CN109944871A - A kind of Hydrodynamic transverse bearing and centrifugal pump - Google Patents
A kind of Hydrodynamic transverse bearing and centrifugal pump Download PDFInfo
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- CN109944871A CN109944871A CN201910095029.5A CN201910095029A CN109944871A CN 109944871 A CN109944871 A CN 109944871A CN 201910095029 A CN201910095029 A CN 201910095029A CN 109944871 A CN109944871 A CN 109944871A
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- bearing body
- axis stream
- bearing
- pressurized construction
- hydrodynamic
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Abstract
The present invention provides a kind of Hydrodynamic transverse bearing of tape spool stream pressurized construction and centrifugal pumps.The Hydrodynamic transverse bearing, including axle sleeve and with the bearing body that cooperates in the axle sleeve, the bearing body includes two opposing end surfaces and the side between two opposing end surface, the side of the bearing body is equipped with axis stream pressurized construction, at least one end face of the axis stream pressurized construction in two opposing end surface and the middle section far from the side.Compared with prior art, the present invention increases supercharging device in Hydrodynamic transverse bearing front, inhibits the cavitation phenomenon being easy to produce in general hydrodynamic bearing, significantly improves the reliability of bearing.
Description
Technical field
The present invention relates to a kind of bearing arrangements, should more particularly to a kind of Hydrodynamic transverse bearing and a kind of use
The centrifugal pump of Hydrodynamic transverse bearing.
Background technique
Centrifugal pump has the characteristics that long working life, head curve are flat, transporting power is strong, has been widely used in aviation
The industries such as space flight, petrochemical industry, chemical fertilizer pharmacy.
Centrifugal pump mostly uses greatly rolling bearings or plain bearings as rotation shaft support bearing.But rolling bearing or sliding axle
The failure for usually having following defects that and for example generating due to continuous wear of working surface metal is held, lubricant pair is being used
There are lubricant aging, high temperature dilution etc. are bad when bearing is lubricated.
Thus begin to use a kind of novel hydrodynamic bearing in centrifugal pump.Hydrodynamic bearing is one kind with sticky liquid
Non-contact type sliding bearing of the body as lubricant.Liquid when hydrodynamic bearing is rotated using shaft in bearing wedge gap
The film pressure of formation carrys out support loads.Compared to rolling bearing and sliding bearing, hydrodynamic bearing, which has, rotates steady, work
Make the advantages that reliable, noise is lower, vibration is small, small in size, light-weight.Hydrodynamic bearing is using systematic working medium as lubrication
Agent, there is no need to consider pollution of the lubricant to system.And under the premise of fully ensuring that systematic working medium lubrication, the work of bearing
Make surface to be separated by systematic working medium without directly contacting, surface abrasion can be greatly reduced.
But inventors have found that hydrodynamic bearing is easy to produce cavitation phenomenon when rotating at high speed." cavitation " refers to liquid
The phenomenon that local pressure leads to liquid gasification lower than the corresponding saturation pressure of fluid temperature in body medium.When shaft rotates, meeting
Higher-pressure region and low-pressure area are formed in cavity between shaft and hydrodynamic bearing.And with the gradually increasing of shaft revolving speed
Add, the pressure of low-pressure area correspondingly gradually decreases.When the liquid pressure in the cavity mesolow area between shaft and hydrodynamic bearing
Power is lower than when carrying out the corresponding saturation pressure of flowing liquid, and cavitation phenomenon will occur in the cavities.
Since the lubrication gap between shaft and hydrodynamic bearing is very small, the heat generated in shaft rotation process
The temperature of the liquid film in low-pressure area is also improved, corresponding liquid film saturation pressure force value also rises with it, and increases cavitation phenomenon hair
A possibility that raw.When cavitation occurs for liquid, partially liq variation is gas, since the ratio volume of gas is much larger than liquid, because
This gas quickly occupies most of volume in cavity, and liquid film support force, which declines rapidly, even to disappear, so that it is dynamic to affect liquid
Last item holds stability at high speeds, even can cause to fail when serious.
Summary of the invention
In view of this, a primary object of the present invention is to provide a kind of Hydrodynamic transverse bearing, it can be certain
Cavitation phenomenon is avoided the occurrence of in degree.
Another main purpose of the invention is to provide a kind of centrifugal pump, which has used aforesaid liquid dynamic pressure diameter
To bearing.
Based on this, hydrodynamic bearing provided in an embodiment of the present invention includes axle sleeve and the bearing sheet with axle sleeve cooperation
Body, the bearing body include two opposing end surfaces and the side between two opposing end surface, the side of the bearing body
Face is equipped with axis stream pressurized construction, and at least one end face in two opposing end surface of the axis stream pressurized construction is simultaneously remote
Middle section from the side.
