High-power liquid pump and liquid pump system

Abstract

A high-power liquid pump and a pump system. The liquid pump comprises a stator (1), a rotor (2) located in the center of the stator (1), and a liquid pumping cavity (3) configured to accommodate an impeller (4) on an axial end-side of the rotor (2) to operate therein, wherein a heat dissipation cavity (5) configured to dissipate heat from the stator (1) is formed on the radial outer side of the stator (1); a liquid inlet (51) of the heat dissipation cavity (5) is in communication with a high-pressure area of the liquid pumping cavity (3); a liquid outlet (52) of the heat dissipation cavity (5) is in communication with a low-pressure area of the liquid pumping cavity (3); and the liquid pressure in the high-pressure area is higher than that in the low-pressure area. In the liquid pump, by means of a pressure difference between the high-pressure area and the low-pressure area, some of fluid in the liquid pumping cavity is forced to be divided therefrom to circulate in the heat dissipation cavity, so as to carry out self-circulation heat dissipation.

Description

High power liquid pumps and liquid pump systems

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 21, 2023, with application number 202311229351.5 and invention name “High-power liquid pump and liquid pump system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of liquid pumps, and more particularly, to a high-power liquid pump, and also to a liquid pump system comprising the high-power liquid pump. Background Art

[0003] Liquid pumps can dissipate heat through air or liquid. Currently, there are five main cooling methods. The first involves filling the motor cavity with heat dissipation adhesive, but this significantly increases the weight and cost of the entire pump. The second involves using thermally conductive adhesive and heat sinks, but this method is only suitable for low-power electronic water pumps and cannot meet the heat dissipation requirements of high-power electronic water pumps. The third method involves wet rotor water cooling, but this requires increasing the motor air gap, which increases the motor size and is costly. The rotor bore is small, resulting in poor heat dissipation. Furthermore, the large volume of the hydroelectric spacer requires a large amount of coolant, leading to hydraulic losses and consequently reduced pump performance. The fourth method is a hybrid cooling method, which combines multiple cooling methods, such as thermally conductive adhesive, heat sinks, and air cooling. This hybrid cooling method leverages the advantages of each method to achieve better heat dissipation, but is costly and difficult to manufacture. The fifth method, an external radiator, involves providing a heat dissipation port within the pump that can be connected to an external circulating coolant, transferring heat to a radiator via a pipe. This method is suitable for electronic water pumps of various power ranges and is flexible and convenient, but requires specialized design. In the fifth method mentioned above, since a separate water cooling circulation system needs to be set up, the construction cost is relatively high.

[0004] In summary, how to effectively solve the problem of inconvenient heat dissipation of the motor part of a high-power liquid pump is an issue that currently needs to be urgently addressed by those skilled in the art.

[0005] Summary of the Invention

[0006] In view of this, the first object of the present invention is to provide a high-power liquid pump, which can effectively solve the problem of inconvenient heat dissipation of the motor part of the high-power liquid pump. The second object of the present invention is to provide a liquid pump system including the above-mentioned high-power liquid pump.

[0007] In order to achieve the above first object, the present invention provides the following technical solutions:

[0008] A high-power liquid pump comprises a stator, a rotor located at the center of the stator, and a pump liquid chamber for accommodating an impeller on the axial end side of the rotor. A heat dissipation chamber for dissipating heat from the stator is formed on the radial outer side of the stator. The liquid inlet of the heat dissipation chamber is connected to the high-pressure area of ​​the pump liquid chamber, and the liquid outlet of the heat dissipation chamber is connected to the low-pressure area of ​​the pump liquid chamber. The liquid pressure in the high-pressure area is greater than the liquid pressure in the low-pressure area.

