Energy-saving jet pump with band saw blade air inlet
By using a jet pump with a serrated air inlet, the energy loss and clogging problems of traditional jet pumps are solved by breaking up the vortex with the serrated structure, thus achieving efficient and stable fluid delivery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI SHIJIU MARINE EQUIP CO LTD
- Filing Date
- 2026-03-21
- Publication Date
- 2026-06-16
Smart Images
Figure CN122216173A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of jet pumps, and in particular to an energy-saving jet pump with a serrated air inlet. Background Technology
[0002] A jet pump is a fluid mechanical device that uses the kinetic energy of a high-speed fluid (working medium) to transport, pressurize, or mix another fluid (the pumped medium). It is widely used in wastewater treatment, aquaculture, chemical industry and other fields. Its core principle is based on the Bernoulli effect—when a high-speed fluid passes through a nozzle, it forms a low-pressure zone, thereby drawing in and driving the movement of the surrounding fluid. That is, the working medium (such as water, steam, or gas) is ejected at high speed through the nozzle, forming a low-pressure zone in the mixing chamber, drawing in and entraining the pumped medium (liquid, gas, or gas-liquid mixture). The two are mixed and pressurized in the diffuser before being discharged.
[0003] However, the air inlet of traditional jet pumps is usually a simple circular straight hole or a smooth flared opening. When the working fluid (such as water) passes through the throat at high speed, a violent vortex and air resistance are generated at the air inlet, causing some energy to be consumed in overcoming the vortex resistance, reducing the ejection efficiency and increasing energy consumption. At the same time, unstable air intake may cause pump body vibration and aggravate cavitation. Long-term operation will damage the internal structure of the pump body. Furthermore, the smooth opening has poor diversion effect on the tiny water droplets or impurities in the intake gas, which are easy to adhere and accumulate at the edge of the opening, causing the air intake channel to gradually narrow or even block, increasing the failure rate. Therefore, it is necessary to propose an energy-saving jet pump with a serrated air inlet to solve the above problems. Summary of the Invention
[0004] To address the problem that the air inlet of existing conventional jet pumps is usually a simple circular straight hole or a smooth flared opening, which generates severe eddies and air resistance at the air inlet when the working fluid (such as water) passes through the throat at high speed, resulting in large energy loss, vibration, cavitation, and easy blockage, this application provides an energy-saving jet pump with a serrated air inlet.
[0005] This application provides an energy-saving jet pump with a serrated air inlet, which adopts the following technical solution: An energy-saving jet pump with a serrated air inlet includes a jet pump body, a working fluid inlet on the right side of the jet pump body, a mixed fluid outlet on the left side of the jet pump body, a first crushing component inside the jet pump body, a second crushing component to the left of the first crushing component, and a third crushing component to the left of the second crushing component. The first, second, and third crushing components are used to gradually crush the fluid inside the jet pump body.
[0006] Through the cooperation of the first, second, and third crushing components, with the first, second, and third sawtooth blocks arranged sequentially from right to left, the sawtooth structure effectively breaks down large vortices formed at the air inlet into multiple smaller, more stable micro-vortices. This significantly reduces air intake resistance, allowing the ejector fluid to enter the throat more smoothly, thereby improving ejection efficiency and saving energy consumption of the working fluid under the same operating conditions. The improved airflow field is more stable, reducing pump body vibration and cavitation caused by vortex shedding, enhancing the stability of equipment operation, and extending the lifespan of the jet pump body and its internal structure. The serrated sharp edges extend the service life of the pump; furthermore, they disrupt the surface tension of the liquid, making it difficult for tiny water droplets carried in the intake gas to adhere and condense at the orifice edge. At the same time, the non-smooth surface formed by the serrations is not conducive to the deposition of impurities, providing a good self-cleaning effect. This effectively prevents blockage of the air intake channel, reduces maintenance requirements, and solves the problem that the air intake of existing jet pumps is usually a simple circular straight hole or a smooth flared mouth. When the working fluid passes through the throat at high speed, a violent vortex and air resistance are generated at the air intake. This reduces energy loss, vibration and cavitation, and blockage, thereby improving efficiency and reducing energy consumption and failure rate.
