A low-resistance transmission component for a marine follow-up water pump

Abstract

This application relates to a low-resistance transmission component for a marine follow-up water pump, belonging to the field of fluid machinery technology. The low-resistance transmission component for the marine follow-up water pump includes a rotating assembly, which comprises a fixed sleeve and a transmission shaft coaxially rotatably connected to the inner side of the fixed sleeve. Since the magnetic assembly includes a first magnetic part disposed on the fixed sleeve and a second magnetic part disposed on the transmission shaft, the first and second magnetic parts interact to counteract the axial load on the transmission shaft. Therefore, the magnetic assembly replaces the thrust bearing to balance the axial force on the transmission shaft, avoiding the large mechanical friction caused by the thrust bearing. When the follow-up water pump motor is turned on to draw water, the motor does not need to overcome friction to do work, thus improving mechanical efficiency. Simultaneously, when the follow-up water pump draws water but the motor is not turned on, because the magnetic assembly, in conjunction with the transmission shaft, achieves low-resistance transmission, water flows through the pump, and the impeller drives the transmission shaft to rotate, reducing the water inlet resistance and thus improving water intake efficiency.

Description

Technical Field

[0001] This application relates to the field of fluid machinery technology, and in particular to a low-resistance transmission component for a marine follow-up water pump. Background Technology

[0002] Water pumps are widely used in the energy and chemical industries. They typically rely on electric motors or turbines for power, primarily functioning to transport fluids. The main energy conversion process is: electrical energy → motor rotor mechanical energy → pump impeller mechanical energy → fluid kinetic energy. Water pumps commonly used in the energy and chemical industries are mainly powered by electric motors or turbines to drive fluid flow. Torque is typically transmitted between the motor and impeller via a coupling or integrated shaft, while mechanical seals ensure no leakage of the liquid medium between rotating and stationary parts.

[0003] In related technologies, marine cooling water systems have a follow-up water intake device installed outside the hull. The driving head for the flow of cooling water is provided by the relative motion between the water intake device and the water flow when the ship is sailing. The follow-up of cooling water requires that the resistance coefficient of each component in the system be low enough; otherwise, the follow-up requirement cannot be met.

[0004] However, when the water pump motor inside the follow-up system is turned on, the large pressure difference between the front and rear of the impeller generates a large axial force on the shaft, which needs to be balanced by the thrust bearing. The thrust bearing generates a large frictional force due to mechanical friction, which the motor needs to overcome, resulting in low mechanical efficiency. When the water pump motor inside the follow-up system is not turned on, the large frictional resistance generated between the shaft and the mechanical bearing and thrust bearing when the impeller rotates makes the driving force generated by the follow-up insufficient to overcome the shaft resistance, thus failing to realize the follow-up function of the system, resulting in high water intake resistance and low water intake efficiency. Summary of the Invention

[0005] This application provides a low-resistance transmission component for a marine follower water pump, which solves the problems in the related art where the transmission component of a marine follower water pump uses a thrust bearing to balance axial force, resulting in low mechanical efficiency due to the need to overcome mechanical friction, and low water intake efficiency due to high follower resistance of the transmission component.

[0006] This application provides a low-resistance transmission component for a marine follower water pump, including:

[0007] A rotating assembly, the rotating assembly including a fixed sleeve and a transmission shaft coaxially rotatably connected to the inner side of the fixed sleeve;

[0008] A magnetic assembly comprising a first magnetic part disposed on a fixed sleeve and a second magnetic part disposed on a drive shaft, the first magnetic part and the second magnetic part interacting to counteract the axial load on the drive shaft.

[0009] In some embodiments, the second magnetic part is located inside the first magnetic part, the first magnetic part and the second magnetic part attract each other, and the first magnetic part and the second magnetic part are spaced apart.

[0010] In some embodiments, the first magnetic part includes a plurality of first magnetic rings, and the second magnetic part includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged in close contact along the axial direction of the drive shaft, and the north and south poles of the first magnetic rings and second magnetic rings are aligned with the axial direction of the drive shaft, while the north and south poles of the first magnetic rings and second magnetic rings are arranged in opposite directions.

[0011] In some embodiments, the second magnetic part is located on one side of the first magnetic part, and the first magnetic part and the second magnetic part are spaced apart.

[0012] In some embodiments, the first magnetic part includes a plurality of first magnetic rings, and the second magnetic part includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged alternately at intervals along the axial direction of the drive shaft, and the north and south poles of the first magnetic rings and second magnetic rings are aligned with the axial direction of the drive shaft.

