Supporting base damping system for radial flow turbocharger

Abstract

The invention discloses a supporting base damping system for a radial flow turbocharger. The supporting base damping system comprises a base, a support, a first buffering device and a second buffering device. The supercharger is installed on the support which is horizontally arranged, the support is installed on the base through the connecting assembly, and the connecting assembly can limit the longitudinal position of the support on the base and does not limit the transverse position of the support on the base. The first buffer device and the second buffer device are communicated and arranged on one side of the support, the air inlet end of the supercharger turbine shell is connected with the first buffer device, and the second buffer device is connected with the diesel engine exhaust manifold. According to the supporting base damping system for the radial flow turbocharger, the second buffering device and the first buffering device bear thermal deformation, the situation that a turbine shell is pushed to move in the radial direction due to thermal expansion of a pipeline at the turbine end of the turbocharger is effectively avoided, and then the situation that a rotor of the turbocharger rubs the shell is avoided; and the arranged flexible connecting assembly can enable the supercharger turbine shell to be adjusted in a self-adaptive mode in the horizontal direction when the supercharger turbine shell moves along with the rotor, shell rubbing is further avoided, and the stability of the rotor is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of turbochargers, and in particular to a support base damping system for a radial flow turbocharger. Background Art

[0002] In recent years, due to breakthroughs in diesel engine-related technologies, the entire engine has become more integrated and miniaturized. Therefore, in order to make the diesel engine structure more compact, major domestic diesel engine manufacturers are more inclined to use radial flow superchargers when developing diesel engines.

[0003] The radial flow turbocharger has the characteristics of radial air intake at the turbine end, and occupies less axial space, which provides more margin for the spatial layout of various parts of the diesel engine. However, in actual use, it is precisely because of this characteristic of radial air intake that the high-temperature waste discharged by the diesel engine flows radially into the turbine through the volute, driving the turbine to rotate. At the same time, the thermal deformation of the vortex end pipeline caused by high temperature will radially push the volute to deviate, making the gap between the turbine and the volute smaller, or even rubbing the shell. The rubbing between the turbine and the shell will reduce the efficiency of the supercharger. Since the thermal deformation of the pipeline is an uncontrollable factor, the gap between the turbine and the turbine shell also becomes an uncontrollable factor. At the least, it will cause friction and wear between the turbine and the turbine shell, and at the worst, it will cause the supercharger rotor to lock during operation, and in severe cases, it will cause the entire diesel engine to be scrapped.

[0004] Therefore, in the current context, radial flow turbochargers are in urgent need of a displacement damping system for the turbocharger turbine end intake to achieve the spatial adaptive adjustment function of the radial flow turbocharger under operation, avoid rotor rubbing, and improve the operating stability of the turbocharger. Summary of the invention

[0005] The present invention provides a support base damping system for a radial flow turbocharger to solve the above problems.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] A support base damping system for a radial flow turbocharger comprises a base, a support, a first buffer device and a second buffer device;

[0008] The supercharger is mounted on the support, and the support is mounted on the base through a connecting assembly, and the connecting assembly can limit the longitudinal position of the support on the base, but does not limit the lateral position of the support on the base;

[0009] The first buffer device and the second buffer device are connected and are both arranged on one side of the support. The air inlet end of the turbine housing of the supercharger is connected to the first buffer device, and the second buffer device is connected to the exhaust manifold of the diesel engine.

[0010] Furthermore, a vertical plate is vertically arranged on the base, the first buffer device and the second buffer device are respectively installed on both sides of the vertical plate, the air inlet end of the supercharger turbine housing is connected to the first buffer device, and the diesel engine exhaust manifold is connected to the second buffer device;

[0011] The first buffer device and the second buffer device are both bellows.

[0012] Furthermore, the connecting assembly includes a bolt and two nuts, the support and the base are both provided with bolt holes, the bolt passes through the bottom of the bolt hole and extends out of the base, and the two nuts are arranged on the lower side of the base and are installed on the bolt in sequence from top to bottom.

