Test Device and Test Method for Suppressing Intake Noise of Turbocharger Compressor

Abstract

The present invention discloses a test device and a test method for suppressing the intake noise of a supercharger compressor. The test device is sleeved on the inner wall surface of the compressor housing. The test device includes an eccentric wheel shaft assembly, a driving tube, an adjusting tube and a spring. The driving tube is sleeved inside the adjusting tube. An annular protruding step is provided on the outer wall surface of the driving tube. One end of the spring abuts against one side portion of the protruding step, and the other end abuts against the end face of the adjusting tube. The eccentric wheel shaft assembly contacts the other side portion of the protruding step, and the spring makes the eccentric wheel shaft assembly always fit with the other side portion of the protruding step. A shaft sleeve is provided on the compressor housing. The eccentric wheel shaft assembly is rotatably sleeved with the shaft sleeve. A ring groove is formed around between the end face of one end of the driving tube, the abutting surface and the inner wall surface of the adjusting tube. The wall thickness of one end of the driving tube is equal to the depth of the ring groove. When the eccentric wheel shaft assembly rotates, the eccentric wheel shaft assembly drives the driving tube to move in the axial direction of the adjusting tube to adjust the width of the ring groove.

Description

Technical Field

[0001] The present invention relates to the field of superchargers, and particularly to a test device and a test method for suppressing the intake noise of a supercharger compressor. Background Art

[0002] A supercharger is an indispensable component in a supercharged engine. The supercharger increases the intake air volume of the engine by compressing air, thereby improving the combustion efficiency and power of the engine. The supercharger includes two parts, a compressor and a turbine. When the operating point of the supercharger during operation is close to the surge boundary of the supercharger compressor (surge refers to the vibration of the compressor under abnormal operating conditions, which is very harmful to the supercharger. When the operating point of the compressor is close to the surge boundary, the air flow inside the compressor will undergo a turbulence phenomenon), at this time, the separation of the air flow from the compressor housing wall surface generates disturbances, resulting in pressure fluctuations at the compressor intake port, thereby easily generating a so-called Whoosh noise. The noise is mainly radiated directly from the intake port and indirectly from the compressor housing, intake pipeline, intercooler, etc. Generally, when a vehicle accelerates or decelerates suddenly, this kind of air flow noise in the frequency range of 4000 - 6000 Hz is easily generated, affecting the comfort of passengers. To reduce the intake noise of the compressor, common solutions are as follows:

[0003] Such as Figure 1 As shown, a ring groove 222 is opened in front of the impeller 150 downstream of the intake passage of the compressor 100, which can stabilize the intake air flow and reduce pressure fluctuations to suppress the generation of noise. Figure 1 The compressor 100 in [[ ]] includes a compressor housing 110, an impeller 150, a compressor rear cover 120, and a lock nut 160. Among them, the ring groove 222 is opened to the starting position of the tip of the impeller 150. Currently, there is no unified method for determining the size of the ring groove for different superchargers or different applications. It is difficult to determine the size of the ring groove from the perspective of simulation calculation. Generally, test samples with different combinations of ring groove 222 dimensions (groove depth H and groove width B) are used to test the noise level, that is, the final solution needs to be obtained through repeated trial and error comparison. In this way, there are many test samples and a large amount of work, and it is actually difficult to ensure obtaining a scheme close to the optimal one.

[0004] Therefore, in the prior art, when a ring groove is opened in the air passage of the compressor 100 to stabilize the intake air flow, reduce pressure fluctuations, and suppress noise, it is impossible to accurately determine the width and depth of the ring groove 222, and it is difficult and inconvenient to measure when determining the optimal width and depth of the ring groove 222 through experiments. Summary of the Invention

[0005] The object of the present invention is to solve the problems in the prior art that when a ring groove is opened in the compressor air passage to stabilize the intake air flow, reduce pressure fluctuations, and suppress noise, it is impossible to accurately determine the optimal width and depth of the ring groove, and it is difficult and inconvenient to measure when determining the optimal width and depth of the ring groove through experiments.

[0006] To solve the above technical problem, an embodiment of the present invention discloses a test device for suppressing the intake noise of a supercharger compressor. The test device is arranged in the intake duct of the compressor. The compressor includes a compressor housing, a compressor rear cover, a compressor shaft, and an impeller. The compressor housing is connected to the compressor rear cover, and an intake duct is formed inside the compressor housing. The impeller is sleeved on the compressor shaft. It is characterized in that the inner wall surface of the compressor housing has a stepped structure, and an abutting surface is formed at one end of the inner wall surface of the compressor housing close to the compressor rear cover. The test device is sleeved on the inner wall surface of the compressor housing, and one end of the test device abuts against the abutting surface.

[0007] The test device includes an eccentric wheel shaft assembly, a drive tube, an adjustment tube, and a spring. A spring is sleeved on the outer wall surface of one end of the drive tube, and one end of the drive tube is sleeved inside the adjustment tube. An annular protruding step is provided on the outer wall surface of the drive tube. One end of the spring abuts against one side of the protruding step, and the other end abuts against the end surface of one end of the adjustment tube. The eccentric wheel shaft assembly contacts the other side of the protruding step. The spring makes the eccentric wheel shaft assembly always fit with the other side of the protruding step. A bushing is provided on the compressor housing, and the eccentric wheel shaft assembly is rotatably sleeved with the bushing. The other end of the adjustment tube abuts against the abutting surface. A ring groove is formed around between the end surface of one end of the drive tube, the abutting surface, and the inner wall surface of the adjustment tube. The wall thickness of one end of the drive tube is equal to the depth of the ring groove; and when the eccentric wheel shaft assembly rotates, the eccentric wheel shaft assembly drives the drive tube to move relative to the adjustment tube in the axial direction of the adjustment tube to adjust the width of the ring groove.

[0008] By adopting the above technical solution, a test device is provided on the compressor to conveniently adjust the width of the ring groove, and then through tests, the optimal width value and depth value of the ring groove can be obtained when a ring groove is opened in the compressor air duct to stabilize the air flow and reduce pressure fluctuations to suppress noise.