[0009] When the above-mentioned high-power liquid pump is used, when the rotor is working normally, it will drive the impeller to rotate, and the rotation of the impeller will form a high-pressure area and a low-pressure area in the pump liquid chamber, and the liquid inlet of the heat dissipation chamber on the radial outside of the stator is connected to the high-pressure area, and the liquid outlet is connected to the high-pressure area. The pressure difference between the high-pressure area and the low-pressure area forces a part of the fluid in the pump liquid chamber to circulate in the heat dissipation chamber for circulating heat dissipation. The heat extracted from the heat dissipation chamber can be extracted from the liquid outlet of the pump liquid chamber, thereby achieving continuous heat dissipation and meeting the high heat dissipation rate requirements. At the same time, the heat dissipation chamber is set on the outside of the stator to dissipate heat directly from the outside of the stator. Because the stator is the main heat source, it can meet the heat dissipation needs. At the same time, the overall structure is very simple and convenient. In summary, the high-power liquid pump can effectively solve the problem of inconvenient heat dissipation of the motor part of the high-power liquid pump.

[0010] In some embodiments, the pump liquid chamber is arranged at one axial end of the rotor; among the liquid inlet and liquid outlet of the heat dissipation chamber: one is arranged on the side of the heat dissipation chamber close to the pump liquid chamber, and the other is arranged on the side of the heat dissipation chamber away from the pump liquid chamber and is connected to the pump liquid chamber through a guide channel extending along the axial direction.

[0011] In some embodiments, the heat dissipation cavity is an annular cavity surrounding the stator.

[0012] In some embodiments, it includes a main body and a cylindrical shell, the stator is provided in the inner cavity of the main body, a heat dissipation annular groove is opened on the radial outer side of the main body, the cylindrical shell is sleeved on the main body and seals the heat dissipation annular groove, and the groove cavity of the heat dissipation annular groove is the heat dissipation cavity.

[0013] In some embodiments, an axially extending axial conduit section is further included, and the axial conduit section is used to conduct the fluid at one axial end of the heat dissipation annular groove with the fluid in the pump liquid cavity at the other axial end of the heat dissipation annular groove.

[0014] In some embodiments, an L-shaped conduit is included, one section of the L-shaped conduit is the axial conduit section, and the other section of the L-shaped conduit is the radial conduit section; the heat dissipation annular groove has a radially extending hole at one end close to the pump liquid chamber, the radial conduit section is inserted into the radially extending hole, the radial inner end of the radially extending hole is connected to the pump liquid chamber through an axial liquid outlet hole; the liquid outlet of the heat dissipation chamber is formed at the port of the axial conduit section.

[0015] In some embodiments, a pump casing is further included which is arranged on one end of the main body, wherein the pump liquid cavity is formed in the pump casing, and the axial liquid outlet hole and the axial liquid inlet hole connected to the liquid inlet of the heat dissipation cavity are formed on the side of the main body close to the pump liquid cavity; the axial liquid outlet hole is closer to the impeller axis than the axial liquid inlet hole.

[0016] In some embodiments, a guide annular groove is further included and arranged in parallel with the heat dissipation annular groove, an annular gap is formed between the boss between the heat dissipation annular groove and the guide annular groove and the cylindrical shell, the groove bottom of the guide annular groove is provided with the radially extending hole, and the guide annular groove is provided with the axial liquid inlet hole arranged through the bottom of the groove wall near the pump liquid groove.

[0017] In some embodiments, a shaft seal cover is provided at one end of the main body away from the pump liquid cavity to seal the inner cavity of the main body; a cable cover is provided at one end of the main body away from the pump liquid cavity for the insertion of a control cable, and the control cable is used to transmit external control signals to the motor components inside the main body.

[0018] To achieve the second objective, the present invention further provides a liquid pump system comprising any of the aforementioned high-power liquid pumps and a control panel disposed outside the high-power liquid pump. Since the aforementioned high-power liquid pumps have the aforementioned technical effects, a liquid pump system comprising the high-power liquid pump should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] FIG1 is a schematic structural diagram of a high-power liquid pump provided by an embodiment of the present invention;

[0021] FIG2 is a schematic diagram of the AA cross-sectional structure of the high-power liquid pump in FIG1 ;

[0022] FIG3 is a schematic diagram of the main structure of a high-power liquid pump provided by an embodiment of the present invention;

[0023] FIG4 is a schematic structural diagram of the other end of the main body of the high-power liquid pump provided in an embodiment of the present invention.

