Water pump

Abstract

The invention discloses a water pump, and relates to the technical field of rotary fluid machinery such as pumps, fans and compressors. The water pump comprises a pump body, and the pump body comprises a pump shell, a driving assembly and a water pumping assembly; a rotor cavity and a water pumping cavity are sequentially formed in the pump shell in the axial direction, the driving assembly comprises a rotor assembly arranged in the rotor cavity, the water pumping assembly is arranged in the water pumping cavity, the rotor assembly is connected with the water pumping assembly, an inlet of the rotor cavity is connected to the outer end of the water pumping cavity in the radial direction, and an outlet of the rotor cavity is connected to the inner end of the water pumping cavity in the radial direction. The pump shell is provided with a water inlet channel opposite to the radial middle of the water pumping cavity and a water outlet channel opposite to the radial outer end of the water pumping cavity. According to the water pump, cooling substances such as heat dissipation glue do not need to be additionally and independently arranged, the driving assembly is directly subjected to water cooling by means of liquid introduced from the water pumping assembly, liquid in the rotor cavity is directly driven to flow by means of available pressure drop caused by vortex motion of the water pumping assembly, an external power source is not needed to drive water flow for cooling, and the cost can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary fluid machinery such as pumps, fans, compressors, etc., and in particular to a water pump. Background Art

[0002] As a rotating machine, the water pump uses the interaction between the installation angle on the circumference of the impeller and the volute to convert electrical energy into mechanical energy and compress and transport the working fluid. However, the water pump itself will also generate heat, which needs to be dissipated and cooled.

[0003] An existing method for cooling water pumps is to inject heat dissipation glue into the motor cavity, but this will greatly increase the weight of the entire water pump and increase the cost.

[0004] Therefore, how to reduce the cost is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a water pump which can reduce cooling costs.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A water pump comprises a pump body, wherein the pump body comprises a pump casing, a drive assembly and a water pumping assembly; a rotor cavity and a water pumping cavity are sequentially arranged in the axial direction in the pump casing, the drive assembly comprises a rotor assembly arranged in the rotor cavity, the water pumping assembly is arranged in the water pumping cavity, the rotor assembly is connected to the water pumping assembly, the inlet of the rotor cavity is connected to the radial outer end of the water pumping cavity and the outlet is connected to the radial inner end of the water pumping cavity, and a water inlet channel opposite to the radial middle part of the water pumping cavity and a water outlet channel opposite to the radial outer end of the water pumping cavity are provided on the pump casing.

[0008] Preferably, a cooling volute is provided in the pump casing, the rotor cavity is located on the inner side of the cooling volute, and a heat dissipation cavity is formed between the radial outer side of the cooling volute and the pump casing; the radial outer end of the pump water cavity, the heat dissipation cavity, the rotor cavity and the radial inner end of the pump water cavity are connected in sequence.

[0009] Preferably, the drive assembly also includes a stator assembly sleeved on the outside of the rotor assembly; a rotor sleeve is inserted and fixed in the cooling volute, and a sealed stator cavity is formed between the rotor sleeve and the cooling volute to accommodate the stator assembly, and the rotor cavity is located inside the rotor sleeve.

[0010] Preferably, the rotor sleeve includes a cylinder body and a sleeve cover plate fixed to one end of the cylinder body axially close to the pump water chamber; the portion of the sleeve cover plate radially located outside the cylinder body seals an axial end of the stator chamber; the portion of the sleeve cover plate radially located inside the cylinder body is penetrated by the cover plate channel to serve as an outlet of the rotor chamber.

[0011] Preferably, the end of the cooling volute axially away from the pump water chamber is an end plate, the rotor sleeve is sealed and connected to the middle part of the end plate, an end plate channel is provided on the end plate at a portion radially located inside the rotor sleeve, and a volute channel connecting the heat dissipation chamber and the end plate channel is provided on the cooling volute; the heat dissipation chamber is connected to the rotor chamber via the volute channel and the end plate channel in sequence.

[0012] Preferably, a positioning groove is provided in the outer surface of the cooling volute, on the end face axially away from the pump water chamber, and a pin is fixedly provided in the positioning groove. The pin extends radially relative to the outer peripheral surface of the cooling volute and is plugged and fixed to the pump casing.

