Axial turbine permanent magnet brushless water pump

Abstract

The utility model provides an axial turbine permanent magnet brushless water pump which comprises a pump body and an impeller. The pump body is axially provided with a fluid channel, stators are arranged in the pump body, each stator comprises a stator iron core and a coil, and a plurality of stators are arranged around the circumference of the fluid channel; the impeller is located in the fluid channel and comprises a rotating shaft and a plurality of blades arranged on the rotating shaft, the rotating shaft is arranged on a shaft seat arranged on the pump body, the blades are spirally arranged in the axial direction, and permanent magnets are arranged at the ends, away from the rotating shaft, of the blades so that the stator can drive the permanent magnets through electromagnetic force to achieve rotation of the impeller. In the embodiment of the utility model, the working mode of the permanent magnet brushless motor is utilized to enable the stator to drive the impeller to rotate through electromagnetic force and the permanent magnet, so that the spiral blades on the impeller push fluid to axially flow through the channel, and the fluid is pumped; the impeller is located in the pump body, so that the water pump is compact in overall structure and small in occupied space; the impeller is directly driven through electromagnetic force, a mechanical transmission structure is not needed, and the driving efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps, and in particular relates to an axial turbine permanent magnet brushless water pump. Background Art

[0002] In traditional fluid delivery systems, centrifugal pumps are widely used devices that rely on the drive of an electric motor to accelerate and deliver fluids. This type of centrifugal pump design includes a pump body and an electric motor that is usually located on one side of the pump body, and the two are connected by a shaft. Although this structure is simple, it has several obvious disadvantages:

[0003] 1. Space occupation: The traditional centrifugal pump has a large overall volume due to the combination of the pump body and the motor, especially in terms of axial length. In addition, in order to generate sufficient centrifugal force to pump the fluid, the pump body is generally equipped with an impeller with a larger diameter, which makes the outer dimensions of the pump body itself larger. This type of pump is difficult to apply to applications with limited space.

[0004] 2. Transmission efficiency: Since the force between the motor and the pump body is transmitted through the shaft, this direct mechanical connection method will have a certain amount of energy loss during the transmission process. The low efficiency is usually manifested in incomplete power transmission, resulting in reduced overall system efficiency.

[0005] 3. High energy consumption: In the process of the motor driving the pump, the heat of the motor itself and the friction heat during operation may cause the overall system temperature to rise, which not only affects the stability and service life of the equipment, but may also increase additional cooling requirements, thereby further reducing the energy efficiency of the system. The motor of the centrifugal pump generally adopts a three-phase asynchronous motor. Although this motor has a simple structure and low cost, its efficiency is not optimal, especially when it is running at partial load. The efficiency will drop significantly. The asynchronous motor has slip during startup and operation, that is, the actual operating speed is lower than the synchronous speed. This slip causes the motor's electrical energy to be partially converted into heat energy, which cannot be effectively converted into mechanical energy, thereby further increasing the overall energy consumption. Utility Model Content

[0006] In view of the deficiencies existing in the related technologies, the utility model provides an axial turbine permanent magnet brushless water pump to solve the problems of large space occupation, low transmission efficiency and high energy consumption of the centrifugal pump system.

[0007] The utility model provides an axial turbine permanent magnet brushless water pump, comprising a pump body and an impeller;

[0008] The pump body is axially provided with a fluid channel, and the pump body is provided with a stator, the stator comprising a stator core and a coil wound on the stator core, and a plurality of stators are provided on the same circumference around the fluid channel;

[0009] The impeller is located in the fluid channel, and includes a rotating shaft and a plurality of blades mounted on the rotating shaft. The rotating shaft is mounted on a shaft seat provided on the pump body, and the blades are arranged in a spiral shape along the axial direction. A permanent magnet is installed at one end of the blade away from the rotating shaft, so that the stator drives the permanent magnet through electromagnetic force to realize the rotation of the impeller.

[0010] In some of the embodiments, permanent magnets are mounted on the blades, and each permanent magnet is aligned with a corresponding stator in the radial direction.

[0011] In some of the embodiments, the stator is arranged in a spiral shape along the axial direction to match the blades, and the permanent magnets are arranged in multiple pieces along the blades.

