CN213511229U - High-temperature molten salt pump - Google Patents
High-temperature molten salt pump Download PDFInfo
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- CN213511229U CN213511229U CN202022400792.5U CN202022400792U CN213511229U CN 213511229 U CN213511229 U CN 213511229U CN 202022400792 U CN202022400792 U CN 202022400792U CN 213511229 U CN213511229 U CN 213511229U
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- pump
- molten salt
- bottom plate
- impeller
- liquid outlet
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- 150000003839 salts Chemical class 0.000 title claims abstract description 58
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 40
- 230000017525 heat dissipation Effects 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 37
- 238000007599 discharging Methods 0.000 abstract description 8
- 230000035939 shock Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 210000004907 gland Anatomy 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a high-temperature molten salt pump, the inside of the pump is worn from top to bottom and is equipped with the main shaft, the bottom of the pump is equipped with the suction cover, the upper portion of the suction cover is equipped with the discharging body, the center of the suction cover is equipped with the impeller, the outer circle of the impeller and the upper end are equipped with the guide vane, the bottom of the discharging body is connected with the suction cover through the bolt, the top of the discharging body is connected with the cylindrical pipe through the bolt, the outer circle of the guide vane is connected with the suction cover and the inner spigot of the discharging body in a matching way, the upper portion of the discharging body is equipped with the sliding bearing body, the sliding bearing; the utility model discloses improve the drain pipe mode, set up power seal above the drain pipe, be gaseous between power seal and bottom plate, realize the thermal insulation of high temperature medium, do not have high temperature fused salt and directly conduct the bottom plate and the support of pump to the heat, guarantee that the temperature of axle has a reasonable temperature gradient to installation bearing department from the high temperature end of bottom plate department, avoid traditional cooling method's axle temperature shock and arouse the stress deformation of axle.
Description
Technical Field
The utility model relates to a high temperature molten salt pump belongs to single-stage, single suction, submerged pump type, is applicable to the special pump of carrying high temperature molten salt medium for melamine project, aluminium oxide project, caustic soda project, solar energy power generation etc..
Background
The high-temperature molten salt pump is used for conveying molten salt in a molten state, the temperature of the molten salt is usually 220-560 ℃, and the molten salt is a high-temperature and high-melting-point medium. The traditional molten salt pump adopts a sliding bearing with a self-flushing pipe, when the molten salt pump is stopped, most of molten salt filled in the pump flows back into a tank body, the molten salt is accumulated and solidified due to stopping heating at positions such as a sliding bearing gap and an opening ring gap, and when a motor is started to drive a pump main shaft to rotate, the main shaft is broken or other parts are damaged due to the fact that the molten salt in the pump is in a molten state; or when reheating is insufficient, turning can be performed, but the self-flushing pipeline is not completely melted, and the starting can cause dry friction of the sliding bearing and damage of the sliding bearing.
High-temperature molten salt conveyed by the traditional molten salt pump is discharged from an outlet section on the bottom plate along the shaft, and heat is directly transferred to the bearing frame and the bearing. Therefore, the problem of operation failure of the pump caused by bearing lubrication failure due to overhigh temperature of the bearing caused by heat conduction of the high-temperature molten salt pump occurs. Therefore, the high-temperature medium transfer pump needs to cool the bearing and the like effectively in real time. The cooling mode of the traditional molten salt pump is that the shaft temperature suddenly drops caused by directly using a water cooling sleeve to carry out water cooling on the bottom plate and the upper part of the outlet section, so that the stress deformation problem of the shaft is caused.
