Spiral groove gas bearing adopting curved surface groove structure

Abstract

The utility model discloses a spiral groove gas bearing adopting a curved surface groove structure, and relates to the technical field of gas bearings, the spiral groove gas bearing comprises a bearing body, the outer wall of the bearing body is uniformly provided with a plurality of V-shaped grooves, the V-shaped grooves are uniformly distributed at the center of the outer wall of the bearing body, and the outer edge of the bearing body is rotatably connected with a bearing sleeve; when the bearing body is damaged and needs to be replaced, the limiting plate is broken apart towards the side away from the bearing sleeve, when the limiting plate drives the positioning pin to move towards the outside of the inserting groove, the limiting plate is taken down, and then the bearing body can be replaced. According to the quick and convenient maintenance device, the bearing body can be quickly replaced under the condition that special tools are not needed or excessive disassembly work is not needed through mutual cooperation of the positioning ball, the positioning spring and the positioning pin, the maintenance time is greatly saved, and the potential shutdown cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas bearings, in particular to a spiral groove gas bearing adopting a curved groove structure. Background Art

[0002] With the global green and low-carbon transformation, hydrogen fuel cell vehicles, as the key direction of clean energy vehicles, have the advantages of high energy density, zero emissions, low operating noise, fast refueling speed, energy saving and environmental protection, and have great development potential and prospects in the future. As the "lungs" of hydrogen fuel cells, air compressors are required to be oil-free, small in size, light in weight, high in speed, good in reliability and fast in response, which puts higher requirements on bearings as key supporting components. Compared with traditional bearings, spiral groove gas bearings have excellent characteristics such as small size, high in speed and high in stability.

[0003] In the existing gas bearings, when the inner ring of the bearing rotates at high speed, the gas inside the bearing will move violently under long-term high-speed rotation, so the inner ring and outer ring of the bearing will become loose or move, affecting the bearing capacity during operation. In view of this, we provide a spiral groove gas bearing with a curved groove structure. Summary of the invention

[0004] The utility model aims to make up for the deficiencies of the prior art and provides a spiral groove gas bearing adopting a curved groove structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a spiral groove gas bearing with a curved groove structure, including a bearing body, the outer wall of the bearing body is provided with a plurality of V-grooves, and the V-grooves are evenly distributed at the center of the outer wall of the bearing body, a bearing sleeve is rotatably connected at the outer edge of the bearing body, and a limiting plate is fixedly connected to one side of the outer wall of the bearing sleeve.

[0006] As mentioned above, the deepest part of the V-shaped groove is h1 μm, and the shallowest part of the V-shaped groove is flush with the outer wall of the bearing body.

[0007] As mentioned above, a plurality of air inlet holes are provided at the edge of the outer wall of the bearing sleeve, and the air inlet holes are located at the outer edge of the bearing body.

[0008] As mentioned above, the bearing body is located at the inner center of the bearing sleeve, and the bearing body is rotatably connected to the inner center of the bearing sleeve.

[0009] As mentioned above, the center of the outer wall of the bearing body is connected through the outer wall of one side of the bearing sleeve, and the air inlet hole and the V-shaped groove correspond to each other.

[0010] As mentioned above, the outer wall of one side of the bearing body and the outer wall of one side of the limiting plate are in contact with each other, and the bearing body is located at the inner center of the limiting plate.

[0011] As mentioned above, the center of the outer wall of the bearing body is connected through the center of the outer wall of the limiting plate, and the center of the outer wall of the bearing body is connected to the inner center of the limiting plate in rotation.

[0012] As mentioned above, a plurality of positioning pins are fixedly connected to one side of the outer wall of the limit plate close to the bearing sleeve, and a plurality of slots are opened on one side of the inner wall of the bearing sleeve.

[0013] As mentioned above, a plurality of corresponding positioning springs are fixedly connected to both ends of the interior of the slot, and a positioning ball is fixedly connected to the outer wall of one end corresponding to the positioning spring.

[0014] As mentioned above, one end of the outer wall of the positioning pin is connected to the center of the slot, and one side of the outer wall of the positioning pin is slidably connected to the two sides of the slot, the positioning ball and one side of the inner part of the positioning pin are in contact and fit with each other, and the positioning balls are located on both sides of the inner part of the positioning pin.

