CN116611259A - Method and device for determining efficiency of speed reducer and nonvolatile storage medium - Google Patents
Method and device for determining efficiency of speed reducer and nonvolatile storage medium Download PDFInfo
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Abstract
The application discloses a method and a device for determining efficiency of a speed reducer and a nonvolatile storage medium. Wherein the method comprises the following steps: acquiring operation information of the speed reducer under a circulation working condition, wherein the operation information comprises: input torque, run length, and input speed; determining total power loss generated by the operation of the speed reducer under a circulation working condition according to the input torque and the input rotating speed; and determining the operation efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss. The application solves the technical problem that the loss proportion of each part in the speed reducer cannot be determined, so that the part with low operation efficiency of the speed reducer cannot be accurately positioned.
Description
Technical Field
The application relates to the technical field of data processing, in particular to a method and a device for determining the efficiency of a speed reducer and a nonvolatile storage medium.
Background
The fuel consumption or the electricity consumption of the new energy automobile under the cycle working conditions of China light vehicle test cycle (China Light Vehicle Test Cycle, CLTC), global unified vehicle test cycle (Word Light Vehicle Test Cycle, WLTC) and the like is an important index for evaluating the whole automobile economy of the new energy automobile, and the speed reducer is used as a core assembly for transmitting torque, so that the efficiency of the speed reducer has a direct influence on the whole automobile economy. In the related art, the efficiency of the speed reducer under the circulation working condition is determined through the bench test result, the bench test result can only evaluate the overall efficiency of the speed reducer assembly, the low-efficiency part can not be accurately positioned, and the design optimization work of the new energy speed reducer can not be supported.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining the efficiency of a speed reducer and a nonvolatile storage medium, which at least solve the technical problem that the speed reducer is not operated inefficiently because the loss proportion of each part in the speed reducer cannot be determined by the related technology.
According to an aspect of an embodiment of the present application, there is provided a method of determining efficiency of a decelerator, including: acquiring operation information of the speed reducer under a circulation working condition, wherein the operation information comprises: input torque, run length, and input speed; determining total power loss generated by the operation of the speed reducer under a circulation working condition according to the input torque and the input rotating speed; and determining the operation efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss.
Optionally, determining the total power loss generated by the speed reducer operating under the circulation working condition according to the operation information includes: dividing an input torque into a first torque and a second torque; determining a first power and a first type of loss parameters of the speed reducer according to the first torque and the input rotating speed, wherein the first type of loss parameters are operation parameters related to the first torque inside the speed reducer; determining a second type of loss parameter and a third type of loss parameter of the speed reducer according to the second torque and the input rotating speed, wherein the second type of loss parameter is an operation parameter related to the second torque in the speed reducer, and the third type of loss parameter is an operation parameter related to the input rotating speed in the speed reducer; and determining the sum of the first type of loss parameters, the second type of loss parameters and the third type of loss parameters as the total power loss generated by the operation of the speed reducer under the circulation working condition.
Optionally, dividing the input torque into the first torque and the second torque includes: determining a curve graph of the operation of the speed reducer according to the operation time length and the input torque, wherein the horizontal axis of the curve graph is the operation time length, and the vertical axis of the curve graph is the input torque; the input torque corresponding to the curve with the vertical axis greater than zero is determined as the first torque, and the input torque corresponding to the curve with the vertical axis less than zero is determined as the second torque.
Optionally, determining the efficiency of the speed reducer operating under the circulation working condition according to the input torque, the total power loss and the operation duration comprises: determining a second power of the speed reducer according to the second torque, the input rotating speed, the second type of loss parameters and the third type of loss parameters; determining a sum of the first power and the second power, and determining a difference between the sum of the first power and the second power and the total power loss; determining a first integral of the sum of the first power and the second power over the operating period and a second integral of the difference over the operating period, respectively; the ratio of the first integrated value and the second integrated value is determined as the efficiency of the operation of the retarder in the circulation mode.
Optionally, determining the first power of the speed reducer according to the first torque and the input rotation speed includes: determining a first product of the first torque and the input rotational speed; and obtaining a unit conversion coefficient of the speed reducer, and determining the ratio of the first product to the unit conversion coefficient as the first power.