[0024] The following are marked in the accompanying drawings:

[0025] Stator 1, rotor 2, pump liquid chamber 3, impeller 4, heat dissipation chamber 5, diversion channel 6, main body 7, cylindrical shell 8, L-shaped conduit 9, pump housing 10, diversion annular groove 11, shaft seal cover 12, shaft core 13, axial liquid inlet hole 14, axial liquid outlet hole 15, cable cover 16, liquid inlet 17, liquid outlet 18, heat dissipation annular groove 19, radially extending hole 20;

[0026] Liquid inlet 51, liquid outlet 52;

[0027] Axial duct section 91 and radial duct section 92. DETAILED DESCRIPTION

[0028] The embodiment of the present invention discloses a high-power liquid pump, which effectively solves the problem of inconvenient heat dissipation of the motor part of the high-power liquid pump.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Please refer to Figures 1 to 4, Figure 1 is a schematic structural diagram of the high-power liquid pump provided in an embodiment of the present invention; Figure 2 is a schematic structural diagram of the AA section of the high-power liquid pump in Figure 1; Figure 3 is a schematic structural diagram of the main body of the high-power liquid pump provided in an embodiment of the present invention; Figure 4 is a schematic structural diagram of the other end of the main body of the high-power liquid pump provided in an embodiment of the present invention.

[0031] In some embodiments, this embodiment provides a high-power liquid pump, which specifically includes a stator 1, a rotor 2, an impeller 4 and other structures.

[0032] The rotor 2 is placed in the center of the stator 1, and the rotor 2 can rotate relative to the stator 1. The end side of the rotor 2 in the axial direction is provided with an impeller 4, and torque is transmitted therebetween, that is, the rotation of the rotor 2 drives the impeller 4 to rotate. Generally, the impeller 4 and the rotor 2 are relatively fixed, generally through the shaft core 13 to achieve relative fixation, such as the impeller 4 and the rotor 2 are both fixedly mounted on the shaft core 13. Of course, the rotor 2 and the impeller 4 can also be connected by a transmission mechanism so that when the rotor 2 rotates, the impeller 4 rotates accordingly, wherein the transmission mechanism can be a gear transmission mechanism, a belt transmission mechanism, etc. The end side refers to one side in the axial direction, or it can be both sides in the axial direction.

[0033] The high-power liquid pump is formed with multiple cavities, at least one of which is a pump liquid cavity 3, at least one of which is a heat dissipation cavity 5, and at least one of which is a rotor cavity. The rotor cavity is inside the stator 1 for accommodating the rotor 2.

[0034] The impeller 4 is disposed in the pump liquid chamber 3, and a liquid inlet 17 and a liquid outlet 18 are formed on the pump liquid chamber 3. The impeller 4 rotates to push the liquid at the liquid inlet 17 toward the liquid outlet 18, gradually increasing the pressure in this process. Therefore, high-pressure areas and low-pressure areas appear along this path. Generally speaking, the liquid inlet 17 is disposed at the radial center of the impeller 4, i.e., at the rotating shaft; and the liquid outlet 18 is disposed at the radial outer end of the impeller 4 to output the fluid radially outward. Of course, other possible methods are as follows: a pumping method with an axial liquid inlet 17 and an axial liquid outlet 18; a pumping method with a radial liquid inlet 17 and a radial liquid outlet 18; a pumping method with a radial liquid inlet 17 and an axial liquid outlet 18, etc.

[0035] A heat dissipation cavity 5 for dissipating heat from the stator 1 is formed on the radially outer side of the stator 1, so that the heat from the stator 1 can be transferred from the cavity wall of the heat dissipation cavity 5 to the heat dissipation cavity 5. There is liquid in the heat dissipation cavity 5, so the heat transferred to the heat dissipation cavity 5 will be absorbed by the liquid and flow outward through the liquid, thereby taking the heat out. The specific distribution form of the heat dissipation cavity 5 on the outer side of the stator 1 can be set accordingly according to the heat generated by the stator 1 and the distribution range, so that the heat dissipation meets the requirements. By setting the heat dissipation cavity 5 on the outer side of the stator 1, firstly, the setting is convenient, and secondly, the heat of the stator 1 can be better extracted.

