A pump

Abstract

This invention discloses a pump in which the outer shell of a planetary reducer is connected to the outlet end of an outer shell assembly. The outer shell assembly has a fluid inlet at its inlet end and a fluid outlet on its outer periphery. The outer shell assembly is fitted onto the outer periphery of an inner shell assembly, which rotates relative to the outer shell assembly. The inner shell assembly is fixed to the outer periphery of a rectifier impeller shaft, whose outlet end is fixedly connected to a planetary carrier. A rectifier impeller assembly is mounted on the outer periphery of the rectifier impeller shaft, and its outer periphery is fixed to the inner wall of the inner shell assembly. A centrifugal impeller shaft passes through the rectifier impeller shaft and rotates relative to it. The end of the centrifugal impeller shaft is fixedly connected to a sun gear, and a centrifugal impeller assembly is mounted on its outer periphery. The centrifugal impeller assembly is located within the rectifier impeller assembly and rotates relative to it. The end of the centrifugal impeller shaft is connected to an input shaft, which is rotatably connected to the planetary reducer housing.

Description

Technical Field

[0001] This invention relates to the field of pump technology, and more specifically to a pump. Background Technology

[0002] Existing centrifugal pumps, especially multi-stage centrifugal pumps and multi-stage axial compressors, take multi-stage centrifugal pumps as an example. Each mover can output more than 90% of the mechanical energy (rotating fluid). The output pressure is not large, but the mechanical energy of the output rotating fluid is very large. However, all of this mechanical energy is lost by the stator (rectifier). The stator is supposed to play a role in pressure diffusion, but its effect is very small and not worth the effort. Therefore, the reason for its low efficiency is that the mechanical energy output by the mover is greater than the pressure energy that needs to be generated. The crux of the problem lies in the mechanical energy loss on the stator. The more stages or the larger the flow rate, the greater the loss and the lower the efficiency. If the diffusion function of each stage stator is eliminated and all the lost mechanical energy is returned to the engine input shaft to do work, then the efficiency will be directly improved. Summary of the Invention

[0003] Therefore, the present invention provides a pump to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] According to a first aspect of the invention, a pump includes a housing assembly, an inner housing assembly, a planetary reducer assembly, a fluid inlet, a fluid outlet, an input shaft, a centrifugal impeller shaft, a rectifier impeller shaft, a centrifugal impeller assembly, and a rectifier impeller assembly.

[0006] The planetary reducer assembly includes a planetary reducer housing, an external gear ring, a planet carrier, planetary gears, and a sun gear;

[0007] The planetary reducer housing is connected to the outlet end of the housing assembly, the inlet end of the housing assembly is provided with the fluid inlet, and the outer periphery of the outlet end of the housing assembly is provided with the fluid outlet.

[0008] The outer shell assembly is sleeved on the outer periphery of the inner shell assembly. The inner shell assembly rotates relative to the outer shell assembly. The inner shell assembly is fixed on the outer periphery of the rectifier impeller shaft. The outlet end of the rectifier impeller shaft is fixedly connected to the planetary carrier. The rectifier impeller assembly is installed on the outer periphery of the rectifier impeller shaft. The outer periphery of the rectifier impeller assembly is fixed on the inner wall of the inner shell assembly.

[0009] The centrifugal impeller shaft passes through the rectifier impeller shaft and rotates relative to the rectifier impeller shaft. The end of the centrifugal impeller shaft is fixedly connected to the sun gear, and the centrifugal impeller assembly is installed on the outer circumference of the centrifugal impeller shaft.

[0010] The centrifugal impeller assembly is located within the rectifier impeller assembly and rotates relative to the rectifier impeller assembly. The end of the centrifugal impeller shaft is connected to the input shaft, and the input shaft is rotatably connected in the planetary reducer housing.

[0011] Furthermore, the outer shell assembly includes an outer shell body, an outlet end outer shell base, and an inlet end outer shell base; the outer shell body is a tubular structure, with the outlet end outer shell base installed at one end of the outer shell body and the inlet end outer shell base installed at the other end of the outer shell body. The inlet end outer shell base has a fluid inlet communicating with the inner shell body in the middle, and the outer side wall of the outer shell body near the outlet end outer shell base has a fluid outlet. The end of the inner shell assembly is rotatably connected to the inlet end outer shell base.

