Cooling oil flow testing device

Abstract

The utility model relates to a cooling oil flow testing device. The cooling oil flow testing device comprises a first testing device which comprises a first shell and a driving part, and the first shell is used for accommodating a rotor; the driving part is used for driving the rotor to rotate; the second testing device comprises a second shell, and the second shell is used for accommodating the cooling oil pipe; the cooling oil pipe is arranged on the stator; the first conveying pipeline is used for being communicated with a cooling oil way of the rotor so as to convey cooling oil; the first flow meter is configured to be capable of measuring the flow of cooling oil on the first conveying pipeline; the second conveying pipeline is used for being communicated with the cooling oil pipe so as to convey the cooling oil; the second flow meter is configured to be capable of measuring the flow of the cooling oil on the second conveying pipeline. According to the technical scheme, the accuracy of measuring the flow of the cooling oil can be improved, and reference is provided for design of a motor cooling system.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a cooling oil flow testing device. Background Art

[0002] The motor cooling system mostly adopts oil cooling, but due to the large number of components involved in the motor, it is currently impossible to accurately measure the amount of cooling oil required by each component, which is not conducive to designing the motor cooling system to achieve a better cooling effect for the motor. Utility Model Content

[0003] Based on this, a cooling oil flow test device is provided to improve the accuracy of measuring the cooling oil flow and provide a reference for the design of the motor cooling system.

[0004] According to one aspect of the present application, a cooling oil flow test device is provided, comprising:

[0005] The first testing device comprises a first housing and a driving member, wherein the first housing is used to accommodate the rotor; and the driving member is used to drive the rotor to rotate;

[0006] The second testing device comprises a second housing, the second housing is used to accommodate a cooling oil pipe; the cooling oil pipe is used to be arranged on the stator;

[0007] a first delivery pipeline and a first flowmeter, the first delivery pipeline being connected to a cooling oil path of the rotor to deliver cooling oil; the first flowmeter being configured to measure a flow rate of the cooling oil on the first delivery pipeline; and

[0008] The second delivery pipeline and the second flow meter, the second delivery pipeline is used to connect to the cooling oil pipe to deliver the cooling oil; the second flow meter is configured to measure the flow of the cooling oil on the second delivery pipeline.

[0009] In one of the embodiments, the cooling oil flow rate testing device further includes a total delivery pipeline and a total flow meter;

[0010] The main delivery pipeline is connected to the first delivery pipeline and the second delivery pipeline respectively, so as to deliver cooling oil to the first delivery pipeline and the second delivery pipeline respectively; the total flow meter is configured to measure the total flow of cooling oil on the main delivery pipeline.

[0011] In one embodiment, the cooling oil flow test device has a first test state and a second test state; in the first test state and the second test state, the total flow recorded by the total flow meter is the same;

[0012] In a first test state, the driving member is used to drive the rotor to rotate at a first preset speed so that the first flow meter records a first flow rate and the second flow meter records a second flow rate;

[0013] In the second test state, the driving member is used to drive the rotor to rotate at a second preset speed so that the first flow meter records the third flow rate and the second flow meter records the fourth flow rate;

[0014] The second preset speed is greater than the first preset speed; the third flow rate is greater than the first flow rate, and the fourth flow rate is less than the second flow rate.

[0015] In one of the embodiments, the first preset rotational speed is configured as zero; the second preset rotational speed is configured as a constant value, or is configured as a rotational speed with an increasing trend.

[0016] In one embodiment, a plurality of groups of first oil holes are provided in the cooling oil path of the rotor; a plurality of first cavities are provided in isolation in the first housing; each first cavity is used to accommodate a group of first oil holes to collect cooling oil leaked from the group of first oil holes;

[0017] The cooling oil flow testing device further comprises a plurality of first output pipes and a plurality of third flow meters; one end of each first output pipe is passed through the bottom wall of a first cavity, and the other end is connected to a third flow meter.

[0018] In one embodiment, the first shell has two openings arranged along a first direction and a cavity communicating with the two openings;

[0019] The first testing device further includes a first covering member, a plurality of blocking members, and a second covering member which are sequentially arranged in intervals along the first direction, the first covering member being arranged at an opening of the first shell along the first direction, and the second covering member being arranged at another opening of the first shell along the first direction; the plurality of blocking members being arranged in the cavity of the first shell;

[0020] The first cavity is formed by the spaces between the first covering member, the plurality of blocking members and the second covering member.

