Self-adaptive rotor assembly, electronic water pump and new energy automobile

Abstract

The utility model relates to the technical field of electronic water pumps, in particular to a self-adaptive rotor assembly, an electronic water pump and a new energy automobile. A self-adaptive rotor assembly comprises a fixed shaft, an impeller, a shell, a transmission part and buffer rubber. The impeller sleeves the fixed shaft and is connected with the fixed shaft through a transmission part; one end of the fixed shaft is fixedly connected with the shell, and the other end of the fixed shaft is in flexible contact with the shell through buffer rubber. In conclusion, the technical problem of how to reduce the swing amplitude of the impeller under the condition that the radial hydraulic pressure of the impeller is unbalanced in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, and in particular to an adaptive rotor component, an electronic water pump, and a new energy vehicle. Background Art

[0002] The rapid development of new energy vehicles, while pursuing lightweight, has gradually increased the power density requirements of various power components. This requires the heat dissipation capacity of power components to be stronger. The performance stability and long-term operation reliability of the electronic cooling water pump, which serves as the circulating power of the heat dissipation cooling medium, are very important.

[0003] Patent document CN110374888A discloses an electronic water pump; referring to the prior art, the end of the fixed shaft away from the pump cover is fixed, while the end of the fixed shaft facing the pump cover is suspended, that is, the fixed shaft is a cantilever beam structure with a fixed tail end, and the impeller is arranged and fixed at the front end of the fixed shaft; and usually, the radial liquid pressure on the impeller is asymmetric. There are many reasons for the asymmetric radial pressure of the impeller. For example, when the impeller and the fixed shaft are assembled, the axis of the impeller is not parallel to the axis of the fixed shaft, and there is an acute angle, which will cause the gap between the impeller and the pump cover to have different radial widths along the impeller. When the liquid flows into the gap between the impeller and the pump cover, the volume of the liquid is different along the radial direction of the impeller. Correspondingly, the part with larger volume has a greater pressure on the impeller, and the part with smaller volume has a smaller pressure on the impeller. This causes the radial pressure of the fluid on the impeller to be different along the radial direction of the impeller. For another example, the fluid is drawn into the pump cover from the inlet of the pump cover, and then enters between the pump cover and the impeller. In the process of being drawn in, the fluid is likely to form a vortex, which will also cause the pressure of the liquid on the impeller to be different along the radial direction of the impeller when the fluid acts on the impeller.

[0004] This asymmetric liquid pressure along the radial direction of the impeller will cause the impeller to be subjected to a rotational torque, which will be transmitted to the fixed shaft, causing the fixed shaft to swing cantilevered with the tail end as the fulcrum. If the swinging energy is not eliminated in time, it will cause the swinging energy to continue to exist between the impeller and the fixed shaft, causing the front end of the fixed shaft and the impeller to vibrate continuously up and down. This vibration will increase the impeller noise and will be transmitted to the rotor and fixed shaft, affecting the service life of the water pump. If the swing amplitude of the impeller can be reduced under the condition of hydraulic imbalance in the radial direction of the impeller, the noise of the impeller can be reduced and the service life of the water pump can be extended.

[0005] In summary, how to reduce the swing amplitude of the impeller under the condition of hydraulic imbalance in the radial direction of the impeller is a technical problem that needs to be solved. Utility Model Content

[0006] With regard to the prior art, when the impeller is subjected to hydraulic imbalance in radial direction, how to reduce the swing amplitude of the impeller is a technical problem that needs to be solved. The utility model provides an adaptive rotor assembly, an electronic water pump, and a new energy vehicle.

[0007] The utility model is realized by the following technical solutions:

[0008] An adaptive rotor assembly includes a fixed shaft, an impeller, a housing, a transmission component, and a buffer rubber;

[0009] The impeller is sleeved on the fixed shaft and connected to the fixed shaft through a transmission component;

[0010] One end of the fixed shaft is fixedly connected to the housing, and the other end forms a flexible contact with the housing through a buffer rubber.

[0011] Furthermore, the housing includes a pump cover and a metal shell that are interlocked and detachably connected, and a fixing block is arranged in the pump cover;

[0012] It also includes an isolation cover, which is sleeved outside the fixed shaft, a protrusion is provided at the rear of the isolation cover, a receiving groove is provided in the protrusion, an end of the fixed shaft away from the pump cover is inserted into the receiving groove, and an end of the fixed shaft facing the pump cover penetrates the central through hole of the impeller and is connected to a fixing block on the pump cover;

[0013] Along the radial direction of the fixed shaft, the buffer rubber is arranged between the outer surface of the protrusion and the hole wall of the accommodating hole.

