Fluid pumping device

Abstract

The application relates to a fluid pumping device, comprising a pump body mechanism and a connecting mechanism, the pump body mechanism comprising a pump body assembly and a power assembly, and the connecting mechanism comprising a spring washer, an elastic sealing ring and a sealing cavity. The power assembly is arranged in a fluid pumping cavity of the pump body assembly, and drives the power assembly to run in the fluid pumping cavity to realize fluid pumping. The pump body assembly is arranged in the sealing cavity to protect the pump body assembly, the spring washer is arranged between a bottom wall of the sealing cavity and the pump body assembly, and the elastic sealing ring is arranged between the pump body assembly and a side wall of the sealing cavity. The spring washer can absorb axial movement of the pump body assembly during operation, absorb fluid pressure pulsation, reduce noise and vibration, and reduce the wear degree of various parts. The elastic sealing ring can reduce the possibility of fluid leakage in the fluid pumping cavity, improve the sealing performance during fluid pumping, so as to meet the requirements of industrial automation and precise control on the performance and high reliability of the fluid pumping device.

Description

Technical Field

[0001] This application relates to the field of pump structure technology, and in particular to fluid pumping devices. Background Technology

[0002] A gear pump is a rotary pump that transports or pressurizes liquids by changing and moving the working volume formed between the pump cylinder and the meshing gears. With its compact structure, high efficiency, and easy maintenance, it has been widely used in the field of fluid transportation.

[0003] With the continuous advancement of industrial automation and the increasing demand for precision control, the market has placed higher requirements on the performance of motor-driven gear pumps. For example, patent CN118462576A discloses a special gear pump that can be used in deep sea. The stator is set in the first sealing cavity, which is sealed by the first radial sealing ring and the second radial sealing ring. The motor mechanism and the pump head mechanism are connected by a connecting plate, making the motor mechanism and the pump head mechanism relatively independent, simple to assemble, and convenient to disassemble and maintain.

[0004] However, this existing technology only focuses on the sealing of the motor section, neglecting the operational stability and sealing of the gear pump body. In actual industrial applications, gear pumps often generate significant noise and vibration during operation due to factors such as gear meshing and fluid pressure pulsation. This not only adversely affects the surrounding working environment but also leads to accelerated wear of components, thereby affecting the stability and service life of the gear pump and making it difficult to meet the current market demand for high precision and high reliability in motor-gear pumps. Utility Model Content

[0005] Therefore, it is necessary to provide a fluid pumping device that can improve the sealing effect in order to address the above problems.

[0006] A fluid pumping device includes a pump body mechanism and a connecting mechanism. The pump body mechanism includes a pump body assembly and a power assembly. A fluid pumping chamber is formed within the pump body assembly, and the power assembly is disposed within the fluid pumping chamber. The connecting mechanism includes a spring washer, an elastic sealing ring, and a sealing shell. A sealing cavity is formed within the sealing shell, and the pump body assembly is disposed within the sealing cavity. The spring washer is disposed between the bottom wall of the sealing cavity and the pump body assembly, and the spring force direction of the spring washer is from the pump body assembly to the bottom wall of the sealing cavity. The elastic sealing ring is disposed between the pump body assembly and the side wall of the sealing cavity.

[0007] In one embodiment, the pump assembly includes a pump end cover, a pump body, and a pump bottom cover. The pump body has a fluid pumping chamber formed therein. The pump end cover and the pump bottom cover are located on opposite sides of the pump body. The spring washer is located between the pump bottom cover and the sealing shell. The elastic sealing ring is located between the pump end cover and the inner wall of the sealing shell. The outer walls of the pump end cover, the pump body, and the pump bottom cover are all in contact with the inner wall of the sealing chamber.

[0008] In one embodiment, the bottom cover of the pump body has a positioning groove on the side opposite to the pump body, and the spring washer is disposed in the positioning groove and abuts against the bottom wall of the sealing shell.

[0009] In one embodiment, the spring washer is a two-turn spring.

