Clutch assembly life prediction method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of engineering machinery, in particular to a clutch assembly service life prediction method and device, electronic equipment and a storage medium. The prediction method comprises the steps that the state of the clutch assembly is monitored; a first stroke of a piston in the hydraulic driving assembly for the clutch assembly to enter a second state from a first state is determined, the first state is a joint state, and the second state is a disengagement state; the first state is a disengaged state, and the second state is an engaged state; obtaining the weight of a first friction plate and a second friction plate in the clutch assembly fused into the lubricating oil; determining a wear thickness ratio between a first friction plate and a second friction plate in the clutch assembly; determining a first wear thickness of a wear-resistant layer on a first friction plate included in the clutch assembly based on the first stroke and the wear thickness ratio; determining the wear degree of the first friction plate based on the first wear thickness, and determining the wear rate of a wear-resistant layer of the first friction plate; and determining the remaining service life of the clutch assembly. The prediction method can monitor the residual life of the clutch assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a method, device, electronic equipment and storage medium for predicting the life of a clutch component. Background Art

[0002] The brake system is one of the important components of the car, and it is directly related to the comprehensive performance of the car and the safety of life and property. The brake system includes brake components, clutch components and hydraulic drive components. The clutch component is used to transmit the power of the power input component to the power output shaft, the brake component is used to achieve the braking of the power output shaft, and the hydraulic drive component is used to drive the brake component and the clutch component. The performance of the clutch component determines the efficiency of power transmission.

[0003] In order to ensure the stable driving of the car and the safety of the car, it is necessary to monitor the service life and wear of the clutch assembly. In the prior art, when monitoring the wear of the clutch assembly, it is generally done by monitoring the change in volume of the hydraulic oil in the hydraulic oil tank provided to the drive assembly each time the drive assembly drives the clutch assembly to engage, and determining the wear thickness of the friction plate in the clutch assembly based on the change in volume of the hydraulic oil in the hydraulic oil tank. This method is an indirect method of measuring the wear thickness of the friction plate, and the change in the volume of the hydraulic oil in the hydraulic oil tank will also be affected by environmental factors such as temperature, therefore, the accuracy of the test results will deteriorate. In addition, the monitoring method in the prior art is also unable to predict the remaining service life of the clutch assembly. Summary of the invention

[0004] The present invention provides a method, device, electronic device and storage medium for predicting the life of a clutch assembly. The prediction method can monitor the wear of the friction plate in the clutch assembly and replace the friction plate in time. It can also monitor the remaining service life of the clutch assembly so as to replace the friction plate in advance and improve the safety of the vehicle using the friction plate.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] In the first aspect, the present application provides a method for predicting the life of a clutch component. The method for predicting the life of a clutch component includes the following steps: monitoring the state of the clutch component; determining the first stroke of the piston in the hydraulic drive component of the clutch component from the first state to the second state, wherein if the first state is an engaged state, the second state is a disengaged state; if the first state is a disengaged state, the second state is an engaged state; obtaining the weight of the first friction plate and the second friction plate in the clutch component dissolved in the lubricating oil; determining the wear thickness ratio between the first friction plate and the second friction plate in the clutch component; determining the first wear thickness of the wear-resistant layer on the first friction plate included in the clutch component based on the first stroke and the wear thickness ratio between the first friction plate and the second friction plate; determining the wear degree of the first friction plate based on the first wear thickness; determining the wear rate of the wear-resistant layer of the first friction plate; and determining the remaining service life of the clutch component.

[0007] In the above method, the first wear thickness of the wear-resistant layer on the first friction plate included in the clutch assembly can be determined according to the first travel distance moved when the piston drives the clutch assembly from the first state to the second state and the wear thickness ratio between the first friction plate and the second friction plate, and the wear degree of the first friction plate can be determined according to the first wear thickness. The staff can determine the remaining thickness of the first friction plate according to the wear degree of the first friction plate and compare it with the set thickness of the first friction plate, and then determine whether the first friction plate and the second friction plate included in the clutch assembly need to be replaced. Among them, the set thickness of the first friction plate can be the minimum thickness of the first friction plate.

[0008] In addition, by monitoring the wear thickness ratio between the first friction plate and the second friction plate and calculating based on the weight of the first friction plate and the second friction plate dissolved in the lubricating oil, the accuracy of the wear thickness ratio between the first friction plate and the second friction plate can be improved. Moreover, the method can also obtain the wear rate of the first friction plate and the remaining service life of the clutch assembly, so that the user can replace the friction plate in advance and ensure the safety of using the clutch assembly.

[0009] In one embodiment, based on the first stroke and the wear thickness ratio between the first friction plate and the second friction plate, a first wear thickness of the wear-resistant layer on the first friction plate included in the clutch assembly is determined, including: determining a first total wear thickness of the friction pair included in the clutch assembly according to the difference between the first stroke and the specific stroke; confirming the wear thickness of each friction pair according to the first total wear thickness; confirming the first wear thickness of the wear-resistant layer on the first friction plate included in the friction pair according to the wear thickness of each friction pair.