[0014] Furthermore, it also includes a support sleeve, which is sleeved on one end of the fixed shaft away from the pump cover, and is located between the fixed shaft and the accommodating groove along the radial direction of the fixed shaft;

[0015] A conical guide channel is arranged on one side of the support sleeve facing the pump cover, and points from the pump cover to the protruding portion. The inner wall of the conical guide channel gradually converges and communicates with the cylindrical channel of the support sleeve.

[0016] Furthermore, it also includes a rotor, the rotor is provided with a through channel, and the fixed shaft is passed through the through channel;

[0017] Also included is a transition metal sleeve, a portion of which is detachably connected to the rotor;

[0018] Along the radial direction of the impeller, another portion of the transition metal sleeve is located between the hole wall of the central through hole of the impeller and the outer surface of the portion of the fixed axis located in the central through hole.

[0019] Furthermore, it also includes a front sliding bearing and a rear sliding bearing, wherein the front sliding bearing and the rear sliding bearing are arranged between the rotor and the fixed shaft;

[0020] The transition metal sleeve, the rotor, the front sliding bearing and the rear sliding bearing are each part of the transmission components.

[0021] Further, it further includes a stator which is arranged inside the metal shell, and the stator and the rotor are isolated by an isolation cover;

[0022] Along the circumferential direction of the stator, there is a first gap between the stator and the isolation cover. In the direction from the pump cover to the protrusion, the width of the first gap gradually increases along the radial direction of the stator.

[0023] And the maximum width of the first gap is limited to a first width.

[0024] Further, the buffer rubber is a rubber ring made of silicone rubber, a rubber ring made of nitrile rubber or a rubber ring made of ethylene propylene rubber.

[0025] Further, an electronic water pump is also proposed, which includes the above-mentioned adaptive rotor assembly.

[0026] Further, a new energy vehicle is also proposed, which includes the above-mentioned adaptive rotor assembly.

[0027] Or it includes the above-mentioned electronic water pump.

[0028] Compared with the prior art, the advantages of the present utility model are as follows:

[0029] 1. In the present utility model, the impeller is sleeved on the fixed shaft and connected to the fixed shaft through transmission components. The impeller can drive the fixed shaft to swing through the transmission components. Compared with the prior art, the fulcrum of the cantilever beam of the fixed shaft is replaced. In the prior art, the fulcrum is at the tail end of the fixed shaft, while in the present utility model, the fulcrum is at the front end of the fixed shaft. And in the structure where the fixed shaft swings with the front end as the fulcrum and the tail end, a buffer rubber is arranged between the tail end of the fixed shaft and the shell; when the impeller swings, it drives the fixed shaft to swing through the transmission components, the fixed shaft squeezes the buffer rubber, the buffer rubber deforms, and the buffer rubber is subjected to its own elastic force and gives a reaction force to the tail end of the fixed shaft. This reaction force acts on the impeller through the fixed shaft and the transmission components, thereby reducing the swing amplitude of the impeller. Or, in other words, when the impeller swings, the swing energy is transmitted to the buffer rubber through the transmission components and the fixed shaft, and the buffer rubber absorbs all or part of the swing energy, thereby reducing the swing amplitude of the impeller.

[0030] To sum up, the present utility model solves the technical problem that needs to be solved by the prior art of how to reduce the swing amplitude of the impeller under the condition of uneven hydraulic pressure in the radial direction of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the adaptive rotor assembly of the present utility model;

[0032] Figure 2 For Figure 1 Schematic diagram of the structure of area A in

[0033] Figure 3 Simplified diagram of the forces on the impeller and fixed shaft in Embodiment 1

[0034] Figure 4 Schematic diagram of the structure of the first gap in Embodiment 1

[0035] Markings in the figure: fixed shaft (1), impeller (2), housing (3), buffer rubber (4), pump cover (5), metal shell (6), fixing block (7), isolation cover (8), protruding part (9), receiving groove (10), support sleeve (11), conical guiding channel (12), rotor (13), transition metal sleeve (14), stator (15), first gap (16), front sliding bearing (17), rear sliding bearing (18). Specific embodiments

[0036] The following further non - restrictive and detailed description of the technical solution of the utility model is made in conjunction with the preferred embodiments and their accompanying drawings. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model.

