Rotor pumping and penetrating device for APA feed pump motor

Abstract

The utility model relates to an APA feed pump motor pumping and penetrating rotor device, which comprises a rotor traction mechanism for supporting the coupling side end part of a motor rotor and driving the motor rotor to move along the axial direction; and the rotor supporting mechanism is used for supporting the pump side end part of the motor rotor and adjusting the height of the pump side end part of the motor rotor, so that the motor rotor is separated from the stator, and the rotor traction mechanism drives the motor rotor to axially move to be separated from the stator. The rotor supporting mechanism supports the pump side end of the motor rotor and can adjust the height of the motor rotor, so that the motor rotor is separated from the stator, the rotor traction mechanism drives the motor rotor to axially move to be separated from the stator, unnecessary backrest wheel dismounting operation is reduced, and the rotor pumping and penetrating process is more stable and safer. After the rotor drawing and penetrating device is used, the risk that equipment is damaged by the original process is reduced, the maintenance work efficiency of the motor is improved, the hoisting labor cost is saved, and the industrial safety risk of personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power, and more specifically to an APA feedwater pump motor rotor extraction device. Background Art

[0002] During the comprehensive dismantling and overhaul process of the APA (nuclear power electric main feedwater pump system) feedwater pump motor, the extraction and insertion of the electronic rotor is a key step, which directly affects the overhaul quality and progress of the motor, and there is a high risk of equipment damage and industrial safety risks.

[0003] The original rotor extraction process of the APA water pump motor adopts the traditional method of installing a dummy shaft and sliding on a crane. It requires the installation of a dummy shaft, long-span and large-angle lifting of the lifting object, and the use of a sliding crane to extract the rotor.

[0004] The process involves three major steps: adjusting the gap between the stator and rotor during the first lifting, switching the lifting point after pulling out part of the rotor, and then pulling out all the rotors. The gap between the stator and the rotor requires close cooperation between the crane driver and the commander; the speed of the crane affects the gap change. If the gap is 0, the rotor and the stator will rub against each other and damage the equipment. The multiple manually controlled steps require extremely high skills and cooperation from the working group, which brings great uncertainty to the work.

[0005] In order to install the dummy shaft, the original process required pulling out the motor back wheel at one end, which increased the maintenance workload. The back wheel would sometimes get stuck during the process of pulling and installing the back wheel, which increased the workload and the risk of equipment damage. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an APA water pump motor rotor extraction device in view of the above-mentioned defects of the prior art.

[0007] The technical solution adopted by the utility model to solve the technical problem is to construct an APA feed water pump motor through-rotor device, comprising:

[0008] The rotor traction mechanism includes a coupling side end support for the motor rotor and drives the motor rotor to move axially;

[0009] The rotor support mechanism includes a support for the pump side end of the motor rotor and can adjust the height of the pump side end of the motor rotor so that the motor rotor is separated from the stator, and the rotor traction mechanism drives the motor rotor to move axially away from the stator.

[0010] In some embodiments, the rotor traction mechanism includes a guide frame and a support seat slidably mounted on the guide frame, and the support seat is used to lock and fix the end of the motor rotor.

[0011] In some embodiments, the rotor traction mechanism further includes a first adjustment component for driving the support seat to slide on the guide frame.

[0012] In some embodiments, the first adjustment component includes a crank handle and a gear set, and rotating the crank handle drives the support seat to slide along the guide frame through the gear set.

[0013] In some embodiments, the rotor traction mechanism includes a sliding seat that supports the lower side of the motor rotor and can slidably cooperate with the guide frame.

[0014] In some embodiments, the rotor support mechanism includes a wheel clamp for locking onto the backrest wheel, a guide rail connected to the wheel clamp, and a support frame supporting the guide rail.

[0015] In some embodiments, a guide assembly is provided at the upper end of the support frame for supporting and guiding the guide rail.

