Single-rotation-direction eddy current buffering and damping device

Abstract

The invention provides a single-rotation-direction eddy current buffering and damping device which comprises an eddy current damping unit, a torque input shaft, a centrifugal pumping unit, a reverse driving energy consumption unit, an oil pumping channel and driving oil. Energy consumption magnetic steel of the eddy current damping unit is arranged in the centrifugal pumping unit and fixedly connected with the torque input shaft; the energy consumption magnetic steel is provided with a centrifugal blade for driving the oil liquid to generate centrifugal force; the reverse driving energy consumption unit comprises an oil liquid driving wheel, a conductor rotating shaft piece and a one-way driving part, the conductor rotating shaft piece is fixed to the oil liquid driving wheel and extends into the centrifugal pump feeding unit, and a conductor plate of the eddy current damping unit is arranged in the centrifugal pump feeding unit through the conductor rotating shaft piece; and the conductor plate rotates in the reverse direction of the energy consumption magnetic steel under the action of the one-way driving part. The damping device has the advantages of being good in buffering and damping consumption, adjustable in damping, compact in structure and the like.

Description

Technical Field

[0001] The present invention relates to the field of vibration control of rotating machinery, and particularly to a single-rotation-direction eddy current buffer and vibration damping device. Background Art

[0002] During the operation of rotating machinery, especially during startup, shutdown, or load changes, significant torsional vibrations, impacts, and harmful harmonic vibrations will occur in its transmission system or rotating shaft. These vibrations not only affect the operation accuracy, stability, and lifespan of mechanical equipment, but also cause noise pollution. For specific mechanical systems that only allow rotation in a single direction (such as certain types of wind turbines, pumps, compressors, or transmission mechanisms with overrunning clutches, etc.), the vibration control problem is particularly important.

[0003] Due to its advantages such as non-contact, frictionless, fast response, and long lifespan, eddy current damping technology has been widely applied in the field of vibration damping of rotating machinery in recent years. As a non-contact vibration damping device, the traditional eddy current damper forms a damping force by cutting the eddy current generated by the magnetic steel with a conductor plate, and has been applied in some fields. For unidirectional rotating machinery (such as turbines, compressor rotors, etc.), the damping provided by the traditional eddy current buffer and vibration damping device cannot meet the requirements, and it is usually the damping preset under fixed or design conditions. However, the actual operating speed range of unidirectional rotating machinery may be very wide. For example, when the speed increases, especially when approaching or passing through the critical speed, too low a damping coefficient is not sufficient to effectively suppress the rapidly increasing vibration amplitude, resulting in the inability to quickly dissipate energy and avoid the resonance risk; when the speed is low, too high a damping coefficient will unnecessarily consume energy and hinder the normal startup or low-speed operation of the system.

[0004] To solve the above problems, the existing damping devices usually rely on external complex control systems (such as solenoid valves, servo motors, etc.) or require additional sensor signal inputs (such as speed, vibration signals), which significantly increases the complexity, cost, and volume of the system structure, making it difficult to be efficiently integrated in the limited installation space of the rotating system. Moreover, the structure may face the problem of increased wear at high speeds. At the same time, it may also introduce additional fault points and reduce the overall reliability of the system. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a single-rotation-direction eddy current buffer and vibration damping device with good buffer and vibration damping performance, adjustable damping, and a compact structure.

[0006] To solve the above technical problems, the technical solution proposed by the present invention is as follows: A single-rotation-direction eddy current buffer and shock absorber device includes an eddy current damping unit, a torque input shaft connected to a rotating structure, and further includes a centrifugal oil pumping unit, a reverse driving energy-consuming unit, an oil liquid pumping channel connected between the centrifugal oil pumping unit and the reverse driving energy-consuming unit, and driving oil liquid in each unit and the oil liquid pumping channel. The energy-consuming magnetic steel of the eddy current damping unit is arranged in the centrifugal oil pumping unit and fixedly connected to the torque input shaft. The energy-consuming magnetic steel is provided with centrifugal blades for generating centrifugal force on the driving oil liquid. The reverse driving energy-consuming unit includes an oil liquid driving wheel, a conductor rotating shaft member, and a one-way driving part. The conductor rotating shaft member is fixed to the oil liquid driving wheel and extends into the centrifugal oil pumping unit. The conductor plate of the eddy current damping unit is arranged in the centrifugal oil pumping unit through the conductor rotating shaft member, and the conductor plate rotates in the reverse direction of the energy-consuming magnetic steel under the action of the one-way driving part.