[0037] Embodiment 1

[0038] As Figures 1 to 2 shown, this embodiment proposes an adaptive rotor assembly, which includes a fixed shaft 1, an impeller 2, a housing 3, a transmission component, and a buffer rubber 4; the impeller 2 is sleeved on the fixed shaft 1 and is connected to the fixed shaft 1 through the transmission component. One end of the fixed shaft 1 is fixedly connected to the housing 3, and the other end forms a flexible contact with the housing 3 through the buffer rubber 4.

[0039] The housing 3 includes a pump cover 5 and a metal shell 6 which are interlocked and detachably connected to each other, and the detachable connection is made by screws or bolts; this part is also prior art and will not be elaborated here.

[0040] The fixed shaft 1 is an axis structure extending in a straight line. The fixed shaft 1 is the motor shaft. The fixed shaft 1 is a key component in the adaptive rotor assembly. The two ends of the fixed shaft 1 along the axial distribution are the front end and the tail end respectively. In this embodiment, the end of the fixed shaft facing the pump cover is the front end, and the end of the fixed shaft away from the pump cover is the tail end.

[0041] One end of the fixed shaft 1, i.e. the front end, is fixedly connected to the housing 3; specifically, in the present embodiment, a fixing block 7 is provided in the pump cover 5; one end of the fixed shaft 1 toward the pump cover 5 penetrates the central through hole of the impeller 2 and is connected to the fixing block 7 on the pump cover 5.

[0042] The other end of the fixed shaft 1, i.e. the tail end, forms a flexible contact with the housing 3 through the buffer rubber 4; specifically, in the present embodiment, the adaptive rotor assembly also includes an isolation cover 8, which is sleeved on the outside of the fixed shaft 1, and a protrusion 9 is provided at the tail of the isolation cover 8, and a receiving groove 10 is provided in the protrusion 9. The end of the fixed shaft 1 facing away from the pump cover 5 is inserted into the receiving groove 10, and along the radial direction of the fixed shaft 1, the buffer rubber 4 is provided between the outer surface of the protrusion 9 and the hole wall of the receiving hole.

[0043] The impeller 2 is used to provide reversing and pressure for the fluid, and its structure is prior art and will not be described in detail here. In this embodiment, the impeller 2 is sleeved on a section of the outer surface of the front end close to the fixed axis.

[0044] The transmission component is composed of multiple components. In this embodiment, the adaptive rotor assembly also includes a rotor 13, which is provided with a through channel, and the fixed shaft 1 is provided in the through channel; it also includes a transition metal sleeve 14, a part of which is detachably connected to the rotor 13; along the radial direction of the impeller 2, another part of the transition metal sleeve 14 is located between the hole wall of the central through hole of the impeller 2 and the outer surface of the part of the fixed shaft 1 located in the central through hole. Further, the adaptive rotor assembly also includes a front sliding bearing 17 and a rear sliding bearing 18, which are arranged between the rotor 13 and the fixed shaft 1.

[0045] The transition metal sleeve 14, the rotor 13, the front sliding bearing 17 and the rear sliding bearing 18 are all parts of the transmission component. The impeller 2 transmits force to the fixed shaft 1 through the transmission component, and the fixed shaft 1 can also transmit force to the impeller 2 through the transmission component; for example, when the impeller 2 is subjected to unbalanced liquid pressure in the radial direction, the force transmission path is: the impeller 2, the transition metal sleeve 14, the rotor 13, the front sliding bearing 17 and the rear sliding bearing 18, and the fixed shaft 1.

[0046] The function of the transition metal sleeve 14 is as follows: The rotor assembly is usually immersed in the coolant, and the liquid pumped out by the impeller is also the coolant. The impeller is made of plastic material. When the plastic material is immersed in the coolant for a long time, a swelling phenomenon will occur. The swelling phenomenon is the phenomenon that the volume of plastics and other high molecular polymers expands in the solvent. In the prior art, this swelling phenomenon will cause the hole wall of the central through hole of the impeller to expand towards the outer surface of the fixed shaft, thereby reducing the gap between the hole wall of the central through hole of the impeller and the outer surface of the fixed shaft, resulting in an increase in the frictional force between the impeller and the fixed shaft and an increase in the impurities generated by wear. In this embodiment, to solve this problem, a transition metal sleeve 14 is provided between the hole wall of the central through hole of the impeller and the outer surface of a part of the fixed shaft 1 located in the central through hole. The transition metal sleeve 14 is made of metal, such as aluminum alloy. The setting of the transition metal sleeve 14 prevents the hole wall of the central through hole of the impeller from expanding towards the outer surface of the fixed shaft during the swelling phenomenon, so that the hole wall of the central through hole of the impeller can only expand towards the direction away from the outer surface of the fixed shaft, thereby avoiding the problem of the increase in the frictional force between the impeller and the fixed shaft caused by the reduction of the gap between the hole wall of the central through hole of the impeller and the outer surface of the fixed shaft.

