A Roots pump vacuum unit damping device and damping method

Abstract

The application provides a Roots rod pump vacuum unit damping device and a damping method, and belongs to the technical field of vacuum pumps.It solves the technical problems of single damping dimension, insufficient composite vibration suppression, poor adaptability to large impact or high-frequency micro-vibration of the existing Roots rod pump vacuum unit damping device.A Roots rod pump vacuum unit damping device comprises a fixing base, a buffer plate fixedly installed on the surface of the fixing base, an installation plate inserted through the periphery and fixed inside the fixing base, and a Roots vacuum pump fixedly installed on the surface of the installation plate.A fixed tooth ring is fixedly installed on the surface of the fixing base.In the application, the vertical energy of the vibration of the Roots vacuum pump can be transmitted to the wedge-shaped bottom block through the installation plate and finally converted into rotary kinetic energy to achieve preliminary dissipation, and the horizontal vibration is absorbed by the independent damping spring and the horizontal damping unit under the action of the horizontal damping assembly.

Description

Technical Field

[0001] This invention belongs to the field of vacuum pump technology, and relates to a vibration damping device for a Roots pump vacuum unit, particularly a vibration damping device and method for a Roots pump vacuum unit. Background Technology

[0002] Roots screw vacuum pumps are a commonly used type of vacuum pump in industry. They combine the characteristics of Roots and screw vacuum pumps. A Roots screw pump mainly consists of a fixed external tank and an internal rotating screw. The screw's rotation draws gas in from the inlet and compresses it before discharging it from the outlet. During operation, the high-speed rotation of the rotor and the periodic pumping generate inherent mechanical vibrations and airflow pulsations. These vibrations are transmitted to the unit's base and connected pipelines, leading to equipment fatigue, increased noise, loose connections, and even affecting the stability of downstream processes.

[0003] A search revealed a Roots screw vacuum pump disclosed in Chinese patent literature [Application No.: CN202410931537.3; Publication No.: CN118881686A]. This vacuum pump includes a pump body and a shock-absorbing device. The shock-absorbing device includes a mounting plate, a damping plate, a damping ring, and a damping piston. The pump body is connected to the surface of the mounting plate. The surface of the damping plate has a buffer cavity for sliding of the mounting plate. The outer ring of the damping ring is connected to the inner wall of the buffer cavity. The damping ring surrounds the mounting plate, and the inner ring of the damping ring can abut against the outer periphery of the mounting plate to form a limit. The damping piston is connected to the surface of the mounting plate facing the buffer cavity. The inner wall of the buffer cavity has a sealed flow channel for sliding of the buffer piston, and the sealed flow channel communicates with the inner cavity of the damping ring.

[0004] Although the vacuum pump disclosed in this patent can reduce vibration by using a combination structure of a damping ring and a damping piston, the vibration reduction performance of the vacuum pump is limited by the response speed of fluid damping and the fatigue life of the ring. Furthermore, it has limited adaptability to high-frequency vibration and large-amplitude impact. Moreover, the suppression of horizontal vibration mainly relies on the lateral stiffness of the ring, lacking active and efficient directional energy dissipation, making it difficult to cope with the multi-directional composite vibration generated during the operation of the Roots pump vacuum unit. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a vibration reduction device and method for a Roots pump vacuum unit. The technical problem to be solved by this invention is: how to efficiently suppress the multi-dimensional, wide-bandwidth composite vibration generated during the operation of the Roots pump vacuum unit.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A vibration damping device for a Roots pump vacuum unit includes a fixed base, a buffer plate fixedly installed on the surface of the fixed base, a mounting plate inserted through the fixed base on all four sides, and a Roots vacuum pump fixedly installed on the surface of the mounting plate. A fixed toothed ring is fixedly installed on the surface of the fixed base, and the buffer plate has a slot inside that can accommodate the fixed toothed ring. Multiple multi-directional vibration damping components are meshed on the outer wall of the fixed toothed ring, and the multi-directional vibration damping components are located between the buffer plate and the mounting plate.

[0008] The multi-directional damping component includes a wedge-shaped base block, which is fixedly installed at the bottom end of the mounting plate. A guide plate is obliquely attached to the bottom end of the wedge-shaped base block, and a wedge-shaped column is fixedly installed at the bottom end of the guide plate. The wedge-shaped column is slidably installed on the surface of the buffer plate. A connecting plate is rotatably connected to one side of the wedge-shaped column, and a gear disk is rotatably installed at the other end of the connecting plate. The gear disk is rotatably connected to the surface of the buffer plate and meshes with the outer wall of the fixed gear ring.

[0009] The fixed gear ring is provided with a buffer unit, which includes a gear column and is rotatably connected inside the fixed gear ring. A first toothed plate is meshed with one outer wall of the gear column. The first toothed plate is slidably connected inside the fixed gear ring. The top end of the first toothed plate is fixedly connected to the bottom end of the mounting plate. A second buffer spring is fixedly installed at the bottom end of the first toothed plate. A fixed seat is fixedly connected to the bottom end of the second buffer spring.

