Supporting device for exhaust pipeline between engine and silencer of engineering machinery, exhaust system comprising supporting device, engine assembly and fracturing truck

Abstract

Relates to a supporting device for an exhaust pipeline between an engine and a silencer of engineering machinery, an exhaust system comprising the supporting device, an engine assembly and a fracturing truck. The exhaust pipeline comprises an exhaust elbow, the exhaust elbow comprises a first section extending in a first direction and connected to the silencer and a second section extending in a second direction perpendicular to the first direction and connected to the engine, and the supporting device comprises a supporting component. The supporting component is constructed to be of a plate-shaped structure and comprises a main body part and two supporting legs, the main body part extends in the third direction to cross the exhaust pipeline, the two supporting legs extend out of the main body part, and the third direction is perpendicular to the first direction and the second direction in a pairwise mode; the two supporting legs are fixed to the positions of the two radial sides, in the third direction, of the exhaust pipeline correspondingly. According to the supporting device, the vibration mode of the exhaust pipeline in the third direction with the large amplitude can be restrained, and the supporting device has enough flexibility in other directions except the third direction so that thermal expansion stress can be released.

Description

Technical Field

[0001] The utility model relates to the technical field of engines of construction machinery, and in particular to a support device for an exhaust pipe between an engine and a muffler of construction machinery, an exhaust system including the support device, an engine assembly, and construction machinery. Background Art

[0002] The exhaust system of construction machinery usually reduces the noise generated by the exhaust gas discharged during the operation of the engine through a muffler. The muffler is arranged on a muffler bracket. One end of the exhaust pipe is connected to the exhaust outlet of the engine, and the other end is connected to the muffler.

[0003] For this part of the exhaust pipe between the engine and the muffler, there is no support provided in the prior art. During the operation of the engine, the vibration of the engine causes the vibration of this exhaust pipe. A large amplitude of vibration may cause cracking at the connection part of the exhaust pipe. Moreover, due to the heat of the exhaust gas, it will also cause thermal expansion of the exhaust pipe. If the stress caused by thermal expansion cannot be released, it will also cause deformation or even connection failure of the exhaust pipe. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above purpose, according to one aspect of the utility model, there is provided a support device for an exhaust pipe between an engine and a muffler of construction machinery. The exhaust pipe includes an exhaust elbow. The exhaust elbow includes a first section extending in a first direction and connected to the muffler, and a second section extending in a second direction perpendicular to the first direction and connected to the engine. The support device includes a support member, the support member is configured as a plate-like structure and includes a main body portion extending in a third direction across the exhaust pipe and two legs extending from the main body portion. The third direction is perpendicular to the first direction and the second direction pairwise. The two legs are respectively fixed at positions on the radial two sides of the exhaust pipe in the third direction.

[0006] In this example, through the main body portion with a large width extending in the radial direction across the exhaust pipe in the third direction (for example, in the direction with the largest amplitude) of the support member, and the fixation of the two legs on the radial two sides of the exhaust pipe, the stiffness requirement of the support member in the third direction is met, so as to meet the fixation requirement of the exhaust pipe in this direction and suppress the key vibration. At the same time, the plate-like structure of the support member provides flexibility in the first direction and the second direction, enabling the thermal expansion stress and deformation on the first section and the second section of the exhaust pipe to be released to a certain extent, thereby improving the service life of the exhaust pipe and ensuring the connection performance.

[0007] According to an example of the present utility model, the main body portion includes at least two bending portions to form at least one first plate portion located between two adjacent bending portions, wherein the first plate portion is inclined with respect to a first direction and a second direction.

[0008] In this structure, through the arrangement of the inclined first plate portion, flexibility in the first direction and the second direction is further provided for the support member.

[0009] According to an example of the present utility model, the thickness of the plate-like structure is less than or equal to 8 mm. This preferred plate thickness is obtained by the inventor through a large number of tests, which can not only meet the stiffness requirements of the support member but also meet the flexibility requirements, can suppress the vibration of the exhaust pipe in the third direction, and can release the stress and deformation caused by the thermal expansion of the exhaust pipe in the second and second directions.

