A spraying verification tool and spraying verification system

Abstract

The embodiment of the application discloses a spraying verification tool and a spraying verification system. The tool is used for verifying the spraying characteristics of an experimental sheet, and the experimental sheet is provided with an oil injection hole. The tool comprises an oil inlet pipe, a base and a metering plate. The oil inlet pipe is used for connecting an oil pump; the base is provided with a first oil inlet hole; and the surface of the metering plate is provided with a line segment feature for indicating the spraying characteristics. The base and the metering plate are provided with a containing cavity, the experimental sheet is arranged in the containing cavity, and the oil inlet pipe, the first oil inlet hole and the oil injection hole are sequentially in fluid communication, so that the fluid can be sprayed to the metering plate through the oil injection hole. The tool has the advantages of simple structure, convenient installation, good experimental accuracy, high test efficiency, rapid iteration and optimization of the oil injection structure in the early development stage and low research and development cost. The spraying verification system has the spraying verification tool and all the advantages of the spraying verification tool.

Description

Technical Field

[0001] This utility model relates to the field of spray verification technology, and in particular to a spray verification tooling and spray verification system. Background Technology

[0002] Motors for new energy vehicles are trending towards higher power and more compact designs. Traditional stator designs with oil holes on the outer periphery of the iron core and end oil collecting rings no longer meet these development trends. Therefore, a stator core with a self-injecting oil structure has been developed. Cooling oil flowing through the end oil holes is sprayed onto the windings at specific axial and tangential angles. The cooling performance of this injection structure depends on complex fluid behavior; therefore, repeated adjustments and optimizations using fluid simulation and spray experiments are necessary during the design process to achieve the ideal injection angle and flow distribution.

[0003] However, the existing design process has many problems: on the one hand, the simulation model is complex to build and has limited accuracy, making it difficult to accurately predict oil flow behavior; on the other hand, the experimental tooling manufacturing and testing process is costly and time-consuming, which seriously restricts the development efficiency and application promotion of the new structure.

[0004] Therefore, there is an urgent need for a new spray verification tool and spray verification system. Utility Model Content

[0005] The purpose of this invention is to provide a spray verification fixture and system. This fixture, through the cooperation of a base and a metering plate, constructs a chamber structure to accommodate the experimental sample, allowing for experimental evaluation of the spray characteristics of the oil injection holes under controlled conditions. Simultaneously, the oil inlet pipe connects to an external oil pump, simulating the oil flow state under actual operating conditions, allowing fluid to be sprayed onto the surface of the metering plate through the injection holes. Furthermore, the metering plate surface has line segment features, facilitating intuitive judgment of the coverage, direction, and distribution characteristics of the oil spray, thereby enabling rapid evaluation of the spray angle and spray effect. This fixture has a simple structure, is easy to install, possesses good experimental accuracy and high testing efficiency, and is conducive to rapid iteration and optimization of the oil spray structure in the early stages of development, reducing R&D costs.

[0006] This application discloses a spray verification fixture for verifying the spray characteristics of an experimental piece, wherein the experimental piece has an oil spray hole, including:

[0007] Oil inlet pipe, used for connecting an external oil pump;

[0008] The base has a first oil inlet hole; and

[0009] Metering plate with line segment features on its surface to indicate spray characteristics;

[0010] The base and the metering plate are provided with a accommodating chamber, the experimental piece is arranged in the accommodating chamber, and the oil inlet pipe, the first oil inlet hole and the oil spray hole are in sequential fluid communication so that the fluid can be sprayed onto the metering plate through the oil spray hole.

[0011] Furthermore, the metering plate includes a base plate and a spray section arranged perpendicularly to each other. The line segment feature is located in the spray section. The accommodating chamber is located between the base plate and the base. A second oil inlet hole is provided in the base plate. The oil inlet pipe, the first oil inlet hole, the oil spray hole and the second oil inlet hole are in sequential fluid communication so that fluid can be sprayed onto the spray section through the oil spray hole.

