A noise reduction control system for large air volume Roots blower

Abstract

The present invention discloses a silencer control system for a large-air-volume Roots blower, which belongs to the technical field of blower silencer. The system includes an engine, a Roots blower, a transmission component, an exhaust and side-supply air silencer, a detection component and a controller. When the system is in operation, the main air inlet at the bottom of the Roots blower receives the main airflow, while the side-supply air inlet at the top receives the secondary airflow through the side-supply air silencer. The two are matched in the blower to achieve preliminary noise reduction. The airflow after noise reduction is discharged from the air outlet at the top of the blower, enters the exhaust silencer for secondary noise reduction, and is finally discharged through the air outlet of the exhaust silencer. The detection component is installed in the pipeline in front of the main air inlet for monitoring the air volume. The controller receives the detection data, generates the side-supply air control instruction according to the preset rules, and allows the operator to adjust the air intake opening of the side-supply air silencer through the human-computer interaction unit. The present invention effectively improves the working efficiency and noise reduction effect of the Roots blower through precise air volume matching and dual noise reduction design.

Description

Technical Field

[0001] The invention relates to a silencer control system for a Roots blower with a large air volume, belonging to the technical field of blower silencers. Background Art

[0002] Roots blowers with high air volume and high negative pressure are widely used in the extraction and transfer of materials such as grain, sand, and sludge. However, the noise generated during operation poses a serious threat to the health of operators and the surrounding environment. Therefore, solving the noise problem during operation of Roots blowers has become a major challenge in promoting the application of these blowers.

[0003] To address the noise problem of Roots blowers, silencer measures usually include two aspects: air supply silencer and exhaust silencer. The specific form of the silencer system and the design style of the silencer have a direct impact on the overall silencer effect of the Roots blower. Currently, most Roots blowers on the market focus on the research and application of exhaust silencer, while relatively less attention is paid to side air supply silencer. In terms of air supply silencer, the styles of existing air supply silencers are often similar to those of exhaust silencers, but it is worth noting that there are significant differences in the working principles of exhaust silencers and air supply silencers. If the two are treated equally, the effect of air supply silencer will be seriously weakened. In addition, the inhaled air needs to be filtered during the air supply silencer process to prevent foreign matter from being inhaled and damaging the blower. At the same time, the matching degree of the intake and exhaust systems is also directly related to the noise reduction effect of the blower.

[0004] Therefore, considering the differences between air supply silencer and exhaust silencer, as well as factors such as filtering and matching, it is urgent to provide a new and effective silencer system for large-volume Roots blowers to specifically solve the relevant technical defects faced in the existing technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a silencer control system for a large air volume Roots blower, which aims to adjust the air supply flow area according to the air volume and air pressure during operation by adopting a side air supply silencer with adjustable air supply opening, so as to ensure that the working conditions of the air supply volume and the air outlet volume match, thereby achieving efficient noise reduction of the entire system.

[0006] In order to achieve the above objectives / solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0007] The present invention provides a muffler control system for a large air volume Roots blower, which comprises: an engine, a Roots blower, a transmission component, an exhaust muffler, a side air supply muffler, a detection component and a controller; the engine outputs power through a power output assembly, and drives the Roots blower to operate through the transmission component;

[0008] The Roots blower is provided with a first air inlet at the bottom thereof, for supplying a primary air flow into the Roots blower through a first connecting pipe; the side air supply muffler is mounted above the Roots blower through a first supporting assembly, and the side air supply muffler is provided with a first air outlet at the bottom thereof, and the first air outlet is connected to the second air inlet at the top of the Roots blower through a second connecting pipe, for supplying a secondary air flow into the Roots blower for matching the air volume with the primary air flow, thereby completing primary noise reduction;

[0009] The top of the Roots blower is further provided with a second air outlet for passing the airflow after the primary noise reduction through a third connecting pipe into the exhaust muffler for secondary noise reduction; the exhaust muffler is mounted on one side of the Roots blower through a second supporting assembly, and one end of the top of the exhaust muffler is provided with a third air outlet for discharging the airflow after the secondary noise reduction through a fourth connecting pipe;

[0010] The detection component is installed in the first connecting pipe near the first air inlet; the controller is electrically connected to the signal output end of the detection component, and is used to output the side air supply control instruction generated according to the preset air volume adjustment rules and corresponding detection data to the human-computer interaction unit, so that the operator can adjust the air intake opening of the side air supply muffler.

