Oil injection structure, motor stator cooling system and motor

Abstract

This application provides an oil injection structure, a motor stator cooling system, and a motor. The oil injection structure controls the cooling oil pressure by adjusting the oil pump power, thereby driving an adjustment component to move along the axis of the injection ring. During this movement, the number of injection holes in the conducting state is adjusted, thus meeting the motor's cooling oil flow requirements under different operating conditions. Furthermore, adjusting the oil pump power according to the motor's cooling needs effectively reduces energy consumption. Moreover, when the oil pump power is reduced, the oil injection structure of this application reduces the system output flow by closing some oil holes, thereby ensuring stable system pressure and preventing insufficient system pressure from preventing cooling oil from being sprayed onto the required cooling areas, resulting in unsatisfactory cooling effects.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to fuel injection structures, motor stator cooling systems, and motors. Background Technology

[0002] The oil spray ring, also known as the oil guide ring or oil distribution ring, is a component in an oil-cooled motor used to form the stator cooling oil circuit and spray cooling to the stator ends.

[0003] The number of injection holes on the existing injection ring is fixed and remains open under all operating conditions. Since the number of injection holes is based on the maximum cooling demand, there is a possibility of overcooling when the motor cooling demand is low. This overcooling results in wasted oil pump energy.

[0004] In addition, the existing fuel injection ring increases or decreases the fuel injection flow by adjusting the power of the fuel pump. However, this adjustment method will affect the oil pressure. In particular, when the power of the fuel pump is reduced, the initial pressure of the cooling oil sprayed from the oil hole decreases, and it cannot be sprayed to the position that needs cooling, resulting in an unsatisfactory cooling effect. Utility Model Content

[0005] The purpose of this application is to provide an oil injection structure, a motor stator cooling system, and a motor, which can control the cooling oil pressure by adjusting the oil pump power, thereby driving the adjustment component to move along the axis of the oil injection ring. During the movement, the number of oil injection holes in the conducting state is adjusted, thereby meeting the motor's cooling oil flow requirements under different operating conditions.

[0006] This application provides a fuel injection structure, including a fuel injection ring with multiple fuel injection holes and a state adjustment component for adjusting the number of fuel injection holes in the conducting state on the fuel injection ring.

[0007] In the above technical solution, the state adjustment component further includes:

[0008] A shielding component is provided to cooperate with the outer ring wall of the fuel injection ring;

[0009] The blocking member can move relative to the injection ring along the axial direction of the injection ring to adjust the number of injection holes in the open state.

[0010] In the above technical solution, the shielding member is further defined as an annular shape, and the shielding member is sleeved on the outer wall of the fuel injection ring and is in clearance fit with the fuel injection ring.

[0011] In the above technical solution, the shielding component further includes multiple shielding pieces that are sequentially spliced ​​along the circumferential direction of the outer ring wall of the fuel injection ring, and the shielding pieces are slidably attached to the surface of the outer ring wall of the fuel injection ring.

[0012] In the above technical solution, the state adjustment component further includes:

[0013] A reset member drives the blocking member to move axially along the fuel injection ring to reset it.

[0014] In the above technical solution, the reset component further includes a spring, one end of which is connected to the shield and the other end is connected to the fuel injection ring.

[0015] In the above technical solution, the spring is further arranged parallel to the axial direction of the fuel injection ring, one end of the spring is connected to the end face of the fuel injection ring, and the other end is connected to the end face of the shield.

[0016] In the above technical solution, the injection holes are further distributed in multiple rows along the axial direction of the injection ring, and each row of injection holes is distributed circumferentially along the injection ring.

[0017] This application also provides a motor stator cooling system, including the oil injection structure described above.

[0018] This application also provides an electric motor, including the above-described motor stator cooling system.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] This application provides an oil injection structure that can control the cooling oil pressure by adjusting the oil pump power, thereby driving the adjustment component to move along the axis of the oil injection ring. During the movement, the number of oil injection holes in the conducting state is adjusted, thereby meeting the motor's cooling oil flow requirements under different operating conditions.

[0021] Adjusting the oil pump power according to the motor's cooling requirements can effectively reduce energy consumption. Furthermore, when the oil pump power is reduced, the oil injection structure of this application reduces the system output flow by closing some oil holes, thereby ensuring stable system pressure and avoiding the problem of insufficient system pressure preventing the cooling oil from being sprayed to the areas that need cooling, resulting in unsatisfactory cooling effects.

