Machine oil pressure type controller monitoring device, machine oil pressure type controller monitoring system and machine oil pressure type controller monitoring method

Abstract

To determine a failure sign and a failure factor of a machine oil pressure type controller.SOLUTION: A machine oil pressure type controller monitoring device comprises: a recording part which records first measurement relation as relation between the opening of a starter device and at least one of the opening of a speed relay and oil pressure; a setting part which sets first reference relation as relation between a reference value of the opening of the starter device and a reference value of at least one of the opening of the speed relay and the oil pressure; and a determination part which determines a failure sign and a failure factor based upon a first set value for determining the relation between the opening of the starter device and the reference value of the opening of the starter device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD Embodiments of the present invention relate to a machine hydraulic control device monitoring device, a machine hydraulic control device monitoring system, and a machine hydraulic control device monitoring method. [Background technology]

[0002] A control valve used to control the flow rate and pressure of steam in a steam turbine is controlled, for example, by a mechanical-hydraulic control device. The mechanical-hydraulic control device operates the control valve via a hydraulic drive unit and a drive mechanism using the opening of a speed relay as an output, thereby controlling the amount of steam supplied to the steam turbine. This mechanical-hydraulic control device can malfunction due to various factors caused by aging. If a mechanical-hydraulic control device malfunctions in a power plant, the power plant is shut down unplanned and an investigation of each part is conducted, including an overhaul and inspection of the mechanical-hydraulic control device. Depending on the location and severity of the malfunction as a result of the investigation, the power plant may be shut down for an extended period of time to perform recovery measures such as repairs and part replacement. For this reason, there is a market need to prevent unplanned shutdowns of power plants in order to maintain the plant's availability.

[0003] Therefore, there is a need for the development of technology that can determine the signs of failure and the causes of failure in a mechanical hydraulic control device before a failure actually occurs in the mechanical hydraulic control device. Such technology would enable preparations to be made for solutions to the signs of failure and the causes of failure before the power plant is shut down, thereby preventing or shortening the shutdown period of the power plant. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-131923 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention addresses these circumstances, and the problem that the present invention aims to solve is to provide a mechanical hydraulic control device monitoring device, a mechanical hydraulic control device monitoring system, and a mechanical hydraulic control device monitoring method that can monitor for signs of failure in a mechanical hydraulic control device and determine the cause of the failure. [Means for solving the problem]

[0006] In order to achieve the above object, the mechanical hydraulic control device monitoring device of this embodiment is a device that monitors a hydraulic drive device including a regulator oil cylinder pilot valve that adjusts the supply amount of control oil supplied to the hydraulic drive unit to drive the hydraulic drive unit that adjusts the valve opening of the steam valve, an auxiliary pilot valve that adjusts the supply amount of control oil supplied to the speed relay to drive the speed relay that adjusts the valve opening of the regulator oil cylinder pilot valve, a synchronizer that adjusts the flow rate of the control oil flowing through a rotary pilot valve sleeve that connects the speed relay and the auxiliary pilot valve, and a starter that adjusts the valve opening of the auxiliary pilot valve. In addition, the mechanical hydraulic control device monitoring device of this embodiment is equipped with a recording unit that records at least one of the following: a first measurement relationship which is the relationship between the opening of the starting device and at least one of the opening of the speed relay and the hydraulic pressure; a second measurement relationship which is the relationship between the opening of the synchronizer and at least one of the opening of the speed relay and the hydraulic pressure; a third measurement relationship which is the relationship between the opening of the speed relay and at least one of the opening of the hydraulic drive unit or the hydraulic pressure; a fourth measurement relationship which is the relationship between the opening of the hydraulic drive unit and the opening of the regulating valve; a fifth measurement relationship which is the relationship between the opening of the starting device and the opening of the auxiliary pilot valve; and a sixth measurement relationship which is the relationship between the opening of the speed relay and the opening of the regulating valve oil cylinder pilot valve. In addition, the mechanical hydraulic control device monitoring device of this embodiment is equipped with an alarm unit that determines a failure predictor and a failure cause in at least one of the mechanical hydraulic control device, the hydraulic drive device, and the steam valve and outputs an alarm based on at least one of: a first set value for determining the relationship between the opening of the starting device and a reference value for the opening of the starting device; a second set value for determining the relationship between the opening of the synchronizer and a reference value for the opening of the synchronizer; a third set value for determining the relationship between the opening of the speed relay and a reference value for the opening of the speed relay; a fourth set value for determining the relationship between the opening of the hydraulic drive unit and a reference value for the opening of the hydraulic drive unit; a fifth set value for determining the relationship between the opening of the auxiliary pilot valve and a reference value for the opening of the auxiliary pilot valve; and a sixth set value for determining the relationship between the opening of the regulator valve cylinder pilot valve and a reference value for the opening of the regulator valve cylinder pilot valve. [Brief explanation of the drawings]

[0007] [Figure 1]1 is a schematic configuration diagram of a machine hydraulic control device monitoring system 1 according to an embodiment of the present invention. [Figure 2] 1A and 1B are explanatory diagrams of monitoring by the mechanical hydraulic control device monitoring system 1 of this embodiment, where (a) is a graph for explaining normal operation, and (b) to (d) are graphs for explaining failures. [Figure 3] 1 is a flowchart showing a machine hydraulic control device monitoring method 100 according to the present embodiment. [Figure 4] 1A and 1B are explanatory diagrams of monitoring by the mechanical hydraulic control device monitoring system 1 of this embodiment, where (a) is a graph for explaining normal operation, and (b) to (d) are graphs for explaining failures. [Figure 5] 2 is a flowchart showing a machine hydraulic control device monitoring method 200 according to the present embodiment. [Figure 6] 1A and 1B are explanatory diagrams of monitoring by the mechanical hydraulic control device monitoring system 1 of this embodiment, where (a) is a graph for explaining normal operation, and (b) to (d) are graphs for explaining failures. [Figure 7] 3 is a flowchart showing a machine hydraulic control device monitoring method 300 according to the present embodiment. [Figure 8] 1A and 1B are explanatory diagrams of monitoring by the machine hydraulic control device monitoring system 1 of the present embodiment, where (a) is a graph for explaining normal operation, and (b) is a graph for explaining operation at the time of failure. [Figure 9] 4 is a flowchart showing a machine hydraulic control device monitoring method 400 according to the present embodiment. [Figure 10] 1A and 1B are explanatory diagrams of monitoring by the machine hydraulic control device monitoring system 1 of the present embodiment, where (a) is a graph for explaining normal operation, and (b) is a graph for explaining operation at the time of failure. [Figure 11] 5 is a flowchart showing a machine hydraulic control device monitoring method 500 according to the present embodiment. [Figure 12] 1A and 1B are explanatory diagrams of monitoring by the machine hydraulic control device monitoring system 1 of the present embodiment, where (a) is a graph for explaining normal operation, and (b) is a graph for explaining operation at the time of failure. [Figure 13] 6 is a flowchart showing a machine hydraulic control device monitoring method 600 according to the present embodiment. [Figure 14] 3 is a table summarizing the failure signs and failure factors determined by the machine hydraulic control device monitoring device 30 of this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, a mechanical hydraulic control device monitoring device, a mechanical hydraulic control device monitoring system, and a mechanical hydraulic control device monitoring method according to embodiments of the present invention will be described in detail with reference to the drawings. Note that the embodiments shown below are merely examples of embodiments of the present invention and are not intended to limit the scope of the invention. Furthermore, in the drawings referred to in the embodiments, identical parts or parts having similar functions are given the same or similar reference numerals, and their description may be omitted. Furthermore, the dimensional ratios of the drawings may differ from the actual ratios, and some components may be omitted from the drawings.

[0009] The schematic configuration of a mechanical hydraulic control device monitoring system 1 of this embodiment will be described with reference to Fig. 1. Fig. 1 is a schematic configuration diagram of the mechanical hydraulic control device monitoring system 1 of this embodiment.

[0010] The mechanical-hydraulic control device monitoring system 1 is a system that controls a fluid for a turbine. Examples of the fluid for a steam turbine here include steam used in a steam turbine and fuel gas used in a gas turbine. The mechanical-hydraulic control device monitoring system 1 includes a regulator valve 2, a hydraulic drive unit 4, a mechanical-hydraulic control device 10, and a mechanical-hydraulic control device monitoring device 30.

[0011] The control valve 2 is connected to a hydraulic drive unit 4 via a drive mechanism 3. The control valve 2 changes the amount of fluid supplied to the turbine by changing the valve opening. The valve opening is controlled by the hydraulic drive unit 4, which will be described later; for example, when the valve opening increases (is more open), the amount of fluid supplied to the turbine increases. The control valve 2 is provided with a control valve opening detector 20, which measures the opening of the control valve 2. The control valve opening detector 20 is connected to a recording unit 31 of a mechanical hydraulic control device monitoring device 30, which will be described later, and outputs the measured value of the opening of the control valve 2 to this recording unit 31.

[0012] The drive mechanism 3 is a lever link mechanism that mechanically connects the hydraulic drive unit 4 and the regulator valve 2. The drive mechanism 3 is controlled by the hydraulic drive unit 4 to change the opening of the regulator valve 2. The drive mechanism 3 is provided with a regulator valve opening detector 21 that measures the opening of the regulator valve 2. The regulator valve opening detector 21 is connected to a recording unit 31 of a mechanical hydraulic control device monitoring device 30 (described later), and outputs the measured value of the opening of the regulator valve 2 to this recording unit 31.

[0013] The hydraulic drive unit 4 is connected to a mechanical hydraulic control device 10 and is also connected to the regulating valve 2 via a drive mechanism 3. The hydraulic drive unit 4 is a device that changes the opening of the regulating valve 2 using control oil, and includes a hydraulic drive unit 5 and a regulating valve oil cylinder pilot valve 6.

[0014] The hydraulic drive unit 5 is connected to the regulator valve cylinder pilot valve 6 and to the drive mechanism 3. The hydraulic drive unit 5 is a mechanism whose opening changes when control oil is supplied from the regulator valve cylinder pilot valve 6, and changes the opening of the regulator valve 2 via the drive mechanism 3. For example, when the opening of the hydraulic drive unit 5 increases (becomes more open) in response to the amount of control oil supplied from the regulator valve cylinder pilot valve 6, the opening of the regulator valve 2 increases via the drive mechanism 3. The hydraulic drive unit 5 is provided with a hydraulic drive unit opening detector 22 and a hydraulic drive unit oil pressure detector 23, which measure the opening and oil pressure of the hydraulic drive unit 5. The hydraulic drive unit opening detector 22 and the hydraulic drive unit oil pressure detector 23 are connected to a recording unit 31 of a machine hydraulic control device monitoring device 30 (described later), and output the measured values ​​of the opening and oil pressure of the hydraulic drive unit 5 to this recording unit 31.

[0015] The regulator valve oil cylinder pilot valve 6 is connected to a speed relay 11 of the machine hydraulic control device 10 and also to the hydraulic drive unit 5. The regulator valve oil cylinder pilot valve 6 is a mechanism whose opening changes when controlled by the speed relay 11, and changes the amount of control oil supplied to the hydraulic drive unit 5. For example, when the opening of the regulator valve oil cylinder pilot valve 6 increases (is more open), the amount of control oil supplied to the hydraulic drive unit 5 increases. The regulator valve oil cylinder pilot valve 6 is provided with a regulator valve oil cylinder pilot valve opening detector 24, which measures the opening of the regulator valve oil cylinder pilot valve 6. The regulator valve oil cylinder pilot valve opening detector 24 is connected to a recording unit 31 of the machine hydraulic control device monitoring device 30 (described later), and outputs the measured value of the opening of the regulator valve 2 to this recording unit 31.

[0016] The mechanical hydraulic control device 10 is connected to the hydraulic drive device 4. The mechanical hydraulic control device 10 changes the opening of the regulating valve 2 via the hydraulic drive device 4 and the drive mechanism 3. The mechanical hydraulic control device 10 includes a speed relay 11, a rotary pilot valve sleeve 12, a rotary pilot valve 13, a speed governing rotation unit 14, a speed governor drive gear device 15, an auxiliary pilot valve 16, a starting device 17, and a synchronizer 18.