Optionally, determining the second power of the retarder based on the second torque, the input speed, the second type of loss parameter, and the third type of loss parameter includes: determining a second product of the second torque and the input rotational speed; and determining the sum of the ratio of the second product to the unit conversion coefficient, the second type of loss parameters and the third type of loss parameters as second power.
Optionally, determining the proportion of the power loss of each part in the speed reducer to the total power loss includes: determining a third integrated value of a sum of a first gear mesh loss parameter of the first type of loss parameters and a second gear mesh loss parameter of the second type of loss parameters over an operating duration; determining a ratio of the third integrated value to a fourth integrated value of the total power loss over the operating period as a first ratio of the retarder gear mesh loss to the total power loss; determining a fifth integrated value of the sum of the first bearing friction loss parameter of the first type of loss parameters and the second bearing friction loss parameter of the second type of loss parameters over the operating time period; determining a ratio of the fifth integrated value to the fourth integrated value as a second proportion of the friction loss of the reducer bearing to the total power loss; determining a sixth integral value of the oil seal friction loss parameter in the third type of loss parameters in the operation time period; determining the ratio of the sixth integral value to the fourth integral value as a third proportion of the oil seal friction loss of the speed reducer to the total power loss; determining a seventh integral value of the system churning loss parameter in the third class of loss parameters in the operation time period; the ratio of the seventh integrated value to the fourth integrated value is determined as a fourth proportion of the churning loss of the retarder to the total power loss.
According to another aspect of the embodiment of the present application, there is also provided an apparatus for determining efficiency of a decelerator, including: the acquisition module is used for acquiring the operation information of the speed reducer under the circulation working condition, wherein the operation information comprises: input torque, run length, and input speed; the first determining module is used for determining total power loss generated by the operation of the speed reducer under the circulation working condition according to the input torque and the input rotating speed; and the second determining module is used for determining the operating efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss.
According to another aspect of the embodiment of the present application, there is also provided a nonvolatile storage medium in which a computer program is stored, wherein the above method for determining the efficiency of a decelerator is performed by running the computer program on a device in which the nonvolatile storage medium is located.
According to another aspect of an embodiment of the present application, there is also provided an electronic device including a memory having a computer program stored therein, and a processor configured to perform the above-described method of determining retarder efficiency by the computer program.
In the embodiment of the application, the operation information of the speed reducer under the circulation working condition is acquired, wherein the operation information comprises: input torque, run length, and input speed; determining total power loss generated by the operation of the speed reducer under a circulation working condition according to the input torque and the input rotating speed; the method comprises the steps of determining the operation efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and determining the proportion of the power loss of each part in the speed reducer to the total power loss.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a block diagram of the hardware architecture of a computer terminal (or mobile device) for implementing a method of determining retarder efficiency, according to an embodiment of the application;
FIG. 2 is a flow chart of a method of determining retarder efficiency according to an embodiment of the application;
FIG. 3 is a graph of input torque versus operating time for a retarder according to an embodiment of the application;
FIG. 4 is a block diagram of an apparatus for determining the efficiency of a decelerator in accordance with an embodiment of the present application;
fig. 5 is a flowchart of the operation of the apparatus for determining the efficiency of a decelerator according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to better understand the embodiments of the present application, technical terms related to the embodiments of the present application are explained as follows:
gear mesh loss: in the embodiment of the application, the power loss caused by friction and resistance generated by gears in the speed reducer during operation is referred to.
Bearing friction loss: in the embodiment of the application, the power loss caused by friction of the bearing in the speed reducer under the non-lubrication condition is referred to.
Oil seal friction loss: in the embodiment of the application, the power loss caused by friction of the bearing in the speed reducer under the condition of lubricant is referred to.
System churning loss: in the embodiment of the application, the power loss caused by stirring of the lubricant is generated due to the motion friction of gears, chains and other parts in the running process of the speed reducer.
In the related art, the speed reducer is regarded as a whole only by a bench test method, so that the total power loss of the whole under the circulation working condition is obtained, and the power loss of each part in the speed reducer cannot be determined, so that the problem that the part with higher power loss in the speed reducer cannot be positioned exists. In order to solve this problem, related solutions are provided in the embodiments of the present application, and are described in detail below.
