Split type volute assembly of centrifugal air compressor
By designing a split volute assembly, the high cost and low flexibility of existing centrifugal air compressors are solved, enabling convenient maintenance and rapid iterative design, and reducing the overall maintenance and R&D costs of the machine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-04-07
AI Technical Summary
The existing centrifugal air compressor has an integrated volute design, which results in high R&D costs, insufficient flexibility, and easy damage under harsh working conditions, leading to high maintenance costs.
The volute assembly is a split type, consisting of a wheel cover body and a volute body connected by threads and sealed with O-rings, which allows for detachable connection and facilitates individual replacement or modification of the volute part.
It reduced R&D and maintenance costs, improved design flexibility and airtightness, accelerated R&D speed, and reduced the frequency of complete machine replacement.
Smart Images
Figure CN224093582U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to centrifugal air compressor technical field, especially is a centrifugal air compressor split type volute assembly. BACKGROUND
[0002] The volute is one of the core aerodynamic components of the centrifugal air compressor, and its function is to recover the gas from the impeller, guide the gas to flow in a specific direction, and convert the kinetic energy of the gas into pressure energy. Most of the existing volutes are integrated cast volutes, which include the impeller inlet section, the wheel cover section, the vaneless diffuser section and the volute part. When developing a new model, the final aerodynamic structure needs to be determined by continuously iterating and optimizing the impeller, diffuser and volute through numerical simulation. However, the flow of gas inside the centrifugal air compressor is very complex, and it is difficult to obtain accurate results through numerical simulation, so the performance of the designed air compressor may deviate from the actual test results, even far from the expected. When the actual test performance is poor, the aerodynamic structure needs to be adjusted again and a prototype needs to be manufactured. Since the integrated volute is a casting process, scrapping and re-casting a new mold will result in high research and development costs and time loss. Moreover, the traditional air compressor impeller and volute are bound together, forming a "one machine one shell" design. When the air compressor needs to expand the application scenario and optimize the performance of the impeller, the flexibility is not enough. In addition, the air compressor impeller is prone to damage in harsh working conditions, which may cause the volute to be damaged by scratching the wheel cover or even breaking the blades. When replacing, the entire volute needs to be replaced, resulting in high cost. SUMMARY
[0003] Therefore, the purpose of the utility model is to provide a centrifugal air compressor split type volute assembly, which has the characteristics of simple structure, easy maintenance and fast iterative design optimization.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a centrifugal air compressor split type volute assembly, comprising a wheel cover main body, a volute main body and an O-ring; the volute inlet section is provided with an inner connecting piece, and the wheel cover main body is provided with an outer connecting piece; the inner connecting piece and the outer connecting piece are connected to enable the wheel cover main body and the volute main body to be detachably connected; the volute inlet section is provided with a boss, and the boss is provided with an O-ring groove; one side of the wheel cover main body facing the volute inlet section is provided with a groove; the O-ring groove and the groove of the wheel cover main body cooperate to form a space for accommodating the O-ring, so that the wheel cover main body and the volute main body are sealingly connected.
[0005] In a preferred embodiment, the wheel cover main body comprises an impeller inlet section, a wheel cover section and a vaneless diffuser section; the end of the vaneless diffuser section is provided with the outer connecting piece; one side of the vaneless diffuser section facing the volute main body is provided with the groove.
[0006] In a preferred embodiment, the volute body includes a volute inlet section, a volute inner flow channel, and a volute outlet section; the volute inlet section is provided with the inner connector; and the side of the volute inlet section facing the wheel cover body is provided with the O-ring groove.
[0007] In a preferred embodiment, the inner connector is specifically an internal thread, and the outer connector is specifically an external thread.
[0008] In a preferred embodiment, the impeller inlet section has a trumpet shape.
[0009] In a preferred embodiment, the volute inlet section is an annular structure.
[0010] In a preferred embodiment, the bladeless diffuser section is an annular structure constructed in proportion to the impeller outlet diameter and height, and it is an integral structure with the impeller cover section.
[0011] In a preferred embodiment, the flow channel area inside the volute varies circumferentially, and the cross-section is a circular asymmetric cross-section.
[0012] In a preferred embodiment, the volute outlet section has a circular cross-section with a gradually increasing cross-sectional area, guiding the gas into the next component.
[0013] In a preferred embodiment, the volute body is formed by die casting.
[0014] In a preferred embodiment, the wheel cover body structure is formed by machining.
[0015] Compared with existing technologies, this utility model has the following advantages: It features a simple structure, easy maintenance, high flexibility, and facilitates faster research and development while reducing costs. When design, damage, or compatibility issues arise with the impeller cover or volute body, it eliminates the need to replace the entire integrated volute; only manufacturing modifications or direct replacement of the corresponding impeller cover or volute body structure are required, making the process convenient and quick. The impeller cover and volute body are fixed by a threaded connection, with the grooved surface of the impeller cover engaging with the protruding surface of the volute body and sealed with an O-ring, ensuring the overall airtightness. The existing excellent impeller design can be retained, meaning the corresponding impeller cover structure remains unchanged, while modifying the volute body to adjust the operating range of the centrifugal air compressor. Through these methods, the research and development speed of centrifugal air compressors can be accelerated, and research and development costs and maintenance costs can be reduced. Simultaneously, the overall flexibility of the machine can be improved. Attached Figure Description
[0016] Fig. 1 This is a schematic diagram of the structural distribution of the split volute assembly of the centrifugal air compressor according to a preferred embodiment of the present invention;
[0017] Fig. 2This is a partially enlarged schematic diagram of the structural distribution of the split volute assembly of the centrifugal air compressor according to a preferred embodiment of the present invention. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0020] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0021] Centrifugal air compressor split volute assembly, reference Figs. 1-2 The system includes a wheel cover body 1, a volute body 2, and an O-ring 3. The volute inlet section 21 is provided with an inner connector, and the wheel cover body 1 is provided with an outer connector. The inner connector and the outer connector are connected to allow the wheel cover body 1 and the volute body 2 to be detachably connected. The volute inlet section 21 is provided with a boss 25, and the boss 25 has an O-ring groove 26. The side of the wheel cover body 1 facing the volute inlet section 21 has a groove 15. The O-ring groove 26 and the groove 15 of the wheel cover body 1 cooperate to form a space for accommodating the O-ring 3, thereby sealing the wheel cover body 1 and the volute body 2.