[0013] Preferably, the pump body further comprises an axis core, and the rotor assembly is connected via the axis core to drive the water pump assembly; an axis core channel is provided on the axis core, and the water pump cavity, the axis core channel, and the inlet of the rotor cavity are connected in sequence.

[0014] Preferably, it also includes a sealing plate sealed and fixed to the cooling volute, a transition cavity is formed between the sealing plate and the cooling volute, and the outlet of the heat dissipation cavity, the transition cavity, the shaft core channel, and the inlet of the rotor cavity are connected in sequence.

[0015] Preferably, a cooling channel is arranged inside the shaft core, and a cooling groove is arranged on the outer circumferential surface of the shaft core, one opening of the cooling channel is arranged on the end surface of the shaft core axially away from the pump water chamber, and the other opening is arranged on the cooling groove, so that the cooling channel is connected with the cooling groove to form the shaft core channel.

[0016] Preferably, it also includes a control box which is separately arranged from the pump body; a cable connector is arranged on the pump housing, the lead wire of the drive assembly is sealed and connected to the cable connector, and after extending out of the pump body through the cable connector, it is electrically connected to the control box.

[0017] The water pump provided by the present invention comprises a pump body, which comprises a pump casing, a driving assembly and a water pumping assembly; a rotor cavity and a water pumping cavity are sequentially arranged in the axial direction in the pump casing, the driving assembly comprises a rotor assembly arranged in the rotor cavity, the water pumping assembly is arranged in the water pumping cavity, the rotor assembly is connected to the water pumping assembly, the inlet of the rotor cavity is connected to the radial outer end of the water pumping cavity and the outlet is connected to the radial inner end of the water pumping cavity, and a water inlet channel opposite to the radial middle part of the water pumping cavity and a water outlet channel opposite to the radial outer end of the water pumping cavity are provided on the pump casing.

[0018] The water pump does not need to separately add cooling materials such as heat dissipation glue. The driving component is directly cooled by the liquid introduced from the pump water component, and the liquid flow in the rotor cavity is directly driven by the available pressure drop caused by the eddy current motion of the pump water component. There is no need for an external power source to drive the cooling water flow, which can effectively reduce costs. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 This is a first-view appearance diagram of a pump body in a specific embodiment 1 of the water pump provided by the present invention;

[0021] Figure 2 This is a second perspective appearance diagram of the pump body in the specific embodiment 1 of the water pump provided by the present invention;

[0022] Figure 3 A front view of a pump body in a specific embodiment 1 of a water pump provided by the present invention;

[0023] Figure 4 for Figure 3 AA section view;

[0024] Figure 5 for Figure 4 BB cross-sectional view;

[0025] Figure 6 for Figure 1 Structural diagram of the middle pump casing;

[0026] Figure 7 for Figure 1 The first-person view of the middle pump body after the pump casing is hidden;

[0027] Figure 8 for Figure 1 The second perspective appearance of the middle pump body after the pump casing is hidden;

[0028] Fig. 9 for Figure 1 The main view of the middle pump body with the pump casing hidden;

[0029] Fig.10 for Figure 1 The appearance of the middle pump body after the pump casing and impeller assembly are hidden;

[0030] Fig.11 for Figure 1 Transfer diagram inside the mid-cooling volute;

[0031] Fig.12 for Figure 1 Assembly drawing of the middle rotor sleeve and cooling volute;

[0032] Fig.13 for Figure 1 First-person view of the middle cooling volute;

[0033] Fig.14 for Figure 1 The second perspective appearance of the middle cooling volute;

[0034] Fig.15 for Figure 1 First-person view of the middle rotor sleeve;

[0035] Fig.16 for Figure 1 The second perspective appearance of the middle rotor sleeve;

[0036] Fig.17 for Figure 1 Side view of the middle rotor sleeve;

[0037] Fig.18 for Figure 1 Assembly drawing of the middle rotor sleeve and drive assembly;

[0038] Fig.19 for Figure 1 Appearance diagram of the middle shaft core;

[0039] Fig. 20 for Fig.19 C-direction view.