[0017] The speed relay 11 is connected to the rotary pilot valve sleeve 12 and to the regulator valve cylinder pilot valve 6 of the hydraulic drive unit 4. The speed relay 11 is a mechanism whose opening changes when control oil is supplied from the rotary pilot valve sleeve 12, and changes the opening of the regulator valve 2 via the hydraulic drive unit 4 and the drive mechanism 3. Specifically, the speed relay 11 has an internal spring, and the opening changes when control oil is supplied to the bottom of the piston against the spring force. The speed relay 11 then changes the opening of the regulator valve cylinder pilot valve 6 of the hydraulic drive unit 3 in response to this change in opening, thereby changing the opening of the regulator valve 2 via the hydraulic drive unit 4 and the drive mechanism 3. For example, when the opening of the speed relay 11 increases (opens further) due to the supply of control oil, the opening of the regulator valve cylinder pilot valve 6 of the hydraulic drive unit 3 also increases. The speed relay 11 is provided with a speed relay opening detector 25 and a speed relay oil pressure detector 26, which measure the opening and oil pressure of the speed relay 11. The speed relay opening detector 25 and the speed relay hydraulic pressure detector 26 are connected to a recording unit 31 of a machine hydraulic control device monitoring device 30 described later, and output the measured value of the opening of the regulator valve 2 to this recording unit 31.

[0018] The rotary pilot valve sleeve 12 is located around the rotary pilot valve 13 and is connected to the auxiliary pilot valve 16 as well as the speed relay 11. The rotary pilot valve sleeve 12 has a control oil inlet and outlet, and supplies the control oil from the auxiliary pilot valve 16 to the speed relay 11. The rotary pilot valve sleeve 12 is also connected to a synchronizer 18. The rotary pilot valve sleeve 12 is a mechanism that changes the oil passage areas of the control oil inlet and outlet under the control of the synchronizer 18, thereby changing the amount of control oil supplied to the speed relay 11. For example, if the oil passage areas of the control oil inlet and outlet of the rotary pilot valve sleeve 12 become larger, the amount of control oil supplied to the speed relay 11 will increase.

[0019] The rotary pilot valve 13 is located inside the rotary pilot valve sleeve 12 and is connected to the speed regulating unit 14. The rotary pilot valve 13 is a mechanism that changes the oil passage area of ​​the control oil inlet and outlet of the rotary pilot valve sleeve 12 by being controlled by the speed regulating unit 14, which will be described later, in accordance with the turbine rotation speed, thereby changing the amount of control oil supplied from the rotary pilot valve sleeve 12 to the speed relay 11. For example, if the oil passage area of ​​the control oil inlet and outlet of the rotary pilot valve sleeve 12 is increased by the rotary pilot valve 13, the amount of control oil supplied to the speed relay 11 will increase.

[0020] The speed governing rotation unit 14 is connected to the speed governor drive gear device 15 and also to the rotary pilot valve 13. The speed governing rotation unit 14 converts the turbine rotation speed transmitted from the speed governor drive gear device 15 into position information (vertical position) and transmits it to the rotary pilot valve 13.

[0021] The governor drive gear device 15 is connected to a turbine (not shown) and is also connected to the speed governing rotation unit 14. The governor drive gear device 15 transmits the rotation speed of the turbine to the speed governing rotation unit 14.

[0022] The auxiliary pilot valve 16 is connected to the rotary pilot valve sleeve 12 and forms a hydraulic circuit in series with the rotary pilot valve sleeve 12 and the speed relay 11. That is, the auxiliary pilot valve 16 supplies control oil to the rotary pilot valve sleeve 12 and also supplies control oil to the speed relay 11 via the rotary pilot valve sleeve 12. The auxiliary pilot valve 16 is also connected to an actuating device 17. The auxiliary pilot valve 16 is a mechanism whose opening is changed by being controlled by the actuating device 17, and changes the amount of control oil supplied to the rotary pilot valve sleeve 12. That is, the auxiliary pilot valve 16 changes the amount of control oil supplied to the rotary pilot valve sleeve 12 and, via this, changes the amount of control oil supplied to the speed relay 11. For example, when the opening of the auxiliary pilot 15 becomes larger (more open), the amount of control oil supplied to the rotary pilot valve sleeve 12 increases, and the amount of control oil supplied to the speed relay 11 also increases. The auxiliary pilot valve 16 is provided with an auxiliary pilot valve opening detector 27, which measures the opening of the auxiliary pilot valve 16. The auxiliary pilot valve opening detector 27 is connected to a recording unit 31 of a machine hydraulic control device monitoring device 30, which will be described later, and outputs the measurement value of the opening of the auxiliary pilot valve 16 to this recording unit 31.

[0023] The starting device 17 is connected to the auxiliary pilot valve 16. The starting device 17 is a mechanism whose opening degree changes under the control of the mechanical hydraulic control device monitoring device 30, and changes the opening degree of the auxiliary pilot valve 16. As the opening degree of the auxiliary pilot valve 16 changes, the amount of control oil supplied from the auxiliary pilot 15 to the speed relay 11 via the rotary pilot valve sleeve 12 changes, changing the opening degree of the speed relay 11. For example, if the opening degree of the starting device 17 increases (is wider), the opening degree of the auxiliary pilot 15 also increases. This increases the amount of control oil supplied from the auxiliary pilot 15 to the speed relay 11 via the rotary pilot valve sleeve 12, increasing the opening degree of the speed relay 11. A starting device opening detector 28 is provided in the starting device 17 to measure the opening degree of the starting device 17. The starting device opening detector 28 is connected to a recording unit 31 of the mechanical hydraulic control device monitoring device 30 (described later), and outputs the measured value of the opening degree of the regulating valve 2 to this recording unit 31.

[0024] The synchronizer 18 is connected to the rotary pilot valve sleeve 12. The synchronizer 18 is a mechanism whose opening is changed by being controlled by the mechanical hydraulic control device monitoring device 30. The synchronizer 18 changes the oil passage area of ​​the control oil inlet and outlet of the rotary pilot valve sleeve 12. As a result, the synchronizer 18 changes the amount of control oil supplied from the rotary pilot valve sleeve 12 to the speed relay 11, thereby changing the opening of the speed relay 11. For example, when the opening of the synchronizer 18 increases (is more open), the oil passage area of ​​the control oil inlet and outlet of the rotary pilot valve sleeve 12 increases. As a result, the amount of control oil supplied from the rotary pilot valve sleeve 12 to the speed relay 11 increases, thereby increasing the opening of the speed relay 11. A synchronizer opening detector 29 is provided in the synchronizer 18 and measures the opening of the synchronizer 18. The synchronizer opening detector 29 is connected to a recording unit 31 of the mechanical hydraulic control device monitoring device 30 (described later), and outputs the measured value of the opening of the regulator valve 2 to this recording unit 31.

[0025] Next, the mechanical hydraulic control device monitoring device 30 of this embodiment will be described. The mechanical hydraulic control device monitoring device 30 is a device that monitors the mechanical hydraulic control device 10, the hydraulic drive unit 4, and the regulating valve 2, and in this embodiment, by monitoring the opening and hydraulic pressure of each component of the mechanical hydraulic control device 10, the hydraulic drive unit 4, and the regulating valve 2, it determines signs of failure and causes of failure of the mechanical hydraulic control device 10, the hydraulic drive unit 4, and the regulating valve 2.

[0026] The monitoring device 30 includes a recording unit 31, a setting unit 32, a determination unit 33, an alarm unit , a display unit 35, and an operation unit .

[0027] The recording unit 31 acquires the measurement values ​​measured by each opening detector and each hydraulic pressure detector, and records the relationship between the predetermined combinations as time-series data. The relationship between the predetermined combinations here is, for example, (1) The relationship between the measured value of the opening of the starting device 17 and the measured value of the opening of the speed relay 11 or the oil pressure (first measurement relationship); (2) The relationship between the measured value of the opening of the synchronizer 18 and the measured value of the opening of the speed relay 11 or the oil pressure (second measurement relationship); (3) The relationship between the measurement value of the opening of the speed relay 11 and the measurement value of the opening or hydraulic pressure of the hydraulic drive unit 5 (third measurement relationship); (4) The relationship between the measured value of the opening of the hydraulic drive unit 5 and the measured value of the opening of the regulating valve 2 (fourth measurement relationship), (5) The relationship between the measured value of the opening of the starting device 17 and the measured value of the opening of the auxiliary pilot valve 16 (fifth measurement relationship); (6) The relationship between the measured value of the opening of the speed relay 11 and the measured value of the opening of the regulator valve oil cylinder pilot valve 6 (sixth measurement relationship), However, the association of predetermined combinations and recording of time-series data is not limited to the above-mentioned cases and combinations.

[0028] The setting unit 32 sets the reference values ​​corresponding to the measurement values ​​measured by each opening detector and each hydraulic pressure detector as a predetermined combination of time-series data. The predetermined combination of time-series data may be, for example, (1) The relationship between the reference value of the opening of the starting device 17 and the reference value of the opening of the speed relay 11 or the oil pressure (first reference relationship); (2) The relationship between the reference value of the opening of the synchronizer 18 and the reference value of the opening or oil pressure of the speed relay 11 (second reference relationship); (3) The relationship between the reference value of the opening of the speed relay 11 and the reference value of the opening or hydraulic pressure of the hydraulic drive unit 5 (third reference relationship); (4) The relationship between the reference value of the opening of the hydraulic drive unit 5 and the reference value of the opening of the regulating valve 2 (fourth reference relationship), (5) The relationship between the reference value of the opening of the starting device 17 and the reference value of the opening of the auxiliary pilot valve 16 (fifth reference relationship), (6) The relationship between the reference value of the opening of the speed relay 11 and the reference value of the opening of the control valve oil cylinder pilot valve 6 (sixth reference relationship), However, the association of predetermined combinations and recording of time-series data is not limited to the above-mentioned cases and combinations.

[0029] Furthermore, the setting unit 32 sets a set value according to the relationship of the above-mentioned predetermined combination in order to determine the relationship between the measurement value measured by each opening detector and the corresponding reference value. The set value according to the predetermined combination here is, for example, (1) a set value (first set value) for determining the relationship between the measured value and the reference value in the first measurement relationship and the first reference relationship; (2) a set value (second set value) for determining the relationship between the measured value and the reference value in the second measurement relationship and the second reference relationship; (3) A set value (third set value) for determining the relationship between the measurement value and the reference value in the third measurement relationship and the third reference relationship; (4) a setting value (fourth setting value) for determining the relationship between the measurement value and the reference value in the fourth measurement relationship and the fourth reference relationship; (5) A set value (fifth set value) for determining the relationship between the measurement value and the reference value in the fifth measurement relationship and the fifth reference relationship; (6) A set value (sixth set value) for determining the relationship between the measurement value and the reference value in the sixth measurement relationship and the sixth reference relationship; However, the association of predetermined combinations and recording of time-series data is not limited to the above-mentioned cases and combinations.

[0030] The determination unit 33 determines the signs of failure and the causes of failure of the mechanical hydraulic control device 10, the hydraulic drive device 4, and the regulating valve 2 based on a set value for determining the relationship between the measurement value measured by each opening detector and the corresponding reference value. For example, the determination unit 33 determines the signs of failure and the causes of failure of the mechanical hydraulic control device 10, the hydraulic drive device 4, and the regulating valve 2 by comparing the first measurement relationship with the first reference relationship based on a first set value (the same applies to the other relationships mentioned above). Specific methods for determining the signs of failure and the causes of failure will be described later.

[0031] The alarm unit 34 outputs an alarm based on the signs of failure and the causes of failure of the mechanical hydraulic control device 10, the hydraulic drive unit 4, and the regulator valve 2 determined by the determination unit 33. Here, outputting an alarm may include, for example, displaying an alarm on a display, outputting an alarm by the light of a lamp, outputting an alarm by the sound of a buzzer, etc.

[0032] The display unit 35 displays the details based on the signs and causes of failure of the mechanical hydraulic control device 10, the hydraulic drive unit 4, and the regulator valve 2 determined by the determination unit 33. Displaying the details here means, for example, displaying the name and number of the faulty device on the display, or displaying an image of the faulty location.

[0033] The operation unit 36 ​​operates the starting device 17 and the synchronization device 18. That is, the starting device 17 and the synchronization device 18 operate in response to commands from the operation unit 35.