[0010] In one embodiment, the step of determining the wear thickness ratio between the first friction plate and the second friction plate in the clutch assembly includes: obtaining an effective friction area of ​​a single surface of the second friction plate and an effective friction area of ​​a single surface of the first friction plate, wherein:

[0011] The total weight m of the M material particles in the first friction plate incorporated into the lubricating oil M The total weight of the W material particles in the second friction plate integrated into the lubricating oil is m W , the density of the material M used for the wear-resistant layer of the first friction plate is ρ M , the density of the material W used for the second friction plate is ρ W , the effective friction area of ​​the first friction plate on one side is S M , the effective friction area of ​​the second friction plate on one side is S W ;

[0012] The total thickness of the wear-resistant layer on one side of the first friction plate is H M =m M / (ρ M *S M );

[0013] The total thickness of the second friction plate worn on one side is H W =m W / (ρ W *S W );

[0014] The ratio of the wear thickness of the first friction plate wear layer to the wear thickness of the second friction plate wear layer is H. M / H w =m M *ρ W *S W / m W *ρ M *S M .

[0015] In one embodiment, if the first stroke is the stroke a1 of the piston at the first time t1, the specific stroke is the initial stroke a0 of the piston, and the first total wear thickness H of the friction pair in the time period 0-t1 is MW1 =a1-a0, wear thickness of each friction pair h MW1 =(a1-a0) / z, the first wear thickness of the wear-resistant layer on the first friction plate is:

[0016]

[0017] In one embodiment, if the first stroke a is the stroke a2 of the piston at the second moment t2, the specific stroke is the stroke a1 of the piston at the first moment t1, wherein the second moment is greater than the first moment; the wear thickness h of each friction pairMW2 =(a2-a1) / z, the first wear thickness of the wear-resistant layer on the first friction plate is:

[0018]

[0019] In one embodiment, determining the degree of wear of the first friction plate based on the first wear thickness includes: judging the remaining depth of the oil groove on the first friction plate according to the first wear thickness of the wear-resistant layer, and comparing the remaining depth of the oil groove with the set depth of the oil groove.

[0020] In one embodiment, the step of determining the first stroke of the piston in the hydraulic drive assembly when the clutch assembly enters the second state from the first state includes: obtaining the number of friction pairs included in the clutch assembly and the gap between the first friction plate and the second friction plate included in each of the friction pairs, and determining the first stroke of the piston based on the gap.

[0021] In one embodiment, a position mark is provided on the outer peripheral side of the second friction plate, and the gap between the second friction plate and the first friction plate is determined according to the position mark.

[0022] In one embodiment, the weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil is obtained through an oil online monitoring module. The oil online monitoring module includes a weight sensor and a weight processor. The weight sensor is arranged on the return oil pipeline of the clutch assembly. The weight sensor is used to monitor the weight of particles in the return oil pipeline. The weight sensor sends the weight information of the particles in the return oil pipeline to the weight processor. The weight processor obtains the weight of the first friction plate and the second friction plate in the lubricating oil according to the weight information.

[0023] In a second aspect, the present application further provides a monitoring device for the life of a clutch component, the monitoring device comprising:

[0024] A monitoring module, used to monitor the status of the clutch assembly;

[0025] a stroke determination module, for determining a first stroke of a piston in a hydraulic drive assembly when the clutch assembly enters a second state from a first state, wherein if the first state is an engaged state, the second state is a disengaged state; and if the first state is a disengaged state, the second state is an engaged state;

[0026] An oil online monitoring module, used for obtaining the weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil;

[0027] a thickness ratio processing module, used to determine a wear thickness ratio between a first friction plate and a second friction plate in the clutch assembly;

[0028] a wear thickness processing module, configured to determine a first wear thickness of a wear-resistant layer on a first friction plate included in the clutch assembly based on the first stroke and a wear thickness ratio between the first friction plate and the second friction plate;

[0029] a wear degree processing module, configured to determine the wear degree of the first friction plate based on the first wear thickness;

[0030] a wear rate processing module, configured to determine a wear rate of the wear-resistant layer of the first friction plate;

[0031] The remaining service life processing module is used to determine the remaining service life of the clutch component.

[0032] In a third aspect, the present application further provides an electronic device comprising: a processor and a memory, wherein the memory is used to store programs executable by the processor, and the processor is used to read the programs in the memory and execute the steps of the method for predicting the life of a clutch component as in any one of the embodiments in the first aspect.

[0033] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer executes the steps of the method for predicting the life of a clutch component as described in any one of the embodiments of the first aspect above.

[0034] In the fifth aspect, an embodiment of the present invention provides a vehicle, comprising an electric motor, a braking system and the monitoring device described in the embodiment of the second aspect, wherein the braking system comprises a power input assembly, the output shaft of the electric motor is transmission-connected to the power input assembly, and the monitoring device is used to monitor the life of the clutch assembly in the braking system.

