Electric fluid pump

Abstract

Disclosed in the present invention is an electric fluid pump, comprising an electric motor, a fluid displacement member and a transmission assembly, wherein the electric motor comprises a rotor, which is capable of performing rotational motion about a rotational axis thereof; the fluid displacement member can be driven to perform reciprocating motion for pumping a fluid; and the transmission assembly is connected to both the rotor and the fluid displacement member, and the transmission assembly can convert the rotational motion of the rotor into a linear reciprocating motion of the fluid displacement member. The transmission assembly comprises a lead-screw component and a sliding member, wherein the lead-screw component is connected to the rotor, a guide groove is formed on an outer periphery of the lead-screw component, the sliding member is connected to the fluid displacement member, and the sliding member is movably arranged in the guide groove; and the rotor and the lead-screw component are formed as an integral piece, or the rotor and the lead-screw component are the same component. The solution can simplify the structure of the electric fluid pump and can reduce the number of parts, thereby making the overall structure of the electric fluid pump more compact.

Description

electric fluid pump Technical Field

[0001] This invention relates to the field of fluid pumping, and more particularly to an electric fluid pump. Background Technology

[0002] Fluid transfer devices, such as electric diaphragm pumps, are crucial equipment in the production and manufacturing of chemicals, pharmaceuticals, coal mines, and semiconductors. Existing electric diaphragm pumps mainly consist of a motor, reducer, crank mechanism, and diaphragm. During operation, the motor generates rotational motion, which is reduced to a predetermined speed by the reducer. Then, the crank or cam mechanism converts the rotational motion into linear reciprocating motion, driving the diaphragm in the pump body to reciprocate, thus creating suction and discharge. This type of pump has a complex design, low efficiency, large and bulky size, and high cost, making it difficult to install, transport, and maintain.

[0003] Therefore, there is a need to provide an electric fluid pump to at least partially solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an electric fluid pump that simplifies the structure of the electric fluid pump, reduces the number of parts, and thus makes the overall structure of the electric fluid pump more compact.

[0005] The electro-fluid pump provided in this application includes:

[0006] An electric motor, the electric motor including a rotor, the rotor being configured to rotate about its axis of rotation;

[0007] A fluid displacement member configured to be driven to reciprocate for pumping fluid; and

[0008] A transmission assembly, respectively connected to the rotor and the fluid displacement member, is configured to convert the rotational motion of the rotor into linear reciprocating motion of the fluid displacement member, the transmission assembly comprising:

[0009] A lead screw assembly connected to the rotor, wherein a guide groove is formed on the outer periphery of the lead screw assembly; and

[0010] A slider, connected to the fluid displacement member, is movably disposed within the guide groove.

[0011] The rotor and the lead screw are formed as a single unit, or the rotor and the lead screw are the same component.

[0012] Preferably, the lead screw component is arranged coaxially with the rotor.

[0013] Preferably, the transmission assembly is configured to convert the unidirectional rotational motion of the rotor into the linear reciprocating motion of the fluid displacement member.

[0014] Preferably, the guide groove is arranged such that when the lead screw component and the rotor perform the unidirectional rotational motion, the sliding member can perform linear reciprocating motion along the axial direction of the lead screw component.

[0015] Preferably, the guide groove extends in both the circumferential and axial directions of the lead screw component, the guide groove being continuous and closed-loop in the circumferential direction, and having a predetermined extension length in the axial direction.

[0016] Preferably, the guide groove includes a first guide groove and a second guide groove arranged symmetrically with respect to the axial center plane of the lead screw component and the first guide groove, wherein the first end and the second end of the first guide groove are respectively connected to the first end and the second end of the second guide groove.

[0017] Preferably, the distance between the first end of the first guide groove and the second end of the first guide groove in the axial direction is equal to the predetermined extension length, and the distance between the first end of the second guide groove and the second end of the second guide groove in the axial direction is equal to the predetermined extension length.

[0018] Preferably, the guide groove is configured such that when the lead screw component performs the unidirectional rotational motion: when the slider moves in the first guide groove, it performs linear motion in a first direction, and when the slider moves in the second guide groove, it performs linear motion in a second direction opposite to the first direction.

[0019] Preferably, the first guide groove and the second guide groove each include a bent section, such that when the lead screw component performs the unidirectional rotational motion: when the slider moves in the first guide groove, it performs linear reciprocating motion in a first direction and a second direction opposite to the first direction, and when the slider moves in the second guide groove, it performs linear reciprocating motion in the first direction and the second direction.

