CN105443429A - Compact non-backing plate double oil-film damp bearing and manufacturing method thereof - Google Patents
Compact non-backing plate double oil-film damp bearing and manufacturing method thereof Download PDFInfo
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- CN105443429A CN105443429A CN201410385122.7A CN201410385122A CN105443429A CN 105443429 A CN105443429 A CN 105443429A CN 201410385122 A CN201410385122 A CN 201410385122A CN 105443429 A CN105443429 A CN 105443429A
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- damping
- oil
- film
- bearing
- tilting pad
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Abstract
The invention relates to a high-speed sliding bearing used for a centrifugal compressor, in particular to a compact non-backing plate double oil-film damp bearing and a manufacturing method thereof. The compact non-backing plate double oil-film damp bearing comprises a damping bearing body, left and right oil-baffling ring, titling pads, and a damping cavity on the damping bearing body. The double oil-film damp bearing is of a compact non-backing plate structure. Damping cavities are directly machined on the damping bearing body. By supplying oil to the damping cavities, damping oil films are formed. The double oil-film damp bearing is formed by the damping oil films and a bearing oil film. The double oil-film damp bearing has great functions of improving system damping, eliminating multiple factors of destabilizing a system. By adoption of the compact non-backing plate double oil-film damp bearing, imbalance quantity incentives, especially amplitude when a rotor rotates above critical speed of rotation and gas vibration occurs, can be inhibited.
Description
Technical field
The present invention relates to centrifugal compressor high-speed slide bearing, specifically a kind of compact type is without the two oil-film damping bearing of backing plate and processing method thereof, is applicable to the design bearing of all kinds of centrifugal compressor product.
Background technique
In centrifugal compressor operation process, time rotor is by first critical speed, the situation that the vibration amplitude that axle can occur significantly increases, this phenomenon is the hidden danger of unit safety smooth operation; So when unit is by critical speed of rotation, must be quickly through.On the compressor, due to reasons such as gas excitings, can make compressor in operation process, the situation that vibration amplitude is much higher than normal value occurs suddenly.If can take measures, damping characteristic when making rotor when first critical speed or gas exciting occurs changes, cause the remarkable decline of vibration amplitude, under less vibration amplitude, critical speed of rotation is passed through for guarantee unit, reduce the impact of gas exciting, thus ensure that the Security of unit operation has great importance.
Within the compressor, conventional is traditional Tilting Pad bearing, as shown in Figure 1A, Figure 1B, Fig. 2 A, Fig. 2 B, traditional Tilting Pad bearing comprise bearing support 1, tile fragment, left and right oil blocking ring 2, conjunction screw and pin 5, tile fragment is multiple, be divided into tilting pad 3 and tilting pad with holes 4, each tile fragment is uniform at circumferencial direction along the bore area of bearing support 1, and spacing by left and right oil blocking ring 2; The diameter of bore of bearing support 1 is d.The tile fragment of this bearing bears radial load in the unit, and tile fragment can swing around respective fulcrum, and the fulcrum of each tile fragment directly contacts with the bore area of bearing support 1; During compressor operation, automatically form a wedge gap between tile fragment and axle journal, in wedge gap, form oil film, Tilting Pad bearing relies on this oil film bearing load just, so in traditional Tilting Pad bearing, only have one deck oil film, the fulcrum of tile fragment can not swing itself.This traditional Tilting Pad bearing, rotor, when first critical speed or when there is gas exciting, cannot reduce vibration amplitude, and unit running still exists potential safety hazard.
Summary of the invention
In order to reduce compressor drum by vibration amplitude during first critical speed, or in order to reduce the significantly increase of the vibration amplitude that compressor causes due to gas exciting, the object of the present invention is to provide a kind of compact type without the two oil-film damping bearing of backing plate and processing method thereof.This pair of oil-film damping bearing to fulcrum with elasticity, make tile fragment also radially can produce displacement, this makes it possible on the bearing support at tile fragment fulcrum back, form elasticity squeezed air-damping chamber, thus improve damping characteristic, and then improve the kinetic stability of rotor-bearing arrangement and subtract trochantinian amplitude.
