A method and device for testing the hydraulic turning gear of a nuclear power plant under load

Abstract

The present invention relates to a method and device for a load test of a hydraulic turning gear in a nuclear power plant, comprising: performing preparation before the test; forcing a power oil control valve of the hydraulic turning gear with a logic signal and forcing a speed switching valve of the hydraulic turning gear, so that the hydraulic turning gear is in an oil circuit switching state between a first oil circuit and a second oil circuit; controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively; obtaining first operation information after the hydraulic turning gear enters the first oil circuit and second operation information after the hydraulic turning gear enters the second oil circuit; controlling the hydraulic turning gear to close, and obtaining shutdown information after the hydraulic turning gear is closed; obtaining a load test curve of the hydraulic turning gear according to the first operation information, the second operation information and the shutdown information; judging the load performance of the hydraulic turning gear according to the load test curve of the hydraulic turning gear. The present invention can test and verify the online load performance of the hydraulic turning gear, monitor the status of the shaft system of the steam turbine generator set in advance, and improve the reliability of the key equipment of the generator set.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant steam turbines, and more specifically to a method and device for a nuclear power plant hydraulic turning load test. Background Art

[0002] At present, in the hydraulic cranking system of the half-speed steam turbine generator set of the nuclear power plant, the power output of the hydraulic cranking and the engagement and disengagement function of the clutch cannot be checked by offline cranking. At the same time, the inspection of the hydraulic cranking parts is limited by the technical conditions for on-site implementation, and the equipment cannot be disassembled for inspection. In addition, after the hydraulic cranking device is returned to the factory for repair, only the leakage test of the hydraulic motor and its single output test are performed, which cannot truly reflect the output situation when the steam turbine generator rotor is connected.

[0003] Therefore, it is necessary to formulate a corresponding test plan to realize online load testing and verification of the hydraulic turntable. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method and device for a nuclear power plant hydraulic turning load test in view of the defects of the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct a nuclear power plant hydraulic turning load test method, which is applied to a half-speed steam turbine generator set in a nuclear power plant, comprising the following steps:

[0006] Carry out the pre-test preparation to put the hydraulic turning oil supply system of the steam turbine generator set into the state of waiting for the test;

[0007] Forcing a power oil control valve of the hydraulic turning gear with a logic signal and forcing a speed switching valve of the hydraulic turning gear to put the hydraulic turning gear in an oil circuit switching state between a first oil circuit and a second oil circuit;

[0008] Control the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively;

[0009] Acquire first operation information after the hydraulic turning wheel enters the first oil circuit and second operation information after the hydraulic turning wheel enters the second oil circuit;

[0010] Controlling the hydraulic turning gear to be turned off, and obtaining the shutdown information after the hydraulic turning gear is turned off;

[0011] Obtaining a load test curve of the hydraulic turning machine according to the first operation information, the second operation information and the shutdown information;

[0012] The load performance of the hydraulic turning gear is determined according to the load test curve of the hydraulic turning gear.

[0013] In the nuclear power plant hydraulic cranking load test method of the present invention, the pre-test preparation to make the hydraulic cranking oil supply system of the steam turbine generator set enter the test-ready state includes the following sub-steps:

[0014] Set pre-test parameters;

[0015] After completing the pre-test parameter setting, the hydraulic turning gear is controlled to enter a lubrication state.

[0016] In the nuclear power plant hydraulic turning load test method of the present invention, the setting of pre-test parameters includes the following sub-steps:

[0017] Set the jacking height of each bearing of the steam turbine generator set to 0.08-0.10mm;

[0018] The lifting pressure regulating valve of the rotor of the hydraulic turning gear is adjusted so that the pressure value of the lifting pressure regulating valve reaches a preset pressure.

