CN117345682A - Cantilever type integrated micro-oil high-speed bearing device for supercharger and control method - Google Patents

Cantilever type integrated micro-oil high-speed bearing device for supercharger and control method Download PDF

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Publication number
CN117345682A
CN117345682A CN202311587750.9A CN202311587750A CN117345682A CN 117345682 A CN117345682 A CN 117345682A CN 202311587750 A CN202311587750 A CN 202311587750A CN 117345682 A CN117345682 A CN 117345682A
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CN
China
Prior art keywords
oil
hole
rotor shaft
ball bearing
bearing
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Pending
Application number
CN202311587750.9A
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Chinese (zh)
Inventor
李延昭
司英杰
信效芬
宋丽华
张金明
于效顺
王新亮
夏炳勋
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Weifang University of Science and Technology
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Weifang University of Science and Technology
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Application filed by Weifang University of Science and Technology filed Critical Weifang University of Science and Technology
Priority to CN202311587750.9A priority Critical patent/CN117345682A/en
Publication of CN117345682A publication Critical patent/CN117345682A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/14—Lubrication of pumps; Safety measures therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/059—Roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

The invention belongs to the technical field of turbochargers, and discloses a cantilever type integrated micro-oil high-speed bearing device for a supercharger and a control method, wherein the cantilever type integrated micro-oil high-speed bearing device for the supercharger comprises a rotor shaft, an inducer is sleeved on the outer surface of the rotor shaft and near the front end of the rotor shaft, a supporting bearing assembly for supporting the rotor shaft to rotate is arranged in the middle of the inducer, an oil inlet and outlet way is arranged on the supporting bearing assembly, and the other end of the oil inlet and outlet way is communicated with an external oil tank; the supporting bearing assembly comprises a bushing fixedly arranged on the inducer, a mounting through hole is formed in the bushing, a first ball bearing and a second ball bearing are respectively arranged between the position, close to the two ends, of the mounting through hole and the rotor shaft, and a vane pump is arranged on the rotor shaft between the first ball bearing and the second ball bearing.

Description

Cantilever type integrated micro-oil high-speed bearing device for supercharger and control method
Technical Field
The invention belongs to the technical field of turbochargers, and particularly relates to a cantilever type integrated micro-oil high-speed bearing device for a supercharger and a control method.
Background
The traditional turbocharger consists of a compressor, a turbine and an intermediate body, as shown in fig. 1-2, one side of the intermediate body 1 is fixedly provided with a compressor shell 4, a compressor impeller 8 is arranged in the compressor shell 4, the other side of the intermediate body 1 is fixedly provided with a turbine shell 10, a turbine rotor 9 is arranged in the turbine shell 10, a rotor shaft is integrally connected to the turbine rotor 9, the other end of the rotor shaft penetrates through the intermediate body 1 and is fixedly connected with the corresponding compressor impeller 8, a floating bearing 2 and a thrust bearing 3 are arranged in the intermediate body 1, and the floating bearing 2 is used for supporting the rotor shaft to rotate at a high speed; the thrust bearing 3 is for carrying an axial load.
The inner ring and the outer ring of the floating bearing and the thrust bearing need lubricating oil to form an oil film for bearing and damping; the contact between the components is avoided to generate abrasion; conventional turbochargers therefore require the provision of a lubrication oil line.
The lubricating oil pipeline comprises an oil inlet 6 and an oil return opening 7 which are formed in the intermediate body, the oil inlet 6 and the oil return opening 7 are respectively communicated with the positions of the floating bearing 2 and the thrust bearing 3, and the other ends of the oil inlet 6 and the oil return opening 7 are respectively communicated with lubricating oil of the engine through oil inlet and return pipelines, so that synchronous conveying of the lubricating oil of the engine into the supercharger is realized.
Therefore, enough space is reserved for oil pipe arrangement in the structural arrangement process of the engine; and the inside of the turbocharger is provided with a sealing structure because of the entering of lubricating oil, so that the problem of leakage caused by the entering of the lubricating oil into the compressor or the turbine is prevented.
However, since gaps are required between parts in the high-speed rotation process of the turbocharger, friction is not avoided, and leakage is inevitably generated.
Meanwhile, because the intermediate of the turbocharger is provided with lubricating oil, the part close to the turbine is affected by high temperature, so that the problems of aging of the lubricating oil, generation of particles, carbonization and the like are solved, and the problems of clamping stagnation, sintering, failure of a sealing structure and the like are solved by impurities in the lubricating oil.
Therefore, a water cooling structure is adopted in products with higher exhaust temperature of the turbocharger, and an engine is required to be independently additionally provided with a water inlet pipeline and a water return pipeline for the turbocharger, so that the turbocharger is complicated in structure and increased in volume.
Disclosure of Invention
The invention aims to solve the main technical problems of providing a cantilever type integrated micro-oil high-speed bearing device for a supercharger and a control method, wherein a bearing for supporting a rotor shaft to rotate of a turbocharger is adjusted to the front end of an impeller of a compressor from a middle body part, so that the supercharger is compact in structure, an oil cavity for storing lubricating oil is arranged in a shell of the compressor, lubricating oil can be sucked into each bearing to lubricate the bearings, and the using effect is improved.