[0040] Reference numerals:

[0041] Cable connector 1;

[0042] Cooling volute 2, volute sealing ring 21, volute sealing gasket 22, end plate 23, end plate channel 24, volute channel 25, positioning groove 26, sealing groove 27, stator fixing groove 28;

[0043] Sealing plate 3;

[0044] Pump housing 4, water inlet channel 41, water outlet channel 42, pin 43;

[0045] Pump water assembly 5, impeller 51, IGV 52, IGV support ring 53, impeller support ring 54;

[0046] Rotor sleeve 6, sleeve sealing gasket 61, bearing 62, stud 63, sleeve sealing ring 64, sleeve cover plate 65, cover plate channel 66, cylinder 67;

[0047] Stator assembly 7;

[0048] Rotor assembly 8;

[0049] Static guide ring 9;

[0050] Pump water chamber 10;

[0051] Stator cavity 11;

[0052] Heat dissipation cavity 12;

[0053] Rotor chamber 13;

[0054] Axis core 14, shaft core channel 141, cooling channel 142, cooling groove 143, screw 144, impeller fixing groove 145, rotor fixing groove 146;

[0055] Transition chamber 15;

[0056] External circulation pump water path 16;

[0057] Internal circulation liquid cooling heat dissipation path 17. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0059] The core of the present invention is to provide a water pump which can reduce the cost of cooling.

[0060] For a specific embodiment of the water pump provided by the present invention, please refer to Figures 1 to 20 , including a pump body. The pump body includes a pump casing 4, a drive component and a water pumping component 5.

[0061] The pump housing 4 is provided with a rotor cavity 13 and a water pump cavity 10 in sequence along the axial direction. The driving assembly includes a rotor assembly 8 arranged in the rotor cavity 13, and a water pump cavity 5 is arranged in the water pump cavity 10, and the rotor assembly 8 is connected to the water pump cavity 5. The pump housing 4 is provided with a water inlet channel 41 opposite to the radial middle of the water pump cavity 10 and a water outlet channel 42 opposite to the radial outer end of the water pump cavity 10. Optionally, the water inlet channel 41 is provided on the axial end face of the pump housing 4 close to the water pump cavity 10, and the water outlet channel 42 is provided on the peripheral surface of the pump housing 4.

[0062] Among them, the driving component is used to drive the water pump component 5 to rotate. The water pump component 5 is used to pump the circulating hot fluid, including an impeller 51 and an IGV 52 (inlet guide vane). The water pump cavity 10 can also be provided with an IGV support ring 53, an impeller support ring 54 and other components to assist in connecting the water pump component 5 to the pump housing 4. When the water pump component 5 rotates, the liquid outside the pump body 4 can be sucked into the water pump cavity 10 of the pump body 4 through the water inlet channel 41, and then discharged through the water outlet channel 42. The liquid transported by the pump body is not limited to water, but can also be other liquids.

[0063] The inlet of the rotor cavity 13 is connected to the radial outer end of the pump cavity 10 and the outlet is connected to the radial inner end of the pump cavity 10, so the liquid in the rotor cavity 13 can be driven to flow directly by the pressure difference of the pump cavity 10. The specific principle is as follows Figure 5 As shown, the rotational motion of the water pump assembly 5 generates water flow, so that the portion radially close to the center line of the water pump assembly 5 is subjected to a smaller water pressure, and the area close to the outer diameter of the water pump assembly 5 is affected by the water pressure of the high-pressure turbulent area, resulting in a radial pressure difference of higher outside and lower inside. Accordingly, the pressure of the portion of the rotor cavity 13 that is connected to the radial outer end of the water pump cavity 10 is greater than that of the portion that is connected to the radial inner end of the water pump cavity 10. The existence of the pressure difference forces water to flow in the rotor cavity 13, so as to cool the drive assembly with the help of the water flow.

[0064] In the present embodiment, there is no need to separately provide cooling materials such as heat dissipation glue. The driving component can be directly water-cooled with the help of the liquid introduced from the water pump component 5. The available pressure drop caused by the eddy current motion of the water pump component 5 can be used to directly drive the flow of liquid in the rotor cavity 13. There is no need for an external power source to drive the cooling water flow, which can effectively reduce costs.

[0065] Furthermore, if Figure 4 As shown, a cooling volute 2 is arranged in the pump housing 4, and a rotor cavity 13 is located inside the cooling volute 2, and a heat dissipation cavity 12 is formed between the radially outer side of the cooling volute 2 and the pump housing 4. The radially outer end of the pump water cavity 10, the heat dissipation cavity 12, the rotor cavity 13 and the radially inner end of the pump water cavity 10 are sequentially connected.

