Impeller pump

Abstract

The utility model relates to the technical field of impeller pumps, in particular to an impeller pump. The impeller pump comprises a front shell, a rear shell, an impeller and a baffle. A first groove is formed in the side, facing the first direction, of the front shell, and a water outlet pipe is arranged on the side, perpendicular to the first direction, of the front shell and communicates with the first groove. The rear shell is arranged on the side, facing the first direction, of the front shell, and a pump cavity is defined by the rear shell and the first groove; the impeller is rotatably arranged in the pump cavity around a first axis, and the first axis is parallel to the first direction; the baffle is arranged between the rear shell and the impeller. The cavity between the impeller and the rear shell is filled with the baffle, the problem that the thickness of the pump cavity is not matched with the thickness of the impeller is solved, and the output power of the impeller pump is improved.

Description

Technical Field

[0001] This application relates to the technical field of impeller pumps, and particularly to an impeller pump. Background Art

[0002] An impeller pump is a common industrial pump, widely used for liquid transportation and pressure increase. According to different working principles and applications, impeller pumps include several different types such as centrifugal, mixed-flow, axial-flow, and vortex types. The two major hydraulic components of an impeller pump are the impeller and the housing. The housing includes a front housing and a rear housing. The front housing and the rear housing enclose to form a pump chamber. The two ends of the impeller along the axial direction are respectively rotatably connected to the front housing and the rear housing, so that the impeller is rotatably installed in the pump chamber.

[0003] The front housing is in the shape of a cylinder with an opening at one end. The water outlet pipe is arranged on the outer peripheral surface of the front housing. Therefore, the inner wall of the water outlet pipe is spaced from the rear housing. And when observing along the radial direction of the impeller, the cavity in the water outlet pipe corresponds to the impeller. Thus, there is a relatively large cavity between the end face of the impeller and the rear housing, making the thickness of the pump chamber not match the thickness of the impeller along the axial direction of the impeller, reducing the output power of the impeller pump. Utility Model Content

[0004] The embodiments of this application aim to provide an impeller pump that can at least improve the output power of the impeller pump.

[0005] The embodiments of this application solve the above technical problems by adopting the following technical solutions:

[0006] In a first aspect, the embodiments of this application provide an impeller pump, which includes a front housing, a rear housing, an impeller, and a baffle. A first groove is provided on one side of the front housing facing the first direction, and a water outlet pipe is provided on one side of the front housing perpendicular to the first direction. The water outlet pipe is communicated with the first groove; the rear housing is arranged on the side of the front housing facing the first direction, and the rear housing and the first groove enclose to form a pump chamber; the impeller is rotatably arranged in the pump chamber around a first axis, and the first axis is parallel to the first direction; the baffle is arranged between the rear housing and the impeller.

[0007] In some embodiments, the baffle is in a ring shape and surrounds the first axis.

[0008] In some embodiments, the first groove extends along the first axis. When observing along the first direction, the baffle is adapted to the first groove.

[0009] In some embodiments, the first groove includes a cylindrical body region and a diversion region. The cylindrical body region is cylindrical and extends along the first axis. The diversion region surrounds the cylindrical body region circumferentially. Along the circumferential direction of the cylindrical body region, the width of the diversion region gradually increases in the radial direction of the cylindrical body region until the diversion region communicates with the water outlet pipe.

[0010] In some embodiments, the baffle includes an annular portion and an extending portion. The extending portion is connected to the outer peripheral surface of the annular portion. When observed in the first direction, the projection of the annular portion coincides with the projection of the cylindrical body region, and the projection of the extending portion coincides with the projection of the diversion region.

[0011] In some embodiments, a second groove is provided on the side of the rear shell facing the front shell. The second groove communicates with the first groove and is cylindrical and extends along the first axis. The impeller pump further includes a rotor rotatably disposed in the second groove. The rotor is in transmission connection with the impeller and is used to drive the impeller to rotate. The inner diameter of the baffle is greater than or equal to the inner diameter of the second groove.

