Radial gas bearing, shell of radial gas bearing and rotating machine
By designing multiple gas circuit interfaces on the housing of the radial gas bearing, the problem of installation operation is solved, and more flexible gas pipeline connections and better air flow delivery results are achieved.
Patent Information
- Application Number
- CN202420955147.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-05-06
AI Technical Summary
The installation operation of radial gas bearings is limited, because the external air pipe needs to occupy a certain amount of space.
A shell of a radial gas bearing is designed with a variety of gas path interface distributions, including axial end face and circumferential side interfaces, which can form a variety of gas path forms and flexibly adjust the connection method of gas pipelines to adapt to different installation conditions.
Through the design of multiple gas circuit interfaces, the installation restriction caused by gas pipe placement is avoided, the scene applicability of radial gas bearings is expanded, and the air flow delivery and air pressure stability is optimized.
Smart Images
Figure CN222811080U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of bearings, and in particular to a radial gas bearing, a housing thereof, and a rotating machine. Background Art
[0002] As a typical hydrodynamic bearing, radial gas bearings use the relative motion between the rotor and the bearing to form a wedge-shaped gap between the top foil and the rotor to squeeze the air, thereby generating a hydrodynamic effect to support the rotor to achieve suspension. Due to the advantages of high precision, high speed, high load, good vibration reduction effect, and cleanliness, radial gas bearings have been widely used in aerospace, precision machining, energy, chemical industry and other fields.
[0003] In the related art, the housing of the radial gas bearing is provided with an inlet and an outlet, and gas pipes are connected to the inlet and outlet to form an air path, and gas is introduced into the bearing to maintain the gas volume. In practice, the installation of the related radial gas bearing is often limited because the external gas pipe requires a certain amount of space. Utility Model Content
[0004] The present application provides a radial gas bearing, a housing thereof, and a rotating machine, which can at least solve the problem of limited installation operations of the radial gas bearing.
[0005] In the first aspect, an embodiment of the present application provides a housing for a radial gas bearing. The housing includes a housing body and a seal, wherein: the housing body has a first interface and a second interface, both of which are connected to the inner cavity of the housing body to transport gas inside and outside the housing body; the first interface is provided on the axial end face of the housing body, and the second interface is provided on the circumferential side face of the housing body, and at least one of the first interface and the second interface has a number greater than or equal to two; the seal is detachably connected to the housing body to seal the first interface or the second interface.
[0006] In some embodiments, there are at least two first interfaces, and the two axial end surfaces of the shell body are both provided with a first interface.
[0007] In some embodiments, there are at least two second interfaces, and at least two second interfaces are respectively arranged on opposite sides of the shell body in the circumferential direction.
[0008] In some embodiments, along the axial direction of the shell body, the first interfaces on the two axial end surfaces of the shell body are arranged in a one-to-one correspondence.
[0009] In some embodiments, the second interfaces are relatively distributed along the radial direction of the shell body.
[0010] In some embodiments, along the circumference of the shell body, the first interface and the second interface are arranged in a one-to-one correspondence, or the first interface and the second interface are staggered.
[0011] In some embodiments, there are at least two second interfaces, and along the axial direction of the shell body, the second interfaces are staggered with each other.
[0012] In some embodiments, along the axial direction of the shell body, the second interface is disposed near one end of the shell body.
[0013] In some embodiments, the shell body includes a plurality of mounting positions evenly distributed along the circumference of its inner cavity, and the mounting positions are used to install a support unit that supports the top foil of the radial gas bearing, wherein: the shell body includes a uniform flow air port provided at its axial end, and the uniform flow air port is arranged one-to-one with the support unit, and along the circumference of the shell body, the uniform flow air port is evenly divided into flow guide partitions equal to the number of first interfaces on the corresponding side of the shell body, and the uniform flow air ports of the flow guide partitions are all connected to the corresponding first interfaces; and / or, on the circumference of the shell body, the second interface is arranged corresponding to the support unit.
[0014] In some embodiments, in the same axial end surface of the shell body, the first interfaces are evenly distributed along the circumference of the shell body.
[0015] In some embodiments, the second interfaces are evenly distributed along the circumference of the shell body.
[0016] In a second aspect, an embodiment of the present application provides a radial gas bearing, which includes a housing of the radial gas bearing as described in the first aspect.
