CN212838530U - Rotor assembly for electronic water pump - Google Patents

Abstract

The utility model discloses a rotor assembly for an electronic water pump, which comprises a rotating shaft, an isolating sleeve, an end cover and an impeller, wherein the isolating sleeve and the end cover form a shell with a cavity inside; the rotating shaft is rotationally connected with the isolating sleeve; the axial both ends of end cover still are provided with prevents the drunkenness subassembly, prevent that the drunkenness subassembly includes bearing and gasket, the bearing makes the pivot with the end cover is rotated and is connected, and one of them prevents that the gasket of drunkenness subassembly is located between rotor and the bearing, and the gasket of another prevents the drunkenness subassembly is located between impeller and the bearing, two prevent that the bearing of drunkenness subassembly and end cover interference fit. The utility model discloses can restrict the play volume of two directions around the pivot. Avoid the pivot striking spacer sleeve, avoid the damage of spacer sleeve.

Description

Rotor assembly for electronic water pump

Technical Field

The utility model relates to an electronic pump technical field especially relates to a rotor assembly for electronic pump.

Background

When an electronic water pump of an automobile works at a rated point, theoretically, the axial force borne by an impeller is almost zero, the impeller of the water pump is in the middle position, and the impeller of the water pump basically moves forwards (in the direction of the inlet of the impeller) in the working process under the real condition, so that the forward movement of the impeller is controlled by preferentially considering the movement of the impeller in the process of controlling the movement of the impeller, and the backward movement is controlled by adding a gasket at the bottom of an isolation sleeve to limit the backward movement of the impeller. However, the hardness of the gasket and the isolation sleeve is not very high, so that under some complex working conditions, the impeller always moves backwards, the motor shaft always abrades the bottom of the isolation sleeve, and the bottom of the isolation sleeve is abraded after a long time, so that the isolation sleeve leaks water and the motor is damaged.

SUMMERY OF THE UTILITY MODEL

In order to solve the water pump among the prior art can't restrain the impeller forward and backward drunkenness simultaneously, when the drunkenness backward, the motor weares and teares the spacer easily, leads to the technical problem that the spacer leaked, the utility model provides a rotor assembly for electronic water pump solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a rotor assembly for an electronic water pump comprises a rotating shaft, an isolation sleeve, an end cover and an impeller, wherein the isolation sleeve and the end cover form a shell with a cavity inside; the axial both ends of end cover still are provided with anti-channeling subassembly respectively, anti-channeling subassembly includes bearing and gasket, the bearing makes the pivot with the end cover is rotated and is connected, and one of them anti-channeling subassembly's gasket is located between rotor and the bearing, and another anti-channeling subassembly's gasket is located between impeller and the bearing, two anti-channeling subassembly's bearing and end cover interference fit.

Furthermore, the rotating shaft and the isolating sleeve are rotatably connected through a first bearing, and the first bearing is positioned at one end, far away from the impeller, of the rotating shaft.

Preferably, the bearings of the two anti-play assemblies are separately arranged at the two axial ends of the end cover.

Preferably, the bearings of the two anti-play assemblies integrally penetrate through the end cover along the axial direction.

Preferably, in the anti-play assembly adjacent to the impeller, an inner diameter of the bearing is larger than an inner diameter of the bearing in the first bearing and the anti-play assembly adjacent to the rotor.

Furthermore, in the anti-moving assembly close to the impeller, a special-shaped hole is formed in the center of the gasket, and a step matched with the special-shaped hole is formed in the rotating shaft.

Furthermore, in the anti-shifting assembly close to the impeller, a flow guide groove is formed in the axial end face, which is in contact with the bearing, of the gasket, the flow guide groove extends from the outer edge of the gasket to the inner edge of the gasket along a curve, and the curve extending direction of the flow guide groove is opposite to the rotating direction of the impeller.

Preferably, the inner edge of the gasket is enclosed by two opposite arc-shaped surfaces and two opposite flat surfaces.

Furthermore, the section of the diversion trench perpendicular to the extending direction is quadrilateral.

