CN113295407B - Method and device for detecting broken shaft of gearbox and engineering vehicle - Google Patents
Method and device for detecting broken shaft of gearbox and engineering vehicle Download PDFInfo
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- CN113295407B CN113295407B CN202110772533.1A CN202110772533A CN113295407B CN 113295407 B CN113295407 B CN 113295407B CN 202110772533 A CN202110772533 A CN 202110772533A CN 113295407 B CN113295407 B CN 113295407B
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- 238000011217 control strategy Methods 0.000 claims description 17
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
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Abstract
The invention relates to the technical field of engineering vehicles, in particular to a broken shaft detection method and device of a gearbox and the engineering vehicle, wherein the broken shaft detection method comprises the steps of obtaining rotation speed values of two ends of a shaft where each clutch in a target gearbox is located and working parameters of each clutch; determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is positioned; and comparing the working parameters of the reference clutch with preset conditions to determine the target clutch with the broken shaft. The reference clutch with the possibility of shaft breakage can be detected through the rotation speed value, and the shaft breakage detection is carried out by combining the working parameters of the reference clutch, so that the abnormality of the rotation speed value caused by the reasons of the clutch, such as slipping, can be eliminated, and the accuracy of the shaft breakage detection is improved.
Description
Technical Field
The invention relates to the technical field of engineering vehicles, in particular to a broken shaft detection method and device of a gearbox and an engineering vehicle.
Background
The gearboxes carried in engineering vehicles are mainly of two types, planetary wheels and fixed axles. For off-road cabinet vehicles working with large torque, such as a loader, the input torque borne by the gearbox is very large, and particularly the loader frequently performs a bad working condition of switching the direction of the speed D/R of the vehicle. Thus, for gearboxes, the likelihood of a broken shaft inside the gearbox increases with the age of its operation. Therefore, it is necessary to accurately detect whether the transmission is broken during operation of the transmission.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a method for detecting a broken shaft of a gearbox, so as to solve the problem of accurately detecting the broken shaft.
According to a first aspect, an embodiment of the present invention provides a method for detecting a broken shaft of a gearbox, including:
Acquiring the rotating speed values of two ends of a shaft where each clutch in the target gearbox is positioned and working parameters of each clutch;
Determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is positioned;
And comparing the working parameters of the reference clutch with preset conditions to determine the target clutch with the broken shaft.
According to the method for detecting the broken shaft of the gearbox, provided by the embodiment of the invention, the reference clutch with the broken shaft possibly can be detected through the rotating speed value, and the broken shaft detection is carried out by combining the working parameters of the reference clutch, so that the abnormal rotating speed value caused by the reasons of the clutch, such as slipping, can be eliminated, and the accuracy of the broken shaft detection is improved.
With reference to the first aspect, in a first implementation manner of the first aspect, the determining, based on the rotational speed values of two ends of the shaft where the respective clutches are located, a reference clutch that there is a possibility of shaft breakage includes:
calculating the ratio of the rotating speed values of the two ends of the shaft where each clutch is positioned, and determining the working speed ratio;
and comparing the working speed ratio with a target speed ratio to determine the reference clutch.
According to the method for detecting the broken shaft of the gearbox, provided by the embodiment of the invention, the reference clutch is determined by calculating the ratio of the rotating speed values at the two ends of the shaft, namely, by utilizing the working speed ratio, and the accuracy of the reference clutch determination can be improved because the working speed ratio is a relative quantity.
With reference to the first aspect or the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the operating parameter includes an operating oil pressure, and/or the input torque, and the comparing the operating parameter of the reference clutch with a preset condition, determines that a target clutch with a broken shaft exists includes:
And when the working oil pressure of the reference clutch is larger than the preset oil pressure and/or the input torque of the reference clutch is smaller than the preset torque, determining that the reference clutch is a target clutch with a broken shaft.
