Debugging method of high-speed hydraulic dynamometer

Abstract

The present application relates to a kind of high-speed hydraulic dynamometer debugging method, through static debugging and verification, ensure high-speed hydraulic dynamometer operation and test preparedness;Through dynamic machine operation obtains or verifies high-speed hydraulic dynamometer operating range, i.e. the characteristic such as envelope curve;Dynamic machine includes speed verification, torque verification and power verification;After machine test operation, hydraulic dynamometer appearance and internal flow passage inspection.The debugging method of the present application can provide reasonable working range for original motor and hydraulic dynamometer joint debugging, and ensure the operation safety of original motor and hydraulic dynamometer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, in particular to a debugging method of a high-speed hydraulic dynamometer. BACKGROUND

[0002] With the development of modern science and technology, the high-speed hydraulic dynamometer is an essential power measuring and consuming device for verifying the performance of a gas turbine. As a key supporting device for gas turbine test, it has the advantages of high measuring accuracy, sensitive response, strong running capacity, good maintainability, etc., and has become an essential means for the development, durability test and performance test after repair of an aero-engine and a marine gas turbine.

[0003] At present, there is no standardized debugging method for the hydraulic dynamometer in the industry. Usually, the debugging is carried out for several parts according to the experience of the operator, and it is difficult to form a complete debugging scheme. SUMMARY

[0004] In view of the above-mentioned shortcomings in the prior art, the present application provides a debugging method of a high-speed hydraulic dynamometer with a reasonable structure, which discloses a debugging method for the first time running of a high-power high-speed hydraulic dynamometer, so as to better verify the characteristics of the hydraulic dynamometer and avoid risks in the acceptance of the hydraulic dynamometer.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A debugging method of a high-speed hydraulic dynamometer, comprising the following steps:

[0007] Step 1: install a measurement and control system, and carry out static debugging and static power verification of the measurement and control system to ensure the test accuracy of the hydraulic dynamometer and ensure that each system meets the operating conditions;

[0008] Step 2: carry out a hydraulic dynamometer running test under a small load, gradually increase the hydraulic dynamometer from a normal speed range to a design maximum speed of the hydraulic dynamometer or a limit speed of a prime mover, and then reduce the hydraulic dynamometer speed to a minimum stable speed range that the hydraulic dynamometer can reach, so as to test the running characteristics of the hydraulic dynamometer in the full speed range;

[0009] Step 3: based on the theoretical contour line of the hydraulic dynamometer, according to the power characteristics of the prime mover-hydraulic dynamometer, carry out a hydraulic dynamometer performance test to obtain the speed-power characteristics of the hydraulic dynamometer;

[0010] Step 4: according to the characteristics of the prime mover, select multiple speeds to carry out a hydraulic dynamometer torque absorption maximum stable point running test to verify the maximum torque stable line of the hydraulic dynamometer contour line;

[0011] Step 5: According to the characteristics of the prime mover, the minimum stable point operation test of the water dynamometer torque absorption is carried out under the premise of safety to verify the minimum torque stability line of the water dynamometer envelope curve;

[0012] Step 6: After the performance test, the hole detector or disassembly inspection is carried out to ensure that the parts of the water dynamometer are intact after the extreme operation, and the safety of the subsequent operation is ensured.

[0013] As a further improvement of the above technical solution:

[0014] In step 1, the static debugging of the measurement and control system of the installed water dynamometer is carried out, including wiring inspection and corresponding record; after the static debugging is completed, the water dynamometer auxiliary systems are opened, and the static torque and speed of the water dynamometer are verified according to the water dynamometer operation rules, and the corresponding records are made to ensure the accuracy of the torque measurement and speed measurement of the water dynamometer.

[0015] In steps 3 to 6, the water dynamometer absorption envelope curve logarithmic coordinate system is established with speed as the horizontal coordinate and power as the vertical coordinate; the water dynamometer full water line, maximum absorption power, highest speed and lowest stable working line are used to obtain the envelope curve reflecting the working interval of the water dynamometer.

[0016] In step 2, the power remains unchanged, the water quantity is reduced, and the speed of the water dynamometer is increased from point a to point b on the envelope curve; at this time, the water dynamometer is in the lowest stable water quantity operating state, and the operating conditions of the water dynamometer at each operating point and the stability of each system are tested.