[0016] In some embodiments, the guide assembly includes a rotatable roller, and the roller is provided with a guide groove for positioning the guide rail.

[0017] In some embodiments, the guide assembly further comprises a second adjustment assembly for adjusting the height position of the roller.

[0018] In some embodiments, the second adjustment component includes a threaded seat disposed on the support frame, a screw rod rotatably disposed on the threaded seat, and an adjustment seat located at the upper end of the screw rod, and the roller is rotatably disposed on the adjustment seat.

[0019] The implementation of the APA feedwater pump motor rotor extraction device of the utility model has the following beneficial effects: the rotor support mechanism includes a pump-side end support for the motor rotor, and can adjust the height of the motor rotor so that the motor rotor is separated from the stator, allowing the rotor traction mechanism to drive the motor rotor to move axially away from the stator, reducing unnecessary backrest wheel disassembly operations, and making the rotor extraction process smoother and safer. After using the rotor extraction device, the risk of damage to equipment in the original process is reduced, the maintenance efficiency of the motor is improved, the labor cost of lifting is saved, and the industrial safety risk of personnel is reduced, thereby laying a good foundation for the inherent safety of nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 It is a schematic diagram of the installation structure of the APA feed water pump motor rotor extraction device in the embodiment of the utility model when the rotor is extracted;

[0022] Figure 2 yes Figure 1 A schematic diagram of the structure when the rotor traction mechanism in the middle coupling side direction supports the rotor;

[0023] Figure 3 yes Figure 1 Schematic diagram of the rotor support mechanism on the middle pump side supporting the rotor and guide rail. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0025] like Figures 1 to 3 As shown, the APA water pump motor rotor extraction device in a preferred embodiment of the utility model includes a rotor traction mechanism 1 and a rotor support mechanism 2. The rotor traction mechanism 1 includes a coupling side end support for the motor rotor 3, and drives the motor rotor 3 to move axially; the rotor support mechanism 2 includes a pump side end support for the motor rotor 3, and can adjust the height of the motor rotor 3 so that the motor rotor 3 is separated from the stator 4, allowing the rotor traction mechanism 1 to drive the motor rotor 3 to move axially away from the stator 4.

[0026] When the traction end and the support end are fixedly connected, and it is confirmed that the air gap between the motor rotor 3 and the stator 4 core meets the requirements, the motor rotor 3 is moved axially away from or close to the stator 4 to complete the extraction and re-insertion of the motor rotor 3 of the nuclear power plant electric feed water pump. By connecting and adapting other flanges, it can also be used for the extraction and re-insertion of the motor rotor 3 of the nuclear power plant condensate pump.

[0027] Combination Figure 2 As shown, the rotor traction mechanism 1 includes a guide frame 11, a support seat 12 slidably mounted on the guide frame 11, and a first adjustment component 13 for driving the support seat 12 to slide on the guide frame 11. The support seat 12 is locked and fixed to the end of the motor rotor 3 to support and fix the motor rotor 3. At the same time, when the first adjustment component 13 adjusts the position of the support seat 12 on the guide frame 11, it drives the motor rotor 3 to move axially to achieve extraction.

[0028] The first adjustment component 13 includes a hand crank handle 131 and a gear set 132. The gear set 132 is meshed with the support base 12 and the guide frame 11. The hand crank handle 131 is rotated to drive the support base 12 to slide along the guide frame 11 through the gear set 132. The rotation direction of the hand crank handle 131 is changed according to the direction in which the motor rotor 3 needs to move.

[0029] Preferably, the rotor traction mechanism 1 includes a sliding seat 14 that supports the lower side of the motor rotor 3 and can slide with the guide frame 11. When the motor rotor 3 moves axially, the sliding seat 14 supports the motor rotor 3 at the bottom and slides along the guide frame 11 to provide continuous supporting force for the motor rotor 3 and ensure the stability of the movement of the motor rotor 3.