[0011] Optionally, the detection component includes: a pressure sensor and a flow sensor, and the signal output ends of the pressure sensor and the flow sensor are both electrically connected to the controller, for outputting corresponding detection data to the controller;

[0012] The detection data includes: main airflow pressure data and main airflow flow data.

[0013] Optionally, the side air supply muffler includes: an outer cylinder, a first annular cylinder, a second annular cylinder and a side air supply regulating assembly;

[0014] The bottom of the outer cylinder is fixedly connected to the upper end surface of the first supporting assembly, and a shutter is provided on one side of the outer circumference of the outer cylinder for the secondary airflow to enter; the first annular cylinder is fixedly connected to the inner side of the outer cylinder, and a first opening is provided on the outer circumference of the first annular cylinder for the secondary airflow to enter; the second annular cylinder is fixedly connected to the inner side of the first annular cylinder, and a filter element is installed in the second annular cylinder to prevent dust and particulate matter from entering.

[0015] Optionally, the side air supply adjustment assembly includes: a connecting rod and a ring plate; a second opening that is compatible with the first opening is opened on the outer periphery of the ring plate, the outer surface of the ring plate is slidingly connected to the inner surface of the first ring tube, and the bottom of the outer tube is also provided with a sunken ring groove that is compatible with the ring plate; the two ends of the connecting rod are respectively fixedly connected to the top of the ring plate.

[0016] Optionally, the outer cylinder and the first annular cylinder are concentrically arranged, the first annular cylinder and the second annular cylinder are eccentrically arranged, and there is a gap space between the first annular cylinder and the second annular cylinder, and between the ring plate and the second annular cylinder.

[0017] Optionally, the side air supply muffler further includes a baffle, a clamping plate and a scale ruler;

[0018] The scale is arranged on the upper end surface of the bottom of the outer cylinder and is located in the gap area between the outer cylinder and the first ring cylinder; the baffle is arranged in the middle of the first opening in the vertical direction, and is used to limit the circumferential sliding of the baffle; one end of the middle part of the clamping plate is clamped with the upper part of the baffle, and the two sides of the clamping plate are also clamped with the first ring cylinder respectively to stabilize the baffle.

[0019] Optionally, the side air supply muffler further includes: a cover assembly and an inspection hatch;

[0020] The inspection hatch is arranged on the other side of the outer periphery of the outer cylinder; the cover plate assembly includes a first cover plate, a second cover plate and a third cover plate, and the first cover plate, the second cover plate and the third cover plate are respectively detachably connected to the top end surfaces of the outer cylinder, the first annular cylinder and the second annular cylinder.

[0021] Optionally, the first, second, third, and fourth connecting pipes are all made of rubber to reduce the extra noise generated by the pipes. This design not only ensures the stability of the connection but also avoids the extra noise generated by the pipes, significantly improving the noise reduction effect of the system.

[0022] Optionally, the silencer control system for the large-air-volume Roots blower further includes a heat dissipation cooling device, which is installed above the Roots blower; the second connecting pipe runs through the middle of the heat dissipation cooling device and is connected to the second air inlet at the top of the Roots blower.

[0023] Optionally, the transmission assembly includes a primary pulley, a secondary pulley, and a conveyor belt; the engine is mounted on a third support assembly, outputting power to the primary pulley via a power output assembly, which in turn transmits power to the secondary pulley via the conveyor belt, thereby driving the Roots blower to operate via a power input assembly. Optionally, a shock absorber is provided at the bottom of the Roots blower to reduce vibration of the Roots blower to prevent increased operating noise due to operational vibration.

[0024] Optionally, a tensioning assembly is further installed on the third support assembly, and the tensioning assembly includes: a tensioning wheel, a tensioning seat, a first connecting plate and a second connecting plate;

