Method and device for determining power lost by gear meshing

Abstract

The application provides a method and device for determining gear meshing loss power, the method comprising: controlling a reducer to perform power transmission according to a preset condition, determining input power and output power corresponding to the reducer, and the preset condition enabling total loss power corresponding to the reducer to be determined only by meshing loss power; and determining meshing loss power corresponding to the reducer according to the input power and the output power. The application can accurately determine gear meshing loss power of the reducer by performing power consumption testing on the reducer according to the preset condition, so as to accurately reduce gear meshing loss in the future, thereby improving system efficiency of the reducer.

Description

Technical Field

[0001] This application relates to the field of reducer power optimization technology, and in particular to a method and apparatus for determining gear meshing loss power. Background Technology

[0002] Currently, automobiles are rapidly developing towards new energy, with pure electric vehicles becoming a major trend. As a key component, the reducer is playing an increasingly important role, making the improvement of the efficiency of the reducer assembly crucial.

[0003] When a reducer is in operation, power loss involves many factors, including gear meshing loss, oil churning loss, bearing loss, and oil seal loss. For high-efficiency, low-loss gear designs, effective gear meshing loss testing methods are necessary and urgent. However, traditional reducer efficiency testing methods can only test the overall efficiency. Gear meshing loss is usually small and difficult to measure accurately. Failure to accurately obtain gear meshing loss will affect the final reducer system efficiency. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide at least one method and apparatus for determining gear meshing loss power. By performing power consumption tests on the reducer under preset conditions, the gear meshing loss power of the reducer can be accurately determined, so as to accurately reduce gear meshing loss in the future and thereby improve the efficiency of the reducer system.

[0005] This application mainly includes the following aspects:

[0006] In a first aspect, embodiments of this application provide a method for determining gear meshing loss power. The method includes: controlling a reducer to perform power transmission according to preset conditions, determining the input power and output power corresponding to the reducer, wherein the preset conditions enable the total loss power corresponding to the reducer to be determined only by meshing loss power, and determining the meshing loss power corresponding to the reducer based on the input power and output power.

[0007] In one possible implementation, the reducer uses a permanent magnet levitation air bearing to eliminate power loss due to bearing oil churning, bearing friction, and bearing contaminant particle friction.

[0008] In one possible implementation, the preset conditions include: during the transmission operation of the reducer, lubrication is performed on the gears and differential inside the reducer by oil spraying to eliminate power loss due to oil churning in the gears inside the reducer.

[0009] In one possible implementation, the preset conditions also include: removing the oil seals on the input shaft and output shaft of the reducer to eliminate power loss due to oil seals inside the reducer.

[0010] In one possible implementation, determining the meshing loss power corresponding to the reducer based on the input power and output power includes: directly determining the difference between the input power and output power as the meshing loss power.

[0011] In one possible implementation, the reducer includes a motor, an input shaft, two first air bearings, a first-stage drive gear, a first-stage drive-driven gear, an intermediate shaft, two second air bearings, a second-stage drive gear, a second-stage drive-driven gear, an output shaft, a differential, and two third air bearings. All air bearings are permanent magnet levitation air bearings. The two first air bearings support the input shaft, the two second air bearings support the intermediate shaft, and the two third air bearings support the output shaft. The motor provides torque input and transmits torque to the input shaft. The input shaft transmits torque to the intermediate shaft via the meshing of the first-stage drive gear and the first-stage driven gear. The intermediate shaft then transmits torque to the output shaft via the second-stage drive gear and the second-stage driven gear.

[0012] Secondly, embodiments of this application also provide a device for determining gear meshing loss power. The device includes: a first determining module, used to control a reducer to perform power transmission according to preset conditions, and determine the input power and output power corresponding to the reducer, wherein the preset conditions ensure that the total loss power corresponding to the reducer is determined only by the meshing loss power; and a second determining module, used to determine the meshing loss power corresponding to the reducer based on the input power and output power.

[0013] In one possible implementation, the second determining module is further configured to: directly determine the difference between the input power and the output power as the meshing loss power.

