A low-noise vertical mixed-flow pump

Abstract

The present invention discloses a low-noise vertical mixed-flow pump, which relates to the technical field of mixed-flow pumps and includes a discharge elbow. One end of the discharge elbow is fixedly connected to a pump casing, and one end of the pump casing away from the discharge elbow is fixedly connected to a bellmouth. The circumferential outer wall of the discharge elbow is fixedly connected to a sealing housing. A coupling is arranged on the top of the sealing housing. One end of the coupling is provided with a rotating column, and one end of the rotating column passes through the inside of the sealing housing. The end of the rotating column away from the coupling is fixedly connected to a hub, and the circumferential outer wall of the hub is fixedly connected with impellers distributed in a circular shape at equal distances. In the present invention, the first deflector and the second deflector are in the same bending direction as the discharge elbow, enabling the liquid to flow smoothly, avoiding violent impact and turbulence of the fluid due to sudden direction change or encountering obstacles, suppressing cavitation phenomena, reducing high-frequency noise, and improving the operation efficiency and stability of the mixed-flow pump.

Description

Technical Field

[0001] The present invention relates to the technical field of mixed-flow pumps, and particularly to a low-noise vertical mixed-flow pump. Background Art

[0002] A mixed-flow pump is a type of vane pump that combines the characteristics of a centrifugal pump and an axial-flow pump. It can generate a relatively high pressure like a centrifugal pump and has a relatively large flow rate like an axial-flow pump. The working principle of a mixed-flow pump lies between that of a centrifugal pump and an axial-flow pump. When the impeller rotates, the liquid is not only affected by the centrifugal force but also by the pushing action of the impeller blades, causing the flow direction of the liquid in the impeller to be oblique, having both a radial component and an axial component, thereby achieving the transportation and lifting of the liquid.

[0003] With the increasing social requirements for the environment and people's attention to the comfort of the working and living environment, the noise problem generated during the operation of mixed-flow pumps has gradually become a focus. Especially in densely populated urban areas and places with strict noise control, such as pump houses near hospitals, schools, and residential communities, the noise of mixed-flow pumps will cause serious interference to the surrounding environment. Noise not only affects people's normal rest, study, and work, but also may have an adverse impact on human health in a high-decibel noise environment for a long time, such as causing hearing loss, neurasthenia and other diseases.

[0004] At present, some manufacturers add sound insulation covers outside the pump body. Although it can block part of the noise transmission, the installation of the sound insulation cover not only increases the equipment cost and maintenance difficulty, but also affects the heat dissipation of the pump body, resulting in a decrease in the operating efficiency of the pump. Therefore, there is an urgent need for a low-noise vertical mixed-flow pump to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a low-noise vertical mixed-flow pump.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A low-noise vertical mixed-flow pump includes a discharge elbow. One end of the discharge elbow is fixedly connected to a pump casing. The end of the pump casing away from the discharge elbow is fixedly connected to a bellmouth. The circumferential outer wall of the discharge elbow is fixedly connected to a sealing shell. A coupling is arranged at the top of the sealing shell. One end of the coupling is provided with a rotating column. One end of the rotating column passes through the inside of the sealing shell. The end of the rotating column away from the coupling is fixedly connected to a hub. The circumferential outer wall of the hub is fixedly connected with impellers distributed in a circular shape at equal distances.

[0008] The inside of the pump casing is provided with a first noise reduction component and a second noise reduction component for reducing the noise generated during the operation of the mixed-flow pump.

[0009] Inside the pump housing, a power component for driving the first noise reduction component to work is provided.

[0010] A pump base is fixedly connected to the circumferential outer wall of the water outlet elbow.

[0011] The present invention is further configured such that the pump housing includes a vertical pipe, an arc-shaped pipe, and a spherical pipe, and the impeller is located inside the spherical pipe.