According to the method for detecting the broken shaft of the gearbox, provided by the embodiment of the invention, the working oil pressure is larger than the preset oil pressure, the reference clutch is not slipped, the input torque is smaller than the preset torque, the abnormal working speed ratio is not caused by slipping when the input torque is smaller, and the accuracy of confirming the target clutch is further ensured.
With reference to the first aspect, in a third implementation manner of the first aspect, the method for detecting a broken shaft further includes:
Determining a type of the target clutch;
A control strategy for the target clutch is determined based on the type of the target clutch.
According to the method for detecting the broken shaft of the gearbox, provided by the embodiment of the invention, different control strategies are set for different types of target clutches, so that the different types of target clutches can process broken shaft faults by using different control strategies, normal operation of the engineering vehicle is ensured, normal use of the engineering vehicle is prevented from being influenced due to broken shaft, and stability and durability of the gearbox are improved.
With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, when the type of the target clutch is a directional clutch, the determining, based on the type of the target clutch, a control strategy of the target clutch includes:
and controlling the target gearbox to enter a limp mode.
With reference to the third implementation manner of the first aspect, in a first implementation manner, when the type of the target clutch is a gear clutch, the determining, based on the type of the target clutch, a control strategy of the target clutch includes:
Disabling the target clutch and storing fault information for the target clutch;
In a driving cycle of a continuous preset number of times, determining whether the same target clutch has a broken shaft;
The target clutch is permanently disabled when there is a shaft break with the same target clutch.
According to the method for detecting the broken shaft of the gearbox, provided by the embodiment of the invention, the existence of the broken shaft of the target clutch is verified through the driving circulation of the preset times, so that the accuracy of the determined target clutch is ensured.
According to a second aspect, an embodiment of the present invention further provides a device for detecting a broken shaft of a gearbox, including:
the acquisition module is used for acquiring the rotating speed values of the two ends of the shaft where each clutch is positioned in the target gearbox and the working parameters of each clutch;
the reference determining module is used for determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is located;
And the target determining module is used for comparing the working parameters of the reference clutch with preset conditions and determining the target clutch with the broken shaft.
According to the broken shaft detection module of the gearbox, provided by the embodiment of the invention, the reference clutch with the broken shaft possibly can be detected through the rotating speed value, and the broken shaft detection is carried out by combining the working parameters of the reference clutch, so that the abnormal rotating speed value caused by the reasons of the clutch, such as slipping, can be eliminated, and the accuracy of broken shaft detection is improved.
According to a third aspect, an embodiment of the present invention provides an engineering vehicle, including: the transmission shaft breakage detection method comprises the steps of storing computer instructions in a memory, and executing the computer instructions by the processor, so as to execute the transmission shaft breakage detection method according to the first aspect or any implementation manner of the first aspect.
With reference to the third aspect, in a first implementation manner of the third aspect, the engineering vehicle further includes:
And the at least one speed detection device is arranged in the target gearbox and used for detecting the speed value of the two ends of the shaft where the clutch is positioned, and the at least one speed detection device is connected with the processor.
According to the engineering vehicle provided by the embodiment of the invention, the rotating speed value at the two ends of the shaft where the clutch is located is detected by arranging at least one rotating speed detection device, so that the rotating speed value can be obtained on one hand, and the accuracy of the rotating speed value can be ensured by mutually checking a plurality of rotating speed detection devices, and further, the rotating speed detection devices can be used for detecting the rotating speed values at the two ends of the shaft and detecting other rotating speeds.
According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the method for detecting a broken shaft of a gearbox according to the first aspect or any implementation manner of the first aspect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of an alternative construction of a target gearbox according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of detecting a broken axle of a gearbox according to an embodiment of the invention;
FIG. 3 is a flow chart of a method of detecting a broken axle of a gearbox according to an embodiment of the invention;
FIG. 4 is a flow chart of a method of detecting a broken axle of a gearbox according to an embodiment of the invention;
FIG. 5 is a flow chart of a method of detecting a broken axle of a gearbox according to an embodiment of the invention;
FIG. 6 is a block diagram of a broken axle detection device of a gearbox according to an embodiment of the invention;
fig. 7 is a schematic hardware structure of an engineering vehicle according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method for detecting the broken shaft of the gearbox is used for detecting whether the shaft of the clutch in the gearbox is broken or not. If a plurality of clutches are arranged in the gearbox, whether the shaft where each clutch is positioned is broken or not is detected so as to determine which clutch or clutches are broken. The specific broken axle detection method is executed by a processor in the engineering vehicle.
