CN212508860U - Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant - Google Patents
Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant Download PDFInfo
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- CN212508860U CN212508860U CN202021913458.3U CN202021913458U CN212508860U CN 212508860 U CN212508860 U CN 212508860U CN 202021913458 U CN202021913458 U CN 202021913458U CN 212508860 U CN212508860 U CN 212508860U
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Abstract
The utility model discloses a two-loop emergency water-replenishing diesel engine pump set and a system for a nuclear power plant, which are used for solving the problem of the two-loop emergency water replenishing of the nuclear power plant; the two-loop emergency water-replenishing diesel engine pump set system is mainly composed of a horizontal multistage centrifugal pump head, a diesel engine, an inlet water tank, a coupler, an outlet adjusting valve, an outlet flowmeter, an inlet and outlet pipeline and the like, the diesel engine and the pump are installed on an integral base, the pump head and the diesel engine are connected through a diaphragm coupler, the whole set of pump set system is installed inside a carriage, when an emergency occurs, the starting of the pump set can be realized without providing energy to the outside, and the reliability of the emergency system is improved.
Description
Technical Field
The utility model belongs to the emergency field of nuclear power station; relates to a two-loop emergency water-replenishing diesel engine pump technology; in particular to a two-loop emergency water replenishing diesel engine pump set and a system for a nuclear power plant.
Background
The emergency water-replenishing diesel engine pump with the two loops is used for being operated within 2.5 hours after an accident, is used for replenishing water to a steam generator after the accident, drives the rotor to rotate by the diesel engine, drives the rotor of the pump to rotate by the speed increasing box and the coupler, continuously transmits energy to conveying liquid (water or water containing boron) by depending on the power action of a rotating impeller on the liquid, increases the kinetic energy (mainly) and the pressure energy of the liquid, then converts the kinetic energy into the pressure energy by the extrusion chamber of the pump cavity, and when the liquid is thrown out from the impeller, the central part of the impeller causes a low-pressure area to form a pressure difference with the pressure of the sucked liquid level, so that the liquid is continuously sucked and discharged at a certain pressure, and the liquid is continuously conveyed out;
under the condition that a loop is complete, natural circulation can be established to the reactor core, through two return circuit atmosphere blow-off valves of manual opening, rely on steam generator exhaust reactor core waste heat, the atmospheric blow-off valve is opened the back, and steam generator secondary side cooling water can lose in a large number, need be to steam generator secondary side moisturizing this moment to guarantee the long-term cooling of reactor core. In order to realize continuous water replenishing of the steam generator under the condition of long-term power loss, corresponding water replenishing facilities and modes are required to be arranged. If the steam pressure of the steam generator can maintain the operation of the steam pump of the auxiliary water supply system of the steam generator under the accident condition, an emergency water supplement measure needs to be added for the auxiliary water supply tank, water can be continuously supplemented, and the requirement of water supplement amount is met. And along with the development of the accident, steam pressure that steam generator produced probably can't continue to promote the steam-operated supplementary water feed pump, and electronic supplementary water feed pump also can't obtain the power supply simultaneously, even carry out the moisturizing through supplementary water feed tank newly-increased emergent moisturizing passageway and also can't realize steam generator's moisturizing operation to supplementary water tank this moment to the waste heat discharge of reactor core can't be realized. Therefore, in this case, an emergency water replenishing channel for directly replenishing water to the steam generator needs to be added, and the emergency water replenishing channel has a function of continuously replenishing water, so as to ensure the water level of the secondary side of the steam generator, and manually open the atmospheric vent valve to exhaust the residual heat of the reactor core in the manner of exhausting the atmosphere by the steam turbine bypass system.
In view of the above two points, a two-loop emergency water replenishing diesel engine pump set and a system for a nuclear power plant need to be designed, and a proper mode is adopted for water replenishing, so that the accident expansion is avoided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a nuclear power plant is with emergent moisturizing diesel engine pump package of two return circuits and system for solve the problem of the emergent moisturizing of two return circuits of nuclear power station.