[0022] This application also provides a motor stator cooling system, including the aforementioned oil injection structure. Therefore, it possesses all the beneficial effects of the aforementioned oil injection structure, and thus will not be specifically described further.

[0023] This application also provides an electric motor including the aforementioned motor stator cooling system. Therefore, it possesses all the beneficial effects of the aforementioned motor stator cooling system, and thus will not be specifically described further. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A top view of the flow-adjustable motor stator cooling structure provided in this application;

[0026] Figure 2 for Figure 1 AA section view in the image.

[0027] Reference numerals: 1-Injection ring; 101-Injection hole; 102-First direction; 103-Second direction; 2-State adjustment component; 201-Blocking component; 202-Reset component; 203-Blocking cylinder; 204-Abutting ring edge; 205-Spring; 206-Preset gap. Detailed Implementation

[0028] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0029] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0030] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0031] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0032] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0033] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0034] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0035] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0036] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0037] Example 1

[0038] This application addresses the issue that existing fuel injection rings have a fixed number of injection holes, all of which are open under all operating conditions. Furthermore, because the number of injection holes is determined based on maximum cooling requirements, this leads to overcooling under conditions with lower cooling demands. Therefore, this application proposes a fuel injection structure. The following section discusses... Figure 1 and Figure 2 The oil spraying structure provided in this application is described in detail. The oil spraying structure is installed at both ends of the stator core of the motor and can spray cooling oil onto the windings at the ends of the motor stator for cooling.

[0039] The oil injection structure includes an oil injection ring 1 with multiple injection holes 101 and a state adjustment assembly 2 for adjusting the number of injection holes 101 in the conducting state on the oil injection ring 1. Specifically, the oil injection ring 1 is a ring component used to guide or distribute cooling oil. The oil injection ring 1 is designed with injection holes 101 for spraying cooling oil onto the ends of the motor stator. Figure 1 and Figure 2 As shown, the fuel injection ring 1 is cylindrical, and the fuel injection holes 101 are distributed in multiple rows along the axial direction of the fuel injection ring 1. Each row of fuel injection holes 101 is distributed circumferentially along the fuel injection ring 1. Optionally, the fuel injection holes 101 in each row can be arranged one-to-one in the circumferential direction.

[0040] Specifically, the state adjustment component 2 is used to adjust the number of oil injection holes 101 in the conducting state on the oil injection ring 1. When the end of the motor stator requires higher cooling, the state adjustment component 2 adjusts to open a larger number of oil injection holes 101, meaning that a larger number of oil injection holes 101 are in the conducting state, thereby allowing a larger amount of cooling oil to be sprayed onto the end of the motor stator to meet the higher cooling requirements of the motor stator end. Conversely, when the end of the motor stator requires lower cooling, the state adjustment component 2 adjusts to open a smaller number of oil injection holes 101, meaning that a smaller number of oil injection holes 101 are in the conducting state, thereby allowing a smaller amount of cooling oil to be sprayed onto the end of the motor stator to meet the lower cooling requirements of the motor stator end.

[0041] Understandably, in actual use, when the cooling demand at the motor stator end is high and requires more cooling oil, the state adjustment component 2 will keep more of the oil injection holes 101 in the open state. At this time, the oil pump will also be in a high-power state, ensuring sufficient oil pressure for the cooling oil to be sprayed from the oil injection holes 101 to the location requiring cooling. When the cooling demand at the motor stator end is low and the required amount of cooling oil is small, the state adjustment component 2 will keep fewer of the oil injection holes 101 in the open state. At this time, the power of the oil pump will also be adaptively adjusted and reduced. Since the number of oil injection holes 101 in the open state is small, the system pressure can still be kept stable, avoiding the situation where insufficient system pressure prevents the cooling oil from being sprayed to the location requiring cooling.

[0042] In one feasible implementation, the relationship between the cooling requirements of the motor stator end, the number of oil injection holes 101 in the conductive state, and the oil pump power can be pre-calibrated at the motor factory. When the cooling requirements of the motor stator end are known, the state adjustment component 2 and the oil pump can be adjusted according to the calibration parameters.

