CN119802000A - A cooling water pump for nuclear power plant equipment - Google Patents
A cooling water pump for nuclear power plant equipment Download PDFInfo
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- CN119802000A CN119802000A CN202510280246.7A CN202510280246A CN119802000A CN 119802000 A CN119802000 A CN 119802000A CN 202510280246 A CN202510280246 A CN 202510280246A CN 119802000 A CN119802000 A CN 119802000A
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Abstract
The invention relates to the technical field of cooling water pumps and discloses a cooling water pump for nuclear power station equipment, which comprises a motor, wherein the output end of the motor is connected with a pump shaft through a coupling, the other end of the pump shaft is connected with a pump body, a sealing mechanism is commonly connected between the pump body and the pump shaft, the sealing mechanism comprises a sealing shell, the sealing shell consists of a shell and an end cover, a stationary ring is fixedly connected in the end cover, a movable ring is arranged on one side of the stationary ring, a telescopic piece is arranged on one side of the movable ring, a plurality of elastic pieces are arranged on the telescopic piece, the elastic pieces drive the telescopic piece to extend to enable the movable ring to abut against the stationary ring, and a positioning piece is arranged on one side, facing an arc-shaped elastic piece, of the fixing ring and used for limiting restoration deformation of the arc-shaped elastic piece. The quantity and the range of the force application points of the movable ring can be increased through the staggered arrangement of the elastic pieces, the movable ring is ensured to be uniformly applied with thrust, and meanwhile, the limiting block for the rotation of the pump shaft limits the restoration deformation of the arc-shaped elastic piece, so that the movable ring is prevented from moving when being impacted.
Description
Technical Field
The invention relates to the technical field of cooling water pumps, in particular to a cooling water pump for nuclear power station equipment.
Background
The nuclear power station generates heat energy through a nuclear reactor, the heat energy is converted to generate electric energy , and cooling water is pumped by a cooling water pump to cool various devices (such as a motor, a transformer, control equipment and the like) in the nuclear power station to ensure stable operation of the devices.
Because the internal environment of the nuclear power station is in a high-temperature and high-pressure state, the pump shaft of the cooling water pump is connected with the pump body by adopting a mechanical seal, and the mechanical seal has the advantages of good sealing performance and low leakage, can be suitable for high-pressure, high-speed and high-temperature working conditions, and meets the applicable requirements of the nuclear power station. Mechanical seal mainly passes through axial pressure through elastic element to the rotating ring, make rotating ring and quiet ring remain in close contact throughout, current elastic element mainly adopts the spring as elasticity to support, and cooling water pump is because of vibrations, drunkenness and water pressure change scheduling problem easily produce the impact to the rotating ring in the operation process, coil spring's characteristic easily causes local stress concentration, be difficult to apply even pressure to the rotating ring, the quiet ring is kept away from to the less one side of rotating ring atress for terminal surface gap between rotating ring and the quiet ring is inhomogeneous, easily increases the wearing and tearing speed of rotating ring and the leakage probability of cooling water, lead to the safe operation of nuclear power station equipment to have great hidden danger.
Disclosure of Invention
In view of the problems in the prior art, the elastic element is difficult to uniformly apply pressure to the movable ring in the mechanical seal, so that a gap is generated between the movable ring and the static ring, and the cooling water pump for the nuclear power station equipment is provided.
The elastic pieces are arranged in a staggered mode, supporting points of the elastic pieces and the movable ring are increased, and meanwhile, the elastic pieces are limited through the limiting pieces when the cooling water pump runs, so that the movable ring is prevented from moving after being impacted.