[0012] Furthermore, the inner shell assembly includes an inner shell body, an outlet end inner shell base, and an inlet end inner shell base. The inner shell body is a tubular structure. The outlet end inner shell base is installed at one end of the inner shell body, and the inlet end inner shell base is installed at the other end of the inner shell body. The inlet end inner shell base is rotatably connected inside the inlet end outer shell base, and the outlet end inner shell base is fixed to the outer circumference of the rectifier impeller shaft.

[0013] Furthermore, the centrifugal impeller assembly includes multiple centrifugal impeller units, which are equally spaced on the centrifugal impeller shaft.

[0014] Furthermore, the centrifugal impeller unit includes a centrifugal disc and centrifugal radial blades. The centrifugal disc has a plurality of centrifugal radial blades on its side. The centrifugal radial blades extend along the radial direction of the centrifugal disc. The centrifugal disc is fixed to the outer circumference of the centrifugal impeller shaft. The outer diameter of the centrifugal disc is smaller than the outer diameter of the centrifugal radial blades.

[0015] Furthermore, the rectifier impeller assembly includes multiple rectifier impeller units, which are equally spaced on the rectifier impeller shaft. The outer periphery of each rectifier impeller unit is fixed to the inner wall of the inner shell body, and the rectifier impeller units and the centrifugal impeller units are arranged alternately.

[0016] Furthermore, the rectifier impeller unit includes a rectifier disk and rectifier radial blades. The rectifier disk has multiple rectifier radial blades on its side, and the rectifier disk has an inner hole in the middle for fluid to pass through.

[0017] Furthermore, the effective working outer diameter of the centrifugal radial blade and the rectifier radial blade must be the same.

[0018] Furthermore, it also includes positioning grooves. The inner sidewall of the inner shell body is provided with four positioning grooves, and the outer sidewall of each rectifier wheel is provided with four key bars, which are installed in the positioning grooves.

[0019] Furthermore, it also includes a first bearing, a second bearing, and a sealing ring; the input shaft is rotatably connected to the planetary reducer housing via the first bearing, the inlet end inner housing base is rotatably connected to the inlet end outer housing base via the second bearing, and the sealing ring is provided at the rotatable contact point between the inlet end inner housing base and the inlet end outer housing base.

[0020] The present invention has the following advantages: When the centrifugal impeller encounters low pressure and high flow output, the engine speed will decrease, and the speed of the centrifugal impeller will decrease by a factor of two, thus making the engine less strained; when encountering high pressure and low flow output, the engine speed will increase, and the speed of the centrifugal impeller will increase by a factor of two. In this way, the engine will not encounter the dilemma of having torque but not being able to drive a conventional centrifugal pump. Therefore, in complex working conditions, the operating principle of this device is more ideal than that of a conventional centrifugal pump. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of a pump provided for some embodiments of the present invention.

[0022] Figure 2 This is a cross-sectional view of a pump provided for some other embodiments of the present invention.

[0023] Figure 3 This is a first-view view of a pump provided for some embodiments of the present invention.

[0024] Figure 4 This is a second-view view of a pump provided for some embodiments of the present invention.

[0025] Figure 5 This is a first-view internal structural diagram of a pump provided for some embodiments of the present invention.

[0026] Figure 6 This is a second-view internal structural diagram of a pump provided for some embodiments of the present invention.

[0027] Figure 7 This is a diagram of a non-rotating integral housing of a pump, provided for some embodiments of the present invention.

[0028] Figure 8 This is a diagram of the overall rotating component of a pump provided for some embodiments of the present invention.

[0029] Figure 9 This is a cross-sectional view of the outer casing and inner casing of a pump provided for some embodiments of the present invention.

[0030] Figure 10 This is a diagram showing the position of the rectifier impeller of a pump, provided for some embodiments of the present invention.

[0031] Figure 11 This is a diagram showing the position of the centrifugal impeller of a pump, provided for some embodiments of the present invention.

