick thickness under the thinner 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 consists of 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, such as enumerating white metal etc.In the situation that so softer metals is used as surface layer, can be suitable for the manufacture method of existing bearing bush, therefore can realize the reduction of manufacture cost.And, in second liner 31, in the situation that be configured on the less inner peripheral surface of radial direction load, also can be consisted of by softer metals such as white metals the surface layer 31a of second liner 31.

At this, in the situation that the central shaft of shaft bearing main body 40 occurs and the central shaft of running shaft 50 staggers for uneven state is misalignment, sometimes produce the cone shape whirling take the intersection point of the central shaft of the central shaft of shaft bearing main body 40 and running shaft 50 as the summit.For fear of this state, also can be between between the back side and first bearing portion 20 inner peripheral surfaces of first liner 21 of regulation and/or the back side of second liner 31 of stipulating and bottom half-bearing section 30 inner peripheral surfaces, 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 allocation position or the increase and decrease liner quantity of first liner 21, second liner 31, and suppress above-mentioned whirling.Lining is such as consisting of by the thin plate that formed by steel such as common steel or stainless steels or paper tinsel etc.

At this, the situation that will be fixed across lining 35 between the back side of second liner 31 and bottom half-bearing section 30 inner peripheral surfaces describes as an example.As shown in Figure 3, second liner 31 is, by for example by the outer circumferential side of screw 37 from bottom half-bearing section 30, fixed component 36 being fixed, is fixed to thus on bottom half-bearing section 30 inner peripheral surfaces.In the situation that between the back side of second liner 31 and bottom half-bearing section 30 inner peripheral surfaces across thin plate, at first pull down fixed component 36, and lining 35 inserted between the back side and bottom half-bearing section 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 state on 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 section 30 inner peripheral surfaces can.Also fix by the method identical with second liner 31 for first liner 21.

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 mean the figure of the 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 first bearing portion 20 and supply in shaft bearing main body 40 between 2 first liners 21.

Usually, in journal bearing device 10, when running shaft 50 rotation, by form the oil film of lubricant oil between journal bearing device 10 and running shaft 50, 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 distribution 60, in other words be 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, make second liner 31 of being provided in running shaft 50 vertical belows move 10～15 degree (eccentric angle θ=10～15 degree) left and right 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 the difference of preferred equipment according to using this shaft bearing main body 40, and be adjusted into the optimum position.

In 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, extend setting on the sense of rotation of running shaft 50.In this case, the surface area that is provided in second liner 31 of running shaft 50 vertical belows increases, and can make in oil film pressure distribution spreads on a large scale.

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

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 arranges, can be provided in the arbitrary position thus, easily follow the misalignment of running shaft 50.And, first liner 21 and second liner 31 optionally can be configured in load W especially on the inner peripheral surface of remarkable effect on gravitational direction.And, by lining 35 is inserted between the back side and bearing portion inner peripheral surface that is divided into first liner 21 of arranging and/or the regulation liner in second liner 31 a plurality ofly, can adjust partly the thickness of liner.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 arranges, thus as the flowing of lubricant oil, become the lubricant oil that flows in the gap between liner and supply to flowing on liner as main.At this, at the lubricant oil that flows between liner than the lubricant oil low temperature that flows on liner, so supply with the lubricant oil of low temperature on can the Chang Shixiang liner.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 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, due to the eccentric angle of considering oil film pressure distribution, can at random set the equipping position of liner and the surface area of each liner, therefore can make in oil film pressure distribution spreads 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 large load.

(the 2nd mode of execution)

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

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

And, represented a following example at this: the liner row of second liner 31 of the liner of first liner 21 of first bearing portion 20 row and bottom half-bearing section 30, in a circumferential direction array, namely possess row on same circumference; But be not limited to this and set formation.For example, also can constitute, arranged side by side in a circumferential direction, namely the liner of second liner 31 of the liner of first liner 21 of first bearing portion 20 row and bottom half-bearing section 30 is listed as, is not provided on same circumference.And, in first bearing portion 20 and bottom half-bearing section 30, arrange in the axial direction in the situation of a plurality of liners row, can be also the liner number of each liner row different set formation.Particularly, can be also for example 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, be divided into the formation that sets of the liner that sets on the inner peripheral surface of first bearing portion 20 and bottom half-bearing section 30, such as can suitably setting accordingly with misalignment etc. a plurality ofly.