Disclosure of Invention
In order to solve the problem that the bearing temperature is overhigh due to the heat conduction of the high-temperature molten salt pump, the high-temperature molten salt pump provided by the utility model designs a special liquid outlet pipe mode, a power seal is arranged above the liquid outlet pipe, and a drainage hole is arranged between the power seal and a bottom plate, so that an air cavity is formed because no molten salt exists in an upper cylindrical pipe and is used for isolating heat; the pump has the advantages that high-temperature molten salt is not used for directly conducting heat to the bottom plate and the support of the pump, temperature shock caused by the temperature from the pump part filled with molten salt medium at the part under liquid to the bearing chamber cooling cavity at the part above liquid is avoided, and reasonable temperature drop gradient of the shaft and the support is realized. And through structural design, the heat conduction of a high-temperature medium is reduced, and the normal operation of the rolling bearing is ensured.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a main shaft penetrates through the interior of a high-temperature molten salt pump from top to bottom, a suction cover is arranged at the bottom of the pump, a discharging body is arranged at the upper part of the suction cover, an impeller is arranged in the center of the suction cover, guide vanes are arranged on the outer circle and the upper end of the impeller, and the bottom end of the main shaft penetrates through the centers of the impeller and the guide vanes in sequence; the bottom end of the discharge body is connected with the suction cover through a bolt, the top end of the discharge body is connected to the cylindrical pipe through a bolt, the outer circle of the guide vane is matched and connected with the suction cover and the inner spigot of the discharge body, a sliding bearing body is arranged above the discharge body, and a bushing is arranged in the sliding bearing body and has a supporting function on the rotor; the sliding bearing body is connected with the discharge body and the cylindrical pipe through a flange;
a bottom plate is arranged in the middle of the pump, a bearing component connecting frame is arranged on the bottom plate, the bottom end of the connecting frame is connected with an upper cylindrical pipe through a bolt, and the upper cylindrical pipe at the section plays a role of a heat insulation layer; a heat dissipation rib plate is arranged between the connecting frame positioned at the upper part of the bottom plate and the bottom plate, a bearing frame is arranged above the connecting frame, a bearing chamber is arranged in the bearing frame, a motor frame is arranged above the bearing chamber, and a coupler and a motor are installed;
the outlet section of the pump positioned below the bottom plate is provided with a liquid outlet pipe, the liquid outlet pipe is of an L-shaped structure, one end of the liquid outlet pipe is communicated with the inside of the pump, and the other end of the liquid outlet pipe extends to the upper end of the bottom plate; the position of the pump, which is higher than the root of the liquid outlet pipe, is connected with an auxiliary impeller through a bolt, and an air cavity is formed in an upper cylindrical pipe between the auxiliary impeller and the bottom plate; the pump forms dynamic seal through the auxiliary impeller, and the heat transfer generated by high-temperature media at the lower part of the pump is isolated through the auxiliary impeller seal.
Furthermore, an annular cavity is further arranged below the auxiliary impeller, the pump spindle penetrates through the center of the annular cavity, the lower portion of the inner wall of the annular cavity is connected with the sliding bearing body, the liquid outlet pipe is communicated with the outer wall of the annular cavity on one side of the outlet section where the liquid outlet pipe is located, a first drainage hole is formed in the lower portion of the annular cavity far away from the direction of the liquid outlet pipe, and the first drainage hole penetrates through the inner wall and the outer wall of the annular cavity and is used for enabling a leakage medium to flow back to.
Further, a second drainage hole is formed in the lower end of the upper cylindrical pipe;
the outlet section comprises: the annular cavity, the upper flange and the lower flange of the annular cavity, the first drainage hole and the liquid outlet pipe head;
furthermore, a local processing groove design is adopted on the contact surface of the bottom plate and the connecting frame, and a cavity is formed on the connecting surface to reduce heat conduction;
furthermore, the heat dissipation rib plate is of a vertical structure, a connecting seat is arranged at the bottom of the heat dissipation rib plate and connected to the connecting seat through a bolt, and the connecting seat is connected with the bottom plate through a bolt; the contact surface of the bottom of the connecting seat and the upper end of the bottom plate is provided with a heat insulation groove, and the rib plate can be used as a radiating fin and can also effectively reduce the cross-sectional area of metal and reduce heat conduction;
furthermore, parts which are easy to accumulate media, such as the guide vane, the exhaust body, the auxiliary impeller cavity and the like, are designed into inclined planes, so that the media can flow back to the inlet of the pump after the machine is stopped.
