CN202273714U - Antifriction bearing turbocharger - Google Patents
Antifriction bearing turbocharger Download PDFInfo
- Publication number
- CN202273714U CN202273714U CN2011203079549U CN201120307954U CN202273714U CN 202273714 U CN202273714 U CN 202273714U CN 2011203079549 U CN2011203079549 U CN 2011203079549U CN 201120307954 U CN201120307954 U CN 201120307954U CN 202273714 U CN202273714 U CN 202273714U
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- rolling bearing
- bearing
- lubricant oil
- housing
- turbosupercharger
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Abstract
The utility model belongs to the field of superchargers for internal combustion engines, particularly a ceramic antifriction bearing turbocharger provided with an oil slick damper, which comprises a compressor part and a turbine part. The compressor part comprises a gas compression wheel and the turbine part comprises a turbine. The gas compression wheel and the turbine are connected through a rotor support system arranged in an intermediate body. A lubricating system is arranged inside the rotor support system. According to the utility model, the mechanical efficiency, the transient response capability and the steady-state behavior of the turbocharger are improved and the service life of the turbocharger is prolonged. Meanwhile, the limiting speed of an antifriction bearing is increased, so that the requirement on the high-speed running of the turbocharger is satisfied. The operation reliability of the antifriction bearing supercharger is also improved.
Description
Technical field
The utility model belongs to internal-combustion engine and uses the pressurized machine field, specifically is a kind of ceramic rolling bearing turbosupercharger with film damper.
Background technique
As everyone knows, turbosupercharger is to be used for being higher than under the atmospheric pressure, with the device of the suction port of air IC engine supply.Traditional turbosupercharger comprises exhaust-driven turbine wheel, and said exhaust-driven turbine wheel is installed on the running shaft in the turbine case, and said turbine case is bonded on the downstream of engine export manifold.The rotation of turbine wheel drives the rotation of the compressor impeller in the pressure shell on the other end.Compressor impeller arrives the engine air admittance manifold with compressed air delivery.The rotor of turbosupercharger is supported by the bearing arrangement in the bearing support.
In fact turbosupercharger is exactly a kind of special air compressor.High temperature, high pressure exhaust gas that it utilizes motor to discharge, inertia impulsive force promote the turbine in the turbine case.Exhaust gas turbine drives coaxial compressor turbine again, and the air that force feed is sent here by the air-strainer pipeline makes it supercharging and gets into cylinder.Through turbosupercharging; The air that gets into cylinder is more than the air that the natural aspiration mode gets into cylinder, thereby can burn more fuel, has improved combustion process; Reduced combustion noise; Reduce discharge of harmful gases, increased the Economy of fuel oil, improved Engine Mechanical efficient and output power.The turbosupercharging great advantage is not strengthen power and the moment of torsion that engine displacement just can improve motor significantly.Generally speaking, install turbosupercharger additional after, the power of motor and moment of torsion will increase 20-30%.
Generally speaking, the rotor-bearing system of turbosupercharger adopts floating bearing mostly.The advantage of floating bearing is that rotating speed is high, and noise is little, operates steadily.But because the work characteristics of vehicle turbocharger: when vehicle launch, pressurized machine can not obtain the lubricated of lubricant oil immediately; Bigger to the bearing injury; And the sensitivity of floating bearing is also relatively poor, can cause turbo lag in throttle, forms the turbo effect.Therefore, in order to solve the problems referred to above of floating bearing turbosupercharger, people begin to consider to adopt the supporting system of rolling bearing as turbosupercharger.But research shows that the vibration meeting of rotor-support-foundation system is bigger if directly adopt rolling bearing as supporting, and fluctuation of service causes the working life of turbosupercharger very short.
Summary of the invention
The purpose of the utility model is to use the shortcoming of the existing floating bearing poor sensitivity of floating bearing to turbosupercharger in the above-mentioned technology; A kind of rolling bearing turbosupercharger is proposed; It has highly sensitive; Can improve the stable state and the mapping of turbosupercharger greatly, have the characteristics of advantages of higher stability and reliability simultaneously.