[0009] Furthermore, the drive tube in the test device is sleeved inside the adjustment tube and can move. When the test device is installed in the compressor housing, a ring groove is formed around between the end surface of one end of the drive tube, the abutting surface, and the inner wall surface of the adjustment tube. By adjusting the position of the drive tube inside the adjustment tube, the width of the ring groove can be adjusted, and the wall thickness of the drive tube is equal to the depth of the ring groove. To conveniently adjust the position of the drive tube and thus adjust the width of the ring groove, a protruding step is provided on the drive tube, and an eccentric wheel shaft assembly and a spring are respectively provided on both sides of the protruding step. Rotating the eccentric wheel shaft assembly can drive the drive tube to move in the axial direction of the adjustment tube, thereby achieving the effect of adjusting the width of the ring groove. Further, the provided spring provides an elastic pre-tightening force to the drive tube, making the drive tube and the eccentric wheel shaft assembly always fit, and thus ensuring that the position of the drive tube inside the adjustment tube can be adjusted by rotating the eccentric wheel shaft assembly.

[0010] Further, a ring groove is formed around between the end face of one end of the driving tube, the abutting surface, and the inner wall surface of the adjusting tube. The wall thickness of one end of the driving tube is equal to the depth of the ring groove. Therefore, when adjusting the depth of the ring groove, the requirement of adjusting the depth of the ring groove can be achieved by replacing the adjusting tube and the driving tube with different thicknesses.

[0011] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. The eccentric wheel shaft assembly includes a rotating shaft, an eccentric wheel, a driving rocker arm, and a rocker arm pin. One end of the rotating shaft is connected to the eccentric wheel, and the other end is connected to the driving rocker arm. The rocker arm pin is arranged at a position of the driving rocker arm far from the rotating shaft, and the rotating shaft is rotatably sleeved with a shaft sleeve. Wherein, the rotation center of the eccentric wheel and the axis line of the rotating shaft are located on the same straight line. When the eccentric wheel rotates, the eccentric wheel drives the driving tube to move in the axial direction of the adjusting tube to adjust the width of the ring groove.

[0012] Adopting the above technical solution, by arranging the eccentric wheel shaft assembly, the driving tube can be simply and conveniently driven to move in the axial direction of the adjusting tube to adjust the width of the ring groove. Specifically, one end of the eccentric wheel is connected to the rotating shaft, the other end of the rotating shaft is connected to the driving rocker arm, and the rotating shaft is sleeved in the shaft sleeve. When the rocker arm pin and the driving rocker arm rotate, the rotating shaft and the eccentric wheel will be driven to rotate. When the eccentric wheel rotates, the abutting distances from the protruding step are different, thereby driving and adjusting the driving tube to move in the axial direction of the adjusting tube, so that the distance between the end face of the driving tube and the abutting surface on the inner wall surface of the compressor housing changes, and thus the width between the end face of the driving tube and the abutting surface, that is, the width of the ring groove, is adjusted.

[0013] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. The eccentric wheel shaft assembly further includes an elastic pad, the elastic pad is arranged between the driving rocker arm and the shaft sleeve, and further includes a push rod and an actuator. One end of the push rod is rotatably connected to the actuator, and the other end of the push rod is rotatably connected to the rocker arm pin. The rocker arm pin and the driving rocker arm are driven to rotate by the actuator and the push rod.

[0014] Adopting the above technical solution, the elastic pad is arranged between the driving rocker arm and the shaft sleeve, and is used to limit the axial jitter of the eccentric wheel shaft assembly and prevent the gas inside the compressor housing from leaking.

[0015] Further, one end of the push rod is rotatably connected to the actuator, and the other end is rotatably connected to the rocker arm pin. The actuator drives the push rod to move, the push rod drives the rocker arm pin and the driving rocker arm to rotate, thereby causing the eccentric wheel and the rotating shaft to rotate, and driving the driving tube to move in the axial direction of the adjusting tube, and further achieving the effect of adjusting the width of the ring groove.

[0016] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. A relief groove is arranged at a position of the protruding step far from the eccentric wheel shaft assembly.

[0017] With the above technical solution, an avoidance groove is provided on the protruding step, which facilitates rotating the drive tube after the test device is used, enabling the eccentric wheel shaft assembly to pass through the avoidance groove on the protruding step, thereby facilitating the disassembly and replacement of the drive tube and the adjustment tube.

[0018] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. The test device further includes a threaded pin, which includes an upper section and a lower section. The diameter of the upper section is larger than that of the lower section, and an external thread is provided on the outer wall surface of the upper section.

[0019] Moreover, a threaded hole adapted to the upper section is provided on the compressor housing, a circumferential groove is provided on the adjustment tube, the circumferential groove extends along the circumferential direction of the adjustment tube, a rotation prevention groove is correspondingly provided on the drive tube, the rotation prevention groove extends along the axial direction of the drive tube, and the threaded pin passes through the threaded hole and the circumferential groove and has a clearance fit with the rotation prevention groove to limit the axial movement of the adjustment tube and the circumferential rotation of the drive tube, and the threaded pin can move in the axial direction of the drive tube relative to the rotation prevention groove.

[0020] With the above technical solution, an external thread is provided at the upper end of the threaded pin, and a threaded hole is provided on the compressor housing. The threaded pin and the compressor housing can be conveniently screwed or disassembled through the external thread and the threaded hole, and the adjustment tube and the drive tube are limited by the threaded pin.

[0021] Furthermore, a circumferential groove extending along the circumferential direction of the adjustment tube is provided on the adjustment tube, enabling the threaded pin to pass through the circumferential groove to limit the adjustment tube, and the lower section of the threaded pin cooperates with the rotation prevention groove on the drive tube to limit the radial rotation or displacement of the drive tube through the cooperation of the threaded pin and the rotation prevention groove.

[0022] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. The depth of the rotation prevention groove is less than the thickness of the drive tube; when the drive tube moves relative to the adjustment tube in the axial direction of the adjustment tube, the lower section of the threaded pin moves relatively within the rotation prevention groove.

