CN210859563U

CN210859563U - Air bearing

Info

Publication number: CN210859563U
Application number: CN201921846050.6U
Authority: CN
Inventors: 毛卫华
Original assignee: Beijing Linghe Technology Development Co ltd
Current assignee: Hebei Linghe Technology Co ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-06-26
Anticipated expiration: 2029-10-30

Abstract

The utility model provides an air supporting bearing, fill up including bearing body and pressure-equalizing, the bearing body adopts the carborundum material, bearing body top is provided with inlays the hole, the pressure-equalizing pad is arranged in and is inlayed downtheholely, and cooperatees with inlaying the hole size, the inside air duct that communicates each other that is provided with of bearing body, the lateral part of bearing body has the inlet port that is linked together with the air duct, the bottom of bearing body is provided with the exhaust hole that is linked together with the air duct, the pressure-equalizing is stacked up and is provided with the pilot hole. The bearing body is made of silicon carbide and has the excellent characteristics of strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high-temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance, chemical corrosion resistance and the like, the pressure equalizing pad is made of low-expansion alloy, the excellent characteristics of the silicon carbide are fully utilized, the defect of high brittleness of the silicon carbide is overcome, and the bearing can work in severe environments with high temperature or large temperature difference change and the like.

Description

Air bearing

Technical Field

The utility model relates to a bearing field among the mechanical component especially relates to an air supporting bearing.

Background

Air bearings, also called air bearings, are mechanical components that use an air film to support a load or reduce friction. The air bearing is a new type of sliding bearing and rotary bearing, and has the advantages of high speed, high precision, low power consumption and long service life. The method has important application in the fields of precision and ultra-precision engineering, micro engineering, space technology, aerospace medical instruments, nuclear energy engineering and the like.

With the development of science and technology, especially the high development of energy and space technology, the materials must have high temperature resistance, corrosion resistance, wear resistance and other excellent performances, so that the materials can be used in a harsher working environment. The rigidity of the silicon carbide is 2 times that of common carbon steel and 5 times that of aluminum alloy, so that the silicon carbide is not easy to deform; in the aspect of temperature, because the silicon carbide has low expansion coefficient which is only about 70 percent of that of steel and is 1/4-1/5 of aluminum alloy, the low temperature is slightly influenced by the temperature, and the constant temperature is not used for ensuring the characteristics of the silicon carbide; the hardness of the diamond is high, and the diamond is second to diamond, so that the diamond is very wear-resistant and is not easy to scratch; stable chemical property and corrosion resistance. The silicon carbide material has the excellent characteristics of strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high-temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance, chemical corrosion resistance and the like, and becomes an important component of advanced science, and is generally regarded. And the silicon carbide material has small hardness and large brittleness, is not easy to process, and has the defects of instability, small bearing capacity, low rigidity and the like easily caused by improper design, so that the air bearing is easily abraded in the operation process, and the service life is short.

Therefore, there is a need in the art for an air bearing.

In view of this, the present invention is proposed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air bearing to solve at least one above-mentioned technical problem.

Specifically, the utility model provides an air supporting bearing, fill up including bearing body and uniform pressure, the bearing body adopts the carborundum material, bearing body top is provided with inlays the hole, the uniform pressure pad is arranged in and is inlayed downtheholely, and cooperatees with inlaying the hole size, the inside air duct that communicates each other that is provided with of bearing body, the lateral part of bearing body has the inlet port that is linked together with the air duct, the bottom of bearing body is provided with the exhaust hole that is linked together with the air duct, be provided with the pilot hole on the uniform pressure pad.

By adopting the scheme, the bearing body is made of the silicon carbide material and has the excellent characteristics of strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high-temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance, chemical corrosion resistance and the like, the air passages are inflated through the air inlet holes, are mutually communicated and balance air pressure, and are convenient to process due to high brittleness of the silicon carbide, the structural mechanical property is ensured, the pressure equalizing pad is made of the metal material and mainly made of low-expansion alloy, the expansion difference between the pressure equalizing pad and the silicon carbide is reduced, the assembly holes are used for loading workpieces and uniformly distributing pressure on the bearing body, and the air floatation bearing fully utilizes the excellent characteristics of the silicon carbide material, overcomes the defect of high brittleness of the silicon carbide and can work in severe environments with high temperature or large temperature difference change and the like.

