Volute chamber structure and assembling method

Abstract

When the volute chamber structure is used, the second end of the second shell plate is horizontally connected to the first shell plate in a lap joint mode, a rigid joint supporting each other is structurally formed, a high-rigidity box-like section is jointly formed, the scheme that in the prior art, the structural strength is guaranteed through material stacking is replaced, and after the plate thickness is reduced, the structural strength is improved. The whole volute chamber structure can still keep the non-deformability, the first shell plate is connected in a vertical state, the second shell plate is connected in a horizontal state, and therefore a complex contour is decomposed into two independent components with the clear main direction, thickness and structure optimization can be conducted according to actual stress of all the plates, and on the premise that the strength is met, the overall performance of the volute chamber is improved. Therefore, accurate thinning of the first shell plate and the second shell plate is realized, the material consumption and weight are directly reduced, the overall weight of the shell is further reduced, and lightweight design is realized. The invention further relates to an assembling method.

Description

Technical Field

[0001] This application relates to the field of welding housing assembly technology, and in particular to a volute structure and assembly method. Background Technology

[0002] In the field of large rotating machinery such as centrifugal compressors and blowers, the volute of a welded housing is a key pneumatic component. Traditional welded housing volute structures typically employ an integral volute or a single shell directly bent from thick sheet metal. While this integrated or simply formed design ensures structural strength, it has significant drawbacks: to meet the rigidity and pressure-bearing capacity required for the complex spatial curvature of the volute, it is often necessary to significantly increase the overall wall thickness of the shell and weld numerous reinforcing ribs externally. This directly results in excessive shell weight, high raw material consumption, and heavy and costly subsequent welding and machining work, making it difficult to adapt to the current trend of lightweight and low-cost equipment manufacturing.

[0003] Therefore, how to reduce the overall weight of the casing and achieve lightweight design is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] This application provides a volute structure and assembly method to reduce the overall weight of the casing and achieve lightweight design.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A volute structure includes a housing frame, a first outer shell plate, and a second outer shell plate, wherein: The first outer shell panel is connected to the housing frame in a first direction, and a first end of the first outer shell panel is connected to the housing frame; The second outer shell panel is connected to the housing frame in a second direction, and the first end of the second outer shell panel is connected to the housing frame, and the second end of the second outer shell panel is horizontally overlapped with the second end of the first outer shell panel; The first outer shell plate and the second outer shell plate together form the outer contour of the volute of the housing frame.

[0006] Optionally, in the above-described volute structure, the first outer shell plate includes a spiral outer shell plate, and the second outer shell plate includes an arc-shaped outer shell plate.

[0007] Optionally, in the above-described volute structure, the housing frame includes two side plates arranged opposite to each other, at least one intermediate end plate located between the two side plates, and vertical stiffening plates connected to the intermediate end plate and / or the side plates. The first end of the first outer shell plate is connected to the side plate, and the first end of the second outer shell plate is connected to the middle end plate.

[0008] Optionally, the above-described volute structure further includes a center-part flange, which is mated to the second outer shell plate at the center-part position of the second outer shell plate.

[0009] Optionally, in the above-described volute structure, the housing frame is an upper housing or a lower housing; When the housing frame is the upper housing or the lower housing, the center-part flange constitutes the closing surface of the housing frame.

[0010] Optionally, in the above-described volute structure, the weld connecting the first end of the first outer shell plate to the housing frame is constructed as a double-sided bevel; the weld connecting the first end of the second outer shell plate to the housing frame is constructed as a single-sided bevel.

[0011] The volute structure provided by this invention, in use, has the second end of the second outer shell plate horizontally overlapped with the first outer shell plate, forming a mutually supporting rigid node in the structure, together constituting a high-rigidity box-like cross-section. This replaces the existing technology's solution of material stacking to ensure structural strength, allowing the overall volute structure to maintain its deformation resistance even after the plate thickness is reduced. The first outer shell plate is connected vertically, and the second outer shell plate is connected horizontally, thereby decomposing the complex contour into two independent components with clear main directions. This allows for thickness and structural optimization for each plate based on its actual stress, enabling precise thinning of the first and second outer shell plates while meeting strength requirements. This directly reduces material usage and weight, thereby reducing the overall weight of the casing and achieving lightweight design.