[0023] With the above technical solution, the depth of the rotation prevention groove is less than the thickness of the drive tube, that is, the rotation prevention groove does not penetrate the drive tube, and the length of the rotation prevention groove extends along the axial direction of the drive tube. When the drive tube moves relative to the adjustment tube in the axial direction of the adjustment tube, the lower section of the threaded pin can move relatively within the rotation prevention groove.

[0024] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. The test device further includes a cover, the cover is clamped to the end face of the drive tube close to the air inlet and is arranged at the air inlet of the compressor housing. A buckle is provided on the cover, and a slot adapted to the buckle is provided on one end face of the drive tube.

[0025] With the above technical solution, air enters the intake passage of the compressor from the cover, and the cover is detachably connected to the drive pipe through a buckle, which is simpler and more convenient for disassembly and assembly.

[0026] An embodiment of the present invention also discloses a test device for suppressing the intake noise of a supercharger compressor. A plurality of buckles are provided, each buckle is provided with a spherical head, and an opening is provided on the head, and the opening is telescopically arranged.

[0027] With the above technical solution, a plurality of buckles are provided, so that the cover and the drive pipe are more firmly clamped. Each buckle is provided with a spherical head, which is more stable after clamping, and the spherical head can also be easily detached from the card slot during disassembly, facilitating assembly and disassembly.

[0028] An embodiment of the present invention also discloses a test method for a test device for suppressing the intake noise of a supercharger compressor. The test method includes:

[0029] S1. When the initial values of the width and depth of the ring groove are both set to zero, the supercharged engine performs a rapid acceleration and deceleration test to detect whether there is intake noise in the compressor;

[0030] If not, it is determined that there is no need to set a ring groove in the compressor;

[0031] If so, go to step S2;

[0032] S2. Drive the drive pipe to move in the axial direction of the adjustment pipe through the eccentric wheel shaft assembly to adjust the width of the ring groove. When the ring groove is at different widths, the supercharged engine is respectively subjected to a rapid acceleration and deceleration test to detect whether there is intake noise in the compressor;

[0033] If it is detected that the compressor has intake noise under all different widths of the ring groove, go to step S3;

[0034] If it is detected that the compressor has no intake noise, record the current width and current depth of the ring groove;

[0035] S3. Adjust the depth of the ring groove by replacing different combinations of drive pipes and adjustment pipes with different thicknesses. When the ring groove is at different depths, repeat the above step S2.

[0036] With the above technical solution, when testing the intake noise of the compressor through this test device, it is possible to detect the intake noise when there is no ring groove, and also to detect the intake noise when there is a ring groove and the width of the ring groove is different; it is also possible to replace different combinations of drive pipes and adjustment pipes with different thicknesses according to needs to adjust the depth of the ring groove, and continue to test by adjusting the ring groove with different widths at different depths of the ring groove, so as to obtain the optimal depth value and width value of the ring groove. The test process is simple and convenient, easy to operate, and the test data is also relatively accurate.

[0037] Embodiments of the present invention also disclose a test method for a test device applied to suppressing the intake noise of a supercharger compressor. The width of the annular groove is a single-valued corresponding function of the angular displacement of the driving rocker arm or the opening position of the actuator. The width of the annular groove can be obtained by detecting the angular displacement of the driving rocker arm or the opening position of the actuator.

[0038] Adopting the above technical solution, when the intake noise of the compressor is detected to be the minimum or there is no intake noise, by substituting the detected angular displacement of the driving rocker arm or the opening position of the actuator into the corresponding single-valued corresponding function, the width of the annular groove can be obtained quickly and accurately. Since this solution precisely drives the push rod to act through the actuator and further drives the driving rocker arm to rotate through the push rod, both the angular displacement of the driving rocker arm and the opening position of the actuator can be used to calculate the width of the annular groove.

[0039] The beneficial effects of the present invention are:

[0040] A test device and a test method for suppressing the intake noise of a supercharger compressor are provided. Through this test device, the optimal values of the width and depth of the annular groove to be set for different compressors can be determined, reducing the test workload and the number of test specimens. The test device works in cooperation by setting an eccentric wheel shaft assembly, a driving tube, an adjusting tube, and a spring. An adjustable annular groove is formed between the driving tube and the adjusting tube and the inner wall surface of the compressor. The driving tube can be adjusted to move within the adjusting tube through the eccentric wheel shaft assembly, thereby obtaining the optimal value of the annular groove, minimizing the hardware equipment and test steps as much as possible. The best solution can be obtained by experimentally optimizing the annular groove dimensions. The test device of the present invention is convenient to use and maintain, is suitable for the NVH test of vehicle supercharged engines, and is of great benefit to improving the working performance of the intake system of supercharged engines. Brief Description of the Drawings

[0041] Figure 1 It is a schematic structural diagram of a compressor with an annular groove in the prior art;

[0042] Figure 2 It is a cross-sectional view of the test device for suppressing the intake noise of a supercharger compressor and the supercharger provided in Embodiment 1 of the present invention;

[0043] Figure 3 It is an exploded view of the test device for suppressing the intake noise of a supercharger compressor provided in Embodiment 1 of the present invention;

[0044] Figure 4 It is a schematic structural diagram of the driving tube and the cover in the test device for suppressing the intake noise of a supercharger compressor provided in Embodiment 1 of the present invention;

[0045] Figure 5 It is a schematic structural diagram of the test device for suppressing the intake noise of a supercharger compressor provided in Embodiment 1 of the present invention applied to a supercharger;

[0046] Figure 6 It is a flowchart of the test method provided in Embodiment 2 of the present invention;

[0047] Figure 7 It is a schematic diagram of the test method provided in Embodiment 2 of the present invention on the compressor pulse spectrum.

