Air inlet structure of supercharged natural gas engine

Abstract

The utility model belongs to the technical field of natural gas engines, and particularly relates to a supercharged natural gas engine air inlet structure which comprises an air inlet bent pipe, flanges are connected to the outer side surfaces of the two ends of the air inlet bent pipe, and through limiting holes are formed in the surfaces of one sides of the flanges. Through the mutual cooperation of the mounting plate, the bearing, the rotating shaft and the fan blades, when mixed gas in the gas inlet elbow flows, the mixed gas can drive the fan blades on the rotating shaft to rotate in the bearing, so that the original laminar flow state of the gas is broken, the turbulent flow effect of the mixed gas is improved, and the service life of the gas inlet elbow is prolonged. Secondly, due to the arrangement of the protection mechanism, after the air inlet elbow is installed at a designated position through a flange, the end, exposed in the environment, of a bolt protrusion can be shielded by installing a blocking cover, so that the contact between the end, exposed in the environment, of the bolt protrusion is reduced, corrosion of the environment to the bolt is weakened, and the service life of the bolt is prolonged; therefore, the service life of the bolt is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas engines, and in particular relates to an air intake structure of a supercharged natural gas engine. Background Art

[0002] A supercharged natural gas engine is an engine that uses a high-pressure ratio multi-stage compressor. Its main working principle is to pressurize natural gas from a low-pressure state to a high-pressure state through a compressor.

[0003] When a supercharged natural gas engine is in use, the mixture of natural gas and air is generally transported to the intake manifold of the engine through an intake elbow. However, the general intake elbow is set in a right-angle arc shape. When the natural gas engine is working, the mixed gas of natural gas and air will directly enter the intake manifold in a straight line through the intake elbow after passing through the electronic throttle. This results in poor turbulence of the mixed gas, resulting in insufficient mixing of natural gas and air, thereby affecting the operation of the supercharged natural gas engine.

[0004] Therefore, the utility model provides an air intake structure of a supercharged natural gas engine to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an intake structure for a supercharged natural gas engine, aiming to solve the problem in the prior art that the mixed gas after mixing natural gas and air enters the intake manifold in a straight flow manner through the intake elbow, resulting in poor turbulence effect of the mixed gas.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a supercharged natural gas engine intake structure, including an intake bend pipe, the outer surfaces of the two ends of the intake bend pipe are connected with flanges, a through-limiting hole is opened on one side surface of the flange, a bolt is connected through the inside of the limiting hole, an inner surface of one end of the intake bend pipe is connected with a mounting plate, a bearing is connected to the surface of one end of the mounting plate, one end of a rotating shaft is connected to the inner surface of the bearing, a fan blade is connected through one end of the rotating shaft, and a protective mechanism is also provided on one side surface of the flange outside the limiting hole.

[0007] In order to protect the protruding end of the bolt, as a preferred intake structure of a supercharged natural gas engine of the utility model, the protection mechanism includes: a thread groove, a surface thread, a baffle, a sealing ring, a groove and a protrusion. A thread groove is provided on one side surface of the flange outside the limiting hole, and the inner surface of the thread groove is connected with a surface thread. The surface thread is provided on the outer surface at one end of the baffle, and a sealing ring is also connected to the outer surface at one end of the baffle, one end of the sealing ring extends into the groove provided in the flange, and a protrusion is connected to the outer surface of the other end of the baffle.

[0008] In order to realize that the airflow can drive the fan blades to rotate, as a preferred intake structure of a supercharged natural gas engine of the utility model, the mounting plates are symmetrically arranged in two groups about the transverse center axis of the bearing, and the fan blades are fixedly connected to the rotating shaft.

[0009] In order to realize the disassembly and assembly of the baffle cover, as a preferred intake structure of a supercharged natural gas engine of the utility model, the baffle cover is threadedly connected by a surface thread and a thread groove.

[0010] In order to increase the sealing performance between the baffle cover and the flange, as a preferred intake structure of a supercharged natural gas engine of the utility model, the sealing ring is made of rubber material, and the sealing ring forms a snap-fit ​​structure with the flange through a snap groove.