[0025] A plurality of first adjustment holes are provided on the first connecting plate in the vertical direction, one end of the tensioning seat is connected to the tensioning wheel, and the other end is connected to any of the first adjustment holes through a bolt; a plurality of second adjustment holes are provided on the second connecting plate in the horizontal direction, and the first connecting plate is connected to any of the second adjustment holes through a bolt; the lower end of the tensioning wheel is slidably connected to the conveyor belt.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention realizes double noise reduction of airflow by integrating exhaust silencer and side air supply silencer. The addition of side air supply silencer can not only effectively prevent the entry of dust and particulate matter, but also realizes flexible adjustment of air supply volume through the gap space and sliding connection between the ring plate and the ring cylinder. The addition of scale ruler, baffle and card plate also makes the adjustment more precise and stable. Secondly, the present invention can monitor the data of main airflow in real time by equipping detection components and controllers, and generate side air supply control instructions according to preset air volume adjustment rules, and then allow operators to adjust the air intake opening of side air supply silencer through human-computer interaction unit, thereby effectively realizing intelligent control. In addition, the present invention also adds a heat dissipation cooling device, which increases the flow area and heat dissipation area through the cooling side pipe composed of multiple thin tubes, and can quickly cool the hot air flow generated by the fan to ensure stable operation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a front view of an embodiment of a noise reduction control system for a large air volume Roots blower according to the present invention;

[0029] Figure 2 Shown is a side view of an embodiment of a noise reduction control system for a large air volume Roots blower according to the present invention;

[0030] Figure 3 The figure shows an isometric structural diagram of the side air supply silencer in the silencer control system for a large air volume Roots blower of the present invention;

[0031] Figure 4 The figure shows a front view of the side air supply silencer in the silencer control system for a large air volume Roots blower of the present invention;

[0032] Figure 5 Shown Figure 4 The cross-sectional view corresponding to the BB direction;

[0033] Figure 6 The figure shows the structure of the exhaust muffler in the muffler control system for the large air volume Roots blower of the present invention;

[0034] Figure 7 The figure shows the overall structure of the silencer control system for a large air volume Roots blower of the present invention;

[0035] In the figure: 1-Roots blower; 2-power output assembly; 3-exhaust silencer; 4-side air supply silencer; 5-first connecting pipe; 6-first supporting assembly; 7-second connecting pipe; 8-third connecting pipe; 9-second supporting assembly; 10-fourth connecting pipe; 11-outer cylinder; 12-first annular cylinder; 13-second annular cylinder; 14-louver; 15-connecting rod; 16-annular plate; 17-baffle; 18-clamping plate; 19-scale ruler; 20-heat dissipation cooling device; 21-main pulley; 22-slave pulley; 23-conveyor belt; 24-third supporting assembly; 25-shock absorber; 26-tensioning pulley; 27-tensioning seat; 28-first connecting plate; 29-second connecting plate; 30-porous tube; 31-honeycomb composite sound-absorbing material; 32-resonance cavity; 33-sound insulation material; 34-inspection hatch; 35-filter element. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0037] The term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " generally indicates an "or" relationship between the related objects.

[0038] Example 1

[0039] This embodiment introduces a muffler control system for a large air volume Roots blower, which includes: an engine, a Roots blower 1, a transmission assembly, an exhaust muffler 3, a side air supply muffler 4, a detection assembly, and a controller; the engine outputs power through a power output assembly 2, and drives the Roots blower 1 to operate through the transmission assembly;

[0040] The bottom of the Roots blower 1 is provided with a first air inlet for supplying a primary air flow into the Roots blower 1 through a first connecting pipe 5; the side air supply muffler 4 is mounted above the Roots blower 1 through a first supporting assembly 6, and the bottom of the side air supply muffler 4 is provided with a first air outlet, and the first air outlet is connected to the second air inlet at the top of the Roots blower 1 through a second connecting pipe 7, for supplying a secondary air flow into the Roots blower 1 to match the air volume with the primary air flow, thereby completing primary noise reduction;

[0041] The Roots blower 1 is further provided with a second air outlet on the top thereof, for passing the airflow after the primary noise reduction through a third connecting pipe 8 into the exhaust muffler 3 for secondary noise reduction; the exhaust muffler 3 is mounted on one side of the Roots blower 1 through a second supporting assembly 9, and a third air outlet is provided at one end of the top thereof, for discharging the airflow after the secondary noise reduction through a fourth connecting pipe 10;

[0042] The detection component is installed in the first connecting pipe 5 near the first air inlet; the controller is electrically connected to the signal output end of the detection component, and is used to output the side air supply control instruction generated according to the preset air volume adjustment rules and the corresponding detection data to the human-computer interaction unit, so that the operator can adjust the air intake opening of the side air supply muffler 4.

