Gas engine supercharger device

Abstract

The utility model discloses a gas engine supercharger device which comprises a volute, a supercharging shell, a middle connecting shell and a rotating shaft, a cooling space is arranged in the middle connecting shell, a temperature sensor is assembled on the side, close to the volute, of the middle connecting shell, and a flow sensor is assembled on a water inlet pipeline. The large end in the cooling space comprises a first space arranged in the axial direction of the rotating shaft and close to the rotating shaft, and a second space distributed in the radial direction of the middle connecting shell and close to the volute. By arranging the temperature sensor, the temperature of the middle connecting shell can be detected in real time, and the flow speed of cooling water entering the cooling space is adjusted according to the detected temperature value. The heat transfer capacity of heat on the volute side towards the pressurizing shell side through the rotating shaft can be mainly reduced through the first space, the heat transfer capacity of heat on the volute side towards the pressurizing shell side through the middle connecting shell is reduced through the second space, and the radiation capacity of heat on the volute side towards the pressurizing shell side is reduced as much as possible.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to a supercharger device for a gas engine. Background Art

[0002] A supercharger for a gas engine compresses the air-fuel mixture before it enters the engine cylinder to increase the density of the mixture, so that more mixture can fill the cylinder and increase the engine power.

[0003] The supercharger includes a volute side and a supercharging housing side. High-temperature exhaust gas enters the volute to drive the turbine to rotate, and through the transmission of the rotating shaft, the rotational force is transmitted to the supercharging side to pressurize the air-fuel mixture entering the supercharging side. Since the high-temperature exhaust gas enters the volute side, which has a relatively high temperature, the heat generated will be transmitted towards the supercharging side through the intermediate connecting housing, affecting the temperature stability of the air-fuel mixture in the supercharging side. Therefore, a corresponding cooling structure is needed to cool it, so that the temperature of the supercharging side tends to be balanced and the influence of the high temperature on the supercharging side is reduced. Based on this, this application further studies and develops the cooling structure of the supercharger to improve the stability of supercharging. Summary of the Utility Model

[0004] Aiming at the above technical problems, the purpose of the utility model is to provide a supercharger device for a gas engine that improves the stability of supercharging.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] The supercharger device for a gas engine includes a volute and a supercharging housing. The volute has an exhaust gas inlet, an exhaust gas outlet, and a turbine. Exhaust gas enters the volute from the exhaust gas inlet, pushes the turbine to rotate, and is discharged from the exhaust gas outlet;

[0007] The supercharging housing has an air-fuel mixture inlet, an air-fuel mixture outlet, and an impeller. The impeller is coaxially arranged with the turbine. The air-fuel mixture enters the supercharging housing through the air-fuel mixture inlet, and under the drive of the impeller, forms a high-pressure air-fuel mixture and is discharged from the air-fuel mixture outlet;

[0008] The volute and the supercharging housing are fixedly connected through an intermediate connecting housing. A rotating shaft is rotatably arranged in the intermediate connecting housing. One end of the rotating shaft extends into the volute for the assembly of the turbine, and the other end extends into the supercharging housing for the assembly of the impeller;

[0009] A cooling space is arranged in the intermediate connecting housing. The cooling space is arranged close to the volute. An inlet pipe and a return pipe that communicate with the cooling space are assembled on the intermediate connecting housing. A temperature sensor for detecting the temperature of the intermediate connecting housing is assembled on the side of the intermediate connecting housing close to the volute. A flow sensor for detecting the water flow rate in the inlet pipe is assembled on the inlet pipe;

[0010] The cooling space is distributed in an annular manner along the axial direction in the intermediate connecting shell; the space in the cooling space is larger at one end close to the volute than at the end far from the volute, and the larger end in the cooling space includes a space 1 arranged along the axial direction of the rotating shaft and close to the rotating shaft, and a space 2 distributed along the radial direction of the intermediate connecting shell and close to the volute;

[0011] An oil inlet channel and an oil outlet channel are arranged in the middle connecting shell, and the oil inlet channel and the oil outlet channel connect the rotating shaft and the rotating part in the middle connecting shell. The middle connecting shell is equipped with an oil inlet pipeline connected with the oil inlet channel and an oil outlet pipeline connected with the oil outlet channel.