[0032] Figure 12 This diagram illustrates the connection relationship between the centrifugal impeller shaft and the rectifier impeller shaft of a pump and the planetary reducer, as provided in some embodiments of the present invention.

[0033] Figure 13 A diagram showing the connection between the rectifier impeller shaft and the centrifugal impeller shaft of a pump, provided for some embodiments of the present invention.

[0034] Figure 14 This is a diagram of the inner casing shaft structure of a pump provided for some embodiments of the present invention.

[0035] Figure 15 This is a structural diagram of the inner casing shaft of a pump provided for some embodiments of the present invention.

[0036] Figure 16 This is a diagram of the inner casing shaft base of a pump, provided for some embodiments of the present invention.

[0037] Figure 17 This is a structural diagram of a pump's rectifier impeller assembly provided for some embodiments of the present invention.

[0038] Figure 18 This is a structural diagram of a centrifugal impeller assembly of a pump provided for some embodiments of the present invention.

[0039] Figure 19 This is a structural diagram of a centrifugal impeller for a pump, provided for some embodiments of the present invention.

[0040] Figure 20 This is a structural diagram of a pump's rectifier impeller provided for some embodiments of the present invention.

[0041] In the diagram: 1. Outer shell body; 2. Outlet end outer shell base; 3. Inlet end outer shell base; 4. Fluid inlet; 5. Fluid outlet; 6. Planetary reducer housing; 7. External gear ring; 8. Sun gear; 9. Planetary carrier; 10. Planetary gear; 11. Inner shell body; 12. Outlet end inner shell base; 13. Inlet end inner shell base; 14. Rectifier impeller shaft; 15. Rectifier impeller unit; 16. Positioning groove; 17. Input shaft; 18. Centrifugal impeller shaft; 19. Centrifugal impeller unit; 20. First bearing; 21. Second bearing; 22. Sealing ring. Detailed Implementation

[0042] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1

[0044] like Figures 1 to 20 As shown, a pump according to a first aspect embodiment of the present invention includes a housing assembly, an inner housing assembly, a planetary reducer assembly, a fluid inlet 4, a fluid outlet 5, an input shaft 17, a centrifugal impeller shaft 18, a rectifier impeller shaft 14, a centrifugal impeller assembly, and a rectifier impeller assembly; the planetary reducer assembly has a planetary reducer housing 6, an external gear ring 7, a planet carrier 9, planetary gears 10, and a sun gear 8; the planetary reducer housing 6 is connected to the outlet end of the housing assembly, the inlet end of the housing assembly is provided with a fluid inlet 4, and the outer periphery of the outlet end of the housing assembly is provided with a fluid outlet 5; the housing assembly is sleeved on the outer periphery of the inner housing assembly, the inner housing assembly rotates relative to the housing assembly, and the inner housing assembly is fixed on... The outer periphery of the rectifier impeller shaft 14 is fixedly connected to the planetary carrier 9 at its outlet end. A rectifier impeller assembly is installed on the outer periphery of the rectifier impeller shaft 14, and the outer periphery of the rectifier impeller assembly is fixed to the inner wall of the inner shell assembly. The centrifugal impeller shaft 18 passes through the rectifier impeller shaft 14 and rotates relative to the rectifier impeller shaft 14. The end of the centrifugal impeller shaft 18 is fixedly connected to the sun gear 8, and a centrifugal impeller assembly is installed on the outer periphery of the centrifugal impeller shaft 18. The centrifugal impeller assembly is located inside the rectifier impeller assembly and rotates relative to the rectifier impeller assembly. The end of the centrifugal impeller shaft 18 is connected to the input shaft 17, and the input shaft 17 is rotatably connected to the planetary reducer housing 6.

[0045] In the above embodiments, it should be noted that an external gear ring 7 is provided on the inner side wall of the planetary reducer housing 6, and planetary gears 10 are installed on the planet carrier 9. Multiple planetary gears 10 mesh with the external gear ring 7 for transmission, and multiple planetary gears 10 also mesh with the sun gear 8 for transmission.