[0043] In one feasible implementation, combined with Figure 2 As shown, the state adjustment component 2 includes a blocking member 201, which is configured to cooperate with the outer ring wall of the fuel injection ring 1. Under normal conditions, the blocking member 201 will block all the fuel injection holes 101 on the fuel injection ring 1, so that all the fuel injection holes 101 are in a closed state.

[0044] Specifically, the blocking member 201 is a component that can move relative to the fuel injection ring 1. It can move along the axial direction of the fuel injection ring 1 to adjust the number of fuel injection holes 101 in the conducting state. That is, when the blocking member 201 moves along the axial direction of the fuel injection ring 1, it exposes a portion of the fuel injection holes 101, and the exposed fuel injection holes 101 are in the conducting state. Therefore, the state adjustment assembly 2 can flexibly adjust the number of fuel injection holes 101 in the conducting state, which is beneficial for controlling the fuel injection quantity.

[0045] Furthermore, to adapt to the shape of the fuel injection ring 1, the blocking member 201 is annular, and is fitted onto the outer wall of the fuel injection ring 1 with a clearance fit, allowing the blocking member 201 to move relative to the outer wall of the fuel injection ring 1. In one feasible embodiment, the blocking member 201 can be moved directly by cooling oil to adjust the number of fuel injection holes 101 in the open state. (Reference) Figure 2 As shown, one end face of the shield 201 is the contact surface that comes into contact with the cooling oil. After the cooling oil flows out from the cooling oil groove on the motor stator core, it comes into contact with the contact surface of the shield 201. In actual use, when the oil pressure of the cooling oil is increased, the cooling oil will push the annular shield 201 to move along the second direction 103. During the movement, multiple oil injection holes 101 arranged in the same circumferential direction on the oil injection ring 1 will be exposed at the same time and be in a conductive state.

[0046] In this embodiment, combined with Figure 2 As shown, the state adjustment assembly 2 also includes a reset member 202, which drives the blocking member 201 to move in the opposite direction along the axial direction of the injection ring 1 to reset. In one feasible embodiment, the reset member 202 may be a spring 205.

[0047] Specifically, in combination Figure 2 As shown, one end of the spring 205 is connected to the blocking member 201, and the other end is connected to the fuel injection ring 1. Specifically, the blocking member 201 includes a blocking cylinder 203 and an abutting ring edge 204. The blocking cylinder 203 is sleeved on the outer wall of the fuel injection ring 1, and the abutting ring edge 204 is set at a preset angle at one end of the blocking cylinder 203, with a preset gap 206 formed between the abutting ring edge 204 and the end face of the fuel injection ring 1. Preferably, the blocking cylinder 203 and the abutting ring edge 204 are perpendicularly connected, i.e., the preset angle is 90°.

[0048] Furthermore, the spring 205 is arranged parallel to the axial direction of the fuel injection ring 1 in the preset gap 206. One end of the spring 205 is connected to the end face of the fuel injection ring 1, and the other end is connected to the abutment ring edge 204. Even further, a fixing hook is provided on the end face of the abutment ring edge 204 facing the fuel injection ring 1, and a fixing hook is also provided on the edge of the fuel injection ring 1 facing the abutment ring edge 204. Both ends of the spring 205 are respectively hung on the fixing hooks, thus fixing the spring 205 and preventing it from falling off during compression or reset.

[0049] Specifically, refer to Figure 2In the initial state, the blocking member 201 is completely fitted onto the outer wall of the injection ring 1, meaning that the blocking member 201 completely blocks or covers the injection holes 101, while the spring 205 is in a free state. When the oil pump power is increased to raise the cooling oil pressure, the cooling oil pushes the blocking member 201 to move along the second direction 103 to open a larger number of injection holes 101. At this time, the spring 205 is stretched and has elastic force due to the movement of the blocking member 201 along the second direction 103. When the oil pump power is reduced to decrease the cooling oil pressure, when the elastic force of the spring 205 is greater than the force exerted by the cooling oil on the blocking member 201, the spring 205 will drive the blocking member 201 to move along the first direction 102 under the action of the elastic force of the spring 205, thereby reducing the number of injection holes 101 in the open state.