[0036] The liquid inlet 51 of the heat dissipation chamber 5 is connected to the high-pressure region of the pump liquid chamber 3, and the liquid outlet 52 of the heat dissipation chamber 5 is connected to the low-pressure region of the pump liquid chamber 3. The liquid pressure in the high-pressure region is greater than the liquid pressure in the low-pressure region, thereby utilizing the pressure difference created by the pressure zones in the pump liquid chamber 3 to promote fluid exchange within the heat dissipation chamber 5. It should be noted that, generally speaking, the liquid flow rate of the pump liquid chamber 3 is significantly greater than the inlet and outlet flow rates of the heat dissipation chamber 5. Therefore, after the higher-temperature fluid discharged from the heat dissipation chamber 5 enters the low-pressure region, the fluid from the liquid inlet 17 initially mixes with the higher-temperature fluid. This lower-temperature preliminary mixed fluid is substantially the same temperature as the fluid at the liquid inlet 17 and lower than the temperature of the fluid discharged from the heat dissipation chamber 5. Then, under the action of the impeller 4, the mixed fluid enters the high-pressure region, at which point a small portion of the mixed fluid is separated and enters the heat dissipation chamber 5. After absorbing heat in the heat dissipation chamber 5, the higher-temperature fluid flows out of the liquid outlet. The connection can be direct connection or through other channels to form a fluid guide.

[0037] It should be noted that the specific positional relationship between the high-pressure and low-pressure zones can be selected based on the actual structure of the impeller 4 and the pump chamber 3. The distribution relationship between the high-pressure and low-pressure zones corresponds to the layout of the impeller 4. For example, in a pumping configuration with an axial liquid inlet 17 and a radial liquid outlet 18, the area near the axis is the low-pressure zone, while the area away from the axis is the high-pressure zone. In a pumping configuration with a radial liquid inlet 17 and an axial liquid outlet 18, the low-pressure and high-pressure zones are reversed. Generally speaking, the area near the liquid inlet 17 is the low-pressure zone, while the area near the liquid outlet 18 is the high-pressure zone.

[0038] In some embodiments, when the above-mentioned high-power liquid pump is used, when the rotor 2 is operating normally, it will drive the impeller 4 to rotate, and the rotation of the impeller 4 will form a high-pressure area and a low-pressure area in the pump liquid chamber 3, and the liquid inlet of the heat dissipation chamber 5 on the radial outer side of the stator 1 is connected to the high-pressure area, and the liquid outlet is connected to the high-pressure area. The pressure difference between the high-pressure area and the low-pressure area forces a portion of the fluid in the pump liquid chamber 3 to circulate in the heat dissipation chamber 5 for circulating heat dissipation. The heat extracted from the heat dissipation chamber 5 can be extracted from the liquid outlet 18 of the pump liquid chamber 3, thereby achieving continuous heat dissipation and meeting the high heat dissipation rate requirements. At the same time, the heat dissipation chamber 5 is set on the outside of the stator 1 to dissipate heat directly from the outside of the stator 1. Since the stator 1 is the main heat source, it can meet the heat dissipation needs. At the same time, the overall structure is very simple and convenient. In summary, the high-power liquid pump can effectively solve the problem of inconvenient heat dissipation of the motor part of the high-power liquid pump.

[0039] In some embodiments, when the pump liquid chamber 3 is disposed at one axial end of the rotor 2, the liquid inlet and liquid outlet of the heat dissipation chamber 5 can be configured such that: one is disposed on the side of the heat dissipation chamber 5 close to the pump liquid chamber, and the other is disposed on the side of the heat dissipation chamber 5 away from the pump liquid chamber, and both are connected to the pump liquid chamber via an axially extending guide channel 6. The guide channel 6 allows the pump liquid chamber 3 to be disposed at one axial end of the rotor 2, while the fluid in the pump liquid chamber can still flow in through the liquid inlet and then flow axially before flowing out through the liquid outlet, thereby ensuring sufficient heat absorption in the axial direction.