[0035] For the technical effects that may be achieved by the clutch component life monitoring device disclosed in the second aspect, the electronic device disclosed in the third aspect, the computer-readable storage medium disclosed in the fourth aspect, and the vehicle disclosed in the fifth aspect, please refer to the technical effects that can be achieved by the first aspect or various possible schemes in the first aspect, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a braking system provided by an embodiment of the present invention;

[0037] Figure 2 A cross-sectional view of a brake system provided by an embodiment of the present invention;

[0038] Figure 3 A cross-sectional view of a brake assembly provided by an embodiment of the present invention;

[0039] Figure 4 A cross-sectional view of a first friction plate in a brake system provided by an embodiment of the present invention;

[0040] Figure 5 A flow chart of a clutch component life prediction method provided by an embodiment of the present invention;

[0041] Figure 6 Another flow chart of the clutch component life prediction method provided by an embodiment of the present invention;

[0042] Figure 7 A schematic diagram of the structure of a second friction plate in a clutch assembly provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the module structure of a clutch component life monitoring device provided by an embodiment of the present invention;

[0044] Fig. 9 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0045] Icons: 7-electronic device; 701-processor; 702-memory; 703-bus; 10-power output shaft; 20-fixed assembly; 30-clutch assembly; 31-first friction plate; 310-core plate; 311-wear-resistant layer; 312-oil groove; 32-second friction plate; 40-brake assembly; 41-connecting part; 42-brake plate; 420-main board; 421-second brake pad; 43-first brake pad; 44-transmission structure; 440-first gear; 441-transmission shaft; 442-second gear; 50-hydraulic drive assembly; 51-piston; 52-brake pin; 53-reset spring; 60-power input assembly; 70-first torque sensor; 80-deep groove ball bearing. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Figure 1 A schematic diagram of the structure of the braking system provided in an embodiment of the present application, Figure 2 A cross-sectional view of a braking system provided in an embodiment of the present application. Figure 1 and Figure 2The braking system includes a fixed component 20, a power input component 60, a power output shaft 10, a hydraulic drive component 50, a clutch component 30, a brake component 40 and a first torque sensor 70, wherein the power output shaft 10 is used to connect with the gearbox, the fixed component 20, the hydraulic drive component 50 and the brake component 40 are all arranged on the power output shaft 10, the power input component 60 is arranged at one end of the power output shaft 10, and a deep groove ball bearing 80 is arranged between the power input component 60 and the power output shaft 10 so that the power of the power input component 60 will not be directly transmitted to the power output shaft 10, part of the fixed component 20 is located between the brake component 40 and the power input component 60, the fixed component 20 is fixedly connected to the power output shaft 10, and the clutch component 30 is arranged between the fixed component 20 and the power input component 60. The hydraulic drive component 50 can drive the clutch component 30 to switch between an engaged state and a disengaged state. When the clutch component 30 is in the engaged state, the fixed component 20 and the power input component 60 are connected through the clutch component 30. The hydraulic drive component 50 can also drive the brake component 40 to switch between a braking state and an initial state. The first torque sensor 70 is used to detect when the clutch component 30 enters a disengaged state from an engaged state and the brake component 40 enters a braking state from an initial state, the friction torque of the brake component 40, and the belt torque of the clutch component 30.

[0048] The clutch assembly 30 includes a plurality of first friction plates 31 and a plurality of second friction plates 32. The plurality of first friction plates 31 are sleeved on the power input assembly 60, and the plurality of second friction plates 32 are arranged on the fixed assembly 20. The plurality of first friction plates 31 and the plurality of second friction plates 32 are arranged alternately along the axial direction of the power output shaft 10. Lubricating oil exists between the first friction plates 31 and the second friction plates 32. When the clutch assembly 30 enters the disengaged state from the engaged state, the shearing action of the lubricating oil in the clutch assembly 30 generates a belt torque. When the clutch assembly 30 enters the engaged state from the disengaged state, the lubricating oil can take away the heat generated by the friction between the first friction plates 31 and the second friction plates 32, so as to prevent the heat between the first friction plates 31 and the second friction plates 32 from being too high and damaging the seal of the clutch assembly 30.

[0049] Figure 3 A cross-sectional view of a brake assembly provided by an embodiment of the present invention. Figure 1 , Figure 2 and Figure 3The brake assembly 40 includes a connecting portion 41, a brake plate 42 and a plurality of first brake pads 43, wherein the plurality of first brake pads 43 are sleeved on the power output shaft 10, and the plurality of first brake pads 43 are arranged at intervals along the axial direction of the power output shaft 10. The brake plate 42 includes a main board 420 and at least one second brake pad 421, wherein at least one second brake pad 421 is arranged on the inner side of the main board 420, and the connecting portion 41 is arranged on the outer side of the main board 420. The connecting portion 41 is used for transmission connection with the generator, and along the axial direction of the power output shaft 10, first brake pads 43 are arranged on both sides of each second brake pad 421.

[0050] In the process of the clutch assembly 30 entering the disengaged state from the engaged state and the brake assembly 40 entering the braking state from the initial state, the gearbox and other devices connected to the power output shaft 10 have a large rotational kinetic energy, and the power output shaft 10 will drive the first brake pad 43 included in the brake assembly to rotate, so that the first brake pad 43 and the second brake pad 421 generate relative rotation. During the relative rotation between the first brake pad 43 and the second brake pad 421, the value detected by the first torque sensor 70 is the friction torque. When the first brake pad 43 and the second brake pad 421 move synchronously, the value detected by the first torque sensor 70 is the belt torque. According to the belt torque and friction torque detected by the first torque sensor 70, the magnitude of the belt torque and friction torque is judged to determine the braking performance of the brake assembly 40, so as to avoid the poor effect of the brake assembly 40, which leads to the continuous rotation of the gearbox and other devices connected to the power output shaft 10, causing safety hazards.