Further, along the extending direction of the diversion trench, the depth of the depression of the diversion trench is gradually reduced, and at the tail end of the extending direction of the diversion trench, the diversion trench is tangent to the axial end face of the gasket.

Furthermore, an elastic component is arranged between the gasket close to the impeller and the impeller.

Further, in the anti-play assembly close to the impeller, an annular groove suitable for installing the elastic component is arranged on the gasket and faces to the axial end face of the impeller.

The utility model has the advantages that:

(1) a rotor assembly for electronic water pump, can restrict the play volume of two directions around the pivot. When the impeller drives the rotating shaft to move forwards, a gasket in the anti-moving assembly positioned behind the end cover impacts a bearing, and the bearing limits the forward moving amount of the impeller and prevents the impeller from impacting a pump shell; when the impeller drives the rotating shaft to move backwards, a gasket in the anti-moving assembly in front of the end cover collides with the bearing, the bearing limits the backward moving amount of the impeller, the rotating shaft is prevented from colliding with the isolation sleeve, and the isolation sleeve is prevented from being damaged.

(2) A rotor assembly for electronic water pump, be close to set up on the gasket of impeller with impeller rotation opposite direction's guiding gutter, when the impeller rotates, when the gasket follows the pivot rotation promptly, rivers can follow the gasket periphery along the guiding gutter and get into in gasket terminal surface or the centre bore to between gasket and the bearing with liquid drainage, increase lubrication between the two.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is an exploded schematic view of an embodiment of a rotor assembly for an electric water pump according to the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of a rotor assembly for an electric water pump according to the present invention;

FIG. 3 is a schematic cross-sectional view of an embodiment of a rotor assembly for an electric water pump according to the present invention;

FIG. 4 is a perspective view of the rotating shaft of the present invention;

fig. 5 is a top view of the second gasket of the present invention;

fig. 6 is a perspective view of the second gasket of the present invention;

FIG. 7 is a top view of the second shim of FIG. 6;

FIG. 8 is a top view of an embodiment of a second gasket of the present invention;

fig. 9 is a perspective view of an embodiment of a second gasket of the present invention.

In the figure, 1, an isolation sleeve, 2, a first bearing, 3, a rotor, 4, a first gasket, 5, a second bearing, 6, an end cover, 7, a third bearing, 8, a second gasket, 801, a diversion trench, 802, a special-shaped hole, 803, an annular groove, 9, an elastic component, 10, an impeller, 11, a fourth bearing, 12, a cavity, 13, a rotating shaft, 1301, a step, 1302 and a thread section.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, the output direction of the rotating shaft 13 is the direction toward the impeller 10, the term "front" means the front of the output direction of the rotating shaft 13, and the term "rear" means the rear of the output direction of the rotating shaft 13.

A rotor assembly for an electronic water pump comprises a rotating shaft 13, an isolation sleeve 1, an end cover 6 and an impeller 10, wherein the isolation sleeve 1 and the end cover 6 form a shell with a cavity 12 inside, a rotor 3 is fixed on the rotating shaft 13, one end of the rotating shaft 13 is rotatably connected with the isolation sleeve 1, the other end of the rotating shaft extends out of the end cover 6 and then is fixedly connected with the impeller 10, and the rotor 3 is positioned in the cavity 12; the axial both ends of end cover 6 still are provided with anti-channeling subassembly respectively, anti-channeling subassembly includes bearing and gasket, and the bearing makes pivot 13 and end cover 6 rotate and is connected, and the gasket of one of them anti-channeling subassembly is located between rotor 3 and the bearing, and the gasket of another anti-channeling subassembly is located between impeller 10 and the bearing. The bearing is in interference fit with the end cover 6, and the bearing and the rotating shaft 13 can be in interference fit or clearance fit.

