Lubricating flow field measuring method of electromechanical coupling system and related equipment

Abstract

The embodiment of the invention provides a lubricating flow field measuring method of an electromechanical coupling system and related equipment, a motor is arranged in the electromechanical coupling system, and the method comprises the steps that a plurality of temperature fields around the motor are measured according to a plurality of preset temperature measuring positions around the motor, so that temperature field distribution around the motor is obtained; dividing a plurality of flow field measurement areas according to the temperature field distribution, and measuring flow fields of the flow field measurement areas; and coupling the temperature fields and the flow fields of the plurality of flow field measurement areas to obtain lubrication flow field distribution around the motor. According to the technical scheme provided by the embodiment of the invention, the lubrication flow field distribution is generated through real-time measurement of the temperature field and the flow field, so that real-time measurement of the electromechanical coupling system on the internal lubrication state of the motor under various working conditions is realized.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle powertrain maintenance. Specifically, it relates to a method for measuring the lubrication flow field of an electromechanical coupling system and related equipment. Background Art

[0002] The electromechanical coupling system is mostly used for power conversion in hybrid vehicles, and the electromechanical coupling system mostly operates under dynamic composite conditions during work. Its composition involves high-speed high-power permanent magnet synchronous motors and mechanical transmission components. Therefore, the dynamic characteristics of the electromechanical coupling system are not only related to the operating state of the mechanical structure but also related to the dynamic performance of the permanent magnet synchronous motor.

[0003] In the prior art, the performance of the motor is reflected by some characteristics of the permanent magnet synchronous motor. Among them, the lubrication state inside the motor is a way to reflect the performance of the permanent magnet synchronous motor. However, the permanent magnet synchronous motor itself is also a complex electromechanical system. When exploring the complex lubrication distribution inside it, it is often measured under steady-state conditions, and it is impossible to truly reflect the lubrication flow field distribution inside the permanent magnet synchronous motor under composite conditions. Summary of the Invention

[0004] To solve the above technical problems, embodiments of the present application provide a method for measuring the lubrication flow field of an electromechanical coupling system and related equipment.

[0005] According to one aspect of the embodiments of the present application, a method for measuring the lubrication flow field of an electromechanical coupling system is provided. An electric motor is provided in the electromechanical coupling system, and the method includes:

[0006] Measuring a plurality of temperature fields around the motor according to a plurality of preset temperature measurement positions around the motor to obtain the temperature field distribution around the motor;

[0007] Dividing a plurality of flow field measurement regions according to the temperature field distribution and measuring the flow fields of the flow field measurement regions;

[0008] Coupling the temperature fields and the flow fields of the plurality of flow field measurement regions to obtain the lubrication flow field distribution around the motor.

[0009] In an embodiment of the present application, the temperature measurement positions include wired sampling points located on the motor and wireless sampling points located outside the motor; the measuring a plurality of temperature fields around the motor according to a plurality of preset temperature measurement positions around the motor includes:

[0010] Measuring a plurality of first temperature sub-fields according to the wired sampling points and measuring a plurality of second temperature sub-fields according to the wireless sampling points;

[0011] Couple multiple of the first temperature sub-fields with multiple of the second temperature sub-fields to obtain multiple of the temperature fields.

[0012] In an embodiment of the present application, the dividing multiple flow field measurement regions according to the temperature field distribution includes:

[0013] Determine the boundaries of the temperature field distribution according to a preset temperature threshold;

[0014] Determine the flow field measurement regions based on the boundaries of the temperature field distribution, wherein the temperature values within the flow field measurement regions are higher than the temperature threshold.

[0015] In an embodiment of the present application, the measuring the flow field of the flow field measurement regions includes:

[0016] Divide the flow field measurement regions into multiple sub-regions according to a preset regional interval;

[0017] Determine multiple measurement cross-sections within the sub-regions according to a preset cross-sectional interval, and determine multiple measurement points around the edges of the measurement cross-sections according to a preset measurement point interval;

[0018] Measure the measurement point flow velocities of multiple of the measurement points to obtain the flow field of the flow field measurement regions.

[0019] In an embodiment of the present application, the measuring the measurement point flow velocities of multiple of the measurement points includes:

[0020] Based on the rotation direction of the motor, measure the circumferential velocity, axial velocity, and radial velocity of the measurement points respectively;

[0021] Map the circumferential velocity, the axial velocity, and the radial velocity to a preset three-dimensional coordinate system, and determine the measurement point flow velocity based on the mapped three-dimensional coordinate system.

