Mounting structure between diffuser and volute

Abstract

The utility model provides a mounting structure between a diffuser and a volute, which comprises the diffuser and the volute, external threads are arranged on the diffuser, internal threads are arranged on the side wall of an inner hole of the volute, the diffuser is arranged on the volute, and the diffuser and the volute are connected through matching of the external threads and the internal threads. According to the installation structure between the diffuser and the volute, the diffuser is provided with the external threads, the inner hole of the volute is provided with the internal threads, the diffuser is installed in the volute, and the diffuser and the volute are connected through the external threads and the internal threads, so that the problem that in the prior art, the diffuser and the volute are assembled through screws, and the assembly efficiency is high is effectively solved. And after the diffuser is assembled, the working surface of a diffuser plate is uneven, so that the flow loss and the efficiency reduction are caused. And meanwhile, the diffuser and the volute are assembled without other parts, so that the assembly complexity between the diffuser and the volute is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of superchargers, in particular to a mounting structure between a diffuser and a volute. Background Art

[0002] At present, superchargers using vane diffusers are widely used in engines. This type of supercharger is composed of a certain number of guide vanes evenly distributed along the circumference on the parallel and smooth wall of the vaneless diffuser. The main function of the vane diffuser is to introduce the gas compressed by the impeller into the volute in the direction of the guide vanes to achieve the purpose of controlling the air flow speed and output pressure. When working, the air flow flows into the vane diffuser at a certain angle. Due to the restriction of the guide vanes on the air flow, the gas must flow in the direction of the guide vanes, so the flow condition is better, the flow loss is small, and the efficiency is high. When operating under the design working conditions, the vane diffuser is 3% to 5% more efficient than the vaneless diffuser.

[0003] In the prior art, the diffuser 2 including blades (i.e., guide vanes) and the volute 1 are generally mounted and connected by a plurality of mounting screws 3, such as Figure 1 As shown; however, the installation structure has the following problems: first, there are many installation parts, and the diffuser needs to be fixed to the compressor volute by multiple installation screws; second, holes for assembling the installation screws are provided on the diffuser, and after the installation screws are screwed in, an uneven surface will still be formed on the surface of the diffuser disc, causing flow loss and reducing efficiency.

[0004] In summary, there is an urgent need for a mounting structure between a diffuser and a volute to solve the problems existing in the prior art. Utility Model Content

[0005] The utility model aims to provide a mounting structure between a diffuser and a volute, aiming to solve the problem that the diffuser is assembled on the volute by mounting screws, there are many mounting parts and the surface of the diffuser plate is uneven. The specific technical solution is as follows:

[0006] A mounting structure between a diffuser and a volute comprises a diffuser and a volute, wherein the diffuser is provided with an external thread, and an inner hole side wall of the volute is provided with an internal thread. The diffuser is arranged on the volute and the connection between the two is achieved by the cooperation of the external thread and the internal thread.

[0007] Preferably in the above technical solution, the diffuser includes a connecting cylinder and a diffuser plate arranged at one end of the connecting cylinder, the circumferential outer wall of the connecting cylinder is provided with an external thread, the volute is sequentially provided with a flange mounting cavity and a cylinder mounting cavity, and the circumferential inner wall of the cylinder mounting cavity is provided with an internal thread; after the diffuser is installed in the volute, the diffuser plate is placed in the flange mounting cavity, the connecting cylinder is placed in the cylinder mounting cavity, and the external thread and the internal thread are connected together.

[0008] Preferably, the above technical solution also includes an elastic sealing ring, which is arranged between the end surface of the connecting cylinder and the end surface of the cylinder installation cavity; after the diffuser is installed in the volute, the elastic sealing ring undergoes elastic compression deformation along the axial direction of the diffuser.

[0009] Preferably in the above technical solution, the elastic sealing ring is a rubber sealing gasket.

[0010] Preferably in the above technical solution, after the diffuser is installed in the volute, the circumferential inner wall of the connecting cylinder, the circumferential inner wall of the working flow channel section in the volute and the circumferential inner wall of the elastic sealing ring are flush, and the working surface of the diffuser plate is flush with the working surface of the diffuser flow channel section in the volute.

