A casing and horizontally split centrifugal compressor

Abstract

The application belongs to the technical field of compressors and discloses a casing and a horizontal split centrifugal compressor, wherein the casing comprises a first shell and a second shell, a center hole is formed between the first shell and the second shell, the first shell is welded with a first channel plate spirally arranged along the axial direction of the center hole, a second channel plate extending along the circumferential direction of the center hole and a third channel plate welded to the first channel plate and the second channel plate, the second shell is welded with a first flow channel plate extending along the circumferential direction of the center hole, a second flow channel plate arranged along the circumferential direction of the center hole and a third flow channel plate welded to the first flow channel plate and the second flow channel plate, the distance between the third flow channel plate and the center axis of the center hole gradually increases along the flow direction of the gas, thereby reducing the size of the casing in the axial direction of the center hole and reducing the size of the casing in the radial direction of the casing, so that the casing is conveniently designed to be small in size.

Description

Technical Field

[0001] This application belongs to the technical field of compressors, specifically relating to a casing and a horizontally split centrifugal compressor. Background Technology

[0002] Horizontally split centrifugal compressors are also called split or center-split compressors. The casing is an important component of the horizontally split centrifugal compressor. It includes an upper casing and a lower casing located at the bottom of the upper casing. The upper casing and the lower casing are fixedly connected by bolts.

[0003] Currently, common casings are usually manufactured using casting technology. However, when casting a casing, it is necessary to first make a mold and a sand mold, and then pour liquid metal into the mold to form the casing. This results in a long production cycle and high cost for the casing.

[0004] To shorten the production cycle and reduce the cost of casings, a type of casing manufactured using welding has emerged on the market. To create a compression channel with a gradually changing flow area along the circumference of the casing, two common methods exist. One method involves welding a channel plate extending circumferentially and a guide plate spirally arranged axially within the casing, causing the distance between the channel plate and the guide plate to gradually change circumferentially. While this achieves a gradual change in the flow area along the central axis of the casing, it increases the axial dimension of the casing, resulting in a larger volume. The other method involves welding a guide plate extending circumferentially within the casing, with the distance between the guide plate and the central axis of the casing gradually changing circumferentially. While this also achieves a gradual change in the flow area along the circumference of the casing, it increases the radial dimension of the casing, similarly leading to a larger volume. Therefore, reducing the volume of the casing has become a pressing technical problem. Utility Model Content

[0005] This application provides a housing to reduce the size of the housing, thereby facilitating the miniaturization design of the horizontally split centrifugal compressor.

[0006] The technical solution adopted in this application is as follows: A housing includes a first housing and a second housing disposed opposite to the first housing. A central hole for mounting a rotor is formed between the first housing and the second housing. The first housing is welded with a first channel plate extending helically along the central hole, a second channel plate extending circumferentially along the central hole, and a third channel plate welded to the first channel plate and the second channel plate. The first channel plate, the second channel plate, and the third channel plate together form a flow channel. The distance between the first channel plate and the second channel plate gradually increases along the flow direction of gas in the flow channel. The second housing is welded with a first flow channel plate extending circumferentially along the central hole, a second flow channel plate extending circumferentially along the central hole, and a third flow channel plate welded to the first flow channel plate and the second flow channel plate. The first flow channel plate, the second flow channel plate, and the third flow channel plate together form an airflow channel communicating with the flow channel. The distance between the third channel plate and the central axis of the central hole gradually increases along the flow direction of gas in the airflow channel, and gas enters the flow channel through the airflow channel.

[0007] By adopting the above technical solution, since the first channel plate is welded to the first housing, the third channel plate is welded to the first channel plate and the second channel plate, the first flow channel plate is welded to the second housing, and the third flow channel plate is welded to the first flow channel plate and the second flow channel plate, the housing can be formed by the welding process of the sheet metal, thereby shortening the production cycle of the housing and reducing the production cost of the housing.

[0008] As the distance between the first and second channel plates gradually increases along the direction of gas flow in the guide channel, the flow area of ​​the guide channel gradually increases along the direction of gas flow. As the distance between the third flow channel plate and the central axis of the central hole gradually increases along the direction of gas flow in the airflow channel, the flow area of ​​the airflow channel gradually increases along the direction of gas flow. Furthermore, as the gas enters the guide channel through the airflow channel, the flow area of ​​the channel supplying gas flow inside the casing gradually increases along the direction of gas flow.

[0009] In summary, the combination of a first channel plate spirally arranged along the central hole axis and a third flow channel plate with a gradually increasing distance between the third flow channel plate and the central hole axis along the circumference of the central hole creates a channel with a gradually increasing flow area inside the housing. Gas enters the guide channel through the airflow channel, thereby reducing the axial dimension of the first channel plate in the central hole axis to reduce the length of the housing, and reducing the radial dimension of the third flow channel plate in the housing to reduce the diameter of the housing, thus reducing the volume of the housing and achieving the effect of facilitating the miniaturization design of the housing.

[0010] Furthermore, since both the first and second flow channels extend circumferentially along the central axis, they are in a parallel state, making the change in the airflow channel more uniform. This section corresponds to the section with the fastest flow velocity in the airflow channel, thus effectively reducing the kinetic energy loss of the gas in the airflow channel.