[0019] In the nuclear power plant hydraulic turning gear load test method described in the present invention, the logic signal forcing of the power oil control valve of the hydraulic turning gear and the forcing of the speed switching valve of the hydraulic turning gear include the following sub-steps:

[0020] Setting the logic signal of the power oil control valve to a high level, so that the power oil control valve is in a power-off state;

[0021] The forcing points before the R and S ends of the RS trigger of the speed switching valve of the hydraulic turning gear are forced.

[0022] In the nuclear power plant hydraulic turning gear load test method of the present invention, the first oil circuit is: an oil circuit in which the rotor speed of the hydraulic turning gear is 2r / min;

[0023] The second oil circuit is an oil circuit in which the rotor speed of the hydraulic turning gear is 20r / min.

[0024] In the nuclear power plant hydraulic turning gear load test method of the present invention, controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively comprises the following sub-steps:

[0025] Control the manual speed switching valve of the hydraulic turning wheel to switch the manual speed switching valve to 2 r / min;

[0026] Control the first oil circuit control valve to open;

[0027] Determining whether the rotor of the steam turbine generator has been turned;

[0028] If so, adjust the rotor speed of the hydraulic turning gear to 2 r / min, so that the hydraulic turning gear enters the first oil circuit.

[0029] In the nuclear power plant hydraulic turning gear load test method of the present invention, controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively comprises the following sub-steps:

[0030] Control the manual speed switching valve of the hydraulic turning gear to switch the manual speed switching valve to 20r / min;

[0031] Control the second oil circuit control valve to open;

[0032] Determining whether the rotor of the steam turbine generator has been turned;

[0033] If so, adjust the rotor speed of the hydraulic turning gear to 20 r / min, so that the hydraulic turning gear enters the second oil circuit.

[0034] In the nuclear power plant hydraulic turning gear load test method of the present invention, controlling the hydraulic turning gear to be turned off and obtaining the shutdown information after the hydraulic turning gear is turned off includes the following sub-steps:

[0035] The hydraulic turning gear controls the hydraulic turning gear's power oil supply isolation valve to be closed to stop the hydraulic turning gear's output of speed to the rotor.

[0036] After the hydraulic turning gear stops outputting the rotation speed of the rotor, the shutdown information of the hydraulic turning gear after being closed is obtained.

[0037] In the nuclear power plant hydraulic turning gear load test method of the present invention, the first operation information is: rotor time information and speed information after the hydraulic turning gear enters the first oil circuit;

[0038] The second operation information is: rotor time information and speed information after the hydraulic turning enters the second oil circuit;

[0039] The shutdown information includes: time information and speed information of the rotor of the hydraulic turning gear.

[0040] The present invention also provides a nuclear power plant hydraulic turning gear load test device, comprising:

[0041] The test preparation unit is used to perform pre-test preparations to put the hydraulic turning oil supply system of the steam turbine generator set into a state ready for testing;

[0042] A forcing unit, used for forcing a power oil control valve of the hydraulic turning gear with a logic signal and forcing a speed switching valve of the hydraulic turning gear, so that the hydraulic turning gear is in an oil circuit switching state between a first oil circuit and a second oil circuit;

[0043] A control unit, used for controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively;

[0044] An information acquisition unit, used for acquiring first operation information after the hydraulic turning wheel enters the first oil circuit and second operation information after the hydraulic turning wheel enters the second oil circuit;

[0045] A closing unit, used for controlling the hydraulic turning gear to close and obtaining the shutdown information after the hydraulic turning gear is closed;

[0046] A curve acquisition unit, configured to acquire a load test curve of the hydraulic turning gear according to the first operation information, the second operation information and the shutdown information;

[0047] The performance judgment unit is used to judge the load performance of the hydraulic turning gear according to the load test curve of the hydraulic turning gear.

