CN211059205U - Gas-oil double-layer lubrication hydrostatic bearing - Google Patents
Gas-oil double-layer lubrication hydrostatic bearing Download PDFInfo
- Publication number
- CN211059205U CN211059205U CN201922027140.9U CN201922027140U CN211059205U CN 211059205 U CN211059205 U CN 211059205U CN 201922027140 U CN201922027140 U CN 201922027140U CN 211059205 U CN211059205 U CN 211059205U
- Authority
- CN
- China
- Prior art keywords
- oil
- air
- shaft sleeve
- gas
- orifice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a gas-oily double-deck lubricated hydrostatic bearing, include: the oil inlet joint is connected to the oil path and is used for introducing pressurized lubricating oil into the external oil path pipeline and the oil path in the shaft sleeve so as to form oil films between the shaft diameters and the end surfaces of the shaft sleeve and the rotating shaft and between the shaft sleeve and the end surface of the thrust plate. In this way, the utility model discloses can be on traditional aerostatic bearing's basis, introduced a small amount of controllable lubricating oil and formed the oil film, compensatied aerostatic bearing, the not enough, poor disadvantage of rigidity of bearing capacity.
Description
Technical Field
The utility model relates to a hydrostatic bearing technical field especially relates to a gas-oily double-deck lubricated hydrostatic bearing.
Background
With the rapid development of leading-edge technologies such as national defense industry, aerospace and aviation, electronic technology and the like, the requirements on the precision of ultra-precision machining and ultra-precision measuring equipment are more and more strict. The development of ultra-precision machining and detection technology has become an important development direction in the current mechanical industry.
In ultra-precision machining and inspection equipment, extremely high requirements are placed on high speed and high motion accuracy of moving parts. The hydrostatic bearing is a sliding bearing which forcibly pumps pressure lubricant into a small gap between a bearing and a shaft by using a pressure pump, and is widely applied to a motion system of ultra-precision machining and detection equipment due to small friction factor, long service life and uniform temperature distribution.
The hydrostatic bearing lubricants can be classified into two types, one type of hydrostatic bearing is a hydrostatic bearing which mainly uses oil as a lubricant, the other type of hydrostatic bearing is a hydrostatic gas bearing which uses gas as a lubricant and mainly uses air as a lubricant; compared with a liquid lubricating oil film bearing, the aerostatic bearing utilizes air as a lubricating medium, and moving parts are not in direct contact, so that extremely low friction force and heat productivity are achieved; the air film has a homogenizing effect, so that the air film can ensure extremely low vibration at high-speed rotating speed, but the air film is easy to damage during overload to cause friction seizure of a moving part due to poor bearing capacity and low rigidity. The hydrostatic bearing is suitable for oil as a lubricating medium, has large bearing capacity and good rigidity, but is not suitable for high-speed scenes generally due to large viscous resistance.
In view of the above reasons, a gas-oil double-layer lubrication hydrostatic bearing scheme is especially provided to solve the problems of poor bearing capacity and low rigidity of the aerostatic bearing.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a double-deck lubricated hydrostatic bearing of gas-oil, on traditional aerostatic bearing's basis, has introduced a small amount of controllable lubricating oil and has formed the oil film, compensaties the disadvantage that aerostatic bearing capacity is not enough, rigidity is poor.
In order to solve the technical problem, the utility model discloses a technical scheme be: provided is a gas-oil double-layer lubrication hydrostatic bearing, including: the double-layer lubricating hydrostatic bearing comprises a rotating shaft, a shaft sleeve and a thrust plate, wherein the rotating shaft is arranged in the shaft sleeve, one end of the rotating shaft is fixedly connected with the thrust plate, and the double-layer lubricating hydrostatic bearing further comprises: the oil-gas compressor comprises a plurality of gas-oil throttlers, an air inlet joint, an oil inlet joint, an external air path pipeline and an external oil path pipeline, wherein the gas-oil throttlers are distributed on the end surface and the inner circumferential wall of the shaft sleeve and are communicated with the air path and the oil path in the shaft sleeve, the air inlet joint is connected to the air path and is used for introducing compressed air into the external air path pipeline and the air path in the shaft sleeve so as to form an air film between the shaft diameter and the end surface of the shaft sleeve and the rotating shaft and between the shaft sleeve and the end surface of the thrust plate, and the oil inlet joint is connected to the oil path and is used for introducing pressurized lubricating oil into the external oil path pipeline and the oil path in the shaft sleeve so as to form oil films between the shaft diameter and the end surface.
