Air bearing for air suspension centrifugal water chiller

Abstract

The air bearing comprises a bearing shell and a sealing cover, a sealing plate is arranged on the inner side of one end of the bearing shell, a porous throttling ring is arranged on the inner side of the sealing plate, a supporting ring is arranged on the surface of the inner side of the porous throttling ring, a rotor is arranged on the inner side of the supporting ring, and the sealing cover is arranged on the inner side of the rotor. The porous throttling ring is arranged in the bearing shell, the air chambers are arranged in the bearing shell and on the outer side of the porous throttling ring, the air films are arranged in the porous throttling ring and on the outer side of the rotor, and the flow isolation ring is arranged on one side in the porous throttling ring. A uniform state can be provided for an air film in the building process, contact collision between a rotor and the inner wall of an air bearing shell caused by uneven airflow pressure of the air film is prevented, damage to the rotor is avoided, and the contact area between the rotor and the interior of the porous throttling ring can be reduced through the supporting ring.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical bearings, and particularly relates to an air floating bearing for an air suspended centrifugal chiller. Background Art

[0002] An air floating bearing, also called a gas bearing, refers to a sliding bearing that uses gas, usually air, but may also be other gases, as a lubricant.

[0003] At present, there may be some instabilities during the startup process of the air floating bearing. Since it takes time to establish the air film, it is easy to cause the rotor to come into contact and collide with the inner wall of the air floating bearing housing, resulting in damage to the rotor. Content of the Utility Model

[0004] The purpose of the utility model is to provide an air floating bearing for an air suspended centrifugal chiller, which can solve the unstable state of the rotor inside the air floating bearing during the establishment of the air film, and prevent the rotor from coming into contact and colliding with the inner wall of the air floating bearing housing, resulting in damage to the rotor.

[0005] To achieve the above purpose, an air floating bearing for an air suspended centrifugal chiller is provided, which includes a bearing housing and a sealing cover. One end of the inner side of the bearing housing is provided with a sealing plate, a porous throttle ring is arranged inside the sealing plate, a support ring is arranged on the inner surface of the porous throttle ring, a rotor is arranged inside the support ring, an air chamber is arranged inside the bearing housing and outside the porous throttle ring, an air film is arranged inside the porous throttle ring and outside the rotor, a flow dividing ring is arranged on one side inside the porous throttle ring, a sealing groove and a threaded groove are respectively arranged on the circumferential surface around the other end of the bearing housing, a ventilation hole is arranged in the middle of the sealing cover, a sealing ring and a threaded ring are respectively arranged on the circumferential surface inside the sealing cover, a current collecting ring is arranged inside the sealing cover, and a current collecting groove is arranged in the middle of the current collecting ring.

[0006] According to the air floating bearing for an air suspended centrifugal chiller, the bearing housing is made of tungsten cobalt alloy material. The sealing plate is fixedly welded to the inner side of one end of the bearing housing. The porous throttle ring is fixedly in contact with the inner side of the sealing plate. The porous throttle ring forms a supported and suspended effect with the inside of the bearing housing through the fixed connection on the inner side of the sealing plate.

[0007] According to the air floating bearing for an air suspended centrifugal chiller, two support rings are provided. Both of the two support rings are fixedly in contact with the two end surfaces on the inner side of the porous throttle ring. The diameter of the rotor is smaller than that of the support ring, and the rotor is in contact with the inner side of the support ring.

[0008] According to the aerostatic bearing for an aerostatic centrifugal chiller described above, the space left inside the bearing housing and outside the porous throttle ring forms an air chamber, and the space left inside the porous throttle ring and outside the rotor forms an air film.

[0009] According to the aerostatic bearing for an aerostatic centrifugal chiller described above, the baffle ring is fixedly connected to one side inside the porous throttle ring.

[0010] According to the aerostatic bearing for an aerostatic centrifugal chiller described above, both the sealing groove and the threaded groove are fitted and recessedly connected to the peripheral surface at the other end of the bearing housing. Both the sealing ring and the threaded ring are fixedly and contact-connected to the peripheral surface inside the sealing cover. The sealing cover is hermetically and contact-connected to the outer surface of the bearing housing through the threaded sealing connection between the threaded groove and the threaded ring. The sealing ring is made of rubber material, and the sealing ring is in contact connection with the inside of the sealing groove. The diameters of both the sealing ring and the sealing groove are larger than those of the threaded ring and the threaded groove.

[0011] According to the aerostatic bearing for an aerostatic centrifugal chiller described above, the vent hole is fitted and communicated with the middle of the sealing cover.

