CN215058410U

CN215058410U - Sealing structure of electronic water pump isolation sleeve

Info

Publication number: CN215058410U
Application number: CN202120708280.7U
Authority: CN
Inventors: 胡倩澜; 周志荣; 杨康生; 刘赣川; 韩明书; 何照良; 张志敏
Original assignee: Shenzhen Southern Dare Automotive Electronic Co Ltd
Current assignee: Shenzhen Southern Dare Automotive Electronic Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-12-07
Anticipated expiration: 2031-04-07

Abstract

The embodiment of the utility model discloses a seal structure of electronic pump spacer sleeve, it includes: the sealing device comprises a rear cover, an isolation sleeve and a sealing element, wherein a connecting groove is formed in the rear cover, the isolation sleeve is inserted in the connecting groove, and the sealing element is pressed between the groove wall of the connecting groove and the outer wall of the isolation sleeve. Compared with the prior art, the sealing structure of the electronic water pump isolation sleeve of the embodiment adopts the isolation sleeve as the sealing groove mounting structure, adopts the O-shaped sealing ring for sealing, and adopts the cover surface to be the radial sealing structure after the isolation sleeve is matched. The isolation sleeve die can be suitable for various occasions from low pressure to high pressure, is convenient to install, high in reliability, small in relation with other structures, and capable of simplifying the isolation sleeve die.

Description

Sealing structure of electronic water pump isolation sleeve

Technical Field

The utility model relates to an electric pump seals technical field, especially relates to a seal structure of electronic pump separation sleeve.

Background

In recent years, brushless electronic cooling water pumps of automobiles are gradually applied to commercial vehicles from passenger vehicles, the power structures of the water pumps are gradually increased, the sizes of stators are gradually increased, and the water pressure of the water pumps is also increased, so that the requirements on the structures of the water pumps are also stricter and stricter. Especially after water pump power increases, the problem that generates heat of motor is also more and more outstanding, and inner rotor water-cooling heat dissipation is indispensable, and the inner rotor water cavity that brings thereupon also more and more important.

As shown in figures 1 and 2, the sealing scheme is a radial seal, the back cover 1 is provided with a seal groove 11 structure, the inner circular surface of the isolation sleeve 2 is used for pressing the seal ring 3 for sealing, and the sealing effect is better when the water pressure is lower. The sealing structure in the form can deform the isolation sleeve when the water pressure is high, and water directly rushes out of the isolation sleeve and leaks into the stator cavity, so that the sealing is invalid.

Fig. 3 and 4 show the axial end face seal, the sealing scheme is that the flange face of the rear cover flange 1 presses the sealing ring 3, the locking force of a screw is used for providing a certain compression amount for the sealing ring, and the sealing effect is better when the diameter of the flange face is constant. When the diameter of the stator is large, the diameter of the flange of the isolation sleeve 2 is also large, the axial rigidity of the isolation sleeve 2 is reduced, the isolation sleeve is easy to deform and is in contact with a motor rotor, and therefore the isolation sleeve is only used under the condition of small power with limited stator size. In addition, the structure has high requirements on the balance of the locking force of the fastener, and if the circumferential locking force is unbalanced, the sealing failure can be caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art, provide a seal structure of electronic pump spacer to solve the technical problem of the easy sealed inefficacy of current electronic pump.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an embodiment of the utility model provides a seal structure of electronic pump spacer, it includes: the sealing device comprises a rear cover, an isolation sleeve and a sealing element, wherein a connecting groove is formed in the rear cover, the isolation sleeve is inserted in the connecting groove, and the sealing element is pressed between the groove wall of the connecting groove and the outer wall of the isolation sleeve.

The outer wall of the isolation sleeve is also provided with a raised annular wall, and an installation position for arranging the sealing element is formed between the annular wall and the groove wall of the connecting groove.

And a reserved gap is arranged between the annular wall and the groove wall of the connecting groove.

The cover surface of the rear cover is provided with a protruding tubular part, and the tube cavity of the tubular part forms the connecting groove.

Wherein, the inner wall of tubular part still is equipped with an annular platform, the sealing member set up in annular platform with between the annular wall.