[0007] A further improvement of the technical solution of this application is as follows: the first crushing component includes a first fixed ring, which is fixedly connected to the inner wall of the jet pump body. A first rotating ring is rotatably installed inside the first fixed ring via a bearing. A plurality of first sawtooth blocks are fixedly connected in a circumferential direction inside the first rotating ring. The second crushing component includes a second fixed ring, which is fixedly connected to the inner wall of the jet pump body. A second rotating ring is rotatably installed inside the second fixed ring via a bearing. A plurality of second sawtooth blocks are fixedly connected in a circumferential direction inside the second rotating ring. The third crushing component includes a third fixed ring, which is fixedly connected to the inner wall of the jet pump body. A third rotating ring is rotatably installed inside the third fixed ring via a bearing. A plurality of third sawtooth blocks are fixedly connected in a circumferential direction inside the third rotating ring.
[0008] In the above technical solution, by rotating the first rotating ring and the first fixed ring, the second rotating ring and the second fixed ring, and the third fixed ring and the third rotating ring respectively, the first rotating ring, the second rotating ring and the third rotating ring can all rotate during the operation of the jet pump body. This automatically adjusts the rotation of the first sawtooth block, the jet pump body of the first sawtooth block, and the third sawtooth block, thereby achieving dynamic fluid breaking and further improving the fluid breaking effect.
[0009] A further improvement of the technical solution of this application is that the number of second sawtooth blocks is less than the number of first sawtooth blocks, and the spacing between any two second sawtooth blocks located on the same horizontal line is greater than the spacing between any two first sawtooth blocks located on the same horizontal line.
[0010] By adopting the above technical solution, the number of the first, second, and third sawtooth blocks is reduced sequentially, while the spacing is increased sequentially. This allows for the placement of denser and deeper first sawtooth blocks at the point where the fluid just enters the jet pump body (high-velocity zone), slightly sparser and shallower second sawtooth blocks in the middle position, and even sparser and gentler third sawtooth blocks in the relatively flat left region. This achieves optimal flow field optimization with minimal structural modifications, further improving the fluid breaking effect.
[0011] A further improvement of the technical solution of this application is that the number of third sawtooth blocks is less than the number of second sawtooth blocks, and the spacing between any two third sawtooth blocks located on the same horizontal line is greater than the spacing between any two second sawtooth blocks located on the same horizontal line.
[0012] By adopting the above technical solution, the number of the first, second, and third sawtooth blocks is reduced sequentially, while the spacing is increased sequentially. This allows for the placement of denser and deeper first sawtooth blocks at the point where the fluid just enters the jet pump body (high-velocity zone), slightly sparser and shallower second sawtooth blocks in the middle position, and even sparser and gentler third sawtooth blocks in the relatively flat left region. This achieves optimal flow field optimization with minimal structural modifications, further improving the fluid breaking effect.
[0013] A further improvement of the technical solution of this application is that: the first sawtooth block has a wave-shaped first groove on both the left and right sides, the second sawtooth block has a wave-shaped second groove on both the left and right sides, and the third sawtooth block has a wave-shaped third groove on both the left and right sides.
[0014] By adopting the above technical solution, the wave-shaped grooves on the left and right sides of the first, second, and third sawtooth blocks can further guide the airflow and enhance its mixing with the working fluid, thereby further improving efficiency.
[0015] A further improvement of the technical solution of this application is that: a plurality of first guide vanes are fixedly installed on the right side of the first rotating ring in a circumferential direction, a plurality of second guide vanes are fixedly installed on the right side of the second rotating ring in a circumferential direction, and a plurality of third guide vanes are fixedly installed on the right side of the third rotating ring in a circumferential direction.
[0016] The above technical solution involves installing a first guide vane on the right side of the first rotating ring, a second guide vane on the right side of the second rotating ring, and a third guide vane on the right side of the third rotating ring. The first, second, and third guide vanes are in a specific inclined state, so they expand when the fluid comes into contact with them, thereby guiding and limiting the rotation trajectory of the first, second, and third rotating rings, and further promoting their rotation effect.
[0017] A further improvement of the technical solution of this application is that a guide plate is fixedly installed inside the jet pump body on the right side of the first fixed ring, and the guide plate is in a spiral shape.
