A direct current water pump with high stability

Abstract

The utility model provides a kind of high stability direct current water pump, belong to water pump technical field, including shell;Water cavity is opened in shell, protective shell is set in water cavity, lubricating cavity is opened in protective shell, stator is set in lubricating cavity, rotatable through shaft is set in stator, rotor is set on the side of shaft;Mounting hole is opened in protective shell side, water inlet impeller is connected with the other end of the shaft passing through mounting hole, and liquid inlet back impeller is set, water inlet impeller is located in water cavity, and liquid inlet back impeller is located in lubricating cavity;Through the relative setting water inlet impeller and liquid inlet back impeller in both ends of shaft, water inlet impeller drives fluid delivery in water cavity, while liquid inlet back impeller agitates lubricating fluid in lubricating cavity synchronously, using the reverse thrust of back impeller to offset the axial force generated by water inlet impeller, reduce shafting deviation, reduce bearing wear, improve stability.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and more specifically, it relates to a DC water pump with high stability. Background Technology

[0002] DC water pumps generate fluid power by driving the impeller to rotate through a DC motor. They are widely used in industrial cooling, new energy storage, smart homes, and medical equipment, and are characterized by their compact structure, sensitive response, and ease of control.

[0003] Existing DC water pump motors and impellers are usually rigidly connected. When the motor rotates at high speed, the vibration generated is easily transmitted to the pump body through the shaft system, causing parts to loosen. Traditional DC water pumps improve stability and reduce fluid resistance by adding rubber damping pads or optimizing the impeller shape. However, rubber materials are prone to aging and failure, and can only alleviate local vibrations, making it difficult to solve the wear caused by shaft misalignment. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a highly stable DC water pump. In the prior art, traditional DC water pumps improve stability by adding rubber damping pads or optimizing the impeller shape, but the rubber material is prone to aging and failure, and can only alleviate local vibrations, making it difficult to solve the technical problem of wear caused by shaft misalignment.

[0005] The purpose and effect of this utility model of a highly stable DC water pump are achieved by the following specific technical means:

[0006] A highly stable DC water pump includes a housing;

[0007] The outer shell has a water passage cavity, the water passage cavity is provided with a protective shell, the protective shell has a lubrication cavity, the lubrication cavity is provided with a stator, the stator has a rotating shaft rotatably passing through it, and the rotating shaft has a rotor around its periphery.

[0008] The protective shell has a mounting hole on one side. One end of the rotating shaft passes through the mounting hole and is connected to a water inlet impeller. The other end is provided with a liquid inlet back impeller. The water inlet impeller is located in the water passage cavity, and the liquid inlet back impeller is located in the lubrication cavity.

[0009] According to a preferred embodiment, a liquid inlet cover is provided on one side of the protective shell, a liquid inlet pipe is provided on one side of the liquid inlet cover, a liquid outlet pipe is provided on the top of the protective shell, and two sets of through holes are opened on the top of the outer shell. One end of the liquid inlet pipe and the liquid outlet pipe respectively pass through the two sets of through holes and are connected to an external lubricating fluid supply device.

[0010] According to a preferred embodiment, a mounting frame is provided inside the protective shell, and bushings are provided on both the mounting frame and the mounting hole, with the two ends of the rotating shaft passing through the two sets of bushings respectively.

[0011] According to a preferred embodiment, both ends of the rotating shaft are provided with connectors, and the two sets of connectors are respectively connected to the water inlet impeller and the liquid inlet back impeller.

[0012] According to a preferred embodiment, the protective shell is provided with multiple sets of heat dissipation fins at equal intervals on its periphery, and the bottom of the protective shell is provided with a mounting base, which is connected to the water passage cavity by screws.

[0013] According to a preferred embodiment, a water inlet cover is provided at one end of the outer casing, a water inlet cavity is formed between the water inlet cover and the outer casing, the water inlet impeller is rotatably disposed in the water inlet cavity, the water inlet cavity is connected to the water passage cavity, and a water inlet pipe is provided on one side of the water inlet cover.

