Thrust dynamic and static pressure mixed gas bearing

Abstract

The invention provides a thrust hybrid gas bearing, and relates to the technical field of gas bearings. The bearing comprises a bearing base, a top foil support, a bump foil, a top foil and a high-pressure air supply assembly, the top foil support is movably connected with the bearing base, a gap is formed between the top foil support and the bearing base, the bump foil is connected to the bearing base, the top foil is sequentially provided with a first connecting part, a wedge-shaped part and a second connecting part in the circumferential direction, and the first connecting part is connected with the top foil support; the second connecting part is connected with the bump foil, the first connecting part is provided with a vent hole, the high-pressure air supply assembly is connected with the top foil support and communicated with the vent hole, relative displacement can be generated between the top foil support and the bearing base, and therefore the bearing has the adjusting capacity and can meet the use requirements under different working conditions. And the dynamic adjusting capacity is achieved, through cooperation of static pressure supporting and dynamic pressure supporting, the overall environment pressure of the bearing is improved, the dynamic pressure effect is enhanced, and the stability and the bearing capacity of an air film are improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas bearings, in particular to a thrust dynamic and static pressure mixed gas bearing. Background Art

[0002] Gas foil bearing is a kind of dynamic pressure gas bearing. It is widely used in turbomachinery such as air compressors, air cycle machines, micro gas turbines, etc. due to its high temperature resistance, high speed, oil-free lubrication, and low friction loss. Gas foil bearing uses the wedge effect. As the speed of the supporting rotor increases, the gas with a certain viscosity in the surrounding environment is dragged into the wedge-shaped air cavity formed by the rotor and the bearing support surface by the high-speed rotating rotor. When the speed of the rotor rises to a certain level, the gas pressure in the wedge-shaped supporting air cavity increases and supports the rotor.

[0003] Currently, the most common and widely used is the corrugated foil type air foil bearing, which has good stiffness and damping characteristics. Usually, the corrugated foil type air foil bearing includes three layers: top foil, corrugated foil and supporting base plate. The top foil and corrugated foil are formed by stamping and fixed on the supporting base plate by welding in turn.

[0004] The applicant has discovered that there are at least the following technical problems in the prior art: when faced with complex and heavy-load working conditions, the load-bearing capacity of the existing bearings is relatively weak, and it is easy to break through the air film and cause mechanical failures. In addition, the existing top foil is welded to the supporting bottom plate, resulting in poor adjustment ability and lack of dynamic adjustment capability. When the working conditions are in dynamic changes, it cannot meet the use requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a thrust dynamic and static pressure mixed gas bearing to solve the technical problems existing in the prior art. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions: A thrust dynamic and static pressure mixed gas bearing comprises a bearing base, a top foil support, a corrugated foil, a top foil and a high-pressure gas supply assembly, wherein the top foil support is movably connected to the bearing base and a gap is formed therebetween, the corrugated foil is connected to the bearing base, the top foil is provided with a first connecting portion, a wedge-shaped portion and a second connecting portion in sequence along the circumferential direction, the first connecting portion is connected to the top foil support, the second connecting portion is connected to the corrugated foil, a vent is provided on the first connecting portion, the high-pressure gas supply assembly is connected to the top foil support and communicates with the vent, the high-pressure gas supply assembly can output high-pressure gas vertically upward through the vent, and cause relative displacement between the top foil support and the bearing base.

[0007] Preferably, the top foil is in a fan-shaped shape, a plurality of the top foils are evenly distributed along the circumferential direction, and the bottom of each top foil corresponds to one of the high-pressure air supply components.

[0008] Preferably, the shape of the corrugated foil is a fan ring, a plurality of the corrugated foils are evenly distributed along the circumferential direction, and each of the corrugated foils is connected to a corresponding top foil.

[0009] Preferably, a plurality of bosses are circumferentially arranged on the top of the bearing base, a corrugated foil is connected to the top of each boss, and a plurality of grooves are circumferentially opened on the bearing base, each of the grooves can accommodate a corresponding high-pressure air supply assembly.