Further, the air duct horizontally penetrates through the air bearing, an internal thread is arranged at an opening of the side wall of the bearing body of the air duct, and the air blocking plug is connected through threads.

By adopting the scheme, the air duct is convenient for processing silicon carbide materials, the yield of the prepared bearing body is improved, and the air plugs seal the two ends of the air duct so as to prevent gas leakage from affecting the size of load and the stability of bearing operation.

Furthermore, the number of the exhaust holes can be at least 1, and the exhaust holes are uniformly distributed.

By adopting the scheme, the exhaust holes are used for exhausting, so that the air film is formed between the bottom surface of the bearing body and the plane where the bearing body is located, the exhaust holes are uniformly arranged to exhaust, the thickness of the air film is uniform, and the stable operation of the bearing body is facilitated.

Furthermore, a throttling plug with the matched size is arranged in the outer end of the exhaust hole, and a through throttling hole is formed in the axis of the throttling plug.

Preferably, assuming that the diameter of the exhaust hole is a and the diameter of the throttle hole is b, the following conditions are satisfied: 1/30a is not less than b is not less than 1/10 a.

By adopting the scheme, the air flow in the air passage is limited by the throttling plug at the outer end of the exhaust hole and can only pass through the throttling hole, the diameter of the throttling hole is far smaller than that of the exhaust hole, the air flow passing through is reduced, the thickness of an air film is reduced, and the air bearing can run more stably.

Further, the exhaust hole and the throttle plug are fixedly connected through glue.

Preferably, the glue is made of epoxy resin materials.

By adopting the scheme, the exhaust hole is fixedly connected with the throttle plug to prevent displacement.

Further, the bottom of the bearing body is provided with a pressure equalizing groove, and the pressure equalizing groove is communicated with all the exhaust holes. When the exhaust hole is one, the pressure equalizing grooves may be radially distributed with the exhaust hole as a center.

Preferably, the cross section of the pressure equalizing groove is semicircular, V-shaped or U-shaped.

By adopting the scheme, the pressure equalizing groove enables the gas film to be formed more uniformly, the gas outlet pressure of each throttling hole is balanced, and the bearing body is more stable.

Furthermore, a limiting hole is formed in the pressure equalizing pad.

By adopting the scheme, the limiting hole is used for limiting the workpiece assembled in the assembling hole, so that the workpiece and the assembling hole are prevented from rotating.

Further, a step is arranged in the assembling hole, and an inwards concave round angle is arranged at the step.

By adopting the scheme, the assembling hole is suitable for assembling workpieces with different diameters and is also suitable for assembling workpieces with spherical end surfaces.

Preferably, the circle center of the concave fillet and the opening surface of the assembly hole are in the same plane.

By adopting the scheme, the installation of the spherical workpiece in the assembling hole is facilitated, and the spherical workpiece is more stable.

Further, the section of the embedding hole is triangular, rectangular, polygonal, elliptical or wavy circular.

By adopting the scheme, the pressure equalizing pad is also triangular, rectangular, polygonal, elliptical or wavy circular, generates a limiting effect after being matched with the embedding hole, does not generate rotary displacement, and ensures that the air bearing runs more stably.

Further, the pressure equalizing pad is fixedly connected with the bearing body through glue.

Preferably, the glue is made of epoxy resin materials.

By adopting the scheme, the rubber is high-temperature resistant, has a damping function, and prevents the bearing body from being damaged due to too large impact.

Further, inlay hole bottom and also be provided with the exhaust hole with the air duct intercommunication.

Furthermore, the bottom of the embedding hole is also provided with a pressure equalizing groove.

By adopting the scheme, the pressure of the pressure equalizing pad on the embedding hole is reduced, the bearing capacity of the air bearing is improved, even an air film is generated between the embedding hole and the pressure equalizing pad, the impact of the air film is slowed down, and the damping effect is achieved.

