Casing and motor thereof

Abstract

The utility model discloses a casing and a motor thereof, and belongs to the technical field of automobile motors, the casing comprises a cylinder body, a front end cover fixed at the front end of the cylinder body and a rear end cover fixed at the rear end of the cylinder body, and guide vanes are arranged on the outer wall of the cylinder body; the sleeve is arranged on the cylinder body in a sleeving mode and covers the guide vanes, and the gap between the sleeve and the cylinder body is divided into a flow channel through the guide vanes. The casing designed by the utility model can be assembled, the guide vanes are welded on the surface of the barrel, and after the sleeve is sleeved on the barrel and the guide vanes, the front end cover and the rear end cover at the two ends are fixed on the barrel, so that the sleeve can be limited, a spiral flow channel is formed between the sleeve and the barrel, and cooling liquid is injected into the flow channel through the liquid inlet; and liquid cooling heat dissipation can be carried out on the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile motor, specifically relates to a casing and motor thereof. BACKGROUND

[0002] With the continuous improvement of the power density of automobile motor, the heat generated in its operation process increases sharply, and effective heat dissipation has become a key technology to ensure the reliable operation of the motor. The traditional motor casing adopts natural cooling or air cooling mode, but for high load working conditions, such passive heat dissipation mode has been difficult to meet the temperature control demand. Therefore, the industry gradually develops a liquid-cooled casing structure, which realizes active heat management by setting a cooling flow channel in the casing.

[0003] The existing liquid-cooled casing is mostly embedded with a serpentine metal pipeline in the casing, which can realize directional flow guide, but has the defects of limited contact area between the pipeline and the casing and large thermal resistance, and the pipeline welding process is complex and prone to leakage hazards. UTILITY MODEL CONTENT

[0004] In view of the above technical deficiencies, the utility model aims to provide a casing and motor thereof, which can increase the contact area between the flow channel and the casing body and improve the heat conduction effect through combined design.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model provides a casing, which comprises a cylinder, a front end cover fixed at the front end of the cylinder and a rear end cover fixed at the rear end of the cylinder, and further comprises:

[0006] A flow guide vane is arranged on the outer wall of the cylinder, and the flow guide vane is in a spiral shape.

[0007] A sleeve is sleeved on the cylinder and covers the flow guide vane, and the flow guide vane separates the gap between the sleeve and the cylinder into a flow channel.

[0008] A sealing structure is arranged to seal the end portions of the cylinder and the sleeve.

[0009] The sleeve is provided with a liquid inlet and a liquid outlet which communicate with the flow channel.

[0010] Preferably, the flow guide vane is provided with two flow guide vanes, and the two flow guide vanes are respectively located on the front and rear sides of the center of the cylinder, and the liquid inlet is located between the two flow guide vanes; the liquid outlet is provided with two liquid outlets, which are respectively located at the ends of the two flow guide vanes away from the liquid inlet.

[0011] Preferably, the pitch of the flow guide vane is a gradually changing pitch, and the pitch of one end of the flow guide vane close to the liquid inlet is smaller than the pitch of the other end.

[0012] Preferably, a front convex ring and a rear convex ring are respectively provided at both ends of the cylinder, the outer diameter of the front convex ring is larger than the outer diameter of the rear convex ring; the outer diameter of the guide vane is greater than or equal to the outer diameter of the rear convex ring and smaller than the outer diameter of the front convex ring.

[0013] Preferably, a first positioning block is provided on the front protruding ring, a second positioning block is provided on the rear end cover, and a first limiting part and a second limiting part are fixed on the outer wall of the sleeve, which are respectively inserted and cooperated with the first positioning block and the second positioning block.

[0014] Preferably, the sealing structure includes:

[0015] The first sealing ring has a first annular groove on the front convex ring, and the first sealing ring is disposed in the first annular groove. The front end of the sleeve is inserted into the first annular groove and abuts against the first sealing ring.

[0016] The second sealing ring is fitted onto the rear convex ring and abuts against the sleeve, and the rear end cover abuts against the second sealing ring.

[0017] Preferably, the sealing structure further includes:

[0018] The second annular groove is formed on the end face of the rear convex ring away from the front convex ring;

[0019] The third sealing ring is disposed on the second annular groove, and the rear end cover abuts against the third sealing ring.

[0020] Preferably, the outer wall of the cylinder located in the flow channel has multiple turbulence grooves.

[0021] Preferably, the depth of the turbulent channel gradually decreases along the flow direction of the coolant.

[0022] An electric motor, comprising the aforementioned housing.