[0012] As a further solution, an axial hole for assembling the rotating shaft is axially opened in the intermediate connecting shell, the axial hole passes through both ends of the intermediate connecting shell, and mounting grooves are respectively opened at both ends of the axial hole. A rotating part is assembled in the mounting groove, and the rotating part is sleeved on the rotating shaft; the oil inlet channel and the oil outlet channel are at least connected to the mounting groove.

[0013] As a further solution, the middle parts of the two end surfaces of the intermediate connecting shell are respectively recessed inward to form an annular notch, and the installation notch is located at the bottom of the annular notch;

[0014] A shell cover is detachably mounted on the middle connecting shell to seal the annular notch, a clearance hole for the rotation shaft to drive is opened in the middle of the shell cover, and the axis of the clearance hole is arranged in a colinear manner with the axis of the axial hole;

[0015] Seals are respectively arranged between the bottom wall of the annular notch on the inner side wall of the shell cover and between the inner wall of the through hole and the rotating shaft.

[0016] As a further solution, the middle parts of the outer sides of the two shell covers respectively extend outward to form a docking platform that exceeds the end surface of the intermediate connecting shell, and the vortex shell and the supercharger shell are respectively provided with docking slots corresponding to the docking platform;

[0017] Fixed connection rings are respectively arranged at two ends of the outer circumference of the intermediate connection shell, and the fixed connection rings are respectively connected to the volute shell and the supercharger shell through fixed connection pieces.

[0018] As a further solution, the exhaust gas outlet is connected to an exhaust pipe, one end of the exhaust pipe is connected to the exhaust gas outlet through a flange, and the other end is bent 90 degrees to be arranged in the opposite direction to the exhaust gas inlet.

[0019] As a further solution, one end of the water inlet pipe is assembled to one side of the intermediate connecting shell through a first threaded joint, and the other end of the water inlet pipe is assembled with a water inlet silicone connecting pipe, and a 90-degree bend section is formed in the middle of the water inlet pipe;

[0020] One end of the return pipe is assembled on the other side of the middle connecting shell through a second threaded joint, and the other end of the return pipe is equipped with a return silicone connecting pipe. The middle part of the return pipe is bent three times to form a bent section.

[0021] As a further solution, the mixed gas outlet of the supercharged shell is connected to a mixed gas outlet pipe and an exhaust pipe, the mixed gas outlet pipe is connected to the mixed gas outlet of the supercharged shell through a first clamp, the other end of the mixed gas outlet pipe is connected to one end of the exhaust pipe through a second clamp, and the other end of the exhaust pipe is connected to a pipe assembly; the connecting end of the exhaust pipe and the mixed gas outlet pipe is a 90-degree bent section;

[0022] The arrangement direction of the exhaust pipe is the same as that of the water inlet silicone connecting pipe and the water return silicone connecting pipe.

[0023] As a further solution, a pipe bracket is installed on the exhaust pipe, and the pipe bracket includes an annular part that clamps the exhaust pipe, and a frame connected to the annular part by screws. The frame is located on one side of the outer axial direction of the exhaust pipe, and the frame is equipped with connecting screws.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. By setting a cooling space at the middle connecting shell, the high temperature generated on the volute side can be cooled down, and by setting a temperature sensor, the temperature of the middle connecting shell can be detected in real time, so as to adjust the flow rate of cooling water entering the cooling space according to the detected temperature value.

