Gas compressor

Abstract

The utility model discloses a gas compressor, which comprises a gas compressor shell component, a gas compressor shell component and a gas compressor shell component, and is characterized in that the gas compressor shell component comprises a volute and a middle body, and the volute is provided with a gas inlet channel and a gas compression channel; the diffuser of a rotary body structure is assembled in the air inlet channel, and the tail end of an inner hole of the diffuser expands outwards to form a first flow guide face of an arc-shaped structure; the middle body is provided with an arc-shaped second flow guide face which is folded inwards, and the tail end of the first flow guide face and the tail end of the second flow guide face extend to the compressed air channel. The impeller is arranged between the first flow guide face and the second flow guide face, and diffusion channels of C-shaped structures are formed between the adjacent blades and between the first flow guide face and the second flow guide face; the air inlet channel is communicated with the air compression channel through the diffusion channel. The air compressor has the advantages of being high in air compression efficiency and low in cost. The utility model relates to the technical field of turbochargers.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger technology, and more specifically to an air compressor. Background Technology

[0002] Throughout the development of compressors, improving aerodynamic performance, flow stability, and reducing production costs have always been the industry's unwavering goals. Traditional compressors suffer from several technical shortcomings. For example, compressors using a U-shaped diffuser suffer from poor aerodynamic performance and flow stability, resulting in low compression efficiency. Meanwhile, some traditional C-shaped diffuser compressors require the volute to be cast as a single, curved guide surface, making the process extremely complex and significantly increasing production costs. Therefore, developing a compressor that can improve performance while simplifying the process and reducing costs is of significant practical importance. Utility Model Content

[0003] To address the shortcomings and defects of existing technologies, a compressor with high compression efficiency and low cost is provided.

[0004] A compressor, comprising:

[0005] The compressor housing assembly includes a volute and an intermediate body, wherein the volute is provided with an air intake passage and a compressor passage;

[0006] A diffuser with a rotating body structure is assembled inside the intake passage, and its inner hole is designed to extend outward at the tail end to form an arc-shaped first guide surface.

[0007] The intermediate body is provided with a second guide surface that curves inward and converges inward, and the tail ends of the first guide surface and the second guide surface extend to the air compression channel respectively.

[0008] The impeller is disposed between the first guide surface and the second guide surface, and a diffuser channel with a "C" shape is formed between adjacent blades and between the first guide surface and the second guide surface;

[0009] The intake passage is connected to the compressor passage through the diffuser passage.

[0010] With the above structure, the compressor of this utility model has the following advantages compared with the prior art: This application utilizes the first guide surface of the arc-shaped structure on the diffuser and the second guide surface of the arc-shaped structure on the intermediate body, and the channel between the intermediate blades to form a "C"-shaped diffusion channel.

[0011] Compared with traditional compressors with "U"-shaped diffuser channels, this device improves aerodynamic performance and flow stability, and features high compression efficiency.

[0012] Traditional compressors with "C"-shaped diffuser channels require the volute to be cast as a single, arc-shaped guide surface, which is a complex and costly process. In contrast, this device features an arc-shaped first guide surface on the assembled diffuser, resulting in a simpler structure, easier manufacturing, and lower cost.

[0013] As an improvement of this utility model, the diffuser includes a connecting section and a diffuser section disposed at the tail end of the connecting section.

[0014] The connecting section and the diffuser section are integrally formed structures;

[0015] The connecting section is press-fitted into the intake passage using an interference fit.

[0016] The first guide surface is located inside the diffuser section.

[0017] As an improvement of this utility model, the first guide surface includes, from the front end to the rear end, an arc-shaped descending section, a first straight extending section, and a first arc-shaped ascending section.

[0018] The arc-shaped descending section is fitted with the outer end of the blade along the clearance, and the tail end of the first arc-shaped ascending section extends to the inner edge of the compressor channel.

[0019] As an improvement of this utility model, the second guide surface includes a second straight extension section and a second arc-shaped rising section from the front end to the rear end.

[0020] Among them, the front end of the second straight extension section is opposite to the end of the arc-shaped descending section, and the tail end is opposite to the front end of the first arc-shaped ascending section. The tail end of the second arc-shaped ascending section extends to the outer edge of the compressor channel.

[0021] The impeller is positioned between the front end of the arc-shaped descending section and the first straight extension section.

[0022] As an improvement of this utility model, the cross-sectional area of ​​the diffuser channel gradually decreases from the front end to the rear end.

[0023] As an improvement of this utility model, the arc-shaped descending section is provided with a groove of an annular structure to form a vortex structure. Attached Figure Description

[0024] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of this utility model after the impeller is hidden.

[0026] Figure 3 This is the utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0027] Figure 4 This is a schematic diagram of the diffuser structure of this utility model.