In a preferred embodiment of the present invention, the gas-oil restrictor comprises a restrictor body and a gas orifice, an oil orifice and an oil cavity provided on the restrictor body, the gas orifice is communicated with the gas passage in the shaft sleeve, and the oil orifice is communicated with the oil cavity and communicated with the oil passage in the shaft sleeve.
In a preferred embodiment of the present invention, the gas orifice is located in the middle of the restrictor body, and the oil orifice is located in a plurality of annular ring shapes uniformly surrounding the gas orifice at the circumference of the restrictor body 1/2.
In a preferred embodiment of the present invention, the oil orifice has an aperture of 1/2 times the air orifice aperture.
In a preferred embodiment of the present invention, the number of the oil throttling holes is 8.
In a preferred embodiment of the present invention, the air-oil restrictor is threadedly connected to the shaft sleeve.
In a preferred embodiment of the present invention, a straight groove is further formed on the bottom end surface of the throttle body.
In a preferred embodiment of the present invention, the sealing rings are installed at the orifice of the air throttle hole, the orifice of the oil throttle hole and the opening of the oil chamber.
In a preferred embodiment of the present invention, the external air path pipe is further provided with an air distribution block, the air distribution block is fixed on the shaft sleeve, the air inlet joint is installed on the air distribution block, an air inlet through hole is formed in the air distribution block, and the air inlet through hole forms an air path with the air inlet joint, the external air path pipe, the air path in the shaft sleeve and the air throttle hole in the air-oil throttle.
In a preferred embodiment of the present invention, the external oil path pipeline is further provided with an oil dividing block, the oil dividing block is fixed on the shaft sleeve, the oil inlet joint is installed on the oil dividing block, an oil inlet through hole is formed in the oil dividing block, and the oil inlet through hole forms an oil path with the oil inlet joint, the external oil path pipeline, the shaft sleeve internal oil path, the gas-oil throttle internal oil cavity, and the oil throttle hole.
The utility model has the advantages that: the utility model discloses a gas-oil throttle, air inlet joint, oil feed joint, outside gas circuit pipeline and the mutual complex structural design of outside oil circuit pipeline form independent gas circuit, oil circuit, introduce pressurized air, pressurized lubricating oil respectively to gas-oil throttle to form air film, oil film respectively between the axle diameter of axle sleeve and pivot and terminal surface, axle sleeve and thrust plate's terminal surface, promptly the utility model discloses on traditional aerostatic bearing's basis, introduced a small amount of controllable lubricating oil and formed the oil film, remedied aerostatic bearing, the bearing capacity is not enough, the poor disadvantage of rigidity; and only a small amount of oil film is formed, and the friction resistance is low, so that the high-speed rotating speed characteristic of the aerostatic bearing is still achieved.
Drawings
FIG. 1 is a schematic structural view of a gas-oil double layer lubrication hydrostatic bearing of the present invention;
FIG. 2 is a schematic view of the gas-oil restrictor of FIG. 1;
FIG. 3 is a schematic diagram of the gas-oil double layer lubrication hydrostatic bearing of the present invention;
FIG. 4 is an air intake schematic diagram of the air-oil double-layer lubrication hydrostatic bearing of the present invention;
FIG. 5 is an oil intake schematic diagram of the gas-oil double layer lubrication hydrostatic bearing of the present invention;
the parts in the drawings are numbered as follows: 1. the device comprises a rotating shaft, a shaft sleeve, a thrust plate, a gas-oil throttling device, a gas throttling hole, a oil throttling hole, a shaft sleeve, a thrust plate.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1, the present invention includes:
a gas-oil double layer lubricated hydrostatic bearing comprising: the static pressure bearing comprises a rotating shaft 1, a shaft sleeve 2 and a thrust plate 3, wherein the rotating shaft 1 is installed in the shaft sleeve 2, one end of the rotating shaft 1 is fixedly connected with the thrust plate 3 through a bolt, so that the thrust plate 3 can synchronously rotate along with the rotating shaft 1, the shaft sleeve 2 is in clearance fit with the shaft diameter and the end face of the rotating shaft 1, the end face of the shaft sleeve 2 is also in clearance fit with the thrust plate 3, an air path and an oil path are formed in the shaft sleeve 2, the air path and the oil path can be independently controlled, compressed air and compressed lubricating oil are respectively introduced into a gap from the air path and the oil path in order to enable the static pressure bearing to have excellent bearing capacity, an air film and an oil film are filled in the gap, and the dynamic performance of the static pressure bearing can be further controlled by adjusting parameters such as air-.