In order to solve the technical problems, the invention provides the following technical scheme:
the cantilever type integrated micro-oil high-speed bearing device for the supercharger comprises a rotor shaft, wherein an inducer is sleeved on the outer surface of the rotor shaft and close to the front end of the rotor shaft, a support bearing assembly for supporting the rotor shaft to rotate is arranged in the middle of the inducer, an oil inlet and outlet way is arranged on the support bearing assembly, and the other end of the oil inlet and outlet way is communicated with an external oil tank; the supporting bearing assembly comprises a bushing fixedly installed on the inducer, an installation through hole is formed in the bushing, a first ball bearing and a second ball bearing are respectively installed between the position, close to the two ends, of the installation through hole and the rotor shaft, a vane pump is arranged on the rotor shaft between the first ball bearing and the second ball bearing, the vane pump works to generate pressure difference, and lubricating oil is conveyed to the first ball bearing and the second ball bearing through an oil inlet and outlet way to lubricate the first ball bearing and the second ball bearing.
The following is a further optimization of the above technical solution according to the present invention:
a spring is arranged on one side of the first ball bearing, which is close to the second ball bearing, and the other end of the spring is propped against a shaft shoulder in the bushing; and one side of the second ball bearing, which is close to the first ball bearing, is provided with a gasket, and the other side of the gasket is propped against a shaft shoulder in the bushing.
Further optimizing: the first ball bearing and the second ball bearing have the same integral structure and comprise a bearing outer ring body, rolling bodies and bearing inner raceways, and the bearing outer raceways are arranged on the inner surface of the bearing outer ring body; the rolling bodies are arranged between the bearing outer raceway and the bearing inner raceway, and the bearing inner raceway is arranged at a position corresponding to the rotor shaft.
Further optimizing: the turbine rotor and the compressor impeller are fixedly arranged on the other end part of the rotor shaft, the compressor impeller and the turbine rotor are distributed at fixed intervals, the front end of the compressor impeller is provided with a mounting groove, one end of the bushing extends into the mounting groove, and the joint of the bushing, which is positioned on the outer surface of one end of the mounting groove, and the mounting groove is sealed by a sealing ring; the other end of the lining is connected with a plug for plugging the installation through hole in a sealing way.
Further optimizing: the rotor shaft is internally and coaxially provided with an axial oil hole, both ends of the axial oil hole are of a sealing structure, and a plurality of first radial oil holes and second radial oil holes are respectively formed in positions, corresponding to the first ball bearings and the second ball bearings, of the rotor shaft.
Further optimizing: an elliptical cavity is formed in the inner surface of the bushing at a position close to the vane pump, the central line of the elliptical cavity and the axis of the rotor shaft are eccentrically distributed, an oil inlet hole is formed in the inner wall of the elliptical cavity, and the other end of the oil inlet hole penetrates through the outer surface of the bushing; an oil outlet is formed in the outer surface of the rotor shaft at the position of the elliptic containing cavity, and two ends of the oil outlet are respectively communicated with the elliptic containing cavity and the axial oil hole.
Further optimizing: the vane pump comprises a plurality of sliding grooves which are formed in the outer surface of the rotor shaft in the elliptical cavity, the sliding grooves are annularly distributed at intervals along the outer surface of the rotor shaft, and the inner ends of the sliding grooves are not communicated with the axial oil holes; the sliding grooves are respectively and slidably connected with a blade, and the outer side surfaces of the blades are kept in contact with the inner surface of the elliptical containing cavity.
Further optimizing: the oil inlet and outlet way comprises an oil inlet core and two oil return cores, the upper ends of the oil inlet cores are arranged in the oil inlet holes, oil outlet grooves are respectively arranged at positions, close to the first ball bearings and the second ball bearings, on the lining, the upper ends of the oil return cores are respectively communicated with the corresponding oil outlet grooves, and the other ends of the oil inlet cores and the oil return cores are communicated with an external oil tank.
Further optimizing: the bearing device is arranged on a supercharger for use, the supercharger comprises a compressor shell, a compressor cover is arranged at the front end of the compressor shell in a sealing manner, an oil tank is arranged outside and comprises an oil cavity, and the oil cavity is arranged between the compressor shell and the compressor cover; an oil hole is formed in the position, close to the oil cavity, on the compressor cover, an air plug is arranged in the oil hole, and a micro hole is formed in the air plug;
one side of the compressor shell, which is far away from the compressor cover, is fixedly arranged on the supporting disc, and the other side of the supporting disc is fixedly provided with a turbine shell; the turbine rotor is arranged in the turbine shell, the inducer is fixedly arranged in the air inlet channel of the compressor shell, and the compressor impeller is arranged in the compressor shell.
