CN217849129U - Rotor structure and electronic water pump using same - Google Patents

Abstract

The utility model discloses a rotor structure and use this rotor structure's electronic water pump, include: the protective sleeve comprises a ceramic rotating shaft, a rotor assembly and a protective sleeve, wherein the rotor assembly is sleeved outside the ceramic rotating shaft; the rotor assembly comprises a shaft sleeve sleeved on the ceramic rotating shaft, a rotor core sleeved outside the ceramic rotating shaft sleeve, and a cylindrical magnetic steel body positioned on the circumferential outer side of the rotor core; the axial length of the shaft sleeve is greater than that of the rotor core and the magnetic steel sleeve, so that two shaft ends of the shaft sleeve are protruded from the rotor core and the magnetic steel sleeve; the protecting sleeve is in sealing fit with the shaft sleeve so as to seal the rotor iron core and the magnetic steel sleeve in the protecting sleeve. The utility model discloses can compromise the convenience of assembly and prolong overall structure's life.

Description

Rotor structure and electronic water pump using same

Technical Field

The utility model relates to an electronic water pump technical field especially relates to a rotor structure and use this rotor structure's electronic water pump.

Background

Along with the continuous increase of the power of the existing electronic water pump, a series of problems such as the shaft system abrasion of the motor and the like also follow. The rotor structure that uses usually among the prior art is motor shaft and the carborundum bearing cooperation that adopts stainless steel material, and the rotor of this kind of structure is in water pump work operation, and motor rotor drives and is difficult to avoid when the motor shaft rotates can and the bearing between the looks mutual friction to along with wearing and tearing between the two are bigger and bigger, finally leads to the motor shaft because of wearing and tearing attenuate, its internal diameter with bearing complex shaft hole also is relative increase, thereby lead to electronic water pump's wholeness can descend, and then influence electronic water pump's life.

In addition, under the influence of aqueous medium, the gap that the motor shaft matches and connects with the stainless steel sleeve also has the rust to generate in long-time use to influence the normal use of electronic pump.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide a rotor structure to solve the problem of prolonging the service life of the overall structure.

A second object of the present invention is to provide an electronic water pump to solve the problem of prolonging the service life of the overall structure.

The utility model discloses a rotor structure is realized like this:

a rotor structure comprising: the protective sleeve comprises a ceramic rotating shaft, a rotor assembly and a protective sleeve, wherein the rotor assembly is sleeved outside the ceramic rotating shaft; wherein

The rotor assembly comprises a shaft sleeve sleeved on the ceramic rotating shaft, a rotor core sleeved outside the ceramic rotating shaft sleeve, and a cylindrical magnetic steel body positioned on the circumferential outer side of the rotor core; and

the axial length of the shaft sleeve is greater than that of the rotor core and the magnetic steel sleeve, so that two shaft ends of the shaft sleeve are protruded from the rotor core and the magnetic steel sleeve;

the protecting sleeve is in sealing fit with the shaft sleeve so as to seal the rotor iron core and the magnetic steel sleeve in the protecting sleeve.

In an optional embodiment of the present invention, the shaft sleeve protrudes from both ends of the rotor core and is fastened and matched with the ceramic rotating shaft through a screw.

In an optional embodiment of the present invention, a pair of threaded holes for receiving screws are provided on the side walls of the shaft sleeve protruding from the two ends of the rotor core;

the screw is suitable for being in fastening fit with the threaded hole so as to abut against the outer wall of the ceramic rotating shaft.

In an alternative embodiment of the present invention, the protective sleeve includes a pair of axial end sleeves for covering the lateral end sleeve on the outer side of the circumferential direction of the magnetic steel sleeve and adapted to be welded to both axial ends of the lateral end sleeve respectively.

In an optional embodiment of the present invention, an annular flange folded along the axial direction is integrally formed at the circumferential edge of the shaft end collar; and

the annular flanging is suitable for being embedded into the side end sleeve.

In an alternative embodiment of the invention, the circumferential edge of the shaft end collar is adapted to be welded to the side end sleeve to provide a sealing engagement of the circumferential edge of the shaft end collar with the circumferential inner wall of the side end sleeve.

In an optional embodiment of the present invention, the shaft end collar is provided with an opening suitable for the shaft sleeve to pass through; and

and an annular folded edge which is folded towards one side of the side end sleeve along the axial direction is integrally formed at the edge of the hole with the hole.