[0012] Furthermore, the line segment feature is a raised feature, a groove feature, or a coating feature, and the line segment feature includes at least a vertical line segment, a horizontal line segment, and a scale segment, wherein the vertical line segment and the horizontal line segment are arranged alternately, and the scale segment is located at the end position of the vertical line segment and / or the horizontal line segment.

[0013] Furthermore, the spray section has a square plate-like structure, and the plane on the surface of the spray section is defined as the projection reference plane. The forward projection of the oil injection hole on the projection reference plane is the first projection, and the first projection is located at the middle position of the surface of the spray section.

[0014] Furthermore, the second oil inlet has a guiding area and a clearance area located on the same plane. The guiding area can communicate with the oil injection hole, and the clearance area extends outward in opposite directions along the position of the guiding area to avoid the flow path of the fluid.

[0015] Furthermore, the cross-section of the second oil inlet is triangular, and the conductive area is located in a local area corresponding to one of the corners of the second oil inlet.

[0016] Furthermore, a positioning head is connected to the side of the base plate away from the spray section, and the base is provided with a positioning groove that is compatible with the positioning head; wherein, through the cooperation of the positioning head and the positioning groove, the base plate and the base are relatively fixed.

[0017] Furthermore, the spray verification fixture also includes a positioning pin. The base, the experimental piece, and the bottom plate are respectively provided with a first mating hole, a second mating hole, and a third mating hole that are adapted to the positioning pin. The positioning pin can be sequentially inserted into the first mating hole, the second mating hole, and the third mating hole.

[0018] Furthermore, it also includes fastening bolts that can be sequentially inserted through the base, the experimental piece, and the measuring plate to fix the experimental piece in the accommodating chamber.

[0019] Furthermore, it also includes a housing that covers the metering plate and the base.

[0020] Furthermore, an oil outlet is provided on one side of the housing.

[0021] Furthermore, the shell is a transparent shell.

[0022] This application further discloses a spray verification system, which includes:

[0023] Experimental films; and

[0024] The above-mentioned spray verification fixture;

[0025] The experimental piece is a stator laminate.

[0026] Furthermore, there are multiple stator laminations, which are arranged in a stacked manner and simultaneously disposed in the accommodating chamber.

[0027] The spray verification fixture and spray verification system provided by this utility model have at least the following beneficial effects, including but not limited to:

[0028] 1) This fixture, through the cooperation of the base and the metering plate, constructs a chamber structure to accommodate the experimental sample, enabling experimental evaluation of the spray characteristics of the injection holes in a controlled environment. Simultaneously, the oil inlet pipe connects to an external oil pump, simulating the oil flow state under actual operating conditions, allowing fluid to be sprayed onto the surface of the metering plate through the injection holes. Furthermore, the metering plate surface features line segments, facilitating intuitive judgment of the oil spray coverage, direction, and distribution characteristics, thereby enabling rapid evaluation of the spray angle and spray effect. This fixture has a simple structure, is easy to install, possesses good experimental accuracy and high testing efficiency, and is conducive to rapid iteration and optimization of the oil spray structure in the early stages of development, reducing R&D costs.

[0029] 2) The spray verification fixture adopts a structural design including a positioning head, positioning groove, positioning pin, and fastening bolts, which can realize precise positioning and detachable connection between the experimental piece, base, and metering plate. Its assembly method improves the assembly accuracy and replacement convenience of the fixture, enabling experimental personnel to quickly replace experimental pieces of different types or different spray hole structures, significantly improving experimental flexibility and the reuse rate of the fixture.

[0030] 3) In this spray verification fixture, the second oil inlet hole adopts a structure with a conduction area and a avoidance area, especially a triangular cross-section, which allows the fluid to be smoothly sprayed out along the preset oil spray hole direction without being blocked or interfered with by the structure. This ensures the integrity and freedom of the spray direction, and allows the spray to be sprayed to the spray section (winding simulation area) at a certain axial and tangential angle according to the design requirements. This structural feature matches the angle setting of the cooling oil spray winding in the actual motor stator operation, which enhances the simulation capability of the spray verification fixture for real working conditions, thereby improving the reference value and experimental credibility of the oil spray structure design verification. Attached Figure Description

[0031] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0032] Figure 1 This is a schematic diagram of the structure of the spray verification fixture provided in the embodiments of this application;

[0033] Figure 2 An exploded view of the spray verification fixture provided in the embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the structure of the metering plate provided in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the structure of the experimental piece provided in the embodiments of this application;

[0036] Figure 5 This is a schematic diagram of a spraying experiment provided in an embodiment of this application.