[0018] By adopting the above technical solution, a spiral-shaped guide plate is set before the fixed plate, which can provide a continuous and smooth transition surface. This allows the fluid entering the jet pump body to flow along the spiral surface of the guide plate without sharp impacts or leading edge separation. This ensures that the fluid generates a uniform and stable swirling flow, and the swirling flow is consistent with the design rotation direction of the subsequent serrated ring. This reduces the resistance to driving the serrated ring to rotate and ensures that the subsequent serrated ring can rotate more easily.
[0019] A further improvement of the technical solution of this application is that: a flow stabilizing ring is fixedly installed inside the jet pump body on the left side of the third fixed ring, and several interference flow rods are fixedly connected inside the flow stabilizing ring in a circumferential direction.
[0020] By adopting the above technical solution, a flow stabilizing ring is set after the third fixed ring, and a small disturbance flow rod is set, so that the interior of the flow stabilizing ring is divided into multiple small spaces, which can further break up the small vortices coming out of the rotating saw teeth, improve the uniformity and stability of the fluid flow, and thus further suppress vibration and cavitation.
[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. This application provides an energy-saving jet pump with a serrated air inlet. By assembling a first, second, and third crushing component, wherein the first, second, and third serrated blocks are arranged sequentially from right to left, the serrated structure effectively breaks up large vortices formed at the air inlet, decomposing them into multiple smaller, more stable micro-vortices. This reduces air intake resistance, allowing the ejector fluid to enter the throat more smoothly, thereby improving ejection efficiency. Under the same operating conditions, it saves energy consumption of the working fluid. The improved airflow field is more stable, reducing pump body vibration and air leakage caused by vortex shedding. The corrosion phenomenon improves the stability of equipment operation, extends the service life of the jet pump body and its internal structure, and the serrated sharp edges disrupt the surface tension of the liquid, making it difficult for tiny water droplets carried in the intake gas to adhere and condense at the edge of the orifice. At the same time, the non-smooth surface formed by the serrations is not conducive to the deposition of impurities, has a good self-cleaning effect, effectively prevents the blockage of the air intake channel, and reduces maintenance needs. This solves the problem that the air intake of existing jet pumps is usually a simple circular straight hole or a smooth flared mouth, which will generate severe turbulence and air resistance at the air intake when the working fluid passes through the throat at high speed.
[0022] 2. This application provides an energy-saving jet pump with a serrated air inlet. By rotating the first rotating ring and the first fixed ring, the second rotating ring and the second fixed ring, and the third fixed ring and the third rotating ring respectively, and by setting the first guide vane, the second guide vane and the third guide vane, the first rotating ring, the second rotating ring and the third rotating ring can rotate, thereby automatically adjusting the rotation of the first serrated block, the first serrated block jet pump body and the third serrated block, dynamically breaking the fluid, and further improving the fluid breaking effect.
[0023] 3. This application provides an energy-saving jet pump with a serrated air inlet. By successively reducing the number of the first, second, and third serrated blocks and increasing their spacing, a denser and deeper first serrated block can be set at the position where the fluid just enters the jet pump body (high flow velocity zone), a slightly sparser and shallower second serrated block can be set in the middle position, and a sparser and gentler third serrated block can be set in the relatively flat left area. This achieves the best flow field optimization effect with smaller overall structural modifications, further improving the fluid breaking effect.
[0024] 4. This application provides an energy-saving jet pump with a serrated air inlet. By opening wave-shaped grooves on the left and right sides of the first, second, and third serrated blocks, the airflow can be further guided and its mixing with the working fluid can be enhanced, thereby further improving efficiency. Attached Figure Description
[0025] Figure 1 This is a perspective view of this application; Figure 2 This is a partial cross-sectional structural diagram of the jet pump body of this application; Figure 3 This is a partial structural schematic diagram of the front cross-section of the jet pump body of this application; Figure 4 This is a partial structural diagram of the third rotating ring of this application; Figure 5 This is a partial structural diagram of the second rotating ring of this application; Figure 6 This is a partial structural diagram of the first rotating ring of this application; Figure 7 This is a partial structural diagram of the deflector plate of this application; Figure 8 This is a partial structural diagram of the current stabilizing ring of this application.