The object of the invention is to be achieved through the following technical solutions:
Compact type of the present invention comprises damping bearing body, tilting pad and left and right oil blocking ring without the two oil-film damping bearing of backing plate, wherein tilting pad is multiple, uniform along damping bearing body bore area circumference, the both sides of described tilting pad are provided with the left and right oil blocking ring spacing to tilting pad, this tilting pad and through described pair of oil-film damping bearing axle journal form the oil film of bearing load; Described damping bearing body along the circumferential direction has multiple damping cavity and multiple oil inlet hole, each damping cavity is all communicated with an oil inlet hole, lubricant oil is entered into each damping cavity by each described oil inlet hole, is formed damping oil film, and the oil film of this damping oil film and described bearing load forms two oil film.
Wherein: described damping cavity is arc-shaped cavity, and this damping cavity is identical with the quantity of oil inlet hole and tilting pad; Described pair of oil-film damping bearing is horizonally split structure, and the curvature of described damping cavity is identical with the curvature of damping bearing body endoporus, and each oil inlet hole is along the circumference radially direct of described damping bearing body; Two in described tilting pad for having the tilting pad with holes in hole, this tilting pad with holes and tilting pad have five; Two described tilting pads with holes are positioned at substantially horizontal, and damping cavity shape on the damping bearing body at back is identical, and the damping cavity shape on the damping bearing body at other three described tilting pad backs is identical; Damping cavity arc length on the described damping bearing body being positioned at the tilting pad back with holes of substantially horizontal is less than the arc length of the damping cavity on the damping bearing body at other three tilting pad backs; Described in two between substantially horizontal tilting pad with holes and the tilting pad be in below horizonally split face bears Main Load; The described fulcrum being positioned at the tilting pad with holes of substantially horizontal lays respectively at the below in horizonally split face, two in other three tilting pads tops being positioned at horizonally split face, another is positioned at the below in horizonally split face, and is positioned at the centre of two described tilting pads with holes.
Compact type of the present invention without the processing method of the two oil-film damping bearing of backing plate is:
Each damping cavity is along the circumferential direction processed at the endoporus place near damping bearing body, on damping bearing body, circumferentially radial direction processes multiple oil inlet hole, and the degree of depth of oil inlet hole arrives damping cavity, do not allow to drill, lubricant oil enters into damping cavity by the oil inlet hole on damping bearing body, produce damping oil film, damping oil film makes each tilting pad fulcrum place have elasticity, makes tilting pad produce radial displacement; The oil film of the bearing load that damping oil film and tilting pad and axle journal are formed together form two oil film structure;
Each damping cavity is through in the axial direction, it is external that damping bearing axially discharged by lubricant oil in each damping cavity, pressure lubrication oil constantly enters into each damping cavity from radial direction, afterwards by axially discharging, keep the lubricant oil in each damping cavity to have the pressure of setting, realize damping.
Advantage of the present invention and good effect are:
1. the present invention is by transforming traditional tilting-pad bearing, define two oil film structure, reduce the more good amplitude that rotor causes when first critical speed or generation gas exciting, than traditional Tilting Pad bearing, there is better damping characteristic and better dynamic property, than conventional radial tilting-pad bearing more remarkable effect in anti-gas exciting and reduction first critical speed vibration amplitude.
2. the present invention is compared with traditional Tilting Pad bearing, only on bearing support, machined damping cavity and oil inlet hole, adds two procedures, does not increase any one parts, engineering practice implements easy and convenient; The position of damping cavity, near damping bearing body endoporus, makes the structure of two oil-film damping bearing compacter.
3. the present invention is according to the diverse location of tilting pad, and increase damping cavity in corresponding part, the arc length of damping cavity will adapt to the subdivision structure of bearing support, designs separately, and damping cavity quality of processing is the key determining two oil-film damping bearing success or failure.
4. in the present invention, the simplicity of design of damping cavity is unique, and good manufacturability is easy to process.
5. the present invention can be applied on the Tilting Pad bearing of different-diameter, and increase damping characteristic, generalization is good.
6. the present invention studies on the basis of great many of experiments, by facts have proved that compact type is without the validity of the two oil-film damping bearing design of backing plate and feasibility.
7. compact type of the present invention is without the processing method of the two oil-film damping bearing of backing plate, increase damping oil film on damping bearing body, to fulcrum with the elasticity of setting, tilting pad is made radially to produce displacement, damping oil film on the damping bearing body at tilting pad fulcrum back, the damping characteristic of bearing can be improved, and then improve the kinetic stability of rotor-bearing arrangement and subtract trochantinian vibration amplitude.