[0010] Preferably, the first connecting portion is integrally connected or fixedly connected to the top foil support.

[0011] Preferably, the high-pressure air supply assembly comprises a pneumatic joint, which is connected to the first connecting portion and communicated with the air vent, and the other end of the pneumatic joint is communicated with an external air supply device.

[0012] Preferably, it also includes a cooling channel, which is arranged inside the bearing base. A water inlet hole and a water outlet hole are opened on the side of the bearing base, and both ends of the cooling channel are respectively connected to the water inlet hole and the water outlet hole.

[0013] Preferably, the water inlet hole is arranged adjacent to the water outlet hole, the cooling channel is arranged around the inside of the bearing base, and the cooling channel has several bending angle changes on the flow path.

[0014] Preferably, the top foil bracket is evenly provided with a plurality of first connecting holes along the circumference, and the bearing base is evenly provided with a plurality of second connecting holes along the circumference, the first connecting holes and the second connecting holes are the same in number and have corresponding positions, and each of the first connecting holes is movably connected with the corresponding second connecting hole by a plug screw.

[0015] Preferably, the bearing base is evenly provided with a plurality of third connection holes along the circumferential direction, and the third connection holes are connected to external equipment via connection bolts.

[0016] The beneficial effects of the present invention are as follows: when the thrust dynamic and static pressure mixed gas bearing is in an operating state, the rotor thrust plate rotates, and the high-pressure gas supply assembly is started. First, the high-pressure gas supply assembly can output high-pressure gas upward through the vent hole, and all high-pressure gas supply assemblies can cooperate together, and the high-pressure gas can form a static pressure support for the rotor thrust plate; While the high-pressure gas forms a static pressure support for the rotor thrust plate, due to the principle of force interaction, the vent hole can be subjected to a vertical downward reaction force, and the reaction force can drive the top foil bracket and the first connecting part of the top foil to move downward, so that a relative displacement occurs between the top foil bracket and the bearing base. In this process, due to the movable connection between the top foil bracket and the bearing base, no obstruction occurs. At the same time, the second connecting part maintains a certain degree of relative stillness and will not move downward significantly with the first connecting part. The downward moving first connecting part can drive the wedge-shaped part to deform, and a wedge-shaped interval for the high-pressure gas to enter is formed between the bearing and the rotor thrust plate, which can form a dynamic pressure support for the rotor thrust plate and improve the bearing capacity of the bearing.

[0017] If the gas pressure of the high-pressure gas changes, the strength of the reaction force will change accordingly, the relative position of the top foil bracket and the first connecting part will also be adjusted accordingly, and the deformation state of the wedge-shaped part will also be adjusted accordingly. However, it is precisely because the top foil bracket and the first connecting part have the ability to move that the thrust dynamic and static pressure mixed gas bearing has corresponding adjustment capabilities and can meet the use requirements under different working conditions. If the working conditions continue to change, the thrust dynamic and static pressure mixed gas bearing will have dynamic adjustment capabilities.

[0018] The thrust dynamic and static mixed gas bearing introduces high-pressure gas into the wedge-shaped area of ​​the bearing, which increases the overall environmental pressure of the bearing, enhances the dynamic pressure effect, and improves the stability and load-bearing capacity of the gas film. The thrust static and dynamic mixed gas bearing can use the static pressure support and the dynamic pressure support to cooperate with each other. The high-pressure gas of the static pressure support and the high-pressure gas of the dynamic pressure support are forced to form a height difference to ensure that the dynamic pressure always works normally.