[0026] 2. Space 1 and Space 2 are formed in the cooling space. Space 1 can mainly reduce the heat transfer capacity of the vortex casing side through the rotating shaft toward the supercharger casing side, and Space 2 can reduce the heat transfer capacity of the vortex casing side through the intermediate connecting shell toward the supercharger casing side. Through the arrangement of the cooling space, the radiation capacity of the heat from the vortex casing side toward the supercharger casing side can be reduced as much as possible, so as to reduce the temperature influence of the high temperature on the vortex casing side on the supercharger casing side, and ensure the stability of the supercharged mixture when entering the supercharger casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the intermediate connecting shell in the utility model;

[0030] Figure 3 is Figure 1 a schematic cross-sectional structure diagram taken along the A-A direction in

[0031] Reference numerals in the figure:

[0032] 10. volute, 11. supercharging housing, 12. exhaust gas inlet, 13. exhaust gas outlet, 14. air-fuel mixture inlet, 15. air-fuel mixture outlet, 16. rotating shaft, 17. cooling space, 18. water inlet pipe, 19. return water pipe;

[0033] 20. Space 1, 21. Space 2, 22. oil inlet channel, 23. oil outlet channel, 24. oil inlet pipe, 25. axial hole, 26. mounting notch, 27. rotating part, 28. annular notch, 29. housing cover;

[0034] 30. seal, 31. docking socket, 32. fixed connection ring, 33. fixed connection piece, 34. exhaust connection pipe, 35. docking flange, 36. first threaded joint, 37. water inlet silica gel connecting pipe, 38. second threaded joint, 39. return water silica gel connecting pipe;

[0035] 40. air-fuel mixture discharge connection pipe, 41. exhaust connection pipe, 42. first clamp, 43. second clamp, 44. first silica gel pipe, 45. second silica gel pipe, 46. intermediate connection pipe, 47. clamping part, 48. sealing gasket,

[0036] 49. annular part;

[0037] 50. frame body, 51. connecting screw, 52. sealing pressure ring, 53. intermediate connection housing. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1-3As shown, the gas engine supercharger device includes a volute 10 and a supercharging housing 11. The volute 10 is located on one side of the supercharging housing 11. The volute 10 has an exhaust gas inlet 12, an exhaust gas outlet 13, and a turbine. Exhaust gas enters the volute 10 from the exhaust gas inlet 12, drives the turbine to rotate, and is discharged from the exhaust gas outlet 13 to provide supercharging power for the supercharging housing 11. The supercharging housing 11 has a mixture inlet 14, a mixture outlet 15, and an impeller. The impeller is coaxially arranged with the turbine. The mixture enters the supercharging housing 11 through the mixture inlet 14, and under the drive of the impeller, a high-pressure mixture is formed and discharged from the mixture outlet 15. That is, when the turbine is driven to rotate by high-temperature exhaust gas, the impeller also rotates accordingly. Thus, in the supercharging housing 11, the mixture in the supercharging housing 11 is supercharged by the impeller to form a high-pressure mixture and is discharged from the mixture outlet 15.

[0040] A fixed connection is formed between the volute 10 and the supercharging housing 11 through an intermediate connecting housing 53. That is, one end of the intermediate connecting housing 53 is fixedly connected to one end of the volute 10, and the other end is fixedly connected to the supercharging housing 11. A rotating shaft 16 is rotatably arranged in the intermediate connecting housing 53. One end of the rotating shaft 16 extends into the volute 10 for the assembly of the turbine, and the other end extends into the supercharging housing 11 for the assembly of the impeller, thereby realizing the coaxial arrangement of the impeller and the turbine.