[0012] This application also provides an assembly method for assembling the vortex structure as described in any of the above claims, including: Step S1, Collaborative unfolding and molding: Based on the three-dimensional structure of the volute structure, the first outer shell plate and the second outer shell plate are collaboratively unfolded in a parametric three-dimensional manner to generate two-dimensional unfolded models of the first outer shell plate and the second outer shell plate. Corresponding molding arc templates are made according to the two-dimensional unfolded models. The blanked plates are molded using the arc templates to obtain the first outer shell plate component and the second outer shell plate component respectively. Step S2, Sequential Positioning and Pre-assembly: Place the housing frame in a flat position. First, position the first outer shell panel component vertically to the housing frame. Then, horizontally overlap the second end of the second outer shell panel component with the second end of the first outer shell panel component and position it to the housing frame. Step S3, Welding: The weld between the first end of the first outer shell plate component and the housing frame is welded using a double-sided bevel; the weld between the first end of the second outer shell plate component and the housing frame is welded using a single-sided bevel.

[0013] Optionally, in the above assembly method, step S4 is further included between step S1 and step S2: positioning and spot welding the two relatively arranged side plates, at least one intermediate end plate, and the center flange; assembling and spot welding the vertical stiffening plates between the two side plates and the intermediate end plate to form the housing frame.

[0014] Optionally, in the above assembly method, in step S3, the welding sequence is as follows: first weld the weld between the first end of the first outer shell plate component and the housing frame, and then weld the weld between the first end of the second outer shell plate component and the housing frame.

[0015] Optionally, in the above assembly method, after step S3, there is also an assembly step S5 for the air duct at the volute outlet. The volute outlet is formed by the first outer shell plate, the second outer shell plate, and the end of the housing frame. The air duct includes an upper section, a transition plate, and a lower section. Step S5 includes: Step S51: Assemble the upper section of the air duct: Assemble the multiple side uprights that make up the upper section of the air duct around the outline of the volute outlet, and weld the inner joints between the multiple side uprights. Step S52: Assemble the transition plate: Assemble the transition plate with the upper section of the air duct, and weld the outer joint of the upper section of the air duct and the weld between the transition plate and the upper section of the air duct; Step S53: Connect the lower section of the air duct: Weld the transition plate to the lower section of the air duct.

[0016] The assembly method provided by the present invention is used to assemble the volute structure as described in any of the above embodiments. The specific structure of the volute structure is as described in the above embodiments. Since the assembly method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. Attached Figure Description

[0017] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort. One or more embodiments are illustrated by way of example through the corresponding images in the accompanying drawings. These exemplary descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0018] Figure 1 This is a schematic diagram of the overall structure of the vortex structure provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the ventilation duct provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the first and second outer shell plates provided in the embodiments of this application; Figure 4 This is a schematic diagram of the housing frame provided in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: First outer shell plate 100, second outer shell plate 200, side plate 300, middle end plate 400, vertical stiffener plate 500, center split flange 600, upper section of air duct 700, transition plate 800, lower section of air duct 900. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0022] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0023] See Figures 1-4 This application provides a volute structure, including a housing frame, a first outer shell plate 100, and a second outer shell plate 200. The first outer shell plate 100 is connected to the housing frame in a first direction, and a first end of the first outer shell plate 100 is connected to the housing frame. The second outer shell plate 200 is connected to the housing frame in a second direction, and a first end of the second outer shell plate 200 is connected to the housing frame. The second end of the second outer shell plate 200 is horizontally overlapped with the second end of the first outer shell plate 100. The first outer shell plate 100 and the second outer shell plate 200 together constitute the outer contour of the volute of the housing frame.

[0024] Specifically, the first direction is preferably vertical, and the second direction is preferably horizontal. The first outer shell plate 100 and the second outer shell plate 200 are connected and horizontally overlapped by the above-mentioned directional connection, and together they form a continuous outer profile of the volute.

[0025] Specifically, the assembly gap at the joint between the first outer shell panel 100 and the second outer shell panel 200 is less than 2 mm, and the edge misalignment is less than 2 mm.

[0026] The volute structure provided by this invention, in use, has the second end of the second outer shell plate 200 horizontally overlapped with the first outer shell plate 100, forming a mutually supporting rigid node in the structure, together constituting a high-rigidity box-like cross section. This replaces the existing technology's solution of material stacking to ensure structural strength, allowing the overall volute structure to maintain its deformation resistance even after the plate thickness is reduced. The first outer shell plate 100 is connected vertically, and the second outer shell plate 200 is connected horizontally, thereby decomposing the complex contour into two independent components with clear main directions. This allows for thickness and structural optimization for each plate based on its actual stress, achieving precise thinning of the first outer shell plate 100 and the second outer shell plate 200 while meeting strength requirements. This directly reduces material usage and weight, thereby reducing the overall weight of the casing and achieving lightweight design.