[0034] Next, monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment will be described in detail using Figures 2 to 14. Here, the above-mentioned cases (1) to (6) will be described as specific examples. Note that Figure 14 is a table summarizing the signs of failure and the causes of failure determined by the mechanical hydraulic control device monitoring device 30 of this embodiment. Figure 14 aims to facilitate understanding by summarizing the signs of failure and the causes of failure in each of the cases (1) to (6) described below.

[0035] ((1) When monitoring the relationship between the starter 17 and the speed relay 11) First, using FIGS. 2 and 3, we will explain case (1), i.e., the case where the relationship between the starting device 17 and the speed relay 11 is monitored. FIG. 2 is an explanatory diagram for explaining monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment, with FIG. 2(a) being a graph illustrating normal operation and FIGS. 2(b) to 2(d) being graphs illustrating failures. FIG. 3 is a flowchart showing the mechanical hydraulic control device monitoring method 100 of this embodiment. In FIGS. 2(a) to 2(d), the horizontal axis represents the opening of the starting device 17 (starting device opening), and the vertical axis represents the opening of the speed relay 11 (speed relay opening) or hydraulic pressure (hydraulic pressure at the bottom of the speed relay). Note that this relationship is important because it can identify increased rattle or wear in the mechanical lever connection (not shown) connecting the starting device 17 to the speed relay 11 or leakage of control oil from the speed relay 11.

[0036] In Figure 2(a), the curve L SR1 The curve L in FIG. 2(a) shows the relationship between the opening of the starter 17 and the opening of the speed relay 11 in a normal state. SR1 As shown in Fig. 1, when the opening degree of the starting device 17 is increased from the fully closed state, the starting device opening degree X LLM1 The opening of the speed relay 11 starts to increase at . Thereafter, the opening of the speed relay 11 increases as the opening of the starting device 17 increases, and the opening of the starting device X LLM1 At this point, the speed relay 11 is fully open. SR1corresponds to the relationship between the reference value of the opening of the starting device 17 and the reference value of the opening of the speed relay 11, and is set in the setting unit 32 (corresponding to the first reference relationship). SR1 The curve P in FIG. 2(a) shows the relationship between the opening of the starter 17 and the oil pressure of the speed relay 11 in a normal state. SR1 As shown in Fig. 1, when the opening degree of the starting device 17 is increased from the fully closed state, the starting device opening degree X LLM1 The oil pressure of the speed relay 11 starts to increase at the start of ... LLM1 The oil pressure of the speed relay 11 is maximum at this point. SR1 corresponds to the relationship between the reference value of the opening of the starting device 17 and the reference value of the oil pressure of the speed relay 11, and is set in the setting unit 32 (corresponding to the first reference relationship).

[0037] In Figure 2(b), the curve L SR2 is the curve L SR1 The curve L shows the relationship between the opening of the starter 17 and the opening of the speed relay 11. SR2 Now, curve L SR1 The measured values ​​of the opening of the starter 17 and the speed relay 11 are measured so that the curve deviates from this curve L. SR2 This curve L corresponds to the relationship between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the speed relay 11, and is recorded in the recording unit 31 (corresponding to the first measurement relationship). SR1 Curve L deviates from SR2 This is because, for example, if there is increased rattle or wear in the mechanical lever connection that connects the starting device 17 to the speed relay 11, a dead zone occurs due to the increased rattle or wear when the starting device 17 is operated. Therefore, the starting device opening X LLM2 However, the starting device opening degree is X LLM1 The starter opening X is delayed and the speed relay 11 is fully opened. LLM2 ´ is the starting device opening degree X LLM1 It may be later than ´.

[0038] Therefore, when monitoring the relationship between the starting device 17 and the speed relay 11, the determining unit 33 determines the delay in the timing at which the opening of the speed relay 11 starts to increase (X LLM2 -X LLM1 ) and the delay in the timing when the speed relay 11 reaches full open (X LLM2 ´-X LLM1 ´) to K1(X LLM1 ´-X LLM1 Specifically, the determination unit 33 compares the inequality (X LLM2 -X LLM1 )>K1(X LLM1 ´-X LLM1 ) and inequality (X LLM2 ´-X LLM1 ´)>K1(X LLM1 ´-X LLM1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the starting device 17 and the speed relay 11 are determined. K1 here is a setting value (corresponding to a first setting value) for determining the relationship between the measured value of the opening of the starting device 17 and the reference value of the opening of the starting device 17. The setting value K1 is, for example, a real number that satisfies the inequality 0≦K1≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. The setting value K1 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0039] Inequality (X LLM2 -X LLM1 )>K1(X LLM1 ´-X LLM1 ) and inequality (X LLM2 ´-X LLM1 ´)>K1(X LLM1 ´-X LLM1 ) is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the starting device 17 and the speed relay 11. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the starting device 17 and the speed relay 11 are an increase in rattle or wear in the mechanical lever coupling that connects the starting device 17 to the speed relay 11 (see FIG. 14). The alarm unit 34 outputs an alarm regarding the fault sign and the fault factor, and the display unit 35 displays the details of the alarm.

[0040] In Figure 2(c), the curve L SR3 is the curve L SR1 The curve L shows the relationship between the opening of the starter 17 and the opening of the speed relay 11. SR3 Now, curve L SR1 The measured values ​​of the opening of the starter 17 and the speed relay 11 are measured so that the curve deviates from this curve L. SR3 This curve L corresponds to the relationship between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the speed relay 11, and is recorded in the recording unit 31 (corresponding to the first measurement relationship). SR1 Curve L deviates from SR3 This is because, for example, if the rod penetration part of the speed relay 11 wears due to a change in opening during operation, control oil may leak from this worn part. Therefore, in the high opening range of the starting device 17, the opening amount required of the auxiliary pilot valve 16 increases, and the opening of the speed relay 11 becomes full at the starting device opening X LLM2 ´ is the starting device opening degree X LLM1 In this case, the opening of the speed relay 11 in the low opening range of the starting device 17 starts to increase. LLM2 is the starting device opening degree X LLM1 does not change significantly with respect to

[0041] Therefore, when monitoring the relationship between the starting device 17 and the speed relay 11, the determining unit 33 determines the delay in the timing at which the opening of the speed relay 11 starts to increase (X LLM2 -X LLM1 ) and the delay in the timing when the speed relay 11 reaches full open (X LLM2 ´-X LLM1 ´) to K2(X LLM1 ´-X LLM1 Specifically, the determination unit 33 compares the inequality (X LLM2 -X LLM1 ) <K2(X LLM1 ´-X LLM1 ) and inequality (X LLM2 ´-X LLM1 ´)>K2(X LLM1 ´-XLLM1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the starting device 17 and the speed relay 11 are determined. K2 here is a setting value (corresponding to the first setting value) for determining the relationship between the measured value of the opening of the starting device 17 and the reference value of the opening of the starting device 17. The setting value K2 is, for example, a real number that satisfies the inequality 0≦K2≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. The setting value K2 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0042] Inequality (X LLM2 -X LLM1 ) <K2(X LLM1 ´-X LLM1 ) and inequality (X LLM2 ´-X LLM1 ´)>K2(X LLM1 ´-X LLM1 ) is satisfied, the judgment unit 33 judges that there is a fault sign and a fault factor in the relationship between the starting device 17 and the speed relay 11. In this case, the judgment unit 33 judges that the fault sign and the fault factor in the relationship between the starting device 17 and the speed relay 11 are a leakage of control oil from the speed relay 11 (see Figure 146). The alarm unit 34 outputs an alarm regarding this fault sign and fault factor, and the display unit 35 displays the details of the alarm.

[0043] In Figure 2(d), the curve P SR3 is the curve P SR1 1 shows the relationship between the opening of the starter 17 and the oil pressure of the speed relay 11, which is a curve that deviates from the curve P SR3 Now, the curve P SR1 The measured value of the opening of the starting device 17 and the measured value of the oil pressure of the speed relay 11 are measured so that the curve deviates from this curve P SR3 corresponds to the relationship between the measured value of the opening of the starting device 17 and the measured value of the oil pressure of the speed relay 11, and is recorded in the recording unit 31 (corresponding to the first measurement relationship). SR1 Curve P deviates from SR3This is because, for example, if the rod penetration part of the speed relay 11 wears due to a change in opening during operation, control oil may leak from this worn part. Therefore, in the high opening range of the starting device 17, the opening amount required of the auxiliary pilot valve 16 increases, and the oil pressure of the speed relay 11 becomes maximum at the starting device opening X LLM2 ´ is the starting device opening degree X LLM1 In this case, the oil pressure of the speed relay 11 in the low opening range of the starting device 17 starts to increase at the starting device opening X'. LLM2 is the starting device opening degree X LLM1 does not change significantly relative to

[0044] Therefore, when monitoring the relationship between the starting device 17 and the speed relay 11, the determining unit 33 determines the delay in the timing at which the oil pressure of the speed relay 11 starts to increase (X LLM2 -X LLM1 ) and the delay in timing when the oil pressure of the speed relay 11 reaches its maximum (X LLM2 ´-X LLM1 ´) to K3(X LLM1 ´-X LLM1 Specifically, the determination unit 33 compares the inequality (X LLM2 -X LLM1 ) <K3(X LLM1 ´-X LLM1 ) and inequality (X LLM2 ´-X LLM1 ´)>K3(X LLM1 ´-X LLM1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the starting device 17 and the speed relay 11 are determined. K3 here is a setting value (corresponding to the first setting value) for determining the relationship between the measured value of the opening of the starting device 17 and the reference value of the opening of the starting device 17. The setting value K3 is, for example, a real number that satisfies the inequality 0≦K3≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. The setting value K3 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0045] Inequality (X LLM2 -X LLM1 ) <K3(X LLM1´-X LLM1 ) and inequality (X LLM2 ´-X LLM1 ´)>K3(X LLM1 ´-X LLM1 ) is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the starting device 17 and the speed relay 11. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the starting device 17 and the speed relay 11 are a leakage of control oil from the speed relay 11 (see FIG. 14). The alarm unit 34 outputs an alarm regarding this fault sign and fault factor, and the display unit 35 displays the details of the alarm.

[0046] Next, the machine hydraulic control device monitoring method 100 of this embodiment will be described with reference to FIG.

[0047] First, the opening of the starting device 17 (starting device opening) and the opening of the speed relay 11 (speed relay opening) or the oil pressure (speed relay lower oil pressure) are measured (step S101). Specifically, while the opening of the starting device 17 is increased from a fully closed state until the speed relay 11 is fully open, the starting device opening detector 28 and the speed relay opening detector 25 measure the opening of the starting device 17 and the opening of the speed relay 11. Alternatively, while the opening of the starting device 17 is increased from a fully closed state until the oil pressure of the speed relay 11 reaches its maximum, the starting device opening detector 28 and the speed relay oil pressure detector 26 measure the opening of the starting device 17 and the oil pressure of the speed relay 11.

[0048] Next, the relationship (corresponding to the first measurement relationship) between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the speed relay 11 or the oil pressure is recorded in the recording unit 31 (step S102). Specifically, the recording unit 31 records the measurement value of the opening of the starting device 17 and the measurement value of the opening of the speed relay 11 or the oil pressure as time-series data in association with each other.

[0049] Next, a failure sign and a failure factor in the relationship between the starting device 17 and the speed relay 11 are determined (step S103). Specifically, first, the determination unit 33 acquires the measurement value of the opening of the starting device 17 from the recording unit 31 in which the relationship (corresponding to the first measurement relationship) between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the speed relay 11 or the hydraulic pressure is recorded. The determination unit 33 also acquires the reference value of the opening of the starting device 17 from the setting unit 32 in which the relationship (corresponding to the first reference relationship) between the reference value of the opening of the starting device 17 and the reference value of the opening of the speed relay 11 or the hydraulic pressure is set. The determination unit 33 also acquires from the setting unit 32 setting values ​​K1, K2, K3 (corresponding to the first setting values) for determining the relationship between the measurement value of the opening of the starting device 17 and the reference value of the opening of the starting device 17. Thereafter, the determination unit 33 compares the measured value of the opening of the starting device 17 with the reference value of the opening of the starting device 17 based on each inequality using the above-mentioned set values ​​K1, K2, and K3 (corresponding to the first set values). From this comparison, the determination unit 33 determines the failure signs and failure factors in the relationship between the starting device 17 and the speed relay 11.