Furthermore, a fan structure is arranged on the pump main shaft above the connecting frame, the fan is tightly matched with the shaft, and a fan effect can be generated under the rotation action of the shaft to take away heat; the bearing frame is provided with a bearing chamber, the upper end of a bearing body in the bearing chamber is provided with a bearing gland, the bearing gland is connected with the bearing body through a bolt, the upper end of the bearing gland is provided with an oil nozzle, the lower part of the bearing body is supported by the bearing frame, the bottom end of the bearing frame is provided with a connecting flange, a cavity at the bottom of the connecting frame and the bearing frame is internally provided with a fan, and the fan sucks compressed air and discharges the compressed air downwards for cooling the heat dissipation ribs;
a cooling cavity is arranged on the lower flange of the bearing frame, a cooling air inlet is arranged in the cooling cavity, an air cooling flow channel is formed at the positions of a shaft, a shaft and an inner hole of the stationary part from the cooling air inlet to the lower part and a heat dissipation rib plate at the lower part of the shaft and the inner hole of the stationary part, a labyrinth type cooling bush is arranged around a main shaft at the position of the cooling cavity, a water cooling structure is arranged in the cooling cavity, the water cooling structure is arranged at the outer side of the cooling bush and is respectively connected with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet are arranged;
in the cooling structure, normal-temperature compressed air is cooled by the water-cooling jacket and then reversely flows along the axial high-temperature area to take away heat, so that the temperature rise of the shaft is further reduced, and the temperature of the shaft reaches the normal temperature near the bearing chamber;
further, a shaft sleeve is arranged in the sliding bearing body, the shaft sleeve is tightly matched with the outer wall of the main shaft, a shaft bushing is arranged between the shaft sleeve and the inner wall of the sliding bearing body, and the shaft sleeve and the shaft bushing form a sliding bearing with medium lubrication; the annular cavity at the upper part of the sliding bearing is communicated with the liquid outlet pipe; the medium pressurized and brought out by the impeller at the lower part of the pump passes through the sliding bearing gap at the outlet section, the medium lubricates the sliding bearing and then flows to the direction of the auxiliary impeller, and the pressure is relieved through the throttling of the sliding bearing and the first relief hole, so that the pressure at the power sealing part can be reduced; the medium with reduced pressure is reversely pressurized by the auxiliary impeller to prevent the medium from leaking to the upper cylindrical pipe; if the auxiliary impeller is insufficient in capacity, a small amount of leakage exists, and leaked media flow back to the molten salt tank through a second leakage hole of the upper cylindrical pipe at the upper end;
furthermore, the power sealing form of the auxiliary impeller and the pressure of the outlet of the pump can adopt a two-stage or multi-stage auxiliary impeller structure;
furthermore, the impeller and the guide vane adopt advanced design means to simulate and hydraulically correct a hydraulic model, so that the efficiency and the energy are high, the reaction pulse of the outlet of the vane and the guide vane is small, the radial force is small, and the service life of the liquid sliding bearing is prolonged; the impeller can be designed into 2 or more stages according to requirements; the impeller part is designed into a local dry shaft structure, so that the impeller is convenient to disassemble.
Furthermore, the liquid outlet pipe adopts a free telescopic structure, so that the deformation of the pump body caused by the thermal deformation of different parts is prevented, and the use is prevented from being influenced.
Furthermore, the pump is provided with a failure alarm system, and the failure of the pump is alarmed through the temperature rise and vibration detection and analysis of the bearing of the pump, so that the maintenance work is done in advance.
