Silencing control system for large-air-volume Roots blower

Abstract

The invention discloses a noise reduction control system for a large-air-volume Roots blower, and belongs to the technical field of blower noise reduction. The system comprises an engine, a Roots blower, a transmission assembly, an exhaust and side air supply silencer, a detection assembly and a controller. When the system operates, a main air inlet in the bottom of the Roots blower receives main airflow, a side air supply air inlet in the top of the Roots blower receives secondary airflow through a side air supply silencer, the main air inlet and the side air supply air inlet are matched in the Roots blower, and preliminary noise reduction is achieved. And the air flow after noise reduction is discharged from the air outlet in the top of the fan, enters the exhaust silencer for secondary noise reduction, and is finally discharged from the air outlet of the exhaust silencer. The detection assembly is installed in the pipeline in front of the main air inlet and used for monitoring the air volume. The controller receives the detection data, generates a side air supply control instruction according to a preset rule, and enables an operator to adjust the air inlet opening degree of the side air supply silencer through the man-machine interaction unit. Through fine air volume matching and double noise reduction design, the working efficiency and the noise reduction effect of the Roots blower are effectively improved.

Description

Technical Field

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

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

[0003] In response to the noise problem of Roots blowers, silencing measures usually include air supply silencing and exhaust silencing. The specific form of the silencing system and the design style of the silencer have a direct impact on the overall silencing effect of the Roots blower. At present, most Roots blowers on the market focus on the research and application of exhaust silencing, while relatively less attention is paid to side air supply silencing. In terms of air supply silencing, the existing air supply silencer styles are often similar to exhaust silencers, but it is worth noting that there are significant differences in the working principles of exhaust silencing and air supply silencing. If the two are treated equally, the effect of air supply silencing will be seriously weakened. In addition, the inhaled air needs to be filtered during the air supply silencing process to prevent foreign matter from being inhaled and causing damage to 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 silencing and exhaust silencing, as well as factors such as filtering and matching, it is urgent to provide a new and effective silencing system for large air 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 Roots blower with large air volume, 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 silencing control system for a large air volume Roots blower, which comprises: an engine, a Roots blower, a transmission component, an exhaust silencer, a side air supply silencer, 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; The bottom of the Roots blower is provided with a first air inlet for supplying the main airflow into the Roots blower through the first connecting pipeline; the side air supply muffler is installed above the Roots blower through the first supporting assembly, and the bottom of the side air supply muffler is provided with a first air outlet, and the first air outlet is connected to the second air inlet on the top of the Roots blower through the second connecting pipeline, so as to supply the secondary airflow into the Roots blower to match the air volume with the main airflow, thereby completing the primary noise reduction; The top of the Roots blower is also provided with a second air outlet, which is used to allow the airflow after the primary noise reduction to enter the exhaust muffler through the third connecting pipeline for secondary noise reduction; the exhaust muffler is installed on one side of the Roots blower through the second supporting assembly, and one end of the top of the exhaust muffler is provided with a third air outlet, which is used to discharge the airflow after the secondary noise reduction through the fourth connecting pipeline; The detection component is installed in the first connecting pipeline 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.

[0008] 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; Wherein, the detection data includes: main airflow pressure data and main airflow flow data.

[0009] Optionally, the side air supply muffler comprises: an outer cylinder, a first annular cylinder, a second annular cylinder and a side air supply regulating assembly; 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 allowing a 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 allowing a 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.

[0010] Optionally, the side air supply adjustment assembly includes: a connecting rod and a ring plate; a second opening matching 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 a sunken ring groove matching the ring plate is also opened on the bottom of the outer tube; the two ends of the connecting rod are respectively fixedly connected to the top of the ring plate.

[0011] Optionally, the outer cylinder is concentrically arranged with the first annular cylinder, 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 annular plate and the second annular cylinder.