[0014] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate via the bus. The machine-readable instructions are executed by the processor to perform the steps of the method for determining the gear meshing loss power in the first aspect or any possible implementation of the first aspect.

[0015] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the step of determining the gear meshing loss power in the first aspect or any possible implementation of the first aspect.

[0016] This application provides a method and apparatus for determining gear meshing loss power. The method includes: controlling a reducer to transmit power according to preset conditions; determining the input power and output power of the reducer; the preset conditions ensure that the total loss power of the reducer is determined only by the meshing loss power; and determining the meshing loss power of the reducer based on the input power and output power. This application uses preset conditions to perform power consumption testing on the reducer, which can accurately determine the gear meshing loss power of the reducer, facilitating subsequent accurate reduction of gear meshing losses and thus improving the efficiency of the reducer system.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart illustrating a method for determining gear meshing loss power provided in an embodiment of this application is shown;

[0020] Figure 2 A schematic diagram of the structure of a speed reducer provided in an embodiment of this application is shown;

[0021] Figure 3 This paper shows a schematic diagram of the total power loss structure of a reducer according to an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of a device for determining gear meshing loss power provided in an embodiment of this application is shown;

[0023] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0025] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] When a reducer is in operation, power loss includes power loss due to gear meshing, power loss due to oil churning, power loss due to bearings, and power loss due to oil seals. Traditional reducer efficiency testing methods can only test the overall efficiency and cannot accurately obtain the power loss of a single component. Among these, power loss due to oil churning includes power loss due to bearing oil churning and power loss due to gear oil churning.

[0027] Furthermore, meshing losses are usually small and difficult to measure accurately, making it difficult to identify the value and proportion of meshing losses in the total efficiency loss. Therefore, for high-efficiency, low-loss gear designs, effective gear meshing loss testing methods are necessary and urgent, which is of great significance for improving the efficiency of current reducers.

[0028] Based on this, the present application provides a method and apparatus for determining gear meshing loss power. By performing power consumption tests on the reducer under preset conditions, the gear meshing loss power of the reducer can be accurately determined, so as to accurately reduce gear meshing loss in the subsequent process and improve the efficiency of the reducer system. The details are as follows:

[0029] Please see Figure 1 , Figure 1 A flowchart illustrating a method for determining gear meshing loss power provided in an embodiment of this application is shown. Figure 1 As shown, the method provided in this application embodiment includes the following steps:

[0030] S100. Control the reducer to transmit power according to preset conditions, and determine the corresponding input power and output power of the reducer.

[0031] The preset conditions ensure that the total power loss of the reducer is determined only by the meshing power loss.

[0032] S200. Determine the meshing loss power of the reducer based on the input power and output power.

[0033] This application proposes a test measurement method for gear meshing loss power. This method can effectively solve the problem that the gear meshing loss power inside the reducer cannot be tested individually due to the mixing of multiple loss power. Through steps S100 to S200, the accurate gear meshing loss power can be obtained, which facilitates subsequent analysis of gear meshing loss, optimizes gear design scheme, reduces gear meshing loss power, and improves the working efficiency of the entire reducer system.

[0034] For specific implementation details, please refer to [link / reference]. Figure 2 , Figure 2 A schematic diagram of a speed reducer provided in an embodiment of this application is shown. Figure 2 As shown. The reducer includes a motor 1, an input shaft 2, two first air bearings 31 and 32, a first-stage drive gear 41, a first-stage driven gear 42, an intermediate shaft 5, two second air bearings 61 and 62, a second-stage drive gear 71, a second-stage driven gear 72, an output shaft 8, and two third air bearings 91 and 92.

[0035] Among them, all air bearings are permanent magnet levitation air bearings. The two first air bearings 31 and 32 support the input shaft 2, the two second air bearings 61 and 62 support the intermediate shaft 5, and the two third air bearings 91 and 92 support the output shaft 8.

[0036] In a preferred embodiment, the motor 1 provides torque input and transmits the output torque to the input shaft 2. The input shaft 2 rotates under the power provided by the motor 1, driving the first-stage drive gear 41 to rotate. Through the meshing between the first-stage drive gear 41 and the first-stage driven gear 42, the torque is transmitted to the intermediate shaft 5. The intermediate shaft 5 rotates under the action of torque, and then drives the second-stage drive gear 71 to rotate. Through the meshing between the second-stage drive gear 71 and the second-stage driven gear 72, the torque is transmitted again to the output shaft 8.