The technical scheme of the invention is that the cooling water pump for the nuclear power station equipment comprises a motor, wherein the output end of the motor is connected with a pump shaft through a coupler, the other end of the pump shaft is connected with a pump body, a sealing mechanism is commonly connected between the pump body and the pump shaft, the sealing mechanism comprises a sealing shell, the sealing shell consists of a shell and an end cover, a stationary ring is fixedly connected in the end cover, a movable ring is arranged on one side of the stationary ring, which faces the shell, of the pump shaft movably penetrates through the shell, the stationary ring and the end cover, the movable ring is sleeved on the pump shaft, a telescopic piece is arranged on one side of the movable ring, which is far away from the stationary ring, the telescopic piece is sleeved on the pump shaft, and a plurality of elastic pieces are arranged on the telescopic piece and drive the telescopic piece to extend so that the movable ring is abutted to the stationary ring;
the elastic piece comprises a fixed ring sleeved on the telescopic piece, and a plurality of arc-shaped elastic pieces are uniformly distributed on one side of the fixed ring;
The fixed ring is provided with a locating piece towards one side of the arc-shaped elastic sheet, the locating piece comprises a connecting ring rotationally connected with the fixed ring, a plurality of locating blocks are uniformly distributed on the outer ring of the connecting ring, and the locating blocks are used for limiting the restoration deformation of the arc-shaped elastic sheet.
By adopting the technical scheme, the elastic pieces are axially and equidistantly sleeved on the telescopic pieces, the two adjacent elastic pieces are in sliding contact with each other, the arc-shaped elastic pieces are in a compressed state, the elastic pieces are matched with the telescopic pieces to uniformly apply thrust towards one side of the movable ring, so that the telescopic pieces stretch and are in butt joint with the movable ring, the movable ring is in contact with the stationary ring, when the motor drives the pump shaft to rotate, the movable ring, the telescopic pieces and the elastic pieces synchronously rotate along with the pump shaft, the connecting ring is driven by inertia to contact the positioning block and the arc-shaped elastic pieces, the arc-shaped elastic pieces are prevented from moving towards the direction of the compressed state, and therefore the movable ring can be prevented from being far away from the stationary ring when being impacted, and the movable ring and the stationary ring can always keep in effective contact.
Further, the shell is fixedly connected with the end cover, the shell is in sealing rotation connection with the pump shaft, and the end cover is fixedly connected with the pump body.
By adopting the technical scheme, the shell and the end cover are fixedly connected through the bolts, the sealing rings are arranged between the shell and the end cover, round holes larger than the pump shaft are formed in the left end of the shell and the right end of the end cover, the O-shaped rings are embedded in the round holes in the left end of the shell, and the O-shaped rings are sleeved on the pump shaft.
Further, the telescopic piece comprises a fixing seat and a push ring which are sleeved on the pump shaft, a sleeve is fixedly connected to one side of the fixing seat, which faces the push ring, a plurality of notches are formed in the sleeve at equal intervals in an annular shape, a plurality of arc-shaped plates are fixedly connected to one side of the push ring, and the arc-shaped plates are in sliding connection with the notches;
the fixed seat is fixedly connected with the pump shaft, and the push ring is arranged between the fixed seat and the movable ring.
By adopting the technical scheme, the fixing seat is provided with the plurality of screw holes, the mounting bolts in the screw holes are abutted with the outer wall of the pump shaft, so that the fixing seat is fixedly connected with the pump shaft, and the elastic piece can drive the push ring to be abutted with the movable ring by utilizing the telescopic sliding fit of the arc plate and the sleeve.
Further, the arc-shaped elastic sheet is in a semicircular structure in an original length state, and is in a minor arc structure in a deformed state.
By adopting the technical scheme, the arc-shaped elastic pieces are made of metal materials with bending deformation and automatic recovery, and the number of the application points of the movable ring and the area of a single application point can be increased through the arrangement of the plurality of arc-shaped elastic pieces, so that the movable ring can be pushed uniformly in time.
Further, one end of the arc-shaped elastic piece is rotationally connected with the fixed ring, the other end of the arc-shaped elastic piece is fixedly connected with a connecting shaft, a plurality of arc-shaped holes are formed in the fixed ring, and the connecting shaft is in sliding connection with the arc-shaped holes;
one side of the fixed ring, which is far away from the arc-shaped elastic sheet, is provided with a synchronous ring, and one end of the connecting shaft penetrates through the arc-shaped hole and is fixedly connected with the synchronous ring.