[0022] In an embodiment of the present application, the electromechanical coupling system is further provided with a cavity tooling, and the motor is used to drive the cavity tooling; before measuring the circumferential velocity of the measurement points, the method further includes:

[0023] Measure the common velocity of the motor and the cavity tooling at the measurement points, and measure the convected velocity of the cavity tooling at the measurement points, wherein both the common velocity and the convected velocity are used to describe the linear velocity of the measurement points;

[0024] Calculate the absolute value of the difference between the common velocity and the convected velocity to obtain the circumferential velocity.

[0025] In one embodiment of the present application, the axial direction of the motor is determined as the vertical axis direction in the three-dimensional coordinate system; determining the flow velocity at the measurement point based on the mapped three-dimensional coordinate system includes:

[0026] Determine the connection line between the measurement point and the origin, and determine the included angle between the connection line and the horizontal axis of the three-dimensional coordinate system;

[0027] Based on the circumferential velocity, the axial velocity, the radial velocity, and the included angle, determine the flow velocity at the measurement point on the mapped three-dimensional coordinate system.

[0028] According to one aspect of the embodiments of the present application, there is provided a lubricating flow field measurement device for an electromechanical coupling system, including:

[0029] A temperature field distribution determination unit, configured to measure a plurality of temperature fields around the motor according to a plurality of preset temperature measurement positions around the motor, so as to obtain the temperature field distribution around the motor;

[0030] A flow field determination unit, configured to divide a plurality of flow field measurement regions according to the temperature field distribution and measure the flow fields of the flow field measurement regions;

[0031] A lubricating flow field distribution determination unit, configured to couple the temperature fields of the plurality of flow field measurement regions with the flow fields, so as to obtain the lubricating flow field distribution around the motor.

[0032] According to one aspect of the embodiments of the present application, there is provided a computer-readable storage medium, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor of a computer, the computer is caused to execute the lubricating flow field measurement method of the electromechanical coupling system as described in the above embodiments.

[0033] According to one aspect of the embodiments of the present application, there is provided an electronic device, including: one or more processors; a storage device, configured to store one or more programs. When the one or more programs are executed by the one or more processors, the electronic device is caused to implement the lubricating flow field measurement method of the electromechanical coupling system as described in the above embodiments.

[0034] In the technical solution of the embodiments of the present application, a plurality of temperature fields around the motor are measured in real time through a plurality of temperature measurement positions, the plurality of temperature fields are combined to generate a temperature field distribution, a plurality of flow field measurement regions are determined based on the temperature field distribution, the flow fields of the corresponding regions are measured in the flow field measurement regions, and then the temperature fields and the flow fields are coupled to obtain the lubricating flow field distribution around the motor. By measuring the temperature field and the flow field in real time, the lubricating flow field distribution of a plurality of flow field measurement regions is generated, so as to realize the real-time measurement of the internal lubrication state of the motor in the electromechanical coupling system under various working conditions.

[0035] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0037] Figure 1 is a schematic diagram of a partial structure of a three-dimensional region formed based on a lubricating cavity in an electromechanical coupling system shown in an exemplary embodiment of this application.

[0038] Figure 2 is a flowchart of a method for measuring a lubricating flow field of an electromechanical coupling system shown in an exemplary embodiment of this application.

[0039] Figure 3 is Figure 2 a flowchart of step S100 in an exemplary embodiment in the shown embodiment.

[0040] Figure 4 is Figure 2 a flowchart of step S110 in an exemplary embodiment in the shown embodiment.

[0041] Figure 5 is Figure 2 a flowchart of step S110 in another exemplary embodiment in the shown embodiment.

[0042] Figure 6 is a distribution diagram of multiple measurement sections and multiple measurement points.

[0043] Figure 7 is Figure 5 a flowchart of step S420 in an exemplary embodiment in the shown embodiment.

[0044] Figure 8 is Figure 7 a flowchart of step S510 in an exemplary embodiment in the shown embodiment.

[0045] Figure 9 is Figure 7 a flowchart of step S500 in an exemplary embodiment in the shown embodiment.

[0046] Figure 10 is a block diagram of a device for measuring a lubricating flow field of an electromechanical coupling system shown in an exemplary embodiment of this application.

[0047] Figure 11 It is a schematic structural diagram of an electronic device shown in an exemplary embodiment of the present application. Detailed implementation manners

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0049] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be used. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present application.

[0050] The block diagrams shown in the drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0051] The flowcharts shown in the drawings are only illustrative and do not necessarily include all the content and operations / steps, nor are they necessarily executed in the described order. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to the actual situation.