[0007] As a further improvement of the above technical solution: The one-way driving part is a one-way clutch, and the one-way clutch is arranged on the conductor rotating shaft member and located between the oil liquid driving wheel and the conductor plate.

[0008] There are multiple centrifugal blades, and the centrifugal blades are arc-shaped blades arranged along the rotation direction of the torque input shaft. The multiple arc-shaped blades are evenly arranged along the circumference of the energy-consuming magnetic steel.

[0009] The energy-consuming magnetic steel is provided with centrifugal oil passing holes, and the centrifugal oil passing holes are multiple arc-shaped oil passing holes arranged along the rotation direction of the torque input shaft. The arc-shaped oil passing holes and the centrifugal blades are alternately arranged along the circumference of the energy-consuming magnetic steel.

[0010] The centrifugal oil pumping unit further includes a fixedly arranged eddy current housing. The torque input shaft extends into the eddy current housing and is fixedly connected to the energy-consuming magnetic steel through a mounting plate.

[0011] The end of the eddy current housing is provided with a first sealing ring for preventing oil leakage and a thrust bearing for ensuring the rotation of the torque input shaft and the conductor rotating shaft member. The first sealing ring is located outside the thrust bearing. The two ends of the eddy current housing are convexly provided with first mounting cavities, and the first sealing ring and the thrust bearing are arranged in the first mounting cavities.

[0012] The conductor rotating shaft member is a rotating shaft disk, and the disk body of the rotating shaft disk is located in the centrifugal oil pumping unit. The conductor plate is installed on the disk body through a conductor back plate.

[0013] The reverse driving energy-consuming unit further includes an oil pump housing. The one-way driving part is arranged in the oil pump housing or the eddy current housing of the centrifugal oil pumping unit. The conductor rotating shaft member is rotatably installed in the oil pump housing through a thrust bearing.

[0014] The oil-driven wheel is a driving gear or an impeller.

[0015] It further includes an oil cooling unit. The centrifugal pumping unit and the reverse driving energy-consuming unit are respectively communicated with the oil cooling unit through a cooling channel, and an on-off control valve is arranged in communication with the cooling unit.

[0016] Compared with the prior art, the advantages of the present invention are as follows: The present invention is provided with a centrifugal pumping unit, a reverse driving energy-consuming unit, an oil pumping channel and driving oil. The oil pumping channel is connected between the centrifugal pumping unit and the reverse driving energy-consuming unit. The driving oil is arranged in the centrifugal pumping unit, the reverse driving energy-consuming unit and the oil pumping channel. The reverse driving energy-consuming unit includes an oil-driven wheel, a conductor rotating shaft member and a one-way driving part. The conductor rotating shaft member is fixed to the oil-driven wheel and extends into the centrifugal pumping unit, and the conductor plate is arranged in the centrifugal pumping unit through the conductor rotating shaft member. Its structure is simple, the layout structure is compact, and the occupied space is small.

[0017] At the same time, the energy-consuming magnetic steel fixedly connected to the torque input shaft is provided with a centrifugal oil passing hole, which enables the oil in the centrifugal pumping unit to generate centrifugal force when the torque input shaft rotates. At this time, the oil enters the reverse driving energy-consuming unit through the oil pumping channel under the action of oil pressure, drives the oil-driven wheel and the conductor rotating shaft member to move, and rotates in the reverse direction of the energy-consuming magnetic steel under the action of the one-way driving part. At this time, the reverse rotation of the conductor plate and the energy-consuming magnetic steel will increase the relative rotation speed between the two, increasing two damping forces in the centrifugal pumping unit, namely the flow damping of the hydraulic oil itself and the further increase of the eddy current damping force between the conductor plate and the energy-consuming magnetic steel, so that the buffer and vibration damping device of the present invention has excellent buffer and vibration damping effects.