[0048] Description of the reference numerals:

[0049] 10. Supercharger;

[0050] 100. Compressor;

[0051] 110. Compressor housing;

[0052] 111. Inner wall surface; 112. Contact surface; 113. Bush;

[0053] 120. Compressor rear cover; 140. Compressor shaft; 150. Impeller; 160. Locking nut;

[0054] 200. Test device;

[0055] 210. Eccentric wheel shaft assembly;

[0056] 211. Rotating shaft; 212. Eccentric wheel; 213. Driving rocker arm; 214. Rocker arm pin; 215. Elastic pad;

[0057] 220. Driving pipe;

[0058] 221. Protruding step; 222. Ring groove; 223. Anti-rotation groove; 224. Card slot;

[0059] 2211. Avoidance groove;

[0060] 230. Adjusting pipe;

[0061] 231. Circumferential groove;

[0062] 240. Spring;

[0063] 250. Threaded pin;

[0064] 251. Upper section; 252. Lower section;

[0065] 260. Actuator;

[0066] 270. Cover;

[0067] 271. Buckle;

[0068] 280. Push rod

[0069] H. Depth of the ring groove; B. Width of the ring groove. Detailed implementation manners

[0070] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0071] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0072] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0073] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0074] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0075] To make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below with reference to the drawings.

[0076] Embodiment 1

[0077] The implementation manner of this embodiment discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10, asFigure 2 and Figure 3 As shown in Figure 3 , the test device 200 is arranged in the intake passage of the compressor 100. The compressor 100 includes a compressor housing 110, a compressor rear cover 120, a compressor shaft 140, and an impeller 150. The compressor housing 110 is connected to the compressor rear cover 120. An intake passage is formed inside the compressor housing 110. The impeller 150 is sleeved on the stepped shaft section of the compressor shaft 140. One end of the impeller 150 is fixedly connected through a locking nut 160. The inner wall surface 111 of the compressor housing 110 has a stepped structure, and an abutting surface 112 is formed at one end of the inner wall surface 111 of the compressor housing 110 close to the compressor rear cover 120. The test device 200 is sleeved on the inner wall surface 111 of the compressor housing 110, and one end of the test device 200 abuts against the abutting surface 112.

[0078] The test device 200 includes an eccentric wheel shaft assembly 210, a drive tube 220, an adjustment tube 230, and a spring 240. A spring 240 is sleeved on the outer wall surface of one end of the drive tube 220, and the drive tube 220 is sleeved inside the adjustment tube 230. An annular protruding step 221 is provided on the outer wall surface of the drive tube 220. The inner wall surface 111 of the compressor housing 110 fits with the outer circular wall surface of the protruding step 221 to guide the protruding drive tube 220 to slide freely along the axial direction. One end of the spring 240 abuts against one side portion of the protruding step 221, and the other end abuts against the end surface of one end of the adjustment tube 230. The eccentric wheel shaft assembly 210 contacts the other side portion of the protruding step 221. The restoring force of the spring 240 makes the eccentric wheel shaft assembly 210 always fit with the other side portion of the protruding step 221. A bushing 113 is provided on the compressor housing 110, and the eccentric wheel shaft assembly 210 is rotatably sleeved with the bushing 113. The other end of the adjustment tube 230 abuts against the abutting surface 112. A ring groove 222 is formed around between the end surface of one end of the drive tube 220, the abutting surface 112, and the inner wall surface of the adjustment tube 230. The wall thickness of one end of the drive tube 220 is equal to the depth of the ring groove 222. And when the eccentric wheel shaft assembly 210 rotates, the eccentric wheel shaft assembly 210 drives the drive tube 220 to move in the axial direction of the adjustment tube 230 relative to the adjustment tube 230 to adjust the width of the ring groove 222.

[0079] Specifically, in this embodiment, the test device 200 can be applied to compressors 100 of different models for testing, so as to obtain the optimal design of the ring groove 222 for different compressors 100, thereby reducing the intake noise level generated during the operation of the compressor 100. The test results show that a good design of the ring groove 222 can not only reduce the airflow noise by about 5 dB, but also has no actual impact on the surge boundary and working efficiency of the compressor 100, etc.

[0080] More specifically, in this embodiment, the test device 200 can be used in a single supercharger bench, an engine bench, and a vehicle full-throttle acceleration noise test. In addition, asFigure 5 As shown, when the test device 200 is in use, an actuator 260 can be additionally provided to control the rotation of the eccentric wheel shaft assembly 210, so as to obtain a continuously adjustable width B of the annular groove 222. Both ends of the push rod 280 are rotatably connected to the actuator 260 and the rocker arm pin 214 respectively. The actuator 260 drives the rocker arm 213 to rotate through the push rod 280, and then controls the movement of the drive tube 220 in the adjustment tube 230 through the eccentric wheel shaft assembly 210.

[0081] More specifically, in this embodiment, the spring 240 can be a helical spring, a disc spring, a return spring or other elastic members. Those skilled in the art can select according to actual needs and specific situations, and this embodiment does not make a unique limitation in this regard.

[0082] More specifically, in this embodiment, the eccentric wheel shaft assembly 210 can also be set as a cam mechanism, and by setting the cam mechanism, it is also possible to realize pushing the drive tube 220 to move in the adjustment tube 230.

[0083] More specifically, in this embodiment, by providing a test device 200 on the compressor 100, the width of the annular groove 222 can be conveniently adjusted, and then through tests, the optimal width and depth values of the annular groove 222 can be obtained when the annular groove 222 is opened in the air passage of the compressor 100 to stabilize the air inflow, reduce pressure fluctuations and suppress noise.

[0084] More specifically, in this embodiment, as Figure 2 and Figure 3 shown, the drive tube 220 in the test device 200 is sleeved in the adjustment tube 230 and can move. When the test device 200 is installed in the compressor housing 110, an annular groove is formed around between the end face of one end of the drive tube 220, the abutting surface 112 and the inner wall surface of the adjustment tube 230. By adjusting the position of the drive tube 220 in the adjustment tube 230, the width of the annular groove 222 can be adjusted, and the wall thickness of one end of the drive tube 220 is equal to the depth of the annular groove 222. In order to conveniently adjust the position of the drive tube 220 and thus adjust the width of the annular groove 222, a protruding step 221 is provided on the drive tube 220, and the eccentric wheel shaft assembly 210 and the spring 240 are respectively provided on both sides of the protruding step 221. Rotating the eccentric wheel shaft assembly 210 can drive the drive tube 220 to move in the axial direction of the adjustment tube 230, and thus achieve the effect of adjusting the width of the annular groove 222. Further, the provided spring 240 provides an elastic pre-tightening force to the drive tube 220, so that the drive tube 220 and the eccentric wheel shaft assembly 210 are always in contact, and thus it is ensured that rotating the eccentric wheel shaft assembly 210 can adjust the position of the drive tube 220 in the adjustment tube 230. In addition, the spring 240 always presses the adjustment tube 230 against the abutting surface 112 of the compressor housing 110.