By adopting the technical scheme, the arc-shaped elastic pieces are matched with the arc-shaped holes through the connecting shafts to elastically deform, and the synchronous rings are utilized to be connected with all the arc-shaped elastic pieces, so that all the arc-shaped elastic pieces can be synchronously deformed, and the elastic pieces are ensured to uniformly apply pressure to the movable rings all the time in the axial direction.
Further, a plurality of positioning sliding plates are fixedly arranged on the inner ring of the fixed ring at equal intervals, sliding grooves are formed in the outer side walls of the sleeve and the arc-shaped plate, and the positioning sliding plates are in sliding contact with the sliding grooves.
By adopting the technical scheme, the fixed ring is stably arranged on the telescopic piece by utilizing the cooperation of the positioning sliding plate and the sliding groove, so that the axial force application of all elastic pieces is limited in the same circular range, and the push ring is ensured to uniformly apply pressure to the movable ring.
Further, the cross section of the connecting ring is of a T-shaped structure, a plurality of arc grooves are formed in the inner ring of the connecting ring, the arc grooves are in sliding connection with the positioning sliding plate, and a plurality of positioning blocks are fixedly connected to the outer ring of the connecting ring.
By adopting the technical scheme, the arc-shaped groove is connected with the positioning sliding plate, so that the connecting ring has a certain rotation range, the fixed ring rotates relatively between the connecting ring and the fixed ring under the influence of inertia when the fixed ring rotates along with the pump shaft, the positioning block is in butt joint with the connecting shaft under the influence of inertia, and the resistance of the arc-shaped elastic sheet is increased when the elastic sheet is subjected to recovery deformation, so that when the movable ring is impacted to be far away from the static ring, the resistance of the arc-shaped elastic sheet recovery is larger, the movable ring can be prevented from obviously displacing, the movable ring and the static ring can be ensured to keep effective contact, and medium leakage is avoided.
Further, the connecting ring is provided with a plurality of dynamic pressure grooves at equal intervals in an annular shape on one side far away from the fixed ring, the width of one side of the dynamic pressure groove close to the outer ring of the connecting ring is larger than that of one side close to the inner ring of the connecting ring, and the depth of the inlet end of the dynamic pressure groove is larger than that of the outlet end of the dynamic pressure groove.
By adopting the technical scheme, after the positioning block is abutted with the connecting shaft, the connecting ring synchronously rotates along with the fixed ring, and at the moment, the inlet end of the dynamic pressure groove cuts air or cuts liquid, so that the inertia influence of the connecting ring is increased, the resistance of the positioning block to the connecting shaft is increased, and meanwhile, when the air or liquid passes through the inclined plane of the dynamic pressure groove, the rotating friction force between the connecting ring and the fixed ring is increased, and the limiting stability of the positioning block to the connecting shaft is improved.
Further, a cooling cavity is formed in the shell, a pipe connecting opening communicated with the cooling cavity is fixedly formed in the shell, a water guide pipe is fixedly connected to the pipe connecting opening, and the other ends of the two water guide pipes are respectively communicated with the water inlet and the water outlet of the pump body.
By adopting the technical scheme, when the water pump is used for conveying cooling water, the water inlet of the pump body is used for conveying part of cooling water into the cooling cavity through the water guide pipe, and the cooling water of the part is used for absorbing heat in the sealing shell and then flows to the water outlet of the pump body through the other water guide pipe, so that the inside of the sealing shell can be cooled, and the effect of reducing the elasticity of the arc-shaped elastic sheet in a long-term high-temperature environment is avoided.
Compared with the prior art, the invention has the following beneficial effects:
1. The quantity and the range of the force application points of the movable ring can be increased through the staggered arrangement of the elastic pieces, the movable ring is ensured to be uniformly applied with thrust, the movable ring and the stationary ring are kept in uniform contact, meanwhile, when the elastic pieces rotate along with the pump shaft, the connecting ring is driven by inertia to move by driving the limiting block, the elastic pieces are enabled to limit the restoration deformation of the arc-shaped elastic pieces, the elastic pieces are enabled to be difficult to compress and deform when rotating, the movable ring is prevented from moving when being impacted, and gaps are generated between the movable ring and the stationary ring to cause medium leakage.