[0011] Preferably in the above technical solution, a plurality of guide vanes are evenly distributed along the circumferential direction on the working surface of the diffuser disc.

[0012] Preferably in the above technical solution, the connecting cylinder and the diffuser plate are integrally formed.

[0013] Preferably in the above technical solution, an arc transition connection is adopted between the inner wall of the connecting cylinder and the working surface of the diffuser plate.

[0014] Preferably in the above technical solution, the junction between the inner wall of the connecting cylinder and the working surface of the diffuser plate is a bell mouth.

[0015] The application of the technical solution of the utility model has the following beneficial effects:

[0016] The utility model discloses a mounting structure between a diffuser and a volute, wherein an external thread is arranged on the diffuser, and an internal thread is arranged on the inner hole of the volute, the diffuser is installed in the volute and the two are connected by the external thread and the internal thread, thereby effectively avoiding the problem that the diffuser and the volute are assembled by screws in the prior art, and the working surface of the diffuser plate is uneven after the diffuser is assembled, causing flow loss and reducing efficiency; at the same time, the assembly between the diffuser and the volute does not require other parts, thereby reducing the assembly complexity between the diffuser and the volute and improving the assembly efficiency.

[0017] In the utility model, an elastic sealing ring is arranged between the end face of the connecting cylinder and the end face of the cylinder installation cavity. On the one hand, the elastic sealing ring can fill the end face gap between the connecting cylinder and the cylinder installation cavity to prevent the gas from entering the end face gap and causing flow loss and reduced efficiency. On the other hand, the elastic sealing ring can provide an elastic force to the diffuser after elastic compression and deformation. The elastic force makes the internal thread and the external thread fit tightly, preventing the diffuser and the volute from loosening after assembly.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the installation method between the diffuser and the volute in the prior art;

[0021] Figure 2 It is a schematic diagram of the installation method between the diffuser and the volute in the utility model;

[0022] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle diffuser;

[0024] Figure 5 yes Figure 2 Schematic diagram of the structure of the middle volute;

[0025] Among them, 1. volute, 1.1. flange mounting cavity, 1.2. cylinder mounting cavity, 1.3. internal thread, 1.4. inlet flow channel section, 1.5. working flow channel section, 1.6. diffuser flow channel section, 1.7. volute flow channel section, 2. diffuser, 2.1. connecting cylinder, 2.2. external thread, 2.3. diffuser plate, 2.4. guide vane, 2.5. arc transition connection, 3. mounting screws, 4. elastic sealing ring. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below, and preferred embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] Example:

[0029] See also Figure 2-Figure 5 This embodiment provides a mounting structure between a diffuser and a volute, including a diffuser 2 and a volute 1, wherein the diffuser 2 is provided with an external thread 2.2, and the inner hole side wall of the volute 1 is provided with an internal thread 1.3, and the diffuser 2 is arranged on the volute 1 and the connection between the two is achieved by the cooperation of the external thread 2.2 and the internal thread 1.3.

[0030] Specifically, Figure 4 and Figure 5 As shown, the diffuser 2 comprises a connecting cylinder 2.1 and a diffuser plate 2.3 arranged at one end of the connecting cylinder 2.1, the circumferential outer wall of the connecting cylinder 2.1 is provided with an external thread 2.2, the volute 1 is provided with a flange mounting cavity 1.1 and a cylinder mounting cavity 1.2 in sequence, and the circumferential inner wall of the cylinder mounting cavity 1.2 is provided with an internal thread 1.3; Figure 2 and Figure 3 As shown, after the diffuser 2 is installed in the volute 1, the diffuser plate 2.3 is placed in the flange mounting cavity 1.1, the connecting cylinder 2.1 is placed in the cylinder mounting cavity 1.2, and the external thread 2.2 and the internal thread 1.3 are connected together.