[0012] The present invention is further configured such that the first noise reduction component includes a reinforcing column fixedly connected to the circumferential inner wall of the vertical pipe. The other end of the reinforcing column is fixedly connected to a base. The cross-section of the base is semi-circular. A receiving housing is fixedly connected to the top outer wall of the base. The cross-section of the receiving housing is bullet-shaped. A first flow guide plate and a second flow guide plate are respectively arranged inside the receiving housing. First through grooves and second through grooves are formed in the circumferential outer wall of the receiving housing. The specification of the first through groove is adapted to the specification of the first flow guide plate, and the specification of the second through groove is adapted to the specification of the second flow guide plate.

[0013] The present invention is further configured such that the number of both the first flow guide plate and the second flow guide plate is four, and the first flow guide plate and the second flow guide plate are both in the same bending direction as the water outlet elbow.

[0014] The present invention is further configured such that the second noise reduction component includes sound absorption holes formed in the circumferential inner wall of the spherical pipe and distributed at equal intervals. The sound absorption holes include a semi-circular groove and an arc-shaped groove. The semi-circular groove communicates with the arc-shaped groove, and the arc-shaped groove is inclinedly formed on the circumferential inner wall of the spherical pipe.

[0015] The present invention is further configured such that the power component includes a fixing block fixedly connected to the circumferential outer wall of the rotating column. An installation plate is fixedly connected to the bottom of the fixing block. A ball head shaft is fixedly connected to the bottom of the installation plate. A ball head block is rotatably connected inside the ball head shaft. A connecting rod is fixedly connected to the circumferential outer wall of the ball head block. A counterweight ball is fixedly connected to the end of the connecting rod away from the ball head block.

[0016] The present invention is further configured such that the inside of the base is provided with adjusting plates distributed in a circular shape at equal intervals. The number of the adjusting plates is four. A rotating seat is fixedly connected to the circumferential outer wall of the connecting rod. A rotating head is rotatably connected inside the rotating seat. One end of the rotating head is fixedly connected to a connecting rod. The other end of the connecting rod away from the rotating head is rotatably connected to a rolling ball. A sliding groove is formed in the circumferential inner wall of the adjusting plate. The rolling ball is matched with the sliding groove. A vertical plate is fixedly connected to the top outer wall of the adjusting plate. The end of the vertical plate away from the adjusting plate is fixedly connected to the bottom outer wall of the first flow guide plate.

[0017] The present invention is further configured such that a gap is formed between the four adjusting plates, and the width of the gap is smaller than the diameter of the rolling ball.

[0018] The present invention is further configured such that circular holes are formed in the circumferential inner wall of the base, movable rods are fixedly connected to the circumferential outer walls of the adjusting plates, one ends of the movable rods pass through the interiors of the circular holes, and limiting blocks are fixedly connected to the ends of the movable rods away from the adjusting plates, and the diameter of the limiting blocks is larger than the inner diameter of the circular holes.

[0019] The present invention is further configured such that an arc-shaped column is fixedly connected to the top outer wall of the adjusting plate, the other end of the arc-shaped column is fixedly connected to the second flow guide plate, and the second flow guide plate is closer to the rotating column than the first flow guide plate.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. For a low-noise vertical mixed-flow pump, by providing a pump casing, when an external motor is started, the rotating column is driven to rotate through a coupling, and then the hub and the impeller rotate together to transport and lift the liquid. During this process, the impeller is located inside the spherical pipe. The spherical pipe can reflect the sound waves generated during the liquid transportation of the mixed-flow pump multiple times, and the dispersed reflection mode allows the sound wave energies to interfere and cancel each other, reducing the noise intensity transmitted outward. At the same time, its arc-shaped structure guides the liquid to flow more smoothly around the impeller, making the liquid flow velocity and pressure distribution uniform, and reducing the noise generated due to unstable flow. In addition, the sound-absorbing holes on the circumferential inner wall of the spherical pipe can allow the sound waves to enter and resonate with the air columns in the holes, converting the sound energy into heat energy, weakening the sound wave intensity transmitted out of the pump casing, destroying the conditions for specular reflection of the sound waves, increasing the propagation path and attenuation degree, and reducing the noise inside the pump and transmitted outward. Moreover, the first flow guide plate and the second flow guide plate have the same bending direction as the outlet elbow, enabling the liquid to flow smoothly, avoiding violent impact and turbulence of the fluid due to sudden direction changes or encountering obstacles, suppressing the cavitation phenomenon, reducing high-frequency noise, and improving the operation efficiency and stability of the mixed-flow pump.