Wherein, the bottom of tubular part still is equipped with a ring channel of recess, the tip of spacer sleeve extends to ring channel department.

And a reserved space is also arranged between the groove wall of the annular groove and the outer wall of the isolation sleeve.

Preferably, the sealing element is a sealing ring.

The water pump comprises a water pump shell, a rear cover is connected to the rear end portion of the water pump shell, and the other end of the isolation sleeve is connected to the front end portion of the water pump shell in a sealing mode.

The cooling device comprises a rotating shaft and an impeller, wherein the rear end of the rotating shaft is rotatably connected with the rear cover, the front end of the rotating shaft penetrates through the water pump shell, the impeller is connected with the front end of the rotating shaft, a liquid inlet hole is further formed in the water pump shell, a liquid outlet channel is formed in the rotating shaft, and the liquid inlet hole, the cavity of the isolation sleeve and the liquid outlet channel are sequentially communicated to form a cooling liquid channel.

Compared with the prior art, the sealing structure of the electronic water pump isolation sleeve of the embodiment adopts the isolation sleeve as the sealing groove mounting structure, adopts the O-shaped sealing ring for sealing, and adopts the cover surface to be the radial sealing structure after the isolation sleeve is matched. The design does not adopt a conventional U-shaped sealing groove, but adopts the form of respective L-shaped grooves of the isolating sleeve and the rear cover, so that the die is simplified, and the size of the mounting surface is easy to control. And the structure can control the compression amount of the O-shaped sealing ring along with the increase of the water pressure, so that the sealing structure is more reliable under the condition of high water pressure. Besides, the structure is not flange face sealing, is not greatly related to the locking force of the fastening piece on the flange, and does not have great influence on the sealing effect even if the locking force of the fastening piece is not balanced in the circumferential direction. The isolation sleeve die can be suitable for various occasions from low voltage to high voltage, is convenient to install, high in reliability, small in relation with other structures, and capable of simplifying the isolation sleeve die.

The foregoing is a summary of the present invention, and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments, which is provided for the purpose of illustration and understanding of the present invention.

Drawings

Fig. 1 and 2 show a first sealing embodiment of an electronic water pump in the prior art.

Fig. 3 and 4 show a second sealing embodiment of an electronic water pump in the prior art.

Fig. 5 is the overall structure schematic diagram of the electronic water pump according to the embodiment of the present invention.

Fig. 6 is an overall cross-sectional view of the electronic water pump according to the embodiment of the present invention.

Fig. 7 is a partially enlarged schematic view of fig. 6.

Fig. 8 is a schematic structural view of a part of the isolation sleeve and the sealing member according to the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or 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 skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Referring to fig. 5 to 8, the present embodiment discloses a sealing structure of an electronic water pump spacer, including: the sealing structure comprises a rear cover 4, an isolation sleeve 5 and a sealing element 6, wherein a connecting groove is formed in the rear cover 4, the isolation sleeve 6 is inserted into the connecting groove, and the sealing element 5 is pressed between the groove wall of the connecting groove and the outer wall of the isolation sleeve 5.

As shown in fig. 7, the outer wall of the isolation sleeve 5 is further provided with a raised annular wall 51, and a mounting position for arranging the sealing element 6 is formed between the annular wall 51 and the groove wall of the connecting groove.

Wherein a reserved gap 7 is arranged between the annular wall 51 and the groove wall of the connecting groove.

More specifically, the cover surface of the rear cover 4 is provided with a projecting tubular portion 41, and the lumen of the tubular portion 41 forms the connecting groove.

Wherein, the inner wall of the tubular part 41 is further provided with an annular table 42, and the sealing element 6 is arranged between the annular table 42 and the annular wall 51.