In general, the axle sleeve and the bearing body are cylinder-like structure on the whole, when in use, in the axle sleeve
The bearing body is set, shaft is set in the bearing body.In some embodiments, the axle sleeve and the bearing body
It is mutually independent and forms pre- gap between, the bearing body is connect with the shaft by pin key, described
Dynamic pressure liquid film is formed between the outer surface of bearing body and the inner surface of the axle sleeve to provide bearing capacity, the axis stream increases at this time
Laminated structure is arranged on the lateral surface of the bearing body.
A row or multi-row axis can be set generally along the side circumferential array of the bearing body in the axis stream pressurized construction
Flow pressurized construction.When row's axis stream pressurized construction is only arranged, the row axis stream pressurized construction is close to the one of the bearing body
A end face setting；That is, compared to the middle section of the bearing body side, the row axis stream pressurized construction is closer to the axis
Hold the end face of ontology.It is multiple rows of when being arranged, such as when two rows of axis stream pressurized constructions, wherein row's axis stream pressurized construction is close to the axis
The end face setting in two opposing end surfaces of ontology is held, another row's axis stream pressurized construction is another in two opposing end surface
One end face setting, and two rows of axis stream pressurized constructions are axially symmetric.
There are many ways of realization of the axis stream pressurized construction.In some embodiments, the axis stream pressurized construction includes
Along the blade of the side circumferential array of the bearing body.Alternatively, in further embodiments, the axis stream pressurized construction includes
Along the screw thread of the side circumferential array of the bearing body.When along the circumferential array of the bearing body, the blade or
The extending direction of the screw thread is not axial parallel with the bearing body, but with the axial direction of the bearing body in certain
Tilt angle.In some embodiments, the inclined direction of the blade or the screw thread relative to the bearing body axial direction
It is opposite with the direction of rotation of the shaft.
In some embodiments, when arranging blade or screw thread in the circumferential direction of the bearing body lateral surface, the blade
Or the screw thread is there is still a need between the bearing body and the axle sleeve, therefore after the blade or the screw thread is arranged
The radial dimension of the bearing body should be no more than the not set blade or the radial ruler of the bearing body of the screw thread
It is very little.For this purpose, it can be set as taper table top in the part close to two opposing end surface of the bearing body lateral surface, along
From the middle section of the bearing body side to the direction of two opposing end surface, the cross-sectional area of the taper table top is gradually
It reduces.That is, the bearing body forms similar fusiform cylinder-like structure broad in the middle, that both ends are small.The circumferential direction
The blade or screw thread of arrangement are set on the taper table top.
In further embodiments, when arranging blade or screw thread in the circumferential direction of the bearing body medial surface, the leaf
Piece or the screw thread are there is still a need between the bearing body and the shaft, therefore after the blade or the screw thread is arranged
The radial dimension of the bearing body should be no more than the radial direction of the bearing body of the not set blade or the screw thread
Size.For this purpose, taper table top, edge can be set as in the part close to two opposing end surface of the bearing body medial surface
From the middle section of the bearing body side to the direction of two opposing end surface, the cross-sectional area of the taper table top by
It is cumulative big.That is, the bearing body forms intermediate similar tubaeform cylinder-like structure small, both ends are big.The week
It is set on blade from the taper table top to arrangement or screw thread.
After the axis stream pressurized construction is set on the bearing body, the axis stream pressurized construction and respective side it is described
End face is concordant or the axis stream pressurized construction is shorter than the end face of respective side.That is, row's axis stream increasing ought only be arranged
When laminated structure, the row axis stream pressurized construction can't extend beyond adjoining with the row axis stream pressurized construction in the axial direction
The bearing body end face.Similarly, when two rows of axis stream pressurized constructions are arranged, wherein row's axis stream pressurized construction is in axis
The end face of the bearing body adjoining with the row axis stream pressurized construction, and another row's axis can't be extended beyond upwards
Stream pressurized construction will not extend beyond the bearing body adjoining with another row's axis stream pressurized construction in the axial direction
End face.
In some embodiments, tipper is additionally provided on the side of the bearing body, the tipper is arranged described
Inside of the axis stream pressurized construction close to the flanking central region.That is, compared to the axis stream pressurized construction, it is described to incline
Middle section of the skewed slot closer to the side.In addition, similar with the axis stream pressurized construction, the tipper is along the bearing
The side circumferential array of ontology.When along the circumferential array of the bearing body, the extending direction of the tipper not with
The axial direction of the bearing body is parallel, but is in certain tilt angle with the axial direction of the bearing body.