[0026] Explanation of reference numerals in the attached drawings: 1. Jet pump body; 2. Working fluid inlet; 3. Mixed fluid outlet; 4. First fixed ring; 5. First rotating ring; 6. Second fixed ring; 7. Second rotating ring; 8. Third fixed ring; 9. Third rotating ring; 10. First serrated block; 11. Second serrated block; 12. Third serrated block; 13. First guide vane; 14. Second guide vane; 15. Third guide vane; 16. Flow guide plate; 17. Flow stabilizing ring; 18. Baffle rod. Detailed Implementation
[0027] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. Example
[0028] See Figure 1 , Figure 2 and Figure 3 This application provides an energy-saving jet pump with a serrated air inlet, including a jet pump body 1. The jet pump body 1 has a working fluid inlet 2 on its right side and a mixed fluid outlet 3 on its left side. The jet pump body 1 has a first crushing component inside, a second crushing component to the left of the first crushing component, and a third crushing component to the left of the second crushing component. The first crushing component, the second crushing component, and the third crushing component are used to gradually crush the fluid inside the jet pump body 1.
[0029] In this embodiment, through the cooperation of the first, second, and third crushing components, and by sequentially arranging the first serrated block 10, the second serrated block 11, and the third serrated block 12 from right to left, the serrated structure effectively breaks up the large vortex formed at the air inlet, decomposing it into multiple smaller and more stable micro-vortices. This significantly reduces air intake resistance, allowing the ejector fluid to enter the throat more smoothly, thereby improving ejection efficiency and saving energy consumption of the working fluid under the same operating conditions. The improved airflow field is more stable, reducing pump body vibration and cavitation caused by vortex shedding, improving the stability of equipment operation, and extending the life of the jet pump body. 1. The service life of its internal structure; and the serrated sharp edges disrupt the surface tension of the liquid, making it difficult for tiny water droplets carried in the intake gas to adhere and condense at the edge of the orifice. At the same time, the non-smooth surface formed by the serrations is not conducive to the deposition of impurities, and has a good self-cleaning effect, effectively preventing the blockage of the air intake channel, reducing maintenance needs, and thus solving the problem that the air intake of existing jet pumps is usually a simple circular straight hole or a smooth flared mouth. When the working fluid passes through the throat at high speed, a violent vortex and air resistance will be generated at the air intake. This reduces energy loss, reduces vibration and cavitation, is not easy to block, improves efficiency, and reduces energy consumption and failure rate. Example
[0030] See Figure 3 , Figure 4 , Figure 5 and Figure 6Based on Embodiment 1, this application provides a technical solution: Preferably, the first crushing component includes a first fixed ring 4, which is fixedly connected to the inner wall of the jet pump body 1. A first rotating ring 5 is rotatably mounted inside the first fixed ring 4 via a bearing, and a plurality of first sawtooth blocks 10 are fixedly connected circumferentially inside the first rotating ring 5. The second crushing component includes a second fixed ring 6, which is fixedly connected to the inner wall of the jet pump body 1. A second rotating ring 7 is rotatably mounted inside the second fixed ring 6 via a bearing, and a plurality of second sawtooth blocks 11 are fixedly connected circumferentially inside the second rotating ring 7. The third crushing component includes a third fixed ring 8, which is fixedly connected to the inner wall of the jet pump body 1. A first rotating ring 5 is rotatably mounted inside the third fixed ring 6 via a bearing. The device is equipped with a third rotating ring 9, and several third sawtooth blocks 12 are fixedly connected in a circumferential direction inside the third rotating ring 9; the number of second sawtooth blocks 11 is less than the number of first sawtooth blocks 10, and the distance between any two second sawtooth blocks 11 located on the same horizontal line is greater than the distance between any two first sawtooth blocks 10 located on the same horizontal line; the number of third sawtooth blocks 12 is less than the number of second sawtooth blocks 11, and the distance between any two third sawtooth blocks 12 located on the same horizontal line is greater than the distance between any two second sawtooth blocks 11 located on the same horizontal line; wavy grooves are provided on both the left and right sides of the first sawtooth block 10; wavy grooves are provided on both the left and right sides of the second sawtooth block 11; wavy grooves are provided on both the left and right sides of the third sawtooth block 12.