In an alternative embodiment of the present invention, the opening is adapted to be welded to the shaft sleeve such that a circumferential edge of the opening sealingly engages a circumferential outer wall of the shaft sleeve.

The utility model discloses an electronic pump is realized like this:

an electronic water pump comprising: the rotor structure and the impeller are connected with one shaft end of the ceramic rotating shaft of the rotor structure in a matching mode.

In an optional embodiment of the present invention, a flat groove extending along an axial direction of the ceramic rotating shaft is formed on a side wall of the shaft end portion of the ceramic rotating shaft adapting impeller; and

the shaft end part of the ceramic rotating shaft matched and connected with the impeller is also formed with a clamp spring groove which is distributed along the circumferential direction of the ceramic rotating shaft and is communicated with the flat groove.

By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a rotor structure and use this rotor structure's electronic water pump has adopted the ceramic pivot, and the motor shaft that this kind of material was made can not produce wearing and tearing and influence its and the normal cooperation effect of bearing under the cooperation of long-term use in-process and bearing to can effectively guarantee the ceramic pivot structural stability under the long-term service behavior and prolong its holistic life.

Furthermore, the utility model discloses a shaft sleeve forms the partition in holistic electronic water pump use dry district and wet district, and wherein dry district is used for holding rotor core and magnetic steel bushing, and wet district then is used for holding the ceramic pivot, plays the water proof protection to rotor core and magnetic steel bushing under the prerequisite of guaranteeing whole electronic water pump's normal operating from this.

In addition, the lag and the sealed joining of axle sleeve join in marriage and be used for sealing rotor core and magnetic steel cover in the lag, under this structure, can effectively avoid the rust problem that the junction that forms between lag and the motor shaft among the prior art appears because of using for a long time.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a rotor structure of the present invention;

fig. 2 is a schematic perspective view of the rotor structure of the present invention;

fig. 3 is a schematic structural view of a ceramic rotating shaft of the rotor structure of the present invention;

fig. 4 is a schematic structural view of a shaft sleeve of a rotor structure according to the present invention;

fig. 5 is a schematic view of the matching structure of the shaft sleeve and the ceramic rotating shaft of the rotor structure of the present invention;

FIG. 6 is a schematic view of the partial matching structure of the shaft sleeve and the ceramic rotating shaft of the rotor structure of the present invention

Fig. 7 is a schematic structural view of a shaft end collar of the rotor structure of the present invention;

fig. 8 is a schematic structural view of the side end sleeve of the rotor structure of the present invention.

In the figure: the rotor comprises a ceramic rotating shaft 1, a flat groove 11, a clamp spring groove 12, a protective sleeve 2, a side end sleeve 21, a shaft end lantern ring 22, an opening 23, an annular flanging 24, an annular flanging 25, a shaft sleeve 3, a rotor iron core 4, a magnetic steel sleeve 5, a screw 6 and a threaded hole 7.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

Example 1:

referring to fig. 1 to 8, the present embodiment provides a rotor structure, including: the rotor assembly comprises a ceramic rotating shaft 1, a rotor assembly sleeved outside the ceramic rotating shaft 1 and a protective sleeve 2 coated outside the rotor assembly; the rotor assembly comprises a shaft sleeve 3 sleeved on the ceramic rotating shaft 1, a rotor core 4 sleeved outside the ceramic rotating shaft 1 and a cylindrical magnetic steel body located on the circumferential outer side of the rotor core 4. The rotor core 4 is formed by stacking a plurality of rotor sheets.

Based on the above structure, the shaft sleeve 3 in the rotor structure is used to protect the ceramic rotating shaft 1 and prevent the sealing component in the rotor structure from wearing the ceramic rotating shaft 1, so its material uses stainless steel material to be tightly matched with the ceramic rotating shaft 1, the two will not rust in the water medium, and the problem that the ceramic rotating shaft 1 can not be directly welded with the rotor core 4 can also be solved by using the shaft sleeve 3 made of stainless steel material.

The motor shaft is used as a part for bearing the rotating part of the motor, the torque is transmitted to a dragged machine part from the motor, the strength and the matching precision of the motor shaft directly determine whether the motor can reliably run under the normal condition, and the hardness of the ceramic is very high, so that the strength of the ceramic rotating shaft 1 in the using process can be effectively ensured. In addition, the outer surface of the ceramic rotating shaft 1 is polished in the using process, so that the surface smoothness is good, the friction coefficient is low, the ceramic rotating shaft can still be normally used even under severe using conditions, and the service life can be greatly prolonged. In addition, compared with a metal rotating shaft, the ceramic rotating shaft 1 has the advantage that the material cost is greatly reduced, so that the production cost of the whole rotor structure can be effectively reduced.