The invention also provides a control method of the cantilever type integrated micro-oil high-speed bearing device for the supercharger, which is based on the cantilever type integrated micro-oil high-speed bearing device for the supercharger and comprises the following steps of;
step one, waste gas discharged by an engine enters a turbine shell to drive a turbine rotor to rotate at a high speed, and the turbine rotor rotates to drive a coaxial compressor impeller to rotate at a high speed through a rotor shaft;
the second step, the pressure at the air inlet position of the air compressor cover is atmospheric pressure P0, the air compressor impeller rotates at a high speed to suck air, the pressure at the front end position of the air compressor impeller is P1, P1 is less than P0, the air enters the air compressor shell through the air compressor impeller to be compressed, the pressure at the outlet position of the air compressor shell is P2, and at the moment, P2 is more than P0 and more than P1;
step three, a micro hole is arranged in the air plug, the pressure in the oil cavity is kept consistent with the atmospheric pressure through the micro hole, and the pressure in the oil cavity is P0;
the blade divides the elliptical containing cavity into a plurality of containing cavities with adjustable sizes, and when the blade moves to the upper position between the oil inlet hole and the oil outlet hole, the volume of the containing cavity is reduced, and the position is marked as a point A; when the blade moves to a position below the position between the oil inlet and the oil outlet, the volume of the containing cavity is increased, and the position is marked as a point B;
step four, the rotor shaft rotates clockwise to drive the vane pump to work, when each vane of the vane pump rotates from the point A to the point B, the sealing volume of the containing cavity is changed from small to large, the pressure is reduced to P3, and P3 is lower than the atmospheric pressure P0, and when the containing cavity passes through the oil inlet hole, the pressure difference and the oil inlet oil core absorb the lubricating oil in the oil cavity to finish the oil absorption process;
step five, when the blade rotates from the point B to the point A, the sealing volume is changed from large to small, the pressure is increased to P4, and when the containing cavity passes through the oil outlet, lubricating oil in the containing cavity is pressed into the axial oil hole through the oil outlet, so that the oil pressing is completed;
step six, lubricating oil in the axial oil holes is conveyed to the positions of the first ball bearing and the second ball bearing through the first radial oil holes and the second radial oil holes and lubricates the positions of the first ball bearing and the second ball bearing;
and seventhly, the redundant lubricating oil at the positions of the first ball bearing and the second ball bearing flows back into the oil cavity through the corresponding oil outlet groove and the corresponding oil return oil core.
The invention adopts the technical scheme and has the following beneficial effects:
according to the invention, the bearing for supporting the rotor shaft can be adjusted to the front end of the compressor impeller from the position of the intermediate body, and the axial span of the compressor impeller and the turbine rotor is reduced, so that the whole structure of the supercharger is more compact.
2. An oil cavity is formed between the compressor shell and the compressor cover, and lubricating oil for lubricating each ball bearing is stored through the oil cavity; an external oil inlet and return pipeline is not required to be arranged; the ball bearing can bear axial load and radial load, and a thrust bearing is not needed, so that the whole structure is simple; the ball bearing is made of ceramic materials, so that the overall weight is greatly reduced, and the responsiveness is improved; and the ball bearing has small contact area and needs less lubricating oil, so that the long-time operation requirement can be met by only storing a small amount of lubricating oil in the oil cavity.
3. According to the invention, the vane pump is arranged between the rotor shaft and the bushing, the rotor shaft rotates to drive the vane pump to work, the vane pump works to drive each vane to move, at the moment, the vanes move annularly in the elliptical accommodating cavity, the sealing volume of each accommodating cavity can be adjusted, so that pressure difference is generated, oil absorption and oil pressing operation of lubricating oil are completed through the pressure difference, the lubricating oil can be conveyed to each ball bearing through the axial oil hole, the first radial oil hole and the second radial oil hole and is lubricated, and the structure and the working characteristics of the supercharger are utilized to realize bearing lubrication.
The invention will be further described with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic diagram of the operation of a conventional turbocharger in the background of the invention;
FIG. 2 is a schematic view of a conventional turbocharger according to the background of the invention;
FIG. 3 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 4 is a schematic view of a support bearing assembly according to an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a cross-sectional view taken along the direction B-B in FIG. 3;
fig. 7 is a schematic view showing a structure in which the bearing device is mounted on a supercharger in the embodiment of the present invention;
fig. 8 is a partial enlarged view at C in fig. 7.
In the figure: 1-an intermediate; 2-floating bearings; 3-thrust bearing; 4-a compressor housing; 5-a compressor housing; 6-oil inlet; 7-an oil return port; 8-a compressor wheel; 81-mounting slots; 9-a turbine rotor; 10-turbine shell; 11-an oil chamber; 12-a bushing; 13-a spring; 14-a first ball bearing; 141-a bearing outer ring body; 142-rolling elements; 143-inner race of bearing; 15-a second ball bearing; 16-a gasket; 17-a sealing ring; 18-leaf blades; 19-an air plug; 20-wind guiding wheel; 21-feeding an oil core; 22-an axial oil hole; 23-a first radial oil hole; 24-a second radial oil hole; 25-an oil return core; 26-an oil outlet groove; 27-vane pump; 28-plugs; 29-positioning blocks; 30-supporting plate; 31-rotor shaft; 32-mounting through holes; 33-an elliptical cavity; 34-an oil inlet hole; 35-an oil outlet hole; 36-chute.