The purpose of the utility model can be realized by the following technical scheme:
a two-loop emergency water-replenishing diesel engine pump set and a system for a nuclear power plant comprise a diesel pump, wherein one end of the diesel pump is provided with a pump head, the pump head is connected with a diaphragm coupling, and the other end of the diaphragm coupling is connected with an engine; a water inlet is formed in one end, close to the pump head, of the diesel pump, the water inlet is connected with a pump water inlet pipe, a pressure vacuum meter is arranged between the water inlet and the pump water inlet pipe, and the pressure vacuum meter is installed on one side close to the water inlet;
the other end of the pump water inlet pipe is connected to a two-loop emergency water replenishing pump water tank, and the two-loop emergency water replenishing pump water tank is provided with an exhaust valve and a liquid discharge valve;
a water tank inlet pipe is arranged on one side, away from the pump inlet pipe, of the water tank of the two-loop emergency water replenishing pump, and a metal winding graphite gasket is arranged between the water tank inlet pipe and the water tank of the two-loop emergency water replenishing pump;
one side of the diesel pump, which is far away from the pump water inlet pipe, is provided with a pump water outlet pipe, the other side of the pump water outlet pipe is connected with a buffer pipe provided with a pressure gauge, the other side of the buffer pipe is connected with a flowmeter water outlet pipe provided with an electromagnetic flowmeter, the other side of the flowmeter water outlet pipe is connected with an outlet regulating valve, and the other side of the outlet regulating valve is connected with a regulating valve water outlet pipe.
Furthermore, a bottom plate is arranged at the bottom end of the diesel pump, the diesel pump and the engine are both fixed on the bottom plate, and the bottom plate is provided with a drain hole;
the outlet regulating valve, the flowmeter water outlet pipe and the regulating valve water outlet pipe are reducer pipes;
metal winding graphite gaskets are arranged among the pump water outlet pipe, the buffer pipe, the flowmeter water outlet pipe, the outlet adjusting valve and the adjusting valve water outlet pipe, the engine is connected with an engine control box through a signal line, and an oil pipe of the engine is connected with an oil tank.
The diesel pump comprises a shaft seal box body, a pump shaft is arranged in the shaft seal box body, one end of the pump shaft penetrates through a water outlet end bearing frame and a non-drive end bearing cover, one end of the pump shaft, which penetrates through the water outlet end bearing frame and the non-drive end bearing cover, is embedded into the fan, and the other end of the pump shaft penetrates through a drive end bearing and a drive end bearing cover;
a non-driving end bearing is arranged in the water outlet end bearing frame;
a pump connection flat key is arranged at one end, close to the bearing cover of the driving end, of the pump shaft, and a plurality of impeller flat keys are arranged on the pump shaft;
furthermore, a fan cover is arranged on one side, away from the non-driving-end bearing cover, of the fan; the fan cover is fixed on the shaft seal box body;
an oil cup is arranged at one end, far away from the non-driving end bearing cover, of the water outlet end bearing frame; the oil cup penetrates through the shaft seal box body to be in contact with the bearing frame at the water outlet end; a dustproof disc is arranged at one end of the oil cup, which is far away from the bearing at the water outlet end, and the dustproof disc is sleeved on the pump shaft; the shaft seal box body is provided with a water outlet section and a water inlet section;
furthermore, a tensioning bolt is arranged at one end of the shaft seal box body, which is far away from the water outlet section and the water inlet section; a first-stage sealing ring is arranged at one end, close to the tensioning bolt, of the water inlet section, a first-stage impeller is arranged on one side of the first-stage sealing ring, and the first-stage impeller and the impeller flat keys are arranged oppositely; the impellers are arranged corresponding to the impeller flat keys; the two ends of the impeller are provided with interstage plates, and guide vanes are arranged between the interstage plates; a first sealing ring is arranged between the interstage plate and the shaft seal box body;
the water inlet section is provided with a second sealing ring, and one end of the second sealing ring, which is far away from the water inlet section, is provided with a mechanical seal;
furthermore, a tension bolt is arranged at the bottom end of the first-stage impeller and penetrates through the shaft seal box body, a last-stage guide vane is arranged at the bottom end of the water inlet section, and a balance drum sleeve is arranged on one side of the last-stage guide vane.
