Centrifugal pump and movable platform

Abstract

This application provides a centrifugal pump and a movable platform having the same. The centrifugal pump has a transition chamber and a working chamber. Fluid medium flowing in from the inlet of the centrifugal pump sequentially passes through the transition chamber and the working chamber and flows out from the outlet of the centrifugal pump. The centrifugal pump includes an impeller with blades disposed within the working chamber. The fluid medium needs to flow into the transition chamber first and then into the working chamber where the blades are located. This means that the output flow rate of the centrifugal pump can be controlled by controlling the flow rate of the fluid medium flowing from the transition chamber into the working chamber. When pressurized fluid medium flows in, the fluid medium can be output at a lower flow rate by reducing the flow rate of the fluid medium flowing from the transition chamber into the working chamber. Therefore, the centrifugal pump provided in this application embodiment can achieve a lower flow rate output of the fluid medium even when the incoming fluid medium is pressurized.

Description

Technical Field

[0001] This application relates to the field of pump technology, and more specifically to a centrifugal pump and a mobile platform having thereon. Background Technology

[0002] Centrifugal pumps are devices that transport or pressurize fluid media. They have many advantages such as small size, simple operation and long service life, and are therefore widely used in various fields.

[0003] Centrifugal pumps operate by using the rotation of an impeller with multiple blades to induce centrifugal motion in the fluid medium. The rotating impeller forces the fluid medium filling the space between the blades to rotate, and under the action of centrifugal force, the fluid medium moves from the center of the impeller to the outer periphery. During this movement, the fluid medium gains momentum, resulting in increased static pressure energy and increased flow velocity, thereby achieving the transportation or pressurization of the fluid medium.

[0004] In certain applications, the fluid medium flowing into a centrifugal pump is pressurized. In this situation, traditional centrifugal pumps cannot output the fluid medium at a lower flow rate. Specifically, for a traditional centrifugal pump, when a pressurized fluid medium flows into the pump, even if the impeller stops rotating, the fluid medium will still flow out of the pump under pressure, meaning a flow rate is generated. If the flow rate generated by the pressure of the fluid medium is greater than the actual required flow rate, the traditional centrifugal pump cannot reduce the output flow rate to meet the demand; that is, the traditional centrifugal pump cannot reduce the output flow rate to less than the flow rate generated by the pressure of the fluid medium. Summary of the Invention

[0005] This application relates to a centrifugal pump. The centrifugal pump has a transition chamber and a working chamber. A fluid medium flowing in from the inlet of the centrifugal pump passes sequentially through the transition chamber and the working chamber and flows out from the outlet of the centrifugal pump. The centrifugal pump includes an impeller with blades disposed within the working chamber.

[0006] The fluid medium needs to flow into the transition chamber first and then into the working chamber where the blades are located. This means that the output flow rate of the centrifugal pump can be controlled by controlling the flow rate of the fluid medium flowing from the transition chamber into the working chamber. When a pressurized fluid medium flows in, the fluid medium can be output at a lower flow rate by reducing the flow rate of the fluid medium flowing from the transition chamber into the working chamber. Therefore, the centrifugal pump provided in this application embodiment can achieve a lower flow rate output of the fluid medium even when the inflowing fluid medium is pressurized.

[0007] In some embodiments, between the transition cavity and the working cavity, a first partition wall and a second partition wall are sequentially provided starting from the transition cavity. The first partition wall and the second partition wall separate the transition cavity and the working cavity. The first partition wall is provided with a first through hole, and the second partition wall is provided with a second through hole. The first partition wall does not rotate with the impeller, while the second partition wall rotates with the impeller. The first through hole and the second through hole are periodically aligned as the impeller rotates.

[0008] When the first and second through holes are aligned, the fluid medium can flow from the transition cavity into the working cavity through the first and second through holes. When the first and second through holes are misaligned, the first and second partition walls can prevent the fluid medium from flowing from the transition cavity into the working cavity.