[0041] A cooling space 17 is arranged in the intermediate connecting housing 53. The cooling space 17 is arranged close to the volute 10. An inlet water pipe 18 and a return water pipe 19 that communicate with the cooling space 17 are assembled on the intermediate connecting housing 53. A temperature sensor for detecting the temperature of the intermediate connecting housing 53 is assembled on the side of the intermediate connecting housing 53 close to the volute 10. A flow sensor for detecting the water flow rate in the inlet water pipe 18 is assembled on the inlet water pipe 18. Since the main high-temperature part is concentrated at the volute 10, the cooling space 17 is arranged close to the volute 10 to cool the volute 10. One is to reduce the influence caused by the high temperature of the turbine and its internal components, and the other is to reduce the probability of the high temperature at the volute 10 being transmitted towards the supercharging housing 11. When the temperature sensor detects that the temperature at the volute 10 is higher than the set temperature, by increasing the conveying capacity of the water pump sending water into the inlet water pipe 18, the flow rate of the cooling water towards the cooling space 17 is accelerated, and the flow rate of the cooling water in the cooling space 17 is increased, thereby accelerating the cooling capacity of the volute 10. Among them, the flow sensor is used to detect the inlet water flow rate of the inlet water pipe 18 in real time to feedback the conveying capacity of the water pump.

[0042] The cooling space 17 is annularly distributed along the axis in the middle connection shell 53; the space in the cooling space 17 is larger at one end close to the volute 10 than at the end far from the volute 10. The larger end in the cooling space 17 includes a space one 20 arranged axially along the rotating shaft 16 and approaching the rotating shaft 16, and a space two 21 distributed radially along the middle connection shell 53 and close to the volute 10. The space one 20 is mainly used to reduce the heat transfer capacity from the volute 10 side to the supercharging shell 11 side through the rotating shaft 16. The space one 20 can extend to the middle position of the rotating shaft 16 at one end close to the volute 10 side to increase the cooling capacity of the space one 20 for the rotating shaft 16. The space two 21 is mainly used to reduce the heat transfer capacity from the volute 10 side to the supercharging shell 11 side through the middle connection shell 53. Through the arrangement of the cooling space 17, the radiation capacity of the heat from the volute 10 side to the supercharging shell 11 side is reduced as much as possible. The inner wall of the cooling space 17 can be designed into a undulating shape with different protruding lengths towards the cooling space 17 to increase the contact surface between the cooling water in the cooling space 17 and the inner wall of the cooling space 17, thereby further improving the cooling effect.

[0043] An oil inlet passage 22 and an oil outlet passage 23 are arranged in the middle connection shell 53. The oil inlet passage 22 and the oil outlet passage 23 communicate the rotating shaft 16 with the rotating part in the middle connection shell 53. An oil inlet pipe 24 communicating with the oil inlet passage 22 and an oil outlet pipe communicating with the oil outlet passage 23 are assembled on the middle connection shell 53. By inputting lubricating oil into the oil inlet pipe 24, it enters through the oil inlet passage 22 and lubricates the rotating part between the rotating shaft 16 and the middle connection shell 53. The lubricated lubricating oil is discharged from the oil outlet passage 23 and through the oil outlet pipe from the middle connection shell 53, so as to ensure the rotational stability between the middle connection shell 53 and the rotating shaft 16, that is, to ensure the rotational stability between the turbine and the impeller.

[0044] In some embodiments, an axial hole 25 for assembling the rotating shaft 16 is axially opened in the middle of the middle connection shell 53. The axial hole 25 penetrates through both ends of the middle connection shell 53. Installation notches 26 are respectively opened at both ends of the axial hole 25. A rotating part 27 is assembled in the installation notches 26. The rotating part 27 uses a high-temperature-resistant bearing. The rotating part is sleeved on the rotating shaft 16, so that the rotating shaft 16 can rotate in the middle connection shell 53.

[0045] In some embodiments, the oil inlet passage 22 and the oil outlet passage 23 are at least in communication with the mounting notch 26, that is, the lubricating oil directly flows to the rotating member; of course, the oil inlet passage 22 can also be communicated with the middle position of the axial hole 25. Due to the rotational clearance between the inner wall of the axial hole 25 and the outer wall of the rotating shaft 16, the lubricating oil can flow toward the rotating member through the rotational clearance, which can lubricate the entire rotating shaft 16 and the rotating member, and further improve the rotational stability of the rotating shaft 16 in the middle connection housing 53.