[0022] Specifically, the wheel cover body 1 includes an impeller inlet section 11, a wheel cover section 12, and a bladeless diffuser section 13; the end of the bladeless diffuser section 13 is provided with the external connector; the side of the bladeless diffuser section 13 facing the volute body 2 is provided with the groove 15.
[0023] Specifically, the volute body 2 includes a volute inlet section 21, a volute inner flow channel 22, and a volute outlet section 23; the volute inlet section 21 is provided with the inner connecting member; and the side of the volute inlet section 21 facing the wheel cover body 1 is provided with the O-ring groove 26.
[0024] Specifically, the inner connector has an internal thread 24, and the outer connector has an external thread 14.
[0025] Specifically, the impeller inlet section 11 has a trumpet-shaped design.
[0026] Specifically, the inlet section 21 of the volute is a ring structure.
[0027] Specifically, the bladeless diffuser section 13 is an annular structure constructed proportionally to the impeller outlet diameter and height, and it forms an integral structure with the impeller shroud section 12. The impeller shroud section 12 is a curved structure formed according to the impeller shape, and it forms an integral structure with the impeller inlet section 11.
[0028] Specifically, the area of the flow channel 22 inside the volute varies circumferentially, and the cross-section is a circular asymmetric cross-section.
[0029] Specifically, the volute outlet section 23 has a circular cross-section with a gradually increasing cross-sectional area, guiding the gas into the next component.
[0030] Specifically, the volute body 2 is formed by mold casting.
[0031] Specifically, the wheel cover body 1 is formed by machining.
[0032] The wheel cover body 1 is connected and fixed or disassembled with the internal thread 24 of the volute body 2 through the external thread 14 at the end of the bladeless diffuser section, realizing the function of separation and facilitating research and development, design and maintenance; the wheel cover body 1 forms a seal with the boss 25, O-ring groove 26 and O-ring 3 of the volute body 2 through the groove 15 at the end of the bladeless diffuser, ensuring the airtightness after being connected as a whole; the impeller inlet section 11, wheel cover section 12, bladeless diffuser section 13, volute inlet section 21, volute inner flow channel 22 and volute outlet section 23 together constitute the internal gas passage of the centrifugal air compressor.
Claims
1. A split-type volute assembly for a centrifugal air compressor, characterized in that, The device includes a wheel cover body, a volute body, and an O-ring. The volute body has an inner connector at its inlet end, and the wheel cover body has an outer connector. The inner and outer connectors are connected to allow the wheel cover body and the volute body to be detachably connected. The volute body has a boss at its inlet end, and the boss has an O-ring groove. The side of the wheel cover body facing the inlet end of the volute body has a groove. The O-ring groove and the groove of the wheel cover body cooperate to form a space to accommodate the O-ring, thus sealing the wheel cover body and the volute body together.
2. The centrifugal air compressor split-type volute assembly according to claim 1, characterized in that, The wheel cover body includes an impeller inlet section, a wheel cover section, and a bladeless diffuser section; the end of the bladeless diffuser section is provided with the external connector; the side of the bladeless diffuser section facing the volute body is provided with the groove.
3. The centrifugal air compressor split-type volute assembly according to claim 1, characterized in that, The volute body includes a volute body inlet end, a volute body inner flow channel, and a volute body outlet section; the volute body inlet end is provided with the inner connecting member; the side of the volute body inlet end facing the wheel cover body is provided with the O-ring groove.
4. The centrifugal air compressor split-type volute assembly according to claim 1, characterized in that, The inner connector is specifically an internal thread, and the outer connector is specifically an external thread.
5. The centrifugal air compressor split-type volute assembly according to claim 1, characterized in that, The impeller inlet section has a trumpet-shaped design.
6. A split-type volute assembly for a centrifugal air compressor according to claim 1, characterized in that, The inlet end of the volute body has a ring structure.
7. The centrifugal air compressor split-type volute assembly according to claim 5, characterized in that, The bladeless diffuser section is an annular structure constructed proportionally to the impeller outlet diameter and height, and it forms an integral part of the impeller shroud section.
8. The centrifugal air compressor split-type volute assembly according to claim 1, characterized in that, The flow channel area inside the volute varies circumferentially, and the cross-section is a circular asymmetric section.
9. The centrifugal air compressor split-type volute assembly according to claim 1, characterized in that, The outlet section of the volute has a circular cross-section with a gradually increasing cross-sectional area, guiding the gas into the next component.