[0014] According to a preferred embodiment, a water outlet cover is provided at one end of the outer shell, and a water outlet pipe is provided on one side of the water outlet cover, and the water outlet pipe is connected to the water passage cavity.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting an inlet impeller and a liquid inlet back impeller at both ends of the rotating shaft, when the shaft rotates, the inlet impeller drives the fluid to be transported in the water passage chamber, while the liquid inlet back impeller simultaneously agitates the lubricating fluid in the lubrication chamber. The reverse thrust of the back impeller counteracts the axial force generated by the inlet impeller, reducing shaft misalignment and bearing wear. At the same time, the liquid inlet back impeller promotes the circulation of lubricating fluid to lubricate and cool the stator, rotor, and shaft sleeve, avoiding the problem of increased vibration caused by the aging and failure of traditional rubber vibration damping pads. This improves the stability of water pump operation from both mechanical structure and hydrodynamic aspects.

[0017] 2. By increasing the heat dissipation area through the heat dissipation fins on the periphery of the protective shell, the heat generated by the stator and rotor during operation is quickly dissipated into the fluid in the water passage cavity. The heat is carried away by the fluid flow, preventing the performance degradation caused by motor overheating. At the same time, the heat dissipation fins and the protective shell form a rigid whole, which enhances the structural strength of the pump body, reduces deformation caused by vibration, and avoids the problems of reduced heat dissipation efficiency or structural loosening caused by the separation of the heat dissipation structure from the pump body in traditional water pumps. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the liquid inlet impeller and the rotating shaft after assembly in this utility model;

[0021] Figure 4 for Figure 3 A schematic diagram of the disassembled structure;

[0022] Figure 5 This is a cross-sectional view of the present invention.

[0023] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0024] 11. Outer casing; 12. Water passage cavity; 13. Protective shell; 14. Stator; 15. Shaft; 16. Rotor; 17. Mounting hole; 18. Inlet impeller; 19. Connector; 20. Inlet cover; 21. Inlet cavity; 22. Inlet pipe; 23. Outlet cover; 24. Outlet pipe; 31. Lubrication cavity; 32. Liquid inlet impeller; 33. Liquid inlet cover; 34. Liquid inlet pipe; 35. Outlet pipe; 36. Mounting frame; 37. Shaft sleeve; 38. Heat dissipation fins; 39. Mounting base. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] Example:

[0027] As attached Figure 1 To be continued Figure 5 As shown:

[0028] This utility model provides a highly stable DC water pump, including a housing 11, a water passage cavity 12 inside the housing 11, a protective shell 13 inside the water passage cavity 12, a lubrication cavity 31 inside the protective shell 13, a stator 14 inside the lubrication cavity 31, a rotating shaft 15 rotatably passing through the stator 14, a rotor 16 arranged around the rotating shaft 15, a mounting hole 17 on one side of the protective shell 13, one end of the rotating shaft 15 passing through the mounting hole 17 and connected to an inlet impeller 18, and the other end is provided with an inlet back impeller 32. The inlet impeller 18 is located in the water passage cavity 12, and the inlet back impeller 32 is located in the lubrication cavity 31.

[0029] Specifically, an inlet impeller 18 and a liquid inlet back impeller 32 are respectively installed at both ends of the rotating shaft 15. When the rotating shaft 15 rotates, the inlet impeller 18 drives the fluid to be transported in the water passage chamber 12, while the liquid inlet back impeller 32 stirs the lubricating fluid in the lubrication chamber 31. With the reverse thrust generated by the liquid inlet back impeller 32, the axial force generated when the inlet impeller 18 is running can be offset, thereby reducing shaft misalignment and reducing bearing wear.

[0030] Please refer to, for example Figure 3 and Figure 4 As shown, a liquid inlet cover 33 is provided on one side of the protective shell 13, and a liquid inlet pipe 34 is connected to one side of the liquid inlet cover 33. A liquid outlet pipe 35 is provided on the top of the protective shell 13. Two sets of through holes are opened on the top of the outer shell 11. One end of the liquid inlet pipe 34 and the liquid outlet pipe 35 pass through these two sets of through holes respectively and are connected to the external lubricating fluid supply equipment.