Detailed Description
As shown in fig. 1-8: the utility model provides an integrated little oily high-speed bearing device of cantilever type for booster, includes rotor shaft 31, rotor shaft 31 is gone up and is close to its front end position department cover and is equipped with inducer 20, inducer 20's mid-mounting has the support bearing subassembly that is used for supporting rotor shaft 31 and carries out pivoted, be provided with the business turn over oil circuit on the support bearing subassembly, business turn over oil circuit's the other end and peripheral hardware oil tank intercommunication.
The support bearing assembly comprises a bushing 12, the bushing 12 is fixedly arranged on the inducer 20, a mounting through hole 32 is formed in the bushing 12, the mounting through hole 32 is a stepped hole, and a first ball bearing 14 and a second ball bearing 15 are respectively arranged in the mounting through hole 32 near the two ends of the mounting through hole.
The first ball bearing 14 and the second ball bearing 15 are arranged between the bushing 12 and the rotor shaft 31, and a vane pump 27 is arranged between the first ball bearing 14 and the second ball bearing 15 and positioned on the rotor shaft 31.
The spring 13 is arranged on one side of the first ball bearing 14, which is close to the second ball bearing 15, the other end of the spring 13 is propped against a shaft shoulder in the bushing 12, and the spring 13 outputs elasticity for propping the first ball bearing 14, so that the first ball bearing 14 has a force for moving towards one side, which is far away from the second ball bearing 15.
A gasket 16 is installed on one side, close to the first ball bearing 14, of the second ball bearing 15, the other side of the gasket 16 is in propping connection with a shaft shoulder in the bushing 12, and the thickness of the gasket 16 can be adjusted to adjust the axial position of the second ball bearing 15 after installation.
The first ball bearing 14 and the second ball bearing 15 have the same overall structure and each comprise a bearing outer ring body 141, a rolling body 142 and a bearing inner raceway 143, wherein the bearing outer raceway is arranged on the inner surface of the bearing outer ring body 141; the rolling elements 142 are mounted between the bearing outer race and the bearing inner race 143, and the bearing inner race 143 is provided at a position corresponding to the rotor shaft 31.
In this way, the bearing inner raceways 143 of the first ball bearing 14 and the second ball bearing 15 are respectively arranged on the rotor shaft 31, so that the first ball bearing 14 and the second ball bearing 15 are directly assembled on the rotor shaft 31, and the assembly and the installation are convenient.
And the first ball bearing 14 is enabled to bear an axial load generated during rotation of the turbocharger by the action of the spring 13; the second ball bearing 15 is used for supporting the rotor shaft 31 to rotate, which is convenient for use.
In this embodiment, the first ball bearing 14 and the second ball bearing 15 are made of ceramic materials, so that the overall weight is greatly reduced, and the responsiveness is improved.
In this embodiment, the diameter of the inner surface of the mounting through hole 32 in the bush 12 is larger than the diameter of the outer surface of the rotor shaft 31.
In this embodiment, the rotor shaft 31 is fixedly provided with the turbine rotor 9 at the other end thereof, the rotor shaft 31 is provided with the compressor impeller 8 between the turbine rotor 9 and the bushing 12, the compressor impeller 8 is sleeved on the rotor shaft 31, and the side of the compressor impeller 8 far away from the bushing 12 is matched with the rotor shaft 31 through a shaft shoulder to realize positioning.
In the present embodiment, the spacing between the compressor wheel 8 and the turbine rotor 9 is fixed.
The front end of the compressor impeller 8 is provided with a mounting groove 81, a positioning block 29 is coaxially arranged in the mounting groove 81, the positioning block 29 is fixedly mounted on the rotor shaft 31 in an interference fit mode, one side of the positioning block 29 is propped against the compressor impeller 8, and the compressor impeller 8 is fixedly mounted on the rotor shaft 31 through the positioning block 29, so that the assembly and the installation are convenient.
In this embodiment, the outer surface of the positioning block 29 is smaller in size than the inner surface of the mounting through hole 32, and the positioning block 29 is disposed in the mounting through hole 32.
One end of the bushing 12, which is close to the compressor impeller 8, extends into the mounting groove 81, a plurality of sealing grooves are formed in the outer surface of one end of the bushing 12, which is located in the mounting groove 81, sealing rings 17 are arranged in the sealing grooves, and the sealing rings 17 are used for sealing the joint of the bushing 12 and the mounting groove 81.
By such a design, the seal ring 17 can be used to seal the joint between the bush 12 and the mounting groove 81, thereby preventing external air from entering the mounting through hole 32 through the gap between the bush 12 and the mounting groove 81, and improving the use effect.