Accompanying drawing explanation
Figure 1A is the internal structure sectional view of conventional radial tilting-pad bearing;
Figure 1B is the side view cutaway drawing of Figure 1A;
Fig. 2 A is the internal structure sectional view of conventional radial tilting-pad bearing bearing support;
Fig. 2 B is the side view cutaway drawing of Fig. 2 A;
Fig. 3 A is the internal structure sectional view of compact type of the present invention without the two oil-film damping bearing of backing plate;
Fig. 3 B is the side view cutaway drawing of Fig. 3 A;
Fig. 4 A is the internal structure sectional view of compact type of the present invention without the two oil-film damping bearing bearing support of backing plate;
Fig. 4 B is the side view cutaway drawing of Fig. 4 A;
Wherein: 1 is bearing support, 2 is left and right oil blocking ring, and 3 is tilting pad, and 4 is tilting pad with holes, and 5 is that 6 is oil inlet hole, and 7 is damping cavity, and 8 is damping bearing body, and 9 is hole closing screw and pin.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Compact type of the present invention is without in the two oil-film damping bearing of backing plate, and have two-layer oil film when rotor operates, one deck is the oil film of bearing load, and one deck is the damping oil film improving damping characteristic, forms two oil film characteristics of bearing.As shown in Fig. 3 A, Fig. 3 B, two oil-film damping bearing comprises damping bearing body 8, left and right oil blocking ring 2, tilting pad 3, tilting pad with holes 4 and damping cavity 7, wherein tilting pad 3 has three, tilting pad 4 with holes has two, these five tile fragments are circumferentially uniform at the bore area of damping bearing body 8, the tilting pad with holes 4 being wherein positioned at damping bearing working area processes porose 9, in hole 9, the temperature of tile fragment can be detected by laying temperature sensor.The both sides of tilting pad 3 and tilting pad with holes 4 have been provided with the left and right oil blocking ring 2 of position-limiting action, tilting pad 3 and tilting pad with holes 4 and through two oil-film damping bearing axle journal form the oil film of bearing load.
Damping bearing body 8 circumferentially evenly offers the oil inlet hole 6 corresponding with tilting pad 3 and tilting pad with holes 4 position, each oil inlet hole 6 is along the circumference radially direct of damping bearing body 8, each damping cavity 7 is connected with an oil inlet hole 6, lubricant oil is entered into damping cavity 7 by oil inlet hole 6, is formed damping oil film, and the oil film of this damping oil film and bearing load forms two oil film.The quantity of the quantity sum of tilting pad 3 and tilting pad 4 with holes and the quantity of damping cavity 7, oil inlet hole 6 is identical.
Of the present invention is horizonally split structure without the two oil-film damping bearing of backing plate, five tile fragments (three tilting pads, 3, two tilting pads 4 with holes) are uniform at circumferencial direction, two tilting pads 4 with holes are positioned at substantially horizontal, and these two fulcrums being positioned at the tilting pad with holes 4 of substantially horizontal are in the below in horizonally split face respectively; Have two tops being positioned at horizonally split face in other three tilting pads 3, the below having to be positioned at horizonally split face is also positioned at the centre of the tilting pad with holes 4 of substantially horizontal at two.
The arc length of two damping cavity 7 be positioned on the damping bearing body 8 at tilting pad with holes 4 back of substantially horizontal is less than the arc length of the damping cavity 7 at other three tilting pad 3 backs, between two substantially horizontal tilting pads 4 with holes and the tilting pad 3 be in below horizonally split face bears Main Load.When design two is positioned at the point element of the tilting pad with holes 4 of substantially horizontal, must consider that whole pair of oil-film damping bearing is subdivision structure, so, the structure of these two point elements and other three different, the arc length of damping cavity 7 also from other three different, but, because the lower tile fragment (namely at two tilting pads 3 between substantially horizontal tilting pad with holes 4) of two oil-film damping bearing is the main tile fragment bearing Main Load, therefore, although the arc length of the damping cavity 7 of substantially horizontal is shorter, but, do not affect the bearing capacity of whole pair of oil-film damping bearing.