[0050] If the determination unit 33 determines that there are failure signs and failure factors (YES in step S104), the warning unit 34 outputs a warning regarding the failure signs and failure factors, and the display unit 35 displays details regarding the failure signs and failure factors (step S105) (see FIG. 14). On the other hand, if the determination unit 33 determines that there are no failure signs or failure factors (NO in step S104), this flow ends.

[0051] ((2) When monitoring the relationship between the synchronizer 18 and the speed relay 11) Next, using FIGS. 4 and 5, we will explain the case (2), i.e., the case where the relationship between the synchronizer 18 and the speed relay 11 is monitored. FIG. 4 is an explanatory diagram for explaining monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment, with FIG. 4(a) being a graph illustrating normal operation and FIGS. 4(b) to 4(d) being graphs illustrating failures. FIG. 5 is a flowchart showing a mechanical hydraulic control device monitoring method 200 of this embodiment. In FIGS. 4(a) to 4(d), the horizontal axis represents the opening of the synchronizer 18 (synchronizer opening), and the vertical axis represents the opening of the speed relay 11 (speed relay opening) or hydraulic pressure (lower speed relay hydraulic pressure). Note that this relationship is important because it can identify increased rattle or wear in the mechanical lever connection (not shown) connecting the synchronizer 18 to the speed relay 11 or leakage of control oil from the speed relay 11.

[0052] In Figure 4(a), the curve L SR4 The curve L in FIG. 4(a) shows the relationship between the opening of the synchronizer 18 and the opening of the speed relay 11 in a normal state. SR4 As shown in Fig. 1, when the opening of the synchronizer 18 is increased from the fully closed state, the synchronizer opening X SLC1 The opening of the speed relay 11 starts to increase at . Thereafter, the opening of the speed relay 11 increases as the opening of the synchronizer 18 increases, and the opening of the synchronizer X SLC1 At this point, the speed relay 11 is fully open. SR4 corresponds to the relationship between the reference value of the opening of the synchronizer 18 and the reference value of the opening of the speed relay 11, and is set in the setting unit 32 (corresponding to the second reference relationship). SR4 The curve P in FIG. 4(a) shows the relationship between the opening of the synchronizer 18 and the oil pressure of the speed relay 11 in a normal state. SR4 As shown in Fig. 1, when the opening of the synchronizer 18 is increased from the fully closed state, the synchronizer opening X SLC1 The oil pressure of the speed relay 11 starts to increase at the time when the opening of the synchronizer 18 increases. SLC1 The oil pressure of the speed relay 11 is maximum at this point. SR4corresponds to the relationship between the reference value of the opening of the synchronizer 18 and the reference value of the oil pressure of the speed relay 11, and is set in the setting unit 32 (corresponding to the second reference relationship).

[0053] In Figure 4(b), the curve L SR5 is the curve L SR4 The curve L shows the relationship between the opening of the synchronizer 18 and the opening of the speed relay 11, which is a curve that deviates from the curve L. SR5 Now, curve L SR4 The measured value of the opening of the synchronizer 18 and the measured value of the opening of the speed relay 11 are measured so that the curve deviates from this curve L. SR5 corresponds to the relationship between the measured value of the opening of the synchronizer 18 and the measured value of the opening of the speed relay 11, and is recorded in the recording unit 31 (corresponding to the second measurement relationship). SR4 Curve L deviates from SR5 This is because, for example, if there is increased rattle or wear in the mechanical lever connection that connects the synchronizer 18 to the speed relay 11, a dead zone occurs due to the increased rattle or wear when the synchronizer 18 is operated. Therefore, the synchronizer opening X SLC2 Synchronous device opening X SLC1 The synchronizer opening X is delayed and the speed relay 11 is fully opened. SLC2 ´ is the synchronizer opening X SLC1 It may be later than ´.

[0054] Therefore, when monitoring the relationship between the synchronizer 18 and the speed relay 11, the determination unit 33 determines the delay in the timing at which the opening of the speed relay 11 starts to increase (X SLC2 -X SLC1 ) and the delay in the timing when the speed relay 11 reaches full open (X SLC2 ´-X SLC1 ´) to K4(X SLC1 ´-X SLC1 Specifically, the determination unit 33 compares the inequality (X SLC2 -X SLC1 )>K4(X SLC1 ´-X SLC1 ) and inequality (X SLC2´-X SLC1 ´)>K4(X SLC1 ´-X SLC1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the synchronizer 18 and the speed relay 11 are determined. K4 here is a setting value (corresponding to a second setting value) for determining the relationship between the measured value of the opening of the synchronizer 18 and the reference value of the opening of the synchronizer 18. The setting value K4 is, for example, a real number that satisfies the inequality 0≦K4≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. The setting value K4 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0055] Inequality (X SLC2 -X SLC1 )>K4(X SLC1 ´-X SLC1 ) and inequality (X SLC2 ´-X SLC1 ´)>K4(X SLC1 ´-X SLC1 ) is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the synchronizer 18 and the speed relay 11. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the synchronizer 18 and the speed relay 11 are an increase in rattle or wear in the mechanical lever coupling that connects the synchronizer 18 to the speed relay 11 (see FIG. 14). The alarm unit 34 outputs an alarm regarding the fault sign and the fault factor, and the display unit 35 displays the details of the alarm.

[0056] In Figure 4(c), the curve L SR6 is the curve L SR4 The curve L shows the relationship between the opening of the synchronizer 18 and the opening of the speed relay 11, which is a curve that deviates from the curve L. SR6 Now, curve L SR4 The measured value of the opening of the synchronizer 18 and the measured value of the opening of the speed relay 11 are measured so that the curve deviates from this curve L. SR6 corresponds to the relationship between the measured value of the opening of the synchronizer 18 and the measured value of the opening of the speed relay 11, and is recorded in the recording unit 31 (corresponding to the second measurement relationship).SR4 Curve L deviates from SR6 This is because, for example, if the rod penetration part of the speed relay 11 wears due to a change in the opening during operation, control oil may leak from this worn part. Therefore, in the high opening range of the synchronizer 18, the opening amount required of the auxiliary pilot valve 16 increases, and the opening of the speed relay 11 becomes full at the synchronizer opening X SLC2 ´ is the synchronizer opening X SLC1 In this case, the opening of the speed relay 11 in the low opening range of the synchronizer 18 starts to increase. SLC2 is the synchronizer opening X SLC1 does not change significantly relative to

[0057] Therefore, when monitoring the relationship between the synchronizer 18 and the speed relay 11, the determination unit 33 determines the delay in the timing at which the opening of the speed relay 11 starts to increase (X SLC2 -X SLC1 ) and the delay in the timing when the speed relay 11 reaches full open (X SLC2 ´-X SLC1 ´) and K5(X SLC1 ´-X SLC1 Specifically, the determination unit 33 compares the inequality (X SLC2 -X SLC1 ) <K5(X SLC1 ´-X SLC1 ) and inequality (X SLC2 ´-X SLC1 ´)>K5(X SLC1 ´-X SLC1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the synchronizer 18 and the speed relay 11 are determined. K5 here is a setting value (corresponding to a second setting value) for determining the relationship between the measured value of the opening of the synchronizer 18 and the reference value of the opening of the synchronizer 18. The setting value K5 is, for example, a real number that satisfies the inequality 0≦K5≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. The setting value K5 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0058] Inequality (X SLC2-X SLC1 ) <K5(X SLC1 ´-X SLC1 ) and inequality (X SLC2 ´-X SLC1 ´)>K5(X SLC1 ´-X SLC1 ) is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the synchronizer 18 and the speed relay 11. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the synchronizer 18 and the speed relay 11 are a leakage of control oil from the speed relay 11 (see FIG. 14). The alarm unit 34 outputs an alarm regarding this fault sign and fault factor, and the display unit 35 displays the details of the alarm.

[0059] In Figure 4(d), the curve P SR6 is the curve P SR4 1 shows the relationship between the opening of the synchronizer 18 and the oil pressure of the speed relay 11, which is a curve that deviates from the curve P SR6 Now, the curve P SR4 The measured value of the opening of the synchronizer 18 and the measured value of the oil pressure of the speed relay 11 are measured so that the curve deviates from this curve P SR6 corresponds to the relationship between the measured value of the opening of the synchronizer 18 and the measured value of the oil pressure of the speed relay 11, and is recorded in the recording unit 31 (corresponding to the second measurement relationship). SR4 Curve P deviates from SR6 This is because, for example, if the rod penetration part of the speed relay 11 wears due to a change in the opening during operation, control oil may leak from this worn part. Therefore, in the high opening range of the synchronizer 18, the opening amount required of the auxiliary pilot valve 16 increases, and the oil pressure of the speed relay 11 becomes maximum at the synchronizer opening X SLC2 ´ is the synchronizer opening X SLC1 In this case, the oil pressure of the speed relay 11 in the low opening range of the synchronizer 18 starts to increase at the synchronizer opening X'. SLC2 is the synchronizer opening X SLC1 does not change significantly relative to

[0060] Therefore, when monitoring the relationship between the synchronizer 18 and the speed relay 11, the determination unit 33 determines the delay in the timing at which the hydraulic pressure of the speed relay 11 starts to increase (X SLC2 -X SLC1 ) and the delay in timing when the oil pressure of the speed relay 11 reaches its maximum (X SLC2 ´-X SLC1 ´) to K6(X SLC1 ´-X SLC1 Specifically, the determination unit 33 compares the inequality (X SLC2 -X SLC1 ) <K6(X SLC1 ´-X SLC1 ) and inequality (X SLC2 ´-X SLC1 ´)>K6(X SLC1 ´-X SLC1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the synchronizer 18 and the speed relay 11 are determined. K6 here is a setting value (corresponding to a second setting value) for determining the relationship between the measured value of the opening of the synchronizer 18 and the reference value of the opening of the synchronizer 18. The setting value K6 is, for example, a real number that satisfies the inequality 0≦K6≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. The setting value K6 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0061] Inequality (X SLC2 -X SLC1 ) <K6(X SLC1 ´-X SLC1 ) and inequality (X SLC2 ´-X SLC1 ´)>K6(X SLC1 ´-X SLC1 ) is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the synchronizer 18 and the speed relay 11. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the synchronizer 18 and the speed relay 11 are a leakage of control oil from the speed relay 11 (see FIG. 14). The alarm unit 34 outputs an alarm regarding this fault sign and fault factor, and the display unit 35 displays the details of the alarm.

[0062] Next, a method 200 for monitoring a machine hydraulic control device according to this embodiment will be described with reference to FIG.

[0063] First, the opening of the synchronizer 18 (synchronizer opening) and the opening of the speed relay 11 (speed relay opening) or the oil pressure (speed relay lower oil pressure) are measured (step S201). Specifically, while the opening of the synchronizer 18 is increased from a fully closed state until the opening of the speed relay 11 becomes fully open, the synchronizer opening detector 29 and the speed relay opening detector 25 measure the opening of the synchronizer 18 and the opening of the speed relay 11. Alternatively, while the opening of the synchronizer 18 is increased from a fully closed state until the oil pressure of the speed relay 11 becomes maximum, the synchronizer opening detector 29 and the speed relay oil pressure detector 26 measure the opening of the synchronizer 18 and the oil pressure of the speed relay 11.

[0064] Next, the relationship (corresponding to the second measurement relationship) between the measurement value of the opening of the synchronizer 18 and the measurement value of the opening of the speed relay 11 or the hydraulic pressure is recorded in the recording unit 31 (step S202). Specifically, the recording unit 31 records the measurement value of the opening of the synchronizer 18 and the measurement value of the opening of the speed relay 11 or the hydraulic pressure in association with each other as time-series data.