The technological scheme that realizes the utility model purpose is following:
The rolling bearing turbosupercharger; It comprises compressor section and turbo machine part, and compressor section comprises the wheel of calming the anger, and the turbine portion branch comprises turbine; Calm the anger the wheel with turbine between be connected through the rotor-bearing system that is located in the intermediate, be provided with lubrication system in the rotor-bearing system; Rotor-bearing system comprises the rolling bearing of two springs, two thrust housings and two angle contacting in the bearing housing that is located on the turbine shaft and the bearing housing; Two springs all are located in the bearing housing and interconnect; The side of each spring is respectively equipped with a thrust housing, and each thrust housing side is provided with a rolling bearing, and bearing housing is fixed in the intermediate through positioning element; The interior ring of one of them rolling bearing is connected with the wheel of calming the anger, and the interior ring of another rolling bearing is connected with turbine; Lubrication system is communicated with bearing housing, two thrust housings and two rolling bearings.
Through this technological scheme, adopt rolling bearing to replace common floating bearing, solved the problem of turbo, improved the mechanical efficiency and the transient response ability of turbosupercharger; The rotor-support-foundation system of this turbosupercharger has respectively been installed a spring in the inboard of rolling bearing, as thermal compensation device, to eliminate the thermal stress between the parts; Simultaneously, spring also is applied with certain pretightening force in the installation process of reality, is equivalent to play the effect of level pressure pretension; Can eliminate axial internal clearance, prevent that rolling bearing from skidding, and can improve the support stiffness of rolling bearing; The support stiffness of rolling bearing is high more, and its corresponding limit speed is also just high more.Therefore, the fit of this level pressure pretension can provide the limit speed of rolling bearing to a certain extent, satisfies the requirement of the high rotating speed operation of turbosupercharger; Calm the anger the wheel on axial force transmission to the interior ring of fore bearing; Because what select for use is angular contact bearing, axial force can be delivered on the thrust housing of back through ball and outer shroud, and thrust housing passes through spring with axial force transmission to the second thrust housing; Second thrust housing is again with the outer shroud of axial force transmission to rear bearing; Interior ring through this angular contact bearing again with axial force transmission to turbine shaft, so rotor-support-foundation system no longer needs independent thrust bearing, reduced part number.
Described lubrication system comprises squeeze film damper and the grease channel that is communicated with squeeze film damper; Grease channel is communicated with bearing housing, two thrust housings and two rolling bearings, and squeeze film damper forms through the gap that lubricant oil is filled between bearing housing and the intermediate.When the benefit of design was the turbosupercharger proper functioning like this, lubricant oil can be full of the gap between bearing housing and the intermediate, and oil film can hold up whole rotor-bearing system; Form squeeze film damper, can reduce the vibration of turbocharger operation so greatly, thereby improve the life-span and the reliability of turbosupercharger; During the turbosupercharger proper functioning, the oil film that has lubricant oil is full of wherein, forms film damper; It can absorbed oscillation, guarantees the steady running of rotor.
Described grease channel comprises the lubricant oil spray-hole in lubricant oil main stem, the lubricant oil by-path on the intermediate, the oilhole on the bearing housing, the oil leab on the thrust housing and the thrust housing of being located on the positioning element; The lubricant oil main stem is communicated with lubricant oil by-path one end; The lubricant oil by-path the other end is communicated with oilhole; Oilhole is communicated with oil leab, and oil leab is communicated with the lubricant oil spray-hole, and the outlet of lubricant oil spray-hole is aimed between the outer shroud and interior ring of rolling bearing.The benefit of design is the oil circuit that lubricant oil can enter into intermediate through positioning element like this; Spray in the oil circuit of bearing housing and thrust housing again; Through the rolling bearing of lubricant oil spray-hole, guaranteed the stable operation of pressurized machine at last with the lubricated lubricated turbosupercharger two ends of mode of mist.