[0012] In some of the embodiments, the permanent magnet is in clearance fit with an inner wall of the fluid channel.

[0013] In some of the embodiments, the blade includes a driving portion and a mounting portion;

[0014] One end of the driving part is vertically connected to the mounting part, and the other end is connected to the rotating shaft;

[0015] A mounting groove is formed on a side of the mounting portion away from the driving portion, and the permanent magnet is mounted in the mounting groove.

[0016] In some embodiments, the pump body includes an outer seat and an inner cylinder, both of which are cylindrical, a fixing groove is opened on the inner wall of the outer seat, the stator is installed in the fixing groove, and the outer seat is coaxially sleeved on the inner cylinder so that the inner cylinder closes the opening of the fixing groove and uses its internal space as the fluid channel.

[0017] In some embodiments, the fixing groove is a T-shaped groove, both ends of which extend to the end surfaces at both ends of the outer seat and form ports on the end surfaces;

[0018] The pump body further includes an annular end cover, two of which are respectively mounted on the end surfaces at both ends of the outer seat, both ends of the inner tube are attached to the corresponding end covers, and the two end covers respectively close the ports at both ends.

[0019] In some embodiments, the shaft seat is mounted on the end cover, which includes a centrally located shaft sleeve and a plurality of support rods fixedly connected to the shaft sleeve, the shaft sleeve is sleeved with the rotating shaft, and one end of the support rod away from the shaft sleeve is fixed to the inner wall of the end cover.

[0020] In some embodiments, the shaft seat is installed on both end covers.

[0021] In some embodiments, a limiting ring is coaxially fixedly installed on the end face of the end cover close to the outer seat, and the limiting ring is sleeved on the inner cylinder and attached to the end face of the outer seat. A step is annularly arranged on the end face of the end cover close to the outer seat, which is used to sleeve and install an annular sealing gasket on the end cover, and the end cover presses and fixes the sealing gasket on the end face of the outer seat.

[0022] Based on the above technical scheme, in the embodiment of the utility model, an impeller is installed in the channel axially arranged inside the pump body, an iron core wound with a coil is installed inside the pump body as a stator, and an impeller with a permanent magnet is installed as a rotor. The working mode of the permanent magnet brushless motor is used to drive the stator to rotate the impeller through electromagnetic force and permanent magnets, so that the spiral blades on the impeller push the fluid to flow axially through the channel to achieve pumping of the fluid; the impeller is located inside the pump body, so that the overall structure of the water pump is compact and occupies a small space; the impeller is directly driven by electromagnetic force, and there is no need to set a mechanical transmission structure, and the driving efficiency is high; the driving of the impeller is displayed by the working mode of the permanent magnet brushless motor, and the electrical energy can be more converted into kinetic energy, and the energy utilization efficiency is high, and the stator that is powered on and heated is in the pump body that is in direct contact with the fluid, so that the heat generated by it can be directly transferred to the fluid through the pump body, and the water pump can be dissipated while the fluid is pumped. The water pump does not need to be additionally equipped with a heat dissipation device, thereby reducing the working energy consumption and solving the problems of large space occupation, low transmission efficiency and high energy consumption of the centrifugal pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of the axial turbine permanent magnet brushless water pump of the utility model;

[0025] Figure 2 This is an exploded structural diagram of the axial turbine permanent magnet brushless water pump of the utility model;

[0026] Figure 3 This is a cross-sectional view of the utility model axial turbine permanent magnet brushless water pump Figure 1 ;

[0027] Figure 4 This is a cross-sectional view of the utility model axial turbine permanent magnet brushless water pump Figure 2 ;

[0028] Figure 5 This is a schematic diagram of the structure of the inner and outer seats of the axial turbine permanent magnet brushless water pump of the utility model;

[0029] Figure 6This is a schematic diagram of the structure of the impeller in the axial turbine permanent magnet brushless water pump of the utility model;

[0030] In the figure:

[0031] 1. Pump body; 11. Fluid channel; 12. Stator; 13. Outer seat; 14. Inner cylinder; 15. Fixing groove; 16. End cover; 17. Shaft seat; 171. Shaft sleeve; 172. Support rod; 18. Limiting ring;

[0032] 2. Impeller; 21. Rotating shaft; 22. Blades; 221. Driving unit; 222. Mounting unit; 223. Mounting slot; 23. Permanent magnet. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figures 1 to 6As shown, in an illustrative embodiment of the axial turbine permanent magnet brushless water pump of the utility model, the axial turbine permanent magnet brushless water pump includes a pump body 1 and an impeller 2.

