Life management system

Abstract

To provide a life management system capable of accurately determining the life of a component of a working machine operating in conjunction with the rotation of a drive source without providing a new sensor.SOLUTION: A life management system is a system for managing a life of a component of a work machine that operates in conjunction with rotation of a drive source, and includes a memory that stores a predetermined threshold in association with the component, and a processor that determines the life of the component based on the threshold stored in the memory. The processor integrates the workload of the drive source, determines whether the integrated workload has reached a threshold value, and notifies replacement of the component when it is determined that the workload has reached the threshold value.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a lifespan management system for managing the lifespan of components of a work machine. [Background technology]

[0002] If a work machine continues to be used without maintenance, damage may occur due to deterioration of the components over time. Repairing this damage may require the replacement of many parts, and may require significant repair costs and time. For this reason, it is very important to know when maintenance is due for the work machine.

[0003] Therefore, for example, Patent Document 1 discloses an information management device that calculates the lifespan of a hydraulic pump or hydraulic motor based on the load on the hydraulic pump or hydraulic motor that operates in conjunction with the rotation of the drive source, the temperature of the discharge pressure oil of the hydraulic pump or the working oil of the hydraulic motor, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4540695 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the information management device of Patent Document 1 presents new problems, such as the need to add a new sensor to the work machine to acquire the necessary information and the need for complex and extensive calculations.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a lifespan management system that can accurately determine the lifespan of components of a work machine that operate in conjunction with the rotation of a drive source, without providing any new sensors. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a lifespan management system that manages the lifespan of components of a work machine that operate in conjunction with the rotation of a drive source, comprising: a memory that stores predetermined thresholds associated with the components; and a processor that determines the lifespan of the components based on the thresholds stored in the memory, wherein the processor accumulates the workload of the drive source, determines whether the accumulated workload has reached the threshold, and if it determines that the workload has reached the threshold, notifies the replacement of the component. [Effects of the Invention]

[0008] According to the present invention, the lifespan of components of a work machine that operate in conjunction with the rotation of a drive source can be accurately determined without providing a new sensor. Note that problems, configurations, and effects other than those described above will become clear from the description of the following embodiments. [Brief explanation of the drawings]

[0009] [Figure 1] Conceptual diagram of a lifespan management system [Figure 2] FIG. 2 is a schematic diagram of a drive circuit of a work machine. [Figure 3] FIG. 2 is a cross-sectional view of a hydraulic pump. [Figure 4] FIG. 2 is a hardware configuration diagram of the work machine. [Figure 5] FIG. 2 is a hardware configuration diagram of a lifespan management server. [Figure 6] FIG. 2 is a functional block diagram of a lifespan management server. [Figure 7] 10 is a flowchart of a lifespan management process. [Figure 8] 10A shows an example of a table stored in a lifespan management server and an example of an integrated value of workload (B). DETAILED DESCRIPTION OF THE INVENTION

[0010] [Outline of Lifespan Management System 100] FIG. 1 is a conceptual diagram of a lifespan management system 100. The lifespan management system 100 is a system that manages the lifespans of components included in a work machine 1. As shown in FIG. 1, for example, the lifespan management system 100 mainly comprises a work machine 1 and a lifespan management server 4 that can communicate with the work machine 1 via a communication network 2. Note that the number of work machines 1 connected to the lifespan management server 4 is not limited to one, and may be multiple.

[0011] [Configuration of work machine 1] The work machine 1 according to this embodiment is a hydraulic excavator. However, specific examples of the work machine 1 are not limited to hydraulic excavators, and any work machine such as a dump truck, wheel loader, or crane is applicable. More specifically, the work machine 1 only needs to be equipped with a drive source and components that operate in conjunction with the rotation of the drive source.

[0012] Fig. 2 is a schematic diagram of a drive circuit 10 of the work machine 1. As shown in Fig. 2, the work machine 1 is equipped with a drive circuit 10. The drive circuit 10 is a circuit that generates a drive force to drive the work machine 1. The drive circuit 10 is also a circuit that operates the hydraulic cylinder 15 by circulating hydraulic oil between a hydraulic oil tank 12 and a hydraulic cylinder 15.

[0013] The drive circuit 10 mainly includes, for example, an engine 11 (drive source), a hydraulic oil tank 12, a hydraulic pump 13, a valve 14, a hydraulic cylinder 15 (hydraulic actuator), and a filter 16. Note that the type and number of hydraulic actuators mounted on the work machine 1 are not limited to the example shown in FIG.

