Large-flow booster pump convenient to connect in series

Abstract

The invention discloses a large-flow booster pump convenient to connect in series. The large-flow booster pump comprises a motor shell, a hydraulic component, a motor component, a water outlet series connection shell, a water inlet series connection shell, a rotary supporting component and a positive pressure airtight system. A first mounting cavity for mounting the motor component is formed in the motor shell and is used for providing power for the hydraulic component. The water outlet tandem connection shell is installed at the water outlet end of the motor shell, the water inlet tandem connection shell is installed at the water inlet end of the motor shell, and a second installation cavity communicated with the first installation cavity is formed among the outer wall of the motor shell, the inner wall of the water inlet tandem connection shell and the outer wall of the hydraulic component. The rotary supporting component is arranged in the first mounting cavity and / or the second mounting cavity and used for axially and / or radially supporting the hydraulic component. And the positive pressure airtight system is used for filling compressed air with atomized lubricating oil into the first mounting cavity and the second mounting cavity to form positive pressure sealing. Cascade connection can be achieved without additionally arranging a sealing cylinder, the overall weight is light, and carrying is convenient.

Description

Technical Field

[0001] The present application relates to the field of emergency drainage, and in particular to a high-flow booster pump that is easy to connect in series. Background Art

[0002] In the related art, the patent with publication number CN220036972U discloses a drainage relay device, including a submersible pump and a shell assembly, the shell assembly includes a first cylinder and a second cylinder, the second cylinder is detachably connected to the first cylinder by a connecting clamp; the shell assembly can be connected to the outlet of the previous drainage relay device or the main water pump, and the water flow entering the circulation channel from the external water inlet enters the submersible pump from the water inlet of the submersible pump under the action of the submersible pump, and flows into the next drainage relay device or is discharged through the water outlet of the submersible pump to achieve drainage and smooth discharge of the water flow. The first cylinder and the second cylinder are detachably connected by a connecting clamp, which facilitates the disassembly and assembly of the submersible pump. The utility model also provides a relay drainage system, including the above-mentioned drainage relay device, the drainage relay device is convenient to disassemble and assemble, saves operation time, is conducive to improving the drainage efficiency of the relay drainage system, and enhances the emergency drainage effect.

[0003] In the above scheme, multiple booster pumps need to be connected in series to achieve high flow and high lift. The large-flow electric booster pump used is generally an axial flow pump with a sealing tube on the outside. The sealing tube needs to wrap the entire motor inside and the cable has to be left outside, which makes the sealing complicated. The entire motor becomes a fluid resistance in the water channel, which reduces the overall efficiency. Moreover, the water pump motor itself is large in size, and the addition of a large sealing tube makes the entire device very bulky, which is not convenient for rapid transportation and serial connection during emergency rescue. Summary of the invention

[0004] The present application provides a large-flow booster pump that is easy to connect in series and can be connected in series without the need for an additional sealing tube. The pump is light in overall weight and easy to carry.

[0005] The present application provides a high-flow booster pump that is easy to connect in series and adopts the following technical solution: A large flow booster pump that is easy to connect in series, comprising: Motor housing; A hydraulic component is rotatably connected to the motor housing, and a first installation cavity is provided between the outer wall of the hydraulic component and the inner wall of the motor housing; A motor component, disposed in the first mounting cavity, for providing power to the hydraulic component; The water outlet is connected in series with the housing and can be detachably mounted on the water outlet end of the motor housing. A first sealing member is provided at the connection between the water outlet, the housing, the hydraulic component and the motor housing; The water inlet is connected in series with the housing, and can be detachably mounted on the water inlet end of the motor housing. A second installation cavity is provided between the outer wall of the motor housing, the inner wall of the water inlet is connected in series with the housing, and the outer wall of the hydraulic component. The second installation cavity is communicated with the first installation cavity. A second sealing member for isolating the second installation cavity from the external environment is provided between the water inlet is connected in series with the housing and the hydraulic component. A rotation support component is disposed in the first installation cavity and / or the second installation cavity, and the rotation support component is used to provide axial and / or radial support to the hydraulic component; A positive pressure airtight system is connected to the first installation cavity and the second installation cavity, and is used to fill the first installation cavity and the second installation cavity with compressed air containing atomized lubricating oil to form a positive pressure seal for the first installation cavity and the second installation cavity.