Furthermore, the axial length of the shaft sleeve 3 in this embodiment is greater than the rotor core 4 and the magnetic steel sleeve 5 so that both shaft ends of the shaft sleeve 3 protrude from the rotor core 4 and the magnetic steel sleeve 5; on the basis of the structure, the protective sleeve 2 can be directly matched with the shaft sleeve 3 in a sealing mode to seal the rotor iron core 4 and the magnetic steel sleeve 5 in the protective sleeve 2. That is to say, in the present embodiment, the shaft sleeve 3 is used to form a separation between a dry area and a wet area in the use process of the integral electronic water pump, wherein the dry area is used to accommodate the rotor core 4 and the magnetic steel sleeve 5, and the wet area is used to accommodate the ceramic rotating shaft 1, so as to ensure the waterproof protection of the rotor core 4 and the magnetic steel sleeve 5 under the premise of ensuring the normal operation of the integral electronic water pump.

For the fixation between the bushing 3 and the ceramic rotating shaft 1, the scheme adopted by the embodiment is as follows:

the shaft sleeve 3 protrudes from two ends of the rotor core 4 and is respectively fastened and matched with the ceramic rotating shaft 1 through screws 6. Specifically, a pair of threaded holes 7 for matching screws 6 are formed in the side walls of the shaft sleeve 3 protruding from the two ends of the rotor core 4; and the screw 6 is adapted to be in tight fit with the threaded hole 7 to abut against the outer wall of the ceramic rotary shaft 1.

The protective sleeve 2 will be described next, and the material thereof is the first, for example, the protective sleeve 2 is made of stainless steel material in an optional case.

Secondly, the structure of the protecting jacket 2, the protecting jacket 2 comprises a side end sleeve 21 used for covering the circumferential outer side of the magnetic steel sleeve 5 and a pair of shaft end lantern rings 22 suitable for being respectively welded with the two axial ends of the side end sleeve 21. A pair of axial end collars 22 may here be sealingly coupled to the two axial ends of the side end sleeves 21, respectively.

In addition to the above structure, in an alternative embodiment, the shaft end collar 22 may be sealingly engaged with the two shaft ends of the side end sleeve 21 by, for example, but not limited to, a penetration weld. And the shaft end collar 22 and the shaft sleeve 3 are sealingly engaged by, for example and without limitation, a penetration weld.

The penetration welding has relatively low welding energy, generates small heat, and has little or no damage to the magnetic steel sleeve 5, the rotor core 4 and other parts in the protective sleeve 2. However, the welding mode has high requirement on the matching precision of parts, needs tight fit and cannot have gaps. This requires a high dimensional fit of the shaft end collar 22 to the shaft sleeve 3. In order to protect the magnetic steel sleeve 5 from failure, the following structural design is made in the present embodiment:

the circumferential edge of the shaft end lantern ring 22 is integrally formed with an annular flange 24 which is turned over along the axial direction; and the annular flange 24 is adapted to be fitted into the side end sleeve 21. Furthermore, the shaft end lantern ring 22 is provided with an opening 23 which is suitable for the shaft sleeve 3 to pass through; and an annular flange 25 folded toward the side end sleeve 21 in the axial direction is integrally formed at the hole edge of the opening 23. Here, the annular flange 24 and the annular flange 25 are folded in the same direction with respect to the shaft end collar 22. And the opening 23 is adapted to be welded to the sleeve 3 such that the peripheral edge of the opening 23 sealingly engages the peripheral outer wall of the sleeve 3. The axial heights of the annular flange 24 and the annular flange 25 may be both designed to be 2mm, or there may be a slight difference between the axial heights of the two, and this embodiment is not limited in any way. The annular flanging 24 and the annular flanging 25 are designed to be mainly used for penetration welding conveniently, the position of the magnetic steel sleeve 5 can be avoided, and the damage of local high temperature generated by welding energy to the magnetic steel sleeve 5 is effectively reduced, so that the overall performance of the rotor structure is influenced.

In summary, for the rotor structure of this embodiment, in the specific processing process of the rotor structure, the shaft sleeve 3 is firstly pressed into the rotor core 4, and then the magnetic steel is adhered to the surface of the rotor core 4 by the magnetic steel adhesive to form the cylindrical magnetic steel sleeve. Finally, the whole rotor iron core 4 and the shaft sleeve 3 are welded through the protective sleeve 2, the shaft sleeve 3 and the ceramic rotating shaft 1 are connected through screws in the last step, the whole rotor structure is convenient to assemble, stable in structure and long in service life.