[0012] In some embodiments, a third groove is provided on the side of the rear shell facing the first direction. The third groove surrounds the second groove around the first axis. The impeller pump further includes an electromagnet disposed in the third groove. The rotor includes a permanent magnet, and the electromagnet is used to drive the rotor to rotate relative to the rear shell.

[0013] In some embodiments, the baffle is detachably connected to the rear shell. Both the baffle and the front shell include multiple models, and each model of the baffle is adapted to the first groove of one model of the front shell.

[0014] In some embodiments, the rear shell is provided with a first mounting hole, and the baffle is provided with a second mounting hole. The impeller pump further includes a first fastener that passes through the second mounting hole and is detachably connected to the first mounting hole to detachably connect the baffle to the rear shell.

[0015] In some embodiments, the number of the first mounting holes is multiple. The multiple first mounting holes are arranged in a non-rotationally symmetric manner around the first axis. The number of the second mounting holes and the first fasteners are both multiple. The position of each second mounting hole corresponds to the position of one first mounting hole, and each first fastener passes through one second mounting hole and is detachably connected to one first mounting hole.

[0016] The impeller pump according to the embodiments of the present application fills the cavity between the impeller and the rear shell through the baffle, improves the problem that the thickness of the pump cavity does not match the thickness of the impeller, and improves the output power of the impeller pump.

[0017] The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the content of the specification. In order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specific embodiments of the present application are given. Description of the Drawings

[0018] One or more embodiments are exemplarily illustrated by the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0019] Figure 1 is a schematic structural view of the impeller pump according to an embodiment of the present application;

[0020] Figure 2 is an exploded view of the impeller pump according to an embodiment of the present application;

[0021] Figure 3 is an exploded view of the impeller pump from another perspective according to an embodiment of the present application;

[0022] Figure 4 is a cross-sectional view of the impeller pump according to an embodiment of the present application;

[0023] Figure 5 is Figure 3 a schematic structural view of the cooperation between the front housing and the baffle in

[0024] Figure 6 is Figure 5 a right view of the front housing in

[0025] Figure 7 is Figure 2 a left view of the rear housing in

[0026] A three-dimensional schematic view of an embodiment of the present application.

[0027] The reference numerals in the drawings in the specific embodiments are as follows:

[0028] 100, impeller pump;

[0029] 1, front housing; 11, first groove; 111, cylindrical body area; 112, diversion area; 12, water outlet pipe; 13, water inlet pipe;

[0030] 2, rear housing; 21, second groove; 22, third groove; 23, first mounting hole;

[0031] Q, pump chamber;

[0032] 3, impeller;

[0033] 4. Baffle; 41. Ring portion; 411. Second mounting hole; 42. Extension portion;

[0034] 5. Rotor; 51. Rotating shaft; 52. Permanent magnet;

[0035] 6. Electromagnet;

[0036] 7. Cover plate;

[0037] 8. Sealing ring;

[0038] X. First direction. Detailed implementation manners

[0039] For the convenience of understanding the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above terms have no special meaning, and therefore cannot be understood as a limitation on the protection scope of this application. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the related listed items.

[0044] In addition, the technical features involved in different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0045] An embodiment of this application provides an impeller pump 100. Please refer to Figures 1 to 4 , the impeller pump 100 includes a front housing 1, a rear housing 2, and an impeller 3. A first groove 11 is provided on one side of the front housing 1 facing the first direction X, and a water outlet pipe 12 is provided on one side of the front housing 1 perpendicular to the first direction X. The water outlet pipe 12 communicates with the first groove 11; the rear housing 2 is provided on the side of the front housing 1 facing the first direction X, and the rear housing 2 and the first groove 11 enclose a pump chamber Q; the impeller 3 is rotatably arranged in the pump chamber Q around a first axis, and the first axis is parallel to the first direction X. It can be understood that since the water outlet pipe 12 has a wall thickness, along the first direction X, the cavity of the water outlet pipe 12 is spaced from the rear housing 2. And along the direction perpendicular to the first direction X, the cavity in the water outlet pipe 12 corresponds to the impeller 3 to ensure the matching of the impeller 3 and the water outlet pipe 12. Therefore, along the first direction X, the impeller 3 is spaced from the rear housing 2, resulting in a relatively large cavity between the impeller 3 and the rear housing 2, causing the thickness of the pump chamber Q not to match the thickness of the impeller 3, and further reducing the output power of the impeller pump 100. Optionally, the front housing 1 and the rear housing 2 are detachably connected by screws.