[0047] The buffer rubber 4 is an elastic rubber ring, rubber sleeve or rubber part. For example, it can be a rubber ring made of silicone rubber, a rubber ring made of nitrile rubber or a rubber ring made of ethylene propylene rubber. The buffer rubber 4 can be compressed when subjected to external force extrusion, and can maintain a certain elastic force when the external force is not removed. This elastic force is opposite to the direction of the external force extrusion, and can recover its deformation automatically after the external force is removed.

[0048] Furthermore, in this embodiment, the adaptive rotor assembly further includes a support sleeve 11. The support sleeve 11 is sleeved on one end of the fixed shaft 1 away from the pump cover 5, and along the radial direction of the fixed shaft 1, the support sleeve 11 is located between the fixed shaft 1 and the accommodation groove 10. On the side of the support sleeve 11 facing the pump cover 5, a conical guiding channel 12 is provided. In the direction from the pump cover 5 to the protruding part 9, the inner wall of the conical guiding channel 12 gradually converges and communicates with the cylindrical channel of the support sleeve 11. During assembly, the support sleeve 11 is first assembled with the accommodation groove 10, and then the tail end of the fixed shaft is blindly inserted into the cylindrical channel of the support sleeve 11. The setting of the conical guiding channel 12 plays a guiding role for the tail end of the fixed shaft 1 during the process of blindly inserting the tail end of the fixed shaft 1 into the cylindrical channel of the support sleeve 11.

[0049] The following takes the situation where the hydraulic pressure in the upper half part of the impeller is greater than that in the lower half part along the radial direction as an example to illustrate the operating principle of this embodiment. Specifically, as Figures 1 to 3As shown, when the liquid pressure FA on the radial surface of the impeller is greater than FB, this hydraulic pressure difference will form a displacement trend on the impeller. The form of this trend causes the impeller part subjected to FA to move from left to right, and the impeller part subjected to FB to move from right to left, that is, the above hydraulic pressure difference gives the impeller a first clockwise moment, which causes the impeller to swing around the swing center with the intersection of its own radial center axis and the axial center axis of the fixed shaft as the swing center; then, the first moment of the impeller is transmitted to the tail end of the fixed shaft 1 through the transition metal sleeve 14, the rotor 13, the front sliding bearing 17 and the rear sliding bearing 18, and finally, causes the tail end of the fixed shaft 1 to swing downward; then, the tail end of the fixed shaft 1 transmits the rotational energy through the support sleeve 11, The protrusion 9 is transmitted to the buffer rubber 4, squeezing the lower half of the buffer rubber 4, so that the lower half of the buffer rubber 4 is deformed; the buffer rubber 4 is an elastic member, and after the lower half of the buffer rubber 4 is deformed, the lower half of the buffer rubber 4 will give the fixed shaft 1 an upward reaction force, and the second torque formed by the reaction force will be transmitted to the tail end of the fixed shaft 1 through the protrusion 9 and the support sleeve 11 in sequence, and then from the tail end of the fixed shaft 1, it will pass through the front sliding bearing 17 and the rear sliding bearing 18, the rotor 13, and the transition metal sleeve 14 in sequence to act on the impeller. At the same time, the second torque is opposite to the direction of the first torque, so that part or all of the first torque is offset by the second torque, thereby reducing the swing amplitude of the impeller.

[0050] Furthermore, the above process can also be explained from the perspective of energy absorption. Specifically, in this embodiment, the front end of the fixed shaft is fixed, and the tail end of the fixed shaft forms a flexible contact with the shell 3 through the buffer rubber 4. Then the impeller is subjected to radially unbalanced hydraulic pressure, which will cause the impeller to be subjected to a swinging energy that causes it to swing. This swinging energy will pass through: the transition metal sleeve 14, the rotor 13, the front sliding bearing 17 and the rear sliding bearing 18, and finally act on the tail end of the fixed shaft 1. The tail end of the fixed shaft 1 transfers the rotational energy to the buffer rubber 4 through the support sleeve 11 and the protrusion 9, so that the rotational energy is fully or partially absorbed by the buffer rubber 4; thereby reducing the swing amplitude of the impeller.