[0013] Furthermore, the support is provided with a support portion, and the shape of the support portion is adapted to the shape of the support body of the supercharger;

[0014] An oil return channel is provided at the bottom of the support portion, and the oil return channel is communicated with the oil return hole at the bottom of the supercharger.

[0015] Furthermore, a sealing structure is provided at the oil return channel.

[0016] Furthermore, ribs are provided on both sides of the vertical plate.

[0017] Furthermore, a gas hole is provided on the vertical plate, and the first buffer device and the second buffer device are installed on the vertical plate through flanges and are respectively connected to the gas hole.

[0018] Furthermore, the base is provided with bolt mounting holes for mounting anchor bolts.

[0019] The beneficial effects of the present invention are:

[0020] A support base damping system for a radial flow turbocharger disclosed in the present invention has a first buffer device and a second buffer device that can withstand thermal deformation, effectively preventing the turbine shell from moving in the radial direction due to thermal expansion of the pipeline at the turbine end of the supercharger, thereby preventing the supercharger rotor from rubbing against the shell. The flexible connection component that is provided can enable the supercharger turbine shell to be adaptively adjusted in the horizontal direction as the rotor moves, further preventing rubbing against the shell and ensuring the stability of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a support base damping system for a radial flow turbocharger disclosed in an embodiment of the present invention Figure 1 ;

[0023] Figure 2 A schematic diagram of a support base damping system for a radial flow turbocharger disclosed in an embodiment of the present invention Figure 2 (excluding the first buffer device and the second buffer device);

[0024] Figure 3 A schematic diagram of a support base damping system for a radial flow turbocharger disclosed in an embodiment of the present invention Figure 3 (with supercharger installed);

[0025] Figure 4 It is a schematic diagram of fixing a support base and a base by a connecting assembly of a radial flow turbocharger support base damping system disclosed in an embodiment of the present invention;

[0026] Figure 5 The test results of a test group of a support base damping system for a radial flow turbocharger disclosed in an embodiment of the present invention;

[0027] Figure 6 These are test results of a comparison group of a support base damping system for a radial flow turbocharger disclosed in an embodiment of the present invention.

[0028] In the figure:

[0029] 1. Base; 11. Bolt mounting holes;

[0030] 2. Support; 21. Support portion; 22. Oil return channel;

[0031] 3. The first buffer device;

[0032] 4. The second buffer device;

[0033] 5. Supercharger;

[0034] 6. Connecting assembly; 61. Bolt; 62. Nut;

[0035] 7. Inlet end of supercharger turbine housing;

[0036] 8. Vertical plate; 81. Gas hole; 82. Rib plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-2 The present embodiment shows a support base damping system for a radial turbocharger, comprising a base 1, a support 2, a first buffer device 3 and a second buffer device 4;

[0039] The supercharger 5 is mounted on the horizontally arranged support 2, and the support 2 is mounted on the base through a connecting assembly 6, and the connecting assembly can limit the longitudinal position of the support on the base, but does not limit the lateral position of the support on the base;

[0040] The first buffer device 3 and the second buffer device 4 are connected and are both arranged on one side of the support. The air inlet end 7 of the supercharger turbine housing is connected to the first buffer device 3, and the second buffer device 4 is connected to the exhaust manifold of the diesel engine.

[0041] The exhaust gas generated by the diesel engine enters the supercharger through the exhaust manifold, the second buffer device 4 and the first buffer device 3. The thermal deformation that the supercharger would otherwise be subjected to is absorbed and borne by the second buffer device 4 and the first buffer device 3, that is, the second buffer device 4 and the first buffer device 3 play a role of spatial buffering, thereby preventing the thermal expansion of the pipeline at the turbine end of the supercharger from pushing the turbine shell to move in the radial direction, thereby preventing the supercharger rotor from rubbing against the shell, thereby solving the problem of the reduction in the gap between the turbine and the turbine cover caused by the thermal expansion of the diesel engine pipeline, and improving the stability of the supercharger application; when the supercharger is working, the airflow has no The same frequency, so when the frequencies of the three are matched or close to each other under certain conditions during the operation of the supercharger, resonance will occur, and as the rotor speed increases, the degree of resonance will increase. The resonance will affect the position of the rotor and cause shell friction. Since the system is provided with a connecting component, the support and the base are flexibly connected. Therefore, when resonance occurs, the supercharger turbine shell can be adaptively adjusted in four horizontal directions as the rotor moves, thereby greatly reducing the impact of the resonance on the rotor in the horizontal direction, thereby reducing the amplitude of the resonance, effectively avoiding the friction between the rotor and the turbine shell, and further avoiding the occurrence of shell friction.