The end of the bushing 12 far away from the compressor impeller 8 is connected with a plug 28 in a sealing manner, and the plug 28 is used for sealing and plugging the end of the mounting through hole 32 far away from the compressor impeller 8.
By the design, the two ends of the installation through hole 32 in the bushing 12 can be respectively sealed through the matching of the plug 28 and the sealing ring 17, so that the use effect is improved.
The rotor shaft 31 is internally provided with an axial oil hole 22, the axial oil hole 22 is coaxially arranged in the rotor shaft 31, and both ends of the axial oil hole 22 are of a sealing structure.
A plurality of first radial oil holes 23 are formed in the rotor shaft 31 at positions close to the first ball bearings 14, and the plurality of first radial oil holes 23 are radially distributed; the inner end of the first radial oil hole 23 communicates with the axial oil hole 22, and the outer end of the first radial oil hole 23 communicates with the bearing inner race 143 of the first ball bearing 14.
A plurality of second radial oil holes 24 are formed in the rotor shaft 31 at positions close to the second ball bearings 15, and the plurality of second radial oil holes 24 are radially distributed; the inner end of the second radial oil hole 24 communicates with the axial oil hole 22, and the outer end of the second radial oil hole 24 communicates with the bearing inner race 143 of the second ball bearing 15.
By such design, the lubricating oil in the axial oil hole 22 flows to the bearing inner raceways 143 of the first ball bearing 14 and the second ball bearing 15 through the first radial oil hole 23 and the second radial oil hole 24 respectively, so that the first ball bearing 14 and the second ball bearing 15 are lubricated, and the use effect is improved.
An elliptic containing cavity 33 is formed on the inner surface of the bushing 12 at a position close to the vane pump 27, the central line of the elliptic containing cavity 33 and the axis of the rotor shaft 31 are eccentrically distributed, an oil inlet hole 34 is formed on the inner wall of the elliptic containing cavity 33, and the other end of the oil inlet hole 34 penetrates through the outer surface of the bushing 12.
An oil outlet hole 35 is formed in the outer surface of the rotor shaft 31 at the position of the elliptical cavity 33, the outer end of the oil outlet hole 35 is communicated with the elliptical cavity 33, and the inner end of the oil outlet hole 35 is communicated with the axial oil hole 22.
The vane pump 37 includes a plurality of sliding grooves 36, the sliding grooves 36 are formed on the outer surface of the rotor shaft 31 in the elliptical cavity 33, and the sliding grooves 36 are annularly and alternately arranged along the outer surface of the rotor shaft 31.
The outer ends of the sliding grooves 36 penetrate through the outer surface of the rotor shaft 31, respectively, and the inner ends of the sliding grooves 36 are not communicated with the axial oil holes 22.
The sliding grooves 36 are respectively and slidably connected with the blades 18, the overall height of the blades 18 is matched with the depth of the sliding grooves 36, and the outer side surfaces of the blades 18 are kept in contact with the inner surface of the elliptical cavity 33.
In such design, the elliptical containing cavity 33 can be divided into a plurality of size-adjustable containing cavities through the blades 18, the rotor shaft 31 rotates to drive the blades 18 to move, and when the blades 18 move to the upper position between the oil inlet holes 34 and the oil outlet holes 35, the volume of the containing cavity is reduced, and the position is marked as point A; when the vane 18 moves to a position below between the oil inlet hole 34 and the oil outlet hole 35, the volume of the chamber becomes large, which is marked as point B.
When the vane pump 27 works, the rotor shaft 31 rotates clockwise to drive each vane 18 to move, at this time, when the vane 18 rotates from the point a to the point B, the sealing volume of the cavity is changed from small to large, the pressure is reduced to P3, and P3 is lower than the atmospheric pressure P0, and when the cavity passes through the oil inlet 34, external lubricating oil is sucked into the vane pump 27 through the oil inlet 34, so as to complete the oil suction process.
When the vane 18 is turned from the point B to the point A, the sealing volume is reduced from the large to the small, the pressure is increased to P4, and when the containing cavity passes through the oil outlet 35, the lubricating oil in the containing cavity is pressed into the axial oil hole 22 through the oil outlet 35, so that the oil pressing is finished, and the use is convenient.
The lubricating oil in the axial oil hole 22 flows to the bearing inner raceways 143 of the first ball bearing 14 and the second ball bearing 15 through the first radial oil hole 23 and the second radial oil hole 24 respectively, so that the first ball bearing 14 and the second ball bearing 15 are lubricated, and the use effect is improved.
The oil inlet and outlet path comprises an oil inlet oil core 21, the upper end of the oil inlet oil core 21 is arranged in an oil inlet hole 34, and the other end of the oil inlet oil core 21 is communicated with an external oil tank.
By the design, the lubricating oil in the peripheral oil tank can enter the oil inlet hole 34 through the oil inlet oil core 21, and then the lubricating oil is conveyed into the axial oil hole 22 through the pressure difference generated by the working of the vane pump 27.