In accordance with an embodiment of the present application, there is provided a method embodiment for determining the efficiency of a retarder, it being noted that the steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and that, although a logical sequence is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in a different order than that illustrated herein.
The method embodiments provided by the embodiments of the present application may be performed in a mobile terminal, a computer terminal, or similar computing device. Fig. 1 shows a block diagram of a hardware architecture of a computer terminal (or mobile device) for implementing a method of determining retarder efficiency. As shown in fig. 1, the computer terminal 10 (or mobile device 10) may include one or more processors 102 (shown as 102a, 102b, … …,102 n) which may include, but are not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA, a memory 104 for storing data, and a transmission module 106 for communication functions. In addition, the method may further include: a display, an input/output interface (I/O interface), a Universal Serial BUS (USB) port (which may be included as one of the ports of the BUS), a network interface, a power supply, and/or a camera. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the electronic device described above. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
It should be noted that the one or more processors 102 and/or other data processing circuits described above may be referred to generally herein as "data processing circuits. The data processing circuit may be embodied in whole or in part in software, hardware, firmware, or any other combination. Furthermore, the data processing circuitry may be a single stand-alone processing module, or incorporated, in whole or in part, into any of the other elements in the computer terminal 10 (or mobile device). As referred to in embodiments of the application, the data processing circuit acts as a processor control (e.g., selection of the path of the variable resistor termination connected to the interface).
The memory 104 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the method for determining efficiency of a speed reducer in the embodiment of the present application, and the processor 102 executes the software programs and modules stored in the memory 104, thereby executing various functional applications and data processing, that is, implementing the above-mentioned vulnerability detection method of application program. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission means 106 is arranged to receive or transmit data via a network. The specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal 10. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module for communicating with the internet wirelessly.
The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with a user interface of the computer terminal 10 (or mobile device).
In the above operating environment, an embodiment of the present application provides a method for determining efficiency of a speed reducer, and fig. 2 is a flowchart of a method for determining efficiency of a speed reducer, as shown in fig. 2, and the method includes the following steps:
step S202, operation information of the speed reducer under a circulation working condition is obtained, wherein the operation information comprises: input torque, run length, and input speed.
According to the method provided by the embodiment of the application, the total power loss of the speed reducer and the power loss of each part in the speed reducer are determined according to the operation parameters of the speed reducer under the circulation working condition, so that in step S202, the operation parameters of the speed reducer such as the input torque, the operation duration, the input rotating speed and the like when the speed reducer operates under the circulation working condition are firstly obtained.
Step S204, determining the total power loss generated by the operation of the speed reducer under the circulation working condition according to the input torque and the input rotating speed.
In step S204, determining total power loss generated after the speed reducer operates for a period of time under the circulation condition according to the input torque and the input rotation speed of the speed reducer under the circulation condition obtained in step S202, wherein the duration of the period of time during which the speed reducer operates under the circulation condition is the same as the operation duration in step S202; the total power loss is obtained by regarding the decelerator as a whole.
According to an alternative embodiment of the application, determining the total power loss generated by the operation of the speed reducer under the circulation condition according to the operation information comprises: dividing an input torque into a first torque and a second torque; determining a first power and a first type of loss parameters of the speed reducer according to the first torque and the input rotating speed, wherein the first type of loss parameters are operation parameters related to the first torque inside the speed reducer; determining a second type of loss parameter and a third type of loss parameter of the speed reducer according to the second torque and the input rotating speed, wherein the second type of loss parameter is an operation parameter related to the second torque in the speed reducer, and the third type of loss parameter is an operation parameter related to the input rotating speed in the speed reducer; and determining the sum of the first type of loss parameters, the second type of loss parameters and the third type of loss parameters as the total power loss generated by the operation of the speed reducer under the circulation working condition.
