A pulse jet performance testing device for bag-type dust collectors

Abstract

The present application relates to dust removal technical field, specifically to a kind of bag type dust collector pulse jet performance testing device, including simulation component, test component, adjusting component and differential measurement component;Differential measurement component includes first acceleration sensor, second acceleration sensor, differential roller, connecting bearing and cantilever piece;Through differential guide groove constraint differential roller directional rolling, and utilize the differential measurement mode of motion transmission of cantilever piece, realize the accurate decomposition to filter bag compound motion acceleration, effectively distinguish the effective dust removal movement and invalid swing movement generated when filter bag is jetted and expanded, improve the accuracy of jet performance test, solve the problem that measured composite acceleration cannot accurately reflect pulse jet performance in pulse jet performance test process.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology, and more specifically to a pulse jet performance testing device for bag filters. Background Technology

[0002] The pulse jet cleaning performance testing device for bag filters is an experimental platform used to test and optimize the performance of bag filters. It simulates the pulse jet cleaning action of bag filters and uses sensors such as pressure and acceleration to accurately measure and optimize key performance data such as air consumption and cleaning intensity during the process. This guides the development of bag filters with stronger cleaning effect, lower energy consumption, and longer filter bag life.

[0003] Existing technologies primarily evaluate pulse jet cleaning performance using accelerometers, pressure sensors, and dust concentration meters. During testing, an accelerometer (piezoelectric accelerometer) is mounted on the filter bag. During the jet cleaning process, as the filter bag accelerates outward, the internal mass of the accelerometer compresses the piezoelectric crystal due to inertia, generating a voltage signal. This voltage signal is used to calculate the acceleration, which reflects the impact force exerted on the filter bag by the pulsed airflow. After the impact, the filter bag vibrates rapidly back and forth, with each vibration reaching its maximum velocity in one direction. The rapid back-and-forth change from the maximum value in one direction to the maximum value in another direction involves drastic acceleration changes. An accelerometer can record the waveform throughout the entire process, analyze its frequency and attenuation, and thus evaluate the pulse jet performance. The acceleration that is desired in this test is actually a pure radial acceleration or the ratio of radial acceleration to acceleration in other directions. However, in the actual test, the pulse airflow will cause the filter bag to move up and down and twist and sway, which will cause acceleration measurement errors, resulting in the acceleration measurement results not being able to accurately reflect the actual pulse jet performance.

[0004] In view of the above, in order to overcome the above technical problems, the present invention designs a pulse jet cleaning performance testing device for bag dust collectors. Summary of the Invention

[0005] This invention provides a pulse jet performance testing device for bag filters, solving the problem that the composite acceleration measured during pulse jet performance testing cannot accurately reflect the pulse jet performance. By adjusting the component to drive the guide rail ring to automatically rise and fall along the moving track, a complete test of the entire length of the filter bag is achieved. By constraining the differential rollers with differential guide grooves for directional rolling and using cantilever plates for motion transmission, a differential measurement method is used to accurately decompose the composite motion acceleration of the filter bag, effectively distinguishing between the effective dust removal motion and the ineffective swaying motion generated by the filter bag during jet expansion, thus improving the accuracy of the jet performance test.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pulse jet performance testing device for a bag filter includes an air compressor, an air tank, a pulse valve, and a test chamber. It also includes a simulation component, a testing component, an adjustment component, and a differential measurement component. The simulation component is connected to the test chamber. The testing component is housed within the test chamber. The differential measurement component includes a first acceleration sensor and a second acceleration sensor. The first acceleration sensor is connected to the testing component and is used to measure the composite motion acceleration of the surface of the object under test within the testing component. The second acceleration sensor is connected to the adjustment component and is used to decompose the composite motion acceleration measured by the first acceleration sensor.