[0042] The present invention discloses a support base damping system for a radial flow turbocharger. The system can bear thermal deformation by means of a first buffer device and a second buffer device, thereby effectively preventing the turbine shell from moving in a radial direction due to thermal expansion of the pipeline at the turbine end of the supercharger, thereby preventing the supercharger rotor from rubbing against the shell. The flexible connection component can enable the supercharger turbine shell to be adaptively adjusted in four horizontal directions as the rotor moves, thereby further preventing rubbing against the shell and ensuring the stability of the rotor.

[0043] In a specific embodiment, a vertical plate 8 is vertically arranged on the base, the first buffer device 3 and the second buffer device 4 are respectively installed on both sides of the vertical plate, the turbocharger turbine housing inlet end 7 is connected to the first buffer device 3, and the diesel engine exhaust manifold is connected to the second buffer device 4;

[0044] The first buffer device 3 and the second buffer device 4 are both bellows; since the bellows is a metal or non-metal hose, it has good flexibility and fatigue resistance and can absorb certain displacement and vibration. When the temperature changes, the bellows can absorb and compensate for the displacement caused by thermal expansion and contraction through the expansion and contraction of its corrugations, thereby protecting other parts of the equipment or system from thermal deformation;

[0045] The vertical plate and the bottom plate of the base are set at 90 degrees. The vertical plate isolates the supercharger from the diesel engine, constructing a relatively independent operating space for the supercharger, which can effectively reduce the interference of the vibration generated by the diesel engine during operation on the supercharger, and can also improve the reliability of the operation of the supercharger rotor; the vertical plate can also provide an effective spatial support point for the bellows, creating mechanical conditions for the controllable absorption of thermal deformation by the bellows.

[0046] In a specific embodiment, Figure 4 As shown, the connecting assembly 6 includes a bolt 61 and two nuts 62. Bolt holes are provided on the support 2 and the base. The bolt passes through the bottom of the bolt hole and extends out of the base. Two nuts are provided on the lower side of the base 1 and are installed on the bolt in sequence from top to bottom. Self-locking is formed between the two nuts, and the nut on the upper side does not generate longitudinal pressure on the base, thereby limiting the longitudinal movement of the support and not limiting the displacement of the support in the lateral direction, ensuring that the support and the base are flexibly connected, so that the turbine shell of the supercharger can be adaptively adjusted in four horizontal directions when the rotor moves to avoid shell scratching.

[0047] In a specific embodiment, the support 2 is provided with a support portion 21, and the shape of the support portion is adapted to the shape of the support body of the supercharger;

[0048] The bottom of the support portion 21 is provided with an oil return channel 22, and the oil return channel 22 is connected to the oil return hole at the bottom of the supercharger; the support portion is used to support supercharger support bodies of different forms, such as a circular support body, a square support body and a simplified support body, which can ensure the adaptability of the damping system to different forms of radial superchargers. In this embodiment, the support portion is set to an arc shape to support the circular support body of the supercharger used; the supercharger support body is connected to the support 2 by bolts, and the structural schematic diagram of the turbocharger installed on the damper is shown in Figure 3 shown.

[0049] In a specific embodiment, a sealing structure is provided at the oil return passage 22 to ensure the sealing of the supercharger oil return circuit as well as the safety and reliability of the oil return.

[0050] In a specific embodiment, ribs 82 are provided on both sides of the vertical plate 8 , and the ribs can enhance the connection stability between the vertical plate and the base, and ensure the support stability of the first buffer device 3 and the second buffer device 4 .