The oil inlet and outlet way further comprises two oil return oil cores 25, oil outlet grooves 26 are respectively formed in positions, close to the first ball bearings 14 and the second ball bearings 15, on the lining 12, the upper ends of the oil return oil cores 25 are respectively communicated with the corresponding oil outlet grooves 26, and the lower ends of the oil return oil cores 25 are respectively communicated with an external oil tank.
The vane pump 27 works to generate pressure difference, sucks lubricating oil in an external oil tank through the oil inlet oil core 21, then conveys the lubricating oil into the axial oil hole 22 through the oil outlet hole 35, and conveys the lubricating oil to the positions of the first ball bearing 14 and the second ball bearing 15 through the first radial oil hole 25 and the second radial oil hole 25, so as to lubricate the first ball bearing 14 and the second ball bearing 15.
Excess lubricating oil at the positions of the first ball bearing 14 and the second ball bearing 15 flows into the corresponding oil outlet grooves 26, and then flows back into the peripheral oil tank through the corresponding return oil core 25.
The cantilever type integrated micro-oil high-speed bearing device for the supercharger is installed on the supercharger for use, the specific structure of the supercharger is shown in fig. 5, the supercharger comprises a compressor housing 4, a compressor cover 5 is installed at the front end of the compressor housing 4 in a sealing mode, an external oil tank comprises an oil cavity 11, and the oil cavity 11 is arranged between the compressor housing 4 and the compressor cover 5.
The compressor housing 4 is fixedly mounted on the support plate 30 on one side far away from the compressor housing 5, and the turbine housing 10 is fixedly mounted on the other side of the support plate 30.
In the present embodiment, the turbine rotor 9 is disposed in the turbine housing 10, the inducer 20 is fixedly mounted in the air intake passage of the compressor housing 4, i.e., the liner 12 is disposed in the air intake passage of the compressor housing 4, and the compressor wheel 8 is disposed in the compressor housing 4.
In this embodiment, the air inlet of the turbine housing 10 is communicated with the exhaust gas outlet of the engine, and the exhaust gas discharged from the engine enters the turbine housing 10 to drive the turbine rotor 9 to rotate at a high speed, and the turbine rotor 9 rotates to drive the coaxial compressor impeller 8 to rotate at a high speed through the rotor shaft 31, and at this time, the support bearing assembly is used for supporting the rotor shaft 31 to rotate, so that the use effect is improved.
An oil filling hole is formed in the position, close to the oil cavity 11, of the compressor cover 5, an air plug 19 is arranged in the oil filling hole, and lubricating oil is filled into the oil cavity 11 through the air plug 19.
The air plug 19 is provided with a micro hole to keep the air pressure in the oil chamber 11 consistent with the atmospheric pressure, and the pressure in the oil chamber 11 is P0.
The control method of the cantilever type integrated micro-oil high-speed bearing device for the supercharger is based on the cantilever type integrated micro-oil high-speed bearing device for the supercharger, and comprises the following steps of;
firstly, an air inlet of a turbine shell 10 is communicated with an exhaust gas discharge port of an engine, an air outlet of a compressor shell 4 is communicated with the air inlet of the engine, and at the moment, exhaust gas discharged by the engine enters the turbine shell 10 and then drives a turbine rotor 9 to rotate at a high speed, and the turbine rotor 9 rotates to drive a coaxial compressor impeller 8 to rotate at a high speed through a rotor shaft 31.
And secondly, the pressure at the air inlet position of the air compressor cover 5 is atmospheric pressure P0, the air is sucked by the high-speed rotation of the air compressor impeller 8, at the moment, the pressure at the front end position of the air compressor impeller 8 is P1, P1 is less than P0, the air enters the air compressor shell 4 through the air compressor impeller 8, the air is compressed to increase the pressure, and the pressure at the outlet position of the air compressor shell 4 is P2, at the moment, P2 is more than P0 and more than P1.
And step three, a micro hole is formed in the air plug 19, and the pressure in the oil chamber 11 is kept consistent with the atmospheric pressure through the micro hole, and the pressure in the oil chamber 11 is P0.
And step four, the rotor shaft 31 rotates clockwise to drive the vane pump 27 to work, when each vane 18 of the vane pump 27 rotates from the point A to the point B, the sealing volume of the cavity is changed from small to large, the pressure is reduced to P3, the P3 is lower than the atmospheric pressure P0, and when the cavity passes through the oil inlet hole 34, the pressure difference and the oil inlet oil core 21 suck the lubricating oil in the oil cavity 11, so as to complete the oil suction process.
And fifthly, when the vane 18 is turned from the point B to the point A, the sealing volume is changed from large to small, the pressure is increased to P4, and when the containing cavity passes through the oil outlet 35, the lubricating oil in the containing cavity is pressed into the axial oil hole 22 through the oil outlet 35, so that the pressure oil is finished.
In the sixth step, the lubricating oil in the axial oil hole 22 is supplied to the positions of the first ball bearing 14 and the second ball bearing 15 through the first radial oil hole 25 and the second radial oil hole 25, and lubricates the first ball bearing 14 and the second ball bearing 15.
