Mechanical supercharger

Abstract

The utility model discloses a mechanical supercharger. The mechanical supercharger comprises a high-speed gearbox, a volute and a volute mounting flange, wherein the high-speed gearbox, the volute and the volute mounting flange are vertically arranged and are of a split structure; a first mounting hole is formed in the position, where the volute mounting flange is arranged, of the high-speed gear box, a second mounting hole is formed in the position, corresponding to the volute mounting flange, of the volute mounting flange, and a first bolt is arranged between the first mounting hole and the second mounting hole; third mounting holes are designed in the positions, where the volute mounting flange is arranged, of the volute, and second bolts are arranged between the third mounting holes. An opening is formed in the position, attached to the volute mounting flange, of the volute, the volute mounting flange is arranged at the opening, and a second bolt fixes the flange at the opening through a fixing piece; the end face, facing the high-speed gear box, of the volute installation flange is provided with an outer attaching part and an inner attaching part, and the inner attaching part is located in the center of the outer attaching part. The technical problem to be solved by the scheme is how to ensure that the replacement of the volute mounting flange does not affect the box body structure of the high-speed gear box.

Description

Technical Field

[0001] The utility model relates to a mechanical supercharger. Background Art

[0002] Centrifugal blowers and centrifugal compressors are both a type of mechanical supercharger that increases air pressure. They use centrifugal force to pressurize the outside air and send it into the required equipment, such as the combustion chamber of a diesel engine. The main structure of the current mechanical supercharger includes a high-speed gearbox housing, a volute, and an impeller. The volute mounting position on the gearbox is cast on the housing and formed by metal processing. The volute is then mounted on the above-mentioned volute mounting flange or mounting plate through bolts or press plates and bolts. In this method, the volute mounting flange is integrated with the high-speed gearbox housing. If the design and size of the impeller and volute change, the flange and the entire high-speed gearbox housing must be re-molded and re-processed. Therefore, the existing design volute installation method is not conducive to the serial development of impellers and volutes.

[0003] After searching, Chinese patent application No. 202220980655X discloses an integrated centrifugal compressor casing, whose volute and gearbox are an integrated structure, which poses the above-mentioned problem. Utility Model Content

[0004] The utility model aims to provide a mechanical supercharger, and solves the technical problem of how to replace the volute mounting flange without affecting the box structure of the high-speed gearbox, and to provide a structure to facilitate the mutual assembly of volutes of different specifications and the high-speed gearbox.

[0005] A mechanical supercharger comprises a high-speed gearbox, a volute mounting flange and a volute in a vertically arranged split structure; the high-speed gearbox is designed with a first mounting hole at a position where the volute mounting flange is configured, the flange is designed with a second mounting hole at a corresponding position, and a first bolt is configured between the first mounting hole and the second mounting hole; the volute is designed with a third mounting hole at a position where the volute is configured with the volute mounting flange, and a second bolt is configured between the third mounting holes; the volute has an opening at a position where the volute is fitted with the volute mounting flange, the volute mounting flange is configured at the opening position, and the second bolt fixes the volute mounting flange at the opening position through a fixing member; the end face of the mounting volute flange facing the gearbox has an outer fitting portion and an inner fitting portion, wherein the inner fitting portion is located at the center of the outer fitting portion.

[0006] The fixing piece is an arc-shaped sheet-like pressing piece, one end of which is fixed to the volute by a second bolt, and the other end of which presses the volute mounting flange.

[0007] The fixing members are in plurality and arranged at intervals.

[0008] The edge position of the volute mounting flange is provided with an annular first step, and the volute is provided with an annular second step at a corresponding position, and the first step and the second step are fitted to each other.

[0009] The volute mounting flange is a circular structure as a whole.