[0009] When the impeller rotates at a higher speed, the first and second through holes align more frequently, resulting in a larger volume of fluid flowing from the transition chamber into the working chamber per unit time. Conversely, when the impeller rotates at a lower speed, the first and second through holes align less frequently, resulting in a smaller volume of fluid flowing from the transition chamber into the working chamber per unit time. Therefore, the flow rate of the fluid from the transition chamber into the working chamber can be adjusted by controlling the impeller's rotational speed.

[0010] In this way, the flow rate of the fluid medium from the transition chamber to the working chamber can be adjusted by controlling the impeller speed. Thus, when pressurized fluid medium flows into the centrifugal pump, the flow rate of the fluid medium from the transition chamber to the working chamber can be reduced by decreasing the impeller speed, thereby achieving a lower flow rate output of the fluid medium.

[0011] In some embodiments, both the first partition wall and the second partition wall are cylindrical, and the second partition wall is sleeved on the first partition wall, thereby forming the transition cavity on the inner circumferential side of the first partition wall and the working cavity on the outer circumferential side of the second partition wall.

[0012] Both the first and second partition walls are cylindrical, with the second partition wall fitted over the first partition wall. This allows a transition cavity to be formed on the inner circumference of the first partition wall and a working cavity to be formed on the outer circumference of the second partition wall. Furthermore, by making the first and second partition walls cylindrical, the first and second through holes on them can be periodically aligned when they rotate relative to each other.

[0013] In some embodiments, the blade is disposed on the outer periphery of the second partition wall, and an imaginary straight line extending radially along the second partition wall and passing through the second through hole intersects the blade.

[0014] Considering that when the second through-hole and the first through-hole are aligned, the fluid medium will flow radially into the working chamber along the second partition wall, the above implementation allows the fluid medium flowing out of the second through-hole to directly flow onto the blades, thus directly following the blade movement. If the fluid medium does not flow directly onto the blades but flows out of the impeller through the gap between adjacent impellers, it will not gain sufficient momentum, which will reduce the mechanical efficiency of the centrifugal pump. Therefore, the above implementation can improve the mechanical efficiency of the centrifugal pump.

[0015] In some embodiments, the second partition wall forms part of the impeller, or the second partition wall is fixedly connected to the impeller.

[0016] Integrating the second partition wall into the impeller ensures that the second partition wall rotates with the impeller, and eliminates the need for a separate component to form the second partition wall. This simplifies the structure of the centrifugal pump, promotes its lightweight design, reduces manufacturing costs, and makes it easier to assemble and disassemble.

[0017] In some embodiments, the outer peripheral surface of the first partition wall is in contact with the inner peripheral surface of the second partition wall.

[0018] Since the outer peripheral surface of the first partition wall is in contact with the inner peripheral surface of the second partition wall, when the first through hole and the second through hole are not aligned, the cooperation between the first partition wall and the second partition wall can prevent or reduce the flow of fluid medium from the transition cavity into the working cavity through the gap between them.

[0019] In some embodiments, the centrifugal pump further includes a pump housing and a pump cover, the pump cover being disposed on the pump housing and cooperating with the pump housing to define an internal space, the first partition wall and the second partition wall dividing the internal space into the transition chamber and the working chamber, the first partition wall being fixedly connected to or integrally formed with the pump cover, the inlet of the centrifugal pump being formed on the pump cover, the outlet of the centrifugal pump being formed on the pump housing, and the first partition wall surrounding the inlet of the centrifugal pump.

[0020] By integrally forming or fixing the first partition wall with the pump cover, it can be ensured that the first partition wall will not rotate with the second partition wall, and this implementation method is simple in structure and easy to disassemble and assemble. By placing the inlet on the pump cover and placing the first partition wall on the outer periphery of the inlet, the fluid medium flowing in from the inlet can flow directly into the transition chamber.

[0021] In some embodiments, the first through hole is located at the end of the first partition wall away from the pump cover.