[0028] Figure 5 This is a diagram showing how the cross-sectional area A of the compressor channel gradually increases from the beginning to the end of the channel.

[0029] Figure 6 This is a cross-sectional view of the compressor channel.

[0030] Figure 7 This is a linear distribution diagram showing the increasing trend of the cross-sectional area A of the compressor channel;

[0031] Figure 8 This is a linear distribution diagram showing the increasing trend of the cross-sectional area A / R of the compressor channel.

[0032] The diagram shows: 1. Volute; 1.1. Inlet passage; 1.2. Compressor passage; 2. Intermediate body; 3. Diffuser; 3.1. Connecting section; 3.2. Diffuser section; 4. First guide surface; 4.1. Arc-shaped descending section; 4.2. First straight extension section; 4.3. First arc-shaped ascending section; 5. Second guide surface; 5.1. Second straight extension section; 5.2. Second arc-shaped ascending section; 6. Impeller; 7. Diffuser passage; 8. Groove. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Please see Figure 1-4 As shown,

[0035] A compressor, comprising:

[0036] The compressor housing assembly includes a volute 1 and an intermediate body 2, wherein the volute 1 is provided with an air intake passage 1.1 and a compressor passage 1.2;

[0037] The diffuser 3 with a rotating body structure is installed in the intake passage 1.1, and its inner hole is set to extend outward at the tail end to form the first guide surface 4 with an arc-shaped structure.

[0038] The intermediate body 2 is provided with a second guide surface 5 that curves inward and converges inward. The tail ends of the first guide surface 4 and the second guide surface 5 extend to the compressor channel 1.2, respectively.

[0039] Impeller 6 is disposed between the first guide surface 4 and the second guide surface 5, and a diffuser channel 7 with a "C" shape is formed between adjacent blades and between the first guide surface 4 and the second guide surface 5;

[0040] The intake passage 1.1 is connected to the compressor passage 1.2 through the diffuser passage.

[0041] By utilizing the first guide surface 4 of the arc-shaped structure on the diffuser 3 and the second guide surface 5 of the arc-shaped structure on the intermediate body 2, a "C"-shaped diffusion channel is formed with the channel between adjacent blades.

[0042] In traditional compressors, the diffuser channel 7 between the intake channel and the compressor channel is a U-shaped structure. In this application, even without the diffuser 3, the basic diffuser channel is also a U-shaped structure.

[0043] Compared with traditional compressors with "U"-shaped diffuser channels, this device improves aerodynamic performance and flow stability, and features high compression efficiency.

[0044] Traditional compressors with a "C"-shaped diffuser channel require the volute 1 to be cast as a single, arc-shaped guide surface during casting, which is a complex process and has a high cost. In contrast, this device has an arc-shaped first guide surface 4 on the assembled diffuser 3, which simplifies the structure, makes manufacturing easier, and has the advantage of lower cost.

[0045] As an improvement of this utility model, the diffuser 3 includes a connecting section 3.1 and a diffuser section 3.2 disposed at the tail end of the connecting section 3.1. The connecting section 3.1 and the diffuser section 3.2 are integrally formed structures. The connecting section 3.1 is press-fitted into the intake channel 1.1 by an interference fit. The first guide surface 4 is disposed inside the diffuser section 3.2.

[0046] The one-piece molded diffuser 3 ensures the overall strength and stability of the diffuser 3;

[0047] The connecting section 3.1 is inserted into the end of the air intake channel 1.1 by means of interference fit. After the connection is completed, the outer wall of the connecting section 3.1 and the inner wall of the air intake channel 1.1 are tightly connected to form a reliable sealing pair. The connection between them is stable and can better withstand the airflow pressure, making the device more reliable and with better performance.

[0048] Preferably, the end of the air intake channel is provided with an enlarged diameter connecting hole for the connecting section 3.1 to be inserted. The diameter of the air intake channel and the inner diameter of the connecting section 3.1 are close to each other to reduce the resistance to airflow and make the airflow smooth.

[0049] As an improvement of this utility model, the first guide surface 4 includes, from the front end to the tail end, an arc-shaped descending section 4.1, a first straight extending section 4.2, and a first arc-shaped ascending section 4.3; wherein, the arc-shaped descending section 4.1 is clearance-fitted with the outer end of the blade, and the tail end of the first arc-shaped ascending section 4.3 extends to the inner edge of the compressor channel 1.2.

[0050] The arc-shaped descending section 4.1, with its clearance fitting to the outer end of the blade, allows the airflow to smoothly enter the diffuser channel 7, reducing airflow impact and turbulence. The first straight extension section 4.2 helps stabilize the airflow direction, while the first arc-shaped ascending section 4.3 smoothly introduces the airflow into the compressor channel 1.2, optimizing the airflow path within the compressor and thus improving the compressor's aerodynamic performance and efficiency. It has a creative airflow guiding and optimization function.