[0066] When the driving assembly is running and the water pump assembly 5 is driven to rotate, as Figure 4The arrow indicates the external circulation water pumping path 16. Liquid outside the pump housing 4 can enter through the water inlet channel 41. After passing through the water pumping chamber 10, part of the liquid can be discharged through the water outlet channel 42. The water pumping assembly 5 draws liquid from the water inlet channel 41 to the water pumping chamber 10. After passing through the water pumping chamber 10, part of the liquid can be discharged through the water outlet channel 42, thereby achieving external circulation water pumping performance. In addition, after passing through the water pumping chamber 10, part of the liquid can be forced to flow out of the water pumping chamber 10 under the pressure difference of the water pumping chamber 10. At least part of the liquid flows out of the water pumping chamber 10 through the heat dissipation chamber 12 into the rotor chamber 13 to cool the drive assembly, and then flows back to the water pumping chamber 10 through the rotor chamber 13 to form a Figure 4 The inner circulation liquid cooling heat dissipation path 17 is shown by the arrow.

[0067] In this embodiment, the heat dissipation cavity 12 is added so that the liquid in the pump water cavity 10 can enter the rotor cavity 13 through the heat dissipation cavity 12, thereby extending the service life of the structure. Of course, in other embodiments, the rotor cavity 13 and the pump water cavity 10 can be connected through an additional hose.

[0068] Furthermore, if Figure 4 and Fig.12 As shown, the driving assembly also includes a stator assembly 7 sleeved on the outside of the rotor assembly 8. The stator assembly 7 includes a waterproof and dustproof motor winding, which is used to drive the rotor assembly 8 to convert electrical energy into mechanical energy to provide power for the water pump assembly 5.

[0069] The cooling volute 2 is inserted and fixed with a rotor sleeve 6. The rotor cavity 13 is located inside the rotor sleeve 6 to accommodate the rotor assembly 8. A sealed stator cavity 11 is formed between the rotor sleeve 6 and the cooling volute 2 to accommodate the stator assembly 7. The stator assembly 7 installed in the stator cavity 11 needs to be water-electrically isolated and waterproof and dust-proof sealed. By adding the rotor sleeve 6, the assembly and formation of the stator cavity 11 are facilitated, and the structure is simple.

[0070] Among them, preferably, the materials selected for the cooling volute 2 and the rotor sleeve 6 have the characteristics of high thermal conductivity, corrosion resistance, and rust resistance, such as aluminum alloy and other materials, which can not only improve the heat dissipation efficiency, but also help to reduce weight and control costs.

[0071] In this embodiment, the pump body includes four composite chambers, namely, a pump water chamber 10, a heat dissipation chamber 12, a stator chamber 11 and a rotor chamber 13. The heat dissipation chamber 12, the pump water chamber 10 and the rotor chamber 13 form an internal circulation liquid cooling heat dissipation path 17. During operation, the pressure difference generated by the pump water assembly 5 in the pump water chamber 10 is used to make the fluid circulate efficiently. Since the heat dissipation chamber 12 and the rotor chamber 13 are equivalent to wrapping the stator chamber 11, the liquid can effectively take away the heat of the rotor chamber 13 and the stator chamber 11 during the flow process, thereby achieving heat dissipation of the high-power water pump.

[0072] Furthermore, if Figure 4 and Fig.12 As shown, the rotor sleeve 6 includes a cylinder 67 and a sleeve cover plate 65 fixed to one end of the cylinder 67 close to the pump water chamber 10 in the axial direction. Fig.15 As shown, the cylinder body 67 and the sleeve cover plate 65 are generally in a T-shaped structure.

[0073] The sleeve cover plate 65 partially seals one axial end of the stator cavity 11 outside the cylinder 67 in the radial direction, specifically sealing the axial end of the stator cavity 11 close to the pump water cavity 10. The sleeve cover plate 65 and the cooling volute 2 can be sealed by the sleeve sealing ring 64, and the cylinder 67 and the cooling volute 2 can be sealed by the sleeve sealing gasket 61. The sleeve sealing gasket 61 and the sleeve sealing ring 64 can be screwed to the cooling volute 2. The sealing structure is simple, achieving better sealing performance and a more convenient manufacturing method, which can save manufacturing costs.