Specifically, the gas-oil double-layer lubrication hydrostatic bearing further comprises: the gas-oil flow restrictor comprises a plurality of gas-oil flow restrictors 4, an air inlet connector 5, an oil inlet connector 6, an external gas circuit pipeline 7 and an external oil circuit pipeline 8, wherein the plurality of gas-oil flow restrictors 4 are distributed on the end surface and the inner circumferential wall of the shaft sleeve 2 and are communicated with gas circuits and oil circuits in the shaft sleeve 2, in the embodiment, the number of the gas-oil flow restrictors 4 is 48, and the number of the gas-oil flow restrictors is respectively: 16 air-oil throttles 4 are circumferentially and evenly distributed on the inner circumferential wall of the shaft sleeve 2, wherein 32 air passages and oil passages in the inner circumferential wall are divided into 4 groups, each group of 8 air-oil throttles 4 is circumferentially and evenly distributed on the inner circumferential wall of the shaft sleeve 2, each air-oil throttler 4 is communicated with an air passage and an oil passage in the shaft sleeve 2, air entering from the air passage enters a gap between the shaft sleeve 2 and the shaft diameter and the end surface of the rotating shaft 1 and between the shaft sleeve 2 and the end surface of the thrust plate 3 through an air throttling hole 41 in the air-oil throttler 4, an air film is formed in the gap, lubricating oil entering from the oil passage enters a gap between the shaft diameter and the end surface of the shaft sleeve 2 and the rotating shaft 1 and between the shaft sleeve 2 and the end surface of the thrust plate 3 through an oil throttling hole 42 in the air-oil throttler 4, an oil film is formed in the gap, as shown in figure 3, a circle of the, a small amount of lubricating oil is introduced into the small holes to form an oil film shown in figure 3, the bearing capacity of the hydrostatic bearing is improved by using a small amount of liquid lubricating oil, and the defects of insufficient bearing capacity and poor rigidity of a common air hydrostatic bearing are overcome.
With continued reference to fig. 4 and 5, the air inlet joint 5 is connected to an air path and is configured to introduce compressed air into an external air path pipeline 7 and an air path in the shaft sleeve 2, so as to form an air film between the shaft sleeve 2 and the shaft diameter and the end surface of the rotating shaft 1, and between the shaft sleeve 2 and the end surface of the thrust plate 3, and the oil inlet joint 6 is connected to an oil path and is configured to introduce pressurized lubricating oil into an external oil path pipeline 8 and an oil path in the shaft sleeve 2, so as to form oil films between the shaft sleeve 2 and the shaft diameter and the end surface of the rotating shaft 1, and between the shaft sleeve 2 and the end surface of the.
With continued reference to fig. 2, the air-oil restrictor 4 includes a restrictor body, and an air orifice 41, an oil orifice 42 and an oil chamber 43 which are opened on the restrictor body, the oil orifice 42 is communicated with the oil chamber 43, the air orifice 41 is located in the middle of the restrictor body, the oil orifice 42 is provided with a plurality of orifices 1/2 which are located at the circumference and uniformly surround the air orifice 41 in an annular shape, in this embodiment, the oil orifice 42 is provided with 8 orifices, the center distance between the oil orifice 42 and the air orifice 41 is 1/2 of the radius of the bottom end face of the restrictor body, and the aperture of the oil orifice 42 is 1/2 of the aperture of the air orifice 41, so that a small amount of lubricating oil introduced from the oil orifice 42 forms an oil film as shown in fig. 3 during high-speed rotation of the hydrostatic bearing, so as to improve the bearing capacity of the hydrostatic bearing.
Preferably, the outer peripheral wall of the throttle body is provided with threads, and the bottom end face of the throttle body is also provided with a straight groove. Practical screwdriver rotates a word groove, will the flow controller body is twisted on axle sleeve 2, convenient to install and dismantle, convenient to use.