[0031] Specifically, the inlet impeller 32 drives the flow of lubricating fluid, which lubricates and cools the stator 14, rotor 16 and shaft sleeve 37, avoiding the problem of increased vibration caused by the aging and failure of traditional rubber vibration damping pads. This improves the stability of the water pump operation from both mechanical structure and hydrodynamic aspects.

[0032] Multiple sets of heat dissipation fins 38 are evenly distributed around the protective shell 13. These heat dissipation fins 38 increase the heat dissipation area and can quickly dissipate the heat generated by the stator 14 and rotor 16 during operation into the fluid in the water passage 12. The heat is carried away by the flow of the fluid, preventing the water pump performance from deteriorating due to overheating. At the same time, the heat dissipation fins 38 and the protective shell 13 form a rigid whole, which enhances the structural strength of the pump body, reduces deformation caused by vibration, and avoids the problems of reduced heat dissipation efficiency or structural loosening caused by the separation of the heat dissipation structure from the pump body in traditional water pumps.

[0033] The bottom of the protective shell 13 is provided with a mounting base 39, which is connected to the water passage cavity 12 by screws to achieve fixed installation of the protective shell 13 in the water passage cavity 12.

[0034] Please refer to, for example Figure 4 and Figure 5 As shown, a mounting frame 36 is provided inside the protective shell 13. Both the mounting frame 36 and the mounting hole 17 are provided with bushings 37. The two ends of the rotating shaft 15 are respectively inserted into the two sets of bushings 37.

[0035] Specifically, the bushing 37 provides rigid support for the rotating shaft 15, limiting its radial and axial displacement, effectively solving the problem of wear caused by shaft misalignment. The mounting frame 36 is used to fix the position of the bushing 37, ensuring the coaxiality of the rotating shaft 15 when it rotates, and reducing the vibration caused by shaft shaking. This structure does not rely on rubber damping pads, avoiding the stability reduction problem caused by the aging of elastic materials. At the same time, the lubricating film formed between the bushing 37 and the rotating shaft 15 can reduce frictional resistance and extend the service life of the water pump.

[0036] Both ends of the rotating shaft 15 are provided with connectors 19. The two sets of connectors 19 are respectively connected to the water inlet impeller 18 and the liquid inlet back impeller 32 to realize the transmission connection between the rotating shaft 15 and the water inlet impeller 18 and the liquid inlet back impeller 32.

[0037] Please refer to, for example Figure 2As shown, a water inlet cover 20 is provided at one end of the outer casing 11, and a water inlet cavity 21 is formed between the water inlet cover 20 and the outer casing 11. The water inlet impeller 18 is rotatably disposed in the water inlet cavity 21. The water inlet cavity 21 is connected to the water passage cavity 12. A water inlet pipe 22 is provided on one side of the water inlet cover 20. Fluid enters the water inlet cavity 21 through the water inlet pipe 22, and then enters the water passage cavity 12 driven by the water inlet impeller 18.

[0038] One end of the outer casing 11 is provided with a water outlet cover 23, and a water outlet pipe 24 is provided on one side of the water outlet cover 23. The water outlet pipe 24 is connected to the water passage chamber 12, and the fluid transported by the water inlet impeller 18 in the water passage chamber 12 is discharged through the water outlet pipe 24.

[0039] The specific usage and function of this embodiment: When the water pump is used, the rotating shaft 15 is installed inside the stator 14, and both ends are connected to the inlet impeller 18 and the liquid inlet back impeller 32 through the connector 19 to form a transmission structure. The inlet cover 20 is connected to one end of the outer shell 11 to form the inlet chamber 21. The inlet pipe 22 is connected to the inlet cover 20. The fluid enters the inlet chamber 21 through the inlet pipe 22, flows into the water chamber 12 after being driven by the inlet impeller 18, and is discharged through the outlet pipe 24 on the outlet cover 23 to complete the fluid transportation.