[0074] The cover plate channel 66 is provided through the portion of the sleeve cover plate 65 located radially inside the cylinder 67 to serve as the outlet of the rotor cavity 13, and the liquid in the rotor cavity 13 enters the pump water cavity 10 through the cover plate channel 66. In other words, the rotor cavity 13 is connected to the radial inner end of the pump water cavity 10 through the cover plate channel 66. Preferably, a plurality of cover plate channels 66 are evenly arranged in the circumferential direction around the rotation center line of the rotor assembly 8 to ensure the drainage efficiency.

[0075] In this embodiment, a cover plate through hole 66 is provided on the sleeve cover plate 65 as the outlet of the rotor cavity 13, which can facilitate accurate definition of the outlet position of the rotor cavity 13 and ensure that it is docked with the radial inner end of the pump water cavity 10, thereby reducing the processing difficulty.

[0076] Of course, in other embodiments, the rotor sleeve 6 and the separate stator cavity 11 may not be provided, and a waterproof layer or a waterproof structure may be achieved by providing the stator assembly 7 .

[0077] Furthermore, if Figure 1 and Figure 8 As shown, a positioning groove 26 is provided in the outer surface of the cooling volute 2, on the end surface away from the pump water chamber 10 in the axial direction, and a pin piece 43 is fixedly provided in the positioning groove 26. The pin piece 43 extends radially relative to the outer peripheral surface of the cooling volute 2 and is plugged and fixed to the pump housing 4. Specifically, two positioning grooves 26 are relatively provided on the cooling volute 2, corresponding to the pin piece 43 on the pump housing 4 and fixedly locked. Of course, in other embodiments, more positioning grooves 26 may also be provided.

[0078] In this embodiment, by selecting the length of the pin piece 43, setting the size of the positioning groove 26, and setting the insertion depth of the pin piece 43 and the pump casing 4, the radial gap between the cooling volute 2 and the pump casing 4 can be correspondingly limited to ensure the existence of the heat dissipation cavity 12, and the structure near the water outlet channel 42 in the pump casing 4 can be prevented from blocking the water outlet channel 42, such as the structure where the water pump assembly 5 is integrated in the cooling volute 2. In addition, the positioning groove and the pin piece 43 can accurately define the assembly position of the pump casing 4 and the cooling volute 2, facilitating the fixation and sealing between the pump casing 4 and the cooling volute 2.

[0079] Furthermore, if Figure 4 , Figure 8 and Fig.13 As shown, the end of the cooling volute 2 away from the pump water chamber 10 in the axial direction is an end plate 23. Figure 4 As shown, the end plate 23 is sealed and connected to the pump casing 4 through the volute sealing ring 21. The volute sealing ring 21 mainly prevents leakage of the heat dissipation cavity 12. The heat dissipation cavity 12 can be formed between the pump casing 4, the volute sealing ring 21, and the cooling volute 2.

[0080] In addition, the rotor sleeve 6 is sealed and connected to the middle of the end plate 23. Specifically, one end of the rotor sleeve 6 that is axially away from the pump water chamber 10 is sealed and inserted into the sealing groove 27 on the end plate 23. The end plate 23 is provided with an end plate channel 24 in the radial direction on the inner side of the rotor sleeve 6, and the cooling volute 2 is provided with a volute channel 25 that connects the heat dissipation chamber 12 and the end plate channel 24. The heat dissipation chamber 12 is connected to the rotor chamber 13 through the volute channel 25 and the end plate channel 24 in sequence, and accordingly, the liquid in the heat dissipation chamber 12 can enter the rotor chamber 13 through the volute channel 25 and the end plate channel 24 in sequence.

[0081] In this embodiment, by adaptively opening a channel on the cooling volute 2 , the stator cavity 11 can be bypassed and the liquid in the heat dissipation cavity 12 can be accurately introduced into the rotor cavity 13 .

[0082] Furthermore, if Figure 4 , Fig.19 and Fig. 20 As shown, the pump body also includes a shaft core 14, and the rotor assembly 8 and the water pump assembly 5 are both fixedly connected to the shaft core 14. The rotor assembly 8 drives the shaft core 14 to rotate, and the shaft core 14 drives the water pump assembly 5 to rotate. Specifically, the shaft core 14 penetrates the rotor sleeve 6 to extend into the rotor cavity 13 and the water pump cavity 10 respectively, and the impeller fixing groove 145 and the rotor fixing groove 146 are respectively provided on the shaft core 14 to fix the water pump assembly and the rotor assembly respectively. Preferably, the shaft core 14 is connected to the rotor sleeve 6 through a bearing 62, which can effectively reduce the occurrence of NVH noise, vibration and acoustic roughness, wear and other problems.