[0051] In the above embodiment, the hydraulic drive assembly 50 includes a piston 51, a brake pin 52 and at least one return spring 53, one end of the brake pin 52 is fixed to the piston 51, the other end of the brake pin 52 extends to the side where the brake assembly 40 is located, the piston 51 is sleeved on the power output shaft 10, the piston 51 is located between the clutch assembly 30 and the brake assembly 40, the piston 51 can move along the axial direction of the power output shaft 10 under the drive of the hydraulic oil, one end of the return spring 53 is arranged on the side of the piston 51 away from the brake assembly, and the other end of the return spring 53 is arranged on the side of the power output shaft 10 close to the power input assembly 60. Specifically, when the clutch assembly 30 enters the engagement state from the disengaged state, the piston 51 moves to the side of the second friction plate 32 under the drive of the hydraulic oil to drive the friction between the second friction plate 32 and the first friction plate 31, and then the kinetic energy of the power input assembly 60 is output to the power output shaft 10 through the clutch assembly 30. When the piston 51 moves toward one side of the second friction plate 32 driven by the hydraulic oil, at least one return spring 53 contracts due to the pressure of the piston 51. When the clutch assembly 30 enters the disengaged state from the engaged state, the hydraulic oil pressure on the piston 51 disappears. During the resetting process, the return spring 53 can drive the piston 51 and the brake pin 52 arranged on the piston 51 to move. The brake pin 52 passes through the fixing assembly 20 and contacts the first brake pad 43 included in the brake assembly 40 to achieve braking of the brake assembly 40.

[0052] The connecting portion 41 may be a gear ring, a sprocket or a pulley, etc. When the connecting portion 41 is a gear ring, the connecting portion 41 and the generator may be connected in transmission through a transmission structure 44. The transmission structure 44 includes a first gear 440, a transmission shaft 441 and a second gear 442. The transmission shaft 441 connects the first gear 440 and the second gear 442 in transmission. The first gear 440 is meshed with the gear ring, and the second gear 442 is used for transmission connection with the input end of the generator. When the brake assembly 40 is in a braking state, the main board 420 will rotate, thereby driving the gear ring fixed to the outside of the main board 420 to rotate. The rotation of the gear ring can drive the first gear 440 meshed with the gear ring. The first gear 440 drives the second gear 442 to rotate through the transmission shaft 441, thereby transferring kinetic energy to the generator to achieve kinetic energy recovery.

[0053] In the above embodiments, the first torque sensor 70 can be arranged on the connecting part 41, the brake plate 42 or the transmission structure 44. More specifically, the first torque sensor can be arranged on any one of the connecting part 41, the brake plate 42, the first gear 440 or the transmission shaft 441.

[0054] Figure 4 This is a cross-sectional view of a first friction plate in a brake system according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 4In the above embodiment, the first friction plate 31 includes a core plate 310 and a plurality of wear-resistant layers 311 disposed on both sides of the core plate 310. The wear-resistant layers 311 on both sides of the core plate 310 are symmetrically disposed, and the plurality of wear-resistant layers 311 on each side are arranged at intervals along the axial direction perpendicular to the power output shaft 10, and the gap between two adjacent wear-resistant layers 311 forms an oil groove 312. The oil groove 312 is used to fill the lubricating oil, which can take away the heat generated between the wear-resistant layer 311 and the second friction plate 32, that is, the lubricating oil can take away the heat generated between the first friction plate 31 and the second friction plate 32, and the depth of the oil groove 312 needs to be within a set range to ensure that there is enough lubricating oil in the oil groove.

[0055] Along the axial direction of the power output shaft 10, the second friction plate 32 located on the side away from the brake assembly 40 is a fixed friction plate, which is fixedly connected to the fixed assembly 20. The remaining second friction plates 32 are also arranged on the fixed assembly 20, and the remaining second friction plates 32 are displaced between the fixed friction plates and the hydraulic drive assembly 50, and can also move relative to the fixed assembly 20 along the axial direction of the power output shaft 10.

[0056] Each second friction plate 32 and its adjacent first friction plate 31 can form a friction pair. It can be understood that along the axial direction of the power output shaft 10, two friction pairs are formed between the first friction plate 31 and the two second friction plates 32 on both sides thereof, and when the clutch assembly is in the disengaged state, there is a gap between each second friction plate 32 and its adjacent first friction plate 31. The change in the gap between the second friction plate 32 and the adjacent first friction plate 31 can affect the performance of the clutch assembly 30. Therefore, monitoring the clutch assembly 30 is crucial to the braking system. The following is a detailed introduction to the method for monitoring the performance of the clutch assembly 30:

[0057] Figure 5 This is a flow chart of the clutch component life prediction method provided in the embodiment of the present application. Figure 5 , the prediction methods for clutch component life include:

[0058] S10: monitoring the status of the clutch assembly;

[0059] S20: determining a first stroke of a piston in a hydraulic drive assembly when the clutch assembly enters a second state from a first state, wherein if the first state is an engaged state, the second state is a disengaged state; if the first state is a disengaged state, the second state is an engaged state;

[0060] S30: Obtaining the weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil;

[0061] S40: determining a wear thickness ratio between a first friction plate and a second friction plate in a clutch assembly;

[0062] S50: determining a first wear thickness of a wear-resistant layer on a first friction plate included in the clutch assembly based on the first stroke and a wear thickness ratio between the first friction plate and the second friction plate;

[0063] S60: determining a wear degree of the first friction plate based on the first wear thickness;

[0064] S70: Determine the wear rate of the wear-resistant layer of the first friction plate;

[0065] S80: Determine the remaining service life of the clutch component.