Further, the embodiment of the invention also provides a control strategy after the shaft breakage occurs. Specifically, different control strategies are set for different clutch types.
Fig. 1 shows a schematic diagram of a structure of a transmission, in which a black solid line portion represents a related structure of a gear and a black hollow line portion represents a related structure of a shaft in fig. 1. The transmission is a transmission of four forward gears and three reverse gears, and includes 6 clutches, namely, a clutch 31, a clutch 32, a clutch 33, a clutch 34, a clutch 35, and a clutch 36, and a torque converter 2. One end of the torque converter 2 is connected to the engine 1, and the other end is connected to an input of the transmission. The torque converter 2 is used to convert the rotational speed of the engine into the input torque of the gearbox.
The clutch 34, the clutch 35 and the clutch 36 respectively represent three gear positions, and when the clutch 31 is engaged with the clutch 34, the forward 1 gear is represented; when clutch 31 is engaged with clutch 35, this indicates that forward 2 is now engaged; when clutch 31 is engaged with clutch 36, this indicates that forward 3-speed is now being achieved; when clutch 32 is engaged with clutch 34-clutch 36, respectively, a reverse 1-reverse 3 is indicated; when clutch 33 is engaged with any of clutches 34-36, forward 4-gear is indicated.
As shown in fig. 1, each clutch corresponds to one shaft, and by detecting the shaft breakage of the shaft where each clutch is located, the clutch where the shaft breakage occurs can be accurately determined, so as to give a corresponding control strategy.
According to an embodiment of the present invention, there is provided a method embodiment of a disconnection detection of a transmission, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical sequence is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than what is shown or described herein.
In this embodiment, a method for detecting a broken shaft of a gearbox is provided, which may be used in the engineering vehicle, such as a loader, an excavator, etc., and fig. 2 is a flowchart of a method for detecting a broken shaft of a gearbox according to an embodiment of the present invention, as shown in fig. 2, where the flowchart includes the following steps:
S11, obtaining the rotating speed values of the two ends of the shaft where each clutch in the target gearbox is located and the working parameters of each clutch.
The rotating speed values at the two ends of the shaft can be measured by arranging rotating speed sensors at the two ends of the shaft respectively. The number of the rotation speed sensors can be 1,2 or more, and the rotation speed sensors can be correspondingly set according to actual demands.
When 1 rotation speed sensor is arranged, the rotation speed of one end of the shaft where one clutch is positioned is measured, and the rotation speed of the other end of the shaft where the clutch is positioned and the rotation speeds of the two ends of the shaft where the other clutches are positioned can be calculated by adopting the speed ratio of the gears; when a plurality of rotating speed sensors are arranged, when the speed ratio of the gear is utilized to calculate the result, the measuring results of other rotating speed sensors are utilized to carry out mutual verification so as to improve the accuracy of the rotating speed values of the two ends of the shaft where each clutch is positioned.
Alternatively, the rotational speed value of the two ends of the shaft where the clutch is located can also be measured by the cooperation of the counter and the timer. Specifically, the two ends of the shaft where the clutch is located are respectively provided with a counter for counting the rotation turns of the shaft. For example, when the gearbox is started, a timer is triggered to start timing, the rotation number of the shaft where each clutch is located is counted, and the rotation number and timing time are utilized to obtain the rotation speed value of the two ends of the shaft where each clutch is located.