[0027] To optimize the above technical solution, the first outer shell plate 100 includes a spiral outer shell plate, and the second outer shell plate 200 includes an arc-shaped outer shell plate.

[0028] Specifically, a spiral outer casing plate refers to a surface whose working surface follows a specific logarithmic spiral or Archimedean spiral. The spiral outer casing plate is arranged vertically, meaning that the generatrix of its helical surface is approximately perpendicular to the mounting base. In a compressor, the core function of the spiral outer casing plate is to form a gradually expanding flow channel cross-section, effectively converting the kinetic energy of the high-speed airflow output from the impeller into pressure energy. The spiral shape of the outer casing plate ensures the conservation of airflow angular momentum, achieving efficient diffusion.

[0029] Specifically, the arc-shaped outer shell plate refers to a curved surface whose working surface is composed of one or more arc segments. The arc-shaped outer shell plate is arranged horizontally, indicating that the arc surface is approximately parallel to the mounting base surface. The arc-shaped outer shell plate mainly covers the top of the flow channel, forming a complete trapezoidal or rectangular flow channel cross-section together with the spiral outer shell plate. The functions of the arc-shaped outer shell plate are twofold: first, to seal the flow channel; and second, to withstand the static and dynamic pressure of the gas inside the flow channel.

[0030] In use, the spiral outer shell guides the airflow to rotate and diffuse, while the arc-shaped outer shell covers it to form the top of a closed flow channel. The airflow pressure acts on both the spiral and arc-shaped outer shells simultaneously, and the force and deformation are coordinated through the horizontal overlapping boundary, thereby achieving a lightweight volute structure while meeting specific aerodynamic performance requirements.

[0031] To optimize the above technical solution, the housing frame includes two side plates 300 arranged opposite to each other, at least one intermediate end plate 400 located between the two side plates 300, and a vertical stiffener plate 500 connected to the intermediate end plate 400 and / or the side plates 300. The first end of the first outer shell plate 100 is connected to the side plate 300, and the first end of the second outer shell plate 200 is connected to the intermediate end plate 400.

[0032] Specifically, the two side plates 300 are located at the axial ends of the volute structure, forming the longitudinal boundary of the housing frame, and are used to provide axial positioning reference and end support for the entire volute structure. At least one intermediate end plate 400 is located between the two side plates 300, and is used to provide internal lateral support. The intermediate end plate 400 can strengthen the internal space of the volute structure, ensure the stability of the thin-walled first outer shell plate 100 and the second outer shell plate 200 under pressure. At the same time, the intermediate end plate 400 provides a central support point for the second outer shell plate 200. The first end of the second outer shell plate 200 is connected to the intermediate end plate 400, so that the span of the second outer shell plate 200 is shortened by the intermediate end plate 400, thereby reducing its bending deformation under gas pressure, thus realizing the thin plate design. The vertical stiffening plate 500 is welded between the side plate 300 and / or the intermediate end plate 400. Its function is to strengthen the out-of-plane rigidity of the casing frame itself. The vertical stiffening plate 500 can act like a rib to prevent the large flat plates such as the side plate 300 and the intermediate end plate 400 from warping or vibrating, ensuring that the casing frame as an integral foundation has sufficient rigidity and providing a foundation for the precise installation of the first outer shell plate 100 and the second outer shell plate 200.

[0033] The first end of the first outer shell plate 100 is connected to the side plate 300, so that the helical surface is firmly fixed at both ends of the axial direction. The first end of the second outer shell plate 200 is connected to the middle end plate 400, so that the second outer shell plate 200 is stably supported. The force of the first outer shell plate 100 is directed to the solid side plate 300, and the force of the second outer shell plate 200 is directed to the internal lateral support (middle end plate 400). In this way, different types of loads have their own transmission paths, avoiding stress concentration and allowing each component to be thinned in its optimal direction, thereby reducing the overall weight of the casing and realizing lightweight design.

[0034] To optimize the above technical solution, the volute structure also includes a center-part flange 600, which is connected to the second outer shell plate 200 at the center-part position of the second outer shell plate 200.