Compact type of the present invention without the processing method of the two oil-film damping bearing of backing structure is:
Damping cavity 7 is being processed on the position that the endoporus place of damping bearing body 8 is corresponding with each tile fragment, electrical spark is adopted to bore an axial hole in the initial position of each damping cavity 7, then the line of Linear cut is carried out Linear cut through this through hole, process multiple closed damping cavity 7; On damping bearing body 8, circumferentially radial direction processes multiple oil inlet hole 6, lubricant oil enters into damping cavity 7 by the oil inlet hole 6 on damping bearing body 8, produce damping oil film, damping oil film gives the elasticity of each tilting pad 3 fulcrum and the setting of each tilting pad with holes 4 fulcrum, make tilting pad 3 and tilting pad with holes 4 produce radial displacement, the oil film of the bearing load that damping oil film and tilting pad 3, tilting pad with holes 4 and axle journal are formed together form two oil film structure.Be specially: compact type of the present invention is identical with traditional tilting-pad bearing body hole size d without two oil-film damping bearing support 8 hole size of backing plate, lubricant oil enters into damping cavity 7 by the oil inlet hole 6 on damping bearing body 8, create damping oil film, under the swing of tilting pad 3 and tilting pad with holes 4, oil film is squeezed, produce extrusion effect and define squeeze film damper, realizing the function increasing damping characteristic.
Each damping cavity 7 is through in the axial direction, lubricant oil in each damping cavity 7 is axially discharged outside damping bearing body 8, lubricant oil constantly enters into each damping cavity 7 from radial direction, afterwards by axially discharging, keep the lubricant oil in each damping cavity 7 to have the pressure of setting, realize damping.
After application compact type of the present invention is without the two oil-film damping bearing of backing structure, rotor is in by first critical speed, the vibration amplitude of free end and drive end have dropped about 15%, damping ratio improves about 20%, reaches and reduces the object of rotor by vibration amplitude when first critical speed and gas exciting.And, relative to traditional Tilting Pad bearing, only increase by 2 procedures, be easy to realize, but in raising damping characteristic, Be very effective, therefore compact type without the two oil-film damping bearing of backing plate significant and application prospect widely.
Claims (8)
1. a compact type is without the two oil-film damping bearing of backing plate, it is characterized in that: comprise damping bearing body (8), tilting pad (3) and left and right oil blocking ring (2), wherein tilting pad (3) is for multiple, uniform along damping bearing body (8) bore area circumference, the both sides of described tilting pad (3) are provided with the left and right oil blocking ring (2) spacing to tilting pad (3), this tilting pad (3) and through described pair of oil-film damping bearing axle journal form the oil film of bearing load; Described damping bearing body (8) along the circumferential direction has multiple damping cavity (7) and multiple oil inlet hole (6), each damping cavity (7) is all communicated with an oil inlet hole (6), lubricant oil is entered into each damping cavity (7) by each described oil inlet hole (6), is formed damping oil film, and the oil film of this damping oil film and described bearing load forms two oil film.
2. press compact type according to claim 1 without the two oil-film damping bearing of backing plate, it is characterized in that: described damping cavity (7) is arc-shaped cavity, this damping cavity (7) is identical with the quantity of oil inlet hole (6) and tilting pad (3).
3. press compact type according to claim 2 without the two oil-film damping bearing of backing plate, it is characterized in that: described pair of oil-film damping bearing is horizonally split structure, the curvature of described damping cavity (7) is identical with the curvature of damping bearing body (8) endoporus, and each oil inlet hole (6) is along the circumference radially direct of described damping bearing body (8).
4. press compact type according to claim 3 without the two oil-film damping bearing of backing plate, it is characterized in that: two in described tilting pad (3) for having the tilting pad with holes (4) in hole (9), this tilting pad with holes (4) and tilting pad (3) have five; Two described tilting pads with holes (4) are positioned at substantially horizontal, and damping cavity (7) shape on the damping bearing body (8) at back is identical, damping cavity (7) shape on the damping bearing body (8) at other three described tilting pad (3) backs is identical.
5. by compact type according to claim 4 without the two oil-film damping bearing of backing plate, it is characterized in that: described in damping cavity (7) arc length be positioned on the damping bearing body (8) at tilting pad with holes (4) back of substantially horizontal be less than the arc length of the damping cavity (7) on the damping bearing body (8) at other three tilting pad (3) backs; To be positioned at described in two between substantially horizontal tilting pad with holes (4) and the tilting pad (3) be in below horizonally split face bears Main Load.