[0015] Compared with the prior art, the spiral groove gas bearing adopting the curved groove structure has the following beneficial effects:

[0016] 1. The utility model utilizes the specific geometric structure formed by the V-grooves on the outer wall of the bearing body to generate a pressure field. When the gas enters the interior of the bearing sleeve through the air inlet hole, it is guided into these V-grooves. Since the V-grooves are arranged between the bearing sleeve and the bearing body, the gas forms a high-pressure area between the bearing body and the bearing sleeve, which can generate an air cushion, so that the bearing body and the bearing sleeve can achieve non-contact, extremely low-friction rotational motion, so that the device remains stable during high-speed rotation. At the same time, the combination of the locating pins and locating balls on the bearing sleeve, in conjunction with the locating spring, ensures the precise positioning and stability of the device in the axial and radial directions. In addition, the limit plate provides additional support and restriction for the entire structure to prevent excessive movement or vibration of the bearing, further improving the bearing's bearing capacity.

[0017] 2. According to the utility model, when the bearing body is damaged and needs to be replaced, the limit plate is pried apart to the side away from the bearing sleeve, and a locating pin fixed on one side of the outer wall thereof is used, and the arc-shaped grooves on both sides of the inner side of the locating pin are utilized. When the limit plate drives the locating pin to move outside the slot, the locating pin pushes the locating ball to both ends inside the slot, so that the locating ball compresses the locating spring, and the locating ball is separated from the arc-shaped concave surface on one side of the inner side of the locating pin. At this time, the limit plate is removed and the bearing body can be replaced, thereby realizing fast and easy maintenance operations. Through the mutual cooperation between the locating ball, the locating spring and the locating pin, the device allows the bearing body to be quickly replaced without the need for special tools or excessive disassembly work, thereby greatly saving maintenance time and reducing potential downtime costs.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a side sectional three-dimensional structural schematic diagram of the bearing sleeve of the utility model;

[0021] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the bearing sleeve of the utility model;

[0022] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the limit plate and the bearing sleeve of the utility model;

[0023] Figure 5 For this utility model Figure 4 Schematic diagram of the local three-dimensional structure of A.

[0024] In the figure: 1, bearing body; 2, V-shaped groove; 3, bearing sleeve; 301, air inlet hole; 4, limit plate; 401, positioning pin; 402, slot; 403, positioning spring; 404, positioning ball. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-5 As shown, the utility model provides a technical solution for a spiral groove gas bearing adopting a curved groove structure: a spiral groove gas bearing adopting a curved groove structure, comprising a bearing body 1, a plurality of V-shaped grooves 2 are opened on the outer wall of the bearing body 1, and the V-shaped grooves 2 are evenly distributed at the center of the outer wall of the bearing body 1, a bearing sleeve 3 is rotatably connected at the outer edge of the bearing body 1, and a limiting plate 4 is fixedly connected to one side of the outer wall of the bearing sleeve 3.

[0027] The specific geometric structure formed by the V-groove 2 on the outer wall of the bearing body 1 is used to generate a pressure field. When the gas enters the bearing sleeve 3 through the air inlet 301, it is guided into these V-grooves 2. Since the V-groove 2 is set between the bearing sleeve 3 and the bearing body 1, the gas forms a high-pressure area between the bearing body 1 and the bearing sleeve 3, and an air cushion can be generated, so that non-contact and extremely low-friction rotational motion can be achieved between the bearing body 1 and the bearing sleeve 3, which can keep the device stable during high-speed rotation, reduce wear and extend the service life. At the same time, the combination of the locating pin 401 and the locating ball 404 on the bearing sleeve 3, together with the locating spring 403, ensures the precise positioning and stability of the device in the axial and radial directions. In addition, the limit plate 4 provides additional support and restriction for the entire structure to prevent excessive movement or vibration, and in the event of damage to the bearing body 1 When the bearing body 1 is damaged and needs to be replaced, the limit plate 4 is pried apart to the side away from the bearing sleeve 3, and the positioning pin 401 fixed on one side of its outer wall is used. By using the arc-shaped grooves on both sides of the positioning pin 401, when the limit plate 4 drives the positioning pin 401 to move outside the slot 402, the positioning pin 401 pushes the positioning ball 404 to both ends inside the slot 402, so that the positioning ball 404 compresses the positioning spring 403, and the positioning ball 404 is separated from the arc-shaped concave surface on one side of the positioning pin 401. At this time, the limit plate 4 is removed and the bearing body 1 can be replaced, thereby realizing fast and easy maintenance operations. Through the mutual cooperation between the positioning ball 404, the positioning spring 403 and the positioning pin 401, the device allows the bearing body 1 to be quickly replaced without the need for special tools or excessive disassembly work, which greatly saves maintenance time and reduces potential downtime costs.