To sum up, the utility model discloses following beneficial effect has:

1. the bearing body is made of the silicon carbide material, so that the bearing has the excellent characteristics of strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high-temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance, chemical corrosion resistance and the like, the pressure equalizing pad is made of the metal material, the excellent characteristics of the silicon carbide material are fully utilized, the defect of high brittleness of the silicon carbide is overcome, and the bearing can work in severe environments with high temperature or large temperature difference change and the like;

2. the air channel structure is convenient for processing silicon carbide materials, the yield of finished products for preparing the bearing body is improved, and the air plugs seal the two ends of the air channel so as to prevent air leakage from influencing the size of load and the stability of bearing operation;

3. through the arrangement of the exhaust hole structure, the exhaust is uniform, the thickness of an air film is uniform, and the stable operation of the bearing body is facilitated;

4. the pressure equalizing grooves enable the air film to be formed more uniformly, balance the air outlet pressure of each air outlet hole and enable the bearing body to be more stable;

5. the limiting hole is used for limiting a workpiece assembled in the assembling hole and preventing the workpiece and the assembling hole from rotating;

6. the glue is high temperature resistant, and prevents the bearing body from being damaged due to too large impact.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective view of an embodiment of an air bearing of the present invention;

FIG. 2 is a bottom view of an embodiment of the air bearing of the present invention;

FIG. 3 is an exploded view of an embodiment of the air bearing of the present invention;

FIG. 4 is a perspective view of an embodiment of an air bearing of the present invention;

FIG. 5 is a top view of an embodiment of the air bearing of the present invention;

FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 8 is a perspective view of another embodiment of an air bearing of the present invention;

FIG. 9 is a perspective view of another embodiment of an air bearing of the present invention;

FIG. 10 is a perspective view of another embodiment of an air bearing of the present invention from another perspective;

FIG. 11 is an assembly view of an embodiment of the air bearing of the present invention;

description of the reference numerals

Through the above reference sign explanation, combine the embodiment of the utility model, can more clearly understand and explain the technical scheme of the utility model.

1. A bearing body; 11. embedding holes; 12. an air duct; 121. blocking an air plug; 13. an air inlet; 14. an exhaust hole; 141. a throttle plug; 15. a pressure equalizing groove; 2. a pressure equalizing pad; 21. an assembly hole; 211. concave round corners; 22. a limiting hole; 31. connecting the workpieces; 32. a ball head screw; 33. limiting stop nails; 34. a slide rail.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The present invention will be described in detail below by way of examples.

Example one

Referring to fig. 1-4, the utility model provides an air bearing, including bearing body 1 and pressure-equalizing pad 2, bearing body 1 adopts the carborundum material, bearing body 1 top is provided with inlays hole 11, pressure-equalizing pad 2 is arranged in and is inlayed in hole 11, and cooperatees with inlaying hole 11 size, the inside air duct 12 that communicates each other that is provided with of bearing body 1, bearing body 1's lateral part has the inlet port 13 that is linked together with air duct 12, bearing body 1's bottom is provided with the exhaust hole 14 that is linked together with air duct 12, be provided with pilot hole 21 on the pressure-equalizing pad 2. The bearing body 1 is circular in cross section, and the section of the embedding hole 11 is circular.

By adopting the scheme, the bearing body 1 is made of silicon carbide and has the excellent characteristics of strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high-temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance, chemical corrosion resistance and the like, the air duct 12 is inflated through the air inlet holes 13, the air duct 12 is communicated with each other, the air pressure is balanced, the processing is convenient due to high silicon carbide brittleness, the structural mechanical property is ensured, the pressure equalizing pad 2 is made of metal and is mostly made of low-expansion alloy, the expansion difference between the pressure equalizing pad and the silicon carbide is reduced, the assembly holes 21 are used for loading workpieces, the pressure is uniformly distributed on the bearing body 1, the air floatation bearing fully utilizes the excellent characteristics of the silicon carbide material, overcomes the defect of high silicon carbide brittleness, and can work in severe environments such as high temperature or large temperature difference change and the like.