The operation parameters of the respective clutches are used to exclude the case of abnormal rotation speed values due to the clutches themselves, for example, clutch slip, etc. The operating parameters of the clutch include operating oil pressure, or input torque. The working oil pressure is measured by an oil pressure sensor in the clutch, and the input torque is calculated by the torque converter 2, and the input torque is the output torque of the torque converter 2.
S12, determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is located.
Under the normal working condition of the clutch, the relation between the rotating speed values of the two ends of the shaft of each clutch is in a preset range, and if the relation between the rotating speed values of the two ends of the shaft of each clutch is not in the preset range through calculation, the possibility of shaft breakage of the clutch is indicated. Among them, the clutch having the possibility of shaft breakage is referred to as a reference clutch.
The preset range can be obtained through multiple experiments, can be obtained through calculation according to working parameters of each mechanism, or can be set manually, is not limited, and can be set correspondingly according to actual requirements.
Alternatively, the relationship between the rotational speed values of the respective clutches at the both ends of the shaft may be a proportional relationship, a differential relationship, or the like.
This step will be described in detail later in detail.
S13, comparing the working parameters of the reference clutch with preset conditions to determine the target clutch with the broken shaft.
The processor extracts working parameters of the reference clutch after determining the reference clutch, compares the working parameters with preset conditions, and determines a target clutch with a broken shaft. Specifically, the preset conditions may be determined through multiple experiments, or may be set manually, or may be calculated according to parameters of each mechanism, or the like.
When the clutch works normally, the working parameters of the clutch meet the preset conditions. If the working parameters of the reference clutch are compared with the preset conditions, and the working parameters of the reference clutch are determined to not meet the preset conditions, the reference clutch can be determined to have a broken shaft, and the broken shaft is defined as a target clutch.
According to the method for detecting the broken shaft of the gearbox, the reference clutch with the broken shaft possibly can be detected through the rotation speed value, and the broken shaft detection is carried out by combining the working parameters of the reference clutch, so that the phenomenon that the rotation speed value is abnormal due to the reasons of the clutch, such as slipping, can be eliminated, and the accuracy of broken shaft detection is improved.
In this embodiment, a method for detecting a broken shaft of a gearbox is provided, which may be used in the engineering vehicle, such as a loader, an excavator, etc., and fig. 3 is a flowchart of a method for detecting a broken shaft of a gearbox according to an embodiment of the present invention, as shown in fig. 3, where the flowchart includes the following steps:
S21, obtaining the rotating speed values of the two ends of the shaft where each clutch in the target gearbox is located and the working parameters of each clutch.
Please refer to the embodiment S11 shown in fig. 2 in detail, which is not described herein.
S22, determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is located.
Specifically, the step S22 may include:
s221, calculating the ratio of the rotating speed values of the two ends of the shaft where each clutch is located, and determining the working speed ratio.
And corresponding to each clutch, the processor calculates the ratio of the rotating speed values at the two ends of the shaft to obtain the corresponding working speed ratio of each clutch.
S222, comparing the working speed ratio with the target speed ratio to determine a reference clutch.
As described above, the target speed ratio should be within a certain range under normal clutch operation. Therefore, the processor compares the operating speed ratio with the target speed ratio to determine whether the clutch is likely to be broken, and further to determine the reference clutch.
S23, comparing the working parameters of the reference clutch with preset conditions to determine the target clutch with the broken shaft.
Wherein the operating parameter comprises operating oil pressure, and/or input torque. And when the working oil pressure of the reference clutch is larger than the preset oil pressure and/or the input torque of the reference clutch is smaller than the preset torque, determining that the reference clutch is a target clutch with a broken shaft.
Alternatively, before the disconnection detection is performed, it may be determined whether the basic condition of the disconnection detection is satisfied. That is, the vehicle is traveling in the normal direction D/R, and the shift position is also engaged.