[0013] In some embodiments, a magnetic coupling is provided at one end of the drive shaft, and an impeller is provided at the other end of the drive shaft.

[0014] In some embodiments, a thrust block for axially limiting the transmission shaft is provided at one end of the fixed sleeve near the magnetic coupling, and an annular limiting groove is provided on the side of the impeller near the fixed sleeve, with the end of the fixed sleeve near the impeller extending into the interior of the annular limiting groove.

[0015] In some embodiments, both ends of the fixed sleeve are provided with sliding bearings, the sliding bearings including a bushing fixedly connected to the outside of the transmission shaft and a sliding sleeve fixedly connected to the inside of the fixed sleeve and slidably connected to the outside of the bushing.

[0016] In some embodiments, a lubricating medium is filled between the retaining sleeve and the drive shaft.

[0017] In some embodiments, the fixing sleeve is formed by splicing multiple ring sleeves along the axial direction of the drive shaft.

[0018] The beneficial effects of the technical solution provided in this application include:

[0019] This application provides a low-resistance transmission component for a marine follower water pump. The rotating assembly includes a fixed sleeve and a transmission shaft coaxially rotatably connected to the inner side of the fixed sleeve. The magnetic assembly includes a first magnetic part disposed on the fixed sleeve and a second magnetic part disposed on the transmission shaft. The first and second magnetic parts interact to counteract the axial load on the transmission shaft. Therefore, the magnetic assembly replaces the thrust bearing to balance the axial force on the transmission shaft, avoiding the large mechanical friction caused by using a thrust bearing. When the follower water pump motor is turned on to draw water, the motor does not need to overcome friction to do work, thus improving mechanical efficiency. Simultaneously, when the follower water pump draws water but the motor is not turned on, the magnetic assembly, in conjunction with the transmission shaft, achieves low-resistance transmission. Water flows through the pump, and the impeller drives the transmission shaft to rotate, reducing the inlet resistance and thus improving water intake efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0022] Figure 2 This is a cross-sectional view of the fixed sleeve according to an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the transmission shaft according to an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the magnetic component in an embodiment of this application.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Fixed sleeve; 2. Drive shaft; 3. Magnetic assembly; 31. First magnetic part; 32. Second magnetic part; 4. Magnetic coupling; 41. Outer magnetic rotor; 42. Isolation sleeve; 43. Inner magnetic rotor; 5. Impeller; 6. Thrust block; 7. Annular limiting groove; 8. Sliding bearing; 81. Sliding sleeve; 82. Shaft sleeve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] This application provides a low-resistance transmission component for a marine follower water pump, which can solve the problems in the related art where the transmission component of a marine follower water pump uses a thrust bearing to balance the axial force, resulting in low mechanical efficiency due to the need to overcome mechanical friction, and low water intake efficiency due to high follower resistance of the transmission component.

[0029] See Figures 1 to 4 As shown in the figure, this application provides a low-resistance transmission component for a marine follower water pump, comprising:

[0030] A rotating assembly, comprising a fixed sleeve 1 and a transmission shaft 2 coaxially rotatably connected to the inner side of the fixed sleeve 1;

[0031] The magnetic component 3 includes a first magnetic part 31 disposed on the fixed sleeve 1 and a second magnetic part 32 disposed on the transmission shaft 2. The first magnetic part 31 and the second magnetic part 32 interact to counteract the axial load on the transmission shaft 2.

[0032] The rotating assembly of the low-resistance transmission component for a marine follower water pump in this embodiment of the application includes a fixed sleeve 1 and a transmission shaft 2 coaxially rotatably connected to the inner side of the fixed sleeve 1. The magnetic assembly 3 includes a first magnetic part 31 disposed on the fixed sleeve 1 and a second magnetic part 32 disposed on the transmission shaft 2. The first magnetic part 31 and the second magnetic part 32 interact to counteract the axial load on the transmission shaft 2. In actual use, the fixed sleeve 1 is fixedly installed inside the water pump housing, the transmission shaft 2 is installed at the output end of the water pump motor, and an impeller 5 for guiding water from the water pump inlet to the water pump outlet is fixedly installed on the transmission shaft 2. The transmission shaft 2 has two driving modes in actual use:

