Limiting structure and centrifugal compressor

Abstract

The disclosure provides a limiting structure and a centrifugal compressor, wherein the limiting structure comprises: a limiting block, which is formed with a connecting hole, a first matching wall and a second matching wall, the first matching wall is away from the second matching wall, the first matching wall is arranged towards a lower casing and / or a lower partition plate of the centrifugal compressor, and the second matching wall is used for abutting against an upper casing and an upper partition plate of the centrifugal compressor; a fastener, which is arranged in the connecting hole and is used for fastening and connecting the limiting block and the upper casing, in the case that the limiting block is fastened and connected to the upper casing through the fastener, the extension direction of the matching surface between the upper casing and the upper partition plate intersects with the second matching wall; wherein in a projection plane parallel to the first matching wall, the contour of the orthographic projection of the limiting block is circular.

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, and more particularly to a limiting structure and a centrifugal compressor. Background Technology

[0002] In related technologies, centrifugal compressors with horizontal split structures typically have a limiting screw at the bottom of the upper housing to fix the upper partition plate inside the upper housing. The head of the limiting screw supports the bottom of the upper partition plate, thereby preventing the upper partition plate from falling off the upper housing.

[0003] However, when the upper partition is heavy, the reliability of using only the head of the aforementioned limiting screw to limit the upper partition is poor, and the upper partition is prone to falling off, which is not conducive to ensuring the installation stability of the upper partition. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, a limiting structure is provided according to a first aspect of the present disclosure, comprising:

[0006] The limiting block has a connecting hole, a first mating wall and a second mating wall. The first mating wall is opposite to the second mating wall. The first mating wall is arranged towards the lower housing and / or lower partition of the centrifugal compressor. The second mating wall is used to abut against the upper housing and upper partition of the centrifugal compressor.

[0007] Fasteners, inserted through the connecting holes, are used to fasten the connecting limit block and the upper housing. When the limit block is fastened to the upper housing by the fasteners, the extending direction of the mating surface between the upper housing and the upper partition intersects with the second mating wall.

[0008] In the projection plane parallel to the first mating wall, the outline of the orthographic projection of the limiting block is circular.

[0009] In one feasible implementation, there are multiple connecting holes and multiple fasteners, and each connecting hole corresponds to a fastener.

[0010] In one feasible implementation, the limiting block is cylindrical, with a first mating wall formed at one axial end of the limiting block and a second mating wall formed at the other axial end of the limiting block.

[0011] In one feasible implementation, the axis of the connecting hole is parallel to the axis of the limiting block.

[0012] In one feasible implementation, multiple connecting holes are arranged at intervals along the circumference of the limiting block, and the multiple connecting holes are at the same position in the radial direction of the limiting block.

[0013] In one feasible implementation, the second mating wall includes:

[0014] The first and second arc-shaped walls are parallel to the first mating wall. The first arc-shaped wall is used to abut against the upper housing, and the second arc-shaped wall is used to abut against the upper partition.

[0015] Along the axial direction of the limiting block, the distance between the first arc-shaped wall and the first mating wall is greater than the distance between the second arc-shaped wall and the first mating wall.

[0016] In one feasible implementation, the bow height direction of the first bow-shaped wall is consistent with the bow height direction of the second bow-shaped wall, and the bow height of the first bow-shaped wall is greater than the bow height of the second bow-shaped wall.

[0017] In one feasible implementation, the ratio of the arc height of the second arcuate wall to the diameter of the limiting block is greater than or equal to 0.2 and less than or equal to 0.7; and / or

[0018] The ratio of the distance between the first arc-shaped wall and the first mating wall in the axial direction of the limiting block to the diameter of the limiting block is greater than or equal to 0.6 and less than or equal to 0.8.

[0019] In one feasible implementation, the fastener is a bolt or screw.

[0020] A centrifugal compressor is provided according to a second aspect of the present disclosure, comprising:

[0021] Upper casing;

[0022] Upper partition, located on the upper housing;

[0023] As in any of the first aspects mentioned above, the limiting structure has a second mating wall abutting against the upper housing and the upper partition, and the limiting block is fastened to the upper housing by fasteners. The extension direction of the mating surface between the upper housing and the upper partition intersects with the second mating wall.