[0010] The outer wall of the gear column is also meshed with a second toothed plate, and the second toothed plate is slidably connected inside the fixed toothed ring. A first buffer spring is fixedly installed at the top of the second toothed plate, and a mounting plate is fixedly installed at the top of the first buffer spring.

[0011] The surface of the buffer plate is also equipped with horizontal shock-absorbing components.

[0012] With the above structure, when the Roots vacuum pump generates vertical vibration during operation, the mounting plate drives the wedge-shaped block at its bottom to move up and down. The wedge-shaped block then drives the guide plate it is in contact with through its inclined surface, efficiently converting the vertical linear motion into radial sliding of the wedge column along the surface of the buffer plate. The wedge column then drives the gear disc to rotate around the fixed gear ring through the connecting plate. Through this setting, the rotational kinetic energy dissipated by gear meshing friction and rotational inertia is dissipated, achieving initial and efficient vibration attenuation and providing a stable input for subsequent buffering.

[0013] The plurality of gear disks are equidistantly meshed in annular shape on the outer wall of the fixed gear ring, and the center of the fixed gear ring coincides with the axis of the buffer plate.

[0014] The surface of the buffer plate is fixedly equipped with a slide rail that can accommodate the sliding of the wedge-shaped column, and multiple slide rails are arranged radially at equal intervals around the outer periphery of the fixed toothed ring.

[0015] The above structure achieves uniform distribution and precise guidance of damping force. Multiple gear discs are evenly arranged circumferentially along the fixed gear ring, ensuring that vibration components from different directions of the mounting plate can be effectively captured and converted into rotational motion. This avoids local overload or response hysteresis caused by single-point force. Furthermore, the radially arranged annular equidistant slide rails provide a precise and low-resistance sliding path for each wedge column, ensuring the smooth and synchronous conversion of vertical vibration to radial sliding. This allows multiple multi-directional damping components to work in concert, sharing and dissipating vibration energy, greatly improving the reliability and balance of the entire damping system.

[0016] The mounting plate is fixedly installed with insert rods on all four sides of its bottom edge, and a base plate is fixedly installed at the bottom of the insert rods. The base plate is located at the bottom of the fixing seat.

[0017] A first telescopic spring is fixedly connected to the surface of the base plate, and the first telescopic spring is sleeved on the outer wall of the insertion rod, and the top end of the first telescopic spring is fixedly connected to the bottom end of the buffer plate.

[0018] With the above structure, the insertion rod passes through the fixed seat and the buffer plate. The bottom plate at its bottom end works together with the first telescopic spring sleeved on the insertion rod to provide a downward elastic constraint and an upward restoring force for the mounting plate and buffer plate assembly. Through this setting, on the one hand, it can effectively limit the excessive vertical displacement or accidental dislodgement of the mounting plate that may occur during severe vibration, playing a safety limiting role. On the other hand, the elastic support of the first telescopic spring can share part of the static load and provide additional buffering during dynamic processes, complementing the multi-directional damping components, enhancing the device's ability to cope with large amplitude impacts, and ensuring the long-term stability and safety of the unit's operation.

[0019] The fixed base and the buffer plate are all provided with through holes around the insertion rod.

[0020] The base is fixedly installed at the bottom of the fixed seat, and the base is arranged in a "well" shape.

[0021] With the above structure, the through holes on the fixed base and buffer plate corresponding to the insertion rods ensure that the insertion rods can pass through freely without interference, guaranteeing the normal operation of the insertion rods. It also facilitates the assembly and maintenance of the device. The "well"-shaped base frame is fixed to the bottom of the fixed base and has extremely high bending and torsional stiffness, providing an extremely stable installation foundation for the entire vibration damping device. It can effectively resist various complex stresses from the ground or the unit itself, prevent foundation deformation, and ensure that the reference position of the multi-directional vibration damping components remains accurate and unchanged.

[0022] The outer wall of the second toothed plate is fixedly equipped with a slider, and the inner wall of the fixed toothed ring is provided with a slide rail that can accommodate the slider to slide.

[0023] A mounting column is fixedly installed on the surface of the fixed base, and a second buffer spring is sleeved on the outer wall of the mounting column.

[0024] With the above structure, the cooperation between the slider and the inner wall slide of the fixed gear ring provides precise guidance and limit for the vertical linear movement of the second gear plate, preventing it from swaying or jamming during movement, and ensuring the stability of meshing with the gear column. This allows vibration energy to be transmitted efficiently and controllably between the gear rack mechanism and the spring. At the same time, the mounting column is fixed to the fixed seat, and the second buffer spring is sleeved on it. One end of the spring acts on the bottom end of the first gear plate, and the other end acts on the fixed seat, providing direct and stable elastic support and buffering force for the first gear plate.