[0037] Icon: 100-Sprayer verification fixture;

[0038] 11-Base; 111-First oil inlet; 112-Positioning groove; 113-First mating hole;

[0039] 12-Metering plate; 121-Base plate; 1211-Second oil inlet; 12111-Conducting area; 12112-Avoidance area; 122-Spray section; 1221-Vertical line segment; 1222-Horizontal line segment; 1223-Scale section; 123-Positioning head; 124-Third mating hole;

[0040] 13- Oil inlet pipe;

[0041] 14-Housing shell; 141-Oil outlet;

[0042] 15-Positioning pin;

[0043] 200 - Experimental piece; 21 - Oil injection hole; 22 - Second mating hole. Detailed Implementation

[0044] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0045] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] Please refer to Figures 1-5 This application discloses a spray verification fixture 100, which is used to verify the spray characteristics of an experimental piece 200. The experimental piece 200 has an oil spray hole 21. Specifically, the fixture includes an oil inlet pipe 13, a base 11, and a metering plate 12. The oil inlet pipe 13 is used to connect an external oil pump; the base 11 has a first oil inlet hole 111; the surface of the metering plate 12 has line segment features to indicate spray characteristics; wherein, there is a accommodating chamber (not shown in the figure) between the base 11 and the metering plate 12, the experimental piece 200 is arranged in the accommodating chamber, and the oil inlet pipe 13, the first oil inlet hole 111, and the oil spray hole 21 are in sequential fluid communication so that fluid (which can be oil in this embodiment) can be sprayed onto the metering plate 12 through the oil spray hole 21.

[0047] It should be noted that the accommodating chamber refers to the sealed or semi-sealed space formed by the structural gap between the base 11 and the metering plate 12. Because this chamber... Figure 1 The middle part is obscured by the base 11 and the metering plate 12, so it is not clearly marked in the figure. In addition, it should be understood that the fluid in this embodiment is not limited to oil, and other types of fluid media, such as coolant, test fluid, etc., can be selected according to the test requirements to simulate the spraying behavior under different working conditions.

[0048] It is worth noting that this fixture, through the cooperation of the base 11 and the metering plate 12, constructs a chamber structure to accommodate the experimental piece 200, allowing the spray characteristics of the oil injection hole 21 to be experimentally evaluated in a controlled environment. Simultaneously, the oil inlet pipe 13 connects to an external oil pump, simulating the oil flow state under actual operating conditions, allowing the fluid to be sprayed onto the surface of the metering plate 12 through the oil injection hole 21. Furthermore, the surface of the metering plate 12 has line segment features, facilitating a direct and intuitive assessment of the oil spray coverage, direction, and distribution characteristics, thereby enabling rapid evaluation of the spray angle and spray effect. This fixture has a simple structure, is easy to install, possesses good experimental accuracy and high testing efficiency, and is conducive to rapid iteration and optimization of the oil spray structure in the early stages of development, reducing R&D costs.

[0049] Please refer to this again. Figure 1 The metering plate 12 includes a base plate portion 121 and a spray portion 122 arranged perpendicularly to each other. The line segment feature is located in the spray portion 122. The accommodating chamber is located between the base plate portion 121 and the base 11. A second oil inlet hole 1211 is provided in the base plate portion 121. The oil inlet pipe 13, the first oil inlet hole 111, the oil spray hole 21 and the second oil inlet hole 1211 are in sequential fluid communication so that the fluid can be sprayed to the spray portion 122 through the oil spray hole 21.