[0020] Preferably, the slider includes a ball slidably disposed in the guide groove.

[0021] Preferably, the transmission assembly includes a nut component, the nut component including a connecting device fixedly connected to the fluid displacement member, the connecting device including a first connecting portion and a second connecting portion connected to the first connecting portion, the first connecting portion being sleeve-shaped and sleeved on the end of the lead screw component, the first connecting portion being configured to move along the axial direction of the lead screw component on the lead screw component, the outer wall of the first connecting portion having a first hole and the end having a second hole, the fluid displacement member having a third hole, a portion of the sliding member being embedded in the first hole, the second connecting portion being column-shaped, and both ends being respectively installed to the second hole and the third hole.

[0022] Preferably, the fluid displacement component includes a diaphragm.

[0023] Preferably, the central axis of the diaphragm coincides with the rotation axis of the rotor.

[0024] Preferably, the motor is a permanent magnet synchronous direct drive motor.

[0025] Preferably, the electric fluid pump includes two pumping devices, each of which includes a fluid displacement component and a set of transmission components, and the two pumping devices are respectively disposed at both ends of the rotor along the axial direction of the rotor.

[0026] Preferably, two sets of transmission components are respectively connected to both ends of the rotor, and two fluid displacement components are respectively connected to both ends of the two sets of transmission components.

[0027] Preferably, the rotor is configured to:

[0028] The two nut components are driven to move linearly in a first direction to drive one of the two fluid displacement components to perform a suction stroke and simultaneously drive the other of the two fluid displacement components to perform a pumping stroke.

[0029] The two nut components are driven to move linearly in a second direction opposite to the first direction, so as to drive one of the two fluid displacement components to perform a pumping stroke and synchronously drive the other of the two fluid displacement components to perform a suction stroke.

[0030] According to the embodiments of this application, the electric fluid pump integrates the lead screw component of the transmission assembly with the rotor of the motor, eliminating the need for a speed reducer. This reduces the number of components in the electric fluid pump, lowers its energy consumption, and consequently reduces its cost, size, and weight. Furthermore, by replacing the original crank and cam structure with a lead screw component and a nut component movable relative to the lead screw component, the cost, size, and weight of the electric fluid pump can be further reduced, thereby expanding its application areas. Attached Figure Description

[0031] To better understand the above and other objects, features, advantages, and functions of this application, reference can be made to the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of this application and are not intended to limit the scope of this application.

[0032] Figure 1 is a perspective view of an electric fluid pump according to a preferred embodiment of the present invention;

[0033] Figure 2 is a side view of the electric fluid pump shown in Figure 1;

[0034] Figure 3 is a schematic diagram of the cross-section of the electric fluid pump shown in Figure 2 along line AA;

[0035] Figure 4 is a three-dimensional schematic diagram of a portion of the motor and transmission assembly of the electric fluid pump shown in Figure 1.

[0036] Figure 5 is a side view of the electric fluid pump shown in Figure 4;

[0037] Figure 6 is a schematic diagram of the cross-section of the electric fluid pump shown in Figure 5 along line BB;

[0038] Figure 7 is a top view of the electric fluid pump shown in Figure 4;

[0039] Figure 8 is a front view of the electric fluid pump shown in Figure 4. Detailed Implementation

[0040] Now, with reference to the accompanying drawings, specific embodiments of this application will be described in detail. The embodiments described herein are merely preferred embodiments based on this application; those skilled in the art can conceive of other ways to implement this application based on the preferred embodiments, and such other ways also fall within the scope of this application.

[0041] First, it should be noted that the directional and positional terms used in this application should be understood as relative directions and positions, rather than absolute directions and positions.

[0042] This application discloses an electric fluid pump 100 and a method for pumping fluid using the electric fluid pump 100. As shown in Figures 1-3, the electric fluid pump 100 includes a housing 140 and a motor 110 and a pumping device disposed within the housing 140. An outlet manifold 140a and an inlet manifold 140b are respectively disposed above and below the housing 140. A fluid chamber 150 is also disposed on the side of the housing 140, which can communicate with the inlet manifold 140b and the outlet manifold 140a respectively. The fluid chamber 150 is a closed chamber, which is at least partially defined by a fluid cover 151 and a fluid displacement member 120 (described below).