[0025] The horizontal damping component includes a fixed column, which is fixedly connected to the bottom end of the mounting plate. A damping spring is sleeved on the outer wall of the fixed column, and the bottom end of the damping spring is fixedly connected to the surface of the buffer plate. A positioning block is fixedly connected to the surface of the buffer plate, and the positioning block is arranged corresponding to the damping spring. A transverse damping unit is provided on both sides of the positioning block.

[0026] With the above structure, the fixed column moves with the mounting plate, and its external damping spring directly bears the horizontal compressive or tensile force. It quickly absorbs and stores vibration energy through its own elastic deformation. The positioning block is fixed to the surface of the buffer plate and located on both sides of the damping spring. It serves as the mounting base and force support of the transverse damping unit, and directs the horizontal vibration directly from the mounting plate to the damping spring. This achieves separation from the vertical damping channel and can more effectively buffer the horizontal force caused by the transverse sway or airflow pulsation generated during the operation of the Roots pump.

[0027] The transverse damping unit includes a second telescopic spring, which is fixedly installed on the outer wall of the positioning block. A connecting block is fixedly installed on the other end of the second telescopic spring, and a rotating plate is rotatably connected to the outer side of the connecting block. A fixed bottom block is rotatably installed above the rotating plate and is fixedly connected to the bottom end of the mounting plate.

[0028] The surface of the buffer plate is provided with a groove that allows the connecting block to slide.

[0029] With the above structure, when the mounting plate undergoes horizontal displacement, the fixed base block pushes the rotating plate, which in turn drives the connecting block to slide within the groove, thereby stretching or compressing the second telescopic spring. The groove provides precise guidance for the movement of the connecting block. Through this setup, horizontal linear motion is first converted into the elastic deformation of the second telescopic spring. At the same time, the pivoting motion of the rotating plate introduces frictional damping, further consuming energy. Compared to pure spring buffering, it can provide better damping characteristics and adaptability to non-axial forces, more effectively suppressing horizontal reciprocating oscillations and instantaneous impacts, allowing the mounting plate to return to a stable position more quickly.

[0030] A vibration reduction method for a Roots pump vacuum unit vibration reduction device includes the following steps:

[0031] S1. Initial Vibration Dissipation: When the main vertical vibration generated by the Roots vacuum pump is transmitted to the mounting plate, the mounting plate will move up and down accordingly. By fixing a wedge-shaped block at the bottom of the mounting plate, the displacement is directly applied to the wedge-shaped block. The inclined surface of the wedge-shaped block is in contact with the guide plate. The inclined surface is used to efficiently convert the vertical linear motion into radial sliding of the guide plate and the wedge-shaped column fixed thereto along the slide rail on the surface of the buffer plate. The wedge-shaped column is hinged to the gear disk through the connecting plate, so that the radial sliding of the wedge-shaped column can drive the connecting plate, which drives the gear disk to rotate around the outer teeth of the fixed gear ring. This converts the violent vertical impact vibration into the rotational kinetic energy of the gear disk. The rotational motion achieves the initial dissipation of vibration energy through the friction at the gear meshing point and the rotational inertia of the gear disk itself, and sets up the first mechanical barrier for vibration.

[0032] S2. Secondary Gear Absorption: The vertical vibration of the mounting plate is processed by the multi-directional damping component and simultaneously transmitted to the buffer unit located inside the fixed gear ring. The vibration forces the first and second gear plates to move linearly along the slide rails on the inner wall of the fixed gear ring. As the first and second gear plates mesh with the two sides of the gear column respectively, the first gear plate compresses the second buffer spring at the bottom when it moves downward. At the same time, under the meshing action of the gear column, the second gear plate compresses the first buffer spring at the top when it moves upward synchronously. This makes the movements of the two gear plates interconnected and mutually restrictive, forming a secondary buffer effect with excellent internal balance and damping characteristics, which significantly absorbs and attenuates the energy of low and medium frequency vibrations.

[0033] S3. Suppressing horizontal vibration: When the Roots vacuum pump generates horizontal vibration or oscillation, the mounting plate undergoes horizontal displacement, and the fixed column moves with the mounting plate, compressing or stretching the damping spring sleeved on its outside. At the same time, the fixed bottom block at the bottom of the mounting plate pushes the rotating plate. One end of the rotating plate is rotatably connected to the fixed bottom block, and the other end is connected to the second telescopic spring through the connecting block. This causes the rotating plate to drive the connecting block to slide in the groove of the buffer plate, stretching or compressing the second telescopic spring, thereby converting the horizontal kinetic energy into the elastic potential energy of the spring, further consuming energy. It can flexibly adapt to horizontal displacement in different directions and effectively suppress the lateral oscillation of the mounting plate.