[0046] The technical effects achieved by the above embodiments are as follows: When the centrifugal impeller encounters low pressure and high flow output, the engine speed will decrease, and the speed of the centrifugal impeller will decrease by a factor of two, thus making the engine less strained; when encountering high pressure and low flow output, the engine speed will increase, and the speed of the centrifugal impeller will increase by a factor of two. In this way, the engine will not encounter the dilemma of having torque but not being able to drive a regular centrifugal pump. Therefore, in complex working conditions, the operating principle of this device is more ideal than that of a regular centrifugal pump.

[0047] Example 2

[0048] like Figures 1 to 20 As shown, a pump includes all the contents of Embodiment 1. In addition, the outer casing assembly includes an outer casing body 1, an outlet end outer casing base 2, and an inlet end outer casing base 3. The outer casing body 1 is a tubular structure. The outlet end outer casing base 2 is installed at one end of the outer casing body 1, and the inlet end outer casing base 3 is installed at the other end of the outer casing body 1. A fluid inlet 4 communicating with the inner casing body 1 is provided in the middle of the inlet end outer casing base 3. A fluid outlet 5 is provided on the outer side wall of the outer casing body 1 near the outlet end outer casing base 2. The end of the inner casing assembly is rotatably connected to the inlet end outer casing base 3. The planetary reducer housing 6 is installed on the outer surface of the outlet end outer casing base 2 by bolts.

[0049] Optionally, the inner shell assembly includes an inner shell body 11, an outlet-end inner shell base 12, and an inlet-end inner shell base 13. The inner shell body 11 is a tubular structure. The outlet-end inner shell base 12 is installed at one end of the inner shell body 11, and the inlet-end inner shell base 13 is installed at the other end of the inner shell body 11. The inlet-end inner shell base 13 is rotatably connected inside the inlet-end outer shell base 3. The outlet-end inner shell base 12 is fixed to the outer periphery of the rectifier impeller shaft 14. The outer periphery of the outlet-end inner shell base 12 also has the structure of a rectifier impeller. The inlet-end inner shell base 13 is a sealed base.

[0050] The technical effect achieved by the above embodiments is that the assembly efficiency is significantly improved by the above-described structure of the inner shell assembly and the outer shell assembly.

[0051] Example 3

[0052] like Figures 1 to 20 As shown, a pump includes all the contents of Embodiment 2. In addition, the centrifugal impeller assembly includes a plurality of centrifugal impeller units 19, which are equally spaced on the centrifugal impeller shaft 18.

[0053] Optionally, the centrifugal impeller unit 19 includes a centrifugal disc and centrifugal radial blades. Multiple centrifugal radial blades are provided on the side of the centrifugal disc. The centrifugal radial blades extend in the radial direction of the centrifugal disc. The centrifugal disc is fixed on the outer periphery of the centrifugal impeller shaft 18. The outer diameter of the centrifugal disc is smaller than the outer diameter of the centrifugal radial blades.

[0054] Optionally, the rectifier impeller assembly includes multiple rectifier impeller units 15, which are equally spaced on the rectifier impeller shaft 14. The outer periphery of the rectifier impeller unit 15 is fixed to the inner wall of the inner shell body 11, and the rectifier impeller unit 15 and the centrifugal impeller unit 19 are arranged alternately.

[0055] Optionally, the rectifier impeller unit 15 includes a rectifier disk and rectifier radial blades. Multiple rectifier radial blades are provided on the side of the rectifier disk, and an inner hole for fluid to pass through is provided in the middle of the rectifier disk.

[0056] Optionally, the effective working outer diameter of the centrifugal radial blades and the rectifying radial blades must be the same.

[0057] The technical effects achieved by the above embodiments are as follows: through the above structure of the centrifugal impeller assembly and the rectifier impeller assembly, the operation is stable and friction loss is significantly reduced.

[0058] Example 4

[0059] like Figures 1 to 20 As shown, a pump includes all the contents of Embodiment 3, and further includes positioning grooves 16. The inner sidewall of the inner shell body 11 is provided with four positioning grooves 16, and the outer sidewall of each rectifier wheel is provided with four key bars, which are installed in the positioning grooves 16 respectively.

[0060] The technical effect achieved by the above embodiments is that by setting the positioning groove 16, the quick installation and replacement of the rectifier wheel is facilitated.