[0024] The above description is merely an overview of the technical solution provided in this disclosure. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other features and effects of this disclosure more obvious and understandable, the following are specific examples of the implementation methods of this disclosure. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1This is a schematic structural diagram of a limiting structure according to an embodiment of the present disclosure;

[0027] Figure 2 A schematic structural diagram of a limiting block according to an embodiment of this disclosure;

[0028] Figure 3 for Figure 2 The diagram shows a schematic cross-sectional view of the limiting block along the AA direction.

[0029] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0030] 10' Upper housing; 11' First alignment notch; 20' Upper partition; 21' Second alignment notch; S1' Mating surface; S2' Split surface;

[0031] 100 limiting structure; 110 limiting block; 120 fastener;

[0032] 1101 Connecting hole; 1102 First mating wall; 1103 Second mating wall; 1103a First arcuate wall; 1103b Second arcuate wall. Detailed Implementation

[0033] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0034] It should be noted that in related technologies, centrifugal compressors with horizontally split structures typically use a limiting screw on the side of the upper housing corresponding to the split surface to secure the upper partition plate within the upper housing. The head of the limiting screw supports the upper partition plate on this side, preventing it from detaching from the housing. This side of the upper housing corresponding to the split surface is also the bottom of the housing; similarly, the side of the upper partition plate corresponding to the split surface is also the bottom of the upper partition plate. However, due to structural space limitations, the maximum size of the limiting screws that can be used in practical applications is limited. Therefore, when the upper partition plate is heavy, relying solely on the head of the limiting screw for positioning is unreliable, easily leading to the upper partition plate detaching and compromising its installation stability.

[0035] In view of this, such as Figures 1 to 3As shown, a limiting structure 100 is provided according to a first aspect of the present disclosure, comprising: a limiting block 110 having a connecting hole 1101, a first mating wall 1102 and a second mating wall 1103, the first mating wall 1102 being opposite to the second mating wall 1103, the first mating wall 1102 being arranged toward the lower housing and / or lower partition of the centrifugal compressor, and the second mating wall 1103 being abutting against the upper housing 10' and upper partition 20' of the centrifugal compressor; and a fastener 120 passing through the connecting hole 1101 for fastening the limiting block 110 and the upper housing 10', wherein when the limiting block 110 is fastened to the upper housing 10' by the fastener 120, the extending direction of the mating surface S1' between the upper housing 10' and the upper partition 20' intersects with the second mating wall 1103; wherein, in a projection plane parallel to the first mating wall 1102, the outline of the orthographic projection of the limiting block 110 is circular.

[0036] The limiting structure 100 provided in this embodiment includes the aforementioned limiting block 110 and the aforementioned fastener 120. The limiting block 110 has a first mating wall 1102 and a second mating wall 1103, which are opposite to each other. The first mating wall 1102 is arranged towards at least one of the lower housing and lower partition of the centrifugal compressor, and the second mating wall 1103 is used to abut against the upper housing 10' and upper partition 20' of the centrifugal compressor. In practical applications, the limiting block 110 can be arranged at the midpoint S2' of the centrifugal compressor, and the first mating wall 1102 can be arranged corresponding to the top end of at least one of the lower housing and lower partition, while the second mating wall 1103 can be arranged corresponding to the bottom end of the upper housing 10' and upper partition 20'. The limiting block 110 also has a connecting hole 1101, through which the fastener 120 passes. In practical applications, the fastener 120 can pass through the connecting hole 1101 and connect to the upper housing 10', so that the limiting block 110 is securely connected to the bottom end of the upper housing 10', thereby ensuring the relative position stability between the limiting structure 100 and the upper housing 10'. Correspondingly, when the limiting block 110 is securely connected to the upper housing 10' by the fastener 120, a portion of the second mating wall 1103 can abut against the upper housing 10', and a portion of the second mating wall 1103 can abut against the upper partition 20' of the centrifugal compressor. The extending direction of the mating surface S1' of the upper partition 20' and the upper housing 10' intersects with the second mating wall 1103, so that the limiting block 110 can abut against the upper partition 20'. The relative position between 0' and the upper housing 10' is constrained to prevent the upper partition 20' from sliding significantly along the extension direction of the aforementioned mating surface S1' under the action of gravity. Furthermore, given the limited maximum size of the fasteners 120 that can be installed on the upper housing 10', the contact area between the limiting structure 100 and the upper partition 20' is guaranteed by utilizing the contact engagement between the aforementioned second mating wall 1103 and the aforementioned upper partition 20'. This improves the support stability of the limiting structure 100 on the upper partition 20', making the limiting structure 100 more suitable for supporting the heavier upper partition 20'. It also improves the limiting reliability of the limiting structure 100 on the heavier upper partition 20', reduces the risk of the heavier upper partition 20' falling off the upper housing 10', and ensures the structural reliability and stability of the centrifugal compressor.