[0023] The beneficial effects of this utility model are as follows:

[0024] The housing designed in this utility model can be assembled. Guide vanes are welded to the surface of the cylinder. After the sleeve is fitted onto the cylinder and guide vanes, the front and rear end caps at both ends are fixed to the cylinder, which limits the sleeve and forms a spiral flow channel between the sleeve and the cylinder. Coolant is injected into the flow channel through the liquid inlet to provide liquid cooling for the motor. The multiple turbulence grooves opened on the outer wall of the cylinder not only increase the contact area between the coolant and the cylinder, but also create turbulence in the flow channel, so that the coolant can exchange heat with the cylinder more fully when flowing in the flow channel, thus improving the heat dissipation effect. Attached Figure Description

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings described in the following only represent some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] Figure 1 A perspective view of a shell is provided for the embodiments of the present application.

[0027] Figure 2 A perspective view of a middle cylinder and a guide vane is provided for the embodiments of the present application.

[0028] Figure 3 A top view of the cylinder and the guide vane is provided for the embodiments of the present application.

[0029] Figure 4 A top view of the overall structure is provided for the embodiments of the present application.

[0030] Figure 5 A Figure 4 Sectional view of A-A.

[0031] Figure 6 A Figure 4 Sectional view of B-B.

[0032] Figure 7 A Figure 4 Local enlarged view of A.

[0033] Explanation of reference signs:

[0034] 1, cylinder, 2, front end cover, 3, rear end cover, 4, guide vane, 5, sleeve, 6, flow channel, 7, liquid inlet, 8, liquid outlet, 9, front protruding ring, 10, rear protruding ring, 11, first positioning block, 12, second positioning block, 13, first limiting portion, 14, second limiting portion, 15, first sealing ring, 16, first annular groove, 17, second sealing ring, 18, second annular groove, 19, third sealing ring, 20, turbulent groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] Embodiment one:

[0037] AsFigures 1 to 7 As shown in the utility model embodiment one provides a casing, can be used on the drive motor of car. The casing is mainly composed of cylinder 1, flow guide assembly and sealing assembly. Cylinder 1 is cylindrical structure, its front end is fixed with circular front end cover 2 by bolt, rear end is fixed with circular rear end cover 3 by bolt, forms closed casing frame.

[0038] Two helical flow guide vanes 4 are welded on the outer circumferential surface of cylinder 1 along the axial direction, and the two flow guide vanes 4 are distributed on the front and rear sides of the central axis of cylinder 1. Figure 3 And Figure 5 As shown, sleeve 5 is provided on the outer sleeve of cylinder 1, and sleeve 5 completely wraps flow guide vane 4. The inner wall of sleeve 5 is attached to the outer edge of flow guide vane 4, so that flow guide vane 4 separates the gap space between sleeve 5 and cylinder 1 into helical flow channels 6. A circular liquid inlet 7 is formed in the middle of sleeve 5, which can be connected to the pipeline of the cooling liquid circulation system. The helical parameters of flow guide vane 4 are optimized and designed, and the pitch of one end of flow guide vane 4 close to liquid inlet 7 is smaller than the pitch of the other end. The pitch close to the middle is 15mm, gradually increasing to 30mm towards both ends, forming a gradually changing helical structure. Liquid inlet 7 is opposite to the middle interval area of the two flow guide vanes 4, which can simultaneously transport cooling liquid to the flow channels 6 on both sides; liquid outlet 8 is formed in the end face close to both ends of sleeve 5, forming a one-in and two-out circulating flow channel 6 structure.

[0039] The cooling liquid input from liquid inlet 7 is discharged from the liquid outlet 8 at both ends after passing through the helical flow channels 6 on both sides, fully absorbing the heat in the casing, and cooling the casing.

[0040] In order to seal both ends of sleeve 5 and avoid leakage of cooling liquid, the utility model sets step convex ring structure on both ends of cylinder 1, which are front convex ring 9 and rear convex ring 10, wherein the outer diameter of front convex ring 9 is larger than that of rear convex ring 10, and the outer diameter of flow guide vane 4 is accurately designed between the outer diameter of front convex ring 9 and the outer diameter of rear convex ring 10. The end face of front convex ring 9 is processed with first annular groove 16, and first sealing ring 15 made of fluorine rubber is built-in, and the front end of sleeve 5 is inserted into first annular groove 16 to form axial sealing. The outer periphery of rear convex ring 10 is provided with second sealing ring 17, and the end face is processed with second annular groove 18 for installing third sealing ring 19, and double radial sealing is realized by the compression of rear end cover 3.

