Priming drive for motor of electric feed pump

Abstract

The application relates to a turning gear driving device of an electric water supply pump motor, which comprises a sliding block assembly for sleeving an outer ring of a backrest wheel of the water supply pump motor, a driving structure comprising a driving wheel matched with the outer periphery of the sliding block assembly and a driving assembly for driving the driving wheel to rotate, and the outer ring of the sliding block assembly and the inner ring of the driving wheel are bevels, when the driving wheel moves relative to the sliding block assembly in the axial first direction of the backrest wheel, the driving wheel is pressed to the sliding block assembly, the sliding block assembly clamps the backrest wheel, and when the driving assembly drives the driving wheel to rotate, the sliding block assembly drives the backrest wheel and the rotor to rotate. After the driving wheel and the sliding block assembly are locked and axially moved to press the sliding block assembly and make the sliding block assembly clamp the backrest wheel, the driving assembly drives the driving wheel, the sliding block assembly and the rotor to rotate, the electric turning gear work of the rotor of the electric water supply pump motor is realized, the work efficiency of motor maintenance is improved, the labor cost is saved, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear power, and more specifically, to a turning gear drive device for an electric feedwater pump motor. Background Technology

[0002] The electric feedwater pump is a crucial piece of equipment in the evaporator feedwater system, primarily composed of a booster pump, an AC motor, a hydraulic coupling, a pressure stage pump, and a coupling. The electric feedwater pump motor is a three-phase squirrel-cage asynchronous motor, with one specification as follows: power: 10500 kW; speed: 1495 rpm; operating voltage: 6600 V; rotor assembly weight: 7.8 tons; total motor weight: 33.4 tons; bearing type: sliding bearing with forced lubrication; distance from the center of the backrest wheel to the ground: 1290 mm.

[0003] The electric feedwater pump motor in nuclear power plants is a heavy-duty high-voltage asynchronous motor. During major overhauls or routine maintenance, the pump unit needs to rotate the motor rotor to find the center of the wheel. When rotating the rotor during equipment maintenance, the traditional method of using clamping tools for manual rotation is laborious, time-consuming, and poses industrial safety risks to personnel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a turning gear drive device for an electric water pump motor, which addresses the above-mentioned deficiencies of the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is: constructing a turning gear drive device for an electric water pump motor, comprising:

[0006] A slider assembly for fitting onto the outer ring of the back wheel of the water pump motor;

[0007] The driving structure includes a driving wheel that engages with the outer periphery of the slider assembly, and a driving assembly that drives the driving wheel to rotate.

[0008] The outer ring of the slider assembly and the inner ring of the drive wheel are inclined surfaces. When the drive wheel moves relative to the slider assembly in the first axial direction of the backrest wheel, the drive wheel presses against the slider assembly, allowing the slider assembly to clamp the backrest wheel. When the drive assembly drives the drive wheel to rotate, the slider assembly drives the backrest wheel and the rotor to rotate.

[0009] In some embodiments, the slider assembly includes at least two arc-shaped sliders distributed along the outer periphery of the backrest wheel, with a gap between some or any two adjacent sliders to retract and clamp the backrest wheel.

[0010] In some embodiments, the inner ring of the drive wheel is flared, and the outer ring of the slider is an inclined surface corresponding to the shape of the inner ring of the drive wheel. The angle between the inclined surface of the outer ring of the slider and the axis ranges from 3° to 30°.

[0011] In some embodiments, the drive wheel is provided with a locking part that engages with the slider assembly. When the locking part is engaged with the slider assembly, it drives the drive wheel to move relative to the slider assembly in a first direction, generating a radial pressing force on the slider assembly to clamp the backrest wheel. When the locking part is unlocked from the slider assembly, the drive wheel and the slider assembly move relative to each other in a second direction away from the first direction, releasing the slider assembly.

[0012] In some embodiments, the locking part is located at one end of the slider assembly, the locking part is provided with a locking fastener, and the slider assembly is provided with a connecting hole for the locking fastener to engage.

[0013] In some embodiments, the drive wheel is a turbine, and the drive assembly includes a transmission element meshing with the drive wheel; or, the drive wheel is a gear, and the drive assembly includes a gear shaft meshing with the drive wheel.