[0052] It should be noted that: "a plurality of" mentioned herein refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0053] In an embodiment of the present application, the electromechanical coupling system for lubricating flow field distribution measurement includes a motor and a cavity tooling. A cavity for storing lubricating oil is provided inside the motor, and a shaft encoder is provided on the rotating shaft of the motor, and the shaft encoder is connected to a signal acquisition module arranged outside the motor. Among them, the motor is used to drive the cavity tooling, and a housing is sleeved outside the electromechanical coupling system.

[0054] In addition, wire sampling points are set at designated positions of the motor, and a thermocouple wire sampling module is set at the wire sampling points to measure the temperature of the motor. Moreover, wireless sampling points are set on the outer side of the motor, and an infrared remote sensing wireless thermometer is set at the wireless sampling points to measure the temperature of the motor. Of course, for the modules and instruments used for temperature sampling at the wire sampling points and wireless sampling points, only exemplary descriptions are given here without specific limitations.

[0055] Among them, for the position setting of the wire sampling points, they can be arranged along the axial direction of the motor, with a wire sampling point set every α°, and α can be adaptively adjusted according to the actual usage scenario. The temperature sampling module set based on the wire sampling points samples the temperature of the lubricating oil liquid that can be contacted inside the motor. For the position setting of the wireless sampling points, they can be on the side of the housing far from the motor. During the process of sampling the temperature of the motor based on the wireless sampling points, the temperature of the lubricating oil liquid at non-contact positions inside the motor is measured by infrared scanning respectively from the axial direction and the radial direction of the motor.

[0056] Based on the cavity inside the motor for storing the lubricating oil liquid, after the motor rotates, the boundary of the cavity forms a three-dimensional area for lubrication. Taking the local characteristics of the three-dimensional area shown as an example, it is described exemplarily as follows: around one week of the extending direction of the three-dimensional area, the four surfaces of the three-dimensional area are successively represented as the inlet surface 001, the inner ring surface 002, the outlet surface 003, and the outer ring surface 004. In addition, two cross-sections for intercepting the local characteristics of the three-dimensional area are respectively represented as the pressure surface 005 and the suction surface 006. Figure 1 As shown in the local characteristics of the three-dimensional area, it is described exemplarily as follows: around one week of the extending direction of the three-dimensional area, the four surfaces of the three-dimensional area are successively represented as the inlet surface 001, the inner ring surface 002, the outlet surface 003, and the outer ring surface 004. In addition, two cross-sections for intercepting the local characteristics of the three-dimensional area are respectively represented as the pressure surface 005 and the suction surface 006.

[0057] It should be noted that there are no specific limitations on the specific shape of the three-dimensional area formed by the lubrication area inside the motor. The shape of the above three-dimensional area is only an example for the convenience of describing other embodiments of the present application.

[0058] The technical solution of the embodiment of the present application proposes a method for measuring the lubrication flow field of an electromechanical coupling system, as specifically shown in Figure 2 This method at least includes step S100 to step S120, which are introduced in detail as follows:

[0059] In step S100, multiple temperature fields around the motor are measured according to multiple preset temperature measurement positions around the motor to obtain the temperature field distribution around the motor.

[0060] Among them, the temperature measurement positions include wire sampling points and wireless sampling points. In step S100, as specifically shown in Figure 3 Measuring multiple temperature fields around the motor according to multiple preset temperature measurement positions around the motor at least includes step S200 to step S210, which are introduced in detail as follows:

[0061] In step S200 , a plurality of first temperature subfields are measured according to wired sampling points, and a plurality of second temperature subfields are measured according to wireless sampling points.

[0062] Specifically, the temperature around the sampling point is measured in real time through the wired sampling point, and the area with relatively high temperature is measured as the center of a first temperature subfield to obtain multiple areas indicated by the first temperature subfields, and the temperature of each first temperature subfield is from high to low from the center area to the boundary area. At the same time, according to the temperature measured in real time by the wireless sampling point, the second temperature subfield obtained is similar to the first temperature subfield. The infrared remote sensing wireless thermometer is placed close to the shell to scan the temperature around the motor in real time, and the scanned area with relatively high temperature is taken as the center of a second temperature subfield to obtain multiple areas indicated by the second temperature subfields, and the temperature of each second temperature subfield is from high to low from the center area to the boundary area.

[0063] In step S210, a plurality of first temperature sub-fields are coupled with a plurality of second temperature sub-fields to obtain a plurality of temperature fields.

[0064] It should be noted that the wired sampling point collects temperature by direct contact, and the temperature accuracy is relatively high, but the disadvantage is that the wired sampling point cannot collect the temperature around the motor in full coverage. The temperature sampling of the wireless sampling point is just the opposite. The wireless sampling point collects temperature by indirect contact, and the temperature accuracy is relatively low, but the wireless sampling point can collect the temperature around the motor in full coverage.