[0012] According to the aerostatic bearing for an aerostatic centrifugal chiller described above, the current collector ring is hermetically and contact-connected to the inside of the bearing housing through the fixed contact connection inside the sealing cover. The current collector groove is a conical structure, and the current collector groove is fitted and communicated with the middle of the current collector ring.

[0013] The beneficial effects of the above solution are as follows: By setting the porous throttle ring, the support ring and the baffle ring, the porous throttle ring is used to accelerate the flow of the air pressure around the rotor, which can provide a uniform state during the establishment of the air film and prevent the uneven air pressure of the air film, resulting in contact and collision between the rotor and the inner wall of the aerostatic bearing housing, and avoiding damage to the rotor. Through the support ring, the contact area between the rotor and the inside of the porous throttle ring can be reduced. Then, by using the baffle ring, the rotor can be moved outward through the sealing plate.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0015] The present invention will be further described below in conjunction with the drawings and embodiments;

[0016] Figure 1 It is a schematic structural diagram of an aerostatic bearing for an aerostatic centrifugal chiller of the present invention;

[0017] Figure 2 It is a schematic structural diagram of an aerostatic bearing for an aerostatic centrifugal chiller of the present invention from another angle;

[0018] Figure 3 This is a side sectional view of the air floating bearing used in an air suspension centrifugal chiller of the present utility model.

[0019] Legend:

[0020] 1. Bearing housing; 2. Sealing cover; 3. Vent hole; 4. Sealing plate; 5. Rotor; 6. Sealing ring; 7. Sealing groove; 8. Threaded ring; 9. Threaded groove; 10. Air chamber; 11. Porous throttle ring; 12. Air film; 13. Support ring; 14. Flow separation ring; 15. Current collector ring; 16. Current collection groove. Specific embodiments

[0021] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0022] Refer to Figures 1-3 , an air floating bearing used in an air suspension centrifugal chiller according to an embodiment of the present utility model includes a bearing housing 1 and a sealing cover 2. A sealing plate 4 is provided on the inner side of one end of the bearing housing 1. A porous throttle ring 11 is provided on the inner side of the sealing plate 4. A support ring 13 is provided on the inner surface of the porous throttle ring 11. A rotor 5 is provided on the inner side of the support ring 13. An air chamber 10 is provided inside the bearing housing 1 and outside the porous throttle ring 11. An air film 12 is provided inside the porous throttle ring 11 and outside the rotor 5. A flow separation ring 14 is provided on one side inside the porous throttle ring 11. A sealing groove 7 and a threaded groove 9 are respectively provided on the peripheral surface of the other end of the bearing housing 1. A vent hole 3 is provided in the middle of the sealing cover 2. A sealing ring 6 and a threaded ring 8 are respectively provided on the peripheral surface of the inner side of the sealing cover 2. A current collector ring 15 is provided on the inner side of the sealing cover 2. A current collection groove 16 is provided in the middle of the current collector ring 15.

[0023] The bearing housing 1 is made of tungsten carbide alloy. The sealing plate 4 is fixedly welded to the inner side of one end of the bearing housing 1. The porous throttle ring 11 is fixedly in contact with the inner side of the sealing plate 4. The porous throttle ring 11 forms a supported and suspended effect inside the bearing housing 1 through the fixed connection on the inner side of the sealing plate 4. There are two support rings 13, and both of the two support rings 13 are fixedly in contact with the surfaces at both ends of the inner side of the porous throttle ring 11. The diameter of the rotor 5 is smaller than that of the support ring 13, and the rotor 5 is in contact with the inner side of the support ring 13. By providing the support ring 13, the contact area between the rotor 5 and the inside of the porous throttle ring 11 can be reduced. The space left inside the bearing housing 1 and outside the porous throttle ring 11 forms an air chamber 10, and the space left inside the porous throttle ring 11 and outside the rotor 5 forms an air film 12. The flow separation ring 14 is fixedly connected to one side inside the porous throttle ring 11. By providing the flow separation ring 14, the effect of sealing contact and movement of the air flow pressure on the rotor 5 towards the sealing plate 4 and the outside can be achieved. The sealing groove 7 and the threaded groove 9 are both fitted and recessed on the peripheral surface of the other end of the bearing housing 1. The sealing ring 6 and the threaded ring 8 are both fixedly in contact with the peripheral surface inside the sealing cover 2. The sealing cover 2 is in sealing contact with the outer surface of the bearing housing 1 through the threaded sealing connection between the threaded groove 9 and the threaded ring 8. The sealing ring 6 is made of rubber, and the sealing ring 6 is in contact with the inside of the sealing groove 7. The diameters of the sealing ring 6 and the sealing groove 7 are both larger than those of the threaded ring 8 and the threaded groove 9. The vent hole 3 is fitted and communicated with the middle of the sealing cover 2. The current collector ring 15 is in sealing contact with the inside of the bearing housing 1 through the fixed contact connection on the inner side of the sealing cover 2. The current collector groove 16 is of a conical structure, and the current collector groove 16 is fitted and communicated with the middle of the current collector ring 15.