[0048] The implementation of the method and device for the load test of the hydraulic turning gear of a nuclear power plant of the present invention has the following beneficial effects: including: performing pre-test preparation; forcing the power oil control valve of the hydraulic turning gear with a logic signal and forcing the speed switching valve of the hydraulic turning gear to put the hydraulic turning gear in an oil circuit switching state between the first oil circuit and the second oil circuit; controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively; obtaining the first operation information after the hydraulic turning gear enters the first oil circuit and the second operation information after the hydraulic turning gear enters the second oil circuit; controlling the hydraulic turning gear to close and obtaining the shutdown information after the hydraulic turning gear is closed; obtaining the load test curve of the hydraulic turning gear according to the first operation information, the second operation information and the shutdown information; judging the load performance of the hydraulic turning gear according to the load test curve of the hydraulic turning gear. The present invention can test and verify the online load performance of the hydraulic turning gear, monitor the status of the shaft system of the steam turbine generator set in advance, and improve the reliability of the key equipment of the generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0050] Figure 1 It is a schematic flow chart of a method for carrying out a load test of a hydraulic turning gear in a nuclear power plant provided by an embodiment of the present invention;

[0051] Figure 2 is a load test curve diagram of a hydraulic turning machine provided by an embodiment of the present invention;

[0052] Figure 3 It is a structural schematic diagram of a nuclear power plant hydraulic turning load test device provided by an embodiment of the present invention;

[0053] Figure 4 It is a schematic diagram of a hydraulic turning oil supply system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0055] refer to Figure 1 , which is a flow chart of an optional embodiment of a nuclear power plant hydraulic turning gear load test method provided by the present invention. The nuclear power plant hydraulic turning gear load test method can be applied to a half-speed steam turbine generator set in a nuclear power plant, that is, the nuclear power plant hydraulic turning gear load test method can be used to test the actual power output and state of the hydraulic turning gear with the steam turbine generator rotor, and can also test and verify the control circuit and equipment conditions of the hydraulic turning gear, thereby improving the reliability of key equipment of the steam turbine generator set.

[0056] Specifically, Figure 1 As shown, the nuclear power plant hydraulic turning load test method includes the following steps:

[0057] Step S101, perform pre-test preparation to put the hydraulic cranking oil supply system of the steam turbine generator set into a state ready for testing.

[0058] Optionally, in some embodiments, performing pre-test preparations to put the hydraulic cranking oil supply system of the steam turbine generator set into a state ready for testing includes the following steps: setting pre-test parameters; after completing the pre-test parameter setting, controlling the hydraulic cranking to enter a lubrication state.

[0059] The setting of the parameters before the test includes: setting the lifting height of each bearing of the steam turbine generator set to 0.08-0.10 mm; adjusting the lifting pressure regulating valve 23 of the rotor of the hydraulic turning gear so that the pressure value of the lifting pressure regulating valve 23 reaches the preset pressure.

[0060] Optionally, in an embodiment of the present invention, the preset pressure may be 2.8 MPa.

[0061] Step S102 , forcing the power oil control valve 24 of the hydraulic turning gear with a logic signal and forcing the speed switching valve 12 of the hydraulic turning gear to put the hydraulic turning gear in an oil circuit switching state between the first oil circuit 100 and the second oil circuit 200 .

[0062] Optionally, in some embodiments, forcing the logic signal of the power oil control valve 24 of the hydraulic turning gear and forcing the speed switching valve 12 of the hydraulic turning gear include the following steps: setting the logic signal of the power oil control valve 24 to a high level to put the power oil control valve 24 in a power-off state; forcing the forcing point before the R and S ends of the RS trigger of the speed switching valve 12 of the hydraulic turning gear.

[0063] Specifically, the logic signal of the power oil control valve 24 of the hydraulic turning gear is first forced to be set to a high level, thereby making the power oil control valve 24 in a power-off state and connecting the power oil supply circuit of the hydraulic turning gear; then, the forced point in front of the R end and the S end of the RS trigger of the speed switching valve 12 of the hydraulic turning gear is forced, thereby realizing the switching state of the hydraulic turning gear between the first oil circuit 100 and the second oil circuit 200, that is, the hydraulic turning gear can be switched to the first oil circuit 100 or the second oil circuit 200.