[0012] Optionally, the side air supply muffler further includes a baffle, a clamping plate and a scale ruler; The scale ruler is arranged on the upper end surface of the bottom of the outer tube and is located in the gap area between the outer tube and the first ring tube; 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 tube respectively, which is used to stabilize the baffle.

[0013] Optionally, the side air supply muffler further includes: a cover plate assembly and an inspection hatch; 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 detachably connected to the top end surfaces of the outer cylinder, the first annular cylinder and the second annular cylinder respectively.

[0014] Optionally, the first connecting pipeline, the second connecting pipeline, the third connecting pipeline and the fourth connecting pipeline are all made of rubber parts to reduce the additional noise generated by the pipeline. This design not only ensures the stability of the connection, but also avoids the additional noise generated by the pipeline, so that the noise reduction effect of the system is significantly improved.

[0015] Optionally, the silencer control system for the large-air-volume Roots blower further includes a heat dissipation cooling device 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.

[0016] Optionally, the transmission assembly includes a main pulley, a secondary pulley and a conveyor belt; the engine is mounted on the third support assembly, and outputs power to the main pulley through a power output assembly, and the main pulley transmits power to the secondary pulley through the conveyor belt, and then drives the Roots blower to operate through a power input assembly. Optionally, a shock absorber is also provided at the bottom of the Roots blower, which is used to reduce the vibration of the Roots blower to avoid increasing the operating noise of the blower due to operating vibration.

[0017] Optionally, a tensioning assembly is further installed on the third supporting assembly, and the tensioning assembly includes: a tensioning wheel, a tensioning seat, a first connecting plate and a second connecting plate; The first connecting plate is provided with a plurality of first adjustment holes 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 bolts; the second connecting plate is provided with a plurality of second adjustment holes in the horizontal direction, and the first connecting plate is connected to any of the second adjustment holes through bolts; the lower end of the tensioning wheel is slidably connected to the conveyor belt.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 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 provide the operator with the human-computer interaction unit to adjust the air intake opening of the side air supply silencer, 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 a cooling side pipe composed of multiple thin tubes, and can quickly cool down the hot air flow generated by the fan to ensure the stable operation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The front view of an embodiment of a silencing control system for a large air volume Roots blower of the present invention is shown; Figure 2 The figure shows a side view of an embodiment of a silencing control system for a large air volume Roots blower of the present invention; Figure 3 The figure shows an isometric structural schematic diagram of a side air supply silencer in a silencer control system for a large air volume Roots blower of the present invention; 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; Figure 5 Shown Figure 4 The cross-sectional view corresponding to the BB direction; Figure 6 The figure shows the structure schematic diagram of the exhaust silencer in the silencer control system for the large air volume Roots blower of the present invention; Figure 7 The figure shows the overall structure schematic diagram of the silencing control system for a large air volume Roots blower of the present invention; In the figure: 1-Roots blower; 2-power output assembly; 3-exhaust silencer; 4-side air supply silencer; 5-first connecting pipeline; 6-first supporting assembly; 7-second connecting pipeline; 8-third connecting pipeline; 9-second supporting assembly; 10-fourth connecting pipeline; 11-outer cylinder; 12-first annular cylinder; 13-second annular cylinder; 14-louver; 15-connecting rod; 16-annular plate; 17-baffle; 18-card; 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 wheel; 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

[0020] 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. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0021] The term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the associated objects are in an "or" relationship.

[0022] Example 1 This embodiment introduces a muffler control system for a large air volume Roots blower, which includes: an engine, a Roots blower 1, a transmission component, an exhaust muffler 3, a side air supply muffler 4, a detection component and a controller; the engine outputs power through a power output assembly 2, and drives the Roots blower 1 to operate through the transmission component; The bottom of the Roots blower 1 is provided with a first air inlet for supplying the main airflow into the Roots blower 1 through the first connecting pipe 5; the side air supply muffler 4 is installed above the Roots blower 1 through the 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 the second connecting pipe 7, so as to supply the secondary airflow into the Roots blower 1 to match the air volume with the main airflow, thereby completing the primary noise reduction; The top of the Roots blower 1 is also provided with a second air outlet, which is used to pass 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 installed on one side of the Roots blower 1 through the second supporting assembly 9, and a third air outlet is provided at one end of the top of the exhaust muffler 3, which is used to discharge the airflow after the secondary noise reduction through the fourth connecting pipe 10; The detection component is installed in the first connecting pipeline 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.