[0050] It is worth noting that the base plate 121 and the spray section 122 are arranged perpendicularly, placing the spray section 122 in a position perpendicular to the oil spray direction. This facilitates the reception of cooling oil flow from the oil injection holes 21 along the axial and tangential directions, thereby more accurately simulating the spray angle of the winding area during oil cooling in actual motor operation. Furthermore, by arranging the base plate 121 and the spray section 122 perpendicularly, not only can the functional zoning be clearly defined (the base plate 121 serves as a support and oil passage, while the spray section 122 serves as an observation interface), but the entire fixture is also easier to modularly design and disassemble, thus improving experimental efficiency.

[0051] Please refer to this again. Figure 3 The line segment features are raised features, groove features, or coating features, and the line segment features include at least a vertical line segment 1221, a horizontal line segment 1222, and a scale segment 1223. The vertical line segment 1221 and the horizontal line segment 1222 are arranged alternately, and the scale segment 1223 is located at the end of the vertical line segment 1221 and / or the horizontal line segment 1222.

[0052] It is worth noting that by combining vertical line segments 1221, horizontal line segments 1222, and scale segments 1223 using different forms of line segment features such as protrusions, grooves, or coatings, and staggering them on the surface of the spray section 122, the coverage area, offset direction, and diffusion characteristics of the sprayed oil can be visually marked. The "wetting marks" formed by the oil on the surface after spraying will contrast with the grid lines, making the spray position easier to observe and record, and improving the accuracy of judgment.

[0053] It is also worth noting that, such as Figure 3 As shown, the spray section 122 has a vertical scale of 0–68° and a horizontal scale of 0–45°. This scale is calculated based on the vertical and horizontal distances from the oil injection hole 21 to the spray section 122. When oil is sprayed from the oil injection hole 21 and directed towards the spray section 122, the vertical and horizontal angles of the spray can be read by observing the scale position in which the oil points, thus enabling rapid and visual judgment of the spray direction. It should be understood that the range and intervals of the scale can be flexibly adjusted according to the actual usage environment to adapt to different structural dimensions and spray requirements.

[0054] Please refer to the following at the same time Figure 2 and Figure 3 The spray section 122 has a square plate-shaped structure. The plane on the surface of the spray section 122 is defined as the projection reference plane. The forward projection of the oil injection hole 21 on the projection reference plane is the first projection. The first projection is located at the middle position of the surface of the spray section 122.

[0055] It is worth noting that the forward projection of the oil injection hole 21 is located at the center of the spray section 122. This facilitates the uniform expansion of the spray range in all directions, preventing oil from concentrating at the edges or corners and causing evaluation distortion. This helps in accurately analyzing the spray angle and coverage effect. Furthermore, the central arrangement provides a symmetrical benchmark, making it easier to structurally compare the spray effects in the left / right and up / down directions, improving the repeatability and comparability of angle adjustment and coverage analysis. In conjunction with line segment characteristics, such as... Figure 3 As shown, by arranging the scale with the center as the origin (e.g., the left and right sides of the horizontal scale are both 0-45°), a complete and symmetrical measurement coordinate system can be constructed, which makes it easy to read the precise angle by the direction of the oil trace and improves the evaluation accuracy of the injection direction.

[0056] Please refer to this again. Figure 2 and Figure 5 The second oil inlet 1211 has a guiding area 12111 and a clearance area 12112 located on the same plane. The guiding area 12111 can communicate with the oil injection hole 21. The clearance area 12112 extends outward along the position of the guiding area 12111 in opposite directions to avoid the flow path of the fluid.

[0057] In this embodiment, the cross-section of the second oil inlet 1211 is triangular, and the conducting area 12111 is located in a local area corresponding to one of the corners of the second oil inlet 1211.

[0058] It is worth noting that the second oil inlet 1211 adopts a structure with a conducting area 12111 and a clearance area 12112, especially a triangular cross-section, which allows the fluid to be smoothly sprayed out along the preset oil injection hole 21 without being blocked or interfered with by the structure. This ensures the integrity and freedom of the spray direction, allowing the spray to be sprayed to the spray section 122 (winding simulation area) at a certain axial and tangential angle according to the design requirements. This structural feature matches the angle setting of the cooling oil spray winding in the actual operation of the motor stator, enhancing the simulation capability of the spray verification fixture 100 for real working conditions, thereby improving the reference value and experimental credibility of the oil injection structure design verification.