Adopt above-mentioned technical scheme, the utility model discloses a working process and principle are:
the motor drives the main shaft of the pump to rotate, mechanical energy is converted into kinetic energy of fluid through the rotation of an impeller at the bottom of the pump, and molten salt flows upwards in the pump along the main shaft; the medium applies pressure downwards to the medium under the action of the auxiliary impeller on the upper part, so that sealing is realized, the medium is prevented from entering the upper cylindrical pipe above the auxiliary impeller, an air cavity is formed in the upper cylindrical pipe between the upper part of the auxiliary impeller and the bottom plate, the function of a heat insulation layer is realized, high-temperature molten salt below the auxiliary impeller and components above the bottom plate are isolated, heat conduction is reduced, and heat transferred to bearing components is reduced;
in the process, when the pump normally works, most of the molten salt is discharged from the liquid outlet pipe through the main flow channel, the rest of the molten salt flows upwards through the gap of the sliding bearing and enters the space formed by the inner wall of the annular cavity, after entering, a part of the molten salt flows back to the molten salt tank through the first flow discharge hole, and the pressure of the molten salt is reduced; the residual molten salt enters the cavity at the upper part of the sliding bearing, and the molten salt is sealed in the cavity below the auxiliary impeller under the dynamic sealing action of the auxiliary impeller; if the auxiliary impeller is not completely sealed, the residual small amount of molten salt leaks to the upper cylindrical pipe through the auxiliary impeller seal and flows back to the molten salt tank through the second drain hole of the upper cylindrical pipe.
The utility model has the advantages that:
the utility model discloses improve the drain pipe mode, set up the power seal above the drain pipe, be gaseous between power seal and bottom plate, realized the thermal insulation of high temperature medium, there is not high temperature fused salt to directly conduct the heat to the bottom plate and the support of pump, guarantee that the temperature of axle has a reasonable temperature drop gradient from the high temperature end of bottom plate department to installation bearing department, avoid the axle temperature shock of traditional cooling methods to cause the stress deformation of axle; the submerged part of the pump rotor is supported by a sliding bearing and adopts self-flushing; the liquid outlet pipe of the pump is provided with an expansion joint to meet the requirements of expansion with heat and contraction with cold, the submerged depth of the pump can reach 18m, the temperature of a conveying medium reaches 560 ℃, and the pump is suitable for conveying a high-temperature molten salt medium and is a high-temperature molten salt (nitrate) circulation system or a special pump for molten salt conveying.
Drawings
Fig. 1 is a structural diagram of the present invention.
Fig. 2 is a design structure view of a sub-impeller slope.
FIG. 3 is a vane ramp design block diagram.
In the figure, 1, a cylindrical pipe, 1.1, an upper cylindrical pipe, 2, a main shaft, 3, a suction cover, 4, a discharge body, 5, an impeller, 6, a guide vane, 7-1, a sliding bearing body, 7-2, a shaft bushing, 7-3, a shaft sleeve, 8, a bottom plate, 9, a heat insulation layer, 10, a connecting frame, 11, a heat dissipation rib plate, 12, a connecting seat, 13, a motor, 14, a liquid outlet pipe, 14.1, a liquid outlet pipe head, 15, an auxiliary impeller, 16, an air cavity, 17, an annular cavity, 17.1, an annular cavity inner wall, 17.2, an annular cavity outer wall, 18, a first drainage hole, 19, a heat insulation groove, 20, a fan, 21, a connecting plate, 22, a cooling lining, 23, a bearing frame, 24, a bearing body, 25, a bearing gland, 26, an oil nozzle, 27, a cooling air inlet, 28, a cooling water inlet, 29, a cooling water outlet, 30, a motor frame, 31, a coupler, 32 and a second drainage, 33. And (5) refluxing the inclined plane.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a high-temperature molten salt pump, a main shaft 2 penetrates through the inside of the pump from top to bottom, a suction cover 3 is arranged at the bottom of the pump, a discharge body 4 is arranged at the upper part of the suction cover 3, an impeller 5 is arranged at the center of the suction cover 3, guide vanes 6 are arranged at the outer circle and the upper end of the impeller 5, and the bottom end of the main shaft 2 sequentially penetrates through the centers of the impeller 5 and the guide vanes 6; the bottom end of the discharging body 4
The guide vane is connected with the suction cover 3 through a bolt, the top end of the discharge body 4 is connected with the cylindrical pipe 1 through a bolt, the outer circle of the guide vane 6 is matched and connected with the suction cover 3 and the inner rabbet of the discharge body 4, a sliding bearing body 7-1 is arranged above the discharge body 4, and a bushing 7-2 is arranged in the sliding bearing body 7-1 and has a supporting function on a rotor; the sliding bearing body 7-1 is connected with the discharging body 4 and the cylindrical pipe 1 through a flange;