[0037] It should be noted that, as Figure 1As shown, in practical applications, the bottom end of the upper housing 10' and the bottom end of the upper partition 20' can be respectively provided with a first alignment notch 11' and a second alignment notch 21'. Both the first alignment notch 11' and the second alignment notch 21' are located close to the aforementioned mating surface S1', and can be joined to form a mounting groove. The shape of the mounting groove can be adapted to the shape of the aforementioned limiting block 110. The limiting block 110 can be placed within the aforementioned mounting groove, thereby allowing the limiting structure 100 to be located above the aforementioned dividing surface S2'. This avoids structural interference between the limiting structure 100 and the lower housing or lower partition during the assembly of the upper housing 10' and the lower housing, and the assembly of the upper partition 20' and the lower partition. This helps reduce the impact of the limiting structure 100 on the assembly operation of the centrifugal compressor. In this case, the second mating wall 110... 3. The upper housing 10' and the upper partition 20' can be abutted by contacting and engaging with the inner walls of the first alignment notch 11' and the second alignment notch 21'. Considering the reliability of the engagement between the limiting block 110 and the upper housing 10' and the upper partition 20', and to enhance the limiting effect of the limiting block 110 on the upper partition 20', at least one inner wall of the first alignment notch 11' and at least one inner wall of the second alignment notch 21' can be configured to be parallel to the aforementioned dividing surface S2'. Thus, a portion of the inner wall of the aforementioned mounting groove can be parallel to the aforementioned dividing surface S2'. The second mating wall 1103 can abut against the inner wall of the aforementioned mounting groove that is parallel to the dividing surface S2'. Based on this, the aforementioned mounting groove can be approximately columnar or platform-shaped. The first alignment notch 11' and the second alignment notch 21' can be two parts of the aforementioned mounting groove separated by the aforementioned mating surface S1'.

[0038] Accordingly, the limiting structure 100 provided in this embodiment of the present disclosure, by setting the outline of the orthographic projection of the limiting block 110 in the projection plane parallel to the first mating wall 1102 to be circular, can make the limiting block 110 suitable for installation in a mounting groove with a circular cross-section. For example, it can be installed in a mounting groove that is approximately cylindrical, frustum-shaped, or spherical. The diameter of the maximum cross-section of the aforementioned mounting groove is greater than or equal to the diameter of the orthographic projection of the aforementioned limiting block 110. Compared to mounting slots that are frustum-shaped or prism-shaped, mounting slots with a circular cross-section are easier to machine by drilling during the assembly of the upper housing 10' and the upper partition 20'. This reduces the machine tool requirements for the first alignment notch 11' and the second alignment notch 21' when machining the upper housing 10' and the upper partition 20', eliminating the need to create them during the pre-assembly forming process of the upper housing 10' and the upper partition 20'. In other words, the first alignment notch 11' and the second alignment notch 21' can be machined during the assembly of the upper housing 10' and the upper partition 20', thereby reducing the difficulty of machining the upper housing 10' and the upper partition 20' before assembly, improving the ease of use and installation of the limiting structure 100, and reducing the impact of the limiting structure 100 on the forming and machining costs of the centrifugal compressor's housing and partition. For example, during the assembly of the upper housing 10' and the upper partition 20', the upper housing 10' and the upper partition 20' can be pre-positioned, and then, according to the structural parameters of the limiting block 110 and the target installation position, the mounting grooves adapted to the aforementioned limiting block 110 can be opened at the corresponding positions of the upper housing 10' and the upper partition 20' by drilling.

[0039] It is understood that the aforementioned limiting block 110 may be generally cylindrical, frustum-shaped, or spherical.

[0040] It is understood that the aforementioned limiting block 110 and the aforementioned fastener 120 may be made of high-strength materials, for example, the limiting block 110 and the fastener 120 may be made of, but not limited to, steel.

[0041] like Figure 1 As shown, in some examples, fastener 120 is a bolt or screw.