When the tipper includes along two rows of tippers of the side circumferential array of the bearing body, the two rows are inclined
Skewed slot is axially symmetric.
The tipper can use rectangular section slot, triangular section channel, trapezoid cross section slot, stepped groove, horizontal semicircle
At least one of column slot or tapered half-cone slot.
In some embodiments, multiple layer metal paillon, the multilayer metal foil are additionally provided on the side of the bearing body
The axis stream pressurized construction is arranged in close to the inside in the flanking central region in piece.That is, increasing compared to the axis stream
Laminated structure, middle section of the multiple layer metal paillon closer to the side.In addition, it is similar with the axis stream pressurized construction,
Side circumferential array of the multiple layer metal paillon along the bearing body.Side circumferential array along the bearing body is two rows of
When multiple layer metal paillon and two rows of axis stream pressurized constructions, row's multiple layer metal paillon and row's axis stream pressurized construction are located at the axis
It holds between the flanking central region of ontology and an end face, another row's multiple layer metal paillon and another row's axis stream pressurized construction are located at
Between the flanking central region and another end face of the bearing body.It include along the bearing sheet in the multiple layer metal paillon
When two rows of multiple layer metal paillons of the side circumferential array of body, the two rows multilayer metal foil piece is axially symmetric.
The multiple layer metal paillon can use arbitrary form metallic elastic paillon, and such as wave pattern is bubbled form, cantilever
One of form or form of springs.
In addition, a kind of centrifugal pump provided in an embodiment of the present invention includes Hydrodynamic axis described in any of the above-described technical solution
It holds.
Above-mentioned Hydrodynamic transverse bearing has the advantages that when the revolving speed of the shaft is lower, the axis stream increases
Laminated structure can generate pumping effect, thus between the Hydrodynamic transverse bearing and the working surface of the shaft quickly
Dynamic pressure liquid film is formed, enables the shaft compared with floating rapid under the slow-speed of revolution.It is promoted in the revolving speed of the shaft to normal and is turned
When fast, the axis stream pressurized construction can transmit more between the Hydrodynamic transverse bearing and the working surface of the shaft
More liquid, so that the pressure of dynamic pressure liquid film is increased, so that the bearing capacity of the Hydrodynamic transverse bearing improves；Secondly
The fluid flow between the Hydrodynamic transverse bearing and the working surface of the shaft is also increased, what these flows increased
Liquid can take away the heat of dynamic pressure liquid film generation in time, reduce the temperature of dynamic pressure liquid film, which thereby enhance dynamic pressure liquid film pair
The saturation pressure answered keeps dynamic pressure liquid film that cavitation will not occur when the shaft has relatively high revolving speed, reduces due to liquid
A possibility that shaft train instability caused by film cavitation.To improve the stability and reliability of system operation.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the hydrodynamic bearing provided in an embodiment of the present invention for being equipped with shaft；
Fig. 2 is the main view of hydrodynamic bearing shown in Fig. 1.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Embodiment 1
Referring to Figures 1 and 2, Hydrodynamic transverse bearing provided in an embodiment of the present invention includes axle sleeve 1, and is located at axle sleeve
Bearing body 2 in 1, axle sleeve 1 and bearing body 2 are mutually independent and form pre- gap between, and the liquid is dynamic
Dynamic pressure liquid film is formed between the inner surface of axle sleeve 1 and the outer surface of bearing body 2 when pressing transverse bearing work.For the ease of saying
It is bright, shaft 6 is additionally provided in bearing body 2, the inside of bearing body 2 is equipped with keyway 5, the key being arranged on the keyway 5 and shaft 6
Form cooperation.
Under orientation shown in Fig. 1, bearing body 2 is including former and later two end faces and between former and later two end faces
Side.On the side of bearing body 2 close to former and later two end faces position at formed two symmetrical taper table tops, along from
The middle section of 2 side of bearing body is directed toward the direction of former and later two end faces, and the cross-sectional area of two taper table tops gradually subtracts
It is small.
Row's axis stream pressurized construction 4, the outboard end of each row's axis stream pressurized construction 4 are respectively provided on two taper table tops
The end face of the bearing body 2 of corresponding side is concordant.Two rows of axis stream pressurized constructions 4 are axially and symmetrically.In 2 side of bearing body
Centre region two sides, which are equipped with, is respectively provided with row's tipper 3, and two rows of tippers 3 are axially and symmetrically.Tipper 3 can use rectangular section
At least one of slot, triangular section channel, trapezoid cross section slot, stepped groove, horizontal semicolumn slot or tapered half-cone slot.Inclination
Slot 3 can also be achieved as multiple layer metal paillon, and multiple layer metal paillon uses arbitrary form metal foil, and such as wave pattern is bubbled shape
One of formula, cantilevered fashion or form of springs.Wherein, multiple layer metal paillon can also be multiple layer metal compliant foil.