[0059] It should also be noted that the cross-section of the second oil inlet 1211 can also be circular, square, or irregular, as long as its corresponding clearance area 12112 extends outward along the position of the conduction area 12111 in the opposite directions. This embodiment does not constitute a limitation on the specific structure of the second oil inlet 1211, but is only an example of its preferred structure.

[0060] In this embodiment, a positioning head 123 is also connected to the side of the base plate 121 opposite to the spray section 122, and the base 11 is provided with a positioning groove 112 that is compatible with the positioning head 123; wherein, through the cooperation of the positioning head 123 and the positioning groove 112, the base plate 121 and the base 11 are relatively fixed. It can be understood that... Figure 2 As shown, the positioning head 123 can be a square head, which has a better pre-positioning effect than a round head, and can ensure the accuracy of the fit between the base 11 and the base plate 121.

[0061] In this embodiment, the spray verification fixture 100 also includes a positioning pin 15. The base 11, the experimental piece 200 and the base plate 121 are respectively provided with a first mating hole 113, a second mating hole 22 and a third mating hole 124 that are adapted to the positioning pin 15. The positioning pin 15 can be sequentially inserted into the first mating hole 113, the second mating hole 22 and the third mating hole 124.

[0062] In this embodiment, a fastening bolt (not shown in the figure) is also included. The fastening bolt can be sequentially inserted through the base 11, the experimental piece 200, and the measuring plate 12 to fix the experimental piece 200 in the receiving chamber. It can be understood that the bolt holes corresponding to the fastening bolts are... Figure 2 The through-hole structure shown at the four corners of the middle base plate 121 and the base 11 is used to provide guidance and fixed support for the installation of fastening bolts, which facilitates assembly and disassembly operations, and also facilitates the quick replacement and repeated testing of the experimental piece 200, thereby improving experimental efficiency.

[0063] It is worth noting that the spray verification fixture 100 adopts a structural design including a positioning head 123, a positioning groove 112, a positioning pin 15, and fastening bolts, which can realize precise positioning and detachable connection between the experimental piece 200, the base 11, and the metering plate 12. Its assembly method improves the assembly accuracy and replacement convenience of the fixture, enabling experimental personnel to quickly replace experimental pieces 200 of different types or different spray hole structures, significantly improving experimental flexibility and the reusability of the fixture.

[0064] Please refer to this again. Figure 1 and Figure 2 The tooling also includes a housing 14, which covers the measuring plate 12 and the base 11.

[0065] It is worth noting that the housing 14 is set outside the metering plate 12 and the base 11, which can effectively prevent oil from splashing or leaking outside the test area during the spray test, thereby improving the cleanliness and safety of the test environment.

[0066] Optionally, an oil outlet 141 is provided on one side of the housing 14.

[0067] Specifically, the oil outlet 141 is located at the bottom to facilitate the outflow of oil.

[0068] In this embodiment, the housing 14 is a transparent housing. It is understood that the structure of the housing 14 can be made of transparent material as needed, so that the operator can observe the spraying effect and liquid distribution in real time without disassembling the tooling, thereby further improving the convenience and efficiency of the test.

[0069] This application further discloses a spray verification system, which includes an experimental piece 200 and the aforementioned spray verification fixture 100. The experimental piece 200 is a stator lamination.

[0070] It is understandable that, such as Figure 4 As shown, stator laminations, due to their simple structure, have the advantages of simple preparation and low cost, significantly optimizing experimental costs. Furthermore, this spray verification system simulates the oil circuit design of a stator core with a self-spraying oil structure, enabling rapid verification of the oil spraying effect without the need to prepare the entire core and shell 14, thus greatly improving verification efficiency while ensuring the accuracy of experimental results.

[0071] It should be noted that the experimental piece 200 can also be other sheet-like structures, so that the spray verification fixture 100 can also perform rapid verification of related requirements such as the oil spray angle of the oil collecting ring and the oil spray effect of the cooling system of the motor housing 14.

[0072] Optionally, there are multiple stator laminations, which are arranged in a stacked manner and simultaneously placed in the receiving chamber.