[0021] In one embodiment, the first cover member is used to fix one end of the rotor, and the second cover member is used to fix the other end of the rotor;

[0022] A first oil filling hole is provided on any one of the first cover member and the second cover member, and the first oil filling hole is used to connect to the cooling oil path of the rotor.

[0023] In one embodiment, the cooling oil pipe is provided with a plurality of second oil holes along the extension direction of the central axis thereof; the second testing device further comprises a partition, which is arranged in the second shell body so as to divide the second shell body into a plurality of second cavities; each second cavity is arranged toward a second oil hole so as to collect cooling oil leaked from the second oil hole;

[0024] The cooling oil flow testing device further comprises a plurality of second output pipes and a plurality of fourth flow meters; one end of each second output pipe is passed through the bottom wall of a second cavity, and the other end is connected to a fourth flow meter.

[0025] In one embodiment, the second housing has two side walls arranged opposite to each other along the first direction, and the two side walls are used for the two ends of the cooling oil pipe to pass through and fix;

[0026] The partition comprises a plurality of first connecting plates arranged at intervals along a first direction and a second connecting plate arranged along a second direction; the plurality of first connecting plates penetrate the second connecting plates to form a plurality of second cavities in the second shell;

[0027] The first direction and the second direction are perpendicular to each other, and the second direction is parallel to the extending direction of the side wall.

[0028] In one of the embodiments, the partition further includes a third connecting plate arranged along a third direction;

[0029] One end of the plurality of first connecting plates and the second connecting plates away from the bottom wall of the second shell along the second direction is penetrated through the third connecting plate to divide the third connecting plate into a plurality of areas;

[0030] A through hole is provided on each area of ​​the third connecting plate, each through hole corresponds to a second oil hole and is located on the oil leakage path of the corresponding second oil hole.

[0031] In the above cooling oil flow test device, the cooling oil flow test device at least includes a first test device, a second test device, a first delivery pipeline, a first flow meter, a second delivery pipeline and a second flow meter; the first test device includes a first housing and a driving member, the first housing is used to accommodate the rotor; the driving member is used to drive the rotor to rotate; the second test device includes a second housing, the second housing is used to accommodate the cooling oil pipe; the cooling oil pipe is used to be set on the stator; the first delivery pipeline is used to connect the cooling oil path of the rotor to transport the cooling oil; the first flow meter is configured to measure the flow of the cooling oil on the first delivery pipeline; the second delivery pipeline is used to connect the cooling oil pipe to transport the cooling oil; the second flow meter is configured to measure the flow of the cooling oil on the second delivery pipeline. In this way, when the rotor is at different speeds, the flow of the cooling oil required by the rotor can be recorded by the first flow meter, and the flow of the cooling oil required by the stator can be recorded by the second flow meter, so that the flow of the cooling oil required by the rotor and the stator under different working conditions can be more accurately measured, providing a reference for the design of the motor cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. 1 is a schematic diagram of the exploded structure of the motor cooling system in the present application.

[0033] FIG2 is a schematic cross-sectional view of the motor cooling system in the present application.

[0034] FIG. 3 is a schematic cross-sectional structural diagram of the rotor in FIG. 2 .

[0035] FIG. 4 is a schematic cross-sectional structural diagram of the stator in FIG. 2 .

[0036] FIG. 5 is a schematic cross-sectional structural diagram of the end cover in FIG. 2 .

[0037] FIG. 6 is a structural schematic diagram of a cooling oil flow testing device in an embodiment of the present application.

[0038] FIG. 7 is a schematic cross-sectional view of the first testing device in FIG. 6 when testing a rotor.

[0039] FIG. 8 is a schematic diagram of a partially exploded structure of the first testing device in FIG. 7 .

[0040] FIG. 9 is a schematic diagram of the exploded structure of the second testing device in FIG. 6 when testing the cooling oil pipe.

[0041] FIG. 10 is a schematic side view of the second testing device in FIG. 6 when testing a cooling oil pipe.

[0042] FIG. 11 is a schematic diagram of a portion of the structure of the second testing device in FIG. 9 .

[0043] FIG. 12 is a schematic diagram of another partial structure of the second testing device in FIG. 9 .

[0044] FIG. 13 is a schematic diagram of another partial structure of the second testing device in FIG. 9 .