[0034] S4. Anti-displacement support: By setting a plug at the bottom of the mounting plate, the plug and the base plate are provided with continuous elastic support through the first telescopic spring, thereby limiting the vertical displacement and tilt of the mounting plate during vibration and maintaining the overall stability of the unit. At the same time, in conjunction with the "well"-shaped base frame at the bottom of the fixed seat, a stable and unchanging reference platform is provided for all vibration reduction activities.

[0035] Compared with the prior art, the vibration damping device and method for the Roots pump vacuum unit of the present invention have the following advantages:

[0036] 1. In this invention, by setting up multi-directional damping components and buffer units, the vertical energy of the vibration generated by the Roots vacuum pump can be transferred to the wedge-shaped bottom block through the mounting plate, and finally converted into rotational kinetic energy and achieved initial dissipation. At the same time, under the action of the horizontal damping components, the horizontal vibration is absorbed by independent damping springs and transverse damping units. Through this setting, the complex multi-directional vibration generated by the Roots pump vacuum unit during operation is guided through multiple paths, converted in multiple forms, and dissipated in multiple stages, thereby reducing vibration energy. This overcomes the limitations of traditional damping devices, which often only provide unidirectional or simple composite damping, and significantly improves the overall vibration suppression effect under complex vibration conditions. It is especially suitable for equipment such as Roots pumps that have both mechanical vibration and airflow pulsation, effectively reducing the vibration energy transmitted to the foundation and pipeline.

[0037] 2. In this invention, under the action of the multi-directional damping component, the vertical linear vibration transmitted from the mounting plate is converted into precise radial sliding of the wedge column along the slide rail without delay by the setting of the wedge-shaped bottom block and the guide plate. Then, the gear disk is driven to rotate around the fixed gear ring by the connecting plate, thereby converting the impact kinetic energy that is difficult to dissipate directly into rotational kinetic energy that can be dissipated through the friction of the gear meshing surface and the inertia of the rotating parts. This achieves efficient initial attenuation of vibration energy. Moreover, the ring-shaped equidistant arrangement of multiple gear disks ensures that vibration components from different directions can be effectively captured and homogenized, avoiding stress concentration.

[0038] 3. In this invention, by setting up a buffer unit, the vibration of the mounting plate drives the first toothed plate and the second toothed plate to move in opposite directions or in opposite directions along the inner slide of the fixed toothed ring. This makes the movements of the two toothed plates mutually coupled and restrictive, which can not only effectively absorb the energy of low and medium frequency vibration, but also adapt to the impact of different amplitudes through the coordinated deformation of the spring, providing a smooth restoring force and significantly suppressing the peak value of vibration transmission.

[0039] 4. In this invention, by setting up the horizontal damping component, the fixed column and the damping spring form a direct axial buffer, which can quickly absorb horizontal kinetic energy. Moreover, the lateral damping unit converts the horizontal displacement into the elastic deformation of the second telescopic spring through the rotating plate, which can effectively suppress the lateral sway and torsional vibration of the mounting plate and ensure the stability of the unit under complex stress. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of a vibration damping device for a Roots pump vacuum unit according to the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of a vibration damping device for a Roots pump vacuum unit in this invention;

[0042] Figure 3 This is a side view of a shock absorption device for a Roots pump vacuum unit according to the present invention.

[0043] Figure 4 This is a side view cross-sectional structural schematic diagram of a vibration damping device for a Roots pump vacuum unit according to the present invention;

[0044] Figure 5 In this invention Figure 4 A magnified structural diagram at point A;

[0045] Figure 6 This is a three-dimensional exploded structural diagram of a shock absorption device for a Roots pump vacuum unit according to the present invention;

[0046] Figure 7 This is a side view exploded structural diagram of a shock absorption device for a Roots pump vacuum unit according to the present invention;

[0047] Figure 8 This is a bottom-view exploded structural diagram of a shock-absorbing device for a Roots pump vacuum unit according to the present invention;

[0048] Figure 9 This is a cross-sectional structural schematic diagram of a vibration damping device for a Roots pump vacuum unit according to the present invention;

[0049] Figure 10 This is a schematic diagram of the bottom structure of the fixing base in this invention;

[0050] Figure 11 This is a schematic diagram of the surface structure of the buffer plate in this invention.

