CN202250260U - Rotor supporting mechanism for rolling bearing turbocharger - Google Patents
Rotor supporting mechanism for rolling bearing turbocharger Download PDFInfo
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- CN202250260U CN202250260U CN201120307649XU CN201120307649U CN202250260U CN 202250260 U CN202250260 U CN 202250260U CN 201120307649X U CN201120307649X U CN 201120307649XU CN 201120307649 U CN201120307649 U CN 201120307649U CN 202250260 U CN202250260 U CN 202250260U
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- rolling bearing
- bearing
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Abstract
The utility model belongs to the field of superchargers for internal combustion engines, in particular a rotor supporting mechanism for a rolling bearing turbocharger. The rotor supporting mechanism comprises a bearing sleeve and two springs, two thrust sleeves and two bearings which are arranged in the bearing sleeve, wherein the two springs are symmetrically arranged in the bearing sleeve and are connected with each other; the two thrust sleeves sleeve the springs into the thrust sleeves from end parts of the two springs and apply pre-tightening force respectively; and the two bearings are arranged on end face parts of the thrust sleeves respectively and are rolling bearings in angular contact. The utility model has the advantages that: a common floating bearing is replaced by a ceramic rolling bearing, the mechanical efficiency and transient response capability of the turbocharger are improved, the problem of vibration of the rolling bearing turbocharger is solved, the stable performance of the supercharger is improved, the service life of the supercharger is prolonged, the supporting rigidity of the rolling bearing is improved, a limiting rotating speed of the rolling bearing is improved, the requirement on high-speed operation of the supercharger is met, the problem of lubrication of the supercharger is solved, the operating reliability of the rolling bearing turbocharger is improved, a force transfer system is balanced, and the requirement on normal work of the rolling bearing turbocharger is met.
Description
Technical field
The utility model belongs to internal-combustion engine and uses field of turbochargers, specifically is a kind of rotor supporting mechanism of rolling bearing turbosupercharger.
Background technique
As everyone knows, turbosupercharger is to be used for being higher than under the atmospheric pressure (supercharging), 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, and generally speaking, the power and the moment of torsion that install the motor behind the pressurized machine additional 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, and is 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.
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 the rotor-bearing system of turbosupercharger in the above-mentioned technology; Propose a kind of rotor supporting mechanism of rolling bearing turbosupercharger, this rotor supporting mechanism need not used thrust bearing simultaneously through changing original floating bearing into rolling bearing; Do not re-use thrust bearing; Reduced the quantity of part, practiced thrift cost, the reliability of system is provided.
The technological scheme that realizes the utility model purpose is following:
The rotor supporting mechanism of rolling bearing turbosupercharger; It comprises bearing housing and is located at two springs, two thrust housings and two bearings in the bearing housing; Two springs are symmetricly set in the bearing housing and interconnect; Two thrust housings pack into spring in the thrust housing from the end of two springs respectively and apply pretightening force, and two bearings are located at the end face area of thrust housing respectively, and two bearings all are the rolling bearing of angle contacting.
Through this technological scheme, adopt rolling bearing to replace normally used floating bearing, solved the turbo problem, improved the mechanical efficiency and the transient response ability of turbosupercharger; The rotor supporting mechanism 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 working speed of rolling bearing to a certain extent, satisfies the requirement of the high rotating speed operation of turbosupercharger; Calm the anger axial force transmission on the wheel 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 at the 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; When this support mechanism is fit into turbosupercharger and the intermediate in the turbosupercharger certain clearance is arranged, the gap is used to fill oil film and produces squeeze film damper, bearing housing is fixed on the endoporus of intermediate with pin; During the turbosupercharger proper functioning, lubricant oil can be full of the gap between them, and oil film can hold up whole rotor-support-foundation 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; Having oil film is full of wherein; Form film damper, it can absorbed oscillation, guarantees the steady running of rotor.
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., applied pretightening force simultaneously
Rolling bearing that rolling bearing is a bearing radial force in the described rolling bearing, another is the rolling bearing of thrust.This rotor supporting mechanism does not need to use separately common floating bearing turbosupercharger thrust bearing commonly used, has reduced the quantity and the cost of part, and the reliability of system is provided.