[0065] Next, a failure sign and a failure factor in the relationship between the synchronizer 18 and the speed relay 11 are determined (step S203). Specifically, first, the determination unit 33 acquires the measurement value of the opening of the synchronizer 18 from the recording unit 31 in which the relationship (corresponding to the second measurement relationship) between the measurement value of the opening of the synchronizer 18 and the measurement value of the opening of the speed relay 11 or the hydraulic pressure is recorded. The determination unit 33 also acquires the reference value of the opening of the synchronizer 18 from the setting unit 32 in which the relationship (corresponding to the second reference relationship) between the reference value of the opening of the synchronizer 18 and the reference value of the opening of the speed relay 11 or the hydraulic pressure is set. The determination unit 33 also acquires from the setting unit 32 setting values ​​K4, K5, and K6 (corresponding to the second setting values) for determining the relationship between the measurement value of the opening of the synchronizer 18 and the reference value of the opening of the synchronizer 18. Thereafter, the determination unit 33 compares the measured value of the opening of the synchronizer 18 with the reference value of the opening of the synchronizer 18 based on each inequality using the above-mentioned set values ​​K4, K5, and K6 (corresponding to the second set values). From this comparison, the determination unit 33 determines the signs of failure and the cause of failure in the relationship between the synchronizer 18 and the speed relay 11.

[0066] If the determination unit 33 determines that there are failure signs and failure factors (YES in step S204), the warning unit 34 outputs a warning regarding the failure signs and failure factors, and the display unit 35 displays details regarding the failure signs and failure factors (step S205) (see FIG. 14). On the other hand, if the determination unit 33 determines that there are no failure signs or failure factors (NO in step S204), this flow ends.

[0067] ((3) When monitoring the relationship between the speed relay 11 and the hydraulic drive unit 5) Next, using FIGS. 6 and 7, we will explain the case (3), i.e., the case where the relationship between the speed relay 11 and the hydraulic drive unit 5 is monitored. FIG. 6 is an explanatory diagram for explaining monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment, with FIG. 6(a) being a graph illustrating normal operation and FIGS. 6(b) to 6(d) being graphs illustrating failures. FIG. 7 is a flowchart showing the mechanical hydraulic control device monitoring method 300 of this embodiment. In FIGS. 6(a) to 6(d), the horizontal axis represents the opening of the speed relay 11 (speed relay opening), and the vertical axis represents the opening of the hydraulic drive unit 5 (hydraulic drive unit opening) or hydraulic pressure (hydraulic drive unit lower hydraulic pressure). Note that this relationship is of interest because it can identify increased rattle or wear in the mechanical lever connection (not shown) connecting the speed relay 11 to the hydraulic drive unit 5 or leakage of control oil from the hydraulic drive unit 5.

[0068] In Figure 6(a), the curve L HYD1 The curve L in FIG. 6(a) shows the relationship between the opening of the speed relay 11 and the opening of the hydraulic drive unit 5 in a normal state. HYD1 As shown in Fig. 1, when the opening of the speed relay 11 is increased from the fully closed state, the speed relay opening X SR1 The opening of the hydraulic drive unit 5 starts to increase at . Thereafter, the opening of the hydraulic drive unit 5 increases as the opening of the speed relay 11 increases, and the speed relay opening X SR1 At this point, the hydraulic drive unit 5 is fully open. HYD1 corresponds to the relationship between the reference value of the opening of the speed relay 11 and the reference value of the opening of the hydraulic drive unit 5, and is set in the setting unit 32 (corresponding to the third reference relationship). HYD1 The curve P in FIG. 6(a) shows the relationship between the opening of the speed relay 11 and the hydraulic pressure of the hydraulic drive unit 5 in a normal state. HYD1 As shown in Fig. 1, when the opening of the speed relay 11 is increased from the fully closed state, the speed relay opening X SR1 The hydraulic pressure of the hydraulic drive unit 5 starts to increase at . Thereafter, the hydraulic pressure of the hydraulic drive unit 5 increases as the opening of the speed relay 11 increases, and the speed relay opening X SR1 The hydraulic pressure of the hydraulic drive unit 5 is at its maximum at this curve P HYD1corresponds to the relationship between the reference value of the opening of the speed relay 11 and the reference value of the hydraulic pressure of the hydraulic drive unit 5, and is set in the setting unit 32 (corresponding to the third reference relationship).

[0069] In Figure 6(b), the curve L HYD2 is the curve L HYD1 1 shows the relationship between the opening of the speed relay 11 and the opening of the hydraulic drive unit 5, which is a curve that deviates from the curve L. HYD2 Now, curve L HYD1 The measured values ​​of the opening of the speed relay 11 and the hydraulic drive unit 5 are measured so that the curve deviates from this curve L. HYD2 This curve L corresponds to the relationship between the measurement value of the opening of the speed relay 11 and the measurement value of the opening of the hydraulic drive unit 5, and is recorded in the recording unit 31 (corresponding to the third measurement relationship). HYD1 Curve L deviates from HYD2 This is because, for example, if there is increased rattle or wear in the mechanical lever connection that connects the speed relay 11 to the hydraulic drive unit 5, a dead zone occurs due to the increased rattle or wear when the speed relay 11 is operated. SR2 But the speed relay opening X SR1 The speed relay opening X is delayed and the opening of the hydraulic drive unit 5 is fully opened. SR2 ´ is the speed relay opening X SR1 It may be later than ´.

[0070] Therefore, when monitoring the relationship between the speed relay 11 and the hydraulic drive unit 5, the determination unit 33 determines the delay in the timing at which the opening of the hydraulic drive unit 5 starts to increase (X SR2 -X SR1 ) and the delay in the timing when the hydraulic drive unit 5 is fully opened (X SR2 ´-X SR1 ´) to K7(X SR1 ´-X SR1 Specifically, the determination unit 33 compares the inequality (X SR2 -X SR1 )>K7(X SR1 ´-X SR1 ) and inequality (X SR2´-X SR1 ´)>K7(X SR1 ´-X SR1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the speed relay 11 and the hydraulic drive unit 5 are determined. K7 here is a setting value (corresponding to a third setting value) for determining the relationship between the measured value of the opening of the speed relay 11 and the reference value of the opening of the speed relay 11. The setting value K7 is, for example, a real number that satisfies the inequality 0≦K7≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. Note that the setting value K7 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0071] Inequality (X SR2 -X SR1 )>K7(X SR1 ´-X SR1 ) and inequality (X SR2 ´-X SR1 ´)>K7(X SR1 ´-X SR1 ) is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the speed relay 11 and the hydraulic drive unit 5. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the speed relay 11 and the hydraulic drive unit 5 are an increase in rattle or wear in the mechanical lever coupling that connects the speed relay 11 to the hydraulic drive unit 5 (see FIG. 14). The alarm unit 34 outputs an alarm regarding the fault sign and the fault factor, and the display unit 35 displays the details of the alarm.

[0072] In Figure 6(c), the curve L HYD3 is the curve L HYD1 1 shows the relationship between the opening of the speed relay 11 and the opening of the hydraulic drive unit 5, which is a curve that deviates from the curve L. HYD3 Now, curve L HYD1 The measured values ​​of the opening of the speed relay 11 and the hydraulic drive unit 5 are measured so that the curve deviates from this curve L. HYD3 This curve L corresponds to the relationship between the measurement value of the opening of the speed relay 11 and the measurement value of the opening of the hydraulic drive unit 5, and is recorded in the recording unit 31 (corresponding to the third measurement relationship).HYD1 Curve L deviates from HYD3 This is because, for example, if the rod penetration part of the hydraulic drive unit 5 wears due to a change in the opening during operation, control oil may leak from this worn part. Therefore, in the high opening range of the speed relay 11, the opening amount required of the regulator oil cylinder pilot valve 6 increases, and the speed relay opening X SR2 ´ is the speed relay opening X SR1 In this case, the speed relay opening X' at which the opening of the hydraulic drive unit 5 in the low opening range of the speed relay 11 starts to increase may be delayed. SR2 is the speed relay opening X SR1 does not change significantly relative to

[0073] Therefore, when monitoring the relationship between the speed relay 11 and the hydraulic drive unit 5, the determination unit 33 determines the delay in the timing at which the opening of the hydraulic drive unit 5 starts to increase (X SR2 -X SR1 ) and the delay in the timing when the hydraulic drive unit 5 is fully opened (X SR2 ´-X SR1 ´) to K8(X SR1 ´-X SR1 Specifically, the determination unit 33 compares the inequality (X SR2 -X SR1 ) <K8(X SR1 ´-X SR1 ) and inequality (X SR2 ´-X SR1 ´)>K8(X SR1 ´-X SR1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the speed relay 11 and the hydraulic drive unit 5 are determined. K8 here is a setting value (corresponding to a third setting value) for determining the relationship between the measured value of the opening of the speed relay 11 and the reference value of the opening of the speed relay 11. The setting value K8 is, for example, a real number that satisfies the inequality 0≦K8≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. Note that the setting value K8 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0074] Inequality (XSR2 -X SR1 ) <K8(X SR1 ´-X SR1 ) and inequality (X SR2 ´-X SR1 ´)>K8(X SR1 ´-X SR1 ) is satisfied, it is determined that there is a failure sign and a failure factor in the relationship between the speed relay 11 and the hydraulic drive unit 5. In this case, the determination unit 33 determines that the failure sign and the failure factor in the relationship between the speed relay 11 and the hydraulic drive unit 5 are a leakage of control oil from the hydraulic drive unit 5 (see FIG. 14). The alarm unit 34 outputs an alarm regarding this failure sign and failure factor, and the display unit 35 displays the details of the alarm.

[0075] In Figure 6(d), the curve P HYD3 is the curve P HYD1 1 shows the relationship between the opening of the speed relay 11 and the hydraulic pressure of the hydraulic drive unit 5, which is a curve that deviates from the curve P HYD3 Now, the curve P HYD1 The measured value of the opening of the speed relay 11 and the measured value of the hydraulic pressure of the hydraulic drive unit 5 are measured so that the curve deviates from this curve P HYD3 corresponds to the relationship between the measured value of the opening of the speed relay 11 and the measured value of the hydraulic pressure of the hydraulic drive unit 5, and is recorded in the recording unit 31 (corresponding to the third measurement relationship). HYD1 Curve P deviates from HYD3 This is because, for example, if the rod penetration part of the hydraulic drive unit 5 becomes worn due to a change in the opening during operation, control oil may leak from this worn part. Therefore, in the high opening range of the speed relay 11, the opening amount required of the regulator oil cylinder pilot valve 6 increases, and the speed relay opening X SR2 ´ is the speed relay opening X SR1 In this case, the speed relay opening X' at which the hydraulic pressure of the hydraulic drive unit 5 in the low opening range of the speed relay 11 starts to increase may be delayed. SR2 is the speed relay opening X SR1 does not change significantly relative to

[0076] Therefore, when monitoring the relationship between the speed relay 11 and the hydraulic drive unit 5, the determination unit 33 determines the delay in the timing at which the hydraulic pressure of the hydraulic drive unit 5 starts to increase (X SR2 -X SR1 ) and the delay in the timing when the hydraulic pressure of the hydraulic drive unit 5 reaches its maximum (X SR2 ´-X SR1 ´) to K9(X SR1 ´-X SR1 Specifically, the determination unit 33 compares the inequality (X SR2 -X SR1 ) <K9(X SR1 ´-X SR1 ) and inequality (X SR2 ´-X SR1 ´)>K9(X SR1 ´-X SR1 ) is satisfied, the fault predictor and the cause of the fault in the relationship between the speed relay 11 and the hydraulic drive unit 5 are determined. K9 here is a setting value (corresponding to a third setting value) for determining the relationship between the measured value of the opening of the speed relay 11 and the reference value of the opening of the speed relay 11. The setting value K9 is, for example, a real number that satisfies the inequality 0≦K9≦1, and corresponds to the detection sensitivity when detecting a change in the measurement value. Note that the setting value K9 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0077] Inequality (X SR2 -X SR1 ) <K9(X SR1 ´-X SR1 ) and inequality (X SR2 ´-X SR1 ´)>K9(X SR1 ´-X SR1 ) is satisfied, the determination unit 33 determines that there is a failure sign and a failure factor in the relationship between the speed relay 11 and the hydraulic drive unit 5. In this case, the determination unit 33 determines that the failure sign and the failure factor in the relationship between the speed relay 11 and the hydraulic drive unit 5 are a leakage of control oil from the hydraulic drive unit 5 (see FIG. 14). The alarm unit 34 outputs an alarm regarding this failure sign and failure factor, and the display unit 35 displays the details of the alarm.

[0078] Next, a method 300 for monitoring a machine hydraulic control device according to this embodiment will be described with reference to FIG.