[0043] As shown in Figure 3, the motor 110 is constructed as a motor, including a stator 112 and a rotor 111. The rotor 111 is capable of rotating about a rotation axis XX, which coincides with the axial center line of the rotor 111. In a preferred embodiment according to this application, the motor 110 is constructed as a permanent magnet synchronous direct drive motor (hereinafter referred to as "motor"). Permanent magnet synchronous direct drive motors have high efficiency, can directly drive loads without a reduction gear, and are small in size, low in noise, and more reliable in operation.

[0044] The pumping device includes a drive assembly 130 and a fluid displacement member 120. The drive assembly 130 is connected to the rotor 111 and the fluid displacement member 120, such that the motion of the rotor 111 can be transmitted to the fluid displacement member 120 via the drive assembly 130. The drive assembly 130 converts the unidirectional rotational motion of the rotor 111 into the linear reciprocating motion of the fluid displacement member 120. That is, when the rotor 111 rotates in a single direction, either clockwise or counterclockwise, the fluid displacement member 120 is driven by the drive assembly 130 to perform linear reciprocating motion, cyclically performing suction and pumping strokes, thereby achieving fluid suction and pumping. During the suction stroke, the fluid displacement member 120 draws fluid from the lower inlet manifold 140b into the fluid chamber 150. During the pumping stroke, the fluid displacement member 120 drives fluid from the fluid chamber 150 to the upper outlet manifold 140a. Compared with the traditional method where the rotor needs to rotate in both clockwise and counterclockwise directions to achieve linear reciprocating motion of the component, the method in this application where the rotor 111 only needs to rotate in one direction to achieve linear reciprocating motion of the fluid displacement component 120 can significantly reduce the energy consumption of the electric fluid pump and improve the operating efficiency, because there is no need to stop the rotor midway and switch to the other opposite direction of rotation.

[0045] The fluid displacement member 120 can take the form of any device suitable for fluid pumping. In the illustrated embodiment, the fluid displacement member 120 is a diaphragm, which can be made of a flexible material such as rubber. The electric fluid pump 100 will be described below with the fluid displacement member 120 as a diaphragm as an example. It will be understood that in other embodiments, the fluid displacement member 120 can also be other suitable devices such as a piston.

[0046] The rotor 111 of the motor is directly connected to the transmission assembly 130, and the diaphragm is also directly connected to the transmission assembly 130. No intermediate gear components (e.g., reducers) are placed between the rotor 111 and the transmission assembly 130, or between the diaphragm and the transmission assembly 130. This design significantly reduces the overall size and weight of the electric fluid pump 100, lowers the noise level during operation, and reduces costs.

[0047] In a preferred embodiment, as shown in Figures 3-8, the transmission assembly 130 includes a lead screw component 131 and a nut component 132 connected to the lead screw component 131. The lead screw component 131 is generally rod-shaped, and one end is fixedly connected to the rotor 111 so that the lead screw component 131 can be driven by the rotor 111 to rotate synchronously with the rotor 111. A guide groove 131a is formed on the outer periphery of the lead screw component 131. The lead screw component 131 and the rotor 111 can be independent components, but they can be integrally connected together by welding or other means, or the lead screw component 131 can be the same single component as the rotor 111.

[0048] More preferably, the lead screw component 131 is arranged coaxially with the rotor 111, that is, the axial center of the lead screw component 131 coincides with the axial center of the rotor 111. Furthermore, preferably, the central axis of the diaphragm coincides with the axial centerline (i.e., the rotation axis XX) of the rotor 111, thereby ensuring that the rotor 111, lead screw component 131, and diaphragm are arranged coaxially. This design can further reduce the overall volume of the electric fluid pump 100, making the overall structure of the electric fluid pump 100 more compact.

[0049] The nut component 132 includes a connecting device 133 and a sliding member 132a connected to the connecting device 133. The sliding member 132a is movably disposed in the guide groove 131a, and the connecting device 133 is fixedly connected to the diaphragm. The guide groove 131a is arranged such that when the lead screw component 131 is driven to perform unidirectional rotational motion, the sliding member 132a can perform linear reciprocating motion along the axial direction of the lead screw component 131. The structure of the guide groove 131a will be described in detail below.