[0010] The beneficial effects of the utility model are as follows: through the unique design, the replacement and adjustment of volute mounting flanges of different specifications will not affect the high-speed gearbox housing structure, thereby making the manufacturing simple, the structure reliable, and the installation convenient; when the volute is changed, the high-speed gearbox housing does not need to be changed or remade, and only the size of the volute mounting flange needs to be changed, so it is very suitable for the serialized design of impellers and volutes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of a supercharger of Example 1;

[0012] Figure 2 yes Figure 1 A schematic diagram of a supercharger from another angle;

[0013] Figure 3 yes Figure 1 Exploded diagram of a supercharger;

[0014] Figure 4 yes Figure 1 An exploded schematic diagram of the supercharger from another angle;

[0015] Figure 5 is a schematic diagram of a supercharger of Example 2;

[0016] Figure 6 yes Figure 5 Exploded diagram of a supercharger;

[0017] Figure 7 yes Figure 5 An exploded schematic diagram of the supercharger from another angle;

[0018] Figure 8 It is a schematic diagram showing the cooperation between the volute, flange and fixings;

[0019] In the figure, 1. high-speed gearbox, 11. first mounting hole, 2. volute mounting flange, 21. second mounting hole, 22. outer fitting portion, 23. inner fitting portion, 24. first step, 3. volute, 31. third mounting hole, 32. second step, 33. opening, 4. fixing member, 41. pressing plate, 51. first bolt, 52. second bolt. DETAILED DESCRIPTION

[0020] Please refer to Figures 1 to 4 The mechanical supercharger in the figure is designed with a high-speed gearbox 1, a volute mounting flange 2, and a volute 3; the volute 3 is mounted on the high-speed gearbox 1 through the volute mounting flange 2, and the volute mounting flange 2 and the high-speed gearbox 1 housing are two separate components.

[0021] The high-speed gearbox 1 of this embodiment is a vertically arranged integral box-type design, and its internal design has a gear set speed-increasing function; the high-speed gearbox 1 is designed with four first mounting holes 11 arranged in a circumferential manner on the end face facing the volute mounting flange 2, and the volute mounting flange 2 is also designed with four second mounting holes 21 with a hole-like structure at the corresponding position, so that the high-speed gearbox 1 and the volute mounting flange 2 can be fixed at this position by using the first bolt 51 to pass through the above-mentioned first mounting holes 11 and second mounting holes 21. Except for the parts configured with the volute mounting flange 2, the other external parts and internal structures of the high-speed gearbox 1 can refer to the existing design. As long as the structure of the parts that match the high-speed gearbox 1 remains unchanged, the other parts of the volute mounting flange 2 can be adjusted as needed, such as increasing the overall diameter, etc., so that a high-speed gearbox 1 can be matched with a variety of styles of volute mounting flanges 2, so that product serialization becomes possible.

[0022] The volute mounting flange 2 of this embodiment adopts a disc-shaped circular structure design as a whole, and its end face facing the high-speed gearbox 1 is respectively designed with an outer fitting portion 22 and an inner fitting portion 23. The inner fitting portion 23 is located at the center of the outer fitting portion 22, and the diameter of the outer fitting portion 22 can be within three times the diameter of the inner fitting portion 23. The inner fitting portion 23 is designed with a first mounting hole 11 structure, and the outer fitting portion 22 belongs to the edge profile of the volute mounting flange 2, which is used to be able to fix the volute 3 to the volute mounting flange 2 at this position by fitting with the fixing member 4 in the subsequent step. As shown in the figure, the fixing member 4 adopts a design of four sheet-like pressing sheets 41 arranged at intervals on a circumference, such as Figure 8As shown, a part of the volute 3 can be installed on the volute 3 by the second bolt 52, and the other part presses the volute mounting flange 2 as shown in the figure. In order to install the second bolt 52, the volute 3 is designed with a third mounting hole 31 structure at the position that cooperates with the volute mounting flange 2, so that the second bolt 52 is used to pass through the third mounting hole 31 to fix the fixing member 4 at this position. On the other side of the volute mounting flange 2, the volute mounting flange 2 is designed with an annular first step 24 at the edge position, and the corresponding volute 3 is designed with an opening 33 structure in the direction toward the volute mounting flange 2 and an annular second step 32 structure at this position, so that the volute 3 and the volute mounting flange 2 are assembled at the opening 33 position by the second bolt 52 in the opposite direction of the pressing plate 41. In actual use, the specific structure of the volute mounting flange 2, the structure of the high-speed gearbox 1 and the volute 3, and the number of pressing plates 41 can be adjusted as needed.