[0040] When the shaft 15 rotates, the inlet impeller 18 pushes the fluid in the water passage chamber 12 to generate axial force. At this time, the liquid inlet back impeller 32 rotates synchronously in the lubrication chamber 31, which causes the lubricating fluid to generate reverse thrust, counteracting the axial force of the inlet impeller 18 and reducing the axial displacement of the shaft 15. The bushing 37 is fitted on both ends of the shaft 15 and cooperates with the mounting frame 36 to limit the radial displacement of the shaft 15, reduce bearing wear, and extend the service life of the water pump.

[0041] When the inlet impeller 32 rotates, it agitates the lubricating fluid, causing it to flow into the lubrication chamber 31 from the inlet pipe 34 on the inlet cover 33. After being pushed by the inlet impeller 32, the lubricating fluid flows over the surfaces of the stator 14, rotor 16 and bushing 37, forming a lubricating film and carrying away heat. Finally, it is discharged from the outlet pipe 35 at the top of the protective shell 13 and circulated and cooled by external equipment. The flow of the lubricating fluid reduces friction and vibration between components and improves operational stability.

[0042] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A highly stable DC water pump, characterized in that: Includes an outer shell (11); The outer shell (11) has a water passage cavity (12) inside, a protective shell (13) is provided inside the water passage cavity (12), a lubrication cavity (31) is provided inside the protective shell (13), a stator (14) is provided inside the lubrication cavity (31), a rotating shaft (15) is rotatably passed through the stator (14), and a rotor (16) is provided around the rotating shaft (15). The protective shell (13) has a mounting hole (17) on one side. One end of the rotating shaft (15) passes through the mounting hole (17) and is connected to the water inlet impeller (18). The other end is provided with a liquid inlet back impeller (32). The water inlet impeller (18) is located in the water passage cavity (12), and the liquid inlet back impeller (32) is located in the lubrication cavity (31).

2. The highly stable DC water pump according to claim 1, characterized in that: The protective shell (13) is provided with a liquid inlet cover (33) on one side, and a liquid inlet pipe (34) is provided on one side of the liquid inlet cover (33). The protective shell (13) is provided with a liquid outlet pipe (35) on the top. The outer shell (11) has two sets of through holes on the top. One end of the liquid inlet pipe (34) and the liquid outlet pipe (35) respectively pass through the two sets of through holes and are connected to an external lubricating fluid supply device.

3. The highly stable DC water pump according to claim 1, characterized in that: The protective shell (13) is provided with an installation frame (36), and both the installation frame (36) and the installation hole (17) are provided with bushings (37). The two ends of the rotating shaft (15) are respectively inserted into the two sets of bushings (37).

4. A highly stable DC water pump according to claim 1, characterized in that: Both ends of the rotating shaft (15) are provided with connectors (19), and the two sets of connectors (19) are respectively connected to the water inlet impeller (18) and the liquid inlet back impeller (32).

5. A highly stable DC water pump according to claim 1, characterized in that: The protective shell (13) has multiple sets of heat dissipation fins (38) evenly spaced around its periphery, and the bottom of the protective shell (13) is provided with a mounting base (39), which is connected to the water passage cavity (12) by screws.

6. A highly stable DC water pump according to claim 1, characterized in that: A water inlet cover (20) is provided at one end of the outer shell (11), and a water inlet cavity (21) is formed between the water inlet cover (20) and the outer shell (11). The water inlet impeller (18) is rotatably disposed in the water inlet cavity (21). The water inlet cavity (21) is connected to the water passage cavity (12). A water inlet pipe (22) is provided on one side of the water inlet cover (20).

7. A highly stable DC water pump according to claim 6, characterized in that: The outer shell (11) is provided with a water outlet cover (23) at one end, and a water outlet pipe (24) is provided on one side of the water outlet cover (23), and the water outlet pipe (24) is connected to the water passage cavity (12).

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