[0017] In step 2, the water quantity is increased, the power remains unchanged, and the speed of the water dynamometer is decreased from point a to point c on the envelope curve; at this time, the water dynamometer is in the full water state; the operating conditions of the water dynamometer at each operating point and the stability of each system are tested.

[0018] In step 3, under the condition that the speed of the prime mover is allowed, the water dynamometer envelope curve speed boundary test is carried out, and a1 to e1 points under different power near the speed critical line are selected for test to verify the speed performance of the water dynamometer.

[0019] In step 4, under the condition that the power of the prime mover is allowed, the water dynamometer maximum absorption torque boundary test is carried out, and a2 to e2 points under different power and speed near the full water critical line are selected for test to verify the maximum absorption torque performance of the water dynamometer.

[0020] In step 4, under the condition that the power of the prime mover is allowed, the water dynamometer maximum absorption torque boundary test is carried out, and a2 to e2 points under different power and speed near the full water critical line are selected for test to verify the maximum absorption torque performance of the water dynamometer. In step 4, under the condition that the power of the prime mover is allowed, the water dynamometer maximum absorption torque boundary test is carried out, and a2 to e2 points under different power and speed near the full water critical line are selected for test to verify the maximum absorption torque performance of the water dynamometer.

[0021] In step 5, according to the characteristics of the prime mover, the minimum absorption power stable line operation test of the hydraulic dynamometer is carried out under the premise of safety, and a4 points to e4 points near the minimum stable power line under different speeds are selected for test to verify the minimum power stable line of the hydraulic dynamometer.

[0022] In step 6, after completing the above steps, after the hydraulic dynamometer is stopped, the appearance and internal flow channel of the hydraulic dynamometer are checked, and it is checked that whether the hydraulic dynamometer has abnormal conditions such as water leakage, oil leakage and excessive wear in appearance; the integrity of the rotor, stator and other internal flow channel components of the hydraulic dynamometer is checked, and the corresponding inspection records are made.

[0023] The beneficial effects of the present application are as follows:

[0024] (1) The present application provides a debugging method for high-power high-speed hydraulic dynamometer, which ensures the operation and test preparation of high-speed hydraulic dynamometer through static debugging and verification; secondly, through dynamic matching, such as speed verification, torque verification and power verification, the running working interval of high-speed hydraulic dynamometer is obtained, or the characteristics of high-speed hydraulic dynamometer running working interval are verified, and the running working interval is embodied by the contour line; moreover, the debugging method provided by the present application can provide reasonable working interval for the joint debugging of the prime mover and the hydraulic dynamometer, and ensure the safety of the unit and the hydraulic dynamometer.

[0025] (2) The present application establishes the log coordinate system of the hydraulic dynamometer characteristic contour line, and the hydraulic dynamometer characteristics and performance verification test points are directly shown in the log coordinate system by images, which is convenient for paying attention to the running boundary of the hydraulic dynamometer in the debugging process, and improving the safety and stability of the equipment and the matching test system.

[0026] (3) According to the actual situation, the hydraulic dynamometer is set to open-loop control mode, which can better realize the verification of the hydraulic dynamometer characteristics, reduce the speed fluctuation caused by parameter mismatching, and avoid the harm of automatic control overshoot to the prime mover and the hydraulic dynamometer.

[0027] (4) In the verification of speed, torque and power, the verification points are set near the theoretical contour line, which can ensure sufficient verification of the performance of the hydraulic dynamometer, provide favorable buffer for the limit operation of the hydraulic dynamometer, and improve the safety and stability of the equipment of the matching test system. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The present application is a hydraulic dynamometer theoretical contour line.

[0029] Figure 2 The present application is a hydraulic dynamometer running schematic diagram, in which the horizontal coordinate is speed and the vertical coordinate is power.

[0030] Figure 3 This is a schematic diagram of the speed boundary test operation of the hydraulic dynamometer of the present invention.

[0031] Figure 4 This is a schematic diagram of the maximum absorbed torque boundary test operation of the hydraulic dynamometer of the present invention.

[0032] Figure 5 This is a schematic diagram of the maximum power boundary test operation of the hydraulic dynamometer of the present invention.