[0050] Furthermore, multiple springs 205 can be provided, with the multiple springs 205 spaced apart along the circumferential direction at a preset gap 206. In this way, when the blocking cylinder 203 moves along the second direction 103, the circumferentially spaced springs 205 are all stretched; when the springs 205 return to their original position, the circumferentially spaced springs 205 can return to their original position simultaneously, thus enabling the blocking cylinder 203 to return to its original position quickly and stably. The springs 205 have good durability and fatigue resistance, ensuring stability and reliability during long-term operation.

[0051] By specifying the reset element 202 as spring 205 and detailing the number and arrangement of springs 205, the specific implementation details of this oil injection structure are further clarified. This setup not only maintains the working principle and advantages described previously, but also improves the stability and reliability of the entire motor stator cooling structure by increasing the number of springs 205 and their reasonable arrangement.

[0052] In summary, the oil injection structure provided in this embodiment can control the cooling oil pressure by adjusting the oil pump power, thereby driving the adjustment component to move along the axis of the oil injection ring 1. During the movement, the number of oil injection holes 101 in the conducting state can be adjusted, thereby meeting the motor's cooling oil flow requirements under different operating conditions.

[0053] Adjusting the oil pump power according to the motor's cooling requirements can effectively reduce energy consumption. Furthermore, when the oil pump power is reduced, the oil injection structure of this application reduces the system output flow by closing some oil holes, thereby ensuring stable system pressure and avoiding the problem of insufficient system pressure preventing the cooling oil from being sprayed to the areas that need cooling, resulting in unsatisfactory cooling effects.

[0054] Example 2

[0055] In this embodiment, another feasible structural solution is provided for the shielding component. Specifically, the shielding component includes multiple shielding plates sequentially spliced ​​along the circumference of the outer ring wall of the fuel injection ring 1. The shielding plates are slidably fitted against the surface of the outer ring wall of the fuel injection ring 1, and adjacent shielding plates are independently arranged. Specifically, the shielding plates are arc-shaped plates with the same curvature as the fuel injection ring 1. This design allows the arc-shaped shielding plates to slidably fit against the surface of the outer ring wall of the fuel injection ring 1, ensuring that the fuel injection holes 101 can be effectively blocked or exposed when adjusting the cooling oil flow rate. In summary, although the above provides another structural form of the shielding component 201, its working principle is consistent with that described in Embodiment 1, and will not be elaborated here.

[0056] Example 3

[0057] This application also provides a motor stator cooling system, including the aforementioned oil injection structure. Therefore, it possesses all the beneficial effects of the oil injection structure, which will not be specifically elaborated here.

[0058] Example 4

[0059] This application also provides an electric motor including the aforementioned motor stator cooling system. Therefore, it possesses all the beneficial effects of a motor stator cooling system, which will not be specifically described here.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An oil injection structure characterized by comprising: It includes an injection ring with multiple injection holes and a state adjustment assembly for adjusting the number of injection holes in the conducting state on the injection ring; The state adjustment component includes a blocking component and a reset component; The blocking member is configured to cooperate with the outer ring wall of the fuel injection ring; the blocking member can move relative to the fuel injection ring along the axial direction of the fuel injection ring to adjust the number of fuel injection holes in the conducting state; The reset component drives the blocking component to move axially along the fuel injection ring to reset.

2. The fuel injection structure of claim 1, wherein The shielding component is annular in shape and is fitted onto the outer wall of the fuel injection ring with a clearance fit.

3. The fuel injection structure of claim 1, wherein The shielding component includes multiple shielding pieces sequentially spliced ​​along the circumference of the outer ring wall of the fuel injection ring, and the shielding pieces are slidably attached to the surface of the outer ring wall of the fuel injection ring.

4. The fuel injection structure of claim 1 wherein, The reset component includes a spring, one end of which is connected to the shield and the other end is connected to the fuel injection ring.

5. The oil spraying structure as described in claim 4, characterized in that, The spring is arranged parallel to the axial direction of the fuel injection ring, with one end of the spring connected to the end face of the fuel injection ring and the other end connected to the end face of the shield.

6. The oil spraying structure as described in claim 1, characterized in that, The injection holes are distributed in multiple rows along the axial direction of the injection ring, and each row of injection holes is distributed circumferentially along the injection ring.

7. A motor stator cooling system, characterized in that, Including the oil spraying structure as described in any one of claims 1-6.

8. An electric motor, characterized in that, Includes the motor stator cooling system as described in claim 7.

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