CN206246373U

CN206246373U - A kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump

Info

Publication number: CN206246373U
Application number: CN201621243785.6U
Authority: CN
Inventors: 陆金琪; 刘毅; 蒲道林
Original assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd; Shanghai Apollo Machinery Co Ltd
Current assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd; Shanghai Apollo Machinery Co Ltd
Priority date: 2016-11-17
Filing date: 2016-11-17
Publication date: 2017-06-13
Anticipated expiration: 2026-11-17

Abstract

The utility model discloses a kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump, including pump rotor and axial direction the clutch shaft bearing body, pump body structure and the second bearing body that set gradually along pump rotor, pump body structure includes pump cover and the pump housing；Pump body structure is the double volute-chamber structures of middle open type spirality；The inside of pump body structure is provided with impeller；The top of pump cover is provided with a flushing pipe device, and flushing pipe device is connected by the wash tub pipe circuit unit of two L-shaped with pump body structure.A kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump of the present utility model, is arranged symmetrically using double-entry impeller, and mutual balancing axial thrust improves the stability of pump operation；Pump configuration is horizontal middle open type structure, pump rotor part can be overhauled in the case where import and export pipeline and motor is not dismantled；Pump drive end uses cylinder roller bearing, free end uses angular contact ball bearing, the effective guarantee safe operation of pump group；Bearing lubrication uses thin oil lubricant, and is provided with fuel supplement device, can automatically compensate lubricating oil, solves the problems, such as that live repairing is difficult.

Description

A kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump

Technical field

The utility model is related to a kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump for nuclear power engineering field.

Background technology

Major function of the spent fuel pool cooling pump in nuclear power station is as follows：

1) pump constitutes cooling circuit, and plays conveying in the loop with its institute's heat exchanger in the loop, Spent Fuel Pool The effect of feed liquid, serves Spent Fuel Pool；

2) pump continuously runs with the miscellaneous equipment composition cooling circuit in its affiliated loop, takes weary combustion in Spent Fuel Pool out of The after-heat that material component is discharged, limitation sump water temperature is not higher than 50 DEG C.

Current spent fuel pool cooling pump for nuclear power station generally there are the technologies such as big volume, maintenance inconvenience, shock resistance difference Problem.Due to being limited by factory building installation site and space, even if maintenance gets up also more difficult after mounting sometimes.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of CAP1400 Nuclear Power Station's Exhausted Fuels Pond cooling pump, its compact conformation improves stability during cooling pump operation, and can conveniently be overhauled.

Realizing a kind of technical scheme of above-mentioned purpose is：A kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump, including pump turns Clutch shaft bearing body, pump body structure and second bearing body that sub and along pump rotor axial direction sets gradually, the pump body structure Including pump cover and the pump housing.

The bottom of the clutch shaft bearing body is provided with a clutch shaft bearing body case；The clutch shaft bearing body case is by the first connection Arm is connected with the pump housing；The bottom of the second bearing body is provided with a second bearing body case；The second bearing body case leads to The second linking arm is crossed to be connected with the pump housing.

The pump body structure is the double volute-chamber structures of middle open type spirality；The inside of the pump body structure is provided with impeller.

The top of the pump cover is provided with a flushing pipe device, and the flushing pipe device is by two L-shaped Wash tub pipe circuit unit is connected with the pump body structure.

Further, the pump housing along rotor axial is respectively provided on two sides with a mechanical seal；The wash tub pipe Circuit unit is connected on the upper surface of the mechanical seal.

Further, first linking arm and second linking arm are respectively equipped with one with the junction of the pump housing Individual plug.

Further, on the side wall of the close described clutch shaft bearing body of the rotor, a lubricating cup and an oil are provided with Mark.

Further, the impeller is double-entry impeller, and the impeller is provided with sealing with the contact position of the pump body structure Ring, the position contacted with the pump housing in the sealing ring is provided with steady pin.

Further, set in a cylinder roller bearing, the second bearing body in the clutch shaft bearing body and set One cylinder roller bearing and a pair of angular contact ball bearings.

A kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump of the present utility model, structure is arranged symmetrically using double-entry impeller, Mutual balancing axial thrust, improves the stability of pump operation；Pump configuration is horizontal middle open type structure, can not dismantle import and export In the case of pipeline and motor, pump rotor part is overhauled；Pump drive end uses cylinder roller bearing, and free end uses angle Contact ball bearing, the effective guarantee safe operation of pump group；Bearing lubrication uses thin oil lubricant, and is provided with fuel supplement device, can be certainly The lubricating oil of dynamic compensation loss, solves the problems, such as that live repairing is difficult.

Brief description of the drawings

Fig. 1 is a kind of structural representation sectional view of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump of the present utility model；

Fig. 2 is a kind of left view of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump of the present utility model.