[0011] Optionally, the flow channel has an air inlet end, and the distance between the first channel plate and the second channel plate at the air inlet end is equal to the distance between the first flow channel plate and the second flow channel plate.

[0012] By adopting the above technical solution, since the distance between the first channel plate and the second channel plate at the air inlet end is equal to the distance between the first flow channel plate and the second flow channel plate, the air outlet position of the airflow channel and the air inlet position of the guide channel can be completely opposite. This allows the gas to enter the guide channel more smoothly through the airflow channel, and avoids the situation where the gas is blocked by the wall when it enters the guide channel through the airflow channel, thereby further reducing the kinetic energy loss of the gas. At the same time, it can also avoid fluctuations caused by sudden changes, thereby increasing the working stability of the horizontal split centrifugal compressor.

[0013] Optionally, the flow channel has an air outlet end, and the second housing is provided with a first plate, a second plate arranged parallel to and spaced apart from the first plate, and a third plate connected to the first plate and the second plate. The first plate, the second plate, and the third plate together form an air outlet cavity opposite to the air outlet end. The air outlet cavity is connected to the airflow channel, and the distance between the first plate and the second plate is equal to the distance between the first channel plate and the second channel plate at the air outlet end.

[0014] By adopting the above technical solution, since the first plate, the second plate, and the third plate together form an outlet cavity opposite to the outlet end, and the distance between the first plate and the second plate is equal to the distance between the first channel plate and the second channel plate at the outlet end, the outlet end of the guide channel can be completely opposite to the outlet cavity. This makes the gas flow more smoothly into the outlet cavity through the guide channel, and avoids the situation where the gas is blocked by the wall when it enters the outlet cavity through the guide channel, thereby further reducing the loss of kinetic energy of the gas.

[0015] Optionally, the thickness of the third channel plate is greater than the thickness of the first channel plate, and the third channel plate constitutes a portion of the first housing.

[0016] By adopting the above technical solution, since the thickness of the third channel plate is greater than that of the first channel plate, the pressure-bearing capacity of the third channel is increased, thereby ensuring the pressure-bearing capacity of the casing. Furthermore, since the third channel plate constitutes part of the first casing, the number of components that need to be welded during the production of the casing is reduced, thereby further improving the production efficiency of the casing. On the other hand, the production and manufacturing cost of the casing is further reduced.

[0017] Optionally, the first housing has a first shell plate located on the side of the first channel plate opposite to the second channel plate, and the first shell plate is welded to the third channel plate.

[0018] By adopting the above technical solution, since the first shell plate is located on the side of the first channel plate away from the second channel plate and the first shell plate is welded to the third channel plate, on the one hand, the risk of air leakage of the casing can be reduced to ensure the stable operation of the horizontally split centrifugal compressor with the casing of this application installed. On the other hand, the stability of the third channel plate is increased to further improve the pressure bearing capacity of the third channel plate, thereby further ensuring the stable operation of the horizontally split centrifugal compressor with the casing of this application installed.

[0019] Optionally, multiple flow channels are provided along the axial direction of the central hole, the thickness of the second channel plate between two adjacent flow channels is greater than the thickness of the first channel plate, and a portion of the second channel plate constitutes a portion of the first housing.

[0020] By adopting the above technical solution, since the thickness of the second channel plate between two adjacent flow channels is greater than the thickness of the first channel plate, and a part of the second channel plate constitutes a part of the first housing, the pressure-bearing capacity of the second channel plate is improved on the one hand, and the number of second channel plates and the number of housing components are reduced on the other hand. This reduces the number of components that need to be welded when manufacturing the housing, thereby further reducing the manufacturing cost of the housing and further improving the production efficiency of the housing.

[0021] Optionally, the exterior of the first housing has a first reinforcing rib, the first reinforcing rib having a first segment and a second segment, the first segment being welded to the first housing plate, and the second segment being welded to the area where the third channel plate and the second channel plate constitute the first housing.

[0022] By adopting the above technical solution, since the first section is welded to the first shell plate and the second section is welded to the area where the third channel plate and the second channel plate constitute the first shell, the structural strength of the first shell can be increased by using the first reinforcing rib, thereby ensuring the pressure-bearing capacity of the first shell and ensuring the service life of the first shell.

[0023] Optionally, the second housing has a second shell plate extending circumferentially along the central hole, the third flow channel plate is welded to the second shell plate, and a portion of the second shell plate forms the channel wall of the airflow channel.

[0024] By adopting the above technical solution, the stability of the third flow channel plate is increased because it is welded to the second housing, thereby increasing the pressure-bearing capacity of the third flow channel plate; and since a part of the second housing forms the channel wall of the airflow channel, the volume of the housing in its own radial direction is further reduced, so as to further achieve the effect of facilitating the miniaturization design of the housing.

[0025] This application also provides a horizontally split centrifugal compressor to reduce the volume of the horizontally split centrifugal compressor, thereby facilitating the miniaturization design of the horizontally split centrifugal compressor.

[0026] A horizontally split centrifugal compressor includes a rotor and a housing as described above. The rotor includes a main shaft mounted in the central hole and an impeller mounted on the main shaft. The impeller is configured corresponding to the guide channel and the airflow channel.