[0014] The engine 11 is an example of a drive source that generates a rotational drive force (in other words, rotates an output shaft) for driving the work machine 1. The engine 11 is an internal combustion engine that generates a rotational drive force by burning (consuming) a fossil fuel (e.g., diesel) stored in a fuel tank (not shown). However, a specific example of the drive source is not limited to the engine 11, and may be an electric motor that consumes electric power to generate a rotational drive force.

[0015] The hydraulic oil tank 12 stores hydraulic oil to be supplied to the hydraulic cylinder 15 (in other words, to be circulated within the drive circuit 10 of the work machine 1). The hydraulic pump 13 is connected to the output shaft of the engine 11. Furthermore, the hydraulic pump 13 discharges the hydraulic oil stored in the hydraulic oil tank 12 toward the hydraulic cylinder 15 by means of the rotational driving force generated by the engine 11.

[0016] Fig. 3 is a cross-sectional view of the hydraulic pump 13. As shown in Fig. 3, the hydraulic pump 13 mainly includes a housing 21, a rotary shaft 22, bearings 23a and 23b, an oil seal 24, a swash plate 25, and a pair of pistons 26a and 26b. However, the specific configuration of the hydraulic pump 13 is not limited to the example shown in Fig. 3.

[0017] The housing 21 has an internal space that houses the components (22 to 26) of the hydraulic pump 13. The housing 21 mainly includes a through-hole 21a through which the rotary shaft 22 is inserted, an intake port 21b that draws in the hydraulic oil stored in the hydraulic oil tank 12, and a discharge port 21c that discharges the compressed hydraulic oil.

[0018] The rotating shaft 22 is inserted through the through hole 21a and rotatably supported by the housing 21 by bearings 23a and 23b. The rotating shaft 22 is also connected to the output shaft (not shown) of the engine 11 via a coupling (not shown). That is, the rotating shaft 22 rotates in conjunction with the rotation of the output shaft of the engine 11. More specifically, the rotating shaft 22 rotates integrally with the output shaft of the engine 11. The oil seal 24 is a sealing member that provides a liquid-tight seal between the through hole 21a and the rotating shaft 22.

[0019] The swash plate 25 is fixed to the rotary shaft 22 and rotates integrally with the rotary shaft 22. The inclination angle of the swash plate 25 relative to the rotary shaft 22 can be varied under the control of the controller 30. In other words, the hydraulic pump 13 is a variable displacement type.

[0020] Piston 26a is disposed in a space connected to suction port 21b. Piston 26b is disposed in a space connected to discharge port 21c. Pistons 26a and 26b are attached to swash plate 25 and reciprocate as swash plate 25 rotates. As a result, hydraulic oil drawn from hydraulic oil tank 12 through suction port 21b is compressed and discharged through discharge port 21c. The flow rate of hydraulic oil discharged per one rotation of swash plate 25 is adjusted by the inclination angle of swash plate 25.

[0021] The valve 14 controls the supply and discharge direction of hydraulic oil to and from the hydraulic cylinder 15 under the control of a controller 30 (see FIG. 4), which will be described later. The hydraulic cylinder 15 expands and contracts (operates) when hydraulic oil is supplied to one of the bottom chamber and the rod chamber and discharged from the other. The filter 16 filters (removes dust contained in) the hydraulic oil that is discharged from the hydraulic cylinder 15 and returned to the hydraulic oil tank 12 via the valve 14.

[0022] Here, "components of the work machine that operate in conjunction with the rotation of the drive source" include, for example, components of the hydraulic pump 13 that discharges hydraulic oil in response to the rotation of the drive source (e.g., bearings 23a, 23b, oil seal 24), the filter 16 that filters the hydraulic oil discharged by the hydraulic pump 13, or the hydraulic oil discharged by the hydraulic pump 13.

[0023] The rotational driving force generated by the engine 11 acts directly on the hydraulic pump 13. Therefore, deterioration of the components of the hydraulic pump 13 (e.g., bearings 23a, 23b, oil seal 24) progresses in proportion to the workload of the engine 11 (described later). In addition, the filter 16 filters the hydraulic oil discharged from the hydraulic pump 13 and returns it to the hydraulic oil tank 12, so clogging progresses in proportion to the workload of the engine 11. Furthermore, the hydraulic oil discharged from the hydraulic pump 13 is transmitted to the hydraulic cylinder 15 as pressure and flow rate, and is ultimately dissipated as heat. During this series of transmission processes, chemical changes such as oxidation and consumption of additives occur, causing deterioration. Therefore, these components are particularly suitable for determining their lifespans using the lifespan management process according to this embodiment.