[0031] In this embodiment, the diffuser 2 and the volute 1 are connected by external threads and internal threads, which avoids the problem of opening a hole on the diffuser disc 2.3 in the existing technology, and the uneven working surface of the diffuser disc 2.3 after assembly, resulting in flow loss and reduced efficiency. At the same time, it avoids the problem of assembling by multiple screws in the existing technology, with many assembly parts and a complicated assembly process. The working surface of the diffuser disc 2.3 refers to the end surface of the diffuser disc 2.3 away from the connecting cylinder 2.1.

[0032] like Figure 2 and Figure 3 As shown, the installation structure between the diffuser 2 and the volute 1 also includes an elastic sealing ring 4, which is arranged between the end face of the connecting cylinder 2.1 and the end face of the cylinder installation cavity 1.2; after the diffuser 2 is installed in the volute 1, the elastic sealing ring 4 undergoes elastic compression deformation along the axial direction of the diffuser 2. On the one hand, the elastic sealing ring 4 can fill the end face gap between the connecting cylinder 2.1 and the cylinder installation cavity 1.2 to prevent the gas from entering the end face gap and causing flow loss and reduced efficiency. On the other hand, after the elastic compression deformation, the elastic sealing ring 4 can provide an elastic force to the diffuser 2, which makes the internal thread and the external thread fit tightly, preventing the diffuser and the volute from loosening after assembly, that is, the elastic sealing ring 4 can play an anti-loosening effect after the elastic compression deformation.

[0033] Preferably, the elastic sealing ring 4 in this embodiment is a rubber sealing gasket.

[0034] Further, such as Figure 5 As shown, the interior of the volute 1 is provided with an inlet flow channel section 1.4, a working flow channel section 1.5, a diffuser flow channel section 1.6 and a volute flow channel section 1.7, and the gas enters from the inlet flow channel section 1.4, passes through the working flow channel section 1.5 and the diffuser flow channel section 1.6 in sequence, and then enters the volute flow channel section 1.7; wherein the flange mounting cavity 1.1 and the cylinder mounting cavity 1.2 are both arranged in the working flow channel section 1.5, and are located close to the diffuser flow channel section 1.6.

[0035] Further, such as Figure 2 and Figure 3 As shown, after the diffuser 2 is installed in the volute 1, the circumferential inner wall of the connecting cylinder 2.1, the circumferential inner wall of the working flow channel section 1.5 in the volute 1 and the circumferential inner wall of the elastic sealing ring 4 are flush, and the working surface of the diffuser plate 2.3 is flush with the working surface of the diffuser flow channel section 1.6 in the volute 1, ensuring that the gas can smoothly enter the diffuser flow channel section 1.6 from the working flow channel section 1.5, and during the flow process, no bulge or depression will be generated due to the assembly of the diffuser, resulting in gas flow loss or obstruction.

[0036] Furthermore, in this embodiment, a plurality of guide vanes 2.4 are evenly distributed along the circumferential direction on the working surface of the diffuser disc 2.3, and the gas is introduced into the volute in the direction of the guide vanes 2.4. Due to the restriction of the guide vanes on the airflow, the airflow deviates from the free flow trajectory, which has the advantages of small loss and high efficiency. Furthermore, the number of the guide vanes and the number of the compressor impeller blades cannot have a common divisor other than 1, otherwise resonance will be caused.

[0037] Preferably, in this embodiment, the connecting cylinder 2.1 and the diffuser plate 2.3 are integrally formed.

[0038] See also Figure 3 and Figure 4 The inner wall of the connecting cylinder 2.1 and the working surface of the diffuser disk 2.3 are connected by an arc transition connection 2.5, which can guide the flow of gas. Furthermore, by increasing the radius of the arc transition connection 2.5, a bell mouth can be formed at the junction between the inner wall of the connecting cylinder 2.1 and the working surface of the diffuser disk 2.3, achieving the effect of guiding the gas flow and increasing the gas flow cross section, which can increase the gas pressure.