The rotating shaft 13 is used as a transmission shaft and used for driving the impeller 10 to rotate, one end of the isolation sleeve 1 is closed, the other end of the isolation sleeve is fixedly butted with the end cover 6, a shaft hole suitable for the rotating shaft 13 to penetrate is formed in the end cover 6, the rotor 3 is located in a cavity 12 formed by the isolation sleeve 1 and the end cover 6 in an enclosed mode, a stator coil (not shown) of the automobile electronic water pump is sleeved on the isolation sleeve 1, and under the effect of the stator coil, the rotor 3 rotates to further drive the impeller 10 to rotate, and water supply of the automobile electronic water pump is. The bearing in the anti-channeling component is sleeved on the rotating shaft 13 and is contacted with the circumferential side faces of the rotating shaft 13 and the end cover 6, the gasket in the anti-channeling component is contacted with the axial end face of the bearing, and the rotor 3 and the impeller 10 are respectively abutted against the end face of the bearing through the corresponding gasket.

In the prior art, the impeller 10 is directly installed after the end cover 6 is installed, that is, when the impeller 10 and the rotating shaft 13 move backwards, there is no axial limit relation between the impeller 10 and the end cover 6, and the limitation can only be realized by the contact between the bottom of the rotating shaft 13 and the bottom of the isolation sleeve 1, so that the isolation sleeve 1 (the isolation sleeve 1 is usually made of plastic material) is damaged due to the long-term abrasion of the rotating shaft 13 after a long time.

The utility model discloses a set up respectively in axial the place ahead of end cover 6 and rear and prevent that the drunkenness subassembly makes impeller 10 scurry before with after when scurrying spacing block all be located prevent scurrying on the subassembly, when scurrying behind the impeller 10 promptly, the corresponding bearing of gasket striking in the prevent drunkenness subassembly that is located the place ahead of end cover 6, because the bearing is interference fit with end cover 6, under the restriction of end cover 6, bearing axial fixity, thereby restrain and scurrying behind impeller 10 continuation, avoid the bottom of pivot 13 to contact the bottom of separation sleeve 1, consequently, separation sleeve 1 also can not damage. Similarly, when the impeller 10 moves forward, the gasket in the anti-moving assembly located behind the end cover 6 impacts the corresponding bearing, and the impeller 10 is restrained from continuing to move forward.

Example 1:

as shown in fig. 2, a rotor assembly for an electronic water pump comprises a rotating shaft 13, an isolation sleeve 1, an end cover 6 and an impeller 10, wherein the isolation sleeve 1 and the end cover 6 form a shell with a cavity 12 inside, the rotating shaft 13 is fixed with a rotor 3, one end of the rotating shaft 13 is placed on the isolation sleeve 1, the other end of the rotating shaft extends out of the end cover 6 and then is fixedly connected with the impeller 10, and the rotor 3 is located in the cavity 12; the rotating shaft 13 is rotationally connected with the isolation sleeve 1; anti-moving components are further arranged at two axial ends of the end cover 6 and comprise bearings and gaskets, the bearings enable the rotating shaft 13 to be rotatably connected with the end cover 6, the gasket of one anti-moving component is located between the rotor 3 and the bearings, and the gasket of the other anti-moving component is located between the impeller 10 and the bearings. The bearings are preferably made of graphite material and are generally circular.

As shown in fig. 2, the isolation sleeve 1 is a barrel-shaped structure with an open end, the cavity 12 is located in the isolation sleeve 1, the end cap 6 is detachably sealed at the open end of the isolation sleeve 1, one end of the rotating shaft 13 abuts against the bottom of the isolation sleeve 1, and is rotatably connected with the isolation sleeve 1 through the first bearing 2 at the bottom of the isolation sleeve 1 (the bottom of the isolation sleeve 1 refers to one end of the isolation sleeve 1 away from the impeller 10, that is, the first bearing 2 is located at one end of the rotating shaft 13 away from the impeller 10), the rotor 3 is solid cylindrical steel, the rotor 3 is fixed on the shaft of the rotor 3 and rotates or moves axially with the shaft of the rotor 3, and a threaded section 1302 is arranged at one end of the rotating shaft 13 extending out of the end cap 6 and is used for being in threaded connection with the impeller 10, so that the impeller 10. The anti-channeling subassembly is provided with two sets ofly, is located the axial both ends of end cover 6 respectively, and the subassembly is prevented channeling as first to the anti-channeling subassembly that this embodiment uses to be located 6 backs of end cover, uses the anti-channeling subassembly that is located the 6 the place ahead of end cover to prevent channeling as the second.

