Frequency modulation type hydraulic damping device for two-phase flow working condition pump

Abstract

The invention belongs to the technical field of hydraulic damping devices, and discloses a frequency modulation type hydraulic damping device for a two-phase flow working condition pump, which comprises a base, a mounting seat is arranged above the base, piston rods are fixedly mounted at the bottom end of the mounting seat, the piston rods are uniformly distributed, the piston rods are sleeved with first springs, and pistons are fixedly connected to the bottom ends of the piston rods. Through holes are evenly formed in the inner wall of the piston in an annular array, the piston is slidably installed in the oil cylinder, when the damping force of the damping device needs to be adjusted, the air cylinder is controlled by the PLC to start to drive the movable disc to move up and down once, and the movable disc drives the first sliding block to move downwards when moving downwards; when moving downwards, the first sliding block slides in the first sliding groove and drives the rotating shaft to rotate through arc guiding, the rotating ring drives the baffle to rotate to close part of the through holes, the total flow area is reduced, damping force is increased for adjustment, the device can adapt to vibration frequency changes under the two-phase flow working condition, and the vibration reduction effect and the system adaptability are improved advantageously.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic damping devices, and particularly relates to a frequency modulation type hydraulic damping device for pumps under two-phase flow conditions. Background Art

[0002] Pumps under two-phase flow conditions are pump products designed specifically for handling gas-liquid, solid-liquid or gas-solid-liquid three-phase mixed media. Their core technology is based on the two-phase flow theory, aiming to solve problems such as low efficiency, fast wear, and easy blockage faced by traditional pumps when transporting multiphase media. Under two-phase flow (such as gas-liquid mixture) conditions, the operation of the pump will generate complex vibrations and impacts, which may lead to equipment damage, reduced efficiency, and even safety accidents. Therefore, for pumps under two-phase flow conditions, the use of damping devices is particularly important;

[0003] After retrieval, for example, in the patent: CN222732438U, a shock-absorbing base for a vacuum pump, including a base, a bottom plate is fixed on the top of the base, a first sleeve is fixed on the top of the bottom plate, a first piston is slidably arranged on the inner side wall of the first sleeve, an airbag is fixed on the inner side wall of the first sleeve and is located below the first piston, a first connecting rod is fixed on the top of the first piston, and one end of the first connecting rod penetrates through the top of the first sleeve, a top plate is fixed at the end of the first connecting rod, a protective cover is arranged on the top of the top plate, and a collar is sleeved on the side wall of the first sleeve. This utility model performs two-stage buffering on the vibrations generated during the operation of the vacuum pump through the first buffering mechanism and the second buffering mechanism, improving the shock-absorbing effect and extending the service life of the vacuum pump. At the same time, through two air extraction mechanisms, the air inside the protective cover is extracted, gradually forming a vacuum state inside the protective cover, preventing noise from spreading and reducing the noise pollution to the outside;

[0004] Since the density, viscosity, and flow state of the fluid change with the working conditions when the pump is operating under two-phase flow conditions, resulting in unstable operation of the pump and easy occurrence of vibrations, the natural frequency of traditional damping devices is fixed and it is difficult to adapt to the changes in vibration frequencies under two-phase flow conditions, and the damping effect is limited. Therefore, a frequency modulation type hydraulic damping device for pumps under two-phase flow conditions is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a frequency modulation type hydraulic damping device for pumps under two-phase flow conditions to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A frequency modulation type hydraulic shock absorber for a two-phase flow working condition pump, including a base, an installation seat is arranged above the base, a piston rod is fixedly installed at the bottom end of the installation seat, the piston rods are evenly distributed, a first spring is sleeved outside the piston rod, the bottom end of the piston rod is fixedly connected to a piston, through holes are evenly arranged in a circular array on the inner wall of the piston, the piston is slidably installed inside an oil cylinder, and the oil cylinder is arranged inside the base;

[0007] A rotating ring is rotatably installed inside the piston rod, baffles are evenly installed in a circular array on the outer wall of the rotating ring, a toothed block is fixedly installed on the inner wall of the rotating ring, a first gear is embedded inside the rotating ring, a rotating shaft is fixedly connected to the inner wall of the first gear, a first chute is arranged on the outer wall at the top of the rotating shaft, a first slider is slidably installed on the inner wall of the first chute, a moving disk is arranged above the first slider, and a cylinder is installed at the top end of the moving disk, and the cylinder is installed inside the installation seat.

[0008] As a further technical solution of the present invention, two groups of rotating rings are provided, and the two groups of rotating rings are respectively arranged on both sides of the piston.