[0010] In one embodiment, the sealing shell has an opening on one side, and the opening of the sealing shell is bent to form an abutment portion. The pump body end cover includes a cover portion and a connecting portion. The cover portion is disposed in the sealing cavity and abuts against the pump body. The connecting portion is formed on the side of the cover portion facing away from the pump body, and the radial dimension of the connecting portion is greater than the radial dimension of the cover portion, so that the connecting portion can abut against the abutment portion. The elastic sealing ring is located between the abutment portion and the connecting portion.

[0011] In one embodiment, the connecting portion has a sealing groove on the side facing the cover portion, the elastic sealing ring is located in the sealing groove, and the size of the abutting portion is the same as the size of the sealing groove, so that the abutting portion is located at the sealing groove and abuts against the elastic sealing ring.

[0012] In one embodiment, the connecting mechanism further includes a connecting plate located on the side of the connecting portion facing the sealing shell, and the connecting plate is capable of pressing the abutment portion into the sealing groove. The fluid pumping device further includes a first fastener, one end of which passes through the connecting plate and the connecting portion in sequence, so that the connecting portion, the connecting plate and the sealing shell are interconnected.

[0013] In one embodiment, the fluid pumping device further includes a drive mechanism and a protective shell. A protective cavity is formed inside the protective shell, and both the sealing shell and the drive mechanism are disposed within the protective cavity. The power assembly includes a drive shaft, a drive gear, and a driven gear meshing with the drive gear. The drive shaft passes through the shaft hole of the drive gear and is clearance-fitted with the inner wall of the shaft hole. The drive mechanism is connected to the drive shaft and is used to drive the drive shaft to rotate the drive gear.

[0014] In one embodiment, the drive mechanism includes a rotor and a stator. The sealing housing also has a mounting cavity that communicates with the sealing cavity. The rotor is disposed in the mounting cavity and connected to the drive shaft. The stator is disposed outside the sealing housing. The rotor can drive the drive shaft to rotate under the action of the stator.

[0015] In one embodiment, the driving mechanism includes a magnetic coupling and a drive motor. The magnetic coupling includes an inner magnetic rotor and an outer magnetic rotor. An installation cavity communicating with the sealing cavity is also formed inside the sealing shell. The inner magnetic rotor is disposed in the installation cavity and connected to the drive shaft. The outer magnetic rotor is disposed outside the sealing shell and connected to the drive motor. The drive motor is used to drive the outer magnetic rotor to rotate so as to drive the inner magnetic rotor to rotate.

[0016] In one embodiment, there are two pump body mechanisms and two connecting mechanisms, and each pump body mechanism is mounted on one connecting mechanism. The two connecting mechanisms are respectively arranged on opposite sides of the drive mechanism. The drive mechanism is used to synchronously drive the power components of the two pump body mechanisms to pump fluid.

[0017] The aforementioned fluid pumping device, with its power component located within the fluid pumping chamber of the pump body assembly, operates within this chamber during use to pump the fluid. The pump body assembly is housed within a sealed cavity, with spring washers positioned between the pump body assembly and the bottom wall of the sealed cavity, and elastic sealing rings positioned between the pump body assembly and the side walls of the sealed cavity. This design provides several advantages: firstly, the sealed cavity further protects the pump body assembly; secondly, the spring washers effectively absorb axial movement of the pump body assembly during operation, absorbing fluid pressure pulsations, thereby reducing noise and vibration, minimizing wear on components, reducing impact on the surrounding working environment, and improving the stability and service life of the fluid pumping device; and thirdly, the elastic sealing rings reduce the possibility of fluid leakage within the pumping chamber, improving sealing during the pumping process. Through the spring washers and elastic sealing rings, the normal operation and efficiency of the fluid pumping device are ensured, meeting the performance and high reliability requirements of industrial automation and precision control. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown in the drawings only as examples and not necessarily to actual scale.

[0021] Figure 1 This is a schematic diagram of the fluid pumping device in the first embodiment.

[0022] Figure 2 for Figure 1 The fluid pumping device shown is a cross-sectional view along line AA.