[0010] According to an example of the present utility model, the main body portion includes a second plate portion adapted to fix the support member through a plurality of first fasteners, and the two legs are adapted to be fixed to the exhaust pipe through a plurality of second fasteners, wherein the connection line of the plurality of first fasteners is in the third direction; and / or, the connection line of the plurality of second fasteners is in the third direction. This structure can provide greater flexibility for the exhaust pipe.

[0011] Since the connection lines of the plurality of first fasteners are all in the third direction X, this fixing method can improve the stiffness of the support member in the third direction X. At the same time, the connection line of the plurality of second fasteners (for example, two second fasteners located on the radial two sides of the exhaust pipe respectively) for fixing the two legs is in the third direction, which can more firmly fix the exhaust pipe in the third direction X and reduce its vibration.

[0012] According to an example of the present utility model, the support device further includes a fixing member fixed to the bracket of the muffler, wherein the second plate portion is fixed to the fixing member through the first fasteners. The arrangement of this fixing member can achieve better fixing of the support member.

[0013] According to an example of the present utility model, the support member includes one of the first plate portions, and the first plate portion extends obliquely from the second plate portion for fixing the support member to the two legs.

[0014] According to an example of the present utility model, the exhaust pipe further includes a bellows and a flange group connecting the second section of the exhaust elbow to the bellows, and the two legs are respectively fixed to the flange group through second fasteners. The arrangement of the bellows can release the thermal expansion of the exhaust pipe during operation, and the legs are fixed to the flange group, and the exhaust elbow, the bellows and the support device can be fixed by using the second fasteners.

[0015] According to another aspect of the present utility model, an exhaust system is provided. The exhaust system includes a muffler, an exhaust pipe connected to the muffler, and the support device as described above. Due to the adoption of the support device in the above examples, the exhaust system has less vibration, better thermal expansion resistance performance, and a longer service life.

[0016] According to still another aspect of the present utility model, an engine assembly is provided, which includes an engine, a muffler, an exhaust pipe connected to the engine and the muffler, and the support device according to any one of the foregoing examples.

[0017] According to yet another aspect of the present utility model, a construction machinery is provided. The construction machinery includes an engine and the exhaust system as described above, wherein one end of the exhaust pipe is connected to the air inlet of the muffler, and the other end is connected to the exhaust port of the engine.

[0018] According to an example of the present utility model, the construction machinery is a fracturing truck.

[0019] The support device of the present utility model is particularly suitable for supporting the exhaust pipe between the engine and the muffler of a fracturing truck. In the vibration test of the engine of such a fracturing truck, it is found that the exhaust pipe has very intense vibration in the horizontal left - right direction, while in the up - down direction and the front - back direction, the vibration is within an acceptable range. By adopting the support device of the present utility model, it can not only suppress the vibration of the exhaust pipe in the third direction (horizontal left - right direction), but also release the stress caused by the thermal expansion of the exhaust pipe in the first direction (i.e., the front - back direction) and the second direction (i.e., the up - down direction) and avoid deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The features and advantages of the present utility model will be clearly understood through the following detailed description with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as a limitation to the present utility model, where:

[0021] Figure 1 A three - dimensional schematic diagram showing the support device according to an exemplary embodiment of the present utility model being used for the exhaust pipe of a construction machinery.

[0022] Figure 2 Show Figure 1 The three - dimensional schematic diagram of the shown support device.

[0023] Description of the reference numerals:

[0024] 1. Exhaust pipe line; 11. Exhaust elbow; 12. Bellows; 13. Flange group; 2. Support member; 21. Main body part; 211. Bent part; 212. First plate part; 2121. Groove; 2122. First connection end; 2123. Second connection end; 213. Second plate part; 22. Leg; 3. Fixing member; 4. Muffler; X. Third direction; Y. First direction; Z. Second direction. Detailed implementation mode

[0025] Embodiments of the present utility model will be described below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to enable those skilled in the art to more fully understand and implement the present utility model. However, it is obvious to those skilled in the art that some of these specific details may not be required for the implementation of the present utility model. In addition, it should be understood that the present utility model is not limited to the specific embodiments described. On the contrary, the present utility model can be implemented by any combination of the features and elements described below, regardless of whether they relate to different embodiments.