In Hydrodynamic transverse bearing shown in Fig. 1, axis stream pressurized construction 4 is embodied as blade, and however, it is not limited to this,
Axis stream pressurized construction 4 can also be achieved as screw thread or other similar structure.When the hydrodynamic bearing is rigid bearing, incline
Skewed slot 3 is formed on the lateral surface of bearing body 2 by etching or mach mode.When the hydrodynamic bearing is soft
Property bearing when, multilayer elastic metal foil by weld or bonding etc. assembly methods be formed on the lateral surface of bearing body 2.
When axis stream pressurized construction 4 is embodied as blade, arranged direction and tipper of the blade in 2 circumferential direction of bearing body
3 arranged direction in 2 circumferential direction of bearing body is identical.In general, the cloth of blade and tipper 3 in 2 circumferential direction of bearing body
Direction is set, relative to the axially inclined of bearing body 2.Meridian plane runner sectional area between two neighboring blade is preferably tapered
Form, to guarantee to increase from the external fluid pressure flowed into inside the hydrodynamic bearing.When the revolving speed of shaft 6 is lower,
Axis stream pressurized construction 4 can generate pumping effect, to quickly be formed between axle sleeve 1 and the working surface of bearing body 2 dynamic
Hydraulic fluid film makes bearing body 2 and shaft 6 together can be compared with floating rapid under the slow-speed of revolution.
When the revolving speed of shaft 6 is promoted to rated speed, axis stream pressurized construction 4 can be to the work of axle sleeve 1 and bearing body 2
Make to be pumped into more liquid between surface, liquid enters in tipper 3, so that the pressure of dynamic pressure liquid film is increased, so that described
The bearing capacity of hydrodynamic bearing improves；Next also increases the liquid flow between axle sleeve 1 and the working surface of bearing body 2
Amount, the liquid that these flows increase can take away the heat of dynamic pressure liquid film generation in time, reduce the temperature of dynamic pressure liquid film, thus
The corresponding saturation pressure of dynamic pressure liquid film is improved, keeps dynamic pressure liquid film not occur when the shaft has relatively high revolving speed
A possibility that cavitation, reduction shaft train instability as caused by liquid film cavitation.To improve the stability of system operation and reliable
Property.
It for Hydrodynamic transverse bearing, is generally lubricated, is avoided additional using lubrication using systematic working medium
Agent and system is polluted.
Embodiment 2
Some embodiments of the invention additionally provide a kind of centrifugal pump, have Hydrodynamic radial axle described in above-described embodiment
It holds.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention
Within the scope of shield.
Claims (12)
1. a kind of Hydrodynamic transverse bearing, which is characterized in that the bearing body including axle sleeve and with axle sleeve cooperation, it is described
Bearing body includes two opposing end surfaces and the side between two opposing end surface, and the side of the bearing body is equipped with
Axis stream pressurized construction, at least one end face and the separate side of the axis stream pressurized construction in two opposing end surface
The middle section in face.
2. Hydrodynamic transverse bearing according to claim 1, which is characterized in that the axle sleeve and the bearing body that
This is mutually indepedent, and the axis stream pressurized construction is arranged on the lateral surface of the bearing body；Alternatively,
The axle sleeve and the bearing body are structure as a whole, and the inside of the bearing body is arranged in the axis stream pressurized construction
On face.
3. Hydrodynamic transverse bearing according to claim 1, which is characterized in that the axis stream pressurized construction includes along institute
Two rows of axis stream pressurized constructions of the side circumferential array of bearing body are stated, row's axis stream pressurized construction is close to two opposing end surface
In an end face setting, another row's axis stream pressurized construction in two opposing end surface another end face setting, and
The two rows axis stream pressurized construction is axially symmetric.
4. Hydrodynamic transverse bearing according to claim 1, which is characterized in that the axis stream pressurized construction includes along institute
State the blade of the side circumferential array of bearing body；Alternatively, the axis stream pressurized construction includes along the side of the bearing body
The screw thread of circumferential array.
5. Hydrodynamic transverse bearing according to claim 4, which is characterized in that the close institute of the bearing body side
The part for stating two opposing end surfaces is set as taper table top, and the blade or screw thread of the circumferential array are set to the taper table top
On.
