CN209524004U - A kind of thrust bearing of turbocharger - Google Patents

Abstract

The utility model discloses a kind of thrust bearing of turbocharger, thrust bearing includes a thrust sleeve, the two sides of thrust sleeve are respectively set first, second thrust bearing, first, second thrust bearing working face corresponding with thrust sleeve is equipped with oil film wedge face, the two sides working face of thrust sleeve is thrust face, thrust sleeve is equipped with radial and axial oil holes, it is interconnected between radial direction oil hole and axial oilhole, so that the lubricating oil into thrust sleeve passes through radial direction oil hole, oil back chamber is converged to after axial oilhole and the thrust face of thrust sleeve two sides, to solve the Leakage of pressure impeller side.Simultaneously under the influence of centrifugal force, so that the flow of lubrication by thrust face increases, the operating temperature of thrust face when high revolving speed can be effectively reduced as the revolving speed of turbocharger improves, axial carrying capacity is improved.

Description

A kind of thrust bearing of turbocharger

Technical field

The utility model relates generally to the technical field of turbocharger, in particular to a kind of thrust of turbocharger Bearing arrangement more particularly to a kind of thrust bearing from oil inlet on the inside of thrust sleeve.

Background technique

Technology for Turbocharger Manufacturing can effectively improve the power density of engine, reduce complete vehicle weight, improve fuel oil warp Ji property, plays an important role to the energy-saving and emission-reduction of automobile.As energy problem is increasingly urgent tight with adding for emission regulation, turbine increases Depressor technology is gradually popularized on a large scale.Vehicular engine dynamic property, economy, exhaust gas discharge and in terms of It is required that continuous improvement, higher challenge is proposed to technology for Turbocharger Manufacturing.

The exhaust gas of engine blows turbine, is rotated by main shaft band dynamic pressure impeller, so that compressed air is sent into engine It is interior.Typical turbocharger bearing system arrangement is as shown in Figure 1, arrow is the path schematic diagram of lubricating oil flow in figure.Fig. 1 In only depict the bearing arrangement part of turbocharger.In order to facilitate statement, bearing arrangement is divided into thrust bearing division herein Divide and transverse bearing part.Wherein turbine, main shaft, Thurst washer, thrust sleeve, pressure impeller and locking nut together constitute rotor System.Thurst washer, thrust sleeve and thrust bearing constitute thrust bearing part, to bear the axial force of rotor-support-foundation system.It is main Axis, transverse bearing and intermediate constitute transverse bearing part, to bear the radial force of rotor-support-foundation system.Turbocharger operation When, turbine will drive entire rotor-support-foundation system high speed rotation, and two transverse bearings in Fig. 1 rotate under the drive of lubricating oil, Remaining part stationary is motionless.Lubricating oil is divided into 3 tunnels after entering intermediate: the lubricating oil of the leftmost side is by the oilhole on thrust bearing The thrust face for entering thrust bearing two sides afterwards, is lubricated and cools down to thrust bearing part；Intermediate and right side lubrication oil Not Jing Guo the oilhole on intermediate enter the inside and outside oil film faces of two transverse bearings, to radial bearing portions be lubricated with it is cold But.

Thrust bearing part is further described in detail in Fig. 2, on the left of the inner hole and Thurst washer of thrust bearing Lesser external cylindrical surface forms an annular oil pocket.Oil film wedge face is provided at left and right sides of thrust bearing, respectively at thrust sleeve and The corresponding plane of Thurst washer forms two thrust faces.The lubricating oil of the leftmost side enters annular oil by the oilhole on thrust bearing Then chamber enters oil back chamber by two thrust faces in left and right.The revolving speed of turbocharger is very high, since rubbing action can be in thrust Amount of heat is generated on face, lubricating oil plays the role of lubrication and cooling to thrust face.About the working principle of thrust bearing, in whirlpool It takes turns in the pertinent literature of booster and has had a detailed description.Since a large amount of lubricating oil are flowed out by left side thrust face, to prevent from lubricating Oil leaks into pressure impeller side, is provided with oil guide plate in Fig. 2 and lubricating oil is imported oil back chamber.But still there is parts of lubricating oil can be by leading Gap between oiled-plate method and thrust sleeve enters between backboard and oil guide plate, and then passes through the clearance leakage at piston ring to pressure impeller The risk of leakage of side, lubricating oil is very high.

