Gas generator set

Abstract

An electric cabinet, a generator, an engine, a cooling fan and a cooling water tank are sequentially arranged in a shell in the length direction, air inlets are formed in the positions, corresponding to the electric cabinet and the generator, of the shell in the circumferential direction, an air outlet is formed in the end, close to the cooling water tank, of the shell, and an exhaust pipe assembly is connected to the engine; the exhaust pipe assembly comprises an exhaust pipe head section, an exhaust pipe middle section and an exhaust pipe tail section, the exhaust pipe head section is provided with a vertically-arranged three-way catalytic pipe, an inner cavity of the three-way catalytic pipe is provided with multiple layers of three-way catalytic inner cores, and the adjacent three-way catalytic inner cores at the same height are separated through U-shaped elastic pieces. The service life of the three-way catalytic element of the gas generator set is prolonged remarkably, the performance of the three-way catalytic element of the gas generator set is improved remarkably, particularly, the tail gas treatment capacity can be adjusted in a self-adaptive mode according to the tail gas emission load, the replacement difficulty of the three-way catalytic element is greatly reduced, the silencing effect of the gas generator set is optimized, and the service life of the gas generator set is prolonged. And the tail gas treatment cost of the gas generator set is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas generators, and particularly relates to a gas generator set. Background Art

[0002] The previously developed residential and commercial gas generator sets (CN1127972A) include a housing. Inside the housing, an electric control box, a generator, an engine, a cooling fan, and a cooling water tank are sequentially arranged along the length direction. Intakes are respectively provided on the circumferential direction of the housing at positions corresponding to the electric control box and the generator, and an exhaust outlet is provided at one end close to the cooling water tank. The cooling fan can attract external air flow to enter the housing through the intake, flow through the corresponding electric control box and / or generator, then sequentially pass through the engine and the cooling water tank, and be discharged out of the housing through the exhaust outlet. Among them, the housing is surrounded by a chassis, a front panel, a rear panel, a left panel, a right panel, and a cover plate. Adjacent panels are connected by columns. The intakes are arranged on the front panel, the rear panel, and the left panel, and the exhaust outlet is arranged on the right panel. This structure is simple and compact, facilitating manufacturing and assembly.

[0003] Applications show that although the aforementioned gas generator set has advantages such as high space utilization rate, good heat dissipation performance, compact structure, and good stability, there are still some problems, including that the service life and performance of the three-way catalytic element on its exhaust pipe assembly need to be further optimized, it is inconvenient to replace the three-way catalytic element, the sound insulation effect of the gas generator set needs to be optimized, and the exhaust gas treatment cost needs to be further reduced. Therefore, it is necessary to further improve the existing gas generator set. Summary of the Invention

[0004] To at least solve the technical problems mentioned in the background art, the purpose of the present invention is to provide a gas generator set.

[0005] The present invention adopts the following technical solutions.

[0006] A gas generator set includes a housing. Inside the housing, an electric control box, a generator, an engine, a cooling fan, and a cooling water tank are sequentially arranged along the length direction. Intakes are respectively provided on the circumferential direction of the housing at positions corresponding to the electric control box and the generator, and an exhaust outlet is provided at one end close to the cooling water tank. An exhaust pipe assembly is connected to the engine. The exhaust pipe assembly includes an exhaust pipe head section, an exhaust pipe middle section, and an exhaust pipe tail section. The exhaust pipe head section has a vertically arranged three-way catalytic tube, and the inner cavity of the three-way catalytic tube has multiple layers of three-way catalytic inner cores. Adjacent three-way catalytic inner cores at the same height are separated by U-shaped elastic pieces.

[0007] In order to further improve the exhaust gas treatment effect of a gas-fired generator set, the three-way catalytic tube includes a coaxial outer shell and inner shell. Heat-insulating materials are filled between the outer shell and the inner shell. A ring-shaped U-shaped elastic sheet is arranged on the inner wall of the inner shell. A ring-shaped three-way catalytic inner core is arranged in the groove of the U-shaped elastic sheet, and a columnar three-way catalytic inner core is arranged in the middle of the U-shaped elastic sheet.