[0033] The first method relies on the driving head provided by an external water intake device to make water flow through the pump body under follow-up conditions. The impeller 5 and the drive shaft 2 rotate accordingly, and the motor does not need to be turned on. When the drive shaft 2 rotates, the magnetic force of the first magnetic part 31 acts on the second magnetic part 32, thereby binding the axial position of the drive shaft 2 and balancing the axial force on the drive shaft 2. The first magnetic part 31 is fixed on the fixed sleeve 1, and the second magnetic part 32 is fixed on the drive shaft 2. The first magnetic part 31 and the second magnetic part 32 do not contact each other, realizing low-resistance transmission of the drive shaft 2. Compared with the existing drive shaft 2 balancing the axial force through the thrust bearing, the use of the magnetic component 3 to balance the axial force on the drive shaft 2 avoids the mechanical friction between the mechanical thrust bearing and the shaft end, thereby greatly reducing the resistance when the water pump rotates. The rotation of the impeller 5 reduces the water inlet resistance, thereby improving the water intake efficiency.

[0034] The second scenario involves the drive shaft 2 rotating under the motor's drive when the motor is running. The drive shaft 2 drives the impeller 5 to rotate, and the impeller 5 drives the water flow. The magnetic component 3 replaces the thrust bearing to balance the axial force on the drive shaft 2. At the same time, the first and second magnetic parts 32 interact magnetically, replacing the mechanical thrust bearing and eliminating the mechanical friction between the mechanical thrust bearing and the shaft end. This means that when the follower water pump motor starts to draw water, it does not need to consume some of the motor's work, thus increasing the useful work output of the motor and improving mechanical efficiency.

[0035] It should be noted that the external water intake device under the follow-up working condition is a water intake pipe connected to the inlet end of the follow-up water pump and facing the ship's upstream side. It can use the dynamic pressure when the ship is sailing to allow water to enter the ship's cooling water system from the water inlet of the follow-up water pump. When the ship is not sailing, the water pump is used to drive the drive shaft 2 and impeller 5 to rotate, so that water enters the ship's cooling water system from the water inlet of the follow-up water pump.

[0036] In some alternative embodiments: see Figures 1 to 4 As shown, this application embodiment provides a low-resistance transmission component for a marine follower water pump. The second magnetic part 32 of the low-resistance transmission component for the marine follower water pump is located inside the first magnetic part 31. The first magnetic part 31 and the second magnetic part 32 attract each other and are spaced apart.

[0037] The first magnetic part 31 includes a plurality of first magnetic rings, and the second magnetic part 32 includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged in close contact along the axial direction of the transmission shaft 2, and the north and south poles of the first magnetic rings and the second magnetic rings are aligned with the axial direction of the transmission shaft 2, while the north and south poles of the first magnetic rings and the second magnetic rings are arranged in opposite directions.

[0038] The second magnetic part 32 of the low flow resistance follower water pump for marine cooling water system in this embodiment is located inside the first magnetic part 31. The first magnetic part 31 and the second magnetic part 32 attract each other and are spaced apart. The first magnetic part 31 includes a plurality of first magnetic rings and the second magnetic part 32 includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are all arranged in close contact along the axial direction of the drive shaft 2, and the north and south poles of the first magnetic rings and the second magnetic rings are aligned with the axial direction of the drive shaft 2. The north and south poles of the first magnetic rings and the second magnetic rings are arranged in opposite directions.

[0039] In actual use, the first magnetic ring is located outside the second magnetic ring. Multiple first magnetic rings are axially attached and fixedly distributed inside the fixed sleeve 2, and multiple second magnetic rings are axially attached and fixedly distributed outside the transmission shaft 2. A gap is provided between the first and second magnetic rings, and the north and south poles of the first and second magnetic rings are arranged in opposite directions. During the rotation of the transmission shaft 2, the transmission shaft 2 drives the second magnetic ring to rotate. The first magnetic ring fixed on the fixed sleeve 2 attracts the second magnetic ring on the transmission shaft 2, restraining the axial position of the transmission shaft 2, thereby balancing the axial force on the transmission shaft 2. This replaces the mechanical thrust bearing, eliminates the mechanical friction between the mechanical thrust bearing and the shaft end, and significantly reduces the resistance of the water pump when it rotates.

[0040] It should be noted that a first annular bearing sleeve and a second annular bearing sleeve can be provided. The first magnetic ring can be fixed to the inner side of the first annular bearing sleeve first, and then the first annular bearing sleeve can be fixed to the inner side of the fixing sleeve 2, which facilitates installation. Alternatively, the first magnetic ring can be directly fixed to the inner side of the fixing sleeve 2. The second magnetic ring can be fixed to the outer side of the second annular bearing sleeve first, and then the second annular bearing sleeve can be fitted and fixed on the drive shaft 2, which facilitates installation. Alternatively, the second magnetic ring can be directly fixed to the drive shaft 2.