Taking the gearbox shown in fig. 1 as an example, 3 rotation speed sensors are arranged in the gearbox, wherein the rotation speed sensor ① is arranged at the output end of the hydraulic torque converter 2, the rotation speed sensor ② is arranged at one end of the shaft where the clutch 31 is arranged, and the rotation speed sensor ③ is arranged at the output shaft. The working oil pressure of the clutch can be obtained through an oil pressure sensor, the input torque can also be calculated according to the characteristics of the hydraulic torque converter, and specifically, the method for detecting the disconnection of the shafts of the 6 clutches in the gearbox shown in fig. 1 is as follows:
(1) The following conditions are satisfied for determining that the shaft of the clutch 31 is broken:
Determining a speed ratio at both ends of a shaft where the clutch 31 is located by using measurement results of the rotation speed sensors ① and ②, wherein the difference between the speed ratio and a target speed ratio exceeds a certain value;
The operating oil pressure of the clutch 31 is greater than a certain value;
The input torque is less than a certain value.
(2) The following conditions are satisfied for determining that the shaft on which the clutch 32 is located is broken:
Determining a speed ratio at both ends of a shaft where the clutch 32 is located by using measurement results of the rotation speed sensors ① and ②, wherein the difference between the speed ratio and a target speed ratio exceeds a certain value;
the operating oil pressure of the clutch 32 is greater than a certain value;
The input torque is less than a certain value.
(3) The following conditions are satisfied for determining the shaft breakage of the clutch 33:
Determining a speed ratio at both ends of a shaft where the clutch 33 is located by using measurement results of the rotation speed sensors ① and ②, wherein the difference between the speed ratio and a target speed ratio exceeds a certain value;
the operating oil pressure of the clutch 33 is greater than a certain value;
The input torque is less than a certain value.
(4) The following conditions are satisfied for determining the axle break of the clutch 34:
Determining a speed ratio at both ends of a shaft where the clutch 34 is located by using measurement results of the rotation speed sensors ② and ③, wherein the difference between the speed ratio and a target speed ratio exceeds a certain value;
the operating oil pressure of the clutch 34 is greater than a certain value;
The input torque is less than a certain value.
(5) The following conditions are satisfied for determining the axle breakage of the clutch 35:
Determining a speed ratio at both ends of a shaft where the clutch 35 is located by using measurement results of the rotation speed sensors ② and ③, wherein the difference between the speed ratio and a target speed ratio exceeds a certain value;
The operating oil pressure of the clutch 31 is greater than a certain value;
The input torque is less than a certain value.
(6) The following conditions are satisfied for determining the axle break of the clutch 36:
Determining a speed ratio at both ends of a shaft where the clutch 36 is located by using measurement results of the rotation speed sensors ② and ③, wherein the difference between the speed ratio and a target speed ratio exceeds a certain value;
the operating oil pressure of the clutch 36 is greater than a certain value;
The input torque is less than a certain value.
The input torque and the working oil pressure of each clutch are verified mutually through the measurement results of the 3 rotating speed sensors, so that whether the shafts of the 6 clutches are broken or not is further determined. Under the condition of small torque input of the gearbox, if the lockup oil pressure of the clutch is constant and large, the slip difference of two ends is large, the clutch can be diagnosed as broken shaft.
According to the method for detecting the broken shaft of the gearbox, provided by the embodiment, the reference clutch is determined by calculating the ratio of the rotating speed values at the two ends of the shaft, namely, the working speed ratio is the relative quantity, so that the accuracy of determining the reference clutch can be improved. The working oil pressure is larger than the preset oil pressure, the reference clutch is not slipped, the input torque is smaller than the preset torque, the abnormal working speed ratio is not caused by slipping when the input torque is smaller, and the accuracy of target clutch confirmation is further ensured.
In this embodiment, a method for detecting a broken shaft of a gearbox is provided, which may be used in the engineering vehicle, such as a loader, an excavator, etc., and fig. 4 is a flowchart of a method for detecting a broken shaft of a gearbox according to an embodiment of the present invention, as shown in fig. 4, where the flowchart includes the following steps:
s31, obtaining the rotating speed values of the two ends of the shaft where each clutch in the target gearbox is located and the working parameters of each clutch.