[0083] The shaft core 14 is provided with a shaft core channel 141, and the pump water chamber 10, the shaft core channel 141, and the inlet of the rotor chamber 13 are sequentially connected. Accordingly, the liquid in the pump water chamber 10 can enter the rotor chamber 13 through the volute channel 25 and the shaft core channel 141 in sequence.

[0084] In this embodiment, by utilizing the space of the shaft core 14 and directly cooling the rotor assembly 8 on the inner side of the rotor assembly 8, a large area of ​​heat exchange is achieved, thereby improving the heat dissipation and cooling efficiency of the rotor cavity 13. During operation, the cooling volute 2 and the shaft core 14 are combined, and the heat dissipation cavity 12, the shaft core channel 141, the rotor cavity 13, and the pump water cavity 10 form a closed-loop composite internal circulation liquid cooling heat dissipation path 17 for cooling the drive assembly. With the help of the pressure difference generated by the pump water assembly 5 in the pump water cavity 10, the hot fluid circulates efficiently, thereby effectively taking away the heat of the rotor cavity 13 and achieving heat dissipation of the high-power water pump.

[0085] Furthermore, if Figure 8 As shown, the water pump further includes a sealing plate 3 sealed and fixed to the cooling volute 2, which can be fixed to the end plate 23 by screws. A transition chamber 15 is formed between the sealing plate 3 and the end plate 23, and the transition chamber 15 and the rotor chamber 13 are axially located on both sides of the end plate 23. The outlet of the heat dissipation chamber 12, the transition chamber 15, the shaft core channel 141, and the inlet of the rotor chamber 13 are connected in sequence.

[0086] That is to say, in this embodiment, the outlet of the volute passage 25 has two branches, one of which directly connects to the rotor cavity 13 ( Figure 4 The liquid flows to the right at the outlet of the middle volute passage 25), and the other enters the transition chamber 15 ( Figure 4 The liquid flows to the left at the outlet of the middle volute passage 25 ), and then enters the rotor cavity 13 through the shaft core passage 141 , which can ensure the cooling efficiency of the rotor cavity 13 and can start cooling from different positions of the rotor assembly 8 .

[0087] Of course, in other embodiments, the transition chamber 15 may not be provided; or, the end plate channel 24 may not be directly connected to the rotor chamber 13 , and can only enter the rotor chamber 13 through the transition chamber 15 and the shaft core channel 141 .

[0088] Furthermore, if Figure 4 , Fig.19 and Fig. 20As shown, a cooling channel 142 is provided inside the shaft core 14, and can be specifically provided at one end of the shaft core 14 away from the pump water chamber 10. A cooling groove 143 is provided on the outer peripheral surface of the shaft core 14, and optionally, a plurality of cooling grooves 143 are evenly arranged on the outer peripheral surface of the shaft core 14 along the circumferential direction to ensure cooling efficiency. Among them, one opening of the cooling channel 142 is provided on the end surface of the shaft core 14 away from the pump water chamber 10 in the axial direction, and the other opening is provided on the cooling groove 143, so that the cooling channel 142 is connected with the cooling groove 143 to form a shaft core channel 141.

[0089] After the rotor assembly 8 is connected to the shaft core 14, the liquid in the cooling channel 142 can smoothly enter the rotor cavity 13 through the portion of the cooling groove 143 not covered by the rotor assembly 8, and the portion covered by the rotor assembly 8 can also provide liquid to directly cool the rotor assembly 8, thereby improving the cooling efficiency.

[0090] Furthermore, if Figure 4 and Fig.13 As shown, the volute channel 25 is arranged at the end of the cooling volute 2 axially away from the pump water chamber 10, which can ensure that the liquid can flow from the pump water chamber 10 to the end away from the pump water chamber 10 in the heat dissipation chamber 12, and after entering the rotor chamber 13 through the volute channel 25, it flows toward the pump water chamber 10 from the end away from the pump water chamber 10 in the rotor chamber 13, thereby ensuring the comprehensiveness and cooling effect of the cooling.