In the present embodiment, the total power loss generated when the speed reducer is operated in the circulation mode with the operation information in step S202 is determined by, first, classifying the input torque in the operation information as the positive torque T + (i.e., first torque) and negative torque T - (i.e., the second torque), wherein the positive torque T + Refers to the torque transmitted by the speed reducer when the input shaft and the output shaft of the speed reducer rotate in the same direction, and the negative torque T - Refers to the torque transmitted when the input shaft and the output shaft of the reduction gear rotate in opposite directions. Next, positive torque T is used + And the input rotational speed n in the operation information determines the positive torque input power P of the retarder when the retarder is operated with the operation information in step S202 + (i.e., a first power) and a first type of loss parameter inside the retarder, wherein the first type of loss parameter comprises: positive torque gear mesh loss P inside a speed reducer g+ And positive torque bearing friction loss P inside the reducer b+ The method comprises the steps of carrying out a first treatment on the surface of the By means of negative torque T - And determining a second type of loss parameters and a third type of loss parameters inside the speed reducer when the speed reducer operates with the operation information in step S202, wherein the second type of loss parameters include: negative torque gear mesh loss P inside speed reducer g- And negative torque bearing friction loss P inside the reducer b- The method comprises the steps of carrying out a first treatment on the surface of the The third class of loss parameters includes: oil seal friction loss P inside speed reducer s And system churning loss P c . Finally, according to formula P a ＝P g+ +P b+ +P g- +P b- +P s +P c Determining the total power loss P generated by the speed reducer when the speed reducer operates in the circulation working condition according to the operation information in the step S202 a 。
The positive torque gear engagement loss P g+ And negative torque gear engagement loss P g- Are all obtained by solving the following formula,
wherein L is a To mesh with the gear mesh line length, F n To engage the normal load of the gear-like wheel, V s To engage the sliding speed of the gear-like wheel, V r To engage the rolling speed of the gear-like wheel, F r For rolling friction load of engaged gear s For the friction coefficient of the meshing gear, l is the coordinate of the meshing node of the meshing gear along the meshing line, b 0 For the tooth width of the meshing gear, beta is the helix angle of the meshing gear, eh is the oil film thickness, F nu For normal load on each section of engagement line, ρ is the lubricant density, V is the kinematic viscosity of the lubricant, V g And V r The sliding speed and the rolling speed of the meshing gears are respectively; wherein the load is a vector, and when the direction of the load is positive, the positive torque gear engagement loss P is obtained according to the formula g+ Otherwise, when the direction of the load is negative, the negative torque gear engagement loss P g- 。
Positive torque bearing friction loss P inside the above-mentioned speed reducer b+ And negative torque bearing friction loss P inside the reducer b- All through the formulaSolving to obtain, wherein Z 1 Is constant, Z 1 The value range is 0.0004-0.0006; p is p 1 F is equivalent dynamic load of the bearing a1 、F r1 The axial load and the radial load of the bearing are respectively,c a for a basic nominal dynamic load, y is constant at 0.55, d in this embodiment m1 For the diameter of the shaft for mounting the bearing, ω is the rotational angular velocity of the bearing; wherein the load is a vector, and when the direction of the load is positive, the friction loss P of the positive torque bearing is obtained according to the formula b+ Otherwise, when the direction of the load is negative, the friction loss P of the negative torque bearing is obtained according to the formula b- 。
Oil seal friction loss P inside speed reducer s By the formulaObtained by, wherein d 0 Is the diameter of the shaft, n is the rotating speed, F 0 For friction force per unit length of circumference of shaft, F 0 The value range of (2) is 0.3-0.5, pi is the circumference ratio. System churning loss P inside the reducer c The result is obtained by the following formula,
wherein C is m To the oil-stirring resistance moment omega of the oil-stirring teeth 1 For stirring the rotation speed of oil teeth, ρ is the density of lubricating oil, R p1 To stir the pitch radius of the oil teeth, S m The surface area of the stirring oil tooth immersed in the lubricating oil is v, and the motion viscosity of the lubricating oil; h is the oil immersion depth of the gear; v (V) p The total volume of the gear oil immersion; v (V) 0 Is the total volume of the lubricating oil; d (D) p Is the pitch diameter.