Compared with the prior art, the beneficial effects of the utility model are that:
the pump set system of the two-loop emergency water-replenishing diesel engine pump mainly comprises a horizontal multistage centrifugal pump head, a diesel engine, an inlet water tank, a coupler, an outlet regulating valve, an outlet flowmeter, an inlet-outlet pressure gauge, an inlet-outlet metal hose, an inlet-outlet pipeline and the like, wherein the diesel engine and the pump are both arranged on an integral base, the pump head and the diesel engine are connected by adopting a diaphragm coupler, the whole set of pump set system is arranged in a carriage, and when an emergency occurs, the pump set can be started without providing energy to the outside, so that the reliability of the emergency system is improved;
the two-loop emergency water replenishing pump set is a horizontal sectional type multistage centrifugal pump, the supporting mode of the pump is a ground support, wherein a double-row roller bearing (mainly bearing axial force and radial force) is adopted for supporting the tail end, a single-row roller bearing (mainly bearing radial force) is adopted for supporting the driving end, and rolling bearings are respectively arranged in supporting frames at two ends of the pump. The connecting structure between the supporting frame and the pump body is also provided with a mechanical seal assembly, a balance drum assembly and the like, and the hydraulic axial force of the pump is balanced through the arrangement of the balance drum assembly;
the both ends about the pump body are established to the section of intaking and the play water section of pump, and the pump import sets up to the side direction, pump export and sets up the portion, and the final import and the export of pump connect the piping flange all should be located the left surface (from the rear of a vehicle to the locomotive direction) that removes the carriage.
The middle part between the water inlet section and the water outlet section is provided with a sectional guide vane at each stage, and an impeller and a sealing element are arranged in the guide vane; the impellers, the mechanical seal assembly and the balance drum assembly are supported to two ends and integrally assembled with a main shaft of the pump to form a rotor part of the pump.
The balancing device for the axial force of the pump set comprises a balancing drum rotating along with the shaft and a balancing sleeve fixed on the water outlet section. The axial forces are balanced by a pressure "a" (equal to about pump outlet pressure) generated at the back shroud of the last stage impeller and a pressure "b" (equal to inlet pressure + balance line loss) generated by the balance chamber, which due to the pressure differential, cause a pressure "F" acting on the balance drum. The pressure F is generated by the end surface A of the balance drum, the balance drum of each pump can ensure that the pump can balance most of axial force at a working point, the thrust bearing can balance residual axial force, and due to the pressure difference between the cavity a and the cavity b, a medium flows into the cavity b balancing device through the balance drum and the balance sleeve gap c to operate without failure. The liquid in the cavity "b" flows into the inlet of the pump through the balance pipe, so that the pressure difference between the cavity "a" and the cavity "b" is ensured, the axial force of the pump can be continuously balanced, and the pump can continuously work when a disaster event occurs until the disaster crisis is relieved. Meanwhile, the pump set system is provided with a sensor for detecting the temperature of a pump bearing and the flow rate of an outlet of the pump and a pointer type pressure gauge arranged on an inlet pipeline and an outlet pipeline, and the sensors and the pointer type pressure gauge are connected to a local control system of the pump through wires, so that the operation condition of the pump can be monitored in real time.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a top view of a two-circuit emergency water replenishing diesel engine pump set system;
FIG. 2 is a schematic structural diagram of a two-circuit emergency water-replenishing diesel engine pump;
FIG. 3 is a front view of a two-circuit emergency water supplement diesel engine pump unit system;
figure 4 is a schematic view of the balancing device of the axial forces of the pump group.