[0023] Figure 3 for Figure 1 The fluid pumping device shown is a cross-sectional view along line BB.

[0024] Figure 4 for Figure 2 A sectional view of the pump body mechanism and connecting mechanism.

[0025] Figure 5 for Figure 4 A schematic diagram of the structure of the spring washer in the image.

[0026] Figure 6 This is a schematic diagram of the fluid pumping device in the second embodiment.

[0027] Figure 7 This is a schematic diagram of the fluid pumping device in the third embodiment.

[0028] Figure 8 This is a schematic diagram of the fluid pumping device in the fourth embodiment.

[0029] Figure 9 for Figure 8 A cross-sectional view of the fluid pumping device shown.

[0030] Figure 10 This is a schematic diagram of the fluid pumping device in the fifth embodiment.

[0031] Figure 11 for Figure 10 A cross-sectional view of the fluid pumping device shown.

[0032] Explanation of reference numerals in the attached figures:

[0033] Fluid pumping device 10; pump body mechanism 100; pump body assembly 110; pump body end cover 112; cover part 1122; connecting part 1124; sealing groove 1126; pump body 113; pump body bottom cover 114; positioning groove 115; power assembly 120; driving gear 122; driven gear 124; first coupling 130; second coupling 140; connecting mechanism 200; spring washer 210; elastic sealing ring 220; sealing shell 230; sealing cavity 231; abutment part 232; mounting cavity 233; connecting plate 240; drive mechanism 300; rotor 310; stator 320; magnetic coupling 330; inner magnetic rotor 332; outer magnetic rotor 334; drive motor 340; protective shell 400; protective cavity 410; mounting plate 420; fastener 500. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] See Figures 1 to 4 The fluid pumping device 10 in one embodiment of this application can at least improve the sealing performance of fluid pumping, thereby ensuring the normal operation and working efficiency of the fluid pumping device 10, so as to meet the requirements of industrial automation and precision control for the performance and high reliability of the fluid pumping device 10.

[0036] Specifically, the fluid pumping device 10 includes a pump body mechanism 100 and a connecting mechanism 200. The pump body mechanism 100 includes a pump body assembly 110 and a power assembly 120. A fluid pumping chamber is formed inside the pump body assembly 110, and the power assembly 120 is disposed inside the fluid pumping chamber. The connecting mechanism 200 includes a spring washer 210, an elastic sealing ring 220, and a sealing shell 230. A sealing cavity 231 is formed inside the sealing shell 230. The pump body assembly 110 is disposed inside the sealing cavity 231. The spring washer 210 is disposed between the bottom wall of the sealing cavity 231 and the pump body assembly 110, and the elastic force direction of the spring washer 210 is from the pump body assembly 110 to the bottom wall of the sealing cavity 231. The elastic sealing ring 220 is disposed between the pump body assembly 110 and the side wall of the sealing cavity 231.

[0037] In use, the drive power assembly 120 operates within the fluid pumping chamber to pump the fluid. Since the pump body assembly 110 is located within the sealing chamber 231, a spring washer 210 is positioned between the pump body assembly 110 and the bottom wall of the sealing chamber 231, and an elastic sealing ring 220 is positioned between the pump body assembly 110 and the side wall of the sealing chamber 231. On one hand, the sealing chamber 231 of the sealing shell 230 further protects the pump body assembly 110. On the other hand, the spring washer 210 effectively absorbs axial movement of the pump body assembly during operation and absorbs fluid pressure pulsations, thereby reducing noise and vibration during operation, reducing wear on various components, reducing the impact on the surrounding working environment, and improving the stability and service life of the fluid pumping device 10. Furthermore, the elastic sealing ring 220 reduces the possibility of fluid leakage within the fluid pumping chamber, improving the sealing performance during fluid pumping. The spring washer 210 and the elastic sealing ring 220 can ensure the normal operation and efficiency of the fluid pumping device 10, so as to meet the requirements of industrial automation and precision control for the performance and high reliability of the fluid pumping device 10.