[0033] Figure 6 This is a schematic diagram of the minimum absorbed power stability line operation test of the hydraulic dynamometer of the present invention. Detailed Implementation

[0034] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] like Figures 1-6 As shown, the debugging method of the high-speed hydraulic dynamometer in this embodiment includes the following steps:

[0036] Step 1: Install the measurement and control system, and perform static debugging and static power verification on the measurement and control system to ensure the testing accuracy of the hydraulic dynamometer and to ensure that each system meets the operating conditions;

[0037] Step 2: Conduct a hydraulic dynamometer operation test under low load conditions. Gradually increase the hydraulic dynamometer speed from the normal speed range to the maximum design speed of the hydraulic dynamometer or the limit speed of the prime mover, and then reduce the speed of the hydraulic dynamometer to the lowest stable speed range that the hydraulic dynamometer can reach, in order to test the operating characteristics of the hydraulic dynamometer in the full speed range.

[0038] Step 3: Based on the theoretical envelope of the hydraulic dynamometer, and according to the power characteristics of the prime mover-hydraulic dynamometer, conduct a performance test of the hydraulic dynamometer to obtain the speed-power characteristics of the hydraulic dynamometer.

[0039] Step 4: Based on the characteristics of the prime mover, select multiple speeds and conduct a test at the maximum stable point of torque absorption of the hydraulic dynamometer to verify the maximum torque stability line of the hydraulic dynamometer envelope.

[0040] Step 5: Based on the characteristics of the prime mover, and under the premise of ensuring safety, conduct a minimum stable point operation test of the hydraulic dynamometer torque absorption to verify the minimum torque stability line of the hydraulic dynamometer envelope.

[0041] Step 6: After the performance test, conduct a borehole inspection or disassembly to ensure that all parts of the hydraulic dynamometer are intact after extreme operation, thus ensuring safe operation in the future.

[0042] In step 1, the static debugging of the measuring and control system of the installed hydraulic dynamometer is carried out, including the connection checking and the corresponding record; after the static debugging is completed, the various auxiliary systems of the hydraulic dynamometer are opened, and the static torque and rotating speed of the hydraulic dynamometer are checked according to the operation regulation of the hydraulic dynamometer, and the corresponding record is made, so as to ensure the accuracy of the torque measurement and the rotating speed measurement of the hydraulic dynamometer.

[0043] In steps 3 to 6, the power is taken as the vertical coordinate and the rotating speed is taken as the horizontal coordinate to establish the log coordinate system of the power contour line of the hydraulic dynamometer; the power contour line for reflecting the working range of the hydraulic dynamometer is obtained according to the full water line, the maximum absorption power, the highest rotating speed and the lowest stable working line of the hydraulic dynamometer.

[0044] In step 2, the power is kept unchanged, the water quantity is reduced, and the rotating speed of the hydraulic dynamometer is increased from the point a to the point b on the power contour line; at this time, the hydraulic dynamometer is in the lowest stable water quantity operating state, and the operating conditions of the hydraulic dynamometer at various operating points and the stability of various systems are tested.

[0045] In step 2, the water quantity is increased, the power is kept unchanged, the rotating speed of the hydraulic dynamometer is decreased from the point a to the point c on the power contour line; at this time, the hydraulic dynamometer is in the full water state; the operating conditions of the hydraulic dynamometer at various operating points and the stability of various systems are tested.

[0046] In step 3, the rotating speed boundary test of the power contour line of the hydraulic dynamometer is carried out under the condition that the rotating speed of the prime mover is allowed, the points a1 to e1 under different powers close to the rotating speed critical line are selected for the test, and the rotating speed performance of the hydraulic dynamometer is verified.

[0047] In step 4, the maximum absorption torque boundary test of the hydraulic dynamometer is carried out under the condition that the power of the prime mover is allowed, the points a2 to e2 under different powers and rotating speeds close to the full water critical line are selected for the test, and the maximum absorption torque performance of the hydraulic dynamometer is verified.

[0048] In step 4, the maximum absorption torque boundary test of the hydraulic dynamometer is carried out under the condition that the power of the prime mover is allowed, the points a2 to e2 under different powers and rotating speeds close to the full water critical line are selected for the test, and the maximum absorption torque performance of the hydraulic dynamometer is verified.