Meanwhile the thrust bearing of the prior art, the flow of lubrication by thrust face are by input pressure and lubrication The flow resistance of oil determines, unrelated with the revolving speed of turbocharger (or relationship is smaller).When supercharger speed is higher, thrust face Operating temperature increase, cause lubricating oil viscosity to reduce, the axial force reduction that turbocharger is able to bear.

Further, the thrust bearing of the prior art needs to punch on thrust bearing, in some instances it may even be possible to need more complicated Structure, manufacturing cost is higher.

Summary of the invention

The utility model passes through change in view of the above-mentioned problems, provide a kind of thrust bearing of turbocharger The first, second thrust bearing is respectively set in the two sides of thrust sleeve in the structure of thrust sleeve, while thrust sleeve is equipped with oilhole, solves The Leakage of pressure impeller side.

The purpose of this utility model can be realized by following technical proposals: a kind of thrust bearing of turbocharger Structure, thrust bearing are set in rotor-support-foundation system, and to bear the axial force of rotor-support-foundation system, rotor-support-foundation system is equipped with oil inlet And oil back chamber, which is characterized in that thrust bearing includes a thrust sleeve, and the two sides of thrust sleeve are respectively set first, second Thrust bearing, the first, second thrust bearing working face corresponding with thrust sleeve are equipped with oil film wedge face, and the two sides working face of thrust sleeve is Thrust face, thrust sleeve are equipped with radial and axial oil holes, interconnect between radial direction oil hole and axial oilhole, so that into pushing away The lubricating oil of power set converges to oil back chamber after the thrust face of radial direction oil hole, axial oilhole and thrust sleeve two sides.

Preferably, the one side of the first thrust bearing is equipped with the first oil film wedge face and oil-recovery tank, oil film wedge face and axial oil hole location In same radial position, the first thrust bearing is in the form of annular discs, and the center is equipped with through-hole, to be set on thrust sleeve, first Oil film wedge face along through-hole circumferential directions；The another side of first thrust bearing is to get rid of pasta, gets rid of pasta and thrust sleeve Periphery, backboard, which are formed together, gets rid of oil pocket, and periphery is equipped with and gets rid of the thrust sleeve that pasta matches and get rid of oil groove.

Further, the first oil film wedge face is fan-shaped or annular shape in the shape on continuous perhaps intermittent convex surface convex surface, second The side of thrust bearing be equipped with the first oil film wedge face corresponding second oil film wedge face, the second oil film wedge face be it is continuous or intermittent convex Face, the shape on convex surface are fan-shaped or circular.

Further, thrust sleeve includes cylindric sleeve part and circular Oil Guide portion, is equipped with multiple groups two-by-two in Oil Guide portion The radial and axial oil holes of pairing, the angle of intersection between radial direction oil hole and axial oilhole are 45-135 degree；Rotor-support-foundation system In be equipped with main shaft, be arranged with transverse bearing on main shaft, thrust sleeve, the second thrust bearing, main shaft and transverse bearing enclose shape jointly At the first oil pocket, radial direction oil hole is connected with the first oil pocket.

Further, it is square groove, arc groove or triangular groove that thrust sleeve, which gets rid of oil groove,.Oil Guide portion is equipped with 2-10 group two The radial and axial oil holes of two pairings, these radial and axial oil holes are circumferentially uniformly distributed, radial direction oil hole and Axial oilhole is round oilhole, oval oilhole, semicircle oilhole or rectangular oilhole.