In this embodiment, the bearings of the two anti-play assemblies integrally penetrate the end cover 6 in the axial direction, as shown in fig. 2, the two anti-play assemblies share one second bearing 5, the first anti-play assembly is composed of the second bearing 5 and a first gasket 4, two ends of the first gasket 4 are respectively contacted with the end faces of the rotor 3 and the second bearing 5, the first gasket 4 is freely placed on a rotating shaft 13, can also be fixed on the axial end face of the rotor 3, and can also be fixed on the rotating shaft 13, when the impeller 10 moves forward, the first gasket 4 abuts against the left end of the second bearing 5 under the pushing of the rotor 3, and the second bearing 5 prevents the first gasket 4 from moving forward continuously, so as to prevent the impeller 10 from moving forward; the second prevents scurrying the subassembly and comprises second bearing 5 and second gasket 8, the axial both ends of second gasket 8 respectively with the terminal surface contact of impeller 10 and second bearing 5, second gasket 8 can rotate with pivot 13 and be connected, also can with pivot 13 fixed connection, scurry behind impeller 10 when, under impeller 10's promotion, second gasket 8 supports and leans on the right-hand member at second bearing 5, second bearing 5 prevents that second gasket 8 continues the backshift to prevent scurrying behind impeller 10. Since the second bearing 5 is in simultaneous abutting contact with the first spacer 4 and the second spacer 8, the second bearing 5 needs to axially penetrate the end cap 6.

Preferably, in the anti-channeling assembly near the impeller 10, a shaped hole 802 is provided at the center of the spacer, and a step 1301 for fitting the shaped hole 802 is provided on the rotation shaft 13. That is, the second gasket 8 is preferably fixedly connected to the rotating shaft 13 in the circumferential direction, as shown in fig. 4 and 5, a kidney-shaped hole is formed in the center of the gasket, the kidney-shaped hole is a hole surrounded by two opposite arc-shaped surfaces and two opposite planes, a step 1301 is arranged at one end of the rotating shaft 13 close to the threaded section 1302, and the step 1301 is used for being attached to the plane in the special-shaped hole 802 to limit the relative rotation between the second gasket 8 and the rotating shaft 13.

Example 2:

this example differs from example 1 in that: the bearings of the two anti-play assemblies are separately arranged at the two axial ends of the end cover 6. The present embodiment also takes the tamper-proof component located in front of the end cover 6 as the first tamper-proof component, and the tamper-proof component located behind the end cover 6 as the second tamper-proof component. As shown in fig. 1 and 3, the first anti-moving assembly is composed of a third bearing 7 and a first gasket 4, the third bearing 7 is disposed near the left end of the end cover 6, both ends of the first gasket 4 are in contact with the end surfaces of the rotor 3 and the third bearing 7, respectively, the second anti-moving assembly is composed of a fourth bearing 11 and a second gasket 8, the fourth bearing 11 is disposed near the right end of the end cover 6, and both ends of the second gasket 8 are in contact with the end surfaces of the impeller 10 and the fourth bearing 11, respectively.

In embodiment 1, when the second bearing 5 is subjected to a forward or backward thrust, only the axial movement of the second bearing 5 can be restrained by the shearing strength of the second bearing 5 itself, the strength requirement on the second bearing 5 is high, in this embodiment, the end cap 6 has a raised shoulder protruding inwards, both the right end of the third bearing 7 and the left end of the fourth bearing 11 abut against the raised shoulder, when the first gasket 4 presses the left end of the third bearing 7, the raised shoulder restricts forward movement of the third bearing 7, and the third bearing 7 itself does not need to bear a shearing force, and similarly, when the second gasket 8 presses the right end of the fourth bearing 11, the raised shoulder restricts backward movement of the fourth bearing 11.