2. When the connecting ring rotates along with the fixed ring, the dynamic pressure groove cuts air or liquid to increase the limiting effect of the limiting block on the arc-shaped elastic piece, and meanwhile, when the air or liquid passes through the inclined plane of the dynamic pressure groove, the connecting ring is in closer contact with the fixed ring, so that the limiting stability of the limiting block on the arc-shaped elastic piece is ensured.
3. Through aqueduct and pump body, cooling chamber intercommunication, the pump body is when carrying the cooling water, and partial cooling water is through the cooling chamber for can cool down the cooling to the seal shell inside, avoid the arc shell fragment to reduce the elasticity effect under long-term high temperature environment.
Drawings
FIG. 1 is a schematic perspective view of the whole structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a containment vessel structure of the present invention;
FIG. 3 is a schematic view showing the structure of the telescopic member according to the present invention;
FIG. 4 is a schematic cross-sectional view of the stationary ring, the moving ring, and the telescoping member of the present invention;
FIG. 5 is a schematic diagram of the elastic member according to the present invention;
FIG. 6 is a schematic view showing the disassembly of the structure of the fixing ring, the arc-shaped spring plate and the synchronizing ring according to the present invention;
FIG. 7 is a schematic view of the structure of the connecting shaft and the positioning block of the present invention;
FIG. 8 is a schematic view showing the disassembly of the structure of the fixing ring and the connecting ring of the present invention;
Fig. 9 is an enlarged schematic view of the structure of fig. 7 a according to the present invention.
In the figure:
1. A motor; 2, a pump shaft, 3, a pump body, 4, a sealing shell, 41, a shell, 42, an end cover, 43, a cooling cavity, 44, a connecting port, 5, a static ring, 6, a moving ring, 7, a telescopic piece, 71, a fixed seat, 72, a push ring, 73, a sleeve, 74, an arc plate, 75, a sliding groove, 8, an elastic piece, 81, a fixed ring, 82, a positioning sliding plate, 83, an arc spring plate, 84, a connecting shaft, 85, an arc hole, 86, a synchronous ring, 9, a positioning piece, 91, a connecting ring, 92, an arc groove, 93, a positioning block, 94, a dynamic pressure groove and 10, and a water guide pipe.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Referring to fig. 1-6, in a first embodiment of the present invention, a cooling water pump for a nuclear power plant device is provided, which includes a motor 1, an output end of the motor 1 is connected with a pump shaft 2 through a coupling, the other end of the pump shaft 2 is connected with a pump body 3, a sealing mechanism is jointly connected between the pump body 3 and the pump shaft 2, the sealing mechanism includes a sealing shell 4, the sealing shell 4 is composed of a shell 41 and an end cover 42, a stationary ring 5 is fixedly connected in the end cover 42, a movable ring 6 is disposed on one side of the stationary ring 5 facing the shell 41, the pump shaft 2 movably penetrates through the shell 41, the stationary ring 5 and the end cover 42, the movable ring 6 is sleeved on the pump shaft 2, a telescopic piece 7 is disposed on one side of the movable ring 6 far from the stationary ring 5, the telescopic piece 7 is sleeved on the pump shaft 2, a plurality of elastic pieces 8 are disposed on the telescopic piece 7, the telescopic piece 8 drives the telescopic piece 7 to stretch so that the movable ring 6 is abutted to the stationary ring 5, the elastic piece 8 includes a fixed ring 81 sleeved on the telescopic piece 7, one side of the fixed ring 81 is provided with a plurality of arc-shaped elastic pieces 83, one side of the fixed ring 81 is fixedly connected with the arc-shaped elastic pieces 83, one side of the fixed ring 81 facing the arc-shaped elastic pieces 83, the fixed ring 9 includes a positioning piece 91 is rotatably connected with the fixed ring 91, and the elastic pieces are uniformly distributed on the positioning piece 93, and are deformed and are used for restoration of the arc-shaped positioning piece 93.