[0008] Preferably, the simulation component includes a dust channel, an air outlet channel, and a variable frequency fan; the dust channel is located at the bottom of the test chamber; the air outlet channel is located at the top of the test chamber; the variable frequency fan is connected to the air outlet channel; the test component includes a pulse jet channel, a mounting frame, and a filter bag; the pulse jet channel is connected to an air tank; the mounting frame is located below the pulse jet channel, and a fixing screw hole is provided at the bottom of the mounting frame; the filter bag is fitted onto the mounting frame, and a fixing hole is provided at the bottom of the filter bag.

[0009] In the above scheme, a variable frequency fan draws dust-laden gas from the dust channel into the test chamber, allowing the dust in the gas to come into contact with the filter bags. This enables the filter bags to fully simulate the dust distribution on the filter bags after a period of use in a baghouse dust collector, ensuring that the dust distribution matches the actual working conditions of the baghouse dust collector. This guarantees the accuracy of subsequent pulse jet performance tests. Compressed air is ejected from the pulse jet channel through an air compressor and pulse valve, ensuring a full simulation of the pulse jet process of a baghouse dust collector. Furthermore, the bottom of the filter bags can be fixedly connected to the mounting frame through fixing holes. By fixing the bottom of the filter bags, some working conditions with fixed filter bag bottoms can be simulated. After setting the test chamber to a transparent structure, by fixing the bottom of the filter bags, the radial expansion changes of the filter bags caused by pulse jets can be observed more intuitively during the jet cleaning process.

[0010] Preferably, the adjustment assembly includes a moving track, a guide ring, and an electric push rod; the moving track is symmetrically arranged on the inner wall of the test chamber; the guide ring is concentrically arranged with the mounting frame, a sliding strip is provided on the outer wall of the guide ring, and a differential guide groove is provided on the inner wall of the guide ring; the sliding strip is slidably installed in the moving track; the electric push rod is connected to the bottom of the sliding strip.

[0011] In the above scheme, the height of the guide ring can be freely adjusted by the electric push rod, and the differential measurement component can be slid together by adjusting the height of the guide ring. This allows the differential measurement component to perform acceleration tests on different heights and positions of the filter bag, thereby determining the impact of the jet cleaning effect on different positions of the filter bag and achieving a comprehensive test of the jet cleaning performance. Through this adjustment component, the measurement points are automatically and accurately positioned. Operators can control the electric push rod externally without opening the test box, enabling multi-point measurements along the entire length of the filter bag (upper, middle, and lower parts). This improves testing efficiency and provides complete data on the distribution of cleaning energy along the length of the filter bag, achieving a comprehensive diagnosis of the jet cleaning performance.

[0012] Preferably, the differential measurement assembly further includes a differential roller, a connecting bearing, and a cantilever plate; the differential roller is rotatably mounted in the differential guide groove; the cantilever plate is connected to the differential roller via the connecting bearing; one end of the first acceleration sensor is connected to the cantilever plate, and the other end is mounted on the filter bag; the second acceleration sensor is located at the end where the cantilever plate is connected to the differential roller.

[0013] In the above scheme, the differential guide groove on the guide ring provides a constraint trajectory, allowing the differential roller to perform directional rolling motion within the differential guide groove. Using this constraint trajectory, the motion of the filter bag can be decomposed. The swaying motion of the filter bag will drive the roller to roll within the differential guide groove. At this time, the second accelerometer will capture the tangential motion signal and calculate the tangential acceleration. The tangential acceleration calculated here is the tangential acceleration at the point where the second accelerometer is located. It needs to be calculated based on the distance from that point to the center of the filter bag and the radius of the filter bag after expansion at the same moment. The tangential acceleration at the point measured by the first accelerometer on the surface of the filter bag needs to be calculated based on the distance from that point to the center of the filter bag and the radius of the filter bag after expansion at the same moment. The radial expansion of the filter bag will cause the first accelerometer on the cantilever plate to capture a mixed motion signal of radial acceleration and tangential acceleration. By comparing and processing these two signals, the pure radial acceleration can be separated.

[0014] Preferably, the cantilever plate is a rolling telescopic structure.