Described spring is the thermal compensation parts.Rotor-support-foundation system 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 ceramic rolling bearing from skidding, and can improve the support stiffness of bearing.The support stiffness of rolling bearing is high more, and its corresponding limit speed is also just high more, and therefore, the fit of this level pressure pretension can provide the working speed of rolling bearing, satisfies the requirement of the high rotating speed operation of turbosupercharger.
Described bearing housing is provided with oilhole, and the side face of thrust housing is provided with oil leab, is provided with spray-hole in the thrust housing, and spray-hole is communicated with oil leab and will exports aims at rolling bearing, and oilhole is aimed at oil leab.Form two oil circuits between bearing housing and two thrust housings and two rolling bearings; After pressure lubrication oil gets into circular oil leab through oilhole; Get into spray-hole by oil leab, by spray-hole lubricant oil is spurted in the rolling bearing with the form of mist of oil at last.
Described spray-hole is injected into mist of oil with lubricant oil.
The utility model has the advantages that and adopt ceramic rolling bearing to replace common floating bearing, such support mechanism has solved the problem of turbo, has 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 structure sectional view of the utility model.
Embodiment
Like Fig. 1, shown in Figure 2, the rotor supporting mechanism of rolling bearing turbosupercharger, it comprises bearing housing and is located at two springs, two thrust housings and two bearings in the bearing housing 1; Two springs be respectively spring 4, spring 4 ', two thrust housings be respectively thrust housing 3, thrust housing 3 ', the rolling bearing 2 that two bearings are angle contacting, rolling bearing 2 '; Spring 4 and spring 4 ' be symmetricly set in the bearing housing 1 also interconnect, and two thrust housings pack into spring in the thrust housing 1 from the end of two springs respectively and apply pretightening force, and thrust housing 3 is located at the left side of spring 4; Spring 4 inserts in the thrust housings 3, thrust housing 3 ' be located at spring 4 ' right side, and spring 4 ' insertion thrust housing 3 ' in; Two bearings are located at the end face area of thrust housing respectively, and promptly rolling bearing 2 is located on the left side of thrust housing 3, rolling bearing 2 ' be located at thrust housing 3 ' the right side; Bearing housing 1 is fixed on through locating stud 5 on the intermediate of turbosupercharger, and rolling bearing 2 is connected rolling bearing 2 ' be connected with turbine with the wheel of calming the anger; Calm the anger the wheel on axial force; Being delivered on the interior ring of rolling bearing 2 through the axle envelope, is angular contact bearing owing to what select for use, and axial force can be delivered on the thrust housing 3 through ball and outer shroud; Thrust housing 3 through spring 4 with axial force transmission to the second spring 4 '; To thrust housing 3 ', thrust housing 3 ' again with axial force transmission to rolling bearing 2 ' outer shroud, the interior ring through this angular contact bearing again with axial force transmission to turbine shaft.
In the above-mentioned mode of execution, rolling bearing 2 and rolling bearing 2 ' can be 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.
In the above-mentioned mode of execution, rolling bearing 2 that rolling bearing is a bearing radial force in the rolling bearing, another for the rolling bearing 2 of thrust '.This rotor supporting mechanism need not used common floating bearing turbosupercharger thrust bearing commonly used, has reduced the quantity and the cost of part, and the reliability of system is provided.
In the above-mentioned mode of execution, spring 4 and spring 4 ' be the thermal compensation parts.Rotor-support-foundation system 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 ceramic rolling bearing from skidding, and can improve the support stiffness of bearing.The support stiffness of rolling bearing is high more, and its corresponding limit speed is also just high more, and therefore, the fit of this level pressure pretension can satisfy the requirement of the high rotating speed operation of turbosupercharger at the maximal work rotating speed that improves rolling bearing.
In the above-mentioned mode of execution; Bearing housing 1 is provided with oilhole 1a; Thrust housing 3 and thrust housing 3 ' side face be provided with oil leab 3a; Be provided with spray-hole 3b in the thrust housing, spray-hole 3b be communicated with oil leab 3a and will export aim at rolling bearing 2 and rolling bearing 2 ', oilhole 1a aims at oil leab 3a.Form two oil circuits between bearing housing and two thrust housings and two rolling bearings; After pressure lubrication oil gets into circular oil leab through oilhole; Get into spray-hole by oil leab, by spray-hole lubricant oil is spurted in the rolling bearing with the form of mist of oil at last.