[0065] Combining the temperature characteristics collected by the above-mentioned wired sampling points and wireless sampling points, this scheme couples the first temperature subfield with the second temperature subfield based on the first temperature subfield measured by the wired sampling points and the second temperature subfield measured by the wireless sampling points to obtain a temperature field, thereby making up for some defects of using only one of the sampling methods and improving the reliability of temperature field measurement.

[0066] Through the above implementation, based on the coupling results of multiple first temperature subfields and second temperature subfields, the temperature field distribution is obtained. The inspector can determine that the area with higher temperature is the area with weaker lubrication through the temperature field distribution results and the internal lubrication principle of the motor. This makes it easier for the inspector to find out the reason for insufficient lubrication at the corresponding position of the motor.

[0067] In step S110, a plurality of flow field measurement areas are divided according to the temperature field distribution, and the flow fields in the flow field measurement areas are measured.

[0068] On the one hand, in step S110, specifically refer to Figure 4 As shown, dividing a plurality of flow field measurement areas according to the temperature field distribution at least includes steps S300 to S310, which are described in detail as follows:

[0069] In step S300, the boundary of the temperature field distribution is determined according to a preset temperature threshold.

[0070] Specifically, based on the temperature field distribution measured in the above embodiment, each temperature field in the temperature field distribution can be obtained respectively. Among them, since in each temperature field, the area with relatively low temperature indicates that the lubrication effect in the corresponding area is relatively good. Therefore, when determining the flow field measurement area, the flow field in this area does not need to be measured. A temperature threshold is determined, and the temperature threshold is used to describe the boundary value for qualified lubrication effect. Exemplarily described, based on each temperature field and the test experience of the tester, the corresponding boundary is drawn in the temperature field according to the determined temperature threshold.

[0071] Further, in step S310, the flow field measurement area is determined based on the boundary of the temperature field distribution, where the temperature value in the flow field measurement area is higher than the temperature threshold.

[0072] Specifically, based on the boundary determined by the temperature threshold, the temperature field is divided into two areas. For example, according to the high and low temperature values, the area with a temperature value higher than the temperature threshold is divided into a high-temperature area, and the area with a temperature value lower than the temperature threshold is divided into a low-temperature area. Among them, the high-temperature area is the flow field measurement area in this solution.

[0073] Through the above implementation method, the key measurement area is screened out, and the area with relatively good lubrication effect is screened out. On the one hand, the measurement accuracy of the lubrication flow field distribution is improved. On the other hand, the measurement burden of the instrument is reduced, and the measurement efficiency is improved, thereby reducing the error caused by the time difference in the measurement process when measuring the lubrication flow field distribution in real time.

[0074] On the other hand, in step S110, specifically referring to Figure 5 As shown, when measuring the flow field in the flow field measurement area, at least steps S400 to S420 are further included, which are introduced in detail as follows:

[0075] In step S400, the flow field measurement area is divided into multiple sub-areas according to a preset area interval.

[0076] Specifically, based on the three-dimensional area of motor lubrication, the overlapping part of the three-dimensional area and the flow field measurement area is determined, and the corresponding flow field area is divided into multiple sub-areas according to a preset area interval.

[0077] According to the determined sub-areas, in step S410, as Figure 6 shown, multiple measurement cross-sections 007 are determined in the sub-areas according to a preset cross-section interval, and multiple measurement points 008 are determined according to a preset measurement point interval around the edge of the measurement cross-section 007.

[0078] Specifically, for each rotation of the motor, N pulse signals are obtained based on the shaft encoder connected to the motor shaft by the signal acquisition module. The N pulse signals can be evenly distributed around the motor shaft, or they can be unevenly distributed. In this application, the even distribution is used for illustrative purposes. According to the signal nodes of the pulse signals, the signal nodes in multiple sub-regions are determined. For example, if the number of sub-regions obtained according to the preset region interval is M, then there are N / M = L pulse signal nodes in each sub-region, and the number of signal nodes in the corresponding sub-region is L.

[0079] Taking the interval feature between adjacent signal nodes as the specific cross-section interval, the cross-section interval is expressed as the recording positions of L encoders. Exemplarily, the measurement cross-section 007 is described. One signal node corresponds to one measurement cross-section 007, and the rotation direction of the motor is perpendicular to the measurement cross-section 007.