[0049] In step 5, the minimum absorption power stable line operating test of the hydraulic dynamometer is carried out under the condition that the safety is ensured according to the characteristics of the prime mover, the points a4 to e4 close to the minimum stable power line under different rotating speeds are selected for the test, and the minimum power stable line of the hydraulic dynamometer is verified.

[0050] In step 6, after the above steps are completed and the hydraulic dynamometer is stopped, the hydraulic dynamometer is checked in appearance and inside flow channel, and it is checked and confirmed that there is no abnormal condition such as water leakage, oil leakage and excessive wear in appearance of the hydraulic dynamometer; the completeness of the rotor, stator and other internal flow channel components inside the hydraulic dynamometer is checked, and corresponding checking records are made.

[0051] The specific working process and principle of the embodiment are as follows:

[0052] First, the installed measurement and control system is statically debugged and statically power verified to ensure that the hydraulic dynamometer test precision and each system meet the operation conditions; the static debugging of the installed hydraulic dynamometer includes the connection checking, and corresponding records are made. After the static debugging is completed, each accessory system of the hydraulic dynamometer is opened, and the static torque and speed of the hydraulic dynamometer are verified according to the hydraulic dynamometer operation regulation, and corresponding records are made to ensure the accuracy of the torque measurement and speed measurement of the hydraulic dynamometer.

[0053] As shown in Figure 1 , it is the theoretical envelope curve of the hydraulic dynamometer. In the figure, the speed is taken as the horizontal coordinate and the power is taken as the vertical coordinate, and the logarithmic coordinate system of the hydraulic dynamometer envelope curve is established, that is, the logarithmic coordinate system of the hydraulic dynamometer during operation. The full water line of the hydraulic dynamometer, that is, the maximum torque absorption line, the maximum absorption power, the highest speed and the lowest stable operation line are taken to obtain the hydraulic dynamometer envelope curve, that is, the working interval of the hydraulic dynamometer.

[0054] Figure 2 In the hydraulic dynamometer debugging method, under the condition that the normal power of the prime mover is unchanged, the speed of the hydraulic dynamometer is adjusted and the schematic diagram of the hydraulic dynamometer running at each speed is shown. The hydraulic dynamometer running test is carried out under small load condition, the hydraulic dynamometer is gradually increased from the normal speed interval to the highest speed of the hydraulic dynamometer or the limit speed of the prime mover, and then the speed of the hydraulic dynamometer is reduced to the lowest stable speed interval that the hydraulic dynamometer can reach, so as to test the running characteristics of the hydraulic dynamometer in the whole speed interval; the specific speed interval adjustment is as follows: under the condition that the speed of the prime mover is allowed, as shown in Figure 2 , the water inlet amount is reduced under the condition that the power of the prime mover is unchanged, the speed of the hydraulic dynamometer is increased from point a to point b on the envelope curve, at this time the hydraulic dynamometer is operated at the lowest stable water amount or the highest rated speed of the hydraulic dynamometer, and then the speed of the hydraulic dynamometer is reduced to point c, the running condition of the hydraulic dynamometer at each running point and the stability of each system are tested, at this time, the speed, absorption power, vibration index of the hydraulic dynamometer, bearing, lubricating oil system and water supply system are all normal, if there is speed fluctuation, power absorption instability, vibration index exceeding the limit, bearing temperature exceeding the limit and other abnormal conditions, the test should be stopped in time, and the reasons for the fault are checked.

[0055] Figure 3For the water power tester debugging method, the water power tester speed boundary test operation schematic diagram. Based on the water power tester theoretical envelope, according to the power characteristics of the prime mover-water power tester, the water power tester performance test is carried out, and the water power tester speed-power characteristic is obtained;The specific adjustment process is as follows: as shown in a1 point to e1 point, in the case of allowing the speed of the prime mover, the water power tester envelope speed boundary test is carried out, and a1 point to e1 point under different power close to the speed critical line is selected for test to verify the speed performance of the water power tester. Figure 3