[0037] Specifically, the transmission efficiency of the reducer is determined by the following formula:

[0038]

[0039] In formula (1), η represents the transmission efficiency of the reducer, Pout P represents the output power corresponding to the output shaft of the reducer. in In this application, P represents the input power corresponding to the input shaft of the reducer. out and P in It can be obtained in advance when testing.

[0040] However, the total power loss P of the reducer A =P in -P out .

[0041] In this application, please refer to Figure 3 , Figure 3 A schematic diagram of the total power loss structure of a reducer provided in an embodiment of this application is shown. Figure 3 As shown, for the total power loss of the reducer:

[0042] P A =P CN +P Zf +P Zw +P ZJ +P Y +P CJ (2)

[0043] In formula (2), P CN P represents the power loss during gear meshing. Zf P represents the power loss due to friction within the bearing itself. Zw P represents the power loss due to friction between contaminant particles in the bearing. ZJ P represents the power loss due to oil churning in the bearing. Y P represents the power loss of the oil seal. CJ This indicates the power loss caused by gear churning.

[0044] In a preferred embodiment, during the gear meshing loss power determination test, all air bearings in the reducer are replaced with permanent magnet levitation air bearings. The permanent magnet levitation air bearings are supported by a combination of magnetic repulsion and air film force. Compared to traditional contact bearings, this effectively reduces the impact of bearing losses on system efficiency, thereby eliminating bearing-related power losses in the reducer (including bearing oil churning loss power P). ZJ Power loss due to bearing friction P Zf and the power loss P due to friction of bearing contaminant particles Zw Even using permanent magnet levitation air bearings, P can be made ZJ =0, P Zf =0, P Zw =0.

[0045] In this embodiment of the application, the preset conditions include:

[0046] During the transmission operation of the reducer, the gears and differential inside the reducer are lubricated by oil spraying to eliminate oil churning losses in the gears inside the reducer.

[0047] In one example, the lubrication of the primary gears (including the primary driving gear and the primary driven gear), the secondary gears (the secondary driving gear and the secondary driven gear), and the output shaft corresponding to the differential is achieved by spraying oil instead of immersion oil lubrication. This eliminates the power loss P caused by gear churning. CJ Even if P CJ =0.

[0048] In a preferred embodiment, the preset conditions further include:

[0049] Remove the oil seals from the input and output shafts of the reducer to eliminate the risk of oil seal loss within the reducer.

[0050] In this application, eliminating the oil seals on the input and output shafts of the reducer can eliminate the power loss P caused by the oil seals. Y That is, let P Y =0.

[0051] In a specific embodiment of this application, step S200 includes:

[0052] The difference between the input power and the output power is directly determined as the meshing loss power.

[0053] Specifically, as can be seen from formula (2), in the above P ZJ =0, P Zf =0, P Zw =0, P CJ =0 and P Y Given that = 0, we can obtain:

[0054] P CN =P A =P in -P out

[0055] The advantages of this application are:

[0056] ① With the aim of retaining only the gear meshing loss power of the reducer, the effects of bearing self-friction loss power, bearing contaminant particle friction power, bearing oil churning loss power, gear oil churning loss power, and oil seal loss power on the reducer efficiency are eliminated, thereby accurately measuring the gear meshing loss power of the reducer.

[0057] ② A non-contact permanent magnet levitation air bearing is adopted, which is jointly supported by magnetic repulsion and air film force, thereby improving the measurement accuracy of gear meshing loss power of the reducer to a greater extent while meeting the load requirements.

[0058] The measurement of single loss power can be achieved by controlling the lubrication method, the air bearing used, and the sealing method of the reducer. For example, as mentioned above, the gear meshing loss power can be obtained when using permanent / magnetic levitation air bearings, removing the input / output shaft oil seals, and using an oil spraying method.