[0027] By adopting the above technical solution, since the horizontally split centrifugal compressor in this application uses the aforementioned casing, the axial dimension of the casing in the center hole and the radial dimension of the casing are reduced, thereby achieving the effect of facilitating the miniaturization design of the horizontally split centrifugal compressor.

[0028] Optionally, the impeller includes a first impeller and a second impeller, wherein the blades of the first impeller and the first channel plate corresponding to the first impeller are located on the side of the first impeller away from the second impeller, and the blades of the second impeller and the first channel plate corresponding to the second impeller are located on the side of the second impeller away from the first impeller.

[0029] By adopting the above technical solution, since the blades of the first impeller and the first channel plate corresponding to the first impeller are both located on the side of the first impeller away from the second impeller, and the blades of the second impeller and the first channel plate corresponding to the second impeller are both located on the side of the second impeller away from the first impeller, the force balance of the main shaft in its own axial direction can be ensured as much as possible when the horizontally split centrifugal compressor is working, so as to ensure the working stability of the horizontally split centrifugal compressor.

[0030] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. The housing in this application includes a first housing and a second housing opposite to the first housing. A central hole for mounting a rotor is formed between the first housing and the second housing. The first housing is welded with a first channel plate spirally arranged along the axial direction of the central hole, a second channel plate extending circumferentially along the central hole, and a third channel plate welded to the first and second channel plates. The first, second, and third channel plates together form a flow guide channel. The distance between the first and second channel plates gradually increases along the flow direction of the gas in the flow guide channel. The second housing is welded with a first flow channel plate extending circumferentially along the central hole, a second flow channel plate extending circumferentially along the central hole, and a third flow channel plate. The first flow channel plate and the third flow channel plate welded to the first and second flow channel plates together form an airflow channel that communicates with the guide channel. The distance between the third channel plate and the central axis of the central hole gradually increases along the flow direction of the gas in the airflow channel. The gas enters the guide channel through the airflow channel, thereby reducing the axial size of the first channel plate in the central hole to reduce the length of the housing, and reducing the radial size of the third flow channel plate in the housing to reduce the diameter of the housing, thus reducing the volume of the housing and achieving the effect of facilitating the miniaturization design of the housing.

[0031] 2. The flow channel in this application has an air inlet end. The distance between the first channel plate and the second channel plate at the air inlet end is equal to the distance between the first flow channel plate and the second flow channel plate. As a result, the air outlet position of the airflow channel and the air inlet position of the flow channel can be completely opposite. This allows the gas to enter the flow channel more smoothly through the airflow channel, and avoids the situation where the gas is blocked by the wall when it enters the flow channel through the airflow channel. This further reduces the kinetic energy loss of the gas and avoids fluctuations caused by sudden changes, thereby increasing the working stability of the horizontal split centrifugal compressor.

[0032] 3. The flow channel in this application has an outlet end. The second housing is provided with a first plate, a second plate arranged parallel to and spaced apart from the first plate, and a third plate connected to the first plate and the second plate. The first plate, the second plate, and the third plate together form an outlet chamber opposite to the outlet end. The outlet chamber is connected to the airflow channel, and the distance between the first plate and the second plate is equal to the distance between the first channel plate and the second channel plate at the outlet end. This allows the outlet end of the flow channel to be completely opposite to the outlet chamber, thereby making the gas flow more smoothly into the outlet chamber through the flow channel and avoiding the situation where the gas is blocked by the wall when it enters the outlet chamber through the flow channel, thus further reducing the kinetic energy loss of the gas. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the housing described in one embodiment of this application; Figure 2 This is a schematic diagram of the casing from another perspective in one embodiment of this application; Figure 3 This is a schematic diagram of the housing structure from another perspective in one embodiment of this application; Figure 4 This is a cross-sectional view of the housing described in one embodiment of this application; Figure 5 This is a cross-sectional view of the housing described in one embodiment of this application, where the dashed arrows indicate the direction of gas flow. Figure 6 This is a schematic diagram of the structure of the first housing in one embodiment of this application; Figure 7 This is a cross-sectional view of the second housing in one embodiment of this application; Figure 8 This is a schematic diagram of the structure of the second housing in one embodiment of this application; Figure 9 This is a partial structural cross-sectional view of the horizontally split centrifugal compressor described in one embodiment of this application.