[0035] Specifically, the center-split flange 600 is a structural connector. Through butt welding with the second outer shell plate 200, it provides reinforcement along the interface direction to the arc-shaped outer shell plate at the top of the volute, improving the local stiffness and strength of this area. At the same time, the two precision-machined planes of the center-split flange 600 serve as the mating surfaces of the upper and lower casings, respectively, to ensure the final assembly accuracy, alignment, and gas tightness of the mating surfaces of the unit.

[0036] During operation, when the upper and lower housings are joined by bolts, the bolt preload is transmitted through the split flange 600 and partially converted into compressive stress on the welded joint. Simultaneously, the pressure inside the housing frame tends to cause the upper and lower housings to separate; this tension is also borne by the split flange 600 and its weld to the outer shell plate. The entire volute structure is rigidly connected to the split flange 600 via the second outer shell plate 200, and is "suspended" or "supported" by the split flange 600, forming a complete upper or lower pressure boundary.

[0037] To optimize the above technical solution, the housing frame can be an upper housing or a lower housing. When the housing frame is an upper housing or a lower housing, the split flange 600 forms the closing surface of the housing frame.

[0038] Specifically, when this structure serves as the upper casing, its operation is as follows: On the assembly line, the upper casing component is hoisted onto the lower casing, on which the rotor has already been installed. At this time, the lower plane of the split flange 600 serves as the closing surface, tightly fitting against the upper plane of the lower casing flange. Operators insert themselves and tighten the closing bolts, pressing the upper and lower flanges together to form a seal and achieve precise alignment. In this state, the first outer shell plate 100 and the second outer shell plate 200 inside the upper casing, together with the corresponding parts of the lower casing, form a complete circular impeller cavity and a spiral volute flow channel. During operation, the internal high-pressure gas acts on all inner surfaces of the upper casing.

[0039] When this structure is used as the lower housing, the working process is similar. The lower housing is first placed on the support base, where the upper surface of the split flange 600 becomes the closing surface, which is used to support the upper housing.

[0040] The overlapping structure of the first outer shell 100 and the second outer shell 200 exists independently in their respective upper or lower halves. After being closed, the overlapping boundary of the upper and lower shells is continuous in space, which together ensures the accuracy of the complete flow channel profile.

[0041] To optimize the above technical solution, the connection weld between the first end of the first outer shell plate 100 and the housing frame is constructed with a double-sided bevel, and the connection weld between the first end of the second outer shell plate 200 and the housing frame is constructed with a single-sided bevel.

[0042] Specifically, at the connection between the first end of the first outer shell plate 100 and the side plate 300, the weld is usually in an easily accessible position when the casing is assembled flat. Welders can approach the weld from both the inner and outer sides of the structure. Therefore, a double-sided bevel (such as a K-type or X-type bevel) is designed to allow for symmetrical welding on both sides. During welding, heat is input alternately or simultaneously from both sides, and the resulting thermal stress and shrinkage deformation can cancel each other out, thereby minimizing angular deformation and warping caused by welding to ensure the verticality of the first outer shell plate 100 and the overall flow channel dimensions. At the connection between the first end of the second outer shell plate 200 and the middle end plate 400, in the assembled state, the weld is often blocked on one side by other structures (such as the casing frame itself or internal stiffeners) or is in a narrow space, making it possible to weld from only one side. Therefore, it is designed with a single-sided bevel (such as a V-type or U-type bevel).

[0043] In some embodiments, the first outer shell plate 100 has a double-sided K-shaped bevel with a blunt edge of 2 mm and a gap of 2 mm, and the second outer shell plate 200 has a single-sided V-shaped bevel with a blunt edge of 2 mm and a gap of 2 mm.

[0044] By taking into account the differences in accessibility of different spatial locations during installation, double-sided bevels and single-sided bevels are used in a differentiated manner. This approach aims to minimize welding deformation to ensure accuracy when possible (when installing the first outer shell plate 100), while ensuring that welding operations can actually be carried out under limited conditions (when installing the second outer shell plate 200). This achieves the best balance between welding deformation control and operational feasibility.