[0046] To improve this problem, please refer to Figures 2 to 4 , the impeller pump 100 further includes a baffle 4, and the baffle 4 is arranged between the rear housing 2 and the impeller 3. By filling the cavity between the impeller 3 and the rear housing 2 with the baffle 4, the problem of the mismatch between the thickness of the pump chamber Q and the thickness of the impeller 3 is improved, and the output power of the impeller pump 100 is increased. Among them, the baffle 4 can be in various shapes, such as fan-shaped sheet, triangular sheet, or fan-shaped ring sheet, etc.; the number of the baffles 4 can be multiple, and the multiple baffles 4 are arranged around the first axis. In the embodiment of this application, taking the baffle 4 being annular as an example for radial description, it can be understood that the baffle 4 surrounds the first axis.

[0047] Regarding the above-mentioned front housing 1, please refer to Figures 2 to 4, the front housing 1 is also provided with a water inlet pipe 13, and the water inlet pipe 13 communicates with the first groove 11. Thus, the impeller pump 100 can suck the liquid from the water inlet pipe 13 into the pump chamber Q and discharge it from the water outlet pipe 12 to realize the pumping of the liquid. In some embodiments, the water inlet pipe 13 extends along the first axis, that is, the water inlet pipe 13 guides the liquid to the middle of the impeller 3, and the impeller 3 drives the liquid to the outer periphery of the impeller 3 and discharges it from the water outlet pipe 12. That is, the impeller pump 100 in this embodiment is a centrifugal pump. In some embodiments, the water inlet pipe 13 is located on one side of the front housing 1 perpendicular to the first direction X, that is, the water inlet pipe 13 guides the liquid to the outer periphery of the impeller 3, and the impeller pump 100 in this embodiment is a vortex pump. In some other embodiments, the impeller pump 100 can also be an axial flow pump, a mixed flow pump, etc.

[0048] For the above-mentioned baffle 4, please refer to Figure 5 , in some embodiments, the first groove 11 extends along the first axis. When observed along the first direction X, the baffle 4 is adapted to the first groove 11. For example, along a direction perpendicular to the first direction X, there is a preset gap between the edge of the baffle 4 and the edge of the inner wall of the first groove, and the preset gap can be 0 to 3 mm to increase the volume of the baffle 4 filling the cavity between the impeller 3 and the rear housing 2 and enhance the filling effect.

[0049] In some embodiments, please refer to Figure 6 , the first groove 11 includes a cylindrical body area 111 and a diversion area 112. The cylindrical body area 111 is cylindrical and extends along the first axis, and the diversion area 112 surrounds the cylindrical body area 111 along the circumferential direction of the cylindrical body area 111; along the circumferential direction of the cylindrical body area 111, the width of the diversion area 112 along the radial direction of the cylindrical body area 111 gradually increases until the diversion area 112 communicates with the water outlet pipe 12. It can be understood that the diversion area 112 is in the shape of a wedge-shaped cavity surrounding the cylindrical body area 111, and the end with the largest width of the wedge-shaped cavity along the radial direction of the cylindrical body area 111 communicates with the water outlet pipe 12. The diversion area 112 is used to guide the liquid into the water outlet pipe 12 and can make the flow direction of the liquid therein gradually change to the axial direction of the water outlet pipe 12; at the same time, along the circumferential direction of the cylindrical body area 111, the liquid in the cylindrical body area 111 gradually enters the diversion area 112, that is, along the circumferential direction of the cylindrical body area 111, the liquid in the diversion area 112 gradually increases, thereby reducing the resistance of the liquid flowing from the first groove 11 into the water outlet pipe 12.