[0091] Furthermore, the water pump also includes a control box which is externally arranged on the pump body and is separately arranged from the pump body, and the pump body and the control box are not directly fixed as one. A cable connector 1 is arranged on the pump housing 4, specifically a sealed waterproof and dustproof connector, and the cable connector 1 can be locked on the cooling volute 2 by screws 144. The lead wire of the drive assembly is sealed and connected to the cable connector 1, and after extending out of the pump body through the cable connector 1, it is electrically connected to the control box. Preferably, the lead wire of the motor winding in the stator assembly 7 is welded and then led out to the control box through the cable connector 1. The motor winding and the lead wire are welded to improve the transfer strength.

[0092] In addition, the internal design of the control box can choose to use an asynchronous motor circuit connection or a permanent magnet synchronous motor control board. At the same time, in the control box, the control board can also be centrally cooled in the control box, or a separate setting method can be used, such as at the wind source or immersion cooling.

[0093] In this embodiment, the control box and the pump body are set up in a split type, and the two can be installed independently, which can improve the performance and maintenance efficiency of the pump, provide a flexible combination installation method, and be suitable for various occasions and reduce costs. The pump body can be smaller in size and have a higher IP protection level. Since the control box and the pump body can be placed in different positions according to their respective installation requirements, it is convenient to further expand its application field.

[0094] The working process of the water pump in this embodiment includes: the control box controls the stator assembly 7 to form a magnetic field, thereby driving the rotor assembly 8 to rotate, and the water pump assembly 5 then starts to absorb the liquid outside the pump housing 4 from the water inlet channel 41 and sends it to the water outlet channel 42, so as to achieve the following Figure 4 The outer circulation pump water path 16 shown;

[0095] During the rotation of the water pump assembly 5, Figure 5 As shown, the water pressure near the center line of the impeller 51 is relatively small, while the area near the outer diameter of the impeller 51 and the IGV 52 is affected by the water pressure of the high-pressure turbulent area, resulting in a pressure difference. Accordingly, the inner diameter of the outlet position is set on the rotor chamber 13. Smaller than the outer diameter of the inlet position of the heat dissipation cavity 12 There is a pressure difference ΔP between the inlet of the heat dissipation cavity 12 and the outlet of the rotor cavity 13, which forces the liquid to flow in the heat dissipation cavity 12, the shaft core channel 141, and the rotor cavity 13. In the process of the liquid flowing from the high-pressure water inlet G to the low-pressure water discharge D, the heat of the stator cavity 11 and the rotor cavity 13 can be taken away efficiently and stably.

[0096] The water pump in this embodiment has the following advantages: the split design of the control box and the pump body can effectively reduce the volume of the pump body, reduce costs, reduce pipeline impedance, and optimize work efficiency, thereby achieving more economical and efficient, more flexible, more stable and reliable, and more environmentally friendly goals, improving the performance and maintenance efficiency of the pump, and further expanding its application field, suitable for various occasions, and providing a flexible combination installation method, which can achieve a smaller water pump and a higher IP protection level; the pump body has a simple and compact structure and a smaller volume, which can save pump body installation space and facilitate layout and installation; the pump body contains multiple chambers, which can effectively separate components with different functions and improve the operating efficiency and reliability of the entire system; the internal design of the pump body is reasonable, which is conducive to heat dissipation, thereby effectively reducing temperature and improving efficiency; the pump body has good sealing performance and is not easy to leak, thereby increasing service life and customer satisfaction; the pump body has a relatively low manufacturing cost, is easy to maintain and maintain, and has low labor and material costs.

[0097] The water pump in this embodiment belongs to the fields of aerospace technology, electronic information technology, transportation equipment manufacturing, new energy and rail transit air conditioning, central temperature control, energy storage temperature control, liquid cooling and electronic heat dissipation, cabinet air conditioning, data center integration, cold chain temperature control, and indoor air environment control. It is widely used in data centers, energy storage power stations, communications, smart grids, cold chain transportation, new energy vehicles, automobiles, rail transit, home furnishings, medical care and other industries.

[0098] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", "multiple groups" mean two or more.

[0099] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0100] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0101] 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.

[0102] The water pump provided by the present invention is introduced in detail above. The principle and implementation mode of the present invention are described in this article by using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A water pump, characterized in that: The invention comprises a pump body, wherein the pump body comprises a pump casing (4), a driving assembly and a water pumping assembly (5); a rotor chamber (13) and a water pumping chamber (10) are sequentially arranged in the axial direction in the pump casing (4); the driving assembly comprises a rotor assembly (8) arranged in the rotor chamber (13); the water pumping chamber (5) is arranged in the water pumping chamber (10); the rotor assembly (8) is connected to the water pumping assembly (5); the inlet of the rotor chamber (13) is connected to the radial outer end of the water pumping chamber (10) and the outlet is connected to the radial inner end of the water pumping chamber (10); the pump casing (4) is provided with a water inlet channel (41) opposite to the radial middle part of the water pumping chamber (10) and a water outlet channel (42) opposite to the radial outer end of the water pumping chamber (10).

2. The water pump according to claim 1, characterized in that: A cooling volute (2) is arranged inside the pump housing (4); the rotor cavity (13) is located inside the cooling volute (2); a heat dissipation cavity (12) is formed between the radially outer side of the cooling volute (2) and the pump housing (4); the radially outer end of the pump water cavity (10), the heat dissipation cavity (12), the rotor cavity (13) and the radially inner end of the pump water cavity (10) are sequentially connected.

3. The water pump according to claim 2, characterized in that: The drive assembly also includes a stator assembly (7) sleeved on the outside of the rotor assembly (8); a rotor sleeve (6) is inserted and fixed in the cooling volute (2), and a sealed stator cavity (11) is formed between the rotor sleeve (6) and the cooling volute (2) to accommodate the stator assembly (7); the rotor cavity (13) is located inside the rotor sleeve (6).

4. The water pump according to claim 3, characterized in that: The rotor sleeve (6) comprises a cylinder (67) and a sleeve cover plate (65) fixed to one end of the cylinder (67) axially close to the pump water chamber (10); the portion of the sleeve cover plate (65) radially located outside the cylinder (67) seals one axial end of the stator chamber (11); the portion of the sleeve cover plate (65) radially located inside the cylinder (67) is penetrated by the cover plate channel (66) to serve as the outlet of the rotor chamber (13).

5. The water pump according to claim 3, characterized in that: The end of the cooling volute (2) which is axially away from the pump water chamber (10) is an end plate (23); the rotor sleeve (6) is sealed and connected to the middle part of the end plate (23); an end plate channel (24) is provided on the end plate (23) at a portion radially located inside the rotor sleeve (6); and a volute channel (25) which connects the heat dissipation chamber (12) and the end plate channel (24) is provided on the cooling volute (2); the heat dissipation chamber (12) is connected to the rotor chamber (13) via the volute channel (25) and the end plate channel (24) in sequence.

6. The water pump according to claim 2, characterized in that: A positioning groove (26) is provided in the outer surface of the cooling volute (2) on the end surface axially away from the pump water chamber (10), and a pin piece (43) is fixedly provided in the positioning groove (26). The pin piece (43) extends radially relative to the outer peripheral surface of the cooling volute (2) and is plugged and fixed to the pump housing (4).

7. The water pump according to any one of claims 2 to 6, characterized in that: The pump body further comprises an axial core (14), and the rotor assembly (8) is connected via the axial core (14) to drive the water pump assembly (5); the axial core (14) is provided with an axial core channel (141), and the inlet of the water pump cavity (10), the axial core channel (141), and the rotor cavity (13) are sequentially connected.

8. The water pump according to claim 7, characterized in that: It also includes a sealing plate (3) sealed and fixed to the cooling volute (2), a transition cavity (15) is formed between the sealing plate (3) and the cooling volute (2), and the outlet of the heat dissipation cavity (12), the transition cavity (15), the shaft core channel (141), and the inlet of the rotor cavity (13) are connected in sequence.

9. The water pump according to claim 7, characterized in that: A cooling channel (142) is arranged inside the shaft core (14), and a cooling groove (143) is arranged on the outer peripheral surface of the shaft core (14); an opening of the cooling channel (142) is arranged on the end surface of the shaft core (14) away from the pump water chamber (10) in the axial direction, and the other opening is arranged on the cooling groove (143), so that the cooling channel (142) is connected with the cooling groove (143) to form the shaft core channel (141).

10. The water pump according to any one of claims 1 to 6, characterized in that: It also includes a control box that is arranged separately from the pump body; a cable connector (1) is arranged on the pump housing (4), and the lead wire of the drive component is sealed and connected to the cable connector (1), and after extending out of the pump body through the cable connector (1), it is electrically connected to the control box.

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