Stator spraying oil pipe structure of oil-cooled motor
By designing the stator spray oil pipe structure of the oil-cooled motor, and using interconnected axial and circumferential spray oil pipes and oil holes of different diameters, the problem of uneven flow was solved, a larger spray area and a more uniform flow distribution were achieved, and the heat dissipation effect of the motor was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-27
AI Technical Summary
The stator spray cooling of existing oil-cooled motors has uneven flow rate, resulting in poor heat dissipation. In particular, the flow rate is smaller at the end far from the reducer, which affects the overall heat dissipation performance of the motor.
A stator spray oil pipe structure for an oil-cooled motor is designed, which adopts interconnected axial spray oil pipes and circumferential spray oil pipes, combined with oil holes of different diameters, to ensure a large spray area and uniform flow. The spray pipe assembly covers a large area and precisely controls the flow distribution of each branch.
This results in a larger stator spray area, more uniform flow, reduced overall stator temperature difference, improved temperature rise effect, and enhanced motor heat dissipation performance.
Smart Images
Figure CN224053967U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to new energy motor technical field especially relates to a kind of oil cooling motor stator spray oil pipe structure. BACKGROUND
[0002] New energy automobile drive motor pursues high power, low cost, high reliability, and the scheme of oil cooling flat wire motor is more and more;The structure form of current oil cooling motor oil circuit is mainly divided into two kinds:
[0003] 1, stator core yoke part is slotted to form oil channel: cooling oil enters annular groove in the middle of iron core from the oil nozzle on the top of shell, then the oil is sprayed to the end of stator end winding by the axial slot of stator core yoke part;
[0004] 2, design oil pipe to spray cooling to stator: cooling oil enters the top of motor cavity from oil pipe at the end of speed reducer, then some small holes are uniformly arranged in oil pipe, cooling oil flows out from these small holes, directly sprays cooling to stator, and the flow is not uniform when oil pipe is guided into motor cavity from speed reducer, the closer to the end of speed reducer, the greater the flow, the farther from the speed reducer, the smaller the flow, and the pipeline arrangement is also not uniform. UTILITY MODEL CONTENTS
[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an oil cooling motor stator spray oil pipe structure, which has larger spraying area, uniform spraying flow and good overall heat dissipation effect.
[0006] In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:
[0007] An oil cooling motor stator spray oil pipe structure, comprising a shell and a stator, the stator is fixed in the shell, further comprising a spray pipe assembly, a gap is left between the stator and the shell, the spray pipe assembly is fixed in the gap, the spray pipe assembly comprises an axial spray oil pipe and a circumferential spray oil pipe connected with each other, oil holes are arranged on the axial spray oil pipe and the circumferential spray oil pipe towards the stator, an oil inlet pipe is further arranged on the shell, and the oil inlet pipe is communicated with the axial spray oil pipe and / or the circumferential spray oil pipe;The axial spray oil pipe is connected with the circumferential spray oil pipe at intervals, and the oil hole diameter of the middle part of the axial spray oil pipe is smaller than the oil hole diameter of the two ends of the axial spray oil pipe.
[0008] As a preferred scheme: the axial spray oil pipe is fixed with the shell through an oil pipe fixing sheet, an inner oil inlet pipe communicated with the axial spray oil pipe and / or the circumferential spray oil pipe is further arranged in the oil inlet pipe, and a sealing structure is arranged between the oil inlet pipe and the inner oil inlet pipe.
[0009] As a preferred scheme: the outer side of the stator is provided with a plurality of connecting ears, the inner wall of the shell is provided with a plurality of connecting notches, and the connecting ears and the connecting notches are fastened through bolts.
[0010] As a preferred scheme: the spray pipe assembly is arranged between the two connecting ears, and the two sides of the spray pipe assembly are further provided with outer axial spray oil pipes, which are communicated with the spray pipe assembly through cross-over hoses.
[0011] As a preferred scheme: the cross-over hoses are bound or fixed through a cable tie or a clamp between the outer axial spray oil pipes and / or the axial spray oil pipes.