[0045] FIG. 14 is a schematic diagram of a simulation structure when simulating an end cover in a cooling oil flow rate test method according to an embodiment of the present application.

[0046] Description of Figure Numbers:

[0047] Motor oil cooling system 100;

[0048] Housing 110; rotor 120, front bearing 121, rear bearing 122, rotor oil passage 120a, first oil leakage hole 120b; stator 130, stator oil passage 130a; cooling oil pipe 140, fixing plate 141, positioning hole 141a, second oil leakage hole 140a; end cover 150; total oil inlet hole N, first oil inlet hole n1, second oil inlet hole n2;

[0049] Cooling oil flow testing device 200;

[0050] A first testing device 210, a first housing 211, a first cavity 211a, a driving member 212, a first covering member 213, a blocking member 214, a second covering member 215, a first oil filling hole w1, a first oil outlet t1, a stopper structure a1, and a thrust structure a2;

[0051] The second testing device 220, the second housing 221, the second cavity 221a, the fixing hole 221b, the partition 222, the first connecting plate 222a, the second connecting plate 222b, the third connecting plate 222c, the fixing member 223, the fixing stop 223a, the fixing port 223b, the connecting hole 223c, the second oil filling hole w2, the second oil outlet hole t2, and the through hole u1;

[0052] A first flow meter k1, a second flow meter k2, a total flow meter k3, a third flow meter k4, and a fourth flow meter k5;

[0053] A first delivery pipeline L1, a second delivery pipeline L2, a main delivery pipeline L3, a first output pipeline L4, and a second output pipeline L5;

[0054] Oil pump 230;

[0055] Fuel tank 240;

[0056] The first direction F1 and the second direction F2. DETAILED DESCRIPTION

[0057] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0058] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0059] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0061] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0063] To facilitate the introduction of the cooling oil flow rate testing device according to the embodiment of the present application, an exemplary description is first given of the application situations in which the cooling oil flow rate testing device according to the embodiment of the present application is applied.

[0064] Figure 1 shows a schematic diagram of the decomposed structure of the motor cooling system in the present application, Figure 2 shows a schematic diagram of the cross-sectional structure of the motor cooling system in the present application, Figure 3 shows a schematic diagram of the cross-sectional structure of the rotor in Figure 2, Figure 4 shows a schematic diagram of the cross-sectional structure of the stator in Figure 2, and Figure 5 shows a schematic diagram of the cross-sectional structure of the end cover in Figure 2. For ease of explanation, only the content related to the embodiments of the present application is shown.

[0065] 1 to 5, in the embodiment of the present application, the motor oil cooling system 100 includes a housing 110, a rotor 120, a stator 130, a cooling oil pipe 140 and an end cover 150, and the cooling oil pipe 140 is arranged on the stator 130. In the highly integrated motor oil cooling system 100, the rotor oil circuit 120a and the stator oil circuit 130a generally use the same set of oil pumps to supply oil, the total oil inlet hole N of the motor oil cooling system 100 is set to one, and the stator oil circuit 130a and the rotor oil circuit 120a are structurally related.

[0066] When the motor oil cooling system 100 is working, oil enters from the total oil inlet hole N of the end cover 150, a part of the oil enters the first oil inlet hole n1 of the rotor 120, and the oil is thrown out from a part of the first oil leakage holes 120b to lubricate the front bearing 121 / rear bearing 122, and the oil is thrown out from another part of the first oil leakage holes 120b to cool the related structures (such as copper wires) at the end of the stator 130; another part of the oil enters the second oil inlet hole n2 of the cooling oil pipe 140 on the stator 130, and the stator 130 is sprayed with oil from multiple second oil leakage holes 140a on the cooling oil pipe 140.

[0067] After analysis, the inventor found that, assuming that the initial oil inlet of the end cover 150 is constant and the rotational speed of the rotor 120 is a constant value, the oil inlet of the rotor 120 is M1, and the oil inlet of the cooling oil pipe 140 is M2. M2 can be regarded as the oil inlet required for cooling the stator 130. When the rotational speed of the rotor 120 is higher, due to the centrifugal force, it is easier for the oil to be thrown out of the oil path of the rotor 120, and the internal flow resistance becomes smaller. The oil inlet of the rotor 120 M1 becomes larger, and the oil inlet of the oil pipe M2 becomes smaller.