[0006] By adopting the above technical solution, the first installation cavity and the second installation cavity formed between the motor housing and the hydraulic component not only provide sufficient space to accommodate the motor component and the rotating support component, but also ensure the internal sealing and lubricity through the positive pressure airtight system, making the overall structure more compact. The first seal and the second seal are respectively installed at the connection between the water outlet serial shell and the water inlet serial shell, which effectively isolates the external environment, prevents moisture from invading, and improves the sealing performance of the system. The hydraulic component is rotatably connected to the motor housing, and the design of the water outlet serial shell and the water inlet serial shell reduces the resistance in the water flow path and improves the working efficiency of the pump. The water outlet serial shell and the water inlet serial shell are both detachable designs, which are convenient for maintenance and replacement when necessary, and improve the reliability and service life of the equipment. The detachable design of the water outlet serial shell and the water inlet serial shell allows multiple booster pumps to be easily connected in series, improving the flexibility and adaptability of emergency drainage. The positive pressure airtight system forms a positive pressure seal by filling the first installation cavity and the second installation cavity with compressed air containing atomized lubricating oil. Even if the seal is worn, it can effectively prevent water from penetrating, while ensuring good lubrication of internal components and extending the service life of the equipment. In summary, since the motor is outside the hydraulic component and water flows in the middle, there is no need to consider the sealing of the cables when connecting in series. There is no shaft in the middle, and no additional sealing cylinder is required to achieve series connection. The overall weight is light and easy to carry.

[0007] Optionally, the side edge of the water inlet end of the hydraulic component extends outward to form an axial support portion, and the rotating support component includes an axial support bearing, which is installed on the inner wall of the water inlet serial shell and is located in the second installation cavity, and the axial support portion is abutted against the axial support bearing, and the second seal is clamped between the inner wall of the water inlet serial shell, the side edge of the hydraulic component and the axial support portion.

[0008] By adopting the above technical solution, the design effectively improves the axial stability of the hydraulic components and reduces axial vibration, while ensuring good sealing performance to prevent water from entering the first installation cavity and the second installation cavity, thereby improving the reliability and service life of the overall equipment.

[0009] Optionally, the rotating support component includes multiple groups of radial support bearings, which are installed on the motor housing, one group of radial support bearings abuts against the outer wall of the axial support part and is arranged close to the second seal, and the other group of radial support bearings abuts against the outer wall of the hydraulic component and is arranged close to the first seal.

[0010] By adopting the above technical solution, the setting of the radial support bearing can effectively reduce the radial vibration of the hydraulic component during operation, and improve the stability and service life of the equipment. At the same time, the radial support bearings at different positions are respectively abutted against the axial support part and the outer wall of the hydraulic component, ensuring the support strength of the hydraulic component in all directions, and further improving the reliability and bearing capacity of the overall structure. In addition, this design can also effectively prevent the hydraulic component from being offset under the action of high-pressure water flow, ensuring the smooth flow of the water channel and the pumping efficiency. In addition, from the distribution concentration of the oil mist, the amount of oil mist consumed at the radial support bearing will be relatively large. At this time, it is easy to guide the oil mist in the first installation cavity or the second installation cavity to the radial support bearing, and then to the connection gap between the motor housing and the hydraulic component, so that the amount of oil at the connection gap is more sufficient, which enhances the lubrication effect and improves the transmission efficiency between the hydraulic component and the motor housing.

[0011] Optionally, a plurality of the axial support bearings and the radial support bearings are arranged along the circumference of the hydraulic component, and the axial support bearings and the radial support bearings are staggered along the radial direction of the hydraulic component.

[0012] By adopting the above technical solution, multiple axial support bearings and radial support bearings are arranged along the circumference of the hydraulic component, which can effectively disperse the support force, reduce the problem of excessive force on a single point, and improve the stability and reliability of the overall structure. At the same time, the axial support bearings and radial support bearings are arranged in a radially staggered manner along the hydraulic component, which can further optimize the support layout and avoid local stress concentration caused by overlapping support points, thereby ensuring the stability and low vibration of the hydraulic component during high-speed operation and extending the service life of the equipment.