[0028] like Figure 1-3 As shown, the deepest part of the V-groove 2 is h1μm, and the shallowest part of the V-groove 2 is flush with the outer wall of the bearing body 1. A plurality of air inlet holes 301 are provided at the edge of the outer wall of the bearing sleeve 3, and the air inlet holes 301 are located at the outer edge of the bearing body 1. The bearing body 1 is located at the inner center of the bearing sleeve 3, and the bearing body 1 is rotatably connected to the inner center of the bearing sleeve 3. The outer wall center of the bearing body 1 is connected through the outer wall of one side of the bearing sleeve 3, and the air inlet holes 301 correspond to the V-groove 2.

[0029] The specific geometric structure formed by the V-groove 2 on the outer wall of the bearing body 1 is used to generate a pressure field. When the gas enters the bearing sleeve 3 through the air inlet 301, it is guided into these V-grooves 2. Since the V-groove 2 is arranged between the bearing sleeve 3 and the bearing body 1, the gas forms a high-pressure area between the bearing body 1 and the bearing sleeve 3, and an air cushion can be generated, so that non-contact and extremely low-friction rotational motion can be achieved between the bearing body 1 and the bearing sleeve 3, so that the device can remain stable during high-speed rotation, reduce wear and extend the service life. At the same time, the combination of the locating pin 401 and the locating ball 404 on the bearing sleeve 3, together with the locating spring 403, ensures the precise positioning and stability of the device in the axial and radial directions. In addition, the limit plate 4 provides additional support and restriction for the entire structure to prevent excessive movement or vibration, thereby ensuring the high precision and reliability of the device during operation, thereby making the device suitable for mechanical applications requiring high-speed rotation and precise positioning.

[0030] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the outer wall of one side of the bearing body 1 and the outer wall of one side of the limit plate 4 fit each other, and the bearing body 1 is located at the inner center of the limit plate 4, the outer wall center of the bearing body 1 is connected through and through with the outer wall center of the limit plate 4, and the outer wall center of the bearing body 1 is rotatably connected with the inner center of the limit plate 4, and a plurality of positioning pins 401 are fixedly connected to the outer wall of the limit plate 4 close to the bearing sleeve 3, and a plurality of slots 402 are opened on one side of the inner part of the bearing sleeve 3, and a plurality of corresponding positioning springs 403 are fixedly connected to both ends of the slots 402, and a positioning ball 404 is fixedly connected to the outer wall of the corresponding end of the positioning spring 403, one end of the outer wall of the positioning pin 401 is connected through and through with the inner center of the slot 402, and one side of the outer wall of the positioning pin 401 is slidably connected with the two sides of the inner part of the slot 402, the positioning balls 404 and the inner side of the positioning pin 401 are mutually in conflict and fit, and the positioning balls 404 are located on both sides of the inner part of the positioning pin 401.

[0031] When the bearing body 1 is damaged and needs to be replaced, the limit plate 4 is pried apart to the side away from the bearing sleeve 3, and the positioning pin 401 fixed on one side of its outer wall is used. By using the arc-shaped grooves on both sides of the positioning pin 401, when the limit plate 4 drives the positioning pin 401 to move outside the slot 402, the positioning pin 401 pushes the positioning ball 404 to both ends inside the slot 402, so that the positioning ball 404 compresses the positioning spring 403, and the positioning ball 404 is separated from the arc-shaped concave surface on one side of the positioning pin 401. At this time, the limit plate 4 is removed and the bearing body 1 can be replaced, thereby realizing quick and easy maintenance operations. Through the mutual cooperation between the positioning ball 404, the positioning spring 403 and the positioning pin 401, the device allows the bearing body 1 to be quickly replaced without the need for special tools or excessive disassembly work, which greatly saves maintenance time and reduces potential downtime costs.