[0045] This application also provides an assembly method for assembling a vortex structure as described above, comprising: Step S1, Collaborative Deployment and Molding: Based on the three-dimensional structure of the volute structure, the first outer shell plate 100 and the second outer shell plate 200 are collaboratively deployed in a parametric three-dimensional layout to generate two-dimensional unfolded models of the first outer shell plate 100 and the second outer shell plate 200. Corresponding molding arc templates are made according to the two-dimensional unfolded models. The blanked plates are shaped using the arc templates to obtain the first outer shell plate 100 component and the second outer shell plate 200 component respectively. Step S2, Sequential Positioning and Pre-assembly: Place the housing frame in a flat position. First, position the first outer shell panel 100 component vertically with the housing frame. Then, horizontally overlap the second end of the second outer shell panel 200 component with the second end of the first outer shell panel 100 component and position it with the housing frame. Step S3, Welding: The weld between the first end of the first outer shell plate 100 component and the housing frame is welded using a double-sided bevel; the weld between the first end of the second outer shell plate 200 component and the housing frame is welded using a single-sided bevel.

[0046] Specifically, the first outer shell plate 100 and the second outer shell plate 200 are collaboratively parametrically unfolded and laid out to ensure that the two-dimensional blanking dimensions of the first outer shell plate 100 and the second outer shell plate 200 can theoretically accurately reproduce their three-dimensional overlapping relationship. The corresponding forming arc template can convert digital precision into physical precision. A rolling template is made for the first outer shell plate 100 and a forming template is made for the second outer shell plate 200. Operators use these special templates to form the plates on a rolling machine or press and check the curvature with the templates in real time, thereby batch replicating the first outer shell plate 100 component and the second outer shell plate 200 component that match the design model.

[0047] To optimize the above technical solution, step S4 is also included between step S1 and step S2: positioning and spot welding the two relatively arranged side plates 300, at least one intermediate end plate 400 and the split flange 600; assembling and spot welding the vertical stiffening plate 500 between the two side plates 300 and the intermediate end plate 400 to form the casing frame.

[0048] To optimize the above technical solution, in step S3, the welding sequence is as follows: first weld the weld between the first end of the first outer shell plate 100 component and the housing frame, and then weld the weld between the first end of the second outer shell plate 200 component and the housing frame.

[0049] Specifically, the weld between the first outer shell plate 100 and the housing frame is a double-sided bevel. Furthermore, when the first outer shell plate 100 is laid flat, its connection with the side plate 300 is relatively strong. When this weld is performed first, the shrinkage deformation caused by the welding heat is mainly constrained by the strong rigidity of the frame, resulting in relatively small and controllable deformation. The weld between the second outer shell plate 200 and the housing frame is a single-sided bevel. This weld is performed after the weld of the first outer shell plate 100 has cooled down. That is, when one end (lap end) of the second outer shell plate 200 has already lapped onto the firmly welded and stable first outer shell plate 100, and its other end (the end to be welded) is butt-jointed with the intermediate end plate 400, this single-sided bevel weld can be performed. This process, by optimizing the welding sequence, achieves effective control over the lap joint accuracy.

[0050] To optimize the above technical solution, step S3 is followed by step S5, which involves assembling the air duct at the volute outlet. The volute outlet is formed by the first outer shell plate 100, the second outer shell plate 200, and the end of the casing frame. The air duct includes an upper section 700, a transition plate 800, and a lower section 900. Step S5 includes: Step S51: Assemble the upper section 700 of the air duct: Assemble the multiple side uprights that make up the upper section 700 of the air duct around the outline of the volute outlet, and weld the inner joints between the multiple side uprights. Step S52: Assemble the transition plate 800: Assemble the transition plate 800 with the upper section 700 of the air duct, and weld the outer joint of the upper section 700 of the air duct and the weld between the transition plate 800 and the upper section 700 of the air duct. Step S53, Connect the lower section 900 of the air duct: Weld the transition plate 800 to the lower section 900 of the air duct.

[0051] Specifically, the upper section 700 of the air duct is composed of multiple side uprights to conform to the outline of the volute outlet. In use, these uprights are placed and positioned one by one around the volute outlet, adjusted to ensure good fit with the end edges of the first outer shell plate 100, the second outer shell plate 200, and the casing frame. After positioning, the inner seams between the multiple side uprights are welded, while the outer seams are temporarily left free. After the inner seams of the upper section 700 are completed, the transition plate 800 connecting the upper section 700 and the lower section 900 is installed. Then, the outer seams of the upper section 700 and the weld between the transition plate 800 and the upper section 700 are welded. At this stage, welding the outer seams of the upper section 700 enhances structural stability and makes deformation more controllable, as the inner seams are already welded. Simultaneously, the connecting welds to the transition plate 800 are welded to securely connect the upper section 700 and the transition plate 800. Finally, the transition plate 800 is welded to the lower section 900 of the air duct, completing the assembly of the entire connection channel from the volute outlet to the external pipeline.