[0015] In the above scheme, the cantilever plate structure is optimized into a telescopic structure containing micro-balls inside, so that the movement of the cantilever plate in the radial direction is a low-friction telescopic movement. When the filter bag expands radially, the cantilever plate will expand and contract, so that the first acceleration sensor can move together with the telescopic movement of the cantilever plate, and reduce the influence of friction generated by tangential movement on radial movement, thereby more accurately capturing the real dynamic movement process of radial expansion.

[0016] Preferably, the differential roller has a cylindrical structure, and ball contact heads are symmetrically arranged on the upper and lower end faces of the differential roller.

[0017] In the above scheme, the contact method between the differential roller and the differential guide groove is optimized. The cylindrical roller body ensures the stability of rolling, and the connecting bearing can significantly reduce the tangential motion friction resistance. The ball contact heads at the upper and lower ends transform the potential sliding friction between the roller and the top and bottom surfaces of the differential guide groove into point contact rolling friction, which greatly reduces the friction resistance of the differential roller when moving in the differential guide groove, especially when subjected to vertical force. This allows the differential roller to respond more sensitively and without lag to the tangential swaying motion of the filter bag, ensuring that the second acceleration sensor can capture a purer and more accurate swaying motion signal.

[0018] Preferably, piezoelectric sheets are provided on both the upper and lower end faces of the differential guide groove.

[0019] In the above scheme, a piezoelectric sheet is integrated on the differential guide groove. When the ball contact head on the differential roller squeezes the upper and lower end faces of the guide groove due to the axial vibration of the filter bag, the piezoelectric sheet will generate a voltage signal due to the pressure. By analyzing the difference and combination of the signals of the upper and lower piezoelectric sheets, the acceleration in the axial direction can be calculated.

[0020] Preferably, the differential rollers and cantilever plates are both made of lightweight high-strength alloys or carbon fiber composite materials.

[0021] The above scheme selects lightweight, high-strength alloys, such as aerospace aluminum, titanium alloys, or carbon fiber composite materials. The core purpose is to reduce the weight of these components as much as possible while ensuring sufficient structural rigidity and strength. The lighter the component, the smaller its reaction force on the filter bag, i.e., the smaller the measurement interference. This ensures that the measurement is of the filter bag's near-natural and real motion state, and enables the entire system to respond to the high-frequency vibration of the filter bag more quickly and sensitively, capturing richer dynamic details.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. Compared with existing pulse jet performance testing devices, this invention constrains the motion trajectory of the differential rollers through the differential guide groove on the guide ring, accurately decomposing the composite motion of the filter bag. The swaying motion of the filter bag is converted into the rolling motion of the differential rollers in the differential guide groove, which is captured by the second acceleration sensor. The radial expansion of the filter bag is mainly transmitted to the first acceleration sensor through the cantilever plate. The axial acceleration of the filter bag is captured by the piezoelectric plate. Finally, through the three motion signals, the pure radial, tangential and axial accelerations are separated from the complex mixed vibration, and the pulse jet performance is evaluated more accurately by the ratio of the three.

[0024] 2. This invention optimizes the cantilever plate into a rolling, telescopic structure and sets the contact end of the differential roller as a ball contact head, which reduces the frictional resistance during the test motion. At the same time, the differential roller and cantilever plate are made of lightweight, high-strength alloy or carbon fiber composite material, which reduces the mass of the measuring components themselves, thereby reducing interference with the natural motion state of the filter bag. This allows the entire system to respond to the high-frequency vibration of the filter bag more quickly and sensitively, capture richer dynamic details, and thus ensure the accuracy and reliability of the measurement results.

[0025] 3. By adjusting the coordinated operation of the electric push rod and guide rail ring in the component, the present invention can drive the differential measurement component to automatically rise and fall on the moving track. This allows the entire pulse jet performance testing device to perform multi-point acceleration tests at different heights along the entire length of the filter bag without manual intervention. This not only improves testing efficiency but also obtains complete data on the distribution of cleaning energy along the length of the filter bag, achieving comprehensive testing of pulse jet performance. Compared with traditional testing methods, this method reduces the number of acceleration sensors used and increases the coverage of test points. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is an overall structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the test chamber of the present invention;

[0029] Figure 3 This is a cross-sectional view of the internal structure of the guide ring of the present invention;

[0030] Figure 4 This is a cross-sectional view of the present invention;

[0031] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0032] Figure 6 for Figure 4 Enlarged view of the structure at point B in the middle;

[0033] Figure 7 This is a schematic diagram of the differential roller structure of the present invention.