[0051] Further, in this embodiment, the front end of the fixed shaft 1 is fixed and immovable, while the tail end can float up and down. The fixed shaft 1 can still be regarded as a cantilever beam. However, the difference from the prior art is that the up-and-down floating of the tail end of the fixed shaft 1 is not unrestricted. Instead, the up-and-down floating displacement of the tail end of the fixed shaft 1 is elastically restricted by the buffer rubber 4. Then, there is another advantage. When the liquid pressure FA > FB on the radial surface of the impeller and the impeller swings clockwise around the swing center, the impeller will cause the tail end of the fixed shaft to displace downward through the transition metal sleeve 14, the rotor 13, the front sliding bearing 17, the rear sliding bearing 18, the protrusion 9, and the support sleeve 11. After that, the gap between the upper half of the impeller and the pump cover increases. The liquid located between the upper half of the impeller and the pump cover will increase in volume under the condition of constant flow velocity. Correspondingly, the pressure of this part of the liquid will decrease. Similarly, the gap between the lower half of the impeller and the pump cover decreases. The liquid located between the lower half of the impeller and the pump cover will decrease in volume under the condition of constant flow velocity, and the pressure of this part of the liquid will increase. Then, it will cause FA to gradually equal FB, that is, FA and FB will gradually balance. This is also the adaptive adjustment function of the adaptive rotor assembly in this embodiment.

[0052] Further, there is another advantage of the adaptive rotor assembly in this embodiment. The support sleeve 11 is made of metal material and has the function of vibration transmission itself. The swing energy at the tail end of the fixed shaft can also be finally transmitted to the housing through the support sleeve 11, the protrusion 9, and the part of the isolation cover 8 outside the protrusion 9. This is also beneficial to reducing the swing energy at the tail end of the fixed shaft.

[0053] As can be seen from the background art, under the condition of unbalanced hydraulic pressure in the radial direction of the impeller, how to reduce the swing amplitude of the impeller is a technical problem that needs to be solved in the prior art.

[0054] In this embodiment, the impeller 2 is sleeved on the fixed shaft 1 and is connected to the fixed shaft 1 through a transmission component. The impeller 2 can drive the fixed shaft to swing through the transmission component. Compared with the prior art in this embodiment, the fulcrum of the cantilever beam of the fixed shaft 1 is replaced. In the prior art, the fulcrum is at the tail end of the fixed shaft 1, while in this embodiment, the fulcrum is at the front end of the fixed shaft 1. Moreover, in the structure where the fixed shaft 1 swings with the front end as the fulcrum and the tail end swings, a buffer rubber 4 is provided between the tail end of the fixed shaft 1 and the housing 3. When the impeller swings, it drives the fixed shaft 1 to swing through the transmission component. The fixed shaft 1 squeezes the buffer rubber 4, and the buffer rubber 4 deforms. The buffer rubber 4 is subjected to its own elastic force and gives a reaction force to the tail end of the fixed shaft 1. This reaction force acts on the impeller through the fixed shaft 1 and the transmission component, thereby reducing the swing amplitude of the impeller. Or, in other words, when the impeller swings, the swing energy is transmitted to the buffer rubber 4 through the transmission component and the fixed shaft 1. The buffer rubber 4 absorbs all or part of the swing energy, thereby reducing the swing amplitude of the impeller.

[0055] In summary, this embodiment solves the technical problem that the prior art needs to address, which is how to reduce the swing amplitude of the impeller under the condition of uneven hydraulic pressure in the radial direction of the impeller.

[0056] As Figure 1 , Figure 4 Furthermore, this embodiment also includes the following technical solution: The adaptive rotor assembly further includes a stator 15, which is arranged inside the metal shell 6, and the stator 15 and the rotor 13 are isolated by an isolation cover 8; along the circumferential direction of the stator 15, there is a first gap 16 between the stator 15 and the isolation cover 8. In the direction from the pump cover 5 to the protrusion 9, the width of the first gap 16 along the radial direction of the stator 15 gradually increases, and the maximum width of the first gap 16 is limited to a first width. The value of the first width is set according to specific circumstances and is not limited here.