[0017] In some embodiments, the radial gas bearing also includes a first gas circuit connector, which is detachably mounted on the first interface and at least partially extends into the first interface; and / or, the radial gas bearing also includes a second gas circuit connector, which is detachably mounted on the second interface and at least partially extends into the second interface.
[0018] In a third aspect, an embodiment of the present application provides a rotating machine, which includes the radial gas bearing as described in the second aspect.
[0019] The technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:
[0020] In the shell of the radial gas bearing disclosed in the embodiment of the present application, since the first interface is arranged on the axial end face of the shell body and the second interface is arranged on the circumferential side face of the shell body, that is, the two interfaces are distributed in different parts of the shell body, of course, when the first interface and the second interface are used in combination, more types of gas path forms will be formed. In other words, the shell of the embodiment of the present application has multiple gas path forms such as axial-axial, axial-circumferential, etc.
[0021] Compared with the related art, if one connection method of the inlet and exhaust pipes is limited during the installation of the bearing in the shell of the embodiment of the present application, the connection method of the inlet and exhaust pipes is adjusted according to the actual working conditions, and another connection method is selected for smooth installation. This completely avoids the installation restriction problem caused by the pipeline space occupied, and also expands the scenario applicability of the radial gas bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.
[0023] In the attached picture:
[0024] Figure 1 An axonometric view of a radial gas bearing disclosed for some embodiments of the present application;
[0025] Figure 2 A schematic diagram of the matching relationship of radial gas bearings disclosed in some embodiments of the present application;
[0026] Figure 3 A side view of a radial gas bearing disclosed for some embodiments of the present application;
[0027] Figure 4 A bottom view of a radial gas bearing disclosed for some embodiments of the present application;
[0028] Figure 5 An axonometric view of a radial gas bearing disclosed in some embodiments of the present application from another perspective;
[0029] Figure 6 A top view of a radial gas bearing with an end cover hidden according to some embodiments of the present application;
[0030] Figure 7 This is a schematic diagram of the matching relationship between the second gas circuit connector and the bearing sleeve disclosed in some embodiments of the present application.
[0031] Description of reference numerals:
[0032] 100-Radial gas bearings,
[0033] 110-shell body, 110a-bearing sleeve, 110b-end cover, 111-first interface, 112-second interface, 113-uniform flow port, 114-connecting air cavity, 115-cover plate, 120-seal,
[0034] 130-top foil, 140-support unit, 150-first gas path connector, 160-second gas path connector,
[0035] 200-Rotor. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
[0037] In order to facilitate understanding of the radial gas bearing, its housing, and the rotating machinery provided in the embodiments of the present application, the relevant technologies are first introduced in conjunction with application scenarios.
[0038] In the related art, radial gas bearings require gas to be circulated inside them to maintain the gas volume inside the bearings or to cool down the bearings by heat exchange through circulating gas flow. The gas is specifically delivered into the bearings or discharged from the bearings through gas pipes, so these gas pipes will occupy the space outside the bearings, resulting in limited installation operations.
[0039] After research, the inventors found that the above problems are mainly caused by the single air pipe access method of the bearing. Specifically, the interfaces on the bearing housing are often distributed in fixed positions. For example, the air inlet interface and the exhaust interface of the bearing are respectively arranged at the axial ends of the bearing housing, forming an axial-axial air path structure. In this way, air pipes are distributed at both axial ends of the bearing. If the equipment where the bearing is installed cannot provide sufficient air pipe installation space for the bearing at both axial ends, it will lead to failure to install.
[0040] In view of this, some embodiments of the present application provide a housing of a radial gas bearing.
[0041] See also Figure 1 to Figure 7 The shell of the radial gas bearing 100 disclosed in the embodiment of the present application includes a shell body 110 and a seal 120, wherein: the shell body 110 has a first interface 111 and a second interface 112, and the first interface 111 and the second interface 112 are both connected to the inner cavity of the shell body 110 to transport gas inside and outside the shell body 110; the first interface 111 is arranged on the axial end face of the shell body 110, and the second interface 112 is arranged on the circumferential side face of the shell body 110, and at least one of the first interface 111 and the second interface 112 has a quantity greater than or equal to two; the seal 120 is detachably connected to the shell body 110 to seal the first interface 111 or the second interface 112.