[0019] Since the high-pressure gas in this embodiment is preferably a high-pressure and low-temperature gas, the high-pressure gas has a relatively low temperature. While being output, it can play a certain cooling role on the top foil, and is used to cool the heat generated by the working bearing and cool the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 A detailed structural diagram of the bearing base and the wave foil of the present invention; Figure 3It is a cross-sectional structural diagram of the cooling channel of the present invention; Figure 4 A top view of the top foil support and the top foil of the present invention; Figure 5 It is the exploded structure diagram of the present invention; In the figure, 1 is a bearing base; 11 is a boss; 12 is a groove; 13 is a second connecting hole; 14 is a third connecting hole; 15 is a water inlet hole; 16 is a water outlet hole; 2. Top foil support; 21. First connecting hole; 3. Wave foil; 4. top foil; 41. first connecting portion; 411. vent hole; 42. wedge-shaped portion; 43. second connecting portion; 5. High-pressure air supply assembly; 51. Pneumatic connector; 6. Cooling channel. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention 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 operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it is also necessary to explain 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] Reference Figures 1 to 5 The present invention provides a thrust dynamic and static pressure mixed gas bearing, comprising a bearing base 1, a top foil support 2, a wave foil 3, a top foil 4 and a high-pressure gas supply assembly 5; The bearing base 1 is the foundation of the thrust dynamic and static pressure mixed gas bearing and is connected to the external use equipment that needs to be fixed; The top foil support 2 is movably connected to the bearing base 1, and a gap can be formed between the top foil support 2 and the bearing base 1. The movably connected connection mode enables the top foil support 2 to move relative to the bearing base 1 in the vertical direction. The bump foil 3 is connected to the bearing base 1. The bump foil 3 can be deformed after being loaded. In addition to the deformation, the position of the bump foil 3 in the vertical direction can remain stationary relative to the bearing base 1. The top foil 4 is provided with a first connection portion 41, a wedge-shaped portion 42 and a second connection portion 43 in sequence along the circumferential direction. The top foil 4 is an integral structure. The first connection portion 41, the wedge-shaped portion 42 and the second connection portion 43 are equivalent to forming three different partitions. The first connection portion 41 is connected to the top foil support 2, the second connection portion 43 is connected to the corrugated foil 3, and the wedge-shaped portion 42 is located between the first connection portion 41 and the second connection portion 43. The first connecting portion 41 is provided with a vent hole 411, which is preferably arranged vertically. The high-pressure gas supply assembly 5 is connected to the top foil support 2 and communicates with the vent hole 411, and the high-pressure gas supply assembly 5 can output high-pressure gas vertically upward through the vent hole 411; The rotor thrust disk is located above the thrust dynamic and static pressure mixed gas bearing and can form a gap with the top foil support 2 and the top foil 4 .

[0025] The thrust dynamic and static pressure mixed gas bearing has an operating state and a non-operating state; When in a non-operating state, the rotor thrust plate does not rotate, the high-pressure air supply assembly 5 is not started, and no high-pressure gas is output upward through the vent hole 411. In this state, the top foil 4 is approximately planar as a whole, the wedge-shaped portion 42 will not be deformed under load, and a planar area will be formed between the rotor thrust plate and the thrust dynamic and static pressure mixed gas bearing, and no obvious wedge-shaped area will be formed.

[0026] When in operation, the rotor thrust plate rotates, and the high-pressure gas supply assembly 5 is started. First, the high-pressure gas supply assembly 5 can output high-pressure gas upward through the vent hole 411, and all high-pressure gas supply assemblies 5 can cooperate together, and the high-pressure gas can form static pressure support for the rotor thrust plate; While the high-pressure gas forms a static pressure support for the rotor thrust plate, due to the principle of force interaction, the vent hole 411 can be subjected to a vertical downward reaction force, and the reaction force can drive the top foil support 2 and the first connecting portion 41 of the top foil 4 to move downward, so that a relative displacement occurs between the top foil support 2 and the bearing base 1. In this process, since the top foil support 2 and the bearing base 1 are movably connected, no obstruction will occur. At the same time, the second connecting portion 43 maintains a certain degree of relative stillness and will not move downward significantly with the first connecting portion 41. The downward moving first connecting portion 41 can drive the wedge-shaped portion 42 to deform, and a wedge-shaped interval for the high-pressure gas to enter is formed between the bearing and the rotor thrust plate, which can form a dynamic pressure support for the rotor thrust plate and improve the bearing capacity of the bearing. When the top foil support 2 and the first connecting part 41 move downward to the extreme position, the second connecting part 43 squeezes the bump foil 3 under stress, and the bump foil 3 can be deformed after being loaded. In this process, the second connecting part 43 will be driven to move downward, and the height difference between the second connecting part 43 and the first connecting part 41 will be reduced. The high-pressure gas can generate a static pressure support effect here, thereby improving the bearing capacity of the bearing.

