CN201170186Y

CN201170186Y - Emergency pump

Info

Publication number: CN201170186Y
Application number: CNU2008200100438U
Authority: CN
Inventors: 张丽平; 扶军; 孙悦
Original assignee: SHENYANG BLOWER WORKS (GROUP) CO Ltd
Current assignee: Shenyang Blower Works Group Corporation; Shenyang Blower Works Group Nuclear Power Pump Co., Ltd.
Priority date: 2008-01-04
Filing date: 2008-01-04
Publication date: 2008-12-24
Anticipated expiration: 2018-01-04

Abstract

The utility model relates to a device for a cooling system of an emergency reactor core in a nuclear power plant, in particular to an emergency pump for maintaining the normal operating condition and the normal work in an accident operating condition of the nuclear power plant. The device comprises a pump body, a pump cover and a suspension fork component, wherein the suspension fork component is arranged on the pump body by means of the pump cover and comprises a radiating bearing body, a shaft, an angular contact ball bearing and a bearing gland. The bearing body is fixed on the pump cover, the shaft is passed through the bearing body, and the pump cover is inserted into the pump body. The shaft which is far away from one end of the pump body is provided with the angular contact ball bearing which is limited between the shaft and the bearing body, the shaft inside the bearing body is provided with an oil slinger; an inlet and an outlet which have mutually vertical axial lines are arranged on the pump body, and the inside of the pump body is provided with an impeller which is arranged on one end of the shaft. The device can be operated normally under two different operating conditions, and the axial force is balanced by the angular contact ball bearing, thereby ensuring security, reliability and stable operation of the pump. The shaft seal adopts a mechanical seal and an automatic flushing cooling, thereby reducing inconveniences probably resulted from external flushing.

Description

A kind of emergencypump

Technical field

The utility model relates to the equipment of nuclear power station emergence core stacking cool system, specifically a kind of emergencypump of safeguarding nuclear power station nominal situation and accident conditions proper functioning.

Background technique

Emergencypump is to be applied to China Atomic Energy Science Research Institute China advanced research reactor (CARR) engineering, is one of capital equipment of CARR engineering emergence core stacking cool system.In the nuclear power station that is moving, also do not have both at home and abroad with the duplicate pump of emergencypump.Because heap shape is different, heap type structure is also different, so role is just different therein for pump.Have surplus heat excavationg pump and safety injection pump of the pump close with the emergencypump function on the present nuclear power station, the both is the nuclear two stage pump.Residual heat removal pump is the pump of work under the big flow high temperature, and pressure exceeds several times than emergencypump; Safety injection pump can be divided into three kinds of high pressure, middle pressure and low pressure, and residual heat removal pump and safety injection pump are all bigger with respect to emergencypump design parameter gap.

The model utility content

The purpose of this utility model is to provide a kind of all can safeguard the normal emergencypump that moves of nuclear power station under the nominal situation of emergence core stacking cool system and under the accident conditions.

The purpose of this utility model is achieved through the following technical solutions:

The utility model comprises the pump housing, pump cover and sprung parts, sprung parts is installed on the pump housing by pump cover, wherein: sprung parts comprises bearing support, axle, angular contact ball bearing and the bearing gland that can dispel the heat, and bearing support is fixed on the pump cover, and axle passes bearing support, pump cover inserts in the pump housing; On axle away from the pump housing one end, be provided with the angular contact ball bearing that is limited between axle and the bearing support, the axle of bearing support inside is provided with disc; The pump housing has the orthogonal inlet/outlet of axis, is provided with the impeller that is installed on axle one end in the pump housing.

Wherein: also be arranged with deep groove ball bearing on the axle in the described bearing support, be equipped with vibration transducer and the platinum thermoresistance that is installed on the bearing support on itself and the angular contact ball bearing; Axle is provided with by pump cover and the fixing mechanical seal of bearing support, is connected with the pump housing by cleaning hose; Bearing support is provided with oil level and takes into account oil ga(u)ge; Be arranged with bearing gland on the described axle, be positioned at the outside of bearing support, be connected to angular contact ball bearing; Be respectively equipped with first and second on the pump housing and the bearing support and draw the leakage parts; Be connected with support on the bearing support, itself and the pump housing are installed on respectively on the base of system; Be evenly equipped with a plurality of equalizing orifices on the circumferential surface of impeller; This emergencypump is connected with motor by diaphragm coupling, and emergencypump and motor are installed on the base.