[0057] As can be seen from the foregoing, when the impeller swings due to uneven radial force, the impeller will drive the fixed shaft 1 to swing through the transmission component. In this embodiment, in the direction from the pump cover 5 to the protrusion 9, the width of the first gap 16 along the radial direction of the stator 15 gradually increases, that is, the first gap 16 is arranged in a divergent shape. Thus, during the process where the front end of the fixed shaft 1 remains stationary and the tail end swings, it makes way for the isolation cover 8 that swings together with the tail end of the fixed shaft 1.

[0058] Embodiment 2

[0059] This embodiment provides an electronic water pump, which includes the adaptive rotor assembly in Embodiment 1.

[0060] Embodiment 3

[0061] This embodiment provides a new energy vehicle, which includes the adaptive rotor assembly in Embodiment 1.

[0062] Furthermore, it may include the electronic water pump in Embodiment 2.

[0063] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. An adaptive rotor assembly, characterized in that: It comprises a fixed shaft (1), an impeller (2), a housing (3), a transmission component, and a buffer rubber (4); The impeller (2) is sleeved on the fixed shaft (1) and connected to the fixed shaft (1) via a transmission component; One end of the fixed shaft (1) is fixedly connected to the housing (3), and the other end forms a flexible contact with the housing (3) via a buffer rubber (4).

2. The adaptive rotor assembly according to claim 1, characterized in that: The housing (3) comprises a pump cover (5) and a metal shell (6) which are interlocked and detachably connected, and a fixing block (7) is arranged inside the pump cover (5); It also includes an isolation cover (8), the isolation cover (8) is sleeved outside the fixed shaft (1), a protrusion (9) is provided at the rear of the isolation cover (8), a receiving groove (10) is provided in the protrusion (9), an end of the fixed shaft (1) facing away from the pump cover (5) is inserted into the receiving groove (10), and an end of the fixed shaft (1) facing the pump cover (5) penetrates the central through hole of the impeller (2) and is connected to a fixing block (7) on the pump cover (5); Along the radial direction of the fixed shaft (1), the buffer rubber (4) is arranged between the outer surface of the protrusion (9) and the hole wall of the accommodating hole.

3. The adaptive rotor assembly according to claim 2, characterized in that: It also comprises a support sleeve (11), which is sleeved on an end of the fixed shaft (1) away from the pump cover (5), and is located between the fixed shaft (1) and the accommodating groove (10) along the radial direction of the fixed shaft (1); A conical guide channel (12) is provided on the side of the support sleeve (11) facing the pump cover (5), pointing from the pump cover (5) to the direction of the protrusion (9), and the inner wall of the conical guide channel (12) gradually converges and communicates with the cylindrical channel of the support sleeve (11).

4. The adaptive rotor assembly according to claim 3, characterized in that: It also includes a rotor (13), the rotor (13) is provided with a through-channel, and the fixed shaft (1) is passed through the through-channel; It also includes a transition metal sleeve (14), a portion of which is detachably connected to the rotor (13); Along the radial direction of the impeller (2), another part of the transition metal sleeve (14) is located between the hole wall of the central through hole of the impeller (2) and the outer surface of the part of the fixed shaft (1) located in the central through hole.

5. The adaptive rotor assembly according to claim 4, characterized in that: It also includes a front sliding bearing (17) and a rear sliding bearing (18), wherein the front sliding bearing (17) and the rear sliding bearing (18) are arranged between the rotor (13) and the fixed shaft (1); The transition metal sleeve (14), the rotor (13), the front sliding bearing (17) and the rear sliding bearing (18) are all parts of the transmission components.

6. The adaptive rotor assembly according to claim 5, characterized in that: It also includes a stator (15), which is arranged in the metal shell (6), and the stator (15) and the rotor (13) are isolated by an isolation cover (8); Along the circumferential direction of the stator (15), there is a first gap (16) between the stator (15) and the isolation cover (8), which is directed from the pump cover (5) to the protrusion (9), and the width of the first gap (16) gradually increases along the radial direction of the stator (15). Furthermore, the maximum width of the first slit (16) is limited to the first width.

7. The adaptive rotor assembly according to claim 1, characterized in that: The buffer rubber (4) is a rubber ring made of silicone rubber, a rubber ring made of nitrile rubber or a rubber ring made of ethylene propylene rubber.

8. An electronic water pump, characterized in that: The adaptive rotor assembly comprises the adaptive rotor assembly according to any one of claims 1 to 7.

9. A new energy vehicle, characterized in that: The adaptive rotor assembly comprises the adaptive rotor assembly according to any one of claims 1 to 7.

10. A new energy vehicle, characterized in that: Including the electronic water pump as claimed in claim 8.

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