[0022] Considering that the centrifugal pump is usually placed with the pump cover facing upwards during use, placing the first through hole at the end of the first partition wall furthest from the pump cover ensures that the first through hole is located at the bottom of the transition chamber during use. This facilitates the drainage of the fluid medium from the transition chamber and prevents fluid medium from accumulating in the transition chamber when not in use. Long-term accumulation of fluid medium in the transition chamber can damage the centrifugal pump and reduce its service life.

[0023] In some embodiments, one of the pump housing and the pump cover is provided with a plurality of spaced-apart slots, and the other is provided with a plurality of spaced-apart fingers that can be inserted into the slots. By rotating the pump cover relative to the pump housing, the slots and the fingers can be engaged and disengaged.

[0024] In this way, the operator only needs to rotate the pump cover relative to the pump casing to install or remove the pump cover from the pump casing. This method makes the assembly and disassembly of the pump casing and pump cover much more convenient.

[0025] In some embodiments, the centrifugal pump further includes a drive unit for driving the impeller to rotate.

[0026] This application also relates to a mobile platform, which includes any of the centrifugal pumps described in the above embodiments. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0028] It should be understood that the following figures only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related figures can be obtained from these figures without creative effort.

[0029] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements (components or components).

[0030] It should be understood that the accompanying drawings are only schematic, and the dimensions and scale of the elements (components or parts) in the drawings are not necessarily precise.

[0031] Figure 1 This is a schematic diagram of the structure of a centrifugal pump according to an embodiment of this application.

[0032] Figure 2 for Figure 1 A schematic cross-sectional view of the centrifugal pump shown.

[0033] Figure 3 for Figure 1 The diagram shows a structural schematic of a portion of the components of a centrifugal pump.

[0034] Figure 4 for Figure 1 The diagram shows the structure of the impeller of the centrifugal pump.

[0035] Figure 5 for Figure 1 The diagram shows the structure of the pump cover of the centrifugal pump.

[0036] Figure 6 for Figure 1 An exploded view of a portion of the components of the centrifugal pump is shown. Detailed Implementation

[0037] The embodiments of the application are illustrated below with reference to the accompanying drawings. It should be understood that there are many ways to implement this application, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and complete understanding of this application.

[0038] Figure 1 This is a schematic diagram of the structure of a centrifugal pump 10 according to an embodiment of this application. Figure 2 This is a cross-sectional view of centrifugal pump 10. Figure 3 A schematic diagram of a component of the centrifugal pump 10.

[0039] See Figures 1 to 3 The centrifugal pump 10 is provided with an inlet 10a that allows fluid medium to flow in and an outlet 10b that allows fluid medium to flow out. The centrifugal pump 10 has a transition chamber 11a and a working chamber 11b inside. The centrifugal pump 10 includes an impeller 12. The impeller 12 is provided with one or more blades 121. The blades 121 are located in the working chamber 11b.

[0040] When the centrifugal pump 10 is running, the fluid medium flowing in from the inlet 10a first flows into the transition chamber 11a, then flows from the transition chamber 11a into the working chamber 11b and moves under the action of the blades 121, and finally is discharged from the outlet 10b. That is to say, the fluid medium flowing in from the inlet 10a of the centrifugal pump 10 passes through the transition chamber 11a and the working chamber 11b in sequence, and flows out from the outlet 10b of the centrifugal pump 10.

[0041] The fluid medium needs to flow into the transition chamber first and then into the working chamber where the blades are located. This means that the output flow rate of the centrifugal pump can be controlled by controlling the flow rate of the fluid medium flowing from the transition chamber into the working chamber. When a pressurized fluid medium flows in, the fluid medium can be output at a lower flow rate by reducing the flow rate of the fluid medium flowing from the transition chamber into the working chamber. Therefore, the centrifugal pump provided in this application embodiment can achieve a lower flow rate for the fluid medium even when the inflowing fluid medium is pressurized.