[0018] At the same time, the vibration damping device of the present invention can adjust the damping size according to the rotational speed of the rotating machinery, automatically realizing the switching between large rotational speed and large damping, and small rotational speed and small damping, so that the structure to be vibration-damped can quickly dissipate energy and effectively suppress the resonance risk when the rotational speed is high and the vibration amplitude increases sharply, and can reduce the damping when the rotational speed is small and the vibration requirement is low. When the rotational speed of the rotating machinery is faster, the rotational speed of the energy-consuming magnetic steel increases accordingly, and the generated centrifugal force increases, so that the amount and speed of the oil pumped into the reverse driving energy-consuming unit increase. At this time, it will drive the oil-driven wheel and the conductor rotating shaft member to move quickly, thereby further increasing the relative rotation speed between the conductor plate and the energy-consuming magnetic steel on the basis of the reverse rotation of the conductor plate, further improving the eddy current damping force, and thus realizing the large damping characteristic at high speed of the rotating machinery. When the rotational speed of the rotating machinery changes from large to small, the centrifugal force generated by the energy-consuming magnetic steel becomes smaller. Similarly, the eddy current damping force decreases correspondingly and the damping decreases.

[0019] It can be seen that through the ingenious structural layout, the present invention realizes the function of adaptively adjusting the damping according to the rotational speed on the basis of a small space and a simple structure, avoiding the problems of low damping adjustment efficiency and reliability and complex structure in the existing structure, ensuring the reliable and safe operation of the equipment while saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in more detail below based on embodiments and with reference to the drawings. Among them: Figure 1 is a three-dimensional structural schematic diagram of the single-rotation-direction eddy current buffer and shock absorber of the present invention; Figure 2 is a front view of the single-rotation-direction eddy current buffer and shock absorber of the present invention; Figure 3 is Figure 2 a cross-sectional view of the A-A section of Figure 4 is a top view of the single-rotation-direction eddy current buffer and shock absorber of the present invention; Figure 5 is Figure 4 a cross-sectional view of the B-B section of Figure 6 is Figure 4 a cross-sectional view of the C-C section of Figure 7 is a structural schematic diagram of the centrifugal oil through-hole of the energy-consuming permanent magnet of the present invention.

[0021] Each label in the figure represents: 1, eddy current damping unit; 11, energy-consuming permanent magnet; 111, centrifugal oil through-hole; 12, conductor plate; 13, conductor back plate; 14, centrifugal blade; 2, torque input shaft; 3, centrifugal pumping unit; 31, eddy current housing; 32, first sealing ring; 33, first installation cavity; 4, reverse drive energy-consuming unit; 41, oil-driven wheel; 42, conductor rotating shaft member; 43, one-way drive part; 44, oil pump housing; 45, second seal; 5, oil pumping channel; 6, thrust bearing; 7, oil cooling unit; 8, cooling channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described in detail below in conjunction with the drawings of the specification and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0023] As Figures 1 to 6As shown in the figure, the single-rotation-direction eddy current buffer and shock absorber of this embodiment includes an eddy current damping unit 1, a torque input shaft 2, a centrifugal oil pumping unit 3, a reverse drive energy-consuming unit 4, an oil pumping channel 5, and driving oil. Among them, the torque input shaft 2 is drivingly connected to the rotating structure, the centrifugal oil pumping unit 3 and the reverse drive energy-consuming unit 4 are arranged side by side, the oil pumping channel 5 is connected to the centrifugal oil pumping unit 3 and the reverse drive energy-consuming unit 4, and the driving oil is arranged in the centrifugal oil pumping unit 3, the reverse drive energy-consuming unit 4, and the oil pumping channel 5. In this embodiment, the energy-consuming magnetic steel 11 of the eddy current damping unit 1 is arranged in the centrifugal oil pumping unit 3, and the energy-consuming magnetic steel 11 is fixedly connected to the torque input shaft 2. The energy-consuming magnetic steel 11 is provided with centrifugal blades 14 to generate centrifugal force on the driving oil. The reverse drive energy-consuming unit 4 includes an oil driving wheel 41, a conductor rotating shaft member 42, and a one-way drive part 43. The conductor rotating shaft member 42 is fixed to the oil driving wheel 41 and the conductor rotating shaft member 42 extends into the centrifugal oil pumping unit 3. The conductor plate 12 of the eddy current damping unit 1 is arranged in the centrifugal oil pumping unit 3 through the conductor rotating shaft member 42. The conductor plate 12 rotates in the reverse direction of the energy-consuming magnetic steel 11 under the action of the one-way drive part 43. Its structure is simple, the layout structure is compact, and the occupied space is small.

