Reset measuring device and method for motor rotor of nuclear reactor coolant pump

Abstract

The invention belongs to the field of nuclear power plant reactor coolant pump motor set installation and testing, and particularly relates to a nuclear reactor coolant pump motor rotor reset measuring device and method. A plurality of groups of detection assemblies are respectively arranged on an upper sliding rotor and a lower flywheel of the motor; the data processing assembly comprises a control box and a remote control PC terminal. The detection assembly, the control box and the remote control PC terminal are connected in sequence, and the detection assembly measures and collects the position of the rotor, generates measurement and collection data and transmits the measurement and collection data to the control box; the control box receives the measurement acquisition data transmitted by the detection assembly, generates measurement result data after processing the measurement acquisition data, and transmits the measurement result data to the remote control PC terminal; and the remote control PC terminal receives the measurement result data transmitted by the control box and displays the measurement result data. The device is simple in structure and easy and convenient to operate, and rotor resetting after the reactor coolant pump motor no-load test can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of installation and testing of a reactor coolant pump motor set in a nuclear power plant, and in particular relates to a nuclear reactor coolant pump motor rotor reset measurement device and method. Background Art

[0002] Take a three-bearing reactor coolant pump in a nuclear power plant as an example. After the motor is manufactured and installed by the manufacturer, it is disassembled into parts and shipped to the nuclear power plant. It needs to be assembled in the power plant maintenance workshop and then transported to the nuclear island workshop for subsequent installation. When the reactor coolant pump is disassembled for maintenance, the motor also needs to be disassembled from the nuclear island and transported as a whole to the maintenance workshop for disassembly. After the maintenance is completed, it is transported to the nuclear island workshop for installation.

[0003] During the assembly of the reactor coolant pump motor rotor and the installation and pump connection with the nuclear island, the motor rotor needs to be pushed in to ensure the correct spatial position of the coolant pump shaft system. In order to verify the quality of the motor assembly, a no-load test is required in the maintenance workshop after the assembly is completed, and it will be transported to the nuclear island after the test is passed; during the test, the motor rotor shaft system will have a certain position offset phenomenon, and at this time it is impossible to measure the motor shaft system in a conventional way to adjust the push-in.

[0004] Therefore, it is necessary to design a nuclear reactor coolant pump motor rotor resetting measurement device to measure the spatial position of the rotor shaft system before and after the motor test. After comparison, the rotor shaft system is pushed to the state before the test for subsequent connection and adjustment with the pump shaft. Summary of the invention

[0005] The object of the present invention is to provide a nuclear reactor coolant pump motor rotor reset measurement device and method, the device has a simple structure and is easy to operate, and can achieve the rotor reset of the reactor coolant pump motor after a no-load test.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A nuclear reactor coolant pump motor rotor reset measurement device, the device comprises: a detection component and a data processing component; the detection component is a plurality of groups, respectively arranged on the upper sliding rotor and the lower flywheel of the motor; the data processing component comprises a control box and a remote control PC terminal; the detection component, the control box and the remote control PC terminal are connected in sequence, the detection component measures and collects the rotor position, generates measurement and collection data, and transmits the measurement and collection data to the control box; the control box receives the measurement and collection data transmitted by the detection component, generates measurement result data after processing the measurement and collection data, and transmits the measurement result data to the remote control PC terminal; the remote control PC terminal receives the measurement result data transmitted by the control box, and displays the measurement result data.

[0008] The detection components are evenly spaced and arranged on the upper sliding rotor of the motor and the lower flywheel. The number of the detection components arranged on the upper sliding rotor of the motor is the same as the number of the detection components arranged on the lower flywheel, and the positions of the detection components arranged on the upper sliding rotor of the motor correspond to the positions of the detection components arranged on the lower flywheel.

[0009] The detection assembly includes: a connecting base, a measuring rod, and a contact displacement sensor; the connecting base is connected to the upper sliding rotor or the lower flywheel of the motor, the tail of the measuring rod is detachably connected to the connecting base, and the contact displacement sensor is installed at the end of the measuring rod.

[0010] The connecting base is provided with a U-shaped groove, which serves as a positioning reference. The size of the groove matches the outer diameter of the measuring rod and is used to clamp the measuring rod on the connecting base. The groove realizes the quick-release positioning function of the measuring rod on the connecting base, while ensuring the positioning accuracy of repeated installation of the measuring rod.

[0011] The Z-axis direction of the groove is clamped and positioned by a pressure plate, and the Y-axis and X-axis directions are close to the connecting base through a measuring rod and then clamped by a screw rod.

[0012] The control box includes: a data acquisition module, a signal amplifier, and a signal transmitting and receiving module; the data acquisition module receives the measurement and acquisition data transmitted by the contact displacement sensor, transmits the measurement and acquisition data to the signal amplifier for processing to generate measurement result data, and transmits the measurement result data to the remote control PC in real time through the signal transmitting and receiving module.

[0013] The control box also includes a rechargeable battery module for maintaining normal operation of the system in the event of a loss of external power supply.