[0023] In the specific application of this embodiment, first, the main airflow enters through the first air inlet at the bottom of the Roots blower 1, and a detection component is installed in the first connecting pipeline 5 near the first air inlet, which is responsible for real-time monitoring of key parameters such as the flow rate and pressure of the main airflow. Then, the detection component transmits the main airflow related data monitored in real time to the controller through the signal output terminal. After receiving these data, the controller will process and analyze the data according to the preset air volume adjustment rules. Then, according to the air volume adjustment rules and the analysis results of the main airflow data, the controller will intelligently generate 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.

[0024] Furthermore, the controller outputs the generated side air supply control instruction to the human-computer interaction unit (such as a touch screen, display screen, etc.). Then, the operator will view the relevant instructions through the human-computer interaction unit, and manually adjust the relevant components of the side air supply muffler 4 as needed, so as to change 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, and the secondary airflow and the main airflow will match the air volume in the Roots blower 1, and the primary noise reduction is completed through the preliminary noise reduction effect of the side air supply muffler 4. Then, the airflow after the primary noise reduction is 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 time, the exhaust muffler 3 performs a secondary noise reduction process on the airflow to ensure that the noise of the final discharged airflow can be reduced to the greatest extent.

[0025] Example 2 Based on Example 1, this example will introduce in detail the relevant structural composition and silencing implementation process of the silencing control system for a large air volume Roots blower, as described below.

[0026] like Figure 1 , Figure 2 and Figure 7As 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.

[0027] Specifically, the engine is connected to the Roots blower 1 through a belt drive to drive the Roots pump blower 1 to operate. After the Roots blower 1 operates, negative pressure is formed in the suction tank or box, and a high-speed airflow is formed near the suction port to bring the material into the suction tank or box, and liquid or non-liquid materials such as mud, solids, and dust can be sucked. A shock absorber 25 is provided at the bottom of the Roots blower 1 to reduce the vibration of the Roots blower 1 to avoid increasing the noise generated by the Roots blower 1 due to the operating vibration.

[0028] The transmission assembly includes a main pulley 21, a secondary pulley 22 and a conveyor belt 23. The engine is mounted on the third support assembly 24, and outputs power to the main pulley 21 through the power output assembly 2. The main pulley 21 transmits power to the secondary pulley 22 through the conveyor belt, and then drives the Roots blower 1 to operate through the power input assembly. The power output assembly 2 can achieve power engagement and disconnection at any time through gas-liquid control. When transmitting a large torque, the belt drive will slip, which plays a role in protecting the engine.

[0029] In addition, 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 by bolts; 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 by bolts; the lower end of the tensioning wheel 26 is slidably connected to the conveyor belt 23. In actual application, the tensioning wheel 26 will adjust the connection position of the relevant components in the first adjustment hole and the second adjustment hole according to the actual connection condition between the tensioning wheel 26 and the conveyor belt 23, so as to achieve adaptive matching in the up, down, left and right directions.

[0030] like Figure 6 As shown, the exhaust silencer 3 in this embodiment is a horizontal cylindrical silencer, which includes: a porous tube 30, a honeycomb composite sound-absorbing material 31 and a resonance cavity 32. In actual application, through the principle of sound wave interference, the sound wave will interfere with the reflected wave when passing through the exhaust silencer 3, and the two will cancel each other out, reducing energy, and the sound-absorbing material reduces noise through absorption or reflection.