[0040] In some embodiments, the liquid inlet can be arranged on the side of the heat dissipation chamber 5 close to the pump liquid chamber 3, and the liquid outlet can be arranged on the side of the heat dissipation chamber 5 away from the pump liquid chamber 3 and connected to the pump liquid chamber 3 through the axially extending guide channel 6; or the liquid outlet can be arranged on the side of the heat dissipation chamber 5 close to the pump liquid chamber 3, and the liquid inlet can be arranged on the side of the heat dissipation chamber 5 away from the pump liquid chamber 3 and connected to the pump liquid chamber 3 through the axially extending guide channel 6. The specific selection can be made as needed.

[0041] In some embodiments, a pump fluid chamber 3 may be provided at both axial ends of the rotor 2. In this case, the liquid inlet and liquid outlet of the heat dissipation chamber 5 may be connected to the same pump fluid chamber 3. Alternatively, the heat dissipation chamber 5 may be provided with a liquid inlet and a liquid outlet at each axial end of the rotor 2, respectively, to communicate with the pump fluid chamber 3 at both ends. Of course, it is still necessary to pay attention to the pressure comparison between the two connected areas to ensure that one is a high-pressure area and the other is a low-pressure area.

[0042] In some embodiments, the heat dissipation cavity 5 can be an annular cavity surrounding the stator 1 to ensure a larger heat exchange area between the heat dissipation cavity 5 and the stator 1 to improve heat dissipation efficiency. The annular cavity can be a single annular cavity or a spiral annular cavity.

[0043] In some embodiments, the heat dissipation cavity 5 may be an axially extending strip cavity. Specifically, there may be only one strip cavity, or a plurality of circumferentially arranged strip cavities.

[0044] In some embodiments, for better heat dissipation, the axial length of the heat dissipation cavity 5 is as long as possible, for example, it can be consistent with the axial length of the protrusion on the outer side of the stator 1, or the axial length of the heat dissipation cavity 5 can be longer. In the axial direction, the two can be aligned or slightly staggered.

[0045] In some embodiments, a high-power liquid pump may include a main body 7 and a cylindrical shell 8. The stator 1 is disposed in the inner cavity of the main body 7, and a heat dissipation annular groove 19 is formed on the radially outer side of the main body 7. The cylindrical shell is sleeved on the main body 7 and seals the heat dissipation annular groove. The groove cavity of the heat dissipation annular groove serves as a heat dissipation cavity 5. The heat dissipation cavity 5 is simple and convenient to set up, reducing manufacturing costs.

[0046] In some embodiments, of course, a hole structure may be opened in the axial direction of the main body 7 to serve as the heat dissipation cavity 5 .

[0047] In some embodiments, specifically, an axially extending axial conduit segment 91 may be included. The axial conduit segment 91 is used to conduct fluid at one axial end of the heat dissipation annular groove to fluid in the pump fluid chamber 3 at the other axial end of the heat dissipation annular groove. The lumen of the axial conduit segment 91 serves as all or part of the diversion channel 6 to facilitate diversion. Diversion through the axial conduit segment 91 is simpler and more convenient, and can achieve a good diversion effect.

[0048] In some embodiments, holes may be provided on the main body 7 so that the holes form all or part of the diversion channel 6 .

[0049] In some embodiments, an L-shaped conduit 9 can be provided, with one section of the L-shaped conduit 9 being an axial conduit section 91 and the other section being a radial conduit section 92. Thus, the axial conduit section 91 and the radial conduit section 92 are combined to form an L-shaped structure. The heat dissipation annular groove has a radially extending hole 20 at one end near the pump liquid chamber 3. The radial conduit section 92 is inserted into the radially extending hole and is thereby sealedly connected to the radially extending hole. The radially inner end of the radially extending hole is connected to the pump liquid chamber 3 via the axial liquid outlet 15. Axial and radial guidance is achieved through the L-shaped conduit 9, making the structure convenient to set up and easy to install. The insertion of the radial conduit section 92 into the radially extending hole requires minimal precision, and a small amount of fluid passing through the gap between them is permitted, with minimal impact on overall heat dissipation. The end of the axial conduit section 91 can form the outlet of the heat dissipation chamber 5, accommodating the pumping configuration of the axial liquid inlet 17 and radial liquid outlet 18.