[0012] As a preferred scheme: the two ends of the shell are respectively fixed with cover plates A and B, and at least one end of the axial spray oil pipe is communicated with a bearing chamber on the cover plate A and / or the cover plate B through a bearing oil way hose.
[0013] As a preferred scheme: the cover plate A and / or the cover plate B are further provided with an oil seal for cooperating with the rotating shaft.
[0014] As a preferred scheme: the shell is further provided with an oil outlet pipe.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] The utility model discloses a spray pipe assembly is designed into the axial spray oil pipe and the circumferential spray oil pipe that intercommunication, makes the spray oil pipe can cover the larger range as far as possible, and distribution is more uniform, thereby making the spray area be larger, and the oil hole of different aperture is cooperated simultaneously, can accurately control the flow distribution of each branch, makes each branch flow distribution be more reasonable and balanced, and the overall temperature difference of the stator will not be too big, and the temperature rise improvement effect is better. BRIEF DESCRIPTION OF DRAWINGS
[0017] The drawings accompanying the specification provide further understanding of the present application, the illustrative embodiments thereof, and ways in which the application can be practiced.
[0018] Figure 1 And Figure 2 are two different angle structure schematic diagrams of the motor adopting the structure of the utility model;
[0019] Figure 3 And Figure 4 are two different angle explosion structure schematic diagrams of the motor adopting the structure of the utility model;
[0020] Figure 5 And Figure 6 are two different angle structure schematic diagrams of the shell and the spray pipe assembly of the utility model;
[0021] Figure 7 is a structure diagram of the spraying pipe assembly and the stator of the utility model;
[0022] Figure 8 is a structure diagram of the spraying pipe assembly of the utility model.
[0023] The figure mark is: 1, the shell;11, the cover plate A;111, the oil pipe cover;112, the rotor oil pipe;12, the cover plate B;13, the oil inlet pipe;14, the oil outlet pipe;2, the stator;3, the rotor;31, the rotating shaft;4, the spraying pipe assembly;40, the oil hole;41, the axial spraying oil pipe;411, the outer axial spraying oil pipe;42, the circumferential spraying oil pipe;43, the jumper hose;44, the bearing oil circuit hose;45, the oil pipe fixing piece;46, the inner oil inlet pipe;6, the oil seal. DETAILED DESCRIPTION
[0024] It should be noted that the following detailed description is illustrative only, and is intended to provide further description in order to provide a further understanding of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0025] It should be noted that the terms used herein are merely for the purpose of describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.
[0026] In addition, in the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0027] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more, unless otherwise explicitly limited.
[0028] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0029] In the present application, unless otherwise expressly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.
[0030] The present application will be further described below in conjunction with the drawings and examples:
[0031] As shown in the drawings, Figures 1 to 4 An oil-cooled motor, comprising a shell 1, a stator 2 and a rotor 3, the stator 2 is fixed in the shell 1, the rotor 3 is arranged in the stator 2, the both ends of the shell 1 are respectively fixed with cover plate A11 and cover plate B12, the rotor 3 comprises a rotating shaft 31 and a rotor core, the both ends of the rotating shaft 31 are respectively rotatably connected with the cover plate A11 and the cover plate B12 through bearings, further comprising a spray pipe assembly 4, the stator 2 and the shell 1 are left with a gap, the spray pipe assembly 4 is fixed in the gap, the spray pipe assembly 4 comprises an axial spray oil pipe 41 and a circumferential spray oil pipe 42 connected with each other, the axial spray oil pipe 41 and the circumferential spray oil pipe 42 are both provided with oil holes 40 facing the stator 2, the shell 1 is further provided with an oil inlet pipe 13, the oil inlet pipe 13 is communicated with the axial spray oil pipe 41 and / or the circumferential spray oil pipe 42, and the shell 1 is further provided with an oil outlet pipe 14.
[0032] The rotating shaft 31 is provided with an axial oil channel, and the axial oil channel is further provided with a side wall oil hole, the cover plate A11 or the cover plate B12 is provided with a radial oil inlet pipe, one end of the radial oil inlet pipe is communicated with the axial spray oil pipe 41, the other end of the radial oil inlet pipe extends outwardly into the axial oil channel, the rotor core is provided with a radial oil throwing passage, and the side wall oil hole is communicated with the radial oil throwing passage.