[0031] In this embodiment, by rotating the first rotating ring 5 with the first fixed ring 4, the second rotating ring 7 with the second fixed ring 6, and the third fixed ring 8 with the third rotating ring 9 respectively, during the operation of the jet pump body 1, the first rotating ring 5, the second rotating ring 7, and the third rotating ring 9 can all rotate, thereby automatically adjusting the rotation of the first sawtooth block 10, the jet pump body 1, and the third sawtooth block 12, thus achieving dynamic fluid breaking and further improving the fluid breaking effect; by sequentially reducing the number of the first sawtooth block 10, the second sawtooth block 11, and the third sawtooth block 12, while sequentially increasing the spacing, it is possible to dynamically break the fluid. The first serrated block 10, which is denser and deeper, is set at the position just inside the jet pump body 1 (high flow rate zone). The second serrated block 11, which is slightly sparser and shallower than the first serrated block 10, is set in the middle position. The third serrated block 12, which is sparser and gentler, is set in the relatively flattest left area. This achieves the best flow field optimization effect with less structural modification, and further improves the effect of fluid breaking. By opening wave-shaped grooves on the left and right sides of the first serrated block 10, the second serrated block 11 and the third serrated block 12, the airflow can be further guided and its mixing with the working fluid can be enhanced, thereby further improving efficiency. Example
[0032] See Figure 2 , Figure 3 , Figure 7 and Figure 8 Based on Embodiment 2, this application provides a technical solution: Preferably, a plurality of first guide vanes 13 are fixedly installed on the right side of the first rotating ring 5 in a circumferential direction, a plurality of second guide vanes 14 are fixedly installed on the right side of the second rotating ring 7 in a circumferential direction, and a plurality of third guide vanes 15 are fixedly installed on the right side of the third rotating ring 9 in a circumferential direction; a guide plate 16 is fixedly installed inside the jet pump body 1 on the right side of the first fixed ring 4, and the guide plate 16 is spiral in shape; a flow stabilizing ring 17 is fixedly installed inside the jet pump body 1 on the left side of the third fixed ring 8, and a plurality of interference flow rods 18 are fixedly connected inside the flow stabilizing ring 17 in a circumferential direction.
[0033] In this embodiment, a first guide vane 13 is installed on the right side of the first rotating ring 5, a second guide vane 14 is installed on the right side of the second rotating ring 7, and a third guide vane 15 is installed on the right side of the third rotating ring 9. The first guide vane 13, the second guide vane 14, and the third guide vane 15 are in a specific inclined state, thus expanding when the fluid comes into contact with them. This guide vane guides and limits the rotational trajectories of the first rotating ring 5, the second rotating ring 7, and the third rotating ring 9, further promoting their rotational effect. By providing a spiral-shaped guide plate 16 before the fixed plate 4, a continuous and smooth transition curve can be provided. The guide plate 16 is designed to allow the fluid entering the jet pump body 1 to flow along its spiral surface without sharp impacts or leading-edge separation. This ensures that the fluid generates a uniform and stable swirling flow, and the swirling flow is aligned with the design rotation direction of the subsequent sawtooth ring. This reduces the resistance to driving the sawtooth ring to rotate, ensuring that the subsequent sawtooth ring can rotate more easily. By setting a flow stabilizing ring 17 after the third fixed ring 8 and by setting a minor disturbance flow rod 18, the interior of the flow stabilizing ring 17 is divided into multiple smaller spaces. This further breaks up the already small vortices coming out of the rotating sawtooth ring, improving the uniformity and stability of the fluid flow, thereby further suppressing vibration and cavitation.
[0034] The working principle of this energy-saving jet pump with a serrated air inlet is explained in detail below.
