CN208919085U - A kind of vacuum adsorption porous gas static pressure thrust bearing - Google Patents
A kind of vacuum adsorption porous gas static pressure thrust bearing Download PDFInfo
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- CN208919085U CN208919085U CN201821289751.XU CN201821289751U CN208919085U CN 208919085 U CN208919085 U CN 208919085U CN 201821289751 U CN201821289751 U CN 201821289751U CN 208919085 U CN208919085 U CN 208919085U
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Abstract
The utility model discloses a kind of vacuum adsorption porous gas static pressure thrust bearings, including bearing matrix, aerostatic bearing flow controller and thrust plate, bearing matrix is made of aluminum alloy materials, round negative pressure cavity is equipped at the lower end surface center of bearing matrix, its top is equipped with the central blind hole coaxial with round negative pressure cavity, endless groove is equipped on the lower end surface of bearing matrix, around round negative pressure cavity, the section of endless groove is rectangle, and the groove top face of endless groove is equipped with two annular balancing slits；Porous material ring as aerostatic bearing flow controller is installed, porous material ring is made of isotropic porous material, and end face protrudes from the lower end surface of bearing matrix in endless groove；The side of bearing matrix is equipped with air vent and venthole, and air vent is communicated with two annular balancing slits, and venthole is communicated with central blind hole.The utility model can be by improving Sa/ S value effectively improves bearing rigidity, to solve the problems, such as aerostatic bearing insufficient rigidity under a low load.
Description
Technical field
The utility model relates to high rigidity and high stables under a kind of gas static pressure thrust bearing more particularly to a kind of low carrying
The porous gas static pressure thrust bearing of property.
Background technique
Aerostatic bearing is high because having kinematic accuracy, and frictional dissipation, fever deformation are small, be widely used in Precision Machining and
In measurement equipment.The difference of bearing flow controller directly affects its bearing capacity and rigidity, the throttling side that aerostatic bearing uses
Formula is mainly orifice restriction, slit throttling, surface throttle and porous restriction etc..Since porous restriction device gas supply area is big,
Pressure field distribution is uniform, and porous gas static pressure bearing has bearing capacity and rigidity big compared with other traditional gas hydrostatic bearings,
Stability is good, advantages of simple structure and simple.With the variation of air-film thickness, the rigidity of bearing when porous gas static pressure bearing working
Also it can change, when bearing load is lower, air-film thickness is larger, and bearing rigidity at this time is relatively low.Therefore low in bearing
Under load, the rigidity of common porous matter aerostatic bearing is not able to satisfy design requirement still.
Utility model content
In order to overcome prior art problem, the purpose of the utility model is to provide a kind of vacuum adsorption type porous gas is quiet
Thrust bearing is pressed, to solve the problems, such as aerostatic bearing insufficient rigidity under a low load.
The utility model adopts the technical scheme that in order to solve the above technical problems: a kind of vacuum adsorption porous gas
Static pressure thrust bearing, including bearing matrix, aerostatic bearing flow controller and thrust plate, the bearing matrix is by aluminum alloy materials
Be made, be equipped with round negative pressure cavity at the lower end surface center of the bearing matrix, the top of the circle negative pressure cavity be equipped with it is described
Round negative pressure cavity coaxial central blind hole is equipped with ring-type on the lower end surface of the bearing matrix, around the round negative pressure cavity
Slot, the section of the endless groove are rectangle, and the groove top face of the endless groove is equipped with two annular balancing slits；Peace in the endless groove
Equipped with the porous material ring as aerostatic bearing flow controller, the porous material ring uses isotropic porous material system
At material can be porous graphite, Oilite bronze, porous stainless steel etc., and the end face of the porous material ring protrudes from the bearing
The lower end surface of matrix；The side of the bearing matrix is equipped with air vent and venthole, the air vent and two annular balancing slits
It communicates, the venthole is communicated with the central blind hole, and the air vent and venthole are crossed as 90 degree in space.
Further, in the utility model, the endless groove of the porous material ring and bearing matrix lower end surface cooperates,
And it is bonded with epoxy glue.
The end face of the porous material ring is bearing working face, and the thrust plate is oppositely arranged with the bearing working face.
The circular cross-section product of the circle negative pressure cavity is Sa, the circular cross-section of the circle negative pressure cavity is accumulated and the endless groove
The sum of annular cross-sectional area be S, 0.2 < Sa/ S < 0.35.
