Stator end cooling structure of oil-cooled motor

Abstract

The utility model relates to an oil cooling motor stator end portion cooling structure, comprising a housing and a stator assembly, the housing comprises an integrated housing and an end cover fixed on one end of the integrated housing, the stator assembly is arranged on the inner wall of the integrated housing, the integrated housing is also internally provided with a cooling oil path communicated with an external oil pump, an oil injection ring used for cooling the stator assembly is further arranged on the inner wall of the integrated shell, the cooling oil way is communicated to the oil injection ring, the oil injection ring is formed by bending a long strip body and then connecting the long strip body end to end, the two sides of the long strip body are turned outwards to form buckling edges, a plurality of oil injection holes A are formed in the long strip body at intervals, an annular groove is formed in the side wall of the integrated shell, and the oil injection ring is embedded in the annular groove. And the cooling oil path on the integrated shell is communicated to the annular groove and sprays to the coil end part of the stator assembly through the oil spraying hole A. The cooling oil path is convenient to machine, the oil injection ring is arranged at the end of the coil, the contact area of the stator assembly and the integrated shell is not changed, and installation is firmer.

Description

Technical Field

[0001] The utility model relates to a stator assembly of an oil-cooled motor, and more specifically to a cooling structure for the stator end of an oil-cooled motor. Background Art

[0002] At present, there are two types of stator assembly structures commonly used in the market for oil-cooled motors: the first is that the outer diameter of the stator silicon steel sheet is slotted along the axis, and the slot cooperates with the shell wall to form a closed channel. The cooling lubricating oil passes through the shell oil channel and enters the closed channel above, taking away the heat of the silicon steel sheet. This design can solve the heat dissipation problem very well, but there is a defect that the contact surface between the stator assembly and the motor housing is reduced, which reduces the design defect of the clamping force between the stator and the motor housing; the second is to make up for the defects of the first solution, and the slots arranged on the outer circle of the stator assembly are designed inside the silicon steel sheet to form a circle of regularly arranged circular holes. In order to arrange these oil-passing circular holes, the outer diameter of the stator silicon steel sheet needs to be increased accordingly, and the silicon steel sheet and the motor housing and the layout space are also increased accordingly. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide an oil-cooled motor stator end cooling structure, which structure will neither increase the volume of the stator assembly nor affect the installation and fixation of the stator assembly.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0005] A cooling structure for an oil-cooled motor stator end comprises a shell and a stator assembly, wherein the shell comprises an integrated shell and an end cover fixed to one end of the integrated shell, the stator assembly is arranged on the inner wall of the integrated shell, the integrated shell is also provided with a cooling oil circuit connected to an external oil pump, the inner wall of the integrated shell is also provided with an oil spray ring for cooling the stator assembly, the cooling oil circuit is connected to the oil spray ring, the oil spray ring is formed by bending a long strip and connecting the end to the end, the two sides of the long strip are folded outward to form a buckle edge, a plurality of oil spray holes A are arranged at intervals on the long strip, an annular groove is provided on the side wall of the integrated shell, the oil spray ring is embedded in the annular groove, the cooling oil circuit on the integrated shell is connected to the annular groove, and sprays toward the end of the coil of the stator assembly through the oil spray hole A.

[0006] As a preferred solution: a track rod is also provided in the fuel injection ring, a positioning block A is provided at one end of the elongated body, a joint block is provided at the other end of the elongated body, one end of the elongated body is embedded in the joint block at the other end, a positioning block B is also provided in the joint block, and a spacing is left between the positioning block A and the positioning block B, the track rod passes through the positioning block A and the positioning block B, both ends of the track rod are provided with protrusions, a reset spring is provided between the positioning block A and the protrusion at one end of the track rod, a baffle is also clamped on the side of the positioning block B on the elongated body away from the positioning block A, the track rod passes through the baffle, and under the action of the reset spring, the protrusion at the other end of the track rod is abutted against the baffle.

[0007] As a preferred solution: a recess for accommodating a connector block is further provided in the annular groove of the integrated housing.

[0008] As a preferred solution: there are two track rods, and the two track rods are arranged parallel to each other.

[0009] As a preferred solution: there are two annular grooves on the integrated housing, which are respectively located at the ends of the coils at both ends of the stator assembly, and an oil injection ring is arranged in each annular groove.