[0014] The signal transmitting and receiving module is a wireless communication module.

[0015] The remote control PC-side integrated software operation is used to compare the measurement result data, convert it into a schematic diagram of the relative spatial position of the rotor, and directly provide an operation structure and adjustment suggestions.

[0016] A method for measuring the rotor reset of a nuclear reactor coolant pump motor, the method comprising:

[0017] Step 1: Assemble the reactor coolant pump and push the motor rotor into place;

[0018] Step 2, installing the reactor coolant pump motor rotor reset device detection assembly;

[0019] Step 3: Connect the detection component to the remote control PC;

[0020] Step 4: Mark the motor rotor angle and measure the first set of motor rotor position data as point O;

[0021] Step 5: Remove the detection component;

[0022] Step 6: Carry out a no-load test of the motor;

[0023] Step 7: Install the detection component;

[0024] Step 8, turn the motor rotor to the marked angle and measure the second set of motor rotor position data;

[0025] Step 9: According to the measured data, push the rotor to point O;

[0026] Step 10: The reactor coolant pump rotor re-centering work is completed.

[0027] The beneficial technical effects of the present invention are:

[0028] 1. The present invention provides a nuclear reactor coolant pump motor rotor reset measurement device, which provides a feasible condition for the installation of the motor after offline testing. The conventional main pump motor maintenance method is to conduct an online test on the motor after the motor is installed in the nuclear island. If the test fails due to problems such as assembly quality, the motor needs to be transported to the maintenance workshop again as a whole, resulting in a large waste of resources.

[0029] 2. The present invention provides a nuclear reactor coolant pump motor rotor reset measurement device, which can effectively improve the adjustment progress. The conventional centering adjustment method is measured by a dial indicator, and the high-precision sensor used in this tooling set has an accuracy of up to 0.001mm.

[0030] 3. A nuclear reactor coolant pump motor rotor reset measurement device provided by the present invention can effectively improve work efficiency. Through PC-side integrated software calculation, the measurement can be compared and converted into a schematic diagram of the relative spatial position of the rotor, and the calculation structure and adjustment suggestions can be directly given, which greatly improves the efficiency of the adjustment operation and shortens the maintenance period.

[0031] 4. The nuclear reactor coolant pump motor rotor reset measurement device provided by the present invention can effectively shorten the main line construction period and improve the unit efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention provides a schematic diagram of the installation of a nuclear reactor coolant pump motor rotor reset measurement device. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0034] The present invention provides a nuclear reactor coolant pump motor rotor reset measurement device, which includes a detection component and a data processing component. The detection components are multiple groups, which are evenly arranged on the upper sliding rotor of the motor and the lower flywheel. The number of the detection components arranged on the upper sliding rotor of the motor is the same as the number of the detection components arranged on the lower flywheel, and the position of the detection components arranged on the upper sliding rotor of the motor corresponds to the position of the detection components arranged on the lower flywheel.

[0035] In a specific embodiment, four groups of detection components are arranged on the upper sliding rotor and the lower flywheel of the motor, respectively. Figure 1 shown.

[0036] The data processing component includes a control box and a remote control PC. The detection component, control box, and remote control PC are connected in sequence. The detection component measures and collects the rotor position, generates measurement and collection data, and transmits the measurement and collection data to the control box; the control box receives the measurement and collection data transmitted by the detection component, processes the measurement and collection data, generates measurement result data, and transmits the measurement result data to the remote control PC; the remote control PC receives the measurement result data transmitted by the control box, displays the measurement result data, and completes the measurement data collection task for the target rotor. At the same time, through the integrated software operation of the remote control PC, the measurement result data can be compared and converted into a schematic diagram of the relative spatial position of the rotor, and the operation structure and adjustment suggestions are directly given.

[0037] Each set of detection components includes: a connecting base, a measuring rod, and a contact displacement sensor. The connecting base is connected to the upper sliding rotor or the lower flywheel of the motor by bolts. A U-shaped groove is provided on the connecting base, which serves as a positioning reference. The size of the groove matches the outer diameter of the measuring rod and is used to clamp the measuring rod on the connecting base. The groove realizes the quick-release positioning function of the measuring rod on the connecting base, while ensuring the positioning accuracy of the repeated installation of the measuring rod.

[0038] In a specific embodiment, the Z-axis direction of the groove is clamped and positioned using a pressure plate, and the Y-axis and X-axis directions are pressed against the connecting base through a measuring rod and then clamped using a screw.

[0039] The measuring rod adopts a hollow rod structure, the end of which is threadedly mounted with a contact displacement sensor, and the tail is clamped and connected to the connecting base through a small contact surface.

[0040] The contact displacement sensor is installed at the end of the measuring rod. It uses high-precision sensing to measure the spatial position of the motor rotor. The signal is transmitted from the tail cable through the control box to the remote control PC for processing and analysis.