[0026] In the following text, terms such as "first" and "second" are used to describe the elements of the present application. These terms are only used to distinguish the elements and not to limit the nature, order or number of these elements. The terms "comprising" and "having" are used to indicate an open inclusion meaning, and mean that there may be additional elements / components in addition to the listed elements / components.

[0027] Figure 1 A support device according to an embodiment of the present utility model is shown. The support device is used to support the exhaust pipe line between the engine and the muffler of a construction machine. The support device of the present utility model is particularly suitable for supporting the exhaust pipe line between the engine and the muffler of a fracturing truck. In such a construction machine, it can be known from the vibration test of the engine that the exhaust pipe line has very intense vibrations in the horizontal left and right directions, while the vibrations in the up and down directions and the front and back directions are within an acceptable range. It should be noted that the application scenario of the support device of the present utility model is not limited to this, and it can also be applied to the exhaust pipe line of any suitable vehicle, such as the engine of a construction machine.

[0028] In this embodiment, the muffler 4 is arranged on a bracket (not shown) of the muffler 4. The exhaust pipe line 1 according to this embodiment is as Figure 1As shown, it includes an exhaust elbow 11, which includes a first section 111 extending along a first direction Y and connected to the muffler 4, and a second section 112 extending along a second direction Z perpendicular to the first direction and connected to the engine. In order to release the thermal expansion of the exhaust pipe during engine operation, in this embodiment, the exhaust pipe 1 may further include a bellows 12 and a flange group 13 connecting the second section 112 of the exhaust elbow 11 to the bellows 12. The rear end of the exhaust elbow 11 along the gas flow direction can be connected to the intake port of the muffler 4 through the flange group. The front end of the bellows 12 along the gas flow direction can also be connected to the exhaust port of the engine through the flange group. In some specific embodiments, the flange group 13 may include two flanges of the same specification, one of which is disposed at the front end of the exhaust elbow 11 ( Figure 1 the lower end shown), and the other flange is disposed at the rear end of the bellows 12 ( Figure 2 the upper end shown). After aligning the two flanges and fixing them via a plurality of second fasteners (bolts in the figure), the exhaust elbow 11 and the bellows 12 can be connected.

[0029] In this embodiment, in the first direction Y, the second direction Z, and the third direction X that are perpendicular to each other, the amplitudes of the exhaust pipe 1 may vary. Figure 1 And Figure 2 the third direction X shown (i.e., the left - right direction) is the direction in which the amplitude of the exhaust pipe is the largest (which can be known, for example, through an engine vibration test). The support device of this embodiment may include a support member 2 as shown in Figure 1 and a fixing member 3 connected to the support member 2. One end of the support member 2 facing away from the fixing member 3 is connected to the exhaust pipe 1 (specifically, it can be connected to the flange group 13 by means of the above - mentioned second fasteners), and the fixing member 3 is fixed to the bracket of the muffler 4. Figure 2 shows a schematic diagram of the overall structure of the support device of this embodiment. The support member 2 is configured as a plate - like structure and may include a main body portion 21 and two legs 22. Combining Figure 1 as shown, the width of the main body portion 21 is designed to extend along the third direction X to straddle both radial sides of the exhaust pipe 1. The two legs 22 respectively extend from the first connection end 2122 and the second connection end 2123 of the main body portion 21 in the third direction X and extend to both radial sides of the exhaust pipe 1 in the third direction. Thus, the two legs 22 of the support member 2 can be fixed to the flange group 13 while fixing the exhaust elbow 11 and the bellows 12 by passing the corresponding second fasteners (bolts) through the legs 22 and the two flanges of the flange group 13.

[0030] In this embodiment, the large width of the main body portion 21 of the support member 2 extending in the third direction X meets the stiffness requirement for reducing the amplitude of the exhaust pipe 1 in this direction, suppressing the main vibration of the exhaust pipe 1. And the small thickness of the plate-like structure provides flexibility in the first direction and the second direction, so that the thermal expansion stress and deformation of the exhaust pipe 1 are released to a certain extent.

[0031] Preferably, the thickness of the plate-like structure of the support member 2 in this embodiment is less than or equal to 8 mm, thereby providing sufficient flexibility for the support member 2 to be easily deformed in other directions, especially in the first direction Y (front-rear direction), and thereby releasing the thermal expansion stress and deformation of the exhaust pipe 1.