Furthermore, sealing rings are arranged at the hole of the air throttling hole 41, the hole of the oil throttling hole 42 and the opening of the oil cavity 43, so that gas is prevented from entering the oil cavity and oil liquid is prevented from leaking.
With continuing reference to fig. 4 and 5, an air distribution block 9 is further mounted on the external air passage pipeline 7, the air distribution block 9 is fixed on the shaft sleeve 2, the air inlet joint 5 is mounted on the air distribution block 9, an air inlet through hole is formed in the air distribution block 9, and the air inlet through hole is respectively communicated with the air inlet joint 5, the external air passage pipeline 7, an air passage in the shaft sleeve 2 and an air throttle hole 41 in the air-oil throttle 4, so that an air passage which is mutually communicated from the outside to the inside of the hydrostatic bearing is formed, compressed air is introduced into the air throttle hole 41, and an air film is formed in a small hole throttling manner;
still install on the outside oil circuit pipeline 8 and divide oil piece 10, divide oil piece 10 to fix on axle sleeve 2, oil feed joint 6 is installed divide on oil piece 10, divide and to have seted up the oil feed through-hole in oil piece 10, the oil feed through-hole communicates with oil feed joint 6, outside oil circuit pipeline 8, axle sleeve 2 interior oil pocket 43 of interior oil circuit and gas-oil throttle 4, oil orifice 42 respectively, forms the oil circuit that link up each other from hydrostatic bearing outside to inside to introduce compression lubricating oil to oil orifice 42, forms the oil film through the mode of aperture throttle.
To sum up, the utility model discloses can introduce a small amount of controllable lubricating oil and form the oil film on the basis of traditional aerostatic bearing, compensate aerostatic bearing capacity not enough, the poor defect of rigidity; and because only a small amount of oil films are formed, the frictional resistance is low, so that the hydrostatic bearing of the utility model still has the high-speed rotating speed characteristic of an aerostatic bearing; in addition, the gas distribution block and the oil distribution block are adopted to ensure that the formed gas path and the oil path are mutually independent, and the dynamic performance of the bearing rotary system can be further controlled by adjusting parameters such as gas-oil ratio, gas-oil pressure, gas-oil flow and the like.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A gas-oil double layer lubricated hydrostatic bearing comprising: pivot (1), axle sleeve (2), thrust plate (3), install pivot (1) in axle sleeve (2), the one end of pivot (1) with thrust plate (3) fixed connection, its characterized in that still includes: the air-oil flow restrictors (4) are distributed on the end surface and the inner circumferential wall of the shaft sleeve (2) and are communicated with an air passage and an oil passage in the shaft sleeve (2); the air inlet joint (5) is connected to an air path and is used for introducing compressed air into an external air path pipeline (7) and an air path in the shaft sleeve (2) so as to form air films between the shaft sleeve (2) and the rotating shaft (1) and between the shaft sleeve (2) and the thrust plate (3); the oil inlet joint (6) is connected to an oil path and used for introducing pressurized lubricating oil into an external oil path pipeline (8) and an oil path in the shaft sleeve (2) so as to form oil films between the shaft sleeve (2) and the rotating shaft (1) and between the shaft sleeve (2) and the thrust plate (3).
2. The gas-oil double-layer lubricating hydrostatic bearing of claim 1, wherein the gas-oil restrictor (4) comprises a restrictor body, and a gas orifice (41), an oil orifice (42) and an oil cavity (43) which are arranged on the restrictor body, the gas orifice (41) is communicated with the gas path in the shaft sleeve (2), and the oil orifice (42) is communicated with the oil cavity (43) and is communicated with the oil path in the shaft sleeve (2).
3. The double layer air-oil lubricated hydrostatic bearing of claim 2, wherein the air orifice (41) is located in the middle of the restrictor body, and the oil orifice (42) has a plurality of annular grooves evenly surrounding the air orifice (41) at the circumference of the restrictor body 1/2.
4. The double layer lubricated hydrostatic bearing according to claim 3, wherein the oil orifice (42) has a bore size of 1/2 times the bore size of the air orifice (41).
5. The double layer air-oil lubricated hydrostatic bearing according to claim 4, wherein the oil restriction holes (42) are 8.
6. The air-oil double layer lubrication hydrostatic bearing according to claim 2, wherein the air-oil restrictor (4) is in threaded connection with the shaft sleeve (2).