In the above-mentioned mode of execution, spray-hole 3b is injected into mist of oil with lubricant oil.
Claims (6)
1. the rotor supporting mechanism of rolling bearing turbosupercharger; It comprises bearing housing and is located at two springs, two thrust housings and two bearings in the bearing housing; Two springs are symmetricly set in the bearing housing and interconnect; Two thrust housings pack into spring in the thrust housing from the end of two springs respectively and apply pretightening force, and two bearings are located at the end face area of thrust housing respectively, and two bearings all are the rolling bearing of angle contacting.
2. the rotor supporting mechanism of rolling bearing turbosupercharger according to claim 1 is characterized in that: described rolling bearing is a ceramic rolling bearing.
3. the rotor supporting mechanism of rolling bearing turbosupercharger according to claim 1 and 2 is characterized in that: rolling bearing that rolling bearing is a bearing radial force in the described rolling bearing, another is the rolling bearing of thrust.
4. the rotor supporting mechanism of rolling bearing turbosupercharger according to claim 1 is characterized in that: described spring is the thermal compensation parts, has applied pretightening force simultaneously.
5. the rotor supporting mechanism of rolling bearing turbosupercharger according to claim 1; It is characterized in that: described bearing housing is provided with oilhole; The side face of thrust housing is provided with oil leab; Be provided with spray-hole in the thrust housing, spray-hole is communicated with oil leab and will exports aims at rolling bearing, and oilhole is aimed at oil leab.
6. the rotor supporting mechanism of rolling bearing turbosupercharger according to claim 5 is characterized in that: described spray-hole is injected into mist of oil with lubricant oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120307649XU CN202250260U (en) | 2011-08-23 | 2011-08-23 | Rotor supporting mechanism for rolling bearing turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120307649XU CN202250260U (en) | 2011-08-23 | 2011-08-23 | Rotor supporting mechanism for rolling bearing turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250260U true CN202250260U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120307649XU Expired - Fee Related CN202250260U (en) | 2011-08-23 | 2011-08-23 | Rotor supporting mechanism for rolling bearing turbocharger |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278154A (en) * | 2011-08-23 | 2011-12-14 | 常州环能涡轮动力有限公司 | Rotor supporting mechanism for rolling bearing turbocharger |
| CN106640352A (en) * | 2016-12-28 | 2017-05-10 | 宁波丰沃涡轮增压系统有限公司 | Turbocharger using ball full floating bearings |
| CN106844991A (en) * | 2017-02-08 | 2017-06-13 | 中国机械工业集团有限公司 | Air-flotation type vibration control system air spring rigidity self-balancing iteration recognition methods |
| CN107366570A (en) * | 2016-05-13 | 2017-11-21 | 霍尼韦尔国际公司 | Turbocharger assembly |
-
2011
- 2011-08-23 CN CN201120307649XU patent/CN202250260U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278154A (en) * | 2011-08-23 | 2011-12-14 | 常州环能涡轮动力有限公司 | Rotor supporting mechanism for rolling bearing turbocharger |
| CN107366570A (en) * | 2016-05-13 | 2017-11-21 | 霍尼韦尔国际公司 | Turbocharger assembly |
| CN106640352A (en) * | 2016-12-28 | 2017-05-10 | 宁波丰沃涡轮增压系统有限公司 | Turbocharger using ball full floating bearings |
| CN106640352B (en) * | 2016-12-28 | 2021-07-30 | 宁波丰沃增压科技股份有限公司 | Turbocharger using ball full-floating bearing |
| CN106844991A (en) * | 2017-02-08 | 2017-06-13 | 中国机械工业集团有限公司 | Air-flotation type vibration control system air spring rigidity self-balancing iteration recognition methods |
| CN106844991B (en) * | 2017-02-08 | 2020-05-19 | 中国机械工业集团有限公司 | Air spring rigidity self-balancing iterative identification method for air floating type vibration control system |
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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: 20120530 Termination date: 20150823 |
|
| EXPY | Termination of patent right or utility model |