[0022] 2. For a low-noise vertical mixed-flow pump, by providing a second noise reduction component, when the mixed-flow pump transports and lifts the liquid, the liquid impacts the sound-absorbing holes, and the impurities therein will be blocked by the semi-circular grooves, thereby simply collecting the impurities in the liquid and preventing the impurities from generating noise by rubbing against the inner wall of the outlet elbow during subsequent transportation. Moreover, the inclined arc-shaped grooves can quickly discharge the impurities deposited in the semi-circular grooves, facilitating the cleaning of the mixed-flow pump by the staff.

[0023] 3. A low-noise vertical mixed-flow pump is provided with a first noise reduction component and a power component. When the rotating column rotates, it drives the counterweight ball to rotate. The centrifugal force generated by the counterweight ball causes it to drive the connecting rod to open. Then, through the rolling ball, a thrust is applied to the adjusting plate, spreading out four groups of adjusting plates, so that the first deflector plate moves out of the storage shell to guide and convey the water flow. When the pumping power of the mixed-flow pump is increased, the centrifugal force of the counterweight ball increases, and the spreading thrust of the rolling ball on the adjusting plate also increases. The first deflector plate continues to spread outwards, driving the second deflector plate to move out of the storage shell. This process realizes the automatic adjustment of the number of deflector plates according to the pumping power of the pump, avoiding the situation that too many deflector plates affect the conveying capacity and head when the power is low, or too few deflector plates cause excessive noise when the power is high. Moreover, the bending directions of the first deflector plate and the second deflector plate are the same as the bending direction of the outlet elbow pipe. Therefore, the liquid can flow smoothly along the curved surfaces of the deflector plate and the pump shell, avoiding violent impacts and turbulences caused by sudden changes in direction or encountering obstacles during the fluid flow process. The weakening of the fluid impact directly reduces the noise generated by the impact, and also helps to optimize the fluid flow state in the pump, reduce local pressure fluctuations, thereby reducing the occurrence of cavitation phenomena. Cavitation generates high-frequency noise, and by suppressing cavitation, this part of the noise can be effectively reduced, improving the operation efficiency and stability of the mixed-flow pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 6 is a schematic front view of the overall structure of a low-noise vertical mixed-flow pump according to the present invention;

[0025] Figure 2 FIG. 7 is a schematic half-sectional view of the overall structure of a low-noise vertical mixed-flow pump according to the present invention;

[0026] Figure 3 FIG. 8 is a schematic front view of a low-noise vertical mixed-flow pump according to the present invention Figure 2 and an enlarged schematic view of the structure at A in FIG. 8;

[0027] Figure 4 FIG. 9 is a schematic half-sectional plan view of the overall structure of a low-noise vertical mixed-flow pump according to the present invention;

[0028] Figure 5 FIG. 10 is a schematic front view of a low-noise vertical mixed-flow pump according to the present invention Figure 4 and an enlarged schematic view of the structure at B in FIG. 10;

[0029] Figure 6 FIG. 11 is a schematic front view of the storage shell of a low-noise vertical mixed-flow pump according to the present invention;

[0030] Figure 7 FIG. 12 is a schematic top view of the storage shell of a low-noise vertical mixed-flow pump according to the present invention;

[0031] Figure 8Schematic diagram of the internal structure splitting of the storage shell of a low-noise vertical mixed-flow pump proposed by the present invention;

[0032] Figure 9 Schematic diagram of the bottom structures of the first guide plate and the second guide plate of a low-noise vertical mixed-flow pump proposed by the present invention.