[0068] It should be noted that the performance of the motor is strongly related to the temperature of the stator and rotor. At present, the new energy parameters of the motor can be measured by a dynamometer, and sensors are arranged on the stator and rotor of the motor to measure the temperature. However, the flow at each position in the system is currently mainly completed by flow simulation. Due to the addition of the influence of the rotation system, in the highly integrated motor oil cooling system 100, the oil distribution is more complicated and the simulation difficulty increases. The risk of differences between the simulation results and the actual effects increases.

[0069] Based on this, an embodiment of the present application provides a cooling oil flow testing device to achieve detailed measurement of the cooling flow of oil holes at various positions on the motor, complete the flow simulation closed loop, accumulate test data to improve the simulation method, and provide a reliable reference for the design of the motor oil cooling system 100.

[0070] Referring to FIG. 6, FIG. 6 shows a schematic diagram of the structural principle of a cooling oil flow test device in an embodiment of the present application. A cooling oil flow test device 200 provided in an embodiment of the present application includes a first test device 210, a second test device 220, a first delivery pipeline L1, a first flow meter k1, a second delivery pipeline L2, and a second flow meter k2. The first test device 210 includes a first housing 211 and a driving member 212, and the first housing 211 is used to accommodate the rotor 120. The driving member 212 is used to drive the rotor 120 to rotate. The second test device 220 includes a second housing 221, and the second housing 221 is used to accommodate the cooling oil pipe 140. The cooling oil pipe 140 is used to be arranged on the stator 130. The first delivery pipeline L1 is used to connect the cooling oil circuit (i.e., the rotor oil circuit 120a) of the rotor 120 to transport cooling oil. The first flow meter k1 is configured to measure the flow of cooling oil on the first delivery pipeline L1. The second delivery pipeline L2 is used to connect the cooling oil pipe 140 to transport cooling oil. The second flow meter k2 is configured to be able to measure the flow rate of the cooling oil on the second delivery pipe L2.

[0071] It should be noted that, in this embodiment, the rotor 120 and the stator 130 are tested separately, but share a set of flow recording system, so as to simulate the flow of cooling oil required by the rotor 120 and the stator 130 in the actual motor under the same state. In addition, the driving member 212 can be configured as a drag motor, and the rotor 120 is driven to rotate by the driving member 212 to simulate the rotation of the rotor 120 in the actual motor. Further, in this embodiment, the cooling oil flow test device 200 also includes an oil pump 230 and an oil tank 240, and the cooling oil in the oil tank 240 is extracted by the oil pump 230 and the cooling oil is delivered to the first delivery pipeline L1 and the second delivery pipeline L2 respectively.

[0072] In this embodiment, when the rotor 120 is at different speeds, the flow rate of cooling oil required by the rotor 120 can be recorded by the first flowmeter k1, and the flow rate of cooling oil required by the stator 130 can be recorded by the second flowmeter k2. In this way, the flow rates of cooling oil required by the rotor 120 and the stator 130 under different working conditions can be measured more accurately, providing a reference for the design of the motor cooling system.

[0073] Continuing to refer to FIG. 6, in some embodiments, the cooling oil flow test device 200 further includes a total delivery pipeline L3 and a total flow meter k3. The total delivery pipeline L3 is connected to the first delivery pipeline L1 and the second delivery pipeline L2 respectively, so as to deliver cooling oil to the first delivery pipeline L1 and the second delivery pipeline L2 respectively. The total flow meter k3 is configured to measure the total flow of cooling oil on the total delivery pipeline L3. Specifically, the total flow meter k3 is connected between the oil tank 240 and the oil pump 230 through a pipeline. In this way, the total flow meter k3 can be used to quantitatively input the total flow of cooling oil on the first delivery pipeline L1 and the cooling oil on the second delivery pipeline L2, so as to simulate the initial flow of cooling oil used by the rotor 120 and the stator 130 in the actual motor when the rotor 120 does not rotate, so as to record the flow of cooling oil used by the rotor 120 through the first flow meter k1, and record the flow of cooling oil used by the cooling oil pipe 140, that is, the stator 130 through the second flow meter k2.