Further, the bottom of the tubular part 41 is further concavely provided with an annular groove 43, the end of the isolation sleeve 5 extends to the annular groove 43, and a reserved space 8 is further arranged between the groove wall of the annular groove 43 and the outer wall of the isolation sleeve 5. That is, when the isolation sleeve 5 is connected to the rear cover 4, the annular wall 51 abuts against the inner wall of the tubular part 41, the outer wall of the rear end of the isolation sleeve 5 abuts against the groove side wall of the annular groove 43, and a reserved movable gap is arranged at the abutting position, so that the isolation sleeve 5 and the sealing element 6 are conveniently assembled and connected with the rear cover 4, when the pressure in the isolation sleeve 5 is increased, the end part of the isolation sleeve 5 is pressed and deformed, the sealing element 6 is further extruded, and the sealing performance is further improved.

In this embodiment, the sealing member 6 is a sealing ring, and the diameter of the sealing ring is slightly larger than the distance between the isolation sleeve 5 and the tubular portion of the rear cover 4, so that the sealing ring is always in a squeezed state.

Referring to fig. 5 and 6 again, the water pump further includes a water pump housing 1, the rear cover 2 is connected to a rear end portion of the water pump housing 1, and the other end of the spacer 5 is hermetically connected to a front end portion of the water pump housing 1.

This electronic water pump still includes pivot 3 and impeller 2, the back tip of pivot 3 rotate connect in back lid 4, and the preceding tip of pivot 3 wears to locate water pump shell 1, impeller 2 connect in the front end of pivot 3, still be equipped with feed liquor hole 11 on the water pump shell 1, be equipped with liquid outlet channel 31 in the pivot 3, feed liquor hole 11, the cavity of spacer 5 and liquid outlet channel 31 communicate in proper order to form the coolant liquid passageway.

A stator 10 is arranged in a cavity of the water pump shell 1, a rotor 9 is connected to the rotating shaft 3, the stator 10 and the rotor 9 are separated by an isolating sleeve 5, and cooling liquid can only flow in the cavity of the rotor 9.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. The utility model provides a seal structure of electronic water pump spacer, its characterized in that includes: the sealing device comprises a rear cover, an isolation sleeve and a sealing element, wherein a connecting groove is formed in the rear cover, the isolation sleeve is inserted in the connecting groove, and the sealing element is pressed between the groove wall of the connecting groove and the outer wall of the isolation sleeve.

2. The sealing structure of the electronic water pump isolation sleeve as claimed in claim 1, wherein the outer wall of the isolation sleeve is further provided with a raised annular wall, and a mounting position for arranging the sealing element is formed between the annular wall and the groove wall of the connecting groove.

3. A sealing structure of an electronic water pump spacer sleeve according to claim 2, wherein a clearance is provided between the annular wall and a groove wall of the connecting groove.

4. A sealing structure of an electronic water pump spacer sleeve according to claim 3, wherein a protruding tubular portion is provided on a cover surface of the rear cover, and a lumen of the tubular portion forms the connecting groove.

5. A sealing structure of an electronic water pump isolation sleeve according to claim 4, wherein the inner wall of the tubular part is further provided with an annular table, and the sealing element is arranged between the annular table and the annular wall.

6. A sealing structure of an electronic water pump isolation sleeve according to claim 5, wherein an annular groove is further concavely formed at the bottom of the tubular part, and the end part of the isolation sleeve extends to the annular groove.

7. A sealing structure of an electronic water pump isolation sleeve according to claim 6, wherein a reserved space is further arranged between the groove wall of the annular groove and the outer wall of the isolation sleeve.

8. A sealing structure of an electronic water pump spacer sleeve according to any one of claims 1 to 7, wherein the sealing member is a sealing ring.

9. A sealing structure of an electronic water pump isolation sleeve according to claim 8, further comprising a water pump housing, wherein the rear cover is connected to a rear end portion of the water pump housing, and the other end of the isolation sleeve is hermetically connected to a front end portion of the water pump housing.

10. The sealing structure of the electronic water pump spacer sleeve according to claim 9, further comprising a rotating shaft and an impeller, wherein the rear end of the rotating shaft is rotatably connected to the rear cover, the front end of the rotating shaft penetrates through the water pump housing, the impeller is connected to the front end of the rotating shaft, the water pump housing is further provided with a liquid inlet hole, the rotating shaft is provided with a liquid outlet channel, and the liquid inlet hole, the cavity of the spacer sleeve and the liquid outlet channel are sequentially communicated to form a cooling liquid channel.