In the figure: 1. a fan housing; 2. a fan; 3. a non-drive end bearing cap; 4. a bearing frame at the water outlet end; 5. an oil cup; 6. a dust-proof disc; 7. a shaft seal box body; 8. a water outlet section; 9. an inter-stage plate; 10. an impeller; 11. a guide vane; 12. an impeller flat key; 13. a first seal ring; 14. a water inlet section; 15. a second seal ring; 16. machine sealing; 17. a drive end bearing; 18. a drive end bearing cap; 19. a pump leveling key; 20. a round nut; 21. a pump shaft; 22. a water inlet section bearing frame; 23. a primary seal ring; 24. a first stage impeller; 25. tightening the bolts; 26. a last stage guide vane; 27. a balance drum sleeve; 28. a non-drive end bearing; 29. a diesel pump; 30. a pump head; 31. a diaphragm coupling; 32. an engine; 33. a water inlet; 34. a pump water inlet pipe; 35. a pressure vacuum gauge; 36. a water tank of a secondary loop emergency water replenishing pump; 37. an exhaust valve; 38. a drain valve; 39. a water inlet pipe of the water tank; 40. a pump-out water pipe; 41. a pressure gauge; 42. a buffer tube; 43. an electromagnetic flow meter; 44. a water outlet pipe of the flowmeter; 45. an outlet regulating valve; 46. a water outlet pipe of the regulating valve; 47. and (4) hydrophobic pores.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, a two-circuit emergency water-replenishing diesel engine pump set and system for a nuclear power plant comprises a diesel pump 29, wherein a pump head 30 is arranged at one end of the diesel pump 29, the pump head 30 is connected with a diaphragm coupling 31, and the other end of the diaphragm coupling 31 is connected with an engine 32; a water inlet 33 is arranged at one end of the diesel pump 29 close to the pump head 30, the water inlet 33 is connected with a pump water inlet pipe 34, a pressure vacuum meter 35 is arranged between the water inlet 33 and the pump water inlet pipe 34, and the pressure vacuum meter 35 is arranged at one side close to the water inlet 33;
the other end of the pump water inlet pipe 34 is connected to a two-loop emergency water replenishing pump water tank 36, and the two-loop emergency water replenishing pump water tank 36 is provided with an exhaust valve 37 and a drain valve 38;
a water tank inlet pipe 39 is arranged on one side, away from the pump inlet pipe 34, of the two-loop emergency water replenishing pump water tank 36, and a metal winding graphite gasket is arranged between the water tank inlet pipe 39 and the two-loop emergency water replenishing pump water tank 36;
the two-circuit emergency water replenishing pump water tank 36 is a vacuum self-suction water tank, and can convey water into the water outlet pipeline in a short time after the pump set is started, and simultaneously, when the two-circuit emergency water replenishing pump water tank 36 is in disaster, namely when the suction pressure is negative (the water supply pipeline cannot provide positive pressure), the pump set is started, and water can be conveyed into the water outlet pipeline in a short time
The diesel pump 29 is provided with a pump-out water pipe 40 at one side far away from the pump water inlet pipe 34, the other side of the pump-out water pipe 40 is connected with a buffer pipe 42 provided with a pressure gauge 41, the other side of the buffer pipe 42 is connected with a flow meter water outlet pipe 44 provided with an electromagnetic flow meter 43, the other side of the flow meter water outlet pipe 44 is connected with an outlet regulating valve 45, and the other side of the outlet regulating valve 45 is connected with a regulating valve water outlet pipe 46.
The diesel pump 29 and the engine 32 are both fixed on a bottom plate, and a drain hole 47 is formed in the position, close to the diesel pump 29, of the bottom plate;
the outlet regulating valve 45, the flowmeter water outlet pipe 44 and the regulating valve water outlet pipe 46 are reducer pipes;
metal winding graphite gaskets are arranged among the pump-out water pipe 40, the buffer pipe 42, the flowmeter water outlet pipe 44, the outlet regulating valve 45 and the regulating valve water outlet pipe 46, the engine 32 is connected with an engine control box through signal lines, and an oil pipe of the engine 32 is connected with an oil tank.