And the predetermined distance between the liner row that arrange in the axial direction is preferably the degree that lubricant oil can flow in formed gap between these liner row, suitably sets according to the temperature conditions of oil body etc. or use etc.

And, in the situation that occur the central shaft of the central shaft of shaft bearing main body 40 and running shaft 50 stagger for uneven state be misalignment, also can be identical with the situation of the journal bearing device 10 of the 1st mode of execution, between between the back side and first bearing portion 20 inner peripheral surfaces of first liner 21 of regulation and/or the back side of second liner 31 of stipulating and bottom half-bearing section 30 inner peripheral surfaces, 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 to every row the adjustment of different bearing playes.

Next, with reference to Fig. 8, lubricating oil flow situation in the bottom half-bearing section 30 of journal bearing device 100 is described.

In Fig. 8, vertically 2 liners of second liner 31 upper, that predetermined distance spaced apart in the circumferential direction ground sets on bottom half-bearing section 30 inner peripheral surfaces that are illustrated in figure are listed as with overlooking.Therefore, second liner 31 that for example sets below running shaft 50 vertical in second liner 31 shown in Figure 8 from the 2nd second liner 31 of beginning.In addition, lubricant oil for example supplies in shaft bearing main body 40 from the top of first bearing portion 20 and 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 supply with the lubricant oil of low temperature on can second liner 31 of Chang Shixiang.In addition, also become the lubricating oil flow identical with the situation of second liner 31 on first liner 21.So, can be on first liner 21 and second liner 31, be to supply with the lubricant oil of low temperature between first liner 21 and second liner 31 and 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, is 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 the liner that predetermined distance ground possesses liner row that multiple row is made of a plurality of first liners 21 in predetermined distance spaced apart in the circumferential direction ground configuration on the inner peripheral surface of first bearing portion 20 and a plurality of second liners 31 of being configured by predetermined distance spaced apart in the circumferential direction ground on the inner peripheral surface of bottom half-bearing section 30 consist of 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 effectively carry out the cooling of liner and bearing.Can realize thus the load capacity increase of journal bearing device 100 etc.And, flow into the ora terminalis of a side on first liner 21 and second liner 31 by consisted of lubricant oil 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 of oil film pressure distribution, can at random 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.Can form fully oil film 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 large load.

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

The industry utilizability

According to the journal bearing device of mode of the present invention, by being divided into a plurality ofly on the circumferencial direction of shaft bearing main body inner peripheral surface, first liner and second liner arrange, can set with arbitrary dimension at an arbitrary position.Therefore, easily follow the misalignment of running shaft.And, consider the eccentric angle of oil film pressure distribution, can at random 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, so can increase load capacity.The journal bearing device of mode of the present invention for example effectively is used as the bearing of the running shaft of ever-larger diameters.

Claims

1. journal bearing device possesses first liner that can load and unload and possess second liner that can load and unload on bottom half-bearing on the upper half bearing of the bearing of supporting rotating shaft, it 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, these a plurality of second liners have the surface of the radius of curvature larger than the radius of above-mentioned running shaft, the back side of these a plurality of second liners is whole to be fixed with the direct butt of above-mentioned bottom half-bearing inner peripheral surface, 1 vertical below that is provided in running shaft in these a plurality of second liners

Above-mentioned first liner of regulation with above-mentioned on can be across thin plate between the half bearing inner peripheral surface and fixing above-mentioned first liner, can fix across thin plate above-mentioned second liner between above-mentioned second liner of regulation and above-mentioned bottom half-bearing inner peripheral surface.

2. journal bearing device possesses first liner that can load and unload and possess second liner that can load and unload on bottom half-bearing on the upper half bearing of the bearing of supporting rotating shaft, it is characterized in that,

Above-mentioned rotating 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 rotating shaft vertical, this 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, these a plurality of second liners have the surface of the radius of curvature larger than the radius of above-mentioned rotating shaft, the back side of these a plurality of second liners is whole to be fixed with the direct butt of above-mentioned bottom half-bearing inner peripheral surface

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 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,

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

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

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

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

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