[0034] In the diagram: 1. Air compressor; 2. Air manifold; 3. Pulse valve; 4. Test chamber; 5. Simulation component; 51. Dust channel; 52. Air outlet channel; 53. Variable frequency fan; 6. Test component; 61. Pulse jet channel; 62. Mounting frame; 621. Fixing screw hole; 63. Filter bag; 631. Fixing hole; 7. Adjustment component; 71. Moving track; 72. Guide rail ring; 721. Sliding bar; 722. Differential guide groove; 7221. Piezoelectric element; 73. Electric actuator; 8. Differential measurement component; 81. First accelerometer; 82. Second accelerometer; 83. Differential roller; 831. Ball contact head; 84. Connecting bearing; 85. Cantilever plate. Detailed Implementation

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0036] Please see Figures 1 to 7 This invention provides a pulse jet cleaning performance testing device for baghouse dust collectors, the technical solution of which is as follows:

[0037] As a specific embodiment of the present invention, refer to Figure 1 , Figure 2 and Figure 3 A pulse jet performance testing device for a bag filter includes an air compressor 1, an air manifold 2, a pulse valve 3, and a test chamber 4. Its features include: a simulation component 5, a test component 6, an adjustment component 7, and a differential measurement component 8; the simulation component 5 is connected to the test chamber 4; the test component 6 is disposed within the test chamber 4; the differential measurement component 8 includes a first acceleration sensor 81 and a second acceleration sensor 82; the first acceleration sensor 81 is connected to the test component 6 and is used to measure the composite motion acceleration of the surface of the object under test in the test component 6; the second acceleration sensor 82 is connected to the adjustment component 7 and is used to decompose the composite motion acceleration measured by the first acceleration sensor 81.

[0038] As a specific embodiment of the present invention, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6The simulation component 5 includes a dust channel 51, an air outlet channel 52, and a variable frequency fan 53; the dust channel 51 is located at the lower part of the test chamber 4; the air outlet channel 52 is located at the upper part of the test chamber 4; the variable frequency fan 53 is connected to the air outlet channel 52; the test component 6 includes a pulse jet channel 61, a mounting frame 62, and a filter bag 63; the pulse jet channel 61 is connected to the air tank 2; the mounting frame 62 is located below the pulse jet channel 61, and a fixing screw hole 621 is provided at the bottom of the mounting frame 62; the filter bag 63 is fitted onto the mounting frame 62, and a fixing hole 631 is provided at the bottom of the filter bag 63. Dust-laden gas is drawn into the test chamber 4 through the dust channel 51 by the variable frequency fan 53, allowing the dust in the gas to come into contact with the filter bag 63. This allows the filter bag 63 to completely simulate the dust distribution state on the filter bag 63 after a period of use of the bag filter, ensuring that the dust distribution state matches the actual working conditions of the bag filter, thereby ensuring the accuracy of subsequent pulse jet performance tests. Compressed air is ejected from the pulse jet channel 61 through the air compressor 1 and the pulse valve 3, ensuring that the pulse jet process of the bag filter is simulated throughout. The bottom of the filter bag 63 can be fixedly connected to the mounting frame 62 through the fixing hole 631. By fixing the bottom of the filter bag 63, some working conditions of fixing the bottom of the filter bag 63 can be simulated. After setting the test chamber 4 to a transparent structure, by fixing the bottom of the filter bag 63, the radial expansion change of the filter bag 63 caused by the pulse jet can be observed more intuitively during the jet.

