Anti-resonance structure of turbocharger

Abstract

The invention relates to the technical field of turbochargers, in particular to an anti-resonance structure of a turbocharger, a turbulent flow mechanism is arranged at the inlet end of a compressor shell, an outer barrel is connected to a mounting frame, an inner barrel is slidably arranged in the outer barrel, an electric cylinder is arranged between the inner barrel and the mounting frame, and a plurality of round rods are rotatably connected to the side wall of a rotating block in the circumferential direction; guide pieces are fixed to the ends of the round rods, and blades are fixed to the outer ends of the guide pieces. When the turbocharger resonates, the electric cylinder is controlled to stretch out and draw back, and the inclination angle of the blade is adjusted, so that the acting force and direction of the blade on airflow are changed, and the hydrodynamic force direction of the airflow entering the compressor shell is changed. By disturbing airflow, changing the flow state of the airflow, changing the vibration frequency of high-speed airflow, influencing parameters such as rotation resistance of the impeller and changing the rotation speed of the turbine and the rotation speed of the rotating shaft, resonance conditions cannot be established, and resonance is rapidly restrained. By arranging a plurality of connecting rods, a plurality of resonance detection positions are provided, and the anti-resonance effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of turbochargers, and in particular to an anti-resonance structure of a turbocharger. Background Art

[0002] Turbochargers are used in fuel vehicles to increase the intake volume by compressing air. Turbochargers use the inertial force of the exhaust gas discharged by the engine to drive the turbine in the turbine chamber. The turbine drives the coaxial impeller, which presses the air sent from the air filter pipe to enter the cylinder with pressure. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase synchronously, and the impeller compresses more air into the cylinder. The increase in air pressure and density can burn more fuel, increase the fuel amount and adjust the engine speed accordingly, thereby increasing the engine's output power.

[0003] The invention patent application with publication number CN104747275A discloses a turbocharger for an automobile engine, comprising a turbine casing, an intermediate body and a compressor casing connected in sequence, a connecting shaft passing through the intermediate body, a turbine and an impeller being respectively sleeved at both ends of the connecting shaft, a floating bearing being arranged between the connecting shaft and the intermediate body, and the floating bearing comprising an outer ring cylinder, an inner ring cylinder, a first ball, a second ball, a first retaining frame and a second retaining frame.

[0004] Due to the high-speed flow of air in the turbocharger, as well as the high-speed rotation of the shaft, impeller, and turbine, resonance will occur when the resonance conditions are met. Resonance will expand the amplitude of the device, easily leading to loose fasteners and component damage, and will produce loud noise. Since the flow rate of the fluid in the device is fast and unstable, resonance is difficult to completely curb. In terms of structural design, although resonance can be curbed within a speed range, it will often still occur when the speed reaches another range, which needs to be improved. Summary of the invention

[0005] The present application provides an anti-resonance structure of a turbocharger, which prevents the formation of resonance conditions by interfering with the movement of a fluid, thereby effectively curbing resonance.

[0006] The present application provides a turbocharger anti-resonance structure, which adopts the following technical solution: A turbocharger anti-resonance structure comprises a turbine casing, an intermediate body and a compressor casing connected in sequence, wherein a spoiler mechanism is arranged at the inlet end of the compressor casing, and the spoiler mechanism comprises a mounting frame, wherein the mounting frame is fixed to the inner wall of the inlet end of the compressor casing, an outer cylinder is connected to the mounting frame, an inner cylinder is slidably arranged in the outer cylinder, an electric cylinder is arranged between the inner cylinder and the mounting frame, a rotating block is rotatably connected to the end of the inner cylinder, a plurality of round rods are rotatably connected to the side wall of the rotating block along the circumferential direction, a guide plate is fixed to the end of the round rod, an arc groove for the guide plate to slide through is opened on the side wall of the outer cylinder, and a blade is fixed to the outer end of the guide plate.