[0034] Figure label: 1. First shell; 11. First channel plate; 12. Second channel plate; 13. Third channel plate; 14. Primary flow guide channel; 15. Secondary flow guide channel; 16. Tertiary flow guide channel; 17. Quaternary flow guide channel; 18. First intake casting; 181. First shell plate; 182. First partition plate; 183. First reinforcing rib; 184. Third shell plate; 2. Second shell; 21. First flow channel plate; 22. Second flow channel plate; 23. Third flow channel plate; 24. 1. Primary airflow channel; 25. Secondary airflow channel; 26. Tertiary airflow channel; 27. Quaternary airflow channel; 28. Second intake casting; 281. Bearing housing; 282. First plate; 283. Second plate; 284. Third plate; 285. Second shell plate; 286. Fifth shell plate; 287. Fixing claw; 288. Second partition plate; 289. Second reinforcing rib; 3. Center hole; 4. Rotor; 41. Main shaft; 42. Impeller; 5. Flow guide. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0037] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0040] Reference Figures 1 to 8A housing is disclosed, comprising a first housing 1 and a second housing 2 disposed opposite to the first housing 1. A central hole 3 for mounting a rotor 4 is formed between the first housing 1 and the second housing 2. The first housing 1 is welded with a first channel plate 11 extending helically along the central hole 3, a second channel plate 12 extending circumferentially along the central hole 3, and a third channel plate 13 welded to the first channel plate 11 and the second channel plate 12. The first channel plate 11, the second channel plate 12, and the third channel plate 13 together form a flow guiding channel. The space between the first channel plate 11 and the second channel plate 12... The distance gradually increases along the flow direction of the gas in the guide channel; the second shell 2 is welded with a first flow channel plate 21 extending circumferentially along the central hole 3, a second flow channel plate 22 extending circumferentially along the central hole 3, and a third flow channel plate 23 welded to the first flow channel plate 21 and the second flow channel plate 22. The first flow channel plate 21, the second flow channel plate 22 and the third flow channel plate 23 together form an airflow channel communicating with the guide channel. The distance between the third channel plate 13 and the central axis of the central hole 3 gradually increases along the flow direction of the gas in the airflow channel, and the gas enters the guide channel through the airflow channel.

[0041] It is understood that the first channel plate 11 is a spiral plate, the second channel plate 12 is a fan-shaped plate, and the third channel plate 13 is an arc-shaped plate. The first channel plate 11 and the second channel plate 12 are spaced apart in the axial direction of the central hole 3, and the second channel plate 12 is arranged parallel to the plane perpendicular to the central axis of the central hole 3. The first flow channel plate 21 and the second flow channel plate 22 are both fan-shaped plates, and the third channel plate 13 is an arc-shaped plate. The first flow channel plate 21 and the second flow channel plate 22 are spaced apart in the axial direction of the central hole 3, and the first flow channel plate 21 and the second flow channel plate 22 are both parallel to the plane perpendicular to the central axis of the central hole 3.

[0042] Since the first channel plate 11 is welded to the first housing 1, the third channel plate 13 is welded to the first channel plate 11 and the second channel plate 12, the first flow channel plate 21 is welded to the second housing 2, and the third flow channel plate 23 is welded to the first flow channel plate 21 and the second flow channel plate 22, the housing can be formed by the welding process of the sheet metal, thereby shortening the production cycle of the housing and reducing the production cost of the housing.

[0043] As the distance between the first channel plate 11 and the second channel plate 12 gradually increases along the direction of gas flow in the guide channel, the flow area of ​​the guide channel gradually increases along the direction of gas flow. As the distance between the third flow channel plate 23 and the central axis of the central hole 3 gradually increases along the direction of gas flow in the airflow channel, the flow area of ​​the airflow channel gradually increases along the direction of gas flow. Furthermore, as the gas enters the guide channel through the airflow channel, the flow area of ​​the channel supplying gas flow inside the casing gradually increases along the direction of gas flow.

[0044] In summary, the combination of the first channel plate 11 spirally arranged along the central hole 3 and the third flow channel plate 23 with a gradually increasing distance between the third channel plate 23 and the central axis of the central hole 3 along the circumference of the central hole 3 creates a channel with a gradually increasing flow area inside the housing. Gas enters the guide channel through the airflow channel, thereby reducing the axial dimension of the first channel plate 11 in the central hole 3 to reduce the length of the housing, and reducing the radial dimension of the third flow channel plate 23 in the housing to reduce the diameter of the housing, thus reducing the volume of the housing and achieving the effect of facilitating the miniaturization design of the housing.

[0045] Since both the first flow channel plate 21 and the second flow channel plate 22 extend circumferentially along the central axis, the first flow channel plate 21 and the second flow channel plate 22 are in a parallel state, so that the change of the airflow channel is more uniform. This section is the section with the fastest flow velocity in the corresponding airflow channel, thus effectively reducing the kinetic energy loss of the gas in the airflow channel.

[0046] The better one is to refer to Figure 1 and Figure 2 The first housing 1 is located on top of the second housing 2, and the bottom of the first housing 1 has a first edge extending circumferentially along the first housing 1, and the top of the second housing 2 has a second edge extending circumferentially along the second housing 2. The first edge and the second edge are fixedly connected by bolts to achieve a fixed connection between the first housing 1 and the second housing 2.

[0047] Furthermore, refer to Figure 4 The first housing 1 has a first air intake casting 18 welded to one end, and the second housing 2 has a second air intake casting 28 welded to one end. The first air intake casting 18 and the second air intake casting 28 are joined together to form the horizontal air intake of the housing. Both ends of the second housing 2 are welded with bearing seats 281. The bearing seats 281 located at the same end of the second housing 2 as the second air intake casting 28 are integrally formed with the second air intake casting 28 to reduce the number of parts that need to be welded during the production of the housing, thereby improving the production efficiency of the housing.

[0048] Furthermore, an exhaust pipe is welded to the bottom of the second housing 2, and the exhaust pipe is connected to the guide channel so that the gas flowing along the guide channel is discharged through the exhaust pipe.