[0039] As a specific embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 4 The adjustment component 7 includes a moving track 71, a guide ring 72, and an electric push rod 73; the moving track 71 is symmetrically arranged on the inner wall of the test chamber 4; the guide ring 72 is concentrically arranged with the mounting frame 62, a sliding bar 721 is provided on the outer wall of the guide ring 72, and a differential guide groove 722 is provided on the inner wall of the guide ring 72; the sliding bar 721 is slidably installed in the moving track 71; the electric push rod 73 is connected to the bottom of the sliding bar 721. The height of the guide ring 72 can be freely adjusted by the electric push rod 73, and the differential measurement component 8 can be moved to slide together by adjusting the height of the guide ring 72. This allows the differential measurement component 8 to perform acceleration tests on the filter bag 63 at different heights and positions, thereby determining the impact of the jet cleaning effect on different positions of the filter bag 63 and achieving a comprehensive test of the jet cleaning performance. Through this adjustment component 7, the measurement points are automatically and accurately positioned. The operator can control the electric push rod 73 externally without opening the test box 4, and perform multi-point measurements along the entire length of the filter bag 63 (upper, middle, and lower parts). This improves testing efficiency and provides complete data on the distribution of cleaning energy along the length of the filter bag 63, enabling a comprehensive diagnosis of the jet cleaning performance.

[0040] As a specific embodiment of the present invention, refer to Figure 3 , Figure 4 , Figure 5 and Figure 7The differential measurement assembly 8 further includes a differential roller 83, a connecting bearing 84, and a cantilever plate 85; the differential roller 83 is rotatably mounted in the differential guide groove 722; the cantilever plate 85 is connected to the differential roller 83 through the connecting bearing 84; one end of the first acceleration sensor 81 is connected to the cantilever plate 85, and the other end is mounted on the filter bag 63; the second acceleration sensor 82 is located at the end where the cantilever plate 85 is connected to the differential roller 83.The differential guide groove 722 on the guide ring 72 provides a constraint trajectory, allowing the differential roller 83 to perform directional rolling motion within the differential guide groove 722. Using this constraint trajectory, the motion of the filter bag 63 can be decomposed. The swaying motion of the filter bag 63 will drive the roller to roll within the differential guide groove 722. At this time, the second acceleration sensor 82 will capture the tangential motion signal and calculate the tangential acceleration. The tangential acceleration calculated here is the tangential acceleration at the point where the second acceleration sensor 82 is located. It needs to be calculated based on the distance from this point to the center of the filter bag 63 and the radius of the filter bag 63 after expansion at the same time. The tangential acceleration at the point measured by the first acceleration sensor 81 on the surface of the filter bag 63 needs to be calculated based on the distance from this point to the center of the filter bag 63 and the radius of the filter bag 63 after expansion at the same time. The radial expansion of filter bag 63 will cause the first acceleration sensor 81 on the cantilever plate 85 to capture a mixed motion signal of radial and tangential acceleration. By comparing and processing these two signals, the pure radial acceleration can be separated. The above measurement is performed when the top and bottom of filter bag 63 are fixed. When the bottom of filter bag 63 is not fixed, when filter bag 63 is impacted by pulsed airflow, it will generate complex spatial vibration. This vibration can be decomposed into three orthogonal motions: radial expansion motion, tangential swaying motion, and axial undulation motion. The overall lateral swaying of filter bag 63 will transmit the force to differential roller 83 through cantilever plate 85. Because differential roller 83 is... The differential guide groove 722 constrains the filter bag 63, allowing it to roll only along its trajectory. Therefore, the rocking motion of the filter bag 63 is converted into the rolling motion of the differential roller 83. The second acceleration sensor 82, mounted on the end of the cantilever plate 85 connected to the differential roller 83, has its measuring axis parallel to the tangential direction of the differential guide groove 722. Therefore, it can specifically and without interference measure the tangential acceleration caused by the rocking motion. Simultaneously, the first acceleration sensor 81, mounted on the cantilever plate 85 and in contact with the surface of the filter bag 63, follows the complex spatial motion of the filter bag surface. Therefore, it measures a composite acceleration including radial, tangential, and axial components. During processing, given the distance from the measuring point of the second accelerometer 82 to the center of the filter bag 63, and the distance from the measuring point of the first accelerometer 81 to the center of the filter bag 63 (i.e., the radius of the expanded filter bag 63), according to the principle of rigid body angular motion a=α×r, the equivalent tangential acceleration component at the location of the first accelerometer 81 can be calculated from the tangential acceleration measured by the second accelerometer 82. Then, this calculated and corrected tangential component is subtracted from the composite acceleration signal measured by the first accelerometer 81, thereby separating the composite acceleration of radial and axial acceleration. Further processing of this acceleration will yield acceleration in three directions. The cantilever plate 85 is a rolling telescopic structure.The cantilever plate 85 structure is optimized into a telescopic structure containing micro-balls inside. This telescopic structure uses the balls to allow an inner telescopic plate to slide inside the outer plate, so that the radial movement of the cantilever plate 85 is a low-friction rolling telescopic movement. When the filter bag 63 expands radially, the cantilever plate 85 will expand and contract, so that the first acceleration sensor 81 can move together with the telescopic movement of the cantilever plate 85, and reduce the influence of friction generated by tangential movement on radial movement, thereby more accurately capturing the real dynamic movement process of radial expansion.