6. press compact type according to claim 4 without the two oil-film damping bearing of backing plate, it is characterized in that: described in be positioned at the tilting pad with holes (4) of substantially horizontal fulcrum lay respectively at the below in horizonally split face, two in other three tilting pads (3) tops being positioned at horizonally split face, another is positioned at the below in horizonally split face, and is positioned at the centre of two described tilting pads with holes (4).
7. by the processing method of the compact type described in the arbitrary claim of claim 1 to 6 without the two oil-film damping bearing of backing plate, it is characterized in that: along the circumferential direction process each damping cavity (7) at the endoporus place near damping bearing body (8), on damping bearing body (8), circumferentially radial direction processes multiple oil inlet hole (6), and the degree of depth of oil inlet hole (6) arrives damping cavity (7), do not allow to drill, lubricant oil enters into damping cavity (7) by the oil inlet hole (6) on damping bearing body (8), produce damping oil film, damping oil film makes each tilting pad (3) fulcrum place have elasticity, tilting pad (3) is made to produce radial displacement, the oil film of the bearing load that damping oil film and tilting pad (3) and axle journal are formed together form two oil film structure.
8. by processing method according to claim 7, it is characterized in that: each damping cavity (7) is through in the axial direction, lubricant oil in each damping cavity (7) axially discharges damping bearing body (1) outward, pressure lubrication oil constantly enters into each damping cavity (7) from radial direction, afterwards by axially discharging, keep the lubricant oil in each damping cavity (7) to have the pressure of setting, realize damping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385122.7A CN105443429A (en) | 2014-08-06 | 2014-08-06 | Compact non-backing plate double oil-film damp bearing and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385122.7A CN105443429A (en) | 2014-08-06 | 2014-08-06 | Compact non-backing plate double oil-film damp bearing and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105443429A true CN105443429A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410385122.7A Pending CN105443429A (en) | 2014-08-06 | 2014-08-06 | Compact non-backing plate double oil-film damp bearing and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339318A (en) * | 2017-06-30 | 2017-11-10 | 哈尔滨工程大学 | A kind of controllable dry-friction damping bearing of damping force |
| CN110462229A (en) * | 2017-03-24 | 2019-11-15 | 三菱重工业株式会社 | Bearing shell, tilting pad bearing and the rotating machinery of tilting pad bearing |
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| US5738445A (en) * | 1997-02-21 | 1998-04-14 | Delaware Capital Formation, Inc. | Journal bearing having vibration damping elements |
| CN1995772A (en) * | 2006-12-21 | 2007-07-11 | 上海交通大学 | Large-sized sleeve bearing thrust-face reverse-lubricating and lubricating oil cooling method |
| CN202395585U (en) * | 2012-01-17 | 2012-08-22 | 珠海格力电器股份有限公司 | Motor rear bearing and centrifugal compressor and refrigeration device comprising same |
| CN103206455A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Motor front bearing, and centrifugal compressor and refrigeration device comprising motor front bearing |
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2014
- 2014-08-06 CN CN201410385122.7A patent/CN105443429A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126119A (en) * | 1979-03-19 | 1980-09-29 | Toshiba Corp | Bearing device |
| JPH08312641A (en) * | 1995-05-15 | 1996-11-26 | Mitsubishi Heavy Ind Ltd | Dynamic pressure gas bearing |
| US5738445A (en) * | 1997-02-21 | 1998-04-14 | Delaware Capital Formation, Inc. | Journal bearing having vibration damping elements |
| CN1995772A (en) * | 2006-12-21 | 2007-07-11 | 上海交通大学 | Large-sized sleeve bearing thrust-face reverse-lubricating and lubricating oil cooling method |
| CN202395585U (en) * | 2012-01-17 | 2012-08-22 | 珠海格力电器股份有限公司 | Motor rear bearing and centrifugal compressor and refrigeration device comprising same |
| CN103206455A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Motor front bearing, and centrifugal compressor and refrigeration device comprising motor front bearing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110462229A (en) * | 2017-03-24 | 2019-11-15 | 三菱重工业株式会社 | Bearing shell, tilting pad bearing and the rotating machinery of tilting pad bearing |
| CN110462229B (en) * | 2017-03-24 | 2021-03-02 | 三菱重工业株式会社 | Bearing bush for tilting pad bearing, and rotary machine |
| CN107339318A (en) * | 2017-06-30 | 2017-11-10 | 哈尔滨工程大学 | A kind of controllable dry-friction damping bearing of damping force |
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