[0032] Preferably, the main body portion 21 of the support member 2 may include at least two bending portions 211 to form at least one first plate portion 212 located between two adjacent bending portions 211. Each first plate portion 212 is inclined with respect to the first direction Y and the second direction Z, so as to ensure the flexibility of the support member 2 in the first direction Y and the second direction Z to release the thermal expansion stress of the first section 111 and the second section 112 of the exhaust pipe 1. In the illustrated embodiment, the support member includes two bending portions 211 and a first plate portion 212. The first plate portion 212 extends obliquely from the second plate portion 213 for fixing the support member 2 to two legs 22. One of the bending portions 211 is formed between the first plate portion 212 and the leg 22, and this bending portion significantly absorbs the thermal expansion stress of the second section 112 in the second direction Z. Another bending portion 211 is formed between the second plate portion 213 and the first plate portion 212, and this bending portion significantly absorbs the thermal expansion stress of the first section 111 in the first direction Y. This example of the support member 2 having an inclined first plate portion is more convenient for manufacturing.

[0033] To further improve the flexibility of the support member 2, a groove 2121 is provided in the middle of the end of the first plate portion 212 facing the leg 22, thereby forming a first connection end 2122 and a second connection end 2123 on both sides of the groove 2121. One leg 22 is connected to the first connection end 2122, and the other leg 22 is connected to the second connection end 2123. Thereby providing greater flexibility for the exhaust pipe 1 in the first direction Y and the second direction Z.

[0034] It can be understood that although Figure 1 and Figure 2 only two bending portions 211 are shown, in actual application, the number of the bending portions 211 can also be set to more according to actual needs, and multiple first plate portions 212 can also be correspondingly provided. The multiple first plate portions 212 are arranged in sequence between the leg 22 and the second plate portion 213.

[0035] Figure 2 The specific structure of the fixing member 3 and its specific connection structure with the supporting member 2 are also shown. Figure 1 , the fixing member 3 is arranged on one side of the exhaust pipe 1, and the fixing member 3 is a square tubular structure extending in the third direction X, which provides stable support for the support member 2 and provides a side wall that can be fitted and connected to the second plate portion 213 of the support member 2. The second plate portion 213 can be fixed to the fixing member 3 via a plurality of first fasteners (in this embodiment, two bolts). Preferably, the connection line of these first fasteners is in the third direction X. This fixing method can improve the rigidity of the support device in the third direction X.

[0036] Preferably, the two legs 22 of the supporting member 2 are symmetrically arranged on both sides of the main body 21 in the third direction X, and each leg 22 is Figure 2 It extends in the second direction Z shown in the figure, and is provided with a through hole for the second fastener to pass through at its end, and the connecting line of the through holes of the two legs 22 is in the third direction X. Therefore, the exhaust pipe 1 is more firmly fixed in the third direction X to reduce its vibration.

[0037] The utility model also provides an exhaust system, which may include a muffler 4, an exhaust pipeline 1 connected to the muffler 4, and the above-mentioned supporting device for the exhaust pipeline 1.

[0038] The utility model also provides an engine assembly, which includes an engine, a muffler 4, an exhaust pipe 1 connected to the engine and the muffler respectively, and the above-mentioned supporting device for the exhaust pipe 1. The end of the exhaust elbow 11 of the exhaust pipe 1 that faces away from the bellows 12 is connected to the air inlet of the muffler 4, and the end of the bellows 12 of the exhaust pipe 1 that faces away from the exhaust elbow 11 is connected to the exhaust port of the engine.

[0039] The utility model also provides an engineering machine, in particular a fracturing vehicle, which may include the above-mentioned engine assembly.

[0040] Industrial applicability

[0041] The support device according to the utility model is suitable for the exhaust system of engineering machinery such as a fracturing vehicle. However, it should be understood that the support device according to the utility model can also be used for other motor vehicles that need to support the exhaust pipe between the engine and the muffler.

[0042] The following is Figure 1 and Figure 2 Taking the embodiment shown as an example, the assembly process and working process of the support device according to the utility model are briefly described.