[0042] It should be understood that the shell body 110 is the main part of the shell of the radial gas bearing 100, which can provide a mounting base for other components of the radial gas bearing 100. The shell body 110 has a connected inner cavity and a matching channel, wherein the inner cavity is used to install the top foil 130 and related support structures, and the matching channel is through-through along the axial direction of the shell body 110, so as to allow the rotor 200 to pass through the radial gas bearing 100. Of course, after the rotor 200 and the radial gas bearing 100 are assembled in place, the rotor 200 can extend from both ends of the shell body 110, and a rotation gap is formed between the part of the rotor 200 inside the radial gas bearing 100 and the top foil 130, wherein a lubricating gas film can be formed to support the rotor 200 to achieve gas suspension.
[0043] The first interface 111 and the second interface 112 connect the inner cavity of the shell body 110 with the outside, so that gas can be introduced into the shell body 110 or the gas in the shell body 110 can be discharged. The embodiment of the present application does not limit the specific type of the first interface 111 and the second interface 112. When it is connected to the intake pipeline, it is an intake interface, and when it is connected to the exhaust pipeline, it is an exhaust interface. Of course, one of the first interface 111 and the second interface 112 is an intake interface, and the other is an exhaust interface.
[0044] The axial end faces of the shell body 110 refer to the two end faces of the shell body 110 distributed along the axial direction thereof. The first interface 111 may be distributed on only one axial end face of the shell body 110, or may be distributed on both axial end faces of the shell body 110 when the number of the first interface 111 is at least two. Figure 3 .
[0045] In some embodiments, the housing body 110 may include a bearing sleeve 110a and end covers 110b disposed at both axial ends of the bearing sleeve 110a. Accordingly, the first interface 111 may be disposed on the end cover 110b, and the second interface 112 may be disposed on the bearing sleeve 110a.
[0046] Regarding the number of the first interface 111 and the second interface 112, only the number of the first interface 111 or the second interface 112 may be greater than or equal to two, or both the number of the first interface 111 and the second interface 112 may be greater than or equal to two. Figure 1 and Figure 2 As shown, four first interfaces 111 are respectively provided on two axial end surfaces of the shell body 110 , and four second interfaces 112 are provided on the circumferential side surface of the shell body 110 .
[0047] Based on the above structural layout, the shell will have a variety of ways to connect the air pipe to form an air path.
[0048] To elaborate, since the number of the first interface 111 or the second interface 112 is greater than or equal to two, one of the first interface 111 and the second interface 112 can form a gas path, that is, the intake and exhaust are realized from the same type of interface. Exemplarily, the intake pipeline and the exhaust pipeline are respectively connected to the first interfaces 111 at both axial ends of the shell body 110, or the air pipeline and the exhaust pipeline are respectively connected to the first interface 111 at the same axial end of the shell body 110, or the air pipeline and the exhaust pipeline are respectively connected to the second interface 112 on the side surface of the shell body 110.
[0049] At the same time, since the first interface 111 is provided on the axial end face of the shell body 110, and the second interface 112 is provided on the circumferential side face of the shell body 110, that is, the two interfaces are distributed at different parts of the shell body 110, of course, when the first interface 111 and the second interface 112 are used together, more types of gas path forms will be formed. For example, the intake pipeline is connected to one of the first interface 111 and the second interface 112, and the exhaust pipeline is connected to the other, that is, an axial-circumferential gas path structure is formed, such as Figure 1 and Figure 2 As shown, the air intake pipeline is connected to the second interface 112, and the exhaust pipeline is connected to the first interface 111. More specifically, the four second interfaces 112 distributed along the circumference of the shell body 110 are all connected to the air intake pipeline, and the four first interfaces 111 distributed on the lower side of the shell body 110 are evenly connected to the exhaust pipeline. Of course, in other embodiments, the air intake pipeline can be configured to be partially connected to the first interface 111 and partially connected to the second interface 112, and the exhaust pipeline can also be configured to be partially connected to the first interface 111 and partially connected to the second interface 112.