[0014] In some embodiments, the transmission member is located outside the drive wheel, and the axis of the transmission member forms an angle with the axis of the drive wheel.

[0015] In some embodiments, the drive assembly further includes a drive motor for rotating the transmission member and a reduction mechanism disposed between the drive motor and the transmission member.

[0016] In some embodiments, the turning gear drive device further includes a support structure, the support structure including a support body and a base supporting the support body, the support body covering the drive wheel, and the drive wheel rotatingly engaging with the support body.

[0017] In some embodiments, the drive wheel includes a wheel body and flanges extending outward at both ends of the wheel body. The support body is provided with two rotating seats that respectively cooperate with the outer rings of the flanges at both ends. The wheel body is located between the two rotating seats and is spaced apart from the two rotating seats to reserve space for axial movement of the drive wheel.

[0018] The rotating drive device for the electric water pump motor of the present invention has the following beneficial effects: after the drive wheel and the slider assembly are locked together to generate axial movement and press the slider assembly, and after the slider assembly clamps the back wheel, the drive assembly rotates to drive the drive wheel, the slider assembly, and the rotor to rotate, thereby realizing the electric rotating operation of the electric water pump motor rotor, which improves the work efficiency of motor maintenance, saves labor costs, and enhances safety. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0020] Figure 1 This is a cross-sectional structural diagram of the rotating gear drive device installed on the electric water pump motor in an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 A side view of the trolley drive unit installed on the electric water pump motor. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] like Figure 1 , 2 As shown, the electric water pump motor includes a rotor 11 and a backrest wheel 12 sleeved on the rotor 11. In a preferred embodiment of the present invention, the turning drive device 20 includes a slider assembly 21, a drive structure 22, and a support structure 23. The slider assembly 21 is used to be sleeved on the outer ring of the backrest wheel 12 of the water pump motor. When not in operation, the slider assembly 21 can move axially on the backrest wheel 12. The drive structure 22 includes a drive wheel 221 that cooperates with the outer periphery of the slider assembly 21 and a drive assembly 222 that drives the drive wheel 221 to rotate. The support structure 23 can provide support for the drive structure 22 and ensure the stability of the drive structure 22. Preferably, the support structure 23 is usually connected to the ground.

[0024] The outer ring of the slider assembly 21 and the inner ring of the drive wheel 221 are inclined surfaces. When the drive wheel 221 moves relative to the slider assembly 21 in the first axial direction A of the backrest wheel 12, the drive wheel 221 presses against the slider assembly 21, allowing the slider assembly 21 to clamp the backrest wheel 12. When the drive assembly 222 drives the drive wheel 221 to rotate, the slider assembly 221 drives the backrest wheel 12 and the rotor 11 to rotate.

[0025] After the drive wheel 221 and the slider assembly 21 are locked together, the slider assembly 21 is pressed into place by axial movement. After the slider assembly 21 clamps the back wheel 12, the drive assembly 222 rotates to drive the drive wheel 221, the slider assembly 21 and the rotor 11 to rotate, thereby realizing the electric turning operation of the rotor 11 of the electric water pump motor. This improves the efficiency of motor maintenance, saves labor costs and enhances safety.

[0026] The slider assembly 21 includes two arc-shaped sliders distributed along the outer periphery of the backrest wheel 12. Preferably, the sliders are semi-circular, with a gap between their joints, so that they can retract and clamp the backrest wheel 12 under the pressing force after the drive wheel 221 moves axially. In other embodiments, the number of sliders may be more than two, distributed along the outer periphery of the backrest wheel 12, with a gap between some or any two adjacent sliders to reserve space for retracting and clamping the backrest wheel 12.

[0027] The inner ring of the drive wheel 221 is flared, and the outer ring of the slider is an inclined surface corresponding to the shape of the inner ring of the drive wheel 221. When the drive wheel 221 moves back and forth along the axial direction of the rotor 11, it can retract to clamp or release the slider. After the radial force of the drive wheel 221 is removed, the sliders can be connected to each other, or they can be limited by the positioning structure to prevent them from scattering. Preferably, the angle between the inclined surface of the outer ring of the slider and the axis is in the range of 3° to 30°, which allows the pressure generated by the drive wheel 221 on the slider assembly 21 to be transmitted radially, so that the slider assembly 21 clamps the back wheel 12.