[0079] First, the opening of the speed relay 11 (speed relay opening) and the opening of the hydraulic drive unit 5 (hydraulic drive unit opening) or the hydraulic pressure (hydraulic drive unit lower hydraulic pressure) are measured (step S301). Specifically, while the opening of the speed relay 11 is increased from a fully closed state until the hydraulic drive unit 5 is fully opened, the speed relay opening detector 25 and the hydraulic drive unit opening detector 22 measure the opening of the speed relay 11 and the opening of the hydraulic drive unit 5. Alternatively, while the opening of the speed relay 11 is increased from a fully closed state until the hydraulic pressure of the hydraulic drive unit 5 reaches its maximum, the speed relay opening detector 25 and the hydraulic drive unit hydraulic pressure detector 23 measure the opening of the speed relay 11 and the hydraulic pressure of the hydraulic drive unit 5.

[0080] Next, the relationship (corresponding to the third measurement relationship) between the measurement value of the opening of the speed relay 11 and the measurement value of the opening or hydraulic pressure of the hydraulic drive unit 5 is recorded in the recording unit 31 (step S302). Specifically, the recording unit 31 records the measurement value of the opening of the speed relay 11 and the measurement value of the opening or hydraulic pressure of the hydraulic drive unit 5 as time-series data in association with each other.

[0081] Next, a failure sign and a failure factor in the relationship between the speed relay 11 and the hydraulic drive unit 5 are determined (step S303). Specifically, first, the determination unit 33 acquires the measurement value of the opening of the speed relay 11 from the recording unit 31 in which the relationship (corresponding to the third measurement relationship) between the measurement value of the opening of the speed relay 11 and the measurement value of the opening or hydraulic pressure of the hydraulic drive unit 5 is recorded. The determination unit 33 also acquires the reference value of the opening of the speed relay 11 from the setting unit 32 in which the relationship (corresponding to the third reference relationship) between the reference value of the opening of the speed relay 11 and the reference value of the opening or hydraulic pressure of the hydraulic drive unit 5 is set. The determination unit 33 also acquires from the setting unit 32 setting values ​​K7, K8, and K9 (corresponding to the third setting values) for determining the relationship between the measurement value of the opening of the speed relay 11 and the reference value of the opening of the speed relay 11. Thereafter, the determination unit 33 compares the measured value of the opening of the speed relay 11 with the reference value of the opening of the speed relay 11 based on each inequality using the above-mentioned set values ​​K7, K8, and K9 (corresponding to the third set value). From this comparison, the determination unit 33 determines the signs of failure and the cause of failure in the relationship between the speed relay 11 and the hydraulic drive unit 5.

[0082] If the determination unit 33 determines that there are failure signs and failure factors (YES in step S304), the warning unit 34 outputs a warning regarding the failure signs and failure factors, and the display unit 35 displays details regarding the failure signs and failure factors (step S305) (see FIG. 14). On the other hand, if the determination unit 33 determines that there are no failure signs or failure factors (NO in step S304), this flow ends.

[0083] ((4) When monitoring the relationship between the hydraulic drive unit 5 and the regulator valve 2) Next, using FIGS. 8 and 9, we will explain case (4), i.e., the case where the relationship between the hydraulic drive unit 5 and the regulator valve 2 is monitored. FIG. 8 is an explanatory diagram for explaining monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment, with FIG. 8(a) being a graph for explaining normal operation and FIG. 8(b) being a graph for explaining a failure. FIG. 9 is a flowchart showing a mechanical hydraulic control device monitoring method 400 of this embodiment. In FIGS. 8(a) and 8(b), the horizontal axis represents the opening of the hydraulic drive unit 5 (hydraulic drive unit opening), and the vertical axis represents the opening of the regulator valve 2 (regulator valve opening). Note that this relationship is of interest because it can identify increased rattle or wear in the mechanical lever connection (not shown) connecting the hydraulic drive unit 5 to the regulator valve 2.

[0084] In FIG. 8(a), the curve L CV1 The curve L in FIG. 8(a) shows the relationship between the opening of the hydraulic drive unit 5 and the opening of the regulating valve 2 in a normal state. CV1 As shown in Fig. 1, when the opening degree of the hydraulic drive unit 5 is increased from the fully closed state, the hydraulic drive unit opening degree X HYD1 The opening of the regulator valve 2 starts to increase at . Thereafter, the opening of the regulator valve 2 increases as the opening of the hydraulic drive unit 5 increases, and the hydraulic drive unit opening X HYD1 At this point, the valve 2 is fully open. CV1 corresponds to the relationship between the reference value of the opening degree of the hydraulic drive unit 5 and the reference value of the opening degree of the regulating valve 2, and is set in the setting unit 32 (corresponding to the fourth reference relationship).

[0085] In Figure 8(b), the curve L CV2 is the curve L CV1 The relationship between the opening of the hydraulic drive unit 5 and the opening of the regulator valve 2 is shown in the curve L. CV2 Now, curve L CV1 The measured values ​​of the opening of the hydraulic drive unit 5 and the opening of the regulator valve 2 are measured so that the curve deviates from this curve L. CV2 This curve L corresponds to the relationship between the measured value of the opening of the hydraulic drive unit 5 and the measured value of the opening of the regulating valve 2, and is recorded in the recording unit 31 (corresponding to the fourth measurement relationship). CV1Curve L deviates from CV2 This is because, for example, if there is increased rattle or wear in the mechanical lever connection that connects the hydraulic drive unit 5 to the regulator valve 2, a dead zone occurs due to the increased rattle or wear when the hydraulic drive unit 5 is operated. Therefore, the hydraulic drive unit opening X HYD2 But, hydraulic drive unit opening X HYD1 The hydraulic drive unit opening X is delayed and the opening of the regulator valve 2 is fully opened. HYD2 ´ is the hydraulic drive unit opening X HYD1 It may be later than ´.

[0086] Therefore, when monitoring the relationship between the hydraulic drive unit 5 and the regulator valve 2, the determination unit 33 determines the delay in the timing at which the opening of the regulator valve 2 starts to increase (X HYD2 -X HYD1 ) and the delay in the timing when the regulator valve 2 opens fully (X HYD2 ´-X HYD1 ´) to K10(X HYD1 ´-X HYD1 Specifically, the determination unit 33 compares the inequality (X HYD2 -X HYD1 )>K10(X HYD1 ´-X HYD1 ) and inequality (X HYD2 ´-X HYD1 ´)>K10(X HYD1 ´-X HYD1 ) is satisfied, the failure signs and causes in the relationship between the hydraulic drive unit 5 and the regulator valve 2 are determined. K10 here is a setting value (corresponding to the fourth setting value) for determining the relationship between the measured value of the opening of the hydraulic drive unit 5 and the reference value of the opening of the hydraulic drive unit 5. The setting value K10 is, for example, a real number that satisfies the inequality 0≦K10≦1, and corresponds to the detection sensitivity when detecting changes in the measurement value. Note that the setting value K10 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0087] Inequality (X HYD2 -X HYD1 )>K10(X HYD1 ´-X HYD1) and inequality (X HYD2 ´-X HYD1 ´)>K10(X HYD1 ´-X HYD1 ) is satisfied, the determination unit 33 determines that there is a failure sign and a failure factor in the relationship between the hydraulic drive unit 5 and the regulator valve 2. In this case, the determination unit 33 determines that the failure sign and the failure factor in the relationship between the hydraulic drive unit 5 and the regulator valve 2 are an increase in rattle or wear in the mechanical lever coupling that connects the hydraulic drive unit 5 to the regulator valve 2 (see FIG. 14). The alarm unit 34 outputs an alarm regarding the failure sign and the failure factor, and the display unit 35 displays the details of the alarm.

[0088] Next, a method 400 for monitoring a machine hydraulic control device according to this embodiment will be described with reference to FIG.

[0089] First, the opening degree of the hydraulic drive unit 5 (hydraulic drive unit opening degree) and the opening degree of the regulator valve 2 (regulator valve opening degree) are measured (step S401). Specifically, while the opening degree of the hydraulic drive unit 5 is increased from a fully closed state until the opening degree of the regulator valve 2 becomes fully open, the hydraulic drive unit opening degree detector 22 measures the opening degree of the hydraulic drive unit 5, and the regulator valve opening degree detector 20 and the regulator valve opening degree detector 21 measure the opening degree of the regulator valve 2.

[0090] Next, the relationship (corresponding to the fourth measurement relationship) between the measurement value of the opening of the hydraulic drive unit 5 and the measurement value of the opening of the regulator valve 2 is recorded in the recording unit 31 (step S402). Specifically, the recording unit 31 records the measurement value of the opening of the hydraulic drive unit 5 and the measurement value of the opening of the regulator valve 2 as time-series data so that they correspond to each other.

[0091] Next, a failure sign and a failure factor in the relationship between the hydraulic drive unit 5 and the regulating valve 2 are determined (step S403). Specifically, first, the determination unit 33 acquires the measurement value of the opening of the hydraulic drive unit 5 from the recording unit 31 in which the relationship (corresponding to the fourth measurement relationship) between the measurement value of the opening of the hydraulic drive unit 5 and the measurement value of the opening of the regulating valve 2 is recorded. The determination unit 33 also acquires the reference value of the opening of the hydraulic drive unit 5 from the setting unit 32 in which the relationship (corresponding to the fourth reference relationship) between the reference value of the opening of the hydraulic drive unit 5 and the reference value of the opening of the regulating valve 2 is set. The determination unit 33 also acquires from the setting unit 32 a setting value K10 (corresponding to the fourth setting value) for determining the relationship between the measurement value of the opening of the hydraulic drive unit 5 and the reference value of the opening of the hydraulic drive unit 5. Thereafter, the determination unit 33 compares the measurement value of the opening of the hydraulic drive unit 5 with the reference value of the opening of the hydraulic drive unit 5 based on the above-mentioned inequality using the setting value K10 (corresponding to the fourth setting value). By this comparison, the determining unit 33 determines the signs of failure and the cause of failure in the relationship between the hydraulic drive unit 5 and the regulator valve 2.

[0092] If the determination unit 33 determines that there are failure signs and failure factors (YES in step S404), the warning unit 34 outputs a warning regarding the failure signs and failure factors, and the display unit 35 displays details regarding the failure signs and failure factors (step S405) (see FIG. 14). On the other hand, if the determination unit 33 determines that there are no failure signs or failure factors (NO in step S404), this flow ends.

[0093] ((5) When monitoring the relationship between the starter 17 and the auxiliary pilot valve 16) Next, using FIGS. 10 and 11, we will explain the case (5), i.e., the case where the relationship between the starting device 17 and the auxiliary pilot valve 16 is monitored. FIG. 10 is an explanatory diagram for explaining monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment, with FIG. 10(a) being a graph illustrating normal operation and FIG. 10(b) being a graph illustrating a failure. FIG. 11 is a flowchart showing the mechanical hydraulic control device monitoring method 500 of this embodiment. In FIGS. 10(a) and 10(b), the horizontal axis represents the opening of the starting device 17 (starting device opening), and the vertical axis represents the opening of the auxiliary pilot valve 16 (auxiliary pilot valve opening). Note that this relationship is important because it can identify leakage of control oil supplied to the speed relay 11, increased rattle or wear at the connection (not shown) between the speed governing unit 14 and the rotary pilot valve 13, or a malfunction in the spring (not shown) of the speed governing unit 14.

[0094] In Figure 10(a), curve A APV1 Curve A in FIG. 10(a) shows the relationship between the opening of the starting device 17 and the opening of the auxiliary pilot valve 16 in a normal state. APV1 As shown in Fig. 1, when the opening degree of the starting device 17 is increased from the fully closed state, the starting device opening degree Z LLM1 The opening of the auxiliary pilot valve 16 starts to increase at . Thereafter, the opening of the auxiliary pilot valve 16 increases with the increase in the opening of the starting device 17, and the opening of the starting device X LLM1 The opening of the control valve 2 starts to open. After that, the opening of the auxiliary pilot valve 16 is maintained at a constant auxiliary pilot valve opening H APV1 Indicates the starter opening X LLM1 At the time ', the opening of the regulator valve 2 is fully opened. After that, the opening of the auxiliary pilot valve 16 increases as the opening of the starter 17 increases, and the opening of the starter Z LLM1 At this point, the auxiliary pilot valve 16 is fully open. APV1 corresponds to the relationship between the reference value of the opening degree of the starting device 17 and the reference value of the opening degree of the auxiliary pilot valve 16, and is set in the setting unit 32 (corresponding to the fifth reference relationship).