[0051] In the diagram, 1. Fixed base; 2. Buffer plate; 3. Mounting plate; 4. Roots vacuum pump; 5. Fixed gear ring; 6. Gear column; 7. First gear plate; 8. Second gear plate; 9. First buffer spring; 10. Second buffer spring; 11. Mounting column; 12. Slider; 13. Insert rod; 14. Base plate; 15. First telescopic spring; 16. Fixed column; 17. Damping spring; 18. Positioning block; 19. Second telescopic spring; 20. Connecting block; 21. Rotating plate; 22. Fixed base block; 23. Slide groove; 24. Wedge-shaped base block; 25. Guide plate; 26. Wedge-shaped column; 27. Slide rail; 28. Connecting plate; 29. ​​Gear disk; 30. Base frame. Detailed Implementation

[0052] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0053] like Figures 1-11As shown, a vibration damping device for a Roots pump vacuum unit includes a fixed base 1, a buffer plate 2 fixedly installed on the surface of the fixed base 1, a mounting plate 3 inserted through the fixed base 1 on all four sides, a Roots vacuum pump 4 fixedly installed on the surface of the mounting plate 3, a fixed gear ring 5, a gear column 6, a first gear plate 7, a second gear plate 8, a first buffer spring 9, a second buffer spring 10, a mounting column 11, a slider 12, an insert rod 13, a base plate 14, a first telescopic spring 15, a fixed column 16, a damping spring 17, a positioning block 18, a second telescopic spring 19, a connecting block 20, a rotating plate 21, a fixed base block 22, a sliding groove 23, and a wedge-shaped bottom. Block 24, guide plate 25, wedge column 26, slide rail 27, connecting plate 28, gear disk 29, and base frame 30. A fixing gear ring 5 is fixedly installed on the surface of the fixing seat 1. A slot for accommodating the fixing gear ring 5 is opened inside the buffer plate 2. Multiple multi-directional damping components are meshed with the outer wall of the fixing gear ring 5, and these components are located between the buffer plate 2 and the mounting plate 3. Insert rods 13 are fixedly installed at the bottom edges of all four sides of the mounting plate 3, and a base plate 14 is fixedly installed at the bottom end of each insert rod 13. The base plate 14 is located at the bottom of the fixing seat 1, and a first telescopic spring 15 is fixedly connected to the surface of the base plate 14. The first telescopic spring 15 is sleeved on... The outer wall of the insertion rod 13 and the top end of the first telescopic spring 15 are fixedly connected to the bottom end of the buffer plate 2. This arrangement effectively limits the excessive vertical displacement or accidental dislodgement of the mounting plate 3 during severe vibrations, providing a safety limit. Furthermore, the elastic support of the first telescopic spring 15 can share some of the static load and provide additional buffering during dynamic processes, complementing the multi-directional damping components and enhancing the device's ability to withstand large-amplitude impacts. This ensures the long-term stability and safety of the unit's operation. The fixed base 1 and the buffer plate 2 both have through holes corresponding to the insertion rod 13 around their perimeter. The through holes on the fixed seat 1 and the buffer plate 2 corresponding to the insertion rod 13 ensure that the insertion rod 13 can pass through freely without interference, ensuring the normal operation of the insertion rod 13, and also facilitating the assembly and maintenance of the device. At the same time, a base frame 30 is fixedly installed at the bottom of the fixed seat 1, and the base frame 30 is set in a "well" shape. The "well" shaped base frame 30 is fixed to the bottom of the fixed seat 1 and has extremely high bending and torsional stiffness, which can provide an extremely stable installation foundation for the entire shock absorption device. It can effectively resist various complex stresses from the ground or the unit itself, prevent foundation deformation, and ensure that the reference position of the multi-directional shock absorption component remains accurate and unchanged.

[0054] The multi-directional damping assembly includes a wedge-shaped base block 24, which is fixedly installed at the bottom end of the mounting plate 3. A guide plate 25 is obliquely attached to the bottom end of the wedge-shaped base block 24, and a wedge-shaped post 26 is fixedly installed at the bottom end of the guide plate 25. The wedge-shaped post 26 is slidably installed on the surface of the buffer plate 2. A slide rail 27, capable of accommodating the sliding of the wedge-shaped post 26, is fixedly installed on the surface of the buffer plate 2. Multiple slide rails 27 are arranged radially and equidistantly around the outer periphery of the fixed toothed ring 5, and are rotatably connected to one side of the wedge-shaped post 26. A connecting plate 28 is connected, and a gear disk 29 is rotatably mounted on the other end of the connecting plate 28. The gear disk 29 is rotatably connected to the surface of the buffer plate 2, and the gear disk 29 is meshed with the outer wall of the fixed gear ring 5. When the Roots vacuum pump 4 operates and generates vertical vibration, the mounting plate 3 drives the wedge-shaped bottom block 24 at its bottom end to move up and down. Thus, the wedge-shaped bottom block 24 drives the guide plate 25 that is in contact with it through its inclined surface, efficiently converting the vertical linear motion into the radial sliding of the wedge-shaped column 26 along the surface of the buffer plate 2. The wedge-shaped column 26 then drives the gear disk 29 to rotate around the fixed gear ring 5 through the connecting plate 28. Through this arrangement, the rotational kinetic energy dissipated by gear meshing friction and rotational inertia is dissipated, achieving initial and efficient vibration attenuation and providing a stable input for subsequent buffering. Specifically, multiple gear disks 29 are equidistantly meshed in annular on the outer wall of the fixed gear ring 5, and the center of the fixed gear ring 5 coincides with the axis of the buffer plate 2. The multiple gear disks 29 are evenly arranged around the circumference of the fixed gear ring 5, ensuring that vibration components from different directions of the mounting plate 3 can be effectively captured and converted into rotational motion, avoiding local overload or response hysteresis caused by single-point force. Moreover, the radially arranged annular equidistant slide rails 27 provide a precise and low-resistance sliding path for each wedge-shaped column 26, ensuring the smooth and synchronous conversion of vertical vibration to radial sliding, enabling multiple multi-directional damping components to work in concert, share and dissipate vibration energy, and greatly improve the reliability and balance of the entire damping system.