[0049] In a preferred embodiment, refer to Figure 6 and Figure 8 The flow channel has an air inlet end, and the distance between the first channel plate 11 and the second channel plate 12 at the air inlet end is equal to the distance between the first flow channel plate 21 and the second flow channel plate 22.

[0050] It is understandable that the gas discharged through the airflow channel enters the guide channel through the air inlet end of the guide channel.

[0051] Since the distance between the first channel plate 11 and the second channel plate 12 at the air inlet is equal to the distance between the first flow channel plate 21 and the second flow channel plate 22, the air outlet position of the airflow channel and the air inlet position of the guide channel can be completely opposite. This allows the gas to enter the guide channel more smoothly through the airflow channel, and avoids the situation where the gas is blocked by the wall when it enters the guide channel through the airflow channel, thereby further reducing the kinetic energy loss of the gas. At the same time, it can also avoid fluctuations caused by sudden changes, thereby increasing the working stability of the horizontal split centrifugal compressor.

[0052] Furthermore, refer to Figure 6 and Figure 8 The flow channel has an air outlet end. The second housing 2 is provided with a first plate 282, a second plate 283 arranged parallel to and spaced apart from the first plate 282, and a third plate 284 connected to the first plate 282 and the second plate 283. The first plate 282, the second plate 283 and the third plate 284 together form an air outlet cavity opposite to the air outlet end. The air outlet cavity is connected to the airflow channel, and the distance between the first plate 282 and the second plate 283 is equal to the distance between the first channel plate 11 and the second channel plate 12 at the air outlet end.

[0053] It is understandable that the gas flows out of the guide channel through the outlet end, and the outlet end of the guide channel is connected to the outlet pipe through the outlet chamber.

[0054] Since the first plate 282, the second plate 283, and the third plate 284 together form an outlet cavity opposite to the outlet end, and the distance between the first plate 282 and the second plate 283 is equal to the distance between the first channel plate 11 and the second channel plate 12 at the outlet end, the outlet end of the guide channel can be completely opposite to the outlet cavity. This makes it easier for the gas to enter the outlet cavity through the guide channel, and avoids the situation where the gas is blocked by the wall when it enters the outlet cavity through the guide channel, thereby further reducing the loss of kinetic energy of the gas.

[0055] It should be noted that the changes in the cross-sectional area of ​​the airflow channel and the guide channel along the gas flow direction are obtained based on design calculations.

[0056] This application does not specifically limit the connection method between the third plate 284 and the first plate 282 and the second plate 283. Preferably, refer to Figure 8The first plate 282 and the third plate 284 are integrally formed, that is, the first plate 282 and the third plate 284 together constitute an L-shaped plate structure. The third plate 284 is fixedly connected to the second plate 283 by welding, so as to reduce the manufacturing difficulty of the casing and improve the production efficiency of the casing. In other embodiments, the third plate 284 can also be fixedly connected to the first plate 282 and the second plate 283 by welding, or the third plate 284 can be integrally formed with the first plate 282 and the second plate 283, that is, the first plate 282, the second plate 283 and the third plate 284 together constitute a C-shaped plate structure.

[0057] Furthermore, refer to Figure 4 The thickness of the third channel plate 13 is greater than that of the first channel plate 11, so as to improve the pressure bearing capacity of the third channel plate 13, thereby improving the pressure bearing capacity of the housing; and the third channel plate 13 constitutes part of the first housing 1, thereby reducing the number of parts that need to be welded when producing the housing, thereby further improving the production efficiency of the housing, and further reducing the production cost of the housing.

[0058] Of course, in other embodiments, the thickness of the third channel plate 13 may also be equal to the thickness of the first channel plate 11, and the first housing 1 has a plate body located outside the third channel plate 13.

[0059] Furthermore, refer to Figure 4 The first housing 1 has a first housing plate 181, which is located on the side of the first channel plate 11 away from the second channel plate 12, and the first housing plate 181 is welded to the third channel plate 13.

[0060] It is understandable that the first shell plate 181 extends circumferentially along the central hole 3, and the first shell plate 181 is fan-shaped.

[0061] Since the first shell plate 181 is located on the side of the first channel plate 11 away from the second channel plate 12, and the first shell plate 181 is welded to the third channel plate 13, on the one hand, the risk of air leakage of the casing can be reduced to ensure the stable operation of the horizontally split centrifugal compressor with the casing of this application installed. On the other hand, the stability of the third channel plate 13 is increased to further improve the pressure bearing capacity of the third channel plate 13, thereby further ensuring the stable operation of the horizontally split centrifugal compressor with the casing of this application installed.

[0062] Furthermore, refer to Figure 4 and Figure 6Multiple flow channels are provided along the axial direction of the central hole 3. The thickness of the second channel plate 12 between two adjacent flow channels is greater than the thickness of the first channel plate 11, and a part of the second channel plate 12 constitutes a part of the first housing 1.

[0063] It is understandable that multiple airflow channels are also provided, and each airflow channel corresponds to a guide channel. Multiple air outlet pipes are provided, and each air outlet pipe corresponds to a guide channel. Multiple air inlet pipes are provided at the bottom of the second housing 2. The number of air inlet pipes is one less than the number of air outlet pipes. A horizontal air inlet is provided for one of the airflow channels, and multiple air inlet pipes are provided for the remaining multiple airflow channels respectively.