Specifically, a plurality of elastic pieces 8 are axially equidistant and are arranged on the telescopic piece 7 in a sleeved mode, two adjacent elastic pieces 8 are in sliding contact with each other, the arc-shaped elastic piece 83 is in a compressed state, at the moment, the elastic pieces 8 are matched with the telescopic piece 7 to evenly apply thrust towards one side of the movable ring 6, the telescopic piece 7 stretches and is abutted to the movable ring 6, the movable ring 6 is in contact with the stationary ring 5, when the motor 1 drives the pump shaft 2 to rotate, the movable ring 6, the telescopic piece 7 and the elastic pieces 8 synchronously rotate along with the pump shaft 2, the connecting ring 91 is subjected to inertia to drive the positioning block 93 to be in contact with the arc-shaped elastic piece 83, the arc-shaped elastic piece 83 is prevented from moving towards the compressed state, and therefore the movable ring 6 can be prevented from being far away from the stationary ring 5 when being impacted, and the movable ring 6 and the stationary ring 5 can always keep in effective contact.
Referring to fig. 4, an annular groove is formed in the inner side wall of the movable ring 6, an O-ring is arranged in the annular groove and sleeved on the pump shaft 2, the tightness of the movable ring 6 and the pump shaft 2 is improved, medium leakage is prevented, meanwhile, the O-ring has good elasticity and flexibility, can adapt to the fine displacement change of the movable ring 6 in a certain range, compensates the vibration of the water pump and the axial displacement of the pump shaft 2 through the deformation of the O-ring, keeps good contact with the movable ring 6 and the pump shaft 2, and maintains the sealing effect.
Referring to fig. 2, the housing 41 is fixedly connected with the end cover 42, the housing 41 is rotatably connected with the pump shaft 2 in a sealing manner, and the end cover 42 is fixedly connected with the pump body 3.
Specifically, the casing 41 and the end cover 42 are fixed through bolt connection, a sealing ring is arranged between the casing 41 and the end cover 42, round holes larger than the pump shaft 2 are formed in the left end of the casing 41 and the right end of the end cover 42, an O-shaped ring is embedded in the round hole in the left end of the casing 41, and the O-shaped ring is sleeved on the pump shaft 2.
Referring to fig. 3-4, the telescopic member 7 comprises a fixed seat 71 sleeved on the pump shaft 2 and a push ring 72, wherein a sleeve 73 is fixedly connected to one side of the fixed seat 71 facing the push ring 72, a plurality of notches are formed in the sleeve 73 at equal intervals in a ring shape, a plurality of arc plates 74 are fixedly connected to one side of the push ring 72, the arc plates 74 are in sliding connection with the notches, the fixed seat 71 is fixedly connected with the pump shaft 2, and the push ring 72 is arranged between the fixed seat 71 and the movable ring 6.
Specifically, a plurality of screw holes are formed in the fixing seat 71, and mounting bolts in the screw holes are abutted against the outer wall of the pump shaft 2, so that the fixing seat 71 is fixedly connected with the pump shaft 2, and the elastic piece 8 can drive the push ring 72 to be abutted against the movable ring 6 by means of telescopic sliding fit of the arc plate 74 and the sleeve 73.
Referring to fig. 5 to 6, the arc spring 83 has a semicircular structure in an original long state, and the arc spring 83 has a minor arc structure in a deformed state.
Specifically, the arc spring 83 is made of a metal material with bending deformation and automatic recovery, and by means of the arrangement of a plurality of arc spring 83, the number of application points of the moving ring 6 and the area of a single application point can be increased, so that the moving ring 6 can be pushed uniformly in time.
Referring to fig. 6, one end of an arc spring 83 is rotatably connected with a fixed ring 81, the other end of the arc spring 83 is fixedly connected with a connecting shaft 84, a plurality of arc holes 85 are formed in the fixed ring 81, the connecting shaft 84 is slidably connected with the arc holes 85, a synchronizing ring 86 is arranged on one side, away from the arc spring 83, of the fixed ring 81, and one end of the connecting shaft 84 penetrates through the arc holes 85 and is fixedly connected with the synchronizing ring 86.