a bottom plate 8 is arranged in the middle of the pump, a bearing part connecting frame is installed on the bottom plate 8, the bottom end of the connecting frame 10 is connected with an upper cylindrical pipe 1.1 through a bolt, a heat dissipation rib plate 11 is arranged between the connecting frame 10 positioned on the upper portion of the bottom plate 8 and the bottom plate 8, a bearing frame 23 is arranged above the connecting frame 10, a bearing chamber is arranged in the bearing frame 23, a motor frame 30 is arranged above the bearing chamber, a motor is installed on the motor frame, and a coupler 31 is installed at the upper end of the main shaft 2;
a liquid outlet pipe 14 is arranged at the outlet section of the pump positioned below the bottom plate 8, the liquid outlet pipe 14 is of an L-shaped structure, one end of the liquid outlet pipe 14 is communicated with the inside of the pump, and the other end of the liquid outlet pipe extends to the upper end of the bottom plate 8; the auxiliary impeller 15 is arranged above the pump outlet section to form auxiliary impeller power seal, an air cavity 16 is formed in the pump between the auxiliary impeller 15 and the bottom plate 8, and heat transfer generated by high-temperature media at the lower part of the pump is isolated through the air cavity 16.
An annular cavity 17 is further arranged below the auxiliary impeller 15, the pump spindle 2 penetrates through the center of the annular cavity 17, the lower portion of the inner wall 17.1 of the annular cavity is connected with the sliding bearing body 7-1, the liquid outlet pipe 14 is communicated with the outer wall 17.2 of the annular cavity on one side of the outlet section where the liquid outlet pipe is located, a first drainage hole 18 is formed in the lower portion of the annular cavity 17 far away from the direction of the liquid outlet pipe 14, and the first drainage hole 18 penetrates through the inner wall 17.1 and the outer wall 17.2 of the annular cavity and is used for enabling leakage media to flow back.
Further, the lower end of the upper cylindrical pipe 1.1 is provided with a second drainage hole 32;
the outlet section comprises: the annular cavity 17, the upper flange and the lower flange of the annular cavity 17, the first drain hole 18 and the liquid outlet pipe head 14.1;
furthermore, the contact surface of the bottom plate 8 and the connecting frame 10 adopts a local processing groove design, and a cavity is formed on the connecting surface to reduce heat conduction;
further, the heat dissipation rib plate 11 is of a vertical structure, the heat dissipation rib plate 11 and the connecting frame 10 are cast or welded into a whole, and the connecting frame 10 is connected with the bottom plate 8 through bolts; the lower part of the connecting frame is of a flange 12 structure, and a heat insulation groove 19 is arranged on the contact surface of the upper end of the bottom plate 8; the rib plate can be used as a radiating fin, the cross-sectional area of metal can be effectively reduced, and heat conduction is reduced;
furthermore, a fan structure is arranged on the pump main shaft 2 above the connecting frame 10, the fan is tightly matched with the shaft, heat can be better transferred, and a fan effect can be generated under the rotation action of the shaft to take away heat; a bearing chamber is arranged on the bearing frame 23, a bearing gland 25 is arranged at the upper end of a bearing body 24 in the bearing chamber, the bearing gland 25 is connected with the bearing body 24 through a bolt, an oil nozzle 26 is arranged at the upper end of the bearing gland 25, the lower part of the bearing body 24 is supported by the bearing frame 23, a connecting plate 21 is arranged at the bottom end of the bearing frame 23, a fan 20 is arranged at the bottom of the connecting plate 21, and the fan 20 blows compressed air downwards for cooling heat dissipation ribs;
a cooling cavity is arranged on a flange below the bearing frame 23, the cooling cavity is provided with a cooling air inlet 27, an air cooling flow channel is formed from the cooling air inlet 27 to a connecting plate 21 at the lower part and a heat dissipation rib plate 11 at the lower part of the connecting plate, a labyrinth type cooling bush 22 is sleeved on a main shaft at the position of the cooling cavity, the cooling cavity is provided with a water cooling structure, the water cooling structure is arranged on the outer side of the cooling bush and is respectively connected with a cooling water inlet 28 and a cooling water outlet 29, and the cooling water inlet 28 and the cooling water outlet 29 are arranged at the two sides of the cooling cavity in a low-inlet; an inner cavity formed by the connecting frame 10 and the bearing frame 23 is provided with a fan 20;