[0024] At the same time, the energy-consuming magnetic steel 11 fixedly connected to the torque input shaft 2 is provided with centrifugal blades 14, which causes the oil in the centrifugal oil pumping unit 3 to generate centrifugal force when the torque input shaft 2 rotates. At this time, the oil enters the reverse drive energy-consuming unit 4 through the oil pumping channel 5 under the action of oil pressure, drives the oil driving wheel 41 and the conductor rotating shaft member 42 to move, and rotates in the reverse direction of the energy-consuming magnetic steel 11 under the action of the one-way drive part 43. At this time, the reverse rotation of the conductor plate 12 and the energy-consuming magnetic steel 11 will increase the relative rotational speed of the two, increasing two damping forces in the centrifugal oil pumping unit 3, that is, the flow damping of the hydraulic oil itself, and the further increase of the eddy current damping force between the conductor plate 12 and the energy-consuming magnetic steel 11, making the buffer and shock absorber of the present invention have excellent buffer and shock absorption effects.

[0025] Meanwhile, the damping device of the present invention can adjust the damping according to the rotational speed of the rotating machinery, automatically realizing the switching between large damping at high rotational speed and small damping at low rotational speed. This enables the structure to be damped to rapidly dissipate energy and effectively suppress the resonance risk when the rotational speed is high and the vibration amplitude increases sharply, and to reduce the damping when the rotational speed is low and the vibration requirement is low. When the rotational speed of the rotating machinery is faster, the rotational speed of the energy-consuming magnet 11 increases accordingly, and the centrifugal force generated increases. As a result, the amount and speed of the oil pumped into the reverse drive energy-consuming unit 4 increase. At this time, the oil-driven wheel 41 and the conductor rotating shaft member 42 will be driven to move rapidly, further increasing the relative rotational speed between the conductor plate 12 and the energy-consuming magnet 11 on the basis of the reverse rotation of the conductor plate 12, thereby further increasing the eddy current damping force and realizing the large damping characteristic at high speed of the rotating machinery. When the rotational speed of the rotating machinery changes from large to small, the centrifugal force generated by the energy-consuming magnet 11 becomes smaller. Similarly, the eddy current damping force decreases accordingly and the damping reduces.

[0026] It can be seen that, based on a small space and a simple structure, the present invention realizes the function of adaptively adjusting the damping according to the rotational speed through a clever structural layout, avoiding the problems of low damping adjustment efficiency, low reliability, and complex structure in the existing structure, ensuring the reliable and safe operation of the equipment while saving energy consumption.

[0027] Furthermore, the one-way drive part 43 is a one-way clutch. The one-way clutch is arranged on the conductor rotating shaft member 42 and is located between the oil-driven wheel 41 and the conductor plate 12. This ensures that while the conductor plate 12 rotates in the reverse direction with respect to the energy-consuming magnet 11, the structure is simple and the layout is compact. In this embodiment, the one-way clutch is arranged inside the eddy current housing 31. In other embodiments, the one-way clutch can also be arranged inside the oil pump housing 44.

[0028] In this embodiment, there are multiple centrifugal blades 14. The centrifugal blades 14 are arc-shaped blades arranged along the rotation direction of the torque input shaft 2, and the multiple arc-shaped blades are evenly arranged along the circumference of the energy-consuming magnet 11. This enables the driving oil to flow fully and evenly and generate a uniform and reliable centrifugal force when the energy-consuming magnet 11 rotates. Thereby further ensuring the effective and reliable pumping of the driving oil into the reverse drive energy-consuming unit 4.