Compared with the existing technology, the technical solution of the utility model further includes many in addition to the improvement of overall technical architecture Improvement in terms of details, specifically, having the advantages that

1, improvement project described in the utility model is respectively set the first, second thrust bearing in the two sides of thrust sleeve, pushes away It is thrust face that power, which is placed on the corresponding two sides working face of the first, second thrust bearing, and thrust sleeve is equipped with radial and axial oil holes, So that the lubricating oil into thrust sleeve converges to oil return after the thrust face of radial direction oil hole, axial oilhole and thrust sleeve two sides Chamber, so that the first thrust bearing only has seldom outflow of lubrication oil close to pressure impeller side, to solve the leakage of pressure impeller side Oily problem；

2, in the technical solution of the utility model, the first, second thrust bearing working face corresponding with thrust sleeve is equipped with oil Wedge surface, oil film wedge face are fan-shaped or annular shape in the shape on continuous perhaps intermittent convex surface convex surface, under the influence of centrifugal force, So that the flow of lubrication by thrust face increases as the revolving speed of turbocharger improves, when high revolving speed can be effectively reduced The operating temperature of thrust face improves axial carrying capacity；

3, first, second thrust bearing of the utility model only single side face be equipped with oil film wedge face, do not need overpunch or Oil circuit is set, manufacturing cost is reduced；

4, in the technical program, the another side of the first thrust bearing is to get rid of pasta, get rid of pasta and thrust sleeve periphery, Backboard, which is formed together, gets rid of oil pocket, and periphery is equipped with and gets rid of the thrust sleeve that pasta matches and get rid of oil groove so that it is a small amount of enter get rid of pasta Lubricating oil, pass through when getting rid of oil groove of thrust sleeve, be dumped into and get rid of in oil pocket, eventually enter into oil back chamber；

5, the delicate structure of the utility model, connection and reasonable arrangement, easy making process are easily installed and use, and using effect is outstanding, Conducive to promotion and application.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the prior art.

Fig. 2 is the partial enlargement diagram of the prior art.

Fig. 3 is the structural schematic diagram of an embodiment of the present invention.

Fig. 4 is the thrust sleeve of the utility model and the enlarged structure schematic diagram of the first, second thrust bearing cooperation.

Fig. 5 is the cross-sectional view of the thrust sleeve of an embodiment of the present invention.

Fig. 6 is the first thrust bearing schematic diagram of an embodiment of the present invention.

Fig. 7 is the second thrust bearing schematic diagram of an embodiment of the present invention.

Fig. 8 is the structural schematic diagram of another embodiment of the utility model.

Fig. 9 is the cross-sectional view of the thrust sleeve of another embodiment of the utility model.

It is marked in figure as follows:

1 thrust sleeve, 2 first thrust bearings, 3 second thrust bearings, 4 main shafts, 5 intermediates, 6 pressure impellers, 7 heat shields, 8 whirlpools Wheel, 9 oil back chambers, 10 positioning pins；

11 radial direction oil holes, 12 axial oilholes, 13 thrust sleeves get rid of oil groove, 14 sleeve parts, 15 Oil Guide portions, 16 left side thrust faces, 17 right side thrust faces, 18 piston rings；

21 first oil film wedge faces, 22 bolts hole, 23 oil-recovery tanks；

31 second oil film wedge faces；

41 first oil pockets；

51 transverse bearings；

61 locking nuts, 62 backboards, 621 0 type circles.

Specific embodiment

Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing, becomes apparent from those skilled in the art How ground understanding practices the utility model.Although describing the utility model in conjunction with its preferred embodiment, these Embodiment only illustrates, rather than limits the scope of the utility model.

As shown in figure 3, a kind of thrust bearing of turbocharger, thrust bearing are set to rotor-support-foundation system In, to bear the axial force of rotor-support-foundation system, main shaft 4, transverse bearing 51, positioning pin and intermediate 5 constitute radial bearing portion Point, to bear the radial force of rotor-support-foundation system, rotor-support-foundation system is equipped with oil inlet and oil back chamber 9, and difference with the prior art exists It include a thrust sleeve 1 in, thrust bearing, the two sides of thrust sleeve are respectively set the first, second thrust bearing 2,3, first, Second thrust bearing working face corresponding with thrust sleeve is equipped with oil film wedge face, and the two sides working face of thrust sleeve is thrust face, thrust sleeve Equipped with radial and axial oil holes, interconnected between radial direction oil hole and axial oilhole, so that into the lubricating oil of thrust sleeve Oil back chamber is converged to after the thrust face of radial direction oil hole, axial oilhole and thrust sleeve two sides, is located at the of the two sides of thrust sleeve One, the second thrust bearing position is just corresponding with the position of axial oilhole, and axial oilhole extends transversely through the Oil Guide portion of thrust sleeve simultaneously And set there are two axial oilhole oil outlet, the position of two axial oilhole oil outlets respectively with the first, second thrust bearing the One oil film wedge face 21,31 position of the second oil film wedge face are corresponding.