[0066] Based on this method, the user can determine whether the remaining thickness of the wear-resistant layer on the first friction plate 31 reaches the minimum value of the wear-resistant layer according to the wear degree of the first friction plate 31, and then determine the use degree of the clutch assembly to prevent the first friction plate 31 from being overheated and ablated or deformed, and can also determine whether the first friction plate 31 needs to be replaced. In addition, when monitoring the wear thickness ratio between the first friction plate 31 and the second friction plate 32, the weight of the first friction plate 31 and the second friction plate 32 dissolved in the lubricating oil is calculated as the basis, which can also improve the accuracy of the wear thickness ratio between the first friction plate 31 and the second friction plate 32. In addition, the wear rate of the first friction plate 31 and the remaining service life of the clutch assembly can also be obtained in this method, so that the user can replace the friction plate in advance to ensure the safety of using the clutch assembly.

[0067] More specifically, step S60: determining the degree of wear of the first friction plate based on the first wear thickness may also include: S61: judging the remaining depth of the oil groove on the first friction plate according to the first wear thickness of the wear-resistant layer, and comparing the remaining depth of the oil groove with the set depth of the oil groove. The set depth of the oil groove is the minimum depth of the oil groove. When the remaining depth of the oil groove on the first friction plate is less than the minimum depth of the oil groove, the total amount of lubricating oil in the clutch assembly is small, and the heat generated between the first friction plate and the second friction plate cannot be quickly taken away by the lubricating oil, thereby causing the first friction plate and the second friction plate to be overheated, ablated or deformed. When the remaining depth of the oil groove on the first friction plate is greater than the minimum depth of the oil groove, the lubricating oil in the clutch assembly can take away the heat generated between the first friction plate and the second friction plate, thereby ensuring the sealing of the clutch assembly.

[0068] Figure 6 Another flow chart of the clutch component life prediction method provided by the embodiment of the present invention. Figure 5 and Figure 6 In the above embodiment, step S50: determining the first wear thickness of the wear-resistant layer on the first friction plate included in the clutch assembly based on the first stroke and the wear thickness ratio between the first friction plate and the second friction plate comprises:

[0069] S51: determining a first total wear thickness of a friction pair included in the clutch assembly according to a difference between the first stroke and the specific stroke;

[0070] S52: confirming the wear thickness of each friction pair according to the first total wear thickness;

[0071] S53: Determine the first wear thickness of the wear-resistant layer on the first friction plate included in the friction pair according to the wear thickness of each friction pair.

[0072] Wherein, in the above-mentioned embodiment, the step of determining the first stroke of the piston in the hydraulic drive assembly when the clutch assembly enters the second state from the first state includes: S21: obtaining the number of friction pairs included in the clutch assembly, and the gap between the first friction plate and the second friction plate included in each of the friction pairs, and determining the first stroke of the piston according to the gap. More specifically, the number of friction pairs included in the clutch assembly can be z, the gap between the second friction plate and the first friction plate adjacent thereto is δ, and the first stroke a=zδ. δ As the number of frictions between the first friction plate and the second friction plate increases, the gap δ between the first friction plate and the second friction plate will continue to increase, which will result in different strokes of the piston in the same time period.

[0073] Figure 7 This is a schematic diagram of the structure of the second friction plate 32 in the clutch assembly provided in the embodiment of the present application, referring to Figure 7 In order to detect the gap between the second friction plate 32 and the adjacent first friction plate 31 (actually the gap between the wear-resistant layer and the second friction plate 32), a mark can be set on the edge of the second friction plate 32. When the clutch assembly enters the engaged state from the disengaged state, or enters the disengaged state from the engaged state, the change in the gap between the second friction plate 32 and the adjacent first friction plate 31 can be determined based on the distance moved by the mark position X on the second friction plate 32. The wear degree of the first friction plate 31 and the second friction plate 32 can be preliminarily judged based on the change in the gap between the first friction plate 31 and the second friction plate 32.

[0074] The step of determining the first wear thickness of the wear-resistant layer on the first friction plate 31 included in the clutch assembly based on the first stroke may also include: obtaining the wear thickness ratio between the second friction plate 32 and the first friction plate 31 included in the friction pair. After the thickness ratio between the second friction plate 32 and the first friction plate 31 is confirmed, the wear thickness of the second friction plate 32 and the first friction plate 31 can be confirmed according to the wear thickness of each friction pair, and then the first wear thickness of the wear-resistant layer on the first friction plate 31 is determined. It can be understood as S33: the step of confirming the first wear thickness of the wear-resistant layer on the first friction plate 31 included in the friction pair according to the wear thickness of each friction pair includes: obtaining the wear thickness ratio between the second friction plate 32 and the first friction plate 31 included in the friction pair.

