Search

CN-122014633-A - Vertical metal seawater circulating pump with adjustable blades for nuclear power station

CN122014633ACN 122014633 ACN122014633 ACN 122014633ACN-122014633-A

Abstract

The application discloses an adjustable vane vertical metal seawater circulating pump for a nuclear power station, which relates to the technical field of seawater circulating pumps and comprises a connecting pipe, a bracket, a pump shaft, a protective sleeve, a water lubrication bearing, a water outlet elbow, a motor, a guide vane body, an impeller chamber, a suction horn and an impeller body, wherein a filler sealing component is arranged between the water outlet elbow and the pump shaft, the impeller body consists of a hub and a vane body, the circumference of the vane body is uniformly distributed on the outer surface of the hub, the vane body carries out angle adjustment on the vane body through hydraulic oil, a pump set adopts a core-pulling structure, and the maintenance of the rotor component of the pump can be carried out only by extracting the rotor component of the pump under the condition that the suction horn, the connecting pipe and the water outlet elbow are not removed.

Inventors

  • LU JINQI
  • WU ZHIBIN
  • SONG LI
  • ZHAO CAN
  • ZHANG BIWEN
  • ZHENG HAIXIA
  • WANG JIANJUN
  • LI YUNPENG
  • GENG LELE
  • GUO JINPAN

Assignees

  • 上海阿波罗机械股份有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. The utility model provides an adjustable blade vertical metal sea water circulating pump for nuclear power station, including connecting pipe (6) and support (12), the inside of connecting pipe (6) runs through and is provided with pump shaft (5), the top of connecting pipe (6) is provided with sheath pipe (7), the inside of sheath pipe (7) is provided with water lubrication bearing (8), the top of sheath pipe (7) is provided with out water return bend (9), the inside of support (12) is provided with motor (13), the output shaft of motor (13) is connected with pump shaft (5) through shaft coupling (11), be provided with packing seal part (10) between out water return bend (9) and pump shaft (5), the bottom of connecting pipe (6) is provided with stator (3), the inside of stator (3) is provided with impeller chamber (2), the bottom of stator (3) is provided with suction loudspeaker (1), the inside of impeller chamber (2) is provided with impeller body (4), impeller body (4) are by wheel hub (41), blade body (42), the blade body (42) is equipped with the angle of impeller body (42) is at the wheel hub (41), the outer surface of impeller body (42) is adjusted through the angle equipartition; The pump set adopts a core-pulling structure, and only the rotor component of the pump is required to be pulled out without dismantling the suction horn (1), the connecting pipe (6) and the water outlet elbow pipe (9).
  2. 2. The vertical metal sea water circulating pump with adjustable blades for the nuclear power plant according to claim 1, wherein the output shaft of the motor (13) is rigidly connected with the pump shaft (5), and the coupler (11) transmits torque generated by the motor (13) from the output shaft of the motor (13) to the main shaft of the pump shaft (5) and transmits thrust of the pump to a thrust bearing at the top of the motor (13).
  3. 3. The adjustable vane vertical type metal seawater circulating pump for a nuclear power plant according to claim 1, wherein the suction horn (1) is used for introducing water flow into the impeller body (4), and the suction horn (1) is in a horn shape.
  4. 4. The vertical metal sea water circulating pump with adjustable blades for the nuclear power station, which is disclosed in claim 1, is characterized in that the guide vane body (3) is made of a double-phase stainless steel cast blade, welding is adopted between an outer ring and an inner ring and between the outer ring and the blade, the guide vane body (3) converts a medium speed head at the outlet of the blade into pressure energy, and liquid flow is collected through the connecting pipe (6) to be guided to the water outlet elbow pipe (9) and is conveyed to the water outlet pipeline.
  5. 5. The adjustable vane vertical type metal seawater circulating pump for the nuclear power plant according to claim 1, wherein the water outlet elbow pipe (9) is a guide part for turning the flow direction of water from the vertical direction to the horizontal direction, and the inner wall of the water outlet elbow pipe is smooth.
  6. 6. The vertical metal sea water circulating pump with adjustable blades for the nuclear power station, which is disclosed in claim 1, is characterized in that a guide cover is arranged at the outlet of the protective sleeve (7), the guide cover is provided with a smooth streamline, and a plurality of reinforcing ribs are welded between the protective sleeve (7) and the guide cover.
  7. 7. The vertical metal seawater circulating pump with adjustable blades for the nuclear power plant according to claim 1, wherein the water lubrication bearing (8) is a guide bearing made of high polymer material, the guide bearing allows the main shaft to axially move in the guide bearing, and each bearing is provided with an independent flushing water pipe.
  8. 8. The vertical metal seawater circulating pump with adjustable blades for a nuclear power plant according to claim 1, wherein one side of the blade body (42) is provided with an adjusting arm (43), the adjusting arm (43) is located inside the blade body (42), the pump shaft (5) penetrates through the inside of the hub (41), an oil cylinder I (54) and an oil cylinder II (55) for adjusting hydraulic oil are arranged inside the pump shaft (5), a cylinder (51) is fixedly arranged on the outer surface of the pump shaft (5), a piston rod (52) is slidably arranged inside the cylinder (51), the piston rod (52) penetrates through the inside of the cylinder (51), a connecting rod (53) is rotatably connected with the outer ring of the piston rod (52), the connecting rod (53) is rotatably connected with the adjusting arm (43), the driving connecting rod (53) is moved up and down through the piston rod (52) to enable the blade body (42) to rotate clockwise or anticlockwise, and a buffer device is arranged on the inner wall of the hub (41).
  9. 9. The vertical metal seawater circulating pump with adjustable blades for a nuclear power plant according to claim 8, wherein the buffering device comprises a fixed cylinder (56) fixedly arranged inside a hub (41), a movable column (57) which is connected inside the fixed cylinder (56) in a sliding mode is rotatably arranged on the outer surface of the adjusting arm (43), a damper (59) used for absorbing and consuming the impact energy of external force on the blades is fixedly connected between the movable column (57) and the inner wall of the fixed cylinder (56), a return spring (58) is fixedly connected between the movable column (57) and the inner wall of the fixed cylinder (56), and the return spring (58) is sleeved on the outer surface of the damper (59) and used for enabling the movable column (57) to recover to an initial position after the movable column (57) is impacted.
  10. 10. The vertical metal seawater circulating pump with adjustable blades for a nuclear power plant according to claim 1, wherein the bracket (12) is of a welded structure, and is integrally sprayed with anti-corrosion paint.