[0046] In some embodiments, the middle portions of the two end faces of the middle connection housing 53 are respectively recessed inward to form annular notches 28, and the mounting notch 26 is located at the bottom of the annular notch 28; a housing cover 29 that seals the annular notch 28 is detachably assembled on the middle connection housing 53 by countersunk screws. A relief through hole for the transmission of the rotating shaft 16 is provided in the middle of the housing cover 29, and the axis of the relief through hole is collinear with the axis of the axial hole 25; between the inner side wall of the housing cover 29 and the bottom wall of the annular notch 28, and between the inner wall of the relief through hole and the rotating shaft 16, sealing members 30 are respectively provided. The sealing members 30 can be made of high-temperature-resistant annular sealing rings; by using the housing cover 29, the rotating member can be sealed and protected, and at the same time, through the arrangement of the sealing members 30, the sealing ability between the housing cover 29 and the middle connection housing 53, and between the housing cover 29 and the rotating shaft 16 is improved, reducing the possibility of lubricating oil leakage.

[0047] In some embodiments, the middle portions of the outer sides of the two housing covers 29 respectively extend outward beyond the end face of the middle connection housing 53 to form docking plugs 31. Docking slots corresponding to the docking plugs 31 are respectively provided on the volute 10 and the supercharger housing 11. Through the cooperation of the docking plugs 31 and the symmetric slots, the docking accuracy between the volute 10, the supercharger housing 11 and the middle connection housing 53 is enhanced; at both ends of the outer periphery of the middle connection housing 53, fixed connection rings 32 are respectively provided, and the fixed connection rings 32 are respectively connected to the volute 10 and the supercharger housing 11 through fixed connectors 33 (countersunk screws). This structure also facilitates the assembly and disassembly between the middle connection housing 53 and the volute 10 and the supercharger housing 11.

[0048] In some embodiments, an exhaust pipe 34 is connected to the exhaust gas outlet 13. One end of the exhaust pipe 34 is connected to the exhaust gas outlet 13 through a flange, and the other end is bent by 90° and then arranged in a direction opposite to the exhaust gas inlet 12. The exhausted exhaust gas is led through the exhaust pipe 34. The end of the exhaust pipe 34 has a docking flange 35 for facilitating connection with an exhaust gas filtering device.

[0049] In some implementations, one end of the water inlet pipe 18 is assembled to one side of the intermediate connection shell 53 through the first threaded joint 36, and the other end of the water inlet pipe 18 is equipped with a water inlet silicone connection pipe 37, and the middle part of the water inlet pipe 18 forms a 90-degree bend section; one end of the return pipe 19 is assembled to the other side of the intermediate connection shell 53 through the second threaded joint 38, and the other end of the return pipe 19 is equipped with a return silicone connection pipe 39, and the middle part of the return pipe 19 forms a bend section through three bends. The threaded joint is used to facilitate the assembly and disassembly of the water inlet pipe 18, the return pipe 19 and the intermediate connection shell 53. Among them, the return pipe 19 line undergoes two 90-degree bends and then an obtuse bend.

[0050] In some embodiments, the mixed air outlet 15 of the supercharged shell 11 is connected to a mixed air outlet pipe 40 and an exhaust pipe 41. The mixed air outlet pipe 40 is connected to the mixed air outlet 15 of the supercharged shell 11 through a first clamp 42, and the other end of the mixed air outlet pipe 40 is connected to one end of the exhaust pipe 41 through a second clamp 43. The other end of the exhaust pipe 41 is connected to a pipe assembly, and the connecting end of the exhaust pipe 41 and the mixed air outlet pipe 40 is a 90-degree bend section; the pipe assembly includes a first silicone tube 44, a second silicone tube 45, and an intermediate pipe 46; the first silicone tube is connected to the exhaust pipe 41 through a spring throat clamp, the intermediate pipe 46 is connected to the first silicone tube 44 through a spring throat clamp, and the second silicone tube 45 is connected to the intermediate pipe 46 through a spring throat clamp, wherein the second silicone tube 45 adopts a silicone tube with a reduced diameter at the end to facilitate the docking and connection of other pipes; the use of spring throat clamps facilitates the assembly and disassembly of pipes.