Compared with prior art, the utility model has the beneficial effects that
(1) in case of a low load, the rigidity of bearing, and the area tune by changing negative pressure cavity be can effectively improve
The bearing capacity and rigidity that bearing is held.
(2) flow controller of the isotropism porous material as aerostatic bearing is used, ensure that voidage is uniform, permeates
Rate is consistent and isotropism, sky throttle air static pressure spring bearing small compared with absorption type compare, due to not having pneumatic presence, be not easy
There is " pneumatic hammer " phenomenon, improves the stability of aerostatic bearing asked.
Detailed description of the invention
Fig. 1 is the vacuum adsorption porous gas static pressure thrust bearing main sectional view of the utility model；
Fig. 2 is the vacuum adsorption porous gas static pressure thrust bearing bearing matrix cross-sectional view of the utility model；
Fig. 3 is the vacuum adsorption porous gas static pressure thrust bearing working principle diagram of the utility model；
Fig. 4 is the vacuum adsorption porous gas static pressure thrust bearing rigidity pair under different loads of the utility model
Than.
Specific embodiment
Technical solutions of the utility model are described in further detail in the following with reference to the drawings and specific embodiments, it is described
Specific embodiment is only explained the utility model, is not intended to limit the utility model.
As shown in Figure 1, the utility model proposes a kind of vacuum adsorption porous gas static pressure thrust bearing, including axis
Hold matrix 2, aerostatic bearing flow controller and thrust plate 1.
As shown in Fig. 2, the bearing matrix 2 is made of aluminum alloy materials, set at the lower end surface center of the bearing matrix 2
There is round negative pressure cavity 5, the top of the circle negative pressure cavity 5 is equipped with the central blind hole coaxial with the round negative pressure cavity 5, the axis
It holds on the lower end surface of matrix 2, be equipped with endless groove around the round negative pressure cavity 5, the section of the endless groove 6 is rectangle, institute
The groove top face for stating endless groove 6 is equipped with two annular balancing slits 7.
As shown in Figure 1, the porous material ring 3 as aerostatic bearing flow controller is installed in the endless groove 6, it is described
Porous material ring 3 is made of isotropic porous material, the porous material ring 3 and 2 lower end surface of bearing matrix
Endless groove 6 cooperate, and be bonded with epoxy glue.The end face of the porous material ring 3 protrudes from the lower end of the bearing matrix 2
Face；The end face of the porous material ring 3 is that bearing working face 4 (carries out ultra-precise cutting to the bearing working face 4, set with meeting
Count requirement), the thrust plate 1 is oppositely arranged with the bearing working face 4.The side of the bearing matrix 2 is equipped with air vent 8
With venthole 9, the air vent 8 is communicated with two annular balancing slits 7, and the venthole 9 is communicated with the central blind hole, described
Air vent 8 and venthole 9 are crossed as 90 degree in space.
In the utility model, the circular cross-section product for the round negative pressure cavity 5 being arranged on 2 lower end surface of bearing matrix is Sa,
The long-pending ring section with the endless groove 6 being arranged on 2 lower end surface of bearing matrix of circular cross-section of the circle negative pressure cavity 5
The sum of product is S, in the utility model, it is proposed that 0.2 < Sa/ S < 0.35.
As shown in figure 3, gas source is connect with air vent 8, vacuum generator is connect with venthole 9.High pressure gas Ps passes through
Air flue (air inlet 8-two annular balancing slits 7), isotropic porous material ring, as Oilite bronze ring 3 enters bearing clearance
H (gap between bearing working face 4 and thrust plate 1), forms relatively thin air film in the h of bearing clearance, into air film gap
Gas point both direction is discharged: gap of a part of Pa vertically between supporting element is flowed outwardly into atmosphere, and pressure is reduced to atmosphere
Pressure；Another part Pv inwardly flows through round negative pressure cavity 5 to venthole 9 and is taken away by vacuum generator.To in the workplace of bearing
Barotropic field and negative pressure region are formed in gap.Barotropic field generates buoyancy and floats bearing thrust face, makes it have certain hold
Loading capability, and negative pressure region applies certain load to bearing thrust face, reduces the bearing capacity of bearing.When the two reaches flat
Weighing apparatus state, air film gap maintain in a stable range, so that bearing is had a suitable rigidity, and can improve the steady of bearing
It is qualitative.Bearing is being lightly loaded, and 0.2 < SaUnder the operating condition of/S < 0.35, by improving Sa/ S value can effectively improve bearing rigidity, such as Fig. 4
Show the rigidity ratio of the bearing under different loads.