[0050] It can be seen that the housing of the embodiment of the present application has multiple ways of connecting the inlet and exhaust pipelines. If one way of connecting the inlet and exhaust pipelines is limited during the installation of the bearing, the way of connecting the inlet and exhaust pipelines is adjusted according to the actual working conditions, and another way of connecting is selected for smooth installation. This completely avoids the problem of installation restrictions caused by pipeline space occupation, and also expands the scenario applicability of the radial gas bearing 100. Of course, in the process of adjusting the connection method of the inlet and exhaust pipelines, the unused first interface 111 or the second interface 112 can be blocked by the seal 120. When it is needed, the seal 120 can be removed and the pipeline can be connected to the interface.
[0051] For example, reference may be made to Figure 1If the arrangement of the intake and exhaust pipelines at both axial ends of the bearing is limited, according to the actual working conditions, the first interface 111 of the axial end face above the shell body 110 can be sealed with a seal 120, and the intake and exhaust pipelines are both connected to the first interface 111 of the same axial end face of the shell body 110, or the pipeline above the shell body 110 is connected to the second interface 112 on the side surface of the shell body 110, or the intake and exhaust pipelines are both connected to the second interface 112 on the side surface of the shell body 110.
[0052] In some embodiments, there are at least two first interfaces 111, and the two axial end surfaces of the shell body 110 are each provided with a first interface 111. Figure 1~Figure 3 and Figure 5 As shown, four first interfaces 111 are provided on both axial end surfaces of the shell body 110. Note that the first interfaces 111 are not shown in some drawings, and the first interfaces 111 may be represented by corresponding first gas path connectors 150.
[0053] In this example, since the first interface 111 is provided at both axial ends of the shell body 110, the inlet and outlet pipelines can be connected at both ends of the radial gas bearing 100 to transport the airflow roughly along the axial direction of the shell body 110. In this way, there will be no bends in the airflow transport path, which is conducive to smooth airflow transport. At the same time, the first interface 111 is provided at both axial ends of the shell body 110, and the inlet and outlet pipelines can be connected at both axial ends of the radial gas bearing 100 to realize the axial-axial gas path solution, which is a more general method that can adapt to more scenarios.
[0054] Furthermore, along the axial direction of the shell body 110, the first interfaces 111 on the two axial end surfaces of the shell body 110 are arranged one by one, as can be seen in Figure 3 , Figure 3 The dotted lines show the corresponding distribution paths of the first interfaces 111. Of course, in other embodiments, the first interfaces 111 on the two axial end surfaces of the shell body 110 may be staggered in the circumferential direction of the shell body 110.
[0055] It should be understood that the first interface 111 on the axial end surface of the shell body 110 corresponds to different connection methods of the intake and exhaust pipelines, and will correspond to different airflow delivery methods. In the scheme in which the first interfaces 111 on the two axial end surfaces of the shell body 110 correspond one to one, the airflow delivery smoothness is better, and in the scheme in which the first interfaces 111 on the two axial end surfaces of the shell body 110 are staggered in the circumferential direction of the shell body 110, the airflow has a larger flow range in the radial gas bearing 100 (i.e., the inner cavity of the shell body 110), which can optimize the air pressure stability inside the radial gas bearing 100 and make the heat exchange and cooling effect of the airflow inside the bearing more balanced.
[0056] Of course, multiple groups of first interfaces 111 may be evenly arranged around the shell body 110 , so that multiple intake and exhaust gas paths are formed around the radial gas bearing 100 , thereby improving the uniformity of airflow distribution inside the radial gas bearing 100 .
[0057] In some embodiments, there are at least two second interfaces 112, and at least two second interfaces 112 are respectively disposed on opposite sides of the shell body 110 in the circumferential direction. Figure 1 , Figure 2 and Figure 4 As shown, four second interfaces 112 are arranged along the circumference of the housing; Figure 4 As shown, on the dotted distribution path, two second interfaces 112 located in the circumferential direction of the shell body 110 are arranged opposite to each other.
[0058] In this example, since the shell body 110 is provided with second interfaces 112 which are relatively arranged in the circumferential direction thereof, the second interfaces 112 which are relatively distributed in the circumferential direction of the radial gas bearing 100 can be connected to the intake and exhaust pipelines to realize the transport of airflow in a roughly linear path, so as to facilitate the smooth transport of airflow.