[0033] In the figure: 1, water outlet elbow; 2, pump base; 3, pump shell; 3001, vertical pipe; 3002, arc pipe; 3003, spherical pipe; 4, bellmouth; 5, seal housing; 6, coupling; 7, rotating column; 8, sound absorption hole; 8001, semi-circular groove; 8002, arc groove; 9, hub; 10, impeller; 11, base; 12, storage shell; 13, first through groove; 14, first guide plate; 15, limit block; 16, round hole; 17, movable rod; 18, fixed block; 19, mounting plate; 20, ball head shaft; 21, ball head block; 22, connecting rod; 23, counterweight ball; 24, rotating seat; 25, adjusting plate; 26, rotating head; 27, connecting rod; 28, rolling ball; 29, chute; 30, strengthening column; 31, second through groove; 32, second guide plate; 33, vertical plate; 34, arc column. Detailed implementation manners

[0034] The technical solutions of this patent will be further described in detail below in conjunction with the specific implementation manners.

[0035] The embodiments of this patent are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0036] In the description of this patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0037] In the description of this patent, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0038] Refer toFigures 1-9 , a low-noise vertical mixed-flow pump, comprising a discharge elbow 1, one end of the discharge elbow 1 is fixedly connected to a pump casing 3, the end of the pump casing 3 remote from the discharge elbow 1 is fixedly connected to a bellmouth 4, the circumferential outer wall of the discharge elbow 1 is fixedly connected to a sealing casing 5, a coupling 6 is arranged on the top of the sealing casing 5, one end of the coupling 6 is provided with a rotating column 7, one end of the rotating column 7 passes through the inside of the sealing casing 5, and the end of the rotating column 7 remote from the coupling 6 is fixedly connected to a hub 9, and equally spaced circularly distributed impellers 10 are fixedly connected to the circumferential outer wall of the hub 9;

[0039] A first noise reduction component and a second noise reduction component for reducing the noise generated during the operation of the mixed-flow pump are arranged inside the pump casing 3;

[0040] A power component for driving the first noise reduction component to work is arranged inside the pump casing 3;

[0041] A pump base 2 is fixedly connected to the circumferential outer wall of the discharge elbow 1, which can achieve secondary noise reduction during the operation of the mixed-flow pump, avoiding the situation that the serious noise generated during the operation of the mixed-flow pump causes serious interference to the surrounding environment.

[0042] Specifically, the pump casing 3 includes a vertical pipe 3001, an arc pipe 3002 and a spherical pipe 3003. The impeller 10 is located inside the spherical pipe 3003. The special structural design of the pump casing 3 plays an important role in reducing noise. When the mixed-flow pump conveys liquid, sound waves are reflected multiple times inside the spherical pipe 3003. The dispersed reflection mode enables the sound wave energy to interfere and cancel each other, reducing the noise intensity transmitted outward. It guides the liquid to flow more smoothly around the impeller 10, making the liquid flow velocity and pressure distribution uniform, reducing the noise generated by unstable flow. At the same time, when the sound wave enters the sound absorption hole 8, it resonates with the air column in the hole, converting the sound energy into heat energy, weakening the sound wave intensity transmitted out of the pump casing 3, destroying the condition of specular reflection of the sound wave, increasing the propagation path and attenuation degree, and reducing the noise inside the pump and transmitted outward.

