Silencing performance detection device for silencing pipe

Abstract

The utility model relates to the field of silencing pipe performance detection, in particular to a silencing performance detection device for a silencing pipe. The utility model provides a device for detecting the silencing performance of a silencing pipe, which can detect the silencing performance of the silencing pipe and the pressure loss of the silencing pipe at the same time, and improves the accuracy of the silencing performance detection result of the silencing pipe. A silencing performance detection device for a silencing pipe comprises a first motor, a first lead screw, a bottom plate and the like, the left portion of the bottom plate is connected with the first motor, and an output shaft of the first motor is connected with the first lead screw. According to the utility model, the second motor is started to drive the connecting rod to slide forwards, so that the pressure sensor extends into the silencing pipe of the automobile, and then the third motor is started to enable the pressure sensor to move to the front part and the rear part of the silencing pipe respectively, so that the pressure loss is detected, and the silencing performance of the silencing pipe can be detected while the silencing performance of the silencing pipe is detected. The pressure loss of the silencing tube is detected, and the accuracy of the silencing performance detection result of the sound tube is improved.

Description

Technical Field

[0001] The utility model relates to the field of muffler performance detection, in particular to a muffler performance detection device for a muffler. Background Art

[0002] With the rapid development of industrialization and transportation, the noise pollution problem caused by various mechanical equipment and vehicles is becoming increasingly serious. Among them, exhaust noise is one of the main noise sources. In order to effectively control exhaust noise, mufflers are widely used in the exhaust systems of internal combustion engines, generator sets, automobiles and other equipment.

[0003] The existing muffler performance testing device mainly uses a sound sensor to approach the muffler in operation to detect the muffler performance of the muffler. However, the performance of the muffler not only depends on its muffler effect, but is also closely related to its pressure loss. Excessive pressure loss can lead to problems such as reduced engine power and increased fuel consumption. The existing detection device lacks a pressure loss detection function, which may make the muffler performance test results incomplete and unable to accurately reflect the muffler performance of the muffler, which is relatively inconvenient.

[0004] Therefore, a device for detecting the sound-absorbing performance of a silencer pipe is now developed, which can detect the pressure loss of the silencer pipe while detecting the sound-absorbing performance of the silencer pipe, thereby improving the accuracy of the sound-absorbing performance detection result of the silencer pipe. Utility Model Content

[0005] In order to overcome the disadvantages that the existing detection device lacks the pressure loss detection function, which may make the silencer performance detection results of the silencer pipe incomplete and unable to accurately reflect the silencer performance of the silencer pipe, which is relatively inconvenient, the utility model provides a silencer pipe silencer performance detection device that can detect the silencer performance of the silencer pipe while detecting the pressure loss of the silencer pipe, thereby improving the accuracy of the silencer performance detection results.

[0006] A device for detecting the sound-absorbing performance of a silencer pipe includes a first motor, a first screw rod, a shell, a base plate, a noise detection component and a pressure loss detection component. The left part of the base plate is connected to the first motor, the first screw rod is connected to the output shaft of the first motor, the shell is threadedly connected to the first screw rod, the shell and the base plate are slidably connected, the shell is provided with a noise detection component capable of detecting the sound-absorbing performance, and the noise detection component is provided with a pressure loss detection component capable of detecting pressure loss.

[0007] To further explain, a limit block is provided on the right part of the first motor.

[0008] Further explanation: the shell is made of sound insulation material.

[0009] Further explanation: the noise detection component includes a second motor, a second screw rod, a connecting rod and a sound detector. The second motor is connected to the inner side of the left part of the shell, the second screw rod is connected to the output shaft of the second motor, the second screw rod is rotatably connected to the shell, the connecting rod is threadedly connected to the second screw rod, the connecting rod is slidably connected to the shell, and the sound detector is connected to the upper side of the middle part of the connecting rod.

[0010] Further explanation: a guide rod is provided on the right side inside the shell.

[0011] Further explanation: the pressure loss detection component includes a third motor, a bidirectional screw and a pressure sensor. The third motor is connected to the front side of the middle part of the connecting rod, and the bidirectional screw is connected to the output shaft of the third motor. The front and rear parts of the bidirectional screw output shaft are both threadedly connected to the pressure sensors, and the pressure sensors are both slidably connected to the connecting rod.

[0012] The beneficial effects of the present invention are as follows: the present invention starts the second motor to drive the connecting rod to slide forward, so that the pressure sensor extends into the muffler pipe of the automobile, and then starts the third motor to move the pressure sensor to the front and rear parts of the muffler pipe respectively to detect the pressure loss, thereby achieving the effect of being able to detect the pressure loss of the muffler pipe while detecting the muffler performance of the muffler pipe, thereby improving the accuracy of the muffler performance detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 It is a partial three-dimensional structural diagram of the utility model.

[0015] Figure 3 It is a partial three-dimensional structural diagram of the utility model.