[0027] It is worth noting that if the gas pressure of the high-pressure gas changes, the strength of the reaction force will change accordingly, the relative position of the top foil bracket 2 and the first connecting part 41 will also be adjusted accordingly, and the deformation state of the wedge-shaped part 42 will also be adjusted accordingly. However, it is precisely because the top foil bracket 2 and the first connecting part 41 have the ability to move that the thrust dynamic and static pressure mixed gas bearing has a corresponding adjustment capability and can meet the use requirements under different working conditions. If the working conditions continue to change, the thrust dynamic and static pressure mixed gas bearing can have dynamic adjustment capabilities.

[0028] It is worth noting that, under ideal conditions, the gap between the top foil bracket 2 and the bearing base 1 can meet the movement requirements of the top foil bracket 2 and the first connecting part 41. Therefore, the initial gap between the top foil bracket 2 and the bearing base 1 can be reasonably set according to the extreme position of the movement of the top foil bracket 2 to make the bearing thinner.

[0029] The thrust dynamic and static mixed gas bearing introduces high-pressure gas into the wedge-shaped area of ​​the bearing, which increases the overall environmental pressure of the bearing, enhances the dynamic pressure effect, and improves the stability and load-bearing capacity of the gas film. The thrust static and dynamic mixed gas bearing can use the static pressure support and the dynamic pressure support to cooperate with each other. The high-pressure gas of the static pressure support and the high-pressure gas of the dynamic pressure support are forced to form a height difference to ensure that the dynamic pressure always works normally.

[0030] In addition, since the high-pressure gas in this embodiment is preferably a high-pressure and low-temperature gas, the high-pressure gas has a lower temperature. While being output, it can play a certain cooling role on the top foil 4, which is used to cool the heat generated by the bearing and cool the bearing.

[0031] As an optional implementation, the top foil 4 is in the shape of a fan ring, and a plurality of top foils 4 are evenly distributed along the circumferential direction. In the drawings of this embodiment, a structure in which eight top foils 4 are provided is preferred, and a high-pressure gas supply assembly 5 corresponds to the bottom of each top foil 4. When the eight high-pressure gas supply assemblies 5 are in operation, they can simultaneously output high-pressure gas, thereby balancing the overall force. The bump foil 3 is in the shape of a fan ring, and a plurality of bump foils 3 are evenly distributed along the circumference, and each bump foil 3 is connected to a corresponding top foil 4. In the drawings of this embodiment, a structure in which eight bump foils 3 are provided is preferred.

[0032] As an optional embodiment, a plurality of bosses 11 are provided on the top of the bearing base 1 along the circumferential direction, and the cross-sectional shape of the boss 11 parallel to the horizontal direction matches the horizontal projection shape of the corrugated foil 3. A corrugated foil 3 is connected to the top of each boss 11, and the matching shapes can better transmit the force. A plurality of grooves 12 are provided on the bearing base 1 along the circumferential direction, so that an accommodation space can be formed between the bearing base 1 and the top foil support 2 at the groove 12, and each groove 12 can accommodate a corresponding high-pressure gas supply component 5. Such an arrangement can optimize the structural layout of the thrust dynamic and static pressure mixed gas bearing, provide a very clever installation position for all the high-pressure gas supply components 5, and effectively reduce the thickness of the thrust dynamic and static pressure mixed gas bearing; It is worth noting that the size of the groove 12 first needs to match the space occupied by the high-pressure air supply assembly 5 as closely as possible. At the same time, it should also be noted that since the high-pressure air supply assembly 5 will move synchronously with the top foil bracket 2 and the top foil 4 relative to the bearing base 1, the groove 12 also needs to reserve space for the high-pressure air supply assembly 5 to move in the vertical direction to avoid collision here.