[0007] By adopting the above technical solution, when the turbocharger resonates, the electric cylinder is controlled to expand and contract. When the inner cylinder moves toward the inner bottom of the outer cylinder, the inner cylinder moves together through the rotating block, the round rod, and the guide piece. The arc groove allows the guide piece to move only along the arc. The rotating block adaptively rotates with the inner cylinder, thereby rotating the round rod and the blade, adjusting the inclination angle of the blade, thereby changing the force and direction of the blade on the airflow, and changing the fluid dynamic direction of the airflow entering the compressor casing. By interfering with the airflow and changing the flow state of the airflow, the vibration frequency of the high-speed airflow will be changed, and the parameters such as the rotation resistance of the impeller will also be affected, and the rotation speed of the turbine and the shaft will be changed, so that the resonance condition cannot be established, thereby quickly suppressing the resonance.

[0008] Optionally, the outer cylinder is rotatably connected to the mounting frame through one side of the end portion, a tension spring is fixed to the other side of the end portion of the outer cylinder, and the other end of the tension spring is fixed to the mounting frame.

[0009] By adopting the above technical solution, when the inner cylinder slides to the bottom of the outer cylinder and cannot slide further, as the electric cylinder continues to extend, the elastic force of the tension spring is overcome to extend the tension spring, and the outer cylinder begins to rotate around the hinge point with the mounting frame, so that the outer cylinder is tilted, so that all the blades swing to one side, and this action also interferes with the flow of air. When the electric cylinder is shortened, the tension spring provides a restoring force for the rotation and reset of the outer cylinder.

[0010] Optionally, one end of the electric cylinder is hinged to the mounting frame, and the other end of the electric cylinder is hinged to the inner cylinder.

[0011] By adopting the above technical solution, when the electric cylinder is extended or retracted, it will first push the inner cylinder to slide inside the outer cylinder. When the inner cylinder slides to the bottom of the outer cylinder and cannot slide further, as the electric cylinder continues to extend, the outer cylinder rotates around the hinge point with the mounting frame. During this process, the electric cylinder can adaptively rotate through the hinge structures at both ends.

[0012] Optionally, the outer ends of the blades are rotatably connected to an outer ring, and the outer ring surrounds all the blades.

[0013] By adopting the above technical solution, the outer ring is used to support the outer end of the blade to avoid deformation of the blade.

[0014] Optionally, a truncated cone block is fixed to the end of the inner cylinder, and the rotating block is provided with a shrinking groove for the truncated cone block to rotate.

[0015] By adopting the above technical solution, the structure can avoid separation between the inner cylinder and the rotating block.

[0016] Optionally, it also includes a fixing frame located outside the intermediate body, the fixing frame is provided with a plurality of fixing holes for bolts to pass through, the fixing frame is provided with a vibration sensor, and the vibration sensor is electrically connected to the electric cylinder.

[0017] By adopting the above technical solution, bolts are inserted through the fixing holes to fix the fixing bracket to the vehicle frame. The fixing bracket does not contact the turbocharger, and the vibration of the turbocharger is not directly transmitted to the fixing bracket. The vibration of the turbocharger is detected by the vibration sensor.

[0018] Optionally, the detection end of the vibration sensor is connected to a plurality of connecting rods, and the other ends of the connecting rods are respectively fixed to the turbine casing, the intermediate body and the compressor casing.

[0019] By adopting the above technical solution, multiple connecting rods are set up with multiple positions for detecting resonance. When a large vibration occurs at any position in the turbine casing, the intermediate body and the compressor casing, it can be transmitted to the vibration sensor through the connecting rod, thereby triggering the operation of the electric cylinder and improving the anti-resonance effect.

[0020] Optionally, a clamp 1 is fixed to the end of the connecting rod, and the clamp 1 is connected to a clamp 2 via bolts at both ends, and the clamp 1 and the clamp 2 are combined into a ring shape.

[0021] By adopting the above technical solution, the first clamp and the second clamp are convenient for disassembly and assembly of the connecting rod end.

[0022] Optionally, the outer walls of the turbine casing, the intermediate body and the compressor casing are all provided with grooves for the first clamp and the second clamp to be inserted.

[0023] By adopting the above technical solution, the stability of the installation of the clamp 1 and the clamp 2 is improved through the clamping groove.

[0024] Optionally, the slots are respectively arranged on the outer walls of the circular tubes of the turbine casing, the intermediate body and the compressor casing.