[0055] The fixed gear ring 5 is equipped with a buffer unit, which includes a gear column 6. The gear column 6 is rotatably connected to the inside of the fixed gear ring 5. A first gear plate 7 is meshed with one side of the outer wall of the gear column 6. The first gear plate 7 is slidably connected to the inside of the fixed gear ring 5. The top end of the first gear plate 7 is fixedly connected to the bottom end of the mounting plate 3. A second buffer spring 10 is fixedly installed at the bottom end of the first gear plate 7. A fixed seat 1 is fixedly connected to the bottom end of the second buffer spring 10. A mounting post 11 is fixedly installed on the surface of the fixed seat 1. The second buffer spring 10 is sleeved on the outer wall of the mounting post 11. The mounting post 11 is fixed to the fixed seat 1. The second buffer spring 10 is sleeved on it. One end of the second buffer spring 10 acts on the bottom end of the first gear plate 7, and the other end acts on the fixed seat 1, providing direct and stable elastic support and buffering force for the first gear plate 7.

[0056] The outer wall of the gear column 6 is also meshed with a second toothed plate 8, and the second toothed plate 8 is slidably connected inside the fixed toothed ring 5. A slider 12 is fixedly installed on the outer wall of the second toothed plate 8, and a slide rail is opened on the inner wall of the fixed toothed ring 5 to accommodate the slider 12 sliding. A first buffer spring 9 is fixedly installed on the top of the second toothed plate 8, and a mounting plate 3 is fixedly installed on the top of the first buffer spring 9. The cooperation between the slider 12 and the slide rail on the inner wall of the fixed toothed ring 5 provides precise guidance and limit for the vertical linear movement of the second toothed plate 8, preventing it from swaying or jamming during movement, ensuring the stability of meshing with the gear column 6, so that vibration energy can be transmitted efficiently and controllably between the gear rack mechanism and the spring.

[0057] The surface of the buffer plate 2 is also equipped with a horizontal damping component. Specifically, the horizontal damping component includes a fixed column 16, which is fixedly connected to the bottom end of the mounting plate 3. A damping spring 17 is sleeved on the outer wall of the fixed column 16, and the bottom end of the damping spring 17 is fixedly connected to the surface of the buffer plate 2. A positioning block 18 is fixedly connected to the surface of the buffer plate 2, and the positioning block 18 is correspondingly set with respect to the damping spring 17. The fixed column 16 moves with the mounting plate 3, and the external damping spring 17 directly bears the horizontal compressive or tensile force. It quickly absorbs and stores vibration energy through its own elastic deformation. The positioning block 18 is fixed to the surface of the buffer plate 2 and located on both sides of the damping spring 17. It serves as the mounting base and force support of the transverse damping unit, and directs the horizontal vibration from the mounting plate 3 directly to the damping spring 17, realizing the separation from the vertical damping channel. It can more effectively buffer the horizontal force caused by the transverse sway or airflow pulsation generated during the operation of the Roots pump.

[0058] Furthermore, lateral damping units are provided on both sides of the positioning block 18. Each lateral damping unit includes a second telescopic spring 19, which is fixedly installed on the outer wall of the positioning block 18. A connecting block 20 is fixedly installed on the other end of the second telescopic spring 19. A rotating plate 21 is rotatably connected to the outer side of the connecting block 20. A fixed base block 22 is rotatably installed above the rotating plate 21 and is fixedly connected to the bottom end of the mounting plate 3. A groove 23 is provided on the surface of the buffer plate 2 to accommodate the sliding of the connecting block 20. When the mounting plate 3 undergoes horizontal displacement, the fixed base block... 22 pushes the rotating plate 21, which drives the connecting block 20 to slide in the groove 23, thereby stretching or compressing the second telescopic spring 19. The groove 23 provides precise guidance for the movement of the connecting block 20. With this setting, the horizontal linear motion is first converted into the elastic deformation of the second telescopic spring 19. At the same time, the pivoting motion of the rotating plate 21 introduces frictional damping, further consuming energy. Compared with pure spring buffer, it can provide better damping characteristics and adaptability to non-axial forces, more effectively suppressing horizontal reciprocating sway and instantaneous impact, so that the mounting plate 3 can return to a stable position more quickly.