[0038] The pump body 1 is axially provided with a fluid channel 11 , and a stator 12 is installed in the pump body 1 . The stator 12 includes a stator core and a coil wound on the stator core. A plurality of stators 12 are arranged on the same circumference around the fluid channel 11 .

[0039] The impeller 2 is located in the fluid channel 11, and includes a rotating shaft 21 and a plurality of blades 22 mounted on the rotating shaft 21. The rotating shaft 21 is mounted on a shaft seat 17 provided on the pump body 1, and the blades 22 are spirally arranged along the axial direction. A permanent magnet 23 is installed at one end of the blade 22 away from the rotating shaft 21.

[0040] The pump body 1 and the impeller 2 are combined into a permanent magnet brushless motor structure, and the iron core wound with the coil constitutes an electromagnet structure. After the coil of the stator 12 is powered, the stator 12 generates an electromagnetic force, which acts on the permanent magnet 23, thereby driving the impeller 2 to rotate. The spiral blades 22 drive the fluid to move axially as the impeller 2 rotates, so that the fluid passes axially through the fluid channel 11 to achieve pumping of the fluid.

[0041] The impeller 2 is installed in the flow channel of the pump body 1 and nested with each other, making the overall structure of the water pump compact and the axial size small; in addition, the impeller 2 can pump the fluid through the spiral blades 22, which does not require a large outer diameter, reducing the radial size of the water pump and making the overall space occupied by the water pump small.

[0042] The stator 12 of the pump body 1 realizes transmission with the impeller 2 through electromagnetic force. Compared with mechanical transmission, the transmission efficiency is high and the transmission efficiency will not be reduced due to the friction of mechanical transmission parts.

[0043] The impeller 2 is driven by a permanent magnet brushless motor. Compared with a three-phase asynchronous motor, the efficiency of converting electrical energy into kinetic energy is higher, thereby improving the utilization rate of electrical energy and reducing energy consumption.

[0044] When the fluid passes through the fluid channel 11, it can take away the heat on the pump body 1, thereby dissipating the heat of the stator 12, allowing it to work stably for a long time without the need for additional heat dissipation devices, thereby eliminating the energy consumption required for the heat dissipation device and reducing the energy consumption of the water pump.

[0045] In the above-mentioned schematic embodiment, the axial turbine permanent magnet brushless water pump has a compact structure, and its axial and radial dimensions are small, which reduces the space occupied. The driving mode of the permanent magnet brushless motor realizes the driving of the impeller 2, has high energy conversion efficiency, and low energy loss. The fluid can be pumped and dissipated at the same time, eliminating the additional energy consumption generated by the heat dissipation of the motor structure, and solving the problems of large space occupation, low transmission efficiency and high energy consumption of the centrifugal pump system.

[0046] In some embodiments, the blades 22 are all equipped with permanent magnets 23, and each permanent magnet 23 is radially aligned with a corresponding stator 12. In order to improve the efficiency of electromagnetic drive, a permanent magnet 23 is installed on each blade 22 of the impeller 2, and each permanent magnet 23 can be aligned with the corresponding stator 12 at the same time, so that the electromagnetic force generated by each stator 12 can continue to act on the permanent magnet 23 rotated to its angular position, and the impeller 2 can continue to be driven by the electromagnetic force.

[0047] In some embodiments, the stator 12 is arranged in a spiral shape along the axial direction to match the blade 22. Multiple permanent magnets are arranged along the blade 22, so that the permanent magnets 23 arranged one by one are spiral along the blade 22. Since the stator 12 also has a spiral structure matching the blade 22, the permanent magnets at various positions in the length direction of the impeller 2 can be aligned with the stator 12 at the same time, and the electromagnetic force generated by the stator 12 can be fully aligned and driven in the length direction of the impeller 2, thereby improving the electromagnetic drive efficiency.