[0042] In this technical solution, the fastener 120 can be a bolt or a screw. Based on the aforementioned configuration, the fastener 120 can be installed on the upper housing 10' via a threaded connection. Accordingly, the upper housing 10' can be provided with threaded holes for connecting the fastener 120 in practical applications, which helps to improve the connection strength between the limiting structure 100 and the upper housing 10', enhance the connection reliability between the limiting structure 100 and the upper housing 10', and provide a guarantee for the limiting block 110 to stably and reliably limit the upper partition 20'.

[0043] It is understandable that when the fastener 120 is a bolt or screw, the aforementioned connecting hole 1101 can be a countersunk hole. Thus, after the limiting structure 100 is installed, the head of the bolt or screw and part of the screw can be located in the aforementioned connecting hole 1101, and part of the screw can be located in the threaded hole of the upper housing 10'. This helps to reduce the space occupied by the limiting structure 100, improve the compactness of the limiting structure 100, and further reduce the impact of the limiting structure 100 on the space of the centrifugal compressor.

[0044] It is understood that the specifications of the aforementioned bolts or screws can be selected in practical applications by combining the weight of the upper partition 20' and the structural parameters of the upper housing 10' and the upper partition 20', and no further limitations are imposed here. For example, the aforementioned fastener 120 can be, but is not limited to, an M24 bolt or screw.

[0045] like Figure 2 As shown, in some examples, there are multiple connecting holes 1101 and multiple fasteners 120, and the connecting holes 1101 and fasteners 120 correspond one-to-one.

[0046] In this technical solution, the number of the aforementioned connecting holes 1101 and the number of the aforementioned fasteners 120 can both be multiple, and the connecting holes 1101 and the fasteners 120 can correspond one-to-one. Based on the aforementioned configuration, the limiting block 110 can be securely connected to the aforementioned upper housing 10' through multiple fasteners 120, which helps to further enhance the connection strength between the limiting structure 100 and the upper housing 10', improve the connection reliability between the limiting structure 100 and the upper housing 10', provide further assurance for the limiting block 110 to stably and reliably limit the upper partition 20', and help to further improve the adaptability of the limiting structure 100 to the heavier upper partition 20'.

[0047] For example, the number of connection holes 1101 and the number of fasteners 120 are 2, 3, or 4, etc.

[0048] like Figures 1 to 3 As shown, in some examples, the limiting block 110 is cylindrical, with a first mating wall 1102 formed at one axial end of the limiting block 110 and a second mating wall 1103 formed at the other axial end of the limiting block 110.

[0049] In this technical solution, the limiting block 110 can be cylindrical, and the first mating wall 1102 and the second mating wall 1103 can be formed at both ends of the limiting block 110 along its axial direction. Based on the aforementioned configuration, the limiting block 110 can have good structural stability and strength, forming the axial compressive strength of the limiting block 110. This is beneficial to further improve the limiting support effect of the limiting structure 100 on the heavier upper partition 20', and can also reduce the structural complexity of the limiting block 110, save the molding support cost of the limiting block 110, and thus reduce the usage cost of the limiting structure 100.

[0050] like Figure 1 As shown, in some examples, the axis of the connecting hole 1101 is parallel to the axis of the limiting block 110.

[0051] In this technical solution, the axial direction of the aforementioned connecting hole 1101 can be parallel to the axial direction of the limiting block 110, that is, the connecting hole 1101 can penetrate the limiting block 110 along the interval direction of the first mating wall 1102 and the second mating wall 1103. Based on the aforementioned configuration, the fastener 120 and the limiting block 110 can have a high axial consistency. Thus, when the fastener 120 is a screw or bolt and the axial tensile strength of the fastener 120 is constant, the axial bearing capacity of the limiting structure 100 can be improved. This can further enhance the limiting support effect of the limiting structure 100 on the upper partition 20', strengthen the adaptability of the limiting structure 100 to the heavier upper partition 20', and reduce the risk of the upper partition 20' falling off.

[0052] like Figure 2 As shown, in some examples, multiple connecting holes 1101 are arranged at intervals along the circumference of the limiting block 110, and the multiple connecting holes 1101 are in the same position in the radial direction of the limiting block 110.

[0053] In this technical solution, there can be multiple connecting holes 1101, and these multiple connecting holes 1101 can be spaced apart on the same circumference in the radial direction of the limiting block 110. Based on the aforementioned configuration, the limiting block 110 can be fastened to the aforementioned upper housing 10' by multiple fasteners 120, and the circumferential force uniformity of the limiting structure 100 during use can be relatively high, which can limit the connection strength between the limiting structure 100 and the upper housing 10', improve the connection reliability between the limiting structure 100 and the upper housing 10', and provide further assurance for the limiting block 110 to stably and reliably limit the upper partition 20'.