[0050] Correspondingly, please refer to Figure 5, the baffle 4 includes an annular portion 41 and an extension portion 42. The extension portion 42 is connected to the outer peripheral surface of the annular portion 41. When observed in the first direction X, the projection of the annular portion 41 coincides with the projection of the cylindrical body region 111, and the projection of the extension portion 42 coincides with the projection of the diversion region 112. Among them, the outer diameter of the annular portion 41 is equal to the outer diameter of the cylindrical body region 111. The annular portion 41 is used to fill the cavity between the impeller 3 and the rear housing 2. The extension portion 42 is used to fill a part of the cavity on the side of the extension region close to the rear housing 2, reducing the resistance of the liquid entering the water outlet pipe 12 from the extension region.

[0051] For the above-mentioned rear housing 2, in some embodiments, please refer to Figures 2 to 4 , a second groove 21 is provided on the side of the rear housing 2 facing the front housing 1. The second groove 21 communicates with the first groove 11. The second groove 21 is cylindrical and extends along the first axis. The impeller pump 100 further includes a rotor 5. The rotor 5 is rotatably arranged in the second groove 21. The rotor 5 is in transmission connection with the impeller 3. The rotor 5 is used to drive the impeller 3 to rotate. One end of the rotor 5 is connected to the impeller 3, and the other end of the rotor 5 is rotatably connected to the bottom of the second groove 21, that is, one end of the impeller 3 is rotatably connected to the rear housing 2. It can be understood that the rotation axis of the rotor 5 coincides with the first axis.

[0052] In some embodiments, the inner diameter of the baffle 4 is greater than or equal to the inner diameter of the second groove 21, so that the rotor 5 can pass through the through hole in the center of the baffle 4, and the baffle 4 does not affect the disassembly and assembly of the rotor 5. In this embodiment, the rotor 5 and the impeller 3 can be integrally formed, so that the baffle 4 does not affect the installation of the rotor 5 in the second groove 21.

[0053] In some embodiments, please refer to Figures 2 to 4 , a third groove 22 is provided on the side of the rear housing 2 facing the first direction X. Around the first axis, the third groove 22 surrounds the second groove 21. The impeller pump 100 further includes an electromagnet 6. The electromagnet 6 is arranged in the third groove 22. The rotor 5 includes a permanent magnet 52. The electromagnet 6 is used to drive the rotor 5 to rotate relative to the rear housing 2. The electromagnet 6 can generate a changing magnetic field, and then drive the rotor 5 with the permanent magnet 52 to rotate. The permanent magnet 52 can be alnico magnet, ferrite magnet, neodymium iron boron magnet, sintered neodymium iron boron, etc. Since the third groove 22 is spaced from the second groove 21, the liquid in the second groove 21 will not contact the electromagnet 6, and the electromagnet 6 does not need to be waterproofed, which is beneficial to reducing the production cost of the impeller pump 100. It can be understood that at least part of the third groove 22 is annular.

[0054] In some embodiments, please refer to Figure 4 , the rotor 5 includes a rotating shaft 51. One end of the rotating shaft 51 passes through the impeller 3 and is rotatably connected to the front housing 1. The other end of the rotating shaft 51 is rotatably connected to the bottom of the second groove 21. Among them, the permanent magnet 52 is sleeved on the rotating shaft 51.