It should be noted that the above-mentioned "positive" and "negative" are only used to indicate the rotational directions of the input shaft and the output shaft of the speed reducer; the parameters of the speed reducer running when the rotation directions of the input shaft and the output shaft are the same are marked as positive, and the parameters of the speed reducer running when the rotation directions of the input shaft and the output shaft are opposite are marked as negative. For example, the positive torque gear engagement loss P g+ For indicating the gear engagement loss of the speed reducer generated when the rotation directions of the input shaft and the output shaft are the same, the negative torque gear engagement loss P g- For indicating a gear engagement loss of the reduction gear that occurs when the rotational directions of the input shaft and the output shaft are opposite; positive torque bearing friction loss P b+ For indicating bearing friction loss, negative torque bearing friction loss P, generated when the rotation directions of the input shaft and the output shaft of the speed reducer are the same b- For indicating bearing friction losses of the reducer that occur when the rotational directions of the input shaft and the output shaft are opposite.
According to some alternative embodiments of the application, determining a first power of the retarder based on the first torque and the input speed includes: determining a first product of the first torque and the input rotational speed; and obtaining a unit conversion coefficient of the speed reducer, and determining the ratio of the first product to the unit conversion coefficient as the first power.
In some alternative embodiments, the positive torque input power P+ (i.e., the first power) of the retarder when the retarder is operating with the operating information in step S202 is formulatedObtained by, wherein T + X n is the first product; 9549 is a unit conversion coefficient of the speed reducer, 9549 is a unit conversion coefficient, and the unit conversion coefficient is fixed to 9549 in the technical field of speed reducers.
The first torque and the second torque in the above embodiment are obtained by dividing the input torque into the first torque and the second torque, including: determining a curve graph of the operation of the speed reducer according to the operation time length and the input torque, wherein the horizontal axis of the curve graph is the operation time length, and the vertical axis of the curve graph is the input torque; the input torque corresponding to the curve with the vertical axis greater than zero is determined as the first torque, and the input torque corresponding to the curve with the vertical axis less than zero is determined as the second torque.
FIG. 3 is a graph of input torque versus operating time for a retarder, establishing an abscissa axis (x-axis) based on the operating time of the retarder during a cycle, recording output torque for each instance in the entire operating time of the retarder, and establishing an ordinate axis (y-axis) based on input torque for the retarder during the entire operating time; a graph as shown in fig. 3 is then established, based on the x-axis and the y-axis, as shown in fig. 3,the torque generated by the speed reducer when the input shaft and the output shaft run in the same direction is recorded as a value larger than zero, such as 20 nm (N.m), 40 N.m, 60 N.m, 80 N.m, 100 N.m; the torque generated by the speed reducer when the input shaft and the output shaft are operated in opposite directions is recorded as a value smaller than zero, such as-20 N.m, -40 N.m, -60 N.m, -80 N.m. The torque above the x-axis is recorded as the positive torque T of the retarder + (i.e., the first torque) and the torque below the x-axis is taken as the negative torque T of the speed reducer - (i.e., a second torque); the x-axis of the graph shown in fig. 3 also marks the operating time of the retarder, e.g. 600 seconds(s), 1200s, 1800s.
Step S206, determining the operation efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss.
In step S206, the efficiency of the retarder operating under the circulation condition at the above operation parameter, the power loss of each component in the retarder operating under the circulation condition at the above operation parameter, and the ratio of the power loss of each component in the retarder to the total power loss are determined according to the operation parameter of the retarder under the circulation condition obtained in step S202 and the power loss of the retarder operating under the circulation condition determined in step S204.
According to an alternative embodiment of the application, determining the efficiency of the retarder operating in the circulation mode from the input torque, the total power loss and the operating time length comprises: determining a second power of the speed reducer according to the second torque, the input rotating speed, the second type of loss parameters and the third type of loss parameters; determining a sum of the first power and the second power, and determining a difference between the sum of the first power and the second power and the total power loss; determining a first integral of the sum of the first power and the second power over the operating period and a second integral of the difference over the operating period, respectively; the ratio of the first integrated value and the second integrated value is determined as the efficiency of the operation of the retarder in the circulation mode.