[0074] In some embodiments, the cooling oil flow test device 200 has a first test state and a second test state. In the first test state and the second test state, the total flow recorded by the total flow meter k3 is the same. In the first test state, the driving member 212 is used to drive the rotor 120 to rotate at a first preset speed so that the first flow meter k1 records the first flow and the second flow meter k2 records the second flow. In the second test state, the driving member 212 is used to drive the rotor 120 to rotate at a second preset speed so that the first flow meter k1 records the third flow and the second flow meter k2 records the fourth flow. The second preset speed is greater than the first preset speed. The third flow is greater than the first flow, and the fourth flow is less than the second flow.

[0075] Specifically, the first preset speed can be set to 0, and the second preset speed can be greater than 0. Furthermore, the second preset speed can be a constant value or can be gradually increased. In this way, the motor can be simulated when the rotor 120 is at different speeds, and the flow rate of the cooling oil used by the rotor 120 in different states can be recorded by the first flowmeter k1, and the flow rate of the cooling oil used by the stator 130 in different states can be recorded by the second flowmeter k2, thereby providing a reference for the design of the motor cooling system.

[0076] Continuing to refer to FIG. 3 and FIG. 6, and in combination with FIG. 7 and FIG. 8, in some embodiments, a plurality of groups of first oil holes (i.e., first oil leakage holes 120b) are provided on the cooling oil circuit of the rotor 120. A plurality of first cavities 211a are provided in isolation in the first housing 211. Each first cavity 211a is used to accommodate a group of first oil holes to collect the cooling oil leaked from the group of first oil holes. Among them, the cooling oil flow test device 200 also includes a plurality of first output pipes L4 and a plurality of third flow meters k4. One end of each first output pipe L4 is penetrated through the bottom wall of a first cavity 211a, and the other end is connected to a third flow meter k4.

[0077] It should be noted that the arrows in FIG. 7 represent the flow path of the cooling oil in the rotor. Specifically, a plurality of first oil holes are provided in the cooling oil path of the rotor 120, and the plurality of first oil holes can be divided into a plurality of groups, and the central axis of the first oil holes in each group is located on the same vertical reference plane. Each first cavity 211a can be used to collect a group of first oil holes. A seal is provided between two adjacent first cavities 211a to prevent the first oil holes from leaking the cooling oil into other first cavities 211a. Furthermore, a first oil outlet hole t1 is provided on the bottom wall of each first cavity 211a, and each first oil outlet hole t1 is connected to a first output pipe L4, and a third flowmeter k4 is provided on the first output pipe L4. In this way, the flow rate of the cooling oil ejected from the first oil holes of the corresponding group is recorded by each third flowmeter k4 to provide a reference for the design of the motor cooling system.

[0078] Continuing to refer to FIG. 7 and FIG. 8, in some embodiments, the first housing 211 has two openings arranged along the first direction and a cavity connected to the two openings. The first testing device 210 also includes a first cover 213, a plurality of blocking members 214, and a second cover 215 arranged in sequence along the first direction. The first cover 213 is arranged at an opening of the first housing 211 along the first direction, and the second cover 215 is arranged at another opening of the first housing 211 along the first direction. The plurality of blocking members 214 are arranged in the cavity of the first housing 211. The space between the first cover 213, the plurality of blocking members 214, and the second cover 215 forms a first cavity 211a.

[0079] Further, in some embodiments, the first cover 213 is used to fix one end of the rotor 120, and the second cover 215 is used to fix the other end of the rotor 120. A first oil injection hole w1 is provided on either the first cover 213 or the second cover 215, and the first oil injection hole w1 is used to connect the cooling oil path of the rotor 120.

[0080] Specifically, the first shell 211 has two openings arranged along the first direction, and the first cover 213 and the second cover 215 are both provided with stopper structures a1. The stopper structures a1 and the openings cooperate to fix the first cover 213 and the second cover 215. In this embodiment, the first cover 213 can be used as a rear cover plate, and the second cover 215 can be used as a front cover plate. The blocking member 214 can be constructed as a plate-like structure, and a plurality of thrust structures a2 are provided on the inner wall of the first shell 211 to facilitate the installation and fixation of at least a part of the blocking member 214. That is, the blocking member 214 can be an integral structure with the first shell 211, or a split structure with the first shell 211, which can be specifically set according to actual conditions. In this embodiment, the number of the first cavities 211a is set to four, so as to collect the cooling oil leaked from the four groups of first oil holes in the rotor 120. In other embodiments, the number of the first cavities 211a can be reasonably set according to the specific distribution of the first oil holes of the rotor 120. Furthermore, a bearing hole (not shown in the figure) is provided on the first cover member 213 so that one end of the rotor 120 can be fixed to the bearing hole. In addition, a first oil injection hole w1 is provided on the first cover member 213, and the first oil injection hole w1 is used to connect the cooling oil circuit (located in the bearing) of the rotor 120 so as to simulate the oil throwing of the rotor 120. Furthermore, a bearing hole (not shown in the figure) can be provided on the second cover member 215 so that the other end of the rotor 120 can be exposed and connected to the output shaft of the driving member 212. In this way, the cooling oil leaked from each group of first oil holes in the rotor 120 can be collected by the first testing device 210 to provide a reference for the design of the motor cooling system.