[0051] In some implementations, a portion of the head end of the gas mixture discharge pipe 40 is inserted into the gas mixture discharge port 15, and the outer peripheral wall of the gas mixture discharge port 15 and the outer peripheral wall of the gas mixture discharge pipe 40 respectively extend outwardly with a clamping portion 47, and the two clamping portions form a conical structure arrangement, and a sealing gasket 48 is assembled between the two clamping portions 47 and clamped on the two clamping portions 47 by a first clamp, thereby forming a connection between the gas mixture discharge pipe 40 and the gas mixture discharge port 15, which is convenient for assembly and disassembly, and also improves the connection stability and sealing; similarly, the above-mentioned connection structure can also be used to connect the gas mixture discharge pipe 40 and the exhaust pipe 41.

[0052] In some implementations, the arrangement direction of the exhaust pipe 41 is the same as the arrangement direction of the water inlet silicone connecting pipe and the water return silicone connecting pipe, so that the structural layout of the entire supercharger device is more standardized.

[0053] In some embodiments, a pipe support is assembled on the exhaust pipe 41. The pipe support includes an annular member 49 that clamps the outer circumference of the exhaust pipe 41, and a frame body 50 that is connected to the annular member 49 by screws. The frame body 50 is located on one side of the outer axis of the exhaust pipe 41. A connecting screw 51 is assembled on the frame body 50 to facilitate the stable installation of the exhaust pipe 41 through the pipe support. The annular member is an open annular sheet. The frame body is an L-shaped mounting block.

[0054] In some embodiments, the intermediate connection shell 53 is formed by casting. To facilitate the formation of the cooling space 17 during the casting process, a part of the cooling space 17 penetrates through the end face of the intermediate connection shell 53. To prevent the leakage of cooling water in the cooling space 17, a sealing pressure ring 52 is assembled on the intermediate connection shell 53 for sealing.

[0055] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas engine supercharger device, comprising a volute and a supercharger housing, wherein the volute has an exhaust gas inlet, an exhaust gas outlet, and a turbine, wherein the exhaust gas enters the volute from the exhaust gas inlet, drives the turbine to rotate, and is discharged from the exhaust gas outlet; The supercharger shell has a mixed gas inlet, a mixed gas outlet, and an impeller. The impeller and the turbine are coaxially arranged. The mixed gas enters the supercharger shell through the mixed gas inlet, and is driven by the impeller to form a high-pressure mixed gas, which is discharged from the mixed gas outlet. The volute and the supercharger shell are fixedly connected by an intermediate connecting shell, in which a rotating shaft is rotatably arranged, one end of the rotating shaft extends into the volute for assembly of the turbine, and the other end extends into the supercharger shell for assembly of the impeller; It is characterized in that A cooling space is arranged in the middle connecting shell, and the cooling space is arranged close to the volute. The middle connecting shell is equipped with a water inlet pipe and a water return pipe connected with the cooling space. A temperature sensor for detecting the temperature of the middle connecting shell is installed on one side of the middle connecting shell close to the volute, and a flow sensor for detecting the water flow rate in the water inlet pipe is installed on the water inlet pipe. The cooling space is distributed in an annular manner along the axial direction in the intermediate connecting shell; the space in the cooling space is larger at one end close to the volute than at the end far from the volute, and the larger end in the cooling space includes a space 1 arranged along the axial direction of the rotating shaft and close to the rotating shaft, and a space 2 distributed along the radial direction of the intermediate connecting shell and close to the volute; An oil inlet channel and an oil outlet channel are arranged in the middle connecting shell, and the oil inlet channel and the oil outlet channel connect the rotating shaft and the rotating part in the middle connecting shell. The middle connecting shell is equipped with an oil inlet pipeline connected with the oil inlet channel and an oil outlet pipeline connected with the oil outlet channel.