[0030] Combination Figure 3 As shown, the rotor support mechanism 2 includes a wheel clamp 21 for locking on the backrest wheel 5, a guide rail 22 connected to the wheel clamp 21, and a support frame 23 supporting the guide rail 22. The wheel clamp 21 can be locked and fixed with the pump side end of the motor rotor 3, so that the motor rotor 3 is connected to the guide rail 22, and when the motor rotor 3 moves axially, the guide rail 22 is driven to move relative to the support frame 23.

[0031] Preferably, a guide assembly 231 for supporting and guiding the guide rail 22 is provided at the upper end of the support frame 23 , so that the guide rail 22 can move on the guide assembly 231 when moving with the motor rotor 3 .

[0032] In some embodiments, the guide assembly 231 includes a rotatable roller 2311, and the roller 2311 is provided with a guide groove 2312 for positioning the guide rail 22. The guide rail 22 is inserted into the guide groove 2312. When the guide rail 22 moves with the motor rotor 3, it will drive the roller 2311 to rotate, providing guidance and support for the movement of the guide rail 22, reducing the resistance during movement, and ensuring the smooth movement of the guide rail 22.

[0033] The guide assembly 231 also includes a second adjustment assembly 2313 for adjusting the height position of the roller 2311, which can raise and lower the guide rail 22 to control the height of the pump side end of the motor rotor 3 so that the motor rotor 3 can be separated from the stator 4 for easy extraction.

[0034] Furthermore, the second adjustment assembly 2313 includes a screw seat 2314 rotatably disposed on the support frame 23, a screw rod 2315 screwed on the screw seat 2314, and an adjustment seat 2316 located at the upper end of the screw rod 2315, and the roller 2311 is rotatably disposed on the adjustment seat 2316. When the screw seat 2314 is rotated, the screw rod 2315 and the adjustment seat 2316 can be driven to rise and fall, thereby adjusting the height position of the guide rail 22.

[0035] In other embodiments, the overall height of the support frame 23 may also be adjusted to adjust the height of the guide assembly 231 , thereby adjusting the height position of the guide rail 22 .

[0036] The APA feedwater pump motor rotor extraction device can be used for the extraction and insertion of the motor rotor 3 during the full inspection of the APA electric feedwater pump motor and the CEX condensate pump motor in the nuclear power plant, making it more suitable for the extraction and re-insertion of the motor rotor 3 of medium and large motors, reducing unnecessary disassembly operations of the backrest wheel 5, and making the process of extracting the motor rotor 3 smoother and safer.

[0037] The use of the motor rotor extraction 3 device reduces the risk of equipment damage by the original process, improves the efficiency of motor maintenance, saves lifting labor costs, reduces personnel industrial safety risks, and thus lays a good foundation for the intrinsic safety of nuclear power plants.

[0038] The following takes the extraction of the motor rotor 3 of the APA motor as an example:

[0039] Before the motor is ready to perform the work of pumping the motor rotor 3, the rotor traction mechanism 1 is placed on the APA motor coupler side, and the rotor support mechanism 2 is placed on the pump side. The rotor traction mechanism 1 and the rotor support mechanism 2 at both ends are adjusted to be on the same axis with the motor rotor 3.

[0040] Install the connecting shaft 31 on the shaft head of the motor rotor 3 on the motor coupler side, and connect it to the shaft head through 4 M24x65 bolts. Move the support seat 12 on the bracket of the traction end guide rail 22, adjust the position of the support seat 12 and clamp the connecting shaft 31. Adjust each foot of the traction end guide frame 11 so that the support is in place without empty feet.

[0041] Place the rotor support mechanism 2 on the pump side of the motor rotor 3, on the same axis as the motor. Lift the wheel clamp 21 on the pump side backrest wheel 5 and tighten it with the connecting bolts. Connect the T-shaped guide rail 22 to the end face of the wheel clamp 21 with 8 bolts. Then adjust the height of the two support frames 23 so that the T-shaped guide rail 22 falls exactly into the guide groove 2312 of the bracket roller 2311.