[0054] For example, multiple connecting holes 1101 are arranged at equal intervals along the circumference of the limiting block 110, which helps to further improve the uniformity of circumferential force on the limiting structure 100 during use.

[0055] like Figures 1 to 3As shown, in some examples, the second mating wall 1103 includes: a first arcuate wall 1103a and a second arcuate wall 1103b, both of which are parallel to the first mating wall 1102. The first arcuate wall 1103a is used to abut against the upper housing 10', and the second arcuate wall 1103b is used to abut against the upper partition 20'. The distance between the first arcuate wall 1103a and the first mating wall 1102 along the axial direction of the limiting block 110 is greater than the distance between the second arcuate wall 1103b and the first mating wall 1102.

[0056] In this technical solution, the second mating wall 1103 may include the aforementioned first arcuate wall 1103a and the aforementioned second arcuate wall 1103b. Based on the aforementioned configuration, in practical applications, the second mating wall 1103 can respectively abut against the aforementioned upper housing 10' and the aforementioned upper partition 20' using the first arcuate wall 1103a and the second arcuate wall 1103b, and a certain height difference can be formed between the first arcuate wall 1103a and the second arcuate wall 1103b. The position height of the second arcuate wall 1103b is less than the position height of the first arcuate wall 1103a. Thus, the aforementioned height difference can be used to provide a certain floating adjustment gap for the upper partition 20', absorbing the machining accuracy error or assembly error of the upper housing 10' or the upper partition 20', which is beneficial to improving the convenience of installation of the limiting structure 100 and reducing the installation difficulty of the limiting structure 100.

[0057] It is understandable that, such as Figure 2 As shown, based on the aforementioned configuration of this technical solution, the end of the limiting block 110 where the second mating wall 1103 is formed in the axial direction can be stepped. The orthographic projections of the first arcuate wall 1103a and the second arcuate wall 1103b on the first mating wall 1102 are both arcuate. The arcuate segments of the orthographic projection contours of the first arcuate wall 1103a and the arcuate segments of the orthographic projection contours of the second arcuate wall 1103b can be connected end to end along the circumference of the limiting block 110. The two arcuate segments can be spliced ​​together to form a circle. The chord segments of the orthographic projection contours of the first arcuate wall 1103a and the second arcuate wall 1103b can overlap, which is beneficial to further enhance the structural stability of the limiting block 110.

[0058] like Figure 2 As shown, in some examples, the bow height direction of the first arched wall 1103a is consistent with the bow height direction of the second arched wall 1103b, and the bow height of the first arched wall 1103a is greater than the bow height H2 of the second arched wall 1103b.

[0059] In this technical solution, the bow height direction of the first arched wall 1103a can be set to be consistent with the bow height direction of the second arched wall 1103b, and the bow height of the first arched wall 1103a can be set to be greater than the bow height H2 of the second arched wall 1103b. Based on the aforementioned settings, the area of ​​the portion of the first mating wall 1102 that abuts against the upper housing 10' can be relatively large, thereby enhancing the connection reliability between the limiting structure 100 and the upper housing 10', reducing the risk of the limiting structure 100 loosening relative to the upper housing 10', and providing favorable conditions for the limiting structure 100 to stably limit and support the upper partition 20'.

[0060] It is understandable that, based on the aforementioned configuration of this technical solution, the orthographic projection of the first arc-shaped wall 1103a onto the first mating wall 1102 can be a superior arc shape, and the orthographic projection of the second arc-shaped wall 1103b onto the first mating wall 1102 can be a inferior arc shape.

[0061] like Figure 2 and Figure 3 As shown, in some examples, the ratio of the arc height H2 of the second arcuate wall 1103b to the diameter D of the limiting block 110 is greater than or equal to 0.2 and less than or equal to 0.7; and / or the ratio of the distance H1 between the first arcuate wall 1103a and the first mating wall 1102 in the axial direction of the limiting block 110 to the diameter D of the limiting block 110 is greater than or equal to 0.6 and less than or equal to 0.8.

