Bidirectional air bearing device

Abstract

The utility model discloses and provides a two-way air bearing device, including rotor, base and intake assembly, the middle part of base is provided with the cavity that is used for holding rotor, intake assembly is fixed connection in the bottom of base, the side face of base is provided with first air passage, the first air passage is communicated with the cavity, and the first air passage is communicated with the cavity. A cavity is formed in the base, a second air inlet hole is formed in the bottom of the base and connected with the cavity in a penetrating mode, a second air channel is formed in the air inlet assembly and connected with the second air inlet hole in a penetrating mode, and a flange is fixedly connected to the top end of the rotor. According to the air bearing, the independent rotor design is adopted, the mechanical assembly precision of the independent rotor and the base is guaranteed, the air bearing can be well matched with different roller passing structures by being matched with the flange structure, the convenience of the air bearing for the roller structure is greatly improved, and large-scale industrialization is better facilitated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air bearings, and in particular to a two-way air bearing device. Background Art

[0002] Rollers are often needed in the textile and coating industries. The pull of the fabric or substrate will drive the roller to rotate, so bearings are needed at both ends of the roller to transmit the motion. Traditional rollers generally use mechanical bearings, which have problems of static friction and dynamic friction. In some cases, the rotational friction provided by the fabric or substrate is less than the friction of the bearings at both ends of the roller, so the roller will slip and affect the product quality.

[0003] Advanced rollers will use the structure of air bearings, such as patent number CN202222750158.3, an air-floating follow-up roller, and patent number CN202321062006.2, an adaptive air bearing device and an air roller equipped with the adaptive air bearing device. Both of the above patents use two independent thrust and radial air bearings to transmit motion. There is a common problem as described below. The air bearing has a micron-thick air film between the bearing gaps. This air film supports the load between the shaft and the bearing through the static pressure or dynamic pressure of the gas, avoiding direct contact. It is precisely because the thickness of the air film is very small that this puts very stringent requirements on the cylindricity of the rotor. If the structure in the above patent is adopted, the cylindricity and coaxiality of the cylinders at both ends of the roller must be very high, so as to ensure that the air film gap will not be partially closed during rotation. If the diameters of the two ends of the roller are large, the processing requirements are too stringent and not conducive to industrialization. Utility Model Content

[0004] The present disclosure provides a two-way air bearing device to solve the problems existing in the above patents.

[0005] The present invention provides a two-way air-floating bearing device, including a rotor, a base and an air intake assembly, wherein a cavity for accommodating the rotor is provided in the middle of the base, the air intake assembly is fixedly connected to the bottom of the base, a first air duct is provided on the side of the base, the first air duct is connected to the cavity, a second air inlet hole is provided at the bottom of the base, the second air inlet hole is connected to the cavity, a second air duct is provided in the air intake assembly, the second air duct is connected to the second air inlet hole, and a flange is fixedly connected to the top of the rotor.

[0006] Preferably, the first air duct includes a first air inlet duct and a first air inlet hole, one end of the first air inlet duct is arranged to pass through the outer side of the base, the other end of the first air inlet duct is connected to one end of the first air inlet hole, and the other end of the first air inlet hole is connected to the cavity.

[0007] Preferably, the number of the first air inlet ducts is 8, the 8 first air inlet ducts are distributed in two rows, and the 4 first air inlet ducts in the same row are equidistantly distributed on the base, and 4 vertical air ducts are opened inside the base, and the vertical air ducts connect two of the first air inlet ducts.

[0008] Preferably, an annular air channel is provided at the top of the base, and the vertical air channel passes through the top of the base and is connected to the annular air channel.

[0009] Preferably, the top end cover of the annular airway is provided with an air sealing ring, and the air sealing ring is fixedly connected to the base.

[0010] Preferably, one end of the first air inlet hole close to the cavity is connected to a first throttling hole, and the first throttling hole is in communication with the cavity.

[0011] Preferably, two first grooves distributed vertically are formed on the inner side of the base, and the first throttling hole is connected to the first grooves.

[0012] Preferably, the second air duct includes two staggered second air inlet ducts, a plurality of air outlet holes are opened at the top of the second air inlet duct, the number of the second air inlet holes is the same as the number of the air outlet holes and corresponds one to one, and the second air inlet holes are through-connected with the air outlet holes.

[0013] Preferably, one end of the second air inlet hole close to the cavity is connected to a second throttling hole, and the second throttling hole is in communication with the cavity.

[0014] Preferably, two second grooves are formed at the bottom of the inner side of the base, and the second throttling hole is connected to the second grooves.