[0008] In order to more smoothly achieve the exhaust gas emission of the gas-fired generator set, the first side wall of the U-shaped elastic sheet is fixedly connected to the inner wall of the inner shell, and several through holes are arranged at the lower part of the U-shaped elastic sheet.

[0009] Further, in the initial state, the initial angle between the second side wall of the U-shaped elastic sheet and the axis of the three-way catalytic tube is 8-15°; in the working state, the angle between the second side wall of the U-shaped elastic sheet and the axis of the three-way catalytic tube becomes smaller relative to the initial angle. With such a scheme, the exhaust gas treatment capacity can be adaptively adjusted according to the exhaust gas emission load.

[0010] In order to save manufacturing costs while making it more convenient to replace the three-way catalytic inner core, the outer wall of the three-way catalytic tube is cylindrical.

[0011] In order to more smoothly achieve the exhaust gas emission of the gas-fired generator set, there is a cavity structure between the ring-shaped three-way catalytic inner core and the bottom wall of the inner cavity of the U-shaped elastic sheet.

[0012] Preferably, the tail section of the exhaust pipe is arranged vertically, a muffler is arranged on the tail section of the exhaust pipe, and the head section, middle section and tail section of the exhaust pipe together form a U-shaped structure.

[0013] Further, the gas-fired generator set further includes an ECU control system for controlling the air-fuel ratio of the engine. Through the ECU control system, the air-fuel ratio of the engine and the above-mentioned three-way catalytic inner core are coordinated to further optimize the exhaust gas treatment effect of the generator set.

[0014] Beneficial effects: By adopting the scheme of the present invention, not only the service life and performance of the three-way catalytic element of the gas-fired generator set are significantly improved, especially the exhaust gas treatment capacity can be adaptively adjusted according to the exhaust gas emission load, but also the difficulty of replacing the three-way catalytic element is greatly reduced, the silencing effect of the gas-fired generator set is optimized, and the exhaust gas treatment cost of the gas-fired generator set is reduced. Description of the Drawings

[0015] Figure 1 、 Figure 2 It is the structure diagram of the gas-fired generator set in Embodiment 1; Figure 3 It is the exploded view of the internal structure of the gas-fired generator set in Embodiment 1; Figure 4 It is the external structure diagram of the three-way catalytic tube of the exhaust pipe assembly of the gas-fired generator set in Embodiment 1; Figure 5 It is a sectional view structure diagram of the three-way catalytic tube of the exhaust pipe assembly of the gas generator set in Embodiment 1; Figure 6 It is a top view of the three-way catalytic tube of the exhaust pipe assembly of the gas generator set in Embodiment 1; Figure 7 It is a structure diagram of the U-shaped shrapnel and the annular three-way catalytic inner core of the three-way catalytic tube in Embodiment 1; Figure 8 、 Figure 9 It is a schematic diagram of the three-way catalytic tube in different pressure fluid states in Embodiment 1. Specific implementation manners