[0048] In some embodiments, the permanent magnet 23 is matched with the inner wall gap of the fluid channel 11, so that the permanent magnet 23 is as close to the stator 12 in the pump body 1 as possible without contacting the inner wall of the fluid channel 11, so that the electromagnetic force generated by the stator 12 can act tangentially on the permanent magnet 23 to the greatest extent, thereby improving the efficiency of the electromagnetic force driving the impeller 2.

[0049] In some embodiments, the blade 22 includes a driving portion 221 and a mounting portion 222. One end of the driving portion 221 is vertically connected to the mounting portion 222, and the other end is connected to the rotating shaft 21. The driving portion 221 is radially arranged and spirally formed with the impeller 2, and when the impeller 2 rotates, it pushes the fluid to flow axially.

[0050] A mounting groove 223 is provided on one side of the mounting portion 222 away from the driving portion 221, and the permanent magnet 23 is mounted in the mounting groove 223. The permanent magnet 23 is located on the outermost mounting portion 222 of the impeller 2, so that the permanent magnet 23 and the inner wall of the fluid channel 11 are matched with each other in a clearance manner. The permanent magnet 23 is placed close to the stator 12, and the vertically arranged mounting portion 222 faces the inner wall of the flow channel, so that the mounted permanent magnet 23 faces the stator 12 with a larger area, thereby improving the electromagnetic drive efficiency.

[0051] In some embodiments, the pump body 1 includes an outer seat 13 and an inner tube 14 , both of which are cylindrical. A fixing groove 15 is opened on the inner wall of the outer seat 13 , and the stator 12 is installed in the fixing groove 15 . The coaxial sleeve 171 of the outer seat 13 is arranged on the inner tube 14 .

[0052] The pump body 1 is formed by two cylindrical structures nested with each other, and the hollow space inside the inner cylinder 14 can be used to form the fluid channel 11. The inner wall of the pump body 1 is provided with a fixing groove 15 to accommodate the stator 12, and the opening of the fixing groove 15 is closed by the inserted inner cylinder 14 to prevent the fluid in the fluid channel 11 from flowing into the fixing groove 15. The outer seat 13 and the inner cylinder 14 are simple to process and easy to assemble. The fixing groove 15 can be processed by turning, and it is easy to set it into a spiral shape, which is convenient for matching the spiral stator 12.

[0053] In some embodiments, the fixing slot 15 is a T-slot, and its two ends extend to the end surfaces of the two ends of the outer seat 13 and form ports on the end surfaces. The stator 12 installed in the fixing slot 15 is fixed in the radial limit position through the narrowed opening of the T-slot.

[0054] The pump body 1 further includes an annular end cover 16, two of which are respectively mounted on the end surfaces of the two ends of the outer seat 13, and both ends of the inner cylinder 14 are attached to the corresponding end covers 16. The two end covers 16 respectively close the ports at both ends, thereby fixing the stator 12 in the mounting and fixing groove 15 in the axial upper limit position, and at the same time, the two end covers 16 limit and fix the inner cylinder 14 inside the outer seat 13. In addition, the end cover 16 can be used as a flange to connect the water pump to the pipeline, which is convenient for the installation of the water pump.

[0055] Through the T-slot structure and the end cover 16, the casing limits and fixes the stator 12 in the fixing slot 15, and at the same time limits and fixes the inner cylinder 14, keeping the opening of the fixing slot 15 closed, so that the installation of the stator 12 does not require an additional fixing structure, simplifying the structure of the pump body 1 and reducing the manufacturing cost.

[0056] In some embodiments, the shaft seat 17 is mounted on the end cover 16, and includes a shaft sleeve 171 located in the center and a plurality of support rods 172 fixedly connected to the shaft sleeve 171. The shaft sleeve 171 is sleeved with the rotating shaft 21, and one end of the support rod 172 away from the shaft sleeve 171 is fixed to the inner wall of the end cover 16. The shaft sleeve 171 is supported by the support rods 172 to realize the rotational installation of the rotating shaft 21, and there is a large interval between adjacent support rods 172 to ensure the circulation of the fluid.