[0050] As shown in Figures 3 and 6, in a preferred embodiment, the connecting device 133 includes a first connecting portion 134, which is sleeve-shaped and fitted onto the end of the lead screw component 131. The outer wall of the first connecting portion 134 has a first hole 136. A portion of the sliding member 132a is disposed in the guide groove 131a, and another portion is embedded in the first hole 136, allowing the first connecting portion 134 to move synchronously with the sliding member 132a along the axial direction of the lead screw component 131. The sliding member 132a can be configured, for example, as a ball or roller slidably disposed in the guide groove 131a. To prevent the sliding member 132a from shifting in the first hole 136, preferably, as shown in Figures 3-6, a fastening member 136a is also provided in the first hole 136. This fastening member 136a abuts against the sliding member 132a radially outward, thereby increasing the stability of the sliding member 132a in the first hole 136.

[0051] The connecting device 133 further includes a second connecting portion 135, which is generally columnar and connected at both ends to the first connecting portion 134 and the diaphragm, respectively. As shown in Figures 3 and 6, the end of the first connecting portion 134 is provided with a second hole 137, and the diaphragm is provided with a third hole 138. The second connecting portion 135 is fixedly connected to the second hole 137 and the third hole 138, thereby enabling both the second connecting portion 135 and the diaphragm to move together with the first connecting portion 134 in the axial direction of the lead screw component 131.

[0052] The structure of the guide groove 131a on the lead screw component 131 will be described in detail below.

[0053] As shown in Figures 7 and 8, the guide groove 131a extends in both the circumferential and axial directions of the lead screw component 131, and has a predetermined extension length in the axial direction. The guide groove 131a is continuous and arranged in a closed loop in the circumferential direction, that is, the groove shape of the guide groove 131a is complete, cyclic and continuous in the circumferential direction.

[0054] As shown in Figure 7, the guide groove 131a is composed of a first guide groove 131b and a second guide groove 131c. The first guide groove 131b and the second guide groove 131c are arranged symmetrically with respect to the axial center plane of the lead screw component 131. The first end and the second end of the first guide groove 131b are respectively connected to and communicate with the first end and the second end of the second guide groove 131c. The first guide groove 131b and the second guide groove 131c together constitute a guide groove 131a that is continuous and arranged in a closed loop in the circumferential direction.

[0055] In a preferred embodiment, the distance between the first end and the second end of the first guide groove 131b in the axial direction of the lead screw component 131 is equal to the predetermined extension length of the guide groove 131a, and the distance between the first end and the second end of the second guide groove 131c in the axial direction is equal to the predetermined extension length of the guide groove 131a.

[0056] In the preferred embodiment illustrated, both the first guide groove 131b and the second guide groove 131c extend smoothly from their respective first ends to their second ends along the axial direction. This allows the slider 132a to move linearly in a first direction when the lead screw component 131 is driven to rotate unidirectionally, and to move linearly in a second direction opposite to the first direction when it moves in the first guide groove 131b, and in a second direction opposite to the first direction when it moves in the second guide groove 131c. Thus, when the lead screw component 131 is driven to rotate one revolution, the slider 132a drives the diaphragm through the connecting device 133 to complete a full stroke including one suction stroke and one pumping stroke. The terms "first direction" and "second direction" as used herein refer to directions parallel to the axial direction of the lead screw component 131.

[0057] While ensuring that the guide groove 131a is continuous and closed-loop in the circumferential direction, those skilled in the art can adjust the configuration of the guide groove 131a according to actual needs. For example, the first guide groove 131b and the second guide groove 131c can each include bent sections, so that when the slider 132a moves in the first guide groove 131b, it can perform reciprocating linear motion in the first and second directions, and when the slider 132a moves in the second guide groove 131c, it can perform reciprocating linear motion in the first and second directions. Thus, when the lead screw component 131 is driven to rotate one revolution, the slider 132a drives the diaphragm to perform two complete strokes, including two suction strokes and two pumping strokes, via the connecting device 133. It is understood that those skilled in the art can select the number of bent sections according to actual needs to achieve the desired number of strokes when the lead screw component 131 is rotated one revolution.

[0058] Preferably, as shown in FIG3, the electric fluid pump 100 includes two pumping devices and two fluid chambers 150 corresponding to the two pumping devices. The two pumping devices are respectively disposed at both ends of the rotor 111 along the axial direction of the rotor 111, and the two fluid chambers 150 are respectively located on both sides of the housing 140. Each pumping device includes a diaphragm and a set of transmission assemblies 130. The two sets of transmission assemblies 130 are respectively connected to both ends of the rotor 111, and the two diaphragms are respectively connected to both ends of the two sets of transmission assemblies 130.