[0061] Example 5

[0062] like Figures 1 to 20 As shown, a pump includes all the contents of Embodiment 4, and further includes a first bearing 20, a second bearing 21, and a sealing ring 22; the input shaft 17 is rotatably connected to the planetary reducer housing 6 through the first bearing 20, the inlet end inner housing base 13 is rotatably connected to the inlet end outer housing base 3 through the second bearing 21, and a sealing ring 22 is provided at the rotatable contact point between the inlet end inner housing base 13 and the inlet end outer housing base 3.

[0063] It should be noted that, Figure 1 This illustration shows the centrifugal impeller shaft 18 fixed to the end face of the input shaft 17. Figure 2 The illustration shows the centrifugal impeller shaft 18 extending through the input shaft 17.

[0064] The technical effects achieved by the above embodiments are as follows: by setting the first bearing 20, the smoothness of the rotation of the input shaft 17 is improved; by setting the second bearing 21, the smoothness of the rotation of the inner shell base 13 at the inlet end is improved; and by setting the sealing ring 22, the sealing effect is improved.

[0065] The internal structure of the centrifugal pump in this device is basically the same as that of existing centrifugal pumps, consisting of a centrifugal impeller and a rectifier impeller forming a single-stage pump. However, the rectifier impeller in this device is not a stator but a moving impeller. Its working principle is as follows:

[0066] 1. The speed ratio of the planetary reducer creates a speed difference between the centrifugal impeller and the rectifier impeller, resulting in a pressure difference between the centrifugal forces of the two. This pressure difference is what makes a pump.

[0067] 2. The rotating mechanical energy of the fluid output by the centrifugal impeller directly impacts the rectifier impeller. Due to the speed difference between the two, the rectifier impeller directly absorbs most of the impact force and returns it directly to the input shaft, thus solving the problem of stator loss.

[0068] Working sequence: The engine drives the input shaft (planetary support) of the planetary reducer, which in turn drives the centrifugal impeller and the rectifier impeller. The rectifier impeller rotates at a lower speed than the centrifugal impeller, thus creating a bias pressure. The fluid enters through the inlet, passes through the centrifugal impeller, is discharged to the surrounding area, and is forced into the rectifier impeller. At this time, the high-speed rotating fluid has high mechanical energy and is absorbed by the low-speed rectifier impeller. This process is repeated for each stage, and the fluid is returned to the input shaft of the planetary reducer by the inner housing shaft to work together with the engine. The fluid is then discharged from the outlet.

[0069] The difference between this device and ordinary centrifugal pumps is that this device does not have a fixed stator. It generates centrifugal force by relying on the speed difference between the centrifugal impeller and the rectifier impeller. It is because of this structure that the pump body can be formed at the same time, and the rectifier impeller can absorb the mechanical energy of the centrifugal impeller and feed it back to the engine.

[0070] Another advantage during operation is that the rectifier impeller is driven in a 1:1 ratio, while the centrifugal impeller obtains power from the engine by increasing speed. Therefore, as the speed increases, the speed difference between the two increases, and vice versa. This difference will change exponentially with small changes in engine speed. In other words, when the centrifugal impeller encounters low pressure and high flow output, it will cause the engine speed to decrease, and the speed of the centrifugal impeller will decrease by a factor of a factor, thus making the engine less strained. When encountering high pressure and low flow output, it will cause the engine speed to increase, and the speed of the centrifugal impeller will increase exponentially. In this way, the engine will not encounter the dilemma of not being able to use the torque as in ordinary centrifugal pumps. Therefore, in complex working conditions, the operating principle of this device is more ideal than that of ordinary centrifugal pumps.