2. The gas engine supercharger device according to claim 1, characterized in that, An axial hole for assembling the rotating shaft is axially opened in the middle connecting shell, and the axial hole passes through both ends of the middle connecting shell. Installation slots are respectively opened at both ends of the axial hole, and a rotating part is assembled in the installation slot, and the rotating part is sleeved on the rotating shaft; the oil inlet channel and the oil outlet channel are at least connected with the installation slot.

3. The gas engine supercharger device according to claim 1, characterized in that, The middle parts of the two end surfaces of the intermediate connecting shell are respectively recessed inward to form an annular notch, and the installation notch is located at the bottom of the annular notch; A shell cover is detachably mounted on the middle connecting shell to seal the annular notch, a clearance hole for the rotation shaft to drive is opened in the middle of the shell cover, and the axis of the clearance hole is arranged in a colinear manner with the axis of the axial hole; Seals are respectively arranged between the bottom wall of the annular notch on the inner side wall of the shell cover and between the inner wall of the through hole and the rotating shaft.

4. The gas engine supercharger device according to claim 3, characterized in that, The middle parts of the outer sides of the two shell covers respectively extend outwards to form docking platforms that exceed the end faces of the intermediate connecting shells, and the vortex shell and the supercharger shell are respectively provided with docking slots corresponding to the docking platforms; Fixed connection rings are respectively arranged at two ends of the outer circumference of the intermediate connection shell, and the fixed connection rings are respectively connected to the volute shell and the supercharger shell through fixed connection pieces.

5. The gas engine supercharger device according to claim 1, characterized in that, The exhaust gas outlet is connected to an exhaust pipe, one end of the exhaust pipe is connected to the exhaust gas outlet through a flange, and the other end is bent 90 degrees to form an arrangement in the opposite direction to the exhaust gas inlet.

6. The gas engine supercharger device according to claim 1, characterized in that, One end of the water inlet pipe is assembled to one side of the middle connecting shell through a first threaded joint, and the other end of the water inlet pipe is assembled with a water inlet silicone connecting pipe, and a 90-degree bend section is formed in the middle of the water inlet pipe; One end of the return water pipe is assembled to the other side of the intermediate connection shell through a second threaded joint. The other end of the return water pipe is assembled with a return water silica gel connecting pipe. The middle part of the return water pipe forms a bent section through three bends.

7. The gas engine supercharger device according to claim 6, characterized in that, The gas mixing discharge port of the supercharging shell is connected with a gas mixing discharge connecting pipe and an exhaust connecting pipe. The gas mixing discharge connecting pipe is connected to the gas mixing discharge port of the supercharging shell through a first clamp. The other end of the gas mixing discharge connecting pipe is connected to one end of the exhaust connecting pipe through a second clamp. The other end of the exhaust connecting pipe is connected with a connecting pipe assembly; the connecting end of the exhaust connecting pipe and the gas mixing discharge connecting pipe is a 90-degree bent section; The arrangement direction of the exhaust connecting pipe is the same as that of the water inlet silica gel connecting pipe and the return water silica gel connecting pipe.

8. The gas engine supercharger device according to claim 7, characterized in that, A connecting pipe support is assembled on the exhaust connecting pipe. The connecting pipe support includes an annular part that clamps the exhaust connecting pipe and a frame body that is connected to the annular part by screws. The frame body is on the outer axial side of the exhaust connecting pipe, and a connecting screw is assembled on the frame body.

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