[0023] The volute 3 of this embodiment adopts a flow channel offset structure design as a whole, and an impeller is installed inside it. The difference between this volute 3 and the existing volute 3 is that the corresponding structure is designed at the position where the volute mounting flange 2 is configured to facilitate the installation, interchange and assembly of volutes of different specifications. The design of the shape and structure of other positions of the volute 3 can refer to the existing methods.

[0024] Please refer to Figures 5 to 7 The difference between the mechanical supercharger of this embodiment and the mechanical supercharger of the above-mentioned embodiment is that the volute mounting flange 2 adopts a structure with a larger diameter, and the corresponding volute 3 also adopts a large opening 33 structure. As shown in the figure, the structure of the inner fitting portion 23 of the above-mentioned volute mounting flange 2 is basically unchanged, and the diameter of the outer fitting portion 22 is enlarged. In this way, the high-speed gear box 1 mentioned in Example 1 can be used to fix the replaced volute mounting flange 2 and volute 3, so that one set of high-speed gear boxes 1 can correspond to multiple sets of volute mounting flanges 2 and volutes 3.

[0025] The specific embodiments described above are only used to explain the present technical solution and are not used to limit the present technical solution. In the description of the present technical solution, it should be noted that the terms such as "upper" and "inner" indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present technical solution and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present technical solution.

[0026] At the same time, in the description of this technical solution, it should be noted that, unless otherwise clearly specified and limited, the terms "fixed" and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0027] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present technical solution, and that the scope of the present technical solution is defined by the appended claims and their equivalents.

Claims

1. A mechanical supercharger, characterized in that: The invention comprises a high-speed gearbox (1), a volute mounting flange (2), and a volute (3) in a vertically split structure; the high-speed gearbox (1) is provided with a first mounting hole (11) at a position where the volute mounting flange (2) is arranged, the volute mounting flange (2) is provided with a second mounting hole (21) at a corresponding position, and a first bolt (51) is arranged between the first mounting hole (11) and the second mounting hole (21); the volute (3) is provided with a third mounting hole (31) at a position where the volute mounting flange (2) is arranged, and the third mounting hole (31) is provided ) is arranged between the volute (3) and the volute mounting flange (2); the volute (3) has an opening (33) at a position where it fits with the volute mounting flange (2), the volute mounting flange (2) is arranged at the position of the opening (33), and the second bolt (52) fixes the volute mounting flange (2) at the position of the opening (33) via a fixing member (4); the end surface of the volute mounting flange (2) facing the high-speed gearbox (1) has an outer fitting portion (22) and an inner fitting portion (23), wherein the inner fitting portion (23) is located at the center of the outer fitting portion (22).

2. The mechanical supercharger according to claim 1, characterized in that: The fixing member (4) is an arc-shaped sheet-like pressing piece (41), one end of which is fixed to the volute (3) by a second bolt (52), and the other end of which presses the volute mounting flange (2).

3. The mechanical supercharger according to claim 2, characterized in that: The fixing members (4) are in plurality and are arranged at intervals.

4. The mechanical supercharger according to claim 2, characterized in that: The volute mounting flange (2) has an annular first step (24) at an edge position, and the volute (3) has an annular second step (32) at a corresponding position, and the first step (24) and the second step (32) fit together.

5. The mechanical supercharger according to claim 3, characterized in that: The volute mounting flange (2) is of a circular structure as a whole and can be interchangeable in series of different specifications.

Images