The diesel pump 29 comprises a shaft seal box body 7, a pump shaft 21 is arranged in the shaft seal box body 7, one end of the pump shaft 21 penetrates through the water outlet end bearing frame 4 and the non-drive end bearing cover 3 and is embedded into the fan 2, and the other end of the pump shaft 21 penetrates through the drive end bearing 17 and the drive end bearing cover 18;
a non-driving end bearing 28 is arranged in the water outlet end bearing frame 4;
a pump connection flat key 19 is arranged at one end of the pump shaft 21 close to the bearing cover 18 at the driving end, and a plurality of impeller flat keys 12 are arranged on the pump shaft 21; the lower end of the drive end bearing cover 18 is provided with a round nut 20;
a fan cover 1 is arranged on one side of the fan 2, which is far away from the bearing cover 3 of the non-driving end; the fan cover 1 is fixed on the shaft seal box body 7;
an oil cup 5 is arranged at one end of the water outlet end bearing frame 4 far away from the non-driving end bearing cover 3;
the oil cup 5 penetrates through the shaft seal box body 7 to be in contact with the bearing frame 4 at the water outlet end;
a dustproof disc 6 is arranged at one end of the oil cup 5 far away from the water outlet end bearing, and the dustproof disc 6 is sleeved on the pump shaft 21; the shaft seal box body 7 is provided with a water outlet section 8 and a water inlet section 14;
a tensioning bolt 25 is arranged at one end of the shaft seal box body 7, which is far away from the water outlet section 8 and the water inlet section 14; a first-stage sealing ring 23 is arranged at one end, close to the tension bolt 25, of the water inlet section 14, a first-stage impeller 24 is arranged on one side of the first-stage sealing ring 23, and the first-stage impeller 24 is arranged opposite to the impeller flat keys 12; the end of the first-stage impeller 24 away from the water inlet section 14 is provided with a water inlet section bearing frame 22.
The impellers 10 are arranged corresponding to the impeller flat keys 12; the two ends of the impeller 10 are provided with the interstage plates 9, and guide vanes 11 are arranged between the interstage plates 9 and the interstage plates 9; a first sealing ring 13 is arranged between the interstage plate 9 and the shaft seal box body 7;
the water inlet section 14 is provided with a second sealing ring 15, and one end of the second sealing ring 15, which is far away from the water inlet section 14, is provided with a mechanical seal 16;
the bottom of the first-stage impeller 24 is provided with a drawing bolt, the drawing bolt 25 penetrates through the shaft seal box body 7, the bottom of the water inlet section 14 is provided with a last-stage guide vane 26, and one side of the last-stage guide vane 26 is provided with a balance drum sleeve 27.
The utility model discloses when specifically implementing: the two-loop emergency water-replenishing diesel engine pump set system mainly comprises a horizontal multistage centrifugal pump head 30, an engine 32, a two-loop emergency water-replenishing pump water tank 36, a diaphragm coupling 31, an outlet adjusting valve 45, an electromagnetic flowmeter 43, an inlet-outlet pressure gauge, an inlet-outlet metal hose and an inlet-outlet pipeline, wherein the engine 32 and a diesel pump 29 are both installed on an integral base, the pump head 30 and the engine 32 are connected by the diaphragm coupling 31, and the whole set of pump set system is installed inside a carriage.
The pump unit system is installed inside the carriage.
The two-loop emergency water replenishing pump set is a horizontal sectional type multistage centrifugal pump, the supporting mode of the pump is ground support, wherein the tail end support mainly bears axial force and radial force by adopting a double-row roller bearing, and the driving end mainly bears radial force by adopting a single-row roller bearing; the rolling bearings are respectively arranged in the supporting frames at the two ends of the pump; the connecting structure between the supporting frame and the pump body is also provided with a mechanical seal 16 assembly, a balance drum assembly and the like, wherein the balance drum assembly is used for balancing the hydraulic axial force of the pump; the water inlet section 14 and the water outlet section 8 of the pump are arranged at the left end and the right end of the pump body, and the inlet of the pump is arranged to be in a side direction and the outlet of the pump is arranged to be in a setting part.