[0041] In some alternative embodiments: see Figures 1 to 3 As shown, this application embodiment provides a low-resistance transmission component for a marine follower water pump. The second magnetic part 32 of the low-resistance transmission component for the marine follower water pump is located on one side of the first magnetic part 31, and the first magnetic part 31 and the second magnetic part 32 are spaced apart.

[0042] The first magnetic part 31 includes a plurality of first magnetic rings, and the second magnetic part 32 includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged alternately and at intervals along the axial direction of the transmission shaft 2, and the north and south poles of the first magnetic rings and the second magnetic rings are aligned with the axial direction of the transmission shaft 2.

[0043] The second magnetic part 32 of the low flow resistance follower water pump for marine cooling water system in this embodiment is located on one side of the first magnetic part 31. The first magnetic part 31 and the second magnetic part 32 are spaced apart. The first magnetic part 31 includes a plurality of first magnetic rings, and the second magnetic part 32 includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged alternately and spaced along the axial direction of the drive shaft 2, and the north and south poles of the first magnetic rings and the second magnetic rings are aligned with the axial direction of the drive shaft 2.

[0044] In practical use, when multiple first magnetic rings and second magnetic rings are spaced apart and staggered along the axial direction of the drive shaft 2, and the second magnetic ring is located to the left of the first magnetic ring, the north and south poles of the first and second magnetic rings are arranged in the same direction. During the rotation of the drive shaft 2, the drive shaft 2 drives the second magnetic ring to rotate. The first magnetic ring fixed on the fixed sleeve 2 attracts the second magnetic ring. The direction of the attraction is opposite to the direction of the axial force on the drive shaft 2, thereby balancing the axial force on the drive shaft 2. This replaces the mechanical thrust bearing, eliminates the mechanical friction between the mechanical thrust bearing and the shaft end, and greatly reduces the resistance of the water pump when it rotates.

[0045] When multiple first and second magnetic rings are spaced apart and staggered along the axial direction of the drive shaft 2, and the second magnetic ring is located to the right of the first magnetic ring, the north and south poles of the first and second magnetic rings are arranged in opposite directions. During the rotation of the drive shaft 2, the drive shaft 2 drives the second magnetic ring to rotate. The first magnetic ring fixed on the fixed sleeve 2 repels the second magnetic ring. The direction of the repulsive force is opposite to the direction of the axial force on the drive shaft 2, thereby balancing the axial force on the drive shaft 2. This replaces the mechanical thrust bearing, eliminates the mechanical friction between the mechanical thrust bearing and the shaft end, and significantly reduces the resistance of the water pump when it rotates.

[0046] In some alternative embodiments: see Figure 1 As shown in the figure, this application provides a low-resistance transmission component for a marine follower water pump. One end of the transmission shaft 2 of the low-resistance transmission component for the marine follower water pump is provided with a magnetic coupling 4, and the other end of the transmission shaft 2 is provided with an impeller 5.

[0047] In this embodiment of the application, a low-resistance transmission component for a marine follow-up water pump has a drive shaft 2 connected to a water pump motor at one end via a magnetic coupling 4, and an impeller 5 for guiding water from the water pump inlet to the water pump outlet is fixedly installed at the other end of the drive shaft 2. In actual use, the magnetic coupling 4 includes an inner magnetic rotor 43 fixedly connected to the drive shaft 2 and an outer magnetic rotor 41 fixedly connected to the output end of the water pump motor. The inner magnetic rotor 43 and the outer magnetic rotor 41 are separated by an isolation sleeve 42, which is fixed to the water pump housing and forms a seal with the water pump housing. Using the principle of magnetic coupling, force and torque can be transmitted between the motor output shaft and the drive shaft 2 without direct contact. Since the motor rotor and the water pump rotor are not directly connected, the isolation sleeve 42 transforms the dynamic seal into a static seal, achieving a zero-leakage sealing design for the water pump.