[0032] Working principle: The specific geometric structure formed by the V-groove 2 on the outer wall of the bearing body 1 is used to generate a pressure field. When the gas enters the bearing sleeve 3 through the air inlet 301, it is guided into these V-grooves 2. Since the V-groove 2 is set between the bearing sleeve 3 and the bearing body 1, the gas forms a high-pressure area between the bearing body 1 and the bearing sleeve 3, which can generate an air cushion, so that the bearing body 1 and the bearing sleeve 3 can achieve non-contact, extremely low-friction rotational motion, which can keep the device stable during high-speed rotation, reduce wear and extend the service life. At the same time, the combination of the positioning pin 401 and the positioning ball 404 on the bearing sleeve 3, together with the positioning spring 403, ensures the precise positioning and stability of the device in the axial and radial directions. In addition, the limit plate 4 provides additional support and restriction for the entire structure to prevent excessive movement. Or vibration, when the bearing body 1 is damaged and needs to be replaced, the limit plate 4 is pried apart to the side away from the bearing sleeve 3, and the positioning pin 401 fixed on one side of its outer wall is used. By using the arc-shaped grooves on both sides of the positioning pin 401, when the limit plate 4 drives the positioning pin 401 to move outside the slot 402, the positioning pin 401 pushes the positioning ball 404 to both ends of the slot 402, so that the positioning ball 404 compresses the positioning spring 403, and the positioning ball 404 is separated from the arc-shaped concave surface on one side of the positioning pin 401. At this time, the limit plate 4 is removed and the bearing body 1 can be replaced, thereby realizing fast and easy maintenance operations, and the mutual cooperation between the positioning ball 404, the positioning spring 403 and the positioning pin 401 allows the device to quickly replace the bearing body 1 without the need for special tools or excessive disassembly work.

[0033] It should be noted that, in this article, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected", and "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or a connection between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral groove gas bearing with a curved groove structure, comprising a bearing body (1), characterized in that: The outer wall of the bearing body (1) is provided with a plurality of V-shaped grooves (2), and the V-shaped grooves (2) are evenly distributed at the center of the outer wall of the bearing body (1); a bearing sleeve (3) is rotatably connected to the outer edge of the bearing body (1), and a limiting plate (4) is fixedly connected to one side of the outer wall of the bearing sleeve (3).

2. The spiral groove gas bearing with a curved groove structure according to claim 1, characterized in that: The deepest part of the V-shaped groove (2) is h1 μm, and the shallowest part of the V-shaped groove (2) is flush with the outer wall of the bearing body (1).

3. The spiral groove gas bearing with a curved groove structure according to claim 2, characterized in that: A plurality of air inlet holes (301) are provided at the edge of the outer wall of the bearing sleeve (3), and the air inlet holes (301) are located at the outer edge of the bearing body (1).

4. The spiral groove gas bearing with a curved groove structure according to claim 3, characterized in that: The bearing body (1) is located at the inner center of the bearing sleeve (3), and the bearing body (1) is rotatably connected to the inner center of the bearing sleeve (3).

5. The spiral groove gas bearing with a curved groove structure according to claim 3, characterized in that: The center of the outer wall of the bearing body (1) is connected through the outer wall of one side of the bearing sleeve (3), and the air inlet hole (301) corresponds to the V-shaped groove (2).

6. The spiral groove gas bearing with a curved groove structure according to claim 5, characterized in that: The outer wall of one side of the bearing body (1) and the outer wall of one side of the limiting plate (4) are in contact with each other, and the bearing body (1) is located at the center inside the limiting plate (4).

7. The spiral groove gas bearing with a curved groove structure according to claim 6, characterized in that: The center of the outer wall of the bearing body (1) is connected through the center of the outer wall of the limiting plate (4), and the center of the outer wall of the bearing body (1) is connected to the inner center of the limiting plate (4) in a rotatable manner.

8. The spiral groove gas bearing with a curved groove structure according to claim 6, characterized in that: A plurality of positioning pins (401) are fixedly connected to the outer wall of the limiting plate (4) on one side close to the bearing sleeve (3), and a plurality of slots (402) are provided on the inner side of the bearing sleeve (3).

9. The spiral groove gas bearing with a curved groove structure according to claim 8, characterized in that: A plurality of corresponding positioning springs (403) are fixedly connected to both ends of the slot (402), and a positioning ball (404) is fixedly connected to the outer wall of one end corresponding to the positioning spring (403).

10. The spiral groove gas bearing with a curved groove structure according to claim 9, characterized in that: One end of the outer wall of the positioning pin (401) is connected to the center of the slot (402), and one side of the outer wall of the positioning pin (401) is slidably connected to the two sides of the slot (402). The positioning ball (404) and one side of the interior of the positioning pin (401) are in contact with and fit against each other, and the positioning ball (404) is located on both sides of the interior of the positioning pin (401).

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