Specific embodiment

In order to be able to preferably understand the technical solution of the utility model, below by specifically embodiment and combine Accompanying drawing is described in detail：

Refer to Fig. 1 and Fig. 2, a kind of CAP1400 Nuclear Power Station's Exhausted Fuels pond cooling pump, including pump rotor 1 and along pump Clutch shaft bearing body 2, pump body structure 3 and second bearing body 4 that the axial direction of rotor 1 sets gradually, pump body structure include the He of pump cover 31 The pump housing 32.

The bottom of clutch shaft bearing body 2 is provided with a clutch shaft bearing body case 21；Clutch shaft bearing body case 21 passes through the first linking arm 22 are connected with the pump housing 32；The bottom of second bearing body 4 is provided with a second bearing body case 41；Second bearing body case 41 passes through second Linking arm 42 is connected with the pump housing 32.Such structure design ensure that the structural stability of the bearing of the both sides of pump body structure 3.Connection The connection effect of arm can also reduce the Relative Vibration between the bearing that bearing causes in the motion process of rotor 1 and the pump housing, mitigate Cooling pump noise operationally.First linking arm 41 and the second linking arm 42 are respectively equipped with one with the junction of the pump housing Plug 9, strengthens the sealing between linking arm and the pump housing.

Pump body structure 3 is respectively provided on two sides with a mechanical seal 5 along rotor axial, is used to make pump cover 31 and the pump housing 32 It is connected.

The top of pump cover 31 is provided with a flushing pipe device 6, and flushing pipe device 6 is by two flushings of L-shaped Water pipe circuit unit 61 is connected with the upper surface of mechanical seal 5, can realize directly rinsing pump body structure 3.

Pump body structure 3 is the double volute-chamber structures of middle open type spirality.The inside of pump body structure 3 is provided with double-entry impeller 7, double suction leaf Wheel 7 is provided with sealing ring 71 with the contact position of pump body structure 3, and the position contacted with the pump housing in sealing ring 71 is provided with steady pin 72. Pump configuration is arranged symmetrically using double-entry impeller, can realize mutual balancing axial thrust, improves the stability of pump operation；Pump configuration It is horizontal middle open type structure, pump rotor part can be overhauled in the case where import and export pipeline and motor is not dismantled.

On the side wall of the close clutch shaft bearing body 2 of rotor 1, a lubricating cup 81 and an oil ga(u)ge 82 are provided with.Bearing lubrication Using thin oil lubricant, by setting recharging oil device, it is possible to achieve the lubricating oil of automatic compensation loss, live repairing hardly possible is solved Problem.

Set in clutch shaft bearing body 2 and a cylinder roller bearing is set in a cylinder roller bearing 23, second bearing body 4 43 and a pair of angular contact ball bearings 44, it is used to balance the residual axial force produced by rotor portion operating, make the operating of rotor steady It is fixed, reduce the noise for producing.

Those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to illustrate that this practicality is new Type, and be not used as be to restriction of the present utility model, if in spirit of the present utility model, to the above Change, the modification of embodiment will all fall in Claims scope of the present utility model.

Claims

1. A CAP1400 nuclear power plant spent fuel pool cooling pump, comprising a pump rotor, a first bearing body, a pump body structure and a second bearing body arranged in sequence along the axial direction of the pump rotor, the pump body structure includes a pump cover and The pump body is characterized by:

The bottom of the first bearing body is provided with a first bearing body box; the first bearing body box is connected with the pump body through a first connecting arm; the bottom of the second bearing body is provided with a second bearing Body box; the second bearing body box is connected to the pump body through a second connecting arm;

The pump body structure is a center-open spiral double volute structure; the pump body structure is provided with an impeller inside;

A flushing water piping device is provided on the top of the pump cover, and the flushing water piping device is connected to the pump body structure through two L-shaped flushing water piping components.

2. A CAP1400 nuclear power plant spent fuel pool cooling pump according to claim 1, wherein a mechanical seal is respectively provided on both sides of the pump body along the axial direction of the rotor; the flushing water pipeline components are connected to on the upper surface of the mechanical seal.

3. A CAP1400 nuclear power plant spent fuel pool cooling pump according to claim 1, characterized in that, the connection between the first connecting arm and the second connecting arm and the pump body is respectively provided with a wire Blocking.

4. A CAP1400 nuclear power plant spent fuel pool cooling pump according to claim 1, characterized in that an oil cup and an oil mark are provided on the side wall of the rotor close to the first bearing body.

5. A CAP1400 nuclear power plant spent fuel pool cooling pump according to claim 1, characterized in that the impeller is a double-suction impeller, and a seal ring is provided at the contact position between the impeller and the pump body structure. A fixing pin is provided at the position where the sealing ring is in contact with the pump body.

6. A CAP1400 nuclear power plant spent fuel pool cooling pump according to any one of claims 1-5, wherein a cylindrical roller bearing is arranged in the first bearing body, and a cylindrical roller bearing is arranged in the second bearing body Roller bearings and a pair of angular contact ball bearings.