[0043] In a specific application of this embodiment, first, the main airflow enters through the first air inlet at the bottom of the Roots blower 1. A detection component is installed in the first connecting pipe 5 near the first air inlet. This component is responsible for real-time monitoring of key parameters such as the flow rate and pressure of the main airflow. Next, the detection component transmits the main airflow-related data monitored in real time to the controller through the signal output terminal. After receiving this data, the controller processes and analyzes the data according to the preset air volume adjustment rules. Then, based on the air volume adjustment rules and the analysis results of the main airflow data, the controller intelligently generates a side air supply control instruction, which includes the specific value or range of the air intake opening of the side air supply muffler 4 that needs to be adjusted.

[0044] Furthermore, the controller outputs the generated side air supply control instructions to a human-machine interface unit (such as a touch screen, display, etc.). The operator then views the relevant instructions through the human-machine interface unit and manually adjusts the relevant components of the side air supply muffler 4 as needed, thereby changing the air intake opening. Specifically, as the air intake opening of the side air supply muffler 4 is adjusted, the secondary airflow enters the second air inlet at the top of the Roots blower 1 through the second connecting pipe 7. The secondary airflow and the primary airflow are then matched within the Roots blower 1, achieving primary noise reduction through the initial noise reduction effect of the side air supply muffler 4. The airflow, which has undergone primary noise reduction, is then discharged from the second air outlet at the top of the Roots blower 1 and enters the exhaust muffler 3 through the third connecting pipe 8. At this point, the exhaust muffler 3 performs a secondary noise reduction on the airflow to ensure that the noise of the final exhaust airflow is minimized.

[0045] Example 2

[0046] Based on Example 1, this example will introduce in detail the relevant structural components and the silencer implementation process of the silencer control system for a large air volume Roots blower, as described below.

[0047] like Figure 1 、 Figure 2 and Figure 7 As shown, the silencer control system for a large air volume Roots blower provided in this embodiment includes: an engine, a Roots blower 1, a transmission component, an exhaust silencer 3, a side air supply silencer 4, a detection component, a controller and a heat dissipation cooling device 20.

[0048] Specifically, the engine is connected to the Roots blower 1 via a belt drive, driving the Roots pump blower 1. When the Roots blower 1 is in operation, negative pressure is created within the suction tank or housing. Simultaneously, a high-speed airflow is generated near the suction port, carrying material into the suction tank or housing. This can suction liquid or non-liquid materials such as slurry, solids, and dust. A shock absorber 25 is provided at the bottom of the Roots blower 1 to reduce vibrations caused by the operation of the blower 1 and prevent noise generated by the blower 1 from being increased.

[0049] The transmission assembly includes a primary pulley 21, a secondary pulley 22, and a conveyor belt 23. The engine is mounted on a third support assembly 24 and outputs power to the primary pulley 21 via the power take-off assembly 2. The primary pulley 21 then transmits power to the secondary pulley 22 via the conveyor belt, which in turn drives the Roots blower 1 through the power input assembly. The power take-off assembly 2 utilizes pneumatic and hydraulic control to enable instantaneous engagement and disengagement of power. When transmitting high torque, the belt drive may slip, protecting the engine.

[0050] Furthermore, a tensioning assembly is mounted on the third support assembly 24. The tensioning assembly comprises a tensioning pulley 26, a tensioning seat 27, a first connecting plate 28, and a second connecting plate 29. The first connecting plate 28 is vertically provided with a plurality of first adjustment holes. One end of the tensioning seat 27 is connected to the tensioning pulley 26, and the other end is bolted to any of the first adjustment holes. The second connecting plate 29 is horizontally provided with a plurality of second adjustment holes. The first connecting plate 28 is bolted to any of the second adjustment holes. The lower end of the tensioning pulley 26 is slidably connected to the conveyor belt 23. In actual operation, the tensioning pulley 26 will adjust the connection positions of the relevant components between the first and second adjustment holes based on the actual connection conditions between the tensioning pulley 26 and the conveyor belt 23, thereby achieving adaptive matching in both the vertical and horizontal directions.

[0051] like Figure 6 As shown, the exhaust muffler 3 in this embodiment is a horizontal cylindrical muffler, comprising a porous tube 30, a honeycomb composite sound-absorbing material 31, and a resonance cavity 32. In actual use, due to the principle of acoustic interference, sound waves passing through the exhaust muffler 3 interfere with reflected waves, canceling each other out and reducing energy. The sound-absorbing material reduces noise through absorption or reflection.