Please refer to the embodiment S21 shown in fig. 3 in detail, which is not described herein.
S32, determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is located.
Please refer to the embodiment S22 shown in fig. 3 in detail, which is not described herein.
S33, comparing the working parameters of the reference clutch with preset conditions to determine the target clutch with the broken shaft.
Please refer to the embodiment S23 shown in fig. 3 in detail, which is not described herein.
S34, determining the type of the target clutch.
The types of the target clutch include a directional clutch and a gear clutch, and the types of the respective clutches are stored in advance in the processor. Accordingly, after the target clutch is determined, the type corresponding to the target clutch can be queried.
Of course, the type of the target clutch may also be determined by the set position of the target clutch. The processor may have stored therein the position of each clutch and the connection between each clutch and other mechanisms. Therefore, by using the position of the target clutch, it can be determined whether it belongs to the directional clutch or the gear clutch.
S35, determining a control strategy of the target clutch based on the type of the target clutch.
Control strategies corresponding to different clutch types may be stored in the processor, for example, when the type of target clutch is a directional clutch, the target gearbox is controlled to enter a limp-home mode, so that the engineering vehicle enters a slow running mode.
When the type of the target clutch is a gear clutch, the above S35 may include:
(1) The target clutch is disabled and fault information for the target clutch is stored.
(2) In a continuous preset number of driving cycles, it is determined whether there is a shaft break with the same target clutch.
(3) When there is a shaft break in the same target clutch, the target clutch is permanently disabled.
Specifically, when it is determined that the target clutch is a directional clutch, the running of the engineering vehicle is not affected due to the gear. Thus, the target clutch may be disabled first, storing the corresponding fault information.
After a continuous preset number of driving cycles, it is again determined whether the target clutch in which the disconnection occurs is the same clutch. When the same clutch is determined, the target clutch is permanently disabled. If the clutch is not the same clutch, the disabling strategy can be released, other strategies can be adopted for processing, the clutch is not limited, and the corresponding setting can be carried out according to actual requirements.
According to the method for detecting the broken shaft of the gearbox, different control strategies are set for different types of target clutches, so that the different types of target clutches can process broken shaft faults by using different control strategies, normal operation of the engineering vehicle is guaranteed, normal use of the engineering vehicle is prevented from being influenced due to broken shaft, and stability and durability of the gearbox are improved.
Taking engineering equipment as a loader for example, as shown in fig. 5, the method for detecting the broken shaft of the gearbox may include: during the normal running process of the loader, firstly confirming whether the detection basic conditions are met; if the detection result is in conformity with the detection result, the shaft breakage detection is performed. After determining that a target clutch for a disconnect exists, different control strategies are determined based on different types. Specifically, when the target clutch is a directional clutch, a hill mode, i.e., limpHome mode, is entered; when the target clutch is a gear clutch, fault information is stored, the gear clutch is disabled, the shaft breakage fault of the same clutch is reported in two continuous driving cycles, and then the gear clutch is disabled permanently.
According to the method for detecting the broken shaft of the clutch, provided by the embodiment of the invention, the broken shaft is detected through speed ratio verification, clutch working oil pressure and input torque, so that the reliability of a broken shaft detection result can be ensured; further, after the shaft breakage fault is detected, corresponding control strategies are determined for different types of clutches, so that the engineering union can still work normally.
The embodiment also provides a device for detecting the broken shaft of the gearbox, which is used for realizing the embodiment and the preferred embodiment, and the description is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
The present embodiment provides a shaft breaking device of a gearbox, as shown in fig. 6, including:
the acquisition module 41 is used for acquiring the rotating speed values of the two ends of the shaft where each clutch in the target gearbox is positioned and the working parameters of each clutch;
a reference determining module 42, configured to determine a reference clutch with possibility of shaft breakage based on the rotational speed values of the two ends of the shaft where the respective clutches are located;
The target determining module 43 is configured to compare the working parameter of the reference clutch with a preset condition, and determine that the target clutch has a broken shaft.