[0081] Continuing to refer to FIG. 4 and FIG. 6, and in combination with FIG. 9 and FIG. 10, in some embodiments, the cooling oil pipe 140 is distributed with a plurality of second oil holes (i.e., second oil leakage holes 140a) along the extension direction of its central axis. The second test device 220 also includes a partition 222, and the partition 222 is arranged in the second shell 221 so that the second shell 221 is divided into a plurality of second cavities 221a. Each second cavity 221a is used to be arranged toward a second oil hole to collect the cooling oil leaked from the second oil hole. Among them, the cooling oil flow test device 200 also includes a plurality of second output pipes L5 and a plurality of fourth flow meters k5. One end of each second output pipe L5 is penetrated through the bottom wall of a second cavity 221a, and the other end is connected to a fourth flow meter k5.

[0082] It should be noted that the arrow in FIG. 10 indicates the path of oil leakage from the second oil hole (i.e., the second oil leakage hole 140a). Specifically, the cooling oil pipe 140 is provided with a plurality of second oil holes, and the plurality of second oil holes can be divided into a plurality of groups, each group can include two second oil holes, the central axes of the two second oil holes are located on the same vertical reference plane, but the oil injection directions of the two second oil holes are different. Further, the partition 222 can be constructed of a plurality of plates to form a plurality of isolation structures. The partition 222 is arranged in the second shell 221 to divide the cavity in the second shell 221 into a plurality of second cavities 221a. Each second cavity 221a is used to collect the cooling oil leaked from a second oil hole. Further, a second oil outlet t2 is provided on the bottom wall of each second cavity 221a, and each second oil outlet t2 is connected to a second output pipeline L5, and a fourth flowmeter k5 is provided on the second output pipeline L5. In this way, the amount of cooling oil sprayed from each second oil hole on the cooling oil pipe 140 can be recorded by the second testing device 220, thereby providing a reference for the design of the motor cooling system.

[0083] Referring to FIG. 11 and FIG. 12 , and in combination with FIG. 9 and FIG. 10 , in some embodiments, the second housing 221 has two side walls arranged opposite to each other along a first direction, and the two side walls are used to pass through and fix the two ends of the cooling oil pipe 140. The partition 222 includes a plurality of first connecting plates 222a arranged at intervals along the first direction and a second connecting plate 222b arranged along the second direction. The plurality of first connecting plates 222a pass through the second connecting plates 222b to form a plurality of second cavities 221a in the second housing 221. The first direction and the second direction are perpendicular to each other, and the second direction is parallel to the extension direction of the side wall. In this way, by setting the partition 222 in the second housing 221 to form a plurality of second cavities 221a, it is convenient to collect the amount of cooling oil leaked from each second oil hole.

[0084] Furthermore, the partition 222 also includes a third connecting plate 222c arranged along a third direction (not shown in the figure). The ends of the multiple first connecting plates 222a and the second connecting plates 222b away from the bottom wall of the second shell 221 along the second direction are all penetrated through the third connecting plate 222c to separate the third connecting plate 222c into multiple areas. A through hole u1 is provided on each area of ​​the third connecting plate 222c, each through hole u1 corresponds to a second oil hole, and is located on the oil leakage path of the corresponding second oil hole. It should be noted that the first direction, the second direction and the third direction are perpendicular to each other. In this way, by providing the third connecting plate 222c and providing multiple through holes u1 on the third connecting plate 222c, each through hole u1 corresponds to a second oil hole, and is located on the oil injection path of the corresponding second oil hole, so as to more accurately collect the cooling oil leaked from each second oil hole.