In a preferred embodiment of this embodiment, the air duct 12 horizontally penetrates through the air bearing, and the air duct 12 is provided with an internal thread at the opening of the side wall of the bearing body 1, and is connected with the air blocking plug 121 through a thread.

By adopting the scheme, the air duct 12 is convenient for processing silicon carbide materials, the yield of the prepared bearing body 1 is improved, and the air plugs 121 seal two ends of the air duct 12 so as to prevent gas leakage from influencing the size of load and the stability of bearing operation.

In a preferred embodiment of this embodiment, the number of the exhaust holes 14 is six, and the exhaust holes are uniformly distributed in a ring shape.

By adopting the scheme, the exhaust holes 14 are used for exhausting, so that an air film is formed between the bottom surface of the bearing body 1 and the plane where the bottom surface of the bearing body is located, the exhaust holes 14 are uniformly arranged to exhaust air, the thickness of the air film is uniform, and the stable operation of the bearing body 1 is facilitated.

In a preferred embodiment of the present embodiment, a throttle plug 141 with a large size and a small size is provided in an outer end of the exhaust hole 14, and a through throttle hole is provided in an axial center of the throttle plug 141.

In a preferred embodiment of the present embodiment, assuming that the diameter a of the exhaust hole 14 is 3mm and the diameter b of the orifice, the following are satisfied: b is 0.1 mm.

By adopting the scheme, the airflow in the air duct 12 is limited by the throttle plug 141 at the outer end of the exhaust hole 14 and can only pass through the throttle hole, and the diameter of the throttle hole is far smaller than that of the exhaust hole 14, so that the airflow passing is reduced, the thickness of an air film is reduced, and the air bearing can run more stably.

In a preferred embodiment of this embodiment, the exhaust hole 14 and the throttle plug 141 are fixedly connected by glue.

In a preferred embodiment of this embodiment, the glue is made of epoxy resin.

By adopting the scheme, the exhaust hole 14 is fixedly connected with the throttle plug 141 to prevent displacement.

In a preferred embodiment of the present embodiment, the bottom of the bearing body 1 is provided with a pressure equalizing groove 15, and the pressure equalizing groove 15 communicates with all the exhaust holes 14.

In a preferred embodiment of this embodiment, the cross section of the pressure equalizing groove 15 is an equilateral triangle.

In a preferred embodiment of the present embodiment, the length of the cross-section side of the pressure equalizing groove 15 is the same as the diameter of the orifice.

By adopting the scheme, the pressure equalizing groove 15 enables the air film to be formed more uniformly, and the air outlet pressure of each exhaust hole 14 is balanced, so that the bearing body 1 is more stable.

In a preferred embodiment of the present embodiment, the pressure equalizing pad 2 is provided with a limiting hole 22.

By adopting the scheme, the limiting hole 22 is used for limiting the workpiece assembled in the assembling hole 21, so that the workpiece and the assembling hole 21 are prevented from rotating. Referring to fig. 11, the air bearing is disposed on a slide rail 34, the connecting workpiece 31 is disposed above the air bearing, the ball head screw 32 extends into the assembling hole 21, and the limit stop pin 33 on the connecting workpiece 31 extends into the limit hole 22.

In a preferred embodiment of the present embodiment, a step is provided in the fitting hole 21, and the step is provided with a concave fillet 211.

By adopting the scheme, the assembling hole 21 is suitable for assembling workpieces with different diameters and is also suitable for assembling workpieces with spherical end surfaces.

In a preferred embodiment of this embodiment, the center of the concave rounded corner 211 is in the same plane with the opening surface of the mounting hole 21.

By adopting the scheme, the installation of the spherical workpiece in the assembling hole 21 is facilitated, and the spherical workpiece is more stable.

Example two

The structure of the present embodiment is substantially the same as that of the first embodiment, and the same reference numerals are used for the same components, except that: the pressure equalizing pad 2 is fixedly connected with the bearing body 1 through glue.