[0038] See also Figure 4 In one embodiment, the pump body assembly 110 includes a pump body end cover 112, a pump body 113, and a pump body bottom cover 114. A fluid pumping chamber is formed within the pump body 113. The pump body end cover 112 and the pump body bottom cover 114 are located on opposite sides of the pump body 113. A spring washer 210 abuts between the pump body bottom cover 114 and the sealing shell 230. An elastic sealing ring 220 is located between the pump body end cover 112 and the inner wall of the sealing shell 230. The outer walls of the pump body end cover 112, the pump body 113, and the bottom cover 114 are all in contact with the inner wall of the sealing chamber 231. Since there are seams between the pump body end cover 112 and the pump body bottom cover 114 and the pump body 113, the sealing effect of the fluid pumping chamber can be effectively guaranteed by setting the elastic sealing ring 220 between the pump body end cover 112 and the inner wall of the sealing shell 230. Meanwhile, the two opposing surfaces of the pump body 113 forming the fluid pumping chamber are interconnected, facilitating the installation of the power assembly 120 into the fluid pumping chamber. Furthermore, since the spring washer 210 is located on the side of the pump body bottom cover 114 facing away from the pump body 113 and is positioned between the pump body bottom cover 114 and the sealing shell 230, the spring washer 210 can provide pre-tightening force for the connection between the pump body bottom cover 114 and the pump body 113. This allows the two end faces of the power assembly 120 to fit more tightly with the pump body bottom cover 114 and the pump body end cover 112, reducing axial movement of the power assembly 120, achieving a more stable pressure output, and thus reducing noise and vibration during use.

[0039] See again Figures 2 to 4In one embodiment, the spring washer 210 is disposed on the side of the pump body bottom cover 114 facing away from the pump body 113 and abuts against the bottom wall of the sealing shell 230. Specifically, a positioning groove 115 is provided on the side of the pump body bottom cover 114 facing away from the pump body 113, and the spring washer 210 is disposed in the positioning groove 115. The positioning groove 115 enables the positioning of the spring washer 210.

[0040] See also Figure 5 In this embodiment, the spring washer 210 is a spring. By setting the spring washer 210 as a spring structure, the connection preload between the pump body bottom cover 114 and the pump body 113 can be further increased, the axial movement of the power assembly 120 can be further reduced, and noise and vibration during use can be reduced. Specifically, the spring washer 210 is a two-turn spring, which avoids the spring height being too large, which would affect the compactness of the structural connection, and at the same time avoids the spring height being too small, which would affect the noise reduction effect on the power assembly 120.

[0041] In other embodiments, the spring washer 210 may also be a single-circle spring washer or an elastic rubber ring.

[0042] In this embodiment, the power assembly 120 includes a drive shaft, a drive gear 122, and a driven gear 124 meshing with the drive gear 122. The drive shaft passes through the shaft hole of the drive gear 122 and is clearance-fitted to the inner wall of the shaft hole. Due to the clearance fit between the drive shaft and the hole wall of the drive gear 122, the parallelism of the end faces of the two gears to the contact surfaces between the pump body bottom cover 114 and the pump body end cover 112 is ensured, as well as the perpendicularity of the tooth surfaces of the two gears to the contact surfaces between the pump body bottom cover 114 and the pump body end cover 112 and the two gears. This results in a smaller internal space compression ratio, facilitating low-speed, high-pressure output. Specifically, the pump body end cover 112 has a first channel and a second channel, both of which are connected to the fluid pumping chamber. In use, the drive gear 122 drives the driven gear 124 to rotate synchronously, thereby allowing fluid to enter the fluid pumping chamber from the first channel and exit from the second channel, or vice versa. In this embodiment, the fluid pumping device 10 further includes a drive mechanism 300, which drives the power assembly 120 to pump fluid. Specifically, the drive mechanism 300 is connected to the drive shaft and drives the drive shaft to rotate the drive gear 122.