[0015] The beneficial effects of the present disclosure are mainly as follows: the utility model adopts an independent rotor design to ensure the mechanical assembly accuracy of the independent rotor and the base, and with the flange structure, it can be well adapted to different roller structures, greatly improving the convenience of using air bearings for roller structures, and is more conducive to large-scale industrialization.

[0016] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the bearing device according to an embodiment of the present disclosure;

[0019] Figure 2 is a schematic cross-sectional structure diagram of a bearing device according to an embodiment of the present disclosure;

[0020] Figure 3 A top view of a base according to an embodiment of the present disclosure;

[0021] Figure 4 For the embodiments of the present disclosure Figure 3 Cross-sectional view in the middle BB direction;

[0022] Figure 5 is a perspective view of an air intake assembly according to an embodiment of the present disclosure;

[0023] Icons: 1-rotor; 2-base; 21-first air inlet; 22-first air inlet hole; 23-first throttle hole; 24-vertical air duct; 25-annular air duct; 26-first groove; 3-inlet assembly; 31-second air inlet; 32-air outlet hole; 33-second air inlet hole; 34-second throttle hole; 35-second groove; 4-flange; 5-tightening screw; 6-sealing ring. DETAILED DESCRIPTION

[0024] The technical solution of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0025] Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present disclosure.

[0026] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying 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 of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0028] Example

[0029] like Figure 1-5 As shown, this embodiment provides a two-way air bearing device, including a rotor 1, a base 2 and an air intake assembly 3. A cavity for accommodating the rotor 1 is provided in the middle of the base 2, and the rotor 1 can be suspended in the cavity. The air intake assembly 3 is fixedly installed at the bottom of the base 2 by bolts. A first air channel is provided on the side of the base 2, and the first air channel is connected to the cavity. The first air channel is used to provide a suspension force to the side of the rotor 1, so that the side of the rotor 1 is suspended. A second air intake hole 33 is provided at the bottom of the base 2, and the second air intake hole 33 is connected to the cavity. The air intake assembly 3 is provided with a second air channel, and the second air channel is connected to the second air intake hole 33. The bottom air channel finally provides an upward suspension force for the rotor 1, so that the rotor 1 is suspended in the vertical direction. A threaded hole is provided at the top of the rotor 1, and the rotor 1 is fixedly connected to a flange 4 by a clamping screw 5. Different flange 4 structures can be well adapted to different roller structures.

[0030] Specifically, the first air channel includes a first air inlet channel 21 and a first air inlet hole 22. One end of the first air inlet channel 21 passes through the side wall of the base 2 and is connected to the outside. The gas is input through the air pipe connected to the first air inlet channel 21. The other end of the first air inlet channel 21 is connected to the first air inlet hole 22. The first air inlet hole 22 is connected to a first throttle hole 23 at one end close to the cavity. The first throttle hole 23 is connected to the cavity. The first throttle hole 23 is a small hole with a diameter of 100 microns, which is used to improve the air flotation stiffness.

[0031] Among them, the number of the first air inlet ducts 21 is 8, and the number of the corresponding first air inlet holes 22 and the first throttle holes 23 is also 8. The shape of the base 2 is a cylindrical structure. The 8 first air inlet ducts 21 are distributed in two rows, and the four first air inlet ducts 21 in the same row are arranged at 90 degrees apart from each other, so that the 8 first air inlet ducts 21 are evenly distributed on the side of the base 2. Four vertical air ducts 24 are opened inside the base 2. The vertical air ducts 24 are arranged to penetrate the two first air inlet ducts 21 in the same column, so that the upper and lower first air inlet ducts 21 are interconnected.

[0032] Furthermore, an annular airway 25 is provided at the top of the base 2, the vertical airway 24 is arranged through the top of the base 2 and is connected to the annular airway 25, and the top cover of the annular airway 25 is provided with an air sealing ring 6, and the air sealing ring 6 is fixedly connected to the base 2 by screws. The vertical airway 24 is used to connect the upper and lower corresponding first air inlets 21, and the annular airway 25 is used to connect all the first air inlets 21, so as to realize the full connection of the side airways. When in use, only one of the first air inlets 21 needs to be connected to the blowing device, and the other first air inlets 21 are sealed by the top screw to prevent air leakage.

[0033] Furthermore, two first grooves 26 distributed vertically are opened on the inner side of the base 2, and the first throttling holes 23 located in the same row are connected to one of the first grooves 26. In this embodiment, the depth of the first groove 26 is about 30 microns. The first groove 26 is used to increase the area of ​​high-pressure gas, thereby improving the side air flotation bearing capacity.