Described rolling bearing is a ceramic rolling bearing.Centrifugal force and gyrostatic moment that rolling element produces are directly proportional with its density of material, and the density of making the silicon nitride (Si3N4) of ceramic bearing only is 40% of Bearing Steel, adopt ceramic rolling bearing to help satisfying high-revolving requirement; The Young's modulus of stupalith is big, and thermal expansion coefficient is merely 25% of steel, makes ceramic rolling bearing have rigidity height, advantage that radial clearance is stable, adopts ceramic rolling bearing to help satisfying the requirement of turbosupercharger high stability.
The described wheel of calming the anger carries out being connected with adjacent rolling bearing through the interior ring that the axle envelope is located at rolling bearing.
Described turbine is fixed in the interior ring of adjacent rolling bearing through turbine shaft.
Described grease channel is divided into two-way, and two-way grease channel lubricant oil main stem in the positioning element is a starting point, flows to the lubricant oil spray-hole of two thrust housings respectively.The design of such double flow channel lubrication system has solved the lubrication problem of pressurized machine, has improved rolling bearing pressurized machine reliability of operation.
Described lubricant oil main stem comprises the hollow cavity in the positioning element and leads to the oil transportation hole of positioning element sidewall by hollow cavity that this oil transportation hole is communicated with the lubricant oil by-path of described intermediate.
Described positioning element is a locating stud.Locating stud on the intermediate is except playing the stationary axle bearing sleeve; Outside the formation squeeze film damper; Also be designed to hollow structure, lubricant oil can enter into the oil circuit of intermediate through locating stud, sprays again in the oil circuit of bearing housing and thrust housing; With the rolling bearing at the lubricated lubricated turbosupercharger two ends of mode of mist, guaranteed the stable operation of pressurized machine at last.
Described intermediate both sides also are respectively equipped with seal ring, gland and thermal shield.
The utility model has the advantages that and adopt ceramic rolling bearing to replace common floating bearing, solved the problem of turbo, improved the mechanical efficiency and the transient response ability of turbosupercharger; Adopt the shock-absorbing bearing structure of squeeze film damper, solved the vibration problem of rolling bearing turbosupercharger, the steady-state behaviour and the life-span of having improved pressurized machine; Adopt the bearing fit of level pressure pretension, improved the support stiffness of rolling bearing, thereby promoted the limit speed of rolling bearing, satisfied the requirement that turbosupercharger runs up; Adopt the double flow channel lubrication system, solved the lubrication problem of pressurized machine, improved rolling bearing pressurized machine reliability of operation; The actuating system of balance has satisfied the demand of rolling bearing turbosupercharger proper functioning.
Description of drawings
Fig. 1 is the fractionation structural representation of the utility model;
Fig. 2 is the internal view of the utility model;
Fig. 3 is the enlarged diagram at M position among Fig. 2;
Embodiment
Like Fig. 1, shown in Figure 2; The rolling bearing turbosupercharger; It comprises compressor section and turbo machine part, and compressor section comprises the wheel 2 of calming the anger in the shell 1 of calming the anger, and the turbine portion branch comprises the turbine 4 in the volute 5; Calming the anger is connected through being located at the interior rotor-bearing systems of intermediate 12 between wheel 2 and the turbine 4, is provided with lubrication system in the rotor-bearing system; Rotor-bearing system comprise spring 8 and spring 8 in the bearing housing 9 that is located on the turbine shaft 14 and the bearing housing 9 ', thrust housing 7 and thrust housing 7 ', the rolling bearing 6 of angle contacting and rolling bearing 6 '; Spring 8 and spring 8 ' be located at respectively in the bearing housing 9, spring 8 and spring 8 ' between elasticity be connected, the side of each spring is respectively equipped with a thrust housing; The left side that is spring 8 is provided with thrust housing 9; Spring 8 stretches in the counterbore in the thrust housing 9, spring 8 ' the right side be provided with thrust housing 9 ', spring 8 ' stretch into thrust housing 9 ' in counterbore in; Each thrust housing side is provided with a rolling bearing; The left side that is thrust housing 9 is provided with rolling bearing 6, thrust housing 9 ' the right side be provided with rolling bearing 6 ', bearing housing 9 is fixed in the intermediate 12 through positioning element; The interior ring of one of them rolling bearing 62 is connected with the wheel of calming the anger, another rolling bearing 6 ' interior ring be connected with turbine 4; Lubrication system and bearing housing 9, two thrust housings 7,7 ' and two rolling bearings 6,6 ' be communicated with; This lubrication system can get final product thrust housing 7,7 ' and two rolling bearings 6,6 ' be lubricated at least; Rolling bearing 6 main bearing radial forces, rolling bearing 6 ' can play the thrust effect.