[0013] Optionally, a seal installation groove is formed between the motor housing and the hydraulic component, the first seal is installed in the seal installation groove and one end of the first seal extends to cover the end side of the hydraulic component, and the end side of the water outlet serially connected to the outer shell abuts against the side of the first seal facing away from the seal installation groove.

[0014] By adopting the above technical solution, the sealing path is extended, the sealing effect is improved, and at the same time, the contact area is increased, thereby improving the fixing effect of the first sealing member.

[0015] Optionally, the motor housing is connected to a cable, the cable is connected to the first installation cavity, the cable is electrically connected to the motor component, an air pipe is installed in the cable, one end of the air pipe is connected to the first installation cavity, and the other end of the air pipe is connected to the positive pressure airtight system.

[0016] By adopting the above technical solution, not only the normal power supply of the motor components is ensured, but also compressed air with atomized lubricating oil is delivered to the first installation cavity through the air pipe to maintain a positive pressure sealing state, effectively preventing moisture from entering the motor housing, and improving the reliability and service life of the motor. At the same time, this design simplifies the sealing structure, reduces the use of traditional sealing cylinders, reduces the overall weight, facilitates handling and serial connection, and improves the efficiency of emergency drainage.

[0017] Optionally, the water outlet is connected in series with the inner wall of the shell and is fixedly connected with a flow-fixing blade.

[0018] By adopting the above technical solution, the water outlet is connected in series with the inner wall of the shell and fixedly connected with the flow-fixing blade, which can effectively guide the direction of water flow, reduce the turbulence and loss of water flow at the water outlet, thereby improving the overall efficiency of the pump. At the same time, the design of the flow-fixing blade can also enhance the stability of the water flow, reduce vibration and noise, and improve the operating reliability of the equipment.

[0019] Optionally, the hydraulic component includes an impeller cylinder and a guide vane fixedly connected to the inner wall of the impeller cylinder, the guide vane includes a first conical hollow head and a first blade fixed to the outer wall of the first conical hollow head, the first blade is fixed to the inner wall of the impeller cylinder, and the conical end of the first conical hollow head faces the water inlet, the fixed flow vane includes a second conical hollow head and a second blade fixed to the outer wall of the second conical hollow head, the second blade is fixed to the inner wall of the outer shell in series with the water outlet, and the conical end of the second conical hollow head faces the water outlet, and the first conical hollow head and the second conical hollow head have movably docked cavities.

[0020] By adopting the above technical solution, the design of the guide vanes makes the water flow in the impeller tube smoother, reduces turbulence and eddy currents, and improves hydraulic efficiency; at the same time, the movable docking design of the first conical hollow head and the second conical hollow head not only simplifies the structure and reduces the weight, but also enhances the guidance and stability of the water flow, further improving the overall performance of the pump.

[0021] Optionally, the motor housing includes a first shell and a first bracket detachably connected to the first shell, the first bracket is located in a cavity formed by the water inlet serial shell and the first shell, and the rotating support component can be installed on the first bracket.

[0022] By adopting the above technical solution, the rotating support component can be first installed on the first bracket, and then the first bracket can be installed on the first shell, which simplifies the installation process of the rotating support component, enhances the convenience of assembly and maintenance, further improves the compactness and stability of the structure, reduces space occupancy, and makes the overall device lighter, easier to carry and quickly connected in series.

[0023] Optionally, the motor component includes a stator, a motor coil and a rotor, the stator and the motor coil are installed on the inner wall of the motor housing, the rotor is fixed to the outer wall of the hydraulic component, and the rotor and the stator are arranged relative to each other.

[0024] By adopting the above technical solution, the rotor and the stator are in the atomized lubricating oil cavity, the resistance between the rotor and the stator is small, and the motor efficiency is high.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adopting a highly integrated rim pump design, there is no shaft in the middle and no need for an additional sealing cylinder, which reduces fluid resistance and improves overall efficiency; 2. The seal plus air positive pressure waterproof method is adopted to ensure that the motor will not be flooded during long-term operation, thus improving the reliability and safety of the system; 3. The lightweight design reduces the weight of the entire device, making it easier to carry and connect in series during emergency rescue operations, thereby improving the efficiency and response speed of emergency drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the overall structure of the embodiment of the present application.