[0028] In some embodiments, the drive wheel 221 is provided with a locking part 2211 that locks with the slider assembly 21. Preferably, the locking part 2211 is located at one end of the slider assembly 21, and the locking part 2211 is provided with a locking fastener 2212. The slider assembly 21 is provided with a connecting hole for the locking fastener 2212 to lock. When the locking fastener 2212 is locked or released, the drive wheel 221 can be driven to move back and forth axially relative to the slider assembly 21, thereby realizing the clamping and releasing of the drive wheel 221 on the slider assembly 21.

[0029] Specifically, when the locking part 2211 is locked with the slider assembly 21, the locking part 2211 will move closer to the slider assembly 21, causing the drive wheel 221 to move relative to the slider assembly 21 in the first direction A, generating a radial pressing force on the slider assembly 21 to clamp the backrest wheel 12. When the locking part 2211 is unlocked from the slider assembly 21, the locking part moves away from the slider assembly 21, causing the drive wheel 221 to move relative to the slider assembly 21 in the second direction away from the first direction A, releasing the slider assembly 21. Under the force of the slider assembly 21 spreading out, it is released from the backrest wheel 12.

[0030] Preferably, in this embodiment, the drive wheel 221 is a turbine, and the drive assembly 222 includes a transmission component 2221 that cooperates with the drive wheel 221, a drive motor 2222 that drives the transmission component 2221 to rotate, and a reduction mechanism 2223 disposed between the drive motor 2222 and the transmission component 2221. The transmission component 2221 is a worm gear. When the drive motor 2222 is working, the rotation speed of the transmission component 2221 is controlled by the reduction speed of the reduction mechanism 2223, thereby adjusting the rotation speed and rotation position of the turbine.

[0031] In this embodiment, the transmission component 2221 is located outside the drive wheel 221, and the axis of the transmission component 2221 forms an angle with the axis of the drive wheel 221. Preferably, the axis of the transmission component 2221 is perpendicular to the axis of the drive wheel 221, which allows the direction of the transmission component 2221 to be parallel to the end face of the rotor 11, thereby reducing the external space occupied.

[0032] In other embodiments, the drive wheel 221 may also be a gear, and the drive assembly 222 includes a gear shaft that meshes with the drive wheel 221. When the drive motor 2222 is working, the rotation speed of the gear shaft is controlled by the reduction mechanism 2223 to adjust the rotation speed and rotation position of the drive wheel 221.

[0033] The drive wheel 221 includes a wheel body 2213 and flanges 2214 extending outward at both ends of the wheel body 2213. The support structure 23 can support the flanges 2214, maintain the height position of the drive wheel 221, and allow the drive wheel 221 to rotate and move axially on the support structure 23.

[0034] The support structure 23 includes a support body 231 and a base 232 that supports the support body 231. The support body 231 is covered by the drive wheel 221, and the drive wheel 221 rotates with the support body 231.

[0035] The support body 231 is provided with two rotating seats 233 that respectively cooperate with the outer ring of the flange 2214 at both ends. The wheel body 2213 is located between the two rotating seats 233 and is spaced apart from the two rotating seats 233, leaving space for the axial movement of the drive wheel 221.

[0036] Furthermore, the rotating seat 233 is provided with guide sleeves 234 that cooperate with the outer rings of the flanges 2214 at both ends, which can support the flanges 2214 and allow the flanges 2214 to move axially on the guide sleeves 234.

[0037] The friction between the slider assembly 21 and the backrest wheel 12, as well as the force acting on the outer circle of the backrest wheel 12 when the motor rotor 11 rotates, can be calculated based on the actual structure and materials. The friction between the backrest wheel 12 and the slider assembly 21 is greater than the force acting on the outer circle of the backrest wheel 12 when the rotor 11 rotates, so that the backrest wheel 12 will not slip with the slider assembly 21 when it rotates.