[0062] In this technical solution, the ratio of the arc height H2 of the second arcuate wall 1103b to the diameter D of the limiting block 110 can be set to be greater than or equal to 0.2 and less than or equal to 0.7. Based on the aforementioned setting, on the one hand, it can avoid the area of ​​the second arcuate wall 1103b being too small, thereby ensuring the contact area between the second arcuate wall 1103b and the upper partition 20', which can improve the limiting support effect of the second arcuate wall 1103b on the upper partition 20' and enhance the adaptability of the limiting structure 100 to the heavier upper partition 20'; on the other hand, it can also avoid the area of ​​the second arcuate wall 1103b being too large, thereby ensuring the contact area between the first arcuate wall 1103a and the upper housing 10', which can increase the... The connection reliability between the strong limiting structure 100 and the upper housing 10' is improved, reducing the risk of the limiting structure 100 loosening relative to the upper housing 10' and ensuring that the limiting structure 100 stably supports the upper partition 20'. On the other hand, it can also improve the stress effect of the limiting block 110 during use, preventing the limiting block 110 from overturning significantly under the pressure of the upper partition 20', which helps to prevent the fastener 120 from bending and deforming, thus ensuring the reliability and stability of the limiting structure 100.

[0063] In this technical solution, the ratio of the distance H1 between the first arc-shaped wall 1103a and the first mating wall 1102 in the axial direction of the limiting block 110 to the diameter D of the limiting block 110 can be set to be greater than or equal to 0.6 and less than or equal to 0.8. Based on the aforementioned configuration, on the one hand, it can avoid excessive axial drop between the first arcuate wall 1103a and the second arcuate wall 1103b, thereby preventing large-scale slippage of the upper partition 20' and ensuring the limiting constraint effect on the upper partition 20'. On the other hand, it can also avoid excessively small axial drop between the first arcuate wall 1103a and the second arcuate wall 1103b, thereby providing a certain floating adjustment gap for the upper partition 20', absorbing the machining accuracy error or assembly error of the upper housing 10' or the upper partition 20', which is beneficial to improving the convenience of installation of the limiting structure 100 and reducing the installation difficulty of the limiting structure 100. Furthermore, it can also ensure the structural reliability and structural strength of the limiting block 110, reduce the risk of structural deformation of the limiting block 110 under the pressure of the upper partition 20', provide a guarantee for the reliability and stability of the limiting structure 100, and ensure the limiting support effect of the limiting structure 100 on the upper partition 20'.

[0064] It is understandable that in this technical solution, the aforementioned ratio of the arc height H2 of the second arc-shaped wall 1103b to the diameter D of the limiting block 110 can be adopted simultaneously, as well as the aforementioned ratio of the distance H1 between the first arc-shaped wall 1103a and the first mating wall 1102 in the axial direction of the limiting block 110 to the diameter D of the limiting block 110. This greatly improves the reliability and stability of the limiting structure 100, ensures the limiting support effect of the limiting structure 100 on the upper partition 20', and enhances the adaptability of the limiting structure 100 to the heavier upper partition 20'.

[0065] It is understood that the aforementioned bow height refers to the length of the bow height line of the bow profile of the corresponding bow wall projected onto the first mating wall 1102. One end of the bow height line is perpendicular to the chord segment of the bow profile, and the other end is connected to the vertex of the arc segment of the bow profile.

[0066] Preferably, the ratio of the height H2 of the second arcuate wall 1103b to the diameter D of the limiting block 110 can be 0.25, and correspondingly, the ratio of the height of the first arcuate wall 1103a to the diameter D of the limiting block 110 can be 0.75; the ratio of the distance H1 between the first arcuate wall 1103a and the first mating wall 1102 in the axial direction of the limiting block 110 to the diameter D of the limiting block 110 can be 0.7.

[0067] According to a second aspect of the present disclosure, a centrifugal compressor is provided, comprising: an upper housing 10'; an upper partition 20' disposed on the upper housing 10'; a limiting structure 100 as described in any of the first aspects above, a second mating wall 1103 abutting against the upper housing 10' and the upper partition 20', a limiting block 110 being fastened to the upper housing 10' by fasteners 120, and the extending direction of the mating surface S1' between the upper housing 10' and the upper partition 20' intersecting with the second mating wall 1103.

[0068] The centrifugal compressor provided in this embodiment may include an upper housing 10', an upper partition 20', and a limiting structure 100 as proposed in any of the first aspects above; it is understood that the centrifugal compressor provided in this embodiment may be a horizontally split structure, and correspondingly, the aforementioned centrifugal compressor may also include a lower housing and a lower partition.