[0057] In some embodiments, the shaft seat 17 is installed on both end covers 16 , so that the impeller 2 remains coaxial with the pump body 1 under the support of the shaft seat 17 .

[0058] In some embodiments, a limiting ring 18 is coaxially fixedly installed on the end surface of the end cover 16 close to the outer seat 13 . The limiting ring 18 is sleeved on the inner cylinder 14 and attached to the end surface of the outer seat 13 .

[0059] The inner hole of the structure of the combination of the limiting ring 18 and the end cover 16 is stepped, which can better match the end of the inner tube 14 and enhance its limiting effect on the inner tube 14. In addition, the limiting ring 18 separates the end cover 16 from the outer seat 13, so that the end cover 16 and the outer seat 13 bracket can be installed with a resilient sealing gasket, which can increase the sealing of the end cover 16 to the end of the outer seat 13 and play a buffering role to prevent the vibration generated when the water pump is running from being transmitted to the pipeline connected through the end cover 16.

[0060] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. An axial turbine permanent magnet brushless water pump, characterized in that: Including pump body and impeller; The pump body is axially provided with a fluid channel, and a stator is installed in the pump body, the stator includes a stator core and a coil wound on the stator core, and a plurality of stators are arranged on the same circumference around the fluid channel; The impeller is located in the fluid channel, and includes a rotating shaft and a plurality of blades mounted on the rotating shaft. The rotating shaft is mounted on a shaft seat provided on the pump body, and the blades are arranged in a spiral shape along the axial direction. A permanent magnet is installed at one end of the blade away from the rotating shaft, so that the stator drives the permanent magnet through electromagnetic force to realize the rotation of the impeller.

2. The axial turbine permanent magnet brushless water pump according to claim 1, characterized in that: The blades are all equipped with permanent magnets, and each permanent magnet is aligned with a corresponding stator in the radial direction.

3. The axial turbine permanent magnet brushless water pump according to claim 1, characterized in that: The stator is arranged in a spiral shape along the axial direction to match the blades, and a plurality of permanent magnets are arranged along the blades.

4. The axial turbine permanent magnet brushless water pump according to claim 1, characterized in that: The permanent magnet is in clearance fit with the inner wall of the fluid channel.

5. The axial turbine permanent magnet brushless water pump according to any one of claims 1 to 4, characterized in that: The blade comprises a driving portion and a mounting portion; One end of the driving part is vertically connected to the mounting part, and the other end is connected to the rotating shaft; A mounting groove is formed on a side of the mounting portion away from the driving portion, and the permanent magnet is mounted in the mounting groove.

6. The axial turbine permanent magnet brushless water pump according to claim 1, characterized in that: The pump body includes an outer seat and an inner cylinder, both of which are cylindrical. A fixing groove is opened on the inner wall of the outer seat, and the stator is installed in the fixing groove. The outer seat is coaxially sleeved on the inner cylinder so that the inner cylinder closes the opening of the fixing groove and uses its internal space as the fluid channel.

7. The axial turbine permanent magnet brushless water pump according to claim 6, characterized in that: The fixing groove is a T-shaped groove, both ends of which extend to the end surfaces at both ends of the outer seat and form ports on the end surfaces; The pump body further includes an annular end cover, two of which are respectively mounted on the end surfaces at both ends of the outer seat, both ends of the inner tube are attached to the corresponding end covers, and the two end covers respectively close the ports at both ends.

8. The axial turbine permanent magnet brushless water pump according to claim 7, characterized in that: The shaft seat is mounted on the end cover, and comprises a shaft sleeve located in the center and a plurality of support rods fixedly connected to the shaft sleeve. The shaft sleeve is sleeved with the rotating shaft, and one end of the support rod away from the shaft sleeve is fixed to the inner wall of the end cover.

9. The axial turbine permanent magnet brushless water pump according to claim 8, characterized in that: The shaft seat is mounted on both end covers.

10. The axial turbine permanent magnet brushless water pump according to claim 7, characterized in that: A limiting ring is coaxially fixedly installed on the end surface of the end cover close to the outer seat. The limiting ring is sleeved on the inner cylinder and attached to the end surface of the outer seat.

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