Example 2:

on the basis of the rotor structure of embodiment 1, the present embodiment provides an electronic water pump including: the rotor structure of embodiment 1, and an impeller that is connected to one of the shaft ends of the ceramic rotary shaft 1 of the rotor structure in a mating manner.

Because the ceramic rotating shaft 1 adopted by the embodiment can not be made into a thread structure and is directly connected with the impeller, in order to enable the ceramic rotating shaft 1 to be better connected with the impeller, a flat groove 11 extending along the axial direction of the ceramic rotating shaft 1 is formed on the side wall of the shaft end part of the ceramic rotating shaft 1 matched and connected with the impeller, and the flat groove 11 is convenient for being clamped and matched with the impeller.

In addition, in order to limit the up-and-down movement of the impeller on the ceramic rotating shaft 1, the shaft end portion of the ceramic rotating shaft 1 connected with the impeller is further formed with snap spring grooves 12 which are distributed along the circumferential direction of the ceramic rotating shaft 1 and are communicated with the flat grooves 11. Therefore, the clamping spring is clamped in the clamping spring groove 12, and the limiting effect on the impeller can be achieved from one axial end of the impeller.

The above embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature may be over, above or on the second feature including the first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims (10)

1. A rotor structure, comprising: the protective sleeve comprises a ceramic rotating shaft, a rotor assembly sleeved outside the ceramic rotating shaft and a protective sleeve covering the outer side of the rotor assembly; wherein

The rotor assembly comprises a shaft sleeve sleeved on the ceramic rotating shaft, a rotor core sleeved outside the ceramic rotating shaft sleeve, and a cylindrical magnetic steel body positioned on the circumferential outer side of the rotor core; and

the axial length of the shaft sleeve is greater than that of the rotor core and the magnetic steel sleeve, so that two shaft ends of the shaft sleeve are protruded from the rotor core and the magnetic steel sleeve;

the protecting sleeve is in sealing fit with the shaft sleeve so as to seal the rotor iron core and the magnetic steel sleeve in the protecting sleeve.

2. The rotor structure of claim 1, wherein the shaft sleeve protrudes from both ends of the rotor core and is tightly engaged with the ceramic rotating shaft by screws, respectively.

3. The rotor structure according to claim 2, wherein a pair of threaded holes for receiving screws are formed in the side walls of the shaft sleeve protruding from the two ends of the rotor core;

the screw is suitable for being in fastening fit with the threaded hole so as to abut against the outer wall of the ceramic rotating shaft.

4. The rotor structure of claim 1, wherein the protective sleeve comprises a side end sleeve for covering a circumferential outer side of the magnetic steel sleeve and a pair of shaft end collars adapted to be welded to axial ends of the side end sleeve, respectively.

5. The rotor structure according to claim 4, wherein the circumferential edge of the shaft end collar is integrally formed with an annular flange turned in the axial direction; and

the annular flanging is suitable for being embedded into the side end sleeve.

6. The rotor structure of claim 5, wherein the circumferential edge of the axial end collar is adapted for welded connection with a side end sleeve to sealingly engage the circumferential edge of the axial end collar with the circumferential inner wall of the side end sleeve.

7. The rotor structure according to any one of claims 4 to 6, wherein the shaft end collar is provided with an opening suitable for the shaft sleeve to pass through; and

and an annular folded edge which is folded towards one side of the side end sleeve along the axial direction is integrally formed at the edge of the hole with the hole.

8. A rotor structure according to claim 7, wherein the aperture is adapted to be welded to the boss such that a peripheral edge of the aperture sealingly engages a peripheral outer wall of the boss.

9. An electronic water pump, comprising: a rotor structure as claimed in any one of claims 1 to 8, and an impeller matingly connected to one of the axial ends of the ceramic rotor shaft of the rotor structure.

10. The electronic water pump as claimed in claim 9, wherein a flat groove extending in the axial direction of the ceramic rotary shaft is formed on a side wall of the shaft end portion of the ceramic rotary shaft coupled with the impeller; and

the shaft end part of the ceramic rotating shaft matched and connected with the impeller is also formed with a clamp spring groove which is distributed along the circumferential direction of the ceramic rotating shaft and is communicated with the flat groove.

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