[0085] Continuing to refer to FIG. 4, FIG. 9 and FIG. 11, and in conjunction with FIG. 13, in some embodiments, one end of the cooling oil pipe 140 is sleeved with a fixing plate 141, and a positioning hole 141a is provided on the fixing plate 141. The second test device 220 also includes a fixing member 223, and a fixing hole 221b is provided on a side wall of the second housing 221 arranged along the first direction, and a fixing stop 223a is provided on the fixing member 223, and the fixing stop 223a can cooperate with the fixing hole 221b to fix the fixing member 223 on the side wall of the second housing 221. Among them, the fixing member 223 is also provided with a fixing port 223b and a connecting hole 223c, and one end of the cooling oil pipe 140 can be inserted into the fixing port 223b, and the positioning hole 141a of the fixing plate 141 is aligned with the connecting hole 223c, and the two holes are screwed and fixed by bolts. In this way, the oil spraying direction of the second oil holes on the cooling oil pipe 140 can be positioned so that the cooling oil sprayed from each second oil hole can more accurately pass through a corresponding through hole u1 on the third connecting plate 222c to be collected by a corresponding second cavity 221a.

[0086] Based on the same inventive concept, the embodiment of the present application also provides a cooling oil flow test method, comprising the following steps:

[0087] 1. Test preparation:

[0088] Before the test, as shown in FIG14 , the total flow meter k3, the oil pump 230, and the total oil inlet hole N on the end cover 150 are connected in sequence through pipelines, the first flow meter k1 is connected to the first oil inlet hole n1 of the rotor 120 through a pipeline, and is connected to the oil tank 240 through a pipeline, and the second flow meter k2 is connected to the second oil inlet hole n2 of the cooling oil pipe 140 through a pipeline, and is connected to the oil tank 240 through a pipeline. The oil pump 230 inputs a preset initial flow Q1, the flow of the total flow meter k3 is recorded as Q1, the flow of the first flow meter k1 is recorded as Q2, and the flow of the second flow meter k2 is recorded as Q3.

[0089] 2. Test and record

[0090] According to the structural principle diagram of the cooling oil flow test device 200 shown in FIG6 , the length and diameter of the first delivery pipe L1 and the second delivery pipe L2 are adjusted, and the preset initial flow is simulated and inputted on the first oil filling hole w1 of the first cover 213, so that when the flow of the total flow meter k3 is recorded as Q1, the flow of the first flow meter k1 is recorded as Q2, and the flow of the second flow meter k2 is recorded as Q3. It should be noted that the initial simulation does not involve the rotation of the rotor 120, and this initial simulation test can be regarded as when the first preset speed V1 of the rotor 120 is 0, the total flow meter k3, the first flow meter k1 and the second flow meter k2 record the various flows.

[0091] Further, the driving member 212 inputs the second preset speed V2, the flow rate of the total flow meter k3 is recorded as Q11, the flow rate of the first flow meter k1 is recorded as Q21, and the flow rate of the second flow meter k2 is recorded as Q31. Each third flow meter k4 counts the amount of cooling oil leaked from a corresponding group of first oil holes, and all cooling oil is finally returned to the oil tank 240. Each fourth flow meter k5 counts the amount of cooling oil leaked from a corresponding second oil hole, and all cooling oil is finally returned to the oil tank 240.

[0092] In this way, the cooling oil flow testing device and method provided in the embodiment of the present application can realize detailed measurement of the cooling flow of the oil holes at various positions on the motor, complete the flow simulation closed loop, accumulate test data to improve the simulation method, and provide a reliable reference for the design of the motor oil cooling system 100.

[0093] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cooling oil flow test device, characterized in that: include: A first testing device, comprising a first housing and a driving member, wherein the first housing is used to accommodate a rotor; The driving member is used to drive the rotor to rotate; A second testing device comprises a second housing, wherein the second housing is used to accommodate a cooling oil pipe; the cooling oil pipe is used to be arranged on the stator; a first delivery pipeline and a first flow meter, wherein the first delivery pipeline is used to communicate with the cooling oil circuit of the rotor to deliver cooling oil; and the first flow meter is configured to measure the flow rate of the cooling oil on the first delivery pipeline; and A second delivery pipeline and a second flow meter, wherein the second delivery pipeline is used to communicate with the cooling oil pipe to deliver the cooling oil; and the second flow meter is configured to measure the flow rate of the cooling oil on the second delivery pipeline.