7. The gas-oil double-layer lubrication hydrostatic bearing of claim 2, wherein the bottom end face of the restrictor body is further provided with a straight groove.
8. The double layer gas-oil lubricated hydrostatic bearing according to claim 5, wherein sealing rings are mounted at the orifice of the gas throttling hole (41), the orifice of the oil throttling hole (42) and the orifice of the oil cavity (43).
9. The air-oil double-layer lubrication hydrostatic bearing according to any one of claims 1 to 8, wherein the external air passage pipeline (7) is further provided with an air distribution block (9), the air distribution block (9) is fixed on the shaft sleeve (2), the air inlet joint (5) is mounted on the air distribution block (9), and an air inlet through hole is formed in the air distribution block (9) and forms an air passage with the air inlet joint (5), the external air passage pipeline (7), an air passage in the shaft sleeve (2) and an air throttle hole in the air-oil throttle (4).
10. The gas-oil double-layer lubrication hydrostatic bearing according to any one of claims 1 to 8, wherein an oil distribution block (10) is further arranged on the external oil path pipeline (8), the oil distribution block (10) is fixed on the shaft sleeve (2), the oil inlet joint (6) is installed on the oil distribution block (10), an oil inlet through hole is formed in the oil distribution block (10), and the oil inlet through hole forms an oil path with the oil inlet joint (6), the external oil path pipeline (8), an oil path in the shaft sleeve (2), an oil chamber (43) in the gas-oil throttle (4), and an oil throttle hole (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027140.9U CN211059205U (en) | 2019-11-21 | 2019-11-21 | Gas-oil double-layer lubrication hydrostatic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027140.9U CN211059205U (en) | 2019-11-21 | 2019-11-21 | Gas-oil double-layer lubrication hydrostatic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211059205U true CN211059205U (en) | 2020-07-21 |
Family
ID=71588027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922027140.9U Active CN211059205U (en) | 2019-11-21 | 2019-11-21 | Gas-oil double-layer lubrication hydrostatic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211059205U (en) |
-
2019
- 2019-11-21 CN CN201922027140.9U patent/CN211059205U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103286679B (en) | A kind of ultrahigh speed air bearing electric main-shaft | |
| CN205350045U (en) | Gaseous journal bearing of slot type dynamic pressure | |
| CN108487949B (en) | Variable damping squeeze oil film damper for aircraft engine | |
| CN103047221B (en) | Double-action gas suspension is without friction cylinder | |
| CN111368486B (en) | Design method for hydrostatic support of spherical pump piston | |
| CN211059205U (en) | Gas-oil double-layer lubrication hydrostatic bearing | |
| CN103511385A (en) | High-frequency loading servo vibration hydraulic cylinder | |
| CN105275992B (en) | A kind of composite throttling formula hydrostatic gas-lubricated bearing being used in vacuum environment and its application method | |
| CN207709894U (en) | A kind of composite throttling formula static pressure air-bearing electro spindle | |
| CN106763190B (en) | A kind of intelligent dynamic and hydrostatic bearing based on negative poisson's ratio structure | |
| CN203305052U (en) | Ultrahigh-speed air-bearing electric spindle | |
| CN110778605A (en) | Gas-oil double-layer lubrication hydrostatic bearing | |
| CN205117990U (en) | A compound throttle formula static pressure gas bearing for among vacuum environment | |
| CN202065468U (en) | Corrugated slot sealing ring structure | |
| CN103047220A (en) | Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder | |
| CN113685440B (en) | Air supporting rotary assembly and contain its magnetic fluid seal | |
| CN203051294U (en) | Cylinder barrel air supply pressure-equalizing type air flotation non-friction air cylinder | |
| CN107100992B (en) | Automatic lubrication high-speed ball screw pair and method | |
| TWI646271B (en) | Porous media aerostatic bearing | |
| CN111709098B (en) | Method for reducing friction coefficient of bearing by changing lubricating oil under variable load | |
| CN108608015A (en) | A kind of gas eddy wheel drive high speed water lubrication dynamic and static pressure bearing rotor system | |
| CN114183469A (en) | Hydrostatic bearing | |
| CN205937481U (en) | A aerostatic bearing for high -speed air grinder | |
| CN109781409B (en) | Device capable of realizing ultrahigh-speed liquid film shearing characteristic and hydrostatic bearing characteristic test | |
| CN105485452A (en) | Double-roller-path support knuckle rotating joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |