Fluid assembly and electronic liquid pump using same

Abstract

The utility model discloses a fluid assembly and an electronic liquid pump using the fluid assembly. The fluid assembly comprises a pump shell, a base and an impeller assembly, wherein the pump shell and the base are matched to form an impeller cavity, and the impeller assembly is arranged in the impeller cavity. The impeller assembly comprises an impeller cover plate provided with a liquid inlet, an impeller bottom plate matched with the impeller cover plate to form a containing cavity and provided with a liquid outlet, and an impeller disc arranged in the containing cavity. A liquid injection pipe suitable for being communicated with the liquid inlet is further arranged on the pump shell, and a liquid passing channel communicated with the liquid inlet and the liquid injection pipe is pre-arranged on the pump shell; the liquid inlet is eccentrically arranged relative to the impeller cover plate, and the liquid passing channel is eccentrically arranged relative to the pump shell. The inner diameter of the end opening, facing the impeller assembly, of the liquid passing channel is larger than that of the end opening, connected with the liquid injection pipe, of the liquid passing channel; the end opening, facing the impeller assembly, of the liquid passing channel is suitable for directly facing the liquid inlet, and the inner diameter of the end opening, facing the impeller assembly, of the liquid passing channel is larger than that of the liquid inlet.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a fluid component and an electronic liquid pump using the fluid component. Background Art

[0002] With the rapid development of the electric vehicle industry, in order to shorten the waiting time for charging, the charging power of electric vehicles has been increasing. The increase in charging power has led to a gradual increase in the current carried by the charging gun line. The increase in the carrying current has made the heat dissipation requirements of the charging gun line more stringent. Traditional air cooling can no longer meet the large heat dissipation requirements of the charging gun line, while the excellent heat dissipation method of liquid cooling can just solve the large number of heat dissipation problems of the charging gun line. The excellent heat dissipation method of liquid cooling is mainly achieved by its core component, the electronic liquid pump.

[0003] Unlike traditional refueling operations where professional staff are responsible for refueling cars, charging electric vehicles is usually done by the car owners themselves, that is, the charging gun is usually configured on a self-service charging pile. In this regard, the heavier the charging gun, the lower the convenience and comfort during use. Therefore, in order to improve the owner's experience of using the charging gun when charging independently, the requirements for the charging gun and the cable connected to the charging gun are to improve its lightness. In order to optimize its lightness without replacing the material, the easier way to achieve is to reduce the outer diameter of the charging gun cable and use a thinner liquid cooling pipe to match the charging gun with a liquid cooling heat dissipation method. For this, the inlet and outlet pipes of the electronic water pump that provides power for the circulation of coolant in the liquid cooling pipe are also very thin. Because the inlet pipe opening is very thin, the electronic liquid pump is prone to air entrapment.

[0004] Therefore, in view of the fact that the corresponding electronic liquid pump of the lightweight charging gun is prone to air entrapment during use, it is necessary to further optimize and improve the structure of the electronic liquid pump. Utility Model Content

[0005] The first purpose of the utility model is to provide a fluid component to solve the technical problem of avoiding air entrapment during use.

[0006] The second purpose of the utility model is to provide an electronic liquid pump to solve the technical problem of improving the stability of its use.

[0007] The fluid assembly of the utility model is realized as follows:

[0008] A fluid assembly, comprising:

[0009] A pump housing and a base cooperate to form an impeller cavity, and an impeller assembly disposed in the impeller cavity;

[0010] The impeller assembly includes an impeller cover plate provided with a liquid inlet, an impeller bottom plate adapted to form a receiving cavity with the impeller cover plate and provided with a liquid outlet, and an impeller disc provided in the receiving cavity;

[0011] The pump housing is also provided with a liquid injection pipe suitable for communicating with the liquid inlet, and the pump housing is pre-set with a liquid passage connecting the liquid inlet and the liquid injection pipe; and

[0012] The liquid inlet is eccentrically arranged relative to the impeller cover plate, and the liquid passage is eccentrically arranged relative to the pump housing; the inner diameter of the port of the liquid passage toward the impeller assembly is larger than the inner diameter of the port of the liquid passage connected to the injection pipe;

[0013] The end of the liquid passage facing the impeller assembly is suitable for facing the liquid inlet, and the inner diameter of the end of the liquid passage facing the impeller assembly is larger than the inner diameter of the liquid inlet.

[0014] In an optional implementation of the present invention, a liquid cache cavity is formed inside the liquid passage; the inner diameter of the liquid cache cavity is not less than the inner diameter of the port of the liquid passage toward the impeller assembly.

[0015] In an optional implementation of the present invention, the liquid cache cavity adopts a cylindrical cavity.

[0016] In an optional implementation of the present invention, when the impeller assembly is fixed in the impeller chamber, there is a gap A between the end surface of the impeller chamber facing the impeller cover plate and the impeller cover plate; and

[0017] 1.5mm <A<3mm。

[0018] In an optional implementation of the utility model, liquid flow channels are respectively provided on the side end surfaces facing each other of the impeller cover plate and the impeller base plate; a plurality of channels penetrating the two axial ends of the impeller disk are distributed along the circumferential direction; and the liquid flow channels on the impeller cover plate and the impeller base plate are suitable for respectively cooperating with the impeller disk to form a complete and closed liquid flow cavity, which is simultaneously connected to the liquid inlet and the liquid outlet.

[0019] In an optional implementation of the present invention, the liquid flow channels on the impeller cover plate and the impeller bottom plate are both C-shaped annular flow channels coaxially arranged with the impeller disk; and

[0020] The C-shaped annular flow channels on the impeller cover plate and the impeller bottom plate have the same structure and are arranged in a corresponding manner.

[0021] The electronic liquid pump of the utility model is realized in this way:

[0022] An electronic liquid pump comprises: the fluid component as described above, and a motor unit used in conjunction with the fluid component;

[0023] The motor unit at least comprises a motor housing integrally formed with the base, and an output shaft with one end extending out of the motor housing; one end of the output shaft is suitable for penetrating the base, the impeller bottom plate and the impeller disc and then being inserted into the impeller cover plate.

[0024] In an optional implementation of the utility model, a liquid discharge channel suitable for communicating with the liquid outlet is formed on the base;

[0025] The pump housing is also provided with a liquid injection pipe suitable for communicating with the liquid inlet, and the pump housing is also provided with a liquid discharge pipe suitable for communicating with the liquid discharge channel.

[0026] In an optional implementation of the utility model, the end surface of the impeller bottom plate facing away from the impeller is provided with a positioning protrusion suitable for being inserted into the base, and the base is correspondingly designed with an annular cavity for accommodating the positioning protrusion;

[0027] The liquid outlet extends and passes through the positioning protrusion, and the liquid discharge channel is located on the cavity wall of the annular cavity; and

[0028] The positioning protrusion is formed with a relief portion for making way for the drainage channel.

[0029] In an optional implementation of the present invention, a concave-convex matching limiting structure is further provided between the cavity wall of the annular cavity and the positioning protrusion.

[0030] By adopting the above technical solution, the utility model has the following beneficial effects: for the fluid assembly of the utility model and the electronic liquid pump using the fluid assembly, for the liquid passage connected to the injection pipe, the inner diameter of the port of the liquid passage facing the impeller assembly is designed to be larger than the inner diameter of the port of the liquid passage connected to the injection pipe, so that the liquid passage can not only meet the adaptation requirements for the injection pipe with a small inner diameter, but also increase the amount of liquid above the liquid inlet of the corresponding impeller cover. At the same time, the port of the liquid passage facing the impeller assembly is suitable for facing the liquid inlet, and the inner diameter of the port of the liquid passage facing the impeller assembly is larger than the inner diameter of the liquid inlet. Under this design, the liquid outlet surface of the liquid passage just covers the liquid inlet of the impeller cover. Therefore, the utility model can increase the coverage area of ​​the liquid above the liquid inlet, thereby improving the drainage effect, so as to solve the problem of trapped air, and then achieve the high lift effect of the electronic liquid pump.

[0031] In addition, by respectively providing liquid flow channels on the side end surfaces facing each other of the impeller cover plate and the impeller bottom plate, a complete and closed flow channel is formed, ensuring that most of the liquid is in the flow channel or in the impeller disc. After the liquid enters the impeller assembly from the liquid inlet, driven by the high-speed rotation of the impeller disc, it can be ensured that most of the liquid will accelerate along the flow channel and will not leak. After high-speed rotation, the pressure difference between the liquid inlet of the impeller cover plate and the liquid outlet of the impeller bottom plate increases, so that the liquid can achieve a high head effect when it is discharged from the liquid outlet of the impeller bottom plate of the impeller lower cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the electronic liquid pump of the utility model;

[0033] Figure 2 This is a schematic diagram of the explosion decomposition structure of the electronic liquid pump of the utility model;

[0034] Figure 3 It is a schematic diagram of the separation of the impeller cover plate and the pump housing of the electronic liquid pump of the utility model;

[0035] Figure 4 It is a schematic structural diagram of a pump housing of an electronic liquid pump of the utility model;

[0036] Figure 5 It is a schematic diagram of the cooperation between the impeller cover plate and the pump housing of the electronic liquid pump of the utility model;

[0037] Figure 6 It is a partial structural schematic diagram of the impeller assembly of the electronic liquid pump of the utility model;

[0038] Figure 7 This is a schematic structural diagram of the impeller cover plate of the electronic liquid pump of the utility model from a first perspective;

[0039] Figure 8 It is a second perspective structural schematic diagram of the impeller cover plate of the electronic liquid pump of the utility model;

[0040] Fig. 9 It is a first-view structural schematic diagram of the impeller base plate of the electronic liquid pump of the utility model;

[0041] Fig.10 It is a second perspective structural schematic diagram of the impeller bottom plate of the electronic liquid pump of the utility model;

[0042] Fig.11 It is a structural schematic diagram of the impeller disk of the electronic liquid pump of the utility model;

[0043] Fig.12 It is a schematic diagram of the structure of the motor housing of the electronic liquid pump of the utility model;

[0044] Fig.13 It is a schematic diagram of the matching structure of the base and the impeller bottom plate of the electronic liquid pump of the utility model.

[0045] In the figure: pump housing 1, discharge pipe 11, injection pipe 12, liquid channel 13, liquid buffer chamber 131, impeller chamber 15, impeller cover plate 2, liquid inlet 21, screw 23, impeller base plate 3, liquid outlet 31, positioning protrusion 32, avoidance portion 33, shaft hole 34, recessed structure 35, accommodating groove 36, impeller disk 4, blades 41, channel 42, liquid flow channel 5, motor housing 7, base 8, annular cavity 81, discharge channel 82, protrusion structure 83, output shaft 9. DETAILED DESCRIPTION

[0046] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0047] Embodiment 1:

[0048] See also Figures 1 to 11 As shown, this embodiment provides a fluid assembly, including: a pump housing 1 and a base 8 that cooperate to form an impeller cavity 15, and an impeller assembly disposed in the impeller cavity 15. The impeller cavity 15 here is mainly formed in the pump housing 1, and the pump housing 1 is generally a cylindrical structure, and the base 8 is mainly used to fix one side end of the impeller assembly.

[0049] Firstly, the impeller assembly includes an impeller cover plate 2 with a liquid inlet 21, an impeller bottom plate 3 adapted to form a receiving cavity with the impeller cover plate 2 and with a liquid outlet 31, and an impeller disc 4 disposed in the receiving cavity. The impeller disc 4 rotates in the receiving cavity.

[0050] As an example of an optional implementation, the impeller cover plate 2 and the impeller base plate 3 can be fastened together by a plurality of screws 23. In this case, when the fluid assembly of this embodiment is applied to a specific electronic liquid pump, the impeller assembly can be assembled as an integral assembly when assembled into the overall electronic liquid pump, thereby improving assembly efficiency. It should be noted that when the impeller assembly is assembled and fixed in the impeller cavity 15, the impeller base plate 3 faces the base 8, and the impeller cover plate 3 faces away from the base 8, so that the liquid entering the impeller cavity 15 first enters the impeller cover plate 2, and then enters the impeller base plate 3 after passing through the impeller disc 4.

[0051] Secondly, the pump housing 1 is also provided with a liquid injection pipe 12 suitable for communicating with the liquid inlet 21 , and the pump housing 1 is pre-set with a liquid passage 13 communicating with the liquid inlet 21 and the liquid injection pipe 12 .

[0052] Based on the above situation, it should be noted that, in this embodiment, the liquid inlet 21 is eccentrically arranged relative to the impeller cover plate 2, and the liquid passage 13 is eccentrically arranged relative to the pump housing 1. Moreover, the liquid passage 13 of the pump housing 1 is not located at the exact center of the pump housing 1, and the port of the liquid passage 13 facing the impeller assembly is suitable for facing the liquid inlet 21, so that it can be ensured that after the liquid enters the pump housing 1 from the liquid injection pipe 12, it directly enters the liquid inlet 21 of the impeller cover plate 2, so that the liquid can fill the entire receiving cavity of the impeller assembly at the fastest speed, thereby avoiding the phenomenon of trapped air and achieving a high head effect.

[0053] In addition, it should be noted that the inner diameter of the port of the liquid passage 13 toward the impeller assembly is larger than the inner diameter of the port of the liquid passage 13 connected to the injection pipe 12. In a specific optional implementation, the inner diameter of the port of the liquid passage 13 toward the impeller assembly is at least three times the inner diameter of the port of the liquid passage 13 connected to the injection pipe 12.

[0054] Further, the inner diameter of the port of the liquid passage 13 toward the impeller assembly is larger than the inner diameter of the liquid inlet 21. In a specific optional implementation, the inner diameter of the port of the liquid passage 13 toward the impeller assembly is at least three times the inner diameter of the liquid inlet 21.

[0055] Based on the above situation, considering that the liquid passage 13 itself is formed on the pump housing 1, and the pump housing 1 has a certain wall thickness, a liquid cache cavity 131 is formed inside the liquid passage 13 by utilizing the wall thickness of the pump housing 1 itself; the inner diameter of the liquid cache cavity 131 is not less than the inner diameter of the port of the liquid passage 13 facing the impeller assembly. The liquid cache cavity 131 here can optionally adopt a cylindrical cavity.

[0056] In addition, considering that the impeller cover plate 2 and the impeller base plate 3 are fastened together by multiple screws 23, the nuts of the screws 23 that match the impeller cover plate 2 will exist between the impeller cover plate 2 and the end surface of the impeller chamber 15 facing the impeller cover plate 2, which will affect the size of the gap A formed between the impeller cover plate 2 and the end surface of the impeller chamber 15 facing the impeller cover plate 2. The size of the gap A directly affects the performance of the fluid component: if the gap A is too small, it will cause air entrapment after the liquid enters, so that the electronic liquid pump using the fluid component cannot discharge normally; if the gap A is too large, it will cause the liquid to enter the electronic liquid pump. After entering the liquid pump, it cannot directly enter the liquid inlet 21 of the impeller cover plate 2, and the liquid cannot fill the entire impeller assembly at the fastest speed. Based on the above situation, this embodiment has the following design:

[0057] When the impeller assembly is fixed in the impeller chamber 15, there is a gap A between the end face of the impeller chamber 15 facing the impeller cover plate 2 and the impeller cover plate 2; and 1.5 mm < A < 3 mm. Under this gap, it is possible to reserve an installation space for the nut and avoid the phenomenon of air entrapment in the electronic liquid pump, thereby ensuring the performance of the electronic liquid pump.

[0058] In summary, for the fluid assembly of this embodiment: for the liquid passage 13 connecting the liquid injection pipe 12, the inner diameter of the port of the liquid passage 13 facing the impeller assembly is designed to be larger than the inner diameter of the port of the liquid passage 13 connecting the liquid injection pipe 12, so that the liquid passage 13 can not only meet the adaptation requirements for the liquid injection pipe with a small inner diameter, but also increase the amount of liquid above the liquid inlet of the corresponding impeller cover plate 2. At the same time, the port of the liquid passage 13 facing the impeller assembly is adapted to face the liquid inlet 21, and the inner diameter of the port of the liquid passage 13 facing the impeller assembly is larger than the inner diameter of the liquid buffer chamber 131 of the liquid inlet 2. Under this design, the liquid outlet surface of the liquid passage 13 just covers the liquid inlet 21 of the impeller cover plate 2. Therefore, the utility model can increase the coverage area of the liquid above the liquid inlet 21, thereby improving the liquid discharge effect to solve the problem of air entrapment.

[0059] Embodiment 2:

[0060] Please refer to Figures 1 to 13 As shown, on the basis of the fluid assembly of Embodiment 1, this embodiment provides an electronic liquid pump, including: a pump body unit and a motor unit used in cooperation; wherein the dry motor unit is used to form the power for the operation of the pump body unit.

[0061] Next, specifically, first is the pump body unit, which includes a pump housing 1 and a base 8 that cooperate to form an impeller chamber 15, and an impeller assembly disposed in the impeller chamber 15. Here, the impeller chamber 15 is mainly formed in the pump housing 1. The pump housing 1 is generally in a cylindrical structure, and the base 8 is mainly used to fix one side end of the impeller assembly.

[0062] More specifically, the impeller assembly includes an impeller cover plate 2 provided with a liquid inlet 21, an impeller bottom plate 3 that is adapted to the impeller cover plate 2 to form a receiving chamber and is provided with a liquid outlet 31, and an impeller disk 4 disposed in the receiving chamber. The impeller disk 4 rotates in the receiving chamber. Taking an optional implementation case as an example with reference to the accompanying drawings, for the impeller cover plate 2 and the impeller bottom plate 3, the two can be optionally fastened and fitted through a plurality of screws. In such a case, the impeller assembly can be assembled as an integral component when assembled into the overall electronic liquid pump, improving the assembly efficiency. It should be noted that when the impeller assembly is assembled and fixed in the impeller chamber 15, the impeller bottom plate 3 faces the base 8, and the impeller cover plate 3 faces away from the base 8, so that the liquid entering the impeller chamber 15 first enters the impeller cover plate 2, and then enters the impeller bottom plate 3 after passing through the impeller disk 4.

[0063] Taking one case as an example with reference to the accompanying drawings, regarding the cooperation between the impeller disk 4, the impeller cover plate 2 and the impeller base plate 3, a receiving groove 36 for accommodating the impeller disk is recessed on the side end surface of the impeller base plate 3 facing the impeller cover plate 2; and the depth of the receiving groove 36 is slightly greater than the thickness of the impeller disk 4, and the impeller cover plate 2 is mainly used to form a cover for the receiving groove 36, so that the impeller disk 4 can reliably operate in the receiving groove 36.

[0064] It should also be noted that the impeller cover plate 2 and the impeller bottom plate 3 are respectively provided with liquid flow channels 5 on the side end surfaces facing each other; the impeller disc 4 is provided with a plurality of channels penetrating its two axial ends along the circumferential direction; and the liquid flow channels 5 on the impeller cover plate 2 and the impeller bottom plate 3 are suitable for respectively cooperating with the impeller disc 4 to form a complete and closed liquid flow cavity, which is simultaneously connected with the liquid inlet 21 and the liquid outlet 31. Under this structure, it is ensured that most of the liquid is in the flow channel or in the impeller disc 4. After the liquid enters the impeller assembly from the liquid inlet 21, driven by the high-speed rotation of the impeller disc 4, it can be ensured that most of the liquid will accelerate along the flow channel and will not leak. After high-speed rotation, the pressure difference between the liquid inlet 21 of the impeller cover plate 2 and the liquid outlet 31 of the impeller bottom plate 3 increases, so that the liquid can achieve a high lift effect when discharged from the liquid outlet 31 of the impeller bottom plate 3 under the impeller cover.