[0042] In some embodiments, see again Figures 1 to 3Between the transition cavity 11a and the working cavity 11b, a first partition wall 132 and a second partition wall 122 are sequentially provided starting from the transition cavity 11a. The first partition wall 132 and the second partition wall 122 separate the transition cavity 11a and the working cavity 11b.

[0043] In other words, the centrifugal pump 10 has a first partition wall 132 and a second partition wall 122 inside. The first partition wall 132 and the second partition wall 122 are located between the transition chamber 11a and the working chamber 11b, and the first partition wall 132 is closer to the transition chamber 11a than the second partition wall 122.

[0044] The first partition wall 132 has a first through hole 132a, and the second partition wall has a second through hole 122a. The first through hole 132a penetrates the first partition wall 132, and the second through hole 122a penetrates the second partition wall 122. The first partition wall 132 does not rotate with the impeller 12, while the second partition wall 122 rotates with the impeller 12.

[0045] When the centrifugal pump 10 is running, as the impeller 12 rotates, the first partition wall 132 and the second partition wall 122 rotate relative to each other, and the relative positions of the first through hole 132a and the second through hole 122a change continuously and periodically align.

[0046] When the first through hole 132a and the second through hole 122a are aligned, the fluid medium can flow from the transition cavity 11a into the working cavity 11b through the first through hole 132a and the second through hole 122a. When the first through hole 132a and the second through hole 122a are not aligned, the first partition wall 132 and the second partition wall 122 prevent the fluid medium from flowing from the transition cavity 11a into the working cavity 11b.

[0047] When the impeller 12 rotates at a higher speed, the first through hole 132a and the second through hole 122a align at a higher frequency, resulting in a larger flow of fluid medium from the transition chamber 11a into the working chamber 11b per unit time. When the impeller 12 rotates at a lower speed, the first through hole 132a and the second through hole 122a align at a lower frequency, resulting in a smaller flow of fluid medium from the transition chamber 11a into the working chamber 11b per unit time. Thus, the flow rate of the fluid medium from the transition chamber 11a into the working chamber 11b can be adjusted by controlling the rotational speed of the impeller 12.

[0048] In this way, the flow rate of the fluid medium from the transition chamber to the working chamber can be adjusted by controlling the impeller speed. Thus, when pressurized fluid medium flows into the centrifugal pump, the flow rate of the fluid medium from the transition chamber to the working chamber can be reduced by decreasing the impeller speed, thereby achieving a lower flow rate output of the fluid medium.

[0049] It should be understood that the first partition wall may have only one first through hole or multiple first through holes. The second partition wall may have only one second through hole or multiple second through holes. The number of first through holes and the number of second through holes may be the same or different.

[0050] As an example, the first partition wall can have multiple first through holes, and the second partition wall can have multiple second through holes; the number of first through holes and the number of second through holes can be the same. When the second partition wall rotates relative to the first partition wall to a certain position, the multiple first through holes can be simultaneously aligned with the multiple second through holes. In this way, the amount of fluid medium flowing from the transition cavity into the working cavity during each alignment can be increased.

[0051] It should be understood that the alignment of the first through hole and the second through hole does not require them to be absolutely aligned. As long as the fluid medium in the transition cavity can flow into the working cavity through the first through hole and the second through hole during alignment, it is sufficient.

[0052] It should be understood that, although in the above embodiments, the partition wall near the working chamber (i.e., the second partition wall) rotates with the impeller, while the partition wall near the transition chamber (i.e., the first partition wall) does not rotate with the impeller, in other embodiments, the partition wall near the working chamber may not rotate with the impeller, while the partition wall near the transition chamber may rotate with the impeller.

[0053] In some embodiments, see again Figures 1 to 3 The first partition wall 132 can be cylindrical, and the second partition wall 122 can also be cylindrical. The second partition wall 122 can be fitted onto the first partition wall 132, that is, the second partition wall 122 can surround the first partition wall 132.

[0054] Both the first and second partition walls are cylindrical, with the second partition wall fitted over the first partition wall. This allows a transition cavity to be formed on the inner circumference of the first partition wall and a working cavity to be formed on the outer circumference of the second partition wall. Furthermore, by making the first and second partition walls cylindrical, the first and second through holes on them can be periodically aligned when they rotate relative to each other.