[0011] In order to increase the friction between the operator's hand and the shield and cover one end of the bolt protrusion, as a preferred intake structure of a supercharged natural gas engine of the utility model, the protrusions are distributed in a circular array on the outer surface of the shield, and the size of the internal space of the shield is larger than the size of the bolt.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model realizes mutual cooperation among the mounting plate, the bearing, the rotating shaft and the fan blades. When the mixed gas in the intake elbow flows, the mixed gas drives the fan blades on the rotating shaft to rotate in the bearings, thereby breaking the original laminar flow state of the gas, increasing the turbulent effect of the mixed gas, and making the natural gas and air better mixed together.

[0014] The utility model provides a protective mechanism, and when the air intake elbow is installed at a specified position through a flange, a shield can be installed to cover the end of the bolt protrusion exposed to the environment, so that the contact between the protruding end of the bolt and the ambient air is reduced, and environmental corrosion to the bolt is weakened, thereby increasing the service life of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the fan blade of the utility model;

[0018] Figure 3 This is a schematic diagram of the partial explosion structure of the flange of the utility model;

[0019] Figure 4 It is a schematic diagram of the exploded structure of the local section of the thread groove of the utility model.

[0020] In the figure: 1. Inlet elbow; 2. Flange; 3. Limit hole; 4. Bolt; 5. Mounting plate; 6. Bearing; 7. Rotating shaft; 8. Fan blade; 9. Thread groove; 10. Surface thread; 11. Shield; 12. Sealing ring; 13. Slot; 14. Bump. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 The utility model provides the following technical solutions: a supercharged natural gas engine intake structure, including an intake elbow 1, flanges 2 are connected to the outer surfaces at both ends of the intake elbow 1, a limiting hole 3 is provided on one side of the flange 2, a bolt 4 is connected through the limiting hole 3, a mounting plate 5 is connected to the inner surface at one end of the intake elbow 1, a bearing 6 is connected to the surface of one end of the mounting plate 5, one end of the rotating shaft 7 is connected to the inner surface of the bearing 6, a fan blade 8 is connected through one end of the rotating shaft 7, and a protective mechanism is also provided on the surface of one side of the flange 2 outside the limiting hole 3.

[0023] Preferably: the protection mechanism includes: a thread groove 9, a surface thread 10, a baffle 11, a sealing ring 12, a slot 13 and a protrusion 14. A thread groove 9 is provided on one side surface of the flange 2 outside the limiting hole 3. The inner surface of the thread groove 9 is connected to the surface thread 10. The surface thread 10 is provided on the outer surface at one end of the baffle 11. The outer surface at one end of the baffle 11 is also connected to a sealing ring 12. One end of the sealing ring 12 extends into the slot 13 provided inside the flange 2. The outer surface of the other end of the baffle 11 is connected to a protrusion 14.

[0024] During specific use, the shield 11 is screwed into the thread groove 9 through the surface thread 10, so that the position of the shield 11 can be fixed on the flange 2, so that the shield 11 can cover and protect the protruding end of the bolt 4. At the same time, the sealing ring 12 will also be elastically engaged in the groove 13, thereby increasing the sealing between the shield 11 and the flange 2, making it difficult for external air to enter the shield 11, thereby reducing the contact between the protruding end of the bolt 4 and the ambient air.

[0025] Preferably, two groups of mounting plates 5 are symmetrically arranged about the transverse center axis of the bearing 6 , and the fan blades 8 and the rotating shaft 7 are fixedly connected.

[0026] During specific use, when the fan blades 8 are driven by the circulating gas, the fan blades 8 will drive the rotating shaft 7 to rotate in the bearing 6, so that the fan blades 8 can rotate in place.

[0027] Preferably, the blocking cover 11 is threadedly connected to the thread groove 9 through the surface thread 10 .

[0028] During specific use, the shield 11 can be screwed into the thread groove 9 through the surface thread 10 , so that the shield 11 is fixed on the flange 2 .

[0029] Preferably, the sealing ring 12 is made of rubber, and the sealing ring 12 forms a clamping structure with the flange 2 through the clamping groove 13 .

[0030] During specific use, when the sealing ring 12 moves to the position of the slot 13 , the sealing ring 12 will be elastically engaged in the slot 13 , thereby increasing the sealing between the shield 11 and the flange 2 , making it difficult for air to enter the shield 11 .

[0031] Preferably, the protrusions 14 are distributed in a ring array on the outer surface of the shield 11 , and the size of the internal space of the shield 11 is larger than the size of the bolts 4 .