[0033] The cover plate A11 is also fixed with an oil pipe cover 111, the radial oil inlet pipeline is arranged in the oil pipe cover 111, one end of the oil pipe cover 111 extends to form a rotor oil pipe 112 extending into the rotating shaft 31, the other end of the oil pipe cover 111 is provided with a cover plate communication hole, the axial spraying oil pipe 41 penetrates the cover plate A11 and is inserted into the cover plate communication hole, and the rotor oil pipe 112, the radial oil inlet pipeline and the axial spraying oil pipe 41 are communicated with each other.
[0034] The axial spraying oil pipe 41 is arranged in the cover plate A11 or the cover plate B12, and the cooling oil is introduced into the hollow rotating shaft of the rotor, then several oil holes are uniformly distributed on the circumference of the hollow rotating shaft, the cooling oil is introduced into the radial oil throwing passage on the rotor core, and finally the cooling oil is thrown to the stator winding through the radial oil throwing passage, so that the rotor and the winding are cooled.
[0035] As shown in Figures 5 to 8 The axial spraying oil pipe 41 is arranged in the cover plate A11 or the cover plate B12, and the cooling oil is introduced into the hollow rotating shaft of the rotor, then several oil holes are uniformly distributed on the circumference of the hollow rotating shaft, the cooling oil is introduced into the radial oil throwing passage on the rotor core, and finally the cooling oil is thrown to the stator winding through the radial oil throwing passage, so that the rotor and the winding are cooled.
[0036] The inner oil inlet pipe 46 directly penetrates the cover plate A11 and is connected with the circumferential spraying oil pipe 42, the circumferential spraying oil pipe 42 is a middle horizontal pipe, the middle horizontal pipe divides the cooling oil, and four symmetrical branch pipes (axial spraying oil pipes 41) are arranged on both sides of the middle horizontal pipe and cover the top of the stator.
[0037] In order to ensure that the spraying flow of each pipeline is uniform, a row of small holes with a diameter of 1.5 mm is arranged in the middle horizontal pipe, and two circles of oil holes are arranged in all branch pipes, the diameter of the hole close to the middle horizontal pipe is 1.5 mm, and the diameter of the hole away from the middle horizontal pipe is 2.5 mm. By changing the diameter of each oil hole, the flow distribution of each branch pipe can be accurately controlled, so that the flow distribution of each branch pipe is more reasonable and balanced, the temperature difference of the stator is not too large, and the temperature rise is improved.
[0038] The outer side of the stator 2 is provided with a plurality of connecting ears, the inner wall of the shell 1 is provided with a plurality of connecting notches, and the connecting ears and the connecting notches are fastened by bolts.
[0039] For the iron core fixing bolt is more, there will be iron core fixed ear to block the cooling oil to the left and right sides of the iron core problem, can be increased in the iron core left and right sides each one oil pipe, using the hose jumper form will cooling oil to the left and right sides of the iron core, and through the control oil pipe and hose connection hole diameter, realize the left and right sides cooling oil flow control. Left and right sides of the oil pipe respectively open two rows of oil hole, in order to ensure the flow balance, the closer to the hose hole diameter is smaller, the farther from the hose hole diameter is larger. Both sides of the oil pipe and the middle oil pipe through the hose connection. The specific structure is as follows:
[0040] The spray pipe assembly 4 is arranged between the two connecting ears, and outer axial spray oil pipes 411 are further arranged on the two sides of the spray pipe assembly 4, and the outer axial spray oil pipes 411 are communicated with the spray pipe assembly 4 through jumper hoses 43. The jumper hoses 43 are fixed between the outer axial spray oil pipes 411 and / or the axial spray oil pipes 41 by means of a strap or a clamp. The above structure is used for expanding the spray on the two sides of the stator six lug stators, and improving the spray effect on the side surface of the stator core through the jumper hose.