[0075] The step of obtaining the wear thickness ratio between the second friction plate 32 and the first friction plate 31 in the clutch assembly further includes: obtaining the effective friction area of ​​a single surface of the second friction plate 32 and the effective friction area of ​​a single surface of the first friction plate 31 .

[0076] In the above-mentioned embodiment, the weight of the first friction plate 31 and the second friction plate 32 in the clutch assembly dissolved in the lubricating oil is obtained through the oil online monitoring module. The oil online monitoring module includes a weight sensor and a weight processor. The weight sensor is arranged on the oil return line of the clutch assembly. The weight sensor is used to monitor the weight of particles in the oil return line. The weight sensor sends the weight information of the particles in the oil return line to the weight processor, and the weight processor obtains the weight of the first friction plate and the second friction plate in the lubricating oil according to the weight information. Specifically, the material used for the wear-resistant layer of the first friction plate 31 is set to M, and the material used for the second friction plate 32 is set to W. When friction occurs between the first friction plate 31 and the second friction plate 32, the total weight m of the particles of the M material dissolved in the lubricating oil by the first friction plate 31 is M The total weight m of the W material particles in the second friction plate 32 incorporated into the lubricating oil w Other particles will also be incorporated into the lubricating oil. The weight sensor can send the total weight of the M material particles, the total weight of the W material particles, and the weight information of other particles to the weight processor. The weight processor can obtain the total weight m of the M material particles from the total weight of the M material particles, the total weight of the W material particles, and the weight information of other particles. M and the total weight of W material particles m W , and the density of the material M used for the wear-resistant layer of the first friction plate 31 is known to be ρ M The density of the material W used for the second friction plate 32 is known to be ρ W , the effective friction area of ​​one side of the first friction plate 31 is set to S M The effective friction area of ​​the second friction plate 32 on one side is S W The total thickness of the wear-resistant layer on one side of the first friction plate 31 is HM =m M / (ρ M *S M ), the total thickness of the second friction plate 32 worn on one side is H W =m W / (ρ W *S W ), the ratio of the thickness of the wear-resistant layer of the first friction plate 31 worn on one side to the thickness of the wear-resistant layer of the second friction plate 32 worn on one side is H M / H W =m M *ρ W *S W / m W *ρ M *S M .

[0077] The thickness ratio of the first friction plate 31 and the second friction plate 32 obtained by directly monitoring the weight of the first friction plate 31 and the second friction plate 32 in the lubricating oil is more accurate, so that the remaining service life and the wear rate are more accurate.

[0078] If the first stroke a is the stroke a1 of the piston at the first moment t1, then a1=zδ; the specific stroke is the initial stroke a0 of the piston, and the initial stroke a0 can be understood as the stroke when the second friction plate 32 and the first friction plate 31 are not rubbing against each other, when the piston drives the clutch assembly 30 to enter the engaged state. Then the first total wear thickness H of the friction pair in the clutch assembly during the time period 0-t1 is MW1 =a1-a0, wear thickness of each friction pair h MW1 =(a1-a0) / z. At this time, the thickness of the wear-resistant layer on the first friction plate is:

[0079]

[0080] If the first stroke a is the stroke a2 of the piston at the second moment t2, the specific stroke is the initial stroke a0 of the piston, and the initial stroke a0 can be understood as the stroke when the second friction plate 32 and the first friction plate 31 are not rubbing against each other, when the piston drives the clutch assembly 30 to enter the engaged state.

[0081] H MW2 = the first total wear thickness of a2-a0, the wear thickness of each friction pair h MW1 =(a2-a0) / z. At this time, the thickness of the wear-resistant layer on the first friction plate 31 is:

[0082]

[0083] If the first stroke a is the stroke a2 of the piston at the second moment t2, and the specific stroke is the stroke a1 of the piston at the first moment t1, the wear thickness of each friction pair is h MW2 =(a2-a1) / z. At this time, the thickness of the wear-resistant layer on the first friction plate 31 is:

[0084]

[0085] In some embodiments, the first stroke a is the stroke a2 of the piston at the second moment t2, and the specific stroke is the stroke a1 of the piston at the first moment t1. Then, the wear rate of the wear-resistant layer of the first friction plate 31 during the time period t1-t2 is:

[0086]

[0087] In determining the wear rate V of the wear-resistant layer of the first friction plate 31 M2 Afterwards, the remaining service life of the clutch assembly 30 can also be determined. Specifically, at time t2, the remaining wearable thickness of the wear-resistant layer of the first friction plate 31 is:

[0088]

[0089] Wherein: L is the total thickness of the wear-resistant layer on one side of the first friction plate 31, which can also be understood as the depth of the oil groove on one side of the first friction plate 31, a min It is the minimum thickness of the wear-resistant layer on one side of the first friction plate 31 , and can also be understood as the minimum depth of the oil groove on one side of the first friction plate 31 .