Specifically, the arc spring plates 83 are elastically deformed by matching the connecting shaft 84 with the arc holes 85, and are connected with all the arc spring plates 83 by the synchronizing ring 86, so that all the arc spring plates 83 can be synchronously deformed, and the elastic piece 8 is ensured to uniformly apply pressure to the moving ring 6 all the time in the axial direction.
Referring to fig. 3 and 5, a plurality of positioning sliding plates 82 are fixed on the inner ring of the fixed ring 81 at equal intervals, sliding grooves 75 are formed on the outer side walls of the sleeve 73 and the arc plate 74, and the positioning sliding plates 82 are in sliding contact with the sliding grooves 75.
Specifically, the positioning slide plate 82 and the slide groove 75 cooperate to enable the fixing ring 81 to be stably arranged on the telescopic member 7, so that the axial force application of all the elastic members 8 is limited in the same circular range, and the pushing ring 72 is ensured to uniformly apply pressure to the moving ring 6.
Referring to fig. 2, the arc-shaped elastic pieces 83 in two adjacent elastic pieces 8 are staggered, so that the number of force application points of the opposite ring 6 can be increased, and the uniformity of force application is further improved.
Wherein, can dismantle between sleeve pipe 73 and the arc 74, increase, reduce the quantity of elastic member 8 through the selection and make it can satisfy different application scenes, promote application scope, and single elastic member 8 damage the back can replace alone, reduce maintenance cost.
Embodiment 2, refer to fig. 6-9, is a second embodiment of the present invention, and is different from the first embodiment in that the cross section of the connecting ring 91 is in a T-shaped structure, a plurality of arc grooves 92 are formed on the inner ring of the connecting ring 91, the arc grooves 92 are slidably connected with the positioning sliding plate 82, and a plurality of positioning blocks 93 are fixedly connected on the outer ring of the connecting ring 91.
Specifically, the arc-shaped groove 92 is connected with the positioning sliding plate 82, so that the connecting ring 91 has a certain rotation range, the fixed ring 81 rotates relatively with the fixed ring 81 under the influence of inertia when following the rotation of the pump shaft 2, the positioning block 93 is abutted against the connecting shaft 84 under the influence of inertia, so that the resistance of the arc-shaped elastic sheet 83 is increased when the elastic sheet 83 is subjected to recovery deformation, when the movable ring 6 is impacted and is far away from the stationary ring 5, the resistance of the arc-shaped elastic sheet 83 recovery is large, the movable ring 6 can be prevented from being obviously displaced, the movable ring 6 and the stationary ring 5 can be ensured to keep effective contact, and medium leakage can be avoided.
Referring to fig. 9, a plurality of dynamic pressure grooves 94 are formed in the connecting ring 91 at equal intervals in an annular shape on a side away from the fixing ring 81, the width of the dynamic pressure grooves 94 on a side close to the outer ring of the connecting ring 91 is larger than the width of the dynamic pressure grooves on a side close to the inner ring of the connecting ring 91, and the depth of the inlet end of the dynamic pressure grooves 94 is larger than the depth of the outlet end.
Specifically, after the positioning block 93 abuts against the connecting shaft 84, the connecting ring 91 rotates synchronously with the fixed ring 81, at this time, the inlet end of the dynamic pressure groove 94 cuts air or cuts liquid, so as to increase the inertia influence of the connecting ring 91, increase the resistance applied to the connecting shaft 84 by the positioning block 93, and simultaneously increase the rotating friction between the connecting ring 91 and the fixed ring 81 when the air or the liquid passes through the inclined plane of the dynamic pressure groove 94, so as to improve the limiting stability of the positioning block 93 to the connecting shaft 84. The rest of the structure is the same as that of embodiment 1.
Embodiment 3 referring to fig. 1-2, a third embodiment of the present invention is different from the second embodiment in that a cooling cavity 43 is provided on a housing 41, a connection pipe port 44 communicated with the cooling cavity 43 is fixedly provided on the housing 41, a water guide pipe 10 is fixedly connected to the connection pipe port 44, and the other ends of the two water guide pipes 10 are respectively communicated with a water inlet and a water outlet of a pump body 3.