[0033] As an optional embodiment, the first connecting portion 41 is integrally connected to the top foil support 2. In this way, the top foil 4 and the top foil support 2 can be integrated and integrally formed during the production process, which is easy to build. Alternatively, the first connecting portion 41 and the top foil support 2 may be fixedly connected, and the fixed connection may preferably be a welding connection, which also has good connection strength.

[0034] As an optional embodiment, the high-pressure air supply assembly 5 includes a pneumatic connector 51, which is connected to the first connecting portion 41 and communicates with the vent hole 411, and the other end of the pneumatic connector 51 is communicated with an external air supply device; After the external air supply device is started, it can deliver high-pressure air to the pneumatic joint 51, and the pneumatic joint 51 can deliver the high-pressure air to the vent hole 411, and finally the high-pressure air is output from the vent hole 411 and enters the gap area between the rotor thrust disk and the thrust dynamic and static pressure mixed gas bearing; In this embodiment, an internal thread hole is preferably provided on the top foil support 2, and an external thread is provided at the connection of the pneumatic joint 51, so that the connection between the top foil support 2 and the pneumatic joint 51 is finally achieved by a threaded connection.

[0035] As an optional embodiment, it further includes a cooling channel 6, which is arranged inside the bearing base 1. A water inlet hole 15 and a water outlet hole 16 are opened on the side of the bearing base 1. The two ends of the cooling channel 6 are respectively connected to the water inlet hole 15 and the water outlet hole 16. At the same time, the water inlet hole 15 and the water outlet hole 16 can be connected to an external coolant circulation device. Driven by the external coolant circulation device, the coolant can flow from the water inlet hole 15 into the cooling channel 6, and after being fully circulated in the cooling channel 6, it returns to the external coolant circulation device from the water outlet hole 16; On the basis of the cooling effect of the high-pressure gas, the cooling channel 6 can also play a cooling role. The coolant circulating inside the cooling channel 6 can continuously cool the bearing base 1, and then form an overall cooling for the bearing through the mutual transfer of heat; The cooling channel 6 can cooperate with the high-pressure gas to form a dual cooling method, thereby enriching the basic functions.

[0036] In this embodiment, further, the water inlet hole 15 and the water outlet hole 16 are preferably arranged adjacent to each other, and the cooling channel 6 is preferably arranged around the inside of the bearing base 1. In this way, the cooling channel 6 can have a maximum overall length and can cover the area where the bearing base 1 is cooled to the greatest extent; In addition, the cooling channel 6 preferably has several bending angle changes on the flow path, which can also further increase the overall length of the cooling channel 6. The changing position of the bending angle preferably appears below the boss 11, thereby increasing the cooling intensity of the boss 11 and the corrugated foil 3 and improving the overall cooling effect.

[0037] As an optional implementation, the top foil support 2 is uniformly provided with a plurality of first connection holes 21 along the circumferential direction, and the bearing base 1 is uniformly provided with a plurality of second connection holes 13 along the circumferential direction. The number of the first connection holes 21 and the second connection holes 13 are the same and their positions correspond. In the drawings of this embodiment, a structural form in which the number of the first connection holes 21 and the number of the second connection holes 13 are both four is preferred; Each first connecting hole 21 is movably connected with the corresponding second connecting hole 13 by a plug screw. By selecting the plug screw, due to the characteristics of the plug screw, the top foil bracket 2 and the bearing base 1 can be connected to each other to a certain extent and will not be completely separated. At the same time, the top foil bracket 2 can move relative to the bearing base 1 in the vertical direction, thereby realizing the position adjustment between the top foil bracket 2 and the bearing base 1 and the adjustment of the gap between the top foil bracket 2 and the bearing base 1.