[0085] More specifically, in this embodiment, since an annular groove is formed around between the end face of one end of the driving tube 220, the abutting face 112, and the inner wall surface of the adjusting tube 230, and the wall thickness of one end of the driving tube 220 is equal to the depth of the annular groove 222, when adjusting the depth of the annular groove 222, the requirement of adjusting the depth of the annular groove 222 can be achieved by replacing the combination of the adjusting tube 230 and the driving tube 220 with different thicknesses.

[0086] The embodiment of the present disclosure also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10. The eccentric wheel shaft assembly 210 includes a rotating shaft 211, an eccentric wheel 212, a driving rocker arm 213, and a rocker pin 214. One end of the rotating shaft 211 is connected to the eccentric wheel 212, and the other end is connected to the driving rocker arm 213. The rocker pin 214 is disposed at a position of the driving rocker arm 213 away from the rotating shaft 211, and the rotating shaft 211 is rotatably sleeved with the bushing 113. Wherein, the rotation center line of the eccentric wheel 212 and the axis line of the rotating shaft 211 are located on the same straight line. When the eccentric wheel 212 rotates, the eccentric wheel 212 drives the driving tube 220 to move in the axial direction of the adjusting tube 230 to adjust the width of the annular groove 222.

[0087] Specifically, in this embodiment, as Figure 2 shown, the bushing 113 is press-fitted into the compressor housing 110, the rotating shaft 211 is rotatably sleeved in the bushing 113, and the rotating shaft 211 and the driving rocker arm 213 can be welded, riveted or connected by other means. By rotating the rocker pin 214 and the driving rocker arm 213, the rotating shaft 211 can be driven to rotate, and then the eccentric wheel 212 also rotates, and the driving tube 220 is controlled to move in the axial direction of the adjusting tube 230 through the eccentric wheel 212.

[0088] More specifically, in this embodiment, the rotation center of the eccentric wheel 212 and the axis line of the rotating shaft 211 are located on the same straight line. With this structure, when the eccentric wheel 212 rotates, the eccentric wheel 212 drives the driving tube 220 to move in the axial direction of the adjusting tube 230 to adjust the width of the annular groove 222.

[0089] More specifically, in this embodiment, by providing the eccentric wheel shaft assembly 210, the drive tube 220 can be simply and conveniently driven to move in the axial direction of the adjustment tube 230 to adjust the width of the annular groove 222. Specifically, the eccentric wheel 212 is connected to one end of the rotating shaft 211, the other end of the rotating shaft 211 is connected to the drive rocker 213, and the rotating shaft 211 is sleeved in the bushing 113. When the rocker pin 214 and the drive rocker 213 rotate, the rotating shaft 211 and the eccentric wheel 212 will be driven to rotate. When the eccentric wheel 212 rotates, the contact position with the protruding step 221 is different, thereby driving and adjusting the drive tube 220 to move in the axial direction of the adjustment tube 230, so that the distance between the end face of the drive tube 220 and the contact surface 112 on the inner wall surface 111 of the compressor housing 110 changes, thereby adjusting the distance between the end face of the drive tube 220 and the contact surface 112, that is, the width of the annular groove 222.

[0090] The embodiment of the present embodiment also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10. The eccentric wheel shaft assembly 210 further includes an elastic pad 215. The elastic pad 215 is disposed between the drive rocker 213 and the bushing 113, and further includes a push rod 280 and an actuator 260. One end of the push rod 280 is rotatably connected to the actuator 260, and the other end of the push rod 280 is rotatably connected to the rocker pin 214. The rocker pin 214 and the drive rocker 213 are driven to rotate by the actuator 260 and the push rod 280.

[0091] Specifically, in this embodiment, one end of the push rod 280 is rotatably connected to the actuator 260, and the other end is rotatably connected to the rocker pin 214. By the action of the actuator 260, the push rod 280 is driven to act. The push rod 280 drives the rocker pin 214 and the drive rocker 213 to rotate, thereby causing the eccentric wheel 212 and the rotating shaft 211 to rotate, and driving the drive tube 220 to move in the axial direction of the adjustment tube 230, thereby achieving the effect of adjusting the width of the annular groove 222.

[0092] Specifically, in this embodiment, the elastic pad 215 is disposed between the drive rocker 213 and the bushing 113, and is used to limit the axial jitter of the eccentric wheel shaft assembly 210 and prevent gas leakage inside the compressor housing 110. The elastic pad 215 can be a common elastic gasket or a disc spring adapted to the bushing 113, and its material can be spring steel or other rigid alloy materials. Those skilled in the art can design according to actual needs, and this embodiment does not make specific limitations.

[0093] The embodiment of the present embodiment also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10. A relief groove 2211 is provided at a position of the protruding step 221 away from the eccentric wheel shaft assembly 210.

[0094] Specifically, in this embodiment, the opening size of the avoidance groove 2211 is adapted to the eccentric wheel shaft assembly 210, and the avoidance groove 2211 is provided on the protruding step 221 at a position 180° spaced from the eccentric wheel shaft assembly 210. With the above technical solution, setting the avoidance groove 2211 on the protruding step 221 facilitates rotating the drive tube 220 after the test device 200 is used, enabling the eccentric wheel shaft assembly 210 to pass through the avoidance groove 2211 on the protruding step 221, thereby facilitating the disassembly and replacement of the drive tube 220 and the adjustment tube 230.

[0095] The embodiment of the present implementation manner also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10. The test device 200 further includes a threaded pin 250. The threaded pin 250 includes an upper section 251 and a lower section 252. The diameter of the upper section 251 is greater than that of the lower section 252, and an external thread is provided on the outer wall surface of the upper section 251.