And step seven, superfluous lubricating oil at the positions of the first ball bearing 14 and the second ball bearing 15 flows into the corresponding oil outlet grooves 26, and then flows back into the oil cavity 11 through the corresponding return oil core 25.
Alterations, modifications, substitutions and variations of the embodiments herein will be apparent to those of ordinary skill in the art in light of the teachings of the present invention without departing from the spirit and principles of the invention.

Claims (10)

1. Cantilever type integrated micro-oil high-speed bearing device for supercharger, comprising a rotor shaft (31), and being characterized in that: an inducer (20) is sleeved on the outer surface of the rotor shaft (31) and close to the front end of the rotor shaft, a support bearing assembly for supporting the rotor shaft (31) to rotate is arranged in the middle of the inducer (20), an oil inlet and outlet way is arranged on the support bearing assembly, and the other end of the oil inlet and outlet way is communicated with an external oil tank; the support bearing assembly comprises a bushing (12) fixedly installed on the inducer (20), an installation through hole (32) is formed in the bushing (12), a first ball bearing (14) and a second ball bearing (15) are respectively installed between the position, close to two ends, of the installation through hole (32) and a rotor shaft (31), a vane pump (27) is arranged on the rotor shaft (31) between the first ball bearing (14) and the second ball bearing (15), and the vane pump (27) works to generate pressure difference and convey lubricating oil to the first ball bearing (14) and the second ball bearing (15) through oil inlet and outlet ways to lubricate the first ball bearing and the second ball bearing (15).
2. The cantilever-type integrated micro-oil high-speed bearing device for a supercharger according to claim 1, wherein: a spring (13) is arranged on one side, close to the second ball bearing (15), of the first ball bearing (14), and the other end of the spring (13) is propped against a shaft shoulder in the bushing (12); a gasket (16) is arranged on one side, close to the first ball bearing (14), of the second ball bearing (15), and the other side of the gasket (16) is in propping connection with a shaft shoulder in the bushing (12).
3. A cantilever-type integrated micro-oil high-speed bearing device for a supercharger according to claim 2, wherein: the first ball bearing (14) and the second ball bearing (15) have the same integral structure and comprise a bearing outer ring body (141), rolling bodies (142) and a bearing inner raceway (143), and the bearing outer raceway is arranged on the inner surface of the bearing outer ring body (141); the rolling bodies (142) are arranged between the bearing outer raceway and the bearing inner raceway (143), and the bearing inner raceway (143) is arranged at a position corresponding to the rotor shaft (31).
4. A cantilever-type integrated micro-oil high-speed bearing device for a supercharger according to claim 3, wherein: the turbine rotor (9) and the compressor impeller (8) are fixedly arranged on the other end part of the rotor shaft (31), the compressor impeller (8) and the turbine rotor (9) are distributed at fixed intervals, the front end of the compressor impeller (8) is provided with a mounting groove (81), one end of the bushing (12) extends into the mounting groove (81), and the joint of the bushing (12) and the mounting groove (81) is sealed by a sealing ring (17) between the outer surface of one end of the mounting groove (81); the other end of the bushing (12) is connected with a plug (28) for sealing the mounting through hole (32) in a sealing way.
5. The cantilever-type integrated micro-oil high-speed bearing device for a supercharger of claim 4, wherein: the rotor shaft (31) is internally and coaxially provided with an axial oil hole (22), both ends of the axial oil hole (22) are of a sealing structure, and a plurality of first radial oil holes (23) and second radial oil holes (24) are respectively formed in positions, corresponding to the first ball bearings (14) and the second ball bearings (15), of the rotor shaft (31).
6. The cantilever type integrated micro-oil high-speed bearing device for a supercharger of claim 5, wherein: an elliptical cavity (33) is formed in the inner surface of the bushing (12) at a position close to the vane pump (27), the central line of the elliptical cavity (33) and the axis of the rotor shaft (31) are eccentrically distributed, an oil inlet hole (34) is formed in the inner wall of the elliptical cavity (33), and the other end of the oil inlet hole (34) penetrates through the outer surface of the bushing (12); an oil outlet (35) is formed in the outer surface of the rotor shaft (31) and located at the position of the elliptical containing cavity (33), and two ends of the oil outlet (35) are respectively communicated with the elliptical containing cavity (33) and the axial oil hole (22).
7. The cantilever-type integrated micro-oil high-speed bearing device for a supercharger of claim 6, wherein: the vane pump (37) comprises a plurality of sliding grooves (36), the sliding grooves (36) are formed in the outer surface of the inner rotor shaft (31) of the elliptical containing cavity (33), the sliding grooves (36) are annularly and alternately distributed along the outer surface of the rotor shaft (31), and the inner ends of the sliding grooves (36) are not communicated with the axial oil holes (22); the sliding grooves (36) are respectively and slidably connected with the blades (18), and the outer side surfaces of the blades (18) are kept in contact with the inner surface of the elliptical containing cavity (33).