[0043] Specifically, the pump body mechanism 100 also includes a first pair of connectors 130 and a second pair of connectors 140. The first pair of connectors 130 and the second pair of connectors 140 are respectively installed on the pump body end cover 112, with the first pair of connectors 130 located at the first channel and the second pair of connectors 140 located at the second channel. Figure 1As shown, in the first embodiment, the openings of the first connector 130 and the second connector 140 face the same direction. Figure 6 As shown, in the second embodiment, the openings of the first connector 130 and the second connector 140 are arranged facing away from each other. In other embodiments, the opening orientations of the first connector 130 and the second connector 140 can also be set according to installation requirements.

[0044] See Figure 4 In one embodiment, the sealing shell 230 has an opening on one side, and the opening of the sealing shell 230 is bent to form an abutment portion 232. The pump body end cover 112 includes a cover portion 1122 and a connecting portion 1124. The cover portion 1122 is disposed in the sealing cavity 231 and abuts against the pump body 113. The connecting portion 1124 is formed on the side of the cover portion 1122 facing away from the pump body 113, and the radial dimension of the connecting portion 1124 is larger than the radial dimension of the cover portion 1122, so that the connecting portion 1124 can abut against the abutment portion 232. The elastic sealing ring 220 is located between the abutment portion 232 and the connecting portion 1124. By providing the abutment portion 232 and the connecting portion 1124, the connecting portion 1124 can keep the elastic sealing ring 220 pressed after it is installed with the sealing shell 230. The elastic sealing ring 220 can also provide an elastic sealing effect for the connection between the connecting portion 1124 and the abutment portion 232, and can also help reduce the axial movement of the power component 120, thereby reducing noise during use.

[0045] Specifically, a sealing groove 1126 is formed on the side of the connecting portion 1124 facing the cover portion 1122. The elastic sealing ring 220 is located within the sealing groove 1126. The size of the abutting portion 232 is the same as the size of the sealing groove 1126, so that the abutting portion 232 is positioned at the sealing groove 1126 and abuts against the elastic sealing ring 220. By providing the sealing groove 1126, the elastic sealing ring 220 can be easily positioned without affecting the elastic sealing effect of the elastic sealing ring 220 between the abutting portion 232 and the connecting portion 1124. In this embodiment, the elastic sealing ring 220 is a spring washer. In other embodiments, the elastic sealing ring 220 can also be an elastic rubber ring.

[0046] In one embodiment, the connecting mechanism 200 further includes a connecting plate 240, which is located on the side of the connecting portion 1124 facing the sealing shell 230, and the connecting plate 240 can press the abutment portion 232 into the sealing groove 1126. The fluid pumping device 10 also includes a first fastener, one end of which passes through the connecting plate 240 and the connecting portion 1124 in sequence, so that the connecting plate 240, the connecting portion 1124, and the sealing shell 230 are interconnected. The connecting plate 240 facilitates the fixed connection between the sealing shell 230 and the pump body assembly 110. Of course, in some embodiments, the connecting plate 240 may be omitted.

[0047] See Figures 1 to 3 In one embodiment, the fluid pumping device 10 further includes a protective shell 400, within which a protective cavity 410 is formed. One side of the protective shell 400 has an opening, and a mounting plate 420 is disposed at the opening. The sealing shell 230 and the drive mechanism 300 are both disposed within the protective cavity 410. The mounting plate 420 is connected to and abuts with the pump body end cover 112. By providing the protective shell 400, the pump body assembly 110 can be further protected, while maintaining the stable operation of the drive mechanism 300. Specifically, the drive mechanism 300 is mounted on the inner wall of the protective cavity 410 and connected to the pump body end cover 112 via the mounting plate 420, ensuring a stable connection between the drive mechanism 300, the power assembly 120, and the sealing shell 230.

[0048] In other embodiments, the connecting plate 240 may be omitted. A mounting portion can be directly formed on the protective housing 400 to mate with the side of the connecting portion 1124 facing the sealing housing 230.