[0080] In addition, a plurality of measurement points 008 are determined according to the preset measurement point interval around the edge of the measurement cross-section 007. In this application, taking the measurement cross-section 007 as a rectangular cross-section as an example, specifically refer to Figure 6 As shown, for illustrative purposes, 15 measurement point positions are set on one side of the rectangular cross-section, that is, the line segment between the inner ring surface 002 and the outer ring surface 004 is divided into 14 parts. Of course, it can also be other numbers of parts.

[0081] Furthermore, after determining the specific measurement point positions, in step S420, the measurement point velocities of a plurality of measurement points 008 are measured to obtain the flow field of the flow field measurement region.

[0082] Specifically, in the corresponding sub-region, through the determined measurement point positions, the measurement point velocities corresponding to a plurality of measurement points 008 are measured. The measurement point velocities corresponding to all measurement points 008 are combined, and then the measurement results of all sub-regions are combined to form the flow field of the corresponding flow field measurement region.

[0083] Through the above implementation manner, the flow field measurement region is divided into multiple sub-regions, and a plurality of measurement points 008 are set in the multiple sub-regions, so as to realize representing the flow field of the entire flow field measurement region through the combination of local feature changes.

[0084] In the implementation manner of this application, in order to more clearly disclose the specific solution of this application, for measuring the measurement point velocities of a plurality of measurement points 008, in step S420, specifically refer to Figure 7 As shown, it at least includes step S500 to step S510, which are introduced in detail as follows:

[0085] In step S500, based on the rotation direction of the motor, the circumferential velocity, axial velocity, and radial velocity of the measurement point 008 are measured respectively.

[0086] Among them, the circumferential velocity, axial velocity, and radial velocity are all used to represent the component velocities of the lubricating oil in different directions at the corresponding measurement point positions when measuring the flow velocity. The circumferential velocity is expressed as the velocity in the tangential direction of the motor rotation, the axial velocity is expressed as the velocity in the axial direction of the motor shaft, and the radial velocity is expressed as the velocity in the radial direction of the motor shaft.

[0087] In order to more clearly describe each component velocity and improve the readability of the test results, in step S510, the circumferential velocity, axial velocity, and radial velocity are mapped to a preset three-dimensional coordinate system, and the flow velocity at the measurement point is determined based on the mapped three-dimensional coordinate system.

[0088] Through the above implementation manner, splitting the flow velocity at the measurement point into component velocities in multiple directions can reduce the measurement difficulty and improve the reliability and accuracy of the measurement results. At the same time, after mapping the measurement results of each component velocity to the three-dimensional coordinate system, the detection personnel can directly obtain the distribution state of the lubricating flow field inside the motor by obtaining the graph drawn by the three-dimensional coordinate system and the specific values of the characteristics of each part of the graph in the three-dimensional coordinate system, thereby reducing the recognition difficulty of the measurement results.

[0089] Further, in step S510, the axial direction of the motor is determined as the vertical axis direction in the three-dimensional coordinate system, and the origin position in the three-dimensional coordinate system is determined according to the rotation center of the motor. The flow velocity at the measurement point is determined based on the mapped three-dimensional coordinate system, specifically referring to Figure 8 shown, at least including step S600 to step S610, which are introduced in detail as follows:

[0090] In step S600, the connection line between the measurement point 008 and the origin is determined, and the included angle between the connection line and the horizontal axis of the three-dimensional coordinate system is determined.

[0091] Illustratively, the specific position of the measurement point 008 in the three-dimensional coordinate system is represented as P, and the included angle between the line segment from point P to the origin and the horizontal axis is represented as θ.

[0092] In step S610, according to the circumferential velocity, axial velocity, radial velocity, and the included angle, the flow velocity at the measurement point on the mapped three-dimensional coordinate system is determined.

[0093] Specifically, the circumferential velocity is expressed as V t , the axial velocity is expressed as V a , the radial velocity is expressed as V r , and the three component velocities are mapped to the three-dimensional coordinate system based on the included angle θ, and are specifically expressed by the following expression:

[0094] u = V t sinθ + V r cosθ

[0095] v = Vt cosθ - V r sinθ

[0096] w = V a

[0097] In the formula, u represents the component velocity in the horizontal axis direction in the three - dimensional coordinate system, v represents the component velocity in the vertical axis direction in the three - dimensional coordinate system, and w represents the component velocity in the vertical axis direction in the three - dimensional coordinate system.

[0098] Through the above - mentioned embodiments, the measured circumferential velocity, axial velocity, and radial velocity are mapped into a specific three - dimensional coordinate system, improving the distinguishability of the flow velocity at the measuring point.