[0059] Furthermore, if Figure 4 As shown, the second interface 112 is relatively distributed along the radial direction of the shell body 110. It should be understood that under such a setting, when the air inlet and outlet pipelines are connected through the second interface 112 relatively distributed in the radial direction of the shell body 110, the airflow entering the radial gas bearing 100 also enters along its radial direction, and the airflow after entering the inner cavity of the shell body 110 is transported to both sides, and finally converges at the second interface 112 on the opposite side and is discharged. It can be seen that this example allows the airflow to be evenly transported around the entire inner cavity after entering the inner cavity of the shell body 110, which can maintain the stability of the air pressure inside the radial gas bearing 100, and also makes the heat exchange and cooling effect of the airflow tend to be balanced inside the bearing.
[0060] Of course, the relative distribution of the second interface 112 in the radial direction of the shell body 110 is actually a specific implementation scheme of the relative distribution of the second interface 112 in the circumferential direction of the shell body 110. The relatively arranged second interface 112 may also not be arranged in the radial direction of the shell body 110, for example, distributed on a non-diameter chord of the circle where the shell body 110 is located.
[0061] In some embodiments, along the circumference of the shell body 110, the first interface 111 and the second interface 112 are arranged in a one-to-one correspondence, see Figure 4 , Figure 4The dotted line shows the corresponding distribution paths of the first interface 111 and the second interface 112. In this example, the first interface 111 and the second interface 112 are respectively connected to the inlet and outlet pipelines to form an axial-circumferential gas path. Since the first interface 111 and the second interface 112 are arranged in a one-to-one correspondence, the airflow can be inhaled and exhausted on the same side of the shell body 110, and the airflow will not have a large bending path along the circumferential direction inside the radial gas bearing 100, which can improve the flow smoothness of the airflow.
[0062] In another embodiment, along the circumference of the shell, the first interface 111 and the second interface 112 are staggered. In this example, the first interface 111 and the second interface 112 are respectively connected to the inlet and outlet pipes to form an axial-circumferential gas path. After the airflow enters the shell body 110, it will be deflected in the circumferential direction inside the radial gas bearing 100, so that the airflow in the radial gas bearing 100 can have a larger flow range, which can optimize the air pressure stability inside the radial gas bearing 100 and make the heat exchange and cooling effect of the airflow more balanced inside the bearing.
[0063] Of course, multiple groups of first interfaces 111 and multiple groups of second interfaces 112 can be evenly arranged on the circumference of the shell body 110, so that multiple intake and exhaust gas paths are formed on the circumference inside the radial gas bearing 100, thereby improving the uniformity of airflow distribution inside the radial gas bearing 100.
[0064] In some embodiments, there are at least two second interfaces 112, and the second interfaces 112 are staggered with each other along the axial direction of the shell body 110. It should be understood that such a structural layout makes the second interfaces 112 distributed at different positions in the axial direction of the shell body 110, that is, if the axial dimension of the shell body 110 is used as the height feature, the second interfaces 112 of this example are located at different height positions of the shell body 110. In this way, during the installation process of the radial gas bearing 100, the pipeline can be adjusted to connect with the second interfaces 112 at different height positions on the shell body 110, and the connection position of the pipeline is adjusted to adapt to the working conditions. It can be seen that this example can further optimize the scene applicability of the radial gas bearing 100.
[0065] In some embodiments, Figure 3 As shown, along the axial direction of the shell body 110, the second interface 112 is arranged near one end of the shell body 110. It should be understood that, compared with the solution in which the second interface 112 is located in the middle of the axial direction of the shell body 110, a larger installation space can be reserved between the second interface 112 and the farther end of the shell body 110 in this example, which is more conducive to the installation of the radial gas bearing 100 in some scenarios.
[0066] In some embodiments, Figure 6As shown, the shell body 110 includes a plurality of mounting positions uniformly distributed along the circumference of its inner cavity, and the mounting positions are used to install a support unit 140 that supports the top foil 130 of the radial gas bearing 100, wherein: the shell body 110 includes a uniform flow air port 113 provided at its axial end, and the uniform flow air port 113 is arranged in a one-to-one correspondence with the support unit 140, and along the circumference of the shell body 110, the uniform flow air port 113 is uniformly divided into flow guide partitions A equal in number to the first interfaces 111 on the corresponding side of the shell body 110, and the uniform flow air ports 113 of the flow guide partitions A are all connected to the corresponding first interfaces 111.