[0031] 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 plate assembly, an inspection hatch 34 and a sound insulation material 33.

[0032] 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 shutter 14 is also provided on the outer circumference of the outer cylinder 11 for secondary airflow to enter. The shutter 14 can avoid noise caused by high-speed airflow by increasing the flow area and reducing the air inlet velocity.

[0033] The first annular tube 12 is fixedly connected to the inner side of the outer tube 11, and a first opening for the secondary airflow to enter is also provided on the outer periphery of the first annular tube 12; 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.

[0034] The side air supply adjustment component includes: a connecting rod 15 and a ring plate 16; a second opening adapted to 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 air volume of the secondary airflow can be achieved.

[0035] The outer surface of the ring plate 16 is slidably connected to the inner surface of the first ring tube 12, and the bottom of the outer tube 11 is also provided with a sinking ring groove adapted to the ring plate 16. In actual application, the operator can adjust the corresponding air intake volume by rotating the ring plate 16 in the sinking ring groove according to the relevant control instructions displayed by the human-machine interaction 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 is convenient for the operator to slide the connected ring plate 16 conveniently, and is highly practical.

[0036] The outer cylinder 11 is arranged concentrically with the first annular cylinder 12, the first annular cylinder 12 is arranged eccentrically with the second annular cylinder 13, and the second annular cylinder 13 is arranged concentrically 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 is conducive to the rapid entry and adjustment of air volume.

[0037] In addition, there are gaps between the first annular tube 12 and the second annular tube 13, and 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, and is used to absorb and filter the noise generated by the airflow, wherein the sound insulation material 33 in this embodiment is specifically selected from ePTFE membrane composite sound-absorbing cotton.

[0038] The scale 19 is disposed 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.

[0039] The baffle 17 is vertically arranged in the middle of the first opening to limit the circumferential sliding of the baffle 17. The design of the baffle can ensure 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 balance.

[0040] 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 .

[0041] The inspection hatch 34 is arranged 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, and the first cover plate, the second cover plate and the third cover plate 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 is convenient for daily cleaning and replacement of the sound insulation material 33 to avoid damage to the Roots blower 1 due to the entry of dust or particles. Among them, the layered design of the cover plate further ensures that the intake air can be maximized through the sound insulation material and the filter element according to the preset route for noise treatment.

[0042] 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 to output corresponding main airflow pressure data and main airflow flow data to the controller.

[0043] The cooling and heat dissipation device 20 includes: a cooling air side pipe, a heat dissipation plate, a T-shaped pipe and a connecting hose. The heat dissipation and condensation device 20 increases the flow area and the heat dissipation area through the cooling side pipe composed of a plurality of thin tubes, and can quickly cool down the hot air flow generated by the fan, thereby ensuring the stable operation of the Roots blower 1.

[0044] In addition, the connecting pipeline is a connector that connects the inlet and outlet of the Roots blower 1, the exhaust silencer 3, and the side air supply silencer 4. The matching of the pipeline directly affects the flow rate of the airflow. If the diameter of the pipeline is too small, the running resistance will be greatly increased, and the operating efficiency of the blower will be reduced. If the diameter of the pipeline is too large, it will cause material waste and affect the installation space. Therefore, the first connecting pipeline 5, the second connecting pipeline 7, the third connecting pipeline 8, and the fourth connecting pipeline 10 used in this embodiment are all rubber parts, which are intended to reduce the additional noise generated by the pipeline.

[0045] In summary, the silencing system provided in this embodiment optimizes system matching and adopts an adjustable side air supply muffler 4, adjusts the flow area according to the air volume and air pressure when the Roots blower 1 is in operation, ensures that the air supply volume matches the working conditions, and achieves the best effect of the muffler frequency and the muffler area, thereby achieving the purpose of effective noise reduction while ensuring the heat dissipation of the Roots blower 1. The above design not only improves the stability and reliability of the system, but also reduces the operating cost, and has a wide range of application prospects.