[0065] The outer wall surface of the impeller disk 4 used in this embodiment is a continuous and closed circumferential surface. A plurality of blades 41 of the same size are arranged at intervals along the circumferential direction of the impeller disk 4, and a channel 42 is formed between each two adjacent blades 41.

[0066] Based on the above situation, an optional implementation is given in conjunction with the accompanying drawings. The liquid flow channels 5 on the impeller cover plate 2 and the impeller bottom plate 3 are both C-shaped annular flow channels coaxially arranged with the impeller disk 4; and the C-shaped annular flow channels on the impeller cover plate 2 and the impeller bottom plate 3 have the same structure and are arranged in direct correspondence. The liquid flow channel 5 used in this embodiment is a C-shaped annular shape, that is, the length of the entire C-shaped annular shape spans a circumferential angle of less than 360°.

[0067] For example, an optional embodiment is provided in which the cross section of the C-shaped annular flow channel along the axial direction of the output shaft 9 is rectangular. The rectangular flow channel has a larger area than the semicircular flow channel, and can accommodate more liquid into the liquid flow channel 5, so that the impeller disc 4 will not dry grind, and can fill the entire cavity faster, always maintaining a high-speed rotation state, thereby achieving a high lift effect.

[0068] In addition, in a specific optional implementation, the C-shaped annular flow channel is coaxially distributed with the impeller disk 4; and the radial dimension of the C-shaped annular flow channel is the same as the radial dimension of the blade 41. Under this design, after the liquid enters the impeller cavity 15, driven by the high-speed rotation of the impeller disk 4, it can be ensured that most of the liquid will accelerate along the flow channel without leakage, and the liquid is quickly sucked into the liquid flow channel 5 of the impeller bottom plate 3 by the impeller disk 4. The liquid speeds up with the rotation of the impeller disk 4, and the effect of high lift can be achieved.

[0069] In addition, considering the matching problem between the impeller assembly and the output shaft 9, a positioning hole 22 suitable for the end of the output shaft 9 to be inserted is preset in the impeller cover plate 2; the positioning hole 22 is provided with a thrust piece 6 that is matched with the end of the output shaft 9. In this embodiment, in order to ensure the high head performance of the electronic liquid pump, the axial clearance between the end of the output shaft 9 and the positioning hole 22 of the impeller cover plate 2 needs to be as small as possible, so that it is easy for the output shaft 9 to rub against the impeller cover plate 2, causing the impeller cover plate 2 to wear, thereby causing the output shaft 9 to move forward, affecting the head of the electronic liquid pump. The thrust piece 6 here can effectively prevent the mutual wear between the end of the output shaft 9 and the impeller cover plate 2 when achieving high head. It should be noted that the material of the thrust piece 6 in this embodiment is different from that of the impeller cover plate 2, and the thrust piece 6 can be made of wear-resistant metal material.

[0070] Next, the motor unit is described, which includes at least a motor housing 7 integrally formed with the base 8, and an output shaft 9 with one end extending out of the motor housing 7; one end of the output shaft 9 is suitable for passing through the base 8, the impeller bottom plate 3 and the impeller disk 4 and then inserted into the impeller cover plate 2.

[0071] Regarding the motor unit of this embodiment, it should also be noted that it can optionally adopt any mature means in the prior art, which generally includes a stator assembly and a rotor assembly used in conjunction. The stator assembly is accommodated in the motor housing 7 to form a dry cavity; the rotor assembly is accommodated in the cavity formed by the stator assembly and the base 8 to form a wet cavity, which is used to contain liquid. Of course, it can be understood that the motor unit also includes a controller to realize the control of the operating state of the motor unit.