[0009] As a further technical solution of the present invention, the baffles on the outer walls of the two groups of rotating rings are arranged staggeredly.

[0010] As a further technical solution of the present invention, the toothed blocks inside the two groups of rotating rings are distributed staggeredly.

[0011] As a further technical solution of the present invention, two first gears are provided, and the toothed blocks on the outer walls of the two first gears are in the same position.

[0012] As a further technical solution of the present invention, the first slider is slidably installed inside the installation seat, and a second spring is arranged at the bottom end of the first slider.

[0013] As a further technical solution of the present invention, the moving disk is arranged at the top end of the rotating shaft, and the moving disk is slidably connected to the rotating shaft.

[0014] As a further technical solution of the present invention, a transmission shaft is arranged on one side of the piston rod, the transmission shaft is fixedly installed at the top end of the base, a rotating disk is arranged on the outer wall of the transmission shaft, the rotating disk is rotatably installed inside the installation seat, a second slider is fixedly connected to the inner wall of the rotating disk, the second slider is slidably installed on the inner wall of a second chute, the second chute is arranged on the outer wall of the transmission shaft, a convex block is fixedly installed on the outer wall of the rotating disk, a moving plate is arranged on one side of the convex block, a rack plate is fixedly connected to one side of the moving plate, a second round gear is arranged on one side of the rack plate, and the second round gear is fixedly installed on the outer wall of the rotating shaft.

[0015] As a further technical solution of the present invention, the movable plate is slidably installed inside the mounting seat, and a third spring is arranged on one side of the movable plate.

[0016] As a further technical solution of the present invention, the first slider is slidably connected to the movable disk.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. Through the setting of controlling the baffle to block some through holes in the present invention, when it is necessary to adjust the damping force of the shock absorption device, the cylinder is started by the PLC. When the cylinder starts, it drives the movable disk to move up and down once. When the movable disk moves down, it drives the first slider to move down. When the first slider moves down, it slides in the first chute and drives the rotating shaft to rotate through the arc-shaped guide. The rotation of the rotating shaft drives the rotation of the first gear. When the first gear rotates and meshes with the tooth block, it drives the rotation of the rotating ring. The rotation of the rotating ring drives the rotation of the baffle, so that the baffle rotates to the top of the through hole to close some through holes, reducing the total flow area and increasing the damping force, thereby adjusting to enable the device to adapt to the change of the vibration frequency under the two-phase flow condition, which helps to improve the shock absorption effect and enhance the system adaptability.

[0019] 2. There are two sets of rotating rings in the present invention. During the first adjustment, the rotating ring at the top of the piston rotates, driving the baffle to close a set of through holes. During the second adjustment, the rotating ring at the bottom of the piston rotates, driving the baffle to close a set of through holes. When adjusted twice, the two sets of through holes are closed. At this time, the total flow area is the minimum and the damping force is the maximum, enabling the device to perform multi-stage adjustment. By setting different damping forces, the shock absorption effect is optimized to meet diverse requirements.

[0020] 3. Through the setting that the convex block swings in the mounting seat in the present invention, when the device vibrates, the mounting seat moves up and down, driving the transmission shaft to slide in the inner wall of the rotating disk. The second slider is driven to slide through the second chute guide, thereby causing the rotating disk to rotate. The rotation of the rotating disk drives the rotation of the convex block. At the same time, the elastic potential energy of the first spring causes the convex block to swing in the mounting seat. When the vibration amplitude generated by the device is large, the swing amplitude of the convex block increases. When the convex block rotates towards the side of the movable plate and contacts it, it drives the movable plate to move. The movement of the movable plate drives the movement of the rack plate. The movement of the rack plate drives the rotation of the second wheel. The rotation of the second wheel drives the rotation of the rotating shaft. Similarly, the rotating ring and the baffle rotate to close the through holes for damping adjustment, enabling the device to automatically adjust to effectively absorb and attenuate the vibration energy, improving the stability and reliability of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged schematic view of the structure at position A in the present invention;

[0024] Figure 4 Schematic cross-sectional view of the structure at the piston rod of the present invention;

[0025] Figure 5 Schematic view of the structure at the rotating ring of the present invention;

[0026] Figure 6 Schematic cross-sectional view of the structure at the rotating disc of the present invention;

[0027] Figure 7 Schematic view of the structure at the rotating shaft of the present invention.