[0059] Based on the same application concept, this application also provides a gear meshing loss power determination device corresponding to the gear meshing loss power determination method provided in the above embodiments. Since the principle of the device in this application is similar to the gear meshing loss power determination method in the above embodiments of this application, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0060] Please see Figure 4 , Figure 4 A schematic diagram of a device for determining gear meshing loss power according to an embodiment of this application is shown. Figure 4 As shown, the device includes:

[0061] The first determining module 300 is used to control the reducer to perform power transmission according to preset conditions, determine the input power and output power of the reducer, and the preset conditions make the total loss power of the reducer determined only by the meshing loss power.

[0062] The second determining module 310 is used to determine the meshing loss power corresponding to the reducer based on the input power and output power.

[0063] Based on the same application concept, please refer to Figure 5 , Figure 5 This illustration shows a schematic diagram of an electronic device according to an embodiment of this application. The electronic device 400 includes a processor 410, a memory 420, and a bus 430. The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 and the memory 420 communicate via the bus 430. The machine-readable instructions are executed by the processor 410 to perform the steps of the method for determining the power loss of gear meshing as described in any of the above embodiments.

[0064] Based on the same concept, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when run by a processor, executes the steps of the method for determining gear meshing loss power provided in the above embodiments.

[0065] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division; in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0066] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0067] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0068] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0069] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining gear meshing loss power, characterized in that, The method includes: The reducer is controlled to transmit power according to preset conditions, and the input power and output power of the reducer are determined. The preset conditions ensure that the total power loss of the reducer is determined only by the meshing power loss. The meshing loss power corresponding to the reducer is determined based on the input power and the output power. The reducer uses a permanent magnet levitation air bearing to eliminate power loss due to bearing oil churning, bearing friction loss, and bearing contaminant particle friction loss. The preset conditions include: During the transmission operation of the reducer, the gears and differential inside the reducer are lubricated by oil spraying in order to eliminate the power loss caused by oil churning in the gears inside the reducer. Remove the oil seals on the input and output shafts of the reducer to eliminate power loss due to oil seals within the reducer.

2. The method according to claim 1, characterized in that, Based on the input power and output power, the meshing loss power corresponding to the reducer is determined, including: The difference between the input power and the output power is directly determined as the meshing loss power.

3. The method according to claim 1, wherein the reducer comprises a motor, an input shaft, two first air bearings, a first-stage driving gear, a first-stage driven gear, an intermediate shaft, two second air bearings, a second-stage driving gear, a second-stage driven gear, an output shaft, and two third air bearings, wherein the two first air bearings support the input shaft, the two second air bearings support the intermediate shaft, and the two third air bearings support the output shaft. in, The motor provides torque input and transmits the torque to the input shaft. The input shaft transmits the torque to the intermediate shaft through the meshing of a first-stage driving gear and a first-stage driven gear. The intermediate shaft then transmits the torque to the output shaft through a second-stage driving gear and a second-stage driven gear.

4. A device for determining gear meshing loss power, characterized in that, The device includes: The first determining module is used to control the reducer to perform power transmission according to preset conditions, and to determine the input power and output power of the reducer. The preset conditions ensure that the total loss power of the reducer is determined only by the meshing loss power. The second determining module is used to determine the meshing loss power corresponding to the reducer based on the input power and the output power; The reducer uses a permanent magnet levitation air bearing to eliminate power loss due to bearing oil churning, bearing friction loss, and bearing contaminant particle friction loss. The preset conditions include: During the transmission operation of the reducer, the gears and differential inside the reducer are lubricated by oil spraying in order to eliminate the power loss caused by oil churning in the gears inside the reducer. Remove the oil seals on the input and output shafts of the reducer to eliminate power loss due to oil seals within the reducer.

5. The apparatus according to claim 4, characterized in that, The second determining module is further configured to: The difference between the input power and the output power is directly determined as the meshing loss power.

6. An electronic device, characterized in that, include: The device includes a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory via the bus. The machine-readable instructions are executed by the processor to perform the steps of the method for determining gear meshing loss power as described in any one of claims 1 to 3.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method for determining gear meshing loss power as described in any one of claims 1 to 3.

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