Specifically, when the water pump is used for conveying cooling water, the water inlet of the pump body 3 is used for conveying part of the cooling water into the cooling cavity 43 through the water guide pipe 10, and the part of the cooling water is used for absorbing heat in the sealing shell 4 and then flows to the water outlet of the pump body 3 through the other water guide pipe 10, so that the inside of the sealing shell 4 can be cooled, and the arc-shaped elastic sheet 83 is prevented from reducing the elastic effect in a long-term high-temperature environment. The rest of the structure is the same as that of embodiment 2.
According to the working principle of the invention, in the embodiment 1-3, the motor 1 rotates to drive the pump shaft 2 to rotate, the pump shaft 2 drives the impeller in the pump body 3 to rotate, so that the pump body 3 conveys cooling water to cool nuclear power plant equipment, the arc-shaped elastic sheet 83 in a compressed force accumulation state applies thrust to the push ring 72 in the rotation process of the pump shaft 2, the push ring 72 is abutted with the movable ring 6, the movable ring 6 is kept in rotary contact with the stationary ring 5, thereby avoiding leakage of medium between the pump body 3 and the seal shell 4, and meanwhile, the connecting ring 91 is influenced by inertia to drive the positioning block 93 to be abutted with the connecting shaft 84 during rapid rotation of the pump shaft 2, so that the arc-shaped elastic sheet 83 is prevented from deforming towards the recovery direction, reverse movement of the movable ring 6 during impact is avoided, and the movable ring 6 is ensured to be always kept in effective contact with the stationary ring 5.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a nuclear power station equipment cooling water pump, includes the motor, the motor output is connected with the pump shaft through the shaft coupling, the pump shaft other end is connected with the pump body, be connected with sealing mechanism jointly between pump body and the pump shaft, wherein sealing mechanism includes the seal shell, the seal shell comprises casing and end cover, fixedly connected with quiet ring in the end cover, quiet ring is equipped with the moving ring towards one side of casing, the pump shaft activity runs through casing, quiet ring, end cover, the moving ring cup joints on the pump shaft, the moving ring is equipped with the extensible member in the side that keeps away from quiet ring, the extensible member cup joints on the pump shaft, and be provided with a plurality of elastic components on the extensible member, the elastic component drives the extensible member and extends and make the moving ring butt quiet ring;
the elastic piece comprises a fixed ring sleeved on the telescopic piece, and a plurality of arc-shaped elastic pieces are uniformly distributed on one side of the fixed ring;
The fixed ring is provided with a locating piece towards one side of the arc-shaped elastic sheet, the locating piece comprises a connecting ring rotationally connected with the fixed ring, a plurality of locating blocks are uniformly distributed on the outer ring of the connecting ring, and the locating blocks are used for limiting the restoration deformation of the arc-shaped elastic sheet.
2. The cooling water pump of nuclear power plant equipment of claim 1, wherein the shell is fixedly connected with the end cover, the shell is in sealed rotation connection with the pump shaft, and the end cover is fixedly connected with the pump body.
3. The cooling water pump of nuclear power plant equipment according to claim 1, wherein the telescopic piece comprises a fixed seat and a push ring sleeved on the pump shaft, a sleeve is fixedly connected to one side of the fixed seat facing the push ring, a plurality of notches are formed in the sleeve at equal intervals in an annular shape, a plurality of arc-shaped plates are fixedly connected to one side of the push ring, and the arc-shaped plates are in sliding connection with the notches;
the fixed seat is fixedly connected with the pump shaft, and the push ring is arranged between the fixed seat and the movable ring.
4. The cooling water pump of nuclear power plant equipment of claim 1, wherein the arc-shaped elastic sheet is of a semicircular structure in an original length state, and is of a minor arc-shaped structure in a deformed state.
5. The cooling water pump of nuclear power plant equipment according to claim 1, wherein one end of the arc-shaped elastic piece is rotationally connected with the fixed ring, the other end of the arc-shaped elastic piece is fixedly connected with a connecting shaft, a plurality of arc-shaped holes are formed in the fixed ring, and the connecting shaft is in sliding connection with the arc-shaped holes;
one side of the fixed ring, which is far away from the arc-shaped elastic sheet, is provided with a synchronous ring, and one end of the connecting shaft penetrates through the arc-shaped hole and is fixedly connected with the synchronous ring.