[0024] Furthermore, the "component of the work machine that operates in conjunction with the rotation of the drive source" may also include parts of the hydraulic circuit through which the hydraulic oil discharged by the hydraulic pump 13 passes (for example, the valve 14 and a relief valve (not shown)). These components are not necessarily in operation all the time while the engine 11 is rotating, so the accuracy of determining their lifespan is lower than for the components described above. However, because a positive correlation is recognized between an increase in the workload of the engine 11 and its lifespan, there is room for applying the lifespan management process according to this embodiment.

[0025] FIG. 4 is a hardware configuration diagram of the work machine 1. The work machine 1 is equipped with a controller 30. The controller 30 is equipped with a CPU (Central Processing Unit) 31, which is an example of a processor, and a memory 32. The memory 32 is configured, for example, from a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), or a combination of these. The controller 30 realizes the processing described below by having the CPU 31 read and execute program code stored in the ROM or HDD. The RAM is used as a work area when the CPU 31 executes the program.

[0026] However, the specific configuration of the controller 30 is not limited to this, and may be realized by hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

[0027] The work machine 1 also includes a fuel gauge 33, an operating device 34, and a communication I / F (Interface) 35.

[0028] The fuel gauge 33 detects the amount of fuel remaining in the fuel tank and outputs a remaining amount signal indicating the detected remaining amount to the controller 30. The controller 30 determines the difference in the remaining amount detected by the fuel gauge 33 over a predetermined time interval (for example, one hour or one day) as the fuel consumption amount [l]. Furthermore, if the fuel tank is refueled during the predetermined time interval, the controller 30 determines the fuel consumption amount taking the refueled fuel into consideration.

[0029] Furthermore, instead of using the fuel gauge 33, the controller 30 may determine the fuel consumption amount by integrating the fuel injection amount for the engine 11. In this case, the fuel consumption amount can be determined by multiplying the fuel injection amount per injection acquired from an engine controller (not shown) by the average rotation speed of the engine 11. Furthermore, when the drive source is an electric motor, the controller 30 may determine the amount of electric power supplied to the electric motor.

[0030] The operation device 34 accepts an operation from the operator to operate the work machine 1, and outputs an operation signal indicating the accepted operation to the controller 30. The work machine 1 operates when the operator operates the operation device 34. Specific examples of the operation device 34 include a lever, a steering wheel, and pedals. The communication I / F 35 is a communication interface that transmits and receives data to and from an external device (e.g., lifespan management server 4) via the communication network 2 (e.g., the Internet, a mobile communication system, Wi-Fi (registered trademark)).

[0031] The controller 30 controls the overall operation of the work machine 1. As one example, the controller 30 controls the operation of the engine 11, hydraulic pump 13, and valves 14 based on operation signals output from the operating device 34. As a result, the hydraulic cylinder 15 extends and retracts in accordance with the operation of the operator. As another example, the controller 30 transmits daily report data to the life management server 4 via the communication I / F 35. The daily report data includes at least the amount of fuel consumed per day. In addition, the daily report data may include a flag indicating that a hydraulic oil change has been carried out, the operating hours of the work machine 1, etc. However, the controller 30 is not limited to daily report data, and may transmit status data indicating the status of the work machine 1 at predetermined time intervals (for example, every hour or every day). In other words, the daily report data is one example of status data.

[0032] [Configuration of Lifespan Management Server 4] FIG. 5 is a hardware configuration diagram of the lifespan management server 4. The lifespan management server 4 manages the lifespans of the components of the work machine 1 based on daily report data acquired from the work machine 1. The lifespan management server 4 is realized by, for example, a workstation or a general-purpose computer such as a personal computer. As shown in FIG. 5, the lifespan management server 4 mainly includes a CPU 41, which is an example of a processor, a memory 42, a storage 43, an input device 44, a display 45, and a communication I / F 46. The components of the lifespan management server 4 are connected to a communication bus 47.