The another side of first thrust bearing is to get rid of pasta, and oil film wedge face and axial oil hole are located at same radial position, get rid of oil The periphery of face and thrust sleeve, backboard, which are formed together, gets rid of oil pocket, and periphery is equipped with and gets rid of the thrust sleeve that pasta matches and get rid of oil groove, It is square groove, arc groove or triangular groove that thrust sleeve, which gets rid of oil groove,.Thrust sleeve includes cylindric sleeve part and annular shape Oil Guide portion is equipped with the radial and axial oil holes that multiple groups are matched two-by-two in Oil Guide portion, between radial direction oil hole and axial oilhole Angle of intersection is 45-135 degree；It is equipped with main shaft in rotor-support-foundation system, is arranged with transverse bearing, thrust sleeve, the second thrust axis on main shaft Hold, main shaft and transverse bearing are enclosed the first oil pocket 41 jointly, radial direction oil hole is connected with the first oil pocket 41.

When it is implemented, thrust sleeve rotates together with main shaft, the lubricating oil in the first oil pocket is in centrifugal force and input pressure Under the action of, enter the thrust face at left and right sides of thrust sleeve by the radial direction oil hole 11 and axial oilhole 12 of thrust sleeve, then into Enter oil back chamber.There is a small amount of lubricating oil to enter the first thrust by the radial clearance between the first thrust bearing and thrust sleeve simultaneously The left side of bearing, this parts of lubricating oil are passing through when getting rid of oil groove of thrust sleeve, the oil pocket being dumped between backboard and thrust bearing It is interior, eventually enter into oil back chamber.

In one embodiment, the utility model can be used on the full floating transverse bearing in similar Fig. 1, can also be with Using on semifloating transverse bearing, as shown in figure 3, be typical semifloating transverse bearing, lubricating oil by intermediate into The oilhole of oilhole and positioning pin enters the inner ring of transverse bearing, then enters transverse bearing by the oilhole of transverse bearing lower part Outer ring.The lubricating oil of transverse bearing inner ring and outer ring, a part enter oil back chamber from right side, another part enter thrust sleeve, In the first oil pocket that second thrust bearing, main shaft and transverse bearing are collectively formed, then using the radial direction oil hole of thrust sleeve and Axial oilhole enters the thrust face of the left and right sides.Lubricating oil finally flows radially out thrust face, and converges to oil back chamber.

Specifically, thrust sleeve includes cylindric sleeve part and circular Oil Guide portion, and 4 groups are equipped in Oil Guide portion two-by-two The radial and axial oil holes of pairing, these radial and axial oil holes are circumferentially uniformly distributed, radial direction oil hole and axis Be 90 degree to the angle of intersection between oilhole, that is, intersect vertically, the benefit to intersect vertically be so that lubricating oil uniformly axially The both ends oil outlet of oilhole overflows, and the flow of lubrication by thrust face is determined by the flow resistance of input pressure and lubricating oil Fixed, related with the revolving speed of turbocharger, when supercharger speed is higher, flow of lubrication is mentioned with the revolving speed of turbocharger It is high and increase.The operating temperature of thrust face when high revolving speed can be effectively reduced improves axial carrying capacity.

As shown in figure 4, being respectively arranged with oil film wedge face on the left of the right side of the first thrust bearing and the second thrust bearing, respectively Left side thrust face and right side thrust face are formed in the corresponding plane of thrust sleeve.Thrust sleeve, the second thrust bearing, main shaft and radial axle It holds and together forms the first oil pocket.Thrust sleeve rotates together with main shaft, and the lubricating oil in the first oil pocket is in centrifugal force and oil inlet pressure Under the action of power, enter the thrust face at left and right sides of thrust sleeve by the radial and axial oil holes of thrust sleeve, subsequently into Oil back chamber.There is a small amount of lubricating oil to enter the first thrust axis by the radial clearance between the first thrust bearing and thrust sleeve simultaneously The left side held, this parts of lubricating oil are passing through when getting rid of oil groove of thrust sleeve, are being dumped between backboard and thrust bearing and get rid of oil pocket It is interior, oil back chamber is eventually entered into, thoroughly solves the Leakage of pressure 6 side of impeller, while extending thrust sleeve and first, second and pushing away The service life of power bearing.