[0052] like Figures 3 to 5As shown, the side air supply muffler 4 includes: an outer cylinder 11, a first annular cylinder 12, a second annular cylinder 13, a side air supply adjustment component, a ring plate 16, a baffle 17, a clamping plate 18, a scale 19, a cover assembly, an inspection hatch 34 and sound insulation material 33.

[0053] The bottom of the outer cylinder 11 is fixedly connected to the upper end surface of the first support assembly 6 by a plurality of bolts, and a louver 14 is also provided on the outer circumference of the outer cylinder 11 for the entry of secondary airflow. The louver 14 can avoid the noise generated by high-speed airflow by increasing the flow area and reducing the air inlet velocity.

[0054] The first annular tube 12 is fixedly connected to the inner side of the outer tube 11, and a first opening is provided on the outer periphery of the first annular tube 12 for allowing the secondary airflow to enter; the second annular tube 13 is fixedly connected to the inner side of the first annular tube 12, and a filter element 35 is installed in the second annular tube 12 to prevent dust and particulate matter from entering.

[0055] The side air supply adjustment component includes: a connecting rod 15 and a ring plate 16; a second opening that is compatible with the first opening is opened on the outer periphery of the ring plate 16. In other words, the overall outer contour of the first opening is the same as the overall outer contour of the second opening. When the two are aligned, the maximum amount of secondary airflow can be achieved.

[0056] The outer surface of the ring plate 16 is slidably connected to the inner surface of the first annular tube 12, and the bottom of the outer tube 11 is also provided with a sunken annular groove adapted to the ring plate 16. In actual use, the operator can adjust the corresponding air intake volume by rotating the ring plate 16 within the sunken annular groove according to the relevant control instructions displayed by the human-computer interface unit. The two ends of the connecting rod 15 are respectively fixedly connected to the top of the ring plate 16. The design of the connecting rod 15 facilitates the operator to slide the connected ring plate 16 conveniently, making it highly practical.

[0057] The outer cylinder 11 is concentrically arranged with the first annular cylinder 12, the first annular cylinder 12 is eccentrically arranged with the second annular cylinder 13, and the second annular cylinder 13 is concentrically arranged with the first air outlet provided at the bottom of the side air supply muffler 4. The overall eccentric arrangement of the second annular cylinder 12 facilitates rapid air intake and adjustment.

[0058] In addition, there are gaps between the first annular tube 12 and the second annular tube 13, as well as between the annular plate 16 and the second annular tube 13. The sound insulation material 33 is disposed between the first annular tube 12 and the second annular tube 13 to absorb and filter noise generated by the airflow. In this embodiment, the sound insulation material 33 is specifically made of ePTFE membrane composite sound-absorbing cotton.

[0059] The scale 19 is provided on the upper end surface of the bottom of the outer cylinder 11 and is located in the gap area between the outer cylinder 11 and the first annular cylinder 12. In actual application, the operator can accurately control the air intake according to the specific values ​​on the scale 19.

[0060] The baffle 17 is vertically disposed in the middle of the first opening to limit the circumferential sliding of the baffle 17. The baffle design ensures that, under non-ideal conditions, at least a certain amount of secondary airflow enters the side air supply muffler 4 to achieve subsequent air supply and supply balance.

[0061] One end of the middle portion of the clamping plate 18 is clamped with the upper portion of the baffle 17 , and both sides of the clamping plate 18 are also clamped with the first ring tube 12 respectively, so as to stabilize the baffle 17 .

[0062] The inspection hatch 34 is provided on the other side of the outer periphery of the outer cylinder 11; the cover plate assembly includes a first cover plate, a second cover plate, and a third cover plate, which are detachably connected to the top surfaces of the outer cylinder 11, the first annular cylinder 12, and the second annular cylinder 13, respectively. The design of the inspection hatch 34 and the detachable cover plate assembly facilitates daily cleaning and replacement of the sound insulation material 33 to prevent damage to the Roots blower 1 due to the entry of dust or particulate matter. The layered design of the cover plates further ensures that the intake air can be maximized through the sound insulation material and filter element along a preset route to achieve noise reduction.

[0063] The detection component includes: a pressure sensor and a flow sensor, and the signal output ends of the pressure sensor and the flow sensor are both electrically connected to the controller, for outputting corresponding main airflow pressure data and main airflow flow data to the controller.