The pipeline layout of the equipment should ensure that: the final inlet and outlet pipe flanges of the pump are located on the left side of the movable carriage (seen from the tail of the vehicle to the head of the vehicle, the middle part between the water inlet section 14 and the water outlet section 8 is a sectional guide vane 11 with each stage, an impeller 10 and a sealing element are arranged in the middle part, the impeller 10, a mechanical seal 16 assembly and a balance drum assembly of each stage are supported to two ends, and the impeller 10, the mechanical seal 16 assembly and the balance drum assembly are integrally assembled with a main shaft of the pump to form a rotor component of the pump.
The balancing device for the axial force of the pump set comprises a balancing drum rotating along with the shaft and a balancing sleeve fixed on the water outlet section 8.
The axial forces are balanced by a pressure "a" developed at the back shroud of the last stage impeller 10 that is approximately equal to the pump outlet pressure and a pressure "b" developed at the balance chamber that is equal to the inlet pressure + balance line losses, which result in a pressure "F" acting on the balance drum due to the pressure differential.
The pressure F is generated by the end surface A of the balance drum, the balance drum of each pump can ensure that the pump can balance most of axial force at a working point, the thrust bearing can balance residual axial force, and due to the pressure difference between the cavity a and the cavity b, a medium flows into the cavity b balancing device through the balance drum and the balance sleeve gap c to operate without failure.
The liquid in the cavity "b" flows into the inlet of the pump through the balance pipe, so that the pressure difference between the cavity "a" and the cavity "b" is ensured, and the axial force can be continuously balanced by the pump.
The shaft seal of the pump adopts single end face balance type integrated mechanical seal.
Two groups of mechanical seals are respectively arranged in the sealing cavities which are symmetrical to the two sides of the shell.
The pump set system is provided with sensors for detecting the bearing temperature of the pump shaft 21 and the flow rate of the pump outlet, the sensors are connected to a local control system of the pump, and meanwhile, the inlet and outlet pipelines are provided with pointer type pressure gauges which can monitor the operation condition of the pump in real time.
Rotation direction of the pump: the direction of rotation is clockwise as viewed from the drive end of the pump.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A nuclear power plant uses emergent moisturizing diesel engine pump package and system of two return circuits, includes diesel pump (29), characterized by that, the said diesel pump (29) is installed in carriage, one end of the said diesel pump (29) is equipped with the pump head (30), the said pump head (30) is connected with diaphragm coupling (31), another end and engine (32) of the said diaphragm coupling (31) link to each other; a water inlet (33) is formed in one end, close to the pump head (30), of the diesel pump (29), the water inlet (33) is connected with a pump water inlet pipe (34), a pressure vacuum meter (35) is arranged between the water inlet (33) and the pump water inlet pipe (34), and the pressure vacuum meter (35) is installed on one side, close to the water inlet (33);
the other end of the pump water inlet pipe (34) is connected to a two-loop emergency water replenishing pump water tank (36), and the two-loop emergency water replenishing pump water tank (36) is provided with an exhaust valve (37) and a liquid discharge valve (38);
a water tank inlet pipe (39) is arranged on one side, away from the pump inlet pipe (34), of the two-loop emergency water replenishing pump water tank (36), and a metal winding graphite gasket is arranged between the water tank inlet pipe (39) and the two-loop emergency water replenishing pump water tank (36);
one side of the diesel pump (29) far away from the pump water inlet pipe (34) is provided with a pump water outlet pipe (40), the other side of the pump water outlet pipe (40) is connected with a buffer pipe (42) provided with a pressure gauge (41), the other side of the buffer pipe (42) is connected with a flowmeter water outlet pipe (44) provided with an electromagnetic flowmeter (43), the other side of the flowmeter water outlet pipe (44) is connected with an outlet adjusting valve (45), and the other side of the outlet adjusting valve (45) is connected with an adjusting valve water outlet pipe (46).