[0034] Specifically, the second air passage includes two staggered second air inlet passages 31, the two second air inlet passages 31 are staggered in a cross shape, the two ends of the two second air inlet passages 31 respectively penetrate the air inlet assembly 3, and the top of the second air inlet passage 31 is provided with a plurality of air outlet holes 32. In this embodiment, the number of the air outlet holes 32 is five, one of which is located at the intersection of the two second air inlet passages 31, and the other four are arranged around the center point and are arranged at the same distance from the center point. The number of the second air inlet holes 33 is the same as the number of the air outlet holes 32 and corresponds one to one, and the second air inlet holes 33 are connected to the air outlet holes 32. The air inlet device is connected through one end of one of the second air inlet passages 31, and the other openings are sealed by top screws. Air is supplied through one end of one of the second air inlet passages 31, so that all the second air inlet holes 33 can be inlet.

[0035] Furthermore, one end of the second air inlet 33 close to the cavity is connected to a second throttle hole 34, and the second throttle hole 34 is in communication with the cavity. The second throttle hole 34 is a hole with a diameter of about 100 microns, and the gas blown out of the second throttle hole 34 blows toward the bottom of the rotor 1, so that the rotor 1 can be suspended in the vertical direction.

[0036] Furthermore, two second grooves 35 are provided at the bottom of the inner side of the base 2, and the second throttle hole 34 is connected to the second groove 35. The second groove 35 is used to increase the area of ​​the high-pressure gas, thereby improving the air-floating bearing capacity of the bottom surface.

[0037] Working principle of the utility model: The utility model connects the air intake device through one of the first air intake channels 21, and the other first air intake channels 21 are sealed by top screws. Similarly, the second air intake channels 31 on the air intake assembly 3 are the same, one of which is connected to the air intake device, and the other openings are sealed by top screws. The gas enters from the first air intake channel 21, passes through the vertical air channel 24 and the annular air channel 25, flows to all the first air intake holes 22, and finally blows out from the first throttle hole 23, so that the side of the rotor 1 is suspended; similarly, the gas enters from the second air intake channel 31, passes through the air outlet hole 32 and the second air intake hole 33, and finally blows out from the second throttle hole 34, so that the bottom of the rotor 1 is suspended. The top of the rotor 1 is fixedly installed by the clamping screw 5 and the flange 4, and different rollers are adapted by flanges 4 of different specifications.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A two-way air bearing device, characterized in that: It includes a rotor, a base and an air intake assembly, a cavity for accommodating the rotor is opened in the middle of the base, the air intake assembly is fixedly connected to the bottom of the base, a first air duct is opened on the side of the base, the first air duct is connected through the cavity, a second air inlet hole is opened at the bottom of the base, the second air inlet hole is connected through the cavity, a second air duct is opened in the air intake assembly, the second air duct is connected through the second air inlet hole, and a flange is fixedly connected to the top of the rotor.

2. A two-way air bearing device according to claim 1, characterized in that: The first air channel includes a first air inlet channel and a first air inlet hole, one end of the first air inlet channel is connected to the outer side of the base, the other end of the first air inlet channel is connected to one end of the first air inlet hole, and the other end of the first air inlet hole is connected to the cavity.

3. A two-way air bearing device according to claim 2, characterized in that: There are eight first air inlet ducts, which are distributed in two rows, and four first air inlet ducts in the same row are equidistantly distributed on the base. Four vertical air ducts are opened inside the base, and the vertical air ducts connect two of the first air inlet ducts.

4. A two-way air bearing device according to claim 3, characterized in that: An annular air channel is provided at the top of the base, and the vertical air channel is connected to the annular air channel at the top of the base.

5. A two-way air bearing device according to claim 4, characterized in that: The top end cover of the annular airway is provided with an air sealing ring, and the air sealing ring is fixedly connected to the base.

6. A two-way air bearing device according to claim 4, characterized in that: One end of the first air inlet hole close to the cavity is connected with a first throttling hole, and the first throttling hole is communicated with the cavity.

7. A two-way air bearing device according to claim 6, characterized in that: Two first grooves distributed up and down are formed on the inner side of the base, and the first throttle hole is connected with the first groove.

8. A two-way air bearing device according to claim 1, characterized in that: The second air duct includes two second air inlet ducts arranged alternately, a plurality of air outlet holes are opened at the top of the second air inlet duct, the number of the second air inlet holes is the same as the number of the air outlet holes and corresponds one to one, and the second air inlet holes are connected with the air outlet holes.

9. A two-way air bearing device according to claim 8, characterized in that: One end of the second air inlet hole close to the cavity is connected with a second throttling hole, and the second throttling hole is connected with the cavity.

10. A two-way air bearing device according to claim 9, characterized in that: Two second grooves are formed at the bottom of the inner side of the base, and the second throttling hole is communicated with the second grooves.

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