[0027] Figure 2 yes Figure 1 Sectional view along line AA.

[0028] Figure 3 It is a schematic diagram of the structure of the embodiment of the present application mainly showing the rotating support component.

[0029] Figure 4 yes Figure 2 Schematic diagram of the enlarged portion B.

[0030] Figure 5 yes Figure 1 Cross-sectional view along line CC.

[0031] Description of reference numerals: 10. Motor housing; 101. First housing; 102. First bracket; 11. First installation cavity; 12. Second installation cavity; 20. Hydraulic component; 201. Impeller cylinder; 202. Guide vane; 203. Axial support; 204. First conical hollow head; 205. First blade; 30. Motor component; 301. Stator; 302. Motor coil; 303. Rotor; 40. Water outlet connected in series with housing; 41. Fixed flow vane; 412. Second conical hollow head; 413. Second blade; 50. Water inlet connected in series with housing; 60. Rotating support component; 601. Axial support bearing; 602. Radial support bearing; 70. First seal; 701. Limiting groove; 71. Second seal; 80. Cable; 81. Air pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the attached Figure 1-5 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0033] The inventors of the present application have discovered that the existing emergency drainage equipment has obvious design defects, especially the demand for large flow and high head is particularly prominent in emergency rescue situations. The existing booster pumps are used in series to achieve the required high head and large flow, but because the motor is completely wrapped by the sealing cylinder, the volume of the entire device increases, which increases the difficulty of transportation and operation. In addition, the presence of the sealing cylinder not only increases the manufacturing cost, but also increases the resistance of the water flow, reducing the overall efficiency. More importantly, this design has poor portability and flexibility in emergency rescue, and cannot be quickly deployed and adjusted, which seriously affects the effect of emergency rescue. To this end, the present application mainly adopts the following scheme, which achieves the effects of high efficiency, lightweight, and easy serial connection, and solves the problems existing in the prior art.

[0034] The embodiment of the present application provides a large flow booster pump that is easy to connect in series, referring to Figure 1 and Figure 2, including a motor housing 10, a hydraulic component 20, a motor component 30, a water outlet serially connected to a housing 40, a water inlet serially connected to a housing 50, a rotation support component 60 and a positive pressure airtight system. A first installation cavity 11 is provided in the motor housing 10, the hydraulic component 20 is rotatably connected to the motor housing 10, and the motor component 30 is provided in the first installation cavity 11 for providing power to the hydraulic component 20. The water outlet serial shell 40 is detachably mounted on the water outlet end of the motor housing 10. A first sealing member 70 is provided at the connection between the water outlet serial shell 40, the hydraulic component 20 and the motor housing 10. The water inlet serial shell 50 is detachably mounted on the water inlet end of the motor housing 10. A second installation cavity 12 is provided between the outer wall of the motor housing 10, the inner wall of the water inlet serial shell 50 and the outer wall of the hydraulic component 20. The second installation cavity 12 is communicated with the first installation cavity 11. A second sealing member 71 for isolating the second installation cavity 12 from the external environment is provided between the water inlet serial shell 50 and the hydraulic component 20. The rotating support member 60 is provided in the first installation cavity 11 and / or the second installation cavity 12, and is used to axially and / or radially support the hydraulic component 20. The positive pressure airtight system (not shown in the figure) is communicated with the first installation cavity 11 and the second installation cavity 12, and is used to fill the first installation cavity 11 and the second installation cavity 12 with compressed air containing atomized lubricating oil to form a positive pressure seal.

[0035] Reference Figure 2 and Figure 3 Specifically, the motor housing 10 includes a first housing 101 and a first bracket 102 detachably mounted on one end of the first housing 101. The first bracket 102 is located in a cavity formed by the water inlet serial housing 50 and the first housing 101. The first bracket 102 is provided with a plurality of through holes to communicate the first installation cavity 11 with the second installation cavity 12. There is a certain gap between the first bracket 102 and the hydraulic component 20 to ensure the smooth rotation of the hydraulic component 20. The first housing 101 and the first bracket 102 can be connected by bolts or the like. The rotation support component 60 can be mounted on the first bracket 102, which can simplify the installation process of the rotation support component 60 and enhance the convenience of assembly and maintenance.