[0059] A vibration reduction method for a Roots pump vacuum unit vibration reduction device includes the following steps:

[0060] S1. Initial Vibration Dissipation: When the main vertical vibration generated by the operation of the Roots vacuum pump 4 is transmitted to the mounting plate 3, the mounting plate 3 will move up and down accordingly. By fixing the wedge-shaped bottom block 24 at the bottom end of the mounting plate 3, the displacement is directly applied to the wedge-shaped bottom block 24. The inclined surface of the wedge-shaped bottom block 24 is in contact with the guide plate 25. The inclined surface is used to efficiently convert the vertical linear motion into the radial sliding of the guide plate 25 and the wedge-shaped column 26 fixed thereto along the slide rail 27 on the surface of the buffer plate 2. The wedge-shaped column 26 is hinged to the gear disk 29 through the connecting plate 28. The radial sliding of the wedge-shaped column 26 can drive the connecting plate 28, which drives the gear disk 29 to rotate around the outer teeth of the fixed gear ring 5. Thus, the violent vertical impact vibration is converted into the rotational kinetic energy of the gear disk 29. The rotational motion achieves the initial dissipation of vibration energy through the friction at the gear meshing and the rotational inertia of the gear disk 29 itself, and sets up the first mechanical barrier for vibration.

[0061] S2. Secondary absorption by gears: The vertical vibration of the mounting plate 3 is processed by the multi-directional damping component and simultaneously transmitted to the buffer unit located inside the fixed gear ring 5. The vibration forces the first gear plate 7 and the second gear plate 8 to move linearly along the slide of the inner wall of the fixed gear ring 5. As the first gear plate 7 and the second gear plate 8 mesh with the two sides of the gear column 6 respectively, when the first gear plate 7 moves downward, it compresses the second buffer spring 10 at the bottom. At the same time, under the meshing action of the gear column 6, when the second gear plate 8 moves upward synchronously, it compresses the first buffer spring 9 at the top. The movements of the two gear plates are related and mutually restrictive, forming a secondary buffer effect with excellent internal balance and damping characteristics, which significantly absorbs and attenuates the energy of low and medium frequency vibrations.

[0062] S3. Suppressing horizontal vibration: When the Roots vacuum pump 4 generates horizontal vibration or oscillation, the mounting plate 3 undergoes horizontal displacement, and the fixed column 16 moves with the mounting plate 3, which compresses or stretches the damping spring 17 sleeved on its outside. At the same time, the fixed bottom block 22 at the bottom of the mounting plate 3 pushes the rotating plate 21. One end of the rotating plate 21 is rotatably connected to the fixed bottom block 22, and the other end is connected to the second telescopic spring 19 through the connecting block 20. This causes the rotating plate 21 to drive the connecting block 20 to slide in the slide groove 23 of the buffer plate 2, stretching or compressing the second telescopic spring 19, thereby converting the horizontal kinetic energy into the elastic potential energy of the spring, further consuming energy. It can flexibly adapt to horizontal displacement in different directions and effectively suppress the lateral oscillation of the mounting plate 3.

[0063] S4. Anti-displacement support: By setting the insertion rod 13 at the bottom of the mounting plate 3, the insertion rod 13 and the base plate 14 are provided with continuous elastic support through the first telescopic spring 15, thereby limiting the vertical displacement and tilt of the mounting plate 3 during vibration and maintaining the overall stability of the unit. At the same time, in conjunction with the "well"-shaped base frame 30 at the bottom of the fixed seat 1, a stable and unchanging reference platform is provided for all vibration reduction activities.

[0064] In summary, in this invention, by setting up multi-directional damping components and buffer units, the vertical energy of the vibration generated by the Roots vacuum pump 4 can be transferred to the wedge-shaped bottom block 24 through the mounting plate 3, and ultimately converted into rotational kinetic energy and achieved initial dissipation. At the same time, under the action of the horizontal damping components, the horizontal vibration is absorbed by the independent damping spring 17 and the transverse damping unit. Through this setting, the complex multi-directional vibration generated by the Roots pump vacuum unit during operation is guided through multiple paths, converted in multiple forms, and dissipated in multiple stages, thereby reducing vibration energy. This overcomes the limitations of traditional damping devices, which often only provide unidirectional or simple composite damping, and significantly improves the overall vibration suppression effect under complex vibration conditions. It is especially suitable for equipment such as Roots pumps that simultaneously exhibit mechanical vibration and airflow pulsation, effectively reducing the vibration energy transmitted to the foundation and pipelines. It solves the technical problems of existing Roots pump vacuum unit damping devices having a single damping dimension, insufficient suppression of composite vibration, and poor adaptability to large impacts or high-frequency micro-vibrations.