[0043] Specifically, the first noise reduction component includes a reinforcing column 30 fixedly connected to the circumferential inner wall of the vertical pipe 3001. The other end of the reinforcing column 30 is fixedly connected to a base 11. The cross-section of the base 11 is semi-circular. A storage shell 12 is fixedly connected to the top outer wall of the base 11. The cross-section of the storage shell 12 is bullet-shaped. A first guide plate 14 and a second guide plate 32 are respectively arranged inside the storage shell 12. First through grooves 13 and second through grooves 31 are formed in the circumferential outer wall of the storage shell 12. The specifications of the first through grooves 13 are adapted to the specifications of the first guide plate 14, and the specifications of the second through grooves 31 are adapted to the specifications of the second guide plate 32. During the operation of the mixed-flow pump, when the liquid flows through here, the guide plates guide the liquid to flow smoothly, avoiding the violent impact and turbulence of the fluid caused by sudden changes in direction or encountering obstacles, suppressing the cavitation phenomenon, reducing the high-frequency noise, and improving the operation efficiency and stability of the mixed-flow pump.

[0044] Specifically, the number of the first deflector plates 14 and the second deflector plates 32 is four each. The first deflector plates 14 and the second deflector plates 32 are both in the same bending direction as the outlet elbow 1. The first deflector plates 14 and the second deflector plates 32 inside the receiving shell 12 are arranged alternately. The design that the first deflector plates 14 and the second deflector plates 32 are in the same bending direction as the outlet elbow 1 enables the liquid to flow along a reasonable path. When the liquid flows out from the impeller 10, it enters the pump casing 3. The first deflector plates 14 and the second deflector plates 32 guide the liquid to flow towards the outlet elbow 1, reducing the impact and turbulence of the liquid in the pump, further reducing the generation of noise, and at the same time optimizing the flow state of the fluid in the pump and improving the performance of the mixed-flow pump.

[0045] Specifically, the second noise reduction component includes sound-absorbing holes 8 that are equidistantly distributed on the circumferential inner wall of the spherical pipe 3003. The sound-absorbing holes 8 include semi-circular grooves 8001 and arc-shaped grooves 8002. The semi-circular grooves 8001 are communicated with the arc-shaped grooves 8002. The arc-shaped grooves 8002 are inclinedly arranged on the circumferential inner wall of the spherical pipe 3003. When the mixed-flow pump conveys and lifts the liquid, the liquid impacts the sound-absorbing holes 8. The semi-circular grooves 8001 block the impurities in the liquid, preventing the impurities from rubbing against the inner wall of the outlet elbow 1 during subsequent conveyance to generate noise. The inclined arc-shaped grooves 8002 enable the impurities deposited in the semi-circular grooves 8001 to be quickly discharged, facilitating the cleaning of the mixed-flow pump by the staff.

[0046] Specifically, the power component includes a fixing block 18 fixedly connected to the circumferential outer wall of the rotating column 7. The bottom of the fixing block 18 is fixedly connected with a mounting plate 19. The bottom of the mounting plate 19 is fixedly connected with a ball head shaft 20. The inside of the ball head shaft 20 is rotatably connected with a ball head block 21. The circumferential outer wall of the ball head block 21 is fixedly connected with a connecting rod 22. One end of the connecting rod 22 far from the ball head block 21 is fixedly connected with a counterweight ball 23. When the rotating column 7 rotates, the counterweight ball 23 rotates to generate a centrifugal force, driving the connecting rod 22 to open, providing a power source for the subsequent normal operation of the second noise reduction component.

[0047] Specifically, the interior of the base 11 is provided with adjusting plates 25 which are equidistantly distributed in a circle, and the number of the adjusting plates 25 is four. The circumferential outer wall of the connecting rod 22 is fixedly connected with a rotating seat 24, and the interior of the rotating seat 24 is rotatably connected with a rotating head 26, and one end of the rotating head 26 is fixedly connected with a connecting rod 27, and the end of the connecting rod 27 away from the rotating head 26 is rotatably connected with a rolling ball 28. A chute 29 is provided on the circumferential inner wall of the adjusting plate 25, and the rolling ball 28 cooperates with the chute 29. The top outer wall of the adjusting plate 25 is fixedly connected with a vertical plate 33, and one end of the vertical plate 33 away from the adjusting plate 25 is fixedly connected to the bottom outer wall of the first guide plate 14. When the counterweight ball 23 drives the connecting rod 22 to open, the rolling ball 28 slides in the chute 29, and the adjusting plate 25 is stretched open, so that the first guide plate 14 is moved out of the storage shell 12 to guide and transport the water flow.