[0032] During specific use, the protrusions 14 are distributed in a circular array on the outer surface of one end of the shield 11, so that when the operator twists the shield 11, the protrusions 14 can increase the friction with the operator's hand, making the shield 11 easier to twist. The internal space of the shield 11 is larger than the size of the bolt 4, so that the raised end of the bolt 4 will completely enter the shield 11.

[0033] Working principle: When the intake structure of the supercharged natural gas engine is used, the intake elbow 1 can be installed at the specified position by passing the bolt 4 through the limit hole 3 on the flange 2, so that the mixed gas of natural gas and air can be transported to the intake manifold of the supercharged natural gas engine through the intake elbow 1. When the mixed gas flows in the intake elbow 1, the flowing gas will drive the rotating shaft 7 on the fan blade 8 to rotate in the bearing 6. When the intake elbow 1 is transporting gas, the rotating fan blade 8 will break the original laminar state of the gas, thereby increasing the turbulent effect of the mixed gas and making the natural gas and air better mixed together. In this way, the mixed gas entering the supercharged natural gas engine is more uniform. Secondly, when the intake elbow 1 is used to transport gas, the rotating fan blade 8 will break the original laminar state of the gas, thereby increasing the turbulent effect of the mixed gas and making the natural gas and air better mixed together. After the air bend pipe 1 is installed in the specified position, one end of the bolt 4 will protrude on one side of the flange 2. At this time, the shield 11 is screwed into the thread groove 9 through the surface thread 10, so that the position of the shield 11 can be fixed on the flange 2, so that the shield 11 can cover and protect the protruding end of the bolt 4. At the same time, when the shield 11 is screwed into the thread groove 9 through the surface thread 10, the sealing ring 12 set at one end of the shield 11 will also move to the groove 13, so that the sealing ring 12 will be elastically engaged in the groove 13, thereby increasing the sealing between the shield 11 and the flange 2, making it difficult for external air to enter the shield 11, thereby reducing the contact between the protruding end of the bolt 4 and the ambient air, weakening the corrosion of the environment to the bolt 4, and thus increasing the service life of the bolt 4.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A supercharged natural gas engine intake structure, comprising an intake elbow (1), characterized in that: The outer surfaces of both ends of the air intake bend pipe (1) are connected to flanges (2), one side surface of the flange (2) is provided with a through-limiting hole (3), a bolt (4) is connected through the inside of the limiting hole (3), the inner surface of one end of the air intake bend pipe (1) is connected to a mounting plate (5), one end surface of the mounting plate (5) is connected to a bearing (6), the inner surface of the bearing (6) is connected to one end of a rotating shaft (7), one end of the rotating shaft (7) is connected to a fan blade (8), and a protective mechanism is also provided on one side surface of the flange (2) outside the limiting hole (3).

2. The air intake structure of a supercharged natural gas engine according to claim 1, characterized in that: The protection mechanism comprises: a thread groove (9), a surface thread (10), a baffle (11), a sealing ring (12), a slot (13) and a protrusion (14); a thread groove (9) is provided on one side surface of the flange (2) outside the limiting hole (3); the inner surface of the thread groove (9) is connected to the surface thread (10); the surface thread (10) is provided on the outer surface at one end of the baffle (11); the outer surface at one end of the baffle (11) is also connected to the sealing ring (12); one end of the sealing ring (12) extends into the slot (13) provided inside the flange (2); the outer surface at the other end of the baffle (11) is connected to the protrusion (14).

3. The air intake structure of a supercharged natural gas engine according to claim 1, characterized in that: The mounting plates (5) are symmetrically arranged in two groups about the transverse center axis of the bearing (6), and the fan blades (8) are fixedly connected to the rotating shaft (7).

4. The air intake structure of a supercharged natural gas engine according to claim 2, characterized in that: The blocking cover (11) is threadedly connected to the thread groove (9) via the surface thread (10).

5. The air intake structure of a supercharged natural gas engine according to claim 2, characterized in that: The sealing ring (12) is made of rubber material, and the sealing ring (12) forms a snap-fit ​​structure with the flange (2) through the snap-fit ​​groove (13).

6. The air intake structure of a supercharged natural gas engine according to claim 2, characterized in that: The protrusions (14) are distributed in a ring array on the outer surface of the shield (11), and the size of the internal space of the shield (11) is larger than the size of the bolts (4).

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