Preferably, in the anti-play assembly adjacent to the impeller 10, the inner diameter of the bearing is larger than the inner diameter of the bearings in the first bearing 2 and the anti-play assembly adjacent to the rotor 3. That is, the internal diameter of fourth bearing 11 is greater than the internal diameter of first bearing 2 and third bearing 7, and the internal diameter of first bearing 2 and third bearing 7 matches with the external diameter of pivot 13, avoids pivot 13 to rock, and for avoiding crossing the location, the internal diameter of fourth pivot 13 is greater than the internal diameter of first bearing 2 and third bearing 7, prevents in the assembling process, leads to impeller 10 card to die because the position degree problem of part.

Example 3:

in the anti-channeling assembly close to the impeller 10 according to embodiment 1 or embodiment 2, the axial end surface of the gasket contacting the bearing is provided with a guide groove 801, the guide groove 801 extends from the outer edge of the gasket to the inner edge of the gasket in a curved direction, and the curved direction of the guide groove 801 is opposite to the rotation direction of the impeller 10.

As shown in fig. 6 and 7, three flow guide grooves 801 are formed in an axial end face of the second gasket 8, which is in contact with the bearing, the flow guide grooves 801 are circumferentially arrayed on the end face of the second gasket 8, the impeller 10 rotates counterclockwise, the flow guide grooves 801 extend approximately clockwise, when the impeller 10 rotates, the second gasket 8 rotates along with the rotating shaft 13, water flow can enter the central hole of the gasket from the outer edge of the gasket along the flow guide grooves 801, and the flow guide grooves 801 are arranged to guide liquid to a circumferential contact surface between the rotating shaft 13 and the second gasket 8, so as to increase lubrication between the rotating shaft 13 and the second gasket 8. The number of the diversion grooves 801 is determined according to the requirement, for example, six diversion grooves 801 are arranged on the end surface of the second gasket 8 shown in fig. 8, and at the central hole of the second gasket 8 of the final cutting knife of the diversion grooves 801 shown in fig. 8, only the water flow is guided to the central hole.

More specifically, the cross section of the diversion trench 801 perpendicular to the extending direction is quadrilateral, that is, the water flow enters the second gasket 8 in the form of a quadrilateral cross section, and in the present embodiment, the water flow enters the second gasket 8 in the form of a rectangular cross section.

Example 4:

on the basis of embodiment 3, along the extending direction of the guiding groove 801, the recessed depth of the guiding groove 801 gradually decreases, and at the end of the extending direction of the guiding groove 801, the guiding groove 801 is tangent to the axial end face of the gasket. As shown in fig. 6, the depth of the flow guide groove 801 decreases gradually from the outer edge of the second gasket 8 to the inner edge of the second gasket 8, and at the end of the flow guide groove 801, the flow guide groove 801 is tangent to the end surface of the second gasket 8, and when the impeller 10 rotates, water flow can enter the end surface of the second gasket 8 and the central hole of the second gasket 8 simultaneously from the outer edge of the second gasket 8 along the flow guide groove 801.

The end of the diversion trench 801 shown in fig. 6 is tangent to the second gasket 8, and is also cut into the central hole of the second gasket 8, on the basis of embodiment 1, the liquid is guided between the second gasket 8 and the axial end face of the second bearing 5, so that the lubrication between the two can be increased, and the liquid is guided between the second gasket 8 and the circumferential side face of the rotating shaft 13, so that the lubrication between the two can be increased; on the basis of embodiment 2, the lubrication between the second gasket 8 and the axial end face of the fourth bearing 11 can be increased by guiding the liquid, and the lubrication between the second gasket 8 and the circumferential side face of the rotating shaft 13 can be increased by guiding the liquid.

Example 5:

in addition to the above embodiment, the elastic member 9 is provided between the impeller 10 and the spacer adjacent to the impeller 10. As shown in fig. 1 to 3, an elastic member 9 is disposed between the impeller 10 and the second gasket 8, and after the assembly, the elastic member 9 has a certain amount of deformation, so that the second gasket 8 can be fixed on the step 1301, the second gasket 8 is prevented from moving axially, and a certain buffer effect is provided for friction between the second gasket 8 and the bearing. The elastic member 9 may be a corrugated spring washer (shown in fig. 1) or a light spring.