[0028] In the figure: 1, base; 2, mounting seat; 3, piston rod; 4, piston; 5, oil cylinder; 6, first spring; 7, through hole; 8, rotating ring; 9, baffle; 10, tooth block; 11, first gear; 12, rotating shaft; 13, first chute; 14, first slider; 15, moving plate; 16, air cylinder; 17, second spring; 18, transmission shaft; 19, second chute; 20, second slider; 21, rotating disc; 22, convex block; 23, moving board; 24, rack plate; 25, second wheel; 26, third spring. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figures 1 to 7 shown, in the embodiment of the present invention, a frequency modulation type hydraulic shock absorber for a two-phase flow working condition pump includes a base 1, a mounting seat 2 is arranged above the base 1, a piston rod 3 is fixedly installed at the bottom end of the mounting seat 2, the piston rods 3 are evenly distributed, a first spring 6 is sleeved outside the piston rod 3, the bottom end of the piston rod 3 is fixedly connected to a piston 4, through holes 7 are evenly arranged in an annular array on the inner wall of the piston 4, the piston 4 is slidably installed inside an oil cylinder 5, and the oil cylinder 5 is arranged inside the base 1;

[0031] A rotating ring 8 is rotatably installed inside the piston rod 3. A plurality of baffles 9 are evenly installed on the outer wall of the rotating ring 8 in an annular array. A toothed block 10 is fixedly installed on the inner wall of the rotating ring 8. A first gear 11 is embedded inside the rotating ring 8. A rotating shaft 12 is fixedly connected to the inner wall of the first gear 11. A first sliding groove 13 is formed on the outer wall of the top of the rotating shaft 12. A first slider 14 is slidably installed on the inner wall of the first sliding groove 13. A moving disk 15 is arranged above the first slider 14. A cylinder 16 is installed at the top of the moving disk 15. The cylinder 16 is installed inside the mounting seat 2.

[0032] During operation, first, the two-phase flow working condition pump is installed on the top of the mounting seat 2. When the pump vibrates, the mounting seat 2 drives the piston rod 3 to move downward. The movement of the piston rod 3 drives the piston 4 to slide inside the oil cylinder 5. The oil liquid inside the oil cylinder 5 flows from one side of the piston 4 to the other side through the through hole 7, and the vibration is attenuated through the damping effect of the liquid flow.

[0033] When it is necessary to adjust the damping force of the shock absorption device, the cylinder 16 is controlled by the PLC to start. When the cylinder 16 starts, it drives the moving disk 15 to move up and down once. When the moving disk 15 moves downward, it drives the first slider 14 to move downward. When the first slider 14 moves downward, it slides inside the first sliding groove 13 and drives the rotating shaft 12 to rotate through the arc-shaped guide. The rotation of the rotating shaft 12 drives the rotation of the first gear 11. When the first gear 11 rotates and meshes with the toothed block 10, it drives the rotating ring 8 to rotate. The rotation of the rotating ring 8 drives the rotation of the baffle 9, so that the baffle 9 rotates to the top of the through hole 7 to close part of the through hole 7, reducing the total flow area and increasing the damping force, thereby adjusting the device to adapt to the change of the vibration frequency under the two-phase flow working condition, which helps to improve the shock absorption effect and enhance the system adaptability.

[0034] As Figures 1 to 7 shown, two sets of rotating rings 8 are provided, and the two sets of rotating rings 8 are respectively arranged on both sides of the piston 4.

[0035] A total of three sets of through holes 7 are provided, and the number of each set of through holes 7 is the same as the number of baffles 9 on the outer wall of the rotating ring 8.

[0036] During the first adjustment, the rotating ring 8 on the top of the piston 4 rotates, driving the baffle 9 to close a set of through holes 7.

[0037] During the second adjustment, the rotating ring 8 at the bottom of the piston 4 rotates, driving the baffle 9 to close a set of through holes 7. When adjusted twice, two sets of through holes 7 are closed. At this time, the total flow area is the minimum and the damping force is the maximum, enabling the device to perform multi-stage adjustment. By setting different damping forces, the shock absorption effect is optimized to meet diverse requirements.

[0038] As Figure 4 and Figure 5 shown, the baffles 9 on the outer walls of the two sets of rotating rings 8 are staggered.

[0039] As Figure 5 shown, the toothed blocks 10 inside the two groups of rotating rings 8 are staggered.

[0040] As Figure 7 shown, there are two first gears 11, and the positions of the toothed blocks 10 on the outer walls of the two first gears 11 are the same.

[0041] When the rotating shaft 12 rotates each time, it drives the two groups of rotating rings 8 to rotate in sequence for step-by-step adjustment.

[0042] As Figure 3 shown, the first slider 14 is slidably installed inside the mounting seat 2, and a second spring 17 is arranged at the bottom end of the first slider 14.