[0055] In some embodiments, referring to Figures 2 to 4 , the impeller pump 100 further includes a cover plate 7, which is covered on one side of the rear housing 2 facing the first direction X. The cover plate 7 is used to separate the third groove 22 from the external environment, which is beneficial to extending the service life of the electromagnet 6. Optionally, a sealing ring 8, such as a rubber ring, is provided between the cover plate 7 and the rear housing 2 to enhance the sealing effect of the third groove 22.

[0056] In some embodiments, the baffle 4 is detachably connected to the rear housing 2. Both the baffle 4 and the front housing 1 include multiple models, and each model of the baffle 4 is adapted to the first groove 11 of one model of the front housing 1. It can be understood that for different models of the front housing 1, the shape and / or size of the first groove 11 are different. Therefore, the baffle 4 needs to be adapted to it, so that the baffle 4 has multiple models corresponding to different models of the front housing 1. Since the baffle 4 is detachably connected to the rear housing 2, the corresponding model of the baffle 4 can be replaced according to the model of the front housing 1. Furthermore, multiple models of the front housing 1 can share one model of the rear housing 2, which is beneficial to reducing the production cost of the rear housing 2. And the rear housing 2 is usually made of plastic and manufactured by an injection molding process, which can reduce the mold opening cost of the rear housing 2.

[0057] In some embodiments, referring to Figure 2 , the rear housing 2 is provided with a first mounting hole 23, and the baffle 4 is provided with a second mounting hole 411; the impeller pump 100 further includes a first fastener (not shown), and the first fastener passes through the second mounting hole 411 and is detachably connected to the first mounting hole 23 to detachably connect the baffle 4 to the rear housing 2. Among them, the first fastener can be a screw, and the first mounting hole 23 can be a threaded hole, so as to detachably mount the baffle 4 on the rear housing 2. Optionally, the second mounting hole 411 is located in the ring portion 41.

[0058] Furthermore, the number of the first mounting holes 23, the second mounting holes 411 and the first fasteners are all multiple. The position of each second mounting hole 411 corresponds to the position of one first mounting hole 23, and each first fastener passes through one second mounting hole 411 and is detachably connected to one first mounting hole 23. Connecting the baffle 4 to the rear housing 2 through multiple first fasteners is beneficial to enhancing the connection strength between the baffle 4 and the rear housing 2.

[0059] Particularly, in some embodiments, around the first axis, the multiple first mounting holes 23 are arranged in a non-rotationally symmetric manner. It can be understood that a rotationally symmetric figure refers to a figure that has a center of symmetry and can coincide with the original figure after rotating a certain angle around the center of symmetry. Similarly, a rotationally symmetric arrangement means that the multiple first mounting holes 23 arranged have a center of symmetry, and the multiple first mounting holes 23 can coincide with the original multiple first mounting holes 23 after rotating a certain angle around the center of symmetry. In this embodiment, however, the multiple first mounting holes 23 are arranged in a non-rotationally symmetric manner; for example, referring to Figure 2, among the quadrilateral formed by connecting the four first mounting holes 23, the four side lengths are not equal to each other; thus, when the baffle 4 is mounted on the rear housing 2, if the baffle 4 is rotated by any angle around the first axis, the baffle 4 cannot be mounted on the rear housing 2, that is, the mounting angle of the baffle 4 around the first axis when mounted on the rear housing 2 is unique, which is beneficial to improving the problem of incorrect mounting angle when the baffle 4 is mounted on the rear housing 2.