[0039] In the installation structure between the diffuser and the volute in the present embodiment, an external thread is provided on the diffuser, and an internal thread is provided on the inner hole of the volute. The diffuser is installed in the volute and the two are connected by the external thread and the internal thread, which effectively avoids the problem of using screws to assemble the diffuser and the volute in the prior art, and the working surface of the diffuser plate in the diffuser is uneven after the diffuser is assembled, causing flow loss and reduced efficiency. At the same time, the assembly between the diffuser and the volute does not require other parts, which reduces the complexity of the assembly between the diffuser and the volute and improves the efficiency of the assembly.

[0040] In this embodiment, an elastic sealing ring 4 is arranged between the end face of the connecting cylinder 2.1 and the end face of the cylinder installation cavity 1.2. On the one hand, the elastic sealing ring 4 can fill the end face gap between the connecting cylinder 2.1 and the cylinder installation cavity 1.2 to prevent the gas from entering the end face gap and causing flow loss and reduced efficiency. On the other hand, the elastic sealing ring 4 can provide an elastic force to the diffuser 2 after elastic compression and deformation. The elastic force makes the internal thread and the external thread fit tightly, preventing the diffuser and the volute from loosening after assembly.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mounting structure between a diffuser and a volute, characterized in that: The invention comprises a diffuser (2) and a volute (1), wherein the diffuser (2) is provided with an external thread (2.2), and the inner hole side wall of the volute (1) is provided with an internal thread (1.3); the diffuser (2) is arranged on the volute (1) and the external thread (2.2) and the internal thread (1.3) cooperate to achieve connection between the two.

2. The mounting structure between the diffuser and the volute according to claim 1, characterized in that: The diffuser (2) comprises a connecting cylinder (2.1) and a diffuser plate (2.3) arranged at one end of the connecting cylinder (2.1); the circumferential outer wall of the connecting cylinder (2.1) is provided with an external thread (2.2); the volute (1) is provided with a flange mounting cavity (1.1) and a cylinder mounting cavity (1.2) in sequence; the circumferential inner wall of the cylinder mounting cavity (1.2) is provided with an internal thread (1.3); after the diffuser (2) is installed in the volute (1), the diffuser plate (2.3) is placed in the flange mounting cavity (1.1), the connecting cylinder (2.1) is placed in the cylinder mounting cavity (1.2), and the external thread (2.2) and the internal thread (1.3) are connected together.

3. The mounting structure between the diffuser and the volute according to claim 2, characterized in that: It also comprises an elastic sealing ring (4), which is arranged between the end surface of the connecting cylinder (2.1) and the end surface of the cylinder installation cavity (1.2); after the diffuser (2) is installed in the volute (1), the elastic sealing ring (4) undergoes elastic compression deformation along the axial direction of the diffuser (2).

4. The mounting structure between the diffuser and the volute according to claim 3, characterized in that: The elastic sealing ring (4) is a rubber sealing gasket.

5. The mounting structure between the diffuser and the volute according to claim 3, characterized in that: After the diffuser (2) is installed in the volute (1), the circumferential inner wall of the connecting cylinder (2.1), the circumferential inner wall of the working flow channel section (1.5) in the volute (1) and the circumferential inner wall of the elastic sealing ring (4) are flush with each other, and the working surface of the diffuser disc (2.3) is flush with the working surface of the diffuser flow channel section (1.6) in the volute (1).

6. The mounting structure between the diffuser and the volute according to claim 2, characterized in that: A plurality of guide vanes (2.4) are evenly distributed along the circumferential direction on the working surface of the diffuser disc (2.3).

7. The mounting structure between the diffuser and the volute according to claim 2, characterized in that: The connecting cylinder (2.1) and the diffuser disc (2.3) are integrally formed.

8. The mounting structure between the diffuser and the volute according to claim 2, characterized in that: An arc transition connection (2.5) is adopted between the inner wall of the connecting cylinder (2.1) and the working surface of the diffuser disc (2.3).

9. The mounting structure between the diffuser and the volute according to claim 8, characterized in that: The junction between the inner wall of the connecting cylinder (2.1) and the working surface of the diffuser disk (2.3) is a bell mouth.

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