after being cooled by the water cooling jacket, the normal-temperature compressed air reversely flows along the axial high-temperature area to take away heat, so that the temperature rise of the shaft is further reduced, and the temperature of the shaft reaches the normal temperature near the bearing chamber;
further, a shaft sleeve 7-3 is arranged inside the sliding bearing body 7-1, the shaft sleeve 7-3 is tightly matched with the outer wall of the main shaft 2, and a shaft bushing 7-2 is arranged between the shaft sleeve 7-3 and the inner wall of the sliding bearing body 7-1; a flow channel is formed in the annular cavity space above the sliding bearing and is communicated with the liquid outlet pipe 14, a medium brought out by the acting force of the impeller 5 at the lower part of the pump flows to the inner wall 17.1 of the annular cavity through the gap of the sliding bearing, and the pressure at the power sealing part can be reduced through the throttling of the sliding bearing;
meanwhile, the auxiliary impeller performs a sealing function on the medium by reversely pressurizing, if the capacity of the auxiliary impeller is insufficient, a small amount of leakage exists, and the leaked medium flows back into the molten salt tank through a second drain hole 32 of the upper cylindrical pipe 1.1 at the upper end;
through the measures, the temperature of the shaft is guaranteed to have a reasonable temperature drop gradient from the high temperature of the bottom plate 8 to the position of the bearing, and the problem that the stress deformation of the shaft is caused by the sudden temperature drop of the shaft caused by the fact that the traditional molten salt pump directly uses a water cooling sleeve to cool water above the bottom plate and the outlet section is solved.
The utility model discloses the part that overflows adopts inclined plane backward flow 33 design, and the molten salt of being convenient for flows back to in the jar when parkking, prevents that the molten salt from storing up in a large number in the pump, reduces to solidify under normal atmospheric temperature after taking out the pump when the maintenance, increases and dismantles the degree of difficulty, causes the maintenance difficulty.
Axial outflow is adopted at the lower end (immersed in liquid) of the pump, when the pump reaches the position of the outlet section, a dynamic sealing structure is adopted, pumping media are discharged from a single liquid outlet pipe, and the pressure of the pumping high-pressure media is not born between a shaft and a connecting frame at the bottom plate of the upper end.
The utility model relates to a high-temperature molten salt pump which is designed into a single-stage, single-suction and submerged pump type, the pump adopts a closed centrifugal impeller, and the structural design ensures that the molten salt liquid automatically flows back into a tank body when the pump is stopped; the heat transfer is reduced during operation, the service life of the rolling bearing is prolonged, and the reliable operation and convenient maintenance of the high-temperature molten salt pump are ensured.
Claims (9)
1. A high-temperature molten salt pump is characterized in that: a main shaft penetrates through the interior of the pump from top to bottom, a suction cover is arranged at the bottom of the pump, a discharge body is arranged at the upper part of the suction cover, an impeller is arranged in the center of the suction cover, a guide vane is arranged on the impeller, and the bottom end of the main shaft sequentially penetrates through the impeller and the center of the guide vane; the bottom end of the discharge body is connected with the suction cover through a bolt, the top end of the discharge body is connected to the cylindrical pipe through a bolt, the outer circle of the guide vane is matched and connected with the suction cover and the inner spigot of the discharge body, a sliding bearing body is arranged above the discharge body, a bushing is arranged in the sliding bearing body, and the sliding bearing body is connected with the discharge body and the cylindrical pipe through a flange;
a bottom plate is arranged in the middle of the pump, a bearing part connecting frame is arranged on the bottom plate, and the bottom end of the connecting frame is connected with an upper cylindrical pipe through a bolt; a heat dissipation rib plate is arranged between the connecting frame and the bottom plate, which are positioned at the upper part of the bottom plate, a bearing frame is arranged above the connecting frame, a bearing chamber is arranged on the bearing frame, a motor frame is arranged above the bearing chamber, and a motor is arranged on the motor frame;
a liquid outlet pipe is arranged at the outlet section of the pump positioned below the bottom plate, the liquid outlet pipe is of an L-shaped structure, one end of the liquid outlet pipe is communicated with the inside of the pump, and the other end of the liquid outlet pipe extends to the upper end of the bottom plate; the position of the pump higher than the root of the liquid outlet pipe is connected with an auxiliary impeller through a bolt.