[0035] like Figures 1-8As shown, after the operator connects the working fluid inlet 2, the mixed fluid outlet 3, and the bottom air inlet to the external equipment, the working fluid enters the interior of the jet pump body 1 from the working fluid inlet 2. At this time, the guide plate 16 guides and limits the flow direction of the fluid, making it form a smooth and uniform flow trajectory. Then, the first guide vane 13 contacts the fluid and drives the first rotating ring 5 to rotate, so that the first sawtooth block 10 first breaks the large vortex formed by the fluid at the air inlet. The fluid then contacts the second guide vane 14, causing it to rotate, and then the second sawtooth block 11 breaks the fluid again. Finally, the third guide vane 15 contacts the fluid to promote the rotation of the third rotating ring 9, so that the third sawtooth block 12 breaks the fluid. Finally, the fluid passes through the flow stabilizing ring 17 and the turbulence rod 18, which further refines and breaks the small vortices, so that the mixed fluid is discharged from the mixed fluid outlet 3.
[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An energy-saving jet pump with a serrated air inlet, comprising a jet pump body (1), characterized in that: The jet pump body (1) has a working fluid inlet (2) on the right side and a mixed fluid outlet (3) on the left side. The jet pump body (1) has a first crushing component inside, a second crushing component on the left side of the first crushing component, and a third crushing component on the left side of the second crushing component. The first crushing component, the second crushing component, and the third crushing component are used to gradually crush the fluid inside the jet pump body (1).
2. The energy-saving jet pump with a serrated air inlet according to claim 1, characterized in that: The first crushing component includes a first fixed ring (4), which is fixedly connected to the inner wall of the jet pump body (1). A first rotating ring (5) is rotatably installed inside the first fixed ring (4) through a bearing. A plurality of first sawtooth blocks (10) are fixedly connected in the circumferential direction inside the first rotating ring (5). The second crushing component includes a second fixed ring (6), which is fixedly connected to the inner wall of the jet pump body (1). A second rotating ring (7) is rotatably installed inside the second fixed ring (6) through a bearing. Several second sawtooth blocks (11) are fixedly connected in the circumferential direction inside the second rotating ring (7). The third crushing component includes a third fixed ring (8), which is fixedly connected to the inner wall of the jet pump body (1). A third rotating ring (9) is rotatably installed inside the third fixed ring (8) through a bearing. Several third sawtooth blocks (12) are fixedly connected inside the third rotating ring (9) in a circumferential direction.
3. The energy-saving jet pump with a serrated air inlet according to claim 2, characterized in that: The number of the second sawtooth blocks (11) is less than the number of the first sawtooth blocks (10), and the spacing between any two second sawtooth blocks (11) located on the same horizontal line is greater than the spacing between any two first sawtooth blocks (10) located on the same horizontal line.
4. The energy-saving jet pump with a serrated air inlet according to claim 3, characterized in that: The number of the third sawtooth blocks (12) is less than the number of the second sawtooth blocks (11), and the spacing between any two third sawtooth blocks (12) located on the same horizontal line is greater than the spacing between any two second sawtooth blocks (11) located on the same horizontal line.
5. An energy-saving jet pump with a serrated air inlet according to claim 4, characterized in that: The first sawtooth block (10) has a wave-shaped first groove on both the left and right sides, the second sawtooth block (11) has a wave-shaped second groove on both the left and right sides, and the third sawtooth block (12) has a wave-shaped third groove on both the left and right sides.
6. The energy-saving jet pump with a serrated air inlet according to claim 2, characterized in that: A plurality of first guide vanes (13) are fixedly installed on the right side of the first rotating ring (5) in a circumferential direction, a plurality of second guide vanes (14) are fixedly installed on the right side of the second rotating ring (7) in a circumferential direction, and a plurality of third guide vanes (15) are fixedly installed on the right side of the third rotating ring (9) in a circumferential direction.
7. An energy-saving jet pump with a serrated air inlet according to claim 6, characterized in that: A guide plate (16) is fixedly installed inside the jet pump body (1) on the right side of the first fixing ring (4), and the guide plate (16) is spiral in shape.
8. An energy-saving jet pump with a serrated air inlet according to claim 7, characterized in that: A flow stabilizing ring (17) is fixedly installed inside the jet pump body (1) on the left side of the third fixed ring (8), and a few interference flow rods (18) are fixedly connected inside the flow stabilizing ring (17) in the circumferential direction.