Advantage of the present utility model and good effect are:

The utility model can be under two kinds of different operating modes all can proper functioning, pump keeps axial force, by the angular contact ball bearing balance, rotor is worked under tension state, has guaranteed that the safe and reliable operation of pump is stable.

2. mechanical seal is adopted in shaft sealing of the present utility model, is the casket module integrated mechanical sealing, carries out the automated development cooling by the pump fed sheet of a media through cleaning hose, has reduced many inconvenience of adopting outer flushing to bring.

3. the bearing part of emergencypump is the suspension-type structure, adopts from oil feeding type, thin oil lubricant, and the place is provided with device for detecting temperature at bearing, and oil temperature that can monitoring bearing lubricant oil guarantees the bearing part proper functioning.

4. pump of the present utility model and motor adopt common base, and its base is a liquid collecting disc type cast structure, and the liquid port that is provided with on it adopts flange to connect, and can discharge the various leakage water of unit.

Description of drawings

Fig. 1 is a sectional drawing of the present utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a unit outline drawing of the present utility model;

Fig. 4 is the left view of Fig. 3;

Wherein: 1 is the pump housing, and 2 is pump cover, and 3 is bearing support, 4 is impeller, and 5 is axle, and 6 is bearing housing, 7 are mechanical seal, and 8 is casing ring, and 9 is impeller nut, 10 is casing wear ring, and 11 is first to draw the leakage parts, and 12 is second to draw the leakage parts, 13 is positioning rod, and 14 is air relief cock, and 15 is oil level indicator, 16 is oil ga(u)ge, and 17 is support, and 18 is vibration transducer, 19 are dustproof dish, and 20 is platinum thermoresistance, and 21 is disc, 22 is angular contact ball bearing, and 23 is cleaning hose, and 24 is bearing nut, 25 is plug, and 26 is deep groove ball bearing, and 27 are the import companion flange, 28 is pump, and 29 are the outlet companion flange, and 30 is base, 31 is diaphragm coupling, and 32 is coupling guard, and 33 is motor, 34 for base draws the leakage parts, and 35 is stone bolt.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Shown in Fig. 1～2, emergencypump 28 of the present utility model adopts single-stage (having only an impeller 4), single suction, horizontal, cantilever centrifugal pump, comprise the pump housing 1, pump cover 2 and sprung parts, sprung parts is installed on the pump housing 1 by pump cover 2, axle 5, angular contact ball bearing 22, bearing nut 4, bearing support 3 fit together, fastening bearing cap 6, refill dustproof dish 19, plug 25, air relief cock 14, positioning rod 13 composition sprung parts, the wall of bearing support 3 outside is provided with radiating fin, and the oil of the lubricant oil in can cooling bearing body 3 chambeies is warm.Bearing support 3 is fixed on the pump cover 2, and axle 5 passes bearing support 3, pump cover 2 inserts in the pump housing 1.On axle 5 away from the pump housing 1 one ends, be provided with angular contact ball bearing 22, it is between axle 5 and the bearing support 3; Be arranged with bearing gland 6 on the axle 5, be positioned at the outside of bearing support 3, be connected to angular contact ball bearing 22.The axial force that emergencypump produces in running can be born by angular contact ball bearing 22.Getting rid of of axle 5 in bearing support 3 inside is provided with disc 21 in the oil groove, guaranteed the lubricated of bearing.The pump housing 1 has the orthogonal inlet/outlet of axis, is provided with impeller 4 in the pump housing 1, and it is installed on an axle end of 5 by key, impeller nut 9 tightly.Be evenly equipped with a plurality of equalizing orifices 36 on the circumferential surface of impeller 4, from the indrawn water of import impeller produced impact force, a plurality of equalizing orifices 36 on the impeller 4 can make part water pass through, and the impact force that reaches the water that impeller 4 two sides are subjected to reaches balance.Also be arranged with mechanical seal 7 and deep groove ball bearing 26 on the axle 5 in bearing support 3 chambeies, be equipped with vibration transducer 18 and the platinum thermoresistance 20 that is installed on the bearing support 3 on deep groove ball bearing 26 and the angular contact ball bearing 22, because angular contact ball bearing 22 and deep groove ball bearing 26 high speed rotating, platinum thermoresistance 20 can be used to monitor the oil temperature of two bearings lubricant oil.Mechanical seal 7 is unit loading type, fastens by