[0046] In the description of the present invention / application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present invention / application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention / application.

[0047] 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 the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention / this application can be understood through specific circumstances. In addition, in the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0048] 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 through the transmission assembly, and is characterized in that it also includes: an exhaust silencer (3), a side air supply silencer (4), a detection assembly and a controller; The Roots blower (1) is provided with a first air inlet at the bottom thereof, for allowing a primary airflow to enter the Roots blower (1) through a first connecting pipe (5); the side air supply muffler (4) is installed above the Roots blower (1) through a first supporting assembly (6); a first air outlet is provided at the bottom thereof, and the first air outlet is connected to a second air inlet at the top of the Roots blower (1) through a second connecting pipe (7), for allowing a secondary airflow to enter the Roots blower (1) to match the air volume with the primary airflow, thereby completing a primary noise reduction; The top of the Roots blower (1) is also provided with a second air outlet, which is used to allow the airflow after the primary noise reduction to enter the exhaust muffler (3) through the third connecting pipeline (8) for secondary noise reduction; the exhaust muffler (3) is installed on one side of the Roots blower (1) through the second supporting assembly (9); the top end of the exhaust muffler (3) is provided with a third air outlet, which is used to discharge the airflow after the secondary noise reduction through the fourth connecting pipeline (10); The detection component is installed in the first connecting pipeline (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-machine 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; Wherein, 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 silencer (4) comprises: an outer cylinder (11), a first annular cylinder (12), a second annular cylinder (13) and a side air supply regulating component; 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 circumference of the outer cylinder (11) for allowing a secondary airflow to enter; the first annular cylinder (12) is fixedly connected to the inner side of the outer cylinder (11), and a first opening is provided on the outer circumference of the first annular cylinder (12) for allowing a secondary airflow to enter; the second annular cylinder (13) is fixedly connected to the inner side of the first annular cylinder (12), and a filter element (35) for preventing dust and particulate matter from entering is installed in the second annular cylinder (13); The side air supply regulating assembly comprises: a connecting rod (15) and a ring plate (16); the outer circumference of the ring plate (16) is provided with a second opening matched with the first opening; the outer surface of the ring plate (16) is slidably connected to the inner surface of the first ring cylinder (12); and the bottom of the outer cylinder (11) is further provided with a sunken ring groove matched with the ring plate (16); and the two ends of the connecting rod (15) are respectively 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 arranged concentrically, the first annular cylinder (12) and the second annular cylinder (13) are arranged eccentrically, and there is a gap space between the first annular cylinder (12) and the second annular cylinder (13), and between the annular 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 comprises a baffle (17), a clamping plate (18) and a scale ruler (19); The scale ruler (19) is arranged 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 plate (17) is arranged in the middle of the first opening in the vertical direction and is used to limit the sliding position of the baffle plate (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 plate (17), and the two sides of the clamping plate (18) are also clamped with the first ring cylinder (12) respectively, so as to stabilize the baffle plate (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 arranged 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 respectively detachably connected to the top end surfaces of the outer cylinder (11), the first annular cylinder (12) and the second annular cylinder (13).

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) installed above the Roots blower (1); the second connecting pipeline (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 comprises 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 (23) through the conveyor belt (23), and then drives the Roots blower (1) to operate through a power input assembly; A shock absorber (25) is also provided at the bottom of the Roots blower (1) for reducing vibration of the Roots blower (1).

10. The silencing control system for a large air volume Roots blower according to claim 9, characterized in that: A tensioning assembly is also mounted on the third support assembly (24), the tensioning assembly comprising: 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 via bolts; the second connecting plate (28) is provided with a plurality of second adjustment holes in the horizontal direction; the first connecting plate (28) is connected to any of the second adjustment holes via bolts; and the lower end of the tensioning wheel (26) is slidably connected to the conveyor belt (23).

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