[0096] Moreover, a threaded hole adapted to the upper section 251 is provided on the compressor housing 110. A circumferential groove 231 is provided on the adjustment tube 230. The circumferential groove 231 extends along the circumferential direction of the adjustment tube 230. A rotation prevention groove 223 is correspondingly provided on the drive tube 220. The rotation prevention groove 223 extends along the axial direction of the drive tube 220. The threaded pin 250 passes through the threaded hole and the circumferential groove 231 and is in clearance fit with the rotation prevention groove 223 to limit the axial movement of the adjustment tube 230 and the circumferential rotation of the drive tube 220, and the threaded pin 250 can move in the axial direction of the drive tube 220 relative to the rotation prevention groove 223.

[0097] Specifically, in this embodiment, an external thread is provided at the upper end of the threaded pin 250, and a threaded hole is provided on the compressor housing 110. The threaded pin 250 and the compressor housing 110 can be conveniently screwed or disassembled through the external thread and the threaded hole, and the adjustment tube 230 and the drive tube 220 are limited by the threaded pin 250.

[0098] More specifically, in this embodiment, the diameter of the upper section 251 of the threaded pin 250 can be 10 mm, 12 mm, 14 mm or other sizes, and the diameter of the lower section 252 of the threaded pin 250 can be 7 mm, 8 mm, 9 mm or other sizes. This embodiment does not make specific limitations on this.

[0099] More specifically, in this embodiment, a circumferential groove 231 extending along the circumferential direction of the adjustment tube 230 is provided on the adjustment tube 230, enabling the threaded pin 250 to pass through the circumferential groove 231 to axially limit the adjustment tube 230, and the lower section 252 of the threaded pin 250 cooperates with the rotation prevention groove 223 on the drive tube 220, and the circumferential rotation of the drive tube 220 is restricted by the cooperation of the threaded pin 250 and the rotation prevention groove 223.

[0100] More specifically, in this embodiment, as Figure 3 shown, the anti-rotation groove 223 extends along the axial direction of the drive tube 220. With this structural design, when the test device 200 is in use and the eccentric wheel shaft assembly 210 is rotated to adjust the movement of the drive tube 220 in the axial direction of the adjustment tube 230, the lower section 252 of the threaded pin 250 can move relative to each other within the anti-rotation groove 223 without interfering with the movement of the drive tube 220, and at the same time, it can prevent the drive tube 220 from rotating in the circumferential direction.

[0101] The implementation mode of this embodiment also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10. The depth of the anti-rotation groove 223 is less than the wall thickness of the drive tube 220; when the drive tube 220 moves relative to the adjustment tube 230 in the axial direction of the adjustment tube 230, the lower section 252 of the threaded pin 250 moves relative to each other within the anti-rotation groove 223, and there is a large gap in the radial direction between the two and they do not contact.

[0102] Specifically, in this embodiment, as Figure 2 and Figure 4 shown, the depth of the anti-rotation groove 223 is less than the wall thickness of the drive tube 220, that is, the anti-rotation groove 223 does not penetrate the drive tube 220. For example, when the wall thickness of the drive tube 220 is set to 12 mm, the depth of the anti-rotation groove 223 can be 5 mm, 6 mm, 7 mm or other depths, and this embodiment does not make specific limitations on this. The length of the anti-rotation groove 223 extends along the axial direction of the drive tube 220. When the drive tube 220 moves relative to the adjustment tube 230 in the axial direction of the adjustment tube 230, the lower section 252 of the threaded pin 250 can move relative to each other within the anti-rotation groove 223.

[0103] The implementation mode of this embodiment also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10. The test device 200 further includes a cover 270. The cover 270 is snap-connected to one end face of the drive tube 220 close to the air inlet and is arranged at the air inlet of the compressor housing 110. A buckle 271 is arranged on the cover 270, and a card slot 224 adapted to the buckle 271 is arranged on one end face of the drive tube 220.

[0104] Specifically, in this embodiment, the cover 270 and the drive tube 220 can also be connected by screwing, riveting, flange connection or other means. Preferably, the snap connection method is selected in this embodiment.

[0105] More specifically, in this embodiment, air enters the intake passage of the compressor 100 from the cover 270, and the cover 270 is detachably connected to the drive tube 220 through the buckle 271, making the disassembly and assembly simpler and more convenient.

[0106] The implementation mode of this embodiment also discloses a test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10, as Figure 4 shown, there are multiple buckle 271, each buckle 271 is provided with a spherical head, and the head is provided with an opening, and the opening is telescopically arranged.

[0107] Specifically, in this embodiment, the number of buckles 271 can be set to 2, 3, 4 or other numbers, and those skilled in the art can design according to actual needs. Further, multiple buckles 271 can be evenly and spacedly arranged on the cover 270, so that the cover 270 is more stably clamped, as Figure 4 shown in the partial enlarged view, the telescopic arrangement of the opening means that the size opening of the opening can be adjusted, which is convenient for the assembly and disassembly of the cover 270.

[0108] More specifically, in this embodiment, multiple buckles 271 are provided to make the cover 270 and the drive tube 220 more firmly clamped. Each buckle 271 is provided with a spherical head, which is more stable after clamping, and the spherical head can also be easily separated from the card slot 224 during disassembly.

[0109] Example 2

[0110] The implementation mode of this embodiment discloses a test method for the test device 200 for suppressing the intake noise of the compressor 100 of the supercharger 10, as Figure 6 shown, the test method includes:

[0111] S1. When the initial values of the width and depth of the annular groove 222 are both set to zero, the supercharged engine performs a rapid acceleration and deceleration test to detect whether there is intake noise in the compressor 100;

[0112] If not, it is determined that there is no need to provide an annular groove 222 in the compressor 100;

[0113] If so, go to step S2;

[0114] S2. Drive the drive tube 220 to move in the axial direction of the adjustment tube 230 through the eccentric wheel shaft assembly 210 to adjust the width of the annular groove 222, and when the annular groove 222 is at different widths, perform a rapid acceleration and deceleration test on the supercharged engine respectively to detect whether there is intake noise in the compressor 100;

[0115] If it is detected that there is intake noise in the compressor 100 under all different widths of the annular groove 222, go to step S3;

[0116] If it is detected that there is no intake noise in the compressor 100, record the current width and current depth of the annular groove 222;

[0117] S3. Adjust the depth of the annular groove 222 by replacing the drive tube 220 and the adjustment tube 230 with different thicknesses in combination, and repeat the above step S2 when the annular groove 222 is at different depths.