pump cover

2 and 3 of bearing suppories.The pump housing 1 is connected with the pump housing 1 by cleaning hose 23, and the water of drawing from the pump housing 1 is undertaken having reduced the inconvenience that adopts outer flushing to bring from flushing and cooling by 23 pairs of mechanical seals of cleaning hose 7.Bearing support 3 is provided with oil level indicator 15 and oil ga(u)ge 16, be used for lubricating oil filling and the monitoring oil level.Casing wear ring 10, throat's lining and pump cover 2 assemblings are tightly together; Casing ring 8 is enclosed on the pump housing 1, and the sealing gasket between the pump housing 1 and the pump cover 2 is installed on the sealing surface of pump cover 2, and connecting bolt and nut link together the pump housing 1 and pump cover 2.The pump housing 1 is provided with first at close pump pin place and draws leakage parts 11, is used for carrying out pump housing desanding and draws the leakage body; Bearing support 3 is provided with second and draws leakage parts 12, is used for drawing the water that leaks mechanical seal 7 leakages.Be connected with support 17 on the bearing support 3, itself and the pump housing are installed on respectively on the base 30 of system.

Shown in Fig. 3～4, emergencypump 28 is connected with motor 33 by diaphragm coupling 31, and coupling guard 32 is installed on the base 30, is used for protecting diaphragm coupling 31.Emergencypump 28 is installed on the base 30 with motor 33.

Emergencypump of the present utility model is 2 grades of pumps of nuclear safety, and antidetonation I class axially sucks, radially spues, and inlet/

outlet companion flange

27,29 is a tongue and groove butt welding steel pipe flanges, and bearing adopts the rolling bearing of thin oil selflubricating.Pump is with stack operation, and emergencypump provided power source from piling to absorb water and water is injected into plate type heat exchanger in the pond for the pond water cooling when heap normally moved, and under accident conditions, emergencypump injects reactor core with Chi Shui and takes the reactor core liberated heat out of.

Claims

1. emergencypump, it is characterized in that: comprise the pump housing (1), pump cover (2) and sprung parts, sprung parts is installed on the pump housing (1) by pump cover (2), wherein: sprung parts comprises bearing support (3), axle (5), angular contact ball bearing (22) and the bearing gland (6) that can dispel the heat, bearing support (3) is fixed on the pump cover (2), and axle (5) passes bearing support (3), pump cover (2) inserts in the pump housing (1); On axle (5) away from the pump housing (1) one end, be provided with the angular contact ball bearing (22) that is limited between axle (5) and the bearing support (3), the inner axle (5) of bearing support (3) is provided with disc (21); The pump housing (1) has the orthogonal inlet/outlet of axis, is provided with the impeller (4) that is installed on axle (5) one ends in the pump housing (1).

2. by the described emergencypump of claim 1, it is characterized in that: also be arranged with deep groove ball bearing (26) on the axle (5) in the described bearing support (3), be equipped with vibration transducer (18) and the platinum thermoresistance (20) that is installed on the bearing support (3) on itself and the angular contact ball bearing (22).

3. by the described emergencypump of claim 1, it is characterized in that: described axle (5) is provided with by pump cover (2) and the fixing mechanical seal (7) of bearing support (3), is connected with the pump housing (1) by cleaning hose (23).

4. by the described emergencypump of claim 1, it is characterized in that: described bearing support (3) is provided with oil level indicator (15) and oil ga(u)ge (16).

5. by the described emergencypump of claim 1, it is characterized in that: be arranged with bearing gland (6) on the described axle (5), be positioned at the outside of bearing support (3), be connected to angular contact ball bearing (22).

6. by the described emergencypump of claim 1, it is characterized in that: be respectively equipped with first and second on the described pump housing (1) and the bearing support (3) and draw leakage parts (11,12).

7. by the described emergencypump of claim 1, it is characterized in that: be connected with support (17) on the described bearing support (3), itself and the pump housing are installed on respectively on the base (30) of system.

8. by the described emergencypump of claim 1, it is characterized in that: be evenly equipped with a plurality of equalizing orifices (36) on the circumferential surface of described impeller (4).

9. by the described emergencypump of claim 1, it is characterized in that: this emergencypump (28) is connected with motor (33) by diaphragm coupling (31), and emergencypump (28) is installed on the base (30) with motor (33).