[0072] In terms of an implementation for ease of processing, the base 8 and the motor housing 7 are integrally molded by injection molding. In this case, for the overall electronic liquid pump, it is only necessary to assemble the pump housing 1 and the motor housing 7 by means of, for example but not limited to, screws to quickly complete the assembly of the motor liquid pump, and there is no need to consider an assembly problem between the base 8 and the motor housing 7 body, and the integral injection molding structure has higher strength and stability.

[0073] Here, an optional implementation is specifically described in conjunction with the accompanying drawings. Regarding the specific fixing method between the impeller unit and the base 8, this embodiment has the following design:

[0074] The end surface of the impeller bottom plate 3 facing away from the impeller is provided with a positioning protrusion 32 suitable for being inserted into the base 8, and the corresponding base 8 is designed with an annular cavity 81 for accommodating the positioning protrusion 32; the liquid outlet 31 extends and passes through the positioning protrusion 32, and the drainage channel 82 is located on the cavity wall of the annular cavity 81; and the positioning protrusion 32 is formed with an avoidance portion 33 for making way for the drainage channel 82. For an optional situation, in conjunction with the accompanying drawings, the positioning protrusion 32 can be a cylindrical structure that is adapted to the annular cavity 81 and arranged coaxially with the impeller bottom plate 3, and the avoidance portion 33 can be understood as a small fan-shaped structure cut off from the cylindrical structure, and the output shaft 9 must pass through the impeller bottom plate 3, so the output shaft 9 also needs to pass through the positioning protrusion 32, and the cut-off small fan-shaped structure at this time will not extend to the axial hole 34 on the positioning protrusion 32 that matches the output shaft 9. Here, the cooperation between the positioning protrusion 32 and the annular cavity 81 allows a reliable cooperation between the impeller bottom plate 3 and the base 8, and the design of the avoidance portion 33 ensures that the positioning protrusion 32 does not block the drainage channel 82 on the base 8, thereby ensuring the rapid discharge of the liquid in the base 8 and further ensuring high lift.

[0075] On the basis of the above structure, a concave-convex limiting structure is further provided between the cavity wall of the annular cavity 81 and the positioning protrusion 32. Here, a protrusion structure 83 can be designed on the cavity wall of the annular cavity 81, and a recessed structure 35 adapted to the protrusion mechanism can be designed on the positioning protrusion 32. The design of the limiting structure here ensures that when the base 8 and the impeller bottom plate 3 are assembled in place, the liquid flowing out of the liquid outlet 31 on the impeller bottom plate 3 can smoothly enter the drainage channel 82 on the base 8.

[0076] Furthermore, in order to enable the base 8 of this embodiment to be used in conjunction with the impeller unit, a drainage channel 82 suitable for communicating with the liquid outlet 31 is formed on the base 8, and the drainage channel 82 forms a liquid outflow channel 42. The drainage channel 82 is preferably a semi-enclosed structure, and a drainage pipe 11 suitable for communicating with the drainage channel 82 is provided on the pump housing 1. Here, when the pump housing 1 and the motor housing 7 are assembled in place, the injection pipe 12 is located on the top wall of the pump housing 1 facing the impeller cover plate 2, and the drainage pipe 11 is located on the side wall of the pump housing 1, so that the drainage channel 82 corresponds to the drainage pipe 11, so as to facilitate the accumulation of liquid in the wet cavity. Under the connection of short-term pressure, the liquid in the wet cavity passes through the drainage channel 82 to reach the drainage pipe 11 faster, thereby improving the drainage efficiency while improving the head.

[0077] On the basis of the above situation, it is also necessary to explain that matching holes for adapter screws are designed on the motor housing 7 and the pump housing 1. In this regard, in an optional implementation, the matching holes on the motor housing 7 and the pump housing 1 are arranged in an uneven structure, thereby achieving an anti-mistake effect and ensuring that the discharge channel 82 on the base 8 and the discharge pipe 11 on the pump housing 1 are accurately aligned.

[0078] In summary, for the electronic liquid pump of this embodiment, after the liquid (when the electronic liquid pump is used in a charging wire gun, the liquid is also the coolant) enters the pump housing 1 from the filling pipe 12, the liquid passes through the impeller assembly, and then under the action of the pressure in the cavity, the liquid flows through the discharge channel 82 of the base 8, and finally is discharged from the discharge pipe 11 of the pump housing 1.