[0059] Preferably, as shown in FIG7, the guide grooves 131a on the lead screw components 131 of the two sets of transmission assemblies 130 are arranged and oriented in the same way, such that when the rotor 111 is driven to perform unidirectional rotational motion, the lead screw components 131 at both ends of the rotor 111 rotate in the same direction as the rotor 111, and the nut components 132 located at the ends of each lead screw component 131 are driven to perform linear motion in the same direction as each other. During operation, when the rotor 111 is driven to perform one unidirectional rotation, the two nut components 132 move linearly in the first direction and then linearly in the second direction. When the two nut components 132 move linearly in the first direction, one of the two diaphragms is driven to perform a suction stroke to draw fluid from the inlet manifold 140b into the fluid chamber 150, while the other of the two diaphragms is driven to perform a pumping stroke to drive fluid from the fluid chamber 150 to the outlet manifold 140a. When the two nut components 132 move linearly in the second direction, one of the two diaphragms is driven in a pumping stroke to drive fluid from the fluid chamber 150 to the outlet manifold 140a, while the other diaphragm is driven in a suction stroke to draw fluid from the inlet manifold 140b into the fluid chamber 150. This design allows the volumes of the fluid chambers 150 at both ends to change alternately, enabling the electric fluid pump 100 to continuously draw in and discharge liquid.

[0060] The present invention also provides a method for pumping fluid using the electric fluid pump 100 as described above, the method comprising:

[0061] Drive rotor 111 to rotate in one direction;

[0062] In response to the unidirectional rotation of the rotor 111, the transmission assembly 130 drives the diaphragm to perform linear reciprocating motion for the pumping and suction strokes.

[0063] In actual operation, the rotor 111 can be driven to rotate in one direction by starting the motor. When the rotor 111 rotates in one direction, the lead screw component 131 of the transmission assembly 130 is driven to rotate synchronously in one direction. At the same time, the nut component 132 drives the diaphragm to perform linear reciprocating motion along the axial direction of the lead screw component 131, thereby pumping and extracting fluid.

[0064] The specific structure and working process of the electric fluid pump 100 have been described in detail above, and will not be repeated here for the sake of brevity.

[0065] The method for fluid pumping using the electric fluid pump according to this application can achieve stable, reliable, efficient and high-precision fluid pumping without the need for additional components such as controllers or sensors, thereby improving the reliability of the electric fluid pump. Furthermore, this solution can also extend the lifespan of the electric fluid pump and save costs.

[0066] The above description of various embodiments of this application is provided for descriptive purposes to a person of ordinary skill in the art. It is not intended to exclude or limit this application to a single disclosed embodiment. As taught above, a person of ordinary skill in the art will understand that various alternatives and variations of this application are possible. Therefore, although some alternative embodiments have been specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. This application is intended to include all alternatives, modifications, and variations of this application described herein, as well as other embodiments falling within the spirit and scope of the application described above.

Claims

1. An electric fluid pump (100), characterized in that, The electric fluid pump (100) includes: An electric motor (110) includes a rotor (111) configured to rotate about its axis of rotation; A fluid displacement member (120) configured to be driven to reciprocate for pumping fluid; and A transmission assembly (130) is connected to the rotor (111) and the fluid displacement member (120) respectively. The transmission assembly (130) is configured to convert the rotational motion of the rotor (111) into the linear reciprocating motion of the fluid displacement member (120). The transmission assembly includes: A lead screw assembly (131) connected to the rotor (111), wherein a guide groove (131a) is formed on the outer periphery of the lead screw assembly (131); and A slider (132a) is connected to the fluid displacement member (120), and the slider (132a) is movably disposed in the guide groove (131a). The rotor (111) and the lead screw component (131) are formed as a single unit, or the rotor (111) and the lead screw component (131) are the same component.

2. The electrohydrodynamic pump (100) according to claim 1, characterized in that The lead screw component (131) is arranged coaxially with the rotor (111).

3. The electrohydrodynamic pump (100) of claim 1, wherein, The transmission assembly (130) is configured to convert the unidirectional rotational motion of the rotor (111) into the linear reciprocating motion of the fluid displacement member (120).