[0064] Step S103, controlling the hydraulic turning gear to enter the first oil circuit 100 and the second oil circuit 200 respectively.

[0065] Optionally, in an embodiment of the present invention, if Figure 4 As shown, the first oil circuit 100 is an oil circuit for the hydraulic turning gear with a rotor speed of 2 r / min. The second oil circuit 200 is an oil circuit for the hydraulic turning gear with a rotor speed of 20 r / min. Figure 4 The 01 in it means hydraulic turning.

[0066] Optionally, in some embodiments, controlling the hydraulic turning gear to enter the first oil circuit 100 and the second oil circuit 200 respectively includes the following steps: controlling the manual speed switching valve 11 of the hydraulic turning gear to switch the manual speed switching valve 11 to 2r / min; controlling the first oil circuit control valve 13 to open; determining whether the rotor of the steam turbine generator (i.e., the generator of the steam turbine unit) has been turned; if so, adjusting the rotor speed of the hydraulic turning gear to 2r / min, so that the hydraulic turning gear enters the first oil circuit 100.

[0067] Specifically, the manual switching valve 11 of the hydraulic turning gear is controlled to switch to 2r / min (even if the rotor speed of the hydraulic turning gear is 2r / min), and the first oil circuit control valve 13 is opened. During the opening of the first oil circuit control valve 13, it is monitored whether the rotor of the steam turbine generator has been turned. If the rotor of the steam turbine generator has been turned, the rotor speed of the hydraulic turning gear is adjusted to 2r / min, and the hydraulic turning gear enters the first oil circuit 100.

[0068] Optionally, in some embodiments, controlling the hydraulic turning gear to enter the first oil circuit 100 and the second oil circuit 200 respectively includes the following steps: controlling the manual speed switching valve 11 of the hydraulic turning gear to switch the manual speed switching valve 11 to 20r / min; controlling the second oil circuit control valve 21 to open; determining whether the rotor of the steam turbine generator has been turned; if so, adjusting the rotor speed of the hydraulic turning gear to 20r / min, so that the hydraulic turning gear enters the second oil circuit 200.

[0069] Specifically, the manual switching valve 11 of the hydraulic turning gear is controlled to switch to 20r / min (even if the rotor speed of the hydraulic turning gear is 20r / min), and the second oil circuit control valve 21 is opened. During the opening of the second oil circuit control valve 21, it is monitored whether the rotor of the steam turbine generator has been turned. If the rotor of the steam turbine generator has been turned, the rotor speed of the hydraulic turning gear is adjusted to 20r / min, and the hydraulic turning gear enters the first oil circuit 100.

[0070] Step S104 , obtaining first operation information after the hydraulic turning gear enters the first oil circuit 100 and second operation information after the hydraulic turning gear enters the second oil circuit 200 .

[0071] Optionally, in the embodiment of the present invention, the first operation information is: the rotor time information and speed information after the hydraulic turning enters the first oil circuit 100. The second operation information is: the rotor time information and speed information after the hydraulic turning enters the second oil circuit 200. Among them, the time information in the embodiment of the present invention is the operation time of the rotor. The speed information in the embodiment of the present invention is the real-time speed of the rotor.

[0072] Specifically, in the embodiment of the present invention, after the hydraulic turning gear enters the first oil circuit 100, that is, the rotor of the steam turbine generator has been turned and the rotor speed of the hydraulic turning gear has been adjusted to 2r / min, at this time, the preset time period is monitored, and the time information and speed information of the 2r / min oil supply shut-off valve are obtained in the preset time period.

[0073] Specifically, in the embodiment of the present invention, after the hydraulic turning gear enters the second oil circuit 200, that is, the rotor of the steam turbine generator has been turned and the rotor speed of the hydraulic turning gear has been adjusted to 20r / min, at this time, the preset time period is monitored, and the time information and speed information of the 20r / min oil supply shut-off valve are obtained in the preset time period.

[0074] Optionally, in the embodiment of the present invention, the preset time period may be 5 minutes.