8. The cantilever type integrated micro-oil high-speed bearing device for a supercharger of claim 7, wherein: the oil inlet and outlet way comprises an oil inlet core (21) and two oil return cores (25), the upper ends of the oil inlet cores (21) are arranged in an oil inlet hole (34), oil outlet grooves (26) are respectively formed in positions, close to the first ball bearings (14) and the second ball bearings (15), on the lining (12), the upper ends of the oil return cores (25) are respectively communicated with the corresponding oil outlet grooves (26), and the other ends of the oil inlet cores (21) and the oil return cores (25) are communicated with an external oil tank.
9. The cantilever-type integrated micro-oil high-speed bearing device for a supercharger of claim 8, wherein: the bearing device is arranged on a supercharger for use, the supercharger comprises a compressor shell (4), a compressor cover (5) is arranged at the front end of the compressor shell (4) in a sealing manner, an oil tank is arranged outside and comprises an oil cavity (11), and the oil cavity (11) is arranged between the compressor shell (4) and the compressor cover (5); an oil filling hole is formed in the position, close to the oil cavity (11), of the compressor cover (5), an air plug (19) is arranged in the oil filling hole, and a micro hole is formed in the air plug (19);
one side of the compressor shell (4) far away from the compressor cover (5) is fixedly arranged on a supporting disc (30), and a turbine shell (10) is fixedly arranged on the other side of the supporting disc (30); the turbine rotor (9) is arranged in the turbine shell (10), the inducer (20) is fixedly arranged in the air inlet channel of the compressor shell (4), and the compressor impeller (8) is arranged in the compressor shell (4).
10. A control method of a cantilever type integrated micro-oil high-speed bearing device for a supercharger, based on the cantilever type integrated micro-oil high-speed bearing device for a supercharger according to claim 9, characterized in that: the control method comprises the following steps;
step one, waste gas discharged by an engine enters a turbine shell (10) to drive a turbine rotor (9) to rotate at a high speed, and the turbine rotor (9) rotates to drive a coaxial compressor impeller (8) to rotate at a high speed through a rotor shaft (31);
the second step, the pressure at the air inlet position of the air compressor cover (5) is atmospheric pressure P0, the air compressor impeller (8) rotates at a high speed to suck air, the pressure at the front end position of the air compressor impeller (8) is P1, P1 is less than P0, the air enters the air compressor shell (4) through the air compressor impeller (8) to be compressed, and the pressure at the outlet position of the air compressor shell (4) is P2, wherein P2 is more than P0 and more than P1;
step three, a micro hole is arranged in the air plug (19), the pressure in the oil cavity (11) is kept consistent with the atmospheric pressure through the micro hole, and the pressure in the oil cavity (11) is P0;
the blades (18) divide the elliptical containing cavity (33) into a plurality of size-adjustable containing cavities, and when the blades (18) move to the upper position between the oil inlet hole (34) and the oil outlet hole (35), the volume of the containing cavity is reduced, and the position is marked as a point A; when the vane (18) moves to a position below the oil inlet (34) and the oil outlet (35), the volume of the containing cavity is increased, and the position is marked as a point B;
step four, the rotor shaft (31) drives the vane pump (27) to work according to clockwise rotation, when each vane (18) of the vane pump (27) rotates from the point A to the point B, the sealing volume of the containing cavity is changed from small to large, the pressure is reduced to P3, and P3 is lower than the atmospheric pressure P0, and when the containing cavity passes through the oil inlet hole (34), the pressure difference and the oil inlet oil core (21) suck lubricating oil in the oil cavity (11) to finish the oil suction process;
step five, when the blade (18) rotates from the point B to the point A, the sealing volume is changed from large to small, the pressure is increased to P4, and when the cavity passes through the oil outlet hole (35), lubricating oil in the cavity is pressed into the axial oil hole (22) through the oil outlet hole (35), so that the oil pressing is completed;
step six, lubricating oil in the axial oil hole (22) is conveyed to the positions of the first ball bearing (14) and the second ball bearing (15) through the first radial oil hole (25) and the second radial oil hole (25) and used for lubricating the positions;
and seventhly, the redundant lubricating oil at the positions of the first ball bearing (14) and the second ball bearing (15) flows back into the oil cavity (11) through the corresponding oil outlet groove (26) and the corresponding oil return oil core (25).
CN202311587750.9A 2023-11-27 2023-11-27 Cantilever type integrated micro-oil high-speed bearing device for supercharger and control method Pending CN117345682A (en)

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CN202311587750.9A CN117345682A (en) 2023-11-27 2023-11-27 Cantilever type integrated micro-oil high-speed bearing device for supercharger and control method

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Application Number Priority Date Filing Date Title
CN202311587750.9A CN117345682A (en) 2023-11-27 2023-11-27 Cantilever type integrated micro-oil high-speed bearing device for supercharger and control method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118407932A (en) * 2024-06-25 2024-07-30 宁波威孚天力增压技术股份有限公司 Press shell structure for turbocharger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118407932A (en) * 2024-06-25 2024-07-30 宁波威孚天力增压技术股份有限公司 Press shell structure for turbocharger

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