[0052] It should be noted that the volute structure and assembly method provided by this invention can be used in the field of welded housing assembly technology or other fields. Other fields refer to any field other than the field of welded housing assembly technology. The above are merely examples and do not limit the application areas of the volute structure and assembly method provided by this invention.

[0053] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0054] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0055] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vortex chamber structure, characterized in that, Includes a housing frame, a first outer shell plate, and a second outer shell plate, wherein: The first outer shell panel is connected to the housing frame in a first direction, and a first end of the first outer shell panel is connected to the housing frame; The second outer shell panel is connected to the housing frame in a second direction, and the first end of the second outer shell panel is connected to the housing frame, and the second end of the second outer shell panel is horizontally overlapped with the second end of the first outer shell panel; The first outer shell plate and the second outer shell plate together form the outer contour of the volute of the housing frame.

2. The vortex structure according to claim 1, characterized in that, The first outer shell plate includes a spiral outer shell plate, and the second outer shell plate includes an arc-shaped outer shell plate.

3. The vortex structure according to claim 1 or 2, characterized in that, The housing frame includes two side plates arranged opposite each other, at least one intermediate end plate located between the two side plates, and vertical stiffening plates connected to the intermediate end plate and / or the side plates; The first end of the first outer shell plate is connected to the side plate, and the first end of the second outer shell plate is connected to the middle end plate.

4. The vortex structure according to claim 3, characterized in that, It also includes a center-split flange, which is mated to the second outer shell plate at the center-split position of the second outer shell plate.

5. The vortex structure according to claim 4, characterized in that, The housing frame is an upper housing or a lower housing; When the housing frame is the upper housing or the lower housing, the center-part flange constitutes the closing surface of the housing frame.

6. The vortex structure according to any one of claims 1 to 5, characterized in that, The weld connecting the first end of the first outer shell plate to the housing frame is constructed with a double-sided bevel; the weld connecting the first end of the second outer shell plate to the housing frame is constructed with a single-sided bevel.

7. An assembly method, characterized in that, For assembling the volute structure as described in any one of claims 1 to 6, comprising: Step S1, Collaborative unfolding and molding: Based on the three-dimensional structure of the volute structure, the first outer shell plate and the second outer shell plate are collaboratively unfolded in a parametric three-dimensional manner to generate two-dimensional unfolded models of the first outer shell plate and the second outer shell plate. Corresponding molding arc templates are made according to the two-dimensional unfolded models. The blanked plates are molded using the arc templates to obtain the first outer shell plate component and the second outer shell plate component respectively. Step S2, Sequential Positioning and Pre-assembly: Place the housing frame in a flat position. First, position the first outer shell panel component vertically to the housing frame. Then, horizontally overlap the second end of the second outer shell panel component with the second end of the first outer shell panel component and position it to the housing frame. Step S3, Welding: The weld between the first end of the first outer shell plate component and the housing frame is welded using a double-sided bevel; the weld between the first end of the second outer shell plate component and the housing frame is welded using a single-sided bevel.

8. The assembly method according to claim 7, characterized in that, The step between step S1 and step S2 also includes step S4: positioning and spot welding the two relatively arranged side plates, at least one intermediate end plate, and the center flange; assembling and spot welding the vertical stiffening plates between the two side plates and the intermediate end plate to form the housing frame.

9. The assembly method according to claim 7 or 8, characterized in that, In step S3, the welding sequence is as follows: first weld the weld between the first end of the first outer shell panel component and the housing frame, and then weld the weld between the first end of the second outer shell panel component and the housing frame.

10. The assembly method according to claim 7, characterized in that, Following step S3, the assembly step S5 of the air duct at the volute outlet is further included. The volute outlet is formed by the first outer shell plate, the second outer shell plate, and the end of the housing frame. The air duct includes an upper section, a transition plate, and a lower section. Step S5 includes: Step S51: Assemble the upper section of the air duct: Assemble the multiple side uprights that make up the upper section of the air duct around the outline of the volute outlet, and weld the inner joints between the multiple side uprights. Step S52: Assemble the transition plate: Assemble the transition plate with the upper section of the air duct, and weld the outer joint of the upper section of the air duct and the weld between the transition plate and the upper section of the air duct; Step S53: Connect the lower section of the air duct: Weld the transition plate to the lower section of the air duct.

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