[0075] Step S105, controlling the hydraulic turning gear to be turned off, and obtaining the shutdown information after the hydraulic turning gear is turned off.

[0076] Optionally, in an embodiment of the present invention, controlling the hydraulic turning gear to close and obtaining the shutdown information after the hydraulic turning gear is closed includes the following steps: controlling the power oil supply isolation valve 22 of the hydraulic turning gear of the hydraulic turning gear to close to stop the hydraulic turning gear from outputting the speed of the rotor to the rotor, and after the hydraulic turning gear stops outputting the speed of the rotor to obtain the shutdown information after the hydraulic turning gear is closed.

[0077] Optionally, in an embodiment of the present invention, the shutdown information is: time information and speed information of the rotor of the hydraulic turning gear. That is, after the speed output of the rotor of the hydraulic turning gear is stopped, the time information and speed information of the rotor of the hydraulic turning gear from the moment when the power oil supply isolation valve 22 is closed until the rotor completely stops are obtained.

[0078] Step S106: Obtain a load test curve of the hydraulic turning machine according to the first operation information, the second operation information and the shutdown information.

[0079] Step S107, judging the load performance of the hydraulic turning gear according to the load test curve of the hydraulic turning gear.

[0080] Specifically, in an embodiment of the present invention, after obtaining the first operating information, the second operating information and the shutdown information, a time and speed curve, that is, a load test curve of the hydraulic winch, is established according to the obtained first operating information, the second operating information and the shutdown information, and the load performance of the hydraulic winch is judged according to the load test curve.

[0081] like Figure 2 FIG. 1 is a load test curve diagram of a hydraulic turning wheel obtained according to a specific embodiment of the present invention.

[0082] like Figure 2 As shown, curve ① can be used to judge the adjustment performance of the 2r / min oil supply cut-off valve of the hydraulic turning gear; curve ② can be used to judge the stability performance of the 2r / min hydraulic turning gear; curve ③ can be used to judge the switching function of the speed manual switching valve 11; curve ④ can be used to judge the adjustment performance of the 20r / min oil supply cut-off valve; Figure 2 The curves from 20 onwards can be used to judge the performance of the power oil supply isolation valve 22.

[0083] That is Figure 2 As shown in the figure, it can be seen from curve ① that the adjustment performance of the 2r / min oil supply cut-off valve of the hydraulic turning gear is normal. It can be seen from curve ② that the stability performance of the 2r / min of the hydraulic turning gear is good (if the stability performance of 2r / min is poor, curve ② is not a smooth straight line, but a wavy line or a sawtooth curve). It can be seen from curve ③ that the switching function of the manual switching valve is good (if the cut-off function is poor, a larger arc is obtained in ③ instead of Figure 2 From curve ④, it can be seen that the adjustment performance of the 20r / min oil supply cut-off valve is normal. From the curve after 20 in 2, it can be seen that the performance of the power oil supply isolation valve 22 is good (if the performance of the power oil supply isolation valve is poor, the rotor speed will not drop steadily after closing. Figure 2 The curve in the figure is not a gently declining curve, but a jagged curve or a curve with obvious ups and downs).

[0084] Through the nuclear power plant hydraulic turning gear load test method of the embodiment of the present invention, the online load performance of the hydraulic turning gear can be tested and verified, which can be used as equipment re-identification after the hydraulic turning gear is replaced, equipment status monitoring and equipment safety performance evaluation can be carried out, and the status of the steam turbine generator set shaft system can be monitored in advance; at the same time, this method changes the original equipment status verification node (the original verification was carried out before the hydraulic turning gear was officially put into operation after the maintenance of the steam turbine), which can avoid delays in the overhaul key path.

[0085] Further, refer to Figure 3 , which is a structural schematic diagram of an optional embodiment of a nuclear power plant hydraulic turning load test device provided in an embodiment of the present invention.

[0086] The nuclear power plant hydraulic turning gear load test device can be used to implement the nuclear power plant hydraulic turning gear load test method disclosed in the embodiment of the present invention.