[0042] Use a special tool rod to rotate the screw seat 2314, slowly raise the height of the motor rotor 3, so that the motor rotor 3 is separated from the stator 4, and adjust the gap between the motor rotor 3 and the stator 4 to a suitable position.

[0043] Check again that the motor rotor 3 and the guide rail 22 are on the same axis. If the deviation is too large, readjustment is required.

[0044] Check and adjust the feet of each guide member of the rotor traction mechanism 1 again to ensure that the support is in place and confirm that there are no empty feet.

[0045] Rotate the hand crank 131 to slowly pull out the motor rotor 3 from the traction end where the rotor traction mechanism 1 is located. During the pulling process, always observe the gap between the stator 4 and the motor rotor 3. If the gap is too small, stop rotating the hand wheel. Re-adjust the position of the motor rotor 3 before continuing to pull out the motor rotor 3.

[0046] After the motor rotor 3 is completely pulled out, decide whether to remove the tool according to needs.

[0047] It can be understood that the above-mentioned technical features can be used in any combination without limitation.

[0048] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An APA feedwater pump motor rotor extraction device, characterized in that: include: A rotor traction mechanism (1) comprises a coupling side end support for a motor rotor (3) and drives the motor rotor (3) to move axially; The rotor support mechanism (2) includes a support for the pump side end of the motor rotor (3) and is capable of adjusting the height of the pump side end of the motor rotor (3) so that the motor rotor (3) is separated from the stator (4), allowing the rotor traction mechanism (1) to drive the motor rotor (3) to move axially and separate from the stator (4).

2. The APA feedwater pump motor rotor extraction device according to claim 1 is characterized in that: The rotor traction mechanism (1) comprises a guide frame (11) and a support seat (12) slidably mounted on the guide frame (11), and the support seat (12) is used to lock and fix the end of the motor rotor (3).

3. The APA feed water pump motor rotor extraction device according to claim 2 is characterized in that: The rotor traction mechanism (1) further comprises a first adjustment component (13) for driving the support seat (12) to slide on the guide frame (11).

4. The APA feed water pump motor rotor extraction device according to claim 3 is characterized in that: The first adjustment component (13) comprises a crank handle (131) and a gear set (132); the crank handle (131) is rotated to drive the support seat (12) to slide along the guide frame (11) via the gear set (132).

5. The APA feed water pump motor rotor extraction device according to any one of claims 2 to 4, characterized in that: The rotor traction mechanism (1) comprises a sliding seat (14) which supports the lower side of the motor rotor (3) and can be slidably matched with the guide frame (11).

6. The APA feedwater pump motor rotor extraction device according to claim 1, characterized in that: The rotor support mechanism (2) comprises a wheel clamp (21) for locking onto a backrest wheel (5), a guide rail (22) connected to the wheel clamp (21), and a support frame (23) for supporting the guide rail (22).

7. The APA feed water pump motor rotor extraction device according to claim 6 is characterized in that: The upper end of the support frame (23) is provided with a guide assembly (231) for supporting and guiding the guide rail (22).

8. The APA feed water pump motor rotor extraction device according to claim 7 is characterized in that: The guide assembly (231) comprises a rotatably arranged roller (2311), and the roller (2311) is provided with a guide groove (2312) for positioning the guide rail (22).

9. The APA feed water pump motor rotor extraction device according to claim 8, characterized in that: The guide assembly (231) further comprises a second adjustment assembly (2313) for adjusting the height position of the roller (2311).

10. The APA feedwater pump motor rotor extraction device according to claim 9, characterized in that: The second adjustment component (2313) includes a screw-connecting seat (2314) arranged on the support frame (23), a screw rod (2315) rotatably arranged on the screw-connecting seat (2314), and an adjustment seat (2316) located at the upper end of the screw rod (2315), and the roller (2311) is rotatably arranged on the adjustment seat (2316).

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