According to the broken shaft detection module of the gearbox, the reference clutch with the broken shaft possibly can be detected through the rotation speed value, and the broken shaft detection is carried out by combining the working parameters of the reference clutch, so that the phenomenon that the rotation speed value is abnormal due to the reasons of the clutch, such as slipping, can be eliminated, and the accuracy of broken shaft detection is improved.
The disconnect device of the gearbox in this embodiment is presented in the form of a functional unit, here referred to as an ASIC circuit, a processor and memory executing one or more software or fixed programs, and/or other means for providing the above described functionality.
Further functional descriptions of the above respective modules are the same as those of the above corresponding embodiments, and are not repeated here.
The embodiment of the invention also provides an engineering vehicle, which is provided with the broken shaft detection device of the gearbox shown in the figure 6.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an engineering vehicle according to an alternative embodiment of the present invention, and as shown in fig. 7, the engineering vehicle may include: at least one processor 51, such as a CPU (Central Processing Unit ), at least one communication interface 53, a memory 54, at least one communication bus 52. Wherein the communication bus 52 is used to enable connected communication between these components. The communication interface 53 may include a Display screen (Display) and a Keyboard (Keyboard), and the selectable communication interface 53 may further include a standard wired interface and a wireless interface. The memory 54 may be a high-speed RAM memory (Random Access Memory, volatile random access memory) or a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 54 may alternatively be at least one memory device located remotely from the aforementioned processor 51. Wherein the processor 51 may be in conjunction with the apparatus described in fig. 6, the memory 54 stores an application program, and the processor 51 invokes the program code stored in the memory 54 for performing any of the method steps described above.
The communication bus 52 may be a peripheral component interconnect standard (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus, an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The communication bus 52 may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, only one thick line is shown in fig. 7, but not only one bus or one type of bus.
Wherein the memory 54 may include volatile memory (english) such as random-access memory (RAM); the memory may also include a nonvolatile memory (English: non-volatile memory), such as a flash memory (English: flash memory), a hard disk (English: HARD DISK DRIVE, abbreviation: HDD) or a solid state disk (English: solid-STATE DRIVE, abbreviation: SSD); memory 54 may also include a combination of the types of memory described above.
The processor 51 may be a central processor (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of CPU and NP.
The processor 51 may further include a hardware chip, among others. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof (English: programmable logic device). The PLD may be a complex programmable logic device (English: complex programmable logic device, abbreviated: CPLD), a field-programmable gate array (English: field-programmable GATE ARRAY, abbreviated: FPGA), a general-purpose array logic (English: GENERIC ARRAY logic, abbreviated: GAL), or any combination thereof.
Optionally, the memory 54 is also used for storing program instructions. The processor 51 may invoke program instructions to implement a method of detecting a broken axle of a gearbox as shown in the embodiments of figures 2 to 4 of the present application.
In some optional implementations of this embodiment, the engineering vehicle further includes: and the at least one speed detection device is arranged in the target gearbox and used for detecting the speed value of the two ends of the shaft where the clutch is positioned, and the at least one speed detection device is connected with the processor.
The number of the rotation speed detection devices may be 1,2 or more, and the corresponding setting may be specifically performed according to actual requirements. When 2 or more rotation speed detecting devices are provided, mutual verification of rotation speed values can be performed.
Alternatively, the rotation speed detecting device may be a rotation speed sensor, or may be a combination of the timer and the counter described above, or the like. The corresponding setting can be carried out according to actual requirements.
The rotating speed value of the two ends of the shaft where the clutch is located is detected by setting at least one rotating speed detection device, so that the rotating speed value can be obtained on one hand, and the accuracy of the rotating speed value can be guaranteed through mutual verification of a plurality of rotating speed detection devices. As shown in fig. 1, a rotational speed sensor may be used to detect the output rotational speed of the torque converter 2, and a rotational speed sensor may be used to detect the output rotational speed of the transmission.