2. The two-loop emergency water replenishing diesel engine pump set and system for the nuclear power plant as claimed in claim 1, wherein a bottom plate is arranged at the bottom end of the diesel pump (29), the bottom plate is installed at the bottom of a carriage, the diesel pump (29) and the engine (32) are both fixed on the bottom plate, and the bottom plate is provided with a water drainage hole (47);
the outlet regulating valve (45), the flowmeter water outlet pipe (44) and the regulating valve water outlet pipe (46) are reducer pipes;
metal winding graphite gaskets are arranged among the pump water outlet pipe (40), the buffer pipe (42), the flowmeter water outlet pipe (44), the outlet adjusting valve (45) and the adjusting valve water outlet pipe (46), the engine (32) is connected with an engine control box through a signal line, and an oil pipe of the engine (32) is connected with an oil tank.
3. The two-circuit emergency water replenishing diesel engine pump set and system for the nuclear power plant according to claim 2 are characterized in that the diesel pump (29) comprises a shaft seal box body (7), a pump shaft (21) is arranged in the shaft seal box body (7), one end of the pump shaft (21) penetrates through a water outlet end bearing frame (4) and a non-driving end bearing cover (3), the pump shaft (21) penetrates through the water outlet end bearing frame (4) and one end of the non-driving end bearing cover (3) and is embedded into the fan (2), and the other end of the pump shaft (21) penetrates through a driving end bearing (17) and a driving end bearing cover (18);
a non-driving end bearing (28) is arranged in the water outlet end bearing frame (4);
one end, close to the drive end bearing cover (18), of the pump shaft (21) is provided with a pump connection flat key (19), and the pump shaft (21) is provided with a plurality of impeller flat keys (12).
4. The two-circuit emergency water replenishing diesel engine pump set and the system for the nuclear power plant according to claim 3 are characterized in that a fan cover (1) is arranged on one side, away from the non-driving-end bearing cover (3), of the fan (2); the fan cover (1) is fixed on the shaft seal box body (7);
an oil cup (5) is arranged at one end, far away from the non-driving end bearing cover (3), of the water outlet end bearing frame (4); the oil cup (5) penetrates through the shaft seal box body (7) to be in contact with the bearing through the water outlet end bearing frame (4); a dustproof disc (6) is arranged at one end, away from the water outlet end bearing, of the oil cup (5), and the dustproof disc (6) is sleeved on the pump shaft (21); the shaft seal box body (7) is provided with a water outlet section (8) and a water inlet section (14).
5. The two-circuit emergency water replenishing diesel engine pump set and the system for the nuclear power plant according to claim 4, wherein one end of the shaft seal box body (7), which is far away from the water outlet section (8) and the water inlet section (14), is provided with a tension bolt (25); a primary sealing ring (23) is arranged at one end, close to the tension bolt (25), of the water inlet section (14), a primary impeller (24) is arranged on one side of the primary sealing ring (23), and the primary impeller (24) is arranged opposite to the impeller flat keys (12); the impellers (10) are arranged corresponding to the impeller flat keys (12); the two ends of the impeller (10) are provided with interstage plates (9), and guide vanes (11) are arranged between the interstage plates (9) and the interstage plates (9); a first sealing ring (13) is arranged between the interstage plate (9) and the shaft seal box body (7);
the section of intaking (14) is equipped with second sealing washer (15), the one end that the section of intaking (14) was kept away from in second sealing washer (15) is equipped with machine and seals (16).
6. The two-circuit emergency water replenishing diesel engine pump set and system for the nuclear power plant according to claim 5, wherein a tension bolt (25) is arranged at the bottom end of the first-stage impeller (24), the tension bolt (25) penetrates through the shaft seal box body (7), a last-stage guide vane (26) is arranged at the bottom end of the water inlet section (14), and a balance drum sleeve (27) is arranged on one side of the last-stage guide vane (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021913458.3U CN212508860U (en) | 2020-09-04 | 2020-09-04 | Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021913458.3U CN212508860U (en) | 2020-09-04 | 2020-09-04 | Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508860U true CN212508860U (en) | 2021-02-09 |
Family
ID=74385523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021913458.3U Active CN212508860U (en) | 2020-09-04 | 2020-09-04 | Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508860U (en) |
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2020
- 2020-09-04 CN CN202021913458.3U patent/CN212508860U/en active Active
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