[0090] According to the wear rate of the wear-resistant layer on the first friction plate 31 and the remaining wearable thickness of the wear-resistant layer of the first friction plate 31 at time t2, the remaining service life of the first friction plate 31 can be determined, that is, the remaining service life of the clutch assembly 30 can be determined. Remaining service life of the clutch assembly 30:

[0091] T2=H L2 / V M2 ;

[0092] By predicting the remaining service life of the first friction plate 31 in the clutch assembly 30, the staff can replace the first friction plate 31 and the second friction plate 32 in the clutch assembly 30 in a timely manner, thereby preventing damage to the braking system due to damage to the clutch assembly 30 and reducing safety and stability issues.

[0093] Based on the same concept, an embodiment of the present invention also provides a monitoring device for a clutch assembly. Since the device is the device in the method in the embodiment of the present invention, and the principle of solving the problem by the device is similar to that of the method, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0094] like Figure 8 As shown, the above monitoring device includes the following modules:

[0095] A monitoring module, used to monitor the status of the clutch assembly;

[0096] A stroke determination module, used to determine a first stroke of a piston in a hydraulic drive assembly when the clutch assembly enters a second state from a first state, wherein if the first state is an engaged state, the second state is a disengaged state; if the first state is a disengaged state, the second state is an engaged state;

[0097] An oil online monitoring module is used to obtain the weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil;

[0098] a thickness ratio processing module, used to determine a wear thickness ratio between a first friction plate and a second friction plate in the clutch assembly;

[0099] a wear thickness processing module, configured to determine a first wear thickness of a wear-resistant layer on a first friction plate included in the clutch assembly based on a first stroke and a wear thickness ratio between the first friction plate and the second friction plate;

[0100] a wear degree processing module, configured to determine the wear degree of the first friction plate based on the first wear thickness;

[0101] a wear rate processing module, configured to determine a wear rate of the wear-resistant layer of the first friction plate;

[0102] The remaining service life processing module is used to determine the remaining service life of the clutch component.

[0103] An embodiment of the present invention further provides an electronic device. The electronic device may be a server, or a terminal such as a mobile terminal or a computer. Exemplarily, the electronic device may be a vehicle-mounted control device.

[0104] The electronic device at least includes a memory for storing data and a processor for data processing. Among them, for the processor for data processing, when executing the processing, it can be implemented by MCU (English: Microcontroller Unit, Chinese: Micro Control Unit), CPU (English: Central Processing Unit, Chinese: Central Processing Unit), DSP (English: Digital Signal Processor, Chinese: Digital Signal Processor), FPGA (English: Field Programmable Gate Array, Chinese: Field Programmable Gate Array), etc. For the memory, the memory stores an operation instruction, which can be a computer executable code, and each step in the process of the prediction method of the above-mentioned embodiment of the present invention is implemented by the operation instruction.

[0105] Fig. 9 FIG. 1 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 7 As shown, in the embodiment of the present invention, the electronic device 7 includes: a processor 701, a memory 702 and a bus 703; the processor 701 and the memory 702 are connected via the bus 703, and the bus 703 is used to transmit data between the processor 701 and the memory 702.

[0106] The memory 702 can be used to store software programs and modules, such as program instructions / modules corresponding to the monitoring method in the embodiment of the present invention. The processor 701 executes various functional applications and data processing of the electronic device 7, such as the monitoring method provided in the embodiment of the present invention, by running the software programs and modules stored in the memory 702. The memory 702 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application application, etc.; the data storage area can store data created according to the use of the electronic device 7 (such as reference image set and other related data), etc. In addition, the memory 702 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0107] The processor 701 is the control center of the electronic device 7, and uses the bus 703 and various interfaces and lines to connect various parts of the entire electronic device 7, and executes various functions of the electronic device 7 and processes data by running or executing software programs and / or modules stored in the memory 702, and calling data stored in the memory 702. Optionally, the processor 701 may include one or more processing units, such as a CPU, a digital processing unit, etc.

[0108] The embodiment of the present invention also provides a computing device readable storage medium for the clutch component life prediction method, that is, the content is not lost after power failure. The storage medium stores a software program, including program code, and when the program code is run on the computing device, the software program can implement any of the clutch component life prediction methods provided by the embodiment of the present invention when read and executed by one or more processors.

[0109] The present invention also provides a vehicle, which includes an electric motor, a braking system and the monitoring device described in the above embodiment, wherein the braking system includes a power input assembly, the output shaft of the electric motor is transmission-connected to the power input assembly, and the monitoring device is used to monitor the life of the clutch assembly in the braking system.

[0110] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for predicting the life of a clutch component, characterized in that: include: Monitor the status of clutch components; Determine a first stroke of a piston in a hydraulic drive assembly of the clutch assembly from a first state to a second state, wherein if the first state is an engaged state, the second state is a disengaged state; if the first state is a disengaged state, the second state is an engaged state; Obtaining the weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil; determining a wear thickness ratio between a first friction plate and a second friction plate in the clutch assembly; determining a first wear thickness of a wear-resistant layer on a first friction plate included in the clutch assembly based on the first stroke and a wear thickness ratio between the first friction plate and the second friction plate; determining a degree of wear of the first friction plate based on the first wear thickness; determining a wear rate of the wear-resistant layer of the first friction plate; A remaining useful life of the clutch assembly is determined.