[0049] Specifically, the fluid pumping device 10 further includes a second fastener 500, one end of which passes through the mounting plate 420 and the pump body end cover 112 in sequence, so as to connect the pump body assembly 110 and the protective shell 400 to each other. In this embodiment, the second fastener 500 is a screw, which is used to connect the pump body assembly 110 and the protective shell 400 to each other.

[0050] like Figure 1 As shown, in the first embodiment, the mounting plate 420 is an "L"-shaped mounting plate 420. For example... Figure 7 As shown, in the third embodiment, the mounting plate 420 can be a square plate. Of course, the mounting plate 420 can also be a circular plate.

[0051] like Figure 2 and Figure 3 As shown, in one embodiment, a mounting cavity 233 communicating with the sealing cavity 231 is also formed inside the sealing shell 230. The rotating part of the drive mechanism 300 is disposed in the mounting cavity 233 and connected to the power assembly 120. Specifically, the spring washer 210 is located on the bottom wall of the sealing cavity 231.

[0052] like Figure 2 and Figure 3 As shown, in one embodiment, the drive mechanism 300 includes a rotor 310 and a stator 320. The rotor 310 is disposed within the mounting cavity 233 and connected to the power assembly 120. The stator 320 is disposed outside the sealing shell 230. The rotor 310 can drive the power assembly 120 to rotate under the action of the stator 320. Specifically, the rotor 310 is connected to the drive shaft of the power assembly 120, thereby driving the drive gear 122 to rotate, realizing the pumping of fluid.

[0053] like Figure 8 and Figure 9 As shown, in the fourth embodiment, the drive mechanism 300 includes a magnetic coupling 330 and a drive motor 340. The magnetic coupling 330 includes an inner magnetic rotor 332 and an outer magnetic rotor 334. The inner magnetic rotor 332 is disposed in the mounting cavity 233 and connected to the power assembly 120. The outer magnetic rotor 334 is disposed outside the sealing shell 230 and connected to the drive motor 340. The drive motor 340 drives the outer magnetic rotor 334 to rotate, thereby driving the inner magnetic rotor 332 to rotate. By disposing of the inner magnetic rotor 332 within the mounting cavity 233 of the sealing shell 230, the magnetic force between the outer magnetic rotor 334 and the inner magnetic rotor 332 is used to drive the inner magnetic rotor 332, effectively ensuring the sealing performance of the mounting cavity 233, and thus ensuring the sealing performance of the pump body assembly 110. Specifically, the inner magnetic rotor 332 is connected to the drive shaft to drive the drive gear 122 to rotate.

[0054] like Figure 10 and Figure 11 As shown, in the fifth embodiment, there are two pump body mechanisms 100 and two connecting mechanisms 200, with each pump body mechanism 100 correspondingly mounted on one connecting mechanism 200. The two connecting mechanisms 200 are respectively arranged on opposite sides of the drive mechanism 300. The drive mechanism 300 is used to synchronously drive the power components 120 of the two pump body mechanisms 100 to operate synchronously to pump fluid. By setting two pump body mechanisms 100, synchronous pumping of two sets of fluids can be achieved simultaneously under the drive of the drive mechanism 300. In this embodiment, the drive mechanism 300 can be the drive mechanism 300 in the first embodiment or the drive mechanism 300 in the fifth embodiment.

[0055] Specifically, the drive mechanism 300 has one drive motor 340 and two magnetic couplings 330. The two magnetic couplings 330 are located on opposite sides of the drive motor 340, and the two magnetic couplings 330 are connected to the power components 120 of the two pump body mechanisms 100 respectively.

[0056] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fluid pumping device, characterized in that, The fluid pumping device includes: The pump body mechanism includes a pump body assembly and a power assembly. The pump body assembly has a fluid pumping chamber formed within it, and the power assembly is disposed within the fluid pumping chamber. A connecting mechanism includes a spring washer, an elastic sealing ring, and a sealing shell. A sealing cavity is formed inside the sealing shell. The pump body assembly is disposed inside the sealing cavity. The spring washer is disposed between the bottom wall of the sealing cavity and the pump body assembly, and the elastic force direction of the spring washer is from the pump body assembly to the bottom wall of the sealing cavity. The elastic sealing ring is disposed between the pump body assembly and the side wall of the sealing cavity.