[0029] Furthermore, the energy-consuming magnet 11 is provided with centrifugal oil holes 111. The centrifugal oil holes 111 are multiple arc-shaped oil holes arranged along the rotation direction of the torque input shaft 2 to facilitate oil passage and reduce flow resistance. At the same time, the arc-shaped oil holes and the centrifugal blades 14 are alternately arranged along the circumference of the energy-consuming magnet 11, with a compact layout and small occupied space.

[0030] In this embodiment, the centrifugal pumping unit 3 further includes a fixed eddy current housing 31, the torque input shaft 2 extends into the eddy current housing 31, and is fixedly connected to the energy-consuming magnetic steel 11 through a mounting plate. It has a compact layout, occupies a small space, and has high operating reliability.

[0031] In this embodiment, the end of the eddy current housing 31 is provided with a first sealing ring 32 and a thrust bearing 6. The first sealing ring 32 is located outside the thrust bearing 6; the thrust bearing 6 is provided on the torque input shaft 2 and the conductor shaft 42 to ensure that the torque input shaft 2 and the conductor shaft 42 can rotate reliably. The two ends of the eddy current housing 31 are provided with a first mounting cavity 33, and the first sealing ring 32 and the thrust bearing 6 are provided in the first mounting cavity 33. While preventing oil leakage and ensuring the safe operation of the device, it has a compact layout and occupies a small space.

[0032] Furthermore, the conductor shaft member 42 is a shaft disk, the body of the shaft disk is located in the centrifugal pumping unit 3, and the conductor plate 12 is installed on the disk body through the conductor back plate 13. This ensures that the conductor plate 12 is installed reliably and effectively. At the same time, the conductor back plate 13 is made of a high magnetic permeability material, which can effectively guide and concentrate the magnetic flux, reduce the magnetic resistance and leakage of the magnetic circuit, and the conductor back plate 13, the energy-consuming magnetic steel 11 and the conductor plate 12 together form a closed magnetic circuit, thereby optimizing the magnetic field distribution and enhancing the magnetic flux density in the conductor plate 12 area, that is, the conductor back plate 13 enhances the magnetic flux density by improving the concentration of the magnetic flux and reducing the magnetic resistance of the magnetic circuit. The increase in magnetic flux density makes the generation of eddy current more significant, thereby greatly enhancing the energy dissipation capacity.

[0033] The Joule heat generated by the eddy current effect will accumulate in the conductor plate 12, and it is difficult to achieve efficient uniform temperature heat dissipation by traditional air cooling or static liquid cooling. As the working condition intensity increases, the temperature rise of the conductor plate 12 will lead to a decrease in magnetic permeability, a decay in damping coefficient, and even cause thermal deformation of the material, which seriously restricts the stability and life of the device. In order to solve the above problems, further, the unidirectional eddy current buffer vibration reduction device also includes an oil cooling unit 7, and the centrifugal pumping unit 3 and the reverse drive energy consumption unit 4 are respectively connected to the oil cooling unit 7 through the cooling channel 8, so that the heat generated by the conductor plate 12 is brought to the oil cooling unit 7 by the hydraulic oil for circulation, which greatly improves the heat dissipation performance of the conductor plate 12. Compared with the traditional eddy current damper, the present invention not only improves the damping, but also enhances the heat dissipation performance of the conductor plate 12, and its structure is compact and occupies little space. At the same time, the cooling unit is connected with an on-off control valve to control the delivery of cooling oil.

[0034] In this embodiment, the reverse drive energy-consuming unit 4 further includes an oil pump housing 44. The conductor rotating shaft member 42 is rotatably mounted in the oil pump housing 44 through a thrust bearing 6 to ensure the reliable rotation of the conductor rotating shaft member 42. A second seal 45 is provided at the end of the oil pump housing 44 to prevent the oil in the reverse drive energy-consuming unit 4 from leaking out. In this embodiment, the oil-driven wheel 41 is a drive gear or an impeller.