[0033] The CPU 41 performs the processing described below by executing a series of instructions included in the lifespan management program 48 loaded into the memory 42. The memory 42 is realized, for example, as a RAM or other volatile memory. The storage 43 is realized, for example, as a ROM, a hard disk drive, a flash memory, or other non-volatile storage device. The lifespan management program 48 is stored in the storage 43, and is loaded into the memory 42 as needed and executed by the CPU 41.

[0034] The input device 44 is an input interface, such as a keyboard or pointing device, that accepts input operations from the administrator of the lifespan management server 4. The display 45 is an output interface that outputs (displays) information to the administrator of the lifespan management server 4. The communication I / F 46 is a communication interface that transmits and receives data to and from an external device (for example, the work machine 1) via a communication network.

[0035] [Function block diagram of lifespan management server 4] Fig. 6 is a functional block diagram of the lifespan management server 4. As shown in Fig. 6, the lifespan management server 4 includes, for example, an accumulating unit 51, a determining unit 52, an estimating unit 53, and a notifying unit 54. The accumulating unit 51, the determining unit 52, the estimating unit 53, and the notifying unit 54 are realized, for example, by the CPU 41 reading and executing the lifespan management program 48. Also, some of the functional blocks (51 to 54) shown in Fig. 6 can be omitted.

[0036] The integration unit 51 integrates the workload E of the engine 11 based on the daily report data acquired from the work machine 1. For example, if the calorific value of diesel is 43 [MJ / kg], the thermal conversion efficiency of the engine 11 is 40 [%], and the density of diesel is 0.8 [g / cm 3 ], and 1 [kWh] = 3.6 [MJ / kg], then the workload E of the engine 11 per liter of diesel is 3.8 [kWh] (= 43 × 0.4 / 3.6 / 1.25). That is, the integrating unit 51 calculates the workload E of the engine 11 per day based on the daily report data, as shown by the bar graph in FIG. 8(B). Furthermore, the integrating unit 51 integrates the workload E calculated based on the daily report data, as shown by the plot "●" in FIG. 8(B).

[0037] Furthermore, as shown in FIG. 8(A), the integrating unit 51 stores the workloads E1 to E4 in the memory 42 (or storage 43) in association with each of the components of the work machine 1. Furthermore, when a component (for example, hydraulic oil) is replaced in the work machine 1, the integrating unit 51 resets the corresponding workload E1 (to 0). That is, although the workloads E1 to E4 in FIG. 8(A) are the sum of the same workload E calculated from the daily report data for that day, the reset timings are different, so there is a possibility that the values ​​will be different from one another.

[0038] The determination unit 52 determines whether the integrated workloads E1 to E4 have reached the corresponding thresholds TH1 to TH4. The thresholds TH1 to TH4 indicate the workloads [kWh] of the engine 11 until the corresponding components reach the end of their lifespans. The thresholds TH1 to TH4 may also be set to values ​​smaller than the actual lifespans of the corresponding components (i.e., values ​​including a margin). The thresholds TH1 to TH4 are associated with the components and stored in advance in the memory 42 (or storage 43). The thresholds TH1 to TH4 are determined in advance by experiment or simulation, and the method for doing so is not particularly limited, but the following method may be considered, for example.

[0039] As an example, hydraulic fluids are subject to lifespan assessments specified in JCMAS P 045 Hydraulic Fluids for Construction Machinery - High-Pressure Piston Pump Test. This is a test that accelerates deterioration by performing work on the hydraulic fluid, and a lifespan threshold is set for each manufacturer's product as the lifespan of the hydraulic fluid, and the test evaluates how many hours the fluid lasts over the test period. For example, the test results can be converted into the amount of work input per unit amount and used as the threshold TH1.

[0040] As another example, the bearings 23a, 23b have a life rotation count (e.g., 1 million rotations) set by the manufacturer. Therefore, the amount of work done by the engine 11 required for the rotation of the bearings 23a, 23b to reach the life rotation count can be set as the threshold value TH2. In this case, a dynamic equivalent load may be used as the average load applied to the bearings 23a, 23b.

[0041] That is, a table in which identifiers of components, thresholds TH1 to TH4, and workloads E1 to E4 are associated with each other is stored in the memory 42 (or storage 43) of the lifespan management server 4, as shown in Fig. 8(A). In the table shown in Fig. 8(A), the thresholds TH1 to TH4 are predetermined fixed values, and the workloads E1 to E4 are variable values ​​that are updated in the lifespan management process described later with reference to Fig. 7.