[0056] Figure 4 For the water power tester debugging method, the water power tester maximum absorption torque boundary test operation schematic diagram, that is, the full water boundary test operation schematic diagram. According to the characteristics of the prime mover, a plurality of speeds are selected, and the water power tester torque absorption maximum stable point operation test is carried out to verify the maximum torque stable line of the water power tester envelope;The specific verification process is as follows: in the case of allowing the power of the prime mover, the water power tester maximum absorption torque boundary test, that is, the full water boundary test is carried out;As shown in a2 point to e2 point, different power and speed close to the full water critical line are selected for test to verify the maximum absorption torque performance of the water power tester and the performance under the full water state. At this time, the water power tester speed, absorption power, vibration index and water power tester bearing, oil system and water supply system are normal, if the water power tester speed fluctuation, power absorption instability, vibration index exceeds the standard, bearing temperature overrun and other abnormal conditions occur, the test should be stopped in time and the cause of the fault is investigated. Figure 4

[0057] Figure 5 For the water power tester debugging method, the water power tester maximum power boundary test operation schematic diagram. According to the characteristics of the prime mover, under the premise of safety, the water power tester torque absorption minimum stable point operation test is carried out to verify the minimum torque stable line of the water power tester envelope;The specific verification process is as follows: in the case of allowing the power and speed of the prime mover, the water power tester maximum power boundary test is carried out, as shown in a3 point to c3 point, a3 point to c3 point under different speed close to the maximum power line is selected for test to verify the performance of the water power tester under the maximum absorption power state. At this time, the water power tester speed, absorption power, vibration index and water power tester bearing, oil system and water supply system are normal, if the water power tester speed fluctuation, power absorption instability, vibration index exceeds the standard, bearing temperature overrun and other abnormal conditions occur, the test should be stopped in time and the cause of the fault is investigated. Figure 5

[0058] Figure 6 ​​​For the hydraulic dynamometer debugging method, the hydraulic dynamometer minimum absorption power stability line test operation schematic diagram. According to the prime mover characteristics, under the premise of safety, the minimum absorption power stability line operation test of the hydraulic dynamometer is carried out, as shown in Figure 6 The a4 point to the e4 point higher than the minimum stable power line under different rotating speeds is selected for test, and the minimum power stability line of the hydraulic dynamometer is verified. At this time, the hydraulic dynamometer rotating speed, absorption power, vibration index and hydraulic dynamometer bearing, oil system and water supply system are normal, if the hydraulic dynamometer rotating speed fluctuation, power absorption instability, vibration index exceeds the standard, bearing temperature overrun and other abnormal conditions occur, the test should be stopped in time, and the reason of the fault is checked.

[0059] After the above steps are completed, after the hydraulic dynamometer is stopped, the appearance and internal flow channel of the hydraulic dynamometer are checked, and it is checked that whether the hydraulic dynamometer has abnormal conditions such as water leakage, oil leakage and excessive wear on the appearance; The integrity of the rotor, stator and other internal flow channel components of the hydraulic dynamometer is checked, and the corresponding inspection record is made.

[0060] In summary, combined with Figures 2-6 Under the condition that the power and rotating speed of the prime mover are allowed, the specific steps of the hydraulic dynamometer envelope line debugging and verification include the following three general steps:

[0061] (1) Through static debugging and checking, the running and testing preparation of the high-speed hydraulic dynamometer is ensured;

[0062] (2) The running working interval of the high-speed hydraulic dynamometer, i.e. the envelope line and other characteristics, is obtained or verified through dynamic machine matching operation; Dynamic machine matching includes rotating speed verification, torque verification and power verification;

[0063] (3) The appearance and internal flow channel of the hydraulic dynamometer after the machine matching test operation are checked.

[0064] The debugging method of the present application can provide a reasonable working interval for the prime mover and the hydraulic dynamometer joint debugging, and ensure the safety of the unit and the hydraulic dynamometer.

[0065] The above description is an explanation of the present application, not a limitation of the invention, the scope of the present application is referred to the claims, within the protection scope of the present application, any form of modification can be made.