[0041] As a specific embodiment of the present invention, refer to Figure 5 and Figure 7 The differential roller 83 has a cylindrical structure, and ball contact heads 831 are symmetrically arranged on the upper and lower end faces of the differential roller 83. The contact method between the differential roller 83 and the differential guide groove 722 is optimized. The cylindrical roller body ensures the stability of rolling, and in conjunction with the connecting bearing 84, it can significantly reduce the tangential motion friction resistance. The ball contact heads 831 at the upper and lower ends change the potential sliding friction between the roller and the top and bottom surfaces of the differential guide groove 722 into point contact rolling friction, which greatly reduces the friction resistance of the differential roller 83 when moving in the differential guide groove 722, especially when subjected to vertical force. This allows the differential roller 83 to respond more sensitively and without lag to the tangential swaying motion of the filter bag 63, ensuring that the second acceleration sensor 82 can capture a purer and more accurate swaying motion signal.

[0042] As a specific embodiment of the present invention, refer to Figure 4 , Figure 5 and Figure 7The differential guide groove 722 is provided with piezoelectric plates 7221 on both its upper and lower end faces. When the ball contact head 831 on the differential roller 83 presses against the upper and lower end faces of the guide groove due to the axial vibration of the filter bag 63, the piezoelectric plate 7221 generates a voltage signal due to the pressure. By analyzing the difference and combination of the signals from the upper and lower piezoelectric plates 7221, the acceleration in the axial direction can be calculated. When the filter bag 63 moves axially up and down, a dynamic force in the vertical direction is applied to the differential roller 83 through the cantilever plate 85 and the connecting bearing 84. When the filter bag 63 generates an upward acceleration, the differential roller 83, due to inertia, will generate an increased pressure between the ball contact head 831 at its upper end and the piezoelectric plate 7221 on its upper end face, while simultaneously, the ball contact head 831 at its lower end and the piezoelectric plate 7221 on its lower end face... The contact pressure between the piezoelectric plates 7221 will decrease accordingly. Conversely, when the filter bag 63 generates a downward acceleration, the pressure on the lower end face piezoelectric plate 7221 will increase, and the pressure on the upper end face piezoelectric plate 7221 will decrease. A data processing unit can be integrated on the guide ring 72. When the piezoelectric plate 7221 is under pressure, it will generate a voltage signal proportional to the pressure. The data processing unit will synchronously collect the voltage signals of the upper and lower piezoelectric plates 7221. By analyzing the difference between the two signals, the pre-calibrated relationship between the voltage signal and the force, and the equivalent mass of moving parts such as the differential roller 83, the axial acceleration of the filter bag 63 at the measurement point can be accurately calculated from the dynamic force signal measured by the piezoelectric plate 7221 according to Newton's second law F=ma.