Although the utility model is described above in conjunction with attached drawing, the utility model is not limited to above-mentioned
Specific embodiment, the above mentioned embodiment is only schematical, rather than restrictive, the ordinary skill of this field
Personnel are under the enlightenment of the utility model, in the case where not departing from the utility model aims, can also make many variations, this
It belongs within the protection of the utility model a bit.
Claims (4)
1. a kind of vacuum adsorption porous gas static pressure thrust bearing, including bearing matrix (2), aerostatic bearing flow controller
With thrust plate (1), it is characterised in that:
The bearing matrix (2) is made of aluminum alloy materials, and round negative pressure is equipped at the lower end surface center of the bearing matrix (2)
Chamber (5), the top of the circle negative pressure cavity (5) are equipped with the central blind hole coaxial with the round negative pressure cavity (5), the bearing base
It is equipped with endless groove on the lower end surface of body (2), around the round negative pressure cavity (5), the section of the endless groove (6) is rectangle,
The groove top face of the endless groove (6) is equipped with two annular balancing slits (7)；
Porous material ring (3) as aerostatic bearing flow controller, the porous material ring are installed in the endless groove (6)
(3) it is made of isotropic porous material, material selects porous graphite, Oilite bronze, any one in porous stainless steel
Kind, the end face of the porous material ring (3) protrudes from the lower end surface of the bearing matrix (2)；
The side of the bearing matrix (2) is equipped with air vent (8) and venthole (9), and the air vent (8) is pressed with two annulars
Slot (7) communicates, and the venthole (9) communicates with the central blind hole, and the air vent (8) is handed in space with venthole (9)
Pitch into 90 degree.
2. vacuum adsorption porous gas static pressure thrust bearing according to claim 1, which is characterized in that the porous material
Expect that the endless groove (6) of ring (3) and bearing matrix (2) lower end surface cooperates, and is bonded with epoxy glue.
3. vacuum adsorption porous gas static pressure thrust bearing according to claim 1, which is characterized in that the porous material
The end face for expecting ring (3) is bearing working face (4), and the thrust plate (1) is oppositely arranged with the bearing working face (4).
4. vacuum adsorption porous gas static pressure thrust bearing according to claim 1, which is characterized in that described round negative
The circular cross-section product for pressing chamber (5) is Sa, the long-pending annular section with the endless groove (6) of the circular cross-section of the circle negative pressure cavity (5)
The sum of area is S, 0.2 < Sa/ S < 0.35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821289751.XU CN208919085U (en) | 2018-08-10 | 2018-08-10 | A kind of vacuum adsorption porous gas static pressure thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821289751.XU CN208919085U (en) | 2018-08-10 | 2018-08-10 | A kind of vacuum adsorption porous gas static pressure thrust bearing |
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| Publication Number | Publication Date |
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| CN208919085U true CN208919085U (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821289751.XU Active CN208919085U (en) | 2018-08-10 | 2018-08-10 | A kind of vacuum adsorption porous gas static pressure thrust bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825656A (en) * | 2018-08-10 | 2018-11-16 | 天津大学 | A kind of vacuum adsorption porous gas static pressure thrust bearing |
| CN113124057A (en) * | 2021-04-27 | 2021-07-16 | 北京工业大学 | Static pressure air-float thrust bearing based on multi-ring belt exhaust |
-
2018
- 2018-08-10 CN CN201821289751.XU patent/CN208919085U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825656A (en) * | 2018-08-10 | 2018-11-16 | 天津大学 | A kind of vacuum adsorption porous gas static pressure thrust bearing |
| CN113124057A (en) * | 2021-04-27 | 2021-07-16 | 北京工业大学 | Static pressure air-float thrust bearing based on multi-ring belt exhaust |
| CN113124057B (en) * | 2021-04-27 | 2022-07-22 | 北京工业大学 | Static pressure air-float thrust bearing based on multi-ring belt exhaust |
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