[0118] Specifically, in this embodiment, please refer to Figure 6 and Figure 7 , Figure 7 which is a schematic diagram of this test method on the compressor pulse spectrum. Figure 7 The abscissa of Figure 7 represents the intake air flow rate of the supercharger, and the ordinate represents the pressure ratio of the supercharger. The thick circuitous curve in the lower left corner represents the working operation curve during rapid acceleration and deceleration of the vehicle, and the shaded area is the noise concern area. Specifically, after quickly stepping on the accelerator, the intake air flow rate and pressure increase rapidly. After releasing the accelerator, due to inertia, the gas pressure drops slowly. Generally, after a certain period of time (within about 1 second), the engine will generate intake noise, causing complaints from the vehicle occupants. As shown in the part circled by the dotted line in the figure, the noise is relatively large at this time. By optimizing the design of the annular groove 222, the noise in the entire shaded area can be reduced, as well as the noise level in the specific intake noise complaint area. The optimal annular groove 222 obtained through this test device 200 and test method can reduce the overall intake air flow noise by about 5 dB while maintaining the performance of the original engine.

[0119] Specifically, in this embodiment, as Figure 6 shown, when testing the intake noise of the compressor 100 through this test device 200, first detect the intake noise when the annular groove 222 is not set. When detecting the intake noise, conduct a rapid acceleration and deceleration test through the whole vehicle to simulate the vehicle driving condition. For example, detect the engine speed accelerating from idle speed to about 2000 rpm. If the intake noise is small or no noise is generated when the annular groove 222 is not set, there is no need to set the annular groove 222.

[0120] If the intake noise is relatively large during the rapid acceleration and deceleration test without setting the annular groove 222, then conduct an annular groove 222 adjustment test. Drive the drive tube 220 to move in the axial direction of the adjustment tube 230 through the eccentric wheel shaft assembly 210 to adjust the width of the annular groove 222. When the annular groove 222 is at different widths, conduct rapid acceleration and deceleration tests on the supercharged engine respectively. If it is detected that the compressor 100 has no intake noise or the intake noise is the smallest, record the current width and current depth of the annular groove 222.

[0121] If the intake noise is still relatively large when setting different widths of the annular groove 222, adjust the depth of the annular groove 222 by replacing the drive tube 220 and the adjustment tube 230 with different thicknesses, and repeat the test of different widths of the annular groove 222 when the annular groove 222 is at different depths. Finally, detect the width and depth of the annular groove 222 when the compressor 100 has no intake noise or the intake noise is the smallest.

[0122] More specifically, in this embodiment, when testing the intake noise of the compressor 100 through the test device 200, it is possible to detect the intake noise when the annular groove 222 is not provided, and also to detect the intake noise when the annular groove 222 is provided and the widths of the annular grooves 222 are different; it is also possible to replace the driving tube 220 and the adjusting tube 230 with different thicknesses according to requirements to adjust the depth of the annular groove 222, and continue to test the annular groove 222 with different widths at different depths. Thus, the optimal depth value and width value of the annular groove 222 can be obtained. The test process is simple and convenient, easy to operate, and the test data is also relatively complete and accurate.

[0123] The embodiment of the present implementation manner also discloses a test method for a test device 200 applied to suppressing the intake noise of the compressor 100 of the supercharger 10. The width of the annular groove 222 is a single-valued corresponding function of the angular displacement of the driving rocker arm 213 or the opening position of the actuator 260. By detecting the angular displacement of the driving rocker arm 213 or the opening position of the actuator 260, the corresponding width of the annular groove 222 can be obtained.

[0124] Specifically, in this embodiment, because the actuator 260 acts to drive the push rod 280 to act, and further drives the driving rocker arm 213 to rotate through the push rod 280, the angular displacement of the driving rocker arm 213 and the opening position of the actuator 260 can both be used to calculate the width of the annular groove. The angular displacement of the driving rocker arm 213 and the opening position of the actuator 260 can be detected by sensors. For example, the sensors can be common angle sensors or displacement sensors, etc.

[0125] More specifically, in this embodiment, the width of the annular groove 222 can be calculated or tested through different angular displacements of the driving rocker arm 213 or the opening positions of the actuator 260. When the intake noise of the compressor 100 is detected to be the minimum or there is no intake noise, by substituting the detected angular displacement of the driving rocker arm 213 or the opening position of the actuator 260 into the corresponding single-valued corresponding function, the width of the annular groove 222 can be obtained quickly and accurately.

[0126] In summary, the present invention provides a test device 200 and a test method for suppressing the intake noise of the compressor 100 of the supercharger 10. Through this test device 200, the optimal values of the width and depth of the annular groove 222 required to be set for different compressors 100 can be determined, reducing the test workload and the number of test specimens. This test device 200 works in cooperation by setting an eccentric camshaft assembly 210, a drive tube 220, an adjustment tube 230, and a spring 240. An adjustable annular groove 222 is formed between the drive tube 220 and the adjustment tube 230 and the abutting surface 112 of the compressor 100. The drive tube 220 can be adjusted to move within the adjustment tube 230 through the eccentric camshaft assembly 210, and thus the optimal value of the annular groove 222 can be obtained. The hardware equipment and test steps are minimized as much as possible, and the best solution can be obtained by experimentally optimizing the size of the annular groove 222. The test device 200 of the present invention is convenient to use and maintain, is applicable to the NVH test of vehicle supercharged engines, and is of great benefit to improving the working performance of the intake system of supercharged engines.