[0050] In some embodiments, the axial conduit section 91 may be disposed close to the cylindrical shell so that the cryogenic fluid can be closer to the stator 1 .

[0051] In some embodiments, a pump housing 10 may be further provided that is shrouded at one end of the main body 7. A pump fluid chamber 3 is formed in the pump housing 10. The axial fluid outlet 15 and the axial fluid inlet 14 communicating with the fluid inlet of the heat dissipation chamber 5 are formed on the side of the main body 7 adjacent to the pump fluid chamber 3. The axial fluid outlet 15 is closer to the axis of the impeller 4 than the axial fluid inlet 14. The shrouded pump housing 10 facilitates installation of the pump fluid chamber 3. Furthermore, the shrouded state provides a larger contact area between the pump fluid chamber 3 and the end of the main body 7, allowing the main body 7 to dissipate heat through its end, further improving heat dissipation efficiency.

[0052] In some embodiments, during assembly, the cylindrical shell 8 can be inserted from the side of the main body 7 close to the pump liquid chamber 3 to perform a sealing setting. At the same time, the impeller 4 and other structures are assembled on the core shaft, and then the pump shell 10 is installed to complete the installation.

[0053] In some embodiments, to facilitate the provision of the heat dissipation cavity 5, the diversion channel 6, and the aforementioned liquid inlet and outlet ports on the main body 7, the main body 7 may further include a diversion annular groove 11 arranged in parallel with the heat dissipation annular groove. An annular gap is formed between the shoulder between the heat dissipation annular groove and the diversion annular groove 11 and the cylindrical shell 8, serving as the liquid inlet port for the heat dissipation cavity 5. The bottom of the diversion annular groove 11 is provided with a radially extending hole for mounting the aforementioned L-shaped conduit 9. An axial liquid inlet port 14 is provided through the bottom of the wall of the diversion annular groove 11 near the pump liquid tank. This structure is simple to manufacture, facilitates molding, and reduces costs.

[0054] In order to facilitate the installation of the above-mentioned L-shaped conduit 9, a notch can be formed on the boss to accommodate the above-mentioned axial conduit section 91.

[0055] Specifically, during manufacturing, after forming the above-mentioned heat dissipation annular groove and heat conduction annular groove on the outer side of the main body 7, a radially extending hole can be formed at the bottom of the heat conduction annular groove, and the above-mentioned axial liquid inlet hole 14 can be opened at one end of the main body 7 close to the pump liquid chamber 3, passing through to the heat conduction annular groove, and an axial liquid outlet hole 15 can be opened to pass through to the radially extending hole.

[0056] In some embodiments, the pump housing 10 can be sleeved on the main body 7 with a sealing ring provided therebetween and fixed by screws.

[0057] In some embodiments, a shaft sealing cover 12 may be provided at one end of the main body 7 away from the pump liquid chamber 3 to seal the inner cavity of the main body 7 .

[0058] In some embodiments, a cable cover 16 may be provided on the end of the main body 7 away from the pump fluid chamber 3 for inserting a control cable, which is used to transmit external control signals to the motor components inside the main body 7. This allows the control board to be placed outside the main body 7, facilitating separate heat dissipation and maintenance.

[0059] In some embodiments, when a shaft core is provided, one end of the shaft core may be supported by a shaft seal cover 12 with a bearing disposed therebetween. The other end passes through a through hole in the main body 7, exiting outside the main body 7 and into the pump fluid chamber 3 for mounting the impeller 4, which is provided with guide vanes (IGVs). A bearing is also disposed between the shaft core and the main body 7, with dynamic and static seals disposed therebetween. Specifically, the static and dynamic seals may be disposed within the pump fluid chamber 3. A seal is also required between the main body 7 and the shaft seal cover 12, which may be embedded within the main body 7.