[0060] In the impeller pump 100 of the embodiment of the present application, the cavity between the impeller 3 and the rear housing 2 is filled with the baffle 4 to improve the problem that the thickness of the pump chamber Q does not match the thickness of the impeller 3, and the output power of the impeller pump 100 is increased. The first groove 11 includes a diversion area 112, which is beneficial to reducing the resistance of the liquid flowing from the first groove 11 into the water outlet pipe 12; correspondingly, the baffle 4 includes an extension part 42, which is beneficial to reducing the resistance of the liquid flowing from the extension area into the water outlet pipe 12. The third groove 22 is spaced from the second groove 21. The third groove 22 is used to accommodate the electromagnet 6, and the second groove 21 is used to accommodate the rotor 5. Thus, the electromagnet 6 does not need to be waterproofed, which is beneficial to reducing the production cost of the impeller pump 100. The baffle 4 is detachably connected to the rear housing 2. Both the baffle 4 and the front housing 1 include multiple models, and multiple models of the front housing 1 can be compatible with one model of the rear housing 2, which is beneficial to reducing the production cost of the rear housing 2. The multiple first mounting holes 23 are arranged in a non-rotationally symmetric manner, which is beneficial to improving the problem of incorrect mounting angle when the baffle 4 is mounted on the rear housing 2.

[0061] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above. For the sake of simplicity, they are not provided in detail; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An impeller pump, characterized in that, Comprising: A front shell, on one side facing the first direction, a first groove is provided, and on one side perpendicular to the first direction, a water outlet pipe is provided, and the water outlet pipe is communicated with the first groove; A rear shell, arranged on the side of the front shell facing the first direction, and the rear shell and the first groove enclose a pump chamber; An impeller, rotatably arranged in the pump chamber around a first axis, and the first axis is parallel to the first direction; A baffle, arranged between the rear shell and the impeller.

2. The impeller pump according to claim 1, characterized in that, The baffle is annular, and the baffle surrounds the first axis.

3. The impeller pump according to claim 2, wherein The first groove extends along the first axis, and when observed in the first direction, the baffle is adapted to the first groove.

4. The impeller pump according to claim 3, characterized in that, The first groove includes a cylindrical body area and a diversion area, the cylindrical body area is cylindrical and extends along the first axis, and the diversion area surrounds the cylindrical body area along the circumferential direction of the cylindrical body area; Along the circumferential direction of the cylindrical body area, the width of the diversion area gradually increases along the radial direction of the cylindrical body area until the diversion area is communicated with the water outlet pipe.

5. The impeller pump according to claim 4, characterized in that, The baffle includes an annular portion and an extension portion, and the extension portion is connected to the outer peripheral surface of the annular portion; When observed in the first direction, the projection of the annular portion coincides with the projection of the cylindrical body area, and the projection of the extension portion coincides with the projection of the diversion area.

6. The impeller pump according to claim 2, characterized in that, On the side of the rear shell facing the front shell, a second groove is provided, the second groove is communicated with the first groove, and the second groove is cylindrical and extends along the first axis; The impeller pump further includes a rotor, the rotor is rotatably arranged in the second groove, the rotor is in transmission connection with the impeller, and the rotor is used to drive the impeller to rotate; The inner diameter of the baffle is greater than or equal to the inner diameter of the second groove.

7. The impeller pump according to claim 6, wherein On the side of the rear shell facing the first direction, a third groove is provided, and the third groove surrounds the second groove around the first axis; The impeller pump further includes an electromagnet, the electromagnet is arranged in the third groove, the rotor includes a permanent magnet, and the electromagnet is used to drive the rotor to rotate relative to the rear shell.

8. The impeller pump according to claim 1, wherein, The baffle is detachably connected to the rear shell, both the baffle and the front shell include multiple models, and each model of the baffle is adapted to the first groove of one model of the front shell.

9. The impeller pump according to claim 8, characterized in that, The rear shell is provided with a first mounting hole, and the baffle is provided with a second mounting hole; The impeller pump further includes a first fastener, the first fastener passes through the second mounting hole and is detachably connected to the first mounting hole to detachably connect the baffle to the rear shell.

10. The impeller pump according to claim 9, characterized in that, The number of the first mounting holes is multiple, and around the first axis, the multiple first mounting holes are arranged in a non-rotationally symmetric manner; The number of the second mounting holes and the first fasteners are both multiple, the position of each second mounting hole corresponds to the position of a first mounting hole, and each first fastener passes through a second mounting hole and is detachably connected to a first mounting hole.

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