4. The electro-hydraulic pump (100) according to claim 3, characterized in that The guide groove (131a) is arranged such that when the lead screw component (131) and the rotor perform the unidirectional rotational motion, the sliding member (132a) can perform linear reciprocating motion along the axial direction of the lead screw component.

5. The electro-hydraulic pump (100) according to claim 4, characterized in that The guide groove (131a) extends in the circumferential and axial directions of the lead screw component (131). The guide groove (131a) is continuous and closed-loop in the circumferential direction and has a predetermined extension length in the axial direction.

6. The electrohydrodynamic pump (100) according to claim 5, characterized in that The guide groove (131a) includes a first guide groove (131b) and a second guide groove (131c) symmetrically arranged with respect to the axial center plane of the lead screw component (131) and the first guide groove (131b). The first end and the second end of the first guide groove (131b) are respectively connected to the first end and the second end of the second guide groove (131c).

7. The electrohydrodynamic pump (100) according to claim 6, characterized in that The distance between the first end of the first guide groove (131b) and the second end of the first guide groove (131b) in the axial direction is equal to the predetermined extension length, and the distance between the first end of the second guide groove (131c) and the second end of the second guide groove (131c) in the axial direction is equal to the predetermined extension length.

8. The electrohydrodynamic pump (100) of claim 6, wherein, The guide groove (131a) is configured such that when the lead screw component (131) performs the unidirectional rotational motion, the slider (132a) performs linear motion in a first direction when it moves in the first guide groove (131b), and performs linear motion in a second direction opposite to the first direction when it moves in the second guide groove (131c).

9. The electrohydrodynamic pump (100) of claim 6, wherein, The first guide groove (131b) and the second guide groove (131c) each include a bent section, such that when the lead screw component (131) performs the unidirectional rotational motion: when the slider (132a) moves in the first guide groove (131b), it performs linear reciprocating motion in a first direction and a second direction opposite to the first direction, and when the slider (132a) moves in the second guide groove (131c), it performs linear reciprocating motion in the first direction and the second direction.

10. The electrohydrodynamic pump (100) of claim 1, wherein, The slider (132a) includes a ball slidably disposed in the guide groove (131a).

11. The electrohydrodynamic pump (100) of claim 4, wherein, The transmission assembly includes a nut component (132), which includes a connecting device (133) fixedly connected to the fluid displacement member (120). The connecting device (133) includes a first connecting portion (134) and a second connecting portion (135) connected to the first connecting portion (134). The first connecting portion (134) is sleeve-shaped and sleeved on the end of the lead screw component (131). The first connecting portion (134) is configured to move along the axial direction of the lead screw component on the lead screw component (131). The outer wall of the first connecting portion (134) has a first hole (136) and a second hole (137) is provided at the end. The fluid displacement member (120) is provided with a third hole (138). A portion of the sliding member (132a) is embedded in the first hole (136). The second connecting portion (135) is columnar and its two ends are respectively installed to the second hole (137) and the third hole (138).

12. The electrohydrodynamic pump (100) of claim 1, wherein, The fluid displacement member (120) includes a diaphragm.

13. The electrohydrodynamic pump (100) according to claim 12, characterized in that The central axis of the diaphragm coincides with the rotation axis of the rotor (111).

14. The electrohydrodynamic pump (100) according to any one of claims 1 to 13, characterized in that The motor (110) is a permanent magnet synchronous direct drive motor.

15. The electrohydrodynamic pump (100) of claim 11, wherein, The electric fluid pump (100) includes two pumping devices, each of which includes a fluid displacement member (120) and a set of transmission components (130). The two pumping devices are respectively disposed at both ends of the rotor (111) along the axial direction of the rotor (111).

16. The electrohydrodynamic pump (100) according to claim 15, characterized in that Two sets of transmission components (130) are respectively connected to the two ends of the rotor (111), and two fluid displacement components (120) are respectively connected to the two ends of the two sets of transmission components (130).

17. The electrohydrodynamic pump (100) according to claim 16, characterized in that The rotor (111) is configured to be able to: The two nut components (132) are driven to move linearly in a first direction to drive one of the two fluid displacement components (120) to perform a suction stroke and simultaneously drive the other of the two fluid displacement components (120) to perform a pumping stroke. The two nut components (132) are driven to move linearly in a second direction opposite to the first direction to drive one of the two fluid displacement components (120) to perform a pumping stroke and synchronously drive the other of the two fluid displacement components (120) to perform a suction stroke.

Images