[0055] It should be understood that although in the above embodiments the second partition wall is sleeved on the first partition wall, in other embodiments the first partition wall may be sleeved on the second partition wall.

[0056] It should be understood that although both the first partition wall and the second partition wall are cylindrical in the above embodiments, in other embodiments, the first partition wall and the second partition wall may not be cylindrical. For example, in some embodiments, the first partition wall and the second partition wall may both be disc-shaped and stacked between the transition cavity and the working cavity.

[0057] In some embodiments, see Figure 2 The outer peripheral surface 132b of the first partition wall 132 can contact the inner peripheral surface 122b of the second partition wall 122. The outer peripheral surface 132b of the first partition wall 132 can refer to the outer surface of the first partition wall 132, i.e., the surface facing the second partition wall 122. The inner peripheral surface 122b of the second partition wall 122 can refer to the inner surface of the second partition wall 122, i.e., the surface facing the first partition wall 132.

[0058] Since the outer peripheral surface of the first partition wall is in contact with the inner peripheral surface of the second partition wall, when the first through hole and the second through hole are not aligned, the cooperation between the first partition wall and the second partition wall can prevent or reduce the flow of fluid medium from the transition cavity into the working cavity through the gap between them.

[0059] It should be understood that the contact between the outer circumferential surface of the first partition wall and the inner circumferential surface of the second partition wall does not mean that the radial dimension of the outer circumferential surface of the first partition wall is strictly equal to the radial dimension of the inner circumferential surface of the second partition wall; a certain tolerance is allowed. For example, this tolerance can be from 0 mm to 2 mm.

[0060] Figure 4 This is a schematic diagram of the structure of an impeller 12 according to an embodiment of this application.

[0061] In some embodiments, see Figure 4 The second partition wall 122 can form part of the impeller 12. Alternatively, the second partition wall 122 can be part of the impeller 12. That is, the impeller 12 can include blades 121 and the second partition wall 122. As one implementation, the cylindrical second partition wall 122 can form the main body of the impeller 12, and the blades 121 can be formed on the outer circumferential surface of the second partition wall 122.

[0062] Integrating the second partition wall into the impeller ensures that the second partition wall rotates with the impeller, and eliminates the need for a separate component to form the second partition wall. This simplifies the structure of the centrifugal pump, promotes its lightweight design, reduces manufacturing costs, and makes it easier to assemble and disassemble.

[0063] It should be understood that although the second partition wall is part of the impeller in the above embodiments, in other embodiments, the second partition wall and the impeller can be two independent components. For example, in some embodiments, the second partition wall can be fixedly connected to the impeller by welding, gluing, or fasteners. Furthermore, in some embodiments, the impeller and the second partition wall can be separated from each other, and the second partition wall can be connected to the shaft driving the impeller, thereby rotating with the impeller.

[0064] In some embodiments, see again Figure 4The blade 121 can be disposed on the outer periphery of the cylindrical second partition wall 122. An imaginary straight line r extending radially along the second partition wall 122 and passing through the second through hole 122a intersects the blade 121.

[0065] It is understandable that the imaginary straight line extending radially along the second circumferential wall 122 can refer to a straight line that intersects and is perpendicular to the rotation center axis a of the second circumferential wall. That is, the imaginary straight line r intersects and is perpendicular to the rotation center axis a of the second circumferential wall 122, and the imaginary straight line r passes through the second through hole 122a.

[0066] Considering that when the second through-hole and the first through-hole are aligned, the fluid medium will flow radially into the working chamber along the second partition wall, the above implementation allows the fluid medium flowing out of the second through-hole to directly flow onto the blades, thus directly following the blade movement. If the fluid medium does not flow directly onto the blades but flows out of the impeller through the gap between adjacent impellers, it will not gain sufficient momentum, which will reduce the mechanical efficiency of the centrifugal pump. Therefore, the above implementation can improve the mechanical efficiency of the centrifugal pump.