6. The cooling water pump of nuclear power plant equipment of claim 3, wherein the fixed ring inner ring is fixed with a plurality of locating sliding plates at equal intervals, sliding grooves are formed in the outer side walls of the sleeve and the arc-shaped plate, and the locating sliding plates are in sliding contact with the sliding grooves.
7. The cooling water pump of nuclear power plant equipment of claim 6, wherein the cross section of the connecting ring is of a T-shaped structure, a plurality of arc-shaped grooves are formed in the inner ring of the connecting ring, the arc-shaped grooves are connected with the positioning sliding plate in a sliding manner, and a plurality of positioning blocks are fixedly connected to the outer ring of the connecting ring.
8. The cooling water pump of nuclear power plant equipment according to claim 7, wherein the side, far away from the fixed ring, of the connecting ring is provided with a plurality of dynamic pressure grooves at equal intervals in an annular shape, the width of the side, close to the outer ring of the connecting ring, of the dynamic pressure grooves is larger than the width of the side, close to the inner ring of the connecting ring, of the dynamic pressure grooves, and the depth of the inlet end of the dynamic pressure grooves is larger than the depth of the outlet end of the dynamic pressure grooves.
9. The cooling water pump of nuclear power plant equipment according to claim 1, wherein the shell is provided with a cooling cavity, a pipe connecting port communicated with the cooling cavity is fixedly arranged on the shell, a water guide pipe is fixedly connected to the pipe connecting port, and the other ends of the two water guide pipes are respectively communicated with the water inlet and the water outlet of the pump body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510280246.7A CN119802000B (en) | 2025-03-11 | 2025-03-11 | A cooling water pump for nuclear power plant equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510280246.7A CN119802000B (en) | 2025-03-11 | 2025-03-11 | A cooling water pump for nuclear power plant equipment |
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| CN119802000A true CN119802000A (en) | 2025-04-11 |
| CN119802000B CN119802000B (en) | 2025-06-27 |
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| CN202510280246.7A Active CN119802000B (en) | 2025-03-11 | 2025-03-11 | A cooling water pump for nuclear power plant equipment |
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| JPH08502809A (en) * | 1993-08-26 | 1996-03-26 | デューラメタリック・コーポレイション | Face seal with double groove arrangement |
| CN101769378A (en) * | 2009-01-04 | 2010-07-07 | 江苏华阳重工科技股份有限公司 | Ship deep sea sealing device |
| CN203374813U (en) * | 2013-06-05 | 2014-01-01 | 宁波安铱矢密封有限公司 | Mechanical sealing device under grain oil condition |
| CN103671230A (en) * | 2013-12-09 | 2014-03-26 | 无锡艾比德泵业有限公司 | Mechanical sealing structure of centrifugal pump |
| CN209892492U (en) * | 2019-04-02 | 2020-01-03 | 南京双信节能环保设备有限公司 | Stamping pump sealing device |
-
2025
- 2025-03-11 CN CN202510280246.7A patent/CN119802000B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6832790A (en) * | 1989-12-25 | 1991-06-27 | Eagle Industry Co. Ltd. | Improvements in slurry pumps |
| JPH08502809A (en) * | 1993-08-26 | 1996-03-26 | デューラメタリック・コーポレイション | Face seal with double groove arrangement |
| CN101769378A (en) * | 2009-01-04 | 2010-07-07 | 江苏华阳重工科技股份有限公司 | Ship deep sea sealing device |
| CN203374813U (en) * | 2013-06-05 | 2014-01-01 | 宁波安铱矢密封有限公司 | Mechanical sealing device under grain oil condition |
| CN103671230A (en) * | 2013-12-09 | 2014-03-26 | 无锡艾比德泵业有限公司 | Mechanical sealing structure of centrifugal pump |
| CN209892492U (en) * | 2019-04-02 | 2020-01-03 | 南京双信节能环保设备有限公司 | Stamping pump sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119802000B (en) | 2025-06-27 |
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