[0048] Specifically, a gap is formed between the four adjustment plates 25, and the width of the gap is smaller than the diameter of the rolling ball 28, ensuring that when the rolling ball 28 opens the adjustment plates 25, the adjustment plates 25 can be stably stressed and the rolling ball 28 will not slip due to excessive gaps, thereby ensuring that the first guide plate 14 can be stably moved out of the storage shell 12 and guide the water flow.

[0049] Specifically, a circular hole 16 is opened on the circumferential inner wall of the base 11, and a movable rod 17 is fixedly connected to the circumferential outer wall of the adjustment plate 25. One end of the movable rod 17 passes through the inside of the circular hole 16, and the end of the movable rod 17 away from the adjustment plate 25 is fixedly connected to the limiting block 15. The diameter of the limiting block 15 is larger than the inner diameter of the circular hole 16, which limits the movement range of the adjustment plate 25 and prevents the adjustment plate 25 from excessively moving away from the base 11, thereby ensuring the stability of the first guide plate 14 and the second guide plate 32 during the adjustment process.

[0050] Specifically, the top outer wall of the adjustment plate 25 is fixedly connected with an arc column 34, and the other end of the arc column 34 is fixedly connected to the second guide plate 32. The second guide plate 32 is closer to the rotating column 7 than the first guide plate 14. When the first guide plate 14 is diffused outward to a certain extent by the thrust of the rolling ball 28, the second guide plate 32 is driven to move out of the storage shell 12, so that the number of guide plates is automatically adjusted according to the pumping power of the pump, so as to avoid the situation where too many guide plates affect the delivery volume and lift when the power is low, or too many guide plates are insufficient when the power is high, resulting in excessive noise. The guide plates guide the liquid to flow smoothly and reduce noise.

[0051] Working principle: When in use, after fixedly connecting the coupling 6 with an external motor, starting the motor can drive the rotating column 7 to rotate. Further, the hub 9 and the impeller 10 at the bottom end of the rotating column 7 can rotate together to achieve the transportation and lifting of the liquid. During the rotation of the impeller 10, since the impeller 10 is arranged in the spherical tube 3003 area of the pump casing 3, the sound waves generated during the liquid transportation process by the mixed-flow pump can be reflected multiple times at different angles through the spherical tube 3003, avoiding the formation of high-intensity reflected noise due to concentrated reflection. The scattered reflection mode allows the sound wave energy to interfere with and cancel each other, reducing the noise intensity transmitted outward. At the same time, the inner walls of the spherical tube 3003 are all arc-shaped structures, which can guide the liquid to flow more smoothly around the impeller 10, making the flow velocity and pressure distribution more uniform when the liquid enters and leaves the impeller 10, reducing the turbulent flow and vortex phenomena, and reducing the noise generated due to unstable liquid flow. Moreover, the circumferential inner wall of the spherical tube 3003 is also provided with sound-absorbing holes 8 arranged in an equidistant circular distribution. Through the sound-absorbing holes 8, the sound waves can enter the holes, and by resonating with the air column in the holes, the sound energy is converted into heat energy, weakening the intensity of the sound waves transmitted out of the pump casing 3. It has a significant effect on suppressing high-frequency noise, and the sound-absorbing holes 8 destroy the conditions for specular reflection of the sound waves, prompting the sound waves to be reflected multiple times between the holes and between the holes and the wall of the pump casing 3, increasing the propagation path and attenuation degree, reducing the noise inside the pump casing 3 and the intensity transmitted outward, thus achieving the first-stage noise reduction of the entire mixed-flow pump;