Description

Vertical metal seawater circulating pump with adjustable blades for nuclear power station Technical Field The application relates to the technical field of seawater circulating pumps, in particular to a vertical metal seawater circulating pump with adjustable blades for a nuclear power station. Background The vertical adjustable vane metal seawater circulating pump for the nuclear power station is key equipment of a circulating water system of a nuclear island, the operation reliability of the circulating water system is directly related to the safety and the efficiency of the power station, and the circulating water system has the function of providing necessary cooling water quantity for a condenser of a steam turbine and a heat exchanger of a conventional island auxiliary cooling water system during the operation of a unit. The vertical metal sea water circulating pump of adjustable blade that is applied to among the prior art at present for the nuclear power station, its blade adjustment mechanism design is comparatively complicated, and partial structure exposes outside, has not only increased the overall dimension of equipment, still receives sea water corrosion and external environmental factor's influence easily, and in addition some adjustment mechanism is when realizing blade angle adjustment, and the transmission process is not direct enough and high-efficient, has the problem that energy loss and regulation response are slow, is difficult to satisfy the nuclear power station to sea water circulating pump high efficiency, accurate strict requirement of adjusting. Disclosure of Invention In order to improve the problem that the external hydraulic cylinder is easy to influence from the outside and the transmission process is not direct, the application provides an adjustable vane vertical metal seawater circulating pump for a nuclear power station. The application provides a vertical metal seawater circulating pump with adjustable blades for a nuclear power station, which adopts the following technical scheme: The utility model provides a vertical metal sea water circulating pump of adjustable blade for nuclear power station, includes connecting pipe and support, the inside of connecting pipe runs through and is provided with the pump shaft, the top of connecting pipe is provided with the sheath pipe, the inside of sheath pipe is provided with water lubricated bearing, the top of sheath pipe is provided with the water return bend, the inside of support is provided with the motor, the output shaft of motor passes through the shaft coupling and is connected with the pump shaft, be provided with the packing seal part between water return bend and the pump shaft, the bottom of connecting pipe is provided with the stator body, the inside of stator body is provided with the impeller room, the bottom of stator body is provided with the suction loudspeaker, the inside of impeller room is provided with the impeller body, the impeller body is mixed flow impeller body, the impeller body comprises wheel hub, blade body circumference equipartition at the surface of wheel hub, the impeller body carries out angle modulation to its blade body through hydraulic oil; The pump set adopts a core-pulling structure, and only the rotor part of the pump is required to be pulled out under the condition that the suction horn, the connecting pipe and the water outlet elbow pipe are not dismounted. Through adopting above-mentioned technical scheme, this circulating pump comprises a vertical whole by core components such as connecting pipe, the support, the sheath pipe, go out the water return bend, motor, wherein, the connecting pipe is inside runs through the pump shaft, the sheath pipe is connected gradually at the top and go out the water return bend, the bottom is through the stator body coupling suction loudspeaker, form complete runner, the support is used for supporting the motor at top, the motor passes through the shaft coupling drive pump shaft, the impeller adopts mixed flow formula design, its blade angle accessible hydraulic system adjusts, most importantly, whole pump group has adopted "can loose core structure", this means when overhauling, need not to dismantle the large-scale fixed part such as suction loudspeaker, connecting pipe and water return bend, only need with including impeller, the rotor parts whole extraction that goes out the water return bend, thereby greatly shortened maintenance time, the economic nature and the security of nuclear power station operation have been improved, and seawater circulating water pump adopts single-stage singly inhale, adjustable blade mixed flow pump structure, can adapt to different operating requirements in a flexible way, ensure that the system is stable operation near the high-efficient region, show promotion energy utilization efficiency, and be equipped with hydraulic pressure adjustment mechanism, support real-time adjustment blade angle, it can respond to chan