In another embodiment, referring to Fig. 8, Fig. 9, thrust sleeve includes cylindric sleeve part and circular Oil Guide Portion is equipped with 8 groups of radial and axial oil holes matched two-by-two in Oil Guide portion, these radial and axial oil holes are circumferentially It is uniformly distributed, the angle of intersection between radial direction oil hole and axial oilhole is 75 degree, i.e. inclination intersection, this inclination intersection, not only Refer to tilt between radial direction oil hole and axial oilhole and intersect, while also being provided with an inclination angle between radial direction oil hole and horizontal plane Degree, the range of this tilt angle are 65-85 degree, and the benefit being obliquely installed is when thrust sleeve rotation, and lubrication oil flow rate also can Accelerate, it is easier to enter on the thrust face of left and right from the outflow of axial oilhole, the work temperature of thrust face when high revolving speed can be effectively reduced Degree improves axial carrying capacity.Specifically, be equipped with main shaft in rotor-support-foundation system, it is arranged with transverse bearing on main shaft, thrust sleeve, Second thrust bearing, main shaft and transverse bearing are enclosed the first oil pocket jointly, and radial direction oil hole is connected with the first oil pocket.

The one side of first thrust bearing is equipped with the first oil film wedge face 21 and oil-recovery tank 23, and the first thrust bearing is in the form of annular discs, The center be equipped with through-hole, to be set on thrust sleeve, the first oil film wedge face along through-hole circumferential directions.Here One, the second thrust bearing is only equipped with oil film wedge face in single side face, does not need overpunch or setting oil circuit, reduces manufacturing cost.

Meanwhile first thrust bearing another side be get rid of pasta, get rid of pasta shape together with the periphery of thrust sleeve, backboard At getting rid of oil pocket, periphery is equipped with and gets rid of the thrust sleeve that pasta matches and get rid of oil groove.Here it is arc groove that thrust sleeve, which gets rid of oil groove,.Work When making, thrust sleeve rotates together with main shaft, and the lubricating oil in the first oil pocket is under the action of centrifugal force and input pressure, by pushing away The inclined radial oilhole of power set and the axial oilhole of inclination enter the thrust face at left and right sides of thrust sleeve, subsequently into oil back chamber.Into One step, in order to cooperate the setting for tilting axial oilhole, the first oil film wedge face, the second oil film wedge face here is also provided with corresponding inclination oil Wedge surface, the angle for tilting oil film wedge face and horizontal plane is 82-99 degree.

There is a small amount of lubricating oil to enter the first thrust by the radial clearance between the first thrust bearing and thrust sleeve simultaneously The left side of bearing, this parts of lubricating oil are passing through when getting rid of oil groove of thrust sleeve, the oil pocket being dumped between backboard and thrust bearing It is interior, eventually enter into oil back chamber.

In another specific embodiment, the two sides of thrust sleeve are respectively set the first, second thrust bearing, and first, second Thrust bearing working face corresponding with thrust sleeve is respectively the first, second oil film wedge face, and the two sides working face of thrust sleeve is thrust face, Thrust sleeve is equipped with radial and axial oil holes, interconnects between radial direction oil hole and axial oilhole, so that into thrust sleeve Lubricating oil converges to oil back chamber after the thrust face of radial direction oil hole, axial oilhole and thrust sleeve two sides.These radial direction oil holes and Axial oilhole is circumferentially uniformly distributed, radial and axial oil holes be round oilhole, oval oilhole, semicircle oilhole or The rectangular oilhole of person.The Oil Guide portion of thrust sleeve, the sleeve part of thrust sleeve is arranged in 6 groups of radial and axial oil holes matched two-by-two Periphery be then equipped with and get rid of oil groove, the oil groove that gets rid of here is square slot or triangular groove.

