High-temperature molten salt pump for molten salt energy storage system
By designing a high-temperature molten salt pump with an eccentric pump body and drain pipe, the existing pumps have difficulty in sealing, corrosive leakage and large installation space in high-temperature environments, and the operation effect of compact design, low failure risk and high safety is achieved.
Patent Information
- Application Number
- CN202421510350.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing high-temperature molten salt pumps have problems such as sealing difficulties, risk of corrosive molten salt leakage, large installation space, uneven thermal deformation and bearing wear in high temperature environments.
A high-temperature molten salt pump with an eccentric pump body and a drain pipe was designed. Through the design of the eccentric pump body and a drain pipe, the contact between the high-temperature and corrosive molten salt and the spindle is avoided. The heat dissipation components of forced air-cooled lower fan and upper fan are used to reduce the heat transfer of bearing components, reduce the difficulty of sealing and operating risks.
It effectively avoids corrosion of the spindle by high temperature and corrosive molten salt, reduces the failure risk of bearing components, reduces the difficulty of sealing and operation risks, has a compact design, small installation space, simple operation, and safe and reliable operation.
Smart Images
Figure CN222668393U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-temperature molten salt pump, in particular to a high-temperature molten salt pump for a molten salt energy storage system, which has the advantages of compact design, small installation space, simple operation, safe and reliable operation and low failure risk. Background Art
[0002] The high-temperature molten salt pump is a submersible pump immersed in a high-temperature molten salt medium. It is widely used in solar thermal molten salt energy storage systems and other high-temperature operating conditions.
[0003] Most of the existing high-temperature salt-removing pumps use traditional long-axis submersible pumps or traditional submersible suspended pumps.
[0004] The existing long-axis submersible pump has a drive shaft designed to contact the high-temperature molten salt in the middle of the discharge pipe. The high temperature generated by the high-temperature molten salt is transmitted to the bearing components through the pump shaft. Although various cooling measures are adopted, these are achieved by increasing the upper space distance and adding other structural facilities. In addition, since the discharge pipe is in contact with the drive shaft, the liquid outlet pressure directly acts on the sealing part, which causes a pressure difference between the main shaft sealing part and the atmospheric side, resulting in sealing difficulties and the risk of leakage of high-temperature corrosive molten salt.
[0005] Existing submersible suspension pumps and high-temperature salt-removing pumps basically adopt the traditional outlet-connected independent discharge pipe structure design. Since the discharge pipe is far away from the transmission system protection pipe and there is a large quality difference between the two, it causes uneven thermal deformation under high temperature conditions, increased pump pipeline stress and load, which in turn causes rotor center deflection and bearing wear. In addition, the installation space is large, which is not conducive to on-site layout design. Utility Model Content
[0006] In view of the above problems, the main purpose of the utility model is to provide a high-temperature molten salt pump for a molten salt energy storage system with compact design, small installation space, simple operation, safe and reliable operation, and low failure risk.
[0007] The utility model solves the above technical problems through the following scheme: the high-temperature molten salt pump for the molten salt energy storage system comprises: a pump cover, a pump body, a lower guide bearing component, a rotor component, a discharge pipe component, an intermediate guide bearing component, a coupling component, a base plate assembly, a sealing component, a bearing component, an upper fan, a lower fan, an impeller, a bearing, and a pump shaft which together constitute the rotor component of the pump.
[0008] The suction port of the pump body is vertically sucked from the bottom, and the discharge port of the pump body is discharged vertically after spirally rising. The center line of the discharge port of the pump body is spirally eccentric to one side of the center line of the pump drive shaft. The discharge port of the pump body is integrally connected to the guide bearing seat component passing through the center of the pump body and the main shaft protection pipe seat through the same flange.
[0009] An upper fan and a lower fan are respectively arranged above and below the bearing component, and the lower fan is located between the bearing component and the sealing component.
[0010] The sealing component is installed on the base plate assembly, and a gas sealing connection and purge interface is designed on the sealing component.
[0011] In a specific implementation example of the utility model, when the pump liquid is submerged at a long depth, the discharge pipe component and the main shaft are connected in sections, the discharge pipe components are connected by flanges, an intermediate guide bearing component is designed in the middle, the intermediate guide bearing component is designed with self-lubricating punching holes, and the pump shaft is connected by a coupling component.