[0025] By adopting the above technical solution, the clamping groove is in a circular shape, which is convenient for cooperating and pressing with the semi-annular clamps 1 and 2.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the turbocharger resonates, the electric cylinder is controlled to expand and contract, and the inclination angle of the blade is adjusted, thereby changing the force and direction of the blade on the airflow, and changing the fluid dynamic direction of the airflow entering the compressor casing. By interfering with the airflow and changing the flow pattern of the airflow, the vibration frequency of the high-speed airflow will be changed, and the parameters such as the rotation resistance of the impeller will be affected, and the rotation speed of the turbine and the shaft will be changed, so that the resonance condition cannot be established, thereby quickly suppressing the resonance; 2. As the electric cylinder continues to extend, it drives the outer cylinder to swing, so that all the blades swing to one side. This action will also interfere with the flow of air, thereby improving the anti-resonance effect; 3. By setting up multiple connecting rods and having multiple positions for detecting resonance, when a large vibration occurs at any position in the turbine casing, the intermediate body and the compressor casing, it can be transmitted to the vibration sensor through the connecting rod, thereby triggering the operation of the electric cylinder and improving the anti-resonance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional diagram of an anti-resonance structure of a turbocharger of an embodiment; Figure 2 is a three-dimensional view of the mounting frame, outer cylinder and blades of the embodiment; Figure 3 yes Figure 2 A cross-sectional view of Figure 4 yes Figure 3 A magnified image of point A; Figure 5 is a partial exploded view of the outer cylinder and blades of the embodiment; Figure 6 is a top view of an embodiment; Figure 7 It is a perspective view of a fixing bracket and a vibration sensor according to an embodiment.

[0028] Explanation of the reference numerals: 1. turbine casing; 2. intermediate body; 3. compressor casing; 31. mounting frame; 4. outer cylinder; 5. inner cylinder; 32. tension spring; 41. electric cylinder; 51. rotating block; 52. truncated cone block; 53. shrinking groove; 61. round rod; 62. guide plate; 42. arc groove; 6. blade; 63. outer ring; 7. fixing frame; 71. fixing hole; 72. vibration sensor; 73. connecting rod; 74. clamp one; 75. clamp two; 76. clamping groove. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figure 1This embodiment discloses an anti-resonance structure of a turbocharger, comprising a turbine casing 1, an intermediate body 2 and a compressor casing 3 connected in sequence, and also comprising a fixing frame 7 located outside the intermediate body 2. The inlet end of the compressor casing 3 is located at the end surface, and is used to inhale the air entering the engine. A rotating shaft is rotatably arranged in the intermediate body 2, and a turbine and an impeller are respectively fixed at both ends of the rotating shaft. The turbine is located in the turbine casing 1, and the impeller is located in the compressor casing 3. The turbine is driven to rotate by the exhaust gas of the engine passing through.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The inlet end of the compressor casing 3 is provided with a spoiler mechanism, which includes a mounting frame 31, which is fixed to the inner wall of the inlet end of the compressor casing 3. The mounting frame 31 is a hollow structure to reduce the obstruction of the airflow. The mounting frame 31 is connected to the outer cylinder 4, which is located at the center of the mounting frame 31, and the inner cylinder 5 is slidably arranged inside the outer cylinder 4. Specifically, the outer cylinder 4 is rotatably connected to the mounting frame 31 through one side of the end, and a tension spring 32 is fixed to the other side of the end of the outer cylinder 4, and the other end of the tension spring 32 is fixed to the mounting frame 31. An electric cylinder 41 is provided between the inner cylinder 5 and the mounting frame 31, and the electric cylinder 41 is located inside the inner cylinder 5 as a whole. One end of the electric cylinder 41 is hinged to the mounting frame 31, and the other end of the electric cylinder 41 is hinged to the inner bottom wall of the inner cylinder 5. The tension spring 32 is preset with a large elastic force and is in a stretched state. When the electric cylinder 41 is extended or retracted, it drives the inner cylinder 5 to slide in the outer cylinder 4. When the inner cylinder 5 slides to the bottom of the outer cylinder 4 and cannot continue to slide, as the electric cylinder 41 continues to extend, the elastic force of the tension spring 32 is overcome to stretch the tension spring 32, and the outer cylinder 4 begins to rotate around the hinge point with the mounting frame 31, causing the outer cylinder 4 to be tilted. When the electric cylinder 41 is shortened, the tension spring 32 provides a restoring force for the rotation and reset of the outer cylinder 4.