[0052] And during the process of the mixed-flow pump transporting and lifting the liquid, when the liquid impacts the sound-absorbing holes 8, the impurities contained in the liquid will be blocked by the semi-circular groove 8001. Through the semi-circular groove 8001, the impurities in the suction liquid can be simply blocked and collected, avoiding the situation that during the subsequent liquid suction process, the impurities follow the liquid to be transported and rub against the inner wall of the outlet elbow 1 to generate noise. Moreover, the inclined arc-shaped groove 8002 can facilitate the rapid discharge of the impurities deposited in the semi-circular groove 8001, facilitating the cleaning work of the staff for the entire mixed-flow pump;

[0053] When the rotating column 7 rotates, it can drive the counterweight ball 23 to rotate together. During the rotation process, the counterweight ball 23 will generate centrifugal force, which causes the counterweight ball 23 to drive the connecting rod 22 to open together (i.e., spread around the rotating column 7). When the connecting rod 22 opens, the centrifugal force will act on the connecting rod 27 and the rolling ball 28. At this time, the rolling ball 28 will receive a spreading thrust, and through the rolling ball 28, the spreading thrust can act on the adjusting plate 25, so that the four groups of adjusting plates 25 can be quickly expanded. At the same time, the adjusting plate 25 is fixedly connected to the first guide plate 14 through the vertical plate 33. When the adjusting plate 25 is expanded to a certain distance, the four guide plates will all move out of the storage shell 12 to guide and convey the water flow inside the entire pump body. When the staff increases the pumping power of the mixed-flow pump, the centrifugal force received by the counterweight ball 23 will increase again, so that the spreading thrust acting on the adjusting plate 25 by the rolling ball 28 also increases again. At this time, the first guide plate 14 will continue to spread outwards. At the same time, when the first guide plate 14 spreads to a certain distance, it can drive the second guide plates 32 on both sides of it to move out of the storage shell 12, increasing the number of guide plates, avoiding the situation that the noise increases significantly when the pump body increases the conveying power, completing the secondary noise reduction of the pump body, and also realizing the automatic adjustment of different numbers of guide plates of the pump body at high and low powers, avoiding the situation that when the power is low, the large number of guide plates affects its conveying capacity and head, or when the power is high, the insufficient number of guide plates leads to excessive noise. Moreover, the bending directions of the first guide plate 14 and the second guide plate 32 are the same as the bending direction of the outlet elbow 1, so that the liquid can flow smoothly along the curved surfaces of the guide plates and the pump casing 3, avoiding violent impact and turbulence caused by sudden changes in the direction of the fluid during the flow process or encountering obstacles. The reduction of fluid impact directly reduces the noise generated by the impact, and also helps to optimize the flow state of the fluid in the pump, reduce local pressure fluctuations, and thus reduce the occurrence of cavitation phenomenon. Cavitation will generate high-frequency noise, and by suppressing cavitation, this part of the noise can be effectively reduced, improving the operation efficiency and stability of the mixed-flow pump.

[0054] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered within the protection scope of the present invention.