[0016] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0017] Combined with Figures 1 to 3As shown, a gas-fired generator set (the main structure refers to the residential and commercial gas-fired generator sets developed in the early stage, see the literature CN1127972A for details), including a housing in the form of a shelter structure. Inside the housing, an electric control box 2, a generator 3, an engine 4, a cooling fan 5 and a cooling water tank 6 are arranged in sequence from left to right along the length direction. A gas system 7 is also provided on one side of the generator 3 and the engine 4. An exhaust pipe assembly is connected to the engine 4. Among them, the housing includes a chassis 11 and a front panel 12, a rear panel 13, a left panel 14 and a right panel 15 surrounding the outer edge of the chassis 11. The top is closed by a cover plate 16. Four vertical columns 17 extending upward are fixed at the four corner positions of the chassis 11 to connect the lateral edges of adjacent panels. The cover plate 16 is connected to one of the front panel 12, the rear panel 13, the left panel 14 and the right panel 15 in a hinged manner. The outer surfaces of the front panel 12, the rear panel 13 and the cover plate 16 are all designed with arc-shaped curved surfaces. Correspondingly, each column also adopts an arc-shaped design, that is, the transverse section of the column 17 is an arc-shaped structure protruding outward. The front panel 12, the rear panel 13 and the left panel 14 are all provided with air inlets. The air inlets on the front panel 13 and the rear panel 14 are facing the generator 3 and the engine 4, and the air inlet on the left panel 14 is facing the electric control box 2. A grid-shaped baffle 1c is provided inside each air inlet to block sundries from entering the interior of the housing. An air outlet is formed on the right panel 15. The right panel 15 is integrally designed with a hollow structure, including a stainless steel mesh cover and a first side mesh plate and a second side mesh plate fixed to the upper and lower ends of the stainless steel mesh cover. The two ends of the first side mesh plate and the second side mesh plate are respectively fixed to the corresponding columns 17 to form a support. The installation position of the electric control box 2 in the housing is higher than the installation positions of the generator 3 and the engine 4 to leave a passage so that the air flow entering the housing from the air inlet on the left panel 14 can blow directly to the generator 3. Among them, the gas system 7 is connected to the engine 4. The chassis 11 is a cuboid structure. The electric control box 2 and the cooling water tank 6 are respectively located at the left and right ends of the chassis 11 in the length direction. The cooling water tank 6 is respectively connected to the coolant inlet and outlet of the engine 4 through an upper cooling pipe and a lower cooling pipe to form a coolant circulation. The cooling fan 5 is integrated at the end of the engine 4 and is facing the cooling water tank 6 to continuously cool the coolant in the cooling water tank 6; at one end of the electric control box 2, there is an electric control box mounting plate vertically arranged and fixed to the chassis 11, and a distribution box 22 is provided at the other end of the electric control box 2; shock-absorbing devices 8 are installed at the bottoms of the generator 3 and the engine 4.

[0018] In this embodiment, in combination with Figures 4 to 7As shown, the exhaust pipe assembly includes a front section of the exhaust pipe, a middle section 32 of the exhaust pipe, and a rear section 33 of the exhaust pipe. The rear section 33 of the exhaust pipe is arranged vertically, and a muffler 41 is provided on the rear section 33 of the exhaust pipe. The front section of the exhaust pipe, the middle section 32 of the exhaust pipe, and the rear section 33 of the exhaust pipe together form a U-shaped structure. The front section of the exhaust pipe has a vertically arranged three-way catalytic pipe 31. The outer wall of the three-way catalytic pipe 31 is cylindrical, and the inner cavity of the three-way catalytic pipe 31 has multiple layers of three-way catalytic inner cores. The adjacent three-way catalytic inner cores at the same height are separated by a U-shaped elastic sheet 37. Among them, the three-way catalytic pipe 31 includes a coaxial outer shell and inner shell. Heat insulation material 30 is filled between the outer shell and the inner shell. A ring-shaped U-shaped elastic sheet 37 is provided on the inner wall of the inner shell. A ring-shaped three-way catalytic inner core 35 is arranged in the groove 36 of the U-shaped elastic sheet 37, and a columnar three-way catalytic inner core 34 is arranged in the middle of the U-shaped elastic sheet 37. There is a cavity structure between the ring-shaped three-way catalytic inner core 35 and the bottom wall of the inner cavity of the U-shaped elastic sheet 37; the multiple core bodies of the columnar three-way catalytic inner core 34 are connected into a whole through a support skeleton 39. The first side wall of the U-shaped elastic sheet 37 is fixedly connected to the inner wall of the inner shell, and several through holes 38 are provided at the lower part of the U-shaped elastic sheet 37. In the initial state, the initial angle between the second side wall of the U-shaped elastic sheet 37 and the axis of the three-way catalytic pipe 31 is 10°; in the working state, the angle between the second side wall of the U-shaped elastic sheet 37 and the axis of the three-way catalytic pipe 31 becomes smaller relative to the initial angle.