Referring in Fig. 6, Fig. 7, the first oil film wedge face is intermittent fan-shaped convex surface, and the height on each convex surface is along rotor direction of rotation It gradually increases, groove is equipped between adjacent fan-shaped convex surface.The side of second thrust bearing is equipped with corresponding with the first oil film wedge face Second oil film wedge face, the second oil film wedge face are intermittent fan-shaped convex surface, and groove, the first, second oil are equipped between adjacent fan-shaped convex surface Wedge surface is respectively equipped with three pieces of fan-shaped convex surfaces, is uniformly arranged on the side of first or second thrust bearing, the height edge on each convex surface Rotor direction of rotation gradually increases.

It should be pointed out that can also have a variety of transformation and the implementation of remodeling for the utility model through absolutely proving Scheme, it is not limited to the specific embodiment of above embodiment.Above-described embodiment as just the utility model explanation, and It is not limitations of the present invention.In short, the protection scope of the utility model should include those for ordinary skill It obviously converts or substitutes and retrofit for personnel, and be determined by the appended claims.

Claims (6)

1. a kind of thrust bearing of turbocharger, thrust bearing are set in rotor-support-foundation system, turn to bear The axial force of subsystem, rotor-support-foundation system are equipped with oil inlet and oil back chamber, which is characterized in that thrust bearing includes a thrust Set, the first, second thrust bearing, the work corresponding with thrust sleeve of the first, second thrust bearing is respectively set in the two sides of thrust sleeve Face is equipped with oil film wedge face, and the two sides working face of thrust sleeve is thrust face, and thrust sleeve is equipped with radial and axial oil holes, radial direction oil hole It is interconnected between axial oilhole, so that the lubricating oil into thrust sleeve passes through radial direction oil hole, axial oilhole and thrust sleeve two Oil back chamber is converged to after the thrust face of side.

2. a kind of thrust bearing of turbocharger according to claim 1, which is characterized in that the first thrust axis The one side held is equipped with the first oil film wedge face and oil-recovery tank, and oil film wedge face and axial oil hole are located at same radial position, the first thrust axis Hold it is in the form of annular discs, the center be equipped with through-hole, to be set on thrust sleeve, the first oil film wedge face along through-hole circumferencial direction cloth It sets；

The another side of first thrust bearing is to get rid of pasta, gets rid of the periphery of pasta and thrust sleeve, backboard is formed together and gets rid of oil pocket, Periphery is equipped with and gets rid of the thrust sleeve that pasta matches and get rid of oil groove.

3. a kind of thrust bearing of turbocharger according to claim 2, which is characterized in that the first oil film wedge face Shape in continuous perhaps intermittent convex surface convex surface is fan-shaped or annular shape, and the height on each convex surface is along rotor direction of rotation It gradually increases；The side of second thrust bearing be equipped with the first oil film wedge face corresponding second oil film wedge face, the second oil film wedge face is continuous Perhaps the shape on intermittent convex surface convex surface is fan-shaped or circular, and the height on each convex surface gradually increases along rotor direction of rotation Add.

4. a kind of thrust bearing of turbocharger according to claim 1, which is characterized in that thrust sleeve includes Cylindric sleeve part and circular Oil Guide portion, the radial and axial oil holes matched two-by-two equipped with multiple groups in Oil Guide portion, Angle of intersection between radial direction oil hole and axial oilhole is 45-135 degree；It is equipped with main shaft in rotor-support-foundation system, is arranged with diameter on main shaft To bearing, thrust sleeve, the second thrust bearing, main shaft and transverse bearing are enclosed the first oil pocket, radial direction oil hole and first jointly Oil pocket is connected.

5. a kind of thrust bearing of turbocharger according to claim 2, which is characterized in that thrust sleeve gets rid of oil Slot is square groove, arc groove or triangular groove.

6. a kind of thrust bearing of turbocharger according to claim 4, which is characterized in that Oil Guide portion is equipped with The radial and axial oil holes that 2-10 group is matched two-by-two, these radial and axial oil holes are circumferentially uniformly distributed, diameter It is round oilhole, oval oilhole, semicircle oilhole or rectangular oilhole to oilhole and axial oilhole.