[0016] Markings in the accompanying drawings: 1: first motor, 2: second motor, 3: third motor, 4: first screw rod, 5: second screw rod, 6: bidirectional screw rod, 7: connecting rod, 8: housing, 9: base plate, 10: pressure sensor, 11: sound detector. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] A device for detecting the noise reduction performance of a noise reduction pipe, such as Figure 1-Figure 3As shown, it includes a first motor 1, a first screw rod 4, a shell 8, a base plate 9, a noise detection component and a pressure loss detection component. The first motor 1 is connected to the left side of the base plate 9, the first motor 1 output shaft is connected to the first screw rod 4, the first screw rod 4 is threadedly connected to the shell 8, the shell 8 is made of sound insulation material, which can reduce external sound interference, the shell 8 is slidably connected to the base plate 9, the shell 8 is provided with a noise detection component that can detect the silencer performance, and the noise detection component is provided with a pressure loss detection component that can detect pressure loss.

[0019] like Figure 1 and Figure 2 As shown, the noise detection component includes a second motor 2, a second screw rod 5, a connecting rod 7 and a sound detector 11. The second motor 2 is connected to the inner side of the left part of the shell 8, the second screw rod 5 is connected to the output shaft of the second motor 2, the second screw rod 5 is rotatably connected to the shell 8, the connecting rod 7 is threadedly connected to the second screw rod 5, the connecting rod 7 is slidably connected to the shell 8, the sound detector 11 is connected to the upper side of the middle part of the connecting rod 7, a guide rod is provided on the right side of the inside of the shell 8 to facilitate guiding the connecting rod 7, and a limit block is provided on the right part of the first motor 1 to limit the shell 8.

[0020] like Figure 1 and Figure 3 The pressure loss detection component shown includes a third motor 3, a bidirectional screw rod 6 and a pressure sensor 10. The third motor 3 is connected to the front side of the middle part of the connecting rod 7, and the bidirectional screw rod 6 is connected to the output shaft of the third motor 3. The front and rear parts of the output shaft of the bidirectional screw rod 6 are both threadedly connected to the pressure sensor 10, and the pressure sensors 10 are all slidably connected to the connecting rod 7.

[0021] When using the utility model, first, the Ji'an bottom plate 9 is moved to the vicinity of the automobile muffler with detection, and then the first motor 1 is started to rotate the first screw rod 4, and then the shell 8 is slid under the action of the thread, and the position of the shell 8 is adjusted to adapt to the height of the muffler, and then the car is started to exhaust the muffler, and at the same time, the sound detector 11 detects the noise generated by the muffler exhaust, and then the second motor 2 can be started to rotate the second screw rod 5, driving the connecting rod 7 to slide forward on the shell 8, so that the bidirectional screw rod 6 and the pressure sensor 10 extend into the muffler of the car. Inside the sound tube, the third motor 3 is started again to rotate the bidirectional screw 6, so that the pressure sensor 10 moves to the front and rear parts of the muffler respectively. When the car is exhausting, the air pressure at the front and rear parts of the car can be detected by the pressure sensor 10, and the pressure loss of the muffler can be measured. If the pressure loss of the muffler is too large, the output power of the engine will be reduced, thereby affecting the overall performance of the equipment, and an optimized design is required, so that the pressure loss of the muffler can be detected while the muffler performance is detected, thereby improving the accuracy of the sound tube muffler performance test results.

[0022] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the noise reduction performance of a muffler pipe, characterized by: The invention comprises a first motor (1), a first screw rod (4), a housing (8), a bottom plate (9), a noise detection component and a pressure loss detection component. The left part of the bottom plate (9) is connected to the first motor (1), the output shaft of the first motor (1) is connected to the first screw rod (4), the first screw rod (4) is threadedly connected to the housing (8), the housing (8) and the bottom plate (9) are slidably connected, the housing (8) is provided with a noise detection component capable of detecting the silencing performance, and the noise detection component is provided with a pressure loss detection component capable of detecting the pressure loss.

2. The device for detecting the muffler performance of a muffler according to claim 1, wherein: A limiting block is provided on the right part of the first motor (1).

3. The device for detecting the muffler performance of a muffler according to claim 2, wherein: The housing (8) is made of sound-insulating material.

4. The device for detecting the muffler performance of a muffler according to claim 2, wherein: The noise detection component comprises a second motor (2), a second screw rod (5), a connecting rod (7) and a sound detector (11); the second motor (2) is connected to the inner side of the left portion of the housing (8); the second screw rod (5) is connected to the output shaft of the second motor (2); the second screw rod (5) is rotatably connected to the housing (8); the connecting rod (7) is threadedly connected to the second screw rod (5); the connecting rod (7) is slidably connected to the housing (8); and the sound detector (11) is connected to the upper side of the middle portion of the connecting rod (7).

5. The device for detecting the muffler performance of a muffler according to claim 4, wherein: A guide rod is provided on the right side inside the housing (8).

6. The device for detecting the noise reduction performance of a noise reduction pipe according to claim 4, wherein: The pressure loss detection component comprises a third motor (3), a bidirectional screw rod (6) and a pressure sensor (10); the front side of the middle portion of the connecting rod (7) is connected to the third motor (3); the output shaft of the third motor (3) is connected to the bidirectional screw rod (6); the front and rear portions of the output shaft of the bidirectional screw rod (6) are both threadedly connected to the pressure sensor (10); and the pressure sensor (10) is slidably connected to the connecting rod (7).

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