[0099] Based on the above - mentioned embodiments, for the measurement of the circumferential velocity, in step S500, specifically referring to Figure 9 as shown, it further includes at least steps S700 to S710, which are introduced in detail as follows:

[0100] In step S700, measure the common velocity of the motor and the cavity tooling at the measuring point 008, and measure the convected velocity of the cavity tooling at the measuring point 008. Among them, both the common velocity and the convected velocity are used to describe the linear velocity of the measuring point 008.

[0101] In step S710, calculate the absolute value of the difference between the common velocity and the convected velocity to obtain the circumferential velocity.

[0102] Specifically, in the actual measurement process of the flow velocity at the measuring point, in addition to the condition of the motor idling by itself, most of the time the motor needs to operate under load. That is, when collecting the flow velocity at the measuring point, the rotational speed of the cavity tooling itself will be superimposed on the lubricating flow field velocity and obtained simultaneously. Therefore, when calculating the velocity vector at the measuring point position in the relative coordinate system, it is necessary to first subtract the convected velocity of the measured position rotating in the cavity from the directly measured common velocity to obtain the circumferential velocity of the lubricating flow field at the corresponding measuring point 008, which is specifically expressed by the following formula:

[0103] V t = V tL - ωR

[0104] ω = 2πn / 60

[0105] In the formula, V t represents the circumferential velocity, V tL represents the directly measured common velocity, ω represents the rotational angular velocity of the cavity tooling, R represents the distance between point P and the origin, and n represents the number of rotation cycles of the cavity tooling per minute.

[0106] Through the above embodiments, the entrainment velocity generated by the cavity tooling is screened out, reducing the interference of other characteristics inside the motor except the lubricating oil on the measurement results, and improving the measurement accuracy of the circumferential velocity of the corresponding measuring point 008 in the lubrication flow field.

[0107] In step S120, the temperature field of multiple flow field measurement regions is coupled with the flow field to obtain the lubrication flow field distribution around the motor.

[0108] Through the above embodiments, based on the premise that the higher the known temperature, the worse the lubrication effect, the lubrication flow field distribution obtained by coupling the temperature field with the flow field can not only reflect the real-time lubrication state of the lubricating oil inside the motor, but also reflect the real-time temperature state. At the same time, according to the display results of the three-dimensional model, it is possible to quickly compare and analyze the lubrication conditions in different regions, track the flow direction of the lubricating oil, and facilitate finding the weak points of the lubrication effect and analyzing the influence of different control conditions on the lubrication effect of specific lubrication distribution regions.

[0109] The following introduces the device embodiments of the present application, which can be used to execute the lubrication flow field measurement method of the electromechanical coupling system in the above embodiments of the present application. For the details not disclosed in the device embodiments of the present application, please refer to the embodiments of the lubrication flow field measurement method of the electromechanical coupling system above.

[0110] Figure 10 The block diagram of a lubrication flow field measurement device 800 of an electromechanical coupling system according to an embodiment of the present application is shown.

[0111] Refer to Figure 10 As shown, a lubrication flow field measurement device 800 of an electromechanical coupling system according to an embodiment of the present application includes:

[0112] A temperature field distribution determination unit 810, configured to measure multiple temperature fields around the motor according to multiple preset temperature measurement positions around the motor, so as to obtain the temperature field distribution around the motor;

[0113] A flow field determination unit 820, configured to divide multiple flow field measurement regions according to the temperature field distribution and measure the flow field of the flow field measurement regions;

[0114] A lubrication flow field distribution determination unit 830, configured to couple the temperature fields of multiple flow field measurement regions with the flow field to obtain the lubrication flow field distribution around the motor.

[0115] In some embodiments of the present application, based on the foregoing solution, the temperature field distribution determination unit 810 is further configured as: the temperature measurement positions include wired sampling points on the motor and wireless sampling points outside the motor; measuring multiple temperature fields around the motor according to multiple preset temperature measurement positions around the motor includes:

[0116] Measure multiple first temperature sub - fields according to wired sampling points, and measure multiple second temperature sub - fields according to wireless sampling points;

[0117] Couple the multiple first temperature sub - fields with the multiple second temperature sub - fields to obtain multiple temperature fields.

[0118] In some embodiments of the present application, based on the foregoing solution, the flow field determination unit 820 is further configured to: divide multiple flow field measurement regions according to the temperature field distribution, including:

[0119] Determine the boundary of the temperature field distribution according to a preset temperature threshold;

[0120] Determine the flow field measurement regions based on the boundary of the temperature field distribution, where the temperature values within the flow field measurement regions are higher than the temperature threshold.