In the above mode of execution, adopt the rolling bearing of angle contacting to replace common floating bearing in the existing technology, make the axial transmission of torque of formation between rolling bearing, thrust housing and the spring; Not only solved the problem of turbo; And having improved the mechanical efficiency and the transient response ability of turbosupercharger, ball bearing has good transient response property, lower advantages such as lubricating requirement; Rolling bearing has very high mechanical efficiency simultaneously: 0.95～0.99 (floating bearing is generally 0.85～0.95); Test result shows that when small flow, the turbocharger efficiency of rolling bearing is done about 20% than the turbosupercharger of floating bearing; Also can improve about 5% during big flow, this will improve the stable state and the mapping of turbosupercharger greatly; The rotor-support-foundation system of this turbosupercharger has respectively been installed a spring in the inboard of rolling bearing, as thermal compensation device, to eliminate the thermal stress between the parts; Simultaneously, spring also is applied with certain pretightening force in the installation process of reality, is equivalent to play the effect of level pressure pretension; Can eliminate axial internal clearance, prevent that rolling bearing from skidding, and can improve the support stiffness of rolling bearing; The support stiffness of rolling bearing is high more, and its corresponding limit speed is also just high more.Therefore, the fit of this level pressure pretension can provide the limit speed of rolling bearing to a certain extent, satisfies the requirement of the high rotating speed operation of turbosupercharger; Calm the anger the wheel on axial force transmission to the interior ring of fore bearing; Because what select for use is angular contact bearing; Axial force can be delivered on the thrust housing of back through ball and outer shroud; With axial force transmission to the second thrust housing, second thrust housing be again with the outer shroud of axial force transmission to rear bearing through spring for thrust housing, the interior ring through this angular contact bearing again with axial force transmission to turbine shaft.
In the above mode of execution; Lubrication system can comprise squeeze film damper and the grease channel that is communicated with squeeze film damper; Grease channel and bearing housing 9, thrust housing 7, thrust housing 7 ', rolling bearing 6 and rolling bearing 6 ' be communicated with, squeeze film damper forms through the gap 15 that lubricant oil is filled between bearing housing 9 and the intermediate 12.When the benefit of design was the turbosupercharger proper functioning like this, pressure lubrication oil can be full of the gap between bearing housing and the intermediate, and oil film can hold up whole rotor-bearing system; Form squeeze film damper; Can reduce the vibration of turbocharger operation so greatly, thereby improve the life-span and the reliability of turbosupercharger, during the turbosupercharger proper functioning; The oil film that has lubricant oil is full of wherein; Form film damper, it can absorbed oscillation, guarantees the steady running of rotor-bearing system.