[0041] In order to ensure the sufficient lubrication of the bearing, a hole is punched on the end cover to pass through the bottom of the bearing chamber, and the cooling oil of the top oil pipe is introduced into the bearing chamber through a hose, and the flow of the cooling oil in the bearing chamber is controlled by controlling the hole diameter at the connection between the oil pipe and the hose; the specific structure is as follows:
[0042] At least one end of the axial spray oil pipe 41 is communicated with the bearing chamber on the cover plate A11 and / or the cover plate B12 through a bearing oil line hose 44. The cover plate A11 and / or the cover plate B12 are further provided with an oil seal 6 between the cover plate A11 and / or the cover plate B12 and the rotating shaft 31. The cooling oil is directly introduced into the bearing chamber through the hose, so that the lubrication and cooling conditions of the bearing are better, and the service life of the bearing is higher.
[0043] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description 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.
[0044] Although the above has shown and described the embodiments of the present application, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the ordinary skilled in the art can change, modify, replace and transform the above embodiments within the scope of the present application without departing from the principles and purposes of the present application, and any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments still belongs to the scope of the technical scheme of the present application.
Claims
1. An oil cooling motor stator spray oil pipe structure comprising a shell (1) and a stator (2), the stator (2) being fixed in the shell (1), characterized in that: The spray pipe assembly (4) is arranged in the gap between the stator (2) and the shell (1), and the spray pipe assembly (4) is fixed in the gap, wherein the spray pipe assembly (4) comprises an axial spray oil pipe (41) and a circumferential spray oil pipe (42) connected with each other, and the axial spray oil pipe (41) and the circumferential spray oil pipe (42) are both provided with oil holes (40) facing the stator (2), and the shell (1) is further provided with an oil inlet pipe (13) in communication with the axial spray oil pipe (41) and / or the circumferential spray oil pipe (42); the axial spray oil pipe (41) is a plurality of axial spray oil pipes (41) connected at intervals on the circumferential spray oil pipe (42), and the oil holes (40) in the middle of the axial spray oil pipe (41) have a smaller diameter than the oil holes (40) at both ends of the axial spray oil pipe (41).
2. The oil-cooled motor stator spray pipe structure according to claim 1, characterized in that: The axial spray oil pipe (41) is fixed to the shell (1) by an oil pipe fixing sheet (45), and the oil inlet pipe (13) is further provided with an inner oil inlet pipe (46) in communication with the axial spray oil pipe (41) and / or the circumferential spray oil pipe (42), and a sealing structure is arranged between the oil inlet pipe (13) and the inner oil inlet pipe (46).
3. The oil-cooled motor stator spray pipe structure according to claim 1, characterized in that: The outer side of the stator (2) is provided with a plurality of connecting ears, and the inner wall of the shell (1) is provided with a plurality of connecting notches, and the connecting ears and the connecting notches are fastened by bolts.
4. An oil-cooled electric machine stator spray tube structure according to claim 3, characterized in that: The spray pipe assembly (4) is arranged between two connecting ears, and both sides of the spray pipe assembly (4) are further provided with outer axial spray oil pipes (411), and the outer axial spray oil pipes (411) are in communication with the spray pipe assembly (4) through a cross-connection hose (43).
5. An oil-cooled electric machine stator spray tube structure according to claim 4, characterized in that: The cross-connection hose (43) and the outer axial spray oil pipes (411) and / or the axial spray oil pipes (41) are bound or fixed by a cable tie or a clamp.
6. An oil-cooled electric machine stator spray tube structure according to claim 1, characterized in that: The shell (1) is respectively fixed with a cover plate A (11) and a cover plate B (12) at both ends, and at least one end of the axial spray oil pipe (41) is in communication with a bearing chamber (110) on the cover plate A (11) and / or the cover plate B (12) through a bearing oil path hose (44).
7. An oil-cooled electric machine stator spray tube structure according to claim 6, characterized in that: The cover plate A (11) and / or the cover plate B (12) are further provided with an oil seal (6) for cooperating with the rotating shaft (31).
8. The oil-cooled motor stator spray tube structure according to claim 1, characterized in that: The shell (1) is further provided with an oil outlet pipe (14).