[0079] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0080] In the description of the present invention, it is necessary to understand that the terms indicating 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0083] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0084] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A fluid component, characterized in that: include: A pump housing and a base cooperate to form an impeller cavity, and an impeller assembly disposed in the impeller cavity; The impeller assembly includes an impeller cover plate provided with a liquid inlet, an impeller bottom plate adapted to form a receiving cavity with the impeller cover plate and provided with a liquid outlet, and an impeller disc provided in the receiving cavity; The pump housing is also provided with a liquid injection pipe suitable for communicating with the liquid inlet, and the pump housing is pre-set with a liquid passage connecting the liquid inlet and the liquid injection pipe; and The liquid inlet is eccentrically arranged relative to the impeller cover plate, and the liquid passage is eccentrically arranged relative to the pump housing; the inner diameter of the port of the liquid passage toward the impeller assembly is larger than the inner diameter of the port of the liquid passage connected to the injection pipe; The end of the liquid passage facing the impeller assembly is suitable for facing the liquid inlet, and the inner diameter of the end of the liquid passage facing the impeller assembly is larger than the inner diameter of the liquid inlet.

2. The fluid assembly according to claim 1, characterized in that: A liquid buffer cavity is formed inside the liquid passage; the inner diameter of the liquid buffer cavity is not less than the inner diameter of the port of the liquid passage facing the impeller assembly.

3. The fluid assembly according to claim 2, characterized in that: The liquid buffer cavity adopts a cylindrical cavity.

4. The fluid assembly according to claim 1, characterized in that: When the impeller assembly is fixed in the impeller chamber, there is a gap A between the end surface of the impeller chamber facing the impeller cover plate and the impeller cover plate; and 1.5mm <A<3mm。 5. The fluid assembly according to claim 1, characterized in that: Liquid flow channels are respectively provided on the side end surfaces facing each other of the impeller cover plate and the impeller bottom plate; a plurality of channels penetrating the two axial ends of the impeller disk are distributed along the circumferential direction; and the liquid flow channels on the impeller cover plate and the impeller bottom plate are suitable for respectively cooperating with the impeller disk to form a complete and closed liquid flow cavity, which is simultaneously connected to the liquid inlet and the liquid outlet.

6. The fluid assembly according to claim 5, characterized in that The liquid flow channels on the impeller cover plate and the impeller bottom plate are both C-shaped annular flow channels arranged coaxially with the impeller disk; and The C-shaped annular flow channels on the impeller cover plate and the impeller bottom plate have the same structure and are arranged in a corresponding manner.

7. An electronic liquid pump, characterized in that: include: The fluid component according to any one of claims 1 to 6, and a motor unit used in conjunction with the fluid component; The motor unit at least comprises a motor housing formed integrally with the base, and an output shaft with one end extending out of the motor housing; One end of the output shaft is suitable for penetrating the base, the impeller bottom plate and the impeller disc and then being inserted into the impeller cover plate.

8. The electronic liquid pump according to claim 7, characterized in that: The base is formed with a liquid discharge channel adapted to communicate with the liquid outlet; The pump housing is also provided with a liquid injection pipe suitable for communicating with the liquid inlet, and the pump housing is also provided with a liquid discharge pipe suitable for communicating with the liquid discharge channel.

9. The electronic liquid pump according to claim 8, characterized in that: The end surface of the impeller bottom plate facing away from the impeller is provided with a positioning protrusion suitable for being inserted into the base, and the base is correspondingly designed with an annular cavity for accommodating the positioning protrusion; The liquid outlet extends and passes through the positioning protrusion, and the liquid discharge channel is located on the cavity wall of the annular cavity; and The positioning protrusion is formed with a relief portion for making way for the drainage channel.

10. The electronic liquid pump according to claim 9, characterized in that: A concave-convex matching limiting structure is also provided between the cavity wall of the annular cavity and the positioning protrusion.

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