[0048] It should be noted that the impeller 5 is keyed to the drive shaft 2 and locked to the drive shaft 2 with a nut, the inner magnetic rotor 43 is keyed to the drive shaft 2 and locked to the drive shaft 2 with a nut, the outer magnetic rotor 41 is keyed to the motor output shaft and fixed to the motor output shaft with a set screw, the isolation sleeve 42 and the water pump housing are sealed together by a sealing ring, and the isolation sleeve 42 separates the fixed sleeve 1 and the motor.

[0049] It should be noted that in the embodiments of this application, the outer magnetic rotor 41 of the magnetic coupling 4 can be an electromagnet, and the inner magnetic rotor 43 can be a permanent magnet. During the process of the transmission shaft 2 driving the inner magnetic rotor 43 to follow, since the water pump motor does not run, the outer magnetic rotor 41 is not energized. Therefore, the inner magnetic rotor 43 will not drive the motor rotor to rotate through the outer magnetic rotor 41, thereby further reducing the resistance of the water pump when it rotates, which is conducive to improving the efficiency of water intake.

[0050] In some alternative embodiments: see Figures 1 to 2 As shown, this application embodiment provides a low-resistance transmission component for a marine follower water pump. The fixed sleeve 1 of the low-resistance transmission component for the marine follower water pump is provided with a thrust block 6 for axially limiting the transmission shaft 2 at one end near the magnetic coupling 4. An annular limiting groove 7 is provided on the side of the impeller 5 near the fixed sleeve 1, and the fixed sleeve 1 extends into the interior of the annular limiting groove 7 at one end near the impeller 5.

[0051] In this embodiment of the application, a thrust block 6 for axially limiting the transmission shaft 2 is fixedly installed on one end of the fixed sleeve 1 of the low-resistance transmission component for a marine follower water pump near the magnetic coupling 4. An annular limiting groove 7 is provided on the side of the impeller 5 near the fixed sleeve 1, and the end of the fixed sleeve 1 near the impeller 5 extends into the interior of the annular limiting groove 7. In actual use, one end of the drive shaft 2 is connected to the water pump motor through the magnetic coupling 4. Since the magnetic component 3 replaces the thrust bearing, the drive shaft 2 is floating in the axial direction. The inner magnetic rotor 43 on the magnetic coupling 4 is fixedly installed on the drive shaft 2. The right side of the inner magnetic rotor 43 is provided with a smooth surface for contact with the thrust block 6. The thrust block 6 limits the rightward movement limit of the drive shaft 2 by limiting the rightward movement limit of the inner magnetic rotor 43, thus avoiding contact and friction between the inner magnetic rotor 43 and the fixed sleeve 1. At the same time, since the impeller 5 has an annular limiting groove 7 on the side near the fixed sleeve 1, and the end of the fixed sleeve 1 near the impeller 5 extends into the interior of the annular limiting groove 7, the fixed sleeve 1 limits the leftward movement limit of the drive shaft 2 by limiting the leftward movement limit of the impeller 5, thus avoiding contact and friction between the inner magnetic rotor 43 on the magnetic coupling 4 and the isolation sleeve 42.

[0052] In some alternative embodiments: see Figures 1 to 2 As shown, this application embodiment provides a low-resistance transmission component for a marine follower water pump. Both ends of the fixed sleeve 1 of the low-resistance transmission component for the marine follower water pump are provided with sliding bearings 8. The sliding bearings 8 include a bushing 82 fixedly connected to the outside of the transmission shaft 2 and a sliding sleeve 81 fixedly connected to the inside of the fixed sleeve 1 and slidably connected to the outside of the bushing 82.

[0053] In this embodiment of the application, the fixed sleeve 1 for a low-resistance transmission component of a marine follow-up water pump is equipped with sliding bearings 8 at both ends. Each sliding bearing 8 includes a bushing 82 fixedly connected to the outer side of the transmission shaft 2 and a sliding sleeve 81 fixedly connected to the inner side of the fixed sleeve 1 and slidably connected to the outer side of the bushing 82. In actual use, the sliding bearings 8 at both ends of the fixed sleeve 1 cooperate to radially support and position the transmission shaft 2. It should be noted that the sliding bearings 8 do not restrict the transmission shaft 2 in the axial direction. A bushing is fitted between the transmission shaft 2 and the bushing 82 to prevent friction between them. The bushing 82 is axially positioned by the shaft step of the transmission shaft 2 and a nut. The sliding sleeve 81 is fixed to the inner side of the fixed sleeve 1 by a set screw. The sliding sleeve 81 and the bushing 82 can be filled with lubricating medium.