2. A high temperature molten salt pump according to claim 1, wherein: an air cavity is formed in the upper cylindrical pipe between the auxiliary impeller and the bottom plate; the pump forms a dynamic seal with the expeller.
3. A high temperature molten salt pump according to claim 1, wherein: and an annular cavity is further arranged below the auxiliary impeller, the pump spindle penetrates through the center of the annular cavity, the lower part of the inner wall of the annular cavity is connected with the sliding bearing body, the liquid outlet pipe is communicated with the outer wall of the annular cavity on one side of the outlet section where the liquid outlet pipe is located, a first drainage hole is formed in the lower part of the annular cavity far away from the direction of the liquid outlet pipe, and the first drainage hole penetrates through the inner wall and the outer wall of the annular cavity and is used for returning leakage media to.
4. A high temperature molten salt pump according to claim 1, wherein: and a second drainage hole is formed in the lower end of the upper cylindrical pipe.
5. A high temperature molten salt pump according to claim 1, wherein: and the contact surface of the bottom plate and the connecting frame adopts a design of locally processing grooves.
6. A high temperature molten salt pump according to claim 1, wherein: the heat dissipation rib plate is of a vertical structure, a connecting seat is arranged at the bottom of the heat dissipation rib plate and connected to the connecting seat through a bolt, and the connecting seat is connected with the bottom plate through a bolt; the contact surface of the bottom of the connecting seat and the upper end of the bottom plate is provided with a heat insulation groove.
7. A high temperature molten salt pump according to claim 1, wherein: the fan structure is arranged on the pump main shaft above the connecting frame and is tightly matched with the shaft.
8. A high temperature molten salt pump according to claim 2, wherein: the power seal in the form of an auxiliary impeller can adopt a two-stage or multi-stage auxiliary impeller structure according to the pressure of the outlet of the pump.
9. A high temperature molten salt pump according to claim 1, wherein: the impeller can be designed into 2 or more stages according to requirements; the impeller part is designed into a local dry shaft structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400792.5U CN213511229U (en) | 2020-10-26 | 2020-10-26 | High-temperature molten salt pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400792.5U CN213511229U (en) | 2020-10-26 | 2020-10-26 | High-temperature molten salt pump |
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| Publication Number | Publication Date |
|---|---|
| CN213511229U true CN213511229U (en) | 2021-06-22 |
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ID=76410370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022400792.5U Active CN213511229U (en) | 2020-10-26 | 2020-10-26 | High-temperature molten salt pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213511229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096615A (en) * | 2020-10-26 | 2020-12-18 | 大连海特泵业有限公司 | High-temperature molten salt pump |
-
2020
- 2020-10-26 CN CN202022400792.5U patent/CN213511229U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096615A (en) * | 2020-10-26 | 2020-12-18 | 大连海特泵业有限公司 | High-temperature molten salt pump |
| CN112096615B (en) * | 2020-10-26 | 2025-03-25 | 大连海特泵业有限公司 | High temperature molten salt pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A high-temperature molten salt pump Effective date of registration: 20230314 Granted publication date: 20210622 Pledgee: Bank of China Limited Dalian Ganjingzi Sub branch Pledgor: DALIAN HTECH PUMP Co.,Ltd. Registration number: Y2023210000037 |