Self-cooling air bearing

Abstract

The utility model discloses a self-cooling air bearing which comprises a thrust plate, a cover plate and a bearing body, the thrust plate and the cover plate are respectively attached to two end faces of the bearing body, an axis hole for a main shaft to penetrate through is arranged on the bearing body, a plurality of air holes are arranged around the axis hole, and the air holes are communicated with the thrust plate. The air hole penetrates from the outer surface of the bearing body to the axis hole, and a nozzle is arranged on the surface, close to the axis hole, in the air hole; a plurality of water passing holes are evenly formed in the bearing body around the axis hole, the water passing holes extend in the axial direction and are staggered with the air holes, the water passing holes are communicated end to end to form a closed water channel, and a water inlet hole and a water outlet hole are formed in the bearing body. And the water inlet hole and the water outlet hole are respectively communicated to two ends of the water channel from the outer surface of the bearing body. Heat generated when the main shaft rotates at a high speed can be rapidly taken away, so that the bearing is in a proper temperature range, the service life of the bearing is prolonged, and the main shaft operates more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a self-cooling air bearing. Background Art

[0002] Air bearings are sliding bearings that use gas as a lubricant. Air has lower viscosity than oil, is resistant to high temperatures, and is pollution-free. Therefore, it can be used in high-speed machines, instruments, and radioactive devices. Air bearings provide extremely high radial and axial rotational accuracy. Since there is no mechanical contact, wear is minimized, ensuring that accuracy remains stable. The low friction and stable air flow of air bearings help minimize temperature rise. However, if the temperature rises too high, it may affect the performance and accuracy of the bearing, especially in high-speed or high-precision applications. Long-term heating may accelerate the aging of the bearing material, thereby reducing its service life. Therefore, it is necessary to ensure that the bearing operates within the optimal temperature range. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the present invention is to provide a self-cooling air bearing that can quickly remove the heat generated by the spindle when it runs at high speed, so that the bearing is kept within an appropriate temperature range.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A self-cooling air bearing comprises a thrust plate, a cover plate and a bearing body, wherein the thrust plate and the cover plate are respectively fitted with the two end faces of the bearing body, the bearing body is provided with an axial hole for the main shaft to pass through, a plurality of air holes are provided around the axial hole, the air holes extend from the outer surface of the bearing body to the axial hole, and a nozzle is provided on the surface of the air hole near the axial hole; a plurality of water holes are evenly arranged around the axial hole in the bearing body, the water holes extend axially and are staggered with the air holes, and a plurality of the water holes are connected end to end to form a closed water channel, and a water inlet hole and a water outlet hole are provided on the bearing body, and the water inlet hole and the water outlet hole are respectively connected from the outer surface of the bearing body to the two ends of the water channel.

[0006] Preferably, a plurality of grooves are provided around the axial hole on the two end faces of the bearing body, the thrust plate and the cover plate are respectively attached to the two end faces and form a closed cavity with the grooves, the same cavity is connected to two parallel water holes, and the grooves on different end faces are staggered to connect adjacent water holes end to end.

[0007] Preferably, a first sealing ring and a second sealing ring surrounding the axial center hole are provided between the thrust plate and the end surface of the bearing body, and the cavity is located between the first sealing ring and the second sealing ring.

[0008] Preferably, the axis of the air hole intersects the axis of the axial hole perpendicularly.

[0009] Preferably, the bearing body is integrally formed.

[0010] Preferably, the water hole is close to the surface of the axial hole.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] The utility model relates to a self-cooling air bearing comprising a thrust plate, a cover plate and a bearing body, wherein the thrust plate and the cover plate are respectively fitted with the two end faces of the bearing body, an axial hole for the main shaft to pass through is provided on the bearing body, a plurality of air holes are provided around the axial hole, the air holes extend from the outer surface of the bearing body to the axial hole, a nozzle is provided on the surface of the air hole close to the axial hole, gas is sprayed into the interior to form an air film, a plurality of water holes are evenly provided around the axial hole in the bearing body, the water holes extend axially and are staggered with the air holes, and the plurality of water holes are connected end to end to form a closed water channel, a water inlet hole and a water outlet hole are provided on the bearing body, the water inlet hole and the water outlet hole are respectively connected from the outer surface of the bearing body to the two ends of the water channel, so as to quickly take away the heat generated when the main shaft rotates at high speed, so that the bearing is within a suitable temperature range, the service life of the bearing is extended, and the operation of the main shaft is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The technical solution of the utility model is further described below with reference to the accompanying drawings:

[0014] Attachment Figure 1 A perspective view of the self-cooling air bearing of the present invention;

[0015] Attachment Figure 2 A three-dimensional diagram of the self-cooling air bearing of the present invention from another perspective;

[0016] Attachment Figure 3 A three-dimensional diagram of the bearing body of the self-cooling air bearing of the present invention;

[0017] Attachment Figure 4 This is a front view of the bearing body of the self-cooling air bearing of the present invention;

[0018] Attachment Figure 5 This is an exploded view of the self-cooling air bearing of the utility model.