[0042] The estimation unit 53 estimates the remaining time until the integrated workloads E1 to E4 reach the corresponding thresholds TH1 to TH4 (i.e., until replacement becomes necessary) based on the time change of the integrated workloads E1 to E4. The specific method for estimating the remaining time is not particularly limited, but the following method may be considered, for example.

[0043] As one example, the estimation unit 53 may identify the day (X day) on which an approximate straight line of the plot of the integrated value of the workload E1 for each day (days 1 to 4 in FIG. 8(B)) reaches a threshold value TH1, and estimate the remaining time (X-4). The approximate straight line can be determined by a well-known method, for example, the least squares method. As another example, the estimation unit 53 may identify the day (X day) on which a straight line connecting the current integrated value of the workload E1 (day 4 in FIG. 8(B)) and the origin reaches a threshold value TH1, and estimate the remaining time (X-4).

[0044] When the determination unit 52 determines that the integrated workloads E1 to E4 have reached the corresponding thresholds TH1 to TH4, the notification unit 54 notifies the replacement of the corresponding component. The notification unit 54 also notifies the remaining time estimated by the estimation unit 53. The method of notification is not particularly limited, but a message indicating that it is time to replace the component may be transmitted to the work machine 1 via the communication I / F 46, or may be transmitted to a mobile terminal (not shown) of a service technician via the communication I / F 46, or may be displayed on the display 45.

[0045] [Lifespan management processing] Figure 7 is a flowchart of the lifespan management process. Figure 8 is an example of a table (A) and an integrated value (B) of the workload E1 stored in the lifespan management server 4. The lifespan management process is a process for managing the lifespan of the components of the work machine 1 that operate in conjunction with the rotation of the engine 11. Below, the process for managing the lifespan of the hydraulic oil will be explained, but the same process is also carried out for the other components.

[0046] First, the controller 30 collects the operating status (for example, fuel consumption, whether hydraulic oil has been changed, and operating time) of the work machine 1 while the work machine 1 is in operation. Then, when a predetermined time (for example, 5 p.m.) arrives, the controller 30 transmits daily report data indicating the collected operating status to the lifespan management server 4 via the communication I / F 35.

[0047] The integrating unit 51 then receives daily report data from the work machine 1 via the communication I / F 46 (S11). The integrating unit 51 also determines whether or not the hydraulic oil has been changed based on the received daily report data (S12). If the hydraulic oil has been changed (S12: Yes), the integrating unit 51 resets (to 0) the workload E1 shown in FIG. 8(A) (S13). On the other hand, if the hydraulic oil has not been changed (S12: No), the integrating unit 51 adds the workload E1 shown in FIG. 8(A) to the workload calculated from the daily report data received in step S11 (S14).

[0048] Next, the determination unit 52 determines whether the integrated workload E1 has reached the corresponding threshold value TH1 (S15). Then, if the determination unit 52 determines that the integrated workload E1 has reached the threshold value TH1 (S15: Yes), the notification unit 54 issues a notification of the need to change the hydraulic oil (S16). Specific methods of notification may include, for example, displaying a message on a display mounted on the work machine 1, turning on an LED lamp, displaying a message on a mobile terminal of a service technician, or displaying a message on the display 45.

[0049] On the other hand, if the determination unit 52 determines that the integrated workload E1 has not reached the threshold TH1 (S15: No), the estimation unit 53 estimates the remaining time (x-4) days until the workload E1 reaches the threshold TH1 based on the change over time of the integrated workload E1, as shown in Fig. 8(B) (S17). Then, the notification unit 54 notifies the user of the remaining time estimated by the estimation unit 53 (S18). The notification method may be the same as in step S16.

[0050] [Effects of the embodiment] According to the above embodiment, the lifespan of the components is determined based on the integrated value of the workload E of the engine 11, so that the lifespan of the components can be determined without providing a new sensor. Also, unlike the method of Patent Document 1, the load on the hydraulic pump 13 or the hydraulic actuator, the temperature of the discharge pressure oil of the hydraulic pump 13 or the working oil of the hydraulic actuator, and the like change every moment, making it difficult to obtain accurate values. On the other hand, changes in these parameters are reflected in the integrated value of the workload E of the engine 11, so that the lifespan can be accurately determined by integrating only the workload E.