In a preferred embodiment of this embodiment, the glue is made of epoxy resin.

By adopting the scheme, the glue is high-temperature resistant, has a damping function and prevents the bearing body 1 from being damaged due to too large impact.

EXAMPLE III

The structure of the present embodiment is substantially the same as that of the first embodiment, and the same reference numerals are used for the same components, except that: the diameter b of the throttle hole satisfies: b is 0.15 mm.

Example four

The structure of the present embodiment is substantially the same as that of the first embodiment, and the same reference numerals are used for the same components, except that: the diameter b of the throttle hole satisfies: b is 0.3 mm.

EXAMPLE five

Referring to fig. 5-7, the present embodiment has substantially the same structure as the first embodiment, and the same components are denoted by the same reference numerals, except that: the bottom of the embedding hole 11 is also provided with an exhaust hole 14 communicated with the air duct 12.

In a preferred embodiment of the present embodiment, the bottom of the embedding hole 11 is also provided with a pressure equalizing groove 15.

By adopting the scheme, the pressure of the pressure equalizing pad 2 on the embedding hole 11 is reduced, the bearing capacity of the air bearing is improved, even an air film is generated between the embedding hole 11 and the pressure equalizing pad 2, the air film slows down the impact, and the shock absorption effect is achieved.

EXAMPLE six

Referring to fig. 8-9, this embodiment is substantially the same as the first embodiment, and like parts are given like reference numerals, except that: the bearing body 1 is rectangular, and the sections of the embedding hole 11 and the pressure equalizing pad 2 are both rectangular; the number of the exhaust holes 14 is eight, and the exhaust holes are uniformly distributed in an array.

By adopting the scheme, after the pressure equalizing pad 2 is matched with the embedding hole 11, a limiting effect is generated, and the rotary displacement cannot occur, so that the air bearing operates more stably.

By adopting the scheme, the airflow distribution at the bottom of the embedding hole 11 is more uniform.

It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall into the protection scope of the claims of the present invention.

Claims

1. An air bearing, characterized in that: including bearing body (1) and voltage-sharing pad (2), bearing body (1) adopts the carborundum material, bearing body (1) top is provided with inlays hole (11), voltage-sharing pad (2) are arranged in and are inlayed hole (11), and cooperate with inlaying hole (11) size, bearing body (1) inside is provided with air duct (12) of mutual intercommunication, the lateral part of bearing body (1) has inlet port (13) that are linked together with air duct (12), the bottom of bearing body (1) is provided with exhaust hole (14) that are linked together with air duct (12), be provided with pilot hole (21) on voltage-sharing pad (2).

2. The air bearing of claim 1, wherein: the air passage (12) horizontally penetrates through the air bearing, internal threads are arranged at an opening of the side wall of the bearing body (1) of the air passage (12), and an air blocking plug (121) is connected through the threads.

3. The air bearing of claim 2, wherein: a throttling plug (141) with the matched size is arranged in the outer end of the exhaust hole (14), and a through throttling hole is formed in the axis of the throttling plug (141).

4. The air bearing of claim 3, wherein: the diameter of the exhaust hole (14) is a, the diameter of the throttling hole is b, and the following requirements are met: 1/30a is not less than b is not less than 1/10 a.

5. The air bearing of claim 3, wherein: the bearing is characterized in that a pressure equalizing groove (15) is formed in the bottom of the bearing body (1), and all exhaust holes (14) are communicated through the pressure equalizing groove (15).

6. The air bearing of claim 1, wherein: and a limiting hole (22) is formed in the pressure equalizing pad (2).

7. The air bearing of claim 6, wherein: a step is arranged in the assembling hole (21), and an inward concave round angle (211) is arranged at the step.

8. The air bearing of claim 7, wherein: the circle center of the concave round corner (211) and the opening surface of the assembling hole (21) are positioned on the same plane.

9. The air bearing as recited in any one of claims 1-8, wherein: the pressure equalizing pad (2) is fixedly connected with the bearing body (1) through glue.

10. The air bearing of claim 9, wherein: the glue is made of epoxy resin materials.