[0064] Since the thickness of the second channel plate 12 between two adjacent flow channels is greater than the thickness of the first channel plate 11, and a portion of the second channel plate 12 constitutes a portion of the first housing 1, the pressure-bearing capacity of the second channel plate 12 is improved on the one hand, and the number of second channel plates 12 and the number of housing components are reduced on the other hand. This reduces the number of components that need to be welded during the manufacturing of the housing, thereby further reducing the manufacturing cost of the housing and further improving the production efficiency of the housing.

[0065] Preferably, four guide channels are arranged at intervals along the axial direction of the central hole 3, four airflow channels are arranged at intervals along the axial direction of the central hole 3, and the four airflow channels are arranged in a one-to-one correspondence with the four guide channels. There are three air inlet pipes and four air outlet pipes.

[0066] It is understood that each flow channel is formed by a first channel plate 11, a second channel plate 12 and a third channel plate 13, and each airflow channel is formed by a first flow channel plate 21, a second flow channel plate 22 and a third flow channel plate 23.

[0067] To facilitate understanding of the technical solution in this application, the four guiding channels are defined as a primary guiding channel 14, a secondary guiding channel 15, a tertiary guiding channel 16, and a quaternary guiding channel 17, respectively. The volumes of the primary guiding channel 14, the secondary guiding channel 15, the tertiary guiding channel 16, and the quaternary guiding channel 17 gradually decrease. The four airflow channels are defined as a primary airflow channel 24 opposite to the primary guiding channel 14, a secondary airflow channel 25 opposite to the secondary guiding channel 15, a tertiary airflow channel 26 opposite to the tertiary guiding channel 16, and a quaternary airflow channel 27 opposite to the quaternary guiding channel 17, respectively. The primary airflow channel 24, the secondary airflow channel 25, the tertiary airflow channel 26, the tertiary airflow channel 27, the tertiary airflow channel 26, the tertiary airflow channel 27, the tertiary airflow channel 28, the tertiary airflow channel 29, the tertiary airflow channel 20, the tertiary airflow channel 20, the tertiary airflow channel 21, the tertiary airflow channel 2 ...2, the tertiary airflow channel 23, the tertiary airflow channel 24, the tertiary airflow channel 25, the tertiary airflow channel 26, the tertiary airflow channel 27, the tertiary airflow channel 28, the tertiary airflow channel 29, the tertiary air 5. The volumes of the third-stage airflow channel 26 and the fourth-stage airflow channel 27 are gradually reduced; the horizontal air inlet is set to correspond to the first-stage airflow channel 24 and positioned as the first-stage air inlet; the air inlet pipe corresponding to the second-stage airflow channel 25 is defined as the second-stage air inlet; the air inlet pipe corresponding to the third-stage airflow channel 26 is defined as the third-stage air inlet; and the air inlet pipe corresponding to the fourth-stage airflow channel 27 is defined as the fourth-stage air inlet; the four exhaust pipes are respectively defined as the first-stage exhaust port corresponding to the first-stage guide channel 14, the second-stage exhaust port corresponding to the second-stage guide channel 15, the third-stage exhaust port corresponding to the third-stage guide channel 16, and the fourth-stage exhaust port corresponding to the fourth-stage guide channel 17.

[0068] The primary flow channel 14 and the secondary flow channel 15 are located at both ends of the first housing 1, the tertiary flow channel 16 and the quaternary flow channel 17 are located between the primary flow channel 14 and the secondary flow channel 15, and the quaternary flow channel 17 is located on the side of the tertiary flow channel 16 away from the primary flow channel 14; the primary airflow channel 24 and the secondary airflow channel 25 are located at both ends of the second housing 2, the tertiary airflow channel 26 and the quaternary airflow channel 27 are located between the primary airflow channel 24 and the secondary airflow channel 25, and the quaternary airflow channel 27 is located on the side of the tertiary airflow channel 26 away from the primary airflow channel 24.

[0069] Reference Figure 4 The first channel plate 11 constituting the first-level flow channel 14 and the first channel plate 11 constituting the second-level flow channel 15 are both provided with a first housing 1 on the opposite side; or, it can be understood that the second channel plate 12 constituting the first-level flow channel 14 constitutes the first housing 1 located on the opposite side of the first channel plate 11 constituting the third-level flow channel 16, and the second channel plate 12 constituting the second-level flow channel 15 constitutes the first housing 1 located on the opposite side of the first channel plate 11 constituting the fourth-level flow channel 17.

[0070] The third-level flow guide channel 16 and the fourth-level flow guide channel 17 share the third channel plate 13; or, it can be understood that the third channel plate 13 constituting the third-level flow guide channel 16 and the third channel plate 13 constituting the fourth-level flow guide channel 17 are welded and fixed together.

[0071] Of course, in other embodiments, there may be other numbers of both the guide channels and the airflow channels.