[0038] The transmission component 2221 and the drive wheel 221 cooperate with the drive motor 2222 and the reduction mechanism 2223 to form a drive mechanism. The power of the drive motor 2222, the transmission ratio of the reduction mechanism 2223, and the transmission ratio between the transmission component 2221 and the drive wheel 221 can be calculated and matched parts can be selected. When the drive motor 2222 starts, the transmission component 2221 generates torque on the drive wheel 221. The base 232 of the support structure 23 is inserted into the preset pit to form a reverse torque. When the torque of the transmission component 2221 is equal to the reverse torque, the support body 231 and the base 232 remain stationary. When the torque generated by the transmission component 2221 is greater than the friction of the sliding bearing, the back wheel 12 and the motor rotor 11 rotate simultaneously.

[0039] Understandably, the above-mentioned technical features can be used in any combination without restriction.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A turning gear for an electric feed water pump motor characterized by, include: A slider assembly (21) is used to fit onto the outer ring of the back wheel (12) of the water pump motor; The drive structure (22) includes a drive wheel (221) that engages with the outer periphery of the slider assembly (21) and a drive assembly (222) that drives the drive wheel (221) to rotate. The outer ring of the slider assembly (21) and the inner ring of the drive wheel (221) are inclined. When the drive wheel (221) moves relative to the slider assembly (21) in the first axial direction (A) of the backrest wheel (12), the drive wheel (221) presses against the slider assembly (21), allowing the slider assembly (21) to clamp the backrest wheel (12). When the drive assembly (222) drives the drive wheel (221) to rotate, the slider assembly (21) drives the backrest wheel (12) and the rotor (11) to rotate. The slider assembly (21) includes at least two arc-shaped sliders distributed along the outer periphery of the backrest wheel (12), with a gap between some or any two adjacent sliders to retract and clamp the backrest wheel (12).

2. A spinning drive for an electric water pump motor according to claim 1, characterized in that The inner ring of the drive wheel (221) is flared, and the outer ring of the slider is an inclined surface corresponding to the shape of the inner ring of the drive wheel (221). The angle between the inclined surface of the outer ring of the slider and the axis ranges from 3° to 30°.

3. The spinning motor drive of an electric water pump motor of claim 1, wherein, The drive wheel (221) is provided with a locking part (2211) that locks with the slider assembly (21). When the locking part (2211) locks with the slider assembly (21), it drives the drive wheel (221) to move relative to the slider assembly (21) in a first direction (A), generating a radial pressing force on the slider assembly (21) to clamp the backrest wheel (12). When the locking part (2211) unlocks from the slider assembly (21), the drive wheel (221) moves relative to the slider assembly (21) in a second direction away from the first direction (A), releasing the slider assembly (21).

4. The turning drive device for the electric water pump motor according to claim 3, characterized in that, The locking part (2211) is located at one end of the slider assembly (21), and the locking part (2211) is provided with a locking fastener (2212). The slider assembly (21) is provided with a connecting hole for the locking fastener (2212) to lock.

5. The turning gear drive device for the electric water pump motor according to claim 1, characterized in that, The drive wheel (221) is a turbine, and the drive assembly (222) includes a transmission element (2221) meshing with the drive wheel (221); or, the drive wheel (221) is a gear, and the drive assembly (222) includes a gear shaft meshing with the drive wheel (221).

6. The turning drive device for the electric water pump motor according to claim 5, characterized in that, The transmission component (2221) is located outside the drive wheel (221), and the axis of the transmission component (2221) forms an angle with the axis of the drive wheel (221).

7. The turning gear drive device for the electric feedwater pump motor according to claim 5 or 6, characterized in that, The drive assembly (222) further includes a drive motor (2222) that drives the transmission member (2221) to rotate, and a reduction mechanism (2223) disposed between the drive motor (2222) and the transmission member (2221).

8. The turning gear drive device for the electric feedwater pump motor according to any one of claims 1 to 6, characterized in that, The turning drive device (20) further includes a support structure (23), which includes a support body (231) and a base (232) supporting the support body (231). The support body (231) is covered outside the drive wheel (221), and the drive wheel (221) rotates with the support body (231).

9. The turning gear drive device for the electric water pump motor according to claim 8, characterized in that, The drive wheel (221) includes a wheel body (2213) and flanges (2214) extending outward from both ends of the wheel body (2213). The support body (231) is provided with two rotating seats (233) that respectively cooperate with the outer rings of the flanges (2214) at both ends. The wheel body (2213) is located between the two rotating seats (233) and is spaced apart from the two rotating seats (233) to reserve space for the axial movement of the drive wheel (221).

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