[0095] In Figure 10(b), curve AAPV2 is curve A APV1 The relationship between the opening of the starting device 17 and the opening of the auxiliary pilot valve 16 is shown in the figure, which is a curve that deviates from the curve A. APV2 Now, curve A APV1 The measured values ​​of the opening of the starting device 17 and the opening of the auxiliary pilot valve 16 are measured so that the curve A deviates from this curve. APV2 This curve A corresponds to the relationship between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the auxiliary pilot valve 16, and is recorded in the recording unit 31 (corresponding to the fifth measurement relationship). APV1 Curve A deviates from APV2 This is because the amount of control oil required to operate the speed relay 11 increases when, for example, there is leakage of control oil supplied from the auxiliary pilot valve 16 to the speed relay 11, when there is increased rattle or wear at the connection between the rotation regulating unit 14 and the rotary pilot valve 13, or when a malfunction occurs in the spring of the rotation regulating unit 14. Examples of control oil leakage here include leakage of control oil from the rod penetration part of the speed relay 11, leakage of control oil due to damage to the oil piping from the auxiliary pilot valve 16 to the speed relay 11, and leakage of control oil due to loosening of the oil piping connection. Also, an example of a malfunction of the spring of the rotation regulating unit 14 here includes deformation over time of the spring provided in the rotation regulating unit 14. Therefore, when the starter opening X reaches a point where the opening of the regulator valve 2 begins to increase, LLM1 The opening of the regulator valve 2 becomes fully open from the starter opening X. LLM1 Between the auxiliary pilot valve opening H APV2 Auxiliary pilot valve opening H APV1 It may be larger than that.

[0096] Therefore, when monitoring the relationship between the starting device 17 and the auxiliary pilot valve 16, the determination unit 33 determines the amount of change in the opening of the auxiliary pilot valve 16 (H APV2 -H APV1 ) and K11·H APV1 Specifically, the determination unit 33 compares the inequality (H APV2 -H APV1 )>K11·H APV1is satisfied, the malfunction signs and factors in the relationship between the starting device 17 and the auxiliary pilot 16 are determined. K11 here is a set value (corresponding to a fifth set value) for determining the relationship between the measured value of the opening of the auxiliary pilot valve 16 and the reference value of the opening of the auxiliary pilot valve 16. The set value K11 is, for example, a real number that satisfies the inequality 0≦K11≦1, and corresponds to the detection sensitivity when detecting a change in the measured value. The set value K11 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0097] Inequality (H APV2 -H APV1 )>K11·H APV1 is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the starting device 17 and the auxiliary pilot valve 16. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the starting device 17 and the auxiliary pilot valve 16 are a leakage of control oil supplied to the speed relay 11, increased wear at the connection between the rotation governing unit 14 and the rotary pilot valve 13, or a malfunction of the spring in the rotation governing unit 14 (see FIG. 14). Regarding the fault sign and the fault factor, the alarm unit 34 outputs an alarm, and the display unit 35 displays the details of the alarm.

[0098] Next, a method 500 for monitoring a machine hydraulic control device according to this embodiment will be described with reference to FIG.

[0099] First, the opening degree of the starting device 17 (starting device opening degree) and the opening degree of the auxiliary pilot valve 16 (auxiliary pilot valve opening degree) are measured (step S501). Specifically, while the opening degree of the starting device 17 is increased from a fully closed state until the opening degree of the auxiliary pilot valve 16 becomes fully open, the starting device opening degree detector 28 measures the opening degree of the starting device 17, and the auxiliary pilot valve opening degree detector 27 measures the opening degree of the auxiliary pilot valve 16.

[0100] Next, the relationship (corresponding to the fifth measurement relationship) between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the auxiliary pilot 16 is recorded in the recording unit 31 (step S502). Specifically, the recording unit 31 records the measurement value of the opening of the starting device 17 and the measurement value of the opening of the auxiliary pilot 16 as time-series data so that they correspond to each other.

[0101] Next, a failure sign and a failure factor in the relationship between the starting device 17 and the auxiliary pilot 16 are determined (step S503). Specifically, first, the determination unit 33 acquires the measurement value of the opening of the starting device 17 from the recording unit 31 in which the relationship (corresponding to the fifth measurement relationship) between the measurement value of the opening of the starting device 17 and the measurement value of the opening of the auxiliary pilot 16 is recorded. The determination unit 33 also acquires the reference value of the opening of the starting device 17 from the setting unit 32 in which the relationship (corresponding to the fifth reference relationship) between the reference value of the opening of the starting device 17 and the reference value of the opening of the auxiliary pilot 16 is set. The determination unit 33 also acquires from the setting unit 32 a setting value K11 (corresponding to the fifth setting value) for determining the relationship between the measurement value of the opening of the starting device 17 and the reference value of the opening of the starting device 17. Thereafter, the determination unit 33 compares the measurement value of the opening of the starting device 17 with the reference value of the opening of the starting device 17 based on an inequality using the above-mentioned setting value K11 (corresponding to the fifth setting value). By this comparison, the determining unit 33 determines the failure sign and the cause of the failure in the relationship between the starting device 17 and the auxiliary pilot 16.

[0102] If the determination unit 33 determines that there are failure signs and failure factors (YES in step S504), the warning unit 34 outputs a warning regarding the failure signs and failure factors, and the display unit 35 displays details regarding the failure signs and failure factors (step S505) (see FIG. 14). On the other hand, if the determination unit 33 determines that there are no failure signs or failure factors (NO in step S504), this flow ends.

[0103] ((6) When monitoring the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6) Finally, using Figures 12 and 13, we will explain case (6), i.e., the case where the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6 is monitored. Figure 12 is an explanatory diagram for explaining monitoring by the mechanical hydraulic control device monitoring device 30 of this embodiment, with Figure 12(a) being a graph illustrating normal operation and Figure 12(b) being a graph illustrating a failure. Figure 13 is a flowchart showing the mechanical hydraulic control device monitoring method 600 of this embodiment. In Figures 12(a) and 12(b), the horizontal axis represents the opening of the speed relay 11 (speed relay opening), and the vertical axis represents the opening of the regulator valve oil cylinder pilot valve 6 (regulator valve oil cylinder pilot valve opening). Note that this relationship is important because it can identify any leakage of control oil supplied to the hydraulic drive unit 5.

[0104] In Figure 12(a), curve A PV1 The curve A in FIG. 12(a) shows the relationship between the opening of the speed relay 11 and the opening of the regulator valve oil cylinder pilot valve 6 in the normal state. PV1 As shown in Figure 1, when the opening of the speed relay 11 is increased from the fully closed state, the speed relay opening Z SR1 The opening of the regulator valve oil cylinder pilot valve 6 starts to increase. After that, the opening of the regulator valve oil cylinder pilot valve 6 increases as the opening of the speed relay 11 increases, and the speed relay opening X SR1 The opening of the regulator valve 2 starts to increase. After that, the opening of the regulator valve oil cylinder pilot valve 6 is kept at a constant regulator valve oil cylinder pilot valve opening H PV1 Indicates the speed relay opening X SR1 At ´, the opening of the regulator valve 2 is fully open. After that, as the opening of the speed relay 11 increases, the opening of the regulator valve oil cylinder pilot valve 6 increases, and the speed relay opening Z SR1 At this point, the valve opening of the regulator valve oil cylinder pilot valve 6 is fully open. PV1 corresponds to the relationship between the reference value of the opening of the speed relay 11 and the reference value of the opening of the regulator valve oil cylinder pilot valve 6, and is set in the setting unit 32 (corresponding to the sixth reference relationship).

[0105] In Figure 12(b), curve A PV2 is curve A PV1The curve A shows the relationship between the opening of the speed relay 11 and the opening of the regulator valve oil cylinder pilot valve 6, which is a curve that deviates from the curve A. PV2 Now, curve A PV1 The measured value of the opening of the speed relay 11 and the measured value of the opening of the regulator valve oil cylinder pilot valve 6 are measured so that the curve A deviates from this curve. PV2 This corresponds to the relationship between the measured value of the opening of the speed relay 11 and the measured value of the opening of the regulator valve oil cylinder pilot valve 6, and is recorded in the recording unit 31 (corresponding to the sixth measurement relationship). PV1 Curve A deviates from PV2 This is because, for example, if there is a leakage of control oil supplied from the regulator valve oil cylinder pilot valve 6 to the hydraulic drive unit 5, the amount of control oil required to operate the hydraulic drive unit 5 increases. Examples of control oil leakage here include leakage of control oil from the rod penetration part of the hydraulic drive unit 5, leakage of control oil due to damage to the oil piping from the regulator valve oil cylinder pilot valve 6 to the hydraulic drive unit 5, leakage of control oil due to loosening of the oil piping connection, etc. For this reason, when the speed relay opening X SR1 The opening of the regulator valve 2 becomes fully open from the starter opening X. SR1 During this time, the regulator valve oil cylinder pilot valve opening H PV2 Adjustable valve oil cylinder pilot valve opening H PV1 It may be larger than that.

[0106] Therefore, when monitoring the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6, the determination unit 33 determines the amount of change in the opening of the regulator valve oil cylinder pilot valve 6 (H PV2 -H PV1 ) and K12·H PV1 Specifically, the determination unit 33 compares the inequality (H PV2 -H PV1 )>K12·H PV1By comparing whether or not the above relationship is satisfied, a fault sign and a fault cause in the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6 are determined. K12 here is a setting value (corresponding to a sixth setting value) for determining the relationship between the measured value of the regulator valve oil cylinder pilot valve 6 opening and the reference value of the regulator valve oil cylinder pilot valve 6 opening. The setting value K12 is, for example, a real number that satisfies the inequality 0≦K12≦1, and corresponds to the detection sensitivity when detecting changes in the measurement value. The setting value K12 may be configured to be changeable by the setting unit 32 so that the operator can adjust the detection sensitivity.

[0107] Inequality (H PV2 -H PV1 )>K12·H PV1 is satisfied, the determination unit 33 determines that there is a fault sign and a fault factor in the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6. In this case, the determination unit 33 determines that the fault sign and the fault factor in the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6 are a leak of control oil supplied to the hydraulic drive unit 5 (see FIG. 14). The alarm unit 34 outputs an alarm regarding this fault sign and fault factor, and the display unit 35 displays the details of the alarm.

[0108] Next, a method 600 for monitoring a machine hydraulic control device according to this embodiment will be described with reference to FIG.

[0109] First, the opening of speed relay 11 (speed relay opening) and the opening of regulator valve cylinder pilot valve 6 (regulator valve cylinder pilot valve opening) are measured (step S601). Specifically, while the opening of speed relay 11 is increased from a fully closed state until the opening of regulator valve cylinder pilot valve 6 becomes fully open, speed relay opening detector 25 measures the opening of speed relay 11, and regulator valve cylinder pilot valve opening detector 24 measures the opening of regulator valve cylinder pilot valve 6.

[0110] Next, the relationship (corresponding to the sixth measurement relationship) between the measurement value of the opening of the speed relay 11 and the measurement value of the opening of the regulator valve oil cylinder pilot valve 6 is recorded in the recording unit 31 (step S602). Specifically, the recording unit 31 records the measurement value of the opening of the speed relay 11 and the measurement value of the opening of the regulator valve oil cylinder pilot valve 6 as time-series data so that they correspond to each other.

[0111] Next, the failure signs and failure factors in the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6 are determined (step S603). Specifically, first, the determination unit 33 acquires the measurement value of the opening of the speed relay 11 from the recording unit 31 in which the relationship (corresponding to the sixth measurement relationship) between the measurement value of the opening of the speed relay 11 and the measurement value of the opening of the regulator valve oil cylinder pilot valve 6 is recorded. The determination unit 33 also acquires the reference value of the opening of the speed relay 11 from the setting unit 32 in which the relationship (corresponding to the sixth reference relationship) between the reference value of the opening of the speed relay 11 and the reference value of the opening of the regulator valve oil cylinder pilot valve 6 is set. The determination unit 33 also acquires from the setting unit 32 a setting value K12 (corresponding to the sixth setting value) for determining the relationship between the measurement value of the opening of the speed relay 11 and the reference value of the opening of the speed relay 11. Thereafter, the determination unit 33 compares the measured value of the opening of the speed relay 11 with the reference value of the opening of the speed relay 11 based on an inequality using the above-mentioned set value K12 (corresponding to the sixth set value). From this comparison, the determination unit 33 determines the signs of failure and the cause of failure in the relationship between the speed relay 11 and the regulator valve oil cylinder pilot valve 6.