[0072] The better one is to refer to Figure 4 , Figure 6 and Figure 8 The first housing 1 has an arc-shaped first partition plate 182 inside. The first partition plate 182 is located inside the first channel plate 11 and the second channel plate 12, and the first channel plate 11 is welded to the first partition plate 182. The first partition plate 182 is welded to the first housing plate 181, and there is a first gap between the first partition plate 182 and the second channel plate 12 for airflow. The first housing 1 has a third housing plate 184, which is located at the end of the first housing 1 away from the horizontal air inlet. The third housing plate 184 is located on the side of the first housing plate 181 near the central hole 3, and the third housing plate 184 is located on the side of the first housing plate 181 near the central hole 3. 84 is fixedly connected to the first partition plate 182; the interior of the second housing 2 is provided with an arc-shaped second partition plate 288. Two second partition plates 288 are provided corresponding to the first flow channel plate 21 and the second flow channel plate 22 that form the same airflow channel. The two second partition plates 288 are spaced apart and form a second gap for airflow to pass through. The two second partition plates 288 are both located inside the first flow channel plate 21 and the second flow channel plate 22. The first flow channel plate 21 and the second flow channel plate 22 are respectively welded to the two second partition plates 288. A central hole 3 is formed between the first partition plate 182 and the second partition plate 288.

[0073] Furthermore, refer to Figure 1 , Figure 2 and Figure 4 The exterior of the first housing 1 has a first reinforcing rib 183. The first reinforcing rib 183 has a first section and a second section. The first section is welded to the first housing plate 181, and the second section is welded to the area of ​​the third channel plate 13 and the second channel plate 12 that constitute the first housing 1.

[0074] It is understandable that the first and second paragraphs form an angle between them.

[0075] Since the first section is welded to the first shell plate 181, and the second section is welded to the area of ​​the second channel plate 13 and the second channel plate 12 forming the first shell 1, the first reinforcing rib 183 can be used to increase the structural strength of the first shell 1, thereby ensuring the pressure-bearing capacity of the first shell 1 and ensuring the service life of the first shell 1.

[0076] Preferably, the first segment extends toward the side where the central hole 3 is located and is welded to the third shell plate 184 to increase the stability of the third shell plate 184.

[0077] In a preferred embodiment, refer to Figure 5 The second housing 2 has a second housing plate 285 extending circumferentially along the central hole 3, a third flow channel plate 23 is welded to the second housing plate 285, and a portion of the second housing plate 285 constitutes the channel wall of the airflow channel.

[0078] Understandably, the second shell plate 285 is located outside the third flow channel plate 23.

[0079] Since the third flow channel plate 23 is welded to the second housing 2, the stability of the third flow channel plate 23 is increased, thereby increasing the pressure bearing capacity of the third flow channel plate 23; and since a part of the second housing 2 constitutes the channel wall of the airflow channel, the volume of the housing in its own radial direction is further reduced, so as to further achieve the effect of facilitating the miniaturization design of the housing.

[0080] Furthermore, refer to Figure 4 The first flow channel plate 21, which constitutes the first-stage airflow channel 24, forms a part of the second housing 2. The second housing 2 also has three fourth housing plates. One fourth housing plate is located between the first-stage airflow channel 24 and the third-stage airflow channel 26. The intake pipe that constitutes the second-stage air inlet is welded to the fourth housing plate located between the first-stage airflow channel 24 and the third-stage air inlet channel. Another fourth housing plate is located between the second-stage airflow channel 25 and the fourth-stage airflow channel 27. The intake pipe that constitutes the third-stage air inlet is welded to the fourth housing plate located between the second-stage airflow channel 25 and the fourth-stage airflow channel 27. The remaining fourth housing plate is located on the side of the second-stage airflow channel 25 away from the first-stage airflow channel 24. The intake pipe that constitutes the fourth-stage air inlet is welded to the fourth housing plate located on the second-stage airflow channel 25 away from the first-stage airflow channel 24. The second housing 2 also has a fifth housing plate 286. The fifth housing plate 286 is located on the side of the second-stage airflow channel 25 away from the first-stage airflow channel 24 and is welded to the fourth housing plate away from the first-stage airflow channel 24.

[0081] This application does not specify the location of the air outlet pipes. They can be set in other locations as long as each air outlet pipe can be connected to its corresponding flow channel.

[0082] The better one is to refer to Figure 1 and Figure 2 The second shell 2 is provided with a second reinforcing rib 289 on its exterior. The second reinforcing rib 289 is welded to the fifth shell plate 286, the fourth shell plate, the second shell plate 285 and the first flow channel plate 21 that constitutes the first-stage airflow channel 24, so as to increase the structural strength of the second shell 2 and improve the pressure bearing capacity of the second shell 2.

[0083] In a preferred embodiment, refer to Figure 1 and Figure 2 The second housing 2 is provided with fixing claws 287. Multiple fixing claws 287 are arranged at intervals along the circumference of the second housing 2 to facilitate the installation of the housing to the required installation position.

[0084] Reference Figure 9 This application also discloses a horizontally split centrifugal compressor, which includes a rotor 4 and a housing as described above. The rotor 4 includes a main shaft 41 installed in a central hole 3 and an impeller 42 installed on the main shaft 41. The impeller 42 is configured to correspond to the guide channel and the airflow channel.

[0085] It is understandable that there are multiple impellers 42, and each impeller 42 corresponds to a different airflow channel.

[0086] Because the horizontally split centrifugal compressor in this application uses the aforementioned casing, the axial dimension of the casing in the central hole 3 and the radial dimension of the casing are reduced, thereby facilitating the miniaturization design of the horizontally split centrifugal compressor.