The embodiment of the invention also provides a non-transitory computer storage medium, which stores computer executable instructions, and the computer executable instructions can execute the method for detecting the broken shaft of the gearbox in any method embodiment. Wherein the storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a hard disk (HARD DISK DRIVE, abbreviated as HDD), a Solid state disk (Solid-state-STATE DRIVE, SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (8)
1. The broken shaft detection method of the gearbox is characterized by comprising the following steps of:
Acquiring the rotating speed values of two ends of a shaft where each clutch in the target gearbox is positioned and working parameters of each clutch;
Determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is positioned;
comparing the working parameters of the reference clutch with preset conditions to determine a target clutch with a broken shaft;
the working parameters include working oil pressure and/or input torque, and the step of comparing the working parameters of the reference clutch with preset conditions to determine a target clutch with a broken shaft comprises the following steps:
When the working oil pressure of the reference clutch is greater than a preset oil pressure and/or the input torque of the reference clutch is smaller than a preset torque, determining that the reference clutch is a target clutch with a broken shaft;
The method for determining the reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where the clutches are located comprises the following steps:
calculating the ratio of the rotating speed values of the two ends of the shaft where each clutch is positioned, and determining the working speed ratio;
and comparing the working speed ratio with a target speed ratio to determine the reference clutch.
2. The method of claim 1, wherein the broken shaft detection method further comprises:
Determining a type of the target clutch;
A control strategy for the target clutch is determined based on the type of the target clutch.
3. The method of claim 2, wherein when the type of the target clutch is a directional clutch, the determining a control strategy for the target clutch based on the type of the target clutch comprises:
and controlling the target gearbox to enter a limp mode.
4. The method of claim 2, wherein when the type of the target clutch is a gear clutch, the determining a control strategy for the target clutch based on the type of the target clutch comprises:
Disabling the target clutch and storing fault information for the target clutch;
In a driving cycle of a continuous preset number of times, determining whether the same target clutch has a broken shaft;
The target clutch is permanently disabled when there is a shaft break with the same target clutch.
5. A broken axle detection device of gearbox, characterized by comprising:
the acquisition module is used for acquiring the rotating speed values of the two ends of the shaft where each clutch is positioned in the target gearbox and the working parameters of each clutch;
the reference determining module is used for determining a reference clutch with possibility of shaft breakage based on the rotating speed values of the two ends of the shaft where each clutch is located;
The target determining module is used for comparing the working parameters of the reference clutch with preset conditions and determining a target clutch with a broken shaft;
The operating parameters include operating oil pressure, and/or input torque, and the target determination module is specifically configured to:
When the working oil pressure of the reference clutch is greater than a preset oil pressure and/or the input torque of the reference clutch is smaller than a preset torque, determining that the reference clutch is a target clutch with a broken shaft;
the reference determining module is specifically configured to:
calculating the ratio of the rotating speed values of the two ends of the shaft where each clutch is positioned, and determining the working speed ratio;
and comparing the working speed ratio with a target speed ratio to determine the reference clutch.
6. An engineering vehicle, comprising:
a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of detecting a shaft breakage of a gearbox according to any one of claims 1-4.
7. The work vehicle of claim 6, further comprising:
and the at least one rotating speed detection device is arranged in the target gearbox and used for detecting rotating speed values of two ends of a shaft where the clutch is positioned, and the at least one rotating speed detection device is connected with the processor.
8. A computer-readable storage medium storing computer instructions for causing a computer to execute the disconnection detection method of the transmission according to any one of claims 1 to 4.
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| CN202110772533.1A CN113295407B (en) | 2021-07-08 | 2021-07-08 | Method and device for detecting broken shaft of gearbox and engineering vehicle |
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| CN202110772533.1A CN113295407B (en) | 2021-07-08 | 2021-07-08 | Method and device for detecting broken shaft of gearbox and engineering vehicle |
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| CN113295407B true CN113295407B (en) | 2024-05-07 |
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| CN113295407A (en) | 2021-08-24 |
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