2. The fluid pumping device according to claim 1, characterized in that, The pump assembly includes a pump end cover, a pump body, and a pump bottom cover. The pump body has a fluid pumping chamber formed therein. The pump end cover and the pump bottom cover are located on opposite sides of the pump body. The spring washer is located between the pump bottom cover and the sealing shell. The elastic sealing ring is located between the pump end cover and the inner wall of the sealing shell. The outer walls of the pump end cover, the pump body, and the pump bottom cover are all in contact with the inner wall of the sealing chamber.

3. The fluid pumping device according to claim 2, characterized in that, The bottom cover of the pump body has a positioning groove on the side facing away from the pump body, and the spring washer is set in the positioning groove and abuts against the bottom wall of the sealing shell.

4. The fluid pumping device according to claim 2, characterized in that, The spring washer consists of two coils of spring.

5. The fluid pumping device according to claim 2, characterized in that, The sealing shell has an opening on one side, and the opening of the sealing shell is bent to form an abutment portion. The pump body end cover includes a cover portion and a connecting portion. The cover portion is disposed in the sealing cavity and abuts against the pump body. The connecting portion is formed on the side of the cover portion facing away from the pump body, and the radial dimension of the connecting portion is larger than the radial dimension of the cover portion, so that the connecting portion can abut against the abutment portion. The elastic sealing ring is located between the abutment portion and the connecting portion.

6. The fluid pumping device according to claim 5, characterized in that, The connecting part has a sealing groove on the side facing the cover part, the elastic sealing ring is located in the sealing groove, and the size of the abutting part is the same as the size of the sealing groove, so that the abutting part is located at the sealing groove and abuts against the elastic sealing ring.

7. The fluid pumping device according to claim 6, characterized in that, The connecting mechanism further includes a connecting plate located on the side of the connecting portion facing the sealing shell, and the connecting plate can press the abutment portion into the sealing groove. The fluid pumping device further includes a first fastener, one end of which passes through the connecting plate and the connecting portion in sequence, so that the connecting portion, the connecting plate and the sealing shell are connected to each other.

8. The fluid pumping device according to any one of claims 2-7, characterized in that, The fluid pumping device further includes a drive mechanism and a protective shell. A protective cavity is formed inside the protective shell, and the sealing shell and the drive mechanism are both disposed inside the protective cavity. The power assembly includes a drive shaft, a drive gear, and a driven gear meshing with the drive gear. The drive shaft passes through the shaft hole of the drive gear, and the drive shaft is clearance-fitted with the inner wall of the shaft hole of the drive gear. The drive mechanism is connected to the drive shaft and is used to drive the drive shaft to rotate the drive gear.

9. The fluid pumping device according to claim 8, characterized in that, The drive mechanism includes a rotor and a stator. The sealing shell also forms an installation cavity that communicates with the sealing cavity. The rotor is disposed in the installation cavity and connected to the drive shaft. The stator is disposed outside the sealing shell. The rotor can drive the drive shaft to rotate under the action of the stator. or The driving mechanism includes a magnetic coupling and a drive motor. The magnetic coupling includes an inner magnetic rotor and an outer magnetic rotor. An installation cavity communicating with the sealing cavity is also formed inside the sealing shell. The inner magnetic rotor is disposed in the installation cavity and connected to the drive shaft. The outer magnetic rotor is disposed outside the sealing shell and connected to the drive motor. The drive motor is used to drive the outer magnetic rotor to rotate so as to drive the inner magnetic rotor to rotate.

10. The fluid pumping device according to claim 8, characterized in that, The number of pump body mechanisms and the number of connecting mechanisms are both two, and each pump body mechanism is installed on one connecting mechanism. The two connecting mechanisms are respectively arranged on opposite sides of the drive mechanism. The drive mechanism is used to synchronously drive the power components of the two pump body mechanisms to pump fluid.

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