[0035] The present invention significantly improves the damping performance, effectively solves the heat dissipation problem under high-load operation, simplifies the system structure, and realizes the efficient collaborative integration of multiple functions such as damping, cooling, and energy conversion to meet the increasingly stringent buffering and vibration reduction requirements of single-rotation machinery.

[0036] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A single-direction eddy current buffer and shock absorber device, comprising an eddy current damping unit and a torque input shaft connected to a rotating structure, characterized in that, It further includes a centrifugal pumping unit arranged side by side, a reverse drive energy-consuming unit, an oil pumping channel connected between the centrifugal pumping unit and the reverse drive energy-consuming unit, and drive oil in each unit and the oil pumping channel. The energy-consuming magnet of the eddy current damping unit is arranged in the centrifugal pumping unit and fixedly connected to the torque input shaft. The energy-consuming magnet is provided with centrifugal blades for generating centrifugal force on the drive oil. The reverse drive energy-consuming unit includes an oil drive wheel, a conductor rotating shaft member, and a one-way drive part. The conductor rotating shaft member is fixed to the oil drive wheel and extends into the centrifugal pumping unit. The conductor plate of the eddy current damping unit is arranged in the centrifugal pumping unit through the conductor rotating shaft member, and the conductor plate rotates in the reverse direction of the energy-consuming magnet under the action of the one-way drive part.

2. The single-rotation-direction eddy current buffer and shock absorber device according to claim 1, characterized in that The one-way drive part is a one-way clutch. The one-way clutch is arranged on the conductor rotating shaft member and located between the oil drive wheel and the conductor plate.

3. The single-rotation-direction eddy current buffer and shock absorber device according to claim 1, wherein There are multiple centrifugal blades. The centrifugal blades are arc-shaped blades arranged along the rotation direction of the torque input shaft. The multiple arc-shaped blades are evenly arranged along the circumferential direction of the energy-consuming magnet.

4. The single-rotation-direction eddy current buffer and shock absorber device according to claim 3, characterized in that The energy-consuming magnet is provided with centrifugal oil holes. The centrifugal oil holes are multiple arc-shaped oil holes arranged along the rotation direction of the torque input shaft. The arc-shaped oil holes and the centrifugal blades are alternately arranged along the circumferential direction of the energy-consuming magnet.

5. The single-rotation-direction eddy current buffer and shock absorber device according to any one of claims 1 to 4, characterized in that, The centrifugal pumping unit further includes a fixedly arranged eddy current housing. The torque input shaft extends into the eddy current housing and is fixedly connected to the energy-consuming magnet through a mounting plate.

6. The single-rotation-direction eddy current buffer and shock absorber device according to claim 5, wherein, The end of the eddy current housing is provided with a first sealing ring for preventing oil leakage and a thrust bearing for ensuring the rotation of the torque input shaft and the conductor rotating shaft member. The first sealing ring is located outside the thrust bearing. Both ends of the eddy current housing are convexly provided with first mounting cavities. The first sealing ring and the thrust bearing are arranged in the first mounting cavities.

7. The single-rotation-direction eddy current buffer and shock absorber device according to any one of claims 1 to 4, characterized in that, The conductor rotating shaft member is a rotating shaft disk. The disk body of the rotating shaft disk is located in the centrifugal pumping unit. The conductor plate is mounted on the disk body through a conductor back plate.

8. The single-rotation-direction eddy current buffer and shock absorber device according to claim 7, characterized in that The reverse drive energy-consuming unit further includes an oil pump housing. The one-way drive part is arranged in the oil pump housing or the eddy current housing of the centrifugal pumping unit. The conductor rotating shaft member is rotatably mounted in the oil pump housing through a thrust bearing.

9. The single-rotation-direction eddy current buffer and shock absorber device according to claim 7, wherein The oil drive wheel is a drive gear or an impeller.

10. The single-rotation-direction eddy current buffer and shock absorber device according to any one of claims 1 to 4, characterized in that, It further includes an oil cooling unit. The centrifugal pumping unit and the reverse drive energy-consuming unit are respectively communicated with the oil cooling unit through cooling channels. The cooling unit is communicated with an on-off control valve.

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