[0087] Furthermore, refer to Figure 9 Impeller 42 includes a first impeller and a second impeller. The blades of the first impeller and the first channel plate corresponding to the first impeller are located on the side of the first impeller away from the second impeller. The blades of the second impeller and the first channel plate corresponding to the second impeller are located on the side of the second impeller away from the first impeller.

[0088] It is understandable that when there are four airflow channels, there are four impellers 42, two of which are first impellers and the other two are second impellers.

[0089] Since the blades of the first impeller and the corresponding first channel plate are located on the side of the first impeller away from the second impeller, and the blades of the second impeller and the corresponding second channel plate are located on the side of the second impeller away from the first impeller, the main shaft 41 can be kept as balanced as possible in its own axial direction when the horizontally split centrifugal compressor is working, so as to ensure the working stability of the horizontally split centrifugal compressor.

[0090] The better one is to refer to Figure 9 The impeller 42 is fitted with a guide vane 5, at least a portion of which extends into the first gap and the second gap, so as to guide the gas using the guide vane 5 to improve the working efficiency of the horizontal split centrifugal compressor.

[0091] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0092] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0093] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A housing, characterized in that, The device includes a first housing (1) and a second housing (2) disposed opposite to the first housing (1). A central hole (3) for mounting a rotor (4) is formed between the first housing (1) and the second housing (2). The first housing (1) is welded with a first channel plate (11) extending axially spirally along the central hole (3), a second channel plate (12) extending circumferentially along the central hole (3), and a third channel plate (13) welded to the first channel plate (11) and the second channel plate (12). The first channel plate (11), the second channel plate (12), and the third channel plate (13) together form a flow channel. The space between the first channel plate (11) and the second channel plate (12) is... The distance gradually increases along the flow direction of the gas in the guide channel; the second housing (2) is welded with a first flow channel plate (21) extending circumferentially along the central hole (3), a second flow channel plate (22) extending circumferentially along the central hole (3), and a third flow channel plate (23) welded to the first flow channel plate (21) and the second flow channel plate (22). The first flow channel plate (21), the second flow channel plate (22), and the third flow channel plate (23) together form an airflow channel communicating with the guide channel. The distance between the third channel plate (13) and the central axis of the central hole (3) gradually increases along the flow direction of the gas in the airflow channel, and the gas enters the guide channel through the airflow channel.

2. The housing according to claim 1, characterized in that, The flow channel has an air inlet end, and the distance between the first channel plate (11) and the second channel plate (12) at the air inlet end is equal to the distance between the first flow channel plate (21) and the second flow channel plate (22).

3. The housing according to claim 1, characterized in that, The flow channel has an air outlet end. The second housing (2) is provided with a first plate (282), a second plate (283) arranged parallel to and spaced apart from the first plate (282), and a third plate (284) connected to the first plate (282) and the second plate (283). The first plate (282), the second plate (283), and the third plate (284) together form an air outlet cavity opposite to the air outlet end. The air outlet cavity is connected to the airflow channel, and the distance between the first plate (282) and the second plate (283) is equal to the distance between the first channel plate (11) and the second channel plate (12) at the air outlet end.

4. A housing according to any one of claims 1-3, characterized in that, The thickness of the third channel plate (13) is greater than the thickness of the first channel plate (11), and the third channel plate (13) constitutes a part of the first housing (1).

5. A housing according to claim 4, characterized in that, The first housing (1) has a first housing plate (181) located on the side of the first channel plate (11) away from the second channel plate (12), and the first housing plate (181) is welded to the third channel plate (13).

6. A housing according to claim 5, characterized in that, The flow guide channels are provided in multiple ways along the axial direction of the central hole (3). The thickness of the second channel plate (12) between two adjacent flow guide channels is greater than the thickness of the first channel plate (11), and a portion of the second channel plate (12) constitutes a portion of the first housing (1).

7. A housing according to claim 6, characterized in that, The exterior of the first housing (1) has a first reinforcing rib (183), the first reinforcing rib (183) has a first segment and a second segment, the first segment is welded to the first housing plate (181), and the second segment is welded to the area of ​​the third channel plate (13) and the second channel plate (12) that constitute the first housing (1).

8. A housing according to any one of claims 1-3, characterized in that, The second housing (2) has a second shell plate (285) extending circumferentially along the central hole (3), the third flow channel plate (23) is welded to the second shell plate (285), and a portion of the second shell plate (285) forms the channel wall of the airflow channel.

9. A horizontally split centrifugal compressor, characterized in that, The rotor (4) includes a rotor (4) and a housing as described in any one of claims 1-8, wherein the rotor (4) includes a main shaft (41) mounted in the central hole (3) and an impeller (42) mounted on the main shaft (41), the impeller (42) being disposed corresponding to the guide channel and the airflow channel.

10. A horizontally split centrifugal compressor according to claim 9, characterized in that, The impeller (42) includes a first impeller and a second impeller. The blades of the first impeller and the first channel plate (11) corresponding to the first impeller are both located on the side of the first impeller away from the second impeller. The blades of the second impeller and the first channel plate (11) corresponding to the second impeller are both located on the side of the second impeller away from the first impeller.

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