[0067] In some embodiments, see Figure 2 The centrifugal pump 10 also includes a pump cover 13 and a pump housing 14. The pump cover 13 covers the pump housing 14, and the pump cover 13 and the pump housing 14 cooperate to define the internal spaces 11a, 11b of the centrifugal pump 10. A first partition wall 132 and a second partition wall 122 divide the internal spaces 11a, 11b into a transition chamber 11a and a working chamber 11b.

[0068] In some embodiments, the first partition wall 132 may be integrally formed with the pump cover 13. In some embodiments, the first partition wall 132 may be fixedly connected to the pump cover 13 by means such as welding, bonding, fastener connection, etc.

[0069] The inlet 10a of the centrifugal pump 10 may be formed on the pump cover 13. The first partition wall 132 may be located on the outer periphery of the inlet 10a, or in other words, the first partition wall 132 may surround the inlet 10a.

[0070] By integrally forming or fixing the first partition wall with the pump cover, it can be ensured that the first partition wall will not rotate with the second partition wall, and this implementation method is simple in structure and easy to disassemble and assemble. By placing the inlet on the pump cover and placing the first partition wall on the outer periphery of the inlet, the fluid medium flowing in from the inlet can flow directly into the transition chamber.

[0071] It should be understood that although in the above embodiments the first partition wall is integrally formed or fixedly connected with the pump cover, in other embodiments the two may be separate from each other.

[0072] In some embodiments, see Figure 2The first through hole 132a can be located at the end of the first partition wall 132 away from the pump cover 13.

[0073] Considering that the centrifugal pump is usually placed with the pump cover facing upwards during use, placing the first through hole at the end of the first partition wall furthest from the pump cover ensures that the first through hole is located at the bottom of the transition chamber during use. This facilitates the drainage of the fluid medium from the transition chamber and prevents fluid medium from accumulating in the transition chamber when not in use. Long-term accumulation of fluid medium in the transition chamber can damage the centrifugal pump and reduce its service life.

[0074] It should be understood that although in the above embodiment the first through hole is located at the end of the first partition wall away from the pump cover, in other embodiments the first through hole may also be located at other positions on the first partition wall, for example, the first through hole may be located in the middle of the first partition wall.

[0075] Figure 5 This is a schematic diagram of the structure of a pump cover 13 according to an embodiment of this application. Figure 6 An exploded view of some components of the centrifugal pump 10.

[0076] In some embodiments, see Figure 5 and Figure 6 The pump cover 13 has a plurality of spaced-apart slots 131 on its outer periphery, and the pump housing 14 has a plurality of spaced-apart fingers 141 on its outer periphery that can be inserted into the slots 131. The plurality of slots 131 and the plurality of fingers 141 are configured such that by rotating the pump cover 13 relative to the pump housing 14, the plurality of slots 131 and the plurality of fingers 141 can be engaged (i.e., the fingers 141 are inserted into the slots 131) and disengaged (i.e., the fingers 141 are pulled out of the slots 131).

[0077] In this way, the operator only needs to rotate the pump cover relative to the pump casing to install or remove the pump cover from the pump casing. This method makes the assembly and disassembly of the pump casing and pump cover much more convenient.

[0078] In some embodiments, see Figure 1 and Figure 2 The centrifugal pump 10 may also include a drive unit 16. The drive unit can be used to drive the impeller 12 to rotate.

[0079] It should be understood that there are various ways to implement the drive device, and the embodiments of this application do not specifically limit the type of drive device. For example, in some embodiments, the drive device can be an electric motor. As another example, in some embodiments, the drive device can also be a hydraulic motor.

[0080] The application also provides a mobile platform, which includes the centrifugal pump provided in the application.

[0081] It should be understood that there are many types of mobile platforms, and this application does not specifically limit the type of mobile platform. For example, in some embodiments, the driving device may be a drone (i.e., an unmanned aerial vehicle). In other embodiments, the driving device may also be an unmanned vehicle. Furthermore, in some embodiments, the mobile platform may also be an autonomous robot.