[0060] Based on the high-power liquid pumps provided in the above embodiments, the present invention further provides a liquid pump system, which includes any one of the high-power liquid pumps in the above embodiments. Since the liquid pump system uses the high-power liquid pumps in the above embodiments, the beneficial effects of the liquid pump system can be seen in the above embodiments.

[0061] 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.

[0062] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-power liquid pump, comprising a stator, a rotor located at the center of the stator, and a pump liquid chamber for accommodating an impeller at the axial end of the rotor, characterized in that: A heat dissipation cavity for dissipating heat from the stator is formed on the radial outer side of the stator, a liquid inlet of the heat dissipation cavity is connected to a high-pressure area of ​​the pump liquid cavity, a liquid outlet of the heat dissipation cavity is connected to a low-pressure area of ​​the pump liquid cavity, and a liquid pressure in the high-pressure area is greater than a liquid pressure in the low-pressure area.

2. The high-power liquid pump according to claim 1, characterized in that: The pump liquid chamber is arranged at one axial end of the rotor; among the liquid inlet and the liquid outlet of the heat dissipation chamber: one is arranged on a side of the heat dissipation chamber close to the pump liquid chamber, and the other is arranged on a side of the heat dissipation chamber away from the pump liquid chamber and is connected to the pump liquid chamber through a guide channel extending along the axial direction.

3. The high-power liquid pump according to claim 2, characterized in that: The heat dissipation cavity is an annular cavity surrounding the stator.

4. The high-power liquid pump according to claim 2, characterized in that: It comprises a main body and a cylindrical shell, wherein the stator is arranged in the inner cavity of the main body, a heat dissipation annular groove is opened on the radial outer side of the main body, the cylindrical shell is sleeved on the main body and seals the heat dissipation annular groove, and the groove cavity of the heat dissipation annular groove is the heat dissipation cavity.

5. The high-power liquid pump according to claim 4, characterized in that: It also includes an axially extending axial conduit section, which is used to conduct the fluid at one axial end of the heat dissipation annular groove with the fluid in the pump liquid cavity at the other axial end of the heat dissipation annular groove.

6. The high-power liquid pump according to claim 5, characterized in that: It comprises an L-shaped conduit, one section of the L-shaped conduit is the axial conduit section, and the other section of the L-shaped conduit is the radial conduit section; the heat dissipation annular groove has a radially extending hole at one end close to the pump liquid chamber, the radial conduit section is inserted into the radially extending hole, the radial inner end of the radially extending hole is connected to the pump liquid chamber through an axial liquid outlet hole; the liquid outlet of the heat dissipation chamber is formed at the port of the axial conduit section.

7. The high-power liquid pump according to claim 6, characterized in that: It also includes a pump shell which is covered and arranged at one end of the main body, the pump liquid cavity is formed in the pump shell, the axial liquid outlet hole and the axial liquid inlet hole connected to the liquid inlet of the heat dissipation cavity are formed on the side of the main body close to the pump liquid cavity; the axial liquid outlet hole is closer to the axis of the impeller than the axial liquid inlet hole.

8. The high-power liquid pump according to claim 7, characterized in that: It also includes a guide annular groove arranged in parallel with the heat dissipation annular groove, an annular gap is formed between the boss between the heat dissipation annular groove and the guide annular groove and the cylinder shell, the groove bottom of the guide annular groove is provided with the radially extending hole, and the bottom of the groove wall of the guide annular groove close to the pump liquid groove is provided with the axial liquid inlet hole arranged through it.

9. The high-power liquid pump according to any one of claims 4 to 8, characterized in that: A shaft seal cover is provided at one end of the main body away from the pump fluid cavity to seal the inner cavity of the main body; a cable cover is provided at one end of the main body away from the pump fluid cavity to allow a control cable to pass through, and the control cable is used to transmit external control signals to the motor components inside the main body.

10. A liquid pump system, characterized in that: It comprises the high-power liquid pump as described in any one of claims 1 to 9, and also comprises a control board arranged on the outside of the high-power liquid pump.

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