2. The cooling oil flow rate testing device according to claim 1, characterized in that: The cooling oil flow rate testing device also includes a total delivery pipeline and a total flow meter; The main delivery pipeline is connected to the first delivery pipeline and the second delivery pipeline respectively, so as to deliver cooling oil to the first delivery pipeline and the second delivery pipeline respectively; the total flow meter is configured to measure the total flow of the cooling oil on the main delivery pipeline.

3. The cooling oil flow rate testing device according to claim 2, characterized in that: The cooling oil flow test device has a first test state and a second test state; in the first test state and the second test state, the total flow recorded by the total flow meter is the same; In the first test state, the driving member is used to drive the rotor to rotate at a first preset speed, so that the first flow meter records a first flow rate and the second flow meter records a second flow rate; In the second test state, the driving member is used to drive the rotor to rotate at a second preset speed, so that the first flow meter records a third flow rate and the second flow meter records a fourth flow rate; The second preset speed is greater than the first preset speed; The third flow rate is greater than the first flow rate, and the fourth flow rate is less than the second flow rate.

4. The cooling oil flow rate testing device according to claim 3, characterized in that: The first preset rotational speed is configured as zero; the second preset rotational speed is configured as a constant value, or is configured as a rotational speed with an increasing trend.

5. The cooling oil flow rate testing device according to claim 1, characterized in that: The cooling oil path of the rotor is provided with a plurality of first oil holes; the first housing is provided with a plurality of first cavities arranged in isolation; each first cavity is used to accommodate a group of the first oil holes to collect the cooling oil leaked from the group of the first oil holes; Wherein, the cooling oil flow testing device also includes a plurality of first output pipes and a plurality of third flow meters; one end of each of the first output pipes is passed through the bottom wall of one of the first cavities, and the other end is connected to one of the third flow meters.

6. The cooling oil flow rate testing device according to claim 5, characterized in that: The first shell has two openings arranged along a first direction and a cavity communicating with the two openings; The first testing device further comprises a first covering member, a plurality of blocking members and a second covering member which are sequentially arranged at intervals along the first direction, the first covering member being arranged at one of the openings of the first shell along the first direction, and the second covering member being arranged at another of the openings of the first shell along the first direction; the plurality of blocking members being arranged in the cavity of the first shell; Wherein, the first cavity is formed by the spaces between the first covering member, the plurality of blocking members and the second covering member in sequence.

7. The cooling oil flow rate testing device according to claim 6, characterized in that: The first cover member is used to fix one end of the rotor, and the second cover member is used to fix the other end of the rotor; A first oil filling hole is provided on any one of the first cover member and the second cover member, and the first oil filling hole is used to connect to the cooling oil passage of the rotor.

8. The cooling oil flow rate testing device according to claim 1, characterized in that: The cooling oil pipe is provided with a plurality of second oil holes distributed along the extension direction of the central axis thereof; the second testing device further comprises a partition, the partition being arranged in the second shell so as to divide the second shell into a plurality of second cavities; Each of the second cavities is arranged toward the one second oil hole to collect cooling oil leaked from the second oil hole; Wherein, the cooling oil flow testing device also includes a plurality of second output pipes and a plurality of fourth flow meters; one end of each of the second output pipes is passed through the bottom wall of a second cavity, and the other end is connected to a fourth flow meter.

9. The cooling oil flow rate testing device according to claim 8, characterized in that: The second housing has two side walls arranged opposite to each other along a first direction, and the two side walls are used for passing and fixing the two ends of the cooling oil pipe; The partition comprises a plurality of first connecting plates arranged at intervals along a first direction and a second connecting plate arranged along a second direction; the plurality of first connecting plates penetrate the second connecting plates to form the plurality of second cavities in the second shell; The first direction and the second direction are perpendicular to each other, and the second direction is parallel to an extending direction of the side wall.

10. The cooling oil flow rate testing device according to claim 9, characterized in that: The partition also includes a third connecting plate arranged along a third direction; The ends of the plurality of first connecting plates and the second connecting plate away from the bottom wall of the second shell along the second direction are all penetrated through the third connecting plate to divide the third connecting plate into a plurality of areas; A through hole is provided on each of the regions of the third connecting plate, and each of the through holes corresponds to one of the second oil holes and is located on the oil leakage path of the corresponding second oil hole.

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