In the present embodiment, the following is usedThe method determines the efficiency P of the operation of the retarder in the cyclical operating mode with the operating parameter in step S202 cir First, according to the negative torque T of the speed reducer - (i.e., the second torque), input speed n, second type of loss parameter, and third type of loss parameter determine negative torque input power P when the retarder is operating with the operating information in step S202 - (i.e., a second power); next, according to the formulaDetermining the efficiency P of the retarder operating in the circulation regime with the operating parameters in step S202 cir Wherein t is the operation duration of the speed reducer under the circulation working condition, namely the operation duration in the operation information acquired in the step S202; />I.e. the second integral value>I.e. the first integrated value.
According to further alternative embodiments of the present application, determining a second power of the retarder based on the second torque, the input speed, the second type of loss parameter, and the third type of loss parameter comprises: determining a second product of the second torque and the input rotational speed; and determining the sum of the ratio of the second product to the unit conversion coefficient, the second type of loss parameters and the third type of loss parameters as second power.
In other alternative embodiments, the internal negative torque gear mesh loss P of the retarder in the second type of loss parameters obtained by the above embodiments g- And negative torque bearing friction loss P inside the reducer b- And oil seal friction loss P inside the reduction gear in the third type of loss parameter s And system churning loss P c Thereafter, according to the formulaSolving for the negative torque input power P of the retarder when operating with the operating information in step S202 - (i.e. the firstTwo powers).
According to an alternative embodiment of the application, determining the ratio of the power loss to the total power loss at each location in the retarder comprises: determining a third integrated value of a sum of a first gear mesh loss parameter of the first type of loss parameters and a second gear mesh loss parameter of the second type of loss parameters over an operating duration; determining a ratio of the third integrated value to a fourth integrated value of the total power loss over the operating period as a first ratio of the retarder gear mesh loss to the total power loss; determining a fifth integrated value of the sum of the first bearing friction loss parameter of the first type of loss parameters and the second bearing friction loss parameter of the second type of loss parameters over the operating time period; determining a ratio of the fifth integrated value to the fourth integrated value as a second proportion of the friction loss of the reducer bearing to the total power loss; determining a sixth integral value of the oil seal friction loss parameter in the third type of loss parameters in the operation time period; determining the ratio of the sixth integral value to the fourth integral value as a third proportion of the oil seal friction loss of the speed reducer to the total power loss; determining a seventh integral value of the system churning loss parameter in the third class of loss parameters in the operation time period; the ratio of the seventh integrated value to the fourth integrated value is determined as a fourth proportion of the churning loss of the retarder to the total power loss.
The embodiment of the application determines the component with the largest power loss by determining the proportion of the power loss of each component in the speed reducer to the total power loss of the speed reducer, so that the component is improved later to reduce the power loss of the speed reducer; in this embodiment, therefore, the power loss of each component in the retarder is first determined, and the ratio of the power loss of each component to the total power loss of the retarder is determined, wherein the gear mesh power loss is the (first) ratio of the total power lossWherein (1)>I.e. the third integral value->I.e. the fourth integrated value. Bearing friction power loss (second) proportion of total power loss +.>Wherein (1)>I.e. the fifth integrated value. Oil seal friction power loss (third) proportion of total power loss +.>Wherein (1)>I.e. the sixth integrated value. The system churning power loss is a (fourth) proportion of the total power loss>Wherein (1)>I.e. the seventh integrated value.
Through the steps, the total power loss generated when the speed reducer operates under the circulation working condition and the power loss of each part in the speed reducer can be determined based on the torque and the rotation speed of the circulation working condition of the speed reducer and the power loss data of each part in the speed reducer; the proportion of the power loss of each component in the speed reducer in the total power loss is determined based on the total power loss of the speed reducer and the power loss of each component in the speed reducer, so that the component with higher power loss in the speed reducer is positioned.
Fig. 4 is a block diagram of an apparatus for determining efficiency of a decelerator according to an embodiment of the present application, which includes: the obtaining module 40 is configured to obtain operation information of the speed reducer under a circulation condition, where the operation information includes: input torque, run length, and input speed; a first determination module 42 for determining a total power loss of the retarder during operation in the circulation mode based on the input torque and the input speed; the second determining module 44 is configured to determine an efficiency of the speed reducer operating under the circulation condition according to the input torque, the total power loss and the operation duration, and a proportion of the power loss of each portion in the speed reducer to the total power loss.