Claims

1. A method for debugging a high-speed hydraulic dynamometer, characterized in that, To provide a reasonable operating range for the joint commissioning of the prime mover and hydraulic dynamometer, the following steps are included: Step 1: Install the measurement and control system, and perform static debugging and static power verification on the measurement and control system to ensure the testing accuracy of the hydraulic dynamometer and to ensure that each system meets the operating conditions; Step 2: Conduct a hydraulic dynamometer operation test under low load conditions. Gradually increase the hydraulic dynamometer speed from the normal speed range to the maximum design speed of the hydraulic dynamometer or the limit speed of the prime mover, and then reduce the speed of the hydraulic dynamometer to the lowest stable speed range that the hydraulic dynamometer can reach, in order to test the operating characteristics of the hydraulic dynamometer in the full speed range. Step 3: Based on the theoretical envelope of the hydraulic dynamometer, and according to the power characteristics of the prime mover-hydraulic dynamometer, conduct a performance test of the hydraulic dynamometer to obtain the speed-power characteristics of the hydraulic dynamometer. Step 4: Based on the characteristics of the prime mover, select multiple speeds and conduct a test at the maximum stable point of torque absorption of the hydraulic dynamometer to verify the maximum torque stability line of the hydraulic dynamometer envelope. Step 5: Based on the characteristics of the prime mover, and under the premise of ensuring safety, conduct a minimum stable point operation test of the hydraulic dynamometer torque absorption to verify the minimum torque stability line of the hydraulic dynamometer envelope. Step 6: After the performance test, conduct a borehole inspection or disassembly to ensure that all parts of the hydraulic dynamometer are intact after extreme operation, and to ensure the safety of subsequent operation. When verifying speed, torque, and power, the verification point is set near the theoretical envelope.

2. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 1, the static debugging of the measurement and control system of the hydraulic dynamometer after installation is carried out, including wiring checks, and corresponding records are made. After static debugging is completed, turn on all auxiliary systems of the hydraulic dynamometer and perform static torque and speed verification of the hydraulic dynamometer according to the hydraulic dynamometer operating procedures, and make corresponding records to ensure the accuracy of torque and speed measurement of the hydraulic dynamometer.

3. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In steps 3 to 6, a logarithmic coordinate system of the envelope of the hydraulic dynamometer is established with rotational speed as the abscissa and power as the ordinate; the envelope of the hydraulic dynamometer is obtained using the full water line, maximum absorbed power, highest rotational speed and lowest stable operating line to represent the working range of the hydraulic dynamometer.

4. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 2, the power remains constant while the water volume is reduced, causing the rotational speed of the hydraulic dynamometer to rise from point a on the envelope to point b on the envelope. At this point, the hydraulic dynamometer is operating at the lowest stable water volume, and the operation of the hydraulic dynamometer at each operating point and the stability of each system are tested.

5. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 2, the water inflow is increased while the power remains constant, causing the rotational speed of the hydraulic dynamometer to decrease from point a on the envelope to point c; at this point, the hydraulic dynamometer is in a full water state; the operation of the hydraulic dynamometer at each operating point and the stability of each system are tested.

6. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 3, when the prime mover speed is permissible, a speed boundary test of the hydraulic dynamometer envelope is conducted. The test is carried out at points a1 to e1 with different power levels close to the speed critical line to verify the speed performance of the hydraulic dynamometer.

7. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 4, if the power of the prime mover is permissible, a maximum absorption torque boundary test of the hydraulic dynamometer is conducted. The test is carried out at points a2 to e2 with different power and speeds close to the full water critical line to verify the maximum absorption torque performance of the hydraulic dynamometer.

8. The high-speed hydraulic dynamometer debugging method according to claim 6, characterized in that: When the power and speed of the prime mover are permissible, a maximum power boundary test of the hydraulic dynamometer is conducted. The test is carried out at points a3 to e3, which are close to the maximum power line at different speeds, in order to verify the performance of the hydraulic dynamometer under the maximum power absorption state.

9. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 5, based on the characteristics of the prime mover, and under the premise of ensuring safety, a test is conducted on the minimum absorbed power stability line of the hydraulic dynamometer. Points a4 to e4, which are close to the minimum stable power line at different speeds, are selected for the test to verify the minimum power stability line of the hydraulic dynamometer.

10. The high-speed hydraulic dynamometer debugging method according to claim 1, characterized in that: In step 6, after completing the above steps and shutting down the hydraulic dynamometer, inspect the appearance and internal flow channels of the hydraulic dynamometer to check for any abnormalities such as water or oil leakage or excessive wear. Check the integrity of the rotor, stator, and other internal components of the hydraulic dynamometer and make corresponding inspection records.

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