[0041] Through the above setting, the utility model realizes the layout of the surrounding cooling flow channel 6 in the casing through the combined design, which is simple in structure, convenient to process and realizes the liquid cooling heat dissipation of motor.

[0042] Embodiment two:

[0043] On the basis of embodiment one, the utility model discloses for the convenient assembly, still designed the positioning system. The positioning system contains the first locating block 11 of the wedge shape on the front convex ring 9 and the second locating block 12 of the wedge shape on rear end cover 3, respectively with the first limit part 13 and the second limit part 14 of sleeve 5 outer wall welding inserts the cooperation of cooperation, ensure that sleeve 5 circumferential positioning is accurate, and the connection is firm.

[0044] Embodiment three:

[0045] On the basis of embodiment one and embodiment two, the utility model still designs the structure of promoting turbulent flow in the flow passage 6 area between the cylinder body 1 and sleeve 5. The outer surface of the cylinder body 1 is processed with multiple depth gradually changes turbulent flow groove 20, and the groove depth gradually changes from deep to shallow along the direction of cooling liquid flow, and the groove width is constant, forms the gradually reduced type turbulence structure.

[0046] When the cooling liquid is injected from the liquid inlet 7, is divided into two counter-current flows under the guidance of helical guide vane 4. Gradual pitch design makes the liquid flow speed gradually drops along the flow direction, and cooperates the vortex effect produced by turbulent flow groove 20, makes the cooling liquid heat distribution more uniform, rapidly for the middle part of the shell cooling, absorbs the heat of both ends sufficiently, significantly improves the heat exchange efficiency.

[0047] Embodiment four:

[0048] On the basis of embodiment one to embodiment three, the utility model still provides a kind of motor containing above-mentioned shell, rotating shaft is rotatably installed on front end cover 2 and rear end cover 3, and rotating shaft is installed with rotor, and stator is fixed on the inner wall of cylinder body 1. Since the shell with liquid cooling heat dissipation structure described above is used, the motor can be cooled well, and the service life of the motor is effectively improved.

[0049] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. A casing comprising a cylinder, a front end cover fixed to a front end of the cylinder, and a rear end cover fixed to a rear end of the cylinder, characterized in that, Also included are: a guide vane arranged on the outer wall of the cylinder, the guide vane being in a spiral shape; a sleeve sleeved on the cylinder and covering the guide vane, the guide vane separating a gap between the sleeve and the cylinder into a flow channel; a sealing structure for sealing the end of the cylinder and the sleeve; wherein the sleeve is provided with a liquid inlet and a liquid outlet in communication with the flow channel.

2. A housing according to claim 1, wherein The guide vane is provided with two guide vanes, the two guide vanes being respectively located on the front and rear sides of the center of the cylinder, and the liquid inlet being located between the two guide vanes; the liquid outlet is provided with two liquid outlets, respectively located at one end of the two guide vanes away from the liquid inlet.

3. A housing according to claim 2, wherein The pitch of the guide vane is a gradually changing pitch, and the pitch of one end of the guide vane close to the liquid inlet is smaller than the pitch of the other end.

4. The housing of claim 1, wherein The cylinder is provided with a front protruding ring and a rear protruding ring at both ends, respectively, the outer diameter of the front protruding ring being larger than the outer diameter of the rear protruding ring; the outer diameter of the guide vane is greater than or equal to the outer diameter of the rear protruding ring and smaller than the outer diameter of the front protruding ring.

5. A housing according to claim 4, wherein The front protruding ring is provided with a first positioning block, the rear end cover is provided with a second positioning block, and the outer wall of the sleeve is fixed with a first limiting portion and a second limiting portion respectively inserted and matched with the first positioning block and the second positioning block.

6. A housing according to claim 4, wherein The sealing structure includes: a first sealing ring, a first annular groove is formed on the front protruding ring, the first sealing ring is arranged in the first annular groove, and the front end of the sleeve is inserted into the first annular groove and abuts against the first sealing ring; a second sealing ring, the second sealing ring is sleeved on the rear protruding ring and abuts against the sleeve, and the rear end cover abuts against the second sealing ring.

7. A housing according to claim 6, wherein The sealing structure further includes: a second annular groove, the second annular groove is formed on the end face of the rear protruding ring away from the front protruding ring; a third sealing ring, the third sealing ring is arranged on the second annular groove, and the rear end cover abuts against the third sealing ring.

8. The housing of claim 1, wherein A plurality of turbulent grooves are formed on the outer wall of the cylinder in the flow channel.

9. A housing according to claim 8, wherein The depth of the turbulent groove gradually decreases along the flow direction of the cooling liquid.

10. An electric machine characterized by A shell comprising any one of claims 1 to 9.

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