[0112] If the determination unit 33 determines that there are failure signs and failure factors (YES in step S604), the warning unit 34 outputs a warning regarding the failure signs and failure factors, and the display unit 35 displays details regarding the failure signs and failure factors (step S605) (see FIG. 14). On the other hand, if the determination unit 33 determines that there are no failure signs or failure factors (NO in step S604), this flow ends.

[0113] (Mechanical hydraulic control device monitoring method 100 combining cases (1) to (6)) The above has described the cases (1) to (6) for determining failure signs and failure causes by the mechanical hydraulic control device monitoring device 30 according to this embodiment. The determination of failure signs and failure causes by this mechanical hydraulic control device monitoring device 30 may also be a combination of these cases (1) to (6). For example, the determination unit 33 may simultaneously determine failure signs and failure causes for each measurement object based on each measurement value measured for each measurement object and the corresponding reference values ​​and setting values ​​(based on each determination condition shown in FIG. 14).

[0114] In this case, if the judgment unit 33 determines that there is a failure sign or failure factor for any one of the failure signs and failure factors shown in Figure 14, the alarm unit 34 outputs an alarm regarding the failure sign and failure factor, and the display unit 35 displays details regarding the failure sign and failure factor.

[0115] Furthermore, if the judgment unit 33 determines that there are failure signs and failure factors for two or more of the failure signs and failure factors shown in Figure 14 and that there are no overlapping failure signs and failure factors, the alarm unit 34 outputs an alarm regarding those failure signs and failure factors, and the display unit 35 displays the details regarding those failure signs and failure factors.

[0116] 14, if the determination unit 33 determines that two or more of the failure signs and failure factors are present and determines that there are overlapping failure signs and failure factors, the warning unit 34 outputs a warning about the overlapping failure signs and failure factors, and the display unit 35 displays details about the overlapping failure signs and failure factors. The warning unit 34 may output a warning about only the overlapping failure signs and failure factors, or the display unit 35 may display details about only the overlapping failure signs and failure factors. The warning unit 34 may also warn about other failure signs and failure factors along with the overlapping failure signs and failure factors, but may emphasize the overlapping failure signs and failure factors, or the display unit 35 may display other failure signs and failure factors along with the overlapping failure signs and failure factors, but may emphasize the overlapping failure signs and failure factors. For example, the alarm unit 34 may be configured to display an alarm about duplicated failure signs and failure factors at the top of the list, or to highlight the duplicated failure signs and failure factors using different colors, fonts, etc., and the display unit 35 may be configured to display duplicated failure signs and failure factors at the top of the list, or to highlight the duplicated failure signs and failure factors using different colors, fonts, etc.

[0117] As described above, according to this embodiment, it is possible to know the signs of failure and the causes of failure before a failure actually occurs in any of the mechanical hydraulic control device 10, the hydraulic drive device 4, and the regulating valve 2. Therefore, appropriate preparations can be made to find solutions to the signs of failure and the causes of failure before the power plant is shut down, thereby shortening or preventing the shutdown period of the power plant.

[0118] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, modifications, and combinations can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0119] 1...Mechanical hydraulic control device monitoring system, 2...Adjustment valve, 3...Drive mechanism, 4...Hydraulic drive device, 5...Hydraulic drive unit, 6...Adjustment valve oil cylinder pilot valve, 10...Mechanical hydraulic control device, 11...Speed ​​relay, 12...Rotary pilot valve sleeve, 13...Rotary pilot valve, 14...Speed ​​control rotation unit, 15...Governor drive gear device, 16...Auxiliary pilot valve, 17...Starting device, 18...Synchronizing device, 20...Adjustment valve opening detector, 21...Adjustment valve opening detector, 22...Hydraulic drive driving part opening detector, 23...hydraulic driving part oil pressure detector, 24...regulating valve oil cylinder pilot valve opening detector, 25...speed relay opening detector, 26...speed relay oil pressure detector, 27...auxiliary pilot valve opening detector, 28...starting device opening detector, 29...synchronizing device opening detector, 30...mechanical hydraulic control device monitoring device, 31...recording unit, 32...setting unit, 33...judgment unit, 34...alarm unit, 35...display unit, 36...operation unit, 100...mechanical hydraulic control device monitoring system.

Claims

1. a hydraulic drive unit including a regulator oil cylinder pilot valve that adjusts the amount of control oil supplied to the hydraulic drive unit to drive the hydraulic drive unit that adjusts the valve opening of the steam valve; a mechanical hydraulic control device including an auxiliary pilot valve that adjusts the amount of control oil supplied to the speed relay to drive the speed relay that adjusts the valve opening of the regulating valve oil cylinder pilot valve, a synchronizer that adjusts the flow rate of the control oil flowing through a rotary pilot valve sleeve that connects the speed relay and the auxiliary pilot valve, and a starter that adjusts the valve opening of the auxiliary pilot valve; A machine hydraulic control device monitoring device that monitors a recording unit that records at least one of a first measurement relationship representing the relationship between the opening of the starting device and at least one of the opening and hydraulic pressure of the speed relay, a second measurement relationship representing the relationship between the opening of the synchronizer and at least one of the opening and hydraulic pressure of the speed relay, a third measurement relationship representing the relationship between the opening of the speed relay and at least one of the opening or hydraulic pressure of the hydraulic drive unit, a fourth measurement relationship representing the relationship between the opening of the hydraulic drive unit and the opening of the steam valve, a fifth measurement relationship representing the relationship between the opening of the starting device and the opening of the auxiliary pilot valve, and a sixth measurement relationship representing the relationship between the opening of the speed relay and the opening of the regulating valve oil cylinder pilot valve; a determination unit that determines a failure predictor and a failure factor in at least one of the mechanical hydraulic control device, the hydraulic drive device, and the steam valve based on at least one of a first set value for determining a relationship between the opening of the starting device and a reference value of the opening of the starting device, a second set value for determining a relationship between the opening of the synchronizer and a reference value of the opening of the synchronizer, a third set value for determining a relationship between the opening of the speed relay and a reference value of the opening of the speed relay, a fourth set value for determining a relationship between the opening of the hydraulic drive unit and a reference value of the opening of the hydraulic drive unit, a fifth set value for determining a relationship between the opening of the auxiliary pilot valve and a reference value of the opening of the auxiliary pilot valve, and a sixth set value for determining a relationship between the opening of the regulator valve cylinder pilot valve and a reference value of the opening of the regulator valve cylinder pilot valve; A machine hydraulic control device monitoring device comprising:

2. 2. The machine hydraulic control device monitoring device according to claim 1, further comprising a setting unit that sets at least one of a first reference relationship representing the relationship between a reference value of the opening of the starting device and a reference value of at least one of the opening or hydraulic pressure of the speed relay; a second reference relationship representing the relationship between a reference value of the opening of the synchronizer and a reference value of at least one of the opening or hydraulic pressure of the speed relay; a third reference relationship representing the relationship between a reference value of the opening of the speed relay and a reference value of at least one of the opening or hydraulic pressure of the hydraulic drive unit; a fourth reference relationship representing the relationship between a reference value of the opening of the hydraulic drive unit and a reference value of the opening of the steam valve; a fifth reference relationship representing the relationship between a reference value of the opening of the starting device and a reference value of the opening of the auxiliary pilot valve; and a sixth reference relationship representing the relationship between a reference value of the opening of the speed relay and a reference value of the opening of the regulating valve oil cylinder pilot valve.

3. 3. The machine hydraulic control device monitoring device according to claim 1, further comprising an alarm unit that outputs an alarm regarding the failure sign and the cause of the failure.

4. 3. The machine hydraulic control device monitoring device according to claim 1, further comprising a display unit that displays details relating to the failure sign and the cause of the failure.

5. a hydraulic drive unit including a regulator oil cylinder pilot valve that adjusts the amount of control oil supplied to the hydraulic drive unit to drive the hydraulic drive unit that adjusts the valve opening of the steam valve; a mechanical hydraulic control device including an auxiliary pilot valve that adjusts the amount of control oil supplied to the speed relay to drive the speed relay that adjusts the valve opening of the regulating valve oil cylinder pilot valve, a synchronizer that adjusts the flow rate of the control oil flowing through a rotary pilot valve sleeve that connects the speed relay and the auxiliary pilot valve, and a starter that adjusts the valve opening of the auxiliary pilot valve; The machine hydraulic control device monitoring device according to claim 1; A machine hydraulic control device monitoring system comprising:

6. a hydraulic drive unit including a regulator oil cylinder pilot valve that adjusts the amount of control oil supplied to the hydraulic drive unit to drive the hydraulic drive unit that adjusts the valve opening of the steam valve; a mechanical hydraulic control device including an auxiliary pilot valve that adjusts the amount of control oil supplied to the speed relay to drive the speed relay that adjusts the valve opening of the regulating valve oil cylinder pilot valve, a synchronizer that adjusts the flow rate of the control oil flowing through a rotary pilot valve sleeve that connects the speed relay and the auxiliary pilot valve, and a starter that adjusts the valve opening of the auxiliary pilot valve; A method for monitoring a machine hydraulic control device, comprising: a step of recording at least one of a first measurement relationship representing the relationship between the opening of the starting device and at least one of the opening and hydraulic pressure of the speed relay, a second measurement relationship representing the relationship between the opening of the synchronizer and at least one of the opening and hydraulic pressure of the speed relay, a third measurement relationship representing the relationship between the opening of the speed relay and at least one of the opening or hydraulic pressure of the hydraulic drive unit, a fourth measurement relationship representing the relationship between the opening of the hydraulic drive unit and the opening of the steam valve, a fifth measurement relationship representing the relationship between the opening of the starting device and the opening of the auxiliary pilot valve, and a sixth measurement relationship representing the relationship between the opening of the speed relay and the opening of the regulating valve oil cylinder pilot valve; determining a failure symptom and a failure factor in at least one of the mechanical hydraulic control device, the hydraulic drive device, and the steam valve based on at least one of a first set value for determining a relationship between the opening of the starting device and a reference value of the opening of the starting device, a second set value for determining a relationship between the opening of the synchronizer and a reference value of the opening of the synchronizer, a third set value for determining a relationship between the opening of the speed relay and a reference value of the opening of the speed relay, a fourth set value for determining a relationship between the opening of the hydraulic drive unit and a reference value of the opening of the hydraulic drive unit, a fifth set value for determining a relationship between the opening of the auxiliary pilot valve and a reference value of the opening of the auxiliary pilot valve, and a sixth set value for determining a relationship between the opening of the regulator valve cylinder pilot valve and a reference value of the opening of the regulator valve cylinder pilot valve; A method for monitoring a machine hydraulic control device, comprising:

7. 7. The method for monitoring a machine hydraulic control device according to claim 6, further comprising the step of setting at least one of a first reference relationship representing the relationship between a reference value of the opening of the starting device and a reference value of at least one of the opening or hydraulic pressure of the speed relay; a second reference relationship representing the relationship between a reference value of the opening of the synchronizer and a reference value of at least one of the opening or hydraulic pressure of the speed relay; a third reference relationship representing the relationship between a reference value of the opening of the speed relay and a reference value of at least one of the opening or hydraulic pressure of the hydraulic drive unit; a fourth reference relationship representing the relationship between a reference value of the opening of the hydraulic drive unit and a reference value of the opening of the steam valve; a fifth reference relationship representing the relationship between a reference value of the opening of the starting device and a reference value of the opening of the auxiliary pilot valve; and a sixth reference relationship representing the relationship between a reference value of the opening of the speed relay and a reference value of the opening of the regulating valve oil cylinder pilot valve.

8. 8. The method for monitoring a machine hydraulic control device according to claim 6, further comprising the step of issuing an alarm about the failure sign and the cause of the failure.

9. 8. The method for monitoring a machine hydraulic control device according to claim 6, further comprising the step of displaying the failure sign and the cause of the failure.

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