6. Hydrodynamic transverse bearing according to claim 1, which is characterized in that the axis stream pressurized construction and respective side
The end face it is concordant；Alternatively, the axis stream pressurized construction is shorter than the end face of respective side.
7. Hydrodynamic transverse bearing according to claim 1, which is characterized in that also set on the side of the bearing body
There are tipper or multiple layer metal paillon, the tipper or multiple layer metal paillon setting are close in the axis stream pressurized construction
The inside in the flanking central region.
8. Hydrodynamic transverse bearing according to claim 7, which is characterized in that the tipper includes along the bearing
Two rows of tippers of the side circumferential array of ontology, the two rows tipper are axially symmetric.
9. Hydrodynamic transverse bearing according to claim 8, which is characterized in that the tipper uses rectangular section
At least one of slot, triangular section channel, trapezoid cross section slot, stepped groove, horizontal semicolumn slot or tapered half-cone slot.
10. Hydrodynamic transverse bearing according to claim 7, which is characterized in that the multiple layer metal paillon includes edge
Two rows of multilayer elastic metal foils of the side axial arrangement of the bearing body, the two rows multilayer elastic metal foil are axial
Symmetrically.
11. Hydrodynamic transverse bearing according to claim 10, which is characterized in that the multiple layer metal paillon is wave
Form, the multiple layer metal paillon for being bubbled form, cantilevered fashion or form of springs.
12. a kind of centrifugal pump, which is characterized in that including according to claim 1-11 described in any item Hydrodynamic radial axles
It holds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910095029.5A CN109944871B (en) | 2019-01-30 | 2019-01-30 | Hydraulic dynamic pressure radial bearing and centrifugal pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910095029.5A CN109944871B (en) | 2019-01-30 | 2019-01-30 | Hydraulic dynamic pressure radial bearing and centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN109944871A true CN109944871A (en) | 2019-06-28 |
| CN109944871B CN109944871B (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910095029.5A Active CN109944871B (en) | 2019-01-30 | 2019-01-30 | Hydraulic dynamic pressure radial bearing and centrifugal pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821950A (en) * | 2019-09-23 | 2020-02-21 | 西安交通大学 | Liquid dynamic pressure lubrication herringbone groove bearing with variable groove depth structure |
| CN111042912A (en) * | 2019-12-18 | 2020-04-21 | 马双斌 | High-performance long-acting supercharger |
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| JPH04209995A (en) * | 1990-11-30 | 1992-07-31 | Daikin Ind Ltd | Construction of low vacuum pump bearing |
| US5871285A (en) * | 1996-02-08 | 1999-02-16 | Aesop, Inc. | Hybrid combined hydrostatic and hydrodynamic bearing with enhanced stability and reduced flow rate |
| WO2000052350A1 (en) * | 1998-03-17 | 2000-09-08 | Patent Translation And Consulting Co., Inc. | Self-acting fluid dynamic bearing support and method of assembling thereof |
| CN104421199A (en) * | 2013-08-27 | 2015-03-18 | 霍尼韦尔国际公司 | Functionally asymmetric two-sided turbocharger wheel and diffuser |
| CN105927559A (en) * | 2015-04-22 | 2016-09-07 | 张澄宇 | Micro-miniature split turbojet driven compressor |
| CN106687694A (en) * | 2015-09-04 | 2017-05-17 | 托博云株式会社 | Direct drive double turbo blower cooling structure |
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|---|---|---|---|---|
| US3957317A (en) * | 1975-05-21 | 1976-05-18 | The Garrett Corporation | Shaped foil bearing |
| JPH04209995A (en) * | 1990-11-30 | 1992-07-31 | Daikin Ind Ltd | Construction of low vacuum pump bearing |
| US5871285A (en) * | 1996-02-08 | 1999-02-16 | Aesop, Inc. | Hybrid combined hydrostatic and hydrodynamic bearing with enhanced stability and reduced flow rate |
| WO2000052350A1 (en) * | 1998-03-17 | 2000-09-08 | Patent Translation And Consulting Co., Inc. | Self-acting fluid dynamic bearing support and method of assembling thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821950A (en) * | 2019-09-23 | 2020-02-21 | 西安交通大学 | Liquid dynamic pressure lubrication herringbone groove bearing with variable groove depth structure |
| CN110821950B (en) * | 2019-09-23 | 2021-08-13 | 西安交通大学 | Liquid dynamic pressure lubrication herringbone groove bearing with variable groove depth structure |
| CN111042912A (en) * | 2019-12-18 | 2020-04-21 | 马双斌 | High-performance long-acting supercharger |
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| Publication number | Publication date |
|---|---|
| CN109944871B (en) | 2020-06-23 |
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