[0024] Working principle: When the air floating bearing is working, compressed air or inert gas is injected into the bearing housing 1 through the vent hole 3 of the sealing cover 2 and through the current collector groove 16 inside the current collector ring 15, so as to form an air chamber 10 inside the bearing housing 1 and outside the porous throttle ring 11. The air flow pressure in the air chamber 10 enters the inside of the porous throttle ring 11 through the holes on the surface of the porous throttle ring 11, and forms an extremely thin air film 12 with the rotor 5, achieving the purpose of air floating the rotating shaft to rotate the rotor 5. Since the distance of the air flow pressure is much larger than the distance between solid molecules, the air film 12 can effectively isolate the direct contact between the bearing housing 1 and the rotor 5, thereby greatly reducing friction and wear.

[0025] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art to which the present invention pertains.

Claims

1. A gas-lubricated bearing for a gas-bearing centrifugal chiller, comprising: Bearing housing (1) and sealing cover (2), characterized in that a sealing plate (4) is provided inside one end of the bearing housing (1), a porous throttle ring (11) is provided inside the sealing plate (4), a support ring (13) is provided on the inner surface of the porous throttle ring (11), a rotor (5) is provided inside the support ring (13), an air chamber (10) is provided inside the bearing housing (1) and outside the porous throttle ring (11), an air film (12) is provided inside the porous throttle ring (11) and outside the rotor (5), a flow dividing ring (14) is provided on one side inside the porous throttle ring (11), a sealing groove (7) and a threaded groove (9) are respectively provided on the peripheral surface of the other end of the bearing housing (1), a ventilation hole (3) is provided in the middle of the sealing cover (2), a sealing ring (6) and a threaded ring (8) are respectively provided on the inner peripheral surface of the sealing cover (2), a current collecting ring (15) is provided inside the sealing cover (2), and a current collecting groove (16) is provided in the middle of the current collecting ring (15).

2. The air floating bearing for an air suspension centrifugal chiller according to claim 1, wherein The bearing housing (1) is made of tungsten cobalt alloy, the sealing plate (4) is fixedly welded to the inner side of one end of the bearing housing (1), the porous throttle ring (11) is fixedly in contact with the inner side of the sealing plate (4), and the porous throttle ring (11) forms a supported and suspended effect with the inside of the bearing housing (1) through fixed connection on the inner side of the sealing plate (4).

3. The air floating bearing for an air suspension centrifugal chiller according to claim 1, characterized in that, There are two support rings (13), both of the two support rings (13) are fixedly in contact with the two end surfaces on the inner side of the porous throttle ring (11), the diameter of the rotor (5) is smaller than the diameter of the support ring (13), and the rotor (5) is in contact with the inner side of the support ring (13).

4. The air floating bearing for an air suspension centrifugal chiller according to claim 1, wherein, The space left inside the bearing housing (1) and outside the porous throttle ring (11) forms an air chamber (10), and the space left inside the porous throttle ring (11) and outside the rotor (5) forms an air film (12).

5. The air floating bearing for an air suspension centrifugal chiller according to claim 1, wherein The flow dividing ring (14) is fixedly connected to one side inside the porous throttle ring (11).

6. The air floating bearing for an air suspension centrifugal chiller according to claim 1, wherein Both the sealing groove (7) and the threaded groove (9) are in interference recessed connection with the peripheral surface of the other end of the bearing housing (1), both the sealing ring (6) and the threaded ring (8) are fixedly in contact with the inner peripheral surface of the sealing cover (2), the sealing cover (2) is in sealing contact connection with the outer surface of the bearing housing (1) through threaded sealing connection between the threaded groove (9) and the threaded ring (8), the sealing ring (6) is made of rubber, the sealing ring (6) is in contact with the inside of the sealing groove (7), and the diameters of both the sealing ring (6) and the sealing groove (7) are larger than those of the threaded ring (8) and the threaded groove (9).

7. A gas-lubricated bearing for a gas-bearing centrifugal chiller according to claim 1, wherein, The ventilation hole (3) is in interference communication connection with the middle of the sealing cover (2).

8. The air floating bearing for an air suspension centrifugal chiller according to claim 1, characterized in that The current collecting ring (15) is in sealing contact connection with the inside of the bearing housing (1) through fixed contact connection on the inner side of the sealing cover (2), the current collecting groove (16) is a conical structure, and the current collecting groove (16) is in interference communication connection with the middle of the current collecting ring (15).

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