Aforementioned grease channel can comprise the lubricant oil spray-hole 7b in lubricant oil main stem 10a, the lubricant oil by-path 12a on the intermediate 12, the oilhole 9a on the bearing housing, the oil leab 7a on the thrust housing and the thrust housing of being located on the positioning element; Oil leab 7a is the circular oil duct that is located on the thrust housing side face; Where rotate to like the opinion thrust housing like this; Lubricant oil among the oilhole 9a all can get among the oil leab 7a; Lubricant oil main stem 10a is communicated with lubricant oil by-path 12a one end, and the lubricant oil by-path 12a the other end is communicated with oilhole 9a, and oilhole 9a is communicated with oil leab 7a; Oil leab 7a is communicated with lubricant oil spray-hole 7b, and lubricant oil spray-hole 7b outlet is aimed between the outer shroud and interior ring of rolling bearing.The benefit of design is the oil circuit that lubricant oil can enter into intermediate through positioning element like this, sprays again in the oil circuit of bearing housing and thrust housing, sprays in the rolling bearing with the lubricated mode of mist through the lubricant oil spray-hole at last; Grease channel is divided into two-way; Two-way grease channel lubricant oil main stem in the positioning element is a starting point, flows to the lubricant oil spray-hole of two thrust housings respectively, the design of such double flow channel lubrication system; Solved the lubrication problem of pressurized machine; Improved rolling bearing pressurized machine reliability of operation, thereby the rolling bearing at lubricated turbosupercharger two ends has guaranteed the stable operation of pressurized machine.
In the above-mentioned mode of execution; Rolling bearing 6 and rolling bearing 6 ' be ceramic rolling bearing; Centrifugal force and gyrostatic moment that rolling element produces are directly proportional with its density of material; The density of making the silicon nitride (Si3N4) of ceramic bearing only is 40% of Bearing Steel, adopts ceramic rolling bearing to help satisfying high-revolving requirement; The Young's modulus of stupalith is big, and thermal expansion coefficient is merely 25% of steel, makes ceramic rolling bearing have rigidity height, advantage that radial clearance is stable.
In the above-mentioned mode of execution, the wheel 2 of calming the anger carries out being connected with adjacent rolling bearing 6 through the interior ring that axle envelope 3 is located at rolling bearing 6.
In the above-mentioned mode of execution, turbine 4 through turbine shaft 14 be fixed on adjacent rolling bearing 6 ' interior ring in.
In the above-mentioned mode of execution, the lubricant oil main stem comprises the hollow cavity in the positioning element and leads to the oil transportation hole 10b of positioning element sidewall by hollow cavity that this oil transportation hole 10b is communicated with the lubricant oil by-path 12a of described intermediate.
In the above-mentioned mode of execution, positioning element is a locating stud 10, and the locating stud 10 on the intermediate is except playing the stationary axle bearing sleeve; Outside the formation squeeze film damper; Also be designed to hollow structure, lubricant oil can enter into the oil circuit of intermediate through locating stud, sprays again in the oil circuit of bearing housing and thrust housing; With the rolling bearing at the lubricated lubricated turbosupercharger two ends of mode of mist, guaranteed the stable operation of pressurized machine at last.
In the above-mentioned mode of execution, intermediate 12 both sides also are respectively equipped with seal ring, gland 13 and thermal shield 11, play sealing and heat insulation effect respectively.
In the utility model, lubricating oil system can adopt the mode of multiple oil duct combination, and can say that locating stud manufactures with intermediate and cooperates the formation gap to carry out the mode of fuel feeding, is not to supply pressure oil with the locating stud of hollow.
Claims (10)
1. rolling bearing turbosupercharger; It comprises compressor section and turbo machine part, and compressor section comprises the wheel of calming the anger, and the turbine portion branch comprises turbine; Calm the anger the wheel with turbine between be connected through the rotor-bearing system that is located in the intermediate, be provided with lubrication system in the rotor-bearing system; Rotor-bearing system comprises the rolling bearing of two springs, two thrust housings and two angle contacting in the bearing housing that is located on the turbine shaft and the bearing housing; Two springs all are located in the bearing housing and interconnect; The side of each spring is respectively equipped with a thrust housing, and each thrust housing side is provided with a rolling bearing, and bearing housing is fixed in the intermediate through positioning element; The interior ring of one of them rolling bearing is connected with the wheel of calming the anger, and the interior ring of another rolling bearing is connected with turbine; Lubrication system is communicated with bearing housing, two thrust housings and two rolling bearings.