[0043] During adjustment, when the moving disk 15 drives the first slider 14 to move downward, the second spring 17 is deformed by force to store elastic potential energy. When the moving disk 15 moves upward, the elastic potential energy is released through the second spring 17 to drive the first slider 14 to move upward and reset, so that the first slider 14 is located at the bottom end of the moving disk 15 after adjustment, facilitating subsequent adjustment.

[0044] As Figure 2 and Figure 3 shown, the moving disk 15 is arranged at the top end of the rotating shaft 12, and the moving disk 15 is slidably connected to the rotating shaft 12.

[0045] As Figures 1 to 7 shown, a transmission shaft 18 is arranged on one side of the piston rod 3. The transmission shaft 18 is fixedly installed at the top end of the base 1. A rotating disk 21 is arranged on the outer wall of the transmission shaft 18. The rotating disk 21 is rotatably installed inside the mounting seat 2. A second slider 20 is fixedly connected to the inner wall of the rotating disk 21. The second slider 20 is slidably installed on the inner wall of the second chute 19. The second chute 19 is opened on the outer wall of the transmission shaft 18. A convex block 22 is fixedly installed on the outer wall of the rotating disk 21. A moving plate 23 is arranged on one side of the convex block 22. A rack plate 24 is fixedly connected to one side of the moving plate 23. A second gear 25 is arranged on one side of the rack plate 24. The second gear 25 is fixedly installed on the outer wall of the rotating shaft 12.

[0046] When the device vibrates, the mounting seat 2 moves up and down to drive the transmission shaft 18 to slide in the inner wall of the rotating disk 21. The second slider 20 is driven to slide through the guiding of the second chute 19, so that the rotating disk 21 rotates. The rotation of the rotating disk 21 drives the rotation of the convex block 22. At the same time, the elastic potential energy of the first spring 6 enables the convex block 22 to swing inside the mounting seat 2;

[0047] When the vibration amplitude generated by the device is relatively large, the swing amplitude of the bump 22 increases. When the bump 22 rotates towards one side of the moving plate 23 and contacts it, the moving plate 23 is driven to move. The movement of the moving plate 23 drives the movement of the rack plate 24. The movement of the rack plate 24 drives the rotation of the second wheel 25. The rotation of the second wheel 25 drives the rotation of the rotating shaft 12. Similarly, the rotating ring 8 and the baffle 9 are rotated to close the through hole 7 for damping adjustment, enabling the device to automatically adjust, effectively absorb and attenuate vibration energy, and improve the stability and reliability of the pump.

[0048] As Figure 2 and Figure 3 shown, the moving plate 23 is slidably installed inside the mounting seat 2, and a third spring 26 is provided on one side of the moving plate 23.

[0049] When the moving plate 23 moves, the third spring 26 deforms to store elastic potential energy, and the elastic potential energy is released through the third spring 26 to make it move back to its original position.

[0050] When the bump 22 is not in contact with the moving plate 23, the elastic potential energy of the third spring 26 causes the moving plate 23 to move away from the second wheel 25. At this time, the rack plate 24 is not engaged with the second wheel 25.

[0051] As Figure 2 and Figure 3 shown, the first slider 14 is slidably connected to the moving disk 15

[0052] When the device adjusts due to its own vibration amplitude, the rotation of the rotating shaft 12 drives the first slider 14 to move up and down. At this time, the up and down movement of the first slider 14 is not affected by the moving disk 15, improving the stability of the device.

[0053] Working principle and usage process:

[0054] When it is necessary to adjust the damping force of this shock absorption device, the PLC is used to control the cylinder 16 to start. When the cylinder 16 starts, it drives the moving disk 15 to move up and down once. When the moving disk 15 moves down, it drives the first slider 14 to move down. When the first slider 14 moves down, it slides in the first chute 13 and drives the rotating shaft 12 to rotate through the arc-shaped guide. The rotation of the rotating shaft 12 drives the rotation of the first gear 11. When the first gear 11 rotates and meshes with the tooth block 10, it drives the rotating ring 8 to rotate. The rotation of the rotating ring 8 drives the rotation of the baffle 9, causing the baffle 9 to rotate to the top of the through hole 7 to close a group of through holes 7, reducing the total flow area and increasing the damping force;

[0055] During operation, first, the two-phase flow working condition pump is installed on the top of the mounting seat 2. When the pump vibrates, the mounting seat 2 drives the piston rod 3 to move down. The movement of the piston rod 3 drives the piston 4 to slide in the oil cylinder 5. The oil in the oil cylinder 5 flows from one side of the piston 4 to the other side through the through hole 7, and the vibration is attenuated through the damping effect of the liquid flow;

[0056] When the device generates vibrations, the mounting base 2 moves up and down, driving the transmission shaft 18 to slide within the inner wall of the rotating disk 21. Guided by the second sliding groove 19, the second slider 20 is driven to slide, causing the rotating disk 21 to rotate. The rotation of the rotating disk 21 drives the rotation of the convex block 22. At the same time, the elastic potential energy of the first spring 6 causes the convex block 22 to swing within the mounting base 2.