[0067] It can be understood that the radial gas bearing 100 corresponding to the shell of the embodiment of the present application can be of various types. For example, if the support unit 140 can be a corrugated foil, the radial gas bearing 100 is a corrugated foil type gas bearing; if the support unit 140 can be a spring, the radial gas bearing 100 is a spring type gas bearing. In some radial gas bearings 100, the support unit 140 needs to be cooled by airflow, so the uniformity of the airflow distribution in the inner cavity of the shell body 110 needs to be considered.
[0068] In this example, the support units 140 are arranged corresponding to the uniform flow air ports 113 along the axial direction of the shell body 110. That is to say, in the air path formed by the shell body 110, the air flow will form multiple branch flows through the uniform flow air ports 113, and then flow through each support unit 140 respectively to achieve heat exchange and cooling.
[0069] The uniform flow port 113 can be arranged close to the first interface 111 as the air intake pipeline, which can be referred to Figure 4~Figure 6 , the first interface 111 on the lower side of the shell body 110 is used as the air inlet interface. In this case, after the airflow enters the inner cavity of the shell body 110, it will be divided through each uniform flow air port 113 of the flow guide partition A corresponding to the first interface 111, and then dispersedly transported to multiple support units 140. The uniform flow air port 113 can also be set close to the first interface 111 of the exhaust pipeline, which can be referred to Figure 4~Figure 6 The first interface 111 on the lower side of the shell body 110 serves as an exhaust interface. In this case, after the airflow is sent into the shell body 110, it will flow in the inner cavity of the shell body 110, and perform heat exchange and cooling on each support unit 140, and then merge through the uniform flow port 113 of the guide partition A, and after merging, it will be discharged through the first interface 111 corresponding to the guide partition A.
[0070] It can be seen that this example optimizes the uniformity of airflow distribution in the inner cavity of the shell body 110 by setting the uniform flow air port 113 and the guide partition A and other structures in the shell body 110, thereby optimizing the uniform cooling of each support unit 140 and avoiding overheating problems of individual support units 140. At the same time, in this example, multiple uniform flow air ports 113 only correspond to one first interface 111, which can reduce the number of interfaces of the shell body 110, and thus reduce the number of pipelines outside the radial gas bearing 100, thereby reducing its external installation space requirements and facilitating the implementation of installation operations.
[0071] Furthermore, if Figure 4~Figure 6 The shell body 110 may include a connecting air cavity 114 disposed at its axial end, the connecting air cavity 114 is connected to each uniform flow air port 113 of the flow guide partition A, and the connecting air cavity 114 is also connected to a second interface 112. In a specific embodiment, as Figure 4~Figure 6 As shown, the connecting air cavity 114 can be sealed by covering it with a cover plate 115 , and the first interface 111 is opened on the cover plate 115 .
[0072] In some embodiments, Figure 6 As shown, the second interface 112 is arranged corresponding to the support unit 140 in the circumferential direction of the shell body 110. In this arrangement, whether air is inlet or outlet through the second interface 112, the airflow delivery path will pass through the area where the support unit 140 is located, thereby optimizing the cooling effect on the support unit 140.
[0073] In some embodiments, in the same axial end surface of the shell body 110, the first interfaces 111 are evenly distributed along the circumference of the shell body 110. With such a layout, in an embodiment where air is taken in or exhausted through a plurality of first interfaces 111, the plurality of first interfaces 111 evenly distributed along the same axial end surface of the shell body 110 can make the airflow entering or exhausting the inner cavity of the shell body 110 through the first inlet also evenly distributed, which is beneficial to optimizing the air pressure stability inside the radial gas bearing 100.
[0074] In some embodiments, the second interfaces 112 are evenly distributed along the circumference of the shell body 110. With such a layout, in an embodiment where air is taken in or exhausted through a plurality of second interfaces 112, the plurality of second interfaces 112 evenly distributed along the circumference of the shell body 110 can make the airflow entering or exhausting the inner cavity of the shell body 110 through the second inlet evenly distributed, which is beneficial to optimizing the air pressure stability inside the radial gas bearing 100.
[0075] See also Figure 1 to Figure 7 Some embodiments of the present application provide a radial gas bearing 100, including the housing of the radial gas bearing 100 mentioned in any of the above schemes. In this way, the radial gas bearing 100 of the embodiment of the present application has the beneficial effects of the above housing, which will not be repeated.