[0043] As a specific embodiment of the present invention, refer to Figure 5 and Figure 7 The differential roller 83 and cantilever plate 85 are both made of lightweight high-strength alloy or carbon fiber composite material. The core purpose of selecting lightweight high-strength alloy, such as aerospace aluminum or titanium alloy, or carbon fiber composite material, is to reduce the weight of these components as much as possible while ensuring sufficient structural rigidity and strength. The lighter the component, the smaller its reaction force on the filter bag 63, i.e., the smaller the measurement interference, ensuring that the measurement is of the filter bag 63's near-natural and true motion state, and enabling the entire system to respond more quickly and sensitively to the high-frequency vibration of the filter bag 63, capturing richer dynamic details.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A pulse jet performance testing device for a bag filter, comprising an air compressor (1), an air manifold (2), a pulse valve (3), and a test chamber (4), characterized in that: It also includes a simulation component (5), a test component (6), an adjustment component (7), and a differential measurement component (8); the simulation component (5) is connected to the test box (4); the test component (6) is set inside the test box (4); the differential measurement component (8) includes a first acceleration sensor (81) and a second acceleration sensor (82); the first acceleration sensor (81) is connected to the test component (6) and is used to measure the composite motion acceleration of the surface of the object under test in the test component (6); the second acceleration sensor (82) is connected to the adjustment component (7) and is used to decompose the composite motion acceleration measured by the first acceleration sensor (81); The adjustment component (7) includes a guide ring (72), and a differential guide groove (722) is provided on the inner wall of the guide ring (72). The differential measurement assembly (8) further includes a differential roller (83), a connecting bearing (84), and a cantilever plate (85); the differential roller (83) is rotatably mounted in the differential guide groove (722); the cantilever plate (85) is connected to the differential roller (83) through the connecting bearing (84); one end of the first acceleration sensor (81) is connected to the cantilever plate (85), and the other end is mounted on the filter bag (63); the second acceleration sensor (82) is located at the end where the cantilever plate (85) is connected to the differential roller (83).

2. The pulse jet cleaning performance testing device for a bag filter according to claim 1, characterized in that: The simulation component (5) includes a dust channel (51), an air outlet channel (52), and a variable frequency fan (53); the dust channel (51) is located at the lower part of the test chamber (4); the air outlet channel (52) is located at the upper part of the test chamber (4); the variable frequency fan (53) is connected to the air outlet channel (52); the test component (6) includes a pulse jet channel (61), a mounting frame (62), and a filter bag (63); the pulse jet channel (61) is connected to the air tank (2); the mounting frame (62) is located below the pulse jet channel (61), and a fixing screw hole (621) is provided at the bottom of the mounting frame (62); the filter bag (63) is fitted on the mounting frame (62), and a fixing hole (631) is provided at the bottom of the filter bag (63).

3. The pulse jet cleaning performance testing device for a bag filter according to claim 2, characterized in that: The adjustment assembly (7) also includes a moving track (71) and an electric push rod (73); the moving track (71) is symmetrically arranged on the inner wall of the test box (4); the guide ring (72) is concentrically arranged with the mounting frame (62), and a sliding bar (721) is provided on the outer wall of the guide ring (72); the sliding bar (721) is slidably installed in the moving track (71); the electric push rod (73) is connected to the bottom of the sliding bar (721).

4. The pulse jet cleaning performance testing device for a bag filter according to claim 1, characterized in that: The cantilever plate (85) is a rolling telescopic structure.

5. The pulse jet cleaning performance testing device for a bag filter according to claim 1, characterized in that: The differential roller (83) has a cylindrical structure, and ball contact heads (831) are symmetrically arranged on the upper and lower end faces of the differential roller (83).

6. The pulse jet cleaning performance testing device for a bag filter according to claim 1, characterized in that: The differential guide groove (722) is provided with piezoelectric sheets (7221) on both the upper and lower end faces.

7. The pulse jet cleaning performance testing device for a bag filter according to claim 1, characterized in that: The differential roller (83) and the cantilever plate (85) are both made of lightweight high-strength alloy or carbon fiber composite material.

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