[0127] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and detail, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An experimental device for suppressing the intake noise of a supercharger compressor, the experimental device is arranged in the intake duct of the compressor, the compressor includes a compressor housing, a compressor rear cover, a compressor shaft and an impeller, the compressor housing is connected to the compressor rear cover, the intake duct is formed inside the compressor housing, and the impeller is sleeved on the compressor shaft. Characterized in that, The inner wall surface of the compressor housing is of a stepped structure, and an abutting surface is formed at one end of the inner wall surface of the compressor housing close to the compressor rear cover. The experimental device is sleeved on the inner wall surface of the compressor housing, and one end of the experimental device abuts against the abutting surface; wherein, The experimental device includes an eccentric wheel shaft assembly, a driving pipe, an adjusting pipe and a spring. The outer wall surface of one end of the driving pipe is sleeved with the spring, and one end of the driving pipe is sleeved inside the adjusting pipe. An annular protruding step is arranged on the outer wall surface of the driving pipe. One end of the spring abuts against one side of the protruding step, and the other end abuts against the end surface of one end of the adjusting pipe. The eccentric wheel shaft assembly contacts the other side of the protruding step. The spring makes the eccentric wheel shaft assembly always fit with the other side of the protruding step. A shaft sleeve is arranged on the compressor housing, and the eccentric wheel shaft assembly is rotatably sleeved with the shaft sleeve. The other end of the adjusting pipe abuts against the abutting surface. A ring groove is formed around between the end surface of one end of the driving pipe, the abutting surface and the inner wall surface of the adjusting pipe. The wall thickness of one end of the driving pipe is equal to the depth of the ring groove; and, When the eccentric wheel shaft assembly rotates, the eccentric wheel shaft assembly drives the driving pipe to move in the axial direction of the adjusting pipe relative to the adjusting pipe to adjust the width of the ring groove; wherein The experimental device further includes a threaded pin, the threaded pin includes an upper section and a lower section, the diameter of the upper section is larger than that of the lower section, and an external thread is arranged on the outer wall surface of the upper section; and, A threaded hole adapted to the upper section is arranged on the compressor housing, a circumferential groove is arranged on the adjusting pipe, the circumferential groove extends along the circumferential direction of the adjusting pipe, a rotation prevention groove is correspondingly arranged on the driving pipe, the rotation prevention groove extends along the axial direction of the driving pipe, and the threaded pin passes through the threaded hole and the circumferential groove and is in clearance fit with the rotation prevention groove to limit the axial movement of the adjusting pipe and the circumferential rotation of the driving pipe, and the threaded pin can move in the axial direction of the driving pipe relative to the rotation prevention groove.

2. The experimental device for suppressing the intake noise of a supercharger compressor according to claim 1, Characterized in that, The eccentric wheel shaft assembly includes a rotating shaft, an eccentric wheel, a driving rocker arm and a rocker arm pin. One end of the rotating shaft is connected to the eccentric wheel, and the other end is connected to the driving rocker arm. The rocker arm pin is arranged at a position of the driving rocker arm far from the rotating shaft. The rotating shaft is rotatably sleeved with the shaft sleeve; wherein, The rotation center of the eccentric wheel and the axis line of the rotating shaft are located on the same straight line. When the eccentric wheel rotates, the eccentric wheel drives the drive tube to move in the axial direction of the adjustment tube to adjust the width of the annular groove.

3. The test device for suppressing the intake noise of a supercharger compressor as described in claim 2, characterized in that, the eccentric wheel shaft assembly further includes an elastic pad, and the elastic pad is arranged between the drive rocker arm and the bushing; and, it further includes a push rod and an actuator. One end of the push rod is rotatably connected to the actuator, and the other end of the push rod is rotatably connected to the rocker arm pin. The rocker arm pin and the drive rocker arm are driven to rotate by the actuator and the push rod.

4. The test device for suppressing the intake noise of a supercharger compressor as described in claim 3, characterized in that, a relief groove is arranged at a position of the protruding step away from the eccentric wheel shaft assembly.

5. The test device for suppressing the intake noise of a supercharger compressor as described in any one of claims 1-4, characterized in that, the depth of the anti-rotation groove is less than the thickness of the drive tube; when the drive tube moves relative to the adjustment tube in the axial direction of the adjustment tube, the lower section of the threaded pin moves relative to the anti-rotation groove.

6. The test device for suppressing the intake noise of a supercharger compressor as described in claim 5, characterized in that, the test device further includes a cover. The cover is clamped to one end face of the drive tube close to the air inlet and is arranged at the air inlet of the compressor housing. A buckle is arranged on the cover, and a clamping groove adapted to the buckle is arranged on the one end face of the drive tube.

7. The test device for suppressing the intake noise of a supercharger compressor as described in claim 6, characterized in that, a plurality of buckles are arranged, each buckle is provided with a spherical head, and an opening is arranged on the head, and the opening is arranged to be telescopic.

8. A test method applied to the test device for suppressing the intake noise of a supercharger compressor as described in any one of claims 1-7, characterized in that, the test method includes: S1. When the initial values of the width and depth of the annular groove are both set to zero, the supercharged engine performs a rapid acceleration and deceleration test to detect whether there is intake noise in the compressor; if not, it is determined that there is no need to set an annular groove in the compressor; if so, go to step S2; S2. Drive the drive tube to move in the axial direction of the adjustment tube through the eccentric wheel shaft assembly to adjust the width of the annular groove. When the annular groove is at different widths, the supercharged engine is respectively subjected to a rapid acceleration and deceleration test to detect whether there is intake noise in the compressor; if it is detected that the compressor has intake noise under all different widths of the annular groove, go to step S3; if it is detected that the compressor has no intake noise, record the current width and current depth of the annular groove; S3. Adjust the depth of the annular groove by replacing different combinations of the drive tube and the adjustment tube with different thicknesses. When the annular groove is at different depths, repeat the above step S2.

9. The test method applied to the test device for suppressing the intake noise of a supercharger compressor as described in claim 8, characterized in that, The width of the annular groove is a single-valued corresponding function of the angular displacement of the driving rocker arm of the eccentric wheel shaft assembly or the opening position of the actuator for driving the driving rocker arm, and the width of the annular groove is obtained by detecting the angular displacement of the driving rocker arm or the opening position of the actuator.

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