Fig. 5 is a flowchart of the operation of the device for determining the efficiency of the speed reducer, and as shown in fig. 5, the device starts to operate, and the acquisition module 40 acquires the operation information of the speed reducer, such as the input torque T, the operation duration T, the input rotation speed n, and the like, when the speed reducer operates under the circulation condition. Classifying the input torque T as positive torque T after the input torque T is acquired based on a graph of the input torque T versus the operating time T of the speed reducer as shown in fig. 3 + And negative torque T - . And based on positive torque T + Negative torque T - And determining the operation efficiency and the lost power of the speed reducer when the speed reducer operates under the circulation working condition according to the operation information, wherein the operation efficiency of the speed reducer comprises: positive torque input power P + And negative torque input power P - The method comprises the steps of carrying out a first treatment on the surface of the The lost power includes: positive torque gear mesh loss P g+ Negative torque gear mesh loss P g- Friction loss P of positive torque bearing b+ Friction loss P of negative torque bearing b- Friction loss P of oil seal s And system churning loss P c . Next, determining, by the first determining module 42, a total power loss P of the retarder when operating in the circulation mode with the above-described operation information based on the above-described operation efficiency and the loss power a . Finally, the second determination module 44 determines the total power loss P of each component of the speed reducer according to the operation efficiency and the loss power a And the efficiency P of the speed reducer operating in the circulation mode with the above operating information cir 。
It should be noted that, the preferred implementation manner of the embodiment shown in fig. 4 may refer to the related description of the embodiment shown in fig. 2, which is not repeated herein.
The embodiment of the application also provides a nonvolatile storage medium, wherein the nonvolatile storage medium stores a computer program, and the device in which the nonvolatile storage medium is arranged executes the method for determining the efficiency of the speed reducer by running the computer program.
The above-described nonvolatile storage medium is used to store a program that performs the following functions: acquiring operation information of the speed reducer under a circulation working condition, wherein the operation information comprises: input torque, run length, and input speed; determining total power loss generated by the operation of the speed reducer under a circulation working condition according to the input torque and the input rotating speed; and determining the operation efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss.
The embodiment of the application also provides an electronic device comprising a memory in which a computer program is stored and a processor arranged to perform the above method of determining the efficiency of a retarder by means of the computer program.
The processor in the electronic device is configured to execute a program that performs the following functions: acquiring operation information of the speed reducer under a circulation working condition, wherein the operation information comprises: input torque, run length, and input speed; determining total power loss generated by the operation of the speed reducer under a circulation working condition according to the input torque and the input rotating speed; and determining the operation efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss.
The respective modules in the above-described device for determining the efficiency of the speed reducer may be program modules (for example, a set of program instructions for implementing a specific function), or may be hardware modules, and for the latter, they may take the following forms, but are not limited thereto: the expression forms of the modules are all a processor, or the functions of the modules are realized by one processor.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the related art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (10)
1. A method of determining efficiency of a retarder, comprising:
acquiring operation information of the speed reducer under a circulation working condition, wherein the operation information comprises: input torque, run length, and input speed;
determining total power loss generated by the operation of the speed reducer under the circulation working condition according to the input torque and the input rotating speed;
and determining the operating efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation time length, and the proportion of the power loss of each part in the speed reducer to the total power loss.
2. The method of claim 1, wherein determining a total power loss resulting from operation of the retarder under the cycling conditions based on the operating information comprises:
dividing the input torque into a first torque and a second torque;
determining a first power and a first type of loss parameters of the speed reducer according to the first torque and the input rotating speed, wherein the first type of loss parameters are operation parameters related to the first torque inside the speed reducer;
determining a second type of loss parameter and a third type of loss parameter of the speed reducer according to the second torque and the input rotating speed, wherein the second type of loss parameter is an operation parameter related to the second torque in the speed reducer, and the third type of loss parameter is an operation parameter related to the input rotating speed in the speed reducer;
and determining the sum of the first type of loss parameters, the second type of loss parameters and the third type of loss parameters as total power loss generated by the operation of the speed reducer under the circulation working condition.