[0065] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A vibration damping device for a Roots pump vacuum unit, comprising a fixed base, a buffer plate fixedly mounted on the surface of the fixed base, a mounting plate inserted through the fixed base on all four sides, and a Roots vacuum pump fixedly mounted on the surface of the mounting plate, characterized in that, A fixing toothed ring is fixedly installed on the surface of the fixed base, and a slot is opened inside the buffer plate to accommodate the fixing toothed ring. Multiple multi-directional damping components are meshed on the outer wall of the fixing toothed ring, and the multi-directional damping components are located between the buffer plate and the mounting plate. The multi-directional damping component includes a wedge-shaped base block, which is fixedly installed at the bottom end of the mounting plate. A guide plate is obliquely attached to the bottom end of the wedge-shaped base block, and a wedge-shaped column is fixedly installed at the bottom end of the guide plate. The wedge-shaped column is slidably installed on the surface of the buffer plate. A connecting plate is rotatably connected to one side of the wedge-shaped column, and a gear disk is rotatably installed at the other end of the connecting plate. The gear disk is rotatably connected to the surface of the buffer plate and meshes with the outer wall of the fixed gear ring. The fixed gear ring is equipped with a buffer unit for secondary buffering and energy absorption of the vertical vibration of the mounting plate. The buffer unit includes a gear column, which is rotatably connected inside the fixed gear ring. A first toothed plate is meshed with one outer wall of the gear column. The first toothed plate is slidably connected inside the fixed gear ring. The top end of the first toothed plate is fixedly connected to the bottom end of the mounting plate. A second buffer spring is fixedly installed at the bottom end of the first toothed plate. A fixed seat is fixedly connected to the bottom end of the second buffer spring. The outer wall of the gear column is also meshed with a second toothed plate, and the second toothed plate is slidably connected inside the fixed toothed ring. A first buffer spring is fixedly installed at the top of the second toothed plate, and a mounting plate is fixedly installed at the top of the first buffer spring. The surface of the buffer plate is also equipped with a horizontal damping component for suppressing horizontal vibration of the mounting plate.

2. The vibration damping device for a Roots pump vacuum unit according to claim 1, characterized in that, Multiple gear discs are equidistantly meshed in annular shape on the outer wall of a fixed gear ring, and the center of the fixed gear ring coincides with the axis of the buffer plate. The surface of the buffer plate is fixedly equipped with a slide rail that can accommodate the sliding of the wedge-shaped column, and multiple slide rails are arranged radially at equal intervals around the outer periphery of the fixed toothed ring.

3. The vibration damping device for a Roots pump vacuum unit according to claim 1, characterized in that, The mounting plate is fixedly installed with insert rods on all four sides of its bottom edge, and a base plate is fixedly installed at the bottom of the insert rods. The base plate is located at the bottom of the fixing seat. A first telescopic spring is fixedly connected to the surface of the base plate, and the first telescopic spring is sleeved on the outer wall of the insertion rod, and the top end of the first telescopic spring is fixedly connected to the bottom end of the buffer plate.

4. The vibration damping device for a Roots pump vacuum unit according to claim 3, characterized in that, The fixed base and the buffer plate are all provided with through holes around the insertion rod. The base is fixedly installed at the bottom of the fixed seat, and the base is arranged in a "well" shape.

5. The vibration damping device for a Roots pump vacuum unit according to claim 1, characterized in that, The outer wall of the second toothed plate is fixedly equipped with a slider, and the inner wall of the fixed toothed ring is provided with a slide rail that can accommodate the slider to slide. A mounting column is fixedly installed on the surface of the fixed base, and a second buffer spring is sleeved on the outer wall of the mounting column.

6. The vibration damping device for a Roots pump vacuum unit according to claim 1, characterized in that, The horizontal damping component includes a fixed column, which is fixedly connected to the bottom end of the mounting plate. A damping spring is sleeved on the outer wall of the fixed column, and the bottom end of the damping spring is fixedly connected to the surface of the buffer plate. A positioning block is fixedly connected to the surface of the buffer plate, and the positioning block is arranged corresponding to the damping spring. A transverse damping unit is provided on both sides of the positioning block.

7. A vibration damping device for a Roots pump vacuum unit according to claim 6, characterized in that, The transverse damping unit includes a second telescopic spring, which is fixedly installed on the outer wall of the positioning block. A connecting block is fixedly installed on the other end of the second telescopic spring, and a rotating plate is rotatably connected to the outer side of the connecting block. A fixed bottom block is rotatably installed above the rotating plate and is fixedly connected to the bottom end of the mounting plate. The surface of the buffer plate is provided with a groove that allows the connecting block to slide.

Images