[0032] Reference Figure 3 and Figure 4 The end of the inner cylinder 5 is rotatably connected to a rotating block 51. Specifically, a truncated cone block 52 is fixed to the end of the inner cylinder 5. The rotating block 51 is provided with a shrinking groove 53 for the truncated cone block 52 to rotate. This structure prevents the inner cylinder 5 and the rotating block 51 from being separated.

[0033] Reference Figures 3 to 5 The side wall of the rotating block 51 is connected to a plurality of round rods 61 for rotation in the circumferential direction, and a guide piece 62 is fixed to the end of the round rod 61. The side wall of the outer cylinder 4 is provided with an arc groove 42 for the guide piece 62 to slide through. All the arc grooves 42 are evenly distributed about the circumference of the outer cylinder 4 and are symmetrical. The outer end of the guide piece 62 is fixed to a blade 6. The outer ends of the blades 6 are connected to an outer ring 63 for rotation together, and the outer ring 63 surrounds all the blades 6.

[0034] When the inner cylinder 5 moves toward the inner bottom of the outer cylinder 4, the inner cylinder 5 moves together through the rotating block 51, the round rod 61, and the guide piece 62. The arc groove 42 allows the guide piece 62 to move only along the arc. The rotating block 51 adaptively rotates with the inner cylinder 5, thereby rotating the round rod 61 and the blade 6, adjusting the inclination angle of the blade 6, thereby changing the force and direction of the blade 6 on the airflow, and changing the fluid dynamic direction of the airflow entering the compressor casing 3. The outer ring 63 is used to support the outer end of the blade 6 to prevent the blade 6 from deformation.

[0035] Reference Figure 6 and Figure 7 The fixing frame 7 is provided with a plurality of fixing holes 71 for bolts to pass through, and the fixing frame 7 is provided with a vibration sensor 72. The vibration sensor 72 is a prior art, and has a detection end. The vibration sensor 72 is electrically connected to the electric cylinder 41 through the controller. The vibration sensor 72 is used to detect whether there is resonance in the turbocharger. When resonance occurs, the controller controls the electric cylinder 41 according to the signal, so that the blade 6 and the outer cylinder 4 are moved.

[0036] Bolts are inserted through the fixing holes 71 to fix the fixing bracket 7 on the vehicle frame. The fixing bracket 7 does not contact the turbocharger, and the vibration of the turbocharger is not directly transmitted to the fixing bracket 7, thereby providing a reference for vibration detection. The detection end of the vibration sensor 72 is connected to a plurality of connecting rods 73, and the other ends of the connecting rods 73 are respectively fixed to the turbine housing 1, the intermediate body 2 and the compressor housing 3.

[0037] The end of the connecting rod 73 is fixed with a clamp 1 74, and the clamp 1 74 is connected with a clamp 2 75 through bolts at both ends, and the clamp 1 74 and the clamp 2 75 are combined into a ring. The outer walls of the turbine housing 1, the intermediate body 2 and the compressor housing 3 are all provided with a clamping groove 76 for the clamp 1 74 and the clamp 2 75 to be embedded, and the clamping groove 76 is respectively provided on the outer wall of the circular tube of the turbine housing 1, the intermediate body 2 and the compressor housing 3. The clamp 1 74 and the clamp 2 75 facilitate the disassembly and assembly of the connecting rod 73. It should be noted that the inner walls of the clamp 1 74 and the clamp 2 75 should avoid using vibration damping pads to prevent vibration from being absorbed.

[0038] The implementation principle of the anti-resonance structure of a turbocharger in the embodiment of the present application is: the vibration of the turbocharger is detected in real time by the vibration sensor 72. When the turbocharger vibrates normally, the vibration amplitude is small and does not reach the threshold set by the controller, so the electric cylinder 41 does not move. When the turbocharger resonates, the amplitude is large, and the vibration sensor 72 outputs a signal to the controller, thereby driving the electric cylinder 41 to extend.

[0039] When the electric cylinder 41 is extended, it will first drive all the blades 6 to rotate the inclination angle, thereby interfering with the airflow. As the electric cylinder 41 continues to extend, the electric cylinder 41 drives the outer cylinder 4 to swing the angle, so that all the blades 6 swing to one side, and this action will also interfere with the flow of the airflow. After the airflow pattern changes, the vibration frequency of the high-speed airflow will change, and it will also affect the parameters such as the rotation resistance of the impeller, change the rotation speed of the turbine and the shaft, so that the resonance condition cannot be established, and thus quickly suppress the resonance. When the resonance is eliminated, the vibration sensor 72 detects that the amplitude is small, and then controls the electric cylinder 41 to stop moving through the controller, so that the outer cylinder 4 and the blades 6 remain in this state. When the next resonance occurs, the electric cylinder 41 will continue to be controlled to extend. When the electric cylinder 41 is extended to the maximum length, it will gradually shorten, thus reciprocating.