[0043] ​The two legs 22 of the support member 2 are respectively fixed to the flange group 13 of the exhaust pipe 1 on the two radial sides of the exhaust pipe 1 through two second fasteners. The fixing member 3 is fastened to the bracket of the muffler 4 through a plurality of third fasteners.

[0044] When the exhaust system of the construction machinery is working, the maximum amplitude of the exhaust pipe 1 is in the third direction X ( Figure 1 the left-right direction shown in the figure). The length directions of the first plate portion 212 and the second plate portion 213 of the support member 2 are arranged along the third direction X. The structure of the support member 2 with a large width (the width extends to be able to span the exhaust pipe 1. For example, in an exemplary structure, the width can reach 433 mm) can improve its stiffness in the third direction X, thereby suppressing the critical vibration of the exhaust pipe 1 in the third direction X. The plate-like structure of the support member 2, that is, the smaller thickness, can retain a certain degree of flexibility in the two directions of the first direction Y and the second direction Z. When the exhaust elbow 11 including the first section 111 and the second section 112 generates thermal expansion during operation, the support member 2 fixed to the exhaust pipe undergoes a certain deformation due to its plate-like structure, especially due to the existence of the two bending portions 211, so as to release the thermal expansion stress of the exhaust pipe 1.

[0045] For those skilled in the art, various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Based on the practice of the present invention disclosed in this specification, other embodiments of the present invention will be obvious to those skilled in the art. This specification and the examples disclosed therein should be considered merely illustrative, and the true scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A supporting device for an exhaust pipe (1) between an engine and a muffler of an engineering machine, characterized in that: The exhaust pipe (1) comprises an exhaust elbow (11), the exhaust elbow comprising a first section (111) extending along a first direction (Y) and connected to the muffler, and a second section (112) extending along a second direction (Z) perpendicular to the first direction and connected to the engine; Furthermore, the supporting device comprises a supporting member (2), wherein the supporting member (2) is configured as a plate-like structure and comprises: A main body (21) extending along a third direction (X) across the exhaust pipe (1), wherein the third direction (X) is perpendicular to the first direction (Y) and the second direction (Z); as well as Two legs (22) extend from the main body (21), and the two legs (22) are respectively fixed at positions on both sides of the exhaust pipe (1) in the radial direction (X).

2. The support device according to claim 1, characterized in that: The main body (21) comprises at least two bent portions (211) to form at least one first plate portion (212) located between two adjacent bent portions (211), wherein the first plate portion (212) is inclined relative to a first direction (Y) and a second direction (Z).

3. The supporting device according to claim 1, characterized in that: The thickness of the plate-like structure is less than or equal to 8 mm.

4. The supporting device according to any one of claims 1 to 3, characterized in that: The main body (21) includes a second plate portion (213) suitable for fixing the support member (2) through a plurality of first fasteners, and the two legs (22) are suitable for being fixed to the exhaust pipe (1) through a plurality of second fasteners, wherein a connecting line of the plurality of first fasteners is in the third direction (X); and / or a connecting line of the plurality of second fasteners is in the third direction (X).

5. The supporting device according to claim 4, characterized in that: The supporting device further comprises a fixing member (3) adapted to be fixed to a bracket of the muffler, wherein the second plate portion (213) is connected to the fixing member (3) by means of the first fastener.

6. The supporting device according to claim 2, characterized in that: The support member (2) comprises a first plate portion (212), wherein the first plate portion (212) extends obliquely from a second plate portion (213) for fixing the support member (2) to the two legs (22).

7. The support device according to any one of claims 1 to 3, 5 and 6, characterized in that: The exhaust pipe (1) further comprises a bellows (12) and a flange group (13) connecting the second section (112) and the bellows (12), and the two legs (22) are respectively fixed to the flange group (13) by means of second fasteners.

8. An exhaust system, characterized in that: It comprises a muffler (4), an exhaust pipe (1) connected to the muffler, and a supporting device according to any one of claims 1 to 7.

9. An engine assembly, characterized in that: The invention comprises an engine, a muffler (4), an exhaust pipe (1) connected to the engine and the muffler, and a supporting device according to any one of claims 1 to 7.

10. A fracturing truck, characterized in that: Comprising an engine assembly according to claim 9.

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