[0064] The cooling and heat dissipation device 20 includes a cooling air side pipe, a heat sink, a T-shaped pipe, and a connecting hose. The heat dissipation and condensation device 20 utilizes a cooling air side pipe composed of multiple thin tubes to increase the flow and heat dissipation area, rapidly cooling the hot air flow generated by the blower, thereby ensuring stable operation of the Roots blower 1.

[0065] Furthermore, the connecting pipes connect the inlet and outlet air of the Roots blower 1, the exhaust muffler 3, and the side-supply air muffler 4. The matching of the pipes directly affects the flow rate of the airflow. A pipe diameter that is too small will greatly increase the operating resistance and reduce the blower's operating efficiency. A pipe diameter that is too large will cause material waste and also affect the installation space. Therefore, the first connecting pipe 5, the second connecting pipe 7, the third connecting pipe 8, and the fourth connecting pipe 10 used in this embodiment are all rubber components, designed to reduce the additional noise generated by the pipes.

[0066] In summary, the silencer system provided in this embodiment optimizes system matching and employs an adjustable side-supply air silencer 4. This adjusts the flow area according to the air volume and pressure during operation of the Roots blower 1, ensuring that the air supply volume matches the operating conditions, optimizing the muffler frequency and muffler area, and achieving effective noise reduction while ensuring heat dissipation from the Roots blower 1. This design not only improves the stability and reliability of the system but also reduces operating costs, thus offering broad application prospects.

[0067] In the description of the present invention / application, it should be understood that the terms "center," "up," "down," "front," "back," "left," "right," "inside," "outside," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are used only to explain the relative positional relationships and movement of components in a particular posture. If the particular posture changes, the directional indications will also change accordingly. These terms are used solely to facilitate the description of the present invention / application and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention / application.

[0068] In the description of the present invention / this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention / this application can be understood based on specific circumstances. In addition, in the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A silencing control system for a large air volume Roots blower, comprising: An engine, a Roots blower (1) and a transmission assembly, wherein the engine outputs power through a power output assembly (2) and drives the Roots blower (1) to operate via the transmission assembly, and is characterized in that it also includes: an exhaust muffler (3), a side air supply muffler (4), a detection assembly and a controller; The bottom of the Roots blower (1) is provided with a first air inlet for supplying a primary air flow into the Roots blower (1) through a first connecting pipe (5); the side air supply muffler (4) is mounted above the Roots blower (1) through a first supporting assembly (6); the bottom of the side air supply muffler (4) is provided with a first air outlet, and the first air outlet is connected to the second air inlet at the top of the Roots blower (1) through a second connecting pipe (7), for supplying a secondary air flow into the Roots blower (1) to match the air volume with the primary air flow, thereby completing a primary noise reduction; The top of the Roots blower (1) is also provided with a second air outlet for passing the airflow after the primary noise reduction through the third connecting pipe (8) into the exhaust muffler (3) for secondary noise reduction; the exhaust muffler (3) is mounted on one side of the Roots blower (1) through the second supporting assembly (9); a third air outlet is provided at one end of the top of the exhaust muffler (3) for discharging the airflow after the secondary noise reduction through the fourth connecting pipe (10); The detection component is installed in the first connecting pipe (5) near the first air inlet; the controller is electrically connected to the signal output end of the detection component, and is used to output the side air supply control instruction generated according to the preset air volume adjustment rule and the corresponding detection data to the human-computer interaction unit, so that the operator can adjust the air intake opening of the side air supply muffler (4).

2. The silencing control system for a large air volume Roots blower according to claim 1, characterized in that: The detection component includes: a pressure sensor and a flow sensor, the signal output ends of the pressure sensor and the flow sensor are both electrically connected to the controller, and are used to output corresponding detection data to the controller; The detection data includes: main airflow pressure data and main airflow flow data.