[0010] As a preferred solution: the cooling oil circuit on the integrated housing includes a housing axial oil circuit A, a housing radial oil circuit and a housing axial oil circuit B which are connected in sequence, the housing axial oil circuit A is connected to two oil injection rings, and the housing axial oil circuit B is connected to an external oil pump.

[0011] As a preferred solution: a cooler is also provided on the housing, and the cooler is connected between the external oil pump and the cooling oil circuit.

[0012] As a preferred solution: an oil return passage is also provided on the integrated housing.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model arranges a cooling oil circuit on the integrated shell, the cooling oil circuit is easy to process, and cooperates with the oil injection ring structure to cool the stator assembly. The oil injection ring is arranged at the end of the wire package, the contact area between the stator assembly and the integrated shell remains unchanged, and the installation is more firm; at the same time, the cooling oil circuit in the integrated shell can take away the heat on the stator core, thereby improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cutaway structure of the integrated housing of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the oil injection ring of the utility model.

[0019] The accompanying drawings are marked as follows: 101, integrated housing; 102, end cover; 11, oil injection ring; 12, stator assembly; 1011, oil return passage; 1012, housing axial oil passage A; 1013, housing radial oil passage; 1014, housing axial oil passage B; 1101, elongated body; 1102, oil injection hole A; 1103, track rod; 1104, return spring; 1105, baffle; 1106, positioning block A; 1107, positioning block B; 1108, joint block; 3, cooler. DETAILED DESCRIPTION

[0020] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0027] like Figures 1 to 3 The stator end cooling structure of an oil-cooled motor shown in the figure includes a shell and a stator assembly 12, the shell includes an integrated shell 101 and an end cover 102 fixed to one end of the integrated shell 101, the stator assembly is arranged on the inner wall of the integrated shell 101, and a cooling oil circuit connected to an external oil pump is also provided in the integrated shell 101, and an oil spray ring 11 for cooling the stator assembly 12 is also provided on the inner wall of the integrated shell 101, the cooling oil circuit is connected to the oil spray ring 11, and the oil spray ring 11 is formed by bending a long strip 1101 and connecting the end to the end, and the two sides of the long strip 1101 are folded outward to form buckled edges, and a plurality of oil spray holes A1102 are arranged at intervals on the long strip 1101, and an annular groove is provided on the side wall of the integrated shell 101, and the oil spray ring 11 is embedded in the annular groove, and the cooling oil circuit on the integrated shell 101 is connected to the annular groove, and sprays to the coil end of the stator assembly through the oil spray hole A1102.

[0028] The cooling oil circuit on the integrated housing 101 includes a housing axial oil circuit A1012, a housing radial oil circuit 1013 and a housing axial oil circuit B1014 which are connected in sequence. The housing axial oil circuit A1012 is connected to two oil injection rings 11, and the housing axial oil circuit B1014 is connected to an external oil pump. The integrated housing 101 is also provided with an oil return passage 1011 connected to the mounting cavity.

[0029] The fuel injection ring 11 is also provided with a track rod 1103, one end of the elongated body 1101 is provided with a positioning block A1106, the other end of the elongated body 1101 is provided with a joint block 1108, one end of the elongated body 1101 is embedded in the joint block 1108 at the other end, and the joint block 1108 is also provided with a positioning block B1107, and a spacing is left between the positioning block A1106 and the positioning block B1107, and the track rod 1103 passes through the positioning block A1106 and the positioning block B1107. The positioning block B1107 and both ends of the track rod 1103 are provided with protrusions, and a reset spring 1104 is provided between the positioning block A1106 and the protrusion at one end of the track rod 1103. The positioning block B1107 on the elongated body 1101 is also provided with a baffle 1105 on the side away from the positioning block A1106. The track rod 1103 penetrates the baffle 1105, and under the action of the reset spring 1104, the protrusion at the other end of the track rod 1103 is abutted against the baffle 1105.

[0030] The annular groove of the integrated housing 101 is also provided with a notch for accommodating the joint block 1108. There are two track bars 1103, and the two track bars 1103 are arranged parallel to each other. There are two annular grooves on the integrated housing 101, which are respectively located at the ends of the coils at both ends of the stator assembly, and an oil injection ring 11 is arranged in each annular groove.

[0031] The above-mentioned oil spray ring structure can be expanded and contracted according to a specific mode, and the oil spray ring and the ring groove cooperate to form a closed space. The cooling lubricating oil sprays the coolant onto the stator assembly coil and silicon steel sheet through the oil spray hole A arranged on the oil spray ring.