[0071] The main purpose of this device is to solve the mechanical energy loss of the stator in traditional single-stage or multi-stage centrifugal pumps. The feasibility of this technical solution is explained in detail below. The planetary reducer adopts a speed-increasing transmission method, driving the centrifugal impeller at multiple speeds and the rectifier impeller at a 1:1 speed ratio. Two impellers of the same shape and diameter have a speed difference, and the centrifugal force they generate also has a difference, thus forming a pump body. Although the engine drives the centrifugal impeller in a speed-increasing manner, driving several centrifugal impellers at a 1:1 speed ratio results in consistent power consumption and overall efficiency. Therefore, there is nothing wrong with this transmission method. The rotating fluid output by the centrifugal impeller does no work and accounts for most of the engine's power consumption. Its impact force is nearly equal to the torque output by the engine. Therefore, when the rotating fluid is forced into the rectifier impeller, it will directly impact the rectifier blades with a 1:1 impact force. Except for the stall caused by the differential speed (not loss), all the impact energy of the rectifier blades is absorbed and converted into torque. This torque is then transmitted through the inner casing shaft to the input shaft of the planetary reducer and mixed with the engine torque to do work. Since the rectifier impeller and the engine are driven in a 1:1 ratio, the torque of the rectifier impeller circuit and the engine torque are of the same nature. Therefore, the mixed torque has a direct effect. In this device, the rectifier impeller is not used for diffusion but simply to absorb the mechanical energy output by the centrifugal impeller. It is precisely because of this that the engine can drive the centrifugal impeller at a multi-fold speed without feeling insufficient power. Therefore, it has the characteristics of large flow rate, high head, and low power consumption.

[0072] As can be seen from the above, the planetary reducer of this device is actually a speed increaser transmission structure that can drive the centrifugal impeller at a ratio of 1:3 to 1:10. This increases the boost pressure and flow base of each stage of the centrifugal impeller by several times, thereby reducing the number of stages. The rectifier impeller is always driven at a ratio of 1:1, so that the feedback torque is of the same nature as the engine torque. This allows the engine to have enough power to drive the centrifugal impeller in a speed-increasing manner. In other words, even if the engine drives the centrifugal impeller at a speed many times higher, the output torque will also return to the engine. This is equivalent to the engine driving the centrifugal impeller with a torque ratio of 1:1.

[0073] During implementation, it should be considered that the speed ratio of the planetary reducer must match the power of the engine. This is because this technology uses the difference between the rectifier impeller and the centrifugal impeller to form pump pressure and flow. The higher the speed ratio, the greater the difference between the two and the greater the flow rate, which requires a larger engine power. Conversely, the lower the speed ratio, the smaller the required engine power. However, the speed ratio can be adjusted according to the engine power and the number of stages and diameter of the pump body. It should be clarified here that the size of the difference value will not affect the working efficiency, only whether the working environment is suitable.

[0074] The technical solution provided by this device is a basic principle machine, which aims to solve the mechanical energy loss caused by stator diffusion or rectification in all pump bodies with the same mechanism as centrifugal pumps. Therefore, the pump body structure of this device does not have a fixed design shape depending on the application. The principle is explained by taking the more complex multi-stage centrifugal pump as an example. This technical solution is suitable for conventional single-stage pumps, multi-stage pumps, deep-water pumps, long-distance pumps, and axial flow compressors (fan-type pump bodies). The pump body structure of the axial flow compressor is also a conventional structure, and the implementation principle is consistent with the technical solution provided by this device.

[0075] In the description of this invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 invention and simplifying the description, and are not intended to 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 invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0080] In the description of this specification, the references to terms such as "Embodiment 1," "Embodiment 2," "Example," "Specific Example," or "Some Examples," etc., indicate that the specific method, apparatus, or feature described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, methods, apparatus, or features described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pump, characterized in that, It includes a housing assembly, an inner housing assembly, a planetary reducer assembly, a fluid inlet (4), a fluid outlet (5), an input shaft (17), a centrifugal impeller shaft (18), a rectifier impeller shaft (14), a centrifugal impeller assembly, and a rectifier impeller assembly; The planetary reducer assembly includes a planetary reducer housing (6), an external gear ring (7), a planet carrier (9), planetary gears (10), and a sun gear (8); The planetary reducer housing (6) is connected to the outlet end of the housing assembly, the inlet end of the housing assembly is provided with the fluid inlet (4), and the outer periphery of the outlet end of the housing assembly is provided with the fluid outlet (5). The outer shell assembly is sleeved on the outer periphery of the inner shell assembly. The inner shell assembly rotates relative to the outer shell assembly. The inner shell assembly is fixed on the outer periphery of the rectifier impeller shaft (14). The outlet end of the rectifier impeller shaft (14) is fixedly connected to the planetary carrier (9). The rectifier impeller assembly is installed on the outer periphery of the rectifier impeller shaft (14). The outer periphery of the rectifier impeller assembly is fixed on the inner wall of the inner shell assembly. The centrifugal impeller shaft (18) passes through the rectifier impeller shaft (14), the centrifugal impeller shaft (18) rotates relative to the rectifier impeller shaft (14), the end of the centrifugal impeller shaft (18) is fixedly connected to the sun gear (8), and the centrifugal impeller assembly is installed on the outer periphery of the centrifugal impeller shaft (18). The centrifugal impeller assembly is located within the rectifier impeller assembly and rotates relative to the rectifier impeller assembly. The end of the centrifugal impeller shaft (18) is connected to the input shaft (17), and the input shaft (17) is rotatably connected in the planetary reducer housing (6).