[0087] Specifically, Figure 3 As shown, the nuclear power plant hydraulic turning load test device includes:

[0088] The test preparation unit 301 is used to perform pre-test preparations to put the hydraulic cranking oil supply system of the steam turbine generator set into a state ready for testing.

[0089] The forcing unit 302 is used to force the logic signal of the power oil control valve 24 of the hydraulic turning gear and to force the speed switching valve 12 of the hydraulic turning gear so that the hydraulic turning gear is in the oil circuit switching state between the first oil circuit 100 and the second oil circuit 200.

[0090] The control unit 303 is used to control the hydraulic turning gear to enter the first oil circuit 100 and the second oil circuit 200 respectively.

[0091] The information acquisition unit 304 is used to acquire first operation information after the hydraulic turning gear enters the first oil circuit 100 and second operation information after the hydraulic turning gear enters the second oil circuit 200 .

[0092] The closing unit 305 is used to control the hydraulic turning gear to be closed and obtain the shutdown information after the hydraulic turning gear is closed.

[0093] The curve acquisition unit 306 is used to obtain a load test curve of the hydraulic turning machine according to the first operation information, the second operation information and the shutdown information.

[0094] The performance judgment unit 307 is used to judge the load performance of the hydraulic turning gear according to the load test curve of the hydraulic turning gear.

[0095] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0096] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0097] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0098] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the protection scope of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A nuclear power plant hydraulic turning load test method, applied to a half-speed steam turbine generator set in a nuclear power plant, characterized in that: The following steps are involved: Carry out the pre-test preparation to put the hydraulic turning oil supply system of the steam turbine generator set into the state of waiting for the test; Forcing a power oil control valve of the hydraulic turning gear with a logic signal and forcing a speed switching valve of the hydraulic turning gear to put the hydraulic turning gear in an oil circuit switching state between a first oil circuit and a second oil circuit; Control the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively; Acquire first operation information after the hydraulic turning wheel enters the first oil circuit and second operation information after the hydraulic turning wheel enters the second oil circuit; Controlling the hydraulic turning gear to be turned off, and obtaining the shutdown information after the hydraulic turning gear is turned off; Obtaining a load test curve of the hydraulic turning machine according to the first operation information, the second operation information and the shutdown information; The first operation information is: the rotor time information and speed information after the hydraulic turning gear enters the first oil circuit; the second operation information is: the rotor time information and speed information after the hydraulic turning gear enters the second oil circuit; the shutdown information is: the time information and speed information of the rotor of the hydraulic turning gear; the obtaining of the load test curve of the hydraulic turning gear according to the first operation information, the second operation information and the shutdown information includes: establishing a time and speed curve according to the rotor time information and speed information after the hydraulic turning gear enters the first oil circuit, the rotor time information and speed information after the hydraulic turning gear enters the second oil circuit, and the time information and speed information of the rotor of the hydraulic turning gear, and obtaining the load test curve of the hydraulic turning gear; The load performance of the hydraulic turning gear is determined according to the load test curve of the hydraulic turning gear.

2. The method for testing the hydraulic turning gear of a nuclear power plant under load according to claim 1, characterized in that: The preparation before the test is performed to make the hydraulic turning oil supply system of the steam turbine generator set enter the state to be tested, which includes the following sub-steps: Set pre-test parameters; After completing the pre-test parameter setting, the hydraulic turning gear is controlled to enter a lubrication state.

3. The method for testing the hydraulic turning gear of a nuclear power plant under load according to claim 2, characterized in that: The setting of pre-test parameters comprises the following sub-steps: Set the jacking height of each bearing of the steam turbine generator set to 0.08~0.10mm; The lifting pressure regulating valve of the rotor of the hydraulic turning gear is adjusted so that the pressure value of the lifting pressure regulating valve reaches a preset pressure.