[0054] In some alternative embodiments: see Figure 1 As shown, this application embodiment provides a low-resistance transmission component for a marine follower water pump, wherein the space between the fixed sleeve 1 and the transmission shaft 2 of the low-resistance transmission component for the marine follower water pump is filled with a lubricating medium.

[0055] In this embodiment of the application, the fixed sleeve 1 and the drive shaft 2 of the low-resistance transmission component for a marine follow-up water pump are filled with a lubricating medium. In actual use, since the fixed sleeve 1 is located inside the water pump housing and is immersed in water, and there is no sealing treatment between the fixed sleeve 1 and the impeller 5, water can be immersed between the fixed sleeve 1 and the drive shaft 2 to form water lubrication. As a lubricating medium, water, together with the sliding bearing 8, provides radial support and positioning for the drive shaft 2. Water lubrication reduces the dry friction between the sliding sleeve 81 and the bushing 82 of the sliding bearing 8, which helps to reduce the resistance of the water pump when it rotates.

[0056] In some alternative embodiments: see Figures 1 to 2 As shown, this application embodiment provides a low-resistance transmission component for a marine follower water pump. The fixing sleeve 1 of the low-resistance transmission component for the marine follower water pump is formed by splicing multiple ring sleeves along the axial direction of the transmission shaft 2.

[0057] The fixing sleeve 1 of the low-resistance transmission component for marine follow-up water pump in this embodiment is composed of multiple ring sleeves spliced ​​together along the axial direction of the transmission shaft 2. In actual use, in order to facilitate the installation of the sliding bearing 8 and the transmission shaft 2, the fixing sleeve 1 can be made of multiple ring sleeves spliced ​​together and fixedly connected by threads, fastening screws, etc. At the same time, the fixing sleeve 1 is composed of multiple ring sleeves, which is convenient for manufacturing. The gap formed between the multiple ring sleeves facilitates water immersion and water lubrication between the fixing sleeve 1 and the transmission shaft 2.

[0058] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0059] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A low-resistance transmission component for a marine follow-up water pump, characterized in that, include: A rotating assembly, comprising a fixed sleeve (1) and a transmission shaft (2) coaxially rotatably connected to the inner side of the fixed sleeve (1). The magnetic assembly (3) includes a first magnetic part (31) disposed on the fixed sleeve (1) and a second magnetic part (32) disposed on the transmission shaft (2). The first magnetic part (31) and the second magnetic part (32) interact to counteract the axial load on the transmission shaft (2). A magnetic coupling (4) is provided at one end of the drive shaft (2), and an impeller (5) is provided at the other end of the drive shaft (2). The fixed sleeve (1) is provided with a thrust block (6) for axially limiting the transmission shaft (2) at one end near the magnetic coupling (4). The impeller (5) is provided with an annular limiting groove (7) on one side near the fixed sleeve (1). The fixed sleeve (1) extends into the annular limiting groove (7) at one end near the impeller (5). Both ends of the fixed sleeve (1) are provided with sliding bearings (8). The sliding bearings (8) include a bushing (82) fixedly connected to the outside of the transmission shaft (2) and a sliding sleeve (81) fixedly connected to the inside of the fixed sleeve (1) and slidably connected to the outside of the bushing (82). The space between the fixed sleeve (1) and the drive shaft (2) is filled with a lubricating medium; The fixed sleeve (1) is formed by splicing multiple ring sleeves along the axial direction of the transmission shaft (2); The second magnetic part (32) is located inside the first magnetic part (31), the first magnetic part (31) and the second magnetic part (32) attract each other, and the first magnetic part (31) and the second magnetic part (32) are spaced apart. The first magnetic part (31) includes a plurality of first magnetic rings, and the second magnetic part (32) includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged in close contact along the axial direction of the transmission shaft (2), and the north and south poles of the first magnetic rings and the second magnetic rings are aligned with the axial direction of the transmission shaft (2). The north and south poles of the first magnetic rings and the second magnetic rings are arranged in opposite directions. Alternatively, the second magnetic part (32) is located on one side of the first magnetic part (31), and the first magnetic part (31) and the second magnetic part (32) are spaced apart; The first magnetic part (31) includes a plurality of first magnetic rings, and the second magnetic part (32) includes a plurality of second magnetic rings. The plurality of first magnetic rings and second magnetic rings are arranged alternately and at intervals along the axial direction of the transmission shaft (2), and the north and south poles of the first magnetic rings and the second magnetic rings are aligned with the axial direction of the transmission shaft (2).

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