[0069] The aforementioned limiting structure 100 includes the aforementioned limiting block 110 and the aforementioned fastener 120. The aforementioned limiting block 110 has a first mating wall 1102 and a second mating wall 1103, which are opposite to each other. The first mating wall 1102 is positioned towards at least one of the lower housing and lower partition of the centrifugal compressor, and the second mating wall 1103 is positioned to abut against the upper housing 10' and upper partition 20' of the centrifugal compressor. In practical applications, the limiting block 110 can be positioned at the midpoint S2' of the centrifugal compressor, and the first mating wall 1102 can be positioned at the top of at least one of the lower housing and lower partition, while the second mating wall 1103 can be positioned at the bottom of the upper housing 10' and upper partition 20'. The limiting block 110 also has a connecting hole 1101, through which the fastener 120 passes. In practical applications, the fastener 120 can pass through the connecting hole 1101 and connect to the upper housing 10', so that the limiting block 110 is securely connected to the bottom end of the upper housing 10', thereby ensuring the relative position stability between the limiting structure 100 and the upper housing 10'. Correspondingly, when the limiting block 110 is securely connected to the upper housing 10' by the fastener 120, a portion of the second mating wall 1103 can abut against the upper housing 10', and a portion of the second mating wall 1103 can abut against the upper partition 20' of the centrifugal compressor. The extending direction of the mating surface S1' of the upper partition 20' and the upper housing 10' intersects with the second mating wall 1103, so that the limiting block 110 can abut against the upper partition 20'. The relative position between 0' and the upper housing 10' is constrained to prevent the upper partition 20' from sliding significantly along the extension direction of the aforementioned mating surface S1' under the action of gravity. Furthermore, given the limited maximum size of the fasteners 120 that can be installed on the upper housing 10', the contact area between the limiting structure 100 and the upper partition 20' is guaranteed by utilizing the contact engagement between the aforementioned second mating wall 1103 and the aforementioned upper partition 20'. This improves the support stability of the limiting structure 100 on the upper partition 20', making the limiting structure 100 more suitable for supporting the heavier upper partition 20'. It also improves the limiting reliability of the limiting structure 100 on the heavier upper partition 20', reduces the risk of the heavier upper partition 20' falling off the upper housing 10', and ensures the structural reliability and stability of the centrifugal compressor.

[0070] It should be noted that, as Figure 1As shown, in practical applications, the bottom end of the upper housing 10' and the bottom end of the upper partition 20' can be respectively provided with a first alignment notch 11' and a second alignment notch 21'. Both the first alignment notch 11' and the second alignment notch 21' are located close to the aforementioned mating surface S1', and can be joined to form a mounting groove. The shape of the mounting groove can be adapted to the shape of the aforementioned limiting block 110. The limiting block 110 can be placed within the aforementioned mounting groove, thereby allowing the limiting structure 100 to be located above the aforementioned dividing surface S2'. This avoids structural interference between the limiting structure 100 and the lower housing or lower partition during the assembly of the upper housing 10' and the lower housing, and the assembly of the upper partition 20' and the lower partition. This helps reduce the impact of the limiting structure 100 on the assembly operation of the centrifugal compressor. In this case, the second mating wall 110... 3. The upper housing 10' and the upper partition 20' can be abutted by contacting and engaging with the inner walls of the first alignment notch 11' and the second alignment notch 21'. Considering the reliability of the engagement between the limiting block 110 and the upper housing 10' and the upper partition 20', and to enhance the limiting effect of the limiting block 110 on the upper partition 20', at least one inner wall of the first alignment notch 11' and at least one inner wall of the second alignment notch 21' can be configured to be parallel to the aforementioned dividing surface S2'. Thus, a portion of the inner wall of the aforementioned mounting groove can be parallel to the aforementioned dividing surface S2'. The second mating wall 1103 can abut against the inner wall of the aforementioned mounting groove that is parallel to the dividing surface S2'. Based on this, the aforementioned mounting groove can be approximately columnar or platform-shaped. The first alignment notch 11' and the second alignment notch 21' can be two parts of the aforementioned mounting groove separated by the aforementioned mating surface S1'.