[0051] Furthermore, according to the above embodiment, by notifying the user of the remaining time until the workload E reaches the threshold value TH (i.e., until replacement of a component becomes necessary), it is possible to ensure a component replacement schedule in advance. As a result, it is expected that downtime of the work machine 1 will be reduced.

[0052] Furthermore, according to the above embodiment, the work amount E of the driving source can be obtained without adding a new sensor by accumulating the work amount E based on the fuel consumption when the driving source is the engine 11, and accumulating the work amount E based on the amount of electricity supplied when the driving source is an electric motor.

[0053] Furthermore, according to the above embodiment, by performing a lifespan management process on components whose lifespan is closely related (typically proportional) to the increase in the workload of the driving source, it becomes possible to accurately determine the lifespan of the components.

[0054] Furthermore, according to the above embodiment, by having the lifespan management server 4 execute the lifespan management process, the processing load on the work machine 1 can be reduced, and the benefits of being able to increase the variety of notification destinations can also be expected.

[0055] [Other variations] The division of roles between the work machine 1 and the lifespan management server 4 is not limited to the example described above. That is, part of the processing of the lifespan management server 4 may be executed by the work machine 1. More specifically, the threshold values ​​TH1 to TH4 of Figure 8(A) may be stored in advance in the memory 32 of the work machine 1, and the CPU 31 of the work machine 1 may execute the lifespan management processing shown in Figure 7. The processing load of the lifespan management processing shown in Figure 7 is lower than that of Patent Document 1, and therefore it can be executed without problem by the CPU 31 of the work machine 1. In this case, the lifespan management server 4 may be omitted.

[0056] Furthermore, some or all of the means implemented by the lifespan management program 48 can be implemented by hardware such as an integrated circuit. Furthermore, the lifespan management program 48 may be provided by being recorded on a non-transitory recording medium that can be read by a computer. Examples of recording media include hard disks, SD cards, DVDs, and servers on the Internet.

[0057] The above-described embodiments are merely illustrative examples of the present invention, and are not intended to limit the scope of the present invention to these embodiments. Those skilled in the art can implement the present invention in various other forms without departing from the spirit of the present invention. [Explanation of symbols]

[0058] 1: Work machine 2: Communication network 4: Lifespan management server 10: Drive circuit 11: Engine 12: Hydraulic oil tank 13: Hydraulic pump 14: Valve 15: Hydraulic cylinder 16: Filter 21: Housing 21a: Through hole 21b: Inlet 21c:Discharge port 22: Rotation axis 23a, 23b: Bearings 24: Oil seal 25: Swash plate 26a, 26b: Piston 30: Controller 31,41:CPU 32,42: Memory 33:Fuel gauge 34: Operating device 35,46: Communication I / F 43: Storage 44: Input device 45: Display 47: Communication bus 48: Lifespan Management Program 51: Integration section 52: Judgment section 53: Estimation part 54: Information Department 100: Lifespan Management System

Claims

1. A lifespan management system that manages the lifespan of components of a work machine that operate in conjunction with the rotation of a drive source, a memory that stores predetermined threshold values ​​associated with the components; a processor that determines a life span of the component based on the threshold value stored in the memory; The processor: Integrating the workload of the driving source; determining whether the integrated workload has reached the threshold; A lifespan management system that notifies replacement of the component when it is determined that the workload has reached the threshold.

2. The lifespan management system according to claim 1, The processor: Based on the time change of the integrated workload, a remaining time until the workload reaches the threshold is estimated. A lifespan management system further notifying the estimated remaining time.

3. The lifespan management system according to claim 1, A lifespan management system characterized in that, when the driving source is an internal combustion engine, the processor integrates the amount of work done by the internal combustion engine based on the amount of fuel consumed by the internal combustion engine.

4. The lifespan management system according to claim 1, A lifespan management system characterized in that, when the drive source is an electric motor, the processor integrates the amount of work done by the electric motor based on the amount of electricity supplied to the electric motor.

5. The lifespan management system according to claim 1, A lifespan management system characterized in that the components include any of components of a hydraulic pump that discharges hydraulic oil by rotation of the drive source, a filter that filters the hydraulic oil discharged by the hydraulic pump, and hydraulic oil discharged by the hydraulic pump.

6. The lifespan management system according to claim 1, a work machine including the drive source and the component; a lifespan management server that includes the memory and the processor, and that acquires the workload of the drive source from the work machine via a communication network.

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