[0019] Among them: 1. thrust plate; 2. cover plate; 3. bearing body; 4. axial hole; 5. air hole; 6. nozzle; 7. water hole; 8. water inlet hole; 9. water outlet hole; 10. groove; 11. first sealing ring; 12. second sealing ring; 13. ring groove. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] As attached Figure 1 , Attachment Figure 2 The figure shows a self-cooling air bearing according to the present invention, comprising a thrust plate 1, a cover plate 2, and a bearing body 3. The thrust plate 1 and cover plate 2 are respectively fitted to the two end faces of the bearing body 3. The thrust plate 1 is completely submerged in the body, effectively preventing dust from entering the main shaft. The bearing body 3 has an axial hole 4 through which the main shaft passes. Surrounding this axial hole 4 are several air holes 5, which extend from the outer surface of the bearing body 3 to the axial hole 4. The axis of the air holes 5 intersects perpendicularly with the axis of the axial hole 4, creating a uniform and stable airflow. A nozzle 6 is embedded in the air holes 5 near the surface of the axial hole 4, spraying gas into the interior to form an air film.

[0023] Several water holes 7 are evenly machined around the axial hole 4 in the bearing body 3. The water holes 7 extend axially and are staggered with the air holes 5. Several water holes 7 are connected end to end to form a closed water channel. The bearing body 3 is machined with a water inlet hole 8 and a water outlet hole 9. The water inlet hole 8 and the water outlet hole 9 are connected from the outer surface of the bearing body 3 to the two ends of the water channel respectively, so as to quickly remove the heat generated by the high-speed rotation of the main shaft, so that the bearing is within a suitable temperature range and the air film remains stable to avoid affecting the load-bearing capacity and stability of the air film. The water holes 7 are close to the surface of the axial hole 4, closer to the heat generation point, and can more efficiently remove the heat. The bearing body 3 is integrally formed, which not only saves processing costs but also better ensures the concentricity of the front and rear bearings, making the rotor more stable when running at high speeds.

[0024] As attached Figure 3 , Attachment Figure 4As shown, a number of grooves 10 are machined around the axial center hole 4 on the two end faces of the bearing body 3. The thrust plate 1 and the cover plate 2 are respectively attached to the two end faces and form a closed cavity with the grooves 10. The same cavity is connected to two parallel water holes 7. Adjacent water holes 7 are not connected to the same two grooves 10 at the same time. The grooves 10 on different end faces are staggered so that adjacent water holes 7 are connected end to end. A first sealing ring 11 and a second sealing ring 12 are installed around the axial center hole 4 between the end faces of the thrust plate 1 and the bearing body 3, and the cavity is located between the first sealing ring 11 and the second sealing ring 12. Similarly, a first sealing ring 11 and a second sealing ring 12 are also installed between the end faces of the cover plate 2 and the bearing body 3. Two concentric annular grooves 13 are machined on the side of the thrust plate 1 and the cover plate 2 close to the end face of the bearing body 3. The first sealing ring 11 and the second sealing ring 12 are embedded in the annular grooves 13 to ensure that the cavity maintains good sealing performance and prevent water leakage.

[0025] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-cooling air bearing, characterized in that: It includes a thrust plate, a cover plate and a bearing body, the thrust plate and the cover plate are respectively fitted with the two end faces of the bearing body, the bearing body is provided with an axial hole for the main shaft to pass through, and a plurality of air holes are provided around the axial hole, the air holes pass through from the outer surface of the bearing body to the axial hole, and a nozzle is provided on the surface of the air hole close to the axial hole; a plurality of water holes are evenly arranged around the axial hole in the bearing body, the water holes extend axially and are staggered with the air holes, and a plurality of the water holes are connected end to end to form a closed water channel, and a water inlet hole and a water outlet hole are provided on the bearing body, and the water inlet hole and the water outlet hole are respectively connected from the outer surface of the bearing body to the two ends of the water channel.

2. The self-cooling air bearing according to claim 1, characterized in that: A number of grooves are provided on the two end faces of the bearing body around the axial hole. The thrust plate and the cover plate are respectively attached to the two end faces and form a closed cavity with the grooves. The same cavity is connected to two parallel water holes. The grooves on different end faces are staggered to connect adjacent water holes end to end.

3. The self-cooling air bearing according to claim 2, characterized in that: A first sealing ring and a second sealing ring surrounding the axial center hole are provided between the thrust plate and the end surface of the bearing body, and the cavity is located between the first sealing ring and the second sealing ring.

4. The self-cooling air bearing according to claim 1, wherein: The axis line of the air hole intersects the axis line of the axial hole vertically.

5. The self-cooling air bearing according to claim 1, wherein: The bearing body is integrally formed.

6. The self-cooling air bearing according to claim 1, wherein: The water hole is close to the surface of the axial hole.

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