3. The method of claim 2, wherein dividing the input torque into a first torque and a second torque comprises:
determining a graph of the operation of the speed reducer according to the operation time length and the input torque, wherein the horizontal axis of the graph is the operation time length, and the vertical axis of the graph is the input torque;
and determining the input torque corresponding to the curve with the vertical axis larger than zero as the first torque, and determining the input torque corresponding to the curve with the vertical axis smaller than zero as the second torque.
4. The method of claim 2, wherein determining an efficiency of the retarder operation in the circulation regime based on the input torque, the total power loss, and the run length comprises:
determining a second power of the speed reducer according to the second torque, the input rotating speed, the second type of loss parameters and the third type of loss parameters;
determining a sum of the first power and the second power and determining a difference between the sum of the first power and the second power and the total power loss;
determining a first integral of the sum of the first power and the second power over the operating period and a second integral of the difference over the operating period, respectively;
and determining the ratio of the first integral value and the second integral value as the efficiency of the speed reducer operating under the circulation working condition.
5. The method of claim 2, wherein determining the first power of the retarder based on the first torque and the input rotational speed comprises:
determining a first product of the first torque and the input rotational speed;
and obtaining a unit conversion coefficient of the speed reducer, and determining the ratio of the first product to the unit conversion coefficient as the first power.
6. The method of claim 5, wherein determining the second power of the retarder based on the second torque, the input speed, the second type of loss parameter, and the third type of loss parameter comprises:
determining a second product of the second torque and the input rotational speed;
determining the sum of the ratio of the second product to the unit conversion coefficient and the second type of loss parameters and the third type of loss parameters as the second power.
7. The method of claim 2, wherein determining a ratio of power loss at each location in the retarder to the total power loss comprises:
determining a third integrated value of a sum of a first gear engagement loss parameter of the first type of loss parameters and a second gear engagement loss parameter of the second type of loss parameters over the operating period; determining a ratio of the third integrated value to a fourth integrated value of the total power loss over the operating period as a first proportion of a retarder gear mesh loss to the total power loss;
determining a fifth integrated value of a sum of a first bearing friction loss parameter of the first type of loss parameters and a second bearing friction loss parameter of the second type of loss parameters over the operating period; determining a ratio of the fifth integrated value to the fourth integrated value as a second proportion of the friction loss of the retarder bearing to the total power loss;
determining a sixth integral value of the oil seal friction loss parameter in the third type of loss parameter in the operation duration; determining the ratio of the sixth integral value to the fourth integral value as a third proportion of the friction loss of the oil seal of the speed reducer to the total power loss;
determining a seventh integral value of the system churning loss parameter in the third type of loss parameter in the operation duration; and determining the ratio of the seventh integral value to the fourth integral value as a fourth proportion of the oil churning loss of the speed reducer to the total power loss.
8. An apparatus for determining the efficiency of a speed reducer, comprising:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the operation information of the speed reducer under the circulation working condition, and the operation information comprises: input torque, run length, and input speed;
the first determining module is used for determining total power loss generated by the operation of the speed reducer under the circulation working condition according to the input torque and the input rotating speed;
and the second determining module is used for determining the operating efficiency of the speed reducer under the circulation working condition according to the input torque, the total power loss and the operation duration, and the proportion of the power loss of each part in the speed reducer to the total power loss.
9. A non-volatile storage medium, wherein a computer program is stored in the non-volatile storage medium, and wherein the method of determining the efficiency of a retarder according to any of claims 1 to 7 is performed by running the computer program on a device in which the non-volatile storage medium is located.
10. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to execute the method of determining the efficiency of a retarder according to any of claims 1-7 by means of the computer program.
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| CN202310660091.0A CN116611259A (en) | 2023-06-05 | 2023-06-05 | Method and device for determining efficiency of speed reducer and nonvolatile storage medium |
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| CN202310660091.0A CN116611259A (en) | 2023-06-05 | 2023-06-05 | Method and device for determining efficiency of speed reducer and nonvolatile storage medium |
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