4. The method for testing a nuclear power plant hydraulic turning gear under load according to claim 1, characterized in that: The step of forcing the power oil control valve of the hydraulic turning gear with a logic signal and forcing the speed switching valve of the hydraulic turning gear comprises the following sub-steps: Setting the logic signal of the power oil control valve to a high level, so that the power oil control valve is in a power-off state; The forcing points before the R and S ends of the RS trigger of the speed switching valve of the hydraulic turning gear are forced.

5. The method for testing the hydraulic turning gear of a nuclear power plant under load according to claim 1, characterized in that: The first oil circuit is: the oil circuit for the rotor speed of the hydraulic turning gear to be 2r / min; The second oil circuit is an oil circuit in which the rotor speed of the hydraulic turning gear is 20r / min.

6. The method for testing the hydraulic turning gear of a nuclear power plant under load according to claim 5, characterized in that: The controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively comprises the following sub-steps: Control the manual speed switching valve of the hydraulic turning wheel to switch the manual speed switching valve to 2 r / min; Control the first oil circuit control valve to open; Determining whether the rotor of the steam turbine generator has been turned; If so, adjust the rotor speed of the hydraulic turning gear to 2 r / min, so that the hydraulic turning gear enters the first oil circuit.

7. The method for testing the hydraulic turning gear of a nuclear power plant under load according to claim 5, characterized in that: The controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively comprises the following sub-steps: Control the manual speed switching valve of the hydraulic turning gear to switch the manual speed switching valve to 20r / min; Control the second oil circuit control valve to open; Determining whether the rotor of the steam turbine generator has been turned; If so, adjust the rotor speed of the hydraulic turning gear to 20 r / min, so that the hydraulic turning gear enters the second oil circuit.

8. The method for testing a nuclear power plant hydraulic turning gear under load according to claim 1, characterized in that: The controlling the hydraulic turning gear to be turned off and obtaining the shutdown information after the hydraulic turning gear is turned off includes the following sub-steps: The hydraulic turning gear controls the hydraulic turning gear's power oil supply isolation valve to be closed to stop the hydraulic turning gear's output of speed to the rotor. After the hydraulic turning gear stops outputting the rotation speed of the rotor, the shutdown information of the hydraulic turning gear after being closed is obtained.

9. A nuclear power plant hydraulic turning load test device, characterized in that: include: The test preparation unit is used to perform pre-test preparations to put the hydraulic turning oil supply system of the steam turbine generator set into a state ready for testing; A forcing unit, used for forcing a power oil control valve of the hydraulic turning gear with a logic signal and forcing a speed switching valve of the hydraulic turning gear, so that the hydraulic turning gear is in an oil circuit switching state between a first oil circuit and a second oil circuit; A control unit, used for controlling the hydraulic turning gear to enter the first oil circuit and the second oil circuit respectively; An information acquisition unit, used for acquiring first operation information after the hydraulic turning wheel enters the first oil circuit and second operation information after the hydraulic turning wheel enters the second oil circuit; A closing unit, used for controlling the hydraulic turning gear to close and obtaining the shutdown information after the hydraulic turning gear is closed; A curve acquisition unit, configured to acquire a load test curve of the hydraulic turning gear according to the first operation information, the second operation information and the shutdown information; The first operation information is: the rotor time information and speed information after the hydraulic turning gear enters the first oil circuit; the second operation information is: the rotor time information and speed information after the hydraulic turning gear enters the second oil circuit; the shutdown information is: the time information and speed information of the rotor of the hydraulic turning gear; the obtaining of the load test curve of the hydraulic turning gear according to the first operation information, the second operation information and the shutdown information includes: establishing a time and speed curve according to the rotor time information and speed information after the hydraulic turning gear enters the first oil circuit, the rotor time information and speed information after the hydraulic turning gear enters the second oil circuit, and the time information and speed information of the rotor of the hydraulic turning gear, and obtaining the load test curve of the hydraulic turning gear; The performance judgment unit is used to judge the load performance of the hydraulic turning gear according to the load test curve of the hydraulic turning gear.

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