[0036] At the same time, the hydraulic component 20 includes an impeller barrel 201 and a guide blade 202 fixed inside the impeller barrel 201, the impeller barrel 201 is rotatably connected to the motor housing 10, and the impeller barrel 201 is concentric with the motor housing 10 inside the motor housing 10; wherein, the two ends of the impeller barrel 201 are respectively a water inlet and a water outlet, the water outlet is connected to the motor housing 10 in series with the outer shell 40 and communicates with the water outlet, and the water inlet is connected to the outer shell 50 and communicates with the water inlet after being connected to the motor housing 10. In this embodiment, the water outlet is connected to the outer shell 40 and the water inlet is connected to the outer shell 50 in series with the motor housing 10, and both are detachably connected to the motor housing 10 by bolts. In other embodiments, the water outlet is connected to the outer shell 40 and the water inlet is connected to the outer shell 50 and can be connected to the motor housing 10 respectively by snap-on connection or the like.

[0037] Reference Figure 2 and Figure 4 Optionally, the first seal 70 and the second seal 71 are sealing rings, a seal installation groove is formed between the motor housing 10 and the impeller barrel 201, the seal installation groove is annular, the first seal 70 is installed in the seal installation groove and one end of the first seal 70 extends to cover the end side of the impeller barrel 201, the water outlet is connected in series with the housing 40 and fixed to the motor housing 10 along the axial direction, the end side of the water outlet connected in series with the housing 40 abuts against the side of the first seal 70 away from the seal installation groove, and the impeller barrel 201 is rotatably connected to the first seal 70. Preferably, a limiting groove 701 is further provided on the side of the first seal 70 away from the impeller barrel 201, and one end of the water outlet connected in series with the housing 40 is crimped in the limiting groove 701, so as to further improve the sealing performance of the installation of the first seal 70.

[0038] Reference Figure 2 Preferably, the side edge of the water inlet end of the impeller barrel 201 extends outward to form an axial support portion 203, the rotating support component 60 includes an axial support bearing 601, a bearing installation groove is provided on the inner wall of the water inlet serial shell 50, the axial support bearing 601 is installed in the bearing installation groove and is located in the second installation cavity 12, the axial support portion 203 abuts against the axial support bearing 601, the second sealing member 71 is clamped between the inner wall of the water inlet serial shell 50, the end side edge of the impeller barrel 201 and the axial support portion 203, the side of the second sealing member 71 away from its center of gravity abuts against the side wall of the axial support portion 203, and the end side edge of the impeller barrel 201 and the axial support portion 203 are both rotatably connected to the second sealing member 71. Through this design, on the one hand, the second installation cavity 12 is well sealed, and on the other hand, the impeller barrel 201 can be well supported, with good sealing effect and high rotation efficiency. During operation, the impeller cylinder 201 rotates, and the guide vanes 202 are pushed back by the water pressure to generate an axial force toward the water inlet. The axial support bearing 601 can well withstand the unidirectional axial load.

[0039] Reference Figure 2 and Figure 5 The rotating support component 60 further includes a plurality of radial support bearings 602, one group of radial support bearings 602 is mounted on the first bracket 102 and abuts against the outer wall of the axial support portion 203 away from the second seal 71, and the radial support bearings 602 are arranged close to the second seal 71, and the other group of radial support bearings 602 abuts against the outer wall of the impeller cylinder 201 and is arranged close to the first seal 70. In this embodiment, since the axial support portion 203 bears the axial force, radial force and friction force of the second seal 71 respectively, the outer wall surface of the axial support portion 203 can be specially treated to enhance the structural strength and reduce the friction coefficient; in other embodiments, the overall structure of the axial support portion 203 can also be specially treated.

[0040] Reference Figure 3 Preferably, a plurality of axial support bearings 601 and radial support bearings 602 are arranged along the circumference of the impeller barrel 201, and the axial support bearings 601 and radial support bearings 602 are arranged in a radially staggered manner along the impeller barrel 201. This further optimizes the support layout and avoids local stress concentration caused by overlapping support points, thereby ensuring the stability and low vibration of the hydraulic component 20 during high-speed operation and extending the service life of the equipment. In other embodiments, the axial support bearing 601 or the radial support bearing 602 may also be provided separately.