2. rolling bearing turbosupercharger according to claim 1; It is characterized in that: described lubrication system comprises squeeze film damper and the grease channel that is communicated with squeeze film damper; Grease channel is communicated with bearing housing, two thrust housings and two rolling bearings, and squeeze film damper forms through the gap that lubricant oil is filled between bearing housing and the intermediate.
3. rolling bearing turbosupercharger according to claim 2; Its characteristic exists: described grease channel comprises lubricant oil main stem, the lubricant oil by-path on the intermediate, the oilhole on the bearing housing, the oil leab on the thrust housing and the lubricant oil spray-hole of being located on the positioning element in the thrust housing; The lubricant oil main stem is communicated with lubricant oil by-path one end; The lubricant oil by-path the other end is communicated with oilhole; Oilhole is communicated with oil leab, and oil leab is communicated with the lubricant oil spray-hole, and the outlet of lubricant oil spray-hole is aimed between the outer shroud and interior ring of rolling bearing.
4. according to claim 1 or 2 or 3 described rolling bearing turbosupercharger, it is characterized in that: described rolling bearing is a ceramic rolling bearing.
5. rolling bearing turbosupercharger according to claim 1 is characterized in that: the described wheel of calming the anger is connected with the interior ring of adjacent rolling bearing through the axle envelope.
6. rolling bearing turbosupercharger according to claim 1 is characterized in that: described turbine is fixed in the interior ring of adjacent rolling bearing through turbine shaft.
7. according to claim 2 or 3 described rolling bearing turbosupercharger, it is characterized in that: described grease channel is divided into two-way, and two-way grease channel lubricant oil main stem in the positioning element is a starting point, flows to the lubricant oil spray-hole of two thrust housings respectively.
8. rolling bearing turbosupercharger according to claim 3; It is characterized in that: described lubricant oil main stem comprises the hollow cavity in the positioning element and leads to the oil transportation hole of positioning element sidewall by hollow cavity that this oil transportation hole is communicated with the lubricant oil by-path of described intermediate.
9. according to claim 1 or 2 or 3 or 5 or 6 or 8 described rolling bearing turbosupercharger, it is characterized in that: described positioning element is a locating stud.
10. rolling bearing turbosupercharger according to claim 1 is characterized in that: described intermediate both sides also are respectively equipped with gland and thermal shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203079549U CN202273714U (en) | 2011-08-23 | 2011-08-23 | Antifriction bearing turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203079549U CN202273714U (en) | 2011-08-23 | 2011-08-23 | Antifriction bearing turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202273714U true CN202273714U (en) | 2012-06-13 |
Family
ID=46194078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203079549U Expired - Fee Related CN202273714U (en) | 2011-08-23 | 2011-08-23 | Antifriction bearing turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202273714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266272A (en) * | 2018-03-12 | 2018-07-10 | 西北工业大学 | A kind of microminiature turbine engine axle sleeve |
| CN111734672A (en) * | 2020-07-02 | 2020-10-02 | 中国航发常州兰翔机械有限责任公司 | Tangential injection lubricating system for turboshaft engine and using method thereof |
-
2011
- 2011-08-23 CN CN2011203079549U patent/CN202273714U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266272A (en) * | 2018-03-12 | 2018-07-10 | 西北工业大学 | A kind of microminiature turbine engine axle sleeve |
| CN111734672A (en) * | 2020-07-02 | 2020-10-02 | 中国航发常州兰翔机械有限责任公司 | Tangential injection lubricating system for turboshaft engine and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20180823 |
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| CF01 | Termination of patent right due to non-payment of annual fee |