[0038] As an optional implementation, the bearing base 1 is evenly provided with a plurality of third connection holes 14 along the circumferential direction, and the third connection holes 14 are connected to external equipment through connecting bolts, thereby fixing the bearing base 1; In this embodiment, the third connecting hole 14 is preferably a threaded hole, and the external device is also provided with a threaded hole. The connecting bolt connects the third connecting hole 14 and the threaded hole on the external device together by bolt connection, which has good connection strength and can be easily disassembled and assembled.

[0039] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A thrust dynamic and static pressure mixed gas bearing, characterized in that: The invention comprises a bearing base (1), a top foil support (2), a bump foil (3), a top foil (4) and a high-pressure gas supply assembly (5); the top foil support (2) is movably connected to the bearing base (1) and a gap is formed therebetween; the bump foil (3) is connected to the bearing base (1); the top foil (4) is provided with a first connecting portion (41), a wedge-shaped portion (42) and a second connecting portion (43) in sequence along the circumferential direction; the first connecting portion (41) is connected to the top foil support (2); the second connecting portion (43) is connected to the bump foil (3); a vent hole (411) is provided on the first connecting portion (41); the high-pressure gas supply assembly (5) is connected to the top foil support (2) and communicates with the vent hole (411); the high-pressure gas supply assembly (5) can output high-pressure gas vertically upward through the vent hole (411) and cause relative displacement between the top foil support (2) and the bearing base (1).

2. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: The top foil (4) is in the shape of a fan ring, a plurality of the top foils (4) are evenly distributed along the circumferential direction, and the bottom of each top foil (4) corresponds to one of the high-pressure air supply components (5).

3. The thrust dynamic and static mixed gas bearing according to claim 2, characterized in that: The shape of the corrugated foil (3) is a fan-shaped ring, a plurality of the corrugated foils (3) are evenly distributed along the circumference, and each of the corrugated foils (3) is correspondingly connected to one of the top foils (4).

4. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: A plurality of bosses (11) are circumferentially arranged on the top of the bearing base (1), and a corrugated foil (3) is connected to the top of each boss (11). A plurality of grooves (12) are circumferentially arranged on the bearing base (1), and each groove (12) can accommodate a corresponding high-pressure air supply assembly (5).

5. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: The first connection portion (41) is integrally connected or fixedly connected to the top foil support (2).

6. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: The high-pressure air supply assembly (5) comprises a pneumatic joint (51), the pneumatic joint (51) being connected to the first connection portion (41) and communicating with the air vent (411), and the other end of the pneumatic joint (51) being communicated with an external air supply device.

7. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: It also comprises a cooling channel (6), the cooling channel (6) being arranged inside the bearing base (1), a water inlet hole (15) and a water outlet hole (16) being provided on the side of the bearing base (1), and two ends of the cooling channel (6) being respectively connected to the water inlet hole (15) and the water outlet hole (16).

8. The thrust dynamic and static mixed gas bearing according to claim 7, characterized in that: The water inlet hole (15) and the water outlet hole (16) are arranged adjacent to each other, the cooling channel (6) is arranged around the inside of the bearing base (1), and the cooling channel (6) has a plurality of bending angle changes on the flow path.

9. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: The top foil support (2) is provided with a plurality of first connection holes (21) evenly arranged along the circumference, and the bearing base (1) is provided with a plurality of second connection holes (13) evenly arranged along the circumference, the first connection holes (21) and the second connection holes (13) are the same in number and have corresponding positions, and each of the first connection holes (21) is movably connected to the corresponding second connection hole (13) via a plug screw.

10. The thrust dynamic and static mixed gas bearing according to claim 1, characterized in that: The bearing base (1) is evenly provided with a plurality of third connection holes (14) along the circumferential direction, and the third connection holes (14) are connected to external equipment via connection bolts.

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