[0041] Reference Figure 2 The motor component 30 includes a stator 301, a motor coil 302 and a rotor 303. The stator 301 and the motor coil 302 are installed on the inner wall of the motor housing 10. The rotor 303 is fixed to the outer wall of the impeller tube 201. The rotor 303 can be a motor rotor core. The rotor 303 and the stator 301 are arranged relative to each other. The rotor 303 is driven to rotate by the stator 301, and then the impeller tube 201 is driven to rotate to achieve drainage.

[0042] At the same time, the motor housing 10 is connected to a cable 80, the cable 80 is connected to the first installation cavity 11, the cable 80 is electrically connected to the motor coil 302, an air pipe 81 is installed in the cable 80, one end of the air pipe 81 is connected to the first installation cavity 11, and the other end of the air pipe 81 is connected to the positive pressure airtight system. The positive pressure airtight system can be an external constant pressure air source, which can provide compressed air to the first installation cavity 11 and the second installation cavity 12 to ensure the stability of the pressure in the first installation cavity 11 and the second installation cavity 12. Even if the sealing ring is worn, the airtight pressure in the motor housing 10 is always greater than that outside the housing, and water will not enter the motor housing 10. The first installation cavity 11 and the second installation cavity 12 are in atomized oil lubrication, with low resistance and high motor efficiency.

[0043] Reference Figure 2 In addition, the guide vane 202 includes a first conical hollow head 204 and a first blade 205 fixed to the outer wall of the first conical hollow head 204, the first blade 205 is fixed to the inner wall of the impeller tube 201, and the conical end of the first conical hollow head 204 faces the water inlet. The inner wall of the water outlet serially connected housing 40 is fixedly connected with a fixed flow vane 41, the fixed flow vane 41 includes a second conical hollow head 412 and a second blade 413 fixed to the outer wall of the second conical hollow head 412, the second blade 413 is fixed to the inner wall of the water outlet serially connected housing 40, and the conical end of the second conical hollow head 412 faces the water outlet. The ends of the first conical hollow head 204 and the second conical hollow head 412 away from the conical end are flush, and the cavities of the first conical hollow head 204 and the second conical hollow head 412 are movably connected. This design simplifies the structure, reduces the weight, and also enhances the guidance and stability of the water flow, further improving the overall performance of the pump.

[0044] The implementation principle of this embodiment is: by placing the motor component 30 outside the hydraulic component 20, a shaftless design is realized, which reduces water flow resistance and improves overall efficiency. The introduction of the positive pressure airtight system allows the motor housing 10 to always maintain a pressure greater than the outside pressure, preventing moisture from entering the motor and ensuring the normal operation of the motor. In addition, the modular design of each component makes the equipment lighter, convenient for rapid transportation and serial connection during emergency rescue, and greatly improves the efficiency of emergency drainage.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application. The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-flow booster pump that is easy to connect in series, characterized in that: include: Motor housing (10); A hydraulic component (20) is rotatably connected to the motor housing (10), and a first installation cavity (11) is provided between an outer wall of the hydraulic component (20) and an inner wall of the motor housing (10); A motor component (30) is disposed in the first installation cavity (11) and is used to provide power to the hydraulic component (20); The water outlet is connected in series with the housing (40) and is detachably mounted on the water outlet end of the motor housing (10); a first sealing member (70) is provided at the connection between the water outlet connected in series with the housing (40), the hydraulic component (20) and the motor housing (10); A water inlet serial connection housing (50) is detachably mounted on the water inlet end of the motor housing (10); a second installation cavity (12) is provided between the outer wall of the motor housing (10), the inner wall of the water inlet serial connection housing (50) and the outer wall of the hydraulic component (20); the second installation cavity (12) is communicated with the first installation cavity (11); and a second sealing member (71) is provided between the water inlet serial connection housing (50) and the hydraulic component (20) for isolating the second installation cavity (12) from the external environment; a rotation support component (60), disposed in the first installation cavity (11) and / or the second installation cavity (12), the rotation support component (60) being used to provide axial and / or radial support to the hydraulic component (20); A positive pressure airtight system is communicated with the first installation cavity (11) and the second installation cavity (12), and the positive pressure airtight system is used to fill the first installation cavity (11) and the second installation cavity (12) with compressed air containing atomized lubricating oil to form a positive pressure seal for the first installation cavity (11) and the second installation cavity (12).