Claims

1. A low-noise vertical mixed-flow pump, comprising a water outlet elbow (1), characterized in that: One end of the outlet elbow (1) is fixedly connected to a pump casing (3), one end of the pump casing (3) away from the outlet elbow (1) is fixedly connected to a bell tube (4), the circumferential outer wall of the outlet elbow (1) is fixedly connected to a sealing casing (5), a coupling (6) is provided on the top of the sealing casing (5), a rotating column (7) is provided at one end of the coupling (6), one end of the rotating column (7) passes through the interior of the sealing casing (5), one end of the rotating column (7) away from the coupling (6) is fixedly connected to a wheel hub (9), and the circumferential outer wall of the wheel hub (9) is fixedly connected to impellers (10) distributed in a circular shape and at equal distances; The pump housing (3) is provided with a first noise reduction component and a second noise reduction component for reducing the noise of the mixed flow pump when it is working; A power component for driving the first noise reduction component to work is arranged inside the pump housing (3); The circumferential outer wall of the outlet elbow (1) is fixedly connected to a pump seat (2); the pump housing (3) comprises a vertical pipe (3001), an arc-shaped pipe (3002) and a spherical pipe (3003); the impeller (10) is located inside the spherical pipe (3003); the first noise reduction component comprises a reinforcing column (30) fixedly connected to the circumferential inner wall of the vertical pipe (3001); the other end of the reinforcing column (30) is fixedly connected to a base (11); the cross section of the base (11) is semicircular; the top outer wall of the base (11) is fixedly connected to a storage shell (12); the storage shell The cross section of the storage shell (12) is in the shape of a bullet head. The interior of the storage shell (12) is respectively provided with a first guide plate (14) and a second guide plate (32). The circumferential outer wall of the storage shell (12) is provided with a first through groove (13) and a second through groove (31). The specification of the first through groove (13) is compatible with the specification of the first guide plate (14). The specification of the second through groove (31) is compatible with the specification of the second guide plate (32). The power assembly comprises a fixed block (18) fixedly connected to the circumferential outer wall of the rotating column (7). The bottom of the fixed block (18) is fixedly connected to the rotating column (7). A mounting plate (19) is connected, the bottom of the mounting plate (19) is fixedly connected to a ball head shaft (20), the inside of the ball head shaft (20) is rotatably connected to a ball head block (21), the circumferential outer wall of the ball head block (21) is fixedly connected to a connecting rod (22), one end of the connecting rod (22) away from the ball head block (21) is fixedly connected to a counterweight ball (23), the inside of the base (11) is provided with adjustment plates (25) distributed in a circular shape at equal distances, the number of the adjustment plates (25) is four, the circumferential outer wall of the connecting rod (22) is fixedly connected to a rotating seat (24), the A rotating head (26) is rotatably connected inside the rotating seat (24), one end of the rotating head (26) is fixedly connected to a connecting rod (27), one end of the connecting rod (27) away from the rotating head (26) is rotatably connected to a rolling ball (28), a slidable groove (29) is provided on the circumferential inner wall of the adjusting plate (25), the rolling ball (28) cooperates with the slidable groove (29), a vertical plate (33) is fixedly connected to the top outer wall of the adjusting plate (25), and one end of the vertical plate (33) away from the adjusting plate (25) is fixedly connected to the bottom outer wall of the first guide plate (14).

2. A low-noise vertical mixed flow pump according to claim 1, characterized in that: The number of the first guide plates (14) and the number of the second guide plates (32) are both four, and the bending direction of the first guide plates (14) and the second guide plates (32) is the same as that of the water outlet elbow (1).

3. A low noise vertical mixed flow pump according to claim 2, characterized in that: The second noise reduction component comprises silencing holes (8) which are arranged at equal distances on the circumferential inner wall of the spherical tube (3003); the silencing holes (8) comprise a semicircular groove (8001) and an arcuate groove (8002); the semicircular groove (8001) is connected to the arcuate groove (8002); and the arcuate groove (8002) is arranged at an angle on the circumferential inner wall of the spherical tube (3003).

4. A low-noise vertical mixed flow pump according to claim 3, characterized in that: Gaps are formed between the four adjustment plates (25), and the width of the gaps is smaller than the diameter of the rolling balls (28).

5. A low-noise vertical mixed flow pump according to claim 4, characterized in that: A circular hole (16) is formed on the circumferential inner wall of the base (11); a movable rod (17) is fixedly connected to the circumferential outer wall of the adjustment plate (25); one end of the movable rod (17) passes through the inside of the circular hole (16); one end of the movable rod (17) away from the adjustment plate (25) is fixedly connected to a limit block (15); and the diameter of the limit block (15) is greater than the inner diameter of the circular hole (16).

6. A low-noise vertical mixed flow pump according to claim 5, characterized in that: An arc column (34) is fixedly connected to the top outer wall of the adjustment plate (25), and the other end of the arc column (34) is fixedly connected to the second guide plate (32), and the second guide plate (32) is closer to the rotating column (7) than the first guide plate (14).

Images