[0071] Accordingly, the limiting structure 100 provided in this embodiment of the present disclosure, by setting the outline of the orthographic projection of the limiting block 110 in the projection plane parallel to the first mating wall 1102 to be circular, can make the limiting block 110 suitable for installation in a mounting groove with a circular cross-section. For example, it can be installed in a mounting groove that is approximately cylindrical, frustum-shaped, or spherical. The diameter of the maximum cross-section of the aforementioned mounting groove is greater than or equal to the diameter of the orthographic projection of the aforementioned limiting block 110. Compared to mounting slots that are frustum-shaped or prism-shaped, mounting slots with a circular cross-section are easier to machine by drilling during the assembly of the upper housing 10' and the upper partition 20'. This reduces the machine tool requirements for the first alignment notch 11' and the second alignment notch 21' when machining the upper housing 10' and the upper partition 20', eliminating the need to create them during the pre-assembly forming process of the upper housing 10' and the upper partition 20'. In other words, the first alignment notch 11' and the second alignment notch 21' can be machined during the assembly of the upper housing 10' and the upper partition 20', thereby reducing the difficulty of machining the upper housing 10' and the upper partition 20' before assembly, improving the ease of use and installation of the limiting structure 100, and reducing the impact of the limiting structure 100 on the forming and machining costs of the centrifugal compressor's housing and partition. For example, during the assembly of the upper housing 10' and the upper partition 20', the upper housing 10' and the upper partition 20' can be pre-positioned, and then, according to the structural parameters of the limiting block 110 and the target installation position, the mounting grooves adapted to the aforementioned limiting block 110 can be opened at the corresponding positions of the upper housing 10' and the upper partition 20' by drilling.

[0072] It is understood that the aforementioned limiting block 110 may be generally cylindrical, frustum-shaped, or spherical.

[0073] It is understood that the aforementioned limiting block 110 and the aforementioned fastener 120 may be made of high-strength materials, for example, the aforementioned limiting block 110 and the aforementioned fastener 120 may be made of, but not limited to, steel.

[0074] Furthermore, since the centrifugal compressor provided in this embodiment includes the limiting structure 100 as proposed in any of the first aspects above, it possesses all the beneficial effects of the limiting structure 100, which will not be elaborated here.

[0075] In this disclosure, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0076] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0077] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0078] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A limiting structure, characterized in that, include: The limiting block has a connecting hole, a first mating wall and a second mating wall. The first mating wall is opposite to the second mating wall. The first mating wall is arranged toward the lower housing and / or lower partition of the centrifugal compressor. The second mating wall is used to abut against the upper housing and upper partition of the centrifugal compressor. Fasteners are inserted through the connecting holes to fasten the limiting block and the upper housing. When the limiting block is fastened to the upper housing by the fasteners, the extending direction of the mating surface between the upper housing and the upper partition intersects with the second mating wall. In the projection plane parallel to the first mating wall, the outline of the orthographic projection of the limiting block is circular. The limiting block is cylindrical, with the first mating wall formed at one axial end of the limiting block and the second mating wall formed at the other axial end of the limiting block. The axis of the connecting hole is parallel to the axis of the limiting block; The plurality of connecting holes are arranged at intervals along the circumference of the limiting block, and the plurality of connecting holes are in the same position in the radial direction of the limiting block; The second mating wall includes: A first arc-shaped wall and a second arc-shaped wall, both of which are parallel to the first mating wall, the first arc-shaped wall being used to abut against the upper housing, and the second arc-shaped wall being used to abut against the upper partition; Wherein, along the axial direction of the limiting block, the distance between the first arc-shaped wall and the first mating wall is greater than the distance between the second arc-shaped wall and the first mating wall; The bow height direction of the first bow-shaped wall is consistent with the bow height direction of the second bow-shaped wall, and the bow height of the first bow-shaped wall is greater than that of the second bow-shaped wall; The ratio of the height of the second arc-shaped wall to the diameter of the limiting block is greater than or equal to 0.2 and less than or equal to 0.7; and / or The ratio of the distance between the first arc-shaped wall and the first mating wall in the axial direction of the limiting block to the diameter of the limiting block is greater than or equal to 0.6 and less than or equal to 0.

8.

2. The limiting structure according to claim 1, characterized in that, Both the number of connecting holes and the number of fasteners are multiple, and each connecting hole corresponds to one fastener.

3. The limiting structure according to claim 1 or 2, characterized in that, The fastener is a bolt or screw.

4. A centrifugal compressor, characterized in that, include: Upper casing; Upper partition plate, disposed on the upper housing; According to any one of claims 1 to 3, the second mating wall abuts against the upper housing and the upper partition, the limiting block is fastened to the upper housing by the fastener, and the extending direction of the mating surface between the upper housing and the upper partition intersects with the second mating wall.

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