2. A high-flow booster pump that is easy to connect in series according to claim 1, characterized in that: The water inlet end side edge of the hydraulic component (20) extends outward to form an axial support portion (203); the rotating support component (60) comprises an axial support bearing (601); the axial support bearing (601) is mounted on the inner wall of the water inlet serial shell (50) and is located in the second mounting cavity (12); the axial support portion (203) abuts against the axial support bearing (601); and the second sealing member (71) is clamped between the inner wall of the water inlet serial shell (50), the end side edge of the hydraulic component (20) and the axial support portion (203).

3. A high-flow booster pump that is easy to connect in series according to claim 2, characterized in that: The rotating support component (60) comprises a plurality of groups of radial support bearings (602), wherein the radial support bearings (602) are mounted on the motor housing (10), wherein one group of the radial support bearings (602) abuts against the outer wall of the axial support portion (203) and is disposed close to the second sealing member (71), and another group of the radial support bearings (602) abuts against the outer wall of the hydraulic component (20) and is disposed close to the first sealing member (70).

4. A high-flow booster pump that is easy to connect in series according to claim 3, characterized in that: A plurality of the axial support bearings (601) and the radial support bearings (602) are arranged along the circumference of the hydraulic component (20), and the axial support bearings (601) and the radial support bearings (602) are arranged in a radially staggered manner along the hydraulic component (20).

5. A high-flow booster pump that is easy to connect in series according to claim 1, characterized in that: A seal installation groove is formed between the motor housing (10) and the hydraulic component (20), the first seal (70) is installed in the seal installation groove and one end of the first seal (70) extends to cover the end side edge of the hydraulic component (20), and the end side edge of the water outlet serially connected housing (40) abuts against the side of the first seal (70) facing away from the seal installation groove.

6. A high-flow booster pump that is easy to connect in series according to claim 1, characterized in that: The motor housing (10) is connected to a cable (80), the cable (80) is in communication with the first installation cavity (11), the cable (80) is electrically connected to the motor component (30), an air pipe (81) is installed in the cable (80), one end of the air pipe (81) is in communication with the first installation cavity (11), and the other end of the air pipe (81) is connected to the positive pressure airtight system.

7. The high-flow booster pump that is easy to connect in series according to claim 1, characterized in that: The water outlet is serially connected to the inner wall of the housing (40) and is fixedly connected with a flow-fixing blade (41).

8. A high-flow booster pump that is easy to connect in series according to claim 7, characterized in that: The hydraulic component (20) comprises an impeller cylinder (201) and a guide blade (202) fixedly connected to the inner wall of the impeller cylinder (201); the guide blade (202) comprises a first conical hollow head (204) and a first blade (205) fixed to the outer wall of the first conical hollow head (204); the first blade (205) is fixed to the inner wall of the impeller cylinder (201); the conical end of the first conical hollow head (204) faces the water inlet; the fixed flow blade (41) comprises a second conical hollow head (412) and a second blade (413) fixed to the outer wall of the second conical hollow head (412); the second blade (413) is fixed to the inner wall of the water outlet serially connected housing (40); the conical end of the second conical hollow head (412) faces the water outlet; the first conical hollow head (204) and the second conical hollow head (412) are movably connected to each other in the cavity.

9. The high-flow booster pump that is easy to connect in series according to claim 1, characterized in that: The motor housing (10) comprises a first housing (101) and a first bracket (102) detachably connected to the first housing (101); the first bracket (102) is located in a cavity formed by the water inlet serial housing (50) and the first housing (101); and the rotating support component (60) can be mounted on the first bracket (102).

10. The high-flow booster pump that is easy to connect in series according to claim 1, characterized in that: The motor component (30) comprises a stator (301), a motor coil (302) and a rotor (303); the stator (301) and the motor coil (302) are mounted on the inner wall of the motor housing (10); the rotor (303) is fixed to the outer wall of the hydraulic component (20); and the rotor (303) and the stator (301) are arranged relative to each other.

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