[0057] When the vibration amplitude generated by the device is relatively large, the swinging amplitude of the convex block 22 increases. When the convex block 22 rotates towards one side of the moving plate 23 and contacts it, the moving plate 23 is driven to move. The movement of the moving plate 23 drives the movement of the rack plate 24. The movement of the rack plate 24 drives the rotation of the second wheel 25. The rotation of the second wheel 25 drives the rotation of the rotating shaft 12. Similarly, the rotating ring 8 and the baffle 9 are rotated to close a set of through holes 7 for damping adjustment, enabling the device to automatically adjust, effectively absorbing and attenuating vibration energy, and improving the stability and reliability of the pump.

[0058] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump, comprising a base (1), characterized in that: Above the base (1), there is a mounting base (2). At the bottom end of the mounting base (2), a piston rod (3) is fixedly installed. The piston rods (3) are evenly distributed. A first spring (6) is sleeved outside the piston rod (3). At the bottom end of the piston rod (3), a piston (4) is fixedly connected. Through holes (7) are evenly arranged in a circular array on the inner wall of the piston (4). The piston (4) is slidably installed inside an oil cylinder (5), and the oil cylinder (5) is arranged inside the base (1). Inside the piston rod (3), a rotating ring (8) is rotatably installed. On the outer wall of the rotating ring (8), baffles (9) are evenly arranged in a circular array. On the inner wall of the rotating ring (8), a toothed block (10) is fixedly installed. Inside the rotating ring (8), a first gear (11) is embedded. On the inner wall of the first gear (11), a rotating shaft (12) is fixedly connected. On the outer wall at the top of the rotating shaft (12), a first sliding groove (13) is opened. Inside the first sliding groove (13), a first slider (14) is slidably installed. Above the first slider (14), there is a moving disk (15). At the top end of the moving disk (15), a cylinder (16) is installed, and the cylinder (16) is installed inside the mounting base (2).

2. The frequency modulation type hydraulic shock absorber for a two-phase flow working condition pump according to claim 1, characterized in that: There are two groups of the rotating rings (8), and the two groups of rotating rings (8) are respectively arranged on both sides of the piston (4).

3. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump according to claim 1, characterized in that: The baffles (9) on the outer walls of the two groups of rotating rings (8) are arranged staggeredly.

4. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump according to claim 1, characterized in that: The toothed blocks (10) inside the two groups of rotating rings (8) are distributed staggeredly.

5. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump according to claim 1, characterized in that: There are two first gears (11), and the positions of the toothed blocks on the outer walls of the two first gears (11) are the same.

6. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump according to claim 1, characterized in that: The first slider (14) is slidably installed inside the mounting base (2), and a second spring (17) is arranged at the bottom end of the first slider (14).

7. A frequency modulation type hydraulic shock absorber for a two-phase flow working condition pump according to claim 1, characterized in that: The moving disk (15) is arranged at the top end of the rotating shaft (12), and the moving disk (15) is slidably connected with the rotating shaft (12).

8. A frequency-modulated hydraulic shock absorber for a two-phase flow condition pump according to claim 1, characterized in that: On one side of the piston rod (3), there is a transmission shaft (18). The transmission shaft (18) is fixedly installed at the top end of the base (1). On the outer wall of the transmission shaft (18), there is a rotating disk (21). The rotating disk (21) is rotatably installed inside the mounting base (2). On the inner wall of the rotating disk (21), a second slider (20) is fixedly connected. The second slider (20) is slidably installed inside a second sliding groove (19) opened on the outer wall of the transmission shaft (18). On the outer wall of the rotating disk (21), a convex block (22) is fixedly installed. On one side of the convex block (22), there is a moving plate (23). On one side of the moving plate (23), a rack plate (24) is fixedly connected. On one side of the rack plate (24), there is a second wheel (25), and the second wheel (25) is fixedly installed on the outer wall of the rotating shaft (12).

9. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump according to claim 8, characterized in that: The moving plate (23) is slidably installed inside the mounting base (2), and a third spring (26) is arranged on one side of the moving plate (23).

10. A frequency modulation type hydraulic shock absorber for a two-phase flow condition pump according to claim 1, characterized in that: The first slider (14) is slidably connected with the moving disk (15).

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