2. The method for predicting the life of a clutch component according to claim 1, characterized in that The determining of the first wear thickness of the wear-resistant layer on the first friction plate included in the clutch assembly based on the first stroke and the wear thickness ratio between the first friction plate and the second friction plate comprises: determining a first total wear thickness of a friction pair included in the clutch assembly according to a difference between the first stroke and the specific stroke; confirming the wear thickness of each friction pair according to the first total wear thickness; The first wear thickness of the wear-resistant layer on the first friction plate included in the friction pair is determined according to the wear thickness of each of the friction pairs.

3. The method for predicting the life of a clutch component according to claim 2, characterized in that The step of determining the wear thickness ratio between the first friction plate and the second friction plate in the clutch assembly comprises: The effective friction area of ​​the second friction plate on one side and the effective friction area of ​​the first friction plate on one side are obtained, wherein: The total weight m of the M material particles in the first friction plate incorporated into the lubricating oil M The total weight of the W material particles in the second friction plate integrated into the lubricating oil is m W , the density of the material M used for the wear-resistant layer of the first friction plate is ρ M , the density of the material W used for the second friction plate is ρ W , the effective friction area of ​​the first friction plate on one side is S M , the effective friction area of ​​the second friction plate on one side is S W ; The total thickness of the wear-resistant layer on one side of the first friction plate is H M =m M / (ρ M *S M ); The total thickness of the second friction plate worn on one side is H W =m W / (ρ W *S W ); The ratio of the wear thickness of the first friction plate wear layer to the wear thickness of the second friction plate wear layer is H. M / H W =m M *ρ W *S W / m W *ρ M *S M .

4. The method for predicting the life of a clutch component according to claim 3, characterized in that If the first stroke is the stroke a1 of the piston at the first time t1, then the specific stroke is the initial stroke a0 of the piston, and the first total wear thickness H of the friction pair in the time period 0-t1 is MW1 =a1-a0 ， The wear thickness of each friction pair is h MW1 =(a1-a0) / z, the first wear thickness of the wear-resistant layer on the first friction plate is:

5. The method for predicting the life of a clutch component according to claim 4, characterized in that , if the first stroke a is the stroke a2 of the piston at the second moment t2, the specific stroke is the stroke a1 of the piston at the first moment t1, wherein the second moment is greater than the first moment; the wear thickness h of each friction pair MW2 =(a2-a1) / z, the first wear thickness of the wear-resistant layer on the first friction plate is:

6. The method for predicting the life of a clutch component according to claim 1, characterized in that: The determining the wear degree of the first friction plate based on the first wear thickness includes: The remaining depth of the oil groove on the first friction plate is determined according to the first wear thickness of the wear-resistant layer, and the remaining depth of the oil groove is compared with the set depth of the oil groove.

7. The method for predicting the life of a clutch component according to claim 1, characterized in that: The step of determining a first stroke of a piston in a hydraulic drive assembly when the clutch assembly enters a second state from a first state comprises: The number of friction pairs included in the clutch assembly and the gap between a first friction plate and a second friction plate included in each friction pair are obtained, and the first stroke of the piston is determined according to the gap.

8. The method for predicting the life of a clutch component according to claim 7, characterized in that: A position mark is provided on the outer peripheral side of the second friction plate, and a gap between the second friction plate and the first friction plate is determined according to the position mark.

9. The method for predicting the life of a clutch component according to claim 1, characterized in that: The weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil is obtained through an oil online monitoring module. The oil online monitoring module includes a weight sensor and a weight processor. The weight sensor is arranged on the return oil pipeline of the clutch assembly. The weight sensor is used to monitor the weight of particles in the return oil pipeline. The weight sensor sends the weight information of the particles in the return oil pipeline to the weight processor. The weight processor obtains the weight of the first friction plate and the second friction plate in the lubricating oil according to the weight information.

10. A clutch component life monitoring device, characterized in that: include: A monitoring module, used to monitor the status of the clutch assembly; a stroke determination module, for determining a first stroke of a piston in a hydraulic drive assembly when the clutch assembly enters a second state from a first state, wherein if the first state is an engaged state, the second state is a disengaged state; and if the first state is a disengaged state, the second state is an engaged state; An oil online monitoring module, used for obtaining the weight of the first friction plate and the second friction plate in the clutch assembly dissolved in the lubricating oil; a thickness ratio processing module, used to determine a wear thickness ratio between a first friction plate and a second friction plate in the clutch assembly; a wear thickness processing module, configured to determine a first wear thickness of a wear-resistant layer on a first friction plate included in the clutch assembly based on the first stroke and a wear thickness ratio between the first friction plate and the second friction plate; a wear degree processing module, configured to determine the wear degree of the first friction plate based on the first wear thickness; a wear rate processing module, configured to determine a wear rate of the wear-resistant layer of the first friction plate; The remaining service life processing module is used to determine the remaining service life of the clutch component.

11. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory is used to store a program executable by the processor, and the processor is used to read the program in the memory and execute the steps of the method for predicting the life of a clutch component according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that: include: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is enabled to execute the steps of the method for predicting the life of a clutch component according to any one of claims 1 to 9.

13. A vehicle, characterized in that: It comprises an electric motor, a braking system and a monitoring device for the life of a clutch assembly as claimed in claim 10, wherein the braking system comprises a power input assembly, the output shaft of the electric motor is drivingly connected to the power input assembly, and the monitoring device is used to monitor the clutch assembly in the braking system.

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