[0041] The control box includes: data acquisition module, signal amplifier, signal transmitting and receiving module. The data acquisition module receives the measurement and acquisition data transmitted by the contact displacement sensor, transmits the measurement and acquisition data to the signal amplifier for processing to generate measurement result data, and transmits the measurement result data to the remote control PC in real time through the signal transmitting and receiving module.

[0042] In a specific implementation, the signal transmitting and receiving module is a wireless communication module.

[0043] The control box also includes a rechargeable battery module to maintain normal operation of the system in the event of a loss of external power.

[0044] The present invention provides a nuclear reactor coolant pump motor rotor reset measurement device, which performs motor rotor reset measurement, and specifically comprises the following steps:

[0045] Step 1: Assemble the reactor coolant pump and push the motor rotor into place;

[0046] Step 2: Install the reactor coolant pump motor rotor reset device detection assembly, such as Figure 1 As shown;

[0047] Step 3: Connect the detection component to the remote control PC;

[0048] Step 4: Mark the motor rotor angle and measure the first set of motor rotor position data as point O;

[0049] Step 5: Remove the detection component;

[0050] Step 6: Carry out a no-load test of the motor;

[0051] Step 7: Install the detection component;

[0052] Step 8, turn the motor rotor to the marked angle and measure the second set of motor rotor position data;

[0053] Step 9: According to the measured data, push the rotor to point O;

[0054] Step 10: The reactor coolant pump rotor re-centering work is completed.

[0055] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A nuclear reactor coolant pump motor rotor reset measurement device, characterized in that: The device comprises: a detection component and a data processing component; the detection component is a plurality of groups, which are respectively arranged on the upper sliding rotor and the lower flywheel of the motor; the data processing component comprises a control box and a remote control PC terminal; the detection component, the control box and the remote control PC terminal are connected in sequence, the detection component measures and collects the rotor position, generates measurement and collection data, and transmits the measurement and collection data to the control box; the control box receives the measurement and collection data transmitted by the detection component, generates measurement result data after processing the measurement and collection data, and transmits the measurement result data to the remote control PC terminal; the remote control PC terminal receives the measurement result data transmitted by the control box, and displays the measurement result data.

2. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 1, characterized in that: The detection components are evenly spaced and arranged on the upper sliding rotor of the motor and the lower flywheel. The number of the detection components arranged on the upper sliding rotor of the motor is the same as the number of the detection components arranged on the lower flywheel, and the positions of the detection components arranged on the upper sliding rotor of the motor correspond to the positions of the detection components arranged on the lower flywheel.

3. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 1, characterized in that: The detection assembly includes: a connecting base, a measuring rod, and a contact displacement sensor; the connecting base is connected to the upper sliding rotor or the lower flywheel of the motor, the tail of the measuring rod is detachably connected to the connecting base, and the contact displacement sensor is installed at the end of the measuring rod.

4. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 3, characterized in that: The connecting base is provided with a U-shaped groove, which serves as a positioning reference. The size of the groove matches the outer diameter of the measuring rod and is used to clamp the measuring rod on the connecting base. The groove realizes the quick-release positioning function of the measuring rod on the connecting base, while ensuring the positioning accuracy of repeated installation of the measuring rod.

5. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 4, characterized in that: The Z-axis direction of the groove is clamped and positioned by a pressure plate, and the Y-axis and X-axis directions are close to the connecting base through a measuring rod and then clamped by a screw rod.

6. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 1, characterized in that: The control box includes: a data acquisition module, a signal amplifier, and a signal transmitting and receiving module; the data acquisition module receives the measurement and acquisition data transmitted by the contact displacement sensor, transmits the measurement and acquisition data to the signal amplifier for processing to generate measurement result data, and transmits the measurement result data to the remote control PC in real time through the signal transmitting and receiving module.

7. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 6, characterized in that: The control box also includes a rechargeable battery module for maintaining normal operation of the system in the event of a loss of external power supply.

8. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 6, characterized in that: The signal transmitting and receiving module is a wireless communication module.

9. A nuclear reactor coolant pump motor rotor reset measurement device according to claim 1, characterized in that: The remote control PC-side integrated software operation is used to compare the measurement result data, convert it into a schematic diagram of the relative spatial position of the rotor, and directly provide an operation structure and adjustment suggestions.

10. A method for measuring the rotor reset of a nuclear reactor coolant pump motor, using the device for measuring the rotor reset of a nuclear reactor coolant pump motor according to claim 1, characterized in that: The method comprises: Step 1: Assemble the reactor coolant pump and push the motor rotor into place; Step 2, installing the reactor coolant pump motor rotor reset device detection assembly; Step 3: Connect the detection component to the remote control PC; Step 4, mark the motor rotor angle and measure the first set of motor rotor position data as point O; Step 5: Remove the detection component; Step 6: Carry out a no-load test of the motor; Step 7: Install the detection component; Step 8, turn the motor rotor to the marked angle and measure the second set of motor rotor position data; Step 9: According to the measured data, push the rotor to point O; Step 10: The reactor coolant pump rotor re-centering work is completed.

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