[0051] As an improvement of this utility model, the second guide surface 5 includes a second straight extension section 5.1 and a second arc-shaped rising section 5.2 from the front end to the rear end; wherein, the front end of the second straight extension section 5.1 is opposite to the end of the arc-shaped descending section 4.1, and the rear end is opposite to the front end of the first arc-shaped rising section 4.3, and the rear end of the second arc-shaped rising section 5.2 extends to the outer edge of the compressor channel 1.2; the impeller 6 is disposed between the arc-shaped descending section 4.1 and the front end of the second straight extension section 5.1.

[0052] The second guide surface 5 is composed of a second straight extension section 5.1 and a second arc-shaped rising section 5.2, and is designed with a specific positional relationship with the first guide surface 4 and the impeller 6 to form a diffuser channel 7 with a "C" shaped structure.

[0053] It features a reasonable structural layout.

[0054] As an improvement of this utility model, the cross-sectional area of ​​the diffuser channel 7 gradually decreases from the front end to the rear end.

[0055] As an improvement of this utility model, the arc-shaped descending section 4.1 is provided with a groove 8 of an annular structure to form a vortex structure. The vortex control technology of the "vortex structure" can effectively suppress the formation of diffuser flow field separation, improve the overall performance of the diffuser, increase the static pressure recovery coefficient by 6% and the total pressure recovery coefficient by 1.2% compared with the prototype diffuser.

[0056] For preferred options, please refer to [link / reference]. Figures 5-8 The cross-sectional area A of the compressor channel 1.2 gradually increases from the beginning of the channel to the end of the channel, and the increase follows a linear distribution; this is used to suppress the pressure drop along the volute 1.

[0057] The ratio A / R of the cross-sectional area A of the compressor channel 1.2 to the distance R from the centroid of the cross section to the rotating shaft of the impeller 6 gradually increases from the beginning of the channel to the end of the channel, and the increasing law satisfies the linear distribution; it is used to suppress the pressure drop along the volute 1.

[0058] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A compressor, characterized in that, include: The compressor housing assembly includes a volute (1) and an intermediate body (2), wherein the volute (1) is provided with an air intake passage (1.1) and a compressor passage (1.2). The diffuser (3) with a rotating body structure is installed in the intake channel (1.1), and its inner hole is extended outward at the tail end to form the first guide surface (4) with an arc-shaped structure. The intermediate body (2) is provided with an arc-shaped inwardly converging second guide surface (5), and the tail ends of the first guide surface (4) and the second guide surface (5) extend to the compressed air channel (1.2). The impeller (6) is disposed between the first guide surface (4) and the second guide surface (5), and a diffuser channel (7) with a "C" shape is formed between adjacent blades and between the first guide surface (4) and the second guide surface (5). The intake passage (1.1) is connected to the compressor passage (1.2) through the diffuser passage (7).

2. The compressor according to claim 1, characterized in that: The diffuser (3) includes a connecting section (3.1) and a diffuser section (3.2) disposed at the end of the connecting section (3.1). The connecting section (3.1) and the diffuser section (3.2) are integrally formed structures; Among them, the connecting section (3.1) is press-fitted into the intake channel (1.1) by an interference fit; The first guide surface (4) is located inside the diffuser section (3.2).

3. The compressor according to claim 1, characterized in that: The first guide surface (4) includes, from the front end to the rear end, an arc-shaped descending section (4.1), a first straight extending section (4.2), and a first arc-shaped ascending section (4.3). Among them, the arc-shaped descending section (4.1) is fitted with the outer edge of the blade with a clearance, and the tail end of the first arc-shaped ascending section (4.3) extends to the inner edge of the compressor passage (1.2).

4. A compressor according to claim 3, characterized in that: The second guide surface (5) includes a second straight extension section (5.1) and a second arc-shaped rising section (5.2) from the front end to the rear end. Among them, the front end of the second straight extension section (5.1) is opposite to the end of the arc-shaped descending section (4.1), and the tail end is opposite to the front end of the first arc-shaped ascending section (4.3). The tail end of the second arc-shaped ascending section (5.2) extends to the outer edge of the compressor channel (1.2). The impeller (6) is positioned between the front end of the arc-shaped descending section (4.1) and the second straight extending section (5.1).

5. A compressor according to claim 1, characterized in that: The diffuser channel (7) has a structure in which the cross-sectional area gradually decreases from the front end to the rear end.

6. A compressor according to claim 3, characterized in that: The arc-shaped descending section (4.1) is provided with a groove (8) of an annular structure to form a vortex structure.

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