[0121] In some embodiments of the present application, based on the foregoing solution, the flow field determination unit 820 is further configured to: measure the flow field of the flow field measurement regions, including:

[0122] Divide the flow field measurement regions into multiple sub - regions according to a preset region interval;

[0123] Determine multiple measurement cross - sections 007 within the sub - regions according to a preset cross - section interval, and determine multiple measurement points 008 around the edge of the measurement cross - section 007 according to a preset measurement point interval;

[0124] Measure the flow velocities of the multiple measurement points 008 to obtain the flow field of the flow field measurement regions.

[0125] In some embodiments of the present application, based on the foregoing solution, the flow field determination unit 820 is further configured to: measure the flow velocities of the multiple measurement points 008, including:

[0126] Based on the rotation direction of the motor, measure the circumferential velocity, axial velocity, and radial velocity of the measurement point 008 respectively;

[0127] Map the circumferential velocity, axial velocity, and radial velocity to a preset three - dimensional coordinate system, and determine the flow velocity of the measurement point based on the mapped three - dimensional coordinate system.

[0128] In some embodiments of the present application, based on the foregoing solution, the flow field determination unit 820 is further configured to: the electromechanical coupling system is also provided with a cavity tooling, and the motor is used to drive the cavity tooling; before measuring the circumferential velocity of the measurement point 008, the method further includes:

[0129] Measure the common velocity of the motor and the cavity tooling at the measurement point 008, and measure the circumferential velocity of the cavity tooling at the measurement point 008, where both the common velocity and the circumferential velocity are used to describe the linear velocity of the measurement point 008;

[0130] Calculate the absolute value of the difference between the common speed and the entrained speed to obtain the circumferential speed.

[0131] In some embodiments of the present application, based on the foregoing solution, the flow field determination unit 820 is further configured to: determine the vertical axis direction in the three-dimensional coordinate system of the axial direction of the motor; determine the flow velocity of the measurement point based on the mapped three-dimensional coordinate system, including:

[0132] Determine the connection line between the measurement point 008 and the origin, and determine the included angle between the connection line and the horizontal axis of the three-dimensional coordinate system;

[0133] Determine the flow velocity of the measurement point on the mapped three-dimensional coordinate system according to the circumferential velocity, the axial velocity, the radial velocity, and the included angle.

[0134] It should be noted that the lubricating flow field measurement device 800 of the electromechanical coupling system provided in the above embodiments and the lubricating flow field measurement method of the electromechanical coupling system provided in the above embodiments belong to the same concept. The specific manners in which each module and unit perform operations have been described in detail in the method embodiments, and will not be elaborated here.

[0135] An embodiment of the present application further provides an electronic device, including a processor and a memory. Among them, computer-readable instructions are stored on the memory, and when the computer-readable instructions are executed by the processor, the lubricating flow field measurement method of the electromechanical coupling system as described above is implemented.

[0136] Figure 11 The structural schematic diagram of the computer system of the electronic device suitable for implementing the embodiments of the present application is shown.

[0137] It should be noted that Figure 11 The computer system 900 of the electronic device shown is only an example, and should not bring any limitation to the functions and usage scopes of the embodiments of the present application.

[0138] As Figure 11 shown, the computer system 900 includes a central processing unit (CPU) 901, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 902 or the program loaded from the storage section 908 into the random access memory (RAM) 903, such as executing the method described in the above embodiments. In the RAM 903, various programs and data required for system operation are also stored. The CPU 901, the ROM 902, and the RAM 903 are connected to each other through a bus 904. The input / output (I / O) interface 905 is also connected to the bus 904.

[0139] The following components are connected to the I / O interface 905: an input part 906 including a keyboard, a mouse, etc.; an output part 907 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage part 908 including a hard disk, etc.; and a communication part 909 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part 909 performs communication processing via a network such as the Internet. A drive 910 is also connected to the I / O interface 905 as needed. A removable medium 911, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 910 as needed so that a computer program read from it can be installed into the storage part 908 as needed.

[0140] Specifically, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 909, and / or installed from the removable medium 911. When the computer program is executed by the central processing unit (CPU) 901, various functions defined in the system of the present application are executed.

[0141] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of a computer-readable storage medium can include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The computer program contained on a computer-readable medium can be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0142] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Among them, each block in a flowchart or block diagram can represent a module, a program segment, or a part of code, and the above module, program segment, or part of code contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0143] The units involved in the embodiments described in this application can be implemented in software or in hardware, and the described units can also be provided in a processor. Among them, the names of these units do not constitute a limitation on the units themselves in some cases.

[0144] As another aspect, the present application also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or may exist separately without being assembled into the electronic device. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements the methods described in the above embodiments.