[0051] In a specific embodiment, a gas hole 81 is provided on the vertical plate 8, and the first buffer device 3 and the second buffer device 4 are installed on the vertical plate 8 through flanges and are respectively connected to the gas holes; in this embodiment, a mounting hole is provided on the vertical plate, and the mounting hole is arranged on the outside of the gas hole 81. Bolts pass through the mounting hole to mount the flange on the vertical plate, and the cooperation of the mounting hole, bolts and flanges facilitates the connection and fixation of the bellows to the vertical plate; the flange and the vertical plate are sealed by a copper gasket.

[0052] In a specific embodiment, a bolt mounting hole 11 for installing anchor bolts is provided on the bottom of the base; this facilitates the installation and fixation of the base, and also facilitates its disassembly and assembly at the installation position, thereby improving the flexibility of the system; in this embodiment, a weight reduction groove is provided on the base to achieve weight reduction of the base and the system.

[0053] Experimental Test:

[0054] The radial turbocharger installed on the damping system is used as the test group, and the radial turbocharger without the damping system is used as the control group. The radial turbochargers of the test group and the control group are connected to the exhaust manifold of the diesel engine for testing until the calibration point of the turbocharger. After the test, the turbocharger is removed for inspection. Figure 5 The test results of the test group are shown below. The turbocharger turbine housing of the test group has no deformation and no abrasion. Figure 6 The figure shows the test results of the control group, in which the supercharger rotor of the control group scrapes the shell and the turbine shell is obviously damaged.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support base damping system for a radial flow turbocharger, characterized in that: It comprises a base (1), a support (2), a first buffer device (3) and a second buffer device (4); The supercharger (5) is mounted on the support (2), and the support (2) is mounted on the base (1) via a connecting assembly (6), wherein the connecting assembly can limit the longitudinal position of the support on the base but does not limit the lateral position of the support on the base; The first buffer device (3) and the second buffer device (4) are connected and are both arranged on one side of the support (2); the air inlet end (7) of the turbine housing of the supercharger is connected to the first buffer device (3), and the second buffer device (4) is connected to the exhaust manifold of the diesel engine.

2. A radial flow turbocharger support base damping system according to claim 1, characterized in that: A vertical plate (8) is vertically arranged on the base (1); the first buffer device (3) and the second buffer device (4) are respectively installed on two sides of the vertical plate (8); the air intake end (7) of the turbine housing of the supercharger is connected to the first buffer device (3); and the exhaust manifold of the diesel engine is connected to the second buffer device (4); The first buffer device (3) and the second buffer device (4) are both bellows.

3. A radial flow turbocharger support base damping system according to claim 1, characterized in that: The connecting assembly (6) comprises a bolt (61) and two nuts (62); the support (2) and the base are both provided with bolt holes; the bolt passes through the bottom of the bolt hole and extends out of the base (1); the two nuts are provided on the lower side of the base (1) and are sequentially mounted on the bolt from top to bottom.

4. The method of claim 1, wherein: The support (2) is provided with a support portion (21), the shape of the support portion being adapted to the shape of the support body of the supercharger; An oil return channel (22) is provided at the bottom of the support portion (21), and the oil return channel (22) is communicated with the oil return hole at the bottom of the supercharger.

5. A radial flow turbocharger support base damping system according to claim 4, characterized in that: A sealing structure is provided at the oil return channel (22).

6. A radial flow turbocharger support base damping system according to claim 2, characterized in that: Ribs (82) are provided on both sides of the vertical plate (8).

7. A radial flow turbocharger support base damping system according to claim 2, characterized in that: The vertical plate (8) is provided with a gas hole (81), and the first buffer device (3) and the second buffer device (4) are mounted on the vertical plate (8) via flanges and are respectively connected to the gas hole (81).

8. A radial flow turbocharger support base damping system according to claim 1, characterized in that: The base (1) is provided with bolt mounting holes (11) for mounting anchor bolts.

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