2. The pump according to claim 1, characterized in that, The outer shell assembly includes an outer shell body (1), an outlet end outer shell base (2), and an inlet end outer shell base (3); the outer shell body (1) is a tubular structure, one end of the outer shell body (1) is equipped with the outlet end outer shell base (2), the other end of the outer shell body (1) is equipped with the inlet end outer shell base (3), the middle part of the inlet end outer shell base (3) is provided with the fluid inlet (4) communicating with the inner shell body (1), the outer side wall of the outer shell body (1) near the outlet end outer shell base (2) is provided with the fluid outlet (5), and the end of the inner shell assembly is rotatably connected to the inlet end outer shell base (3).

3. A pump according to claim 2, characterized in that, The inner shell assembly includes an inner shell body (11), an outlet end inner shell base (12), and an inlet end inner shell base (13). The inner shell body (11) is a tubular structure. The outlet end inner shell base (12) is installed at one end of the inner shell body (11), and the inlet end inner shell base (13) is installed at the other end of the inner shell body (11). The inlet end inner shell base (13) is rotatably connected inside the inlet end outer shell base (3), and the outlet end inner shell base (12) is fixed to the outer periphery of the rectifier impeller shaft (14).

4. A pump according to claim 3, characterized in that, The centrifugal impeller assembly includes multiple centrifugal impeller units (19), which are equally spaced on the centrifugal impeller shaft (18).

5. A pump according to claim 4, characterized in that, The centrifugal impeller unit (19) includes a centrifugal disc and centrifugal radial blades. The centrifugal disc has multiple centrifugal radial blades on its side. The centrifugal radial blades extend along the radial direction of the centrifugal disc. The centrifugal disc is fixed to the outer periphery of the centrifugal impeller shaft (18). The outer diameter of the centrifugal disc is smaller than the outer diameter of the centrifugal radial blades.

6. A pump according to claim 5, characterized in that, The rectifier impeller assembly includes multiple rectifier impeller units (15), which are equally spaced on the rectifier impeller shaft (14). The outer periphery of each rectifier impeller unit (15) is fixed to the inner wall of the inner shell body (11), and the rectifier impeller units (15) and the centrifugal impeller units (19) are staggered.

7. A pump according to claim 6, characterized in that, The rectifier impeller unit (15) includes a rectifier disk and rectifier radial blades. The rectifier disk has multiple rectifier radial blades on its side and an inner hole for fluid passage in the middle.

8. A pump according to claim 7, characterized in that, The effective working outer diameter of the centrifugal radial blade and the rectifier radial blade must be the same.

9. A pump according to claim 8, characterized in that, It also includes positioning grooves (16) and key bars. The inner sidewall of the inner shell body (11) is provided with four positioning grooves (16), and the outer sidewall of each rectifier wheel is provided with four key bars, which are installed in the positioning grooves (16).

10. A pump according to claim 9, characterized in that, It also includes a first bearing (20), a second bearing (21), and a sealing ring (22); the input shaft (17) is rotatably connected to the planetary reducer housing (6) through the first bearing (20), the inlet end inner housing base (13) is rotatably connected to the inlet end outer housing base (3) through the second bearing (21), and the sealing ring (22) is provided at the rotatable contact point between the inlet end inner housing base (13) and the inlet end outer housing base (3).

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