3. The silencing control system for a large air volume Roots blower according to claim 1 or 2, characterized in that: The side air supply muffler (4) comprises: an outer cylinder (11), a first annular cylinder (12), a second annular cylinder (13) and a side air supply regulating assembly; The bottom of the outer cylinder (11) is fixedly connected to the upper end surface of the first support assembly (6), and a shutter (14) is provided on one side of the outer periphery of the outer cylinder (11) for allowing the secondary airflow to enter; the first ring cylinder (12) is fixedly connected to the inner side of the outer cylinder (11), and a first opening is provided on the outer periphery of the first ring cylinder (12) for allowing the secondary airflow to enter; the second ring cylinder (13) is fixedly connected to the inner side of the first ring cylinder (12), and a filter element (35) is installed in the second ring cylinder (13) for preventing dust and particulate matter from entering; The side air supply regulating assembly comprises: a connecting rod (15) and a ring plate (16); a second opening adapted to the first opening is provided on the outer periphery of the ring plate (16); the outer surface of the ring plate (16) is slidably connected to the inner surface of the first ring cylinder (12), and a sunken ring groove adapted to the ring plate (16) is further provided on the bottom of the outer cylinder (11); and both ends of the connecting rod (15) are fixedly connected to the top of the ring plate (16).

4. The silencing control system for a large air volume Roots blower according to claim 3, characterized in that: The outer cylinder (11) and the first annular cylinder (12) are concentrically arranged, the first annular cylinder (12) and the second annular cylinder (13) are eccentrically arranged, and there is a gap space between the first annular cylinder (12) and the second annular cylinder (13), and between the ring plate (16) and the second annular cylinder (13).

5. The silencing control system for a large air volume Roots blower according to claim 4, characterized in that: The side air supply muffler (4) further includes a baffle (17), a clamping plate (18) and a scale ruler (19); The scale (19) is provided on the upper end surface of the bottom of the outer cylinder (11) and is located in the gap area between the outer cylinder (11) and the first ring cylinder (12); the baffle (17) is provided in the middle of the first opening in the vertical direction, and is used to limit the sliding of the baffle (17) in the circumferential direction; one end of the middle part of the clamping plate (18) is clamped with the upper part of the baffle (17), and both sides of the clamping plate (18) are also clamped with the first ring cylinder (12) respectively, and are used to stabilize the baffle (17).

6. The silencing control system for a large air volume Roots blower according to claim 5, characterized in that: The side air supply muffler (4) further comprises: a cover plate assembly and an inspection hatch (34); The inspection hatch (34) is provided on the other side of the outer periphery of the outer cylinder (11); the cover plate assembly comprises a first cover plate, a second cover plate and a third cover plate, and the first cover plate, the second cover plate and the third cover plate are detachably connected to the top end surfaces of the outer cylinder (11), the first annular cylinder (12) and the second annular cylinder (13), respectively.

7. The silencing control system for a large air volume Roots blower according to claim 1, characterized in that: The first connecting pipeline (5), the second connecting pipeline (7), the third connecting pipeline (8) and the fourth connecting pipeline (10) are all made of rubber parts, which are used to reduce the additional noise generated by the pipelines.

8. The silencing control system for a large air volume Roots blower according to claim 1 or 6, characterized in that: It also includes a heat dissipation cooling device (20), which is installed above the Roots blower (1); the second connecting pipe (7) passes through the middle of the heat dissipation cooling device (20) and is connected to the second air inlet at the top of the Roots blower (1).

9. The silencing control system for a large air volume Roots blower according to claim 1, characterized in that: The transmission assembly includes a main pulley (21), a secondary pulley (22) and a conveyor belt (23); the engine is mounted on a third support assembly (24), and outputs power to the main pulley (21) through a power output assembly (2); the main pulley (21) transmits power to the secondary pulley (22) through the conveyor belt (23), and then drives the Roots blower (1) to operate through the power input assembly; A shock absorber (25) is further provided at the bottom of the Roots blower (1) for reducing vibration of the Roots blower (1).

10. The noise reduction control system for a large air volume Roots blower according to claim 9, characterized in that: A tensioning assembly is also installed on the third support assembly (24), and the tensioning assembly includes: a tensioning wheel (26), a tensioning seat (27), a first connecting plate (28) and a second connecting plate (29); The first connecting plate (28) is provided with a plurality of first adjustment holes in the vertical direction, one end of the tensioning seat (27) is connected to the tensioning wheel (26), and the other end is connected to any of the first adjustment holes through a bolt; the second connecting plate (29) is provided with a plurality of second adjustment holes in the horizontal direction, and the first connecting plate (28) is connected to any of the second adjustment holes through a bolt; the lower end of the tensioning wheel (26) is slidably connected to the conveyor belt (23).

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