[0019] When replacing the three-way catalytic element of the existing gas generator set (document CN1127972A), first remove the three-way catalytic pipe 31 from the engine, then cut off the pipe body at the part where the three-way catalytic core is located, then replace it with a new pipe section with a three-way catalytic core and weld it, and finally install the three-way catalytic pipe 31. The whole process takes no less than one hour. When replacing the three-way catalytic element in this embodiment, first remove the three-way catalytic pipe 31 from the engine, then sequentially take out the columnar three-way catalytic inner core 34 and the ring-shaped three-way catalytic inner core 35 from the inner cavity of the three-way catalytic pipe 31, then install new three-way catalytic inner cores, and finally reinstall the three-way catalytic pipe 31. The whole process takes about fifteen minutes and is very convenient.

[0020] In one application solution, in the initial state (non-working), the initial angle between the second side wall of the U-shaped elastic sheet 37 and the axis of the three-way catalytic pipe 31 is 10°, as Figure 8As shown in the figure; during the working state, when the exhaust gas treatment load entering the three-way catalytic converter 31 is small (the amount of exhaust gas per unit time is small), the deformation of the U-shaped spring piece 37 is small (for example, the angle between the second side wall of the U-shaped spring piece 37 and the axis of the three-way catalytic converter 31 is about 8° at this time), and the variation range of the distance between the annular three-way catalytic inner core 35 and the bottom of the U-shaped spring piece 37 is also small; when the exhaust gas treatment load entering the three-way catalytic converter 31 is large (the amount of exhaust gas per unit time is large), the deformation of the U-shaped spring piece 37 will be relatively large (for example, the angle between the second side wall of the U-shaped spring piece 37 and the axis of the three-way catalytic converter 31 is 6° at this time, as shown in Figure 9 ), and the variation range of the distance between the annular three-way catalytic inner core 35 and the bottom of the U-shaped spring piece 37 is also large. When the deformation of the U-shaped spring piece 37 is different, the air flow rate and velocity in the inner cavity of the U-shaped spring piece 37 will also change, the distance between the annular three-way catalytic inner core 35 and the bottom of the U-shaped spring piece 37 will also change, and the exhaust gas treatment capacity will also change, so that the exhaust gas treatment capacity can be adaptively adjusted according to the exhaust gas emission load.

[0021] In terms of the silencing effect, the U-shaped spring piece 37 with the aforementioned specific arrangement can effectively guide part of the air flow in the three-way catalytic converter 31 to flow radially outward first, Figure 5 as shown by the arrow in the figure for the air flow direction, and then guide this part of the air flow to vortex and pass through the annular three-way catalytic inner core 35 and the U-shaped spring piece 37, thus significantly improving the silencing effect. The noise generated by the generator set was detected once at a distance of two meters from the four side walls of the generator set in an open area without other noises. The results show that for the existing gas generator set (document CN1127972A), its noise is 78 - 82 decibels, while for the gas generator set in this embodiment, its noise is 67 - 70 decibels, and the silencing effect is very good.

[0022] On the one hand, in the existing solution, the pipe body of the three-way catalytic converter 31 needs to be replaced together, while in this embodiment, the pipe body of the three-way catalytic converter 31 does not need to be replaced, saving the cost of replacing the pipe body; on the other hand, in this embodiment, the original three-way catalytic converter 31 with a thicker structure (thicker in the middle and thinner at both ends) is changed to an equal-diameter cylindrical three-way catalytic converter 31, and the original thick whole three-way catalytic inner core is replaced with a structure composed of a columnar three-way catalytic inner core 34 and multiple annular three-way catalytic inner cores 35. This specific structure of combining the whole into parts effectively improves the utilization rate of the three-way catalytic inner core, can better treat exhaust gas, improves the performance and service life of the three-way catalytic inner core, and at the same time reduces the exhaust gas treatment cost. Experiments show that under the same exhaust gas treatment conditions and for the same volume of three-way catalytic inner core, the service life of the three-way catalytic element in this embodiment can be extended by at least six months compared with the existing three-way catalytic element.