The elastic member 9 may be fixed by, but not limited to, the following means: in said anti-tamper assembly close to the impeller 10, the gasket is provided, on its axial end face facing the impeller 10, with an annular groove 803 suitable for mounting the elastic means 9. As shown in fig. 9, the second gasket 8 is provided with an annular groove 803 on an axial end surface facing the impeller 10, the elastic member 9 is placed in the annular groove 803, and the annular groove 803 and the guide groove 801 are respectively located at both ends of the second gasket 8.

In the description of the present invention, it is to be understood that the terms "central", "front", "rear", "left", "right", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (12)

1. A rotor assembly for an electronic water pump, comprising: the impeller structure comprises a rotating shaft (13), an isolating sleeve (1), an end cover (6) and an impeller (10), wherein the isolating sleeve (1) and the end cover (6) form a shell with a cavity (12) inside, a rotor (3) is fixed on the rotating shaft (13), one end of the rotating shaft (13) is rotatably connected with the isolating sleeve (1), the other end of the rotating shaft extends out of the end cover (6) and then is fixedly connected with the impeller (10), and the rotor (3) is located in the cavity (12);

the axial both ends of end cover (6) still are provided with anti-channeling subassembly respectively, anti-channeling subassembly includes bearing and gasket, the bearing makes pivot (13) with end cover (6) rotate the connection, and one of them anti-channeling subassembly's gasket is located between rotor (3) and the bearing, and another anti-channeling subassembly's gasket is located between impeller (10) and the bearing, two the bearing and end cover (6) interference fit of anti-channeling subassembly.

2. The rotor assembly for an electric water pump as claimed in claim 1, wherein: the rotating shaft (13) is rotatably connected with the isolating sleeve (1) through a first bearing (2), and the first bearing (2) is located at one end, far away from the impeller (10), of the rotating shaft (13).

3. The rotor assembly for an electric water pump of claim 2, wherein: and the bearings of the two anti-moving assemblies are separately arranged at the two axial ends of the end cover (6).

4. The rotor assembly for an electric water pump of claim 2, wherein: and the bearings of the two anti-moving components integrally penetrate through the end cover (6) along the axial direction.

5. The rotor assembly for an electric water pump of claim 3, wherein: in the anti-play assembly close to the impeller (10), the inner diameter of the bearing is larger than the inner diameter of the bearings in the first bearing (2) and the anti-play assembly close to the rotor (3).

6. The rotor assembly for an electric water pump as claimed in claim 1, wherein: in the anti-channeling subassembly near impeller (10), the center of gasket is provided with dysmorphism hole (802), be provided with on pivot (13) with dysmorphism hole (802) complex step (1301).

7. The rotor assembly for an electric water pump of claim 6, wherein: in the anti-shifting assembly close to the impeller (10), a guide groove (801) is arranged on the axial end face, which is in contact with the bearing, of the gasket, the guide groove (801) extends from the outer edge of the gasket to the inner edge of the gasket along a curve direction, and the curve extending direction of the guide groove (801) is opposite to the rotating direction of the impeller (10).

8. The rotor assembly for an electric water pump of claim 7, wherein: the inner edge of the gasket is surrounded by two opposite arc-shaped surfaces and two opposite planes.

9. The rotor assembly for an electric water pump of claim 7, wherein: the section of the diversion trench (801) perpendicular to the extending direction is quadrilateral.

10. The rotor assembly for an electric water pump of claim 7, wherein: along the extending direction of the guide groove (801), the concave depth of the guide groove (801) is gradually reduced, and at the tail end of the extending direction of the guide groove (801), the guide groove (801) is tangent to the axial end face of the gasket.

11. The rotor assembly for an electric water pump of claim 6, wherein: an elastic component (9) is arranged between the gasket close to the impeller (10) and the impeller (10).

12. The rotor assembly for an electric water pump of claim 11, wherein: in the anti-play assembly close to the impeller (10), an axial end face of the gasket facing the impeller (10) is provided with an annular groove (803) adapted to receive the elastic member (9).

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