[0082] In some embodiments, the mobile platform provided in this application may include a spraying system, which may include the centrifugal pump described in the above embodiments. As an example, the spraying system may be used to spray pesticides.

[0083] In typical spraying systems, the container holding the fluid medium is placed above the centrifugal pump so that gravity fills the pump with the fluid medium. This results in the fluid medium at the pump inlet being pressurized under gravity. In applications requiring spraying fluid media at lower flow rates, conventional centrifugal pumps cannot achieve this. The centrifugal pump provided in this application solves this problem.

[0084] It should be understood that the term "comprising" and its variations as used in this application are open-ended, meaning "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".

[0085] It should be understood that although terms such as “first” or “second” may be used in this application to describe various elements (e.g., the first partition wall and the second partition wall), these elements are not limited by these terms, which are only used to distinguish one element from another.

[0086] It should be noted that the various specific technical features (elements) described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0087] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A centrifugal pump, characterized in that, The centrifugal pump has a transition chamber and a working chamber. The fluid medium flowing in from the inlet of the centrifugal pump passes through the transition chamber and the working chamber in sequence and flows out from the outlet of the centrifugal pump. The centrifugal pump includes an impeller with blades, and the blades are disposed in the working chamber. Between the transition cavity and the working cavity, a first partition wall and a second partition wall are sequentially provided starting from the transition cavity. The first partition wall and the second partition wall separate the transition cavity and the working cavity. The first partition wall is provided with a first through hole, and the second partition wall is provided with a second through hole. The first partition wall does not rotate with the impeller, while the second partition wall rotates with the impeller. The first through hole and the second through hole are periodically aligned as the impeller rotates. Both the first partition wall and the second partition wall are cylindrical, and the second partition wall is sleeved on the first partition wall, thereby forming the transition cavity on the inner circumferential side of the first partition wall and the working cavity on the outer circumferential side of the second partition wall; When the pressurized fluid medium flows into the centrifugal pump, the flow rate of the fluid medium flowing from the transition chamber into the working chamber is reduced by decreasing the rotational speed of the impeller.

2. The centrifugal pump according to claim 1, characterized in that, The blade is located on the outer periphery of the second partition wall, and an imaginary straight line extending radially along the second partition wall and passing through the second through hole intersects the blade.

3. The centrifugal pump according to claim 1, characterized in that, The second partition wall forms part of the impeller, or the second partition wall is fixedly connected to the impeller.

4. The centrifugal pump according to claim 1, characterized in that, The outer peripheral surface of the first partition wall is in contact with the inner peripheral surface of the second partition wall.

5. The centrifugal pump according to claim 1, characterized in that, The centrifugal pump also includes a pump casing and a pump cover. The pump cover is disposed on the pump casing and cooperates with the pump casing to define an internal space. The first partition wall and the second partition wall divide the internal space into the transition chamber and the working chamber. The first partition wall is fixedly connected to or integrally formed with the pump cover. The inlet of the centrifugal pump is formed on the pump cover, and the outlet of the centrifugal pump is formed on the pump casing. The first partition wall surrounds the inlet of the centrifugal pump.

6. The centrifugal pump according to claim 5, characterized in that, The first through hole is located at the end of the first partition wall away from the pump cover.

7. The centrifugal pump according to claim 5, characterized in that, One of the pump housing and the pump cover is provided with a plurality of spaced-apart slots, and the other is provided with a plurality of spaced-apart fingers that can be inserted into the slots. By rotating the pump cover relative to the pump housing, the slots and fingers can be engaged and disengaged.

8. The centrifugal pump according to any one of claims 1 to 7, characterized in that, The centrifugal pump also includes a drive unit for driving the impeller to rotate.

9. A mobile platform, characterized in that, The mobile platform includes a centrifugal pump as described in any one of claims 1 to 8.

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