[0012] In a specific implementation example of the present utility model, the sealing component is bolted or integrally welded to the base plate assembly.
[0013] In a specific implementation example of the present utility model, the bearing component includes a bearing body, a bearing, and a bearing cover. The bearing component adopts an integrated design, and the bearing body is firmly fixed on the base plate bracket through the bearing cover and the extended screw.
[0014] In a specific implementation example of the utility model, a forced air cooling fan is installed above the pump main shaft sealing component, and a ventilation channel is designed on the base plate assembly to prevent high temperature from being transmitted from the main shaft packing seal to the bearing component.
[0015] In a specific implementation example of the utility model, an upper fan is installed at the coupling position, and together with the heat dissipation fins on the bearing body, a bearing body heat dissipation assembly is formed.
[0016] The positive progressive effect of the utility model is that the high-temperature molten salt pump for the molten salt energy storage system provided by the utility model, the eccentric pump body and the discharge pipe in the utility model enable the pump to effectively avoid the prominent problems of existing products, and compared with existing products, the pump has a compact design, a small installation space, simple operation, safe and reliable operation, and a small risk of failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0018] Figure 2 for Figure 1 A partial enlarged view of the (left side).
[0019] Figure 3 for Figure 1 A partial enlarged view (right).
[0020] The following are the names corresponding to the label numbers in this utility model:
[0021] Pump cover 1, pump body 2, lower guide bearing component 3, rotor component 4, discharge pipe component 5, intermediate guide bearing component 6, coupling component 7, base plate assembly 8, sealing component 9, bearing component 10, upper fan 11, lower fan 12, purge interface 13, extension screw 14, ventilation channel 15, suction port 16, discharge port 17. DETAILED DESCRIPTION
[0022] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.
[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model. Figure 2 for Figure 1 A partial enlarged view of the (left side). Figure 3 for Figure 1 A partial enlarged view of (right side). Figure 1-3 As shown: the high-temperature molten salt pump for the molten salt energy storage system provided by the utility model comprises: a pump cover 1, a pump body 2, a lower guide bearing component 3, a rotor component 4, a discharge pipe component 5, an intermediate guide bearing component 6, a coupling component 7, a base plate assembly 8, a sealing component 9, a bearing component 10, an upper fan 11, a lower fan 12, an impeller, a bearing, and a pump shaft together constitute the rotor component 4 of the pump, the suction port 16 of the pump body 2 is vertically sucked from the lower side, the discharge port of the pump body 2 is vertically discharged after spirally rising, the center line of the discharge port 17 of the pump body is spirally eccentric to one side of the center line of the pump drive shaft, and the pump body discharge port 17 is integrally connected to the lower guide bearing component 3 and the discharge pipe component 5 passing through the center of the pump body through the same flange; the upper fan 11 and the lower fan 12 are respectively arranged above and below the bearing component 10, and the lower fan 12 is located between the bearing component 10 and the sealing component 9; the sealing component 9 is installed on the base plate assembly 8, and a gas sealing connection purge interface 13 is designed on the sealing component 9.
[0024] In the specific implementation process, when the pump liquid submersion depth is long, the discharge pipe component 5 and the main shaft are connected in sections, and the discharge pipe components 5 are connected by flanges. An intermediate guide bearing component 6 is designed in the middle, and self-lubricating punching holes are designed on the intermediate guide bearing component 6. The pump shaft is connected by a coupling component 7.
[0025] In the implementation process of this utility model, if Figure 1 As shown: the sealing component 9 is bolted or integrally welded to the base plate assembly 8.
[0026] The bearing component 10 includes a bearing body, a bearing, and a bearing cover. The bearing component 10 adopts an integrated design, and the bearing body is firmly fixed on the base plate bracket through the bearing cover and the extended screw 14.
[0027] A forced air cooling fan 12 is installed above the pump main shaft sealing component 9, and a ventilation channel is designed on the base plate assembly 8 to prevent high temperature from being transmitted from the main shaft packing seal to the bearing component.
[0028] An upper fan 11 is installed at the coupling position, and together with the heat dissipation fins on the bearing body, it forms a bearing body heat dissipation component.