[0032] Before assembly, the front and rear ends of the fuel injection ring are close to each other under the action of external force, and the initial position of the fuel injection ring is locked by a baffle inserted in the fuel injection hole A. In this state, the return spring of the fuel injection ring is compressed under the drive of the track rod. In the initial state, the maximum outer diameter of the fuel injection ring is smaller than the inner diameter of the motor housing, which facilitates the installation of the fuel injection ring.

[0033] When the fuel injection ring is installed in place, the baffle of the fuel injection ring is loosened from the fuel injection hole A, and the track rod of the fuel injection ring moves under the external force of the return spring, and the diameter of the fuel injection ring increases. When the fuel injection ring expands to match the ring groove of the integrated housing, the two stop moving, and the fuel injection ring is pressed against the ring groove of the integrated housing under the residual elastic force of the return spring.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An oil-cooled motor stator end cooling structure, characterized in that: The invention comprises a housing and a stator assembly (12), wherein the housing comprises an integrated housing (101) and an end cover (102) fixed to one end of the integrated housing (101), wherein the stator assembly is arranged on the inner wall of the integrated housing (101), wherein the integrated housing (101) is also provided with a cooling oil circuit connected to an external oil pump, and wherein the inner wall of the integrated housing (101) is also provided with an oil injection ring (11) for cooling the stator assembly (12), wherein the cooling oil circuit is connected to the oil injection ring (11), and wherein the stator assembly (12) is provided with a cooling oil circuit connected to the oil injection ring (11). The oil injection ring (11) is formed by bending a long strip (1101) and connecting the ends thereof. The two sides of the long strip (1101) are folded outward to form buckled edges. A plurality of oil injection holes A (1102) are arranged at intervals on the long strip (1101). A ring groove is arranged on the side wall of the integrated shell (101). The oil injection ring (11) is embedded in the ring groove. The cooling oil path on the integrated shell (101) is connected to the ring groove and sprays toward the end of the coil of the stator assembly through the oil injection hole A (1102).

2. The oil-cooled motor stator end cooling structure according to claim 1, characterized in that: A track rod (1103) is also provided in the injection ring (11); a positioning block A (1106) is provided at one end of the elongated body (1101); a joint block (1108) is provided at the other end of the elongated body (1101); one end of the elongated body (1101) is embedded in the joint block (1108) at the other end; a positioning block B (1107) is also provided in the joint block (1108); a spacing is left between the positioning block A (1106) and the positioning block B (1107); the track rod (1103) passes through the positioning block A (1106) and the positioning block B (1107); A positioning block B (1107), protrusions are provided at both ends of the track rod (1103), a return spring (1104) is provided between the positioning block A (1106) and the protrusion at one end of the track rod (1103), a baffle (1105) is also provided on the side of the positioning block B (1107) on the elongated body (1101) away from the positioning block A (1106), the track rod (1103) passes through the baffle (1105), and under the action of the return spring (1104), the protrusion at the other end of the track rod (1103) is abutted against the baffle (1105).

3. The oil-cooled motor stator end cooling structure according to claim 2, characterized in that: A recess for accommodating a connector block (1108) is also provided in the annular groove of the integrated housing (101).

4. The oil-cooled motor stator end cooling structure according to claim 2, characterized in that: There are two track bars (1103), and the two track bars (1103) are arranged parallel to each other.

5. The oil-cooled motor stator end cooling structure according to claim 1, characterized in that: There are two annular grooves on the integrated housing (101), which are respectively located at the ends of the coils at both ends of the stator assembly, and an oil injection ring (11) is arranged in each annular groove.

6. The oil-cooled motor stator end cooling structure according to claim 1, characterized in that: The cooling oil circuit on the integrated housing (101) comprises a housing axial oil circuit A (1012), a housing radial oil circuit (1013) and a housing axial oil circuit B (1014) which are connected in sequence, wherein the housing axial oil circuit A (1012) is connected to two oil injection rings (11), and the housing axial oil circuit B (1014) is connected to an external oil pump.

7. The oil-cooled motor stator end cooling structure according to claim 1, characterized in that: A cooler (3) is also provided on the shell, and the cooler (3) is connected between the external oil pump and the cooling oil circuit.

8. The oil-cooled motor stator end cooling structure according to claim 1, characterized in that: The integrated housing (101) is also provided with an oil return passage (1011).

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