[0023] Adopting the solution of the present invention not only significantly improves the service life and performance of the three-way catalytic element of the gas generator set, especially can adaptively adjust the tail gas treatment capacity according to the tail gas emission load, but also greatly reduces the difficulty of replacing the three-way catalytic element, optimizes the silencing effect of the gas generator set, and reduces the tail gas treatment cost of the gas generator set.

[0024] Embodiment 2, referring to Embodiment 1, the difference between it and Embodiment 1 is that: an ECU control system for controlling the air-fuel ratio of the engine is arranged in the electric control box 2 on the gas generator set, and the ECU control system is used to regulate the mutual cooperation between the air-fuel ratio of the engine and the three-way catalytic inner core to further optimize the tail gas treatment effect of the generator set. Among them, the ECU control system is a conventional technology and is widely used in automobiles, so it will not be elaborated in this article.

Claims

1. A gas generator set, comprising a housing, wherein an electric control box, a generator, an engine, a cooling fan and a cooling water tank are sequentially arranged in the housing along the length direction; air inlets are respectively arranged on the circumferential direction of the housing at positions corresponding to the electric control box and the generator, and an air outlet is arranged at one end close to the cooling water tank; an exhaust pipe assembly is connected to the engine, and the exhaust pipe assembly comprises an exhaust pipe head section, an exhaust pipe middle section and an exhaust pipe tail section, and is characterized in that: The first section of the exhaust pipe is provided with a vertically arranged three-way catalytic pipe. The inner cavity of the three-way catalytic pipe has multiple layers of three-way catalytic inner cores, and adjacent three-way catalytic inner cores at the same height are separated by U-shaped elastic pieces.

2. The gas-fired generating set according to claim 1, characterized in that: The three-way catalytic pipe includes a coaxial outer shell and inner shell. Heat insulation materials are filled between the outer shell and the inner shell. A ring-shaped U-shaped elastic piece is arranged on the inner wall of the inner shell. A ring-shaped three-way catalytic inner core is arranged in the groove of the U-shaped elastic piece, and a columnar three-way catalytic inner core is arranged in the middle of the U-shaped elastic piece.

3. The gas generating set according to claim 2, characterized in that: The first side wall of the U-shaped elastic piece is fixedly connected to the inner wall of the inner shell, and several through holes are arranged at the lower part of the U-shaped elastic piece.

4. The gas generating unit according to claim 3, characterized in that: In the initial state, the initial angle between the second side wall of the U-shaped elastic piece and the axis of the three-way catalytic pipe is 8-15°; in the working state, the angle between the second side wall of the U-shaped elastic piece and the axis of the three-way catalytic pipe becomes smaller relative to the initial angle.

5. The gas generating unit according to claim 4, characterized in that: The outer wall of the three-way catalytic pipe is cylindrical.

6. The gas generating set according to claim 5, characterized in that: There is a cavity structure between the ring-shaped three-way catalytic inner core and the bottom wall of the inner cavity of the U-shaped elastic piece.

7. The gas generator set according to any one of claims 1-6, characterized in that: The tail section of the exhaust pipe is vertically arranged, and a muffler is arranged on the tail section of the exhaust pipe. The first section of the exhaust pipe, the middle section of the exhaust pipe and the tail section of the exhaust pipe together form a U-shaped structure.

8. The gas generating unit according to claim 7, wherein: It also includes an ECU control system for controlling the air-fuel ratio of the engine.

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