[0029] The eccentric pump body and discharge pipe adopted in the utility model make the high temperature and corrosive molten salt and the main shaft separated, effectively preventing the contact between the high temperature and corrosive molten salt and the main shaft, reducing the corrosion of the molten salt on the main shaft, reducing the high temperature heat transferred to the bearing components through the main shaft, and effectively reducing the risk of failure of the bearing components. In addition, the high temperature and corrosive molten salt is effectively separated from the main shaft seal, so that the working pressure of the medium no longer directly acts on the main shaft seal part, fundamentally eliminating the risk of leakage of the high temperature and corrosive molten salt medium from the main shaft end, reducing the sealing difficulty and reducing the operation and maintenance risks. The distance between the discharge pipe and the pump operation center is effectively increased, so that the overall center of gravity of the pump returns to the vicinity of the pump operation center line, the pump runs more smoothly, reduces the risk of failure of the bearing components, and greatly reduces the installation foundation space.
[0030] The utility model discloses that the drain pipe and the main shaft protection pipe are integrally connected and manufactured by a special-shaped flange, which effectively solves the problem of instability of the existing structure split design. The built-in guide bearing lubrication and flushing structure effectively reduces the risk of high-temperature deformation and failure of the external connecting pipe, while reducing the number of parts and components and reducing the processing and manufacturing costs.
[0031] The utility model is equipped with a forced air cooling lower fan at the pump main shaft sealing component and a ventilation channel is designed on the base plate bracket to prevent high temperature from being transmitted from the main shaft packing seal to the bearing component. An upper fan is installed at the coupling part, and together with the heat dissipation fins on the bearing body, a bearing body heat dissipation assembly is formed, which has a compact structure, high heat dissipation efficiency and greatly reduces the design space.
[0032] The eccentric pump body and the discharge pipe in the utility model enable the pump to effectively avoid the prominent problems of existing products. Compared with existing products, the pump has a compact design, a small installation space, simple operation, safe and reliable operation, and a small risk of failure.
[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A high-temperature molten salt pump for a molten salt energy storage system, characterized in that: The high-temperature molten salt pump for the molten salt energy storage system comprises: a pump cover, a pump body, a lower guide bearing component, a rotor component, a discharge pipe component, an intermediate guide bearing component, a coupling component, a base plate assembly, a sealing component, a bearing component, an upper fan, a lower fan, an impeller, a bearing, and a pump shaft, which together constitute the rotor component of the pump. The suction port of the pump body is vertically sucked from the bottom, and the discharge port of the pump body is discharged vertically after spirally rising. The center line of the discharge port of the pump body is spirally eccentric to one side of the center line of the pump drive shaft. The discharge port of the pump body is integrally connected to the lower guide bearing component and the discharge pipe component passing through the center of the pump body through the same flange; An upper fan and a lower fan are respectively arranged above and below the bearing component, and the lower fan is located between the bearing component and the sealing component; The sealing component is installed on the base plate assembly, and a gas sealing connection and purge interface is designed on the sealing component.
2. The high-temperature molten salt pump for the molten salt energy storage system according to claim 1, characterized in that: When the pump is submerged at a long depth, the discharge pipe components and the main shaft are connected in sections, the discharge pipe components are connected by flanges, an intermediate guide bearing component is designed in the middle, the intermediate guide bearing component is designed with self-lubricating punching holes, and the pump shaft is connected by a coupling component.
3. The high-temperature molten salt pump for the molten salt energy storage system according to claim 1, characterized in that: The sealing component is bolted or integrally welded to the base plate assembly.
4. The high-temperature molten salt pump for the molten salt energy storage system according to claim 1, characterized in that: The bearing component includes a bearing body, a bearing, and a bearing cover. The bearing component adopts an integrated design, and the bearing body is firmly fixed on the base plate bracket through the bearing cover and the extended screw.
5. The high-temperature molten salt pump for the molten salt energy storage system according to claim 1, characterized in that: A forced air cooling fan is installed above the pump main shaft sealing component, and a ventilation channel is designed on the base plate assembly to prevent high temperature from being transmitted from the main shaft packing seal to the bearing component.
6. The high-temperature molten salt pump for the molten salt energy storage system according to claim 1, characterized in that: An upper fan is installed at the coupling position, which together with the heat dissipation fins on the bearing body constitutes a bearing body heat dissipation component.