[0073] Specifically, by using multiple stator laminations, the oil spraying effect after adding or removing laminations during the core production process can be simulated, effectively reducing the scrap rate during core production.

[0074] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0075] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of this application. However, those skilled in the art will recognize that embodiments of this invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of this application.

[0076] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments described herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0077] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0078] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0079] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0080] The above description of the embodiments shown in this utility model (including the content in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments of this application, and such modifications will be within the spirit and scope of the utility model.

[0081] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of the embodiments of this application. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring various aspects of the embodiments of this application.

Claims

1. A spray verification fixture for verifying the spray characteristics of an experimental piece, wherein the experimental piece has an oil spray hole, characterized in that, include: Oil inlet pipe, used for connecting an external oil pump; The base has a first oil inlet hole; and Metering plate with line segment features on its surface to indicate spray characteristics; The base and the metering plate are provided with a accommodating chamber, the experimental piece is arranged in the accommodating chamber, and the oil inlet pipe, the first oil inlet hole and the oil spray hole are in sequential fluid communication so that the fluid can be sprayed onto the metering plate through the oil spray hole.

2. The spray verification fixture according to claim 1, characterized in that, The metering plate includes a base plate and a spray section arranged perpendicularly to each other. The line segment feature is located in the spray section. The accommodating chamber is located between the base plate and the base. A second oil inlet hole is provided in the base plate. The oil inlet pipe, the first oil inlet hole, the oil spray hole and the second oil inlet hole are in sequential fluid communication so that fluid can be sprayed onto the spray section through the oil spray hole.

3. The spray verification fixture according to claim 1 or 2, characterized in that, The line segment feature is a raised feature, a groove feature, or a coating feature, and the line segment feature includes at least a vertical line segment, a horizontal line segment, and a scale segment. The vertical line segment and the horizontal line segment are arranged alternately, and the scale segment is located at the end of the vertical line segment and / or the horizontal line segment.

4. The spray verification fixture according to claim 2, characterized in that, The spray section has a square plate-like structure. The plane on which the surface of the spray section is located is defined as the projection reference plane. The forward projection of the oil injection hole on the projection reference plane is the first projection. The first projection is located at the middle position of the surface of the spray section.

5. The spray verification fixture according to claim 2, characterized in that, The second oil inlet has a guiding area and a clearance area located on the same plane. The guiding area can communicate with the oil injection hole, and the clearance area extends outward in opposite directions along the position of the guiding area to avoid the flow path of the fluid.

6. The spray verification fixture according to claim 5, characterized in that, The cross-section of the second oil inlet is triangular, and the conductive area is located in a local area corresponding to one of the corners of the second oil inlet.

7. The spray verification fixture according to claim 2, characterized in that, A positioning head is also connected to the side of the base plate away from the spray section, and the base is provided with a positioning groove that is compatible with the positioning head; wherein, through the cooperation of the positioning head and the positioning groove, the base plate and the base are relatively fixed.

8. The spray verification fixture according to claim 2, characterized in that, The spray verification fixture also includes a positioning pin. The base, the experimental piece, and the bottom plate are respectively provided with a first mating hole, a second mating hole, and a third mating hole that are adapted to the positioning pin. The positioning pin can be sequentially inserted into the first mating hole, the second mating hole, and the third mating hole.

9. The spray verification fixture according to claim 1, characterized in that, It also includes fastening bolts that can be sequentially inserted through the base, the experimental piece, and the measuring plate to fix the experimental piece in the accommodating chamber.

10. The spray verification fixture according to claim 1, characterized in that, It also includes a housing that covers the metering plate and the base.

11. The spray verification fixture according to claim 10, characterized in that, An oil outlet is provided on one side of the housing.

12. The spray verification fixture according to claim 10, characterized in that, The shell is a transparent shell.

13. A spray verification system, characterized in that, include: Experimental film; and Spraying verification fixture as described in any one of claims 1-12; The experimental piece is a stator laminate.

14. The spray verification system according to claim 13, characterized in that, The number of stator laminations is multiple, and the multiple stator laminations are arranged in a stacked manner and are simultaneously arranged in the accommodating chamber.

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