[0040] By setting a plurality of connecting rods 73, there are a plurality of positions for detecting resonance. When a large vibration occurs at any position of the turbine casing 1, the intermediate body 2 and the compressor casing 3, it can be transmitted to the vibration sensor 72 through the connecting rod 73, thereby triggering the operation of the electric cylinder 41, thereby improving the anti-resonance effect, and it can be completed with only a single vibration sensor 72.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-resonance structure of a turbocharger, comprising a turbine housing (1), an intermediate body (2) and a compressor housing (3) connected in sequence, characterized in that: The inlet end of the compressor casing (3) is provided with a spoiler mechanism, and the spoiler mechanism comprises a mounting frame (31), the mounting frame (31) is fixed to the inner wall of the inlet end of the compressor casing (3), an outer cylinder (4) is connected to the mounting frame (31), an inner cylinder (5) is slidably arranged in the outer cylinder (4), an electric cylinder (41) is arranged between the inner cylinder (5) and the mounting frame (31), a rotating block (51) is rotatably connected to the end of the inner cylinder (5), a plurality of round rods (61) are rotatably connected to the side wall of the rotating block (51) along the circumferential direction, a guide plate (62) is fixed to the end of the round rod (61), an arc groove (42) for the guide plate (62) to slide through is opened on the side wall of the outer cylinder (4), and a blade (6) is fixed to the outer end of the guide plate (62).

2. The anti-resonance structure of a turbocharger according to claim 1, characterized in that: The outer cylinder (4) is rotatably connected to the mounting frame (31) via one end portion, a tension spring (32) is fixed to the other end portion of the outer cylinder (4), and the other end of the tension spring (32) is fixed to the mounting frame (31).

3. The anti-resonance structure of a turbocharger according to claim 2, characterized in that: One end of the electric cylinder (41) is hinged to the mounting frame (31), and the other end of the electric cylinder (41) is hinged to the inner cylinder (5).

4. The anti-resonance structure of a turbocharger according to claim 1, characterized in that: The outer ends of the blades (6) are rotatably connected to an outer ring (63), and the outer ring (63) surrounds all the blades (6).

5. The anti-resonance structure of a turbocharger according to claim 1, characterized in that: A truncated cone block (52) is fixed to the end of the inner cylinder (5), and the rotating block (51) is provided with a shrinking groove (53) for the truncated cone block (52) to rotate.

6. The anti-resonance structure of a turbocharger according to claim 1, characterized in that: It also includes a fixing frame (7) located outside the intermediate body (2), the fixing frame (7) being provided with a plurality of fixing holes (71) for bolts to pass through, the fixing frame (7) being provided with a vibration sensor (72), and the vibration sensor (72) being electrically connected to the electric cylinder (41).

7. The anti-resonance structure of a turbocharger according to claim 6, characterized in that: The detection end of the vibration sensor (72) is connected to a plurality of connecting rods (73), and the other ends of the connecting rods (73) are respectively fixed to the turbine casing (1), the intermediate body (2) and the compressor casing (3).

8. The anti-resonance structure of a turbocharger according to claim 7, characterized in that: A clamp 1 (74) is fixed to the end of the connecting rod (73), and the clamp 1 (74) is connected to a clamp 2 (75) via bolts at both ends, and the clamp 1 (74) and the clamp 2 (75) are combined into a ring shape.

9. The anti-resonance structure of a turbocharger according to claim 8, characterized in that: The outer walls of the turbine casing (1), the intermediate body (2) and the compressor casing (3) are all provided with clamping grooves (76) for inserting clamp 1 (74) and clamp 2 (75).

10. The anti-resonance structure of a turbocharger according to claim 9, characterized in that: The clamping grooves (76) are respectively arranged on the outer walls of the circular tubes of the turbine casing (1), the intermediate body (2) and the compressor casing (3).

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