[0076] In some embodiments, the radial gas bearing 100 further includes a first gas path connector 150, which is detachably mounted on the first interface 111 and at least partially extends into the first interface 111. Such a layout enables the first gas path connector 150 to be embedded in the shell body 110, that is, the space inside the shell body 110 is utilized to realize the installation of part of the first gas path connector 150, which can reduce the circumferential space occupied by the first gas path connector 150 outside the radial gas bearing 100, and facilitate the installation operation.
[0077] In some embodiments, Figure 7 As shown, the radial gas bearing 100 further includes a second gas path connector 160, which is detachably mounted on the second interface 112 and at least partially extends into the second interface 112. Such a layout enables the second gas path connector 160 to be embedded in the shell body 110, that is, the space inside the shell body 110 is utilized to realize the installation of part of the second gas path connector 160, which can reduce the axial space occupied by the second gas path connector 160 outside the radial gas bearing 100, and is conducive to the implementation of the installation operation.
[0078] See also Figure 1 to Figure 7 , some embodiments of the present application provide a rotating machine, including the radial gas bearing 100 mentioned in the above scheme. In this way, the rotating device disclosed in the embodiment of the present application has the beneficial effects of the above radial gas bearing 100, which will not be repeated. It should be understood that the rotating device is a device that uses the above radial gas bearing 100 to achieve rotational drive, and its type is not limited. For example, the rotating machine can be an air compressor, an air cycle machine, a high-speed motor, a micro turbojet engine, etc.
[0079] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.
[0080] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims
1. A housing of a radial gas bearing, characterized in that: The housing comprises a housing body and a sealing member, wherein: The shell body has a first interface and a second interface, both of which are in communication with the inner cavity of the shell body for conveying gas inside and outside the shell body; the first interface is provided on the axial end surface of the shell body, and the second interface is provided on the circumferential side surface of the shell body, and at least one of the first interface and the second interface has a quantity greater than or equal to two; The sealing member is detachably connected to the shell body to seal the first interface or the second interface.
2. The housing according to claim 1, characterized in that There are at least two first interfaces, and both axial end surfaces of the shell body are provided with the first interfaces; and / or there are at least two second interfaces, and at least two second interfaces are respectively provided on opposite sides of the shell body in the circumferential direction.
3. The housing according to claim 2, characterized in that: Along the axial direction of the shell body, the first interfaces on the two axial end faces of the shell body are arranged in a one-to-one correspondence; and / or, the second interfaces are relatively distributed along the radial direction of the shell body.
4. The housing according to claim 1, characterized in that Along the circumference of the shell body, the first interface and the second interface are arranged in a one-to-one correspondence, or the first interface and the second interface are staggered.
5. The housing according to claim 1, characterized in that There are at least two second interfaces, and the second interfaces are staggered with each other along the axial direction of the shell body; and / or, along the axial direction of the shell body, the second interface is arranged close to one end of the shell body.
6. The housing according to any one of claims 1 to 5, characterized in that The shell body comprises a plurality of mounting positions evenly distributed along the circumference of its inner cavity, wherein the mounting positions are used to mount a support unit supporting a top foil of the radial gas bearing, wherein: The shell body includes a uniform flow air port provided at an axial end thereof, the uniform flow air port is arranged in one-to-one correspondence with the support unit, and along the circumference of the shell body, the uniform flow air port is evenly divided into flow guide partitions equal in number to the first interface on the corresponding side of the shell body, and the uniform flow air ports of the flow guide partitions are all connected to the corresponding first interface; And / or, on the circumference of the shell body, the second interface is arranged corresponding to the supporting unit.
7. The housing according to any one of claims 1 to 5, characterized in that In the same axial end face of the shell body, the first interfaces are evenly distributed along the circumference of the shell body; and / or the second interfaces are evenly distributed along the circumference of the shell body.
8. A radial gas bearing, characterized in that: A housing comprising the radial gas bearing according to any one of claims 1 to 7.
9. The radial gas bearing according to claim 8, characterized in that: The radial gas bearing also includes a first gas circuit connector, which is detachably mounted on the first interface and at least partially extends into the first interface; and / or, the radial gas bearing also includes a second gas circuit connector, which is detachably mounted on the second interface and at least partially extends into the second interface.
10. A rotating machine, characterized in that: Includes the radial gas bearing described in claim 8 or 9.