[0145] It should be noted that although several modules or units of a device for action execution are mentioned in the above detailed description, such a division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of the two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0146] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software or by a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (such as a personal computer, a server, a touch terminal, or a network device, etc.) to execute the methods according to the embodiments of the present application.

[0147] After considering the specification and practicing the embodiments disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application.

[0148] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A method for measuring the lubrication flow field of an electromechanical coupling system, wherein a motor is provided in the electromechanical coupling system, characterized in that, The method includes: Measuring a plurality of temperature fields around the motor according to a plurality of preset temperature measurement positions around the motor to obtain the temperature field distribution around the motor; Dividing a plurality of flow field measurement regions according to the temperature field distribution and measuring the flow fields of the flow field measurement regions; Coupling the temperature fields of the plurality of flow field measurement regions with the flow fields to obtain the lubricating flow field distribution around the motor.

2. The method according to claim 1, wherein The temperature measurement positions include wired sampling points on the motor and wireless sampling points outside the motor; the measuring a plurality of temperature fields around the motor according to a plurality of preset temperature measurement positions around the motor includes: Measuring a plurality of first temperature sub-fields according to the wired sampling points and measuring a plurality of second temperature sub-fields according to the wireless sampling points; Coupling the plurality of first temperature sub-fields with the plurality of second temperature sub-fields to obtain the plurality of temperature fields.

3. The method according to claim 1, wherein The dividing a plurality of flow field measurement regions according to the temperature field distribution includes: Determining the boundaries of the temperature field distribution according to a preset temperature threshold; Determining the flow field measurement regions based on the boundaries of the temperature field distribution, wherein the temperature values within the flow field measurement regions are higher than the temperature threshold.

4. The method according to claim 3, wherein The measuring the flow fields of the flow field measurement regions includes: Dividing the flow field measurement regions into a plurality of sub-regions according to a preset region interval; Determining a plurality of measurement cross-sections within the sub-regions according to a preset cross-section interval and determining a plurality of measurement points around the edges of the measurement cross-sections according to a preset measurement point interval; Measuring the measurement point flow velocities of the plurality of measurement points to obtain the flow fields of the flow field measurement regions.

5. The method according to claim 4, characterized in that, The measuring the measurement point flow velocities of the plurality of measurement points includes: Respectively measuring the circumferential velocity, axial velocity and radial velocity of the measurement points based on the rotation direction of the motor; Mapping the circumferential velocity, the axial velocity and the radial velocity to a preset three-dimensional coordinate system and determining the measurement point flow velocity based on the mapped three-dimensional coordinate system.

6. The method according to claim 5, wherein The electromechanical coupling system is further provided with a cavity tooling, and the motor is used to drive the cavity tooling; before measuring the circumferential velocity of the measurement points, the method further includes: Measuring the common velocity of the motor and the cavity tooling at the measurement points and measuring the entrainment velocity of the cavity tooling at the measurement points, wherein both the common velocity and the entrainment velocity are used to describe the linear velocity of the measurement points; Calculating the absolute value of the difference between the common velocity and the entrainment velocity to obtain the circumferential velocity.

7. The method according to claim 5, wherein Determining the axial direction of the motor as the vertical axis direction in the three-dimensional coordinate system; the determining the measurement point flow velocity based on the mapped three-dimensional coordinate system includes: Determining the connection line between the measurement point and the origin and determining the included angle between the connection line and the horizontal axis of the three-dimensional coordinate system; Determining the measurement point flow velocity on the mapped three-dimensional coordinate system according to the circumferential velocity, the axial velocity, the radial velocity and the included angle.

8. A lubricating flow field measuring device for an electromechanical coupling system, characterized in that, Includes: A temperature field distribution determination unit, configured to measure a plurality of temperature fields around the motor according to a plurality of preset temperature measurement positions around the motor to obtain the temperature field distribution around the motor; A flow field determination unit, configured to divide a plurality of flow field measurement regions according to the temperature field distribution and measure the flow field of the flow field measurement regions; A lubricating flow field distribution determination unit, configured to couple the temperature fields of the plurality of flow field measurement regions with the flow fields to obtain the lubricating flow field distribution around the motor.

9. A computer-readable storage medium, characterized in that, A computer-readable instruction is stored thereon, and when the computer-readable instruction is executed by a processor of a computer, the computer is caused to execute the lubricating flow field measurement method of the electromechanical coupling system according to any one of claims 1-7.

10. An electronic device, characterized in that, Comprising: One or more processors; A storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device is caused to implement the lubricating flow field measurement method of the electromechanical coupling system according to any one of claims 1 to 7.

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